@x402/evm - npm Package Compare versions

Comparing version 2.2.0 to 2.3.0

dist/cjs/permit2-BYv82va2.d.ts

+import { SchemeNetworkClient, PaymentRequirements, PaymentPayloadResult } from '@x402/core/types';
+import { C as ClientEvmSigner } from './signer-5OVDxViv.js';
+
+/**
+ * EVM client implementation for the Exact payment scheme.
+ * Supports both EIP-3009 (transferWithAuthorization) and Permit2 flows.
+ *
+ * Routes to the appropriate authorization method based on
+ * `requirements.extra.assetTransferMethod`. Defaults to EIP-3009
+ * for backward compatibility with older facilitators.
+ */
+declare class ExactEvmScheme implements SchemeNetworkClient {
+    private readonly signer;
+    readonly scheme = "exact";
+    /**
+     * Creates a new ExactEvmClient instance.
+     *
+     * @param signer - The EVM signer for client operations
+     */
+    constructor(signer: ClientEvmSigner);
+    /**
+     * Creates a payment payload for the Exact scheme.
+     * Routes to EIP-3009 or Permit2 based on requirements.extra.assetTransferMethod.
+     *
+     * @param x402Version - The x402 protocol version
+     * @param paymentRequirements - The payment requirements
+     * @returns Promise resolving to a payment payload result
+     */
+    createPaymentPayload(x402Version: number, paymentRequirements: PaymentRequirements): Promise<PaymentPayloadResult>;
+}
+
+/**
+ * ERC20 allowance ABI for checking approval status.
+ */
+declare const erc20AllowanceAbi: readonly [{
+    readonly type: "function";
+    readonly name: "allowance";
+    readonly inputs: readonly [{
+        readonly name: "owner";
+        readonly type: "address";
+    }, {
+        readonly name: "spender";
+        readonly type: "address";
+    }];
+    readonly outputs: readonly [{
+        readonly type: "uint256";
+    }];
+    readonly stateMutability: "view";
+}];
+/**
+ * Creates transaction data to approve Permit2 to spend tokens.
+ * The user sends this transaction (paying gas) before using Permit2 flow.
+ *
+ * @param tokenAddress - The ERC20 token contract address
+ * @returns Transaction data to send for approval
+ *
+ * @example
+ * ```typescript
+ * const tx = createPermit2ApprovalTx("0x...");
+ * await walletClient.sendTransaction({
+ *   to: tx.to,
+ *   data: tx.data,
+ * });
+ * ```
+ */
+declare function createPermit2ApprovalTx(tokenAddress: `0x${string}`): {
+    to: `0x${string}`;
+    data: `0x${string}`;
+};
+/**
+ * Parameters for checking Permit2 allowance.
+ * Application provides these to check if approval is needed.
+ */
+interface Permit2AllowanceParams {
+    tokenAddress: `0x${string}`;
+    ownerAddress: `0x${string}`;
+}
+/**
+ * Returns contract read parameters for checking Permit2 allowance.
+ * Use with a public client to check if the user has approved Permit2.
+ *
+ * @param params - The allowance check parameters
+ * @returns Contract read parameters for checking allowance
+ *
+ * @example
+ * ```typescript
+ * const readParams = getPermit2AllowanceReadParams({
+ *   tokenAddress: "0x...",
+ *   ownerAddress: "0x...",
+ * });
+ *
+ * const allowance = await publicClient.readContract(readParams);
+ * const needsApproval = allowance < requiredAmount;
+ * ```
+ */
+declare function getPermit2AllowanceReadParams(params: Permit2AllowanceParams): {
+    address: `0x${string}`;
+    abi: typeof erc20AllowanceAbi;
+    functionName: "allowance";
+    args: [`0x${string}`, `0x${string}`];
+};
+
+export { ExactEvmScheme as E, type Permit2AllowanceParams as P, createPermit2ApprovalTx as c, erc20AllowanceAbi as e, getPermit2AllowanceReadParams as g };

dist/esm/chunk-DSSJHWGT.mjs

+// src/exact/v1/client/scheme.ts
+import { getAddress } from "viem";
+
+// src/constants.ts
+var authorizationTypes = {
+  TransferWithAuthorization: [
+    { name: "from", type: "address" },
+    { name: "to", type: "address" },
+    { name: "value", type: "uint256" },
+    { name: "validAfter", type: "uint256" },
+    { name: "validBefore", type: "uint256" },
+    { name: "nonce", type: "bytes32" }
+  ]
+};
+var permit2WitnessTypes = {
+  PermitWitnessTransferFrom: [
+    { name: "permitted", type: "TokenPermissions" },
+    { name: "spender", type: "address" },
+    { name: "nonce", type: "uint256" },
+    { name: "deadline", type: "uint256" },
+    { name: "witness", type: "Witness" }
+  ],
+  TokenPermissions: [
+    { name: "token", type: "address" },
+    { name: "amount", type: "uint256" }
+  ],
+  Witness: [
+    { name: "to", type: "address" },
+    { name: "validAfter", type: "uint256" },
+    { name: "extra", type: "bytes" }
+  ]
+};
+var eip3009ABI = [
+  {
+    inputs: [
+      { name: "from", type: "address" },
+      { name: "to", type: "address" },
+      { name: "value", type: "uint256" },
+      { name: "validAfter", type: "uint256" },
+      { name: "validBefore", type: "uint256" },
+      { name: "nonce", type: "bytes32" },
+      { name: "v", type: "uint8" },
+      { name: "r", type: "bytes32" },
+      { name: "s", type: "bytes32" }
+    ],
+    name: "transferWithAuthorization",
+    outputs: [],
+    stateMutability: "nonpayable",
+    type: "function"
+  },
+  {
+    inputs: [
+      { name: "from", type: "address" },
+      { name: "to", type: "address" },
+      { name: "value", type: "uint256" },
+      { name: "validAfter", type: "uint256" },
+      { name: "validBefore", type: "uint256" },
+      { name: "nonce", type: "bytes32" },
+      { name: "signature", type: "bytes" }
+    ],
+    name: "transferWithAuthorization",
+    outputs: [],
+    stateMutability: "nonpayable",
+    type: "function"
+  },
+  {
+    inputs: [{ name: "account", type: "address" }],
+    name: "balanceOf",
+    outputs: [{ name: "", type: "uint256" }],
+    stateMutability: "view",
+    type: "function"
+  },
+  {
+    inputs: [],
+    name: "version",
+    outputs: [{ name: "", type: "string" }],
+    stateMutability: "view",
+    type: "function"
+  }
+];
+var PERMIT2_ADDRESS = "0x000000000022D473030F116dDEE9F6B43aC78BA3";
+var x402ExactPermit2ProxyAddress = "0x4020615294c913F045dc10f0a5cdEbd86c280001";
+var x402UptoPermit2ProxyAddress = "0x4020633461b2895a48930Ff97eE8fCdE8E520002";
+var x402ExactPermit2ProxyABI = [
+  {
+    type: "function",
+    name: "PERMIT2",
+    inputs: [],
+    outputs: [{ name: "", type: "address", internalType: "contract ISignatureTransfer" }],
+    stateMutability: "view"
+  },
+  {
+    type: "function",
+    name: "WITNESS_TYPEHASH",
+    inputs: [],
+    outputs: [{ name: "", type: "bytes32", internalType: "bytes32" }],
+    stateMutability: "view"
+  },
+  {
+    type: "function",
+    name: "WITNESS_TYPE_STRING",
+    inputs: [],
+    outputs: [{ name: "", type: "string", internalType: "string" }],
+    stateMutability: "view"
+  },
+  {
+    type: "function",
+    name: "initialize",
+    inputs: [{ name: "_permit2", type: "address", internalType: "address" }],
+    outputs: [],
+    stateMutability: "nonpayable"
+  },
+  {
+    type: "function",
+    name: "settle",
+    inputs: [
+      {
+        name: "permit",
+        type: "tuple",
+        internalType: "struct ISignatureTransfer.PermitTransferFrom",
+        components: [
+          {
+            name: "permitted",
+            type: "tuple",
+            internalType: "struct ISignatureTransfer.TokenPermissions",
+            components: [
+              { name: "token", type: "address", internalType: "address" },
+              { name: "amount", type: "uint256", internalType: "uint256" }
+            ]
+          },
+          { name: "nonce", type: "uint256", internalType: "uint256" },
+          { name: "deadline", type: "uint256", internalType: "uint256" }
+        ]
+      },
+      { name: "owner", type: "address", internalType: "address" },
+      {
+        name: "witness",
+        type: "tuple",
+        internalType: "struct x402BasePermit2Proxy.Witness",
+        components: [
+          { name: "to", type: "address", internalType: "address" },
+          { name: "validAfter", type: "uint256", internalType: "uint256" },
+          { name: "extra", type: "bytes", internalType: "bytes" }
+        ]
+      },
+      { name: "signature", type: "bytes", internalType: "bytes" }
+    ],
+    outputs: [],
+    stateMutability: "nonpayable"
+  },
+  {
+    type: "function",
+    name: "settleWithPermit",
+    inputs: [
+      {
+        name: "permit2612",
+        type: "tuple",
+        internalType: "struct x402BasePermit2Proxy.EIP2612Permit",
+        components: [
+          { name: "value", type: "uint256", internalType: "uint256" },
+          { name: "deadline", type: "uint256", internalType: "uint256" },
+          { name: "r", type: "bytes32", internalType: "bytes32" },
+          { name: "s", type: "bytes32", internalType: "bytes32" },
+          { name: "v", type: "uint8", internalType: "uint8" }
+        ]
+      },
+      {
+        name: "permit",
+        type: "tuple",
+        internalType: "struct ISignatureTransfer.PermitTransferFrom",
+        components: [
+          {
+            name: "permitted",
+            type: "tuple",
+            internalType: "struct ISignatureTransfer.TokenPermissions",
+            components: [
+              { name: "token", type: "address", internalType: "address" },
+              { name: "amount", type: "uint256", internalType: "uint256" }
+            ]
+          },
+          { name: "nonce", type: "uint256", internalType: "uint256" },
+          { name: "deadline", type: "uint256", internalType: "uint256" }
+        ]
+      },
+      { name: "owner", type: "address", internalType: "address" },
+      {
+        name: "witness",
+        type: "tuple",
+        internalType: "struct x402BasePermit2Proxy.Witness",
+        components: [
+          { name: "to", type: "address", internalType: "address" },
+          { name: "validAfter", type: "uint256", internalType: "uint256" },
+          { name: "extra", type: "bytes", internalType: "bytes" }
+        ]
+      },
+      { name: "signature", type: "bytes", internalType: "bytes" }
+    ],
+    outputs: [],
+    stateMutability: "nonpayable"
+  },
+  { type: "event", name: "Settled", inputs: [], anonymous: false },
+  { type: "event", name: "SettledWithPermit", inputs: [], anonymous: false },
+  { type: "error", name: "AlreadyInitialized", inputs: [] },
+  { type: "error", name: "InvalidDestination", inputs: [] },
+  { type: "error", name: "InvalidOwner", inputs: [] },
+  { type: "error", name: "InvalidPermit2Address", inputs: [] },
+  { type: "error", name: "PaymentTooEarly", inputs: [] },
+  { type: "error", name: "ReentrancyGuardReentrantCall", inputs: [] }
+];
+
+// src/utils.ts
+import { toHex } from "viem";
+function getEvmChainId(network) {
+  const chainId = EVM_NETWORK_CHAIN_ID_MAP[network];
+  if (!chainId) {
+    throw new Error(`Unsupported network: ${network}`);
+  }
+  return chainId;
+}
+function getCrypto() {
+  const cryptoObj = globalThis.crypto;
+  if (!cryptoObj) {
+    throw new Error("Crypto API not available");
+  }
+  return cryptoObj;
+}
+function createNonce() {
+  return toHex(getCrypto().getRandomValues(new Uint8Array(32)));
+}
+function createPermit2Nonce() {
+  const randomBytes = getCrypto().getRandomValues(new Uint8Array(32));
+  return BigInt(toHex(randomBytes)).toString();
+}
+
+// src/exact/v1/client/scheme.ts
+var ExactEvmSchemeV1 = class {
+  /**
+   * Creates a new ExactEvmClientV1 instance.
+   *
+   * @param signer - The EVM signer for client operations
+   */
+  constructor(signer) {
+    this.signer = signer;
+    this.scheme = "exact";
+  }
+  /**
+   * Creates a payment payload for the Exact scheme (V1).
+   *
+   * @param x402Version - The x402 protocol version
+   * @param paymentRequirements - The payment requirements
+   * @returns Promise resolving to a payment payload
+   */
+  async createPaymentPayload(x402Version, paymentRequirements) {
+    const selectedV1 = paymentRequirements;
+    const nonce = createNonce();
+    const now = Math.floor(Date.now() / 1e3);
+    const authorization = {
+      from: this.signer.address,
+      to: getAddress(selectedV1.payTo),
+      value: selectedV1.maxAmountRequired,
+      validAfter: (now - 600).toString(),
+      // 10 minutes before
+      validBefore: (now + selectedV1.maxTimeoutSeconds).toString(),
+      nonce
+    };
+    const signature = await this.signAuthorization(authorization, selectedV1);
+    const payload = {
+      authorization,
+      signature
+    };
+    return {
+      x402Version,
+      scheme: selectedV1.scheme,
+      network: selectedV1.network,
+      payload
+    };
+  }
+  /**
+   * Sign the EIP-3009 authorization using EIP-712
+   *
+   * @param authorization - The authorization to sign
+   * @param requirements - The payment requirements
+   * @returns Promise resolving to the signature
+   */
+  async signAuthorization(authorization, requirements) {
+    const chainId = getEvmChainId(requirements.network);
+    if (!requirements.extra?.name || !requirements.extra?.version) {
+      throw new Error(
+        `EIP-712 domain parameters (name, version) are required in payment requirements for asset ${requirements.asset}`
+      );
+    }
+    const { name, version } = requirements.extra;
+    const domain = {
+      name,
+      version,
+      chainId,
+      verifyingContract: getAddress(requirements.asset)
+    };
+    const message = {
+      from: getAddress(authorization.from),
+      to: getAddress(authorization.to),
+      value: BigInt(authorization.value),
+      validAfter: BigInt(authorization.validAfter),
+      validBefore: BigInt(authorization.validBefore),
+      nonce: authorization.nonce
+    };
+    return await this.signer.signTypedData({
+      domain,
+      types: authorizationTypes,
+      primaryType: "TransferWithAuthorization",
+      message
+    });
+  }
+};
+
+// src/exact/v1/facilitator/scheme.ts
+import { getAddress as getAddress2, isAddressEqual, parseErc6492Signature, parseSignature } from "viem";
+var ExactEvmSchemeV12 = class {
+  /**
+   * Creates a new ExactEvmFacilitatorV1 instance.
+   *
+   * @param signer - The EVM signer for facilitator operations
+   * @param config - Optional configuration for the facilitator
+   */
+  constructor(signer, config) {
+    this.signer = signer;
+    this.scheme = "exact";
+    this.caipFamily = "eip155:*";
+    this.config = {
+      deployERC4337WithEIP6492: config?.deployERC4337WithEIP6492 ?? false
+    };
+  }
+  /**
+   * Get mechanism-specific extra data for the supported kinds endpoint.
+   * For EVM, no extra data is needed.
+   *
+   * @param _ - The network identifier (unused for EVM)
+   * @returns undefined (EVM has no extra data)
+   */
+  getExtra(_) {
+    return void 0;
+  }
+  /**
+   * Get signer addresses used by this facilitator.
+   * Returns all addresses this facilitator can use for signing/settling transactions.
+   *
+   * @param _ - The network identifier (unused for EVM, addresses are network-agnostic)
+   * @returns Array of facilitator wallet addresses
+   */
+  getSigners(_) {
+    return [...this.signer.getAddresses()];
+  }
+  /**
+   * Verifies a payment payload (V1).
+   *
+   * @param payload - The payment payload to verify
+   * @param requirements - The payment requirements
+   * @returns Promise resolving to verification response
+   */
+  async verify(payload, requirements) {
+    const requirementsV1 = requirements;
+    const payloadV1 = payload;
+    const exactEvmPayload = payload.payload;
+    if (payloadV1.scheme !== "exact" || requirements.scheme !== "exact") {
+      return {
+        isValid: false,
+        invalidReason: "unsupported_scheme",
+        payer: exactEvmPayload.authorization.from
+      };
+    }
+    let chainId;
+    try {
+      chainId = getEvmChainId(payloadV1.network);
+    } catch {
+      return {
+        isValid: false,
+        invalidReason: `invalid_network`,
+        payer: exactEvmPayload.authorization.from
+      };
+    }
+    if (!requirements.extra?.name || !requirements.extra?.version) {
+      return {
+        isValid: false,
+        invalidReason: "missing_eip712_domain",
+        payer: exactEvmPayload.authorization.from
+      };
+    }
+    const { name, version } = requirements.extra;
+    const erc20Address = getAddress2(requirements.asset);
+    if (payloadV1.network !== requirements.network) {
+      return {
+        isValid: false,
+        invalidReason: "network_mismatch",
+        payer: exactEvmPayload.authorization.from
+      };
+    }
+    const permitTypedData = {
+      types: authorizationTypes,
+      primaryType: "TransferWithAuthorization",
+      domain: {
+        name,
+        version,
+        chainId,
+        verifyingContract: erc20Address
+      },
+      message: {
+        from: exactEvmPayload.authorization.from,
+        to: exactEvmPayload.authorization.to,
+        value: BigInt(exactEvmPayload.authorization.value),
+        validAfter: BigInt(exactEvmPayload.authorization.validAfter),
+        validBefore: BigInt(exactEvmPayload.authorization.validBefore),
+        nonce: exactEvmPayload.authorization.nonce
+      }
+    };
+    try {
+      const recoveredAddress = await this.signer.verifyTypedData({
+        address: exactEvmPayload.authorization.from,
+        ...permitTypedData,
+        signature: exactEvmPayload.signature
+      });
+      if (!recoveredAddress) {
+        return {
+          isValid: false,
+          invalidReason: "invalid_exact_evm_payload_signature",
+          payer: exactEvmPayload.authorization.from
+        };
+      }
+    } catch {
+      const signature = exactEvmPayload.signature;
+      const signatureLength = signature.startsWith("0x") ? signature.length - 2 : signature.length;
+      const isSmartWallet = signatureLength > 130;
+      if (isSmartWallet) {
+        const payerAddress = exactEvmPayload.authorization.from;
+        const bytecode = await this.signer.getCode({ address: payerAddress });
+        if (!bytecode || bytecode === "0x") {
+          const erc6492Data = parseErc6492Signature(signature);
+          const hasDeploymentInfo = erc6492Data.address && erc6492Data.data && !isAddressEqual(erc6492Data.address, "0x0000000000000000000000000000000000000000");
+          if (!hasDeploymentInfo) {
+            return {
+              isValid: false,
+              invalidReason: "invalid_exact_evm_payload_undeployed_smart_wallet",
+              payer: payerAddress
+            };
+          }
+        } else {
+          return {
+            isValid: false,
+            invalidReason: "invalid_exact_evm_payload_signature",
+            payer: exactEvmPayload.authorization.from
+          };
+        }
+      } else {
+        return {
+          isValid: false,
+          invalidReason: "invalid_exact_evm_payload_signature",
+          payer: exactEvmPayload.authorization.from
+        };
+      }
+    }
+    if (getAddress2(exactEvmPayload.authorization.to) !== getAddress2(requirements.payTo)) {
+      return {
+        isValid: false,
+        invalidReason: "invalid_exact_evm_payload_recipient_mismatch",
+        payer: exactEvmPayload.authorization.from
+      };
+    }
+    const now = Math.floor(Date.now() / 1e3);
+    if (BigInt(exactEvmPayload.authorization.validBefore) < BigInt(now + 6)) {
+      return {
+        isValid: false,
+        invalidReason: "invalid_exact_evm_payload_authorization_valid_before",
+        payer: exactEvmPayload.authorization.from
+      };
+    }
+    if (BigInt(exactEvmPayload.authorization.validAfter) > BigInt(now)) {
+      return {
+        isValid: false,
+        invalidReason: "invalid_exact_evm_payload_authorization_valid_after",
+        payer: exactEvmPayload.authorization.from
+      };
+    }
+    try {
+      const balance = await this.signer.readContract({
+        address: erc20Address,
+        abi: eip3009ABI,
+        functionName: "balanceOf",
+        args: [exactEvmPayload.authorization.from]
+      });
+      if (BigInt(balance) < BigInt(requirementsV1.maxAmountRequired)) {
+        return {
+          isValid: false,
+          invalidReason: "insufficient_funds",
+          invalidMessage: `Insufficient funds to complete the payment. Required: ${requirementsV1.maxAmountRequired} ${requirements.asset}, Available: ${balance.toString()} ${requirements.asset}. Please add funds to your wallet and try again.`,
+          payer: exactEvmPayload.authorization.from
+        };
+      }
+    } catch {
+    }
+    if (BigInt(exactEvmPayload.authorization.value) < BigInt(requirementsV1.maxAmountRequired)) {
+      return {
+        isValid: false,
+        invalidReason: "invalid_exact_evm_payload_authorization_value",
+        payer: exactEvmPayload.authorization.from
+      };
+    }
+    return {
+      isValid: true,
+      invalidReason: void 0,
+      payer: exactEvmPayload.authorization.from
+    };
+  }
+  /**
+   * Settles a payment by executing the transfer (V1).
+   *
+   * @param payload - The payment payload to settle
+   * @param requirements - The payment requirements
+   * @returns Promise resolving to settlement response
+   */
+  async settle(payload, requirements) {
+    const payloadV1 = payload;
+    const exactEvmPayload = payload.payload;
+    const valid = await this.verify(payload, requirements);
+    if (!valid.isValid) {
+      return {
+        success: false,
+        network: payloadV1.network,
+        transaction: "",
+        errorReason: valid.invalidReason ?? "invalid_scheme",
+        payer: exactEvmPayload.authorization.from
+      };
+    }
+    try {
+      const parseResult = parseErc6492Signature(exactEvmPayload.signature);
+      const { signature, address: factoryAddress, data: factoryCalldata } = parseResult;
+      if (this.config.deployERC4337WithEIP6492 && factoryAddress && factoryCalldata && !isAddressEqual(factoryAddress, "0x0000000000000000000000000000000000000000")) {
+        const payerAddress = exactEvmPayload.authorization.from;
+        const bytecode = await this.signer.getCode({ address: payerAddress });
+        if (!bytecode || bytecode === "0x") {
+          try {
+            console.log(`Deploying ERC-4337 smart wallet for ${payerAddress} via EIP-6492`);
+            const deployTx = await this.signer.sendTransaction({
+              to: factoryAddress,
+              data: factoryCalldata
+            });
+            await this.signer.waitForTransactionReceipt({ hash: deployTx });
+            console.log(`Successfully deployed smart wallet for ${payerAddress}`);
+          } catch (deployError) {
+            console.error("Smart wallet deployment failed:", deployError);
+            throw deployError;
+          }
+        } else {
+          console.log(`Smart wallet for ${payerAddress} already deployed, skipping deployment`);
+        }
+      }
+      const signatureLength = signature.startsWith("0x") ? signature.length - 2 : signature.length;
+      const isECDSA = signatureLength === 130;
+      let tx;
+      if (isECDSA) {
+        const parsedSig = parseSignature(signature);
+        tx = await this.signer.writeContract({
+          address: getAddress2(requirements.asset),
+          abi: eip3009ABI,
+          functionName: "transferWithAuthorization",
+          args: [
+            getAddress2(exactEvmPayload.authorization.from),
+            getAddress2(exactEvmPayload.authorization.to),
+            BigInt(exactEvmPayload.authorization.value),
+            BigInt(exactEvmPayload.authorization.validAfter),
+            BigInt(exactEvmPayload.authorization.validBefore),
+            exactEvmPayload.authorization.nonce,
+            parsedSig.v || parsedSig.yParity,
+            parsedSig.r,
+            parsedSig.s
+          ]
+        });
+      } else {
+        tx = await this.signer.writeContract({
+          address: getAddress2(requirements.asset),
+          abi: eip3009ABI,
+          functionName: "transferWithAuthorization",
+          args: [
+            getAddress2(exactEvmPayload.authorization.from),
+            getAddress2(exactEvmPayload.authorization.to),
+            BigInt(exactEvmPayload.authorization.value),
+            BigInt(exactEvmPayload.authorization.validAfter),
+            BigInt(exactEvmPayload.authorization.validBefore),
+            exactEvmPayload.authorization.nonce,
+            signature
+          ]
+        });
+      }
+      const receipt = await this.signer.waitForTransactionReceipt({ hash: tx });
+      if (receipt.status !== "success") {
+        return {
+          success: false,
+          errorReason: "invalid_transaction_state",
+          transaction: tx,
+          network: payloadV1.network,
+          payer: exactEvmPayload.authorization.from
+        };
+      }
+      return {
+        success: true,
+        transaction: tx,
+        network: payloadV1.network,
+        payer: exactEvmPayload.authorization.from
+      };
+    } catch (error) {
+      console.error("Failed to settle transaction:", error);
+      return {
+        success: false,
+        errorReason: "transaction_failed",
+        transaction: "",
+        network: payloadV1.network,
+        payer: exactEvmPayload.authorization.from
+      };
+    }
+  }
+};
+
+// src/v1/index.ts
+var EVM_NETWORK_CHAIN_ID_MAP = {
+  ethereum: 1,
+  sepolia: 11155111,
+  abstract: 2741,
+  "abstract-testnet": 11124,
+  "base-sepolia": 84532,
+  base: 8453,
+  "avalanche-fuji": 43113,
+  avalanche: 43114,
+  iotex: 4689,
+  sei: 1329,
+  "sei-testnet": 1328,
+  polygon: 137,
+  "polygon-amoy": 80002,
+  peaq: 3338,
+  story: 1514,
+  educhain: 41923,
+  "skale-base-sepolia": 324705682
+};
+var NETWORKS = Object.keys(EVM_NETWORK_CHAIN_ID_MAP);
+
+export {
+  authorizationTypes,
+  permit2WitnessTypes,
+  eip3009ABI,
+  PERMIT2_ADDRESS,
+  x402ExactPermit2ProxyAddress,
+  x402UptoPermit2ProxyAddress,
+  x402ExactPermit2ProxyABI,
+  ExactEvmSchemeV1,
+  ExactEvmSchemeV12,
+  EVM_NETWORK_CHAIN_ID_MAP,
+  NETWORKS,
+  createNonce,
+  createPermit2Nonce
+};
+//# sourceMappingURL=chunk-DSSJHWGT.mjs.map

dist/esm/chunk-DSSJHWGT.mjs.map

+{"version":3,"sources":["../../src/exact/v1/client/scheme.ts","../../src/constants.ts","../../src/utils.ts","../../src/exact/v1/facilitator/scheme.ts","../../src/v1/index.ts"],"sourcesContent":["import {\n  Network,\n  PaymentPayload,\n  PaymentRequirements,\n  SchemeNetworkClient,\n} from \"@x402/core/types\";\nimport { PaymentRequirementsV1 } from \"@x402/core/types/v1\";\nimport { getAddress } from \"viem\";\nimport { authorizationTypes } from \"../../../constants\";\nimport { ClientEvmSigner } from \"../../../signer\";\nimport { ExactEvmPayloadV1 } from \"../../../types\";\nimport { createNonce, getEvmChainId } from \"../../../utils\";\nimport { EvmNetworkV1 } from \"../../../v1\";\n\n/**\n * EVM client implementation for the Exact payment scheme (V1).\n */\nexport class ExactEvmSchemeV1 implements SchemeNetworkClient {\n  readonly scheme = \"exact\";\n\n  /**\n   * Creates a new ExactEvmClientV1 instance.\n   *\n   * @param signer - The EVM signer for client operations\n   */\n  constructor(private readonly signer: ClientEvmSigner) {}\n\n  /**\n   * Creates a payment payload for the Exact scheme (V1).\n   *\n   * @param x402Version - The x402 protocol version\n   * @param paymentRequirements - The payment requirements\n   * @returns Promise resolving to a payment payload\n   */\n  async createPaymentPayload(\n    x402Version: number,\n    paymentRequirements: PaymentRequirements,\n  ): Promise<\n    Pick<PaymentPayload, \"x402Version\" | \"payload\"> & { scheme: string; network: Network }\n  > {\n    const selectedV1 = paymentRequirements as unknown as PaymentRequirementsV1;\n    const nonce = createNonce();\n    const now = Math.floor(Date.now() / 1000);\n\n    const authorization: ExactEvmPayloadV1[\"authorization\"] = {\n      from: this.signer.address,\n      to: getAddress(selectedV1.payTo),\n      value: selectedV1.maxAmountRequired,\n      validAfter: (now - 600).toString(), // 10 minutes before\n      validBefore: (now + selectedV1.maxTimeoutSeconds).toString(),\n      nonce,\n    };\n\n    // Sign the authorization\n    const signature = await this.signAuthorization(authorization, selectedV1);\n\n    const payload: ExactEvmPayloadV1 = {\n      authorization,\n      signature,\n    };\n\n    return {\n      x402Version,\n      scheme: selectedV1.scheme,\n      network: selectedV1.network,\n      payload,\n    };\n  }\n\n  /**\n   * Sign the EIP-3009 authorization using EIP-712\n   *\n   * @param authorization - The authorization to sign\n   * @param requirements - The payment requirements\n   * @returns Promise resolving to the signature\n   */\n  private async signAuthorization(\n    authorization: ExactEvmPayloadV1[\"authorization\"],\n    requirements: PaymentRequirementsV1,\n  ): Promise<`0x${string}`> {\n    const chainId = getEvmChainId(requirements.network as EvmNetworkV1);\n\n    if (!requirements.extra?.name || !requirements.extra?.version) {\n      throw new Error(\n        `EIP-712 domain parameters (name, version) are required in payment requirements for asset ${requirements.asset}`,\n      );\n    }\n\n    const { name, version } = requirements.extra;\n\n    const domain = {\n      name,\n      version,\n      chainId,\n      verifyingContract: getAddress(requirements.asset),\n    };\n\n    const message = {\n      from: getAddress(authorization.from),\n      to: getAddress(authorization.to),\n      value: BigInt(authorization.value),\n      validAfter: BigInt(authorization.validAfter),\n      validBefore: BigInt(authorization.validBefore),\n      nonce: authorization.nonce,\n    };\n\n    return await this.signer.signTypedData({\n      domain,\n      types: authorizationTypes,\n      primaryType: \"TransferWithAuthorization\",\n      message,\n    });\n  }\n}\n","// EIP-3009 TransferWithAuthorization types for EIP-712 signing\nexport const authorizationTypes = {\n  TransferWithAuthorization: [\n    { name: \"from\", type: \"address\" },\n    { name: \"to\", type: \"address\" },\n    { name: \"value\", type: \"uint256\" },\n    { name: \"validAfter\", type: \"uint256\" },\n    { name: \"validBefore\", type: \"uint256\" },\n    { name: \"nonce\", type: \"bytes32\" },\n  ],\n} as const;\n\n/**\n * Permit2 EIP-712 types for signing PermitWitnessTransferFrom.\n * Must match the exact format expected by the Permit2 contract.\n * Note: Types must be in ALPHABETICAL order after the primary type (TokenPermissions < Witness).\n */\nexport const permit2WitnessTypes = {\n  PermitWitnessTransferFrom: [\n    { name: \"permitted\", type: \"TokenPermissions\" },\n    { name: \"spender\", type: \"address\" },\n    { name: \"nonce\", type: \"uint256\" },\n    { name: \"deadline\", type: \"uint256\" },\n    { name: \"witness\", type: \"Witness\" },\n  ],\n  TokenPermissions: [\n    { name: \"token\", type: \"address\" },\n    { name: \"amount\", type: \"uint256\" },\n  ],\n  Witness: [\n    { name: \"to\", type: \"address\" },\n    { name: \"validAfter\", type: \"uint256\" },\n    { name: \"extra\", type: \"bytes\" },\n  ],\n} as const;\n\n// EIP3009 ABI for transferWithAuthorization function\nexport const eip3009ABI = [\n  {\n    inputs: [\n      { name: \"from\", type: \"address\" },\n      { name: \"to\", type: \"address\" },\n      { name: \"value\", type: \"uint256\" },\n      { name: \"validAfter\", type: \"uint256\" },\n      { name: \"validBefore\", type: \"uint256\" },\n      { name: \"nonce\", type: \"bytes32\" },\n      { name: \"v\", type: \"uint8\" },\n      { name: \"r\", type: \"bytes32\" },\n      { name: \"s\", type: \"bytes32\" },\n    ],\n    name: \"transferWithAuthorization\",\n    outputs: [],\n    stateMutability: \"nonpayable\",\n    type: \"function\",\n  },\n  {\n    inputs: [\n      { name: \"from\", type: \"address\" },\n      { name: \"to\", type: \"address\" },\n      { name: \"value\", type: \"uint256\" },\n      { name: \"validAfter\", type: \"uint256\" },\n      { name: \"validBefore\", type: \"uint256\" },\n      { name: \"nonce\", type: \"bytes32\" },\n      { name: \"signature\", type: \"bytes\" },\n    ],\n    name: \"transferWithAuthorization\",\n    outputs: [],\n    stateMutability: \"nonpayable\",\n    type: \"function\",\n  },\n  {\n    inputs: [{ name: \"account\", type: \"address\" }],\n    name: \"balanceOf\",\n    outputs: [{ name: \"\", type: \"uint256\" }],\n    stateMutability: \"view\",\n    type: \"function\",\n  },\n  {\n    inputs: [],\n    name: \"version\",\n    outputs: [{ name: \"\", type: \"string\" }],\n    stateMutability: \"view\",\n    type: \"function\",\n  },\n] as const;\n\n/**\n * Canonical Permit2 contract address.\n * Same address on all EVM chains via CREATE2 deployment.\n *\n * @see https://github.com/Uniswap/permit2\n */\nexport const PERMIT2_ADDRESS = \"0x000000000022D473030F116dDEE9F6B43aC78BA3\" as const;\n\n/**\n * x402ExactPermit2Proxy contract address.\n * Vanity address: 0x4020...0001 for easy recognition.\n * This address is deterministic based on:\n * - Arachnid's deterministic deployer (0x4e59b44847b379578588920cA78FbF26c0B4956C)\n * - Vanity-mined salt for prefix 0x4020 and suffix 0001\n * - Contract bytecode + constructor args (PERMIT2_ADDRESS)\n */\nexport const x402ExactPermit2ProxyAddress = \"0x4020615294c913F045dc10f0a5cdEbd86c280001\" as const;\n\n/**\n * x402UptoPermit2Proxy contract address.\n * Vanity address: 0x4020...0002 for easy recognition.\n * This address is deterministic based on:\n * - Arachnid's deterministic deployer (0x4e59b44847b379578588920cA78FbF26c0B4956C)\n * - Vanity-mined salt for prefix 0x4020 and suffix 0002\n * - Contract bytecode + constructor args (PERMIT2_ADDRESS)\n */\nexport const x402UptoPermit2ProxyAddress = \"0x4020633461b2895a48930Ff97eE8fCdE8E520002\" as const;\n\n/**\n * x402UptoPermit2Proxy ABI - settle function for upto payment scheme (variable amounts).\n */\nexport const x402UptoPermit2ProxyABI = [\n  {\n    type: \"function\",\n    name: \"PERMIT2\",\n    inputs: [],\n    outputs: [{ name: \"\", type: \"address\", internalType: \"contract ISignatureTransfer\" }],\n    stateMutability: \"view\",\n  },\n  {\n    type: \"function\",\n    name: \"WITNESS_TYPEHASH\",\n    inputs: [],\n    outputs: [{ name: \"\", type: \"bytes32\", internalType: \"bytes32\" }],\n    stateMutability: \"view\",\n  },\n  {\n    type: \"function\",\n    name: \"WITNESS_TYPE_STRING\",\n    inputs: [],\n    outputs: [{ name: \"\", type: \"string\", internalType: \"string\" }],\n    stateMutability: \"view\",\n  },\n  {\n    type: \"function\",\n    name: \"initialize\",\n    inputs: [{ name: \"_permit2\", type: \"address\", internalType: \"address\" }],\n    outputs: [],\n    stateMutability: \"nonpayable\",\n  },\n  {\n    type: \"function\",\n    name: \"settle\",\n    inputs: [\n      {\n        name: \"permit\",\n        type: \"tuple\",\n        internalType: \"struct ISignatureTransfer.PermitTransferFrom\",\n        components: [\n          {\n            name: \"permitted\",\n            type: \"tuple\",\n            internalType: \"struct ISignatureTransfer.TokenPermissions\",\n            components: [\n              { name: \"token\", type: \"address\", internalType: \"address\" },\n              { name: \"amount\", type: \"uint256\", internalType: \"uint256\" },\n            ],\n          },\n          { name: \"nonce\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"deadline\", type: \"uint256\", internalType: \"uint256\" },\n        ],\n      },\n      { name: \"owner\", type: \"address\", internalType: \"address\" },\n      {\n        name: \"witness\",\n        type: \"tuple\",\n        internalType: \"struct x402BasePermit2Proxy.Witness\",\n        components: [\n          { name: \"to\", type: \"address\", internalType: \"address\" },\n          { name: \"validAfter\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"extra\", type: \"bytes\", internalType: \"bytes\" },\n        ],\n      },\n      { name: \"signature\", type: \"bytes\", internalType: \"bytes\" },\n    ],\n    outputs: [],\n    stateMutability: \"nonpayable\",\n  },\n  {\n    type: \"function\",\n    name: \"settleWithPermit\",\n    inputs: [\n      {\n        name: \"permit2612\",\n        type: \"tuple\",\n        internalType: \"struct x402BasePermit2Proxy.EIP2612Permit\",\n        components: [\n          { name: \"value\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"deadline\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"r\", type: \"bytes32\", internalType: \"bytes32\" },\n          { name: \"s\", type: \"bytes32\", internalType: \"bytes32\" },\n          { name: \"v\", type: \"uint8\", internalType: \"uint8\" },\n        ],\n      },\n      {\n        name: \"permit\",\n        type: \"tuple\",\n        internalType: \"struct ISignatureTransfer.PermitTransferFrom\",\n        components: [\n          {\n            name: \"permitted\",\n            type: \"tuple\",\n            internalType: \"struct ISignatureTransfer.TokenPermissions\",\n            components: [\n              { name: \"token\", type: \"address\", internalType: \"address\" },\n              { name: \"amount\", type: \"uint256\", internalType: \"uint256\" },\n            ],\n          },\n          { name: \"nonce\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"deadline\", type: \"uint256\", internalType: \"uint256\" },\n        ],\n      },\n      { name: \"owner\", type: \"address\", internalType: \"address\" },\n      {\n        name: \"witness\",\n        type: \"tuple\",\n        internalType: \"struct x402BasePermit2Proxy.Witness\",\n        components: [\n          { name: \"to\", type: \"address\", internalType: \"address\" },\n          { name: \"validAfter\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"extra\", type: \"bytes\", internalType: \"bytes\" },\n        ],\n      },\n      { name: \"signature\", type: \"bytes\", internalType: \"bytes\" },\n    ],\n    outputs: [],\n    stateMutability: \"nonpayable\",\n  },\n  { type: \"event\", name: \"Settled\", inputs: [], anonymous: false },\n  { type: \"event\", name: \"SettledWithPermit\", inputs: [], anonymous: false },\n  { type: \"error\", name: \"AlreadyInitialized\", inputs: [] },\n  { type: \"error\", name: \"AmountExceedsPermitted\", inputs: [] },\n  { type: \"error\", name: \"InvalidDestination\", inputs: [] },\n  { type: \"error\", name: \"InvalidOwner\", inputs: [] },\n  { type: \"error\", name: \"InvalidPermit2Address\", inputs: [] },\n  { type: \"error\", name: \"PaymentTooEarly\", inputs: [] },\n  { type: \"error\", name: \"ReentrancyGuardReentrantCall\", inputs: [] },\n] as const;\n\n/**\n * x402ExactPermit2Proxy ABI - settle function for exact payment scheme.\n */\nexport const x402ExactPermit2ProxyABI = [\n  {\n    type: \"function\",\n    name: \"PERMIT2\",\n    inputs: [],\n    outputs: [{ name: \"\", type: \"address\", internalType: \"contract ISignatureTransfer\" }],\n    stateMutability: \"view\",\n  },\n  {\n    type: \"function\",\n    name: \"WITNESS_TYPEHASH\",\n    inputs: [],\n    outputs: [{ name: \"\", type: \"bytes32\", internalType: \"bytes32\" }],\n    stateMutability: \"view\",\n  },\n  {\n    type: \"function\",\n    name: \"WITNESS_TYPE_STRING\",\n    inputs: [],\n    outputs: [{ name: \"\", type: \"string\", internalType: \"string\" }],\n    stateMutability: \"view\",\n  },\n  {\n    type: \"function\",\n    name: \"initialize\",\n    inputs: [{ name: \"_permit2\", type: \"address\", internalType: \"address\" }],\n    outputs: [],\n    stateMutability: \"nonpayable\",\n  },\n  {\n    type: \"function\",\n    name: \"settle\",\n    inputs: [\n      {\n        name: \"permit\",\n        type: \"tuple\",\n        internalType: \"struct ISignatureTransfer.PermitTransferFrom\",\n        components: [\n          {\n            name: \"permitted\",\n            type: \"tuple\",\n            internalType: \"struct ISignatureTransfer.TokenPermissions\",\n            components: [\n              { name: \"token\", type: \"address\", internalType: \"address\" },\n              { name: \"amount\", type: \"uint256\", internalType: \"uint256\" },\n            ],\n          },\n          { name: \"nonce\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"deadline\", type: \"uint256\", internalType: \"uint256\" },\n        ],\n      },\n      { name: \"owner\", type: \"address\", internalType: \"address\" },\n      {\n        name: \"witness\",\n        type: \"tuple\",\n        internalType: \"struct x402BasePermit2Proxy.Witness\",\n        components: [\n          { name: \"to\", type: \"address\", internalType: \"address\" },\n          { name: \"validAfter\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"extra\", type: \"bytes\", internalType: \"bytes\" },\n        ],\n      },\n      { name: \"signature\", type: \"bytes\", internalType: \"bytes\" },\n    ],\n    outputs: [],\n    stateMutability: \"nonpayable\",\n  },\n  {\n    type: \"function\",\n    name: \"settleWithPermit\",\n    inputs: [\n      {\n        name: \"permit2612\",\n        type: \"tuple\",\n        internalType: \"struct x402BasePermit2Proxy.EIP2612Permit\",\n        components: [\n          { name: \"value\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"deadline\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"r\", type: \"bytes32\", internalType: \"bytes32\" },\n          { name: \"s\", type: \"bytes32\", internalType: \"bytes32\" },\n          { name: \"v\", type: \"uint8\", internalType: \"uint8\" },\n        ],\n      },\n      {\n        name: \"permit\",\n        type: \"tuple\",\n        internalType: \"struct ISignatureTransfer.PermitTransferFrom\",\n        components: [\n          {\n            name: \"permitted\",\n            type: \"tuple\",\n            internalType: \"struct ISignatureTransfer.TokenPermissions\",\n            components: [\n              { name: \"token\", type: \"address\", internalType: \"address\" },\n              { name: \"amount\", type: \"uint256\", internalType: \"uint256\" },\n            ],\n          },\n          { name: \"nonce\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"deadline\", type: \"uint256\", internalType: \"uint256\" },\n        ],\n      },\n      { name: \"owner\", type: \"address\", internalType: \"address\" },\n      {\n        name: \"witness\",\n        type: \"tuple\",\n        internalType: \"struct x402BasePermit2Proxy.Witness\",\n        components: [\n          { name: \"to\", type: \"address\", internalType: \"address\" },\n          { name: \"validAfter\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"extra\", type: \"bytes\", internalType: \"bytes\" },\n        ],\n      },\n      { name: \"signature\", type: \"bytes\", internalType: \"bytes\" },\n    ],\n    outputs: [],\n    stateMutability: \"nonpayable\",\n  },\n  { type: \"event\", name: \"Settled\", inputs: [], anonymous: false },\n  { type: \"event\", name: \"SettledWithPermit\", inputs: [], anonymous: false },\n  { type: \"error\", name: \"AlreadyInitialized\", inputs: [] },\n  { type: \"error\", name: \"InvalidDestination\", inputs: [] },\n  { type: \"error\", name: \"InvalidOwner\", inputs: [] },\n  { type: \"error\", name: \"InvalidPermit2Address\", inputs: [] },\n  { type: \"error\", name: \"PaymentTooEarly\", inputs: [] },\n  { type: \"error\", name: \"ReentrancyGuardReentrantCall\", inputs: [] },\n] as const;\n","import { toHex } from \"viem\";\nimport { EVM_NETWORK_CHAIN_ID_MAP, EvmNetworkV1 } from \"./v1\";\n\n/**\n * Extract chain ID from network string (e.g., \"base-sepolia\" -> 84532)\n * Used by v1 implementations\n *\n * @param network - The network identifier\n * @returns The numeric chain ID\n * @throws Error if the network is not supported\n */\nexport function getEvmChainId(network: EvmNetworkV1): number {\n  const chainId = EVM_NETWORK_CHAIN_ID_MAP[network];\n  if (!chainId) {\n    throw new Error(`Unsupported network: ${network}`);\n  }\n  return chainId;\n}\n\n/**\n * Get the crypto object from the global scope.\n *\n * @returns The crypto object\n * @throws Error if crypto API is not available\n */\nfunction getCrypto(): Crypto {\n  const cryptoObj = globalThis.crypto as Crypto | undefined;\n  if (!cryptoObj) {\n    throw new Error(\"Crypto API not available\");\n  }\n  return cryptoObj;\n}\n\n/**\n * Create a random 32-byte nonce for EIP-3009 authorization.\n *\n * @returns A hex-encoded 32-byte nonce\n */\nexport function createNonce(): `0x${string}` {\n  return toHex(getCrypto().getRandomValues(new Uint8Array(32)));\n}\n\n/**\n * Creates a random 256-bit nonce for Permit2.\n * Permit2 uses uint256 nonces (not bytes32 like EIP-3009).\n *\n * @returns A string representation of the random nonce\n */\nexport function createPermit2Nonce(): string {\n  const randomBytes = getCrypto().getRandomValues(new Uint8Array(32));\n  return BigInt(toHex(randomBytes)).toString();\n}\n","import {\n  PaymentPayload,\n  PaymentPayloadV1,\n  PaymentRequirements,\n  SchemeNetworkFacilitator,\n  SettleResponse,\n  VerifyResponse,\n} from \"@x402/core/types\";\nimport { PaymentRequirementsV1 } from \"@x402/core/types/v1\";\nimport { getAddress, Hex, isAddressEqual, parseErc6492Signature, parseSignature } from \"viem\";\nimport { authorizationTypes, eip3009ABI } from \"../../../constants\";\nimport { FacilitatorEvmSigner } from \"../../../signer\";\nimport { ExactEvmPayloadV1 } from \"../../../types\";\nimport { getEvmChainId } from \"../../../utils\";\nimport { EvmNetworkV1 } from \"../../../v1\";\n\nexport interface ExactEvmSchemeV1Config {\n  /**\n   * If enabled, the facilitator will deploy ERC-4337 smart wallets\n   * via EIP-6492 when encountering undeployed contract signatures.\n   *\n   * @default false\n   */\n  deployERC4337WithEIP6492?: boolean;\n}\n\n/**\n * EVM facilitator implementation for the Exact payment scheme (V1).\n */\nexport class ExactEvmSchemeV1 implements SchemeNetworkFacilitator {\n  readonly scheme = \"exact\";\n  readonly caipFamily = \"eip155:*\";\n  private readonly config: Required<ExactEvmSchemeV1Config>;\n\n  /**\n   * Creates a new ExactEvmFacilitatorV1 instance.\n   *\n   * @param signer - The EVM signer for facilitator operations\n   * @param config - Optional configuration for the facilitator\n   */\n  constructor(\n    private readonly signer: FacilitatorEvmSigner,\n    config?: ExactEvmSchemeV1Config,\n  ) {\n    this.config = {\n      deployERC4337WithEIP6492: config?.deployERC4337WithEIP6492 ?? false,\n    };\n  }\n\n  /**\n   * Get mechanism-specific extra data for the supported kinds endpoint.\n   * For EVM, no extra data is needed.\n   *\n   * @param _ - The network identifier (unused for EVM)\n   * @returns undefined (EVM has no extra data)\n   */\n  getExtra(_: string): Record<string, unknown> | undefined {\n    return undefined;\n  }\n\n  /**\n   * Get signer addresses used by this facilitator.\n   * Returns all addresses this facilitator can use for signing/settling transactions.\n   *\n   * @param _ - The network identifier (unused for EVM, addresses are network-agnostic)\n   * @returns Array of facilitator wallet addresses\n   */\n  getSigners(_: string): string[] {\n    return [...this.signer.getAddresses()];\n  }\n\n  /**\n   * Verifies a payment payload (V1).\n   *\n   * @param payload - The payment payload to verify\n   * @param requirements - The payment requirements\n   * @returns Promise resolving to verification response\n   */\n  async verify(\n    payload: PaymentPayload,\n    requirements: PaymentRequirements,\n  ): Promise<VerifyResponse> {\n    const requirementsV1 = requirements as unknown as PaymentRequirementsV1;\n    const payloadV1 = payload as unknown as PaymentPayloadV1;\n    const exactEvmPayload = payload.payload as ExactEvmPayloadV1;\n\n    // Verify scheme matches\n    if (payloadV1.scheme !== \"exact\" || requirements.scheme !== \"exact\") {\n      return {\n        isValid: false,\n        invalidReason: \"unsupported_scheme\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Get chain configuration\n    let chainId: number;\n    try {\n      chainId = getEvmChainId(payloadV1.network as EvmNetworkV1);\n    } catch {\n      return {\n        isValid: false,\n        invalidReason: `invalid_network`,\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    if (!requirements.extra?.name || !requirements.extra?.version) {\n      return {\n        isValid: false,\n        invalidReason: \"missing_eip712_domain\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    const { name, version } = requirements.extra;\n    const erc20Address = getAddress(requirements.asset);\n\n    // Verify network 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getAddress(exactEvmPayload.authorization.from),\n            getAddress(exactEvmPayload.authorization.to),\n            BigInt(exactEvmPayload.authorization.value),\n            BigInt(exactEvmPayload.authorization.validAfter),\n            BigInt(exactEvmPayload.authorization.validBefore),\n            exactEvmPayload.authorization.nonce,\n            signature,\n          ],\n        });\n      }\n\n      // Wait for transaction confirmation\n      const receipt = await this.signer.waitForTransactionReceipt({ hash: tx });\n\n      if (receipt.status !== \"success\") {\n        return {\n          success: false,\n          errorReason: \"invalid_transaction_state\",\n          transaction: tx,\n          network: payloadV1.network,\n          payer: exactEvmPayload.authorization.from,\n        };\n      }\n\n      return {\n        success: true,\n        transaction: tx,\n        network: payloadV1.network,\n        payer: exactEvmPayload.authorization.from,\n      };\n    } catch (error) {\n      console.error(\"Failed to settle transaction:\", error);\n      return {\n        success: false,\n        errorReason: \"transaction_failed\",\n        transaction: \"\",\n        network: payloadV1.network,\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n  }\n}\n","export { ExactEvmSchemeV1 } from \"../exact/v1\";\n\nexport const EVM_NETWORK_CHAIN_ID_MAP = {\n  ethereum: 1,\n  sepolia: 11155111,\n  abstract: 2741,\n  \"abstract-testnet\": 11124,\n  \"base-sepolia\": 84532,\n  base: 8453,\n  \"avalanche-fuji\": 43113,\n  avalanche: 43114,\n  iotex: 4689,\n  sei: 1329,\n  \"sei-testnet\": 1328,\n  polygon: 137,\n  \"polygon-amoy\": 80002,\n  peaq: 3338,\n  story: 1514,\n  educhain: 41923,\n  \"skale-base-sepolia\": 324705682,\n} as const;\n\nexport type EvmNetworkV1 = keyof typeof EVM_NETWORK_CHAIN_ID_MAP;\n\nexport const NETWORKS: string[] = 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dist/esm/chunk-PFULIQAE.mjs

+// src/types.ts
+function isPermit2Payload(payload) {
+  return "permit2Authorization" in payload;
+}
+function isEIP3009Payload(payload) {
+  return "authorization" in payload;
+}
+
+export {
+  isPermit2Payload,
+  isEIP3009Payload
+};
+//# sourceMappingURL=chunk-PFULIQAE.mjs.map

dist/esm/chunk-PFULIQAE.mjs.map

+{"version":3,"sources":["../../src/types.ts"],"sourcesContent":["/**\n * Asset transfer methods for the exact EVM scheme.\n * - eip3009: Uses transferWithAuthorization (USDC, etc.) - recommended for compatible tokens\n * - permit2: Uses Permit2 + x402Permit2Proxy - universal fallback for any ERC-20\n */\nexport type AssetTransferMethod = \"eip3009\" | \"permit2\";\n\n/**\n * EIP-3009 payload for tokens with native transferWithAuthorization support.\n */\nexport type ExactEIP3009Payload = {\n  signature?: `0x${string}`;\n  authorization: {\n    from: `0x${string}`;\n    to: `0x${string}`;\n    value: string;\n    validAfter: string;\n    validBefore: string;\n    nonce: `0x${string}`;\n  };\n};\n\n/**\n * Permit2 witness data structure.\n * Matches the Witness struct in x402Permit2Proxy contract.\n * Note: Upper time bound is enforced by Permit2's `deadline` field, not a witness field.\n */\nexport type Permit2Witness = {\n  to: `0x${string}`;\n  validAfter: string;\n  extra: `0x${string}`;\n};\n\n/**\n * Permit2 authorization parameters.\n * Used to reconstruct the signed message for verification.\n */\nexport type Permit2Authorization = {\n  permitted: {\n    token: `0x${string}`;\n    amount: string;\n  };\n  spender: `0x${string}`;\n  nonce: string;\n  deadline: string;\n  witness: Permit2Witness;\n};\n\n/**\n * Permit2 payload for tokens using the Permit2 + x402Permit2Proxy flow.\n */\nexport type ExactPermit2Payload = {\n  signature: `0x${string}`;\n  permit2Authorization: Permit2Authorization & {\n    from: `0x${string}`;\n  };\n};\n\nexport type ExactEvmPayloadV1 = ExactEIP3009Payload;\n\nexport type ExactEvmPayloadV2 = ExactEIP3009Payload | ExactPermit2Payload;\n\n/**\n * Type guard to check if a payload is a Permit2 payload.\n * Permit2 payloads have a `permit2Authorization` field.\n *\n * @param payload - The payload to check.\n * @returns True if the payload is a Permit2 payload, false otherwise.\n */\nexport function isPermit2Payload(payload: ExactEvmPayloadV2): payload is ExactPermit2Payload {\n  return \"permit2Authorization\" in payload;\n}\n\n/**\n * Type guard to check if a payload is an EIP-3009 payload.\n * EIP-3009 payloads have an `authorization` field.\n *\n * @param payload - The payload to check.\n * @returns True if the payload is an EIP-3009 payload, false otherwise.\n */\nexport function isEIP3009Payload(payload: ExactEvmPayloadV2): payload is ExactEIP3009Payload {\n  return \"authorization\" in payload;\n}\n"],"mappings":";AAqEO,SAAS,iBAAiB,SAA4D;AAC3F,SAAO,0BAA0B;AACnC;AASO,SAAS,iBAAiB,SAA4D;AAC3F,SAAO,mBAAmB;AAC5B;","names":[]}

dist/esm/chunk-U4H6Q62Q.mjs

+import {
+  ExactEvmSchemeV1,
+  NETWORKS,
+  PERMIT2_ADDRESS,
+  authorizationTypes,
+  createNonce,
+  createPermit2Nonce,
+  permit2WitnessTypes,
+  x402ExactPermit2ProxyAddress
+} from "./chunk-DSSJHWGT.mjs";
+
+// src/exact/client/eip3009.ts
+import { getAddress } from "viem";
+async function createEIP3009Payload(signer, x402Version, paymentRequirements) {
+  const nonce = createNonce();
+  const now = Math.floor(Date.now() / 1e3);
+  const authorization = {
+    from: signer.address,
+    to: getAddress(paymentRequirements.payTo),
+    value: paymentRequirements.amount,
+    validAfter: (now - 600).toString(),
+    validBefore: (now + paymentRequirements.maxTimeoutSeconds).toString(),
+    nonce
+  };
+  const signature = await signEIP3009Authorization(signer, authorization, paymentRequirements);
+  const payload = {
+    authorization,
+    signature
+  };
+  return {
+    x402Version,
+    payload
+  };
+}
+async function signEIP3009Authorization(signer, authorization, requirements) {
+  const chainId = parseInt(requirements.network.split(":")[1]);
+  if (!requirements.extra?.name || !requirements.extra?.version) {
+    throw new Error(
+      `EIP-712 domain parameters (name, version) are required in payment requirements for asset ${requirements.asset}`
+    );
+  }
+  const { name, version } = requirements.extra;
+  const domain = {
+    name,
+    version,
+    chainId,
+    verifyingContract: getAddress(requirements.asset)
+  };
+  const message = {
+    from: getAddress(authorization.from),
+    to: getAddress(authorization.to),
+    value: BigInt(authorization.value),
+    validAfter: BigInt(authorization.validAfter),
+    validBefore: BigInt(authorization.validBefore),
+    nonce: authorization.nonce
+  };
+  return await signer.signTypedData({
+    domain,
+    types: authorizationTypes,
+    primaryType: "TransferWithAuthorization",
+    message
+  });
+}
+
+// src/exact/client/permit2.ts
+import { encodeFunctionData, getAddress as getAddress2 } from "viem";
+var MAX_UINT256 = BigInt("0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff");
+async function createPermit2Payload(signer, x402Version, paymentRequirements) {
+  const now = Math.floor(Date.now() / 1e3);
+  const nonce = createPermit2Nonce();
+  const validAfter = (now - 600).toString();
+  const deadline = (now + paymentRequirements.maxTimeoutSeconds).toString();
+  const permit2Authorization = {
+    from: signer.address,
+    permitted: {
+      token: getAddress2(paymentRequirements.asset),
+      amount: paymentRequirements.amount
+    },
+    spender: x402ExactPermit2ProxyAddress,
+    nonce,
+    deadline,
+    witness: {
+      to: getAddress2(paymentRequirements.payTo),
+      validAfter,
+      extra: "0x"
+    }
+  };
+  const signature = await signPermit2Authorization(
+    signer,
+    permit2Authorization,
+    paymentRequirements
+  );
+  const payload = {
+    signature,
+    permit2Authorization
+  };
+  return {
+    x402Version,
+    payload
+  };
+}
+async function signPermit2Authorization(signer, permit2Authorization, requirements) {
+  const chainId = parseInt(requirements.network.split(":")[1]);
+  const domain = {
+    name: "Permit2",
+    chainId,
+    verifyingContract: PERMIT2_ADDRESS
+  };
+  const message = {
+    permitted: {
+      token: getAddress2(permit2Authorization.permitted.token),
+      amount: BigInt(permit2Authorization.permitted.amount)
+    },
+    spender: getAddress2(permit2Authorization.spender),
+    nonce: BigInt(permit2Authorization.nonce),
+    deadline: BigInt(permit2Authorization.deadline),
+    witness: {
+      to: getAddress2(permit2Authorization.witness.to),
+      validAfter: BigInt(permit2Authorization.witness.validAfter),
+      extra: permit2Authorization.witness.extra
+    }
+  };
+  return await signer.signTypedData({
+    domain,
+    types: permit2WitnessTypes,
+    primaryType: "PermitWitnessTransferFrom",
+    message
+  });
+}
+var erc20ApproveAbi = [
+  {
+    type: "function",
+    name: "approve",
+    inputs: [
+      { name: "spender", type: "address" },
+      { name: "amount", type: "uint256" }
+    ],
+    outputs: [{ type: "bool" }],
+    stateMutability: "nonpayable"
+  }
+];
+var erc20AllowanceAbi = [
+  {
+    type: "function",
+    name: "allowance",
+    inputs: [
+      { name: "owner", type: "address" },
+      { name: "spender", type: "address" }
+    ],
+    outputs: [{ type: "uint256" }],
+    stateMutability: "view"
+  }
+];
+function createPermit2ApprovalTx(tokenAddress) {
+  const data = encodeFunctionData({
+    abi: erc20ApproveAbi,
+    functionName: "approve",
+    args: [PERMIT2_ADDRESS, MAX_UINT256]
+  });
+  return {
+    to: getAddress2(tokenAddress),
+    data
+  };
+}
+function getPermit2AllowanceReadParams(params) {
+  return {
+    address: getAddress2(params.tokenAddress),
+    abi: erc20AllowanceAbi,
+    functionName: "allowance",
+    args: [getAddress2(params.ownerAddress), PERMIT2_ADDRESS]
+  };
+}
+
+// src/exact/client/scheme.ts
+var ExactEvmScheme = class {
+  /**
+   * Creates a new ExactEvmClient instance.
+   *
+   * @param signer - The EVM signer for client operations
+   */
+  constructor(signer) {
+    this.signer = signer;
+    this.scheme = "exact";
+  }
+  /**
+   * Creates a payment payload for the Exact scheme.
+   * Routes to EIP-3009 or Permit2 based on requirements.extra.assetTransferMethod.
+   *
+   * @param x402Version - The x402 protocol version
+   * @param paymentRequirements - The payment requirements
+   * @returns Promise resolving to a payment payload result
+   */
+  async createPaymentPayload(x402Version, paymentRequirements) {
+    const assetTransferMethod = paymentRequirements.extra?.assetTransferMethod ?? "eip3009";
+    if (assetTransferMethod === "permit2") {
+      return createPermit2Payload(this.signer, x402Version, paymentRequirements);
+    }
+    return createEIP3009Payload(this.signer, x402Version, paymentRequirements);
+  }
+};
+
+// src/exact/client/register.ts
+function registerExactEvmScheme(client, config) {
+  if (config.networks && config.networks.length > 0) {
+    config.networks.forEach((network) => {
+      client.register(network, new ExactEvmScheme(config.signer));
+    });
+  } else {
+    client.register("eip155:*", new ExactEvmScheme(config.signer));
+  }
+  NETWORKS.forEach((network) => {
+    client.registerV1(network, new ExactEvmSchemeV1(config.signer));
+  });
+  if (config.policies) {
+    config.policies.forEach((policy) => {
+      client.registerPolicy(policy);
+    });
+  }
+  return client;
+}
+
+export {
+  erc20AllowanceAbi,
+  createPermit2ApprovalTx,
+  getPermit2AllowanceReadParams,
+  ExactEvmScheme,
+  registerExactEvmScheme
+};
+//# sourceMappingURL=chunk-U4H6Q62Q.mjs.map

dist/esm/chunk-U4H6Q62Q.mjs.map

+{"version":3,"sources":["../../src/exact/client/eip3009.ts","../../src/exact/client/permit2.ts","../../src/exact/client/scheme.ts","../../src/exact/client/register.ts"],"sourcesContent":["import { PaymentRequirements, PaymentPayloadResult } from \"@x402/core/types\";\nimport { getAddress } from \"viem\";\nimport { authorizationTypes } from \"../../constants\";\nimport { ClientEvmSigner } from \"../../signer\";\nimport { ExactEIP3009Payload } from \"../../types\";\nimport { createNonce } from \"../../utils\";\n\n/**\n * Creates an EIP-3009 (transferWithAuthorization) payload.\n *\n * @param signer - The EVM signer for client operations\n * @param x402Version - The x402 protocol version\n * @param paymentRequirements - The payment requirements\n * @returns Promise resolving to a payment payload result\n */\nexport async function createEIP3009Payload(\n  signer: ClientEvmSigner,\n  x402Version: number,\n  paymentRequirements: PaymentRequirements,\n): Promise<PaymentPayloadResult> {\n  const nonce = createNonce();\n  const now = Math.floor(Date.now() / 1000);\n\n  const authorization: ExactEIP3009Payload[\"authorization\"] = {\n    from: signer.address,\n    to: getAddress(paymentRequirements.payTo),\n    value: paymentRequirements.amount,\n    validAfter: (now - 600).toString(),\n    validBefore: (now + paymentRequirements.maxTimeoutSeconds).toString(),\n    nonce,\n  };\n\n  const signature = await signEIP3009Authorization(signer, authorization, paymentRequirements);\n\n  const payload: ExactEIP3009Payload = {\n    authorization,\n    signature,\n  };\n\n  return {\n    x402Version,\n    payload,\n  };\n}\n\n/**\n * Sign the EIP-3009 authorization using EIP-712.\n *\n * @param signer - The EVM signer\n * @param authorization - The authorization to sign\n * @param requirements - The payment requirements\n * @returns Promise resolving to the signature\n */\nasync function signEIP3009Authorization(\n  signer: ClientEvmSigner,\n  authorization: ExactEIP3009Payload[\"authorization\"],\n  requirements: PaymentRequirements,\n): Promise<`0x${string}`> {\n  const chainId = parseInt(requirements.network.split(\":\")[1]);\n\n  if (!requirements.extra?.name || !requirements.extra?.version) {\n    throw new Error(\n      `EIP-712 domain parameters (name, version) are required in payment requirements for asset ${requirements.asset}`,\n    );\n  }\n\n  const { name, version } = requirements.extra;\n\n  const domain = {\n    name,\n    version,\n    chainId,\n    verifyingContract: getAddress(requirements.asset),\n  };\n\n  const message = {\n    from: getAddress(authorization.from),\n    to: getAddress(authorization.to),\n    value: BigInt(authorization.value),\n    validAfter: BigInt(authorization.validAfter),\n    validBefore: BigInt(authorization.validBefore),\n    nonce: authorization.nonce,\n  };\n\n  return await signer.signTypedData({\n    domain,\n    types: authorizationTypes,\n    primaryType: \"TransferWithAuthorization\",\n    message,\n  });\n}\n","import { PaymentRequirements, PaymentPayloadResult } from \"@x402/core/types\";\nimport { encodeFunctionData, getAddress } from \"viem\";\nimport {\n  permit2WitnessTypes,\n  PERMIT2_ADDRESS,\n  x402ExactPermit2ProxyAddress,\n} from \"../../constants\";\nimport { ClientEvmSigner } from \"../../signer\";\nimport { ExactPermit2Payload } from \"../../types\";\nimport { createPermit2Nonce } from \"../../utils\";\n\n/** Maximum uint256 value for unlimited approval. */\nconst MAX_UINT256 = BigInt(\"0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff\");\n\n/**\n * Creates a Permit2 payload using the x402Permit2Proxy witness pattern.\n * The spender is set to x402Permit2Proxy, which enforces that funds\n * can only be sent to the witness.to address.\n *\n * @param signer - The EVM signer for client operations\n * @param x402Version - The x402 protocol version\n * @param paymentRequirements - The payment requirements\n * @returns Promise resolving to a payment payload result\n */\nexport async function createPermit2Payload(\n  signer: ClientEvmSigner,\n  x402Version: number,\n  paymentRequirements: PaymentRequirements,\n): Promise<PaymentPayloadResult> {\n  const now = Math.floor(Date.now() / 1000);\n  const nonce = createPermit2Nonce();\n\n  // Lower time bound - allow some clock skew\n  const validAfter = (now - 600).toString();\n  // Upper time bound is enforced by Permit2's deadline field\n  const deadline = (now + paymentRequirements.maxTimeoutSeconds).toString();\n\n  const permit2Authorization: ExactPermit2Payload[\"permit2Authorization\"] = {\n    from: signer.address,\n    permitted: {\n      token: getAddress(paymentRequirements.asset),\n      amount: paymentRequirements.amount,\n    },\n    spender: x402ExactPermit2ProxyAddress,\n    nonce,\n    deadline,\n    witness: {\n      to: getAddress(paymentRequirements.payTo),\n      validAfter,\n      extra: \"0x\",\n    },\n  };\n\n  const signature = await signPermit2Authorization(\n    signer,\n    permit2Authorization,\n    paymentRequirements,\n  );\n\n  const payload: ExactPermit2Payload = {\n    signature,\n    permit2Authorization,\n  };\n\n  return {\n    x402Version,\n    payload,\n  };\n}\n\n/**\n * Sign the Permit2 authorization using EIP-712 with witness data.\n * The signature authorizes the x402Permit2Proxy to transfer tokens on behalf of the signer.\n *\n * @param signer - The EVM signer\n * @param permit2Authorization - The Permit2 authorization parameters\n * @param requirements - The payment requirements\n * @returns Promise resolving to the signature\n */\nasync function signPermit2Authorization(\n  signer: ClientEvmSigner,\n  permit2Authorization: ExactPermit2Payload[\"permit2Authorization\"],\n  requirements: PaymentRequirements,\n): Promise<`0x${string}`> {\n  const chainId = parseInt(requirements.network.split(\":\")[1]);\n\n  const domain = {\n    name: \"Permit2\",\n    chainId,\n    verifyingContract: PERMIT2_ADDRESS,\n  };\n\n  const message = {\n    permitted: {\n      token: getAddress(permit2Authorization.permitted.token),\n      amount: BigInt(permit2Authorization.permitted.amount),\n    },\n    spender: getAddress(permit2Authorization.spender),\n    nonce: BigInt(permit2Authorization.nonce),\n    deadline: BigInt(permit2Authorization.deadline),\n    witness: {\n      to: getAddress(permit2Authorization.witness.to),\n      validAfter: BigInt(permit2Authorization.witness.validAfter),\n      extra: permit2Authorization.witness.extra,\n    },\n  };\n\n  return await signer.signTypedData({\n    domain,\n    types: permit2WitnessTypes,\n    primaryType: \"PermitWitnessTransferFrom\",\n    message,\n  });\n}\n\n/**\n * ERC20 approve ABI for encoding approval transactions.\n */\nconst erc20ApproveAbi = [\n  {\n    type: \"function\",\n    name: \"approve\",\n    inputs: [\n      { name: \"spender\", type: \"address\" },\n      { name: \"amount\", type: \"uint256\" },\n    ],\n    outputs: [{ type: \"bool\" }],\n    stateMutability: \"nonpayable\",\n  },\n] as const;\n\n/**\n * ERC20 allowance ABI for checking approval status.\n */\nexport const erc20AllowanceAbi = [\n  {\n    type: \"function\",\n    name: \"allowance\",\n    inputs: [\n      { name: \"owner\", type: \"address\" },\n      { name: \"spender\", type: \"address\" },\n    ],\n    outputs: [{ type: \"uint256\" }],\n    stateMutability: \"view\",\n  },\n] as const;\n\n/**\n * Creates transaction data to approve Permit2 to spend tokens.\n * The user sends this transaction (paying gas) before using Permit2 flow.\n *\n * @param tokenAddress - The ERC20 token contract address\n * @returns Transaction data to send for approval\n *\n * @example\n * ```typescript\n * const tx = createPermit2ApprovalTx(\"0x...\");\n * await walletClient.sendTransaction({\n *   to: tx.to,\n *   data: tx.data,\n * });\n * ```\n */\nexport function createPermit2ApprovalTx(tokenAddress: `0x${string}`): {\n  to: `0x${string}`;\n  data: `0x${string}`;\n} {\n  const data = encodeFunctionData({\n    abi: erc20ApproveAbi,\n    functionName: \"approve\",\n    args: [PERMIT2_ADDRESS, MAX_UINT256],\n  });\n\n  return {\n    to: getAddress(tokenAddress),\n    data,\n  };\n}\n\n/**\n * Parameters for checking Permit2 allowance.\n * Application provides these to check if approval is needed.\n */\nexport interface Permit2AllowanceParams {\n  tokenAddress: `0x${string}`;\n  ownerAddress: `0x${string}`;\n}\n\n/**\n * Returns contract read parameters for checking Permit2 allowance.\n * Use with a public client to check if the user has approved Permit2.\n *\n * @param params - The allowance check parameters\n * @returns Contract read parameters for checking allowance\n *\n * @example\n * ```typescript\n * const readParams = getPermit2AllowanceReadParams({\n *   tokenAddress: \"0x...\",\n *   ownerAddress: \"0x...\",\n * });\n *\n * const allowance = await publicClient.readContract(readParams);\n * const needsApproval = allowance < requiredAmount;\n * ```\n */\nexport function getPermit2AllowanceReadParams(params: Permit2AllowanceParams): {\n  address: `0x${string}`;\n  abi: typeof erc20AllowanceAbi;\n  functionName: \"allowance\";\n  args: [`0x${string}`, `0x${string}`];\n} {\n  return {\n    address: getAddress(params.tokenAddress),\n    abi: erc20AllowanceAbi,\n    functionName: \"allowance\",\n    args: [getAddress(params.ownerAddress), PERMIT2_ADDRESS],\n  };\n}\n","import { PaymentRequirements, SchemeNetworkClient, PaymentPayloadResult } from \"@x402/core/types\";\nimport { ClientEvmSigner } from \"../../signer\";\nimport { AssetTransferMethod } from \"../../types\";\nimport { createEIP3009Payload } from \"./eip3009\";\nimport { createPermit2Payload } from \"./permit2\";\n\n/**\n * EVM client implementation for the Exact payment scheme.\n * Supports both EIP-3009 (transferWithAuthorization) and Permit2 flows.\n *\n * Routes to the appropriate authorization method based on\n * `requirements.extra.assetTransferMethod`. Defaults to EIP-3009\n * for backward compatibility with older facilitators.\n */\nexport class ExactEvmScheme implements SchemeNetworkClient {\n  readonly scheme = \"exact\";\n\n  /**\n   * Creates a new ExactEvmClient instance.\n   *\n   * @param signer - The EVM signer for client operations\n   */\n  constructor(private readonly signer: ClientEvmSigner) {}\n\n  /**\n   * Creates a payment payload for the Exact scheme.\n   * Routes to EIP-3009 or Permit2 based on requirements.extra.assetTransferMethod.\n   *\n   * @param x402Version - The x402 protocol version\n   * @param paymentRequirements - The payment requirements\n   * @returns Promise resolving to a payment payload result\n   */\n  async createPaymentPayload(\n    x402Version: number,\n    paymentRequirements: PaymentRequirements,\n  ): Promise<PaymentPayloadResult> {\n    const assetTransferMethod =\n      (paymentRequirements.extra?.assetTransferMethod as AssetTransferMethod) ?? \"eip3009\";\n\n    if (assetTransferMethod === \"permit2\") {\n      return createPermit2Payload(this.signer, x402Version, paymentRequirements);\n    }\n\n    return createEIP3009Payload(this.signer, x402Version, paymentRequirements);\n  }\n}\n","import { x402Client, SelectPaymentRequirements, PaymentPolicy } from \"@x402/core/client\";\nimport { Network } from \"@x402/core/types\";\nimport { ClientEvmSigner } from \"../../signer\";\nimport { ExactEvmScheme } from \"./scheme\";\nimport { ExactEvmSchemeV1 } from \"../v1/client/scheme\";\nimport { NETWORKS } from \"../../v1\";\n\n/**\n * Configuration options for registering EVM schemes to an x402Client\n */\nexport interface EvmClientConfig {\n  /**\n   * The EVM signer to use for creating payment payloads\n   */\n  signer: ClientEvmSigner;\n\n  /**\n   * Optional payment requirements selector function\n   * If not provided, uses the default selector (first available option)\n   */\n  paymentRequirementsSelector?: SelectPaymentRequirements;\n\n  /**\n   * Optional policies to 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signer: account });\n * ```\n */\nexport function registerExactEvmScheme(client: x402Client, config: EvmClientConfig): x402Client {\n  // Register V2 scheme\n  if (config.networks && config.networks.length > 0) {\n    // Register specific networks\n    config.networks.forEach(network => {\n      client.register(network, new ExactEvmScheme(config.signer));\n    });\n  } else {\n    // Register wildcard for all EVM chains\n    client.register(\"eip155:*\", new ExactEvmScheme(config.signer));\n  }\n\n  // Register all V1 networks\n  NETWORKS.forEach(network => {\n    client.registerV1(network as Network, new ExactEvmSchemeV1(config.signer));\n  });\n\n  // Apply policies if provided\n  if (config.policies) {\n    config.policies.forEach(policy => {\n      client.registerPolicy(policy);\n    });\n  }\n\n  return 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dist/esm/permit2-BsAoJiWD.d.mts

+import { SchemeNetworkClient, PaymentRequirements, PaymentPayloadResult } from '@x402/core/types';
+import { C as ClientEvmSigner } from './signer-5OVDxViv.mjs';
+
+/**
+ * EVM client implementation for the Exact payment scheme.
+ * Supports both EIP-3009 (transferWithAuthorization) and Permit2 flows.
+ *
+ * Routes to the appropriate authorization method based on
+ * `requirements.extra.assetTransferMethod`. Defaults to EIP-3009
+ * for backward compatibility with older facilitators.
+ */
+declare class ExactEvmScheme implements SchemeNetworkClient {
+    private readonly signer;
+    readonly scheme = "exact";
+    /**
+     * Creates a new ExactEvmClient instance.
+     *
+     * @param signer - The EVM signer for client operations
+     */
+    constructor(signer: ClientEvmSigner);
+    /**
+     * Creates a payment payload for the Exact scheme.
+     * Routes to EIP-3009 or Permit2 based on requirements.extra.assetTransferMethod.
+     *
+     * @param x402Version - The x402 protocol version
+     * @param paymentRequirements - The payment requirements
+     * @returns Promise resolving to a payment payload result
+     */
+    createPaymentPayload(x402Version: number, paymentRequirements: PaymentRequirements): Promise<PaymentPayloadResult>;
+}
+
+/**
+ * ERC20 allowance ABI for checking approval status.
+ */
+declare const erc20AllowanceAbi: readonly [{
+    readonly type: "function";
+    readonly name: "allowance";
+    readonly inputs: readonly [{
+        readonly name: "owner";
+        readonly type: "address";
+    }, {
+        readonly name: "spender";
+        readonly type: "address";
+    }];
+    readonly outputs: readonly [{
+        readonly type: "uint256";
+    }];
+    readonly stateMutability: "view";
+}];
+/**
+ * Creates transaction data to approve Permit2 to spend tokens.
+ * The user sends this transaction (paying gas) before using Permit2 flow.
+ *
+ * @param tokenAddress - The ERC20 token contract address
+ * @returns Transaction data to send for approval
+ *
+ * @example
+ * ```typescript
+ * const tx = createPermit2ApprovalTx("0x...");
+ * await walletClient.sendTransaction({
+ *   to: tx.to,
+ *   data: tx.data,
+ * });
+ * ```
+ */
+declare function createPermit2ApprovalTx(tokenAddress: `0x${string}`): {
+    to: `0x${string}`;
+    data: `0x${string}`;
+};
+/**
+ * Parameters for checking Permit2 allowance.
+ * Application provides these to check if approval is needed.
+ */
+interface Permit2AllowanceParams {
+    tokenAddress: `0x${string}`;
+    ownerAddress: `0x${string}`;
+}
+/**
+ * Returns contract read parameters for checking Permit2 allowance.
+ * Use with a public client to check if the user has approved Permit2.
+ *
+ * @param params - The allowance check parameters
+ * @returns Contract read parameters for checking allowance
+ *
+ * @example
+ * ```typescript
+ * const readParams = getPermit2AllowanceReadParams({
+ *   tokenAddress: "0x...",
+ *   ownerAddress: "0x...",
+ * });
+ *
+ * const allowance = await publicClient.readContract(readParams);
+ * const needsApproval = allowance < requiredAmount;
+ * ```
+ */
+declare function getPermit2AllowanceReadParams(params: Permit2AllowanceParams): {
+    address: `0x${string}`;
+    abi: typeof erc20AllowanceAbi;
+    functionName: "allowance";
+    args: [`0x${string}`, `0x${string}`];
+};
+
+export { ExactEvmScheme as E, type Permit2AllowanceParams as P, createPermit2ApprovalTx as c, erc20AllowanceAbi as e, getPermit2AllowanceReadParams as g };

dist/cjs/exact/client/index.d.ts

@@ -1,3 +0,3 @@
-export { ExactEvmScheme } from '../../index.js';
-import { x402Client, SelectPaymentRequirements, PaymentPolicy } from '@x402/core/client';
+export { E as ExactEvmScheme, P as Permit2AllowanceParams, c as createPermit2ApprovalTx, e as erc20AllowanceAbi, g as getPermit2AllowanceReadParams } from '../../permit2-BYv82va2.js';
+import { SelectPaymentRequirements, PaymentPolicy, x402Client } from '@x402/core/client';
 import { Network } from '@x402/core/types';
@@ -4,0 +4,0 @@ import { C as ClientEvmSigner } from '../../signer-5OVDxViv.js';

dist/cjs/exact/client/index.js

@@ -24,2 +24,5 @@ "use strict";
   ExactEvmScheme: () => ExactEvmScheme,
+  createPermit2ApprovalTx: () => createPermit2ApprovalTx,
+  erc20AllowanceAbi: () => erc20AllowanceAbi,
+  getPermit2AllowanceReadParams: () => getPermit2AllowanceReadParams,
   registerExactEvmScheme: () => registerExactEvmScheme
@@ -29,4 +32,4 @@ });
 
-// src/exact/client/scheme.ts
-var import_viem2 = require("viem");
+// src/exact/client/eip3009.ts
+var import_viem4 = require("viem");
 
@@ -44,28 +47,31 @@ // src/constants.ts
 };
+var permit2WitnessTypes = {
+  PermitWitnessTransferFrom: [
+    { name: "permitted", type: "TokenPermissions" },
+    { name: "spender", type: "address" },
+    { name: "nonce", type: "uint256" },
+    { name: "deadline", type: "uint256" },
+    { name: "witness", type: "Witness" }
+  ],
+  TokenPermissions: [
+    { name: "token", type: "address" },
+    { name: "amount", type: "uint256" }
+  ],
+  Witness: [
+    { name: "to", type: "address" },
+    { name: "validAfter", type: "uint256" },
+    { name: "extra", type: "bytes" }
+  ]
+};
+var PERMIT2_ADDRESS = "0x000000000022D473030F116dDEE9F6B43aC78BA3";
+var x402ExactPermit2ProxyAddress = "0x4020615294c913F045dc10f0a5cdEbd86c280001";
 
 // src/utils.ts
+var import_viem3 = require("viem");
+
+// src/exact/v1/client/scheme.ts
 var import_viem = require("viem");
-function getEvmChainId(network) {
-  const networkMap = {
-    base: 8453,
-    "base-sepolia": 84532,
-    ethereum: 1,
-    sepolia: 11155111,
-    polygon: 137,
-    "polygon-amoy": 80002
-  };
-  return networkMap[network] || 1;
-}
-function createNonce() {
-  const cryptoObj = typeof globalThis.crypto !== "undefined" ? globalThis.crypto : globalThis.crypto;
-  if (!cryptoObj) {
-    throw new Error("Crypto API not available");
-  }
-  return (0, import_viem.toHex)(cryptoObj.getRandomValues(new Uint8Array(32)));
-}
-
-// src/exact/client/scheme.ts
-var ExactEvmScheme = class {
+var ExactEvmSchemeV1 = class {
   /**
-   * Creates a new ExactEvmClient instance.
+   * Creates a new ExactEvmClientV1 instance.
    *
@@ -79,3 +85,3 @@ * @param signer - The EVM signer for client operations
   /**
-   * Creates a payment payload for the Exact scheme.
+   * Creates a payment payload for the Exact scheme (V1).
    *
@@ -87,2 +93,3 @@ * @param x402Version - The x402 protocol version
   async createPaymentPayload(x402Version, paymentRequirements) {
+    const selectedV1 = paymentRequirements;
     const nonce = createNonce();
@@ -92,10 +99,10 @@ const now = Math.floor(Date.now() / 1e3);
       from: this.signer.address,
-      to: (0, import_viem2.getAddress)(paymentRequirements.payTo),
-      value: paymentRequirements.amount,
+      to: (0, import_viem.getAddress)(selectedV1.payTo),
+      value: selectedV1.maxAmountRequired,
       validAfter: (now - 600).toString(),
       // 10 minutes before
-      validBefore: (now + paymentRequirements.maxTimeoutSeconds).toString(),
+      validBefore: (now + selectedV1.maxTimeoutSeconds).toString(),
       nonce
     };
-    const signature = await this.signAuthorization(authorization, paymentRequirements);
+    const signature = await this.signAuthorization(authorization, selectedV1);
     const payload = {
@@ -107,2 +114,4 @@ authorization,
       x402Version,
+      scheme: selectedV1.scheme,
+      network: selectedV1.network,
       payload
@@ -119,3 +128,3 @@ };
   async signAuthorization(authorization, requirements) {
-    const chainId = parseInt(requirements.network.split(":")[1]);
+    const chainId = getEvmChainId(requirements.network);
     if (!requirements.extra?.name || !requirements.extra?.version) {
@@ -131,7 +140,7 @@ throw new Error(
       chainId,
-      verifyingContract: (0, import_viem2.getAddress)(requirements.asset)
+      verifyingContract: (0, import_viem.getAddress)(requirements.asset)
     };
     const message = {
-      from: (0, import_viem2.getAddress)(authorization.from),
-      to: (0, import_viem2.getAddress)(authorization.to),
+      from: (0, import_viem.getAddress)(authorization.from),
+      to: (0, import_viem.getAddress)(authorization.to),
       value: BigInt(authorization.value),
@@ -151,7 +160,215 @@ validAfter: BigInt(authorization.validAfter),
 
-// src/exact/v1/client/scheme.ts
-var import_viem3 = require("viem");
-var ExactEvmSchemeV1 = class {
+// src/exact/v1/facilitator/scheme.ts
+var import_viem2 = require("viem");
+
+// src/v1/index.ts
+var EVM_NETWORK_CHAIN_ID_MAP = {
+  ethereum: 1,
+  sepolia: 11155111,
+  abstract: 2741,
+  "abstract-testnet": 11124,
+  "base-sepolia": 84532,
+  base: 8453,
+  "avalanche-fuji": 43113,
+  avalanche: 43114,
+  iotex: 4689,
+  sei: 1329,
+  "sei-testnet": 1328,
+  polygon: 137,
+  "polygon-amoy": 80002,
+  peaq: 3338,
+  story: 1514,
+  educhain: 41923,
+  "skale-base-sepolia": 324705682
+};
+var NETWORKS = Object.keys(EVM_NETWORK_CHAIN_ID_MAP);
+
+// src/utils.ts
+function getEvmChainId(network) {
+  const chainId = EVM_NETWORK_CHAIN_ID_MAP[network];
+  if (!chainId) {
+    throw new Error(`Unsupported network: ${network}`);
+  }
+  return chainId;
+}
+function getCrypto() {
+  const cryptoObj = globalThis.crypto;
+  if (!cryptoObj) {
+    throw new Error("Crypto API not available");
+  }
+  return cryptoObj;
+}
+function createNonce() {
+  return (0, import_viem3.toHex)(getCrypto().getRandomValues(new Uint8Array(32)));
+}
+function createPermit2Nonce() {
+  const randomBytes = getCrypto().getRandomValues(new Uint8Array(32));
+  return BigInt((0, import_viem3.toHex)(randomBytes)).toString();
+}
+
+// src/exact/client/eip3009.ts
+async function createEIP3009Payload(signer, x402Version, paymentRequirements) {
+  const nonce = createNonce();
+  const now = Math.floor(Date.now() / 1e3);
+  const authorization = {
+    from: signer.address,
+    to: (0, import_viem4.getAddress)(paymentRequirements.payTo),
+    value: paymentRequirements.amount,
+    validAfter: (now - 600).toString(),
+    validBefore: (now + paymentRequirements.maxTimeoutSeconds).toString(),
+    nonce
+  };
+  const signature = await signEIP3009Authorization(signer, authorization, paymentRequirements);
+  const payload = {
+    authorization,
+    signature
+  };
+  return {
+    x402Version,
+    payload
+  };
+}
+async function signEIP3009Authorization(signer, authorization, requirements) {
+  const chainId = parseInt(requirements.network.split(":")[1]);
+  if (!requirements.extra?.name || !requirements.extra?.version) {
+    throw new Error(
+      `EIP-712 domain parameters (name, version) are required in payment requirements for asset ${requirements.asset}`
+    );
+  }
+  const { name, version } = requirements.extra;
+  const domain = {
+    name,
+    version,
+    chainId,
+    verifyingContract: (0, import_viem4.getAddress)(requirements.asset)
+  };
+  const message = {
+    from: (0, import_viem4.getAddress)(authorization.from),
+    to: (0, import_viem4.getAddress)(authorization.to),
+    value: BigInt(authorization.value),
+    validAfter: BigInt(authorization.validAfter),
+    validBefore: BigInt(authorization.validBefore),
+    nonce: authorization.nonce
+  };
+  return await signer.signTypedData({
+    domain,
+    types: authorizationTypes,
+    primaryType: "TransferWithAuthorization",
+    message
+  });
+}
+
+// src/exact/client/permit2.ts
+var import_viem5 = require("viem");
+var MAX_UINT256 = BigInt("0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff");
+async function createPermit2Payload(signer, x402Version, paymentRequirements) {
+  const now = Math.floor(Date.now() / 1e3);
+  const nonce = createPermit2Nonce();
+  const validAfter = (now - 600).toString();
+  const deadline = (now + paymentRequirements.maxTimeoutSeconds).toString();
+  const permit2Authorization = {
+    from: signer.address,
+    permitted: {
+      token: (0, import_viem5.getAddress)(paymentRequirements.asset),
+      amount: paymentRequirements.amount
+    },
+    spender: x402ExactPermit2ProxyAddress,
+    nonce,
+    deadline,
+    witness: {
+      to: (0, import_viem5.getAddress)(paymentRequirements.payTo),
+      validAfter,
+      extra: "0x"
+    }
+  };
+  const signature = await signPermit2Authorization(
+    signer,
+    permit2Authorization,
+    paymentRequirements
+  );
+  const payload = {
+    signature,
+    permit2Authorization
+  };
+  return {
+    x402Version,
+    payload
+  };
+}
+async function signPermit2Authorization(signer, permit2Authorization, requirements) {
+  const chainId = parseInt(requirements.network.split(":")[1]);
+  const domain = {
+    name: "Permit2",
+    chainId,
+    verifyingContract: PERMIT2_ADDRESS
+  };
+  const message = {
+    permitted: {
+      token: (0, import_viem5.getAddress)(permit2Authorization.permitted.token),
+      amount: BigInt(permit2Authorization.permitted.amount)
+    },
+    spender: (0, import_viem5.getAddress)(permit2Authorization.spender),
+    nonce: BigInt(permit2Authorization.nonce),
+    deadline: BigInt(permit2Authorization.deadline),
+    witness: {
+      to: (0, import_viem5.getAddress)(permit2Authorization.witness.to),
+      validAfter: BigInt(permit2Authorization.witness.validAfter),
+      extra: permit2Authorization.witness.extra
+    }
+  };
+  return await signer.signTypedData({
+    domain,
+    types: permit2WitnessTypes,
+    primaryType: "PermitWitnessTransferFrom",
+    message
+  });
+}
+var erc20ApproveAbi = [
+  {
+    type: "function",
+    name: "approve",
+    inputs: [
+      { name: "spender", type: "address" },
+      { name: "amount", type: "uint256" }
+    ],
+    outputs: [{ type: "bool" }],
+    stateMutability: "nonpayable"
+  }
+];
+var erc20AllowanceAbi = [
+  {
+    type: "function",
+    name: "allowance",
+    inputs: [
+      { name: "owner", type: "address" },
+      { name: "spender", type: "address" }
+    ],
+    outputs: [{ type: "uint256" }],
+    stateMutability: "view"
+  }
+];
+function createPermit2ApprovalTx(tokenAddress) {
+  const data = (0, import_viem5.encodeFunctionData)({
+    abi: erc20ApproveAbi,
+    functionName: "approve",
+    args: [PERMIT2_ADDRESS, MAX_UINT256]
+  });
+  return {
+    to: (0, import_viem5.getAddress)(tokenAddress),
+    data
+  };
+}
+function getPermit2AllowanceReadParams(params) {
+  return {
+    address: (0, import_viem5.getAddress)(params.tokenAddress),
+    abi: erc20AllowanceAbi,
+    functionName: "allowance",
+    args: [(0, import_viem5.getAddress)(params.ownerAddress), PERMIT2_ADDRESS]
+  };
+}
+
+// src/exact/client/scheme.ts
+var ExactEvmScheme = class {
   /**
-   * Creates a new ExactEvmClientV1 instance.
+   * Creates a new ExactEvmClient instance.
    *
@@ -165,93 +382,18 @@ * @param signer - The EVM signer for client operations
   /**
-   * Creates a payment payload for the Exact scheme (V1).
+   * Creates a payment payload for the Exact scheme.
+   * Routes to EIP-3009 or Permit2 based on requirements.extra.assetTransferMethod.
    *
    * @param x402Version - The x402 protocol version
    * @param paymentRequirements - The payment requirements
-   * @returns Promise resolving to a payment payload
+   * @returns Promise resolving to a payment payload result
    */
   async createPaymentPayload(x402Version, paymentRequirements) {
-    const selectedV1 = paymentRequirements;
-    const nonce = createNonce();
-    const now = Math.floor(Date.now() / 1e3);
-    const authorization = {
-      from: this.signer.address,
-      to: (0, import_viem3.getAddress)(selectedV1.payTo),
-      value: selectedV1.maxAmountRequired,
-      validAfter: (now - 600).toString(),
-      // 10 minutes before
-      validBefore: (now + selectedV1.maxTimeoutSeconds).toString(),
-      nonce
-    };
-    const signature = await this.signAuthorization(authorization, selectedV1);
-    const payload = {
-      authorization,
-      signature
-    };
-    return {
-      x402Version,
-      scheme: selectedV1.scheme,
-      network: selectedV1.network,
-      payload
-    };
-  }
-  /**
-   * Sign the EIP-3009 authorization using EIP-712
-   *
-   * @param authorization - The authorization to sign
-   * @param requirements - The payment requirements
-   * @returns Promise resolving to the signature
-   */
-  async signAuthorization(authorization, requirements) {
-    const chainId = getEvmChainId(requirements.network);
-    if (!requirements.extra?.name || !requirements.extra?.version) {
-      throw new Error(
-        `EIP-712 domain parameters (name, version) are required in payment requirements for asset ${requirements.asset}`
-      );
+    const assetTransferMethod = paymentRequirements.extra?.assetTransferMethod ?? "eip3009";
+    if (assetTransferMethod === "permit2") {
+      return createPermit2Payload(this.signer, x402Version, paymentRequirements);
     }
-    const { name, version } = requirements.extra;
-    const domain = {
-      name,
-      version,
-      chainId,
-      verifyingContract: (0, import_viem3.getAddress)(requirements.asset)
-    };
-    const message = {
-      from: (0, import_viem3.getAddress)(authorization.from),
-      to: (0, import_viem3.getAddress)(authorization.to),
-      value: BigInt(authorization.value),
-      validAfter: BigInt(authorization.validAfter),
-      validBefore: BigInt(authorization.validBefore),
-      nonce: authorization.nonce
-    };
-    return await this.signer.signTypedData({
-      domain,
-      types: authorizationTypes,
-      primaryType: "TransferWithAuthorization",
-      message
-    });
+    return createEIP3009Payload(this.signer, x402Version, paymentRequirements);
   }
 };
 
-// src/exact/v1/facilitator/scheme.ts
-var import_viem4 = require("viem");
-
-// src/v1/index.ts
-var NETWORKS = [
-  "abstract",
-  "abstract-testnet",
-  "base-sepolia",
-  "base",
-  "avalanche-fuji",
-  "avalanche",
-  "iotex",
-  "sei",
-  "sei-testnet",
-  "polygon",
-  "polygon-amoy",
-  "peaq",
-  "story",
-  "educhain",
-  "skale-base-sepolia"
-];
-
 // src/exact/client/register.ts
@@ -279,4 +421,7 @@ function registerExactEvmScheme(client, config) {
   ExactEvmScheme,
+  createPermit2ApprovalTx,
+  erc20AllowanceAbi,
+  getPermit2AllowanceReadParams,
   registerExactEvmScheme
 });
 //# sourceMappingURL=index.js.map

dist/cjs/exact/client/index.js.map

@@ -1,1 +0,1 @@
-{"version":3,"sources":["../../../../src/exact/client/index.ts","../../../../src/exact/client/scheme.ts","../../../../src/constants.ts","../../../../src/utils.ts","../../../../src/exact/v1/client/scheme.ts","../../../../src/exact/v1/facilitator/scheme.ts","../../../../src/v1/index.ts","../../../../src/exact/client/register.ts"],"sourcesContent":["export { ExactEvmScheme } from \"./scheme\";\nexport { registerExactEvmScheme } from \"./register\";\nexport type { EvmClientConfig } from \"./register\";\n","import { PaymentPayload, PaymentRequirements, SchemeNetworkClient } from \"@x402/core/types\";\nimport { getAddress } from \"viem\";\nimport { authorizationTypes } from \"../../constants\";\nimport { ClientEvmSigner } from \"../../signer\";\nimport { ExactEvmPayloadV2 } from \"../../types\";\nimport { createNonce } from \"../../utils\";\n\n/**\n * EVM client implementation for the Exact payment scheme.\n *\n */\nexport class ExactEvmScheme implements SchemeNetworkClient {\n  readonly scheme = \"exact\";\n\n  /**\n   * Creates a new ExactEvmClient instance.\n   *\n   * @param signer - The EVM signer for client operations\n   */\n  constructor(private readonly signer: ClientEvmSigner) {}\n\n  /**\n   * Creates a payment payload for the Exact scheme.\n   *\n   * @param x402Version - The x402 protocol version\n   * @param paymentRequirements - The payment requirements\n   * @returns Promise resolving to a payment payload\n   */\n  async createPaymentPayload(\n    x402Version: number,\n    paymentRequirements: PaymentRequirements,\n  ): Promise<Pick<PaymentPayload, \"x402Version\" | \"payload\">> {\n    const nonce = createNonce();\n    const now = Math.floor(Date.now() / 1000);\n\n    const authorization: ExactEvmPayloadV2[\"authorization\"] = {\n      from: this.signer.address,\n      to: getAddress(paymentRequirements.payTo),\n      value: paymentRequirements.amount,\n      validAfter: (now - 600).toString(), // 10 minutes before\n      validBefore: (now + paymentRequirements.maxTimeoutSeconds).toString(),\n      nonce,\n    };\n\n    // Sign the authorization\n    const signature = await this.signAuthorization(authorization, paymentRequirements);\n\n    const payload: ExactEvmPayloadV2 = {\n      authorization,\n      signature,\n    };\n\n    return {\n      x402Version,\n      payload,\n    };\n  }\n\n  /**\n   * Sign the EIP-3009 authorization using EIP-712\n   *\n   * @param authorization - The authorization to sign\n   * @param requirements - The payment requirements\n   * @returns Promise resolving to the signature\n   */\n  private async signAuthorization(\n    authorization: ExactEvmPayloadV2[\"authorization\"],\n    requirements: PaymentRequirements,\n  ): Promise<`0x${string}`> {\n    const chainId = parseInt(requirements.network.split(\":\")[1]);\n\n    if (!requirements.extra?.name || !requirements.extra?.version) {\n      throw new Error(\n        `EIP-712 domain parameters (name, version) are required in payment requirements for asset ${requirements.asset}`,\n      );\n    }\n\n    const { name, version } = requirements.extra;\n\n    const domain = {\n      name,\n      version,\n      chainId,\n      verifyingContract: getAddress(requirements.asset),\n    };\n\n    const message = {\n      from: getAddress(authorization.from),\n      to: getAddress(authorization.to),\n      value: BigInt(authorization.value),\n      validAfter: BigInt(authorization.validAfter),\n      validBefore: BigInt(authorization.validBefore),\n      nonce: authorization.nonce,\n    };\n\n    return await this.signer.signTypedData({\n      domain,\n      types: authorizationTypes,\n      primaryType: \"TransferWithAuthorization\",\n      message,\n    });\n  }\n}\n","// EIP-3009 TransferWithAuthorization types for EIP-712 signing\nexport const authorizationTypes = {\n  TransferWithAuthorization: [\n    { name: \"from\", type: \"address\" },\n    { name: \"to\", type: \"address\" },\n    { name: \"value\", type: \"uint256\" },\n    { name: \"validAfter\", type: \"uint256\" },\n    { name: \"validBefore\", type: \"uint256\" },\n    { name: \"nonce\", type: \"bytes32\" },\n  ],\n} as const;\n\n// EIP3009 ABI for transferWithAuthorization function\nexport const eip3009ABI = [\n  {\n    inputs: [\n      { name: \"from\", type: \"address\" },\n      { name: \"to\", type: \"address\" },\n      { name: \"value\", type: \"uint256\" },\n      { name: \"validAfter\", type: \"uint256\" },\n      { name: \"validBefore\", type: \"uint256\" },\n      { name: \"nonce\", type: \"bytes32\" },\n      { name: \"v\", type: \"uint8\" },\n      { name: \"r\", type: \"bytes32\" },\n      { name: \"s\", type: \"bytes32\" },\n    ],\n    name: \"transferWithAuthorization\",\n    outputs: [],\n    stateMutability: \"nonpayable\",\n    type: \"function\",\n  },\n  {\n    inputs: [\n      { name: \"from\", type: \"address\" },\n      { name: \"to\", type: \"address\" },\n      { name: \"value\", type: \"uint256\" },\n      { name: \"validAfter\", type: \"uint256\" },\n      { name: \"validBefore\", type: \"uint256\" },\n      { name: \"nonce\", type: \"bytes32\" },\n      { name: \"signature\", type: \"bytes\" },\n    ],\n    name: \"transferWithAuthorization\",\n    outputs: [],\n    stateMutability: \"nonpayable\",\n    type: \"function\",\n  },\n  {\n    inputs: [{ name: \"account\", type: \"address\" }],\n    name: \"balanceOf\",\n    outputs: [{ name: \"\", type: \"uint256\" }],\n    stateMutability: \"view\",\n    type: \"function\",\n  },\n  {\n    inputs: [],\n    name: \"version\",\n    outputs: [{ name: \"\", type: \"string\" }],\n    stateMutability: \"view\",\n    type: \"function\",\n  },\n] as const;\n","import { toHex } from \"viem\";\nimport { Network } from \"@x402/core/types\";\n\n/**\n * Extract chain ID from network string (e.g., \"base-sepolia\" -> 84532)\n * Used by v1 implementations\n *\n * @param network - The network identifier\n * @returns The numeric chain ID\n */\nexport function getEvmChainId(network: Network): number {\n  const networkMap: Record<string, number> = {\n    base: 8453,\n    \"base-sepolia\": 84532,\n    ethereum: 1,\n    sepolia: 11155111,\n    polygon: 137,\n    \"polygon-amoy\": 80002,\n  };\n  return networkMap[network] || 1;\n}\n\n/**\n * Create a random 32-byte nonce for authorization\n *\n * @returns A hex-encoded 32-byte nonce\n */\nexport function createNonce(): `0x${string}` {\n  // Use dynamic import to avoid require() in ESM context\n  const cryptoObj =\n    typeof globalThis.crypto !== \"undefined\"\n      ? globalThis.crypto\n      : (globalThis as { crypto?: Crypto }).crypto;\n\n  if (!cryptoObj) {\n    throw new Error(\"Crypto API not available\");\n  }\n\n  return toHex(cryptoObj.getRandomValues(new Uint8Array(32)));\n}\n","import {\n  Network,\n  PaymentPayload,\n  PaymentRequirements,\n  SchemeNetworkClient,\n} from \"@x402/core/types\";\nimport { PaymentRequirementsV1 } from \"@x402/core/types/v1\";\nimport { getAddress } from \"viem\";\nimport { authorizationTypes } from \"../../../constants\";\nimport { ClientEvmSigner } from \"../../../signer\";\nimport { ExactEvmPayloadV1 } from \"../../../types\";\nimport { createNonce, getEvmChainId } from \"../../../utils\";\n\n/**\n * EVM client implementation for the Exact payment scheme (V1).\n */\nexport class ExactEvmSchemeV1 implements SchemeNetworkClient {\n  readonly scheme = \"exact\";\n\n  /**\n   * Creates a new ExactEvmClientV1 instance.\n   *\n   * @param signer - The EVM signer for client operations\n   */\n  constructor(private readonly signer: ClientEvmSigner) {}\n\n  /**\n   * Creates a payment payload for the Exact scheme (V1).\n   *\n   * @param x402Version - The x402 protocol version\n   * @param paymentRequirements - The payment requirements\n   * @returns Promise resolving to a payment payload\n   */\n  async createPaymentPayload(\n    x402Version: number,\n    paymentRequirements: PaymentRequirements,\n  ): Promise<\n    Pick<PaymentPayload, \"x402Version\" | \"payload\"> & { scheme: string; network: Network }\n  > {\n    const selectedV1 = paymentRequirements as unknown as PaymentRequirementsV1;\n    const nonce = createNonce();\n    const now = Math.floor(Date.now() / 1000);\n\n    const authorization: ExactEvmPayloadV1[\"authorization\"] = {\n      from: this.signer.address,\n      to: getAddress(selectedV1.payTo),\n      value: selectedV1.maxAmountRequired,\n      validAfter: (now - 600).toString(), // 10 minutes before\n      validBefore: (now + selectedV1.maxTimeoutSeconds).toString(),\n      nonce,\n    };\n\n    // Sign the authorization\n    const signature = await this.signAuthorization(authorization, selectedV1);\n\n    const payload: ExactEvmPayloadV1 = {\n      authorization,\n      signature,\n    };\n\n    return {\n      x402Version,\n      scheme: selectedV1.scheme,\n      network: selectedV1.network,\n      payload,\n    };\n  }\n\n  /**\n   * Sign the EIP-3009 authorization using EIP-712\n   *\n   * @param authorization - The authorization to sign\n   * @param requirements - The payment requirements\n   * @returns Promise resolving to the signature\n   */\n  private async signAuthorization(\n    authorization: ExactEvmPayloadV1[\"authorization\"],\n    requirements: PaymentRequirementsV1,\n  ): Promise<`0x${string}`> {\n    const chainId = getEvmChainId(requirements.network);\n\n    if (!requirements.extra?.name || !requirements.extra?.version) {\n      throw new Error(\n        `EIP-712 domain parameters (name, version) are required in payment requirements for asset ${requirements.asset}`,\n      );\n    }\n\n    const { name, version } = requirements.extra;\n\n    const domain = {\n      name,\n      version,\n      chainId,\n      verifyingContract: getAddress(requirements.asset),\n    };\n\n    const message = {\n      from: getAddress(authorization.from),\n      to: getAddress(authorization.to),\n      value: BigInt(authorization.value),\n      validAfter: BigInt(authorization.validAfter),\n      validBefore: BigInt(authorization.validBefore),\n      nonce: authorization.nonce,\n    };\n\n    return await this.signer.signTypedData({\n      domain,\n      types: authorizationTypes,\n      primaryType: \"TransferWithAuthorization\",\n      message,\n    });\n  }\n}\n","import {\n  PaymentPayload,\n  PaymentPayloadV1,\n  PaymentRequirements,\n  SchemeNetworkFacilitator,\n  SettleResponse,\n  VerifyResponse,\n} from \"@x402/core/types\";\nimport { PaymentRequirementsV1 } from \"@x402/core/types/v1\";\nimport { getAddress, Hex, isAddressEqual, parseErc6492Signature, parseSignature } from \"viem\";\nimport { authorizationTypes, eip3009ABI } from \"../../../constants\";\nimport { FacilitatorEvmSigner } from \"../../../signer\";\nimport { ExactEvmPayloadV1 } from \"../../../types\";\nimport { getEvmChainId } from \"../../../utils\";\n\nexport interface ExactEvmSchemeV1Config {\n  /**\n   * If enabled, the facilitator will deploy ERC-4337 smart wallets\n   * via EIP-6492 when encountering undeployed contract signatures.\n   *\n   * @default false\n   */\n  deployERC4337WithEIP6492?: boolean;\n}\n\n/**\n * EVM facilitator implementation for the Exact payment scheme (V1).\n */\nexport class ExactEvmSchemeV1 implements SchemeNetworkFacilitator {\n  readonly scheme = \"exact\";\n  readonly caipFamily = \"eip155:*\";\n  private readonly config: Required<ExactEvmSchemeV1Config>;\n\n  /**\n   * Creates a new ExactEvmFacilitatorV1 instance.\n   *\n   * @param signer - The EVM signer for facilitator operations\n   * @param config - Optional configuration for the facilitator\n   */\n  constructor(\n    private readonly signer: FacilitatorEvmSigner,\n    config?: ExactEvmSchemeV1Config,\n  ) {\n    this.config = {\n      deployERC4337WithEIP6492: config?.deployERC4337WithEIP6492 ?? false,\n    };\n  }\n\n  /**\n   * Get mechanism-specific extra data for the supported kinds endpoint.\n   * For EVM, no extra data is needed.\n   *\n   * @param _ - The network identifier (unused for EVM)\n   * @returns undefined (EVM has no extra data)\n   */\n  getExtra(_: string): Record<string, unknown> | undefined {\n    return undefined;\n  }\n\n  /**\n   * Get signer addresses used by this facilitator.\n   * Returns all addresses this facilitator can use for signing/settling transactions.\n   *\n   * @param _ - The network identifier (unused for EVM, addresses are network-agnostic)\n   * @returns Array of facilitator wallet addresses\n   */\n  getSigners(_: string): string[] {\n    return [...this.signer.getAddresses()];\n  }\n\n  /**\n   * Verifies a payment payload (V1).\n   *\n   * @param payload - The payment payload to verify\n   * @param requirements - The payment requirements\n   * @returns Promise resolving to verification response\n   */\n  async verify(\n    payload: PaymentPayload,\n    requirements: PaymentRequirements,\n  ): Promise<VerifyResponse> {\n    const requirementsV1 = requirements as unknown as PaymentRequirementsV1;\n    const payloadV1 = payload as unknown as PaymentPayloadV1;\n    const exactEvmPayload = payload.payload as ExactEvmPayloadV1;\n\n    // Verify scheme matches\n    if (payloadV1.scheme !== \"exact\" || requirements.scheme !== \"exact\") {\n      return {\n        isValid: false,\n        invalidReason: \"unsupported_scheme\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Get chain configuration\n    const chainId = getEvmChainId(payloadV1.network);\n\n    if (!requirements.extra?.name || !requirements.extra?.version) {\n      return {\n        isValid: false,\n        invalidReason: \"missing_eip712_domain\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    const { name, version } = requirements.extra;\n    const erc20Address = getAddress(requirements.asset);\n\n    // Verify network matches\n    if (payloadV1.network !== requirements.network) {\n      return {\n        isValid: false,\n        invalidReason: \"network_mismatch\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Build typed data for signature verification\n    const permitTypedData = {\n      types: authorizationTypes,\n      primaryType: \"TransferWithAuthorization\" as const,\n      domain: {\n        name,\n        version,\n        chainId,\n        verifyingContract: erc20Address,\n      },\n      message: {\n        from: exactEvmPayload.authorization.from,\n        to: exactEvmPayload.authorization.to,\n        value: BigInt(exactEvmPayload.authorization.value),\n        validAfter: BigInt(exactEvmPayload.authorization.validAfter),\n        validBefore: BigInt(exactEvmPayload.authorization.validBefore),\n        nonce: exactEvmPayload.authorization.nonce,\n      },\n    };\n\n    // Verify signature\n    try {\n      const recoveredAddress = await this.signer.verifyTypedData({\n        address: exactEvmPayload.authorization.from,\n        ...permitTypedData,\n        signature: exactEvmPayload.signature!,\n      });\n\n      if (!recoveredAddress) {\n        return {\n          isValid: false,\n          invalidReason: \"invalid_exact_evm_payload_signature\",\n          payer: exactEvmPayload.authorization.from,\n        };\n      }\n    } catch {\n      // Signature verification failed - could be an undeployed smart wallet\n      // Check if smart wallet is deployed\n      const signature = exactEvmPayload.signature!;\n      const signatureLength = signature.startsWith(\"0x\") ? signature.length - 2 : signature.length;\n      const isSmartWallet = signatureLength > 130; // 65 bytes = 130 hex chars for EOA\n\n      if (isSmartWallet) {\n        const payerAddress = exactEvmPayload.authorization.from;\n        const bytecode = await this.signer.getCode({ address: payerAddress });\n\n        if (!bytecode || bytecode === \"0x\") {\n          // Wallet is not deployed. Check if it's EIP-6492 with deployment info.\n          // EIP-6492 signatures contain factory address and calldata needed for deployment.\n          // Non-EIP-6492 undeployed wallets cannot succeed (no way to deploy them).\n          const erc6492Data = parseErc6492Signature(signature);\n          const hasDeploymentInfo =\n            erc6492Data.address &&\n            erc6492Data.data &&\n            !isAddressEqual(erc6492Data.address, \"0x0000000000000000000000000000000000000000\");\n\n          if (!hasDeploymentInfo) {\n            // Non-EIP-6492 undeployed smart wallet - will always fail at settlement\n            // since EIP-3009 requires on-chain EIP-1271 validation\n            return {\n              isValid: false,\n              invalidReason: \"invalid_exact_evm_payload_undeployed_smart_wallet\",\n              payer: payerAddress,\n            };\n          }\n          // EIP-6492 signature with deployment info - allow through\n          // Facilitators with sponsored deployment support can handle this in settle()\n        } else {\n          // Wallet is deployed but signature still failed - invalid signature\n          return {\n            isValid: false,\n            invalidReason: \"invalid_exact_evm_payload_signature\",\n            payer: exactEvmPayload.authorization.from,\n          };\n        }\n      } else {\n        // EOA signature failed\n        return {\n          isValid: false,\n          invalidReason: \"invalid_exact_evm_payload_signature\",\n          payer: exactEvmPayload.authorization.from,\n        };\n      }\n    }\n\n    // Verify payment recipient matches\n    if (getAddress(exactEvmPayload.authorization.to) !== getAddress(requirements.payTo)) {\n      return {\n        isValid: false,\n        invalidReason: \"invalid_exact_evm_payload_recipient_mismatch\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Verify validBefore is in the future (with 6 second buffer for block time)\n    const now = Math.floor(Date.now() / 1000);\n    if (BigInt(exactEvmPayload.authorization.validBefore) < BigInt(now + 6)) {\n      return {\n        isValid: false,\n        invalidReason: \"invalid_exact_evm_payload_authorization_valid_before\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Verify validAfter is not in the future\n    if (BigInt(exactEvmPayload.authorization.validAfter) > BigInt(now)) {\n      return {\n        isValid: false,\n        invalidReason: \"invalid_exact_evm_payload_authorization_valid_after\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Check balance\n    try {\n      const balance = (await this.signer.readContract({\n        address: erc20Address,\n        abi: eip3009ABI,\n        functionName: \"balanceOf\",\n        args: [exactEvmPayload.authorization.from],\n      })) as bigint;\n\n      if (BigInt(balance) < BigInt(requirementsV1.maxAmountRequired)) {\n        return {\n          isValid: false,\n          invalidReason: \"insufficient_funds\",\n          payer: exactEvmPayload.authorization.from,\n        };\n      }\n    } catch {\n      // If we can't check balance, continue with other validations\n    }\n\n    // Verify amount is sufficient\n    if (BigInt(exactEvmPayload.authorization.value) < BigInt(requirementsV1.maxAmountRequired)) {\n      return {\n        isValid: false,\n        invalidReason: \"invalid_exact_evm_payload_authorization_value\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    return {\n      isValid: true,\n      invalidReason: undefined,\n      payer: exactEvmPayload.authorization.from,\n    };\n  }\n\n  /**\n   * Settles a payment by executing the transfer (V1).\n   *\n   * @param payload - The payment payload to settle\n   * @param requirements - The payment requirements\n   * @returns Promise resolving to settlement response\n   */\n  async settle(\n    payload: PaymentPayload,\n    requirements: PaymentRequirements,\n  ): Promise<SettleResponse> {\n    const payloadV1 = payload as unknown as PaymentPayloadV1;\n    const exactEvmPayload = payload.payload as ExactEvmPayloadV1;\n\n    // Re-verify before settling\n    const valid = await this.verify(payload, requirements);\n    if (!valid.isValid) {\n      return {\n        success: false,\n        network: payloadV1.network,\n        transaction: \"\",\n        errorReason: valid.invalidReason ?? \"invalid_scheme\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    try {\n      // Parse ERC-6492 signature if applicable\n      const parseResult = parseErc6492Signature(exactEvmPayload.signature!);\n      const { signature, address: factoryAddress, data: factoryCalldata } = parseResult;\n\n      // Deploy ERC-4337 smart wallet via EIP-6492 if configured and needed\n      if (\n        this.config.deployERC4337WithEIP6492 &&\n        factoryAddress &&\n        factoryCalldata &&\n        !isAddressEqual(factoryAddress, \"0x0000000000000000000000000000000000000000\")\n      ) {\n        // Check if smart wallet is already deployed\n        const payerAddress = exactEvmPayload.authorization.from;\n        const bytecode = await this.signer.getCode({ address: payerAddress });\n\n        if (!bytecode || bytecode === \"0x\") {\n          // Wallet not deployed - attempt deployment\n          try {\n            console.log(`Deploying ERC-4337 smart wallet for ${payerAddress} via EIP-6492`);\n\n            // Send the factory calldata directly as a transaction\n            // The factoryCalldata already contains the complete encoded function call\n            const deployTx = await this.signer.sendTransaction({\n              to: factoryAddress as Hex,\n              data: factoryCalldata as Hex,\n            });\n\n            // Wait for deployment transaction\n            await this.signer.waitForTransactionReceipt({ hash: deployTx });\n            console.log(`Successfully deployed smart wallet for ${payerAddress}`);\n          } catch (deployError) {\n            console.error(\"Smart wallet deployment failed:\", deployError);\n            // Deployment failed - cannot proceed\n            throw deployError;\n          }\n        } else {\n          console.log(`Smart wallet for ${payerAddress} already deployed, skipping deployment`);\n        }\n      }\n\n      // Determine if this is an ECDSA signature (EOA) or smart wallet signature\n      // ECDSA signatures are exactly 65 bytes (130 hex chars without 0x)\n      const signatureLength = signature.startsWith(\"0x\") ? signature.length - 2 : signature.length;\n      const isECDSA = signatureLength === 130;\n\n      let tx: Hex;\n      if (isECDSA) {\n        // For EOA wallets, parse signature into v, r, s and use that overload\n        const parsedSig = parseSignature(signature);\n\n        tx = await this.signer.writeContract({\n          address: getAddress(requirements.asset),\n          abi: eip3009ABI,\n          functionName: \"transferWithAuthorization\",\n          args: [\n            getAddress(exactEvmPayload.authorization.from),\n            getAddress(exactEvmPayload.authorization.to),\n            BigInt(exactEvmPayload.authorization.value),\n            BigInt(exactEvmPayload.authorization.validAfter),\n            BigInt(exactEvmPayload.authorization.validBefore),\n            exactEvmPayload.authorization.nonce,\n            (parsedSig.v as number | undefined) || parsedSig.yParity,\n            parsedSig.r,\n            parsedSig.s,\n          ],\n        });\n      } else {\n        // For smart wallets, use the bytes signature overload\n        // The signature contains WebAuthn/P256 or other ERC-1271 compatible signature data\n        tx = await this.signer.writeContract({\n          address: getAddress(requirements.asset),\n          abi: eip3009ABI,\n          functionName: \"transferWithAuthorization\",\n          args: [\n            getAddress(exactEvmPayload.authorization.from),\n            getAddress(exactEvmPayload.authorization.to),\n            BigInt(exactEvmPayload.authorization.value),\n            BigInt(exactEvmPayload.authorization.validAfter),\n            BigInt(exactEvmPayload.authorization.validBefore),\n            exactEvmPayload.authorization.nonce,\n            signature,\n          ],\n        });\n      }\n\n      // Wait for transaction confirmation\n      const receipt = await this.signer.waitForTransactionReceipt({ hash: tx });\n\n      if (receipt.status !== \"success\") {\n        return {\n          success: false,\n          errorReason: \"invalid_transaction_state\",\n          transaction: tx,\n          network: payloadV1.network,\n          payer: exactEvmPayload.authorization.from,\n        };\n      }\n\n      return {\n        success: true,\n        transaction: tx,\n        network: payloadV1.network,\n        payer: exactEvmPayload.authorization.from,\n      };\n    } catch (error) {\n      console.error(\"Failed to settle transaction:\", error);\n      return {\n        success: false,\n        errorReason: \"transaction_failed\",\n        transaction: \"\",\n        network: payloadV1.network,\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n  }\n}\n","export { ExactEvmSchemeV1 } from \"../exact/v1\";\n\nexport const NETWORKS: string[] = [\n  \"abstract\",\n  \"abstract-testnet\",\n  \"base-sepolia\",\n  \"base\",\n  \"avalanche-fuji\",\n  \"avalanche\",\n  \"iotex\",\n  \"sei\",\n  \"sei-testnet\",\n  \"polygon\",\n  \"polygon-amoy\",\n  \"peaq\",\n  \"story\",\n  \"educhain\",\n  \"skale-base-sepolia\",\n];\n","import { x402Client, SelectPaymentRequirements, PaymentPolicy } from \"@x402/core/client\";\nimport { Network } from \"@x402/core/types\";\nimport { ClientEvmSigner } from \"../../signer\";\nimport { ExactEvmScheme } from \"./scheme\";\nimport { ExactEvmSchemeV1 } from \"../v1/client/scheme\";\nimport { NETWORKS } from \"../../v1\";\n\n/**\n * Configuration options for registering EVM schemes to an x402Client\n */\nexport interface EvmClientConfig {\n  /**\n   * The EVM signer to use for creating payment payloads\n   */\n  signer: ClientEvmSigner;\n\n  /**\n   * Optional payment requirements selector function\n   * If not provided, uses the default selector (first available option)\n   */\n  paymentRequirementsSelector?: SelectPaymentRequirements;\n\n  /**\n   * Optional policies to apply to the client\n   */\n  policies?: PaymentPolicy[];\n\n  /**\n   * Optional specific networks to register\n   * If not provided, registers wildcard support (eip155:*)\n   */\n  networks?: Network[];\n}\n\n/**\n * Registers EVM exact payment schemes to an x402Client instance.\n *\n * This function registers:\n * - V2: eip155:* wildcard scheme with ExactEvmScheme (or specific networks if provided)\n * - V1: All supported EVM networks with ExactEvmSchemeV1\n *\n * @param client - The x402Client instance to register schemes to\n * @param config - Configuration for EVM client registration\n * @returns The client instance for chaining\n *\n * @example\n * ```typescript\n * import { registerExactEvmScheme } from \"@x402/evm/exact/client/register\";\n * import { x402Client } from \"@x402/core/client\";\n * import { privateKeyToAccount } from \"viem/accounts\";\n *\n * const account = privateKeyToAccount(\"0x...\");\n * const client = new x402Client();\n * registerExactEvmScheme(client, { signer: account });\n * ```\n */\nexport function registerExactEvmScheme(client: x402Client, config: EvmClientConfig): x402Client {\n  // Register V2 scheme\n  if (config.networks && config.networks.length > 0) {\n    // Register specific networks\n    config.networks.forEach(network => {\n      client.register(network, new ExactEvmScheme(config.signer));\n    });\n  } else {\n    // Register wildcard for all EVM chains\n    client.register(\"eip155:*\", new ExactEvmScheme(config.signer));\n  }\n\n  // Register all V1 networks\n  NETWORKS.forEach(network => {\n    client.registerV1(network as Network, new ExactEvmSchemeV1(config.signer));\n  });\n\n  // Apply policies if provided\n  if (config.policies) {\n    config.policies.forEach(policy => {\n      client.registerPolicy(policy);\n    });\n  }\n\n  return 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+{"version":3,"sources":["../../../../src/exact/client/index.ts","../../../../src/exact/client/eip3009.ts","../../../../src/constants.ts","../../../../src/utils.ts","../../../../src/exact/v1/client/scheme.ts","../../../../src/exact/v1/facilitator/scheme.ts","../../../../src/v1/index.ts","../../../../src/exact/client/permit2.ts","../../../../src/exact/client/scheme.ts","../../../../src/exact/client/register.ts"],"sourcesContent":["export { ExactEvmScheme } from \"./scheme\";\nexport { registerExactEvmScheme } from \"./register\";\nexport type { EvmClientConfig } from \"./register\";\nexport {\n  createPermit2ApprovalTx,\n  getPermit2AllowanceReadParams,\n  erc20AllowanceAbi,\n  type Permit2AllowanceParams,\n} from \"./permit2\";\n","import { PaymentRequirements, PaymentPayloadResult } from \"@x402/core/types\";\nimport { getAddress } from \"viem\";\nimport { authorizationTypes } from \"../../constants\";\nimport { ClientEvmSigner } from \"../../signer\";\nimport { ExactEIP3009Payload } from \"../../types\";\nimport { createNonce } from \"../../utils\";\n\n/**\n * Creates an EIP-3009 (transferWithAuthorization) payload.\n *\n * @param signer - The EVM signer for client operations\n * @param x402Version - The x402 protocol version\n * @param paymentRequirements - The payment requirements\n * @returns Promise resolving to a payment payload result\n */\nexport async function createEIP3009Payload(\n  signer: ClientEvmSigner,\n  x402Version: number,\n  paymentRequirements: PaymentRequirements,\n): Promise<PaymentPayloadResult> {\n  const nonce = createNonce();\n  const now = Math.floor(Date.now() / 1000);\n\n  const authorization: ExactEIP3009Payload[\"authorization\"] = {\n    from: signer.address,\n    to: getAddress(paymentRequirements.payTo),\n    value: paymentRequirements.amount,\n    validAfter: (now - 600).toString(),\n    validBefore: (now + paymentRequirements.maxTimeoutSeconds).toString(),\n    nonce,\n  };\n\n  const signature = await signEIP3009Authorization(signer, authorization, paymentRequirements);\n\n  const payload: ExactEIP3009Payload = {\n    authorization,\n    signature,\n  };\n\n  return {\n    x402Version,\n    payload,\n  };\n}\n\n/**\n * Sign the EIP-3009 authorization using EIP-712.\n *\n * @param signer - The EVM signer\n * @param authorization - The authorization to sign\n * @param requirements - The payment requirements\n * @returns Promise resolving to the signature\n */\nasync function signEIP3009Authorization(\n  signer: ClientEvmSigner,\n  authorization: ExactEIP3009Payload[\"authorization\"],\n  requirements: PaymentRequirements,\n): Promise<`0x${string}`> {\n  const chainId = parseInt(requirements.network.split(\":\")[1]);\n\n  if (!requirements.extra?.name || !requirements.extra?.version) {\n    throw new Error(\n      `EIP-712 domain parameters (name, version) are required in payment requirements for asset ${requirements.asset}`,\n    );\n  }\n\n  const { name, version } = requirements.extra;\n\n  const domain = {\n    name,\n    version,\n    chainId,\n    verifyingContract: getAddress(requirements.asset),\n  };\n\n  const message = {\n    from: getAddress(authorization.from),\n    to: getAddress(authorization.to),\n    value: BigInt(authorization.value),\n    validAfter: BigInt(authorization.validAfter),\n    validBefore: BigInt(authorization.validBefore),\n    nonce: authorization.nonce,\n  };\n\n  return await signer.signTypedData({\n    domain,\n    types: authorizationTypes,\n    primaryType: \"TransferWithAuthorization\",\n    message,\n  });\n}\n","// EIP-3009 TransferWithAuthorization types for EIP-712 signing\nexport const authorizationTypes = {\n  TransferWithAuthorization: [\n    { name: \"from\", type: \"address\" },\n    { name: \"to\", type: \"address\" },\n    { name: \"value\", type: \"uint256\" },\n    { name: \"validAfter\", type: \"uint256\" },\n    { name: \"validBefore\", type: \"uint256\" },\n    { name: \"nonce\", type: \"bytes32\" },\n  ],\n} as const;\n\n/**\n * Permit2 EIP-712 types for signing PermitWitnessTransferFrom.\n * Must match the exact format expected by the Permit2 contract.\n * Note: Types must be in ALPHABETICAL order after the primary type (TokenPermissions < Witness).\n */\nexport const permit2WitnessTypes = {\n  PermitWitnessTransferFrom: [\n    { name: \"permitted\", type: \"TokenPermissions\" },\n    { name: \"spender\", type: \"address\" },\n    { name: \"nonce\", type: \"uint256\" },\n    { name: \"deadline\", type: \"uint256\" },\n    { name: \"witness\", type: \"Witness\" },\n  ],\n  TokenPermissions: [\n    { name: \"token\", type: \"address\" },\n    { name: \"amount\", type: \"uint256\" },\n  ],\n  Witness: [\n    { name: \"to\", type: \"address\" },\n    { name: \"validAfter\", type: \"uint256\" },\n    { name: \"extra\", type: \"bytes\" },\n  ],\n} as const;\n\n// EIP3009 ABI for transferWithAuthorization function\nexport const eip3009ABI = [\n  {\n    inputs: [\n      { name: \"from\", type: \"address\" },\n      { name: \"to\", type: \"address\" },\n      { name: \"value\", type: \"uint256\" },\n      { name: \"validAfter\", type: \"uint256\" },\n      { name: \"validBefore\", type: \"uint256\" },\n      { name: \"nonce\", type: \"bytes32\" },\n      { name: \"v\", type: \"uint8\" },\n      { name: \"r\", type: \"bytes32\" },\n      { name: \"s\", type: \"bytes32\" },\n    ],\n    name: \"transferWithAuthorization\",\n    outputs: [],\n    stateMutability: \"nonpayable\",\n    type: \"function\",\n  },\n  {\n    inputs: [\n      { name: \"from\", type: \"address\" },\n      { name: \"to\", type: \"address\" },\n      { name: \"value\", type: \"uint256\" },\n      { name: \"validAfter\", type: \"uint256\" },\n      { name: \"validBefore\", type: \"uint256\" },\n      { name: \"nonce\", type: \"bytes32\" },\n      { name: \"signature\", type: \"bytes\" },\n    ],\n    name: \"transferWithAuthorization\",\n    outputs: [],\n    stateMutability: \"nonpayable\",\n    type: \"function\",\n  },\n  {\n    inputs: [{ name: \"account\", type: \"address\" }],\n    name: \"balanceOf\",\n    outputs: [{ name: \"\", type: \"uint256\" }],\n    stateMutability: \"view\",\n    type: \"function\",\n  },\n  {\n    inputs: [],\n    name: \"version\",\n    outputs: [{ name: \"\", type: \"string\" }],\n    stateMutability: \"view\",\n    type: \"function\",\n  },\n] as const;\n\n/**\n * Canonical Permit2 contract address.\n * Same address on all EVM chains via CREATE2 deployment.\n *\n * @see https://github.com/Uniswap/permit2\n */\nexport const PERMIT2_ADDRESS = \"0x000000000022D473030F116dDEE9F6B43aC78BA3\" as const;\n\n/**\n * x402ExactPermit2Proxy contract address.\n * Vanity address: 0x4020...0001 for easy recognition.\n * This address is deterministic based on:\n * - Arachnid's deterministic deployer (0x4e59b44847b379578588920cA78FbF26c0B4956C)\n * - Vanity-mined salt for prefix 0x4020 and suffix 0001\n * - Contract bytecode + constructor args (PERMIT2_ADDRESS)\n */\nexport const x402ExactPermit2ProxyAddress = \"0x4020615294c913F045dc10f0a5cdEbd86c280001\" as const;\n\n/**\n * x402UptoPermit2Proxy contract address.\n * Vanity address: 0x4020...0002 for easy recognition.\n * This address is deterministic based on:\n * - Arachnid's deterministic deployer (0x4e59b44847b379578588920cA78FbF26c0B4956C)\n * - Vanity-mined salt for prefix 0x4020 and suffix 0002\n * - Contract bytecode + constructor args (PERMIT2_ADDRESS)\n */\nexport const x402UptoPermit2ProxyAddress = \"0x4020633461b2895a48930Ff97eE8fCdE8E520002\" as const;\n\n/**\n * x402UptoPermit2Proxy ABI - settle function for upto payment scheme (variable amounts).\n */\nexport const x402UptoPermit2ProxyABI = [\n  {\n    type: \"function\",\n    name: \"PERMIT2\",\n    inputs: [],\n    outputs: [{ name: \"\", type: \"address\", internalType: \"contract ISignatureTransfer\" }],\n    stateMutability: \"view\",\n  },\n  {\n    type: \"function\",\n    name: 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},\n  { type: \"event\", name: \"SettledWithPermit\", inputs: [], anonymous: false },\n  { type: \"error\", name: \"AlreadyInitialized\", inputs: [] },\n  { type: \"error\", name: \"AmountExceedsPermitted\", inputs: [] },\n  { type: \"error\", name: \"InvalidDestination\", inputs: [] },\n  { type: \"error\", name: \"InvalidOwner\", inputs: [] },\n  { type: \"error\", name: \"InvalidPermit2Address\", inputs: [] },\n  { type: \"error\", name: \"PaymentTooEarly\", inputs: [] },\n  { type: \"error\", name: \"ReentrancyGuardReentrantCall\", inputs: [] },\n] as const;\n\n/**\n * x402ExactPermit2Proxy ABI - settle function for exact payment scheme.\n */\nexport const x402ExactPermit2ProxyABI = [\n  {\n    type: \"function\",\n    name: \"PERMIT2\",\n    inputs: [],\n    outputs: [{ name: \"\", type: \"address\", internalType: \"contract ISignatureTransfer\" }],\n    stateMutability: \"view\",\n  },\n  {\n    type: \"function\",\n    name: \"WITNESS_TYPEHASH\",\n    inputs: [],\n    outputs: 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    { name: \"amount\", type: \"uint256\", internalType: \"uint256\" },\n            ],\n          },\n          { name: \"nonce\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"deadline\", type: \"uint256\", internalType: \"uint256\" },\n        ],\n      },\n      { name: \"owner\", type: \"address\", internalType: \"address\" },\n      {\n        name: \"witness\",\n        type: \"tuple\",\n        internalType: \"struct x402BasePermit2Proxy.Witness\",\n        components: [\n          { name: \"to\", type: \"address\", internalType: \"address\" },\n          { name: \"validAfter\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"extra\", type: \"bytes\", internalType: \"bytes\" },\n        ],\n      },\n      { name: \"signature\", type: \"bytes\", internalType: \"bytes\" },\n    ],\n    outputs: [],\n    stateMutability: \"nonpayable\",\n  },\n  {\n    type: \"function\",\n    name: \"settleWithPermit\",\n    inputs: [\n      {\n        name: \"permit2612\",\n        type: \"tuple\",\n        internalType: \"struct x402BasePermit2Proxy.EIP2612Permit\",\n        components: [\n          { name: \"value\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"deadline\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"r\", type: \"bytes32\", internalType: \"bytes32\" },\n          { name: \"s\", type: \"bytes32\", internalType: \"bytes32\" },\n          { name: \"v\", type: \"uint8\", internalType: \"uint8\" },\n        ],\n      },\n      {\n        name: \"permit\",\n        type: \"tuple\",\n        internalType: \"struct ISignatureTransfer.PermitTransferFrom\",\n        components: [\n          {\n            name: \"permitted\",\n            type: \"tuple\",\n            internalType: \"struct ISignatureTransfer.TokenPermissions\",\n            components: [\n              { name: \"token\", type: \"address\", internalType: \"address\" },\n              { name: \"amount\", type: \"uint256\", internalType: \"uint256\" },\n            ],\n          },\n          { name: \"nonce\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"deadline\", type: \"uint256\", internalType: \"uint256\" },\n        ],\n      },\n      { name: \"owner\", type: \"address\", internalType: \"address\" },\n      {\n        name: \"witness\",\n        type: \"tuple\",\n        internalType: \"struct x402BasePermit2Proxy.Witness\",\n        components: [\n          { name: \"to\", type: \"address\", internalType: \"address\" },\n          { name: \"validAfter\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"extra\", type: \"bytes\", internalType: \"bytes\" },\n        ],\n      },\n      { name: \"signature\", type: \"bytes\", internalType: \"bytes\" },\n    ],\n    outputs: [],\n    stateMutability: \"nonpayable\",\n  },\n  { type: \"event\", name: \"Settled\", inputs: [], anonymous: false },\n  { type: \"event\", name: \"SettledWithPermit\", inputs: [], anonymous: false },\n  { type: \"error\", name: \"AlreadyInitialized\", inputs: [] },\n  { type: \"error\", name: \"InvalidDestination\", inputs: [] },\n  { type: \"error\", name: \"InvalidOwner\", inputs: [] },\n  { type: \"error\", name: \"InvalidPermit2Address\", inputs: [] },\n  { type: \"error\", name: \"PaymentTooEarly\", inputs: [] },\n  { type: \"error\", name: \"ReentrancyGuardReentrantCall\", inputs: [] },\n] as const;\n","import { toHex } from \"viem\";\nimport { EVM_NETWORK_CHAIN_ID_MAP, EvmNetworkV1 } from \"./v1\";\n\n/**\n * Extract chain ID from network string (e.g., \"base-sepolia\" -> 84532)\n * Used by v1 implementations\n *\n * @param network - The network identifier\n * @returns The numeric chain ID\n * @throws Error if the network is not supported\n */\nexport function getEvmChainId(network: EvmNetworkV1): number {\n  const chainId = EVM_NETWORK_CHAIN_ID_MAP[network];\n  if (!chainId) {\n    throw new Error(`Unsupported network: ${network}`);\n  }\n  return chainId;\n}\n\n/**\n * Get the crypto object from the global scope.\n *\n * @returns The crypto object\n * @throws Error if crypto API is not available\n */\nfunction getCrypto(): Crypto {\n  const cryptoObj = globalThis.crypto as Crypto | undefined;\n  if (!cryptoObj) {\n    throw new Error(\"Crypto API not available\");\n  }\n  return cryptoObj;\n}\n\n/**\n * Create a random 32-byte nonce for EIP-3009 authorization.\n *\n * @returns A hex-encoded 32-byte nonce\n */\nexport function createNonce(): `0x${string}` {\n  return toHex(getCrypto().getRandomValues(new Uint8Array(32)));\n}\n\n/**\n * Creates a random 256-bit nonce for Permit2.\n * Permit2 uses uint256 nonces (not bytes32 like EIP-3009).\n *\n * @returns A string representation of the random nonce\n */\nexport function createPermit2Nonce(): string {\n  const randomBytes = getCrypto().getRandomValues(new Uint8Array(32));\n  return BigInt(toHex(randomBytes)).toString();\n}\n","import {\n  Network,\n  PaymentPayload,\n  PaymentRequirements,\n  SchemeNetworkClient,\n} from \"@x402/core/types\";\nimport { PaymentRequirementsV1 } from \"@x402/core/types/v1\";\nimport { getAddress } from \"viem\";\nimport { authorizationTypes } from \"../../../constants\";\nimport { ClientEvmSigner } from \"../../../signer\";\nimport { ExactEvmPayloadV1 } from \"../../../types\";\nimport { createNonce, getEvmChainId } from \"../../../utils\";\nimport { EvmNetworkV1 } from \"../../../v1\";\n\n/**\n * EVM client implementation for the Exact payment scheme (V1).\n */\nexport class ExactEvmSchemeV1 implements SchemeNetworkClient {\n  readonly scheme = \"exact\";\n\n  /**\n   * Creates a new ExactEvmClientV1 instance.\n   *\n   * @param signer - The EVM signer for client operations\n   */\n  constructor(private readonly signer: ClientEvmSigner) {}\n\n  /**\n   * Creates a payment payload for the Exact scheme (V1).\n   *\n   * @param x402Version - The x402 protocol version\n   * @param paymentRequirements - The payment requirements\n   * @returns Promise resolving to a payment payload\n   */\n  async createPaymentPayload(\n    x402Version: number,\n    paymentRequirements: PaymentRequirements,\n  ): Promise<\n    Pick<PaymentPayload, \"x402Version\" | \"payload\"> & { scheme: string; network: Network }\n  > {\n    const selectedV1 = paymentRequirements as unknown as PaymentRequirementsV1;\n    const nonce = createNonce();\n    const now = Math.floor(Date.now() / 1000);\n\n    const authorization: ExactEvmPayloadV1[\"authorization\"] = {\n      from: this.signer.address,\n      to: getAddress(selectedV1.payTo),\n      value: selectedV1.maxAmountRequired,\n      validAfter: (now - 600).toString(), // 10 minutes before\n      validBefore: (now + selectedV1.maxTimeoutSeconds).toString(),\n      nonce,\n    };\n\n    // Sign the authorization\n    const signature = await this.signAuthorization(authorization, selectedV1);\n\n    const payload: ExactEvmPayloadV1 = {\n      authorization,\n      signature,\n    };\n\n    return {\n      x402Version,\n      scheme: selectedV1.scheme,\n      network: selectedV1.network,\n      payload,\n    };\n  }\n\n  /**\n   * Sign the EIP-3009 authorization using EIP-712\n   *\n   * @param authorization - The authorization to sign\n   * @param requirements - The payment requirements\n   * @returns Promise resolving to the signature\n   */\n  private async signAuthorization(\n    authorization: ExactEvmPayloadV1[\"authorization\"],\n    requirements: PaymentRequirementsV1,\n  ): Promise<`0x${string}`> {\n    const chainId = getEvmChainId(requirements.network as EvmNetworkV1);\n\n    if (!requirements.extra?.name || !requirements.extra?.version) {\n      throw new Error(\n        `EIP-712 domain parameters (name, version) are required in payment requirements for asset ${requirements.asset}`,\n      );\n    }\n\n    const { name, version } = requirements.extra;\n\n    const domain = {\n      name,\n      version,\n      chainId,\n      verifyingContract: getAddress(requirements.asset),\n    };\n\n    const message = {\n      from: getAddress(authorization.from),\n      to: getAddress(authorization.to),\n      value: BigInt(authorization.value),\n      validAfter: BigInt(authorization.validAfter),\n      validBefore: BigInt(authorization.validBefore),\n      nonce: authorization.nonce,\n    };\n\n    return await this.signer.signTypedData({\n      domain,\n      types: authorizationTypes,\n      primaryType: \"TransferWithAuthorization\",\n      message,\n    });\n  }\n}\n","import {\n  PaymentPayload,\n  PaymentPayloadV1,\n  PaymentRequirements,\n  SchemeNetworkFacilitator,\n  SettleResponse,\n  VerifyResponse,\n} from \"@x402/core/types\";\nimport { PaymentRequirementsV1 } from \"@x402/core/types/v1\";\nimport { getAddress, Hex, isAddressEqual, parseErc6492Signature, parseSignature } from \"viem\";\nimport { authorizationTypes, eip3009ABI } from \"../../../constants\";\nimport { FacilitatorEvmSigner } from \"../../../signer\";\nimport { ExactEvmPayloadV1 } from \"../../../types\";\nimport { getEvmChainId } from \"../../../utils\";\nimport { EvmNetworkV1 } from \"../../../v1\";\n\nexport interface ExactEvmSchemeV1Config {\n  /**\n   * If enabled, the facilitator will deploy ERC-4337 smart wallets\n   * via EIP-6492 when encountering undeployed contract signatures.\n   *\n   * @default false\n   */\n  deployERC4337WithEIP6492?: boolean;\n}\n\n/**\n * EVM facilitator implementation for the Exact payment scheme (V1).\n */\nexport class ExactEvmSchemeV1 implements SchemeNetworkFacilitator {\n  readonly scheme = \"exact\";\n  readonly caipFamily = \"eip155:*\";\n  private readonly config: Required<ExactEvmSchemeV1Config>;\n\n  /**\n   * Creates a new ExactEvmFacilitatorV1 instance.\n   *\n   * @param signer - The EVM signer for facilitator operations\n   * @param config - Optional configuration for the facilitator\n   */\n  constructor(\n    private readonly signer: FacilitatorEvmSigner,\n    config?: ExactEvmSchemeV1Config,\n  ) {\n    this.config = {\n      deployERC4337WithEIP6492: config?.deployERC4337WithEIP6492 ?? false,\n    };\n  }\n\n  /**\n   * Get mechanism-specific extra data for the supported kinds endpoint.\n   * For EVM, no extra data is needed.\n   *\n   * @param _ - The network identifier (unused for EVM)\n   * @returns undefined (EVM has no extra data)\n   */\n  getExtra(_: string): Record<string, unknown> | undefined {\n    return undefined;\n  }\n\n  /**\n   * Get signer addresses used by this facilitator.\n   * Returns all addresses this facilitator can use for signing/settling transactions.\n   *\n   * @param _ - The network identifier (unused for EVM, addresses are network-agnostic)\n   * @returns Array of facilitator wallet addresses\n   */\n  getSigners(_: string): string[] {\n    return [...this.signer.getAddresses()];\n  }\n\n  /**\n   * Verifies a payment payload (V1).\n   *\n   * @param payload - The payment payload to verify\n   * @param requirements - The payment requirements\n   * @returns Promise resolving to verification response\n   */\n  async verify(\n    payload: PaymentPayload,\n    requirements: PaymentRequirements,\n  ): Promise<VerifyResponse> {\n    const requirementsV1 = requirements as unknown as PaymentRequirementsV1;\n    const payloadV1 = payload as unknown as PaymentPayloadV1;\n    const exactEvmPayload = payload.payload as ExactEvmPayloadV1;\n\n    // Verify scheme matches\n    if (payloadV1.scheme !== \"exact\" || requirements.scheme !== \"exact\") {\n      return {\n        isValid: false,\n        invalidReason: \"unsupported_scheme\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Get chain configuration\n    let chainId: number;\n    try {\n      chainId = getEvmChainId(payloadV1.network as EvmNetworkV1);\n    } catch {\n      return {\n        isValid: false,\n        invalidReason: `invalid_network`,\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    if (!requirements.extra?.name || !requirements.extra?.version) {\n      return {\n        isValid: false,\n        invalidReason: \"missing_eip712_domain\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    const { name, version } = requirements.extra;\n    const erc20Address = getAddress(requirements.asset);\n\n    // Verify network matches\n    if (payloadV1.network !== requirements.network) {\n      return {\n        isValid: false,\n        invalidReason: \"network_mismatch\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Build typed data for signature verification\n    const permitTypedData = {\n      types: authorizationTypes,\n      primaryType: \"TransferWithAuthorization\" as const,\n      domain: {\n        name,\n        version,\n        chainId,\n        verifyingContract: erc20Address,\n      },\n      message: {\n        from: exactEvmPayload.authorization.from,\n        to: exactEvmPayload.authorization.to,\n        value: BigInt(exactEvmPayload.authorization.value),\n        validAfter: BigInt(exactEvmPayload.authorization.validAfter),\n        validBefore: BigInt(exactEvmPayload.authorization.validBefore),\n        nonce: exactEvmPayload.authorization.nonce,\n      },\n    };\n\n    // Verify signature\n    try {\n      const recoveredAddress = await this.signer.verifyTypedData({\n        address: exactEvmPayload.authorization.from,\n        ...permitTypedData,\n        signature: exactEvmPayload.signature!,\n      });\n\n      if (!recoveredAddress) {\n        return {\n          isValid: false,\n          invalidReason: \"invalid_exact_evm_payload_signature\",\n          payer: exactEvmPayload.authorization.from,\n        };\n      }\n    } catch {\n      // Signature verification failed - could be an undeployed smart wallet\n      // Check if smart wallet is deployed\n      const signature = exactEvmPayload.signature!;\n      const signatureLength = signature.startsWith(\"0x\") ? signature.length - 2 : signature.length;\n      const isSmartWallet = signatureLength > 130; // 65 bytes = 130 hex chars for EOA\n\n      if (isSmartWallet) {\n        const payerAddress = exactEvmPayload.authorization.from;\n        const bytecode = await this.signer.getCode({ address: payerAddress });\n\n        if (!bytecode || bytecode === \"0x\") {\n          // Wallet is not deployed. Check if it's EIP-6492 with deployment info.\n          // EIP-6492 signatures contain factory address and calldata needed for deployment.\n          // Non-EIP-6492 undeployed wallets cannot succeed (no way to deploy them).\n          const erc6492Data = parseErc6492Signature(signature);\n          const hasDeploymentInfo =\n            erc6492Data.address &&\n            erc6492Data.data &&\n            !isAddressEqual(erc6492Data.address, \"0x0000000000000000000000000000000000000000\");\n\n          if (!hasDeploymentInfo) {\n            // Non-EIP-6492 undeployed smart wallet - will always fail at settlement\n            // since EIP-3009 requires on-chain EIP-1271 validation\n            return {\n              isValid: false,\n              invalidReason: \"invalid_exact_evm_payload_undeployed_smart_wallet\",\n              payer: payerAddress,\n            };\n          }\n          // EIP-6492 signature with deployment info - allow through\n          // Facilitators with sponsored deployment support can handle this in settle()\n        } else {\n          // Wallet is deployed but signature still failed - invalid signature\n          return {\n            isValid: false,\n            invalidReason: \"invalid_exact_evm_payload_signature\",\n            payer: exactEvmPayload.authorization.from,\n          };\n        }\n      } else {\n        // EOA signature failed\n        return {\n          isValid: false,\n          invalidReason: \"invalid_exact_evm_payload_signature\",\n          payer: exactEvmPayload.authorization.from,\n        };\n      }\n    }\n\n    // Verify payment recipient matches\n    if (getAddress(exactEvmPayload.authorization.to) !== getAddress(requirements.payTo)) {\n      return {\n        isValid: false,\n        invalidReason: \"invalid_exact_evm_payload_recipient_mismatch\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Verify validBefore is in the future (with 6 second buffer for block time)\n    const now = Math.floor(Date.now() / 1000);\n    if (BigInt(exactEvmPayload.authorization.validBefore) < BigInt(now + 6)) {\n      return {\n        isValid: false,\n        invalidReason: \"invalid_exact_evm_payload_authorization_valid_before\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Verify validAfter is not in the future\n    if (BigInt(exactEvmPayload.authorization.validAfter) > BigInt(now)) {\n      return {\n        isValid: false,\n        invalidReason: \"invalid_exact_evm_payload_authorization_valid_after\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Check balance\n    try {\n      const balance = (await this.signer.readContract({\n        address: erc20Address,\n        abi: eip3009ABI,\n        functionName: \"balanceOf\",\n        args: [exactEvmPayload.authorization.from],\n      })) as bigint;\n\n      if (BigInt(balance) < BigInt(requirementsV1.maxAmountRequired)) {\n        return {\n          isValid: false,\n          invalidReason: \"insufficient_funds\",\n          invalidMessage: `Insufficient funds to complete the payment. Required: ${requirementsV1.maxAmountRequired} ${requirements.asset}, Available: ${balance.toString()} ${requirements.asset}. Please add funds to your wallet and try again.`,\n          payer: exactEvmPayload.authorization.from,\n        };\n      }\n    } catch {\n      // If we can't check balance, continue with other validations\n    }\n\n    // Verify amount is sufficient\n    if (BigInt(exactEvmPayload.authorization.value) < BigInt(requirementsV1.maxAmountRequired)) {\n      return {\n        isValid: false,\n        invalidReason: \"invalid_exact_evm_payload_authorization_value\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    return {\n      isValid: true,\n      invalidReason: undefined,\n      payer: exactEvmPayload.authorization.from,\n    };\n  }\n\n  /**\n   * Settles a payment by executing the transfer (V1).\n   *\n   * @param payload - The payment payload to settle\n   * @param requirements - The payment requirements\n   * @returns Promise resolving to settlement response\n   */\n  async settle(\n    payload: PaymentPayload,\n    requirements: PaymentRequirements,\n  ): Promise<SettleResponse> {\n    const payloadV1 = payload as unknown as PaymentPayloadV1;\n    const exactEvmPayload = payload.payload as ExactEvmPayloadV1;\n\n    // Re-verify before settling\n    const valid = await this.verify(payload, requirements);\n    if (!valid.isValid) {\n      return {\n        success: false,\n        network: payloadV1.network,\n        transaction: \"\",\n        errorReason: valid.invalidReason ?? \"invalid_scheme\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    try {\n      // Parse ERC-6492 signature if applicable\n      const parseResult = parseErc6492Signature(exactEvmPayload.signature!);\n      const { signature, address: factoryAddress, data: factoryCalldata } = parseResult;\n\n      // Deploy ERC-4337 smart wallet via EIP-6492 if configured and needed\n      if (\n        this.config.deployERC4337WithEIP6492 &&\n        factoryAddress &&\n        factoryCalldata &&\n        !isAddressEqual(factoryAddress, \"0x0000000000000000000000000000000000000000\")\n      ) {\n        // Check if smart wallet is already deployed\n        const payerAddress = exactEvmPayload.authorization.from;\n        const bytecode = await this.signer.getCode({ address: payerAddress });\n\n        if (!bytecode || bytecode === \"0x\") {\n          // Wallet not deployed - attempt deployment\n          try {\n            console.log(`Deploying ERC-4337 smart wallet for ${payerAddress} via EIP-6492`);\n\n            // Send the factory calldata directly as a transaction\n            // The factoryCalldata already contains the complete encoded function call\n            const deployTx = await this.signer.sendTransaction({\n              to: factoryAddress as Hex,\n              data: factoryCalldata as Hex,\n            });\n\n            // Wait for deployment transaction\n            await this.signer.waitForTransactionReceipt({ hash: deployTx });\n            console.log(`Successfully deployed smart wallet for ${payerAddress}`);\n          } catch (deployError) {\n            console.error(\"Smart wallet deployment failed:\", deployError);\n            // Deployment failed - cannot proceed\n            throw deployError;\n          }\n        } else {\n          console.log(`Smart wallet for ${payerAddress} already deployed, skipping deployment`);\n        }\n      }\n\n      // Determine if this is an ECDSA signature (EOA) or smart wallet signature\n      // ECDSA signatures are exactly 65 bytes (130 hex chars without 0x)\n      const signatureLength = signature.startsWith(\"0x\") ? signature.length - 2 : signature.length;\n      const isECDSA = signatureLength === 130;\n\n      let tx: Hex;\n      if (isECDSA) {\n        // For EOA wallets, parse signature into v, r, s and use that overload\n        const parsedSig = parseSignature(signature);\n\n        tx = await this.signer.writeContract({\n          address: getAddress(requirements.asset),\n          abi: eip3009ABI,\n          functionName: \"transferWithAuthorization\",\n          args: [\n            getAddress(exactEvmPayload.authorization.from),\n            getAddress(exactEvmPayload.authorization.to),\n            BigInt(exactEvmPayload.authorization.value),\n            BigInt(exactEvmPayload.authorization.validAfter),\n            BigInt(exactEvmPayload.authorization.validBefore),\n            exactEvmPayload.authorization.nonce,\n            (parsedSig.v as number | undefined) || parsedSig.yParity,\n            parsedSig.r,\n            parsedSig.s,\n          ],\n        });\n      } else {\n        // For smart wallets, use the bytes signature overload\n        // The signature contains WebAuthn/P256 or other ERC-1271 compatible signature data\n        tx = await this.signer.writeContract({\n          address: getAddress(requirements.asset),\n          abi: eip3009ABI,\n          functionName: \"transferWithAuthorization\",\n          args: [\n            getAddress(exactEvmPayload.authorization.from),\n            getAddress(exactEvmPayload.authorization.to),\n            BigInt(exactEvmPayload.authorization.value),\n            BigInt(exactEvmPayload.authorization.validAfter),\n            BigInt(exactEvmPayload.authorization.validBefore),\n            exactEvmPayload.authorization.nonce,\n            signature,\n          ],\n        });\n      }\n\n      // Wait for transaction confirmation\n      const receipt = await this.signer.waitForTransactionReceipt({ hash: tx });\n\n      if (receipt.status !== \"success\") {\n        return {\n          success: false,\n          errorReason: \"invalid_transaction_state\",\n          transaction: tx,\n          network: payloadV1.network,\n          payer: exactEvmPayload.authorization.from,\n        };\n      }\n\n      return {\n        success: true,\n        transaction: tx,\n        network: payloadV1.network,\n        payer: exactEvmPayload.authorization.from,\n      };\n    } catch (error) {\n      console.error(\"Failed to settle transaction:\", error);\n      return {\n        success: false,\n        errorReason: \"transaction_failed\",\n        transaction: \"\",\n        network: payloadV1.network,\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n  }\n}\n","export { ExactEvmSchemeV1 } from \"../exact/v1\";\n\nexport const EVM_NETWORK_CHAIN_ID_MAP = {\n  ethereum: 1,\n  sepolia: 11155111,\n  abstract: 2741,\n  \"abstract-testnet\": 11124,\n  \"base-sepolia\": 84532,\n  base: 8453,\n  \"avalanche-fuji\": 43113,\n  avalanche: 43114,\n  iotex: 4689,\n  sei: 1329,\n  \"sei-testnet\": 1328,\n  polygon: 137,\n  \"polygon-amoy\": 80002,\n  peaq: 3338,\n  story: 1514,\n  educhain: 41923,\n  \"skale-base-sepolia\": 324705682,\n} as const;\n\nexport type EvmNetworkV1 = keyof typeof EVM_NETWORK_CHAIN_ID_MAP;\n\nexport const NETWORKS: string[] = Object.keys(EVM_NETWORK_CHAIN_ID_MAP);\n","import { PaymentRequirements, PaymentPayloadResult } from \"@x402/core/types\";\nimport { encodeFunctionData, getAddress } from \"viem\";\nimport {\n  permit2WitnessTypes,\n  PERMIT2_ADDRESS,\n  x402ExactPermit2ProxyAddress,\n} from \"../../constants\";\nimport { ClientEvmSigner } from \"../../signer\";\nimport { ExactPermit2Payload } from \"../../types\";\nimport { createPermit2Nonce } from \"../../utils\";\n\n/** Maximum uint256 value for unlimited approval. */\nconst MAX_UINT256 = BigInt(\"0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff\");\n\n/**\n * Creates a Permit2 payload using the x402Permit2Proxy witness pattern.\n * The spender is set to x402Permit2Proxy, which enforces that funds\n * can only be sent to the witness.to address.\n *\n * @param signer - The EVM signer for client operations\n * @param x402Version - The x402 protocol version\n * @param paymentRequirements - The payment requirements\n * @returns Promise resolving to a payment payload result\n */\nexport async function createPermit2Payload(\n  signer: ClientEvmSigner,\n  x402Version: number,\n  paymentRequirements: PaymentRequirements,\n): Promise<PaymentPayloadResult> {\n  const now = Math.floor(Date.now() / 1000);\n  const nonce = createPermit2Nonce();\n\n  // Lower time bound - allow some clock skew\n  const validAfter = (now - 600).toString();\n  // Upper time bound is enforced by Permit2's deadline field\n  const deadline = (now + paymentRequirements.maxTimeoutSeconds).toString();\n\n  const permit2Authorization: ExactPermit2Payload[\"permit2Authorization\"] = {\n    from: signer.address,\n    permitted: {\n      token: getAddress(paymentRequirements.asset),\n      amount: paymentRequirements.amount,\n    },\n    spender: x402ExactPermit2ProxyAddress,\n    nonce,\n    deadline,\n    witness: {\n      to: getAddress(paymentRequirements.payTo),\n      validAfter,\n      extra: \"0x\",\n    },\n  };\n\n  const signature = await signPermit2Authorization(\n    signer,\n    permit2Authorization,\n    paymentRequirements,\n  );\n\n  const payload: ExactPermit2Payload = {\n    signature,\n    permit2Authorization,\n  };\n\n  return {\n    x402Version,\n    payload,\n  };\n}\n\n/**\n * Sign the Permit2 authorization using EIP-712 with witness data.\n * The signature authorizes the x402Permit2Proxy to transfer tokens on behalf of the signer.\n *\n * @param signer - The EVM signer\n * @param permit2Authorization - The Permit2 authorization parameters\n * @param requirements - The payment requirements\n * @returns Promise resolving to the signature\n */\nasync function signPermit2Authorization(\n  signer: ClientEvmSigner,\n  permit2Authorization: ExactPermit2Payload[\"permit2Authorization\"],\n  requirements: PaymentRequirements,\n): Promise<`0x${string}`> {\n  const chainId = parseInt(requirements.network.split(\":\")[1]);\n\n  const domain = {\n    name: \"Permit2\",\n    chainId,\n    verifyingContract: PERMIT2_ADDRESS,\n  };\n\n  const message = {\n    permitted: {\n      token: getAddress(permit2Authorization.permitted.token),\n      amount: BigInt(permit2Authorization.permitted.amount),\n    },\n    spender: getAddress(permit2Authorization.spender),\n    nonce: BigInt(permit2Authorization.nonce),\n    deadline: BigInt(permit2Authorization.deadline),\n    witness: {\n      to: getAddress(permit2Authorization.witness.to),\n      validAfter: BigInt(permit2Authorization.witness.validAfter),\n      extra: permit2Authorization.witness.extra,\n    },\n  };\n\n  return await signer.signTypedData({\n    domain,\n    types: permit2WitnessTypes,\n    primaryType: \"PermitWitnessTransferFrom\",\n    message,\n  });\n}\n\n/**\n * ERC20 approve ABI for encoding approval transactions.\n */\nconst erc20ApproveAbi = [\n  {\n    type: \"function\",\n    name: \"approve\",\n    inputs: [\n      { name: \"spender\", type: \"address\" },\n      { name: \"amount\", type: \"uint256\" },\n    ],\n    outputs: [{ type: \"bool\" }],\n    stateMutability: \"nonpayable\",\n  },\n] as const;\n\n/**\n * ERC20 allowance ABI for checking approval status.\n */\nexport const erc20AllowanceAbi = [\n  {\n    type: \"function\",\n    name: \"allowance\",\n    inputs: [\n      { name: \"owner\", type: \"address\" },\n      { name: \"spender\", type: \"address\" },\n    ],\n    outputs: [{ type: \"uint256\" }],\n    stateMutability: \"view\",\n  },\n] as const;\n\n/**\n * Creates transaction data to approve Permit2 to spend tokens.\n * The user sends this transaction (paying gas) before using Permit2 flow.\n *\n * @param tokenAddress - The ERC20 token contract address\n * @returns Transaction data to send for approval\n *\n * @example\n * ```typescript\n * const tx = createPermit2ApprovalTx(\"0x...\");\n * await walletClient.sendTransaction({\n *   to: tx.to,\n *   data: tx.data,\n * });\n * ```\n */\nexport function createPermit2ApprovalTx(tokenAddress: `0x${string}`): {\n  to: `0x${string}`;\n  data: `0x${string}`;\n} {\n  const data = encodeFunctionData({\n    abi: erc20ApproveAbi,\n    functionName: \"approve\",\n    args: [PERMIT2_ADDRESS, MAX_UINT256],\n  });\n\n  return {\n    to: getAddress(tokenAddress),\n    data,\n  };\n}\n\n/**\n * Parameters for checking Permit2 allowance.\n * Application provides these to check if approval is needed.\n */\nexport interface Permit2AllowanceParams {\n  tokenAddress: `0x${string}`;\n  ownerAddress: `0x${string}`;\n}\n\n/**\n * Returns contract read parameters for checking Permit2 allowance.\n * Use with a public client to check if the user has approved Permit2.\n *\n * @param params - The allowance check parameters\n * @returns Contract read parameters for checking allowance\n *\n * @example\n * ```typescript\n * const readParams = getPermit2AllowanceReadParams({\n *   tokenAddress: \"0x...\",\n *   ownerAddress: \"0x...\",\n * });\n *\n * const allowance = await publicClient.readContract(readParams);\n * const needsApproval = allowance < requiredAmount;\n * ```\n */\nexport function getPermit2AllowanceReadParams(params: Permit2AllowanceParams): {\n  address: `0x${string}`;\n  abi: typeof erc20AllowanceAbi;\n  functionName: \"allowance\";\n  args: [`0x${string}`, `0x${string}`];\n} {\n  return {\n    address: getAddress(params.tokenAddress),\n    abi: erc20AllowanceAbi,\n    functionName: \"allowance\",\n    args: [getAddress(params.ownerAddress), PERMIT2_ADDRESS],\n  };\n}\n","import { PaymentRequirements, SchemeNetworkClient, PaymentPayloadResult } from \"@x402/core/types\";\nimport { ClientEvmSigner } from \"../../signer\";\nimport { AssetTransferMethod } from \"../../types\";\nimport { createEIP3009Payload } from \"./eip3009\";\nimport { createPermit2Payload } from \"./permit2\";\n\n/**\n * EVM client implementation for the Exact payment scheme.\n * Supports both EIP-3009 (transferWithAuthorization) and Permit2 flows.\n *\n * Routes to the appropriate authorization method based on\n * `requirements.extra.assetTransferMethod`. Defaults to EIP-3009\n * for backward compatibility with older facilitators.\n */\nexport class ExactEvmScheme implements SchemeNetworkClient {\n  readonly scheme = \"exact\";\n\n  /**\n   * Creates a new ExactEvmClient instance.\n   *\n   * @param signer - The EVM signer for client operations\n   */\n  constructor(private readonly signer: ClientEvmSigner) {}\n\n  /**\n   * Creates a payment payload for the Exact scheme.\n   * Routes to EIP-3009 or Permit2 based on requirements.extra.assetTransferMethod.\n   *\n   * @param x402Version - The x402 protocol version\n   * @param paymentRequirements - The payment requirements\n   * @returns Promise resolving to a payment payload result\n   */\n  async createPaymentPayload(\n    x402Version: number,\n    paymentRequirements: PaymentRequirements,\n  ): Promise<PaymentPayloadResult> {\n    const assetTransferMethod =\n      (paymentRequirements.extra?.assetTransferMethod as AssetTransferMethod) ?? \"eip3009\";\n\n    if (assetTransferMethod === \"permit2\") {\n      return createPermit2Payload(this.signer, x402Version, paymentRequirements);\n    }\n\n    return createEIP3009Payload(this.signer, x402Version, paymentRequirements);\n  }\n}\n","import { x402Client, SelectPaymentRequirements, PaymentPolicy } from \"@x402/core/client\";\nimport { Network } from \"@x402/core/types\";\nimport { ClientEvmSigner } from \"../../signer\";\nimport { ExactEvmScheme } from \"./scheme\";\nimport { ExactEvmSchemeV1 } from \"../v1/client/scheme\";\nimport { NETWORKS } from \"../../v1\";\n\n/**\n * Configuration options for registering EVM schemes to an x402Client\n */\nexport interface EvmClientConfig {\n  /**\n   * The EVM signer to use for creating payment payloads\n   */\n  signer: ClientEvmSigner;\n\n  /**\n   * Optional payment requirements selector function\n   * If not provided, uses the default selector (first available option)\n   */\n  paymentRequirementsSelector?: SelectPaymentRequirements;\n\n  /**\n   * Optional policies to apply to the client\n   */\n  policies?: PaymentPolicy[];\n\n  /**\n   * Optional specific networks to register\n   * If not provided, registers wildcard support (eip155:*)\n   */\n  networks?: Network[];\n}\n\n/**\n * Registers EVM exact payment schemes to an x402Client instance.\n *\n * This function registers:\n * - V2: eip155:* wildcard scheme with ExactEvmScheme (or specific networks if provided)\n * - V1: All supported EVM networks with ExactEvmSchemeV1\n *\n * @param client - The x402Client instance to register schemes to\n * @param config - Configuration for EVM client registration\n * @returns The client instance for chaining\n *\n * @example\n * ```typescript\n * import { registerExactEvmScheme } from \"@x402/evm/exact/client/register\";\n * import { x402Client } from \"@x402/core/client\";\n * import { privateKeyToAccount } from \"viem/accounts\";\n *\n * const account = privateKeyToAccount(\"0x...\");\n * const client = new x402Client();\n * registerExactEvmScheme(client, { signer: account });\n * ```\n */\nexport function registerExactEvmScheme(client: x402Client, config: EvmClientConfig): x402Client {\n  // Register V2 scheme\n  if (config.networks && config.networks.length > 0) {\n    // Register specific networks\n    config.networks.forEach(network => {\n      client.register(network, new ExactEvmScheme(config.signer));\n    });\n  } else {\n    // Register wildcard for all EVM chains\n    client.register(\"eip155:*\", new ExactEvmScheme(config.signer));\n  }\n\n  // Register all V1 networks\n  NETWORKS.forEach(network => {\n    client.registerV1(network as Network, new ExactEvmSchemeV1(config.signer));\n  });\n\n  // Apply policies if provided\n  if (config.policies) {\n    config.policies.forEach(policy => {\n      client.registerPolicy(policy);\n    });\n  }\n\n  return 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dist/cjs/exact/facilitator/index.d.ts

@@ -16,2 +16,3 @@ import { SchemeNetworkFacilitator, PaymentPayload, PaymentRequirements, VerifyResponse, SettleResponse, Network } from '@x402/core/types';
  * EVM facilitator implementation for the Exact payment scheme.
+ * Routes between EIP-3009 and Permit2 based on payload type.
  */
@@ -48,2 +49,3 @@ declare class ExactEvmScheme implements SchemeNetworkFacilitator {
      * Verifies a payment payload.
+     * Routes to the appropriate verification logic based on payload type.
      *
@@ -57,2 +59,3 @@ * @param payload - The payment payload to verify
      * Settles a payment by executing the transfer.
+     * Routes to the appropriate settlement logic based on payload type.
      *
@@ -59,0 +62,0 @@ * @param payload - The payment payload to settle

dist/cjs/exact/facilitator/index.js

@@ -28,3 +28,8 @@ "use strict";
 
-// src/exact/facilitator/scheme.ts
+// src/types.ts
+function isPermit2Payload(payload) {
+  return "permit2Authorization" in payload;
+}
+
+// src/exact/facilitator/eip3009.ts
 var import_viem = require("viem");
@@ -43,2 +48,20 @@
 };
+var permit2WitnessTypes = {
+  PermitWitnessTransferFrom: [
+    { name: "permitted", type: "TokenPermissions" },
+    { name: "spender", type: "address" },
+    { name: "nonce", type: "uint256" },
+    { name: "deadline", type: "uint256" },
+    { name: "witness", type: "Witness" }
+  ],
+  TokenPermissions: [
+    { name: "token", type: "address" },
+    { name: "amount", type: "uint256" }
+  ],
+  Witness: [
+    { name: "to", type: "address" },
+    { name: "validAfter", type: "uint256" },
+    { name: "extra", type: "bytes" }
+  ]
+};
 var eip3009ABI = [
@@ -92,3 +115,599 @@ {
 ];
+var PERMIT2_ADDRESS = "0x000000000022D473030F116dDEE9F6B43aC78BA3";
+var x402ExactPermit2ProxyAddress = "0x4020615294c913F045dc10f0a5cdEbd86c280001";
+var x402ExactPermit2ProxyABI = [
+  {
+    type: "function",
+    name: "PERMIT2",
+    inputs: [],
+    outputs: [{ name: "", type: "address", internalType: "contract ISignatureTransfer" }],
+    stateMutability: "view"
+  },
+  {
+    type: "function",
+    name: "WITNESS_TYPEHASH",
+    inputs: [],
+    outputs: [{ name: "", type: "bytes32", internalType: "bytes32" }],
+    stateMutability: "view"
+  },
+  {
+    type: "function",
+    name: "WITNESS_TYPE_STRING",
+    inputs: [],
+    outputs: [{ name: "", type: "string", internalType: "string" }],
+    stateMutability: "view"
+  },
+  {
+    type: "function",
+    name: "initialize",
+    inputs: [{ name: "_permit2", type: "address", internalType: "address" }],
+    outputs: [],
+    stateMutability: "nonpayable"
+  },
+  {
+    type: "function",
+    name: "settle",
+    inputs: [
+      {
+        name: "permit",
+        type: "tuple",
+        internalType: "struct ISignatureTransfer.PermitTransferFrom",
+        components: [
+          {
+            name: "permitted",
+            type: "tuple",
+            internalType: "struct ISignatureTransfer.TokenPermissions",
+            components: [
+              { name: "token", type: "address", internalType: "address" },
+              { name: "amount", type: "uint256", internalType: "uint256" }
+            ]
+          },
+          { name: "nonce", type: "uint256", internalType: "uint256" },
+          { name: "deadline", type: "uint256", internalType: "uint256" }
+        ]
+      },
+      { name: "owner", type: "address", internalType: "address" },
+      {
+        name: "witness",
+        type: "tuple",
+        internalType: "struct x402BasePermit2Proxy.Witness",
+        components: [
+          { name: "to", type: "address", internalType: "address" },
+          { name: "validAfter", type: "uint256", internalType: "uint256" },
+          { name: "extra", type: "bytes", internalType: "bytes" }
+        ]
+      },
+      { name: "signature", type: "bytes", internalType: "bytes" }
+    ],
+    outputs: [],
+    stateMutability: "nonpayable"
+  },
+  {
+    type: "function",
+    name: "settleWithPermit",
+    inputs: [
+      {
+        name: "permit2612",
+        type: "tuple",
+        internalType: "struct x402BasePermit2Proxy.EIP2612Permit",
+        components: [
+          { name: "value", type: "uint256", internalType: "uint256" },
+          { name: "deadline", type: "uint256", internalType: "uint256" },
+          { name: "r", type: "bytes32", internalType: "bytes32" },
+          { name: "s", type: "bytes32", internalType: "bytes32" },
+          { name: "v", type: "uint8", internalType: "uint8" }
+        ]
+      },
+      {
+        name: "permit",
+        type: "tuple",
+        internalType: "struct ISignatureTransfer.PermitTransferFrom",
+        components: [
+          {
+            name: "permitted",
+            type: "tuple",
+            internalType: "struct ISignatureTransfer.TokenPermissions",
+            components: [
+              { name: "token", type: "address", internalType: "address" },
+              { name: "amount", type: "uint256", internalType: "uint256" }
+            ]
+          },
+          { name: "nonce", type: "uint256", internalType: "uint256" },
+          { name: "deadline", type: "uint256", internalType: "uint256" }
+        ]
+      },
+      { name: "owner", type: "address", internalType: "address" },
+      {
+        name: "witness",
+        type: "tuple",
+        internalType: "struct x402BasePermit2Proxy.Witness",
+        components: [
+          { name: "to", type: "address", internalType: "address" },
+          { name: "validAfter", type: "uint256", internalType: "uint256" },
+          { name: "extra", type: "bytes", internalType: "bytes" }
+        ]
+      },
+      { name: "signature", type: "bytes", internalType: "bytes" }
+    ],
+    outputs: [],
+    stateMutability: "nonpayable"
+  },
+  { type: "event", name: "Settled", inputs: [], anonymous: false },
+  { type: "event", name: "SettledWithPermit", inputs: [], anonymous: false },
+  { type: "error", name: "AlreadyInitialized", inputs: [] },
+  { type: "error", name: "InvalidDestination", inputs: [] },
+  { type: "error", name: "InvalidOwner", inputs: [] },
+  { type: "error", name: "InvalidPermit2Address", inputs: [] },
+  { type: "error", name: "PaymentTooEarly", inputs: [] },
+  { type: "error", name: "ReentrancyGuardReentrantCall", inputs: [] }
+];
 
+// src/exact/facilitator/eip3009.ts
+async function verifyEIP3009(signer, payload, requirements, eip3009Payload) {
+  const payer = eip3009Payload.authorization.from;
+  if (payload.accepted.scheme !== "exact" || requirements.scheme !== "exact") {
+    return {
+      isValid: false,
+      invalidReason: "unsupported_scheme",
+      payer
+    };
+  }
+  if (!requirements.extra?.name || !requirements.extra?.version) {
+    return {
+      isValid: false,
+      invalidReason: "missing_eip712_domain",
+      payer
+    };
+  }
+  const { name, version } = requirements.extra;
+  const erc20Address = (0, import_viem.getAddress)(requirements.asset);
+  if (payload.accepted.network !== requirements.network) {
+    return {
+      isValid: false,
+      invalidReason: "network_mismatch",
+      payer
+    };
+  }
+  const permitTypedData = {
+    types: authorizationTypes,
+    primaryType: "TransferWithAuthorization",
+    domain: {
+      name,
+      version,
+      chainId: parseInt(requirements.network.split(":")[1]),
+      verifyingContract: erc20Address
+    },
+    message: {
+      from: eip3009Payload.authorization.from,
+      to: eip3009Payload.authorization.to,
+      value: BigInt(eip3009Payload.authorization.value),
+      validAfter: BigInt(eip3009Payload.authorization.validAfter),
+      validBefore: BigInt(eip3009Payload.authorization.validBefore),
+      nonce: eip3009Payload.authorization.nonce
+    }
+  };
+  try {
+    const recoveredAddress = await signer.verifyTypedData({
+      address: eip3009Payload.authorization.from,
+      ...permitTypedData,
+      signature: eip3009Payload.signature
+    });
+    if (!recoveredAddress) {
+      return {
+        isValid: false,
+        invalidReason: "invalid_exact_evm_payload_signature",
+        payer
+      };
+    }
+  } catch {
+    const signature = eip3009Payload.signature;
+    const signatureLength = signature.startsWith("0x") ? signature.length - 2 : signature.length;
+    const isSmartWallet = signatureLength > 130;
+    if (isSmartWallet) {
+      const payerAddress = eip3009Payload.authorization.from;
+      const bytecode = await signer.getCode({ address: payerAddress });
+      if (!bytecode || bytecode === "0x") {
+        const erc6492Data = (0, import_viem.parseErc6492Signature)(signature);
+        const hasDeploymentInfo = erc6492Data.address && erc6492Data.data && !(0, import_viem.isAddressEqual)(erc6492Data.address, "0x0000000000000000000000000000000000000000");
+        if (!hasDeploymentInfo) {
+          return {
+            isValid: false,
+            invalidReason: "invalid_exact_evm_payload_undeployed_smart_wallet",
+            payer: payerAddress
+          };
+        }
+      } else {
+        return {
+          isValid: false,
+          invalidReason: "invalid_exact_evm_payload_signature",
+          payer
+        };
+      }
+    } else {
+      return {
+        isValid: false,
+        invalidReason: "invalid_exact_evm_payload_signature",
+        payer
+      };
+    }
+  }
+  if ((0, import_viem.getAddress)(eip3009Payload.authorization.to) !== (0, import_viem.getAddress)(requirements.payTo)) {
+    return {
+      isValid: false,
+      invalidReason: "invalid_exact_evm_payload_recipient_mismatch",
+      payer
+    };
+  }
+  const now = Math.floor(Date.now() / 1e3);
+  if (BigInt(eip3009Payload.authorization.validBefore) < BigInt(now + 6)) {
+    return {
+      isValid: false,
+      invalidReason: "invalid_exact_evm_payload_authorization_valid_before",
+      payer
+    };
+  }
+  if (BigInt(eip3009Payload.authorization.validAfter) > BigInt(now)) {
+    return {
+      isValid: false,
+      invalidReason: "invalid_exact_evm_payload_authorization_valid_after",
+      payer
+    };
+  }
+  try {
+    const balance = await signer.readContract({
+      address: erc20Address,
+      abi: eip3009ABI,
+      functionName: "balanceOf",
+      args: [eip3009Payload.authorization.from]
+    });
+    if (BigInt(balance) < BigInt(requirements.amount)) {
+      return {
+        isValid: false,
+        invalidReason: "insufficient_funds",
+        invalidMessage: `Insufficient funds to complete the payment. Required: ${requirements.amount} ${requirements.asset}, Available: ${balance.toString()} ${requirements.asset}. Please add funds to your wallet and try again.`,
+        payer
+      };
+    }
+  } catch {
+  }
+  if (BigInt(eip3009Payload.authorization.value) < BigInt(requirements.amount)) {
+    return {
+      isValid: false,
+      invalidReason: "invalid_exact_evm_payload_authorization_value",
+      payer
+    };
+  }
+  return {
+    isValid: true,
+    invalidReason: void 0,
+    payer
+  };
+}
+async function settleEIP3009(signer, payload, requirements, eip3009Payload, config) {
+  const payer = eip3009Payload.authorization.from;
+  const valid = await verifyEIP3009(signer, payload, requirements, eip3009Payload);
+  if (!valid.isValid) {
+    return {
+      success: false,
+      network: payload.accepted.network,
+      transaction: "",
+      errorReason: valid.invalidReason ?? "invalid_scheme",
+      payer
+    };
+  }
+  try {
+    const parseResult = (0, import_viem.parseErc6492Signature)(eip3009Payload.signature);
+    const { signature, address: factoryAddress, data: factoryCalldata } = parseResult;
+    if (config.deployERC4337WithEIP6492 && factoryAddress && factoryCalldata && !(0, import_viem.isAddressEqual)(factoryAddress, "0x0000000000000000000000000000000000000000")) {
+      const bytecode = await signer.getCode({ address: payer });
+      if (!bytecode || bytecode === "0x") {
+        const deployTx = await signer.sendTransaction({
+          to: factoryAddress,
+          data: factoryCalldata
+        });
+        await signer.waitForTransactionReceipt({ hash: deployTx });
+      }
+    }
+    const signatureLength = signature.startsWith("0x") ? signature.length - 2 : signature.length;
+    const isECDSA = signatureLength === 130;
+    let tx;
+    if (isECDSA) {
+      const parsedSig = (0, import_viem.parseSignature)(signature);
+      tx = await signer.writeContract({
+        address: (0, import_viem.getAddress)(requirements.asset),
+        abi: eip3009ABI,
+        functionName: "transferWithAuthorization",
+        args: [
+          (0, import_viem.getAddress)(eip3009Payload.authorization.from),
+          (0, import_viem.getAddress)(eip3009Payload.authorization.to),
+          BigInt(eip3009Payload.authorization.value),
+          BigInt(eip3009Payload.authorization.validAfter),
+          BigInt(eip3009Payload.authorization.validBefore),
+          eip3009Payload.authorization.nonce,
+          parsedSig.v || parsedSig.yParity,
+          parsedSig.r,
+          parsedSig.s
+        ]
+      });
+    } else {
+      tx = await signer.writeContract({
+        address: (0, import_viem.getAddress)(requirements.asset),
+        abi: eip3009ABI,
+        functionName: "transferWithAuthorization",
+        args: [
+          (0, import_viem.getAddress)(eip3009Payload.authorization.from),
+          (0, import_viem.getAddress)(eip3009Payload.authorization.to),
+          BigInt(eip3009Payload.authorization.value),
+          BigInt(eip3009Payload.authorization.validAfter),
+          BigInt(eip3009Payload.authorization.validBefore),
+          eip3009Payload.authorization.nonce,
+          signature
+        ]
+      });
+    }
+    const receipt = await signer.waitForTransactionReceipt({ hash: tx });
+    if (receipt.status !== "success") {
+      return {
+        success: false,
+        errorReason: "invalid_transaction_state",
+        transaction: tx,
+        network: payload.accepted.network,
+        payer
+      };
+    }
+    return {
+      success: true,
+      transaction: tx,
+      network: payload.accepted.network,
+      payer
+    };
+  } catch {
+    return {
+      success: false,
+      errorReason: "transaction_failed",
+      transaction: "",
+      network: payload.accepted.network,
+      payer
+    };
+  }
+}
+
+// src/exact/facilitator/permit2.ts
+var import_viem2 = require("viem");
+var erc20AllowanceABI = [
+  {
+    type: "function",
+    name: "allowance",
+    inputs: [
+      { name: "owner", type: "address" },
+      { name: "spender", type: "address" }
+    ],
+    outputs: [{ type: "uint256" }],
+    stateMutability: "view"
+  }
+];
+async function verifyPermit2(signer, payload, requirements, permit2Payload) {
+  const payer = permit2Payload.permit2Authorization.from;
+  if (payload.accepted.scheme !== "exact" || requirements.scheme !== "exact") {
+    return {
+      isValid: false,
+      invalidReason: "unsupported_scheme",
+      payer
+    };
+  }
+  if (payload.accepted.network !== requirements.network) {
+    return {
+      isValid: false,
+      invalidReason: "network_mismatch",
+      payer
+    };
+  }
+  const chainId = parseInt(requirements.network.split(":")[1]);
+  const tokenAddress = (0, import_viem2.getAddress)(requirements.asset);
+  if ((0, import_viem2.getAddress)(permit2Payload.permit2Authorization.spender) !== (0, import_viem2.getAddress)(x402ExactPermit2ProxyAddress)) {
+    return {
+      isValid: false,
+      invalidReason: "invalid_permit2_spender",
+      payer
+    };
+  }
+  if ((0, import_viem2.getAddress)(permit2Payload.permit2Authorization.witness.to) !== (0, import_viem2.getAddress)(requirements.payTo)) {
+    return {
+      isValid: false,
+      invalidReason: "invalid_permit2_recipient_mismatch",
+      payer
+    };
+  }
+  const now = Math.floor(Date.now() / 1e3);
+  if (BigInt(permit2Payload.permit2Authorization.deadline) < BigInt(now + 6)) {
+    return {
+      isValid: false,
+      invalidReason: "permit2_deadline_expired",
+      payer
+    };
+  }
+  if (BigInt(permit2Payload.permit2Authorization.witness.validAfter) > BigInt(now)) {
+    return {
+      isValid: false,
+      invalidReason: "permit2_not_yet_valid",
+      payer
+    };
+  }
+  if (BigInt(permit2Payload.permit2Authorization.permitted.amount) < BigInt(requirements.amount)) {
+    return {
+      isValid: false,
+      invalidReason: "permit2_insufficient_amount",
+      payer
+    };
+  }
+  if ((0, import_viem2.getAddress)(permit2Payload.permit2Authorization.permitted.token) !== tokenAddress) {
+    return {
+      isValid: false,
+      invalidReason: "permit2_token_mismatch",
+      payer
+    };
+  }
+  const permit2TypedData = {
+    types: permit2WitnessTypes,
+    primaryType: "PermitWitnessTransferFrom",
+    domain: {
+      name: "Permit2",
+      chainId,
+      verifyingContract: PERMIT2_ADDRESS
+    },
+    message: {
+      permitted: {
+        token: (0, import_viem2.getAddress)(permit2Payload.permit2Authorization.permitted.token),
+        amount: BigInt(permit2Payload.permit2Authorization.permitted.amount)
+      },
+      spender: (0, import_viem2.getAddress)(permit2Payload.permit2Authorization.spender),
+      nonce: BigInt(permit2Payload.permit2Authorization.nonce),
+      deadline: BigInt(permit2Payload.permit2Authorization.deadline),
+      witness: {
+        to: (0, import_viem2.getAddress)(permit2Payload.permit2Authorization.witness.to),
+        validAfter: BigInt(permit2Payload.permit2Authorization.witness.validAfter),
+        extra: permit2Payload.permit2Authorization.witness.extra
+      }
+    }
+  };
+  try {
+    const isValid = await signer.verifyTypedData({
+      address: payer,
+      ...permit2TypedData,
+      signature: permit2Payload.signature
+    });
+    if (!isValid) {
+      return {
+        isValid: false,
+        invalidReason: "invalid_permit2_signature",
+        payer
+      };
+    }
+  } catch {
+    return {
+      isValid: false,
+      invalidReason: "invalid_permit2_signature",
+      payer
+    };
+  }
+  try {
+    const allowance = await signer.readContract({
+      address: tokenAddress,
+      abi: erc20AllowanceABI,
+      functionName: "allowance",
+      args: [payer, PERMIT2_ADDRESS]
+    });
+    if (allowance < BigInt(requirements.amount)) {
+      return {
+        isValid: false,
+        invalidReason: "permit2_allowance_required",
+        payer
+      };
+    }
+  } catch {
+  }
+  try {
+    const balance = await signer.readContract({
+      address: tokenAddress,
+      abi: eip3009ABI,
+      functionName: "balanceOf",
+      args: [payer]
+    });
+    if (balance < BigInt(requirements.amount)) {
+      return {
+        isValid: false,
+        invalidReason: "insufficient_funds",
+        invalidMessage: `Insufficient funds to complete the payment. Required: ${requirements.amount} ${requirements.asset}, Available: ${balance.toString()} ${requirements.asset}. Please add funds to your wallet and try again.`,
+        payer
+      };
+    }
+  } catch {
+  }
+  return {
+    isValid: true,
+    invalidReason: void 0,
+    payer
+  };
+}
+async function settlePermit2(signer, payload, requirements, permit2Payload) {
+  const payer = permit2Payload.permit2Authorization.from;
+  const valid = await verifyPermit2(signer, payload, requirements, permit2Payload);
+  if (!valid.isValid) {
+    return {
+      success: false,
+      network: payload.accepted.network,
+      transaction: "",
+      errorReason: valid.invalidReason ?? "invalid_scheme",
+      payer
+    };
+  }
+  try {
+    const tx = await signer.writeContract({
+      address: x402ExactPermit2ProxyAddress,
+      abi: x402ExactPermit2ProxyABI,
+      functionName: "settle",
+      args: [
+        {
+          permitted: {
+            token: (0, import_viem2.getAddress)(permit2Payload.permit2Authorization.permitted.token),
+            amount: BigInt(permit2Payload.permit2Authorization.permitted.amount)
+          },
+          nonce: BigInt(permit2Payload.permit2Authorization.nonce),
+          deadline: BigInt(permit2Payload.permit2Authorization.deadline)
+        },
+        (0, import_viem2.getAddress)(payer),
+        {
+          to: (0, import_viem2.getAddress)(permit2Payload.permit2Authorization.witness.to),
+          validAfter: BigInt(permit2Payload.permit2Authorization.witness.validAfter),
+          extra: permit2Payload.permit2Authorization.witness.extra
+        },
+        permit2Payload.signature
+      ]
+    });
+    const receipt = await signer.waitForTransactionReceipt({ hash: tx });
+    if (receipt.status !== "success") {
+      return {
+        success: false,
+        errorReason: "invalid_transaction_state",
+        transaction: tx,
+        network: payload.accepted.network,
+        payer
+      };
+    }
+    return {
+      success: true,
+      transaction: tx,
+      network: payload.accepted.network,
+      payer
+    };
+  } catch (error) {
+    let errorReason = "transaction_failed";
+    if (error instanceof Error) {
+      const message = error.message;
+      if (message.includes("AmountExceedsPermitted")) {
+        errorReason = "permit2_amount_exceeds_permitted";
+      } else if (message.includes("InvalidDestination")) {
+        errorReason = "permit2_invalid_destination";
+      } else if (message.includes("InvalidOwner")) {
+        errorReason = "permit2_invalid_owner";
+      } else if (message.includes("PaymentTooEarly")) {
+        errorReason = "permit2_payment_too_early";
+      } else if (message.includes("InvalidSignature") || message.includes("SignatureExpired")) {
+        errorReason = "permit2_invalid_signature";
+      } else if (message.includes("InvalidNonce")) {
+        errorReason = "permit2_invalid_nonce";
+      } else {
+        errorReason = `transaction_failed: ${message.slice(0, 500)}`;
+      }
+    }
+    return {
+      success: false,
+      errorReason,
+      transaction: "",
+      network: payload.accepted.network,
+      payer
+    };
+  }
+}
+
 // src/exact/facilitator/scheme.ts
@@ -132,2 +751,3 @@ var ExactEvmScheme = class {
    * Verifies a payment payload.
+   * Routes to the appropriate verification logic based on payload type.
    *
@@ -139,142 +759,12 @@ * @param payload - The payment payload to verify
   async verify(payload, requirements) {
-    const exactEvmPayload = payload.payload;
-    if (payload.accepted.scheme !== "exact" || requirements.scheme !== "exact") {
-      return {
-        isValid: false,
-        invalidReason: "unsupported_scheme",
-        payer: exactEvmPayload.authorization.from
-      };
+    const rawPayload = payload.payload;
+    if (isPermit2Payload(rawPayload)) {
+      return verifyPermit2(this.signer, payload, requirements, rawPayload);
     }
-    if (!requirements.extra?.name || !requirements.extra?.version) {
-      return {
-        isValid: false,
-        invalidReason: "missing_eip712_domain",
-        payer: exactEvmPayload.authorization.from
-      };
-    }
-    const { name, version } = requirements.extra;
-    const erc20Address = (0, import_viem.getAddress)(requirements.asset);
-    if (payload.accepted.network !== requirements.network) {
-      return {
-        isValid: false,
-        invalidReason: "network_mismatch",
-        payer: exactEvmPayload.authorization.from
-      };
-    }
-    const permitTypedData = {
-      types: authorizationTypes,
-      primaryType: "TransferWithAuthorization",
-      domain: {
-        name,
-        version,
-        chainId: parseInt(requirements.network.split(":")[1]),
-        verifyingContract: erc20Address
-      },
-      message: {
-        from: exactEvmPayload.authorization.from,
-        to: exactEvmPayload.authorization.to,
-        value: BigInt(exactEvmPayload.authorization.value),
-        validAfter: BigInt(exactEvmPayload.authorization.validAfter),
-        validBefore: BigInt(exactEvmPayload.authorization.validBefore),
-        nonce: exactEvmPayload.authorization.nonce
-      }
-    };
-    try {
-      const recoveredAddress = await this.signer.verifyTypedData({
-        address: exactEvmPayload.authorization.from,
-        ...permitTypedData,
-        signature: exactEvmPayload.signature
-      });
-      if (!recoveredAddress) {
-        return {
-          isValid: false,
-          invalidReason: "invalid_exact_evm_payload_signature",
-          payer: exactEvmPayload.authorization.from
-        };
-      }
-    } catch {
-      const signature = exactEvmPayload.signature;
-      const signatureLength = signature.startsWith("0x") ? signature.length - 2 : signature.length;
-      const isSmartWallet = signatureLength > 130;
-      if (isSmartWallet) {
-        const payerAddress = exactEvmPayload.authorization.from;
-        const bytecode = await this.signer.getCode({ address: payerAddress });
-        if (!bytecode || bytecode === "0x") {
-          const erc6492Data = (0, import_viem.parseErc6492Signature)(signature);
-          const hasDeploymentInfo = erc6492Data.address && erc6492Data.data && !(0, import_viem.isAddressEqual)(erc6492Data.address, "0x0000000000000000000000000000000000000000");
-          if (!hasDeploymentInfo) {
-            return {
-              isValid: false,
-              invalidReason: "invalid_exact_evm_payload_undeployed_smart_wallet",
-              payer: payerAddress
-            };
-          }
-        } else {
-          return {
-            isValid: false,
-            invalidReason: "invalid_exact_evm_payload_signature",
-            payer: exactEvmPayload.authorization.from
-          };
-        }
-      } else {
-        return {
-          isValid: false,
-          invalidReason: "invalid_exact_evm_payload_signature",
-          payer: exactEvmPayload.authorization.from
-        };
-      }
-    }
-    if ((0, import_viem.getAddress)(exactEvmPayload.authorization.to) !== (0, import_viem.getAddress)(requirements.payTo)) {
-      return {
-        isValid: false,
-        invalidReason: "invalid_exact_evm_payload_recipient_mismatch",
-        payer: exactEvmPayload.authorization.from
-      };
-    }
-    const now = Math.floor(Date.now() / 1e3);
-    if (BigInt(exactEvmPayload.authorization.validBefore) < BigInt(now + 6)) {
-      return {
-        isValid: false,
-        invalidReason: "invalid_exact_evm_payload_authorization_valid_before",
-        payer: exactEvmPayload.authorization.from
-      };
-    }
-    if (BigInt(exactEvmPayload.authorization.validAfter) > BigInt(now)) {
-      return {
-        isValid: false,
-        invalidReason: "invalid_exact_evm_payload_authorization_valid_after",
-        payer: exactEvmPayload.authorization.from
-      };
-    }
-    try {
-      const balance = await this.signer.readContract({
-        address: erc20Address,
-        abi: eip3009ABI,
-        functionName: "balanceOf",
-        args: [exactEvmPayload.authorization.from]
-      });
-      if (BigInt(balance) < BigInt(requirements.amount)) {
-        return {
-          isValid: false,
-          invalidReason: "insufficient_funds",
-          payer: exactEvmPayload.authorization.from
-        };
-      }
-    } catch {
-    }
-    if (BigInt(exactEvmPayload.authorization.value) < BigInt(requirements.amount)) {
-      return {
-        isValid: false,
-        invalidReason: "invalid_exact_evm_payload_authorization_value",
-        payer: exactEvmPayload.authorization.from
-      };
-    }
-    return {
-      isValid: true,
-      invalidReason: void 0,
-      payer: exactEvmPayload.authorization.from
-    };
+    const eip3009Payload = rawPayload;
+    return verifyEIP3009(this.signer, payload, requirements, eip3009Payload);
   }
   /**
    * Settles a payment by executing the transfer.
+   * Routes to the appropriate settlement logic based on payload type.
    *
@@ -286,99 +776,8 @@ * @param payload - The payment payload to settle
   async settle(payload, requirements) {
-    const exactEvmPayload = payload.payload;
-    const valid = await this.verify(payload, requirements);
-    if (!valid.isValid) {
-      return {
-        success: false,
-        network: payload.accepted.network,
-        transaction: "",
-        errorReason: valid.invalidReason ?? "invalid_scheme",
-        payer: exactEvmPayload.authorization.from
-      };
+    const rawPayload = payload.payload;
+    if (isPermit2Payload(rawPayload)) {
+      return settlePermit2(this.signer, payload, requirements, rawPayload);
     }
-    try {
-      const parseResult = (0, import_viem.parseErc6492Signature)(exactEvmPayload.signature);
-      const { signature, address: factoryAddress, data: factoryCalldata } = parseResult;
-      if (this.config.deployERC4337WithEIP6492 && factoryAddress && factoryCalldata && !(0, import_viem.isAddressEqual)(factoryAddress, "0x0000000000000000000000000000000000000000")) {
-        const payerAddress = exactEvmPayload.authorization.from;
-        const bytecode = await this.signer.getCode({ address: payerAddress });
-        if (!bytecode || bytecode === "0x") {
-          try {
-            console.log(`Deploying ERC-4337 smart wallet for ${payerAddress} via EIP-6492`);
-            const deployTx = await this.signer.sendTransaction({
-              to: factoryAddress,
-              data: factoryCalldata
-            });
-            await this.signer.waitForTransactionReceipt({ hash: deployTx });
-            console.log(`Successfully deployed smart wallet for ${payerAddress}`);
-          } catch (deployError) {
-            console.error("Smart wallet deployment failed:", deployError);
-            throw deployError;
-          }
-        } else {
-          console.log(`Smart wallet for ${payerAddress} already deployed, skipping deployment`);
-        }
-      }
-      const signatureLength = signature.startsWith("0x") ? signature.length - 2 : signature.length;
-      const isECDSA = signatureLength === 130;
-      let tx;
-      if (isECDSA) {
-        const parsedSig = (0, import_viem.parseSignature)(signature);
-        tx = await this.signer.writeContract({
-          address: (0, import_viem.getAddress)(requirements.asset),
-          abi: eip3009ABI,
-          functionName: "transferWithAuthorization",
-          args: [
-            (0, import_viem.getAddress)(exactEvmPayload.authorization.from),
-            (0, import_viem.getAddress)(exactEvmPayload.authorization.to),
-            BigInt(exactEvmPayload.authorization.value),
-            BigInt(exactEvmPayload.authorization.validAfter),
-            BigInt(exactEvmPayload.authorization.validBefore),
-            exactEvmPayload.authorization.nonce,
-            parsedSig.v || parsedSig.yParity,
-            parsedSig.r,
-            parsedSig.s
-          ]
-        });
-      } else {
-        tx = await this.signer.writeContract({
-          address: (0, import_viem.getAddress)(requirements.asset),
-          abi: eip3009ABI,
-          functionName: "transferWithAuthorization",
-          args: [
-            (0, import_viem.getAddress)(exactEvmPayload.authorization.from),
-            (0, import_viem.getAddress)(exactEvmPayload.authorization.to),
-            BigInt(exactEvmPayload.authorization.value),
-            BigInt(exactEvmPayload.authorization.validAfter),
-            BigInt(exactEvmPayload.authorization.validBefore),
-            exactEvmPayload.authorization.nonce,
-            signature
-          ]
-        });
-      }
-      const receipt = await this.signer.waitForTransactionReceipt({ hash: tx });
-      if (receipt.status !== "success") {
-        return {
-          success: false,
-          errorReason: "invalid_transaction_state",
-          transaction: tx,
-          network: payload.accepted.network,
-          payer: exactEvmPayload.authorization.from
-        };
-      }
-      return {
-        success: true,
-        transaction: tx,
-        network: payload.accepted.network,
-        payer: exactEvmPayload.authorization.from
-      };
-    } catch (error) {
-      console.error("Failed to settle transaction:", error);
-      return {
-        success: false,
-        errorReason: "transaction_failed",
-        transaction: "",
-        network: payload.accepted.network,
-        payer: exactEvmPayload.authorization.from
-      };
-    }
+    const eip3009Payload = rawPayload;
+    return settleEIP3009(this.signer, payload, requirements, eip3009Payload, this.config);
   }
@@ -388,20 +787,43 @@ };
 // src/exact/v1/facilitator/scheme.ts
+var import_viem5 = require("viem");
+
+// src/utils.ts
+var import_viem4 = require("viem");
+
+// src/exact/v1/client/scheme.ts
 var import_viem3 = require("viem");
 
+// src/v1/index.ts
+var EVM_NETWORK_CHAIN_ID_MAP = {
+  ethereum: 1,
+  sepolia: 11155111,
+  abstract: 2741,
+  "abstract-testnet": 11124,
+  "base-sepolia": 84532,
+  base: 8453,
+  "avalanche-fuji": 43113,
+  avalanche: 43114,
+  iotex: 4689,
+  sei: 1329,
+  "sei-testnet": 1328,
+  polygon: 137,
+  "polygon-amoy": 80002,
+  peaq: 3338,
+  story: 1514,
+  educhain: 41923,
+  "skale-base-sepolia": 324705682
+};
+var NETWORKS = Object.keys(EVM_NETWORK_CHAIN_ID_MAP);
+
 // src/utils.ts
-var import_viem2 = require("viem");
 function getEvmChainId(network) {
-  const networkMap = {
-    base: 8453,
-    "base-sepolia": 84532,
-    ethereum: 1,
-    sepolia: 11155111,
-    polygon: 137,
-    "polygon-amoy": 80002
-  };
-  return networkMap[network] || 1;
+  const chainId = EVM_NETWORK_CHAIN_ID_MAP[network];
+  if (!chainId) {
+    throw new Error(`Unsupported network: ${network}`);
+  }
+  return chainId;
 }
 
 // src/exact/v1/facilitator/scheme.ts
-var ExactEvmSchemeV1 = class {
+var ExactEvmSchemeV12 = class {
   /**
@@ -459,3 +881,12 @@ * Creates a new ExactEvmFacilitatorV1 instance.
     }
-    const chainId = getEvmChainId(payloadV1.network);
+    let chainId;
+    try {
+      chainId = getEvmChainId(payloadV1.network);
+    } catch {
+      return {
+        isValid: false,
+        invalidReason: `invalid_network`,
+        payer: exactEvmPayload.authorization.from
+      };
+    }
     if (!requirements.extra?.name || !requirements.extra?.version) {
@@ -469,3 +900,3 @@ return {
     const { name, version } = requirements.extra;
-    const erc20Address = (0, import_viem3.getAddress)(requirements.asset);
+    const erc20Address = (0, import_viem5.getAddress)(requirements.asset);
     if (payloadV1.network !== requirements.network) {
@@ -517,4 +948,4 @@ return {
         if (!bytecode || bytecode === "0x") {
-          const erc6492Data = (0, import_viem3.parseErc6492Signature)(signature);
-          const hasDeploymentInfo = erc6492Data.address && erc6492Data.data && !(0, import_viem3.isAddressEqual)(erc6492Data.address, "0x0000000000000000000000000000000000000000");
+          const erc6492Data = (0, import_viem5.parseErc6492Signature)(signature);
+          const hasDeploymentInfo = erc6492Data.address && erc6492Data.data && !(0, import_viem5.isAddressEqual)(erc6492Data.address, "0x0000000000000000000000000000000000000000");
           if (!hasDeploymentInfo) {
@@ -542,3 +973,3 @@ return {
     }
-    if ((0, import_viem3.getAddress)(exactEvmPayload.authorization.to) !== (0, import_viem3.getAddress)(requirements.payTo)) {
+    if ((0, import_viem5.getAddress)(exactEvmPayload.authorization.to) !== (0, import_viem5.getAddress)(requirements.payTo)) {
       return {
@@ -576,2 +1007,3 @@ isValid: false,
           invalidReason: "insufficient_funds",
+          invalidMessage: `Insufficient funds to complete the payment. Required: ${requirementsV1.maxAmountRequired} ${requirements.asset}, Available: ${balance.toString()} ${requirements.asset}. Please add funds to your wallet and try again.`,
           payer: exactEvmPayload.authorization.from
@@ -616,5 +1048,5 @@ };
     try {
-      const parseResult = (0, import_viem3.parseErc6492Signature)(exactEvmPayload.signature);
+      const parseResult = (0, import_viem5.parseErc6492Signature)(exactEvmPayload.signature);
       const { signature, address: factoryAddress, data: factoryCalldata } = parseResult;
-      if (this.config.deployERC4337WithEIP6492 && factoryAddress && factoryCalldata && !(0, import_viem3.isAddressEqual)(factoryAddress, "0x0000000000000000000000000000000000000000")) {
+      if (this.config.deployERC4337WithEIP6492 && factoryAddress && factoryCalldata && !(0, import_viem5.isAddressEqual)(factoryAddress, "0x0000000000000000000000000000000000000000")) {
         const payerAddress = exactEvmPayload.authorization.from;
@@ -643,10 +1075,10 @@ const bytecode = await this.signer.getCode({ address: payerAddress });
       if (isECDSA) {
-        const parsedSig = (0, import_viem3.parseSignature)(signature);
+        const parsedSig = (0, import_viem5.parseSignature)(signature);
         tx = await this.signer.writeContract({
-          address: (0, import_viem3.getAddress)(requirements.asset),
+          address: (0, import_viem5.getAddress)(requirements.asset),
           abi: eip3009ABI,
           functionName: "transferWithAuthorization",
           args: [
-            (0, import_viem3.getAddress)(exactEvmPayload.authorization.from),
-            (0, import_viem3.getAddress)(exactEvmPayload.authorization.to),
+            (0, import_viem5.getAddress)(exactEvmPayload.authorization.from),
+            (0, import_viem5.getAddress)(exactEvmPayload.authorization.to),
             BigInt(exactEvmPayload.authorization.value),
@@ -663,8 +1095,8 @@ BigInt(exactEvmPayload.authorization.validAfter),
         tx = await this.signer.writeContract({
-          address: (0, import_viem3.getAddress)(requirements.asset),
+          address: (0, import_viem5.getAddress)(requirements.asset),
           abi: eip3009ABI,
           functionName: "transferWithAuthorization",
           args: [
-            (0, import_viem3.getAddress)(exactEvmPayload.authorization.from),
-            (0, import_viem3.getAddress)(exactEvmPayload.authorization.to),
+            (0, import_viem5.getAddress)(exactEvmPayload.authorization.from),
+            (0, import_viem5.getAddress)(exactEvmPayload.authorization.to),
             BigInt(exactEvmPayload.authorization.value),
@@ -707,24 +1139,2 @@ BigInt(exactEvmPayload.authorization.validAfter),
 
-// src/exact/v1/client/scheme.ts
-var import_viem4 = require("viem");
-
-// src/v1/index.ts
-var NETWORKS = [
-  "abstract",
-  "abstract-testnet",
-  "base-sepolia",
-  "base",
-  "avalanche-fuji",
-  "avalanche",
-  "iotex",
-  "sei",
-  "sei-testnet",
-  "polygon",
-  "polygon-amoy",
-  "peaq",
-  "story",
-  "educhain",
-  "skale-base-sepolia"
-];
-
 // src/exact/facilitator/register.ts
@@ -740,3 +1150,3 @@ function registerExactEvmScheme(facilitator, config) {
     NETWORKS,
-    new ExactEvmSchemeV1(config.signer, {
+    new ExactEvmSchemeV12(config.signer, {
       deployERC4337WithEIP6492: config.deployERC4337WithEIP6492
@@ -743,0 +1153,0 @@ })

dist/cjs/exact/v1/client/index.js

@@ -28,3 +28,3 @@ "use strict";
 // src/exact/v1/client/scheme.ts
-var import_viem2 = require("viem");
+var import_viem3 = require("viem");
 
@@ -44,21 +44,47 @@ // src/constants.ts
 // src/utils.ts
+var import_viem2 = require("viem");
+
+// src/exact/v1/facilitator/scheme.ts
 var import_viem = require("viem");
+
+// src/v1/index.ts
+var EVM_NETWORK_CHAIN_ID_MAP = {
+  ethereum: 1,
+  sepolia: 11155111,
+  abstract: 2741,
+  "abstract-testnet": 11124,
+  "base-sepolia": 84532,
+  base: 8453,
+  "avalanche-fuji": 43113,
+  avalanche: 43114,
+  iotex: 4689,
+  sei: 1329,
+  "sei-testnet": 1328,
+  polygon: 137,
+  "polygon-amoy": 80002,
+  peaq: 3338,
+  story: 1514,
+  educhain: 41923,
+  "skale-base-sepolia": 324705682
+};
+var NETWORKS = Object.keys(EVM_NETWORK_CHAIN_ID_MAP);
+
+// src/utils.ts
 function getEvmChainId(network) {
-  const networkMap = {
-    base: 8453,
-    "base-sepolia": 84532,
-    ethereum: 1,
-    sepolia: 11155111,
-    polygon: 137,
-    "polygon-amoy": 80002
-  };
-  return networkMap[network] || 1;
+  const chainId = EVM_NETWORK_CHAIN_ID_MAP[network];
+  if (!chainId) {
+    throw new Error(`Unsupported network: ${network}`);
+  }
+  return chainId;
 }
-function createNonce() {
-  const cryptoObj = typeof globalThis.crypto !== "undefined" ? globalThis.crypto : globalThis.crypto;
+function getCrypto() {
+  const cryptoObj = globalThis.crypto;
   if (!cryptoObj) {
     throw new Error("Crypto API not available");
   }
-  return (0, import_viem.toHex)(cryptoObj.getRandomValues(new Uint8Array(32)));
+  return cryptoObj;
 }
+function createNonce() {
+  return (0, import_viem2.toHex)(getCrypto().getRandomValues(new Uint8Array(32)));
+}
 
@@ -89,3 +115,3 @@ // src/exact/v1/client/scheme.ts
       from: this.signer.address,
-      to: (0, import_viem2.getAddress)(selectedV1.payTo),
+      to: (0, import_viem3.getAddress)(selectedV1.payTo),
       value: selectedV1.maxAmountRequired,
@@ -128,7 +154,7 @@ validAfter: (now - 600).toString(),
       chainId,
-      verifyingContract: (0, import_viem2.getAddress)(requirements.asset)
+      verifyingContract: (0, import_viem3.getAddress)(requirements.asset)
     };
     const message = {
-      from: (0, import_viem2.getAddress)(authorization.from),
-      to: (0, import_viem2.getAddress)(authorization.to),
+      from: (0, import_viem3.getAddress)(authorization.from),
+      to: (0, import_viem3.getAddress)(authorization.to),
       value: BigInt(authorization.value),
@@ -135,0 +161,0 @@ validAfter: BigInt(authorization.validAfter),

dist/cjs/exact/v1/client/index.js.map

@@ -1,1 +0,1 @@
-{"version":3,"sources":["../../../../../src/exact/v1/client/index.ts","../../../../../src/exact/v1/client/scheme.ts","../../../../../src/constants.ts","../../../../../src/utils.ts"],"sourcesContent":["export { ExactEvmSchemeV1 } from \"./scheme\";\n","import {\n  Network,\n  PaymentPayload,\n  PaymentRequirements,\n  SchemeNetworkClient,\n} from \"@x402/core/types\";\nimport { PaymentRequirementsV1 } from \"@x402/core/types/v1\";\nimport { getAddress } from \"viem\";\nimport { authorizationTypes } from \"../../../constants\";\nimport { ClientEvmSigner } from \"../../../signer\";\nimport { ExactEvmPayloadV1 } from \"../../../types\";\nimport { createNonce, getEvmChainId } from \"../../../utils\";\n\n/**\n * EVM client implementation for the Exact payment scheme (V1).\n */\nexport class ExactEvmSchemeV1 implements SchemeNetworkClient {\n  readonly scheme = \"exact\";\n\n  /**\n   * Creates a new ExactEvmClientV1 instance.\n   *\n   * @param signer - The EVM signer for client operations\n   */\n  constructor(private readonly signer: ClientEvmSigner) {}\n\n  /**\n   * Creates a payment payload for the Exact scheme (V1).\n   *\n   * @param x402Version - The x402 protocol version\n   * @param paymentRequirements - The payment requirements\n   * @returns Promise resolving to a payment payload\n   */\n  async createPaymentPayload(\n    x402Version: number,\n    paymentRequirements: PaymentRequirements,\n  ): Promise<\n    Pick<PaymentPayload, \"x402Version\" | \"payload\"> & { scheme: string; network: Network }\n  > {\n    const selectedV1 = paymentRequirements as unknown as PaymentRequirementsV1;\n    const nonce = createNonce();\n    const now = Math.floor(Date.now() / 1000);\n\n    const authorization: ExactEvmPayloadV1[\"authorization\"] = {\n      from: this.signer.address,\n      to: getAddress(selectedV1.payTo),\n      value: selectedV1.maxAmountRequired,\n      validAfter: (now - 600).toString(), // 10 minutes before\n      validBefore: (now + selectedV1.maxTimeoutSeconds).toString(),\n      nonce,\n    };\n\n    // Sign the authorization\n    const signature = await this.signAuthorization(authorization, selectedV1);\n\n    const payload: ExactEvmPayloadV1 = {\n      authorization,\n      signature,\n    };\n\n    return {\n      x402Version,\n      scheme: selectedV1.scheme,\n      network: selectedV1.network,\n      payload,\n    };\n  }\n\n  /**\n   * Sign the EIP-3009 authorization using EIP-712\n   *\n   * @param authorization - 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+{"version":3,"sources":["../../../../../src/exact/v1/client/index.ts","../../../../../src/exact/v1/client/scheme.ts","../../../../../src/constants.ts","../../../../../src/utils.ts","../../../../../src/exact/v1/facilitator/scheme.ts","../../../../../src/v1/index.ts"],"sourcesContent":["export { ExactEvmSchemeV1 } from \"./scheme\";\n","import {\n  Network,\n  PaymentPayload,\n  PaymentRequirements,\n  SchemeNetworkClient,\n} from \"@x402/core/types\";\nimport { PaymentRequirementsV1 } from \"@x402/core/types/v1\";\nimport { getAddress } from \"viem\";\nimport { authorizationTypes } from \"../../../constants\";\nimport { ClientEvmSigner } from \"../../../signer\";\nimport { ExactEvmPayloadV1 } from \"../../../types\";\nimport { createNonce, getEvmChainId } from \"../../../utils\";\nimport { EvmNetworkV1 } from \"../../../v1\";\n\n/**\n * EVM client implementation for the Exact payment scheme (V1).\n */\nexport class ExactEvmSchemeV1 implements SchemeNetworkClient {\n  readonly scheme = \"exact\";\n\n  /**\n   * Creates a new ExactEvmClientV1 instance.\n   *\n   * @param signer - The EVM signer for client operations\n   */\n  constructor(private readonly signer: ClientEvmSigner) {}\n\n  /**\n   * Creates a payment payload for the Exact scheme (V1).\n   *\n   * @param x402Version - The x402 protocol version\n   * @param paymentRequirements - The payment requirements\n   * @returns Promise resolving to a payment payload\n   */\n  async createPaymentPayload(\n    x402Version: number,\n    paymentRequirements: PaymentRequirements,\n  ): Promise<\n    Pick<PaymentPayload, \"x402Version\" | \"payload\"> & { scheme: string; network: Network }\n  > {\n    const selectedV1 = paymentRequirements as unknown as PaymentRequirementsV1;\n    const nonce = createNonce();\n    const now = Math.floor(Date.now() / 1000);\n\n    const authorization: ExactEvmPayloadV1[\"authorization\"] = {\n      from: this.signer.address,\n      to: getAddress(selectedV1.payTo),\n      value: selectedV1.maxAmountRequired,\n      validAfter: (now - 600).toString(), // 10 minutes before\n      validBefore: (now + selectedV1.maxTimeoutSeconds).toString(),\n      nonce,\n    };\n\n    // Sign the authorization\n    const signature = await this.signAuthorization(authorization, selectedV1);\n\n    const payload: ExactEvmPayloadV1 = {\n      authorization,\n      signature,\n    };\n\n    return {\n      x402Version,\n      scheme: selectedV1.scheme,\n      network: selectedV1.network,\n      payload,\n    };\n  }\n\n  /**\n   * Sign the EIP-3009 authorization using EIP-712\n   *\n   * @param authorization - The authorization to sign\n   * @param requirements - The payment requirements\n   * @returns Promise resolving to the signature\n   */\n  private async signAuthorization(\n    authorization: ExactEvmPayloadV1[\"authorization\"],\n    requirements: PaymentRequirementsV1,\n  ): Promise<`0x${string}`> {\n    const chainId = getEvmChainId(requirements.network as EvmNetworkV1);\n\n    if (!requirements.extra?.name || !requirements.extra?.version) {\n      throw new Error(\n        `EIP-712 domain parameters (name, version) are required in payment requirements for asset ${requirements.asset}`,\n      );\n    }\n\n    const { name, version } = requirements.extra;\n\n    const domain = {\n      name,\n      version,\n      chainId,\n      verifyingContract: getAddress(requirements.asset),\n    };\n\n    const message = {\n      from: getAddress(authorization.from),\n      to: getAddress(authorization.to),\n      value: BigInt(authorization.value),\n      validAfter: BigInt(authorization.validAfter),\n      validBefore: BigInt(authorization.validBefore),\n      nonce: authorization.nonce,\n    };\n\n    return await this.signer.signTypedData({\n      domain,\n      types: authorizationTypes,\n      primaryType: \"TransferWithAuthorization\",\n      message,\n    });\n  }\n}\n","// EIP-3009 TransferWithAuthorization types for EIP-712 signing\nexport const authorizationTypes = {\n  TransferWithAuthorization: [\n    { name: \"from\", type: \"address\" },\n    { name: \"to\", type: \"address\" },\n    { name: \"value\", type: \"uint256\" },\n    { name: \"validAfter\", type: \"uint256\" },\n    { name: \"validBefore\", type: \"uint256\" },\n    { name: \"nonce\", type: \"bytes32\" },\n  ],\n} as const;\n\n/**\n * Permit2 EIP-712 types for signing PermitWitnessTransferFrom.\n * Must match the exact format expected by the Permit2 contract.\n * Note: Types must be in ALPHABETICAL order after the primary type (TokenPermissions < Witness).\n */\nexport const permit2WitnessTypes = {\n  PermitWitnessTransferFrom: [\n    { name: \"permitted\", type: \"TokenPermissions\" },\n    { name: \"spender\", type: \"address\" },\n    { name: \"nonce\", type: \"uint256\" },\n    { name: \"deadline\", type: \"uint256\" },\n    { name: \"witness\", type: \"Witness\" },\n  ],\n  TokenPermissions: [\n    { name: \"token\", type: \"address\" },\n    { name: \"amount\", type: \"uint256\" },\n  ],\n  Witness: [\n    { name: \"to\", type: \"address\" },\n    { name: \"validAfter\", type: \"uint256\" },\n    { name: \"extra\", type: \"bytes\" },\n  ],\n} as const;\n\n// EIP3009 ABI for transferWithAuthorization function\nexport const eip3009ABI = [\n  {\n    inputs: [\n      { name: \"from\", type: \"address\" },\n      { name: \"to\", type: \"address\" },\n      { name: \"value\", type: \"uint256\" },\n      { name: \"validAfter\", type: \"uint256\" },\n      { name: \"validBefore\", type: \"uint256\" },\n      { name: \"nonce\", type: \"bytes32\" },\n      { name: \"v\", type: \"uint8\" },\n      { name: \"r\", type: \"bytes32\" },\n      { name: \"s\", type: \"bytes32\" },\n    ],\n    name: \"transferWithAuthorization\",\n    outputs: [],\n    stateMutability: \"nonpayable\",\n    type: \"function\",\n  },\n  {\n    inputs: [\n      { name: \"from\", type: \"address\" },\n      { name: \"to\", type: \"address\" },\n      { name: \"value\", type: \"uint256\" },\n      { name: \"validAfter\", type: \"uint256\" },\n      { name: \"validBefore\", type: \"uint256\" },\n      { name: \"nonce\", type: \"bytes32\" },\n      { name: \"signature\", type: \"bytes\" },\n    ],\n    name: \"transferWithAuthorization\",\n    outputs: [],\n    stateMutability: \"nonpayable\",\n    type: \"function\",\n  },\n  {\n    inputs: [{ name: \"account\", type: \"address\" }],\n    name: \"balanceOf\",\n    outputs: [{ name: \"\", type: \"uint256\" }],\n    stateMutability: \"view\",\n    type: \"function\",\n  },\n  {\n    inputs: [],\n    name: \"version\",\n    outputs: [{ name: \"\", type: \"string\" }],\n    stateMutability: \"view\",\n    type: \"function\",\n  },\n] as const;\n\n/**\n * Canonical Permit2 contract address.\n * Same address on all EVM chains via CREATE2 deployment.\n *\n * @see https://github.com/Uniswap/permit2\n */\nexport const PERMIT2_ADDRESS = \"0x000000000022D473030F116dDEE9F6B43aC78BA3\" as const;\n\n/**\n * x402ExactPermit2Proxy contract address.\n * Vanity address: 0x4020...0001 for easy recognition.\n * This address is deterministic based on:\n * - Arachnid's deterministic deployer (0x4e59b44847b379578588920cA78FbF26c0B4956C)\n * - Vanity-mined salt for prefix 0x4020 and suffix 0001\n * - Contract bytecode + constructor args (PERMIT2_ADDRESS)\n */\nexport const x402ExactPermit2ProxyAddress = \"0x4020615294c913F045dc10f0a5cdEbd86c280001\" as const;\n\n/**\n * x402UptoPermit2Proxy contract address.\n * Vanity address: 0x4020...0002 for easy recognition.\n * This address is deterministic based on:\n * - Arachnid's deterministic deployer (0x4e59b44847b379578588920cA78FbF26c0B4956C)\n * - Vanity-mined salt for prefix 0x4020 and suffix 0002\n * - Contract bytecode + constructor args (PERMIT2_ADDRESS)\n */\nexport const x402UptoPermit2ProxyAddress = \"0x4020633461b2895a48930Ff97eE8fCdE8E520002\" as const;\n\n/**\n * x402UptoPermit2Proxy ABI - settle function for upto payment scheme (variable amounts).\n */\nexport const x402UptoPermit2ProxyABI = [\n  {\n    type: \"function\",\n    name: \"PERMIT2\",\n    inputs: [],\n    outputs: [{ name: \"\", type: \"address\", internalType: \"contract ISignatureTransfer\" }],\n    stateMutability: \"view\",\n  },\n  {\n    type: \"function\",\n    name: \"WITNESS_TYPEHASH\",\n    inputs: [],\n    outputs: [{ name: \"\", type: \"bytes32\", internalType: \"bytes32\" }],\n    stateMutability: \"view\",\n  },\n  {\n    type: \"function\",\n    name: \"WITNESS_TYPE_STRING\",\n    inputs: [],\n    outputs: [{ name: \"\", type: \"string\", internalType: \"string\" }],\n    stateMutability: \"view\",\n  },\n  {\n    type: \"function\",\n    name: \"initialize\",\n    inputs: [{ name: \"_permit2\", type: \"address\", internalType: \"address\" }],\n    outputs: [],\n    stateMutability: \"nonpayable\",\n  },\n  {\n    type: \"function\",\n    name: \"settle\",\n    inputs: [\n      {\n        name: \"permit\",\n        type: \"tuple\",\n        internalType: \"struct ISignatureTransfer.PermitTransferFrom\",\n        components: [\n          {\n            name: \"permitted\",\n            type: \"tuple\",\n            internalType: \"struct ISignatureTransfer.TokenPermissions\",\n            components: [\n              { name: \"token\", type: \"address\", internalType: \"address\" },\n              { name: \"amount\", type: \"uint256\", internalType: \"uint256\" },\n            ],\n          },\n          { name: \"nonce\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"deadline\", type: \"uint256\", internalType: \"uint256\" },\n        ],\n      },\n      { name: \"owner\", type: \"address\", internalType: \"address\" },\n      {\n        name: \"witness\",\n        type: \"tuple\",\n        internalType: \"struct x402BasePermit2Proxy.Witness\",\n        components: [\n          { name: \"to\", type: \"address\", internalType: \"address\" },\n          { name: \"validAfter\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"extra\", type: \"bytes\", internalType: \"bytes\" },\n        ],\n      },\n      { name: \"signature\", type: \"bytes\", internalType: \"bytes\" },\n    ],\n    outputs: [],\n    stateMutability: \"nonpayable\",\n  },\n  {\n    type: \"function\",\n    name: \"settleWithPermit\",\n    inputs: [\n      {\n        name: \"permit2612\",\n        type: \"tuple\",\n        internalType: \"struct x402BasePermit2Proxy.EIP2612Permit\",\n        components: [\n          { name: \"value\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"deadline\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"r\", type: \"bytes32\", internalType: \"bytes32\" },\n          { name: \"s\", type: \"bytes32\", internalType: \"bytes32\" },\n          { name: \"v\", type: \"uint8\", internalType: \"uint8\" },\n        ],\n      },\n      {\n        name: \"permit\",\n        type: \"tuple\",\n        internalType: \"struct ISignatureTransfer.PermitTransferFrom\",\n        components: [\n          {\n            name: \"permitted\",\n            type: \"tuple\",\n            internalType: \"struct ISignatureTransfer.TokenPermissions\",\n            components: [\n              { name: \"token\", type: \"address\", internalType: \"address\" },\n              { name: \"amount\", type: \"uint256\", internalType: \"uint256\" },\n            ],\n          },\n          { name: \"nonce\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"deadline\", type: \"uint256\", internalType: \"uint256\" },\n        ],\n      },\n      { name: \"owner\", type: \"address\", internalType: \"address\" },\n      {\n        name: \"witness\",\n        type: \"tuple\",\n        internalType: \"struct x402BasePermit2Proxy.Witness\",\n        components: [\n          { name: \"to\", type: \"address\", internalType: \"address\" },\n          { name: \"validAfter\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"extra\", type: \"bytes\", internalType: \"bytes\" },\n        ],\n      },\n      { name: \"signature\", type: \"bytes\", internalType: \"bytes\" },\n    ],\n    outputs: [],\n    stateMutability: \"nonpayable\",\n  },\n  { type: \"event\", name: \"Settled\", inputs: [], anonymous: false },\n  { type: \"event\", name: \"SettledWithPermit\", inputs: [], anonymous: false },\n  { type: \"error\", name: \"AlreadyInitialized\", inputs: [] },\n  { type: \"error\", name: \"AmountExceedsPermitted\", inputs: [] },\n  { type: \"error\", name: \"InvalidDestination\", inputs: [] },\n  { type: \"error\", name: \"InvalidOwner\", inputs: [] },\n  { type: \"error\", name: \"InvalidPermit2Address\", inputs: [] },\n  { type: \"error\", name: \"PaymentTooEarly\", inputs: [] },\n  { type: \"error\", name: \"ReentrancyGuardReentrantCall\", inputs: [] },\n] as const;\n\n/**\n * x402ExactPermit2Proxy ABI - settle function for exact payment scheme.\n */\nexport const x402ExactPermit2ProxyABI = [\n  {\n    type: \"function\",\n    name: \"PERMIT2\",\n    inputs: [],\n    outputs: [{ name: \"\", type: \"address\", internalType: \"contract ISignatureTransfer\" }],\n    stateMutability: \"view\",\n  },\n  {\n    type: \"function\",\n    name: \"WITNESS_TYPEHASH\",\n    inputs: [],\n    outputs: [{ name: \"\", type: \"bytes32\", internalType: \"bytes32\" }],\n    stateMutability: \"view\",\n  },\n  {\n    type: \"function\",\n    name: \"WITNESS_TYPE_STRING\",\n    inputs: [],\n    outputs: [{ name: \"\", type: \"string\", internalType: \"string\" }],\n    stateMutability: \"view\",\n  },\n  {\n    type: \"function\",\n    name: \"initialize\",\n    inputs: [{ name: \"_permit2\", type: \"address\", internalType: \"address\" }],\n    outputs: [],\n    stateMutability: \"nonpayable\",\n  },\n  {\n    type: \"function\",\n    name: \"settle\",\n    inputs: [\n      {\n        name: \"permit\",\n        type: \"tuple\",\n        internalType: \"struct ISignatureTransfer.PermitTransferFrom\",\n        components: [\n          {\n            name: \"permitted\",\n            type: \"tuple\",\n            internalType: \"struct ISignatureTransfer.TokenPermissions\",\n            components: [\n              { name: \"token\", type: \"address\", internalType: \"address\" },\n              { name: \"amount\", type: \"uint256\", internalType: \"uint256\" },\n            ],\n          },\n          { name: \"nonce\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"deadline\", type: \"uint256\", internalType: \"uint256\" },\n        ],\n      },\n      { name: \"owner\", type: \"address\", internalType: \"address\" },\n      {\n        name: \"witness\",\n        type: \"tuple\",\n        internalType: \"struct x402BasePermit2Proxy.Witness\",\n        components: [\n          { name: \"to\", type: \"address\", internalType: \"address\" },\n          { name: \"validAfter\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"extra\", type: \"bytes\", internalType: \"bytes\" },\n        ],\n      },\n      { name: \"signature\", type: \"bytes\", internalType: \"bytes\" },\n    ],\n    outputs: [],\n    stateMutability: \"nonpayable\",\n  },\n  {\n    type: \"function\",\n    name: \"settleWithPermit\",\n    inputs: [\n      {\n        name: \"permit2612\",\n        type: \"tuple\",\n        internalType: \"struct x402BasePermit2Proxy.EIP2612Permit\",\n        components: [\n          { name: \"value\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"deadline\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"r\", type: \"bytes32\", internalType: \"bytes32\" },\n          { name: \"s\", type: \"bytes32\", internalType: \"bytes32\" },\n          { name: \"v\", type: \"uint8\", internalType: \"uint8\" },\n        ],\n      },\n      {\n        name: \"permit\",\n        type: \"tuple\",\n        internalType: \"struct ISignatureTransfer.PermitTransferFrom\",\n        components: [\n          {\n            name: \"permitted\",\n            type: \"tuple\",\n            internalType: \"struct ISignatureTransfer.TokenPermissions\",\n            components: [\n              { name: \"token\", type: \"address\", internalType: \"address\" },\n              { name: \"amount\", type: \"uint256\", internalType: \"uint256\" },\n            ],\n          },\n          { name: \"nonce\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"deadline\", type: \"uint256\", internalType: \"uint256\" },\n        ],\n      },\n      { name: \"owner\", type: \"address\", internalType: \"address\" },\n      {\n        name: \"witness\",\n        type: \"tuple\",\n        internalType: \"struct x402BasePermit2Proxy.Witness\",\n        components: [\n          { name: \"to\", type: \"address\", internalType: \"address\" },\n          { name: \"validAfter\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"extra\", type: \"bytes\", internalType: \"bytes\" },\n        ],\n      },\n      { name: \"signature\", type: \"bytes\", internalType: \"bytes\" },\n    ],\n    outputs: [],\n    stateMutability: \"nonpayable\",\n  },\n  { type: \"event\", name: \"Settled\", inputs: [], anonymous: false },\n  { type: \"event\", name: \"SettledWithPermit\", inputs: [], anonymous: false },\n  { type: \"error\", name: \"AlreadyInitialized\", inputs: [] },\n  { type: \"error\", name: \"InvalidDestination\", inputs: [] },\n  { type: \"error\", name: \"InvalidOwner\", inputs: [] },\n  { type: \"error\", name: \"InvalidPermit2Address\", inputs: [] },\n  { type: \"error\", name: \"PaymentTooEarly\", inputs: [] },\n  { type: \"error\", name: \"ReentrancyGuardReentrantCall\", inputs: [] },\n] as const;\n","import { toHex } from \"viem\";\nimport { EVM_NETWORK_CHAIN_ID_MAP, EvmNetworkV1 } from \"./v1\";\n\n/**\n * Extract chain ID from network string (e.g., \"base-sepolia\" -> 84532)\n * Used by v1 implementations\n *\n * @param network - The network identifier\n * @returns The numeric chain ID\n * @throws Error if the network is not supported\n */\nexport function getEvmChainId(network: EvmNetworkV1): number {\n  const chainId = EVM_NETWORK_CHAIN_ID_MAP[network];\n  if (!chainId) {\n    throw new Error(`Unsupported network: ${network}`);\n  }\n  return chainId;\n}\n\n/**\n * Get the crypto object from the global scope.\n *\n * @returns The crypto object\n * @throws Error if crypto API is not available\n */\nfunction getCrypto(): Crypto {\n  const cryptoObj = globalThis.crypto as Crypto | undefined;\n  if (!cryptoObj) {\n    throw new Error(\"Crypto API not available\");\n  }\n  return cryptoObj;\n}\n\n/**\n * Create a random 32-byte nonce for EIP-3009 authorization.\n *\n * @returns A hex-encoded 32-byte nonce\n */\nexport function createNonce(): `0x${string}` {\n  return toHex(getCrypto().getRandomValues(new Uint8Array(32)));\n}\n\n/**\n * Creates a random 256-bit nonce for Permit2.\n * Permit2 uses uint256 nonces (not bytes32 like EIP-3009).\n *\n * @returns A string representation of the random nonce\n */\nexport function createPermit2Nonce(): string {\n  const randomBytes = getCrypto().getRandomValues(new Uint8Array(32));\n  return BigInt(toHex(randomBytes)).toString();\n}\n","import {\n  PaymentPayload,\n  PaymentPayloadV1,\n  PaymentRequirements,\n  SchemeNetworkFacilitator,\n  SettleResponse,\n  VerifyResponse,\n} from \"@x402/core/types\";\nimport { PaymentRequirementsV1 } from \"@x402/core/types/v1\";\nimport { getAddress, Hex, isAddressEqual, parseErc6492Signature, parseSignature } from \"viem\";\nimport { authorizationTypes, eip3009ABI } from \"../../../constants\";\nimport { FacilitatorEvmSigner } from \"../../../signer\";\nimport { ExactEvmPayloadV1 } from \"../../../types\";\nimport { getEvmChainId } from \"../../../utils\";\nimport { EvmNetworkV1 } from \"../../../v1\";\n\nexport interface ExactEvmSchemeV1Config {\n  /**\n   * If enabled, the facilitator will deploy ERC-4337 smart wallets\n   * via EIP-6492 when encountering undeployed contract signatures.\n   *\n   * @default false\n   */\n  deployERC4337WithEIP6492?: boolean;\n}\n\n/**\n * EVM facilitator implementation for the Exact payment scheme (V1).\n */\nexport class ExactEvmSchemeV1 implements SchemeNetworkFacilitator {\n  readonly scheme = \"exact\";\n  readonly caipFamily = \"eip155:*\";\n  private readonly config: Required<ExactEvmSchemeV1Config>;\n\n  /**\n   * Creates a new ExactEvmFacilitatorV1 instance.\n   *\n   * @param signer - The EVM signer for facilitator operations\n   * @param config - Optional configuration for the facilitator\n   */\n  constructor(\n    private readonly signer: FacilitatorEvmSigner,\n    config?: ExactEvmSchemeV1Config,\n  ) {\n    this.config = {\n      deployERC4337WithEIP6492: config?.deployERC4337WithEIP6492 ?? false,\n    };\n  }\n\n  /**\n   * Get mechanism-specific extra data for the supported kinds endpoint.\n   * For EVM, no extra data is needed.\n   *\n   * @param _ - The network identifier (unused for EVM)\n   * @returns undefined (EVM has no extra data)\n   */\n  getExtra(_: string): Record<string, unknown> | undefined {\n    return undefined;\n  }\n\n  /**\n   * Get signer addresses used by this facilitator.\n   * Returns all addresses this facilitator can use for signing/settling transactions.\n   *\n   * @param _ - The network identifier (unused for EVM, addresses are network-agnostic)\n   * @returns Array of facilitator wallet addresses\n   */\n  getSigners(_: string): string[] {\n    return [...this.signer.getAddresses()];\n  }\n\n  /**\n   * Verifies a payment payload (V1).\n   *\n   * @param payload - The payment payload to verify\n   * @param requirements - The payment requirements\n   * @returns Promise resolving to verification response\n   */\n  async verify(\n    payload: PaymentPayload,\n    requirements: PaymentRequirements,\n  ): Promise<VerifyResponse> {\n    const requirementsV1 = requirements as unknown as PaymentRequirementsV1;\n    const payloadV1 = payload as unknown as PaymentPayloadV1;\n    const exactEvmPayload = payload.payload as ExactEvmPayloadV1;\n\n    // Verify scheme matches\n    if (payloadV1.scheme !== \"exact\" || requirements.scheme !== \"exact\") {\n      return {\n        isValid: false,\n        invalidReason: \"unsupported_scheme\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Get chain configuration\n    let chainId: number;\n    try {\n      chainId = getEvmChainId(payloadV1.network as EvmNetworkV1);\n    } catch {\n      return {\n        isValid: false,\n        invalidReason: `invalid_network`,\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    if (!requirements.extra?.name || !requirements.extra?.version) {\n      return {\n        isValid: false,\n        invalidReason: \"missing_eip712_domain\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    const { name, version } = requirements.extra;\n    const erc20Address = getAddress(requirements.asset);\n\n    // Verify network matches\n    if (payloadV1.network !== requirements.network) {\n      return {\n        isValid: false,\n        invalidReason: \"network_mismatch\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Build typed data for signature verification\n    const permitTypedData = {\n      types: authorizationTypes,\n      primaryType: \"TransferWithAuthorization\" as const,\n      domain: {\n        name,\n        version,\n        chainId,\n        verifyingContract: erc20Address,\n      },\n      message: {\n        from: exactEvmPayload.authorization.from,\n        to: exactEvmPayload.authorization.to,\n        value: BigInt(exactEvmPayload.authorization.value),\n        validAfter: BigInt(exactEvmPayload.authorization.validAfter),\n        validBefore: BigInt(exactEvmPayload.authorization.validBefore),\n        nonce: exactEvmPayload.authorization.nonce,\n      },\n    };\n\n    // Verify signature\n    try {\n      const recoveredAddress = await this.signer.verifyTypedData({\n        address: exactEvmPayload.authorization.from,\n        ...permitTypedData,\n        signature: exactEvmPayload.signature!,\n      });\n\n      if (!recoveredAddress) {\n        return {\n          isValid: false,\n          invalidReason: \"invalid_exact_evm_payload_signature\",\n          payer: exactEvmPayload.authorization.from,\n        };\n      }\n    } catch {\n      // Signature verification failed - could be an undeployed smart wallet\n      // Check if smart wallet is deployed\n      const signature = exactEvmPayload.signature!;\n      const signatureLength = signature.startsWith(\"0x\") ? signature.length - 2 : signature.length;\n      const isSmartWallet = signatureLength > 130; // 65 bytes = 130 hex chars for EOA\n\n      if (isSmartWallet) {\n        const payerAddress = exactEvmPayload.authorization.from;\n        const bytecode = await this.signer.getCode({ address: payerAddress });\n\n        if (!bytecode || bytecode === \"0x\") {\n          // Wallet is not deployed. Check if it's EIP-6492 with deployment info.\n          // EIP-6492 signatures contain factory address and calldata needed for deployment.\n          // Non-EIP-6492 undeployed wallets cannot succeed (no way to deploy them).\n          const erc6492Data = parseErc6492Signature(signature);\n          const hasDeploymentInfo =\n            erc6492Data.address &&\n            erc6492Data.data &&\n            !isAddressEqual(erc6492Data.address, \"0x0000000000000000000000000000000000000000\");\n\n          if (!hasDeploymentInfo) {\n            // Non-EIP-6492 undeployed smart wallet - will always fail at settlement\n            // since EIP-3009 requires on-chain EIP-1271 validation\n            return {\n              isValid: false,\n              invalidReason: \"invalid_exact_evm_payload_undeployed_smart_wallet\",\n              payer: payerAddress,\n            };\n          }\n          // EIP-6492 signature with deployment info - allow through\n          // Facilitators with sponsored deployment support can handle this in settle()\n        } else {\n          // Wallet is deployed but signature still failed - invalid signature\n          return {\n            isValid: false,\n            invalidReason: \"invalid_exact_evm_payload_signature\",\n            payer: exactEvmPayload.authorization.from,\n          };\n        }\n      } else {\n        // EOA signature failed\n        return {\n          isValid: false,\n          invalidReason: \"invalid_exact_evm_payload_signature\",\n          payer: exactEvmPayload.authorization.from,\n        };\n      }\n    }\n\n    // Verify payment recipient matches\n    if (getAddress(exactEvmPayload.authorization.to) !== getAddress(requirements.payTo)) {\n      return {\n        isValid: false,\n        invalidReason: \"invalid_exact_evm_payload_recipient_mismatch\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Verify validBefore is in the future (with 6 second buffer for block time)\n    const now = Math.floor(Date.now() / 1000);\n    if (BigInt(exactEvmPayload.authorization.validBefore) < BigInt(now + 6)) {\n      return {\n        isValid: false,\n        invalidReason: \"invalid_exact_evm_payload_authorization_valid_before\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Verify validAfter is not in the future\n    if (BigInt(exactEvmPayload.authorization.validAfter) > BigInt(now)) {\n      return {\n        isValid: false,\n        invalidReason: \"invalid_exact_evm_payload_authorization_valid_after\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Check balance\n    try {\n      const balance = (await this.signer.readContract({\n        address: erc20Address,\n        abi: eip3009ABI,\n        functionName: \"balanceOf\",\n        args: [exactEvmPayload.authorization.from],\n      })) as bigint;\n\n      if (BigInt(balance) < BigInt(requirementsV1.maxAmountRequired)) {\n        return {\n          isValid: false,\n          invalidReason: \"insufficient_funds\",\n          invalidMessage: `Insufficient funds to complete the payment. Required: ${requirementsV1.maxAmountRequired} ${requirements.asset}, Available: ${balance.toString()} ${requirements.asset}. Please add funds to your wallet and try again.`,\n          payer: exactEvmPayload.authorization.from,\n        };\n      }\n    } catch {\n      // If we can't check balance, continue with other validations\n    }\n\n    // Verify amount is sufficient\n    if (BigInt(exactEvmPayload.authorization.value) < BigInt(requirementsV1.maxAmountRequired)) {\n      return {\n        isValid: false,\n        invalidReason: \"invalid_exact_evm_payload_authorization_value\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    return {\n      isValid: true,\n      invalidReason: undefined,\n      payer: exactEvmPayload.authorization.from,\n    };\n  }\n\n  /**\n   * Settles a payment by executing the transfer (V1).\n   *\n   * @param payload - The payment payload to settle\n   * @param requirements - The payment requirements\n   * @returns Promise resolving to settlement response\n   */\n  async settle(\n    payload: PaymentPayload,\n    requirements: PaymentRequirements,\n  ): Promise<SettleResponse> {\n    const payloadV1 = payload as unknown as PaymentPayloadV1;\n    const exactEvmPayload = payload.payload as ExactEvmPayloadV1;\n\n    // Re-verify before settling\n    const valid = await this.verify(payload, requirements);\n    if (!valid.isValid) {\n      return {\n        success: false,\n        network: payloadV1.network,\n        transaction: \"\",\n        errorReason: valid.invalidReason ?? \"invalid_scheme\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    try {\n      // Parse ERC-6492 signature if applicable\n      const parseResult = parseErc6492Signature(exactEvmPayload.signature!);\n      const { signature, address: factoryAddress, data: factoryCalldata } = parseResult;\n\n      // Deploy ERC-4337 smart wallet via EIP-6492 if configured and needed\n      if (\n        this.config.deployERC4337WithEIP6492 &&\n        factoryAddress &&\n        factoryCalldata &&\n        !isAddressEqual(factoryAddress, \"0x0000000000000000000000000000000000000000\")\n      ) {\n        // Check if smart wallet is already deployed\n        const payerAddress = exactEvmPayload.authorization.from;\n        const bytecode = await this.signer.getCode({ address: payerAddress });\n\n        if (!bytecode || bytecode === \"0x\") {\n          // Wallet not deployed - attempt deployment\n          try {\n            console.log(`Deploying ERC-4337 smart wallet for ${payerAddress} via EIP-6492`);\n\n            // Send the factory calldata directly as a transaction\n            // The factoryCalldata already contains the complete encoded function call\n            const deployTx = await this.signer.sendTransaction({\n              to: factoryAddress as Hex,\n              data: factoryCalldata as Hex,\n            });\n\n            // Wait for deployment transaction\n            await this.signer.waitForTransactionReceipt({ hash: deployTx });\n            console.log(`Successfully deployed smart wallet for ${payerAddress}`);\n          } catch (deployError) {\n            console.error(\"Smart wallet deployment failed:\", deployError);\n            // Deployment failed - cannot proceed\n            throw deployError;\n          }\n        } else {\n          console.log(`Smart wallet for ${payerAddress} already deployed, skipping deployment`);\n        }\n      }\n\n      // Determine if this is an ECDSA signature (EOA) or smart wallet signature\n      // ECDSA signatures are exactly 65 bytes (130 hex chars without 0x)\n      const signatureLength = signature.startsWith(\"0x\") ? signature.length - 2 : signature.length;\n      const isECDSA = signatureLength === 130;\n\n      let tx: Hex;\n      if (isECDSA) {\n        // For EOA wallets, parse signature into v, r, s and use that overload\n        const parsedSig = parseSignature(signature);\n\n        tx = await this.signer.writeContract({\n          address: getAddress(requirements.asset),\n          abi: eip3009ABI,\n          functionName: \"transferWithAuthorization\",\n          args: [\n            getAddress(exactEvmPayload.authorization.from),\n            getAddress(exactEvmPayload.authorization.to),\n            BigInt(exactEvmPayload.authorization.value),\n            BigInt(exactEvmPayload.authorization.validAfter),\n            BigInt(exactEvmPayload.authorization.validBefore),\n            exactEvmPayload.authorization.nonce,\n            (parsedSig.v as number | undefined) || parsedSig.yParity,\n            parsedSig.r,\n            parsedSig.s,\n          ],\n        });\n      } else {\n        // For smart wallets, use the bytes signature overload\n        // The signature contains WebAuthn/P256 or other ERC-1271 compatible signature data\n        tx = await this.signer.writeContract({\n          address: getAddress(requirements.asset),\n          abi: eip3009ABI,\n          functionName: \"transferWithAuthorization\",\n          args: [\n            getAddress(exactEvmPayload.authorization.from),\n            getAddress(exactEvmPayload.authorization.to),\n            BigInt(exactEvmPayload.authorization.value),\n            BigInt(exactEvmPayload.authorization.validAfter),\n            BigInt(exactEvmPayload.authorization.validBefore),\n            exactEvmPayload.authorization.nonce,\n            signature,\n          ],\n        });\n      }\n\n      // Wait for transaction confirmation\n      const receipt = await this.signer.waitForTransactionReceipt({ hash: tx });\n\n      if (receipt.status !== \"success\") {\n        return {\n          success: false,\n          errorReason: \"invalid_transaction_state\",\n          transaction: tx,\n          network: payloadV1.network,\n          payer: exactEvmPayload.authorization.from,\n        };\n      }\n\n      return {\n        success: true,\n        transaction: tx,\n        network: payloadV1.network,\n        payer: exactEvmPayload.authorization.from,\n      };\n    } catch (error) {\n      console.error(\"Failed to settle transaction:\", error);\n      return {\n        success: false,\n        errorReason: \"transaction_failed\",\n        transaction: \"\",\n        network: payloadV1.network,\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n  }\n}\n","export { ExactEvmSchemeV1 } from \"../exact/v1\";\n\nexport const EVM_NETWORK_CHAIN_ID_MAP = {\n  ethereum: 1,\n  sepolia: 11155111,\n  abstract: 2741,\n  \"abstract-testnet\": 11124,\n  \"base-sepolia\": 84532,\n  base: 8453,\n  \"avalanche-fuji\": 43113,\n  avalanche: 43114,\n  iotex: 4689,\n  sei: 1329,\n  \"sei-testnet\": 1328,\n  polygon: 137,\n  \"polygon-amoy\": 80002,\n  peaq: 3338,\n  story: 1514,\n  educhain: 41923,\n  \"skale-base-sepolia\": 324705682,\n} as const;\n\nexport type EvmNetworkV1 = keyof typeof EVM_NETWORK_CHAIN_ID_MAP;\n\nexport const NETWORKS: string[] = Object.keys(EVM_NETWORK_CHAIN_ID_MAP);\n"],"mappings":";;;;;;;;;;;;;;;;;;;;AAAA;AAAA;AAAA;AAAA;AAAA;;;ACOA,IAAAA,eAA2B;;;ACNpB,IAAM,qBAAqB;AAAA,EAChC,2BAA2B;AAAA,IACzB,EAAE,MAAM,QAAQ,MAAM,UAAU;AAAA,IAChC,EAAE,MAAM,MAAM,MAAM,UAAU;AAAA,IAC9B,EAAE,MAAM,SAAS,MAAM,UAAU;AAAA,IACjC,EAAE,MAAM,cAAc,MAAM,UAAU;AAAA,IACtC,EAAE,MAAM,eAAe,MAAM,UAAU;AAAA,IACvC,EAAE,MAAM,SAAS,MAAM,UAAU;AAAA,EACnC;AACF;;;ACVA,IAAAC,eAAsB;;;ACStB,kBAAuF;;;ACPhF,IAAM,2BAA2B;AAAA,EACtC,UAAU;AAAA,EACV,SAAS;AAAA,EACT,UAAU;AAAA,EACV,oBAAoB;AAAA,EACpB,gBAAgB;AAAA,EAChB,MAAM;AAAA,EACN,kBAAkB;AAAA,EAClB,WAAW;AAAA,EACX,OAAO;AAAA,EACP,KAAK;AAAA,EACL,eAAe;AAAA,EACf,SAAS;AAAA,EACT,gBAAgB;AAAA,EAChB,MAAM;AAAA,EACN,OAAO;AAAA,EACP,UAAU;AAAA,EACV,sBAAsB;AACxB;AAIO,IAAM,WAAqB,OAAO,KAAK,wBAAwB;;;AFb/D,SAAS,cAAc,SAA+B;AAC3D,QAAM,UAAU,yBAAyB,OAAO;AAChD,MAAI,CAAC,SAAS;AACZ,UAAM,IAAI,MAAM,wBAAwB,OAAO,EAAE;AAAA,EACnD;AACA,SAAO;AACT;AAQA,SAAS,YAAoB;AAC3B,QAAM,YAAY,WAAW;AAC7B,MAAI,CAAC,WAAW;AACd,UAAM,IAAI,MAAM,0BAA0B;AAAA,EAC5C;AACA,SAAO;AACT;AAOO,SAAS,cAA6B;AAC3C,aAAO,oBAAM,UAAU,EAAE,gBAAgB,IAAI,WAAW,EAAE,CAAC,CAAC;AAC9D;;;AFvBO,IAAM,mBAAN,MAAsD;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA,EAQ3D,YAA6B,QAAyB;AAAzB;AAP7B,SAAS,SAAS;AAAA,EAOqC;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA,EASvD,MAAM,qBACJ,aACA,qBAGA;AACA,UAAM,aAAa;AACnB,UAAM,QAAQ,YAAY;AAC1B,UAAM,MAAM,KAAK,MAAM,KAAK,IAAI,IAAI,GAAI;AAExC,UAAM,gBAAoD;AAAA,MACxD,MAAM,KAAK,OAAO;AAAA,MAClB,QAAI,yBAAW,WAAW,KAAK;AAAA,MAC/B,OAAO,WAAW;AAAA,MAClB,aAAa,MAAM,KAAK,SAAS;AAAA;AAAA,MACjC,cAAc,MAAM,WAAW,mBAAmB,SAAS;AAAA,MAC3D;AAAA,IACF;AAGA,UAAM,YAAY,MAAM,KAAK,kBAAkB,eAAe,UAAU;AAExE,UAAM,UAA6B;AAAA,MACjC;AAAA,MACA;AAAA,IACF;AAEA,WAAO;AAAA,MACL;AAAA,MACA,QAAQ,WAAW;AAAA,MACnB,SAAS,WAAW;AAAA,MACpB;AAAA,IACF;AAAA,EACF;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA,EASA,MAAc,kBACZ,eACA,cACwB;AACxB,UAAM,UAAU,cAAc,aAAa,OAAuB;AAElE,QAAI,CAAC,aAAa,OAAO,QAAQ,CAAC,aAAa,OAAO,SAAS;AAC7D,YAAM,IAAI;AAAA,QACR,4FAA4F,aAAa,KAAK;AAAA,MAChH;AAAA,IACF;AAEA,UAAM,EAAE,MAAM,QAAQ,IAAI,aAAa;AAEvC,UAAM,SAAS;AAAA,MACb;AAAA,MACA;AAAA,MACA;AAAA,MACA,uBAAmB,yBAAW,aAAa,KAAK;AAAA,IAClD;AAEA,UAAM,UAAU;AAAA,MACd,UAAM,yBAAW,cAAc,IAAI;AAAA,MACnC,QAAI,yBAAW,cAAc,EAAE;AAAA,MAC/B,OAAO,OAAO,cAAc,KAAK;AAAA,MACjC,YAAY,OAAO,cAAc,UAAU;AAAA,MAC3C,aAAa,OAAO,cAAc,WAAW;AAAA,MAC7C,OAAO,cAAc;AAAA,IACvB;AAEA,WAAO,MAAM,KAAK,OAAO,cAAc;AAAA,MACrC;AAAA,MACA,OAAO;AAAA,MACP,aAAa;AAAA,MACb;AAAA,IACF,CAAC;AAAA,EACH;AACF;","names":["import_viem","import_viem"]}

dist/cjs/exact/v1/facilitator/index.js

@@ -23,3 +23,3 @@ "use strict";
 __export(facilitator_exports, {
-  ExactEvmSchemeV1: () => ExactEvmSchemeV1
+  ExactEvmSchemeV1: () => ExactEvmSchemeV12
 });
@@ -29,3 +29,3 @@ module.exports = __toCommonJS(facilitator_exports);
 // src/exact/v1/facilitator/scheme.ts
-var import_viem2 = require("viem");
+var import_viem3 = require("viem");
 
@@ -93,17 +93,40 @@ // src/constants.ts
 // src/utils.ts
+var import_viem2 = require("viem");
+
+// src/exact/v1/client/scheme.ts
 var import_viem = require("viem");
+
+// src/v1/index.ts
+var EVM_NETWORK_CHAIN_ID_MAP = {
+  ethereum: 1,
+  sepolia: 11155111,
+  abstract: 2741,
+  "abstract-testnet": 11124,
+  "base-sepolia": 84532,
+  base: 8453,
+  "avalanche-fuji": 43113,
+  avalanche: 43114,
+  iotex: 4689,
+  sei: 1329,
+  "sei-testnet": 1328,
+  polygon: 137,
+  "polygon-amoy": 80002,
+  peaq: 3338,
+  story: 1514,
+  educhain: 41923,
+  "skale-base-sepolia": 324705682
+};
+var NETWORKS = Object.keys(EVM_NETWORK_CHAIN_ID_MAP);
+
+// src/utils.ts
 function getEvmChainId(network) {
-  const networkMap = {
-    base: 8453,
-    "base-sepolia": 84532,
-    ethereum: 1,
-    sepolia: 11155111,
-    polygon: 137,
-    "polygon-amoy": 80002
-  };
-  return networkMap[network] || 1;
+  const chainId = EVM_NETWORK_CHAIN_ID_MAP[network];
+  if (!chainId) {
+    throw new Error(`Unsupported network: ${network}`);
+  }
+  return chainId;
 }
 
 // src/exact/v1/facilitator/scheme.ts
-var ExactEvmSchemeV1 = class {
+var ExactEvmSchemeV12 = class {
   /**
@@ -161,3 +184,12 @@ * Creates a new ExactEvmFacilitatorV1 instance.
     }
-    const chainId = getEvmChainId(payloadV1.network);
+    let chainId;
+    try {
+      chainId = getEvmChainId(payloadV1.network);
+    } catch {
+      return {
+        isValid: false,
+        invalidReason: `invalid_network`,
+        payer: exactEvmPayload.authorization.from
+      };
+    }
     if (!requirements.extra?.name || !requirements.extra?.version) {
@@ -171,3 +203,3 @@ return {
     const { name, version } = requirements.extra;
-    const erc20Address = (0, import_viem2.getAddress)(requirements.asset);
+    const erc20Address = (0, import_viem3.getAddress)(requirements.asset);
     if (payloadV1.network !== requirements.network) {
@@ -219,4 +251,4 @@ return {
         if (!bytecode || bytecode === "0x") {
-          const erc6492Data = (0, import_viem2.parseErc6492Signature)(signature);
-          const hasDeploymentInfo = erc6492Data.address && erc6492Data.data && !(0, import_viem2.isAddressEqual)(erc6492Data.address, "0x0000000000000000000000000000000000000000");
+          const erc6492Data = (0, import_viem3.parseErc6492Signature)(signature);
+          const hasDeploymentInfo = erc6492Data.address && erc6492Data.data && !(0, import_viem3.isAddressEqual)(erc6492Data.address, "0x0000000000000000000000000000000000000000");
           if (!hasDeploymentInfo) {
@@ -244,3 +276,3 @@ return {
     }
-    if ((0, import_viem2.getAddress)(exactEvmPayload.authorization.to) !== (0, import_viem2.getAddress)(requirements.payTo)) {
+    if ((0, import_viem3.getAddress)(exactEvmPayload.authorization.to) !== (0, import_viem3.getAddress)(requirements.payTo)) {
       return {
@@ -278,2 +310,3 @@ isValid: false,
           invalidReason: "insufficient_funds",
+          invalidMessage: `Insufficient funds to complete the payment. Required: ${requirementsV1.maxAmountRequired} ${requirements.asset}, Available: ${balance.toString()} ${requirements.asset}. Please add funds to your wallet and try again.`,
           payer: exactEvmPayload.authorization.from
@@ -318,5 +351,5 @@ };
     try {
-      const parseResult = (0, import_viem2.parseErc6492Signature)(exactEvmPayload.signature);
+      const parseResult = (0, import_viem3.parseErc6492Signature)(exactEvmPayload.signature);
       const { signature, address: factoryAddress, data: factoryCalldata } = parseResult;
-      if (this.config.deployERC4337WithEIP6492 && factoryAddress && factoryCalldata && !(0, import_viem2.isAddressEqual)(factoryAddress, "0x0000000000000000000000000000000000000000")) {
+      if (this.config.deployERC4337WithEIP6492 && factoryAddress && factoryCalldata && !(0, import_viem3.isAddressEqual)(factoryAddress, "0x0000000000000000000000000000000000000000")) {
         const payerAddress = exactEvmPayload.authorization.from;
@@ -345,10 +378,10 @@ const bytecode = await this.signer.getCode({ address: payerAddress });
       if (isECDSA) {
-        const parsedSig = (0, import_viem2.parseSignature)(signature);
+        const parsedSig = (0, import_viem3.parseSignature)(signature);
         tx = await this.signer.writeContract({
-          address: (0, import_viem2.getAddress)(requirements.asset),
+          address: (0, import_viem3.getAddress)(requirements.asset),
           abi: eip3009ABI,
           functionName: "transferWithAuthorization",
           args: [
-            (0, import_viem2.getAddress)(exactEvmPayload.authorization.from),
-            (0, import_viem2.getAddress)(exactEvmPayload.authorization.to),
+            (0, import_viem3.getAddress)(exactEvmPayload.authorization.from),
+            (0, import_viem3.getAddress)(exactEvmPayload.authorization.to),
             BigInt(exactEvmPayload.authorization.value),
@@ -365,8 +398,8 @@ BigInt(exactEvmPayload.authorization.validAfter),
         tx = await this.signer.writeContract({
-          address: (0, import_viem2.getAddress)(requirements.asset),
+          address: (0, import_viem3.getAddress)(requirements.asset),
           abi: eip3009ABI,
           functionName: "transferWithAuthorization",
           args: [
-            (0, import_viem2.getAddress)(exactEvmPayload.authorization.from),
-            (0, import_viem2.getAddress)(exactEvmPayload.authorization.to),
+            (0, import_viem3.getAddress)(exactEvmPayload.authorization.from),
+            (0, import_viem3.getAddress)(exactEvmPayload.authorization.to),
             BigInt(exactEvmPayload.authorization.value),
@@ -373,0 +406,0 @@ BigInt(exactEvmPayload.authorization.validAfter),

dist/cjs/exact/v1/facilitator/index.js.map

@@ -1,1 +0,1 @@
-{"version":3,"sources":["../../../../../src/exact/v1/facilitator/index.ts","../../../../../src/exact/v1/facilitator/scheme.ts","../../../../../src/constants.ts","../../../../../src/utils.ts"],"sourcesContent":["export { ExactEvmSchemeV1 } from \"./scheme\";\nexport type { ExactEvmSchemeV1Config } from \"./scheme\";\n","import {\n  PaymentPayload,\n  PaymentPayloadV1,\n  PaymentRequirements,\n  SchemeNetworkFacilitator,\n  SettleResponse,\n  VerifyResponse,\n} from \"@x402/core/types\";\nimport { PaymentRequirementsV1 } from \"@x402/core/types/v1\";\nimport { getAddress, Hex, isAddressEqual, parseErc6492Signature, parseSignature } from \"viem\";\nimport { authorizationTypes, eip3009ABI } from \"../../../constants\";\nimport { FacilitatorEvmSigner } from \"../../../signer\";\nimport { ExactEvmPayloadV1 } from \"../../../types\";\nimport { getEvmChainId } from \"../../../utils\";\n\nexport interface ExactEvmSchemeV1Config {\n  /**\n   * If enabled, the facilitator will deploy ERC-4337 smart wallets\n   * via EIP-6492 when encountering undeployed contract signatures.\n   *\n   * @default false\n   */\n  deployERC4337WithEIP6492?: boolean;\n}\n\n/**\n * EVM facilitator implementation for the Exact payment scheme (V1).\n */\nexport class ExactEvmSchemeV1 implements SchemeNetworkFacilitator {\n  readonly scheme = \"exact\";\n  readonly caipFamily = \"eip155:*\";\n  private readonly config: Required<ExactEvmSchemeV1Config>;\n\n  /**\n   * Creates a new ExactEvmFacilitatorV1 instance.\n   *\n   * @param signer - The EVM signer for facilitator operations\n   * @param config - Optional configuration for the facilitator\n   */\n  constructor(\n    private readonly signer: FacilitatorEvmSigner,\n    config?: ExactEvmSchemeV1Config,\n  ) {\n    this.config = {\n      deployERC4337WithEIP6492: config?.deployERC4337WithEIP6492 ?? false,\n    };\n  }\n\n  /**\n   * Get mechanism-specific extra data for the supported kinds endpoint.\n   * For EVM, no extra data is needed.\n   *\n   * @param _ - The network identifier (unused for EVM)\n   * @returns undefined (EVM has no extra data)\n   */\n  getExtra(_: string): Record<string, unknown> | undefined {\n    return undefined;\n  }\n\n  /**\n   * Get signer addresses used by this facilitator.\n   * Returns all addresses this facilitator can use for signing/settling transactions.\n   *\n   * @param _ - The network identifier (unused for EVM, addresses are network-agnostic)\n   * @returns Array of facilitator wallet addresses\n   */\n  getSigners(_: string): string[] {\n    return [...this.signer.getAddresses()];\n  }\n\n  /**\n   * Verifies a payment payload (V1).\n   *\n   * @param payload - The payment payload to verify\n   * @param requirements - The payment requirements\n   * @returns Promise resolving to verification response\n   */\n  async verify(\n    payload: PaymentPayload,\n    requirements: PaymentRequirements,\n  ): Promise<VerifyResponse> {\n    const requirementsV1 = requirements as unknown as PaymentRequirementsV1;\n    const payloadV1 = payload as unknown as PaymentPayloadV1;\n    const exactEvmPayload = payload.payload as ExactEvmPayloadV1;\n\n    // Verify scheme matches\n    if (payloadV1.scheme !== \"exact\" || requirements.scheme !== \"exact\") {\n      return {\n        isValid: false,\n        invalidReason: \"unsupported_scheme\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Get chain configuration\n    const chainId = getEvmChainId(payloadV1.network);\n\n    if (!requirements.extra?.name || !requirements.extra?.version) {\n      return {\n        isValid: false,\n        invalidReason: \"missing_eip712_domain\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    const { name, version } = requirements.extra;\n    const erc20Address = getAddress(requirements.asset);\n\n    // Verify network matches\n    if (payloadV1.network !== requirements.network) {\n      return {\n        isValid: false,\n        invalidReason: \"network_mismatch\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Build typed data for signature verification\n    const permitTypedData = {\n      types: authorizationTypes,\n      primaryType: \"TransferWithAuthorization\" as const,\n      domain: {\n        name,\n        version,\n        chainId,\n        verifyingContract: erc20Address,\n      },\n      message: {\n        from: exactEvmPayload.authorization.from,\n        to: exactEvmPayload.authorization.to,\n        value: BigInt(exactEvmPayload.authorization.value),\n        validAfter: BigInt(exactEvmPayload.authorization.validAfter),\n        validBefore: BigInt(exactEvmPayload.authorization.validBefore),\n        nonce: exactEvmPayload.authorization.nonce,\n      },\n    };\n\n    // Verify signature\n    try {\n      const recoveredAddress = await this.signer.verifyTypedData({\n        address: exactEvmPayload.authorization.from,\n        ...permitTypedData,\n        signature: exactEvmPayload.signature!,\n      });\n\n      if (!recoveredAddress) {\n        return {\n          isValid: false,\n          invalidReason: \"invalid_exact_evm_payload_signature\",\n          payer: exactEvmPayload.authorization.from,\n        };\n      }\n    } catch {\n      // Signature verification failed - could be an undeployed smart wallet\n      // Check if smart wallet is deployed\n      const signature = exactEvmPayload.signature!;\n      const signatureLength = signature.startsWith(\"0x\") ? signature.length - 2 : signature.length;\n      const isSmartWallet = signatureLength > 130; // 65 bytes = 130 hex chars for EOA\n\n      if (isSmartWallet) {\n        const payerAddress = exactEvmPayload.authorization.from;\n        const bytecode = await this.signer.getCode({ address: payerAddress });\n\n        if (!bytecode || bytecode === \"0x\") {\n          // Wallet is not deployed. Check if it's EIP-6492 with deployment info.\n          // EIP-6492 signatures contain factory address and calldata needed for deployment.\n          // Non-EIP-6492 undeployed wallets cannot succeed (no way to deploy them).\n          const erc6492Data = parseErc6492Signature(signature);\n          const hasDeploymentInfo =\n            erc6492Data.address &&\n            erc6492Data.data &&\n            !isAddressEqual(erc6492Data.address, \"0x0000000000000000000000000000000000000000\");\n\n          if (!hasDeploymentInfo) {\n            // Non-EIP-6492 undeployed smart wallet - will always fail at settlement\n            // since EIP-3009 requires on-chain EIP-1271 validation\n            return {\n              isValid: false,\n              invalidReason: \"invalid_exact_evm_payload_undeployed_smart_wallet\",\n              payer: payerAddress,\n            };\n          }\n          // EIP-6492 signature with deployment info - allow through\n          // Facilitators with sponsored deployment support can handle this in settle()\n        } else {\n          // Wallet is deployed but signature still failed - invalid signature\n          return {\n            isValid: false,\n            invalidReason: \"invalid_exact_evm_payload_signature\",\n            payer: exactEvmPayload.authorization.from,\n          };\n        }\n      } else {\n        // EOA signature failed\n        return {\n          isValid: false,\n          invalidReason: \"invalid_exact_evm_payload_signature\",\n          payer: exactEvmPayload.authorization.from,\n        };\n      }\n    }\n\n    // Verify payment recipient matches\n    if (getAddress(exactEvmPayload.authorization.to) !== getAddress(requirements.payTo)) {\n      return {\n        isValid: false,\n        invalidReason: \"invalid_exact_evm_payload_recipient_mismatch\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Verify validBefore is in the future (with 6 second buffer for block time)\n    const now = Math.floor(Date.now() / 1000);\n    if (BigInt(exactEvmPayload.authorization.validBefore) < BigInt(now + 6)) {\n      return {\n        isValid: false,\n        invalidReason: \"invalid_exact_evm_payload_authorization_valid_before\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Verify validAfter is not in the future\n    if (BigInt(exactEvmPayload.authorization.validAfter) > BigInt(now)) {\n      return {\n        isValid: false,\n        invalidReason: \"invalid_exact_evm_payload_authorization_valid_after\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Check balance\n    try {\n      const balance = (await this.signer.readContract({\n        address: erc20Address,\n        abi: eip3009ABI,\n        functionName: \"balanceOf\",\n        args: [exactEvmPayload.authorization.from],\n      })) as bigint;\n\n      if (BigInt(balance) < BigInt(requirementsV1.maxAmountRequired)) {\n        return {\n          isValid: false,\n          invalidReason: \"insufficient_funds\",\n          payer: exactEvmPayload.authorization.from,\n        };\n      }\n    } catch {\n      // If we can't check balance, continue with other validations\n    }\n\n    // Verify amount is sufficient\n    if (BigInt(exactEvmPayload.authorization.value) < BigInt(requirementsV1.maxAmountRequired)) {\n      return {\n        isValid: false,\n        invalidReason: \"invalid_exact_evm_payload_authorization_value\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    return {\n      isValid: true,\n      invalidReason: undefined,\n      payer: exactEvmPayload.authorization.from,\n    };\n  }\n\n  /**\n   * Settles a payment by executing the transfer (V1).\n   *\n   * @param payload - The payment payload to settle\n   * @param requirements - The payment requirements\n   * @returns Promise resolving to settlement response\n   */\n  async settle(\n    payload: PaymentPayload,\n    requirements: PaymentRequirements,\n  ): Promise<SettleResponse> {\n    const payloadV1 = payload as unknown as PaymentPayloadV1;\n    const exactEvmPayload = payload.payload as ExactEvmPayloadV1;\n\n    // Re-verify before settling\n    const valid = await this.verify(payload, requirements);\n    if (!valid.isValid) {\n      return {\n        success: false,\n        network: payloadV1.network,\n        transaction: \"\",\n        errorReason: valid.invalidReason ?? \"invalid_scheme\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    try {\n      // Parse ERC-6492 signature if applicable\n      const parseResult = parseErc6492Signature(exactEvmPayload.signature!);\n      const { signature, address: factoryAddress, data: factoryCalldata } = parseResult;\n\n      // Deploy ERC-4337 smart wallet via EIP-6492 if configured and needed\n      if (\n        this.config.deployERC4337WithEIP6492 &&\n        factoryAddress &&\n        factoryCalldata &&\n        !isAddressEqual(factoryAddress, \"0x0000000000000000000000000000000000000000\")\n      ) {\n        // Check if smart wallet is already deployed\n        const payerAddress = exactEvmPayload.authorization.from;\n        const bytecode = await this.signer.getCode({ address: payerAddress });\n\n        if (!bytecode || bytecode === \"0x\") {\n          // Wallet not deployed - attempt deployment\n          try {\n            console.log(`Deploying ERC-4337 smart wallet for ${payerAddress} via EIP-6492`);\n\n            // Send the factory calldata directly as a transaction\n            // The factoryCalldata already contains the complete encoded function call\n            const deployTx = await this.signer.sendTransaction({\n              to: factoryAddress as Hex,\n              data: factoryCalldata as Hex,\n            });\n\n            // Wait for deployment transaction\n            await this.signer.waitForTransactionReceipt({ hash: deployTx });\n            console.log(`Successfully deployed smart wallet for ${payerAddress}`);\n          } catch (deployError) {\n            console.error(\"Smart wallet deployment failed:\", deployError);\n            // Deployment failed - cannot proceed\n            throw deployError;\n          }\n        } else {\n          console.log(`Smart wallet for ${payerAddress} already deployed, skipping deployment`);\n        }\n      }\n\n      // Determine if this is an ECDSA signature (EOA) or smart wallet signature\n      // ECDSA signatures are exactly 65 bytes (130 hex chars without 0x)\n      const signatureLength = signature.startsWith(\"0x\") ? signature.length - 2 : signature.length;\n      const isECDSA = signatureLength === 130;\n\n      let tx: Hex;\n      if (isECDSA) {\n        // For EOA wallets, parse signature into v, r, s and use that overload\n        const parsedSig = parseSignature(signature);\n\n        tx = await this.signer.writeContract({\n          address: getAddress(requirements.asset),\n          abi: eip3009ABI,\n          functionName: \"transferWithAuthorization\",\n          args: [\n            getAddress(exactEvmPayload.authorization.from),\n            getAddress(exactEvmPayload.authorization.to),\n            BigInt(exactEvmPayload.authorization.value),\n            BigInt(exactEvmPayload.authorization.validAfter),\n            BigInt(exactEvmPayload.authorization.validBefore),\n            exactEvmPayload.authorization.nonce,\n            (parsedSig.v as number | undefined) || parsedSig.yParity,\n            parsedSig.r,\n            parsedSig.s,\n          ],\n        });\n      } else {\n        // For smart wallets, use the bytes signature overload\n        // The signature contains WebAuthn/P256 or other ERC-1271 compatible signature data\n        tx = await this.signer.writeContract({\n          address: getAddress(requirements.asset),\n          abi: eip3009ABI,\n          functionName: \"transferWithAuthorization\",\n          args: [\n            getAddress(exactEvmPayload.authorization.from),\n            getAddress(exactEvmPayload.authorization.to),\n            BigInt(exactEvmPayload.authorization.value),\n            BigInt(exactEvmPayload.authorization.validAfter),\n            BigInt(exactEvmPayload.authorization.validBefore),\n            exactEvmPayload.authorization.nonce,\n            signature,\n          ],\n        });\n      }\n\n      // Wait for transaction confirmation\n      const receipt = await this.signer.waitForTransactionReceipt({ hash: tx });\n\n      if (receipt.status !== \"success\") {\n        return {\n          success: false,\n          errorReason: \"invalid_transaction_state\",\n          transaction: tx,\n          network: payloadV1.network,\n          payer: exactEvmPayload.authorization.from,\n        };\n      }\n\n      return {\n        success: true,\n        transaction: tx,\n        network: payloadV1.network,\n        payer: exactEvmPayload.authorization.from,\n      };\n    } catch (error) {\n      console.error(\"Failed to settle transaction:\", error);\n      return {\n        success: false,\n        errorReason: \"transaction_failed\",\n        transaction: \"\",\n        network: payloadV1.network,\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n  }\n}\n","// EIP-3009 TransferWithAuthorization types for EIP-712 signing\nexport const authorizationTypes = {\n  TransferWithAuthorization: [\n    { name: \"from\", type: \"address\" },\n    { name: \"to\", type: \"address\" },\n    { name: \"value\", type: \"uint256\" },\n    { name: \"validAfter\", type: \"uint256\" },\n    { name: \"validBefore\", type: \"uint256\" },\n    { name: \"nonce\", type: \"bytes32\" },\n  ],\n} as const;\n\n// EIP3009 ABI for transferWithAuthorization function\nexport const eip3009ABI = [\n  {\n    inputs: [\n      { name: \"from\", type: \"address\" },\n      { name: \"to\", type: \"address\" },\n      { name: \"value\", type: \"uint256\" },\n      { name: \"validAfter\", type: \"uint256\" },\n      { name: \"validBefore\", type: \"uint256\" },\n      { name: \"nonce\", type: \"bytes32\" },\n      { name: \"v\", type: \"uint8\" },\n      { name: \"r\", type: \"bytes32\" },\n      { name: \"s\", type: \"bytes32\" },\n    ],\n    name: \"transferWithAuthorization\",\n    outputs: [],\n    stateMutability: \"nonpayable\",\n    type: \"function\",\n  },\n  {\n    inputs: [\n      { name: \"from\", type: \"address\" },\n      { name: \"to\", type: \"address\" },\n      { name: \"value\", type: \"uint256\" },\n      { name: \"validAfter\", type: \"uint256\" },\n      { name: \"validBefore\", type: \"uint256\" },\n      { name: \"nonce\", type: \"bytes32\" },\n      { name: \"signature\", type: \"bytes\" },\n    ],\n    name: \"transferWithAuthorization\",\n    outputs: [],\n    stateMutability: \"nonpayable\",\n    type: \"function\",\n  },\n  {\n    inputs: [{ name: \"account\", type: \"address\" }],\n    name: \"balanceOf\",\n    outputs: [{ name: \"\", type: \"uint256\" }],\n    stateMutability: \"view\",\n    type: \"function\",\n  },\n  {\n    inputs: [],\n    name: \"version\",\n    outputs: [{ name: \"\", type: \"string\" }],\n    stateMutability: \"view\",\n    type: \"function\",\n  },\n] as const;\n","import { toHex } from \"viem\";\nimport { Network } from \"@x402/core/types\";\n\n/**\n * Extract chain ID from network string (e.g., \"base-sepolia\" -> 84532)\n * Used by v1 implementations\n *\n * @param network - The network identifier\n * @returns The numeric chain ID\n */\nexport function getEvmChainId(network: Network): number {\n  const networkMap: Record<string, number> = {\n    base: 8453,\n    \"base-sepolia\": 84532,\n    ethereum: 1,\n    sepolia: 11155111,\n    polygon: 137,\n    \"polygon-amoy\": 80002,\n  };\n  return networkMap[network] || 1;\n}\n\n/**\n * Create a random 32-byte nonce for authorization\n *\n * @returns A hex-encoded 32-byte nonce\n */\nexport function createNonce(): `0x${string}` {\n  // Use dynamic import to avoid require() in ESM context\n  const cryptoObj =\n    typeof globalThis.crypto !== \"undefined\"\n      ? globalThis.crypto\n      : (globalThis as { crypto?: Crypto }).crypto;\n\n  if (!cryptoObj) {\n    throw new Error(\"Crypto API not available\");\n  }\n\n  return toHex(cryptoObj.getRandomValues(new 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Check if it's EIP-6492 with deployment info.\n          // EIP-6492 signatures contain factory address and calldata needed for deployment.\n          // Non-EIP-6492 undeployed wallets cannot succeed (no way to deploy them).\n          const erc6492Data = parseErc6492Signature(signature);\n          const hasDeploymentInfo =\n            erc6492Data.address &&\n            erc6492Data.data &&\n            !isAddressEqual(erc6492Data.address, \"0x0000000000000000000000000000000000000000\");\n\n          if (!hasDeploymentInfo) {\n            // Non-EIP-6492 undeployed smart wallet - will always fail at settlement\n            // since EIP-3009 requires on-chain EIP-1271 validation\n            return {\n              isValid: false,\n              invalidReason: \"invalid_exact_evm_payload_undeployed_smart_wallet\",\n              payer: payerAddress,\n            };\n          }\n          // EIP-6492 signature with deployment info - allow through\n          // Facilitators with sponsored deployment support can handle this in settle()\n        } else {\n          // Wallet is deployed but signature still failed - invalid signature\n          return {\n            isValid: false,\n            invalidReason: \"invalid_exact_evm_payload_signature\",\n            payer: exactEvmPayload.authorization.from,\n          };\n        }\n      } else {\n        // EOA signature failed\n        return {\n          isValid: false,\n          invalidReason: \"invalid_exact_evm_payload_signature\",\n          payer: exactEvmPayload.authorization.from,\n        };\n      }\n    }\n\n    // Verify payment recipient matches\n    if (getAddress(exactEvmPayload.authorization.to) !== getAddress(requirements.payTo)) {\n      return {\n        isValid: false,\n        invalidReason: \"invalid_exact_evm_payload_recipient_mismatch\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Verify validBefore is in the future (with 6 second buffer for block time)\n    const now = Math.floor(Date.now() / 1000);\n    if (BigInt(exactEvmPayload.authorization.validBefore) < BigInt(now + 6)) {\n      return {\n        isValid: false,\n        invalidReason: \"invalid_exact_evm_payload_authorization_valid_before\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Verify validAfter is not in the future\n    if (BigInt(exactEvmPayload.authorization.validAfter) > BigInt(now)) {\n      return {\n        isValid: false,\n        invalidReason: \"invalid_exact_evm_payload_authorization_valid_after\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Check balance\n    try {\n      const balance = (await this.signer.readContract({\n        address: erc20Address,\n        abi: eip3009ABI,\n        functionName: \"balanceOf\",\n        args: [exactEvmPayload.authorization.from],\n      })) as bigint;\n\n      if (BigInt(balance) < BigInt(requirementsV1.maxAmountRequired)) {\n        return {\n          isValid: false,\n          invalidReason: \"insufficient_funds\",\n          invalidMessage: `Insufficient funds to complete the payment. Required: ${requirementsV1.maxAmountRequired} ${requirements.asset}, Available: ${balance.toString()} ${requirements.asset}. Please add funds to your wallet and try again.`,\n          payer: exactEvmPayload.authorization.from,\n        };\n      }\n    } catch {\n      // If we can't check balance, continue with other validations\n    }\n\n    // Verify amount is sufficient\n    if (BigInt(exactEvmPayload.authorization.value) < BigInt(requirementsV1.maxAmountRequired)) {\n      return {\n        isValid: false,\n        invalidReason: \"invalid_exact_evm_payload_authorization_value\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    return {\n      isValid: true,\n      invalidReason: undefined,\n      payer: exactEvmPayload.authorization.from,\n    };\n  }\n\n  /**\n   * Settles a payment by executing the transfer (V1).\n   *\n   * @param payload - The payment payload to settle\n   * @param requirements - The payment requirements\n   * @returns Promise resolving to settlement response\n   */\n  async settle(\n    payload: PaymentPayload,\n    requirements: PaymentRequirements,\n  ): Promise<SettleResponse> {\n    const payloadV1 = payload as unknown as PaymentPayloadV1;\n    const exactEvmPayload = payload.payload as ExactEvmPayloadV1;\n\n    // Re-verify before settling\n    const valid = await this.verify(payload, requirements);\n    if (!valid.isValid) {\n      return {\n        success: false,\n        network: payloadV1.network,\n        transaction: \"\",\n        errorReason: valid.invalidReason ?? \"invalid_scheme\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    try {\n      // Parse ERC-6492 signature if applicable\n      const parseResult = parseErc6492Signature(exactEvmPayload.signature!);\n      const { signature, address: factoryAddress, data: factoryCalldata } = parseResult;\n\n      // Deploy ERC-4337 smart wallet via EIP-6492 if configured and needed\n      if (\n        this.config.deployERC4337WithEIP6492 &&\n        factoryAddress &&\n        factoryCalldata &&\n        !isAddressEqual(factoryAddress, \"0x0000000000000000000000000000000000000000\")\n      ) {\n        // Check if smart wallet is already deployed\n        const payerAddress = exactEvmPayload.authorization.from;\n        const bytecode = await this.signer.getCode({ address: payerAddress });\n\n        if (!bytecode || bytecode === \"0x\") {\n          // Wallet not deployed - attempt deployment\n          try {\n            console.log(`Deploying ERC-4337 smart wallet for ${payerAddress} via EIP-6492`);\n\n            // Send the factory calldata directly as a transaction\n            // The factoryCalldata already contains the complete encoded function call\n            const deployTx = await this.signer.sendTransaction({\n              to: factoryAddress as Hex,\n              data: factoryCalldata as Hex,\n            });\n\n            // Wait for deployment transaction\n            await this.signer.waitForTransactionReceipt({ hash: deployTx });\n            console.log(`Successfully deployed smart wallet for ${payerAddress}`);\n          } catch (deployError) {\n            console.error(\"Smart wallet deployment failed:\", deployError);\n            // Deployment failed - cannot proceed\n            throw deployError;\n          }\n        } else {\n          console.log(`Smart wallet for ${payerAddress} already deployed, skipping deployment`);\n        }\n      }\n\n      // Determine if this is an ECDSA signature (EOA) or smart wallet signature\n      // ECDSA signatures are exactly 65 bytes (130 hex chars without 0x)\n      const signatureLength = signature.startsWith(\"0x\") ? signature.length - 2 : signature.length;\n      const isECDSA = signatureLength === 130;\n\n      let tx: Hex;\n      if (isECDSA) {\n        // For EOA wallets, parse signature into v, r, s and use that overload\n        const parsedSig = parseSignature(signature);\n\n        tx = await this.signer.writeContract({\n          address: getAddress(requirements.asset),\n          abi: eip3009ABI,\n          functionName: \"transferWithAuthorization\",\n          args: [\n            getAddress(exactEvmPayload.authorization.from),\n            getAddress(exactEvmPayload.authorization.to),\n            BigInt(exactEvmPayload.authorization.value),\n            BigInt(exactEvmPayload.authorization.validAfter),\n            BigInt(exactEvmPayload.authorization.validBefore),\n            exactEvmPayload.authorization.nonce,\n            (parsedSig.v as number | undefined) || parsedSig.yParity,\n            parsedSig.r,\n            parsedSig.s,\n          ],\n        });\n      } else {\n        // For smart wallets, use the bytes signature overload\n        // The signature contains WebAuthn/P256 or other ERC-1271 compatible signature data\n        tx = await this.signer.writeContract({\n          address: getAddress(requirements.asset),\n          abi: eip3009ABI,\n          functionName: \"transferWithAuthorization\",\n          args: [\n            getAddress(exactEvmPayload.authorization.from),\n            getAddress(exactEvmPayload.authorization.to),\n            BigInt(exactEvmPayload.authorization.value),\n            BigInt(exactEvmPayload.authorization.validAfter),\n            BigInt(exactEvmPayload.authorization.validBefore),\n            exactEvmPayload.authorization.nonce,\n            signature,\n          ],\n        });\n      }\n\n      // Wait for transaction confirmation\n      const receipt = await this.signer.waitForTransactionReceipt({ hash: tx });\n\n      if (receipt.status !== \"success\") {\n        return {\n          success: false,\n          errorReason: \"invalid_transaction_state\",\n          transaction: tx,\n          network: payloadV1.network,\n          payer: exactEvmPayload.authorization.from,\n        };\n      }\n\n      return {\n        success: true,\n        transaction: tx,\n        network: payloadV1.network,\n        payer: exactEvmPayload.authorization.from,\n      };\n    } catch (error) {\n      console.error(\"Failed to settle transaction:\", error);\n      return {\n        success: false,\n        errorReason: \"transaction_failed\",\n        transaction: \"\",\n        network: payloadV1.network,\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n  }\n}\n","// EIP-3009 TransferWithAuthorization types for EIP-712 signing\nexport const authorizationTypes = {\n  TransferWithAuthorization: [\n    { name: \"from\", type: \"address\" },\n    { name: \"to\", type: \"address\" },\n    { name: \"value\", type: \"uint256\" },\n    { name: \"validAfter\", type: \"uint256\" },\n    { name: \"validBefore\", type: \"uint256\" },\n    { name: \"nonce\", type: \"bytes32\" },\n  ],\n} as const;\n\n/**\n * Permit2 EIP-712 types for signing PermitWitnessTransferFrom.\n * Must match the exact format expected by the Permit2 contract.\n * Note: Types must be in ALPHABETICAL order after the primary type (TokenPermissions < Witness).\n */\nexport const permit2WitnessTypes = {\n  PermitWitnessTransferFrom: [\n    { name: \"permitted\", type: \"TokenPermissions\" },\n    { name: \"spender\", type: \"address\" },\n    { name: \"nonce\", type: \"uint256\" },\n    { name: \"deadline\", type: \"uint256\" },\n    { name: \"witness\", type: \"Witness\" },\n  ],\n  TokenPermissions: [\n    { name: \"token\", type: \"address\" },\n    { name: \"amount\", type: \"uint256\" },\n  ],\n  Witness: [\n    { name: \"to\", type: \"address\" },\n    { name: \"validAfter\", type: \"uint256\" },\n    { name: \"extra\", type: \"bytes\" },\n  ],\n} as const;\n\n// EIP3009 ABI for transferWithAuthorization function\nexport const eip3009ABI = [\n  {\n    inputs: [\n      { name: \"from\", type: \"address\" },\n      { name: \"to\", type: \"address\" },\n      { name: \"value\", type: \"uint256\" },\n      { name: \"validAfter\", type: \"uint256\" },\n      { name: \"validBefore\", type: \"uint256\" },\n      { name: \"nonce\", type: \"bytes32\" },\n      { name: \"v\", type: \"uint8\" },\n      { name: \"r\", type: \"bytes32\" },\n      { name: \"s\", type: \"bytes32\" },\n    ],\n    name: \"transferWithAuthorization\",\n    outputs: [],\n    stateMutability: \"nonpayable\",\n    type: \"function\",\n  },\n  {\n    inputs: [\n      { name: \"from\", type: \"address\" },\n      { name: \"to\", type: \"address\" },\n      { name: \"value\", type: \"uint256\" },\n      { name: \"validAfter\", type: \"uint256\" },\n      { name: \"validBefore\", type: \"uint256\" },\n      { name: \"nonce\", type: \"bytes32\" },\n      { name: \"signature\", type: \"bytes\" },\n    ],\n    name: \"transferWithAuthorization\",\n    outputs: [],\n    stateMutability: \"nonpayable\",\n    type: \"function\",\n  },\n  {\n    inputs: [{ name: \"account\", type: \"address\" }],\n    name: \"balanceOf\",\n    outputs: [{ name: \"\", type: \"uint256\" }],\n    stateMutability: \"view\",\n    type: \"function\",\n  },\n  {\n    inputs: [],\n    name: \"version\",\n    outputs: [{ name: \"\", type: \"string\" }],\n    stateMutability: \"view\",\n    type: \"function\",\n  },\n] as const;\n\n/**\n * Canonical Permit2 contract address.\n * Same address on all EVM chains via CREATE2 deployment.\n *\n * @see https://github.com/Uniswap/permit2\n */\nexport const PERMIT2_ADDRESS = \"0x000000000022D473030F116dDEE9F6B43aC78BA3\" as const;\n\n/**\n * x402ExactPermit2Proxy contract address.\n * Vanity address: 0x4020...0001 for easy recognition.\n * This address is deterministic based on:\n * - Arachnid's deterministic deployer (0x4e59b44847b379578588920cA78FbF26c0B4956C)\n * - Vanity-mined salt for prefix 0x4020 and suffix 0001\n * - Contract bytecode + constructor args (PERMIT2_ADDRESS)\n */\nexport const x402ExactPermit2ProxyAddress = \"0x4020615294c913F045dc10f0a5cdEbd86c280001\" as const;\n\n/**\n * x402UptoPermit2Proxy contract address.\n * Vanity address: 0x4020...0002 for easy recognition.\n * This address is deterministic based on:\n * - Arachnid's deterministic deployer (0x4e59b44847b379578588920cA78FbF26c0B4956C)\n * - Vanity-mined salt for prefix 0x4020 and suffix 0002\n * - Contract bytecode + constructor args (PERMIT2_ADDRESS)\n */\nexport const x402UptoPermit2ProxyAddress = \"0x4020633461b2895a48930Ff97eE8fCdE8E520002\" as const;\n\n/**\n * x402UptoPermit2Proxy ABI - settle function for upto payment scheme (variable amounts).\n */\nexport const x402UptoPermit2ProxyABI = [\n  {\n    type: \"function\",\n    name: \"PERMIT2\",\n    inputs: [],\n    outputs: [{ name: \"\", type: \"address\", internalType: \"contract ISignatureTransfer\" }],\n    stateMutability: \"view\",\n  },\n  {\n    type: \"function\",\n    name: \"WITNESS_TYPEHASH\",\n    inputs: [],\n    outputs: [{ name: \"\", type: \"bytes32\", internalType: \"bytes32\" }],\n    stateMutability: \"view\",\n  },\n  {\n    type: \"function\",\n    name: \"WITNESS_TYPE_STRING\",\n    inputs: [],\n    outputs: [{ name: \"\", type: \"string\", internalType: \"string\" }],\n    stateMutability: \"view\",\n  },\n  {\n    type: \"function\",\n    name: \"initialize\",\n    inputs: [{ name: \"_permit2\", type: \"address\", internalType: \"address\" }],\n    outputs: [],\n    stateMutability: \"nonpayable\",\n  },\n  {\n    type: \"function\",\n    name: \"settle\",\n    inputs: [\n      {\n        name: \"permit\",\n        type: \"tuple\",\n        internalType: \"struct ISignatureTransfer.PermitTransferFrom\",\n        components: [\n          {\n            name: \"permitted\",\n            type: \"tuple\",\n            internalType: \"struct ISignatureTransfer.TokenPermissions\",\n            components: [\n              { name: \"token\", type: \"address\", internalType: \"address\" },\n              { name: \"amount\", type: \"uint256\", internalType: \"uint256\" },\n            ],\n          },\n          { name: \"nonce\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"deadline\", type: \"uint256\", internalType: \"uint256\" },\n        ],\n      },\n      { name: \"owner\", type: \"address\", internalType: \"address\" },\n      {\n        name: \"witness\",\n        type: \"tuple\",\n        internalType: \"struct x402BasePermit2Proxy.Witness\",\n        components: [\n          { name: \"to\", type: \"address\", internalType: \"address\" },\n          { name: \"validAfter\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"extra\", type: \"bytes\", internalType: \"bytes\" },\n        ],\n      },\n      { name: \"signature\", type: \"bytes\", internalType: \"bytes\" },\n    ],\n    outputs: [],\n    stateMutability: \"nonpayable\",\n  },\n  {\n    type: \"function\",\n    name: \"settleWithPermit\",\n    inputs: [\n      {\n        name: \"permit2612\",\n        type: \"tuple\",\n        internalType: \"struct x402BasePermit2Proxy.EIP2612Permit\",\n        components: [\n          { name: \"value\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"deadline\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"r\", type: \"bytes32\", internalType: \"bytes32\" },\n          { name: \"s\", type: \"bytes32\", internalType: \"bytes32\" },\n          { name: \"v\", type: \"uint8\", internalType: \"uint8\" },\n        ],\n      },\n      {\n        name: \"permit\",\n        type: \"tuple\",\n        internalType: \"struct ISignatureTransfer.PermitTransferFrom\",\n        components: [\n          {\n            name: \"permitted\",\n            type: \"tuple\",\n            internalType: \"struct ISignatureTransfer.TokenPermissions\",\n            components: [\n              { name: \"token\", type: \"address\", internalType: \"address\" },\n              { name: \"amount\", type: \"uint256\", internalType: \"uint256\" },\n            ],\n          },\n          { name: \"nonce\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"deadline\", type: \"uint256\", internalType: \"uint256\" },\n        ],\n      },\n      { name: \"owner\", type: \"address\", internalType: \"address\" },\n      {\n        name: \"witness\",\n        type: \"tuple\",\n        internalType: \"struct x402BasePermit2Proxy.Witness\",\n        components: [\n          { name: \"to\", type: \"address\", internalType: \"address\" },\n          { name: \"validAfter\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"extra\", type: \"bytes\", internalType: \"bytes\" },\n        ],\n      },\n      { name: \"signature\", type: \"bytes\", internalType: \"bytes\" },\n    ],\n    outputs: [],\n    stateMutability: \"nonpayable\",\n  },\n  { type: \"event\", name: \"Settled\", inputs: [], anonymous: false },\n  { type: \"event\", name: \"SettledWithPermit\", inputs: [], anonymous: false },\n  { type: \"error\", name: \"AlreadyInitialized\", inputs: [] },\n  { type: \"error\", name: \"AmountExceedsPermitted\", inputs: [] },\n  { type: \"error\", name: \"InvalidDestination\", inputs: [] },\n  { type: \"error\", name: \"InvalidOwner\", inputs: [] },\n  { type: \"error\", name: \"InvalidPermit2Address\", inputs: [] },\n  { type: \"error\", name: \"PaymentTooEarly\", inputs: [] },\n  { type: \"error\", name: \"ReentrancyGuardReentrantCall\", inputs: [] },\n] as const;\n\n/**\n * x402ExactPermit2Proxy ABI - settle function for exact payment scheme.\n */\nexport const x402ExactPermit2ProxyABI = [\n  {\n    type: \"function\",\n    name: \"PERMIT2\",\n    inputs: [],\n    outputs: [{ name: \"\", type: \"address\", internalType: \"contract ISignatureTransfer\" }],\n    stateMutability: \"view\",\n  },\n  {\n    type: \"function\",\n    name: \"WITNESS_TYPEHASH\",\n    inputs: [],\n    outputs: [{ name: \"\", type: \"bytes32\", internalType: \"bytes32\" }],\n    stateMutability: \"view\",\n  },\n  {\n    type: \"function\",\n    name: \"WITNESS_TYPE_STRING\",\n    inputs: [],\n    outputs: [{ name: \"\", type: \"string\", internalType: \"string\" }],\n    stateMutability: \"view\",\n  },\n  {\n    type: \"function\",\n    name: \"initialize\",\n    inputs: [{ name: \"_permit2\", type: \"address\", internalType: \"address\" }],\n    outputs: [],\n    stateMutability: \"nonpayable\",\n  },\n  {\n    type: \"function\",\n    name: \"settle\",\n    inputs: [\n      {\n        name: \"permit\",\n        type: \"tuple\",\n        internalType: \"struct ISignatureTransfer.PermitTransferFrom\",\n        components: [\n          {\n            name: \"permitted\",\n            type: \"tuple\",\n            internalType: \"struct ISignatureTransfer.TokenPermissions\",\n            components: [\n              { name: \"token\", type: \"address\", internalType: \"address\" },\n              { name: \"amount\", type: \"uint256\", internalType: \"uint256\" },\n            ],\n          },\n          { name: \"nonce\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"deadline\", type: \"uint256\", internalType: \"uint256\" },\n        ],\n      },\n      { name: \"owner\", type: \"address\", internalType: \"address\" },\n      {\n        name: \"witness\",\n        type: \"tuple\",\n        internalType: \"struct x402BasePermit2Proxy.Witness\",\n        components: [\n          { name: \"to\", type: \"address\", internalType: \"address\" },\n          { name: \"validAfter\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"extra\", type: \"bytes\", internalType: \"bytes\" },\n        ],\n      },\n      { name: \"signature\", type: \"bytes\", internalType: \"bytes\" },\n    ],\n    outputs: [],\n    stateMutability: \"nonpayable\",\n  },\n  {\n    type: \"function\",\n    name: \"settleWithPermit\",\n    inputs: [\n      {\n        name: \"permit2612\",\n        type: \"tuple\",\n        internalType: \"struct x402BasePermit2Proxy.EIP2612Permit\",\n        components: [\n          { name: \"value\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"deadline\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"r\", type: \"bytes32\", internalType: \"bytes32\" },\n          { name: \"s\", type: \"bytes32\", internalType: \"bytes32\" },\n          { name: \"v\", type: \"uint8\", internalType: \"uint8\" },\n        ],\n      },\n      {\n        name: \"permit\",\n        type: \"tuple\",\n        internalType: \"struct ISignatureTransfer.PermitTransferFrom\",\n        components: [\n          {\n            name: \"permitted\",\n            type: \"tuple\",\n            internalType: \"struct ISignatureTransfer.TokenPermissions\",\n            components: [\n              { name: \"token\", type: \"address\", internalType: \"address\" },\n              { name: \"amount\", type: \"uint256\", internalType: \"uint256\" },\n            ],\n          },\n          { name: \"nonce\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"deadline\", type: \"uint256\", internalType: \"uint256\" },\n        ],\n      },\n      { name: \"owner\", type: \"address\", internalType: \"address\" },\n      {\n        name: \"witness\",\n        type: \"tuple\",\n        internalType: \"struct x402BasePermit2Proxy.Witness\",\n        components: [\n          { name: \"to\", type: \"address\", internalType: \"address\" },\n          { name: \"validAfter\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"extra\", type: \"bytes\", internalType: \"bytes\" },\n        ],\n      },\n      { name: \"signature\", type: \"bytes\", internalType: \"bytes\" },\n    ],\n    outputs: [],\n    stateMutability: \"nonpayable\",\n  },\n  { type: \"event\", name: \"Settled\", inputs: [], anonymous: false },\n  { type: \"event\", name: \"SettledWithPermit\", inputs: [], anonymous: false },\n  { type: \"error\", name: \"AlreadyInitialized\", inputs: [] },\n  { type: \"error\", name: \"InvalidDestination\", inputs: [] },\n  { type: \"error\", name: \"InvalidOwner\", inputs: [] },\n  { type: \"error\", name: \"InvalidPermit2Address\", inputs: [] },\n  { type: \"error\", name: \"PaymentTooEarly\", inputs: [] },\n  { type: \"error\", name: \"ReentrancyGuardReentrantCall\", inputs: [] },\n] as const;\n","import { toHex } from \"viem\";\nimport { EVM_NETWORK_CHAIN_ID_MAP, EvmNetworkV1 } from \"./v1\";\n\n/**\n * Extract chain ID from network string (e.g., \"base-sepolia\" -> 84532)\n * Used by v1 implementations\n *\n * @param network - The network identifier\n * @returns The numeric chain ID\n * @throws Error if the network is not supported\n */\nexport function getEvmChainId(network: EvmNetworkV1): number {\n  const chainId = EVM_NETWORK_CHAIN_ID_MAP[network];\n  if (!chainId) {\n    throw new Error(`Unsupported network: ${network}`);\n  }\n  return chainId;\n}\n\n/**\n * Get the crypto object from the global scope.\n *\n * @returns The crypto object\n * @throws Error if crypto API is not available\n */\nfunction getCrypto(): Crypto {\n  const cryptoObj = globalThis.crypto as Crypto | undefined;\n  if (!cryptoObj) {\n    throw new Error(\"Crypto API not available\");\n  }\n  return cryptoObj;\n}\n\n/**\n * Create a random 32-byte nonce for EIP-3009 authorization.\n *\n * @returns A hex-encoded 32-byte nonce\n */\nexport function createNonce(): `0x${string}` {\n  return toHex(getCrypto().getRandomValues(new Uint8Array(32)));\n}\n\n/**\n * Creates a random 256-bit nonce for Permit2.\n * Permit2 uses uint256 nonces (not bytes32 like EIP-3009).\n *\n * @returns A string representation of the random nonce\n */\nexport function createPermit2Nonce(): string {\n  const randomBytes = getCrypto().getRandomValues(new Uint8Array(32));\n  return BigInt(toHex(randomBytes)).toString();\n}\n","import {\n  Network,\n  PaymentPayload,\n  PaymentRequirements,\n  SchemeNetworkClient,\n} from \"@x402/core/types\";\nimport { PaymentRequirementsV1 } from \"@x402/core/types/v1\";\nimport { getAddress } from \"viem\";\nimport { authorizationTypes } from \"../../../constants\";\nimport { ClientEvmSigner } from \"../../../signer\";\nimport { ExactEvmPayloadV1 } from \"../../../types\";\nimport { createNonce, getEvmChainId } from \"../../../utils\";\nimport { EvmNetworkV1 } from \"../../../v1\";\n\n/**\n * EVM client implementation for the Exact payment scheme (V1).\n */\nexport class ExactEvmSchemeV1 implements SchemeNetworkClient {\n  readonly scheme = \"exact\";\n\n  /**\n   * Creates a new ExactEvmClientV1 instance.\n   *\n   * @param signer - The EVM signer for client operations\n   */\n  constructor(private readonly signer: ClientEvmSigner) {}\n\n  /**\n   * Creates a payment payload for the Exact scheme (V1).\n   *\n   * @param x402Version - The x402 protocol version\n   * @param paymentRequirements - The payment requirements\n   * @returns Promise resolving to a payment payload\n   */\n  async createPaymentPayload(\n    x402Version: number,\n    paymentRequirements: PaymentRequirements,\n  ): Promise<\n    Pick<PaymentPayload, \"x402Version\" | \"payload\"> & { scheme: string; network: Network }\n  > {\n    const selectedV1 = paymentRequirements as unknown as PaymentRequirementsV1;\n    const nonce = createNonce();\n    const now = Math.floor(Date.now() / 1000);\n\n    const authorization: ExactEvmPayloadV1[\"authorization\"] = {\n      from: this.signer.address,\n      to: getAddress(selectedV1.payTo),\n      value: selectedV1.maxAmountRequired,\n      validAfter: (now - 600).toString(), // 10 minutes before\n      validBefore: (now + selectedV1.maxTimeoutSeconds).toString(),\n      nonce,\n    };\n\n    // Sign the authorization\n    const signature = await this.signAuthorization(authorization, selectedV1);\n\n    const payload: ExactEvmPayloadV1 = {\n      authorization,\n      signature,\n    };\n\n    return {\n      x402Version,\n      scheme: selectedV1.scheme,\n      network: selectedV1.network,\n      payload,\n    };\n  }\n\n  /**\n   * Sign the EIP-3009 authorization using EIP-712\n   *\n   * @param authorization - The authorization to sign\n   * @param requirements - The payment requirements\n   * @returns Promise resolving to the signature\n   */\n  private async signAuthorization(\n    authorization: ExactEvmPayloadV1[\"authorization\"],\n    requirements: PaymentRequirementsV1,\n  ): Promise<`0x${string}`> {\n    const chainId = getEvmChainId(requirements.network as EvmNetworkV1);\n\n    if (!requirements.extra?.name || !requirements.extra?.version) {\n      throw new Error(\n        `EIP-712 domain parameters (name, version) are required in payment requirements for asset ${requirements.asset}`,\n      );\n    }\n\n    const { name, version } = requirements.extra;\n\n    const domain = {\n      name,\n      version,\n      chainId,\n      verifyingContract: getAddress(requirements.asset),\n    };\n\n    const message = {\n      from: getAddress(authorization.from),\n      to: getAddress(authorization.to),\n      value: BigInt(authorization.value),\n      validAfter: BigInt(authorization.validAfter),\n      validBefore: BigInt(authorization.validBefore),\n      nonce: authorization.nonce,\n    };\n\n    return await this.signer.signTypedData({\n      domain,\n      types: authorizationTypes,\n      primaryType: \"TransferWithAuthorization\",\n      message,\n    });\n  }\n}\n","export { ExactEvmSchemeV1 } from \"../exact/v1\";\n\nexport const EVM_NETWORK_CHAIN_ID_MAP = {\n  ethereum: 1,\n  sepolia: 11155111,\n  abstract: 2741,\n  \"abstract-testnet\": 11124,\n  \"base-sepolia\": 84532,\n  base: 8453,\n  \"avalanche-fuji\": 43113,\n  avalanche: 43114,\n  iotex: 4689,\n  sei: 1329,\n  \"sei-testnet\": 1328,\n  polygon: 137,\n  \"polygon-amoy\": 80002,\n  peaq: 3338,\n  story: 1514,\n  educhain: 41923,\n  \"skale-base-sepolia\": 324705682,\n} as const;\n\nexport type EvmNetworkV1 = keyof typeof EVM_NETWORK_CHAIN_ID_MAP;\n\nexport const NETWORKS: string[] = 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dist/cjs/index.d.ts

@@ -1,36 +0,463 @@
-import { SchemeNetworkClient, PaymentRequirements, PaymentPayload } from '@x402/core/types';
-import { C as ClientEvmSigner } from './signer-5OVDxViv.js';
-export { F as FacilitatorEvmSigner, t as toClientEvmSigner, a as toFacilitatorEvmSigner } from './signer-5OVDxViv.js';
+export { E as ExactEvmScheme, P as Permit2AllowanceParams, c as createPermit2ApprovalTx, e as erc20AllowanceAbi, g as getPermit2AllowanceReadParams } from './permit2-BYv82va2.js';
+export { C as ClientEvmSigner, F as FacilitatorEvmSigner, t as toClientEvmSigner, a as toFacilitatorEvmSigner } from './signer-5OVDxViv.js';
+import '@x402/core/types';
 
 /**
- * EVM client implementation for the Exact payment scheme.
+ * Asset transfer methods for the exact EVM scheme.
+ * - eip3009: Uses transferWithAuthorization (USDC, etc.) - recommended for compatible tokens
+ * - permit2: Uses Permit2 + x402Permit2Proxy - universal fallback for any ERC-20
+ */
+type AssetTransferMethod = "eip3009" | "permit2";
+/**
+ * EIP-3009 payload for tokens with native transferWithAuthorization support.
+ */
+type ExactEIP3009Payload = {
+    signature?: `0x${string}`;
+    authorization: {
+        from: `0x${string}`;
+        to: `0x${string}`;
+        value: string;
+        validAfter: string;
+        validBefore: string;
+        nonce: `0x${string}`;
+    };
+};
+/**
+ * Permit2 witness data structure.
+ * Matches the Witness struct in x402Permit2Proxy contract.
+ * Note: Upper time bound is enforced by Permit2's `deadline` field, not a witness field.
+ */
+type Permit2Witness = {
+    to: `0x${string}`;
+    validAfter: string;
+    extra: `0x${string}`;
+};
+/**
+ * Permit2 authorization parameters.
+ * Used to reconstruct the signed message for verification.
+ */
+type Permit2Authorization = {
+    permitted: {
+        token: `0x${string}`;
+        amount: string;
+    };
+    spender: `0x${string}`;
+    nonce: string;
+    deadline: string;
+    witness: Permit2Witness;
+};
+/**
+ * Permit2 payload for tokens using the Permit2 + x402Permit2Proxy flow.
+ */
+type ExactPermit2Payload = {
+    signature: `0x${string}`;
+    permit2Authorization: Permit2Authorization & {
+        from: `0x${string}`;
+    };
+};
+type ExactEvmPayloadV1 = ExactEIP3009Payload;
+type ExactEvmPayloadV2 = ExactEIP3009Payload | ExactPermit2Payload;
+/**
+ * Type guard to check if a payload is a Permit2 payload.
+ * Permit2 payloads have a `permit2Authorization` field.
  *
+ * @param payload - The payload to check.
+ * @returns True if the payload is a Permit2 payload, false otherwise.
  */
-declare class ExactEvmScheme implements SchemeNetworkClient {
-    private readonly signer;
-    readonly scheme = "exact";
-    /**
-     * Creates a new ExactEvmClient instance.
-     *
-     * @param signer - The EVM signer for client operations
-     */
-    constructor(signer: ClientEvmSigner);
-    /**
-     * Creates a payment payload for the Exact scheme.
-     *
-     * @param x402Version - The x402 protocol version
-     * @param paymentRequirements - The payment requirements
-     * @returns Promise resolving to a payment payload
-     */
-    createPaymentPayload(x402Version: number, paymentRequirements: PaymentRequirements): Promise<Pick<PaymentPayload, "x402Version" | "payload">>;
-    /**
-     * Sign the EIP-3009 authorization using EIP-712
-     *
-     * @param authorization - The authorization to sign
-     * @param requirements - The payment requirements
-     * @returns Promise resolving to the signature
-     */
-    private signAuthorization;
-}
+declare function isPermit2Payload(payload: ExactEvmPayloadV2): payload is ExactPermit2Payload;
+/**
+ * Type guard to check if a payload is an EIP-3009 payload.
+ * EIP-3009 payloads have an `authorization` field.
+ *
+ * @param payload - The payload to check.
+ * @returns True if the payload is an EIP-3009 payload, false otherwise.
+ */
+declare function isEIP3009Payload(payload: ExactEvmPayloadV2): payload is ExactEIP3009Payload;
 
-export { ClientEvmSigner, ExactEvmScheme };
+declare const authorizationTypes: {
+    readonly TransferWithAuthorization: readonly [{
+        readonly name: "from";
+        readonly type: "address";
+    }, {
+        readonly name: "to";
+        readonly type: "address";
+    }, {
+        readonly name: "value";
+        readonly type: "uint256";
+    }, {
+        readonly name: "validAfter";
+        readonly type: "uint256";
+    }, {
+        readonly name: "validBefore";
+        readonly type: "uint256";
+    }, {
+        readonly name: "nonce";
+        readonly type: "bytes32";
+    }];
+};
+/**
+ * Permit2 EIP-712 types for signing PermitWitnessTransferFrom.
+ * Must match the exact format expected by the Permit2 contract.
+ * Note: Types must be in ALPHABETICAL order after the primary type (TokenPermissions < Witness).
+ */
+declare const permit2WitnessTypes: {
+    readonly PermitWitnessTransferFrom: readonly [{
+        readonly name: "permitted";
+        readonly type: "TokenPermissions";
+    }, {
+        readonly name: "spender";
+        readonly type: "address";
+    }, {
+        readonly name: "nonce";
+        readonly type: "uint256";
+    }, {
+        readonly name: "deadline";
+        readonly type: "uint256";
+    }, {
+        readonly name: "witness";
+        readonly type: "Witness";
+    }];
+    readonly TokenPermissions: readonly [{
+        readonly name: "token";
+        readonly type: "address";
+    }, {
+        readonly name: "amount";
+        readonly type: "uint256";
+    }];
+    readonly Witness: readonly [{
+        readonly name: "to";
+        readonly type: "address";
+    }, {
+        readonly name: "validAfter";
+        readonly type: "uint256";
+    }, {
+        readonly name: "extra";
+        readonly type: "bytes";
+    }];
+};
+declare const eip3009ABI: readonly [{
+    readonly inputs: readonly [{
+        readonly name: "from";
+        readonly type: "address";
+    }, {
+        readonly name: "to";
+        readonly type: "address";
+    }, {
+        readonly name: "value";
+        readonly type: "uint256";
+    }, {
+        readonly name: "validAfter";
+        readonly type: "uint256";
+    }, {
+        readonly name: "validBefore";
+        readonly type: "uint256";
+    }, {
+        readonly name: "nonce";
+        readonly type: "bytes32";
+    }, {
+        readonly name: "v";
+        readonly type: "uint8";
+    }, {
+        readonly name: "r";
+        readonly type: "bytes32";
+    }, {
+        readonly name: "s";
+        readonly type: "bytes32";
+    }];
+    readonly name: "transferWithAuthorization";
+    readonly outputs: readonly [];
+    readonly stateMutability: "nonpayable";
+    readonly type: "function";
+}, {
+    readonly inputs: readonly [{
+        readonly name: "from";
+        readonly type: "address";
+    }, {
+        readonly name: "to";
+        readonly type: "address";
+    }, {
+        readonly name: "value";
+        readonly type: "uint256";
+    }, {
+        readonly name: "validAfter";
+        readonly type: "uint256";
+    }, {
+        readonly name: "validBefore";
+        readonly type: "uint256";
+    }, {
+        readonly name: "nonce";
+        readonly type: "bytes32";
+    }, {
+        readonly name: "signature";
+        readonly type: "bytes";
+    }];
+    readonly name: "transferWithAuthorization";
+    readonly outputs: readonly [];
+    readonly stateMutability: "nonpayable";
+    readonly type: "function";
+}, {
+    readonly inputs: readonly [{
+        readonly name: "account";
+        readonly type: "address";
+    }];
+    readonly name: "balanceOf";
+    readonly outputs: readonly [{
+        readonly name: "";
+        readonly type: "uint256";
+    }];
+    readonly stateMutability: "view";
+    readonly type: "function";
+}, {
+    readonly inputs: readonly [];
+    readonly name: "version";
+    readonly outputs: readonly [{
+        readonly name: "";
+        readonly type: "string";
+    }];
+    readonly stateMutability: "view";
+    readonly type: "function";
+}];
+/**
+ * Canonical Permit2 contract address.
+ * Same address on all EVM chains via CREATE2 deployment.
+ *
+ * @see https://github.com/Uniswap/permit2
+ */
+declare const PERMIT2_ADDRESS: "0x000000000022D473030F116dDEE9F6B43aC78BA3";
+/**
+ * x402ExactPermit2Proxy contract address.
+ * Vanity address: 0x4020...0001 for easy recognition.
+ * This address is deterministic based on:
+ * - Arachnid's deterministic deployer (0x4e59b44847b379578588920cA78FbF26c0B4956C)
+ * - Vanity-mined salt for prefix 0x4020 and suffix 0001
+ * - Contract bytecode + constructor args (PERMIT2_ADDRESS)
+ */
+declare const x402ExactPermit2ProxyAddress: "0x4020615294c913F045dc10f0a5cdEbd86c280001";
+/**
+ * x402UptoPermit2Proxy contract address.
+ * Vanity address: 0x4020...0002 for easy recognition.
+ * This address is deterministic based on:
+ * - Arachnid's deterministic deployer (0x4e59b44847b379578588920cA78FbF26c0B4956C)
+ * - Vanity-mined salt for prefix 0x4020 and suffix 0002
+ * - Contract bytecode + constructor args (PERMIT2_ADDRESS)
+ */
+declare const x402UptoPermit2ProxyAddress: "0x4020633461b2895a48930Ff97eE8fCdE8E520002";
+/**
+ * x402ExactPermit2Proxy ABI - settle function for exact payment scheme.
+ */
+declare const x402ExactPermit2ProxyABI: readonly [{
+    readonly type: "function";
+    readonly name: "PERMIT2";
+    readonly inputs: readonly [];
+    readonly outputs: readonly [{
+        readonly name: "";
+        readonly type: "address";
+        readonly internalType: "contract ISignatureTransfer";
+    }];
+    readonly stateMutability: "view";
+}, {
+    readonly type: "function";
+    readonly name: "WITNESS_TYPEHASH";
+    readonly inputs: readonly [];
+    readonly outputs: readonly [{
+        readonly name: "";
+        readonly type: "bytes32";
+        readonly internalType: "bytes32";
+    }];
+    readonly stateMutability: "view";
+}, {
+    readonly type: "function";
+    readonly name: "WITNESS_TYPE_STRING";
+    readonly inputs: readonly [];
+    readonly outputs: readonly [{
+        readonly name: "";
+        readonly type: "string";
+        readonly internalType: "string";
+    }];
+    readonly stateMutability: "view";
+}, {
+    readonly type: "function";
+    readonly name: "initialize";
+    readonly inputs: readonly [{
+        readonly name: "_permit2";
+        readonly type: "address";
+        readonly internalType: "address";
+    }];
+    readonly outputs: readonly [];
+    readonly stateMutability: "nonpayable";
+}, {
+    readonly type: "function";
+    readonly name: "settle";
+    readonly inputs: readonly [{
+        readonly name: "permit";
+        readonly type: "tuple";
+        readonly internalType: "struct ISignatureTransfer.PermitTransferFrom";
+        readonly components: readonly [{
+            readonly name: "permitted";
+            readonly type: "tuple";
+            readonly internalType: "struct ISignatureTransfer.TokenPermissions";
+            readonly components: readonly [{
+                readonly name: "token";
+                readonly type: "address";
+                readonly internalType: "address";
+            }, {
+                readonly name: "amount";
+                readonly type: "uint256";
+                readonly internalType: "uint256";
+            }];
+        }, {
+            readonly name: "nonce";
+            readonly type: "uint256";
+            readonly internalType: "uint256";
+        }, {
+            readonly name: "deadline";
+            readonly type: "uint256";
+            readonly internalType: "uint256";
+        }];
+    }, {
+        readonly name: "owner";
+        readonly type: "address";
+        readonly internalType: "address";
+    }, {
+        readonly name: "witness";
+        readonly type: "tuple";
+        readonly internalType: "struct x402BasePermit2Proxy.Witness";
+        readonly components: readonly [{
+            readonly name: "to";
+            readonly type: "address";
+            readonly internalType: "address";
+        }, {
+            readonly name: "validAfter";
+            readonly type: "uint256";
+            readonly internalType: "uint256";
+        }, {
+            readonly name: "extra";
+            readonly type: "bytes";
+            readonly internalType: "bytes";
+        }];
+    }, {
+        readonly name: "signature";
+        readonly type: "bytes";
+        readonly internalType: "bytes";
+    }];
+    readonly outputs: readonly [];
+    readonly stateMutability: "nonpayable";
+}, {
+    readonly type: "function";
+    readonly name: "settleWithPermit";
+    readonly inputs: readonly [{
+        readonly name: "permit2612";
+        readonly type: "tuple";
+        readonly internalType: "struct x402BasePermit2Proxy.EIP2612Permit";
+        readonly components: readonly [{
+            readonly name: "value";
+            readonly type: "uint256";
+            readonly internalType: "uint256";
+        }, {
+            readonly name: "deadline";
+            readonly type: "uint256";
+            readonly internalType: "uint256";
+        }, {
+            readonly name: "r";
+            readonly type: "bytes32";
+            readonly internalType: "bytes32";
+        }, {
+            readonly name: "s";
+            readonly type: "bytes32";
+            readonly internalType: "bytes32";
+        }, {
+            readonly name: "v";
+            readonly type: "uint8";
+            readonly internalType: "uint8";
+        }];
+    }, {
+        readonly name: "permit";
+        readonly type: "tuple";
+        readonly internalType: "struct ISignatureTransfer.PermitTransferFrom";
+        readonly components: readonly [{
+            readonly name: "permitted";
+            readonly type: "tuple";
+            readonly internalType: "struct ISignatureTransfer.TokenPermissions";
+            readonly components: readonly [{
+                readonly name: "token";
+                readonly type: "address";
+                readonly internalType: "address";
+            }, {
+                readonly name: "amount";
+                readonly type: "uint256";
+                readonly internalType: "uint256";
+            }];
+        }, {
+            readonly name: "nonce";
+            readonly type: "uint256";
+            readonly internalType: "uint256";
+        }, {
+            readonly name: "deadline";
+            readonly type: "uint256";
+            readonly internalType: "uint256";
+        }];
+    }, {
+        readonly name: "owner";
+        readonly type: "address";
+        readonly internalType: "address";
+    }, {
+        readonly name: "witness";
+        readonly type: "tuple";
+        readonly internalType: "struct x402BasePermit2Proxy.Witness";
+        readonly components: readonly [{
+            readonly name: "to";
+            readonly type: "address";
+            readonly internalType: "address";
+        }, {
+            readonly name: "validAfter";
+            readonly type: "uint256";
+            readonly internalType: "uint256";
+        }, {
+            readonly name: "extra";
+            readonly type: "bytes";
+            readonly internalType: "bytes";
+        }];
+    }, {
+        readonly name: "signature";
+        readonly type: "bytes";
+        readonly internalType: "bytes";
+    }];
+    readonly outputs: readonly [];
+    readonly stateMutability: "nonpayable";
+}, {
+    readonly type: "event";
+    readonly name: "Settled";
+    readonly inputs: readonly [];
+    readonly anonymous: false;
+}, {
+    readonly type: "event";
+    readonly name: "SettledWithPermit";
+    readonly inputs: readonly [];
+    readonly anonymous: false;
+}, {
+    readonly type: "error";
+    readonly name: "AlreadyInitialized";
+    readonly inputs: readonly [];
+}, {
+    readonly type: "error";
+    readonly name: "InvalidDestination";
+    readonly inputs: readonly [];
+}, {
+    readonly type: "error";
+    readonly name: "InvalidOwner";
+    readonly inputs: readonly [];
+}, {
+    readonly type: "error";
+    readonly name: "InvalidPermit2Address";
+    readonly inputs: readonly [];
+}, {
+    readonly type: "error";
+    readonly name: "PaymentTooEarly";
+    readonly inputs: readonly [];
+}, {
+    readonly type: "error";
+    readonly name: "ReentrancyGuardReentrantCall";
+    readonly inputs: readonly [];
+}];
+
+export { type AssetTransferMethod, type ExactEIP3009Payload, type ExactEvmPayloadV1, type ExactEvmPayloadV2, type ExactPermit2Payload, PERMIT2_ADDRESS, type Permit2Authorization, type Permit2Witness, authorizationTypes, eip3009ABI, isEIP3009Payload, isPermit2Payload, permit2WitnessTypes, x402ExactPermit2ProxyABI, x402ExactPermit2ProxyAddress, x402UptoPermit2ProxyAddress };

dist/cjs/index.js

@@ -24,9 +24,21 @@ "use strict";
   ExactEvmScheme: () => ExactEvmScheme,
+  PERMIT2_ADDRESS: () => PERMIT2_ADDRESS,
+  authorizationTypes: () => authorizationTypes,
+  createPermit2ApprovalTx: () => createPermit2ApprovalTx,
+  eip3009ABI: () => eip3009ABI,
+  erc20AllowanceAbi: () => erc20AllowanceAbi,
+  getPermit2AllowanceReadParams: () => getPermit2AllowanceReadParams,
+  isEIP3009Payload: () => isEIP3009Payload,
+  isPermit2Payload: () => isPermit2Payload,
+  permit2WitnessTypes: () => permit2WitnessTypes,
   toClientEvmSigner: () => toClientEvmSigner,
-  toFacilitatorEvmSigner: () => toFacilitatorEvmSigner
+  toFacilitatorEvmSigner: () => toFacilitatorEvmSigner,
+  x402ExactPermit2ProxyABI: () => x402ExactPermit2ProxyABI,
+  x402ExactPermit2ProxyAddress: () => x402ExactPermit2ProxyAddress,
+  x402UptoPermit2ProxyAddress: () => x402UptoPermit2ProxyAddress
 });
 module.exports = __toCommonJS(src_exports);
 
-// src/exact/client/scheme.ts
-var import_viem2 = require("viem");
+// src/exact/client/eip3009.ts
+var import_viem4 = require("viem");
 
@@ -44,13 +56,406 @@ // src/constants.ts
 };
+var permit2WitnessTypes = {
+  PermitWitnessTransferFrom: [
+    { name: "permitted", type: "TokenPermissions" },
+    { name: "spender", type: "address" },
+    { name: "nonce", type: "uint256" },
+    { name: "deadline", type: "uint256" },
+    { name: "witness", type: "Witness" }
+  ],
+  TokenPermissions: [
+    { name: "token", type: "address" },
+    { name: "amount", type: "uint256" }
+  ],
+  Witness: [
+    { name: "to", type: "address" },
+    { name: "validAfter", type: "uint256" },
+    { name: "extra", type: "bytes" }
+  ]
+};
+var eip3009ABI = [
+  {
+    inputs: [
+      { name: "from", type: "address" },
+      { name: "to", type: "address" },
+      { name: "value", type: "uint256" },
+      { name: "validAfter", type: "uint256" },
+      { name: "validBefore", type: "uint256" },
+      { name: "nonce", type: "bytes32" },
+      { name: "v", type: "uint8" },
+      { name: "r", type: "bytes32" },
+      { name: "s", type: "bytes32" }
+    ],
+    name: "transferWithAuthorization",
+    outputs: [],
+    stateMutability: "nonpayable",
+    type: "function"
+  },
+  {
+    inputs: [
+      { name: "from", type: "address" },
+      { name: "to", type: "address" },
+      { name: "value", type: "uint256" },
+      { name: "validAfter", type: "uint256" },
+      { name: "validBefore", type: "uint256" },
+      { name: "nonce", type: "bytes32" },
+      { name: "signature", type: "bytes" }
+    ],
+    name: "transferWithAuthorization",
+    outputs: [],
+    stateMutability: "nonpayable",
+    type: "function"
+  },
+  {
+    inputs: [{ name: "account", type: "address" }],
+    name: "balanceOf",
+    outputs: [{ name: "", type: "uint256" }],
+    stateMutability: "view",
+    type: "function"
+  },
+  {
+    inputs: [],
+    name: "version",
+    outputs: [{ name: "", type: "string" }],
+    stateMutability: "view",
+    type: "function"
+  }
+];
+var PERMIT2_ADDRESS = "0x000000000022D473030F116dDEE9F6B43aC78BA3";
+var x402ExactPermit2ProxyAddress = "0x4020615294c913F045dc10f0a5cdEbd86c280001";
+var x402UptoPermit2ProxyAddress = "0x4020633461b2895a48930Ff97eE8fCdE8E520002";
+var x402ExactPermit2ProxyABI = [
+  {
+    type: "function",
+    name: "PERMIT2",
+    inputs: [],
+    outputs: [{ name: "", type: "address", internalType: "contract ISignatureTransfer" }],
+    stateMutability: "view"
+  },
+  {
+    type: "function",
+    name: "WITNESS_TYPEHASH",
+    inputs: [],
+    outputs: [{ name: "", type: "bytes32", internalType: "bytes32" }],
+    stateMutability: "view"
+  },
+  {
+    type: "function",
+    name: "WITNESS_TYPE_STRING",
+    inputs: [],
+    outputs: [{ name: "", type: "string", internalType: "string" }],
+    stateMutability: "view"
+  },
+  {
+    type: "function",
+    name: "initialize",
+    inputs: [{ name: "_permit2", type: "address", internalType: "address" }],
+    outputs: [],
+    stateMutability: "nonpayable"
+  },
+  {
+    type: "function",
+    name: "settle",
+    inputs: [
+      {
+        name: "permit",
+        type: "tuple",
+        internalType: "struct ISignatureTransfer.PermitTransferFrom",
+        components: [
+          {
+            name: "permitted",
+            type: "tuple",
+            internalType: "struct ISignatureTransfer.TokenPermissions",
+            components: [
+              { name: "token", type: "address", internalType: "address" },
+              { name: "amount", type: "uint256", internalType: "uint256" }
+            ]
+          },
+          { name: "nonce", type: "uint256", internalType: "uint256" },
+          { name: "deadline", type: "uint256", internalType: "uint256" }
+        ]
+      },
+      { name: "owner", type: "address", internalType: "address" },
+      {
+        name: "witness",
+        type: "tuple",
+        internalType: "struct x402BasePermit2Proxy.Witness",
+        components: [
+          { name: "to", type: "address", internalType: "address" },
+          { name: "validAfter", type: "uint256", internalType: "uint256" },
+          { name: "extra", type: "bytes", internalType: "bytes" }
+        ]
+      },
+      { name: "signature", type: "bytes", internalType: "bytes" }
+    ],
+    outputs: [],
+    stateMutability: "nonpayable"
+  },
+  {
+    type: "function",
+    name: "settleWithPermit",
+    inputs: [
+      {
+        name: "permit2612",
+        type: "tuple",
+        internalType: "struct x402BasePermit2Proxy.EIP2612Permit",
+        components: [
+          { name: "value", type: "uint256", internalType: "uint256" },
+          { name: "deadline", type: "uint256", internalType: "uint256" },
+          { name: "r", type: "bytes32", internalType: "bytes32" },
+          { name: "s", type: "bytes32", internalType: "bytes32" },
+          { name: "v", type: "uint8", internalType: "uint8" }
+        ]
+      },
+      {
+        name: "permit",
+        type: "tuple",
+        internalType: "struct ISignatureTransfer.PermitTransferFrom",
+        components: [
+          {
+            name: "permitted",
+            type: "tuple",
+            internalType: "struct ISignatureTransfer.TokenPermissions",
+            components: [
+              { name: "token", type: "address", internalType: "address" },
+              { name: "amount", type: "uint256", internalType: "uint256" }
+            ]
+          },
+          { name: "nonce", type: "uint256", internalType: "uint256" },
+          { name: "deadline", type: "uint256", internalType: "uint256" }
+        ]
+      },
+      { name: "owner", type: "address", internalType: "address" },
+      {
+        name: "witness",
+        type: "tuple",
+        internalType: "struct x402BasePermit2Proxy.Witness",
+        components: [
+          { name: "to", type: "address", internalType: "address" },
+          { name: "validAfter", type: "uint256", internalType: "uint256" },
+          { name: "extra", type: "bytes", internalType: "bytes" }
+        ]
+      },
+      { name: "signature", type: "bytes", internalType: "bytes" }
+    ],
+    outputs: [],
+    stateMutability: "nonpayable"
+  },
+  { type: "event", name: "Settled", inputs: [], anonymous: false },
+  { type: "event", name: "SettledWithPermit", inputs: [], anonymous: false },
+  { type: "error", name: "AlreadyInitialized", inputs: [] },
+  { type: "error", name: "InvalidDestination", inputs: [] },
+  { type: "error", name: "InvalidOwner", inputs: [] },
+  { type: "error", name: "InvalidPermit2Address", inputs: [] },
+  { type: "error", name: "PaymentTooEarly", inputs: [] },
+  { type: "error", name: "ReentrancyGuardReentrantCall", inputs: [] }
+];
 
 // src/utils.ts
+var import_viem3 = require("viem");
+
+// src/exact/v1/client/scheme.ts
 var import_viem = require("viem");
-function createNonce() {
-  const cryptoObj = typeof globalThis.crypto !== "undefined" ? globalThis.crypto : globalThis.crypto;
+
+// src/exact/v1/facilitator/scheme.ts
+var import_viem2 = require("viem");
+
+// src/v1/index.ts
+var EVM_NETWORK_CHAIN_ID_MAP = {
+  ethereum: 1,
+  sepolia: 11155111,
+  abstract: 2741,
+  "abstract-testnet": 11124,
+  "base-sepolia": 84532,
+  base: 8453,
+  "avalanche-fuji": 43113,
+  avalanche: 43114,
+  iotex: 4689,
+  sei: 1329,
+  "sei-testnet": 1328,
+  polygon: 137,
+  "polygon-amoy": 80002,
+  peaq: 3338,
+  story: 1514,
+  educhain: 41923,
+  "skale-base-sepolia": 324705682
+};
+var NETWORKS = Object.keys(EVM_NETWORK_CHAIN_ID_MAP);
+
+// src/utils.ts
+function getCrypto() {
+  const cryptoObj = globalThis.crypto;
   if (!cryptoObj) {
     throw new Error("Crypto API not available");
   }
-  return (0, import_viem.toHex)(cryptoObj.getRandomValues(new Uint8Array(32)));
+  return cryptoObj;
 }
+function createNonce() {
+  return (0, import_viem3.toHex)(getCrypto().getRandomValues(new Uint8Array(32)));
+}
+function createPermit2Nonce() {
+  const randomBytes = getCrypto().getRandomValues(new Uint8Array(32));
+  return BigInt((0, import_viem3.toHex)(randomBytes)).toString();
+}
 
+// src/exact/client/eip3009.ts
+async function createEIP3009Payload(signer, x402Version, paymentRequirements) {
+  const nonce = createNonce();
+  const now = Math.floor(Date.now() / 1e3);
+  const authorization = {
+    from: signer.address,
+    to: (0, import_viem4.getAddress)(paymentRequirements.payTo),
+    value: paymentRequirements.amount,
+    validAfter: (now - 600).toString(),
+    validBefore: (now + paymentRequirements.maxTimeoutSeconds).toString(),
+    nonce
+  };
+  const signature = await signEIP3009Authorization(signer, authorization, paymentRequirements);
+  const payload = {
+    authorization,
+    signature
+  };
+  return {
+    x402Version,
+    payload
+  };
+}
+async function signEIP3009Authorization(signer, authorization, requirements) {
+  const chainId = parseInt(requirements.network.split(":")[1]);
+  if (!requirements.extra?.name || !requirements.extra?.version) {
+    throw new Error(
+      `EIP-712 domain parameters (name, version) are required in payment requirements for asset ${requirements.asset}`
+    );
+  }
+  const { name, version } = requirements.extra;
+  const domain = {
+    name,
+    version,
+    chainId,
+    verifyingContract: (0, import_viem4.getAddress)(requirements.asset)
+  };
+  const message = {
+    from: (0, import_viem4.getAddress)(authorization.from),
+    to: (0, import_viem4.getAddress)(authorization.to),
+    value: BigInt(authorization.value),
+    validAfter: BigInt(authorization.validAfter),
+    validBefore: BigInt(authorization.validBefore),
+    nonce: authorization.nonce
+  };
+  return await signer.signTypedData({
+    domain,
+    types: authorizationTypes,
+    primaryType: "TransferWithAuthorization",
+    message
+  });
+}
+
+// src/exact/client/permit2.ts
+var import_viem5 = require("viem");
+var MAX_UINT256 = BigInt("0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff");
+async function createPermit2Payload(signer, x402Version, paymentRequirements) {
+  const now = Math.floor(Date.now() / 1e3);
+  const nonce = createPermit2Nonce();
+  const validAfter = (now - 600).toString();
+  const deadline = (now + paymentRequirements.maxTimeoutSeconds).toString();
+  const permit2Authorization = {
+    from: signer.address,
+    permitted: {
+      token: (0, import_viem5.getAddress)(paymentRequirements.asset),
+      amount: paymentRequirements.amount
+    },
+    spender: x402ExactPermit2ProxyAddress,
+    nonce,
+    deadline,
+    witness: {
+      to: (0, import_viem5.getAddress)(paymentRequirements.payTo),
+      validAfter,
+      extra: "0x"
+    }
+  };
+  const signature = await signPermit2Authorization(
+    signer,
+    permit2Authorization,
+    paymentRequirements
+  );
+  const payload = {
+    signature,
+    permit2Authorization
+  };
+  return {
+    x402Version,
+    payload
+  };
+}
+async function signPermit2Authorization(signer, permit2Authorization, requirements) {
+  const chainId = parseInt(requirements.network.split(":")[1]);
+  const domain = {
+    name: "Permit2",
+    chainId,
+    verifyingContract: PERMIT2_ADDRESS
+  };
+  const message = {
+    permitted: {
+      token: (0, import_viem5.getAddress)(permit2Authorization.permitted.token),
+      amount: BigInt(permit2Authorization.permitted.amount)
+    },
+    spender: (0, import_viem5.getAddress)(permit2Authorization.spender),
+    nonce: BigInt(permit2Authorization.nonce),
+    deadline: BigInt(permit2Authorization.deadline),
+    witness: {
+      to: (0, import_viem5.getAddress)(permit2Authorization.witness.to),
+      validAfter: BigInt(permit2Authorization.witness.validAfter),
+      extra: permit2Authorization.witness.extra
+    }
+  };
+  return await signer.signTypedData({
+    domain,
+    types: permit2WitnessTypes,
+    primaryType: "PermitWitnessTransferFrom",
+    message
+  });
+}
+var erc20ApproveAbi = [
+  {
+    type: "function",
+    name: "approve",
+    inputs: [
+      { name: "spender", type: "address" },
+      { name: "amount", type: "uint256" }
+    ],
+    outputs: [{ type: "bool" }],
+    stateMutability: "nonpayable"
+  }
+];
+var erc20AllowanceAbi = [
+  {
+    type: "function",
+    name: "allowance",
+    inputs: [
+      { name: "owner", type: "address" },
+      { name: "spender", type: "address" }
+    ],
+    outputs: [{ type: "uint256" }],
+    stateMutability: "view"
+  }
+];
+function createPermit2ApprovalTx(tokenAddress) {
+  const data = (0, import_viem5.encodeFunctionData)({
+    abi: erc20ApproveAbi,
+    functionName: "approve",
+    args: [PERMIT2_ADDRESS, MAX_UINT256]
+  });
+  return {
+    to: (0, import_viem5.getAddress)(tokenAddress),
+    data
+  };
+}
+function getPermit2AllowanceReadParams(params) {
+  return {
+    address: (0, import_viem5.getAddress)(params.tokenAddress),
+    abi: erc20AllowanceAbi,
+    functionName: "allowance",
+    args: [(0, import_viem5.getAddress)(params.ownerAddress), PERMIT2_ADDRESS]
+  };
+}
+
 // src/exact/client/scheme.ts
@@ -69,64 +474,14 @@ var ExactEvmScheme = class {
    * Creates a payment payload for the Exact scheme.
+   * Routes to EIP-3009 or Permit2 based on requirements.extra.assetTransferMethod.
    *
    * @param x402Version - The x402 protocol version
    * @param paymentRequirements - The payment requirements
-   * @returns Promise resolving to a payment payload
+   * @returns Promise resolving to a payment payload result
    */
   async createPaymentPayload(x402Version, paymentRequirements) {
-    const nonce = createNonce();
-    const now = Math.floor(Date.now() / 1e3);
-    const authorization = {
-      from: this.signer.address,
-      to: (0, import_viem2.getAddress)(paymentRequirements.payTo),
-      value: paymentRequirements.amount,
-      validAfter: (now - 600).toString(),
-      // 10 minutes before
-      validBefore: (now + paymentRequirements.maxTimeoutSeconds).toString(),
-      nonce
-    };
-    const signature = await this.signAuthorization(authorization, paymentRequirements);
-    const payload = {
-      authorization,
-      signature
-    };
-    return {
-      x402Version,
-      payload
-    };
-  }
-  /**
-   * Sign the EIP-3009 authorization using EIP-712
-   *
-   * @param authorization - The authorization to sign
-   * @param requirements - The payment requirements
-   * @returns Promise resolving to the signature
-   */
-  async signAuthorization(authorization, requirements) {
-    const chainId = parseInt(requirements.network.split(":")[1]);
-    if (!requirements.extra?.name || !requirements.extra?.version) {
-      throw new Error(
-        `EIP-712 domain parameters (name, version) are required in payment requirements for asset ${requirements.asset}`
-      );
+    const assetTransferMethod = paymentRequirements.extra?.assetTransferMethod ?? "eip3009";
+    if (assetTransferMethod === "permit2") {
+      return createPermit2Payload(this.signer, x402Version, paymentRequirements);
     }
-    const { name, version } = requirements.extra;
-    const domain = {
-      name,
-      version,
-      chainId,
-      verifyingContract: (0, import_viem2.getAddress)(requirements.asset)
-    };
-    const message = {
-      from: (0, import_viem2.getAddress)(authorization.from),
-      to: (0, import_viem2.getAddress)(authorization.to),
-      value: BigInt(authorization.value),
-      validAfter: BigInt(authorization.validAfter),
-      validBefore: BigInt(authorization.validBefore),
-      nonce: authorization.nonce
-    };
-    return await this.signer.signTypedData({
-      domain,
-      types: authorizationTypes,
-      primaryType: "TransferWithAuthorization",
-      message
-    });
+    return createEIP3009Payload(this.signer, x402Version, paymentRequirements);
   }
@@ -145,8 +500,28 @@ };
 }
+
+// src/types.ts
+function isPermit2Payload(payload) {
+  return "permit2Authorization" in payload;
+}
+function isEIP3009Payload(payload) {
+  return "authorization" in payload;
+}
 // Annotate the CommonJS export names for ESM import in node:
 0 && (module.exports = {
   ExactEvmScheme,
+  PERMIT2_ADDRESS,
+  authorizationTypes,
+  createPermit2ApprovalTx,
+  eip3009ABI,
+  erc20AllowanceAbi,
+  getPermit2AllowanceReadParams,
+  isEIP3009Payload,
+  isPermit2Payload,
+  permit2WitnessTypes,
   toClientEvmSigner,
-  toFacilitatorEvmSigner
+  toFacilitatorEvmSigner,
+  x402ExactPermit2ProxyABI,
+  x402ExactPermit2ProxyAddress,
+  x402UptoPermit2ProxyAddress
 });
 //# sourceMappingURL=index.js.map

dist/cjs/index.js.map

@@ -1,1 +0,1 @@
-{"version":3,"sources":["../../src/index.ts","../../src/exact/client/scheme.ts","../../src/constants.ts","../../src/utils.ts","../../src/signer.ts"],"sourcesContent":["/**\n * @module @x402/evm - x402 Payment Protocol EVM Implementation\n *\n * This module provides the EVM-specific implementation of the x402 payment protocol.\n */\n\n// Export EVM implementation modules here\n// The actual implementation logic will be added by copying from the core/src/schemes/evm folder\n\nexport { ExactEvmScheme } from \"./exact\";\nexport { toClientEvmSigner, toFacilitatorEvmSigner } from \"./signer\";\nexport type { ClientEvmSigner, FacilitatorEvmSigner } from \"./signer\";\n","import { PaymentPayload, PaymentRequirements, SchemeNetworkClient } from \"@x402/core/types\";\nimport { getAddress } from \"viem\";\nimport { authorizationTypes } from \"../../constants\";\nimport { ClientEvmSigner } from \"../../signer\";\nimport { ExactEvmPayloadV2 } from \"../../types\";\nimport { createNonce } from \"../../utils\";\n\n/**\n * EVM client implementation for the Exact payment scheme.\n *\n */\nexport class ExactEvmScheme implements SchemeNetworkClient {\n  readonly scheme = \"exact\";\n\n  /**\n   * Creates a new ExactEvmClient instance.\n   *\n   * @param signer - The EVM signer for client operations\n   */\n  constructor(private readonly signer: ClientEvmSigner) {}\n\n  /**\n   * Creates a payment payload for the Exact scheme.\n   *\n   * @param x402Version - The x402 protocol version\n   * @param paymentRequirements - The payment requirements\n   * @returns Promise resolving to a payment payload\n   */\n  async createPaymentPayload(\n    x402Version: number,\n    paymentRequirements: PaymentRequirements,\n  ): Promise<Pick<PaymentPayload, \"x402Version\" | \"payload\">> {\n    const nonce = createNonce();\n    const now = Math.floor(Date.now() / 1000);\n\n    const authorization: ExactEvmPayloadV2[\"authorization\"] = {\n      from: this.signer.address,\n      to: getAddress(paymentRequirements.payTo),\n      value: paymentRequirements.amount,\n      validAfter: (now - 600).toString(), // 10 minutes before\n      validBefore: (now + paymentRequirements.maxTimeoutSeconds).toString(),\n      nonce,\n    };\n\n    // Sign the authorization\n    const signature = await this.signAuthorization(authorization, paymentRequirements);\n\n    const payload: ExactEvmPayloadV2 = {\n      authorization,\n      signature,\n    };\n\n    return {\n      x402Version,\n      payload,\n    };\n  }\n\n  /**\n   * Sign the EIP-3009 authorization using EIP-712\n   *\n   * @param authorization - The authorization to sign\n   * @param requirements - The payment requirements\n   * @returns Promise resolving to the signature\n   */\n  private async signAuthorization(\n    authorization: ExactEvmPayloadV2[\"authorization\"],\n    requirements: PaymentRequirements,\n  ): Promise<`0x${string}`> {\n    const chainId = parseInt(requirements.network.split(\":\")[1]);\n\n    if (!requirements.extra?.name || !requirements.extra?.version) {\n      throw new Error(\n        `EIP-712 domain parameters (name, version) are required in payment requirements for asset ${requirements.asset}`,\n      );\n    }\n\n    const { name, version } = requirements.extra;\n\n    const domain = {\n      name,\n      version,\n      chainId,\n      verifyingContract: getAddress(requirements.asset),\n    };\n\n    const message = {\n      from: getAddress(authorization.from),\n      to: getAddress(authorization.to),\n      value: BigInt(authorization.value),\n      validAfter: BigInt(authorization.validAfter),\n      validBefore: BigInt(authorization.validBefore),\n      nonce: authorization.nonce,\n    };\n\n    return await this.signer.signTypedData({\n      domain,\n      types: authorizationTypes,\n      primaryType: \"TransferWithAuthorization\",\n      message,\n    });\n  }\n}\n","// EIP-3009 TransferWithAuthorization types for EIP-712 signing\nexport const authorizationTypes = {\n  TransferWithAuthorization: [\n    { name: \"from\", type: \"address\" },\n    { name: \"to\", type: \"address\" },\n    { name: \"value\", type: \"uint256\" },\n    { name: \"validAfter\", type: \"uint256\" },\n    { name: \"validBefore\", type: \"uint256\" },\n    { name: \"nonce\", type: \"bytes32\" },\n  ],\n} as const;\n\n// EIP3009 ABI for transferWithAuthorization function\nexport const eip3009ABI = [\n  {\n    inputs: [\n      { name: \"from\", type: \"address\" },\n      { name: \"to\", type: \"address\" },\n      { name: \"value\", type: \"uint256\" },\n      { name: \"validAfter\", type: \"uint256\" },\n      { name: \"validBefore\", type: \"uint256\" },\n      { name: \"nonce\", type: \"bytes32\" },\n      { name: \"v\", type: \"uint8\" },\n      { name: \"r\", type: \"bytes32\" },\n      { name: \"s\", type: \"bytes32\" },\n    ],\n    name: \"transferWithAuthorization\",\n    outputs: [],\n    stateMutability: \"nonpayable\",\n    type: \"function\",\n  },\n  {\n    inputs: [\n      { name: \"from\", type: \"address\" },\n      { name: \"to\", type: \"address\" },\n      { name: \"value\", type: \"uint256\" },\n      { name: \"validAfter\", type: \"uint256\" },\n      { name: \"validBefore\", type: \"uint256\" },\n      { name: \"nonce\", type: \"bytes32\" },\n      { name: \"signature\", type: \"bytes\" },\n    ],\n    name: \"transferWithAuthorization\",\n    outputs: [],\n    stateMutability: \"nonpayable\",\n    type: \"function\",\n  },\n  {\n    inputs: [{ name: \"account\", type: \"address\" }],\n    name: \"balanceOf\",\n    outputs: [{ name: \"\", type: \"uint256\" }],\n    stateMutability: \"view\",\n    type: \"function\",\n  },\n  {\n    inputs: [],\n    name: \"version\",\n    outputs: [{ name: \"\", type: \"string\" }],\n    stateMutability: \"view\",\n    type: \"function\",\n  },\n] as const;\n","import { toHex } from \"viem\";\nimport { Network } from \"@x402/core/types\";\n\n/**\n * Extract chain ID from network string (e.g., \"base-sepolia\" -> 84532)\n * Used by v1 implementations\n *\n * @param network - The network identifier\n * @returns The numeric chain ID\n */\nexport function getEvmChainId(network: Network): number {\n  const networkMap: Record<string, number> = {\n    base: 8453,\n    \"base-sepolia\": 84532,\n    ethereum: 1,\n    sepolia: 11155111,\n    polygon: 137,\n    \"polygon-amoy\": 80002,\n  };\n  return networkMap[network] || 1;\n}\n\n/**\n * Create a random 32-byte nonce for authorization\n *\n * @returns A hex-encoded 32-byte nonce\n */\nexport function createNonce(): `0x${string}` {\n  // Use dynamic import to avoid require() in ESM context\n  const cryptoObj =\n    typeof globalThis.crypto !== \"undefined\"\n      ? globalThis.crypto\n      : (globalThis as { crypto?: Crypto }).crypto;\n\n  if (!cryptoObj) {\n    throw new Error(\"Crypto API not available\");\n  }\n\n  return toHex(cryptoObj.getRandomValues(new Uint8Array(32)));\n}\n","/**\n * ClientEvmSigner - Used by x402 clients to sign payment authorizations\n * This is typically a LocalAccount or wallet that holds private keys\n * and can sign EIP-712 typed data for payment authorizations\n */\nexport type ClientEvmSigner = {\n  readonly address: `0x${string}`;\n  signTypedData(message: {\n    domain: Record<string, unknown>;\n    types: Record<string, unknown>;\n    primaryType: string;\n    message: Record<string, unknown>;\n  }): Promise<`0x${string}`>;\n};\n\n/**\n * FacilitatorEvmSigner - 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+{"version":3,"sources":["../../src/index.ts","../../src/exact/client/eip3009.ts","../../src/constants.ts","../../src/utils.ts","../../src/exact/v1/client/scheme.ts","../../src/exact/v1/facilitator/scheme.ts","../../src/v1/index.ts","../../src/exact/client/permit2.ts","../../src/exact/client/scheme.ts","../../src/signer.ts","../../src/types.ts"],"sourcesContent":["/**\n * @module @x402/evm - x402 Payment Protocol EVM Implementation\n *\n * This module provides the EVM-specific implementation of the x402 payment protocol.\n */\n\n// Exact scheme client\nexport { ExactEvmScheme } from \"./exact\";\nexport {\n  createPermit2ApprovalTx,\n  getPermit2AllowanceReadParams,\n  erc20AllowanceAbi,\n  type Permit2AllowanceParams,\n} from \"./exact/client\";\n\n// Signers\nexport { toClientEvmSigner, toFacilitatorEvmSigner } from \"./signer\";\nexport type { ClientEvmSigner, FacilitatorEvmSigner } from \"./signer\";\n\n// Types\nexport type {\n  AssetTransferMethod,\n  ExactEIP3009Payload,\n  ExactPermit2Payload,\n  ExactEvmPayloadV1,\n  ExactEvmPayloadV2,\n  Permit2Witness,\n  Permit2Authorization,\n} from \"./types\";\nexport { isPermit2Payload, isEIP3009Payload } from \"./types\";\n\n// Constants\nexport {\n  PERMIT2_ADDRESS,\n  x402ExactPermit2ProxyAddress,\n  x402UptoPermit2ProxyAddress,\n  permit2WitnessTypes,\n  authorizationTypes,\n  eip3009ABI,\n  x402ExactPermit2ProxyABI,\n} from \"./constants\";\n","import { PaymentRequirements, PaymentPayloadResult } from \"@x402/core/types\";\nimport { getAddress } from \"viem\";\nimport { authorizationTypes } from \"../../constants\";\nimport { ClientEvmSigner } from \"../../signer\";\nimport { ExactEIP3009Payload } from \"../../types\";\nimport { createNonce } from \"../../utils\";\n\n/**\n * Creates an EIP-3009 (transferWithAuthorization) payload.\n *\n * @param signer - The EVM signer for client operations\n * @param x402Version - The x402 protocol version\n * @param paymentRequirements - The payment requirements\n * @returns Promise resolving to a payment payload result\n */\nexport async function createEIP3009Payload(\n  signer: ClientEvmSigner,\n  x402Version: number,\n  paymentRequirements: PaymentRequirements,\n): Promise<PaymentPayloadResult> {\n  const nonce = createNonce();\n  const now = Math.floor(Date.now() / 1000);\n\n  const authorization: ExactEIP3009Payload[\"authorization\"] = {\n    from: signer.address,\n    to: getAddress(paymentRequirements.payTo),\n    value: paymentRequirements.amount,\n    validAfter: (now - 600).toString(),\n    validBefore: (now + paymentRequirements.maxTimeoutSeconds).toString(),\n    nonce,\n  };\n\n  const signature = await signEIP3009Authorization(signer, authorization, paymentRequirements);\n\n  const payload: ExactEIP3009Payload = {\n    authorization,\n    signature,\n  };\n\n  return {\n    x402Version,\n    payload,\n  };\n}\n\n/**\n * Sign the EIP-3009 authorization using EIP-712.\n *\n * @param signer - The EVM signer\n * @param authorization - The authorization to sign\n * @param requirements - The payment requirements\n * @returns Promise resolving to the signature\n */\nasync function signEIP3009Authorization(\n  signer: ClientEvmSigner,\n  authorization: ExactEIP3009Payload[\"authorization\"],\n  requirements: PaymentRequirements,\n): Promise<`0x${string}`> {\n  const chainId = parseInt(requirements.network.split(\":\")[1]);\n\n  if (!requirements.extra?.name || !requirements.extra?.version) {\n    throw new Error(\n      `EIP-712 domain parameters (name, version) are required in payment requirements for asset ${requirements.asset}`,\n    );\n  }\n\n  const { name, version } = requirements.extra;\n\n  const domain = {\n    name,\n    version,\n    chainId,\n    verifyingContract: getAddress(requirements.asset),\n  };\n\n  const message = {\n    from: getAddress(authorization.from),\n    to: getAddress(authorization.to),\n    value: BigInt(authorization.value),\n    validAfter: BigInt(authorization.validAfter),\n    validBefore: BigInt(authorization.validBefore),\n    nonce: authorization.nonce,\n  };\n\n  return await signer.signTypedData({\n    domain,\n    types: authorizationTypes,\n    primaryType: \"TransferWithAuthorization\",\n    message,\n  });\n}\n","// EIP-3009 TransferWithAuthorization types for EIP-712 signing\nexport const authorizationTypes = {\n  TransferWithAuthorization: [\n    { name: \"from\", type: \"address\" },\n    { name: \"to\", type: \"address\" },\n    { name: \"value\", type: \"uint256\" },\n    { name: \"validAfter\", type: \"uint256\" },\n    { name: \"validBefore\", type: \"uint256\" },\n    { name: \"nonce\", type: \"bytes32\" },\n  ],\n} as const;\n\n/**\n * Permit2 EIP-712 types for signing PermitWitnessTransferFrom.\n * Must match the exact format expected by the Permit2 contract.\n * Note: Types must be in ALPHABETICAL order after the primary type (TokenPermissions < Witness).\n */\nexport const permit2WitnessTypes = {\n  PermitWitnessTransferFrom: [\n    { name: \"permitted\", type: \"TokenPermissions\" },\n    { name: \"spender\", type: \"address\" },\n    { name: \"nonce\", type: \"uint256\" },\n    { name: \"deadline\", type: \"uint256\" },\n    { name: \"witness\", type: \"Witness\" },\n  ],\n  TokenPermissions: [\n    { name: \"token\", type: \"address\" },\n    { name: \"amount\", type: \"uint256\" },\n  ],\n  Witness: [\n    { name: \"to\", type: \"address\" },\n    { name: \"validAfter\", type: \"uint256\" },\n    { name: \"extra\", type: \"bytes\" },\n  ],\n} as const;\n\n// EIP3009 ABI for transferWithAuthorization function\nexport const eip3009ABI = [\n  {\n    inputs: [\n      { name: \"from\", type: \"address\" },\n      { name: \"to\", type: \"address\" },\n      { name: \"value\", type: \"uint256\" },\n      { name: \"validAfter\", type: \"uint256\" },\n      { name: \"validBefore\", type: \"uint256\" },\n      { name: \"nonce\", type: \"bytes32\" },\n      { name: \"v\", type: \"uint8\" },\n      { name: \"r\", type: \"bytes32\" },\n      { name: \"s\", type: \"bytes32\" },\n    ],\n    name: \"transferWithAuthorization\",\n    outputs: [],\n    stateMutability: \"nonpayable\",\n    type: \"function\",\n  },\n  {\n    inputs: [\n      { name: \"from\", type: \"address\" },\n      { name: \"to\", type: \"address\" },\n      { name: \"value\", type: \"uint256\" },\n      { name: \"validAfter\", type: \"uint256\" },\n      { name: \"validBefore\", type: \"uint256\" },\n      { name: \"nonce\", type: \"bytes32\" },\n      { name: \"signature\", type: \"bytes\" },\n    ],\n    name: \"transferWithAuthorization\",\n    outputs: [],\n    stateMutability: \"nonpayable\",\n    type: \"function\",\n  },\n  {\n    inputs: [{ name: \"account\", type: \"address\" }],\n    name: \"balanceOf\",\n    outputs: [{ name: \"\", type: \"uint256\" }],\n    stateMutability: \"view\",\n    type: \"function\",\n  },\n  {\n    inputs: [],\n    name: \"version\",\n    outputs: [{ name: \"\", type: \"string\" }],\n    stateMutability: \"view\",\n    type: \"function\",\n  },\n] as const;\n\n/**\n * Canonical Permit2 contract address.\n * Same address on all EVM chains via CREATE2 deployment.\n *\n * @see https://github.com/Uniswap/permit2\n */\nexport const PERMIT2_ADDRESS = \"0x000000000022D473030F116dDEE9F6B43aC78BA3\" as const;\n\n/**\n * x402ExactPermit2Proxy contract address.\n * Vanity address: 0x4020...0001 for easy recognition.\n * This address is deterministic based on:\n * - Arachnid's deterministic deployer (0x4e59b44847b379578588920cA78FbF26c0B4956C)\n * - Vanity-mined salt for prefix 0x4020 and suffix 0001\n * - Contract bytecode + constructor args (PERMIT2_ADDRESS)\n */\nexport const x402ExactPermit2ProxyAddress = \"0x4020615294c913F045dc10f0a5cdEbd86c280001\" as const;\n\n/**\n * x402UptoPermit2Proxy contract address.\n * Vanity address: 0x4020...0002 for easy recognition.\n * This address is deterministic based on:\n * - Arachnid's deterministic deployer (0x4e59b44847b379578588920cA78FbF26c0B4956C)\n * - Vanity-mined salt for prefix 0x4020 and suffix 0002\n * - Contract bytecode + constructor args (PERMIT2_ADDRESS)\n */\nexport const x402UptoPermit2ProxyAddress = \"0x4020633461b2895a48930Ff97eE8fCdE8E520002\" as const;\n\n/**\n * x402UptoPermit2Proxy ABI - settle function for upto payment scheme (variable amounts).\n */\nexport const x402UptoPermit2ProxyABI = [\n  {\n    type: \"function\",\n    name: \"PERMIT2\",\n    inputs: [],\n    outputs: [{ name: \"\", type: \"address\", internalType: \"contract ISignatureTransfer\" }],\n    stateMutability: \"view\",\n  },\n  {\n    type: \"function\",\n    name: \"WITNESS_TYPEHASH\",\n    inputs: [],\n    outputs: [{ name: \"\", type: \"bytes32\", internalType: \"bytes32\" }],\n    stateMutability: \"view\",\n  },\n  {\n    type: \"function\",\n    name: \"WITNESS_TYPE_STRING\",\n    inputs: [],\n    outputs: [{ name: \"\", type: \"string\", internalType: \"string\" }],\n    stateMutability: \"view\",\n  },\n  {\n    type: \"function\",\n    name: \"initialize\",\n    inputs: [{ name: \"_permit2\", type: \"address\", internalType: \"address\" }],\n    outputs: [],\n    stateMutability: \"nonpayable\",\n  },\n  {\n    type: \"function\",\n    name: \"settle\",\n    inputs: [\n      {\n        name: \"permit\",\n        type: \"tuple\",\n        internalType: \"struct ISignatureTransfer.PermitTransferFrom\",\n        components: [\n          {\n            name: \"permitted\",\n            type: \"tuple\",\n            internalType: \"struct ISignatureTransfer.TokenPermissions\",\n            components: [\n              { name: \"token\", type: \"address\", internalType: \"address\" },\n              { name: \"amount\", type: \"uint256\", internalType: \"uint256\" },\n            ],\n          },\n          { name: \"nonce\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"deadline\", type: \"uint256\", internalType: \"uint256\" },\n        ],\n      },\n      { name: \"owner\", type: \"address\", internalType: \"address\" },\n      {\n        name: \"witness\",\n        type: \"tuple\",\n        internalType: \"struct x402BasePermit2Proxy.Witness\",\n        components: [\n          { name: \"to\", type: \"address\", internalType: \"address\" },\n          { name: \"validAfter\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"extra\", type: \"bytes\", internalType: \"bytes\" },\n        ],\n      },\n      { name: \"signature\", type: \"bytes\", internalType: \"bytes\" },\n    ],\n    outputs: [],\n    stateMutability: \"nonpayable\",\n  },\n  {\n    type: \"function\",\n    name: \"settleWithPermit\",\n    inputs: [\n      {\n        name: \"permit2612\",\n        type: \"tuple\",\n        internalType: \"struct x402BasePermit2Proxy.EIP2612Permit\",\n        components: [\n          { name: \"value\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"deadline\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"r\", type: \"bytes32\", internalType: \"bytes32\" },\n          { name: \"s\", type: \"bytes32\", internalType: \"bytes32\" },\n          { name: \"v\", type: \"uint8\", internalType: \"uint8\" },\n        ],\n      },\n      {\n        name: \"permit\",\n        type: \"tuple\",\n        internalType: \"struct ISignatureTransfer.PermitTransferFrom\",\n        components: [\n          {\n            name: \"permitted\",\n            type: \"tuple\",\n            internalType: \"struct ISignatureTransfer.TokenPermissions\",\n            components: [\n              { name: \"token\", type: \"address\", internalType: \"address\" },\n              { name: \"amount\", type: \"uint256\", internalType: \"uint256\" },\n            ],\n          },\n          { name: \"nonce\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"deadline\", type: \"uint256\", internalType: \"uint256\" },\n        ],\n      },\n      { name: \"owner\", type: \"address\", internalType: \"address\" },\n      {\n        name: \"witness\",\n        type: \"tuple\",\n        internalType: \"struct x402BasePermit2Proxy.Witness\",\n        components: [\n          { name: \"to\", type: \"address\", internalType: \"address\" },\n          { name: \"validAfter\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"extra\", type: \"bytes\", internalType: \"bytes\" },\n        ],\n      },\n      { name: \"signature\", type: \"bytes\", internalType: \"bytes\" },\n    ],\n    outputs: [],\n    stateMutability: \"nonpayable\",\n  },\n  { type: \"event\", name: \"Settled\", inputs: [], anonymous: false },\n  { type: \"event\", name: \"SettledWithPermit\", inputs: [], anonymous: false },\n  { type: \"error\", name: \"AlreadyInitialized\", inputs: [] },\n  { type: \"error\", name: \"AmountExceedsPermitted\", inputs: [] },\n  { type: \"error\", name: \"InvalidDestination\", inputs: [] },\n  { type: \"error\", name: \"InvalidOwner\", inputs: [] },\n  { type: \"error\", name: \"InvalidPermit2Address\", inputs: [] },\n  { type: \"error\", name: \"PaymentTooEarly\", inputs: [] },\n  { type: \"error\", name: \"ReentrancyGuardReentrantCall\", inputs: [] },\n] as const;\n\n/**\n * x402ExactPermit2Proxy ABI - settle function for exact payment scheme.\n */\nexport const x402ExactPermit2ProxyABI = [\n  {\n    type: \"function\",\n    name: \"PERMIT2\",\n    inputs: [],\n    outputs: [{ name: \"\", type: \"address\", internalType: \"contract ISignatureTransfer\" }],\n    stateMutability: \"view\",\n  },\n  {\n    type: \"function\",\n    name: \"WITNESS_TYPEHASH\",\n    inputs: [],\n    outputs: [{ name: \"\", type: \"bytes32\", internalType: \"bytes32\" }],\n    stateMutability: \"view\",\n  },\n  {\n    type: \"function\",\n    name: \"WITNESS_TYPE_STRING\",\n    inputs: [],\n    outputs: [{ name: \"\", type: \"string\", internalType: \"string\" }],\n    stateMutability: \"view\",\n  },\n  {\n    type: \"function\",\n    name: \"initialize\",\n    inputs: [{ name: \"_permit2\", type: \"address\", internalType: \"address\" }],\n    outputs: [],\n    stateMutability: \"nonpayable\",\n  },\n  {\n    type: \"function\",\n    name: \"settle\",\n    inputs: [\n      {\n        name: \"permit\",\n        type: \"tuple\",\n        internalType: \"struct ISignatureTransfer.PermitTransferFrom\",\n        components: [\n          {\n            name: \"permitted\",\n            type: \"tuple\",\n            internalType: \"struct ISignatureTransfer.TokenPermissions\",\n            components: [\n              { name: \"token\", type: \"address\", internalType: \"address\" },\n              { name: \"amount\", type: \"uint256\", internalType: \"uint256\" },\n            ],\n          },\n          { name: \"nonce\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"deadline\", type: \"uint256\", internalType: \"uint256\" },\n        ],\n      },\n      { name: \"owner\", type: \"address\", internalType: \"address\" },\n      {\n        name: \"witness\",\n        type: \"tuple\",\n        internalType: \"struct x402BasePermit2Proxy.Witness\",\n        components: [\n          { name: \"to\", type: \"address\", internalType: \"address\" },\n          { name: \"validAfter\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"extra\", type: \"bytes\", internalType: \"bytes\" },\n        ],\n      },\n      { name: \"signature\", type: \"bytes\", internalType: \"bytes\" },\n    ],\n    outputs: [],\n    stateMutability: \"nonpayable\",\n  },\n  {\n    type: \"function\",\n    name: \"settleWithPermit\",\n    inputs: [\n      {\n        name: \"permit2612\",\n        type: \"tuple\",\n        internalType: \"struct x402BasePermit2Proxy.EIP2612Permit\",\n        components: [\n          { name: \"value\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"deadline\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"r\", type: \"bytes32\", internalType: \"bytes32\" },\n          { name: \"s\", type: \"bytes32\", internalType: \"bytes32\" },\n          { name: \"v\", type: \"uint8\", internalType: \"uint8\" },\n        ],\n      },\n      {\n        name: \"permit\",\n        type: \"tuple\",\n        internalType: \"struct ISignatureTransfer.PermitTransferFrom\",\n        components: [\n          {\n            name: \"permitted\",\n            type: \"tuple\",\n            internalType: \"struct ISignatureTransfer.TokenPermissions\",\n            components: [\n              { name: \"token\", type: \"address\", internalType: \"address\" },\n              { name: \"amount\", type: \"uint256\", internalType: \"uint256\" },\n            ],\n          },\n          { name: \"nonce\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"deadline\", type: \"uint256\", internalType: \"uint256\" },\n        ],\n      },\n      { name: \"owner\", type: \"address\", internalType: \"address\" },\n      {\n        name: \"witness\",\n        type: \"tuple\",\n        internalType: \"struct x402BasePermit2Proxy.Witness\",\n        components: [\n          { name: \"to\", type: \"address\", internalType: \"address\" },\n          { name: \"validAfter\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"extra\", type: \"bytes\", internalType: \"bytes\" },\n        ],\n      },\n      { name: \"signature\", type: \"bytes\", internalType: \"bytes\" },\n    ],\n    outputs: [],\n    stateMutability: \"nonpayable\",\n  },\n  { type: \"event\", name: \"Settled\", inputs: [], anonymous: false },\n  { type: \"event\", name: \"SettledWithPermit\", inputs: [], anonymous: false },\n  { type: \"error\", name: \"AlreadyInitialized\", inputs: [] },\n  { type: \"error\", name: \"InvalidDestination\", inputs: [] },\n  { type: \"error\", name: \"InvalidOwner\", inputs: [] },\n  { type: \"error\", name: \"InvalidPermit2Address\", inputs: [] },\n  { type: \"error\", name: \"PaymentTooEarly\", inputs: [] },\n  { type: \"error\", name: \"ReentrancyGuardReentrantCall\", inputs: [] },\n] as const;\n","import { toHex } from \"viem\";\nimport { EVM_NETWORK_CHAIN_ID_MAP, EvmNetworkV1 } from \"./v1\";\n\n/**\n * Extract chain ID from network string (e.g., \"base-sepolia\" -> 84532)\n * Used by v1 implementations\n *\n * @param network - The network identifier\n * @returns The numeric chain ID\n * @throws Error if the network is not supported\n */\nexport function getEvmChainId(network: EvmNetworkV1): number {\n  const chainId = EVM_NETWORK_CHAIN_ID_MAP[network];\n  if (!chainId) {\n    throw new Error(`Unsupported network: ${network}`);\n  }\n  return chainId;\n}\n\n/**\n * Get the crypto object from the global scope.\n *\n * @returns The crypto object\n * @throws Error if crypto API is not available\n */\nfunction getCrypto(): Crypto {\n  const cryptoObj = globalThis.crypto as Crypto | undefined;\n  if (!cryptoObj) {\n    throw new Error(\"Crypto API not available\");\n  }\n  return cryptoObj;\n}\n\n/**\n * Create a random 32-byte nonce for EIP-3009 authorization.\n *\n * @returns A hex-encoded 32-byte nonce\n */\nexport function createNonce(): `0x${string}` {\n  return toHex(getCrypto().getRandomValues(new Uint8Array(32)));\n}\n\n/**\n * Creates a random 256-bit nonce for Permit2.\n * Permit2 uses uint256 nonces (not bytes32 like EIP-3009).\n *\n * @returns A string representation of the random nonce\n */\nexport function createPermit2Nonce(): string {\n  const randomBytes = getCrypto().getRandomValues(new Uint8Array(32));\n  return BigInt(toHex(randomBytes)).toString();\n}\n","import {\n  Network,\n  PaymentPayload,\n  PaymentRequirements,\n  SchemeNetworkClient,\n} from \"@x402/core/types\";\nimport { PaymentRequirementsV1 } from \"@x402/core/types/v1\";\nimport { getAddress } from \"viem\";\nimport { authorizationTypes } from \"../../../constants\";\nimport { ClientEvmSigner } from \"../../../signer\";\nimport { ExactEvmPayloadV1 } from \"../../../types\";\nimport { createNonce, getEvmChainId } from \"../../../utils\";\nimport { EvmNetworkV1 } from \"../../../v1\";\n\n/**\n * EVM client implementation for the Exact payment scheme (V1).\n */\nexport class ExactEvmSchemeV1 implements SchemeNetworkClient {\n  readonly scheme = \"exact\";\n\n  /**\n   * Creates a new ExactEvmClientV1 instance.\n   *\n   * @param signer - The EVM signer for client operations\n   */\n  constructor(private readonly signer: ClientEvmSigner) {}\n\n  /**\n   * Creates a payment payload for the Exact scheme (V1).\n   *\n   * @param x402Version - The x402 protocol version\n   * @param paymentRequirements - The payment requirements\n   * @returns Promise resolving to a payment payload\n   */\n  async createPaymentPayload(\n    x402Version: number,\n    paymentRequirements: PaymentRequirements,\n  ): Promise<\n    Pick<PaymentPayload, \"x402Version\" | \"payload\"> & { scheme: string; network: Network }\n  > {\n    const selectedV1 = paymentRequirements as unknown as PaymentRequirementsV1;\n    const nonce = createNonce();\n    const now = Math.floor(Date.now() / 1000);\n\n    const authorization: ExactEvmPayloadV1[\"authorization\"] = {\n      from: this.signer.address,\n      to: getAddress(selectedV1.payTo),\n      value: selectedV1.maxAmountRequired,\n      validAfter: (now - 600).toString(), // 10 minutes before\n      validBefore: (now + selectedV1.maxTimeoutSeconds).toString(),\n      nonce,\n    };\n\n    // Sign the authorization\n    const signature = await this.signAuthorization(authorization, selectedV1);\n\n    const payload: ExactEvmPayloadV1 = {\n      authorization,\n      signature,\n    };\n\n    return {\n      x402Version,\n      scheme: selectedV1.scheme,\n      network: selectedV1.network,\n      payload,\n    };\n  }\n\n  /**\n   * Sign the EIP-3009 authorization using EIP-712\n   *\n   * @param authorization - The authorization to sign\n   * @param requirements - The payment requirements\n   * @returns Promise resolving to the signature\n   */\n  private async signAuthorization(\n    authorization: ExactEvmPayloadV1[\"authorization\"],\n    requirements: PaymentRequirementsV1,\n  ): Promise<`0x${string}`> {\n    const chainId = getEvmChainId(requirements.network as EvmNetworkV1);\n\n    if (!requirements.extra?.name || !requirements.extra?.version) {\n      throw new Error(\n        `EIP-712 domain parameters (name, version) are required in payment requirements for asset ${requirements.asset}`,\n      );\n    }\n\n    const { name, version } = requirements.extra;\n\n    const domain = {\n      name,\n      version,\n      chainId,\n      verifyingContract: getAddress(requirements.asset),\n    };\n\n    const message = {\n      from: getAddress(authorization.from),\n      to: getAddress(authorization.to),\n      value: BigInt(authorization.value),\n      validAfter: BigInt(authorization.validAfter),\n      validBefore: BigInt(authorization.validBefore),\n      nonce: authorization.nonce,\n    };\n\n    return await this.signer.signTypedData({\n      domain,\n      types: authorizationTypes,\n      primaryType: \"TransferWithAuthorization\",\n      message,\n    });\n  }\n}\n","import {\n  PaymentPayload,\n  PaymentPayloadV1,\n  PaymentRequirements,\n  SchemeNetworkFacilitator,\n  SettleResponse,\n  VerifyResponse,\n} from \"@x402/core/types\";\nimport { PaymentRequirementsV1 } from \"@x402/core/types/v1\";\nimport { getAddress, Hex, isAddressEqual, parseErc6492Signature, parseSignature } from \"viem\";\nimport { authorizationTypes, eip3009ABI } from \"../../../constants\";\nimport { FacilitatorEvmSigner } from \"../../../signer\";\nimport { ExactEvmPayloadV1 } from \"../../../types\";\nimport { getEvmChainId } from \"../../../utils\";\nimport { EvmNetworkV1 } from \"../../../v1\";\n\nexport interface ExactEvmSchemeV1Config {\n  /**\n   * If enabled, the facilitator will deploy ERC-4337 smart wallets\n   * via EIP-6492 when encountering undeployed contract signatures.\n   *\n   * @default false\n   */\n  deployERC4337WithEIP6492?: boolean;\n}\n\n/**\n * EVM facilitator implementation for the Exact payment scheme (V1).\n */\nexport class ExactEvmSchemeV1 implements SchemeNetworkFacilitator {\n  readonly scheme = \"exact\";\n  readonly caipFamily = \"eip155:*\";\n  private readonly config: Required<ExactEvmSchemeV1Config>;\n\n  /**\n   * Creates a new ExactEvmFacilitatorV1 instance.\n   *\n   * @param signer - The EVM signer for facilitator operations\n   * @param config - Optional configuration for the facilitator\n   */\n  constructor(\n    private readonly signer: FacilitatorEvmSigner,\n    config?: ExactEvmSchemeV1Config,\n  ) {\n    this.config = {\n      deployERC4337WithEIP6492: config?.deployERC4337WithEIP6492 ?? false,\n    };\n  }\n\n  /**\n   * Get mechanism-specific extra data for the supported kinds endpoint.\n   * For EVM, no extra data is needed.\n   *\n   * @param _ - The network identifier (unused for EVM)\n   * @returns undefined (EVM has no extra data)\n   */\n  getExtra(_: string): Record<string, unknown> | undefined {\n    return undefined;\n  }\n\n  /**\n   * Get signer addresses used by this facilitator.\n   * Returns all addresses this facilitator can use for signing/settling transactions.\n   *\n   * @param _ - The network identifier (unused for EVM, addresses are network-agnostic)\n   * @returns Array of facilitator wallet addresses\n   */\n  getSigners(_: string): string[] {\n    return [...this.signer.getAddresses()];\n  }\n\n  /**\n   * Verifies a payment payload (V1).\n   *\n   * @param payload - The payment payload to verify\n   * @param requirements - The payment requirements\n   * @returns Promise resolving to verification response\n   */\n  async verify(\n    payload: PaymentPayload,\n    requirements: PaymentRequirements,\n  ): Promise<VerifyResponse> {\n    const requirementsV1 = requirements as unknown as PaymentRequirementsV1;\n    const payloadV1 = payload as unknown as PaymentPayloadV1;\n    const exactEvmPayload = payload.payload as ExactEvmPayloadV1;\n\n    // Verify scheme matches\n    if (payloadV1.scheme !== \"exact\" || requirements.scheme !== \"exact\") {\n      return {\n        isValid: false,\n        invalidReason: \"unsupported_scheme\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Get chain configuration\n    let chainId: number;\n    try {\n      chainId = getEvmChainId(payloadV1.network as EvmNetworkV1);\n    } catch {\n      return {\n        isValid: false,\n        invalidReason: `invalid_network`,\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    if (!requirements.extra?.name || !requirements.extra?.version) {\n      return {\n        isValid: false,\n        invalidReason: \"missing_eip712_domain\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    const { name, version } = requirements.extra;\n    const erc20Address = getAddress(requirements.asset);\n\n    // Verify network matches\n    if (payloadV1.network !== requirements.network) {\n      return {\n        isValid: false,\n        invalidReason: \"network_mismatch\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Build typed data for signature verification\n    const permitTypedData = {\n      types: authorizationTypes,\n      primaryType: \"TransferWithAuthorization\" as const,\n      domain: {\n        name,\n        version,\n        chainId,\n        verifyingContract: erc20Address,\n      },\n      message: {\n        from: exactEvmPayload.authorization.from,\n        to: exactEvmPayload.authorization.to,\n        value: BigInt(exactEvmPayload.authorization.value),\n        validAfter: BigInt(exactEvmPayload.authorization.validAfter),\n        validBefore: BigInt(exactEvmPayload.authorization.validBefore),\n        nonce: exactEvmPayload.authorization.nonce,\n      },\n    };\n\n    // Verify signature\n    try {\n      const recoveredAddress = await this.signer.verifyTypedData({\n        address: exactEvmPayload.authorization.from,\n        ...permitTypedData,\n        signature: exactEvmPayload.signature!,\n      });\n\n      if (!recoveredAddress) {\n        return {\n          isValid: false,\n          invalidReason: \"invalid_exact_evm_payload_signature\",\n          payer: exactEvmPayload.authorization.from,\n        };\n      }\n    } catch {\n      // Signature verification failed - could be an undeployed smart wallet\n      // Check if smart wallet is deployed\n      const signature = exactEvmPayload.signature!;\n      const signatureLength = signature.startsWith(\"0x\") ? signature.length - 2 : signature.length;\n      const isSmartWallet = signatureLength > 130; // 65 bytes = 130 hex chars for EOA\n\n      if (isSmartWallet) {\n        const payerAddress = exactEvmPayload.authorization.from;\n        const bytecode = await this.signer.getCode({ address: payerAddress });\n\n        if (!bytecode || bytecode === \"0x\") {\n          // Wallet is not deployed. Check if it's EIP-6492 with deployment info.\n          // EIP-6492 signatures contain factory address and calldata needed for deployment.\n          // Non-EIP-6492 undeployed wallets cannot succeed (no way to deploy them).\n          const erc6492Data = parseErc6492Signature(signature);\n          const hasDeploymentInfo =\n            erc6492Data.address &&\n            erc6492Data.data &&\n            !isAddressEqual(erc6492Data.address, \"0x0000000000000000000000000000000000000000\");\n\n          if (!hasDeploymentInfo) {\n            // Non-EIP-6492 undeployed smart wallet - will always fail at settlement\n            // since EIP-3009 requires on-chain EIP-1271 validation\n            return {\n              isValid: false,\n              invalidReason: \"invalid_exact_evm_payload_undeployed_smart_wallet\",\n              payer: payerAddress,\n            };\n          }\n          // EIP-6492 signature with deployment info - allow through\n          // Facilitators with sponsored deployment support can handle this in settle()\n        } else {\n          // Wallet is deployed but signature still failed - invalid signature\n          return {\n            isValid: false,\n            invalidReason: \"invalid_exact_evm_payload_signature\",\n            payer: exactEvmPayload.authorization.from,\n          };\n        }\n      } else {\n        // EOA signature failed\n        return {\n          isValid: false,\n          invalidReason: \"invalid_exact_evm_payload_signature\",\n          payer: exactEvmPayload.authorization.from,\n        };\n      }\n    }\n\n    // Verify payment recipient matches\n    if (getAddress(exactEvmPayload.authorization.to) !== getAddress(requirements.payTo)) {\n      return {\n        isValid: false,\n        invalidReason: \"invalid_exact_evm_payload_recipient_mismatch\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Verify validBefore is in the future (with 6 second buffer for block time)\n    const now = Math.floor(Date.now() / 1000);\n    if (BigInt(exactEvmPayload.authorization.validBefore) < BigInt(now + 6)) {\n      return {\n        isValid: false,\n        invalidReason: \"invalid_exact_evm_payload_authorization_valid_before\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Verify validAfter is not in the future\n    if (BigInt(exactEvmPayload.authorization.validAfter) > BigInt(now)) {\n      return {\n        isValid: false,\n        invalidReason: \"invalid_exact_evm_payload_authorization_valid_after\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Check balance\n    try {\n      const balance = (await this.signer.readContract({\n        address: erc20Address,\n        abi: eip3009ABI,\n        functionName: \"balanceOf\",\n        args: [exactEvmPayload.authorization.from],\n      })) as bigint;\n\n      if (BigInt(balance) < BigInt(requirementsV1.maxAmountRequired)) {\n        return {\n          isValid: false,\n          invalidReason: \"insufficient_funds\",\n          invalidMessage: `Insufficient funds to complete the payment. Required: ${requirementsV1.maxAmountRequired} ${requirements.asset}, Available: ${balance.toString()} ${requirements.asset}. Please add funds to your wallet and try again.`,\n          payer: exactEvmPayload.authorization.from,\n        };\n      }\n    } catch {\n      // If we can't check balance, continue with other validations\n    }\n\n    // Verify amount is sufficient\n    if (BigInt(exactEvmPayload.authorization.value) < BigInt(requirementsV1.maxAmountRequired)) {\n      return {\n        isValid: false,\n        invalidReason: \"invalid_exact_evm_payload_authorization_value\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    return {\n      isValid: true,\n      invalidReason: undefined,\n      payer: exactEvmPayload.authorization.from,\n    };\n  }\n\n  /**\n   * Settles a payment by executing the transfer (V1).\n   *\n   * @param payload - The payment payload to settle\n   * @param requirements - The payment requirements\n   * @returns Promise resolving to settlement response\n   */\n  async settle(\n    payload: PaymentPayload,\n    requirements: PaymentRequirements,\n  ): Promise<SettleResponse> {\n    const payloadV1 = payload as unknown as PaymentPayloadV1;\n    const exactEvmPayload = payload.payload as ExactEvmPayloadV1;\n\n    // Re-verify before settling\n    const valid = await this.verify(payload, requirements);\n    if (!valid.isValid) {\n      return {\n        success: false,\n        network: payloadV1.network,\n        transaction: \"\",\n        errorReason: valid.invalidReason ?? \"invalid_scheme\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    try {\n      // Parse ERC-6492 signature if applicable\n      const parseResult = parseErc6492Signature(exactEvmPayload.signature!);\n      const { signature, address: factoryAddress, data: factoryCalldata } = parseResult;\n\n      // Deploy ERC-4337 smart wallet via EIP-6492 if configured and needed\n      if (\n        this.config.deployERC4337WithEIP6492 &&\n        factoryAddress &&\n        factoryCalldata &&\n        !isAddressEqual(factoryAddress, \"0x0000000000000000000000000000000000000000\")\n      ) {\n        // Check if smart wallet is already deployed\n        const payerAddress = exactEvmPayload.authorization.from;\n        const bytecode = await this.signer.getCode({ address: payerAddress });\n\n        if (!bytecode || bytecode === \"0x\") {\n          // Wallet not deployed - attempt deployment\n          try {\n            console.log(`Deploying ERC-4337 smart wallet for ${payerAddress} via EIP-6492`);\n\n            // Send the factory calldata directly as a transaction\n            // The factoryCalldata already contains the complete encoded function call\n            const deployTx = await this.signer.sendTransaction({\n              to: factoryAddress as Hex,\n              data: factoryCalldata as Hex,\n            });\n\n            // Wait for deployment transaction\n            await this.signer.waitForTransactionReceipt({ hash: deployTx });\n            console.log(`Successfully deployed smart wallet for ${payerAddress}`);\n          } catch (deployError) {\n            console.error(\"Smart wallet deployment failed:\", deployError);\n            // Deployment failed - cannot proceed\n            throw deployError;\n          }\n        } else {\n          console.log(`Smart wallet for ${payerAddress} already deployed, skipping deployment`);\n        }\n      }\n\n      // Determine if this is an ECDSA signature (EOA) or smart wallet signature\n      // ECDSA signatures are exactly 65 bytes (130 hex chars without 0x)\n      const signatureLength = signature.startsWith(\"0x\") ? signature.length - 2 : signature.length;\n      const isECDSA = signatureLength === 130;\n\n      let tx: Hex;\n      if (isECDSA) {\n        // For EOA wallets, parse signature into v, r, s and use that overload\n        const parsedSig = parseSignature(signature);\n\n        tx = await this.signer.writeContract({\n          address: getAddress(requirements.asset),\n          abi: eip3009ABI,\n          functionName: \"transferWithAuthorization\",\n          args: [\n            getAddress(exactEvmPayload.authorization.from),\n            getAddress(exactEvmPayload.authorization.to),\n            BigInt(exactEvmPayload.authorization.value),\n            BigInt(exactEvmPayload.authorization.validAfter),\n            BigInt(exactEvmPayload.authorization.validBefore),\n            exactEvmPayload.authorization.nonce,\n            (parsedSig.v as number | undefined) || parsedSig.yParity,\n            parsedSig.r,\n            parsedSig.s,\n          ],\n        });\n      } else {\n        // For smart wallets, use the bytes signature overload\n        // The signature contains WebAuthn/P256 or other ERC-1271 compatible signature data\n        tx = await this.signer.writeContract({\n          address: getAddress(requirements.asset),\n          abi: eip3009ABI,\n          functionName: \"transferWithAuthorization\",\n          args: [\n            getAddress(exactEvmPayload.authorization.from),\n            getAddress(exactEvmPayload.authorization.to),\n            BigInt(exactEvmPayload.authorization.value),\n            BigInt(exactEvmPayload.authorization.validAfter),\n            BigInt(exactEvmPayload.authorization.validBefore),\n            exactEvmPayload.authorization.nonce,\n            signature,\n          ],\n        });\n      }\n\n      // Wait for transaction confirmation\n      const receipt = await this.signer.waitForTransactionReceipt({ hash: tx });\n\n      if (receipt.status !== \"success\") {\n        return {\n          success: false,\n          errorReason: \"invalid_transaction_state\",\n          transaction: tx,\n          network: payloadV1.network,\n          payer: exactEvmPayload.authorization.from,\n        };\n      }\n\n      return {\n        success: true,\n        transaction: tx,\n        network: payloadV1.network,\n        payer: exactEvmPayload.authorization.from,\n      };\n    } catch (error) {\n      console.error(\"Failed to settle transaction:\", error);\n      return {\n        success: false,\n        errorReason: \"transaction_failed\",\n        transaction: \"\",\n        network: payloadV1.network,\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n  }\n}\n","export { ExactEvmSchemeV1 } from \"../exact/v1\";\n\nexport const EVM_NETWORK_CHAIN_ID_MAP = {\n  ethereum: 1,\n  sepolia: 11155111,\n  abstract: 2741,\n  \"abstract-testnet\": 11124,\n  \"base-sepolia\": 84532,\n  base: 8453,\n  \"avalanche-fuji\": 43113,\n  avalanche: 43114,\n  iotex: 4689,\n  sei: 1329,\n  \"sei-testnet\": 1328,\n  polygon: 137,\n  \"polygon-amoy\": 80002,\n  peaq: 3338,\n  story: 1514,\n  educhain: 41923,\n  \"skale-base-sepolia\": 324705682,\n} as const;\n\nexport type EvmNetworkV1 = keyof typeof EVM_NETWORK_CHAIN_ID_MAP;\n\nexport const NETWORKS: string[] = Object.keys(EVM_NETWORK_CHAIN_ID_MAP);\n","import { PaymentRequirements, PaymentPayloadResult } from \"@x402/core/types\";\nimport { encodeFunctionData, getAddress } from \"viem\";\nimport {\n  permit2WitnessTypes,\n  PERMIT2_ADDRESS,\n  x402ExactPermit2ProxyAddress,\n} from \"../../constants\";\nimport { ClientEvmSigner } from \"../../signer\";\nimport { ExactPermit2Payload } from \"../../types\";\nimport { createPermit2Nonce } from \"../../utils\";\n\n/** Maximum uint256 value for unlimited approval. */\nconst MAX_UINT256 = BigInt(\"0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff\");\n\n/**\n * Creates a Permit2 payload using the x402Permit2Proxy witness pattern.\n * The spender is set to x402Permit2Proxy, which enforces that funds\n * can only be sent to the witness.to address.\n *\n * @param signer - The EVM signer for client operations\n * @param x402Version - The x402 protocol version\n * @param paymentRequirements - The payment requirements\n * @returns Promise resolving to a payment payload result\n */\nexport async function createPermit2Payload(\n  signer: ClientEvmSigner,\n  x402Version: number,\n  paymentRequirements: PaymentRequirements,\n): Promise<PaymentPayloadResult> {\n  const now = Math.floor(Date.now() / 1000);\n  const nonce = createPermit2Nonce();\n\n  // Lower time bound - allow some clock skew\n  const validAfter = (now - 600).toString();\n  // Upper time bound is enforced by Permit2's deadline field\n  const deadline = (now + paymentRequirements.maxTimeoutSeconds).toString();\n\n  const permit2Authorization: ExactPermit2Payload[\"permit2Authorization\"] = {\n    from: signer.address,\n    permitted: {\n      token: getAddress(paymentRequirements.asset),\n      amount: paymentRequirements.amount,\n    },\n    spender: x402ExactPermit2ProxyAddress,\n    nonce,\n    deadline,\n    witness: {\n      to: getAddress(paymentRequirements.payTo),\n      validAfter,\n      extra: \"0x\",\n    },\n  };\n\n  const signature = await signPermit2Authorization(\n    signer,\n    permit2Authorization,\n    paymentRequirements,\n  );\n\n  const payload: ExactPermit2Payload = {\n    signature,\n    permit2Authorization,\n  };\n\n  return {\n    x402Version,\n    payload,\n  };\n}\n\n/**\n * Sign the Permit2 authorization using EIP-712 with witness data.\n * The signature authorizes the x402Permit2Proxy to transfer tokens on behalf of the signer.\n *\n * @param signer - The EVM signer\n * @param permit2Authorization - The Permit2 authorization parameters\n * @param requirements - The payment requirements\n * @returns Promise resolving to the signature\n */\nasync function signPermit2Authorization(\n  signer: ClientEvmSigner,\n  permit2Authorization: ExactPermit2Payload[\"permit2Authorization\"],\n  requirements: PaymentRequirements,\n): Promise<`0x${string}`> {\n  const chainId = parseInt(requirements.network.split(\":\")[1]);\n\n  const domain = {\n    name: \"Permit2\",\n    chainId,\n    verifyingContract: PERMIT2_ADDRESS,\n  };\n\n  const message = {\n    permitted: {\n      token: getAddress(permit2Authorization.permitted.token),\n      amount: BigInt(permit2Authorization.permitted.amount),\n    },\n    spender: getAddress(permit2Authorization.spender),\n    nonce: BigInt(permit2Authorization.nonce),\n    deadline: BigInt(permit2Authorization.deadline),\n    witness: {\n      to: getAddress(permit2Authorization.witness.to),\n      validAfter: BigInt(permit2Authorization.witness.validAfter),\n      extra: permit2Authorization.witness.extra,\n    },\n  };\n\n  return await signer.signTypedData({\n    domain,\n    types: permit2WitnessTypes,\n    primaryType: \"PermitWitnessTransferFrom\",\n    message,\n  });\n}\n\n/**\n * ERC20 approve ABI for encoding approval transactions.\n */\nconst erc20ApproveAbi = [\n  {\n    type: \"function\",\n    name: \"approve\",\n    inputs: [\n      { name: \"spender\", type: \"address\" },\n      { name: \"amount\", type: \"uint256\" },\n    ],\n    outputs: [{ type: \"bool\" }],\n    stateMutability: \"nonpayable\",\n  },\n] as const;\n\n/**\n * ERC20 allowance ABI for checking approval status.\n */\nexport const erc20AllowanceAbi = [\n  {\n    type: \"function\",\n    name: \"allowance\",\n    inputs: [\n      { name: \"owner\", type: \"address\" },\n      { name: \"spender\", type: \"address\" },\n    ],\n    outputs: [{ type: \"uint256\" }],\n    stateMutability: \"view\",\n  },\n] as const;\n\n/**\n * Creates transaction data to approve Permit2 to spend tokens.\n * The user sends this transaction (paying gas) before using Permit2 flow.\n *\n * @param tokenAddress - The ERC20 token contract address\n * @returns Transaction data to send for approval\n *\n * @example\n * ```typescript\n * const tx = createPermit2ApprovalTx(\"0x...\");\n * await walletClient.sendTransaction({\n *   to: tx.to,\n *   data: tx.data,\n * });\n * ```\n */\nexport function createPermit2ApprovalTx(tokenAddress: `0x${string}`): {\n  to: `0x${string}`;\n  data: `0x${string}`;\n} {\n  const data = encodeFunctionData({\n    abi: erc20ApproveAbi,\n    functionName: \"approve\",\n    args: [PERMIT2_ADDRESS, MAX_UINT256],\n  });\n\n  return {\n    to: getAddress(tokenAddress),\n    data,\n  };\n}\n\n/**\n * Parameters for checking Permit2 allowance.\n * Application provides these to check if approval is needed.\n */\nexport interface Permit2AllowanceParams {\n  tokenAddress: `0x${string}`;\n  ownerAddress: `0x${string}`;\n}\n\n/**\n * Returns contract read parameters for checking Permit2 allowance.\n * Use with a public client to check if the user has approved Permit2.\n *\n * @param params - The allowance check parameters\n * @returns Contract read parameters for checking allowance\n *\n * @example\n * ```typescript\n * const readParams = getPermit2AllowanceReadParams({\n *   tokenAddress: \"0x...\",\n *   ownerAddress: \"0x...\",\n * });\n *\n * const allowance = await publicClient.readContract(readParams);\n * const needsApproval = allowance < requiredAmount;\n * ```\n */\nexport function getPermit2AllowanceReadParams(params: Permit2AllowanceParams): {\n  address: `0x${string}`;\n  abi: typeof erc20AllowanceAbi;\n  functionName: \"allowance\";\n  args: [`0x${string}`, `0x${string}`];\n} {\n  return {\n    address: getAddress(params.tokenAddress),\n    abi: erc20AllowanceAbi,\n    functionName: \"allowance\",\n    args: [getAddress(params.ownerAddress), PERMIT2_ADDRESS],\n  };\n}\n","import { PaymentRequirements, SchemeNetworkClient, PaymentPayloadResult } from \"@x402/core/types\";\nimport { ClientEvmSigner } from \"../../signer\";\nimport { AssetTransferMethod } from \"../../types\";\nimport { createEIP3009Payload } from \"./eip3009\";\nimport { createPermit2Payload } from \"./permit2\";\n\n/**\n * EVM client implementation for the Exact payment scheme.\n * Supports both EIP-3009 (transferWithAuthorization) and Permit2 flows.\n *\n * Routes to the appropriate authorization method based on\n * `requirements.extra.assetTransferMethod`. Defaults to EIP-3009\n * for backward compatibility with older facilitators.\n */\nexport class ExactEvmScheme implements SchemeNetworkClient {\n  readonly scheme = \"exact\";\n\n  /**\n   * Creates a new ExactEvmClient instance.\n   *\n   * @param signer - The EVM signer for client operations\n   */\n  constructor(private readonly signer: ClientEvmSigner) {}\n\n  /**\n   * Creates a payment payload for the Exact scheme.\n   * Routes to EIP-3009 or Permit2 based on requirements.extra.assetTransferMethod.\n   *\n   * @param x402Version - The x402 protocol version\n   * @param paymentRequirements - The payment requirements\n   * @returns Promise resolving to a payment payload result\n   */\n  async createPaymentPayload(\n    x402Version: number,\n    paymentRequirements: PaymentRequirements,\n  ): Promise<PaymentPayloadResult> {\n    const assetTransferMethod =\n      (paymentRequirements.extra?.assetTransferMethod as AssetTransferMethod) ?? \"eip3009\";\n\n    if (assetTransferMethod === \"permit2\") {\n      return createPermit2Payload(this.signer, x402Version, paymentRequirements);\n    }\n\n    return createEIP3009Payload(this.signer, x402Version, paymentRequirements);\n  }\n}\n","/**\n * ClientEvmSigner - Used by x402 clients to sign payment authorizations\n * This is typically a LocalAccount or wallet that holds private keys\n * and can sign EIP-712 typed data for payment authorizations\n */\nexport type ClientEvmSigner = {\n  readonly address: `0x${string}`;\n  signTypedData(message: {\n    domain: Record<string, unknown>;\n    types: Record<string, unknown>;\n    primaryType: string;\n    message: Record<string, unknown>;\n  }): Promise<`0x${string}`>;\n};\n\n/**\n * FacilitatorEvmSigner - Used by x402 facilitators to verify and settle payments\n * This is typically a viem PublicClient + WalletClient combination that can\n * read contract state, verify signatures, write transactions, and wait for receipts\n *\n * Supports multiple addresses for load balancing, key rotation, and high availability\n */\nexport type FacilitatorEvmSigner = {\n  /**\n   * Get all addresses this facilitator can use for signing\n   * Enables dynamic address selection for load balancing and key rotation\n   */\n  getAddresses(): readonly `0x${string}`[];\n\n  readContract(args: {\n    address: `0x${string}`;\n    abi: readonly unknown[];\n    functionName: string;\n    args?: readonly unknown[];\n  }): Promise<unknown>;\n  verifyTypedData(args: {\n    address: `0x${string}`;\n    domain: Record<string, unknown>;\n    types: Record<string, unknown>;\n    primaryType: string;\n    message: Record<string, unknown>;\n    signature: `0x${string}`;\n  }): Promise<boolean>;\n  writeContract(args: {\n    address: `0x${string}`;\n    abi: readonly unknown[];\n    functionName: string;\n    args: readonly unknown[];\n  }): Promise<`0x${string}`>;\n  sendTransaction(args: { to: `0x${string}`; data: `0x${string}` }): Promise<`0x${string}`>;\n  waitForTransactionReceipt(args: { hash: `0x${string}` }): Promise<{ status: string }>;\n  getCode(args: { address: `0x${string}` }): Promise<`0x${string}` | undefined>;\n};\n\n/**\n * Converts a signer to a ClientEvmSigner\n *\n * @param signer - The signer to convert to a ClientEvmSigner\n * @returns The converted signer\n */\nexport function toClientEvmSigner(signer: ClientEvmSigner): ClientEvmSigner {\n  return signer;\n}\n\n/**\n * Converts a viem client with single address to a FacilitatorEvmSigner\n * Wraps the single address in a getAddresses() function for compatibility\n *\n * @param client - The client to convert (must have 'address' property)\n * @returns FacilitatorEvmSigner with getAddresses() support\n */\nexport function toFacilitatorEvmSigner(\n  client: Omit<FacilitatorEvmSigner, \"getAddresses\"> & { address: `0x${string}` },\n): FacilitatorEvmSigner {\n  return {\n    ...client,\n    getAddresses: () => [client.address],\n  };\n}\n","/**\n * Asset transfer methods for the exact EVM scheme.\n * - eip3009: Uses transferWithAuthorization (USDC, etc.) - recommended for compatible tokens\n * - permit2: Uses Permit2 + x402Permit2Proxy - universal fallback for any ERC-20\n */\nexport type AssetTransferMethod = \"eip3009\" | \"permit2\";\n\n/**\n * EIP-3009 payload for tokens with native transferWithAuthorization support.\n */\nexport type ExactEIP3009Payload = {\n  signature?: `0x${string}`;\n  authorization: {\n    from: `0x${string}`;\n    to: `0x${string}`;\n    value: string;\n    validAfter: string;\n    validBefore: string;\n    nonce: `0x${string}`;\n  };\n};\n\n/**\n * Permit2 witness data structure.\n * Matches the Witness struct in x402Permit2Proxy contract.\n * Note: Upper time bound is enforced by Permit2's `deadline` field, not a witness field.\n */\nexport type Permit2Witness = {\n  to: `0x${string}`;\n  validAfter: string;\n  extra: `0x${string}`;\n};\n\n/**\n * Permit2 authorization parameters.\n * Used to reconstruct the signed message for verification.\n */\nexport type Permit2Authorization = {\n  permitted: {\n    token: `0x${string}`;\n    amount: string;\n  };\n  spender: `0x${string}`;\n  nonce: string;\n  deadline: string;\n  witness: Permit2Witness;\n};\n\n/**\n * Permit2 payload for tokens using the Permit2 + x402Permit2Proxy flow.\n */\nexport type ExactPermit2Payload = {\n  signature: `0x${string}`;\n  permit2Authorization: Permit2Authorization & {\n    from: `0x${string}`;\n  };\n};\n\nexport type ExactEvmPayloadV1 = ExactEIP3009Payload;\n\nexport type ExactEvmPayloadV2 = ExactEIP3009Payload | ExactPermit2Payload;\n\n/**\n * Type guard to check if a payload is a Permit2 payload.\n * Permit2 payloads have a `permit2Authorization` field.\n *\n * @param payload - The payload to check.\n * @returns True if the payload is a Permit2 payload, false otherwise.\n */\nexport function isPermit2Payload(payload: ExactEvmPayloadV2): payload is ExactPermit2Payload {\n  return \"permit2Authorization\" in payload;\n}\n\n/**\n * Type guard to check if a payload is an EIP-3009 payload.\n * EIP-3009 payloads have an `authorization` field.\n *\n * @param payload - The payload to check.\n * @returns True if the payload is an EIP-3009 payload, false otherwise.\n */\nexport function isEIP3009Payload(payload: ExactEvmPayloadV2): payload is ExactEIP3009Payload {\n  return \"authorization\" in 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dist/cjs/v1/index.d.ts

@@ -5,4 +5,24 @@ export { ExactEvmSchemeV1 } from '../exact/v1/client/index.js';
 
+declare const EVM_NETWORK_CHAIN_ID_MAP: {
+    readonly ethereum: 1;
+    readonly sepolia: 11155111;
+    readonly abstract: 2741;
+    readonly "abstract-testnet": 11124;
+    readonly "base-sepolia": 84532;
+    readonly base: 8453;
+    readonly "avalanche-fuji": 43113;
+    readonly avalanche: 43114;
+    readonly iotex: 4689;
+    readonly sei: 1329;
+    readonly "sei-testnet": 1328;
+    readonly polygon: 137;
+    readonly "polygon-amoy": 80002;
+    readonly peaq: 3338;
+    readonly story: 1514;
+    readonly educhain: 41923;
+    readonly "skale-base-sepolia": 324705682;
+};
+type EvmNetworkV1 = keyof typeof EVM_NETWORK_CHAIN_ID_MAP;
 declare const NETWORKS: string[];
 
-export { NETWORKS };
+export { EVM_NETWORK_CHAIN_ID_MAP, type EvmNetworkV1, NETWORKS };

dist/cjs/v1/index.js

@@ -23,2 +23,3 @@ "use strict";
 __export(v1_exports, {
+  EVM_NETWORK_CHAIN_ID_MAP: () => EVM_NETWORK_CHAIN_ID_MAP,
   ExactEvmSchemeV1: () => ExactEvmSchemeV1,
@@ -47,19 +48,18 @@ NETWORKS: () => NETWORKS
 function getEvmChainId(network) {
-  const networkMap = {
-    base: 8453,
-    "base-sepolia": 84532,
-    ethereum: 1,
-    sepolia: 11155111,
-    polygon: 137,
-    "polygon-amoy": 80002
-  };
-  return networkMap[network] || 1;
+  const chainId = EVM_NETWORK_CHAIN_ID_MAP[network];
+  if (!chainId) {
+    throw new Error(`Unsupported network: ${network}`);
+  }
+  return chainId;
 }
-function createNonce() {
-  const cryptoObj = typeof globalThis.crypto !== "undefined" ? globalThis.crypto : globalThis.crypto;
+function getCrypto() {
+  const cryptoObj = globalThis.crypto;
   if (!cryptoObj) {
     throw new Error("Crypto API not available");
   }
-  return (0, import_viem.toHex)(cryptoObj.getRandomValues(new Uint8Array(32)));
+  return cryptoObj;
 }
+function createNonce() {
+  return (0, import_viem.toHex)(getCrypto().getRandomValues(new Uint8Array(32)));
+}
 
@@ -151,21 +151,25 @@ // src/exact/v1/client/scheme.ts
 // src/v1/index.ts
-var NETWORKS = [
-  "abstract",
-  "abstract-testnet",
-  "base-sepolia",
-  "base",
-  "avalanche-fuji",
-  "avalanche",
-  "iotex",
-  "sei",
-  "sei-testnet",
-  "polygon",
-  "polygon-amoy",
-  "peaq",
-  "story",
-  "educhain",
-  "skale-base-sepolia"
-];
+var EVM_NETWORK_CHAIN_ID_MAP = {
+  ethereum: 1,
+  sepolia: 11155111,
+  abstract: 2741,
+  "abstract-testnet": 11124,
+  "base-sepolia": 84532,
+  base: 8453,
+  "avalanche-fuji": 43113,
+  avalanche: 43114,
+  iotex: 4689,
+  sei: 1329,
+  "sei-testnet": 1328,
+  polygon: 137,
+  "polygon-amoy": 80002,
+  peaq: 3338,
+  story: 1514,
+  educhain: 41923,
+  "skale-base-sepolia": 324705682
+};
+var NETWORKS = Object.keys(EVM_NETWORK_CHAIN_ID_MAP);
 // Annotate the CommonJS export names for ESM import in node:
 0 && (module.exports = {
+  EVM_NETWORK_CHAIN_ID_MAP,
   ExactEvmSchemeV1,
@@ -172,0 +176,0 @@ NETWORKS

dist/cjs/v1/index.js.map

@@ -1,1 +0,1 @@
-{"version":3,"sources":["../../../src/v1/index.ts","../../../src/exact/v1/client/scheme.ts","../../../src/constants.ts","../../../src/utils.ts","../../../src/exact/v1/facilitator/scheme.ts"],"sourcesContent":["export { ExactEvmSchemeV1 } from \"../exact/v1\";\n\nexport const NETWORKS: string[] = [\n  \"abstract\",\n  \"abstract-testnet\",\n  \"base-sepolia\",\n  \"base\",\n  \"avalanche-fuji\",\n  \"avalanche\",\n  \"iotex\",\n  \"sei\",\n  \"sei-testnet\",\n  \"polygon\",\n  \"polygon-amoy\",\n  \"peaq\",\n  \"story\",\n  \"educhain\",\n  \"skale-base-sepolia\",\n];\n","import {\n  Network,\n  PaymentPayload,\n  PaymentRequirements,\n  SchemeNetworkClient,\n} from \"@x402/core/types\";\nimport { PaymentRequirementsV1 } from \"@x402/core/types/v1\";\nimport { getAddress } from \"viem\";\nimport { authorizationTypes } from \"../../../constants\";\nimport { ClientEvmSigner } from \"../../../signer\";\nimport { ExactEvmPayloadV1 } from \"../../../types\";\nimport { createNonce, getEvmChainId } from \"../../../utils\";\n\n/**\n * EVM client implementation for the Exact payment scheme (V1).\n */\nexport class ExactEvmSchemeV1 implements SchemeNetworkClient {\n  readonly scheme = \"exact\";\n\n  /**\n   * Creates a new ExactEvmClientV1 instance.\n   *\n   * @param signer - The EVM signer for client operations\n   */\n  constructor(private readonly signer: ClientEvmSigner) {}\n\n  /**\n   * Creates a payment payload for the Exact scheme (V1).\n   *\n   * @param x402Version - The x402 protocol version\n   * @param paymentRequirements - The payment requirements\n   * @returns Promise resolving to a payment payload\n   */\n  async createPaymentPayload(\n    x402Version: number,\n    paymentRequirements: PaymentRequirements,\n  ): Promise<\n    Pick<PaymentPayload, \"x402Version\" | \"payload\"> & { scheme: string; network: Network }\n  > {\n    const selectedV1 = paymentRequirements as unknown as PaymentRequirementsV1;\n    const nonce = createNonce();\n    const now = Math.floor(Date.now() / 1000);\n\n    const authorization: ExactEvmPayloadV1[\"authorization\"] = {\n      from: this.signer.address,\n      to: getAddress(selectedV1.payTo),\n      value: selectedV1.maxAmountRequired,\n      validAfter: (now - 600).toString(), // 10 minutes before\n      validBefore: (now + selectedV1.maxTimeoutSeconds).toString(),\n      nonce,\n    };\n\n    // Sign the authorization\n    const signature = await this.signAuthorization(authorization, selectedV1);\n\n    const payload: ExactEvmPayloadV1 = {\n      authorization,\n      signature,\n    };\n\n    return {\n      x402Version,\n      scheme: selectedV1.scheme,\n      network: selectedV1.network,\n      payload,\n    };\n  }\n\n  /**\n   * Sign the EIP-3009 authorization using EIP-712\n   *\n   * @param authorization - The authorization to sign\n   * @param requirements - The payment requirements\n   * @returns Promise resolving to the signature\n   */\n  private async signAuthorization(\n    authorization: ExactEvmPayloadV1[\"authorization\"],\n    requirements: PaymentRequirementsV1,\n  ): Promise<`0x${string}`> {\n    const chainId = getEvmChainId(requirements.network);\n\n    if (!requirements.extra?.name || !requirements.extra?.version) {\n      throw new Error(\n        `EIP-712 domain parameters (name, version) are required in payment requirements for asset ${requirements.asset}`,\n      );\n    }\n\n    const { name, version } = requirements.extra;\n\n    const domain = {\n      name,\n      version,\n      chainId,\n      verifyingContract: getAddress(requirements.asset),\n    };\n\n    const message = {\n      from: getAddress(authorization.from),\n      to: getAddress(authorization.to),\n      value: BigInt(authorization.value),\n      validAfter: BigInt(authorization.validAfter),\n      validBefore: BigInt(authorization.validBefore),\n      nonce: authorization.nonce,\n    };\n\n    return await this.signer.signTypedData({\n      domain,\n      types: authorizationTypes,\n      primaryType: \"TransferWithAuthorization\",\n      message,\n    });\n  }\n}\n","// EIP-3009 TransferWithAuthorization types for EIP-712 signing\nexport const authorizationTypes = {\n  TransferWithAuthorization: [\n    { name: \"from\", type: \"address\" },\n    { name: \"to\", type: \"address\" },\n    { name: \"value\", type: \"uint256\" },\n    { name: \"validAfter\", type: \"uint256\" },\n    { name: \"validBefore\", type: \"uint256\" },\n    { name: \"nonce\", type: \"bytes32\" },\n  ],\n} as const;\n\n// EIP3009 ABI for transferWithAuthorization function\nexport const eip3009ABI = [\n  {\n    inputs: [\n      { name: \"from\", type: \"address\" },\n      { name: \"to\", type: \"address\" },\n      { name: \"value\", type: \"uint256\" },\n      { name: \"validAfter\", type: \"uint256\" },\n      { name: \"validBefore\", type: \"uint256\" },\n      { name: \"nonce\", type: \"bytes32\" },\n      { name: \"v\", type: \"uint8\" },\n      { name: \"r\", type: \"bytes32\" },\n      { name: \"s\", type: \"bytes32\" },\n    ],\n    name: \"transferWithAuthorization\",\n    outputs: [],\n    stateMutability: \"nonpayable\",\n    type: \"function\",\n  },\n  {\n    inputs: [\n      { name: \"from\", type: \"address\" },\n      { name: \"to\", type: \"address\" },\n      { name: \"value\", type: \"uint256\" },\n      { name: \"validAfter\", type: \"uint256\" },\n      { name: \"validBefore\", type: \"uint256\" },\n      { name: \"nonce\", type: \"bytes32\" },\n      { name: \"signature\", type: \"bytes\" },\n    ],\n    name: \"transferWithAuthorization\",\n    outputs: [],\n    stateMutability: \"nonpayable\",\n    type: \"function\",\n  },\n  {\n    inputs: [{ name: \"account\", type: \"address\" }],\n    name: \"balanceOf\",\n    outputs: [{ name: \"\", type: \"uint256\" }],\n    stateMutability: \"view\",\n    type: \"function\",\n  },\n  {\n    inputs: [],\n    name: \"version\",\n    outputs: [{ name: \"\", type: \"string\" }],\n    stateMutability: \"view\",\n    type: \"function\",\n  },\n] as const;\n","import { toHex } from \"viem\";\nimport { Network } from \"@x402/core/types\";\n\n/**\n * Extract chain ID from network string (e.g., \"base-sepolia\" -> 84532)\n * Used by v1 implementations\n *\n * @param network - The network identifier\n * @returns The numeric chain ID\n */\nexport function getEvmChainId(network: Network): number {\n  const networkMap: Record<string, number> = {\n    base: 8453,\n    \"base-sepolia\": 84532,\n    ethereum: 1,\n    sepolia: 11155111,\n    polygon: 137,\n    \"polygon-amoy\": 80002,\n  };\n  return networkMap[network] || 1;\n}\n\n/**\n * Create a random 32-byte nonce for authorization\n *\n * @returns A hex-encoded 32-byte nonce\n */\nexport function createNonce(): `0x${string}` {\n  // Use dynamic import to avoid require() in ESM context\n  const cryptoObj =\n    typeof globalThis.crypto !== \"undefined\"\n      ? globalThis.crypto\n      : (globalThis as { crypto?: Crypto }).crypto;\n\n  if (!cryptoObj) {\n    throw new Error(\"Crypto API not available\");\n  }\n\n  return toHex(cryptoObj.getRandomValues(new Uint8Array(32)));\n}\n","import {\n  PaymentPayload,\n  PaymentPayloadV1,\n  PaymentRequirements,\n  SchemeNetworkFacilitator,\n  SettleResponse,\n  VerifyResponse,\n} from \"@x402/core/types\";\nimport { PaymentRequirementsV1 } from \"@x402/core/types/v1\";\nimport { getAddress, Hex, isAddressEqual, parseErc6492Signature, parseSignature } from \"viem\";\nimport { authorizationTypes, eip3009ABI } from \"../../../constants\";\nimport { FacilitatorEvmSigner } from \"../../../signer\";\nimport { ExactEvmPayloadV1 } from \"../../../types\";\nimport { getEvmChainId } from \"../../../utils\";\n\nexport interface ExactEvmSchemeV1Config {\n  /**\n   * If enabled, the facilitator will deploy ERC-4337 smart wallets\n   * via EIP-6492 when encountering undeployed contract signatures.\n   *\n   * @default false\n   */\n  deployERC4337WithEIP6492?: boolean;\n}\n\n/**\n * EVM facilitator implementation for the Exact payment scheme (V1).\n */\nexport class ExactEvmSchemeV1 implements SchemeNetworkFacilitator {\n  readonly scheme = \"exact\";\n  readonly caipFamily = \"eip155:*\";\n  private readonly config: Required<ExactEvmSchemeV1Config>;\n\n  /**\n   * Creates a new ExactEvmFacilitatorV1 instance.\n   *\n   * @param signer - The EVM signer for facilitator operations\n   * @param config - Optional configuration for the facilitator\n   */\n  constructor(\n    private readonly signer: FacilitatorEvmSigner,\n    config?: ExactEvmSchemeV1Config,\n  ) {\n    this.config = {\n      deployERC4337WithEIP6492: config?.deployERC4337WithEIP6492 ?? false,\n    };\n  }\n\n  /**\n   * Get mechanism-specific extra data for the supported kinds endpoint.\n   * For EVM, no extra data is needed.\n   *\n   * @param _ - The network identifier (unused for EVM)\n   * @returns undefined (EVM has no extra data)\n   */\n  getExtra(_: string): Record<string, unknown> | undefined {\n    return undefined;\n  }\n\n  /**\n   * Get signer addresses used by this facilitator.\n   * Returns all addresses this facilitator can use for signing/settling transactions.\n   *\n   * @param _ - The network identifier (unused for EVM, addresses are network-agnostic)\n   * @returns Array of facilitator wallet addresses\n   */\n  getSigners(_: string): string[] {\n    return [...this.signer.getAddresses()];\n  }\n\n  /**\n   * Verifies a payment payload (V1).\n   *\n   * @param payload - The payment payload to verify\n   * @param requirements - The payment requirements\n   * @returns Promise resolving to verification response\n   */\n  async verify(\n    payload: PaymentPayload,\n    requirements: PaymentRequirements,\n  ): Promise<VerifyResponse> {\n    const requirementsV1 = requirements as unknown as PaymentRequirementsV1;\n    const payloadV1 = payload as unknown as PaymentPayloadV1;\n    const exactEvmPayload = payload.payload as ExactEvmPayloadV1;\n\n    // Verify scheme matches\n    if (payloadV1.scheme !== \"exact\" || requirements.scheme !== \"exact\") {\n      return {\n        isValid: false,\n        invalidReason: \"unsupported_scheme\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Get chain configuration\n    const chainId = getEvmChainId(payloadV1.network);\n\n    if (!requirements.extra?.name || !requirements.extra?.version) {\n      return {\n        isValid: false,\n        invalidReason: \"missing_eip712_domain\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    const { name, version } = requirements.extra;\n    const erc20Address = getAddress(requirements.asset);\n\n    // Verify network matches\n    if (payloadV1.network !== requirements.network) {\n      return {\n        isValid: false,\n        invalidReason: \"network_mismatch\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Build typed data for signature verification\n    const permitTypedData = {\n      types: authorizationTypes,\n      primaryType: \"TransferWithAuthorization\" as const,\n      domain: {\n        name,\n        version,\n        chainId,\n        verifyingContract: erc20Address,\n      },\n      message: {\n        from: exactEvmPayload.authorization.from,\n        to: exactEvmPayload.authorization.to,\n        value: BigInt(exactEvmPayload.authorization.value),\n        validAfter: BigInt(exactEvmPayload.authorization.validAfter),\n        validBefore: BigInt(exactEvmPayload.authorization.validBefore),\n        nonce: exactEvmPayload.authorization.nonce,\n      },\n    };\n\n    // Verify signature\n    try {\n      const recoveredAddress = await this.signer.verifyTypedData({\n        address: exactEvmPayload.authorization.from,\n        ...permitTypedData,\n        signature: exactEvmPayload.signature!,\n      });\n\n      if (!recoveredAddress) {\n        return {\n          isValid: false,\n          invalidReason: \"invalid_exact_evm_payload_signature\",\n          payer: exactEvmPayload.authorization.from,\n        };\n      }\n    } catch {\n      // Signature verification failed - could be an undeployed smart wallet\n      // Check if smart wallet is deployed\n      const signature = exactEvmPayload.signature!;\n      const signatureLength = signature.startsWith(\"0x\") ? signature.length - 2 : signature.length;\n      const isSmartWallet = signatureLength > 130; // 65 bytes = 130 hex chars for EOA\n\n      if (isSmartWallet) {\n        const payerAddress = exactEvmPayload.authorization.from;\n        const bytecode = await this.signer.getCode({ address: payerAddress });\n\n        if (!bytecode || bytecode === \"0x\") {\n          // Wallet is not deployed. Check if it's EIP-6492 with deployment info.\n          // EIP-6492 signatures contain factory address and calldata needed for deployment.\n          // Non-EIP-6492 undeployed wallets cannot succeed (no way to deploy them).\n          const erc6492Data = parseErc6492Signature(signature);\n          const hasDeploymentInfo =\n            erc6492Data.address &&\n            erc6492Data.data &&\n            !isAddressEqual(erc6492Data.address, \"0x0000000000000000000000000000000000000000\");\n\n          if (!hasDeploymentInfo) {\n            // Non-EIP-6492 undeployed smart wallet - will always fail at settlement\n            // since EIP-3009 requires on-chain EIP-1271 validation\n            return {\n              isValid: false,\n              invalidReason: \"invalid_exact_evm_payload_undeployed_smart_wallet\",\n              payer: payerAddress,\n            };\n          }\n          // EIP-6492 signature with deployment info - allow through\n          // Facilitators with sponsored deployment support can handle this in settle()\n        } else {\n          // Wallet is deployed but signature still failed - invalid signature\n          return {\n            isValid: false,\n            invalidReason: \"invalid_exact_evm_payload_signature\",\n            payer: exactEvmPayload.authorization.from,\n          };\n        }\n      } else {\n        // EOA signature failed\n        return {\n          isValid: false,\n          invalidReason: \"invalid_exact_evm_payload_signature\",\n          payer: exactEvmPayload.authorization.from,\n        };\n      }\n    }\n\n    // Verify payment recipient matches\n    if (getAddress(exactEvmPayload.authorization.to) !== getAddress(requirements.payTo)) {\n      return {\n        isValid: false,\n        invalidReason: \"invalid_exact_evm_payload_recipient_mismatch\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Verify validBefore is in the future (with 6 second buffer for block time)\n    const now = Math.floor(Date.now() / 1000);\n    if (BigInt(exactEvmPayload.authorization.validBefore) < BigInt(now + 6)) {\n      return {\n        isValid: false,\n        invalidReason: \"invalid_exact_evm_payload_authorization_valid_before\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Verify validAfter is not in the future\n    if (BigInt(exactEvmPayload.authorization.validAfter) > BigInt(now)) {\n      return {\n        isValid: false,\n        invalidReason: \"invalid_exact_evm_payload_authorization_valid_after\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Check balance\n    try {\n      const balance = (await this.signer.readContract({\n        address: erc20Address,\n        abi: eip3009ABI,\n        functionName: \"balanceOf\",\n        args: [exactEvmPayload.authorization.from],\n      })) as bigint;\n\n      if (BigInt(balance) < BigInt(requirementsV1.maxAmountRequired)) {\n        return {\n          isValid: false,\n          invalidReason: \"insufficient_funds\",\n          payer: exactEvmPayload.authorization.from,\n        };\n      }\n    } catch {\n      // If we can't check balance, continue with other validations\n    }\n\n    // Verify amount is sufficient\n    if (BigInt(exactEvmPayload.authorization.value) < BigInt(requirementsV1.maxAmountRequired)) {\n      return {\n        isValid: false,\n        invalidReason: \"invalid_exact_evm_payload_authorization_value\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    return {\n      isValid: true,\n      invalidReason: undefined,\n      payer: exactEvmPayload.authorization.from,\n    };\n  }\n\n  /**\n   * Settles a payment by executing the transfer (V1).\n   *\n   * @param payload - The payment payload to settle\n   * @param requirements - The payment requirements\n   * @returns Promise resolving to settlement response\n   */\n  async settle(\n    payload: PaymentPayload,\n    requirements: PaymentRequirements,\n  ): Promise<SettleResponse> {\n    const payloadV1 = payload as unknown as PaymentPayloadV1;\n    const exactEvmPayload = payload.payload as ExactEvmPayloadV1;\n\n    // Re-verify before settling\n    const valid = await this.verify(payload, requirements);\n    if (!valid.isValid) {\n      return {\n        success: false,\n        network: payloadV1.network,\n        transaction: \"\",\n        errorReason: valid.invalidReason ?? \"invalid_scheme\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    try {\n      // Parse ERC-6492 signature if applicable\n      const parseResult = parseErc6492Signature(exactEvmPayload.signature!);\n      const { signature, address: factoryAddress, data: factoryCalldata } = parseResult;\n\n      // Deploy ERC-4337 smart wallet via EIP-6492 if configured and needed\n      if (\n        this.config.deployERC4337WithEIP6492 &&\n        factoryAddress &&\n        factoryCalldata &&\n        !isAddressEqual(factoryAddress, \"0x0000000000000000000000000000000000000000\")\n      ) {\n        // Check if smart wallet is already deployed\n        const payerAddress = exactEvmPayload.authorization.from;\n        const bytecode = await this.signer.getCode({ address: payerAddress });\n\n        if (!bytecode || bytecode === \"0x\") {\n          // Wallet not deployed - attempt deployment\n          try {\n            console.log(`Deploying ERC-4337 smart wallet for ${payerAddress} via EIP-6492`);\n\n            // Send the factory calldata directly as a transaction\n            // The factoryCalldata already contains the complete encoded function call\n            const deployTx = await this.signer.sendTransaction({\n              to: factoryAddress as Hex,\n              data: factoryCalldata as Hex,\n            });\n\n            // Wait for deployment transaction\n            await this.signer.waitForTransactionReceipt({ hash: deployTx });\n            console.log(`Successfully deployed smart wallet for ${payerAddress}`);\n          } catch (deployError) {\n            console.error(\"Smart wallet deployment failed:\", deployError);\n            // Deployment failed - cannot proceed\n            throw deployError;\n          }\n        } else {\n          console.log(`Smart wallet for ${payerAddress} already deployed, skipping deployment`);\n        }\n      }\n\n      // Determine if this is an ECDSA signature (EOA) or smart wallet signature\n      // ECDSA signatures are exactly 65 bytes (130 hex chars without 0x)\n      const signatureLength = signature.startsWith(\"0x\") ? signature.length - 2 : signature.length;\n      const isECDSA = signatureLength === 130;\n\n      let tx: Hex;\n      if (isECDSA) {\n        // For EOA wallets, parse signature into v, r, s and use that overload\n        const parsedSig = parseSignature(signature);\n\n        tx = await this.signer.writeContract({\n          address: getAddress(requirements.asset),\n          abi: eip3009ABI,\n          functionName: \"transferWithAuthorization\",\n          args: [\n            getAddress(exactEvmPayload.authorization.from),\n            getAddress(exactEvmPayload.authorization.to),\n            BigInt(exactEvmPayload.authorization.value),\n            BigInt(exactEvmPayload.authorization.validAfter),\n            BigInt(exactEvmPayload.authorization.validBefore),\n            exactEvmPayload.authorization.nonce,\n            (parsedSig.v as number | undefined) || parsedSig.yParity,\n            parsedSig.r,\n            parsedSig.s,\n          ],\n        });\n      } else {\n        // For smart wallets, use the bytes signature overload\n        // The signature contains WebAuthn/P256 or other ERC-1271 compatible signature data\n        tx = await this.signer.writeContract({\n          address: getAddress(requirements.asset),\n          abi: eip3009ABI,\n          functionName: \"transferWithAuthorization\",\n          args: [\n            getAddress(exactEvmPayload.authorization.from),\n            getAddress(exactEvmPayload.authorization.to),\n            BigInt(exactEvmPayload.authorization.value),\n            BigInt(exactEvmPayload.authorization.validAfter),\n            BigInt(exactEvmPayload.authorization.validBefore),\n            exactEvmPayload.authorization.nonce,\n            signature,\n          ],\n        });\n      }\n\n      // Wait for transaction confirmation\n      const receipt = await this.signer.waitForTransactionReceipt({ hash: tx });\n\n      if (receipt.status !== \"success\") {\n        return {\n          success: false,\n          errorReason: \"invalid_transaction_state\",\n          transaction: tx,\n          network: payloadV1.network,\n          payer: exactEvmPayload.authorization.from,\n        };\n      }\n\n      return {\n        success: true,\n        transaction: tx,\n        network: payloadV1.network,\n        payer: exactEvmPayload.authorization.from,\n      };\n    } catch (error) {\n      console.error(\"Failed to settle transaction:\", error);\n      return {\n        success: false,\n        errorReason: \"transaction_failed\",\n        transaction: \"\",\n        network: payloadV1.network,\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n  }\n}\n"],"mappings":";;;;;;;;;;;;;;;;;;;;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;;;ACOA,IAAAA,eAA2B;;;ACNpB,IAAM,qBAAqB;AAAA,EAChC,2BAA2B;AAAA,IACzB,EAAE,MAAM,QAAQ,MAAM,UAAU;AAAA,IAChC,EAAE,MAAM,MAAM,MAAM,UAAU;AAAA,IAC9B,EAAE,MAAM,SAAS,MAAM,UAAU;AAAA,IACjC,EAAE,MAAM,cAAc,MAAM,UAAU;AAAA,IACtC,EAAE,MAAM,eAAe,MAAM,UAAU;AAAA,IACvC,EAAE,MAAM,SAAS,MAAM,UAAU;AAAA,EACnC;AACF;;;ACVA,kBAAsB;AAUf,SAAS,cAAc,SAA0B;AACtD,QAAM,aAAqC;AAAA,IACzC,MAAM;AAAA,IACN,gBAAgB;AAAA,IAChB,UAAU;AAAA,IACV,SAAS;AAAA,IACT,SAAS;AAAA,IACT,gBAAgB;AAAA,EAClB;AACA,SAAO,WAAW,OAAO,KAAK;AAChC;AAOO,SAAS,cAA6B;AAE3C,QAAM,YACJ,OAAO,WAAW,WAAW,cACzB,WAAW,SACV,WAAmC;AAE1C,MAAI,CAAC,WAAW;AACd,UAAM,IAAI,MAAM,0BAA0B;AAAA,EAC5C;AAEA,aAAO,mBAAM,UAAU,gBAAgB,IAAI,WAAW,EAAE,CAAC,CAAC;AAC5D;;;AFvBO,IAAM,mBAAN,MAAsD;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA,EAQ3D,YAA6B,QAAyB;AAAzB;AAP7B,SAAS,SAAS;AAAA,EAOqC;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA,EASvD,MAAM,qBACJ,aACA,qBAGA;AACA,UAAM,aAAa;AACnB,UAAM,QAAQ,YAAY;AAC1B,UAAM,MAAM,KAAK,MAAM,KAAK,IAAI,IAAI,GAAI;AAExC,UAAM,gBAAoD;AAAA,MACxD,MAAM,KAAK,OAAO;AAAA,MAClB,QAAI,yBAAW,WAAW,KAAK;AAAA,MAC/B,OAAO,WAAW;AAAA,MAClB,aAAa,MAAM,KAAK,SAAS;AAAA;AAAA,MACjC,cAAc,MAAM,WAAW,mBAAmB,SAAS;AAAA,MAC3D;AAAA,IACF;AAGA,UAAM,YAAY,MAAM,KAAK,kBAAkB,eAAe,UAAU;AAExE,UAAM,UAA6B;AAAA,MACjC;AAAA,MACA;AAAA,IACF;AAEA,WAAO;AAAA,MACL;AAAA,MACA,QAAQ,WAAW;AAAA,MACnB,SAAS,WAAW;AAAA,MACpB;AAAA,IACF;AAAA,EACF;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA,EASA,MAAc,kBACZ,eACA,cACwB;AACxB,UAAM,UAAU,cAAc,aAAa,OAAO;AAElD,QAAI,CAAC,aAAa,OAAO,QAAQ,CAAC,aAAa,OAAO,SAAS;AAC7D,YAAM,IAAI;AAAA,QACR,4FAA4F,aAAa,KAAK;AAAA,MAChH;AAAA,IACF;AAEA,UAAM,EAAE,MAAM,QAAQ,IAAI,aAAa;AAEvC,UAAM,SAAS;AAAA,MACb;AAAA,MACA;AAAA,MACA;AAAA,MACA,uBAAmB,yBAAW,aAAa,KAAK;AAAA,IAClD;AAEA,UAAM,UAAU;AAAA,MACd,UAAM,yBAAW,cAAc,IAAI;AAAA,MACnC,QAAI,yBAAW,cAAc,EAAE;AAAA,MAC/B,OAAO,OAAO,cAAc,KAAK;AAAA,MACjC,YAAY,OAAO,cAAc,UAAU;AAAA,MAC3C,aAAa,OAAO,cAAc,WAAW;AAAA,MAC7C,OAAO,cAAc;AAAA,IACvB;AAEA,WAAO,MAAM,KAAK,OAAO,cAAc;AAAA,MACrC;AAAA,MACA,OAAO;AAAA,MACP,aAAa;AAAA,MACb;AAAA,IACF,CAAC;AAAA,EACH;AACF;;;AGvGA,IAAAC,eAAuF;;;AJPhF,IAAM,WAAqB;AAAA,EAChC;AAAA,EACA;AAAA,EACA;AAAA,EACA;AAAA,EACA;AAAA,EACA;AAAA,EACA;AAAA,EACA;AAAA,EACA;AAAA,EACA;AAAA,EACA;AAAA,EACA;AAAA,EACA;AAAA,EACA;AAAA,EACA;AACF;","names":["import_viem","import_viem"]}
+{"version":3,"sources":["../../../src/v1/index.ts","../../../src/exact/v1/client/scheme.ts","../../../src/constants.ts","../../../src/utils.ts","../../../src/exact/v1/facilitator/scheme.ts"],"sourcesContent":["export { ExactEvmSchemeV1 } from \"../exact/v1\";\n\nexport const EVM_NETWORK_CHAIN_ID_MAP = {\n  ethereum: 1,\n  sepolia: 11155111,\n  abstract: 2741,\n  \"abstract-testnet\": 11124,\n  \"base-sepolia\": 84532,\n  base: 8453,\n  \"avalanche-fuji\": 43113,\n  avalanche: 43114,\n  iotex: 4689,\n  sei: 1329,\n  \"sei-testnet\": 1328,\n  polygon: 137,\n  \"polygon-amoy\": 80002,\n  peaq: 3338,\n  story: 1514,\n  educhain: 41923,\n  \"skale-base-sepolia\": 324705682,\n} as const;\n\nexport type EvmNetworkV1 = keyof typeof EVM_NETWORK_CHAIN_ID_MAP;\n\nexport const NETWORKS: string[] = Object.keys(EVM_NETWORK_CHAIN_ID_MAP);\n","import {\n  Network,\n  PaymentPayload,\n  PaymentRequirements,\n  SchemeNetworkClient,\n} from \"@x402/core/types\";\nimport { PaymentRequirementsV1 } from \"@x402/core/types/v1\";\nimport { getAddress } from \"viem\";\nimport { authorizationTypes } from \"../../../constants\";\nimport { ClientEvmSigner } from \"../../../signer\";\nimport { ExactEvmPayloadV1 } from \"../../../types\";\nimport { createNonce, getEvmChainId } from \"../../../utils\";\nimport { EvmNetworkV1 } from \"../../../v1\";\n\n/**\n * EVM client implementation for the Exact payment scheme (V1).\n */\nexport class ExactEvmSchemeV1 implements SchemeNetworkClient {\n  readonly scheme = \"exact\";\n\n  /**\n   * Creates a new ExactEvmClientV1 instance.\n   *\n   * @param signer - The EVM signer for client operations\n   */\n  constructor(private readonly signer: ClientEvmSigner) {}\n\n  /**\n   * Creates a payment payload for the Exact scheme (V1).\n   *\n   * @param x402Version - The x402 protocol version\n   * @param paymentRequirements - The payment requirements\n   * @returns Promise resolving to a payment payload\n   */\n  async createPaymentPayload(\n    x402Version: number,\n    paymentRequirements: PaymentRequirements,\n  ): Promise<\n    Pick<PaymentPayload, \"x402Version\" | \"payload\"> & { scheme: string; network: Network }\n  > {\n    const selectedV1 = paymentRequirements as unknown as PaymentRequirementsV1;\n    const nonce = createNonce();\n    const now = Math.floor(Date.now() / 1000);\n\n    const authorization: ExactEvmPayloadV1[\"authorization\"] = {\n      from: this.signer.address,\n      to: getAddress(selectedV1.payTo),\n      value: selectedV1.maxAmountRequired,\n      validAfter: (now - 600).toString(), // 10 minutes before\n      validBefore: (now + selectedV1.maxTimeoutSeconds).toString(),\n      nonce,\n    };\n\n    // Sign the authorization\n    const signature = await this.signAuthorization(authorization, selectedV1);\n\n    const payload: ExactEvmPayloadV1 = {\n      authorization,\n      signature,\n    };\n\n    return {\n      x402Version,\n      scheme: selectedV1.scheme,\n      network: selectedV1.network,\n      payload,\n    };\n  }\n\n  /**\n   * Sign the EIP-3009 authorization using EIP-712\n   *\n   * @param authorization - The authorization to sign\n   * @param requirements - The payment requirements\n   * @returns Promise resolving to the signature\n   */\n  private async signAuthorization(\n    authorization: ExactEvmPayloadV1[\"authorization\"],\n    requirements: PaymentRequirementsV1,\n  ): Promise<`0x${string}`> {\n    const chainId = getEvmChainId(requirements.network as EvmNetworkV1);\n\n    if (!requirements.extra?.name || !requirements.extra?.version) {\n      throw new Error(\n        `EIP-712 domain parameters (name, version) are required in payment requirements for asset ${requirements.asset}`,\n      );\n    }\n\n    const { name, version } = requirements.extra;\n\n    const domain = {\n      name,\n      version,\n      chainId,\n      verifyingContract: getAddress(requirements.asset),\n    };\n\n    const message = {\n      from: getAddress(authorization.from),\n      to: getAddress(authorization.to),\n      value: BigInt(authorization.value),\n      validAfter: BigInt(authorization.validAfter),\n      validBefore: BigInt(authorization.validBefore),\n      nonce: authorization.nonce,\n    };\n\n    return await this.signer.signTypedData({\n      domain,\n      types: authorizationTypes,\n      primaryType: \"TransferWithAuthorization\",\n      message,\n    });\n  }\n}\n","// EIP-3009 TransferWithAuthorization types for EIP-712 signing\nexport const authorizationTypes = {\n  TransferWithAuthorization: [\n    { name: \"from\", type: \"address\" },\n    { name: \"to\", type: \"address\" },\n    { name: \"value\", type: \"uint256\" },\n    { name: \"validAfter\", type: \"uint256\" },\n    { name: \"validBefore\", type: \"uint256\" },\n    { name: \"nonce\", type: \"bytes32\" },\n  ],\n} as const;\n\n/**\n * Permit2 EIP-712 types for signing PermitWitnessTransferFrom.\n * Must match the exact format expected by the Permit2 contract.\n * Note: Types must be in ALPHABETICAL order after the primary type (TokenPermissions < Witness).\n */\nexport const permit2WitnessTypes = {\n  PermitWitnessTransferFrom: [\n    { name: \"permitted\", type: \"TokenPermissions\" },\n    { name: \"spender\", type: \"address\" },\n    { name: \"nonce\", type: \"uint256\" },\n    { name: \"deadline\", type: \"uint256\" },\n    { name: \"witness\", type: \"Witness\" },\n  ],\n  TokenPermissions: [\n    { name: \"token\", type: \"address\" },\n    { name: \"amount\", type: \"uint256\" },\n  ],\n  Witness: [\n    { name: \"to\", type: \"address\" },\n    { name: \"validAfter\", type: \"uint256\" },\n    { name: \"extra\", type: \"bytes\" },\n  ],\n} as const;\n\n// EIP3009 ABI for transferWithAuthorization function\nexport const eip3009ABI = [\n  {\n    inputs: [\n      { name: \"from\", type: \"address\" },\n      { name: \"to\", type: \"address\" },\n      { name: \"value\", type: \"uint256\" },\n      { name: \"validAfter\", type: \"uint256\" },\n      { name: \"validBefore\", type: \"uint256\" },\n      { name: \"nonce\", type: \"bytes32\" },\n      { name: \"v\", type: \"uint8\" },\n      { name: \"r\", type: \"bytes32\" },\n      { name: \"s\", type: \"bytes32\" },\n    ],\n    name: \"transferWithAuthorization\",\n    outputs: [],\n    stateMutability: \"nonpayable\",\n    type: \"function\",\n  },\n  {\n    inputs: [\n      { name: \"from\", type: \"address\" },\n      { name: \"to\", type: \"address\" },\n      { name: \"value\", type: \"uint256\" },\n      { name: \"validAfter\", type: \"uint256\" },\n      { name: \"validBefore\", type: \"uint256\" },\n      { name: \"nonce\", type: \"bytes32\" },\n      { name: \"signature\", type: \"bytes\" },\n    ],\n    name: \"transferWithAuthorization\",\n    outputs: [],\n    stateMutability: \"nonpayable\",\n    type: \"function\",\n  },\n  {\n    inputs: [{ name: \"account\", type: \"address\" }],\n    name: \"balanceOf\",\n    outputs: [{ name: \"\", type: \"uint256\" }],\n    stateMutability: \"view\",\n    type: \"function\",\n  },\n  {\n    inputs: [],\n    name: \"version\",\n    outputs: [{ name: \"\", type: \"string\" }],\n    stateMutability: \"view\",\n    type: \"function\",\n  },\n] as const;\n\n/**\n * Canonical Permit2 contract address.\n * Same address on all EVM chains via CREATE2 deployment.\n *\n * @see https://github.com/Uniswap/permit2\n */\nexport const PERMIT2_ADDRESS = \"0x000000000022D473030F116dDEE9F6B43aC78BA3\" as const;\n\n/**\n * x402ExactPermit2Proxy contract address.\n * Vanity address: 0x4020...0001 for easy recognition.\n * This address is deterministic based on:\n * - Arachnid's deterministic deployer (0x4e59b44847b379578588920cA78FbF26c0B4956C)\n * - Vanity-mined salt for prefix 0x4020 and suffix 0001\n * - Contract bytecode + constructor args (PERMIT2_ADDRESS)\n */\nexport const x402ExactPermit2ProxyAddress = \"0x4020615294c913F045dc10f0a5cdEbd86c280001\" as const;\n\n/**\n * x402UptoPermit2Proxy contract address.\n * Vanity address: 0x4020...0002 for easy recognition.\n * This address is deterministic based on:\n * - Arachnid's deterministic deployer (0x4e59b44847b379578588920cA78FbF26c0B4956C)\n * - Vanity-mined salt for prefix 0x4020 and suffix 0002\n * - Contract bytecode + constructor args (PERMIT2_ADDRESS)\n */\nexport const x402UptoPermit2ProxyAddress = \"0x4020633461b2895a48930Ff97eE8fCdE8E520002\" as const;\n\n/**\n * x402UptoPermit2Proxy ABI - settle function for upto payment scheme (variable amounts).\n */\nexport const x402UptoPermit2ProxyABI = [\n  {\n    type: \"function\",\n    name: \"PERMIT2\",\n    inputs: [],\n    outputs: [{ name: \"\", type: \"address\", internalType: \"contract ISignatureTransfer\" }],\n    stateMutability: \"view\",\n  },\n  {\n    type: \"function\",\n    name: \"WITNESS_TYPEHASH\",\n    inputs: [],\n    outputs: [{ name: \"\", type: \"bytes32\", internalType: \"bytes32\" }],\n    stateMutability: \"view\",\n  },\n  {\n    type: \"function\",\n    name: \"WITNESS_TYPE_STRING\",\n    inputs: [],\n    outputs: [{ name: \"\", type: \"string\", internalType: \"string\" }],\n    stateMutability: \"view\",\n  },\n  {\n    type: \"function\",\n    name: \"initialize\",\n    inputs: [{ name: \"_permit2\", type: \"address\", internalType: \"address\" }],\n    outputs: [],\n    stateMutability: \"nonpayable\",\n  },\n  {\n    type: \"function\",\n    name: \"settle\",\n    inputs: [\n      {\n        name: \"permit\",\n        type: \"tuple\",\n        internalType: \"struct ISignatureTransfer.PermitTransferFrom\",\n        components: [\n          {\n            name: \"permitted\",\n            type: \"tuple\",\n            internalType: \"struct ISignatureTransfer.TokenPermissions\",\n            components: [\n              { name: \"token\", type: \"address\", internalType: \"address\" },\n              { name: \"amount\", type: \"uint256\", internalType: \"uint256\" },\n            ],\n          },\n          { name: \"nonce\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"deadline\", type: \"uint256\", internalType: \"uint256\" },\n        ],\n      },\n      { name: \"owner\", type: \"address\", internalType: \"address\" },\n      {\n        name: \"witness\",\n        type: \"tuple\",\n        internalType: \"struct x402BasePermit2Proxy.Witness\",\n        components: [\n          { name: \"to\", type: \"address\", internalType: \"address\" },\n          { name: \"validAfter\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"extra\", type: \"bytes\", internalType: \"bytes\" },\n        ],\n      },\n      { name: \"signature\", type: \"bytes\", internalType: \"bytes\" },\n    ],\n    outputs: [],\n    stateMutability: \"nonpayable\",\n  },\n  {\n    type: \"function\",\n    name: \"settleWithPermit\",\n    inputs: [\n      {\n        name: \"permit2612\",\n        type: \"tuple\",\n        internalType: \"struct x402BasePermit2Proxy.EIP2612Permit\",\n        components: [\n          { name: \"value\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"deadline\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"r\", type: \"bytes32\", internalType: \"bytes32\" },\n          { name: \"s\", type: \"bytes32\", internalType: \"bytes32\" },\n          { name: \"v\", type: \"uint8\", internalType: \"uint8\" },\n        ],\n      },\n      {\n        name: \"permit\",\n        type: \"tuple\",\n        internalType: \"struct ISignatureTransfer.PermitTransferFrom\",\n        components: [\n          {\n            name: \"permitted\",\n            type: \"tuple\",\n            internalType: \"struct ISignatureTransfer.TokenPermissions\",\n            components: [\n              { name: \"token\", type: \"address\", internalType: \"address\" },\n              { name: \"amount\", type: \"uint256\", internalType: \"uint256\" },\n            ],\n          },\n          { name: \"nonce\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"deadline\", type: \"uint256\", internalType: \"uint256\" },\n        ],\n      },\n      { name: \"owner\", type: \"address\", internalType: \"address\" },\n      {\n        name: \"witness\",\n        type: \"tuple\",\n        internalType: \"struct x402BasePermit2Proxy.Witness\",\n        components: [\n          { name: \"to\", type: \"address\", internalType: \"address\" },\n          { name: \"validAfter\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"extra\", type: \"bytes\", internalType: \"bytes\" },\n        ],\n      },\n      { name: \"signature\", type: \"bytes\", internalType: \"bytes\" },\n    ],\n    outputs: [],\n    stateMutability: \"nonpayable\",\n  },\n  { type: \"event\", name: \"Settled\", inputs: [], anonymous: false },\n  { type: \"event\", name: \"SettledWithPermit\", inputs: [], anonymous: false },\n  { type: \"error\", name: \"AlreadyInitialized\", inputs: [] },\n  { type: \"error\", name: \"AmountExceedsPermitted\", inputs: [] },\n  { type: \"error\", name: \"InvalidDestination\", inputs: [] },\n  { type: \"error\", name: \"InvalidOwner\", inputs: [] },\n  { type: \"error\", name: \"InvalidPermit2Address\", inputs: [] },\n  { type: \"error\", name: \"PaymentTooEarly\", inputs: [] },\n  { type: \"error\", name: \"ReentrancyGuardReentrantCall\", inputs: [] },\n] as const;\n\n/**\n * x402ExactPermit2Proxy ABI - settle function for exact payment scheme.\n */\nexport const x402ExactPermit2ProxyABI = [\n  {\n    type: \"function\",\n    name: \"PERMIT2\",\n    inputs: [],\n    outputs: [{ name: \"\", type: \"address\", internalType: \"contract ISignatureTransfer\" }],\n    stateMutability: \"view\",\n  },\n  {\n    type: \"function\",\n    name: \"WITNESS_TYPEHASH\",\n    inputs: [],\n    outputs: [{ name: \"\", type: \"bytes32\", internalType: \"bytes32\" }],\n    stateMutability: \"view\",\n  },\n  {\n    type: \"function\",\n    name: \"WITNESS_TYPE_STRING\",\n    inputs: [],\n    outputs: [{ name: \"\", type: \"string\", internalType: \"string\" }],\n    stateMutability: \"view\",\n  },\n  {\n    type: \"function\",\n    name: \"initialize\",\n    inputs: [{ name: \"_permit2\", type: \"address\", internalType: \"address\" }],\n    outputs: [],\n    stateMutability: \"nonpayable\",\n  },\n  {\n    type: \"function\",\n    name: \"settle\",\n    inputs: [\n      {\n        name: \"permit\",\n        type: \"tuple\",\n        internalType: \"struct ISignatureTransfer.PermitTransferFrom\",\n        components: [\n          {\n            name: \"permitted\",\n            type: \"tuple\",\n            internalType: \"struct ISignatureTransfer.TokenPermissions\",\n            components: [\n              { name: \"token\", type: \"address\", internalType: \"address\" },\n              { name: \"amount\", type: \"uint256\", internalType: \"uint256\" },\n            ],\n          },\n          { name: \"nonce\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"deadline\", type: \"uint256\", internalType: \"uint256\" },\n        ],\n      },\n      { name: \"owner\", type: \"address\", internalType: \"address\" },\n      {\n        name: \"witness\",\n        type: \"tuple\",\n        internalType: \"struct x402BasePermit2Proxy.Witness\",\n        components: [\n          { name: \"to\", type: \"address\", internalType: \"address\" },\n          { name: \"validAfter\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"extra\", type: \"bytes\", internalType: \"bytes\" },\n        ],\n      },\n      { name: \"signature\", type: \"bytes\", internalType: \"bytes\" },\n    ],\n    outputs: [],\n    stateMutability: \"nonpayable\",\n  },\n  {\n    type: \"function\",\n    name: \"settleWithPermit\",\n    inputs: [\n      {\n        name: \"permit2612\",\n        type: \"tuple\",\n        internalType: \"struct x402BasePermit2Proxy.EIP2612Permit\",\n        components: [\n          { name: \"value\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"deadline\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"r\", type: \"bytes32\", internalType: \"bytes32\" },\n          { name: \"s\", type: \"bytes32\", internalType: \"bytes32\" },\n          { name: \"v\", type: \"uint8\", internalType: \"uint8\" },\n        ],\n      },\n      {\n        name: \"permit\",\n        type: \"tuple\",\n        internalType: \"struct ISignatureTransfer.PermitTransferFrom\",\n        components: [\n          {\n            name: \"permitted\",\n            type: \"tuple\",\n            internalType: \"struct ISignatureTransfer.TokenPermissions\",\n            components: [\n              { name: \"token\", type: \"address\", internalType: \"address\" },\n              { name: \"amount\", type: \"uint256\", internalType: \"uint256\" },\n            ],\n          },\n          { name: \"nonce\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"deadline\", type: \"uint256\", internalType: \"uint256\" },\n        ],\n      },\n      { name: \"owner\", type: \"address\", internalType: \"address\" },\n      {\n        name: \"witness\",\n        type: \"tuple\",\n        internalType: \"struct x402BasePermit2Proxy.Witness\",\n        components: [\n          { name: \"to\", type: \"address\", internalType: \"address\" },\n          { name: \"validAfter\", type: \"uint256\", internalType: \"uint256\" },\n          { name: \"extra\", type: \"bytes\", internalType: \"bytes\" },\n        ],\n      },\n      { name: \"signature\", type: \"bytes\", internalType: \"bytes\" },\n    ],\n    outputs: [],\n    stateMutability: \"nonpayable\",\n  },\n  { type: \"event\", name: \"Settled\", inputs: [], anonymous: false },\n  { type: \"event\", name: \"SettledWithPermit\", inputs: [], anonymous: false },\n  { type: \"error\", name: \"AlreadyInitialized\", inputs: [] },\n  { type: \"error\", name: \"InvalidDestination\", inputs: [] },\n  { type: \"error\", name: \"InvalidOwner\", inputs: [] },\n  { type: \"error\", name: \"InvalidPermit2Address\", inputs: [] },\n  { type: \"error\", name: \"PaymentTooEarly\", inputs: [] },\n  { type: \"error\", name: \"ReentrancyGuardReentrantCall\", inputs: [] },\n] as const;\n","import { toHex } from \"viem\";\nimport { EVM_NETWORK_CHAIN_ID_MAP, EvmNetworkV1 } from \"./v1\";\n\n/**\n * Extract chain ID from network string (e.g., \"base-sepolia\" -> 84532)\n * Used by v1 implementations\n *\n * @param network - The network identifier\n * @returns The numeric chain ID\n * @throws Error if the network is not supported\n */\nexport function getEvmChainId(network: EvmNetworkV1): number {\n  const chainId = EVM_NETWORK_CHAIN_ID_MAP[network];\n  if (!chainId) {\n    throw new Error(`Unsupported network: ${network}`);\n  }\n  return chainId;\n}\n\n/**\n * Get the crypto object from the global scope.\n *\n * @returns The crypto object\n * @throws Error if crypto API is not available\n */\nfunction getCrypto(): Crypto {\n  const cryptoObj = globalThis.crypto as Crypto | undefined;\n  if (!cryptoObj) {\n    throw new Error(\"Crypto API not available\");\n  }\n  return cryptoObj;\n}\n\n/**\n * Create a random 32-byte nonce for EIP-3009 authorization.\n *\n * @returns A hex-encoded 32-byte nonce\n */\nexport function createNonce(): `0x${string}` {\n  return toHex(getCrypto().getRandomValues(new Uint8Array(32)));\n}\n\n/**\n * Creates a random 256-bit nonce for Permit2.\n * Permit2 uses uint256 nonces (not bytes32 like EIP-3009).\n *\n * @returns A string representation of the random nonce\n */\nexport function createPermit2Nonce(): string {\n  const randomBytes = getCrypto().getRandomValues(new Uint8Array(32));\n  return BigInt(toHex(randomBytes)).toString();\n}\n","import {\n  PaymentPayload,\n  PaymentPayloadV1,\n  PaymentRequirements,\n  SchemeNetworkFacilitator,\n  SettleResponse,\n  VerifyResponse,\n} from \"@x402/core/types\";\nimport { PaymentRequirementsV1 } from \"@x402/core/types/v1\";\nimport { getAddress, Hex, isAddressEqual, parseErc6492Signature, parseSignature } from \"viem\";\nimport { authorizationTypes, eip3009ABI } from \"../../../constants\";\nimport { FacilitatorEvmSigner } from \"../../../signer\";\nimport { ExactEvmPayloadV1 } from \"../../../types\";\nimport { getEvmChainId } from \"../../../utils\";\nimport { EvmNetworkV1 } from \"../../../v1\";\n\nexport interface ExactEvmSchemeV1Config {\n  /**\n   * If enabled, the facilitator will deploy ERC-4337 smart wallets\n   * via EIP-6492 when encountering undeployed contract signatures.\n   *\n   * @default false\n   */\n  deployERC4337WithEIP6492?: boolean;\n}\n\n/**\n * EVM facilitator implementation for the Exact payment scheme (V1).\n */\nexport class ExactEvmSchemeV1 implements SchemeNetworkFacilitator {\n  readonly scheme = \"exact\";\n  readonly caipFamily = \"eip155:*\";\n  private readonly config: Required<ExactEvmSchemeV1Config>;\n\n  /**\n   * Creates a new ExactEvmFacilitatorV1 instance.\n   *\n   * @param signer - The EVM signer for facilitator operations\n   * @param config - Optional configuration for the facilitator\n   */\n  constructor(\n    private readonly signer: FacilitatorEvmSigner,\n    config?: ExactEvmSchemeV1Config,\n  ) {\n    this.config = {\n      deployERC4337WithEIP6492: config?.deployERC4337WithEIP6492 ?? false,\n    };\n  }\n\n  /**\n   * Get mechanism-specific extra data for the supported kinds endpoint.\n   * For EVM, no extra data is needed.\n   *\n   * @param _ - The network identifier (unused for EVM)\n   * @returns undefined (EVM has no extra data)\n   */\n  getExtra(_: string): Record<string, unknown> | undefined {\n    return undefined;\n  }\n\n  /**\n   * Get signer addresses used by this facilitator.\n   * Returns all addresses this facilitator can use for signing/settling transactions.\n   *\n   * @param _ - The network identifier (unused for EVM, addresses are network-agnostic)\n   * @returns Array of facilitator wallet addresses\n   */\n  getSigners(_: string): string[] {\n    return [...this.signer.getAddresses()];\n  }\n\n  /**\n   * Verifies a payment payload (V1).\n   *\n   * @param payload - The payment payload to verify\n   * @param requirements - The payment requirements\n   * @returns Promise resolving to verification response\n   */\n  async verify(\n    payload: PaymentPayload,\n    requirements: PaymentRequirements,\n  ): Promise<VerifyResponse> {\n    const requirementsV1 = requirements as unknown as PaymentRequirementsV1;\n    const payloadV1 = payload as unknown as PaymentPayloadV1;\n    const exactEvmPayload = payload.payload as ExactEvmPayloadV1;\n\n    // Verify scheme matches\n    if (payloadV1.scheme !== \"exact\" || requirements.scheme !== \"exact\") {\n      return {\n        isValid: false,\n        invalidReason: \"unsupported_scheme\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Get chain configuration\n    let chainId: number;\n    try {\n      chainId = getEvmChainId(payloadV1.network as EvmNetworkV1);\n    } catch {\n      return {\n        isValid: false,\n        invalidReason: `invalid_network`,\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    if (!requirements.extra?.name || !requirements.extra?.version) {\n      return {\n        isValid: false,\n        invalidReason: \"missing_eip712_domain\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    const { name, version } = requirements.extra;\n    const erc20Address = getAddress(requirements.asset);\n\n    // Verify network matches\n    if (payloadV1.network !== requirements.network) {\n      return {\n        isValid: false,\n        invalidReason: \"network_mismatch\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Build typed data for signature verification\n    const permitTypedData = {\n      types: authorizationTypes,\n      primaryType: \"TransferWithAuthorization\" as const,\n      domain: {\n        name,\n        version,\n        chainId,\n        verifyingContract: erc20Address,\n      },\n      message: {\n        from: exactEvmPayload.authorization.from,\n        to: exactEvmPayload.authorization.to,\n        value: BigInt(exactEvmPayload.authorization.value),\n        validAfter: BigInt(exactEvmPayload.authorization.validAfter),\n        validBefore: BigInt(exactEvmPayload.authorization.validBefore),\n        nonce: exactEvmPayload.authorization.nonce,\n      },\n    };\n\n    // Verify signature\n    try {\n      const recoveredAddress = await this.signer.verifyTypedData({\n        address: exactEvmPayload.authorization.from,\n        ...permitTypedData,\n        signature: exactEvmPayload.signature!,\n      });\n\n      if (!recoveredAddress) {\n        return {\n          isValid: false,\n          invalidReason: \"invalid_exact_evm_payload_signature\",\n          payer: exactEvmPayload.authorization.from,\n        };\n      }\n    } catch {\n      // Signature verification failed - could be an undeployed smart wallet\n      // Check if smart wallet is deployed\n      const signature = exactEvmPayload.signature!;\n      const signatureLength = signature.startsWith(\"0x\") ? signature.length - 2 : signature.length;\n      const isSmartWallet = signatureLength > 130; // 65 bytes = 130 hex chars for EOA\n\n      if (isSmartWallet) {\n        const payerAddress = exactEvmPayload.authorization.from;\n        const bytecode = await this.signer.getCode({ address: payerAddress });\n\n        if (!bytecode || bytecode === \"0x\") {\n          // Wallet is not deployed. Check if it's EIP-6492 with deployment info.\n          // EIP-6492 signatures contain factory address and calldata needed for deployment.\n          // Non-EIP-6492 undeployed wallets cannot succeed (no way to deploy them).\n          const erc6492Data = parseErc6492Signature(signature);\n          const hasDeploymentInfo =\n            erc6492Data.address &&\n            erc6492Data.data &&\n            !isAddressEqual(erc6492Data.address, \"0x0000000000000000000000000000000000000000\");\n\n          if (!hasDeploymentInfo) {\n            // Non-EIP-6492 undeployed smart wallet - will always fail at settlement\n            // since EIP-3009 requires on-chain EIP-1271 validation\n            return {\n              isValid: false,\n              invalidReason: \"invalid_exact_evm_payload_undeployed_smart_wallet\",\n              payer: payerAddress,\n            };\n          }\n          // EIP-6492 signature with deployment info - allow through\n          // Facilitators with sponsored deployment support can handle this in settle()\n        } else {\n          // Wallet is deployed but signature still failed - invalid signature\n          return {\n            isValid: false,\n            invalidReason: \"invalid_exact_evm_payload_signature\",\n            payer: exactEvmPayload.authorization.from,\n          };\n        }\n      } else {\n        // EOA signature failed\n        return {\n          isValid: false,\n          invalidReason: \"invalid_exact_evm_payload_signature\",\n          payer: exactEvmPayload.authorization.from,\n        };\n      }\n    }\n\n    // Verify payment recipient matches\n    if (getAddress(exactEvmPayload.authorization.to) !== getAddress(requirements.payTo)) {\n      return {\n        isValid: false,\n        invalidReason: \"invalid_exact_evm_payload_recipient_mismatch\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Verify validBefore is in the future (with 6 second buffer for block time)\n    const now = Math.floor(Date.now() / 1000);\n    if (BigInt(exactEvmPayload.authorization.validBefore) < BigInt(now + 6)) {\n      return {\n        isValid: false,\n        invalidReason: \"invalid_exact_evm_payload_authorization_valid_before\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Verify validAfter is not in the future\n    if (BigInt(exactEvmPayload.authorization.validAfter) > BigInt(now)) {\n      return {\n        isValid: false,\n        invalidReason: \"invalid_exact_evm_payload_authorization_valid_after\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Check balance\n    try {\n      const balance = (await this.signer.readContract({\n        address: erc20Address,\n        abi: eip3009ABI,\n        functionName: \"balanceOf\",\n        args: [exactEvmPayload.authorization.from],\n      })) as bigint;\n\n      if (BigInt(balance) < BigInt(requirementsV1.maxAmountRequired)) {\n        return {\n          isValid: false,\n          invalidReason: \"insufficient_funds\",\n          invalidMessage: `Insufficient funds to complete the payment. Required: ${requirementsV1.maxAmountRequired} ${requirements.asset}, Available: ${balance.toString()} ${requirements.asset}. Please add funds to your wallet and try again.`,\n          payer: exactEvmPayload.authorization.from,\n        };\n      }\n    } catch {\n      // If we can't check balance, continue with other validations\n    }\n\n    // Verify amount is sufficient\n    if (BigInt(exactEvmPayload.authorization.value) < BigInt(requirementsV1.maxAmountRequired)) {\n      return {\n        isValid: false,\n        invalidReason: \"invalid_exact_evm_payload_authorization_value\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    return {\n      isValid: true,\n      invalidReason: undefined,\n      payer: exactEvmPayload.authorization.from,\n    };\n  }\n\n  /**\n   * Settles a payment by executing the transfer (V1).\n   *\n   * @param payload - The payment payload to settle\n   * @param requirements - The payment requirements\n   * @returns Promise resolving to settlement response\n   */\n  async settle(\n    payload: PaymentPayload,\n    requirements: PaymentRequirements,\n  ): Promise<SettleResponse> {\n    const payloadV1 = payload as unknown as PaymentPayloadV1;\n    const exactEvmPayload = payload.payload as ExactEvmPayloadV1;\n\n    // Re-verify before settling\n    const valid = await this.verify(payload, requirements);\n    if (!valid.isValid) {\n      return {\n        success: false,\n        network: payloadV1.network,\n        transaction: \"\",\n        errorReason: valid.invalidReason ?? \"invalid_scheme\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    try {\n      // Parse ERC-6492 signature if applicable\n      const parseResult = parseErc6492Signature(exactEvmPayload.signature!);\n      const { signature, address: factoryAddress, data: factoryCalldata } = parseResult;\n\n      // Deploy ERC-4337 smart wallet via EIP-6492 if configured and needed\n      if (\n        this.config.deployERC4337WithEIP6492 &&\n        factoryAddress &&\n        factoryCalldata &&\n        !isAddressEqual(factoryAddress, \"0x0000000000000000000000000000000000000000\")\n      ) {\n        // Check if smart wallet is already deployed\n        const payerAddress = exactEvmPayload.authorization.from;\n        const bytecode = await this.signer.getCode({ address: payerAddress });\n\n        if (!bytecode || bytecode === \"0x\") {\n          // Wallet not deployed - attempt deployment\n          try {\n            console.log(`Deploying ERC-4337 smart wallet for ${payerAddress} via EIP-6492`);\n\n            // Send the factory calldata directly as a transaction\n            // The factoryCalldata already contains the complete encoded function call\n            const deployTx = await this.signer.sendTransaction({\n              to: factoryAddress as Hex,\n              data: factoryCalldata as Hex,\n            });\n\n            // Wait for deployment transaction\n            await this.signer.waitForTransactionReceipt({ hash: deployTx });\n            console.log(`Successfully deployed smart wallet for ${payerAddress}`);\n          } catch (deployError) {\n            console.error(\"Smart wallet deployment failed:\", deployError);\n            // Deployment failed - cannot proceed\n            throw deployError;\n          }\n        } else {\n          console.log(`Smart wallet for ${payerAddress} already deployed, skipping deployment`);\n        }\n      }\n\n      // Determine if this is an ECDSA signature (EOA) or smart wallet signature\n      // ECDSA signatures are exactly 65 bytes (130 hex chars without 0x)\n      const signatureLength = signature.startsWith(\"0x\") ? signature.length - 2 : signature.length;\n      const isECDSA = signatureLength === 130;\n\n      let tx: Hex;\n      if (isECDSA) {\n        // For EOA wallets, parse signature into v, r, s and use that overload\n        const parsedSig = parseSignature(signature);\n\n        tx = await this.signer.writeContract({\n          address: getAddress(requirements.asset),\n          abi: eip3009ABI,\n          functionName: \"transferWithAuthorization\",\n          args: [\n            getAddress(exactEvmPayload.authorization.from),\n            getAddress(exactEvmPayload.authorization.to),\n            BigInt(exactEvmPayload.authorization.value),\n            BigInt(exactEvmPayload.authorization.validAfter),\n            BigInt(exactEvmPayload.authorization.validBefore),\n            exactEvmPayload.authorization.nonce,\n            (parsedSig.v as number | undefined) || parsedSig.yParity,\n            parsedSig.r,\n            parsedSig.s,\n          ],\n        });\n      } else {\n        // For smart wallets, use the bytes signature overload\n        // The signature contains WebAuthn/P256 or other ERC-1271 compatible signature data\n        tx = await this.signer.writeContract({\n          address: getAddress(requirements.asset),\n          abi: eip3009ABI,\n          functionName: \"transferWithAuthorization\",\n          args: [\n            getAddress(exactEvmPayload.authorization.from),\n            getAddress(exactEvmPayload.authorization.to),\n            BigInt(exactEvmPayload.authorization.value),\n            BigInt(exactEvmPayload.authorization.validAfter),\n            BigInt(exactEvmPayload.authorization.validBefore),\n            exactEvmPayload.authorization.nonce,\n            signature,\n          ],\n        });\n      }\n\n      // Wait for transaction confirmation\n      const receipt = await this.signer.waitForTransactionReceipt({ hash: tx });\n\n      if (receipt.status !== \"success\") {\n        return {\n          success: false,\n          errorReason: \"invalid_transaction_state\",\n          transaction: tx,\n          network: payloadV1.network,\n          payer: exactEvmPayload.authorization.from,\n        };\n      }\n\n      return {\n        success: true,\n        transaction: tx,\n        network: payloadV1.network,\n        payer: exactEvmPayload.authorization.from,\n      };\n    } catch (error) {\n      console.error(\"Failed to settle transaction:\", error);\n      return {\n        success: false,\n        errorReason: \"transaction_failed\",\n        transaction: \"\",\n        network: payloadV1.network,\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n  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dist/esm/exact/client/index.d.mts

@@ -1,3 +0,3 @@
-export { ExactEvmScheme } from '../../index.mjs';
-import { x402Client, SelectPaymentRequirements, PaymentPolicy } from '@x402/core/client';
+export { E as ExactEvmScheme, P as Permit2AllowanceParams, c as createPermit2ApprovalTx, e as erc20AllowanceAbi, g as getPermit2AllowanceReadParams } from '../../permit2-BsAoJiWD.mjs';
+import { SelectPaymentRequirements, PaymentPolicy, x402Client } from '@x402/core/client';
 import { Network } from '@x402/core/types';
@@ -4,0 +4,0 @@ import { C as ClientEvmSigner } from '../../signer-5OVDxViv.mjs';

dist/esm/exact/client/index.mjs

 import {
-  ExactEvmScheme
-} from "../../chunk-FOUXRQAV.mjs";
-import {
-  NETWORKS
-} from "../../chunk-QLXM7BIB.mjs";
-import {
-  ExactEvmSchemeV1
-} from "../../chunk-PSA4YVU2.mjs";
-import "../../chunk-JYZWCLMP.mjs";
-import "../../chunk-ZYXTTU74.mjs";
-
-// src/exact/client/register.ts
-function registerExactEvmScheme(client, config) {
-  if (config.networks && config.networks.length > 0) {
-    config.networks.forEach((network) => {
-      client.register(network, new ExactEvmScheme(config.signer));
-    });
-  } else {
-    client.register("eip155:*", new ExactEvmScheme(config.signer));
-  }
-  NETWORKS.forEach((network) => {
-    client.registerV1(network, new ExactEvmSchemeV1(config.signer));
-  });
-  if (config.policies) {
-    config.policies.forEach((policy) => {
-      client.registerPolicy(policy);
-    });
-  }
-  return client;
-}
+  ExactEvmScheme,
+  createPermit2ApprovalTx,
+  erc20AllowanceAbi,
+  getPermit2AllowanceReadParams,
+  registerExactEvmScheme
+} from "../../chunk-U4H6Q62Q.mjs";
+import "../../chunk-DSSJHWGT.mjs";
 export {
   ExactEvmScheme,
+  createPermit2ApprovalTx,
+  erc20AllowanceAbi,
+  getPermit2AllowanceReadParams,
   registerExactEvmScheme
 };
 //# sourceMappingURL=index.mjs.map

dist/esm/exact/client/index.mjs.map

@@ -1,1 +0,1 @@
-{"version":3,"sources":["../../../../src/exact/client/register.ts"],"sourcesContent":["import { x402Client, SelectPaymentRequirements, PaymentPolicy } from \"@x402/core/client\";\nimport { Network } from \"@x402/core/types\";\nimport { ClientEvmSigner } from \"../../signer\";\nimport { ExactEvmScheme } from \"./scheme\";\nimport { ExactEvmSchemeV1 } from \"../v1/client/scheme\";\nimport { NETWORKS } from \"../../v1\";\n\n/**\n * Configuration options for registering EVM schemes to an x402Client\n */\nexport interface EvmClientConfig {\n  /**\n   * The EVM signer to use for creating payment payloads\n   */\n  signer: ClientEvmSigner;\n\n  /**\n   * Optional payment requirements selector function\n   * If not provided, uses the default selector (first available option)\n   */\n  paymentRequirementsSelector?: SelectPaymentRequirements;\n\n  /**\n   * Optional policies to apply to the client\n   */\n  policies?: PaymentPolicy[];\n\n  /**\n   * Optional specific networks to register\n   * If not provided, registers wildcard support (eip155:*)\n   */\n  networks?: Network[];\n}\n\n/**\n * Registers EVM exact payment schemes to an x402Client instance.\n *\n * This function registers:\n * - V2: eip155:* wildcard scheme with ExactEvmScheme (or specific networks if provided)\n * - V1: All supported EVM networks with ExactEvmSchemeV1\n *\n * @param client - The x402Client instance to register schemes to\n * @param config - Configuration for EVM client registration\n * @returns The client instance for chaining\n *\n * @example\n * ```typescript\n * import { registerExactEvmScheme } from \"@x402/evm/exact/client/register\";\n * import { x402Client } from \"@x402/core/client\";\n * import { privateKeyToAccount } from \"viem/accounts\";\n *\n * const account = privateKeyToAccount(\"0x...\");\n * const client = new x402Client();\n * registerExactEvmScheme(client, { signer: account });\n * ```\n */\nexport function registerExactEvmScheme(client: x402Client, config: EvmClientConfig): x402Client {\n  // Register V2 scheme\n  if (config.networks && config.networks.length > 0) {\n    // Register specific networks\n    config.networks.forEach(network => {\n      client.register(network, new ExactEvmScheme(config.signer));\n    });\n  } else {\n    // Register wildcard for all EVM chains\n    client.register(\"eip155:*\", new ExactEvmScheme(config.signer));\n  }\n\n  // Register all V1 networks\n  NETWORKS.forEach(network => {\n    client.registerV1(network as Network, new ExactEvmSchemeV1(config.signer));\n  });\n\n  // Apply policies if provided\n  if (config.policies) {\n    config.policies.forEach(policy => {\n      client.registerPolicy(policy);\n    });\n  }\n\n  return client;\n}\n"],"mappings":";;;;;;;;;;;;;AAwDO,SAAS,uBAAuB,QAAoB,QAAqC;AAE9F,MAAI,OAAO,YAAY,OAAO,SAAS,SAAS,GAAG;AAEjD,WAAO,SAAS,QAAQ,aAAW;AACjC,aAAO,SAAS,SAAS,IAAI,eAAe,OAAO,MAAM,CAAC;AAAA,IAC5D,CAAC;AAAA,EACH,OAAO;AAEL,WAAO,SAAS,YAAY,IAAI,eAAe,OAAO,MAAM,CAAC;AAAA,EAC/D;AAGA,WAAS,QAAQ,aAAW;AAC1B,WAAO,WAAW,SAAoB,IAAI,iBAAiB,OAAO,MAAM,CAAC;AAAA,EAC3E,CAAC;AAGD,MAAI,OAAO,UAAU;AACnB,WAAO,SAAS,QAAQ,YAAU;AAChC,aAAO,eAAe,MAAM;AAAA,IAC9B,CAAC;AAAA,EACH;AAEA,SAAO;AACT;","names":[]}
+{"version":3,"sources":[],"sourcesContent":[],"mappings":"","names":[]}

dist/esm/exact/facilitator/index.d.mts

@@ -16,2 +16,3 @@ import { SchemeNetworkFacilitator, PaymentPayload, PaymentRequirements, VerifyResponse, SettleResponse, Network } from '@x402/core/types';
  * EVM facilitator implementation for the Exact payment scheme.
+ * Routes between EIP-3009 and Permit2 based on payload type.
  */
@@ -48,2 +49,3 @@ declare class ExactEvmScheme implements SchemeNetworkFacilitator {
      * Verifies a payment payload.
+     * Routes to the appropriate verification logic based on payload type.
      *
@@ -57,2 +59,3 @@ * @param payload - The payment payload to verify
      * Settles a payment by executing the transfer.
+     * Routes to the appropriate settlement logic based on payload type.
      *
@@ -59,0 +62,0 @@ * @param payload - The payment payload to settle

dist/esm/exact/facilitator/index.mjs

 import {
-  NETWORKS
-} from "../../chunk-QLXM7BIB.mjs";
-import "../../chunk-PSA4YVU2.mjs";
+  isPermit2Payload
+} from "../../chunk-PFULIQAE.mjs";
 import {
-  ExactEvmSchemeV1
-} from "../../chunk-JYZWCLMP.mjs";
-import {
+  ExactEvmSchemeV12 as ExactEvmSchemeV1,
+  NETWORKS,
+  PERMIT2_ADDRESS,
   authorizationTypes,
-  eip3009ABI
-} from "../../chunk-ZYXTTU74.mjs";
+  eip3009ABI,
+  permit2WitnessTypes,
+  x402ExactPermit2ProxyABI,
+  x402ExactPermit2ProxyAddress
+} from "../../chunk-DSSJHWGT.mjs";
 
+// src/exact/facilitator/eip3009.ts
+import { getAddress, isAddressEqual, parseErc6492Signature, parseSignature } from "viem";
+async function verifyEIP3009(signer, payload, requirements, eip3009Payload) {
+  const payer = eip3009Payload.authorization.from;
+  if (payload.accepted.scheme !== "exact" || requirements.scheme !== "exact") {
+    return {
+      isValid: false,
+      invalidReason: "unsupported_scheme",
+      payer
+    };
+  }
+  if (!requirements.extra?.name || !requirements.extra?.version) {
+    return {
+      isValid: false,
+      invalidReason: "missing_eip712_domain",
+      payer
+    };
+  }
+  const { name, version } = requirements.extra;
+  const erc20Address = getAddress(requirements.asset);
+  if (payload.accepted.network !== requirements.network) {
+    return {
+      isValid: false,
+      invalidReason: "network_mismatch",
+      payer
+    };
+  }
+  const permitTypedData = {
+    types: authorizationTypes,
+    primaryType: "TransferWithAuthorization",
+    domain: {
+      name,
+      version,
+      chainId: parseInt(requirements.network.split(":")[1]),
+      verifyingContract: erc20Address
+    },
+    message: {
+      from: eip3009Payload.authorization.from,
+      to: eip3009Payload.authorization.to,
+      value: BigInt(eip3009Payload.authorization.value),
+      validAfter: BigInt(eip3009Payload.authorization.validAfter),
+      validBefore: BigInt(eip3009Payload.authorization.validBefore),
+      nonce: eip3009Payload.authorization.nonce
+    }
+  };
+  try {
+    const recoveredAddress = await signer.verifyTypedData({
+      address: eip3009Payload.authorization.from,
+      ...permitTypedData,
+      signature: eip3009Payload.signature
+    });
+    if (!recoveredAddress) {
+      return {
+        isValid: false,
+        invalidReason: "invalid_exact_evm_payload_signature",
+        payer
+      };
+    }
+  } catch {
+    const signature = eip3009Payload.signature;
+    const signatureLength = signature.startsWith("0x") ? signature.length - 2 : signature.length;
+    const isSmartWallet = signatureLength > 130;
+    if (isSmartWallet) {
+      const payerAddress = eip3009Payload.authorization.from;
+      const bytecode = await signer.getCode({ address: payerAddress });
+      if (!bytecode || bytecode === "0x") {
+        const erc6492Data = parseErc6492Signature(signature);
+        const hasDeploymentInfo = erc6492Data.address && erc6492Data.data && !isAddressEqual(erc6492Data.address, "0x0000000000000000000000000000000000000000");
+        if (!hasDeploymentInfo) {
+          return {
+            isValid: false,
+            invalidReason: "invalid_exact_evm_payload_undeployed_smart_wallet",
+            payer: payerAddress
+          };
+        }
+      } else {
+        return {
+          isValid: false,
+          invalidReason: "invalid_exact_evm_payload_signature",
+          payer
+        };
+      }
+    } else {
+      return {
+        isValid: false,
+        invalidReason: "invalid_exact_evm_payload_signature",
+        payer
+      };
+    }
+  }
+  if (getAddress(eip3009Payload.authorization.to) !== getAddress(requirements.payTo)) {
+    return {
+      isValid: false,
+      invalidReason: "invalid_exact_evm_payload_recipient_mismatch",
+      payer
+    };
+  }
+  const now = Math.floor(Date.now() / 1e3);
+  if (BigInt(eip3009Payload.authorization.validBefore) < BigInt(now + 6)) {
+    return {
+      isValid: false,
+      invalidReason: "invalid_exact_evm_payload_authorization_valid_before",
+      payer
+    };
+  }
+  if (BigInt(eip3009Payload.authorization.validAfter) > BigInt(now)) {
+    return {
+      isValid: false,
+      invalidReason: "invalid_exact_evm_payload_authorization_valid_after",
+      payer
+    };
+  }
+  try {
+    const balance = await signer.readContract({
+      address: erc20Address,
+      abi: eip3009ABI,
+      functionName: "balanceOf",
+      args: [eip3009Payload.authorization.from]
+    });
+    if (BigInt(balance) < BigInt(requirements.amount)) {
+      return {
+        isValid: false,
+        invalidReason: "insufficient_funds",
+        invalidMessage: `Insufficient funds to complete the payment. Required: ${requirements.amount} ${requirements.asset}, Available: ${balance.toString()} ${requirements.asset}. Please add funds to your wallet and try again.`,
+        payer
+      };
+    }
+  } catch {
+  }
+  if (BigInt(eip3009Payload.authorization.value) < BigInt(requirements.amount)) {
+    return {
+      isValid: false,
+      invalidReason: "invalid_exact_evm_payload_authorization_value",
+      payer
+    };
+  }
+  return {
+    isValid: true,
+    invalidReason: void 0,
+    payer
+  };
+}
+async function settleEIP3009(signer, payload, requirements, eip3009Payload, config) {
+  const payer = eip3009Payload.authorization.from;
+  const valid = await verifyEIP3009(signer, payload, requirements, eip3009Payload);
+  if (!valid.isValid) {
+    return {
+      success: false,
+      network: payload.accepted.network,
+      transaction: "",
+      errorReason: valid.invalidReason ?? "invalid_scheme",
+      payer
+    };
+  }
+  try {
+    const parseResult = parseErc6492Signature(eip3009Payload.signature);
+    const { signature, address: factoryAddress, data: factoryCalldata } = parseResult;
+    if (config.deployERC4337WithEIP6492 && factoryAddress && factoryCalldata && !isAddressEqual(factoryAddress, "0x0000000000000000000000000000000000000000")) {
+      const bytecode = await signer.getCode({ address: payer });
+      if (!bytecode || bytecode === "0x") {
+        const deployTx = await signer.sendTransaction({
+          to: factoryAddress,
+          data: factoryCalldata
+        });
+        await signer.waitForTransactionReceipt({ hash: deployTx });
+      }
+    }
+    const signatureLength = signature.startsWith("0x") ? signature.length - 2 : signature.length;
+    const isECDSA = signatureLength === 130;
+    let tx;
+    if (isECDSA) {
+      const parsedSig = parseSignature(signature);
+      tx = await signer.writeContract({
+        address: getAddress(requirements.asset),
+        abi: eip3009ABI,
+        functionName: "transferWithAuthorization",
+        args: [
+          getAddress(eip3009Payload.authorization.from),
+          getAddress(eip3009Payload.authorization.to),
+          BigInt(eip3009Payload.authorization.value),
+          BigInt(eip3009Payload.authorization.validAfter),
+          BigInt(eip3009Payload.authorization.validBefore),
+          eip3009Payload.authorization.nonce,
+          parsedSig.v || parsedSig.yParity,
+          parsedSig.r,
+          parsedSig.s
+        ]
+      });
+    } else {
+      tx = await signer.writeContract({
+        address: getAddress(requirements.asset),
+        abi: eip3009ABI,
+        functionName: "transferWithAuthorization",
+        args: [
+          getAddress(eip3009Payload.authorization.from),
+          getAddress(eip3009Payload.authorization.to),
+          BigInt(eip3009Payload.authorization.value),
+          BigInt(eip3009Payload.authorization.validAfter),
+          BigInt(eip3009Payload.authorization.validBefore),
+          eip3009Payload.authorization.nonce,
+          signature
+        ]
+      });
+    }
+    const receipt = await signer.waitForTransactionReceipt({ hash: tx });
+    if (receipt.status !== "success") {
+      return {
+        success: false,
+        errorReason: "invalid_transaction_state",
+        transaction: tx,
+        network: payload.accepted.network,
+        payer
+      };
+    }
+    return {
+      success: true,
+      transaction: tx,
+      network: payload.accepted.network,
+      payer
+    };
+  } catch {
+    return {
+      success: false,
+      errorReason: "transaction_failed",
+      transaction: "",
+      network: payload.accepted.network,
+      payer
+    };
+  }
+}
+
+// src/exact/facilitator/permit2.ts
+import { getAddress as getAddress2 } from "viem";
+var erc20AllowanceABI = [
+  {
+    type: "function",
+    name: "allowance",
+    inputs: [
+      { name: "owner", type: "address" },
+      { name: "spender", type: "address" }
+    ],
+    outputs: [{ type: "uint256" }],
+    stateMutability: "view"
+  }
+];
+async function verifyPermit2(signer, payload, requirements, permit2Payload) {
+  const payer = permit2Payload.permit2Authorization.from;
+  if (payload.accepted.scheme !== "exact" || requirements.scheme !== "exact") {
+    return {
+      isValid: false,
+      invalidReason: "unsupported_scheme",
+      payer
+    };
+  }
+  if (payload.accepted.network !== requirements.network) {
+    return {
+      isValid: false,
+      invalidReason: "network_mismatch",
+      payer
+    };
+  }
+  const chainId = parseInt(requirements.network.split(":")[1]);
+  const tokenAddress = getAddress2(requirements.asset);
+  if (getAddress2(permit2Payload.permit2Authorization.spender) !== getAddress2(x402ExactPermit2ProxyAddress)) {
+    return {
+      isValid: false,
+      invalidReason: "invalid_permit2_spender",
+      payer
+    };
+  }
+  if (getAddress2(permit2Payload.permit2Authorization.witness.to) !== getAddress2(requirements.payTo)) {
+    return {
+      isValid: false,
+      invalidReason: "invalid_permit2_recipient_mismatch",
+      payer
+    };
+  }
+  const now = Math.floor(Date.now() / 1e3);
+  if (BigInt(permit2Payload.permit2Authorization.deadline) < BigInt(now + 6)) {
+    return {
+      isValid: false,
+      invalidReason: "permit2_deadline_expired",
+      payer
+    };
+  }
+  if (BigInt(permit2Payload.permit2Authorization.witness.validAfter) > BigInt(now)) {
+    return {
+      isValid: false,
+      invalidReason: "permit2_not_yet_valid",
+      payer
+    };
+  }
+  if (BigInt(permit2Payload.permit2Authorization.permitted.amount) < BigInt(requirements.amount)) {
+    return {
+      isValid: false,
+      invalidReason: "permit2_insufficient_amount",
+      payer
+    };
+  }
+  if (getAddress2(permit2Payload.permit2Authorization.permitted.token) !== tokenAddress) {
+    return {
+      isValid: false,
+      invalidReason: "permit2_token_mismatch",
+      payer
+    };
+  }
+  const permit2TypedData = {
+    types: permit2WitnessTypes,
+    primaryType: "PermitWitnessTransferFrom",
+    domain: {
+      name: "Permit2",
+      chainId,
+      verifyingContract: PERMIT2_ADDRESS
+    },
+    message: {
+      permitted: {
+        token: getAddress2(permit2Payload.permit2Authorization.permitted.token),
+        amount: BigInt(permit2Payload.permit2Authorization.permitted.amount)
+      },
+      spender: getAddress2(permit2Payload.permit2Authorization.spender),
+      nonce: BigInt(permit2Payload.permit2Authorization.nonce),
+      deadline: BigInt(permit2Payload.permit2Authorization.deadline),
+      witness: {
+        to: getAddress2(permit2Payload.permit2Authorization.witness.to),
+        validAfter: BigInt(permit2Payload.permit2Authorization.witness.validAfter),
+        extra: permit2Payload.permit2Authorization.witness.extra
+      }
+    }
+  };
+  try {
+    const isValid = await signer.verifyTypedData({
+      address: payer,
+      ...permit2TypedData,
+      signature: permit2Payload.signature
+    });
+    if (!isValid) {
+      return {
+        isValid: false,
+        invalidReason: "invalid_permit2_signature",
+        payer
+      };
+    }
+  } catch {
+    return {
+      isValid: false,
+      invalidReason: "invalid_permit2_signature",
+      payer
+    };
+  }
+  try {
+    const allowance = await signer.readContract({
+      address: tokenAddress,
+      abi: erc20AllowanceABI,
+      functionName: "allowance",
+      args: [payer, PERMIT2_ADDRESS]
+    });
+    if (allowance < BigInt(requirements.amount)) {
+      return {
+        isValid: false,
+        invalidReason: "permit2_allowance_required",
+        payer
+      };
+    }
+  } catch {
+  }
+  try {
+    const balance = await signer.readContract({
+      address: tokenAddress,
+      abi: eip3009ABI,
+      functionName: "balanceOf",
+      args: [payer]
+    });
+    if (balance < BigInt(requirements.amount)) {
+      return {
+        isValid: false,
+        invalidReason: "insufficient_funds",
+        invalidMessage: `Insufficient funds to complete the payment. Required: ${requirements.amount} ${requirements.asset}, Available: ${balance.toString()} ${requirements.asset}. Please add funds to your wallet and try again.`,
+        payer
+      };
+    }
+  } catch {
+  }
+  return {
+    isValid: true,
+    invalidReason: void 0,
+    payer
+  };
+}
+async function settlePermit2(signer, payload, requirements, permit2Payload) {
+  const payer = permit2Payload.permit2Authorization.from;
+  const valid = await verifyPermit2(signer, payload, requirements, permit2Payload);
+  if (!valid.isValid) {
+    return {
+      success: false,
+      network: payload.accepted.network,
+      transaction: "",
+      errorReason: valid.invalidReason ?? "invalid_scheme",
+      payer
+    };
+  }
+  try {
+    const tx = await signer.writeContract({
+      address: x402ExactPermit2ProxyAddress,
+      abi: x402ExactPermit2ProxyABI,
+      functionName: "settle",
+      args: [
+        {
+          permitted: {
+            token: getAddress2(permit2Payload.permit2Authorization.permitted.token),
+            amount: BigInt(permit2Payload.permit2Authorization.permitted.amount)
+          },
+          nonce: BigInt(permit2Payload.permit2Authorization.nonce),
+          deadline: BigInt(permit2Payload.permit2Authorization.deadline)
+        },
+        getAddress2(payer),
+        {
+          to: getAddress2(permit2Payload.permit2Authorization.witness.to),
+          validAfter: BigInt(permit2Payload.permit2Authorization.witness.validAfter),
+          extra: permit2Payload.permit2Authorization.witness.extra
+        },
+        permit2Payload.signature
+      ]
+    });
+    const receipt = await signer.waitForTransactionReceipt({ hash: tx });
+    if (receipt.status !== "success") {
+      return {
+        success: false,
+        errorReason: "invalid_transaction_state",
+        transaction: tx,
+        network: payload.accepted.network,
+        payer
+      };
+    }
+    return {
+      success: true,
+      transaction: tx,
+      network: payload.accepted.network,
+      payer
+    };
+  } catch (error) {
+    let errorReason = "transaction_failed";
+    if (error instanceof Error) {
+      const message = error.message;
+      if (message.includes("AmountExceedsPermitted")) {
+        errorReason = "permit2_amount_exceeds_permitted";
+      } else if (message.includes("InvalidDestination")) {
+        errorReason = "permit2_invalid_destination";
+      } else if (message.includes("InvalidOwner")) {
+        errorReason = "permit2_invalid_owner";
+      } else if (message.includes("PaymentTooEarly")) {
+        errorReason = "permit2_payment_too_early";
+      } else if (message.includes("InvalidSignature") || message.includes("SignatureExpired")) {
+        errorReason = "permit2_invalid_signature";
+      } else if (message.includes("InvalidNonce")) {
+        errorReason = "permit2_invalid_nonce";
+      } else {
+        errorReason = `transaction_failed: ${message.slice(0, 500)}`;
+      }
+    }
+    return {
+      success: false,
+      errorReason,
+      transaction: "",
+      network: payload.accepted.network,
+      payer
+    };
+  }
+}
+
 // src/exact/facilitator/scheme.ts
-import { getAddress, isAddressEqual, parseErc6492Signature, parseSignature } from "viem";
 var ExactEvmScheme = class {
@@ -52,2 +522,3 @@ /**
    * Verifies a payment payload.
+   * Routes to the appropriate verification logic based on payload type.
    *
@@ -59,142 +530,12 @@ * @param payload - The payment payload to verify
   async verify(payload, requirements) {
-    const exactEvmPayload = payload.payload;
-    if (payload.accepted.scheme !== "exact" || requirements.scheme !== "exact") {
-      return {
-        isValid: false,
-        invalidReason: "unsupported_scheme",
-        payer: exactEvmPayload.authorization.from
-      };
+    const rawPayload = payload.payload;
+    if (isPermit2Payload(rawPayload)) {
+      return verifyPermit2(this.signer, payload, requirements, rawPayload);
     }
-    if (!requirements.extra?.name || !requirements.extra?.version) {
-      return {
-        isValid: false,
-        invalidReason: "missing_eip712_domain",
-        payer: exactEvmPayload.authorization.from
-      };
-    }
-    const { name, version } = requirements.extra;
-    const erc20Address = getAddress(requirements.asset);
-    if (payload.accepted.network !== requirements.network) {
-      return {
-        isValid: false,
-        invalidReason: "network_mismatch",
-        payer: exactEvmPayload.authorization.from
-      };
-    }
-    const permitTypedData = {
-      types: authorizationTypes,
-      primaryType: "TransferWithAuthorization",
-      domain: {
-        name,
-        version,
-        chainId: parseInt(requirements.network.split(":")[1]),
-        verifyingContract: erc20Address
-      },
-      message: {
-        from: exactEvmPayload.authorization.from,
-        to: exactEvmPayload.authorization.to,
-        value: BigInt(exactEvmPayload.authorization.value),
-        validAfter: BigInt(exactEvmPayload.authorization.validAfter),
-        validBefore: BigInt(exactEvmPayload.authorization.validBefore),
-        nonce: exactEvmPayload.authorization.nonce
-      }
-    };
-    try {
-      const recoveredAddress = await this.signer.verifyTypedData({
-        address: exactEvmPayload.authorization.from,
-        ...permitTypedData,
-        signature: exactEvmPayload.signature
-      });
-      if (!recoveredAddress) {
-        return {
-          isValid: false,
-          invalidReason: "invalid_exact_evm_payload_signature",
-          payer: exactEvmPayload.authorization.from
-        };
-      }
-    } catch {
-      const signature = exactEvmPayload.signature;
-      const signatureLength = signature.startsWith("0x") ? signature.length - 2 : signature.length;
-      const isSmartWallet = signatureLength > 130;
-      if (isSmartWallet) {
-        const payerAddress = exactEvmPayload.authorization.from;
-        const bytecode = await this.signer.getCode({ address: payerAddress });
-        if (!bytecode || bytecode === "0x") {
-          const erc6492Data = parseErc6492Signature(signature);
-          const hasDeploymentInfo = erc6492Data.address && erc6492Data.data && !isAddressEqual(erc6492Data.address, "0x0000000000000000000000000000000000000000");
-          if (!hasDeploymentInfo) {
-            return {
-              isValid: false,
-              invalidReason: "invalid_exact_evm_payload_undeployed_smart_wallet",
-              payer: payerAddress
-            };
-          }
-        } else {
-          return {
-            isValid: false,
-            invalidReason: "invalid_exact_evm_payload_signature",
-            payer: exactEvmPayload.authorization.from
-          };
-        }
-      } else {
-        return {
-          isValid: false,
-          invalidReason: "invalid_exact_evm_payload_signature",
-          payer: exactEvmPayload.authorization.from
-        };
-      }
-    }
-    if (getAddress(exactEvmPayload.authorization.to) !== getAddress(requirements.payTo)) {
-      return {
-        isValid: false,
-        invalidReason: "invalid_exact_evm_payload_recipient_mismatch",
-        payer: exactEvmPayload.authorization.from
-      };
-    }
-    const now = Math.floor(Date.now() / 1e3);
-    if (BigInt(exactEvmPayload.authorization.validBefore) < BigInt(now + 6)) {
-      return {
-        isValid: false,
-        invalidReason: "invalid_exact_evm_payload_authorization_valid_before",
-        payer: exactEvmPayload.authorization.from
-      };
-    }
-    if (BigInt(exactEvmPayload.authorization.validAfter) > BigInt(now)) {
-      return {
-        isValid: false,
-        invalidReason: "invalid_exact_evm_payload_authorization_valid_after",
-        payer: exactEvmPayload.authorization.from
-      };
-    }
-    try {
-      const balance = await this.signer.readContract({
-        address: erc20Address,
-        abi: eip3009ABI,
-        functionName: "balanceOf",
-        args: [exactEvmPayload.authorization.from]
-      });
-      if (BigInt(balance) < BigInt(requirements.amount)) {
-        return {
-          isValid: false,
-          invalidReason: "insufficient_funds",
-          payer: exactEvmPayload.authorization.from
-        };
-      }
-    } catch {
-    }
-    if (BigInt(exactEvmPayload.authorization.value) < BigInt(requirements.amount)) {
-      return {
-        isValid: false,
-        invalidReason: "invalid_exact_evm_payload_authorization_value",
-        payer: exactEvmPayload.authorization.from
-      };
-    }
-    return {
-      isValid: true,
-      invalidReason: void 0,
-      payer: exactEvmPayload.authorization.from
-    };
+    const eip3009Payload = rawPayload;
+    return verifyEIP3009(this.signer, payload, requirements, eip3009Payload);
   }
   /**
    * Settles a payment by executing the transfer.
+   * Routes to the appropriate settlement logic based on payload type.
    *
@@ -206,99 +547,8 @@ * @param payload - The payment payload to settle
   async settle(payload, requirements) {
-    const exactEvmPayload = payload.payload;
-    const valid = await this.verify(payload, requirements);
-    if (!valid.isValid) {
-      return {
-        success: false,
-        network: payload.accepted.network,
-        transaction: "",
-        errorReason: valid.invalidReason ?? "invalid_scheme",
-        payer: exactEvmPayload.authorization.from
-      };
+    const rawPayload = payload.payload;
+    if (isPermit2Payload(rawPayload)) {
+      return settlePermit2(this.signer, payload, requirements, rawPayload);
     }
-    try {
-      const parseResult = parseErc6492Signature(exactEvmPayload.signature);
-      const { signature, address: factoryAddress, data: factoryCalldata } = parseResult;
-      if (this.config.deployERC4337WithEIP6492 && factoryAddress && factoryCalldata && !isAddressEqual(factoryAddress, "0x0000000000000000000000000000000000000000")) {
-        const payerAddress = exactEvmPayload.authorization.from;
-        const bytecode = await this.signer.getCode({ address: payerAddress });
-        if (!bytecode || bytecode === "0x") {
-          try {
-            console.log(`Deploying ERC-4337 smart wallet for ${payerAddress} via EIP-6492`);
-            const deployTx = await this.signer.sendTransaction({
-              to: factoryAddress,
-              data: factoryCalldata
-            });
-            await this.signer.waitForTransactionReceipt({ hash: deployTx });
-            console.log(`Successfully deployed smart wallet for ${payerAddress}`);
-          } catch (deployError) {
-            console.error("Smart wallet deployment failed:", deployError);
-            throw deployError;
-          }
-        } else {
-          console.log(`Smart wallet for ${payerAddress} already deployed, skipping deployment`);
-        }
-      }
-      const signatureLength = signature.startsWith("0x") ? signature.length - 2 : signature.length;
-      const isECDSA = signatureLength === 130;
-      let tx;
-      if (isECDSA) {
-        const parsedSig = parseSignature(signature);
-        tx = await this.signer.writeContract({
-          address: getAddress(requirements.asset),
-          abi: eip3009ABI,
-          functionName: "transferWithAuthorization",
-          args: [
-            getAddress(exactEvmPayload.authorization.from),
-            getAddress(exactEvmPayload.authorization.to),
-            BigInt(exactEvmPayload.authorization.value),
-            BigInt(exactEvmPayload.authorization.validAfter),
-            BigInt(exactEvmPayload.authorization.validBefore),
-            exactEvmPayload.authorization.nonce,
-            parsedSig.v || parsedSig.yParity,
-            parsedSig.r,
-            parsedSig.s
-          ]
-        });
-      } else {
-        tx = await this.signer.writeContract({
-          address: getAddress(requirements.asset),
-          abi: eip3009ABI,
-          functionName: "transferWithAuthorization",
-          args: [
-            getAddress(exactEvmPayload.authorization.from),
-            getAddress(exactEvmPayload.authorization.to),
-            BigInt(exactEvmPayload.authorization.value),
-            BigInt(exactEvmPayload.authorization.validAfter),
-            BigInt(exactEvmPayload.authorization.validBefore),
-            exactEvmPayload.authorization.nonce,
-            signature
-          ]
-        });
-      }
-      const receipt = await this.signer.waitForTransactionReceipt({ hash: tx });
-      if (receipt.status !== "success") {
-        return {
-          success: false,
-          errorReason: "invalid_transaction_state",
-          transaction: tx,
-          network: payload.accepted.network,
-          payer: exactEvmPayload.authorization.from
-        };
-      }
-      return {
-        success: true,
-        transaction: tx,
-        network: payload.accepted.network,
-        payer: exactEvmPayload.authorization.from
-      };
-    } catch (error) {
-      console.error("Failed to settle transaction:", error);
-      return {
-        success: false,
-        errorReason: "transaction_failed",
-        transaction: "",
-        network: payload.accepted.network,
-        payer: exactEvmPayload.authorization.from
-      };
-    }
+    const eip3009Payload = rawPayload;
+    return settleEIP3009(this.signer, payload, requirements, eip3009Payload, this.config);
   }
@@ -305,0 +555,0 @@ };

dist/esm/exact/facilitator/index.mjs.map

@@ -1,1 +0,1 @@
-{"version":3,"sources":["../../../../src/exact/facilitator/scheme.ts","../../../../src/exact/facilitator/register.ts"],"sourcesContent":["import {\n  PaymentPayload,\n  PaymentRequirements,\n  SchemeNetworkFacilitator,\n  SettleResponse,\n  VerifyResponse,\n} from \"@x402/core/types\";\nimport { getAddress, Hex, isAddressEqual, parseErc6492Signature, parseSignature } from \"viem\";\nimport { authorizationTypes, eip3009ABI } from \"../../constants\";\nimport { FacilitatorEvmSigner } from \"../../signer\";\nimport { ExactEvmPayloadV2 } from \"../../types\";\n\nexport interface ExactEvmSchemeConfig {\n  /**\n   * If enabled, the facilitator will deploy ERC-4337 smart wallets\n   * via EIP-6492 when encountering undeployed contract signatures.\n   *\n   * @default false\n   */\n  deployERC4337WithEIP6492?: boolean;\n}\n\n/**\n * EVM facilitator implementation for the Exact payment scheme.\n */\nexport class ExactEvmScheme implements SchemeNetworkFacilitator {\n  readonly scheme = \"exact\";\n  readonly caipFamily = \"eip155:*\";\n  private readonly config: Required<ExactEvmSchemeConfig>;\n\n  /**\n   * Creates a new ExactEvmFacilitator instance.\n   *\n   * @param signer - The EVM signer for facilitator operations\n   * @param config - Optional configuration for the facilitator\n   */\n  constructor(\n    private readonly signer: FacilitatorEvmSigner,\n    config?: ExactEvmSchemeConfig,\n  ) {\n    this.config = {\n      deployERC4337WithEIP6492: config?.deployERC4337WithEIP6492 ?? false,\n    };\n  }\n\n  /**\n   * Get mechanism-specific extra data for the supported kinds endpoint.\n   * For EVM, no extra data is needed.\n   *\n   * @param _ - The network identifier (unused for EVM)\n   * @returns undefined (EVM has no extra data)\n   */\n  getExtra(_: string): Record<string, unknown> | undefined {\n    return undefined;\n  }\n\n  /**\n   * Get signer addresses used by this facilitator.\n   * Returns all addresses this facilitator can use for signing/settling transactions.\n   *\n   * @param _ - The network identifier (unused for EVM, addresses are network-agnostic)\n   * @returns Array of facilitator wallet addresses\n   */\n  getSigners(_: string): string[] {\n    return [...this.signer.getAddresses()];\n  }\n\n  /**\n   * Verifies a payment payload.\n   *\n   * @param payload - The payment payload to verify\n   * @param requirements - The payment requirements\n   * @returns Promise resolving to verification response\n   */\n  async verify(\n    payload: PaymentPayload,\n    requirements: PaymentRequirements,\n  ): Promise<VerifyResponse> {\n    const exactEvmPayload = payload.payload as ExactEvmPayloadV2;\n\n    // Verify scheme matches\n    if (payload.accepted.scheme !== \"exact\" || requirements.scheme !== \"exact\") {\n      return {\n        isValid: false,\n        invalidReason: \"unsupported_scheme\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Get chain configuration\n    if (!requirements.extra?.name || !requirements.extra?.version) {\n      return {\n        isValid: false,\n        invalidReason: \"missing_eip712_domain\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    const { name, version } = requirements.extra;\n    const erc20Address = getAddress(requirements.asset);\n\n    // Verify network matches\n    if (payload.accepted.network !== requirements.network) {\n      return {\n        isValid: false,\n        invalidReason: \"network_mismatch\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Build typed data for signature verification\n    const permitTypedData = {\n      types: authorizationTypes,\n      primaryType: \"TransferWithAuthorization\" as const,\n      domain: {\n        name,\n        version,\n        chainId: parseInt(requirements.network.split(\":\")[1]),\n        verifyingContract: erc20Address,\n      },\n      message: {\n        from: exactEvmPayload.authorization.from,\n        to: exactEvmPayload.authorization.to,\n        value: BigInt(exactEvmPayload.authorization.value),\n        validAfter: BigInt(exactEvmPayload.authorization.validAfter),\n        validBefore: BigInt(exactEvmPayload.authorization.validBefore),\n        nonce: exactEvmPayload.authorization.nonce,\n      },\n    };\n\n    // Verify signature\n    try {\n      const recoveredAddress = await this.signer.verifyTypedData({\n        address: exactEvmPayload.authorization.from,\n        ...permitTypedData,\n        signature: exactEvmPayload.signature!,\n      });\n\n      if (!recoveredAddress) {\n        return {\n          isValid: false,\n          invalidReason: \"invalid_exact_evm_payload_signature\",\n          payer: exactEvmPayload.authorization.from,\n        };\n      }\n    } catch {\n      // Signature verification failed - could be an undeployed smart wallet\n      // Check if smart wallet is deployed\n      const signature = exactEvmPayload.signature!;\n      const signatureLength = signature.startsWith(\"0x\") ? signature.length - 2 : signature.length;\n      const isSmartWallet = signatureLength > 130; // 65 bytes = 130 hex chars for EOA\n\n      if (isSmartWallet) {\n        const payerAddress = exactEvmPayload.authorization.from;\n        const bytecode = await this.signer.getCode({ address: payerAddress });\n\n        if (!bytecode || bytecode === \"0x\") {\n          // Wallet is not deployed. Check if it's EIP-6492 with deployment info.\n          // EIP-6492 signatures contain factory address and calldata needed for deployment.\n          // Non-EIP-6492 undeployed wallets cannot succeed (no way to deploy them).\n          const erc6492Data = parseErc6492Signature(signature);\n          const hasDeploymentInfo =\n            erc6492Data.address &&\n            erc6492Data.data &&\n            !isAddressEqual(erc6492Data.address, \"0x0000000000000000000000000000000000000000\");\n\n          if (!hasDeploymentInfo) {\n            // Non-EIP-6492 undeployed smart wallet - will always fail at settlement\n            // since EIP-3009 requires on-chain EIP-1271 validation\n            return {\n              isValid: false,\n              invalidReason: \"invalid_exact_evm_payload_undeployed_smart_wallet\",\n              payer: payerAddress,\n            };\n          }\n          // EIP-6492 signature with deployment info - allow through\n          // Facilitators with sponsored deployment support can handle this in settle()\n        } else {\n          // Wallet is deployed but signature still failed - invalid signature\n          return {\n            isValid: false,\n            invalidReason: \"invalid_exact_evm_payload_signature\",\n            payer: exactEvmPayload.authorization.from,\n          };\n        }\n      } else {\n        // EOA signature failed\n        return {\n          isValid: false,\n          invalidReason: \"invalid_exact_evm_payload_signature\",\n          payer: exactEvmPayload.authorization.from,\n        };\n      }\n    }\n\n    // Verify payment recipient matches\n    if (getAddress(exactEvmPayload.authorization.to) !== getAddress(requirements.payTo)) {\n      return {\n        isValid: false,\n        invalidReason: \"invalid_exact_evm_payload_recipient_mismatch\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Verify validBefore is in the future (with 6 second buffer for block time)\n    const now = Math.floor(Date.now() / 1000);\n    if (BigInt(exactEvmPayload.authorization.validBefore) < BigInt(now + 6)) {\n      return {\n        isValid: false,\n        invalidReason: \"invalid_exact_evm_payload_authorization_valid_before\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Verify validAfter is not in the future\n    if (BigInt(exactEvmPayload.authorization.validAfter) > BigInt(now)) {\n      return {\n        isValid: false,\n        invalidReason: \"invalid_exact_evm_payload_authorization_valid_after\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Check balance\n    try {\n      const balance = (await this.signer.readContract({\n        address: erc20Address,\n        abi: eip3009ABI,\n        functionName: \"balanceOf\",\n        args: [exactEvmPayload.authorization.from],\n      })) as bigint;\n\n      if (BigInt(balance) < BigInt(requirements.amount)) {\n        return {\n          isValid: false,\n          invalidReason: \"insufficient_funds\",\n          payer: exactEvmPayload.authorization.from,\n        };\n      }\n    } catch {\n      // If we can't check balance, continue with other validations\n    }\n\n    // Verify amount is sufficient\n    if (BigInt(exactEvmPayload.authorization.value) < BigInt(requirements.amount)) {\n      return {\n        isValid: false,\n        invalidReason: \"invalid_exact_evm_payload_authorization_value\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    return {\n      isValid: true,\n      invalidReason: undefined,\n      payer: exactEvmPayload.authorization.from,\n    };\n  }\n\n  /**\n   * Settles a payment by executing the transfer.\n   *\n   * @param payload - The payment payload to settle\n   * @param requirements - The payment requirements\n   * @returns Promise resolving to settlement response\n   */\n  async settle(\n    payload: PaymentPayload,\n    requirements: PaymentRequirements,\n  ): Promise<SettleResponse> {\n    const exactEvmPayload = payload.payload as ExactEvmPayloadV2;\n\n    // Re-verify before settling\n    const valid = await this.verify(payload, requirements);\n    if (!valid.isValid) {\n      return {\n        success: false,\n        network: payload.accepted.network,\n        transaction: \"\",\n        errorReason: valid.invalidReason ?? \"invalid_scheme\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    try {\n      // Parse ERC-6492 signature if applicable\n      const parseResult = parseErc6492Signature(exactEvmPayload.signature!);\n      const { signature, address: factoryAddress, data: factoryCalldata } = parseResult;\n\n      // Deploy ERC-4337 smart wallet via EIP-6492 if configured and needed\n      if (\n        this.config.deployERC4337WithEIP6492 &&\n        factoryAddress &&\n        factoryCalldata &&\n        !isAddressEqual(factoryAddress, \"0x0000000000000000000000000000000000000000\")\n      ) {\n        // Check if smart wallet is already deployed\n        const payerAddress = exactEvmPayload.authorization.from;\n        const bytecode = await this.signer.getCode({ address: payerAddress });\n\n        if (!bytecode || bytecode === \"0x\") {\n          // Wallet not deployed - attempt deployment\n          try {\n            console.log(`Deploying ERC-4337 smart wallet for ${payerAddress} via EIP-6492`);\n\n            // Send the factory calldata directly as a transaction\n            // The factoryCalldata already contains the complete encoded function call\n            const deployTx = await this.signer.sendTransaction({\n              to: factoryAddress as Hex,\n              data: factoryCalldata as Hex,\n            });\n\n            // Wait for deployment transaction\n            await this.signer.waitForTransactionReceipt({ hash: deployTx });\n            console.log(`Successfully deployed smart wallet for ${payerAddress}`);\n          } catch (deployError) {\n            console.error(\"Smart wallet deployment failed:\", deployError);\n            // Deployment failed - cannot proceed\n            throw deployError;\n          }\n        } else {\n          console.log(`Smart wallet for ${payerAddress} already deployed, skipping deployment`);\n        }\n      }\n\n      // Determine if this is an ECDSA signature (EOA) or smart wallet signature\n      // ECDSA signatures are exactly 65 bytes (130 hex chars without 0x)\n      const signatureLength = signature.startsWith(\"0x\") ? signature.length - 2 : signature.length;\n      const isECDSA = signatureLength === 130;\n\n      let tx: Hex;\n      if (isECDSA) {\n        // For EOA wallets, parse signature into v, r, s and use that overload\n        const parsedSig = parseSignature(signature);\n\n        tx = await this.signer.writeContract({\n          address: getAddress(requirements.asset),\n          abi: eip3009ABI,\n          functionName: \"transferWithAuthorization\",\n          args: [\n            getAddress(exactEvmPayload.authorization.from),\n            getAddress(exactEvmPayload.authorization.to),\n            BigInt(exactEvmPayload.authorization.value),\n            BigInt(exactEvmPayload.authorization.validAfter),\n            BigInt(exactEvmPayload.authorization.validBefore),\n            exactEvmPayload.authorization.nonce,\n            (parsedSig.v as number | undefined) || parsedSig.yParity,\n            parsedSig.r,\n            parsedSig.s,\n          ],\n        });\n      } else {\n        // For smart wallets, use the bytes signature overload\n        // The signature contains WebAuthn/P256 or other ERC-1271 compatible signature data\n        tx = await this.signer.writeContract({\n          address: getAddress(requirements.asset),\n          abi: eip3009ABI,\n          functionName: \"transferWithAuthorization\",\n          args: [\n            getAddress(exactEvmPayload.authorization.from),\n            getAddress(exactEvmPayload.authorization.to),\n            BigInt(exactEvmPayload.authorization.value),\n            BigInt(exactEvmPayload.authorization.validAfter),\n            BigInt(exactEvmPayload.authorization.validBefore),\n            exactEvmPayload.authorization.nonce,\n            signature,\n          ],\n        });\n      }\n\n      // Wait for transaction confirmation\n      const receipt = await this.signer.waitForTransactionReceipt({ hash: tx });\n\n      if (receipt.status !== \"success\") {\n        return {\n          success: false,\n          errorReason: \"invalid_transaction_state\",\n          transaction: tx,\n          network: payload.accepted.network,\n          payer: exactEvmPayload.authorization.from,\n        };\n      }\n\n      return {\n        success: true,\n        transaction: tx,\n        network: payload.accepted.network,\n        payer: exactEvmPayload.authorization.from,\n      };\n    } catch (error) {\n      console.error(\"Failed to settle transaction:\", error);\n      return {\n        success: false,\n        errorReason: \"transaction_failed\",\n        transaction: \"\",\n        network: payload.accepted.network,\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n  }\n}\n","import { x402Facilitator } from \"@x402/core/facilitator\";\nimport { Network } from \"@x402/core/types\";\nimport { FacilitatorEvmSigner } from \"../../signer\";\nimport { ExactEvmScheme } from \"./scheme\";\nimport { ExactEvmSchemeV1 } from \"../v1/facilitator/scheme\";\nimport { NETWORKS } from \"../../v1\";\n\n/**\n * Configuration options for registering EVM schemes to an x402Facilitator\n */\nexport interface EvmFacilitatorConfig {\n  /**\n   * The EVM signer for facilitator operations (verify and settle)\n   */\n  signer: FacilitatorEvmSigner;\n\n  /**\n   * Networks to register (single network or array of networks)\n   * Examples: \"eip155:84532\", [\"eip155:84532\", \"eip155:1\"]\n   */\n  networks: Network | Network[];\n\n  /**\n   * If enabled, the facilitator will deploy ERC-4337 smart wallets\n   * via EIP-6492 when encountering undeployed contract signatures.\n   *\n   * @default false\n   */\n  deployERC4337WithEIP6492?: boolean;\n}\n\n/**\n * Registers EVM exact payment schemes to an x402Facilitator instance.\n *\n * This function registers:\n * - V2: Specified networks with ExactEvmScheme\n * - V1: All supported EVM networks with ExactEvmSchemeV1\n *\n * @param facilitator - The x402Facilitator instance to register schemes to\n * @param config - Configuration for EVM facilitator registration\n * @returns The facilitator instance for chaining\n *\n * @example\n * ```typescript\n * import { registerExactEvmScheme } from \"@x402/evm/exact/facilitator/register\";\n * import { x402Facilitator } from \"@x402/core/facilitator\";\n * import { createPublicClient, createWalletClient } from \"viem\";\n *\n * const facilitator = new x402Facilitator();\n *\n * // Single network\n * registerExactEvmScheme(facilitator, {\n *   signer: combinedClient,\n *   networks: \"eip155:84532\"  // Base Sepolia\n * });\n *\n * // Multiple networks (will auto-derive eip155:* pattern)\n * registerExactEvmScheme(facilitator, {\n *   signer: combinedClient,\n *   networks: [\"eip155:84532\", \"eip155:1\"]  // Base Sepolia and Mainnet\n * });\n * ```\n */\nexport function registerExactEvmScheme(\n  facilitator: x402Facilitator,\n  config: EvmFacilitatorConfig,\n): x402Facilitator {\n  // Register V2 scheme with specified networks\n  facilitator.register(\n    config.networks,\n    new ExactEvmScheme(config.signer, {\n      deployERC4337WithEIP6492: config.deployERC4337WithEIP6492,\n    }),\n  );\n\n  // Register all V1 networks\n  facilitator.registerV1(\n    NETWORKS as Network[],\n    new ExactEvmSchemeV1(config.signer, {\n      deployERC4337WithEIP6492: config.deployERC4337WithEIP6492,\n    }),\n  );\n\n  return 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Required: ${requirements.amount} ${requirements.asset}, Available: ${balance.toString()} ${requirements.asset}. Please add funds to your wallet and try again.`,\n        payer,\n      };\n    }\n  } catch {\n    // If we can't check balance, continue with other validations\n  }\n\n  // Verify amount is sufficient\n  if (BigInt(eip3009Payload.authorization.value) < BigInt(requirements.amount)) {\n    return {\n      isValid: false,\n      invalidReason: \"invalid_exact_evm_payload_authorization_value\",\n      payer,\n    };\n  }\n\n  return {\n    isValid: true,\n    invalidReason: undefined,\n    payer,\n  };\n}\n\n/**\n * Settles an EIP-3009 payment by executing transferWithAuthorization.\n *\n * @param signer - The facilitator signer for contract writes\n * @param payload - The payment payload to settle\n * @param requirements - The payment requirements\n * @param eip3009Payload - The EIP-3009 specific payload\n * @param config - Facilitator configuration\n * @returns Promise resolving to settlement response\n */\nexport async function settleEIP3009(\n  signer: FacilitatorEvmSigner,\n  payload: PaymentPayload,\n  requirements: PaymentRequirements,\n  eip3009Payload: ExactEIP3009Payload,\n  config: EIP3009FacilitatorConfig,\n): Promise<SettleResponse> {\n  const payer = eip3009Payload.authorization.from;\n\n  // Re-verify before settling\n  const valid = await verifyEIP3009(signer, payload, requirements, eip3009Payload);\n  if (!valid.isValid) {\n    return {\n      success: false,\n      network: payload.accepted.network,\n      transaction: \"\",\n      errorReason: valid.invalidReason ?? \"invalid_scheme\",\n      payer,\n    };\n  }\n\n  try {\n    // Parse ERC-6492 signature if applicable\n    const parseResult = parseErc6492Signature(eip3009Payload.signature!);\n    const { signature, address: factoryAddress, data: factoryCalldata } = parseResult;\n\n    // Deploy ERC-4337 smart wallet via EIP-6492 if configured and needed\n    if (\n      config.deployERC4337WithEIP6492 &&\n      factoryAddress &&\n      factoryCalldata &&\n      !isAddressEqual(factoryAddress, \"0x0000000000000000000000000000000000000000\")\n    ) {\n      // Check if smart wallet is already deployed\n      const bytecode = await signer.getCode({ address: payer });\n\n      if (!bytecode || bytecode === \"0x\") {\n        // Wallet not deployed - attempt deployment\n        const deployTx = await signer.sendTransaction({\n          to: factoryAddress as Hex,\n          data: factoryCalldata as Hex,\n        });\n\n        // Wait for deployment transaction\n        await signer.waitForTransactionReceipt({ hash: deployTx });\n      }\n    }\n\n    // Determine if this is an ECDSA signature (EOA) or smart wallet signature\n    const signatureLength = signature.startsWith(\"0x\") ? signature.length - 2 : signature.length;\n    const isECDSA = signatureLength === 130;\n\n    let tx: Hex;\n    if (isECDSA) {\n      // For EOA wallets, parse signature into v, r, s and use that overload\n      const parsedSig = parseSignature(signature);\n\n      tx = await signer.writeContract({\n        address: getAddress(requirements.asset),\n        abi: eip3009ABI,\n        functionName: \"transferWithAuthorization\",\n        args: [\n          getAddress(eip3009Payload.authorization.from),\n          getAddress(eip3009Payload.authorization.to),\n          BigInt(eip3009Payload.authorization.value),\n          BigInt(eip3009Payload.authorization.validAfter),\n          BigInt(eip3009Payload.authorization.validBefore),\n          eip3009Payload.authorization.nonce,\n          (parsedSig.v as number | undefined) || parsedSig.yParity,\n          parsedSig.r,\n          parsedSig.s,\n        ],\n      });\n    } else {\n      // For smart wallets, use the bytes signature overload\n      tx = await signer.writeContract({\n        address: getAddress(requirements.asset),\n        abi: eip3009ABI,\n        functionName: \"transferWithAuthorization\",\n        args: [\n          getAddress(eip3009Payload.authorization.from),\n          getAddress(eip3009Payload.authorization.to),\n          BigInt(eip3009Payload.authorization.value),\n          BigInt(eip3009Payload.authorization.validAfter),\n          BigInt(eip3009Payload.authorization.validBefore),\n          eip3009Payload.authorization.nonce,\n          signature,\n        ],\n      });\n    }\n\n    // Wait for transaction confirmation\n    const receipt = await signer.waitForTransactionReceipt({ hash: tx });\n\n    if (receipt.status !== \"success\") {\n      return {\n        success: false,\n        errorReason: \"invalid_transaction_state\",\n        transaction: tx,\n        network: payload.accepted.network,\n        payer,\n      };\n    }\n\n    return {\n      success: true,\n      transaction: tx,\n      network: payload.accepted.network,\n      payer,\n    };\n  } catch {\n    return {\n      success: false,\n      errorReason: \"transaction_failed\",\n      transaction: \"\",\n      network: payload.accepted.network,\n      payer,\n    };\n  }\n}\n","import {\n  PaymentPayload,\n  PaymentRequirements,\n  SettleResponse,\n  VerifyResponse,\n} from \"@x402/core/types\";\nimport { getAddress } from \"viem\";\nimport {\n  eip3009ABI,\n  PERMIT2_ADDRESS,\n  permit2WitnessTypes,\n  x402ExactPermit2ProxyABI,\n  x402ExactPermit2ProxyAddress,\n} from \"../../constants\";\nimport { FacilitatorEvmSigner } from \"../../signer\";\nimport { ExactPermit2Payload } from \"../../types\";\n\n// ERC20 allowance ABI for checking Permit2 approval\nconst erc20AllowanceABI = [\n  {\n    type: \"function\",\n    name: \"allowance\",\n    inputs: [\n      { name: \"owner\", type: \"address\" },\n      { name: \"spender\", type: \"address\" },\n    ],\n    outputs: [{ type: \"uint256\" }],\n    stateMutability: \"view\",\n  },\n] as const;\n\n/**\n * Verifies a Permit2 payment payload.\n *\n * @param signer - The facilitator signer for contract reads\n * @param payload - The payment payload to verify\n * @param requirements - The payment requirements\n * @param permit2Payload - The Permit2 specific payload\n * @returns Promise resolving to verification response\n */\nexport async function verifyPermit2(\n  signer: FacilitatorEvmSigner,\n  payload: PaymentPayload,\n  requirements: PaymentRequirements,\n  permit2Payload: ExactPermit2Payload,\n): Promise<VerifyResponse> {\n  const payer = permit2Payload.permit2Authorization.from;\n\n  // Verify scheme matches\n  if (payload.accepted.scheme !== \"exact\" || requirements.scheme !== \"exact\") {\n    return {\n      isValid: false,\n      invalidReason: \"unsupported_scheme\",\n      payer,\n    };\n  }\n\n  // Verify network matches\n  if (payload.accepted.network !== requirements.network) {\n    return {\n      isValid: false,\n      invalidReason: \"network_mismatch\",\n      payer,\n    };\n  }\n\n  const chainId = parseInt(requirements.network.split(\":\")[1]);\n  const tokenAddress = getAddress(requirements.asset);\n\n  // Verify spender is the x402ExactPermit2Proxy\n  if (\n    getAddress(permit2Payload.permit2Authorization.spender) !==\n    getAddress(x402ExactPermit2ProxyAddress)\n  ) {\n    return {\n      isValid: false,\n      invalidReason: \"invalid_permit2_spender\",\n      payer,\n    };\n  }\n\n  // Verify witness.to matches payTo\n  if (\n    getAddress(permit2Payload.permit2Authorization.witness.to) !== getAddress(requirements.payTo)\n  ) {\n    return {\n      isValid: false,\n      invalidReason: \"invalid_permit2_recipient_mismatch\",\n      payer,\n    };\n  }\n\n  // Verify deadline not expired (with 6 second buffer for block time)\n  const now = Math.floor(Date.now() / 1000);\n  if (BigInt(permit2Payload.permit2Authorization.deadline) < BigInt(now + 6)) {\n    return {\n      isValid: false,\n      invalidReason: \"permit2_deadline_expired\",\n      payer,\n    };\n  }\n\n  // Verify validAfter is not in the future\n  if (BigInt(permit2Payload.permit2Authorization.witness.validAfter) > BigInt(now)) {\n    return {\n      isValid: false,\n      invalidReason: \"permit2_not_yet_valid\",\n      payer,\n    };\n  }\n\n  // Verify amount is sufficient\n  if (BigInt(permit2Payload.permit2Authorization.permitted.amount) < BigInt(requirements.amount)) {\n    return {\n      isValid: false,\n      invalidReason: \"permit2_insufficient_amount\",\n      payer,\n    };\n  }\n\n  // Verify token matches\n  if (getAddress(permit2Payload.permit2Authorization.permitted.token) !== tokenAddress) {\n    return {\n      isValid: false,\n      invalidReason: \"permit2_token_mismatch\",\n      payer,\n    };\n  }\n\n  // Build typed data for Permit2 signature verification\n  const permit2TypedData = {\n    types: permit2WitnessTypes,\n    primaryType: \"PermitWitnessTransferFrom\" as const,\n    domain: {\n      name: \"Permit2\",\n      chainId,\n      verifyingContract: PERMIT2_ADDRESS,\n    },\n    message: {\n      permitted: {\n        token: getAddress(permit2Payload.permit2Authorization.permitted.token),\n        amount: BigInt(permit2Payload.permit2Authorization.permitted.amount),\n      },\n      spender: getAddress(permit2Payload.permit2Authorization.spender),\n      nonce: BigInt(permit2Payload.permit2Authorization.nonce),\n      deadline: BigInt(permit2Payload.permit2Authorization.deadline),\n      witness: {\n        to: getAddress(permit2Payload.permit2Authorization.witness.to),\n        validAfter: BigInt(permit2Payload.permit2Authorization.witness.validAfter),\n        extra: permit2Payload.permit2Authorization.witness.extra,\n      },\n    },\n  };\n\n  // Verify signature\n  try {\n    const isValid = await signer.verifyTypedData({\n      address: payer,\n      ...permit2TypedData,\n      signature: permit2Payload.signature,\n    });\n\n    if (!isValid) {\n      return {\n        isValid: false,\n        invalidReason: \"invalid_permit2_signature\",\n        payer,\n      };\n    }\n  } catch {\n    return {\n      isValid: false,\n      invalidReason: \"invalid_permit2_signature\",\n      payer,\n    };\n  }\n\n  // Check Permit2 allowance\n  try {\n    const allowance = (await signer.readContract({\n      address: tokenAddress,\n      abi: erc20AllowanceABI,\n      functionName: \"allowance\",\n      args: [payer, PERMIT2_ADDRESS],\n    })) as bigint;\n\n    if (allowance < BigInt(requirements.amount)) {\n      return {\n        isValid: false,\n        invalidReason: \"permit2_allowance_required\",\n        payer,\n      };\n    }\n  } catch {\n    // If we can't check allowance, continue - settlement will fail if insufficient\n  }\n\n  // Check balance\n  try {\n    const balance = (await signer.readContract({\n      address: tokenAddress,\n      abi: eip3009ABI,\n      functionName: \"balanceOf\",\n      args: [payer],\n    })) as bigint;\n\n    if (balance < BigInt(requirements.amount)) {\n      return {\n        isValid: false,\n        invalidReason: \"insufficient_funds\",\n        invalidMessage: `Insufficient funds to complete the payment. Required: ${requirements.amount} ${requirements.asset}, Available: ${balance.toString()} ${requirements.asset}. Please add funds to your wallet and try again.`,\n        payer,\n      };\n    }\n  } catch {\n    // If we can't check balance, continue with other validations\n  }\n\n  return {\n    isValid: true,\n    invalidReason: undefined,\n    payer,\n  };\n}\n\n/**\n * Settles a Permit2 payment by calling the x402ExactPermit2Proxy.\n *\n * @param signer - The facilitator signer for contract writes\n * @param payload - The payment payload to settle\n * @param requirements - The payment requirements\n * @param permit2Payload - The Permit2 specific payload\n * @returns Promise resolving to settlement response\n */\nexport async function settlePermit2(\n  signer: FacilitatorEvmSigner,\n  payload: PaymentPayload,\n  requirements: PaymentRequirements,\n  permit2Payload: ExactPermit2Payload,\n): Promise<SettleResponse> {\n  const payer = permit2Payload.permit2Authorization.from;\n\n  // Re-verify before settling\n  const valid = await verifyPermit2(signer, payload, requirements, permit2Payload);\n  if (!valid.isValid) {\n    return {\n      success: false,\n      network: payload.accepted.network,\n      transaction: \"\",\n      errorReason: valid.invalidReason ?? \"invalid_scheme\",\n      payer,\n    };\n  }\n\n  try {\n    // Call x402ExactPermit2Proxy.settle()\n    const tx = await signer.writeContract({\n      address: x402ExactPermit2ProxyAddress,\n      abi: x402ExactPermit2ProxyABI,\n      functionName: \"settle\",\n      args: [\n        {\n          permitted: {\n            token: getAddress(permit2Payload.permit2Authorization.permitted.token),\n            amount: BigInt(permit2Payload.permit2Authorization.permitted.amount),\n          },\n          nonce: BigInt(permit2Payload.permit2Authorization.nonce),\n          deadline: BigInt(permit2Payload.permit2Authorization.deadline),\n        },\n        getAddress(payer),\n        {\n          to: getAddress(permit2Payload.permit2Authorization.witness.to),\n          validAfter: BigInt(permit2Payload.permit2Authorization.witness.validAfter),\n          extra: permit2Payload.permit2Authorization.witness.extra as `0x${string}`,\n        },\n        permit2Payload.signature,\n      ],\n    });\n\n    // Wait for transaction confirmation\n    const receipt = await signer.waitForTransactionReceipt({ hash: tx });\n\n    if (receipt.status !== \"success\") {\n      return {\n        success: false,\n        errorReason: \"invalid_transaction_state\",\n        transaction: tx,\n        network: payload.accepted.network,\n        payer,\n      };\n    }\n\n    return {\n      success: true,\n      transaction: tx,\n      network: payload.accepted.network,\n      payer,\n    };\n  } catch (error) {\n    // Extract meaningful error message from the contract revert\n    let errorReason = \"transaction_failed\";\n    if (error instanceof Error) {\n      // Check for common contract revert patterns\n      const message = error.message;\n      if (message.includes(\"AmountExceedsPermitted\")) {\n        errorReason = \"permit2_amount_exceeds_permitted\";\n      } else if (message.includes(\"InvalidDestination\")) {\n        errorReason = \"permit2_invalid_destination\";\n      } else if (message.includes(\"InvalidOwner\")) {\n        errorReason = \"permit2_invalid_owner\";\n      } else if (message.includes(\"PaymentTooEarly\")) {\n        errorReason = \"permit2_payment_too_early\";\n      } else if (message.includes(\"InvalidSignature\") || message.includes(\"SignatureExpired\")) {\n        errorReason = \"permit2_invalid_signature\";\n      } else if (message.includes(\"InvalidNonce\")) {\n        errorReason = \"permit2_invalid_nonce\";\n      } else {\n        // Include error message for debugging (longer for better visibility)\n        errorReason = `transaction_failed: ${message.slice(0, 500)}`;\n      }\n    }\n    return {\n      success: false,\n      errorReason,\n      transaction: \"\",\n      network: payload.accepted.network,\n      payer,\n    };\n  }\n}\n","import {\n  PaymentPayload,\n  PaymentRequirements,\n  SchemeNetworkFacilitator,\n  SettleResponse,\n  VerifyResponse,\n} from \"@x402/core/types\";\nimport { FacilitatorEvmSigner } from \"../../signer\";\nimport { ExactEvmPayloadV2, ExactEIP3009Payload, isPermit2Payload } from \"../../types\";\nimport { verifyEIP3009, settleEIP3009 } from \"./eip3009\";\nimport { verifyPermit2, settlePermit2 } from \"./permit2\";\n\nexport interface ExactEvmSchemeConfig {\n  /**\n   * If enabled, the facilitator will deploy ERC-4337 smart wallets\n   * via EIP-6492 when encountering undeployed contract signatures.\n   *\n   * @default false\n   */\n  deployERC4337WithEIP6492?: boolean;\n}\n\n/**\n * EVM facilitator implementation for the Exact payment scheme.\n * Routes between EIP-3009 and Permit2 based on payload type.\n */\nexport class ExactEvmScheme implements SchemeNetworkFacilitator {\n  readonly scheme = \"exact\";\n  readonly caipFamily = \"eip155:*\";\n  private readonly config: Required<ExactEvmSchemeConfig>;\n\n  /**\n   * Creates a new ExactEvmFacilitator instance.\n   *\n   * @param signer - The EVM signer for facilitator operations\n   * @param config - Optional configuration for the facilitator\n   */\n  constructor(\n    private readonly signer: FacilitatorEvmSigner,\n    config?: ExactEvmSchemeConfig,\n  ) {\n    this.config = {\n      deployERC4337WithEIP6492: config?.deployERC4337WithEIP6492 ?? false,\n    };\n  }\n\n  /**\n   * Get mechanism-specific extra data for the supported kinds endpoint.\n   * For EVM, no extra data is needed.\n   *\n   * @param _ - The network identifier (unused for EVM)\n   * @returns undefined (EVM has no extra data)\n   */\n  getExtra(_: string): Record<string, unknown> | undefined {\n    return undefined;\n  }\n\n  /**\n   * Get signer addresses used by this facilitator.\n   * Returns all addresses this facilitator can use for signing/settling transactions.\n   *\n   * @param _ - The network identifier (unused for EVM, addresses are network-agnostic)\n   * @returns Array of facilitator wallet addresses\n   */\n  getSigners(_: string): string[] {\n    return [...this.signer.getAddresses()];\n  }\n\n  /**\n   * Verifies a payment payload.\n   * Routes to the appropriate verification logic based on payload type.\n   *\n   * @param payload - The payment payload to verify\n   * @param requirements - The payment requirements\n   * @returns Promise resolving to verification response\n   */\n  async verify(\n    payload: PaymentPayload,\n    requirements: PaymentRequirements,\n  ): Promise<VerifyResponse> {\n    const rawPayload = payload.payload as ExactEvmPayloadV2;\n\n    // Route based on payload type\n    if (isPermit2Payload(rawPayload)) {\n      return verifyPermit2(this.signer, payload, requirements, rawPayload);\n    }\n\n    // Type-narrowed to EIP-3009 payload\n    const eip3009Payload: ExactEIP3009Payload = rawPayload;\n    return verifyEIP3009(this.signer, payload, requirements, eip3009Payload);\n  }\n\n  /**\n   * Settles a payment by executing the transfer.\n   * Routes to the appropriate settlement logic based on payload type.\n   *\n   * @param payload - The payment payload to settle\n   * @param requirements - The payment requirements\n   * @returns Promise resolving to settlement response\n   */\n  async settle(\n    payload: PaymentPayload,\n    requirements: PaymentRequirements,\n  ): Promise<SettleResponse> {\n    const rawPayload = payload.payload as ExactEvmPayloadV2;\n\n    // Route based on payload type\n    if (isPermit2Payload(rawPayload)) {\n      return settlePermit2(this.signer, payload, requirements, rawPayload);\n    }\n\n    // Type-narrowed to EIP-3009 payload\n    const eip3009Payload: ExactEIP3009Payload = rawPayload;\n    return settleEIP3009(this.signer, payload, requirements, eip3009Payload, this.config);\n  }\n}\n","import { x402Facilitator } from \"@x402/core/facilitator\";\nimport { Network } from \"@x402/core/types\";\nimport { FacilitatorEvmSigner } from \"../../signer\";\nimport { ExactEvmScheme } from \"./scheme\";\nimport { ExactEvmSchemeV1 } from \"../v1/facilitator/scheme\";\nimport { NETWORKS } from \"../../v1\";\n\n/**\n * Configuration options for registering EVM schemes to an x402Facilitator\n */\nexport interface EvmFacilitatorConfig {\n  /**\n   * The EVM signer for facilitator operations (verify and settle)\n   */\n  signer: FacilitatorEvmSigner;\n\n  /**\n   * Networks to register (single network or array of networks)\n   * Examples: \"eip155:84532\", [\"eip155:84532\", \"eip155:1\"]\n   */\n  networks: Network | Network[];\n\n  /**\n   * If enabled, the facilitator will deploy ERC-4337 smart wallets\n   * via EIP-6492 when encountering undeployed contract signatures.\n   *\n   * @default false\n   */\n  deployERC4337WithEIP6492?: boolean;\n}\n\n/**\n * Registers EVM exact payment schemes to an x402Facilitator instance.\n *\n * This function registers:\n * - V2: Specified networks with ExactEvmScheme\n * - V1: All supported EVM networks with ExactEvmSchemeV1\n *\n * @param facilitator - The x402Facilitator instance to register schemes to\n * @param config - Configuration for EVM facilitator registration\n * @returns The facilitator instance for chaining\n *\n * @example\n * ```typescript\n * import { registerExactEvmScheme } from \"@x402/evm/exact/facilitator/register\";\n * import { x402Facilitator } from \"@x402/core/facilitator\";\n * import { createPublicClient, createWalletClient } from \"viem\";\n *\n * const facilitator = new x402Facilitator();\n *\n * // Single network\n * registerExactEvmScheme(facilitator, {\n *   signer: combinedClient,\n *   networks: \"eip155:84532\"  // Base Sepolia\n * });\n *\n * // Multiple networks (will auto-derive eip155:* pattern)\n * registerExactEvmScheme(facilitator, {\n *   signer: combinedClient,\n *   networks: [\"eip155:84532\", \"eip155:1\"]  // Base Sepolia and Mainnet\n * });\n * ```\n */\nexport function registerExactEvmScheme(\n  facilitator: x402Facilitator,\n  config: EvmFacilitatorConfig,\n): x402Facilitator {\n  // Register V2 scheme with specified networks\n  facilitator.register(\n    config.networks,\n    new ExactEvmScheme(config.signer, {\n      deployERC4337WithEIP6492: config.deployERC4337WithEIP6492,\n    }),\n  );\n\n  // Register all V1 networks\n  facilitator.registerV1(\n    NETWORKS as Network[],\n    new ExactEvmSchemeV1(config.signer, {\n      deployERC4337WithEIP6492: config.deployERC4337WithEIP6492,\n    }),\n  );\n\n  return 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dist/esm/exact/v1/client/index.mjs

 import {
   ExactEvmSchemeV1
-} from "../../../chunk-PSA4YVU2.mjs";
-import "../../../chunk-ZYXTTU74.mjs";
+} from "../../../chunk-DSSJHWGT.mjs";
 export {
@@ -6,0 +5,0 @@ ExactEvmSchemeV1

dist/esm/exact/v1/facilitator/index.mjs

 import {
-  ExactEvmSchemeV1
-} from "../../../chunk-JYZWCLMP.mjs";
-import "../../../chunk-ZYXTTU74.mjs";
+  ExactEvmSchemeV12 as ExactEvmSchemeV1
+} from "../../../chunk-DSSJHWGT.mjs";
 export {
@@ -6,0 +5,0 @@ ExactEvmSchemeV1

dist/esm/index.d.mts

@@ -1,36 +0,463 @@
-import { SchemeNetworkClient, PaymentRequirements, PaymentPayload } from '@x402/core/types';
-import { C as ClientEvmSigner } from './signer-5OVDxViv.mjs';
-export { F as FacilitatorEvmSigner, t as toClientEvmSigner, a as toFacilitatorEvmSigner } from './signer-5OVDxViv.mjs';
+export { E as ExactEvmScheme, P as Permit2AllowanceParams, c as createPermit2ApprovalTx, e as erc20AllowanceAbi, g as getPermit2AllowanceReadParams } from './permit2-BsAoJiWD.mjs';
+export { C as ClientEvmSigner, F as FacilitatorEvmSigner, t as toClientEvmSigner, a as toFacilitatorEvmSigner } from './signer-5OVDxViv.mjs';
+import '@x402/core/types';
 
 /**
- * EVM client implementation for the Exact payment scheme.
+ * Asset transfer methods for the exact EVM scheme.
+ * - eip3009: Uses transferWithAuthorization (USDC, etc.) - recommended for compatible tokens
+ * - permit2: Uses Permit2 + x402Permit2Proxy - universal fallback for any ERC-20
+ */
+type AssetTransferMethod = "eip3009" | "permit2";
+/**
+ * EIP-3009 payload for tokens with native transferWithAuthorization support.
+ */
+type ExactEIP3009Payload = {
+    signature?: `0x${string}`;
+    authorization: {
+        from: `0x${string}`;
+        to: `0x${string}`;
+        value: string;
+        validAfter: string;
+        validBefore: string;
+        nonce: `0x${string}`;
+    };
+};
+/**
+ * Permit2 witness data structure.
+ * Matches the Witness struct in x402Permit2Proxy contract.
+ * Note: Upper time bound is enforced by Permit2's `deadline` field, not a witness field.
+ */
+type Permit2Witness = {
+    to: `0x${string}`;
+    validAfter: string;
+    extra: `0x${string}`;
+};
+/**
+ * Permit2 authorization parameters.
+ * Used to reconstruct the signed message for verification.
+ */
+type Permit2Authorization = {
+    permitted: {
+        token: `0x${string}`;
+        amount: string;
+    };
+    spender: `0x${string}`;
+    nonce: string;
+    deadline: string;
+    witness: Permit2Witness;
+};
+/**
+ * Permit2 payload for tokens using the Permit2 + x402Permit2Proxy flow.
+ */
+type ExactPermit2Payload = {
+    signature: `0x${string}`;
+    permit2Authorization: Permit2Authorization & {
+        from: `0x${string}`;
+    };
+};
+type ExactEvmPayloadV1 = ExactEIP3009Payload;
+type ExactEvmPayloadV2 = ExactEIP3009Payload | ExactPermit2Payload;
+/**
+ * Type guard to check if a payload is a Permit2 payload.
+ * Permit2 payloads have a `permit2Authorization` field.
  *
+ * @param payload - The payload to check.
+ * @returns True if the payload is a Permit2 payload, false otherwise.
  */
-declare class ExactEvmScheme implements SchemeNetworkClient {
-    private readonly signer;
-    readonly scheme = "exact";
-    /**
-     * Creates a new ExactEvmClient instance.
-     *
-     * @param signer - The EVM signer for client operations
-     */
-    constructor(signer: ClientEvmSigner);
-    /**
-     * Creates a payment payload for the Exact scheme.
-     *
-     * @param x402Version - The x402 protocol version
-     * @param paymentRequirements - The payment requirements
-     * @returns Promise resolving to a payment payload
-     */
-    createPaymentPayload(x402Version: number, paymentRequirements: PaymentRequirements): Promise<Pick<PaymentPayload, "x402Version" | "payload">>;
-    /**
-     * Sign the EIP-3009 authorization using EIP-712
-     *
-     * @param authorization - The authorization to sign
-     * @param requirements - The payment requirements
-     * @returns Promise resolving to the signature
-     */
-    private signAuthorization;
-}
+declare function isPermit2Payload(payload: ExactEvmPayloadV2): payload is ExactPermit2Payload;
+/**
+ * Type guard to check if a payload is an EIP-3009 payload.
+ * EIP-3009 payloads have an `authorization` field.
+ *
+ * @param payload - The payload to check.
+ * @returns True if the payload is an EIP-3009 payload, false otherwise.
+ */
+declare function isEIP3009Payload(payload: ExactEvmPayloadV2): payload is ExactEIP3009Payload;
 
-export { ClientEvmSigner, ExactEvmScheme };
+declare const authorizationTypes: {
+    readonly TransferWithAuthorization: readonly [{
+        readonly name: "from";
+        readonly type: "address";
+    }, {
+        readonly name: "to";
+        readonly type: "address";
+    }, {
+        readonly name: "value";
+        readonly type: "uint256";
+    }, {
+        readonly name: "validAfter";
+        readonly type: "uint256";
+    }, {
+        readonly name: "validBefore";
+        readonly type: "uint256";
+    }, {
+        readonly name: "nonce";
+        readonly type: "bytes32";
+    }];
+};
+/**
+ * Permit2 EIP-712 types for signing PermitWitnessTransferFrom.
+ * Must match the exact format expected by the Permit2 contract.
+ * Note: Types must be in ALPHABETICAL order after the primary type (TokenPermissions < Witness).
+ */
+declare const permit2WitnessTypes: {
+    readonly PermitWitnessTransferFrom: readonly [{
+        readonly name: "permitted";
+        readonly type: "TokenPermissions";
+    }, {
+        readonly name: "spender";
+        readonly type: "address";
+    }, {
+        readonly name: "nonce";
+        readonly type: "uint256";
+    }, {
+        readonly name: "deadline";
+        readonly type: "uint256";
+    }, {
+        readonly name: "witness";
+        readonly type: "Witness";
+    }];
+    readonly TokenPermissions: readonly [{
+        readonly name: "token";
+        readonly type: "address";
+    }, {
+        readonly name: "amount";
+        readonly type: "uint256";
+    }];
+    readonly Witness: readonly [{
+        readonly name: "to";
+        readonly type: "address";
+    }, {
+        readonly name: "validAfter";
+        readonly type: "uint256";
+    }, {
+        readonly name: "extra";
+        readonly type: "bytes";
+    }];
+};
+declare const eip3009ABI: readonly [{
+    readonly inputs: readonly [{
+        readonly name: "from";
+        readonly type: "address";
+    }, {
+        readonly name: "to";
+        readonly type: "address";
+    }, {
+        readonly name: "value";
+        readonly type: "uint256";
+    }, {
+        readonly name: "validAfter";
+        readonly type: "uint256";
+    }, {
+        readonly name: "validBefore";
+        readonly type: "uint256";
+    }, {
+        readonly name: "nonce";
+        readonly type: "bytes32";
+    }, {
+        readonly name: "v";
+        readonly type: "uint8";
+    }, {
+        readonly name: "r";
+        readonly type: "bytes32";
+    }, {
+        readonly name: "s";
+        readonly type: "bytes32";
+    }];
+    readonly name: "transferWithAuthorization";
+    readonly outputs: readonly [];
+    readonly stateMutability: "nonpayable";
+    readonly type: "function";
+}, {
+    readonly inputs: readonly [{
+        readonly name: "from";
+        readonly type: "address";
+    }, {
+        readonly name: "to";
+        readonly type: "address";
+    }, {
+        readonly name: "value";
+        readonly type: "uint256";
+    }, {
+        readonly name: "validAfter";
+        readonly type: "uint256";
+    }, {
+        readonly name: "validBefore";
+        readonly type: "uint256";
+    }, {
+        readonly name: "nonce";
+        readonly type: "bytes32";
+    }, {
+        readonly name: "signature";
+        readonly type: "bytes";
+    }];
+    readonly name: "transferWithAuthorization";
+    readonly outputs: readonly [];
+    readonly stateMutability: "nonpayable";
+    readonly type: "function";
+}, {
+    readonly inputs: readonly [{
+        readonly name: "account";
+        readonly type: "address";
+    }];
+    readonly name: "balanceOf";
+    readonly outputs: readonly [{
+        readonly name: "";
+        readonly type: "uint256";
+    }];
+    readonly stateMutability: "view";
+    readonly type: "function";
+}, {
+    readonly inputs: readonly [];
+    readonly name: "version";
+    readonly outputs: readonly [{
+        readonly name: "";
+        readonly type: "string";
+    }];
+    readonly stateMutability: "view";
+    readonly type: "function";
+}];
+/**
+ * Canonical Permit2 contract address.
+ * Same address on all EVM chains via CREATE2 deployment.
+ *
+ * @see https://github.com/Uniswap/permit2
+ */
+declare const PERMIT2_ADDRESS: "0x000000000022D473030F116dDEE9F6B43aC78BA3";
+/**
+ * x402ExactPermit2Proxy contract address.
+ * Vanity address: 0x4020...0001 for easy recognition.
+ * This address is deterministic based on:
+ * - Arachnid's deterministic deployer (0x4e59b44847b379578588920cA78FbF26c0B4956C)
+ * - Vanity-mined salt for prefix 0x4020 and suffix 0001
+ * - Contract bytecode + constructor args (PERMIT2_ADDRESS)
+ */
+declare const x402ExactPermit2ProxyAddress: "0x4020615294c913F045dc10f0a5cdEbd86c280001";
+/**
+ * x402UptoPermit2Proxy contract address.
+ * Vanity address: 0x4020...0002 for easy recognition.
+ * This address is deterministic based on:
+ * - Arachnid's deterministic deployer (0x4e59b44847b379578588920cA78FbF26c0B4956C)
+ * - Vanity-mined salt for prefix 0x4020 and suffix 0002
+ * - Contract bytecode + constructor args (PERMIT2_ADDRESS)
+ */
+declare const x402UptoPermit2ProxyAddress: "0x4020633461b2895a48930Ff97eE8fCdE8E520002";
+/**
+ * x402ExactPermit2Proxy ABI - settle function for exact payment scheme.
+ */
+declare const x402ExactPermit2ProxyABI: readonly [{
+    readonly type: "function";
+    readonly name: "PERMIT2";
+    readonly inputs: readonly [];
+    readonly outputs: readonly [{
+        readonly name: "";
+        readonly type: "address";
+        readonly internalType: "contract ISignatureTransfer";
+    }];
+    readonly stateMutability: "view";
+}, {
+    readonly type: "function";
+    readonly name: "WITNESS_TYPEHASH";
+    readonly inputs: readonly [];
+    readonly outputs: readonly [{
+        readonly name: "";
+        readonly type: "bytes32";
+        readonly internalType: "bytes32";
+    }];
+    readonly stateMutability: "view";
+}, {
+    readonly type: "function";
+    readonly name: "WITNESS_TYPE_STRING";
+    readonly inputs: readonly [];
+    readonly outputs: readonly [{
+        readonly name: "";
+        readonly type: "string";
+        readonly internalType: "string";
+    }];
+    readonly stateMutability: "view";
+}, {
+    readonly type: "function";
+    readonly name: "initialize";
+    readonly inputs: readonly [{
+        readonly name: "_permit2";
+        readonly type: "address";
+        readonly internalType: "address";
+    }];
+    readonly outputs: readonly [];
+    readonly stateMutability: "nonpayable";
+}, {
+    readonly type: "function";
+    readonly name: "settle";
+    readonly inputs: readonly [{
+        readonly name: "permit";
+        readonly type: "tuple";
+        readonly internalType: "struct ISignatureTransfer.PermitTransferFrom";
+        readonly components: readonly [{
+            readonly name: "permitted";
+            readonly type: "tuple";
+            readonly internalType: "struct ISignatureTransfer.TokenPermissions";
+            readonly components: readonly [{
+                readonly name: "token";
+                readonly type: "address";
+                readonly internalType: "address";
+            }, {
+                readonly name: "amount";
+                readonly type: "uint256";
+                readonly internalType: "uint256";
+            }];
+        }, {
+            readonly name: "nonce";
+            readonly type: "uint256";
+            readonly internalType: "uint256";
+        }, {
+            readonly name: "deadline";
+            readonly type: "uint256";
+            readonly internalType: "uint256";
+        }];
+    }, {
+        readonly name: "owner";
+        readonly type: "address";
+        readonly internalType: "address";
+    }, {
+        readonly name: "witness";
+        readonly type: "tuple";
+        readonly internalType: "struct x402BasePermit2Proxy.Witness";
+        readonly components: readonly [{
+            readonly name: "to";
+            readonly type: "address";
+            readonly internalType: "address";
+        }, {
+            readonly name: "validAfter";
+            readonly type: "uint256";
+            readonly internalType: "uint256";
+        }, {
+            readonly name: "extra";
+            readonly type: "bytes";
+            readonly internalType: "bytes";
+        }];
+    }, {
+        readonly name: "signature";
+        readonly type: "bytes";
+        readonly internalType: "bytes";
+    }];
+    readonly outputs: readonly [];
+    readonly stateMutability: "nonpayable";
+}, {
+    readonly type: "function";
+    readonly name: "settleWithPermit";
+    readonly inputs: readonly [{
+        readonly name: "permit2612";
+        readonly type: "tuple";
+        readonly internalType: "struct x402BasePermit2Proxy.EIP2612Permit";
+        readonly components: readonly [{
+            readonly name: "value";
+            readonly type: "uint256";
+            readonly internalType: "uint256";
+        }, {
+            readonly name: "deadline";
+            readonly type: "uint256";
+            readonly internalType: "uint256";
+        }, {
+            readonly name: "r";
+            readonly type: "bytes32";
+            readonly internalType: "bytes32";
+        }, {
+            readonly name: "s";
+            readonly type: "bytes32";
+            readonly internalType: "bytes32";
+        }, {
+            readonly name: "v";
+            readonly type: "uint8";
+            readonly internalType: "uint8";
+        }];
+    }, {
+        readonly name: "permit";
+        readonly type: "tuple";
+        readonly internalType: "struct ISignatureTransfer.PermitTransferFrom";
+        readonly components: readonly [{
+            readonly name: "permitted";
+            readonly type: "tuple";
+            readonly internalType: "struct ISignatureTransfer.TokenPermissions";
+            readonly components: readonly [{
+                readonly name: "token";
+                readonly type: "address";
+                readonly internalType: "address";
+            }, {
+                readonly name: "amount";
+                readonly type: "uint256";
+                readonly internalType: "uint256";
+            }];
+        }, {
+            readonly name: "nonce";
+            readonly type: "uint256";
+            readonly internalType: "uint256";
+        }, {
+            readonly name: "deadline";
+            readonly type: "uint256";
+            readonly internalType: "uint256";
+        }];
+    }, {
+        readonly name: "owner";
+        readonly type: "address";
+        readonly internalType: "address";
+    }, {
+        readonly name: "witness";
+        readonly type: "tuple";
+        readonly internalType: "struct x402BasePermit2Proxy.Witness";
+        readonly components: readonly [{
+            readonly name: "to";
+            readonly type: "address";
+            readonly internalType: "address";
+        }, {
+            readonly name: "validAfter";
+            readonly type: "uint256";
+            readonly internalType: "uint256";
+        }, {
+            readonly name: "extra";
+            readonly type: "bytes";
+            readonly internalType: "bytes";
+        }];
+    }, {
+        readonly name: "signature";
+        readonly type: "bytes";
+        readonly internalType: "bytes";
+    }];
+    readonly outputs: readonly [];
+    readonly stateMutability: "nonpayable";
+}, {
+    readonly type: "event";
+    readonly name: "Settled";
+    readonly inputs: readonly [];
+    readonly anonymous: false;
+}, {
+    readonly type: "event";
+    readonly name: "SettledWithPermit";
+    readonly inputs: readonly [];
+    readonly anonymous: false;
+}, {
+    readonly type: "error";
+    readonly name: "AlreadyInitialized";
+    readonly inputs: readonly [];
+}, {
+    readonly type: "error";
+    readonly name: "InvalidDestination";
+    readonly inputs: readonly [];
+}, {
+    readonly type: "error";
+    readonly name: "InvalidOwner";
+    readonly inputs: readonly [];
+}, {
+    readonly type: "error";
+    readonly name: "InvalidPermit2Address";
+    readonly inputs: readonly [];
+}, {
+    readonly type: "error";
+    readonly name: "PaymentTooEarly";
+    readonly inputs: readonly [];
+}, {
+    readonly type: "error";
+    readonly name: "ReentrancyGuardReentrantCall";
+    readonly inputs: readonly [];
+}];
+
+export { type AssetTransferMethod, type ExactEIP3009Payload, type ExactEvmPayloadV1, type ExactEvmPayloadV2, type ExactPermit2Payload, PERMIT2_ADDRESS, type Permit2Authorization, type Permit2Witness, authorizationTypes, eip3009ABI, isEIP3009Payload, isPermit2Payload, permit2WitnessTypes, x402ExactPermit2ProxyABI, x402ExactPermit2ProxyAddress, x402UptoPermit2ProxyAddress };

dist/esm/index.mjs

 import {
-  ExactEvmScheme
-} from "./chunk-FOUXRQAV.mjs";
-import "./chunk-ZYXTTU74.mjs";
+  ExactEvmScheme,
+  createPermit2ApprovalTx,
+  erc20AllowanceAbi,
+  getPermit2AllowanceReadParams
+} from "./chunk-U4H6Q62Q.mjs";
+import {
+  isEIP3009Payload,
+  isPermit2Payload
+} from "./chunk-PFULIQAE.mjs";
+import {
+  PERMIT2_ADDRESS,
+  authorizationTypes,
+  eip3009ABI,
+  permit2WitnessTypes,
+  x402ExactPermit2ProxyABI,
+  x402ExactPermit2ProxyAddress,
+  x402UptoPermit2ProxyAddress
+} from "./chunk-DSSJHWGT.mjs";
 
@@ -18,5 +33,17 @@ // src/signer.ts
   ExactEvmScheme,
+  PERMIT2_ADDRESS,
+  authorizationTypes,
+  createPermit2ApprovalTx,
+  eip3009ABI,
+  erc20AllowanceAbi,
+  getPermit2AllowanceReadParams,
+  isEIP3009Payload,
+  isPermit2Payload,
+  permit2WitnessTypes,
   toClientEvmSigner,
-  toFacilitatorEvmSigner
+  toFacilitatorEvmSigner,
+  x402ExactPermit2ProxyABI,
+  x402ExactPermit2ProxyAddress,
+  x402UptoPermit2ProxyAddress
 };
 //# sourceMappingURL=index.mjs.map

dist/esm/index.mjs.map

@@ -1,1 +0,1 @@
-{"version":3,"sources":["../../src/signer.ts"],"sourcesContent":["/**\n * ClientEvmSigner - Used by x402 clients to sign payment authorizations\n * This is typically a LocalAccount or wallet that holds private keys\n * and can sign EIP-712 typed data for payment authorizations\n */\nexport type ClientEvmSigner = {\n  readonly address: `0x${string}`;\n  signTypedData(message: {\n    domain: Record<string, unknown>;\n    types: Record<string, unknown>;\n    primaryType: string;\n    message: Record<string, unknown>;\n  }): Promise<`0x${string}`>;\n};\n\n/**\n * FacilitatorEvmSigner - Used by x402 facilitators to verify and settle payments\n * This is typically a viem PublicClient + WalletClient combination that can\n * read contract state, verify signatures, write transactions, and wait for receipts\n *\n * Supports multiple addresses for load balancing, key rotation, and high availability\n */\nexport type FacilitatorEvmSigner = {\n  /**\n   * Get all addresses this facilitator can use for signing\n   * Enables dynamic address selection for load balancing and key rotation\n   */\n  getAddresses(): readonly `0x${string}`[];\n\n  readContract(args: {\n    address: `0x${string}`;\n    abi: readonly unknown[];\n    functionName: string;\n    args?: readonly unknown[];\n  }): Promise<unknown>;\n  verifyTypedData(args: {\n    address: `0x${string}`;\n    domain: Record<string, unknown>;\n    types: Record<string, unknown>;\n    primaryType: string;\n    message: Record<string, unknown>;\n    signature: `0x${string}`;\n  }): Promise<boolean>;\n  writeContract(args: {\n    address: `0x${string}`;\n    abi: readonly unknown[];\n    functionName: string;\n    args: readonly unknown[];\n  }): Promise<`0x${string}`>;\n  sendTransaction(args: { to: `0x${string}`; data: `0x${string}` }): Promise<`0x${string}`>;\n  waitForTransactionReceipt(args: { hash: `0x${string}` }): Promise<{ status: string }>;\n  getCode(args: { address: `0x${string}` }): Promise<`0x${string}` | undefined>;\n};\n\n/**\n * Converts a signer to a ClientEvmSigner\n *\n * @param signer - The signer to convert to a ClientEvmSigner\n * @returns The converted signer\n */\nexport function toClientEvmSigner(signer: ClientEvmSigner): ClientEvmSigner {\n  return signer;\n}\n\n/**\n * Converts a viem client with single address to a FacilitatorEvmSigner\n * Wraps the single address in a getAddresses() function for compatibility\n *\n * @param client - The client to convert (must have 'address' property)\n * @returns FacilitatorEvmSigner with getAddresses() support\n */\nexport function toFacilitatorEvmSigner(\n  client: Omit<FacilitatorEvmSigner, \"getAddresses\"> & { address: `0x${string}` },\n): FacilitatorEvmSigner {\n  return {\n    ...client,\n    getAddresses: () => [client.address],\n  };\n}\n"],"mappings":";;;;;;AA4DO,SAAS,kBAAkB,QAA0C;AAC1E,SAAO;AACT;AASO,SAAS,uBACd,QACsB;AACtB,SAAO;AAAA,IACL,GAAG;AAAA,IACH,cAAc,MAAM,CAAC,OAAO,OAAO;AAAA,EACrC;AACF;","names":[]}
+{"version":3,"sources":["../../src/signer.ts"],"sourcesContent":["/**\n * ClientEvmSigner - Used by x402 clients to sign payment authorizations\n * This is typically a LocalAccount or wallet that holds private keys\n * and can sign EIP-712 typed data for payment authorizations\n */\nexport type ClientEvmSigner = {\n  readonly address: `0x${string}`;\n  signTypedData(message: {\n    domain: Record<string, unknown>;\n    types: Record<string, unknown>;\n    primaryType: string;\n    message: Record<string, unknown>;\n  }): Promise<`0x${string}`>;\n};\n\n/**\n * FacilitatorEvmSigner - Used by x402 facilitators to verify and settle payments\n * This is typically a viem PublicClient + WalletClient combination that can\n * read contract state, verify signatures, write transactions, and wait for receipts\n *\n * Supports multiple addresses for load balancing, key rotation, and high availability\n */\nexport type FacilitatorEvmSigner = {\n  /**\n   * Get all addresses this facilitator can use for signing\n   * Enables dynamic address selection for load balancing and key rotation\n   */\n  getAddresses(): readonly `0x${string}`[];\n\n  readContract(args: {\n    address: `0x${string}`;\n    abi: readonly unknown[];\n    functionName: string;\n    args?: readonly unknown[];\n  }): Promise<unknown>;\n  verifyTypedData(args: {\n    address: `0x${string}`;\n    domain: Record<string, unknown>;\n    types: Record<string, unknown>;\n    primaryType: string;\n    message: Record<string, unknown>;\n    signature: `0x${string}`;\n  }): Promise<boolean>;\n  writeContract(args: {\n    address: `0x${string}`;\n    abi: readonly unknown[];\n    functionName: string;\n    args: readonly unknown[];\n  }): Promise<`0x${string}`>;\n  sendTransaction(args: { to: `0x${string}`; data: `0x${string}` }): Promise<`0x${string}`>;\n  waitForTransactionReceipt(args: { hash: `0x${string}` }): Promise<{ status: string }>;\n  getCode(args: { address: `0x${string}` }): Promise<`0x${string}` | undefined>;\n};\n\n/**\n * Converts a signer to a ClientEvmSigner\n *\n * @param signer - The signer to convert to a ClientEvmSigner\n * @returns The converted signer\n */\nexport function toClientEvmSigner(signer: ClientEvmSigner): ClientEvmSigner {\n  return signer;\n}\n\n/**\n * Converts a viem client with single address to a FacilitatorEvmSigner\n * Wraps the single address in a getAddresses() function for compatibility\n *\n * @param client - The client to convert (must have 'address' property)\n * @returns FacilitatorEvmSigner with getAddresses() support\n */\nexport function toFacilitatorEvmSigner(\n  client: Omit<FacilitatorEvmSigner, \"getAddresses\"> & { address: `0x${string}` },\n): FacilitatorEvmSigner {\n  return {\n    ...client,\n    getAddresses: () => [client.address],\n  };\n}\n"],"mappings":";;;;;;;;;;;;;;;;;;;;;AA4DO,SAAS,kBAAkB,QAA0C;AAC1E,SAAO;AACT;AASO,SAAS,uBACd,QACsB;AACtB,SAAO;AAAA,IACL,GAAG;AAAA,IACH,cAAc,MAAM,CAAC,OAAO,OAAO;AAAA,EACrC;AACF;","names":[]}

dist/esm/v1/index.d.mts

@@ -5,4 +5,24 @@ export { ExactEvmSchemeV1 } from '../exact/v1/client/index.mjs';
 
+declare const EVM_NETWORK_CHAIN_ID_MAP: {
+    readonly ethereum: 1;
+    readonly sepolia: 11155111;
+    readonly abstract: 2741;
+    readonly "abstract-testnet": 11124;
+    readonly "base-sepolia": 84532;
+    readonly base: 8453;
+    readonly "avalanche-fuji": 43113;
+    readonly avalanche: 43114;
+    readonly iotex: 4689;
+    readonly sei: 1329;
+    readonly "sei-testnet": 1328;
+    readonly polygon: 137;
+    readonly "polygon-amoy": 80002;
+    readonly peaq: 3338;
+    readonly story: 1514;
+    readonly educhain: 41923;
+    readonly "skale-base-sepolia": 324705682;
+};
+type EvmNetworkV1 = keyof typeof EVM_NETWORK_CHAIN_ID_MAP;
 declare const NETWORKS: string[];
 
-export { NETWORKS };
+export { EVM_NETWORK_CHAIN_ID_MAP, type EvmNetworkV1, NETWORKS };

dist/esm/v1/index.mjs

 import {
+  EVM_NETWORK_CHAIN_ID_MAP,
+  ExactEvmSchemeV1,
   NETWORKS
-} from "../chunk-QLXM7BIB.mjs";
-import {
-  ExactEvmSchemeV1
-} from "../chunk-PSA4YVU2.mjs";
-import "../chunk-JYZWCLMP.mjs";
-import "../chunk-ZYXTTU74.mjs";
+} from "../chunk-DSSJHWGT.mjs";
 export {
+  EVM_NETWORK_CHAIN_ID_MAP,
   ExactEvmSchemeV1,
@@ -11,0 +9,0 @@ NETWORKS

package.json

 {
   "name": "@x402/evm",
-  "version": "2.2.0",
+  "version": "2.3.0",
   "main": "./dist/cjs/index.js",
@@ -38,3 +38,3 @@ "module": "./dist/esm/index.js",
     "zod": "^3.24.2",
-    "@x402/core": "^2.2.0"
+    "@x402/core": "~2.3.0"
   },
@@ -41,0 +41,0 @@ "exports": {

dist/esm/chunk-FOUXRQAV.mjs

-import {
-  authorizationTypes,
-  createNonce
-} from "./chunk-ZYXTTU74.mjs";
-
-// src/exact/client/scheme.ts
-import { getAddress } from "viem";
-var ExactEvmScheme = class {
-  /**
-   * Creates a new ExactEvmClient instance.
-   *
-   * @param signer - The EVM signer for client operations
-   */
-  constructor(signer) {
-    this.signer = signer;
-    this.scheme = "exact";
-  }
-  /**
-   * Creates a payment payload for the Exact scheme.
-   *
-   * @param x402Version - The x402 protocol version
-   * @param paymentRequirements - The payment requirements
-   * @returns Promise resolving to a payment payload
-   */
-  async createPaymentPayload(x402Version, paymentRequirements) {
-    const nonce = createNonce();
-    const now = Math.floor(Date.now() / 1e3);
-    const authorization = {
-      from: this.signer.address,
-      to: getAddress(paymentRequirements.payTo),
-      value: paymentRequirements.amount,
-      validAfter: (now - 600).toString(),
-      // 10 minutes before
-      validBefore: (now + paymentRequirements.maxTimeoutSeconds).toString(),
-      nonce
-    };
-    const signature = await this.signAuthorization(authorization, paymentRequirements);
-    const payload = {
-      authorization,
-      signature
-    };
-    return {
-      x402Version,
-      payload
-    };
-  }
-  /**
-   * Sign the EIP-3009 authorization using EIP-712
-   *
-   * @param authorization - The authorization to sign
-   * @param requirements - The payment requirements
-   * @returns Promise resolving to the signature
-   */
-  async signAuthorization(authorization, requirements) {
-    const chainId = parseInt(requirements.network.split(":")[1]);
-    if (!requirements.extra?.name || !requirements.extra?.version) {
-      throw new Error(
-        `EIP-712 domain parameters (name, version) are required in payment requirements for asset ${requirements.asset}`
-      );
-    }
-    const { name, version } = requirements.extra;
-    const domain = {
-      name,
-      version,
-      chainId,
-      verifyingContract: getAddress(requirements.asset)
-    };
-    const message = {
-      from: getAddress(authorization.from),
-      to: getAddress(authorization.to),
-      value: BigInt(authorization.value),
-      validAfter: BigInt(authorization.validAfter),
-      validBefore: BigInt(authorization.validBefore),
-      nonce: authorization.nonce
-    };
-    return await this.signer.signTypedData({
-      domain,
-      types: authorizationTypes,
-      primaryType: "TransferWithAuthorization",
-      message
-    });
-  }
-};
-
-export {
-  ExactEvmScheme
-};
-//# sourceMappingURL=chunk-FOUXRQAV.mjs.map

dist/esm/chunk-FOUXRQAV.mjs.map

-{"version":3,"sources":["../../src/exact/client/scheme.ts"],"sourcesContent":["import { PaymentPayload, PaymentRequirements, SchemeNetworkClient } from \"@x402/core/types\";\nimport { getAddress } from \"viem\";\nimport { authorizationTypes } from \"../../constants\";\nimport { ClientEvmSigner } from \"../../signer\";\nimport { ExactEvmPayloadV2 } from \"../../types\";\nimport { createNonce } from \"../../utils\";\n\n/**\n * EVM client implementation for the Exact payment scheme.\n *\n */\nexport class ExactEvmScheme implements SchemeNetworkClient {\n  readonly scheme = \"exact\";\n\n  /**\n   * Creates a new ExactEvmClient instance.\n   *\n   * @param signer - The EVM signer for client operations\n   */\n  constructor(private readonly signer: ClientEvmSigner) {}\n\n  /**\n   * Creates a payment payload for the Exact scheme.\n   *\n   * @param x402Version - The x402 protocol version\n   * @param paymentRequirements - The payment requirements\n   * @returns Promise resolving to a payment payload\n   */\n  async createPaymentPayload(\n    x402Version: number,\n    paymentRequirements: PaymentRequirements,\n  ): Promise<Pick<PaymentPayload, \"x402Version\" | \"payload\">> {\n    const nonce = createNonce();\n    const now = Math.floor(Date.now() / 1000);\n\n    const authorization: ExactEvmPayloadV2[\"authorization\"] = {\n      from: this.signer.address,\n      to: getAddress(paymentRequirements.payTo),\n      value: paymentRequirements.amount,\n      validAfter: (now - 600).toString(), // 10 minutes before\n      validBefore: (now + paymentRequirements.maxTimeoutSeconds).toString(),\n      nonce,\n    };\n\n    // Sign the authorization\n    const signature = await this.signAuthorization(authorization, paymentRequirements);\n\n    const payload: ExactEvmPayloadV2 = {\n      authorization,\n      signature,\n    };\n\n    return {\n      x402Version,\n      payload,\n    };\n  }\n\n  /**\n   * Sign the EIP-3009 authorization using EIP-712\n   *\n   * @param authorization - The authorization to sign\n   * @param requirements - The payment requirements\n   * @returns Promise resolving to the signature\n   */\n  private async signAuthorization(\n    authorization: ExactEvmPayloadV2[\"authorization\"],\n    requirements: PaymentRequirements,\n  ): Promise<`0x${string}`> {\n    const chainId = parseInt(requirements.network.split(\":\")[1]);\n\n    if (!requirements.extra?.name || !requirements.extra?.version) {\n      throw new Error(\n        `EIP-712 domain parameters (name, version) are required in payment requirements for asset ${requirements.asset}`,\n      );\n    }\n\n    const { name, version } = requirements.extra;\n\n    const domain = {\n      name,\n      version,\n      chainId,\n      verifyingContract: getAddress(requirements.asset),\n    };\n\n    const message = {\n      from: getAddress(authorization.from),\n      to: getAddress(authorization.to),\n      value: BigInt(authorization.value),\n      validAfter: BigInt(authorization.validAfter),\n      validBefore: BigInt(authorization.validBefore),\n      nonce: authorization.nonce,\n    };\n\n    return await this.signer.signTypedData({\n      domain,\n      types: authorizationTypes,\n      primaryType: \"TransferWithAuthorization\",\n      message,\n    });\n  }\n}\n"],"mappings":";;;;;;AACA,SAAS,kBAAkB;AAUpB,IAAM,iBAAN,MAAoD;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA,EAQzD,YAA6B,QAAyB;AAAzB;AAP7B,SAAS,SAAS;AAAA,EAOqC;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA,EASvD,MAAM,qBACJ,aACA,qBAC0D;AAC1D,UAAM,QAAQ,YAAY;AAC1B,UAAM,MAAM,KAAK,MAAM,KAAK,IAAI,IAAI,GAAI;AAExC,UAAM,gBAAoD;AAAA,MACxD,MAAM,KAAK,OAAO;AAAA,MAClB,IAAI,WAAW,oBAAoB,KAAK;AAAA,MACxC,OAAO,oBAAoB;AAAA,MAC3B,aAAa,MAAM,KAAK,SAAS;AAAA;AAAA,MACjC,cAAc,MAAM,oBAAoB,mBAAmB,SAAS;AAAA,MACpE;AAAA,IACF;AAGA,UAAM,YAAY,MAAM,KAAK,kBAAkB,eAAe,mBAAmB;AAEjF,UAAM,UAA6B;AAAA,MACjC;AAAA,MACA;AAAA,IACF;AAEA,WAAO;AAAA,MACL;AAAA,MACA;AAAA,IACF;AAAA,EACF;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA,EASA,MAAc,kBACZ,eACA,cACwB;AACxB,UAAM,UAAU,SAAS,aAAa,QAAQ,MAAM,GAAG,EAAE,CAAC,CAAC;AAE3D,QAAI,CAAC,aAAa,OAAO,QAAQ,CAAC,aAAa,OAAO,SAAS;AAC7D,YAAM,IAAI;AAAA,QACR,4FAA4F,aAAa,KAAK;AAAA,MAChH;AAAA,IACF;AAEA,UAAM,EAAE,MAAM,QAAQ,IAAI,aAAa;AAEvC,UAAM,SAAS;AAAA,MACb;AAAA,MACA;AAAA,MACA;AAAA,MACA,mBAAmB,WAAW,aAAa,KAAK;AAAA,IAClD;AAEA,UAAM,UAAU;AAAA,MACd,MAAM,WAAW,cAAc,IAAI;AAAA,MACnC,IAAI,WAAW,cAAc,EAAE;AAAA,MAC/B,OAAO,OAAO,cAAc,KAAK;AAAA,MACjC,YAAY,OAAO,cAAc,UAAU;AAAA,MAC3C,aAAa,OAAO,cAAc,WAAW;AAAA,MAC7C,OAAO,cAAc;AAAA,IACvB;AAEA,WAAO,MAAM,KAAK,OAAO,cAAc;AAAA,MACrC;AAAA,MACA,OAAO;AAAA,MACP,aAAa;AAAA,MACb;AAAA,IACF,CAAC;AAAA,EACH;AACF;","names":[]}

dist/esm/chunk-JYZWCLMP.mjs

-import {
-  authorizationTypes,
-  eip3009ABI,
-  getEvmChainId
-} from "./chunk-ZYXTTU74.mjs";
-
-// src/exact/v1/facilitator/scheme.ts
-import { getAddress, isAddressEqual, parseErc6492Signature, parseSignature } from "viem";
-var ExactEvmSchemeV1 = class {
-  /**
-   * Creates a new ExactEvmFacilitatorV1 instance.
-   *
-   * @param signer - The EVM signer for facilitator operations
-   * @param config - Optional configuration for the facilitator
-   */
-  constructor(signer, config) {
-    this.signer = signer;
-    this.scheme = "exact";
-    this.caipFamily = "eip155:*";
-    this.config = {
-      deployERC4337WithEIP6492: config?.deployERC4337WithEIP6492 ?? false
-    };
-  }
-  /**
-   * Get mechanism-specific extra data for the supported kinds endpoint.
-   * For EVM, no extra data is needed.
-   *
-   * @param _ - The network identifier (unused for EVM)
-   * @returns undefined (EVM has no extra data)
-   */
-  getExtra(_) {
-    return void 0;
-  }
-  /**
-   * Get signer addresses used by this facilitator.
-   * Returns all addresses this facilitator can use for signing/settling transactions.
-   *
-   * @param _ - The network identifier (unused for EVM, addresses are network-agnostic)
-   * @returns Array of facilitator wallet addresses
-   */
-  getSigners(_) {
-    return [...this.signer.getAddresses()];
-  }
-  /**
-   * Verifies a payment payload (V1).
-   *
-   * @param payload - The payment payload to verify
-   * @param requirements - The payment requirements
-   * @returns Promise resolving to verification response
-   */
-  async verify(payload, requirements) {
-    const requirementsV1 = requirements;
-    const payloadV1 = payload;
-    const exactEvmPayload = payload.payload;
-    if (payloadV1.scheme !== "exact" || requirements.scheme !== "exact") {
-      return {
-        isValid: false,
-        invalidReason: "unsupported_scheme",
-        payer: exactEvmPayload.authorization.from
-      };
-    }
-    const chainId = getEvmChainId(payloadV1.network);
-    if (!requirements.extra?.name || !requirements.extra?.version) {
-      return {
-        isValid: false,
-        invalidReason: "missing_eip712_domain",
-        payer: exactEvmPayload.authorization.from
-      };
-    }
-    const { name, version } = requirements.extra;
-    const erc20Address = getAddress(requirements.asset);
-    if (payloadV1.network !== requirements.network) {
-      return {
-        isValid: false,
-        invalidReason: "network_mismatch",
-        payer: exactEvmPayload.authorization.from
-      };
-    }
-    const permitTypedData = {
-      types: authorizationTypes,
-      primaryType: "TransferWithAuthorization",
-      domain: {
-        name,
-        version,
-        chainId,
-        verifyingContract: erc20Address
-      },
-      message: {
-        from: exactEvmPayload.authorization.from,
-        to: exactEvmPayload.authorization.to,
-        value: BigInt(exactEvmPayload.authorization.value),
-        validAfter: BigInt(exactEvmPayload.authorization.validAfter),
-        validBefore: BigInt(exactEvmPayload.authorization.validBefore),
-        nonce: exactEvmPayload.authorization.nonce
-      }
-    };
-    try {
-      const recoveredAddress = await this.signer.verifyTypedData({
-        address: exactEvmPayload.authorization.from,
-        ...permitTypedData,
-        signature: exactEvmPayload.signature
-      });
-      if (!recoveredAddress) {
-        return {
-          isValid: false,
-          invalidReason: "invalid_exact_evm_payload_signature",
-          payer: exactEvmPayload.authorization.from
-        };
-      }
-    } catch {
-      const signature = exactEvmPayload.signature;
-      const signatureLength = signature.startsWith("0x") ? signature.length - 2 : signature.length;
-      const isSmartWallet = signatureLength > 130;
-      if (isSmartWallet) {
-        const payerAddress = exactEvmPayload.authorization.from;
-        const bytecode = await this.signer.getCode({ address: payerAddress });
-        if (!bytecode || bytecode === "0x") {
-          const erc6492Data = parseErc6492Signature(signature);
-          const hasDeploymentInfo = erc6492Data.address && erc6492Data.data && !isAddressEqual(erc6492Data.address, "0x0000000000000000000000000000000000000000");
-          if (!hasDeploymentInfo) {
-            return {
-              isValid: false,
-              invalidReason: "invalid_exact_evm_payload_undeployed_smart_wallet",
-              payer: payerAddress
-            };
-          }
-        } else {
-          return {
-            isValid: false,
-            invalidReason: "invalid_exact_evm_payload_signature",
-            payer: exactEvmPayload.authorization.from
-          };
-        }
-      } else {
-        return {
-          isValid: false,
-          invalidReason: "invalid_exact_evm_payload_signature",
-          payer: exactEvmPayload.authorization.from
-        };
-      }
-    }
-    if (getAddress(exactEvmPayload.authorization.to) !== getAddress(requirements.payTo)) {
-      return {
-        isValid: false,
-        invalidReason: "invalid_exact_evm_payload_recipient_mismatch",
-        payer: exactEvmPayload.authorization.from
-      };
-    }
-    const now = Math.floor(Date.now() / 1e3);
-    if (BigInt(exactEvmPayload.authorization.validBefore) < BigInt(now + 6)) {
-      return {
-        isValid: false,
-        invalidReason: "invalid_exact_evm_payload_authorization_valid_before",
-        payer: exactEvmPayload.authorization.from
-      };
-    }
-    if (BigInt(exactEvmPayload.authorization.validAfter) > BigInt(now)) {
-      return {
-        isValid: false,
-        invalidReason: "invalid_exact_evm_payload_authorization_valid_after",
-        payer: exactEvmPayload.authorization.from
-      };
-    }
-    try {
-      const balance = await this.signer.readContract({
-        address: erc20Address,
-        abi: eip3009ABI,
-        functionName: "balanceOf",
-        args: [exactEvmPayload.authorization.from]
-      });
-      if (BigInt(balance) < BigInt(requirementsV1.maxAmountRequired)) {
-        return {
-          isValid: false,
-          invalidReason: "insufficient_funds",
-          payer: exactEvmPayload.authorization.from
-        };
-      }
-    } catch {
-    }
-    if (BigInt(exactEvmPayload.authorization.value) < BigInt(requirementsV1.maxAmountRequired)) {
-      return {
-        isValid: false,
-        invalidReason: "invalid_exact_evm_payload_authorization_value",
-        payer: exactEvmPayload.authorization.from
-      };
-    }
-    return {
-      isValid: true,
-      invalidReason: void 0,
-      payer: exactEvmPayload.authorization.from
-    };
-  }
-  /**
-   * Settles a payment by executing the transfer (V1).
-   *
-   * @param payload - The payment payload to settle
-   * @param requirements - The payment requirements
-   * @returns Promise resolving to settlement response
-   */
-  async settle(payload, requirements) {
-    const payloadV1 = payload;
-    const exactEvmPayload = payload.payload;
-    const valid = await this.verify(payload, requirements);
-    if (!valid.isValid) {
-      return {
-        success: false,
-        network: payloadV1.network,
-        transaction: "",
-        errorReason: valid.invalidReason ?? "invalid_scheme",
-        payer: exactEvmPayload.authorization.from
-      };
-    }
-    try {
-      const parseResult = parseErc6492Signature(exactEvmPayload.signature);
-      const { signature, address: factoryAddress, data: factoryCalldata } = parseResult;
-      if (this.config.deployERC4337WithEIP6492 && factoryAddress && factoryCalldata && !isAddressEqual(factoryAddress, "0x0000000000000000000000000000000000000000")) {
-        const payerAddress = exactEvmPayload.authorization.from;
-        const bytecode = await this.signer.getCode({ address: payerAddress });
-        if (!bytecode || bytecode === "0x") {
-          try {
-            console.log(`Deploying ERC-4337 smart wallet for ${payerAddress} via EIP-6492`);
-            const deployTx = await this.signer.sendTransaction({
-              to: factoryAddress,
-              data: factoryCalldata
-            });
-            await this.signer.waitForTransactionReceipt({ hash: deployTx });
-            console.log(`Successfully deployed smart wallet for ${payerAddress}`);
-          } catch (deployError) {
-            console.error("Smart wallet deployment failed:", deployError);
-            throw deployError;
-          }
-        } else {
-          console.log(`Smart wallet for ${payerAddress} already deployed, skipping deployment`);
-        }
-      }
-      const signatureLength = signature.startsWith("0x") ? signature.length - 2 : signature.length;
-      const isECDSA = signatureLength === 130;
-      let tx;
-      if (isECDSA) {
-        const parsedSig = parseSignature(signature);
-        tx = await this.signer.writeContract({
-          address: getAddress(requirements.asset),
-          abi: eip3009ABI,
-          functionName: "transferWithAuthorization",
-          args: [
-            getAddress(exactEvmPayload.authorization.from),
-            getAddress(exactEvmPayload.authorization.to),
-            BigInt(exactEvmPayload.authorization.value),
-            BigInt(exactEvmPayload.authorization.validAfter),
-            BigInt(exactEvmPayload.authorization.validBefore),
-            exactEvmPayload.authorization.nonce,
-            parsedSig.v || parsedSig.yParity,
-            parsedSig.r,
-            parsedSig.s
-          ]
-        });
-      } else {
-        tx = await this.signer.writeContract({
-          address: getAddress(requirements.asset),
-          abi: eip3009ABI,
-          functionName: "transferWithAuthorization",
-          args: [
-            getAddress(exactEvmPayload.authorization.from),
-            getAddress(exactEvmPayload.authorization.to),
-            BigInt(exactEvmPayload.authorization.value),
-            BigInt(exactEvmPayload.authorization.validAfter),
-            BigInt(exactEvmPayload.authorization.validBefore),
-            exactEvmPayload.authorization.nonce,
-            signature
-          ]
-        });
-      }
-      const receipt = await this.signer.waitForTransactionReceipt({ hash: tx });
-      if (receipt.status !== "success") {
-        return {
-          success: false,
-          errorReason: "invalid_transaction_state",
-          transaction: tx,
-          network: payloadV1.network,
-          payer: exactEvmPayload.authorization.from
-        };
-      }
-      return {
-        success: true,
-        transaction: tx,
-        network: payloadV1.network,
-        payer: exactEvmPayload.authorization.from
-      };
-    } catch (error) {
-      console.error("Failed to settle transaction:", error);
-      return {
-        success: false,
-        errorReason: "transaction_failed",
-        transaction: "",
-        network: payloadV1.network,
-        payer: exactEvmPayload.authorization.from
-      };
-    }
-  }
-};
-
-export {
-  ExactEvmSchemeV1
-};
-//# sourceMappingURL=chunk-JYZWCLMP.mjs.map

dist/esm/chunk-JYZWCLMP.mjs.map

-{"version":3,"sources":["../../src/exact/v1/facilitator/scheme.ts"],"sourcesContent":["import {\n  PaymentPayload,\n  PaymentPayloadV1,\n  PaymentRequirements,\n  SchemeNetworkFacilitator,\n  SettleResponse,\n  VerifyResponse,\n} from \"@x402/core/types\";\nimport { PaymentRequirementsV1 } from \"@x402/core/types/v1\";\nimport { getAddress, Hex, isAddressEqual, parseErc6492Signature, parseSignature } from \"viem\";\nimport { authorizationTypes, eip3009ABI } from \"../../../constants\";\nimport { FacilitatorEvmSigner } from \"../../../signer\";\nimport { ExactEvmPayloadV1 } from \"../../../types\";\nimport { getEvmChainId } from \"../../../utils\";\n\nexport interface ExactEvmSchemeV1Config {\n  /**\n   * If enabled, the facilitator will deploy ERC-4337 smart wallets\n   * via EIP-6492 when encountering undeployed contract signatures.\n   *\n   * @default false\n   */\n  deployERC4337WithEIP6492?: boolean;\n}\n\n/**\n * EVM facilitator implementation for the Exact payment scheme (V1).\n */\nexport class ExactEvmSchemeV1 implements SchemeNetworkFacilitator {\n  readonly scheme = \"exact\";\n  readonly caipFamily = \"eip155:*\";\n  private readonly config: Required<ExactEvmSchemeV1Config>;\n\n  /**\n   * Creates a new ExactEvmFacilitatorV1 instance.\n   *\n   * @param signer - The EVM signer for facilitator operations\n   * @param config - Optional configuration for the facilitator\n   */\n  constructor(\n    private readonly signer: FacilitatorEvmSigner,\n    config?: ExactEvmSchemeV1Config,\n  ) {\n    this.config = {\n      deployERC4337WithEIP6492: config?.deployERC4337WithEIP6492 ?? false,\n    };\n  }\n\n  /**\n   * Get mechanism-specific extra data for the supported kinds endpoint.\n   * For EVM, no extra data is needed.\n   *\n   * @param _ - The network identifier (unused for EVM)\n   * @returns undefined (EVM has no extra data)\n   */\n  getExtra(_: string): Record<string, unknown> | undefined {\n    return undefined;\n  }\n\n  /**\n   * Get signer addresses used by this facilitator.\n   * Returns all addresses this facilitator can use for signing/settling transactions.\n   *\n   * @param _ - The network identifier (unused for EVM, addresses are network-agnostic)\n   * @returns Array of facilitator wallet addresses\n   */\n  getSigners(_: string): string[] {\n    return [...this.signer.getAddresses()];\n  }\n\n  /**\n   * Verifies a payment payload (V1).\n   *\n   * @param payload - The payment payload to verify\n   * @param requirements - The payment requirements\n   * @returns Promise resolving to verification response\n   */\n  async verify(\n    payload: PaymentPayload,\n    requirements: PaymentRequirements,\n  ): Promise<VerifyResponse> {\n    const requirementsV1 = requirements as unknown as PaymentRequirementsV1;\n    const payloadV1 = payload as unknown as PaymentPayloadV1;\n    const exactEvmPayload = payload.payload as ExactEvmPayloadV1;\n\n    // Verify scheme matches\n    if (payloadV1.scheme !== \"exact\" || requirements.scheme !== \"exact\") {\n      return {\n        isValid: false,\n        invalidReason: \"unsupported_scheme\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Get chain configuration\n    const chainId = getEvmChainId(payloadV1.network);\n\n    if (!requirements.extra?.name || !requirements.extra?.version) {\n      return {\n        isValid: false,\n        invalidReason: \"missing_eip712_domain\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    const { name, version } = requirements.extra;\n    const erc20Address = getAddress(requirements.asset);\n\n    // Verify network matches\n    if (payloadV1.network !== requirements.network) {\n      return {\n        isValid: false,\n        invalidReason: \"network_mismatch\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Build typed data for signature verification\n    const permitTypedData = {\n      types: authorizationTypes,\n      primaryType: \"TransferWithAuthorization\" as const,\n      domain: {\n        name,\n        version,\n        chainId,\n        verifyingContract: erc20Address,\n      },\n      message: {\n        from: exactEvmPayload.authorization.from,\n        to: exactEvmPayload.authorization.to,\n        value: BigInt(exactEvmPayload.authorization.value),\n        validAfter: BigInt(exactEvmPayload.authorization.validAfter),\n        validBefore: BigInt(exactEvmPayload.authorization.validBefore),\n        nonce: exactEvmPayload.authorization.nonce,\n      },\n    };\n\n    // Verify signature\n    try {\n      const recoveredAddress = await this.signer.verifyTypedData({\n        address: exactEvmPayload.authorization.from,\n        ...permitTypedData,\n        signature: exactEvmPayload.signature!,\n      });\n\n      if (!recoveredAddress) {\n        return {\n          isValid: false,\n          invalidReason: \"invalid_exact_evm_payload_signature\",\n          payer: exactEvmPayload.authorization.from,\n        };\n      }\n    } catch {\n      // Signature verification failed - could be an undeployed smart wallet\n      // Check if smart wallet is deployed\n      const signature = exactEvmPayload.signature!;\n      const signatureLength = signature.startsWith(\"0x\") ? signature.length - 2 : signature.length;\n      const isSmartWallet = signatureLength > 130; // 65 bytes = 130 hex chars for EOA\n\n      if (isSmartWallet) {\n        const payerAddress = exactEvmPayload.authorization.from;\n        const bytecode = await this.signer.getCode({ address: payerAddress });\n\n        if (!bytecode || bytecode === \"0x\") {\n          // Wallet is not deployed. Check if it's EIP-6492 with deployment info.\n          // EIP-6492 signatures contain factory address and calldata needed for deployment.\n          // Non-EIP-6492 undeployed wallets cannot succeed (no way to deploy them).\n          const erc6492Data = parseErc6492Signature(signature);\n          const hasDeploymentInfo =\n            erc6492Data.address &&\n            erc6492Data.data &&\n            !isAddressEqual(erc6492Data.address, \"0x0000000000000000000000000000000000000000\");\n\n          if (!hasDeploymentInfo) {\n            // Non-EIP-6492 undeployed smart wallet - will always fail at settlement\n            // since EIP-3009 requires on-chain EIP-1271 validation\n            return {\n              isValid: false,\n              invalidReason: \"invalid_exact_evm_payload_undeployed_smart_wallet\",\n              payer: payerAddress,\n            };\n          }\n          // EIP-6492 signature with deployment info - allow through\n          // Facilitators with sponsored deployment support can handle this in settle()\n        } else {\n          // Wallet is deployed but signature still failed - invalid signature\n          return {\n            isValid: false,\n            invalidReason: \"invalid_exact_evm_payload_signature\",\n            payer: exactEvmPayload.authorization.from,\n          };\n        }\n      } else {\n        // EOA signature failed\n        return {\n          isValid: false,\n          invalidReason: \"invalid_exact_evm_payload_signature\",\n          payer: exactEvmPayload.authorization.from,\n        };\n      }\n    }\n\n    // Verify payment recipient matches\n    if (getAddress(exactEvmPayload.authorization.to) !== getAddress(requirements.payTo)) {\n      return {\n        isValid: false,\n        invalidReason: \"invalid_exact_evm_payload_recipient_mismatch\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Verify validBefore is in the future (with 6 second buffer for block time)\n    const now = Math.floor(Date.now() / 1000);\n    if (BigInt(exactEvmPayload.authorization.validBefore) < BigInt(now + 6)) {\n      return {\n        isValid: false,\n        invalidReason: \"invalid_exact_evm_payload_authorization_valid_before\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Verify validAfter is not in the future\n    if (BigInt(exactEvmPayload.authorization.validAfter) > BigInt(now)) {\n      return {\n        isValid: false,\n        invalidReason: \"invalid_exact_evm_payload_authorization_valid_after\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    // Check balance\n    try {\n      const balance = (await this.signer.readContract({\n        address: erc20Address,\n        abi: eip3009ABI,\n        functionName: \"balanceOf\",\n        args: [exactEvmPayload.authorization.from],\n      })) as bigint;\n\n      if (BigInt(balance) < BigInt(requirementsV1.maxAmountRequired)) {\n        return {\n          isValid: false,\n          invalidReason: \"insufficient_funds\",\n          payer: exactEvmPayload.authorization.from,\n        };\n      }\n    } catch {\n      // If we can't check balance, continue with other validations\n    }\n\n    // Verify amount is sufficient\n    if (BigInt(exactEvmPayload.authorization.value) < BigInt(requirementsV1.maxAmountRequired)) {\n      return {\n        isValid: false,\n        invalidReason: \"invalid_exact_evm_payload_authorization_value\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    return {\n      isValid: true,\n      invalidReason: undefined,\n      payer: exactEvmPayload.authorization.from,\n    };\n  }\n\n  /**\n   * Settles a payment by executing the transfer (V1).\n   *\n   * @param payload - The payment payload to settle\n   * @param requirements - The payment requirements\n   * @returns Promise resolving to settlement response\n   */\n  async settle(\n    payload: PaymentPayload,\n    requirements: PaymentRequirements,\n  ): Promise<SettleResponse> {\n    const payloadV1 = payload as unknown as PaymentPayloadV1;\n    const exactEvmPayload = payload.payload as ExactEvmPayloadV1;\n\n    // Re-verify before settling\n    const valid = await this.verify(payload, requirements);\n    if (!valid.isValid) {\n      return {\n        success: false,\n        network: payloadV1.network,\n        transaction: \"\",\n        errorReason: valid.invalidReason ?? \"invalid_scheme\",\n        payer: exactEvmPayload.authorization.from,\n      };\n    }\n\n    try {\n      // Parse ERC-6492 signature if applicable\n      const parseResult = parseErc6492Signature(exactEvmPayload.signature!);\n      const { signature, address: factoryAddress, data: factoryCalldata } = parseResult;\n\n      // Deploy ERC-4337 smart wallet via EIP-6492 if configured and needed\n      if (\n        this.config.deployERC4337WithEIP6492 &&\n        factoryAddress &&\n        factoryCalldata &&\n        !isAddressEqual(factoryAddress, \"0x0000000000000000000000000000000000000000\")\n      ) {\n        // Check if smart wallet is already deployed\n        const payerAddress = exactEvmPayload.authorization.from;\n        const bytecode = await this.signer.getCode({ address: payerAddress });\n\n        if (!bytecode || bytecode === \"0x\") {\n          // Wallet not deployed - attempt deployment\n          try {\n            console.log(`Deploying ERC-4337 smart wallet for ${payerAddress} via EIP-6492`);\n\n            // Send the factory calldata directly as a transaction\n            // The factoryCalldata already contains the complete encoded function call\n            const deployTx = await this.signer.sendTransaction({\n              to: factoryAddress as Hex,\n              data: factoryCalldata as Hex,\n            });\n\n            // Wait for deployment transaction\n            await this.signer.waitForTransactionReceipt({ hash: deployTx });\n            console.log(`Successfully deployed smart wallet for ${payerAddress}`);\n          } catch (deployError) {\n            console.error(\"Smart wallet deployment failed:\", deployError);\n            // Deployment failed - cannot proceed\n            throw deployError;\n          }\n        } else {\n          console.log(`Smart wallet for ${payerAddress} already deployed, skipping deployment`);\n        }\n      }\n\n      // Determine if this is an ECDSA signature (EOA) or smart wallet signature\n      // ECDSA signatures are exactly 65 bytes (130 hex chars without 0x)\n      const signatureLength = signature.startsWith(\"0x\") ? signature.length - 2 : signature.length;\n      const isECDSA = signatureLength === 130;\n\n      let tx: Hex;\n      if (isECDSA) {\n        // For EOA wallets, parse signature into v, r, s and use that overload\n        const parsedSig = parseSignature(signature);\n\n        tx = await this.signer.writeContract({\n          address: getAddress(requirements.asset),\n          abi: eip3009ABI,\n          functionName: \"transferWithAuthorization\",\n          args: [\n            getAddress(exactEvmPayload.authorization.from),\n            getAddress(exactEvmPayload.authorization.to),\n            BigInt(exactEvmPayload.authorization.value),\n            BigInt(exactEvmPayload.authorization.validAfter),\n            BigInt(exactEvmPayload.authorization.validBefore),\n            exactEvmPayload.authorization.nonce,\n            (parsedSig.v as number | undefined) || parsedSig.yParity,\n            parsedSig.r,\n            parsedSig.s,\n          ],\n        });\n      } else {\n        // For smart wallets, use the bytes signature overload\n        // The signature contains WebAuthn/P256 or other ERC-1271 compatible signature data\n        tx = await this.signer.writeContract({\n          address: getAddress(requirements.asset),\n          abi: eip3009ABI,\n          functionName: \"transferWithAuthorization\",\n   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dist/esm/chunk-PSA4YVU2.mjs

-import {
-  authorizationTypes,
-  createNonce,
-  getEvmChainId
-} from "./chunk-ZYXTTU74.mjs";
-
-// src/exact/v1/client/scheme.ts
-import { getAddress } from "viem";
-var ExactEvmSchemeV1 = class {
-  /**
-   * Creates a new ExactEvmClientV1 instance.
-   *
-   * @param signer - The EVM signer for client operations
-   */
-  constructor(signer) {
-    this.signer = signer;
-    this.scheme = "exact";
-  }
-  /**
-   * Creates a payment payload for the Exact scheme (V1).
-   *
-   * @param x402Version - The x402 protocol version
-   * @param paymentRequirements - The payment requirements
-   * @returns Promise resolving to a payment payload
-   */
-  async createPaymentPayload(x402Version, paymentRequirements) {
-    const selectedV1 = paymentRequirements;
-    const nonce = createNonce();
-    const now = Math.floor(Date.now() / 1e3);
-    const authorization = {
-      from: this.signer.address,
-      to: getAddress(selectedV1.payTo),
-      value: selectedV1.maxAmountRequired,
-      validAfter: (now - 600).toString(),
-      // 10 minutes before
-      validBefore: (now + selectedV1.maxTimeoutSeconds).toString(),
-      nonce
-    };
-    const signature = await this.signAuthorization(authorization, selectedV1);
-    const payload = {
-      authorization,
-      signature
-    };
-    return {
-      x402Version,
-      scheme: selectedV1.scheme,
-      network: selectedV1.network,
-      payload
-    };
-  }
-  /**
-   * Sign the EIP-3009 authorization using EIP-712
-   *
-   * @param authorization - The authorization to sign
-   * @param requirements - The payment requirements
-   * @returns Promise resolving to the signature
-   */
-  async signAuthorization(authorization, requirements) {
-    const chainId = getEvmChainId(requirements.network);
-    if (!requirements.extra?.name || !requirements.extra?.version) {
-      throw new Error(
-        `EIP-712 domain parameters (name, version) are required in payment requirements for asset ${requirements.asset}`
-      );
-    }
-    const { name, version } = requirements.extra;
-    const domain = {
-      name,
-      version,
-      chainId,
-      verifyingContract: getAddress(requirements.asset)
-    };
-    const message = {
-      from: getAddress(authorization.from),
-      to: getAddress(authorization.to),
-      value: BigInt(authorization.value),
-      validAfter: BigInt(authorization.validAfter),
-      validBefore: BigInt(authorization.validBefore),
-      nonce: authorization.nonce
-    };
-    return await this.signer.signTypedData({
-      domain,
-      types: authorizationTypes,
-      primaryType: "TransferWithAuthorization",
-      message
-    });
-  }
-};
-
-export {
-  ExactEvmSchemeV1
-};
-//# sourceMappingURL=chunk-PSA4YVU2.mjs.map

dist/esm/chunk-PSA4YVU2.mjs.map

-{"version":3,"sources":["../../src/exact/v1/client/scheme.ts"],"sourcesContent":["import {\n  Network,\n  PaymentPayload,\n  PaymentRequirements,\n  SchemeNetworkClient,\n} from \"@x402/core/types\";\nimport { PaymentRequirementsV1 } from \"@x402/core/types/v1\";\nimport { getAddress } from \"viem\";\nimport { authorizationTypes } from \"../../../constants\";\nimport { ClientEvmSigner } from \"../../../signer\";\nimport { ExactEvmPayloadV1 } from \"../../../types\";\nimport { createNonce, getEvmChainId } from \"../../../utils\";\n\n/**\n * EVM client implementation for the Exact payment scheme (V1).\n */\nexport class ExactEvmSchemeV1 implements SchemeNetworkClient {\n  readonly scheme = \"exact\";\n\n  /**\n   * Creates a new ExactEvmClientV1 instance.\n   *\n   * @param signer - The EVM signer for client operations\n   */\n  constructor(private readonly signer: ClientEvmSigner) {}\n\n  /**\n   * Creates a payment payload for the Exact scheme (V1).\n   *\n   * @param x402Version - The x402 protocol version\n   * @param paymentRequirements - The payment requirements\n   * @returns Promise resolving to a payment payload\n   */\n  async createPaymentPayload(\n    x402Version: number,\n    paymentRequirements: PaymentRequirements,\n  ): Promise<\n    Pick<PaymentPayload, \"x402Version\" | \"payload\"> & { scheme: string; network: Network }\n  > {\n    const selectedV1 = paymentRequirements as unknown as PaymentRequirementsV1;\n    const nonce = createNonce();\n    const now = Math.floor(Date.now() / 1000);\n\n    const authorization: ExactEvmPayloadV1[\"authorization\"] = {\n      from: this.signer.address,\n      to: getAddress(selectedV1.payTo),\n      value: selectedV1.maxAmountRequired,\n      validAfter: (now - 600).toString(), // 10 minutes before\n      validBefore: (now + selectedV1.maxTimeoutSeconds).toString(),\n      nonce,\n    };\n\n    // Sign the authorization\n    const signature = await this.signAuthorization(authorization, selectedV1);\n\n    const payload: ExactEvmPayloadV1 = {\n      authorization,\n      signature,\n    };\n\n    return {\n      x402Version,\n      scheme: selectedV1.scheme,\n      network: selectedV1.network,\n      payload,\n    };\n  }\n\n  /**\n   * Sign the EIP-3009 authorization using EIP-712\n   *\n   * @param authorization - The authorization to sign\n   * @param requirements - The payment requirements\n   * @returns Promise resolving to the signature\n   */\n  private async signAuthorization(\n    authorization: ExactEvmPayloadV1[\"authorization\"],\n    requirements: PaymentRequirementsV1,\n  ): Promise<`0x${string}`> {\n    const chainId = getEvmChainId(requirements.network);\n\n    if (!requirements.extra?.name || !requirements.extra?.version) {\n      throw new Error(\n        `EIP-712 domain parameters (name, version) are required in payment requirements for asset ${requirements.asset}`,\n      );\n    }\n\n    const { name, version } = requirements.extra;\n\n    const domain = {\n      name,\n      version,\n      chainId,\n      verifyingContract: getAddress(requirements.asset),\n    };\n\n    const message = {\n      from: getAddress(authorization.from),\n      to: getAddress(authorization.to),\n      value: BigInt(authorization.value),\n      validAfter: BigInt(authorization.validAfter),\n      validBefore: BigInt(authorization.validBefore),\n      nonce: authorization.nonce,\n    };\n\n    return await this.signer.signTypedData({\n      domain,\n      types: authorizationTypes,\n      primaryType: \"TransferWithAuthorization\",\n      message,\n    });\n  }\n}\n"],"mappings":";;;;;;;AAOA,SAAS,kBAAkB;AASpB,IAAM,mBAAN,MAAsD;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA,EAQ3D,YAA6B,QAAyB;AAAzB;AAP7B,SAAS,SAAS;AAAA,EAOqC;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA,EASvD,MAAM,qBACJ,aACA,qBAGA;AACA,UAAM,aAAa;AACnB,UAAM,QAAQ,YAAY;AAC1B,UAAM,MAAM,KAAK,MAAM,KAAK,IAAI,IAAI,GAAI;AAExC,UAAM,gBAAoD;AAAA,MACxD,MAAM,KAAK,OAAO;AAAA,MAClB,IAAI,WAAW,WAAW,KAAK;AAAA,MAC/B,OAAO,WAAW;AAAA,MAClB,aAAa,MAAM,KAAK,SAAS;AAAA;AAAA,MACjC,cAAc,MAAM,WAAW,mBAAmB,SAAS;AAAA,MAC3D;AAAA,IACF;AAGA,UAAM,YAAY,MAAM,KAAK,kBAAkB,eAAe,UAAU;AAExE,UAAM,UAA6B;AAAA,MACjC;AAAA,MACA;AAAA,IACF;AAEA,WAAO;AAAA,MACL;AAAA,MACA,QAAQ,WAAW;AAAA,MACnB,SAAS,WAAW;AAAA,MACpB;AAAA,IACF;AAAA,EACF;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA,EASA,MAAc,kBACZ,eACA,cACwB;AACxB,UAAM,UAAU,cAAc,aAAa,OAAO;AAElD,QAAI,CAAC,aAAa,OAAO,QAAQ,CAAC,aAAa,OAAO,SAAS;AAC7D,YAAM,IAAI;AAAA,QACR,4FAA4F,aAAa,KAAK;AAAA,MAChH;AAAA,IACF;AAEA,UAAM,EAAE,MAAM,QAAQ,IAAI,aAAa;AAEvC,UAAM,SAAS;AAAA,MACb;AAAA,MACA;AAAA,MACA;AAAA,MACA,mBAAmB,WAAW,aAAa,KAAK;AAAA,IAClD;AAEA,UAAM,UAAU;AAAA,MACd,MAAM,WAAW,cAAc,IAAI;AAAA,MACnC,IAAI,WAAW,cAAc,EAAE;AAAA,MAC/B,OAAO,OAAO,cAAc,KAAK;AAAA,MACjC,YAAY,OAAO,cAAc,UAAU;AAAA,MAC3C,aAAa,OAAO,cAAc,WAAW;AAAA,MAC7C,OAAO,cAAc;AAAA,IACvB;AAEA,WAAO,MAAM,KAAK,OAAO,cAAc;AAAA,MACrC;AAAA,MACA,OAAO;AAAA,MACP,aAAa;AAAA,MACb;AAAA,IACF,CAAC;AAAA,EACH;AACF;","names":[]}

dist/esm/chunk-QLXM7BIB.mjs

-// src/v1/index.ts
-var NETWORKS = [
-  "abstract",
-  "abstract-testnet",
-  "base-sepolia",
-  "base",
-  "avalanche-fuji",
-  "avalanche",
-  "iotex",
-  "sei",
-  "sei-testnet",
-  "polygon",
-  "polygon-amoy",
-  "peaq",
-  "story",
-  "educhain",
-  "skale-base-sepolia"
-];
-
-export {
-  NETWORKS
-};
-//# sourceMappingURL=chunk-QLXM7BIB.mjs.map

dist/esm/chunk-QLXM7BIB.mjs.map

-{"version":3,"sources":["../../src/v1/index.ts"],"sourcesContent":["export { ExactEvmSchemeV1 } from \"../exact/v1\";\n\nexport const NETWORKS: string[] = [\n  \"abstract\",\n  \"abstract-testnet\",\n  \"base-sepolia\",\n  \"base\",\n  \"avalanche-fuji\",\n  \"avalanche\",\n  \"iotex\",\n  \"sei\",\n  \"sei-testnet\",\n  \"polygon\",\n  \"polygon-amoy\",\n  \"peaq\",\n  \"story\",\n  \"educhain\",\n  \"skale-base-sepolia\",\n];\n"],"mappings":";AAEO,IAAM,WAAqB;AAAA,EAChC;AAAA,EACA;AAAA,EACA;AAAA,EACA;AAAA,EACA;AAAA,EACA;AAAA,EACA;AAAA,EACA;AAAA,EACA;AAAA,EACA;AAAA,EACA;AAAA,EACA;AAAA,EACA;AAAA,EACA;AAAA,EACA;AACF;","names":[]}

dist/esm/chunk-ZYXTTU74.mjs

-// src/constants.ts
-var authorizationTypes = {
-  TransferWithAuthorization: [
-    { name: "from", type: "address" },
-    { name: "to", type: "address" },
-    { name: "value", type: "uint256" },
-    { name: "validAfter", type: "uint256" },
-    { name: "validBefore", type: "uint256" },
-    { name: "nonce", type: "bytes32" }
-  ]
-};
-var eip3009ABI = [
-  {
-    inputs: [
-      { name: "from", type: "address" },
-      { name: "to", type: "address" },
-      { name: "value", type: "uint256" },
-      { name: "validAfter", type: "uint256" },
-      { name: "validBefore", type: "uint256" },
-      { name: "nonce", type: "bytes32" },
-      { name: "v", type: "uint8" },
-      { name: "r", type: "bytes32" },
-      { name: "s", type: "bytes32" }
-    ],
-    name: "transferWithAuthorization",
-    outputs: [],
-    stateMutability: "nonpayable",
-    type: "function"
-  },
-  {
-    inputs: [
-      { name: "from", type: "address" },
-      { name: "to", type: "address" },
-      { name: "value", type: "uint256" },
-      { name: "validAfter", type: "uint256" },
-      { name: "validBefore", type: "uint256" },
-      { name: "nonce", type: "bytes32" },
-      { name: "signature", type: "bytes" }
-    ],
-    name: "transferWithAuthorization",
-    outputs: [],
-    stateMutability: "nonpayable",
-    type: "function"
-  },
-  {
-    inputs: [{ name: "account", type: "address" }],
-    name: "balanceOf",
-    outputs: [{ name: "", type: "uint256" }],
-    stateMutability: "view",
-    type: "function"
-  },
-  {
-    inputs: [],
-    name: "version",
-    outputs: [{ name: "", type: "string" }],
-    stateMutability: "view",
-    type: "function"
-  }
-];
-
-// src/utils.ts
-import { toHex } from "viem";
-function getEvmChainId(network) {
-  const networkMap = {
-    base: 8453,
-    "base-sepolia": 84532,
-    ethereum: 1,
-    sepolia: 11155111,
-    polygon: 137,
-    "polygon-amoy": 80002
-  };
-  return networkMap[network] || 1;
-}
-function createNonce() {
-  const cryptoObj = typeof globalThis.crypto !== "undefined" ? globalThis.crypto : globalThis.crypto;
-  if (!cryptoObj) {
-    throw new Error("Crypto API not available");
-  }
-  return toHex(cryptoObj.getRandomValues(new Uint8Array(32)));
-}
-
-export {
-  authorizationTypes,
-  eip3009ABI,
-  getEvmChainId,
-  createNonce
-};
-//# sourceMappingURL=chunk-ZYXTTU74.mjs.map

dist/esm/chunk-ZYXTTU74.mjs.map

-{"version":3,"sources":["../../src/constants.ts","../../src/utils.ts"],"sourcesContent":["// EIP-3009 TransferWithAuthorization types for EIP-712 signing\nexport const authorizationTypes = {\n  TransferWithAuthorization: [\n    { name: \"from\", type: \"address\" },\n    { name: \"to\", type: \"address\" },\n    { name: \"value\", type: \"uint256\" },\n    { name: \"validAfter\", type: \"uint256\" },\n    { name: \"validBefore\", type: \"uint256\" },\n    { name: \"nonce\", type: \"bytes32\" },\n  ],\n} as const;\n\n// EIP3009 ABI for transferWithAuthorization function\nexport const eip3009ABI = [\n  {\n    inputs: [\n      { name: \"from\", type: \"address\" },\n      { name: \"to\", type: \"address\" },\n      { name: \"value\", type: \"uint256\" },\n      { name: \"validAfter\", type: \"uint256\" },\n      { name: \"validBefore\", type: \"uint256\" },\n      { name: \"nonce\", type: \"bytes32\" },\n      { name: \"v\", type: \"uint8\" },\n      { name: \"r\", type: \"bytes32\" },\n      { name: \"s\", type: \"bytes32\" },\n    ],\n    name: \"transferWithAuthorization\",\n    outputs: [],\n    stateMutability: \"nonpayable\",\n    type: \"function\",\n  },\n  {\n    inputs: [\n      { name: \"from\", type: \"address\" },\n      { name: \"to\", type: \"address\" },\n      { name: \"value\", type: \"uint256\" },\n      { name: \"validAfter\", type: \"uint256\" },\n      { name: \"validBefore\", type: \"uint256\" },\n      { name: \"nonce\", type: \"bytes32\" },\n      { name: \"signature\", type: \"bytes\" },\n    ],\n    name: \"transferWithAuthorization\",\n    outputs: [],\n    stateMutability: \"nonpayable\",\n    type: \"function\",\n  },\n  {\n    inputs: [{ name: \"account\", type: \"address\" }],\n    name: \"balanceOf\",\n    outputs: [{ name: \"\", type: \"uint256\" }],\n    stateMutability: \"view\",\n    type: \"function\",\n  },\n  {\n    inputs: [],\n    name: \"version\",\n    outputs: [{ name: \"\", type: \"string\" }],\n    stateMutability: \"view\",\n    type: \"function\",\n  },\n] as const;\n","import { toHex } from \"viem\";\nimport { Network } from \"@x402/core/types\";\n\n/**\n * Extract chain ID from network string (e.g., \"base-sepolia\" -> 84532)\n * Used by v1 implementations\n *\n * @param network - The network identifier\n * @returns The numeric chain ID\n */\nexport function getEvmChainId(network: Network): number {\n  const networkMap: Record<string, number> = {\n    base: 8453,\n    \"base-sepolia\": 84532,\n    ethereum: 1,\n    sepolia: 11155111,\n    polygon: 137,\n    \"polygon-amoy\": 80002,\n  };\n  return networkMap[network] || 1;\n}\n\n/**\n * Create a random 32-byte nonce for authorization\n *\n * @returns A hex-encoded 32-byte nonce\n */\nexport function createNonce(): `0x${string}` {\n  // Use dynamic import to avoid require() in ESM context\n  const cryptoObj =\n    typeof globalThis.crypto !== \"undefined\"\n      ? globalThis.crypto\n      : (globalThis as { crypto?: Crypto }).crypto;\n\n  if (!cryptoObj) {\n    throw new Error(\"Crypto API not available\");\n  }\n\n  return toHex(cryptoObj.getRandomValues(new Uint8Array(32)));\n}\n"],"mappings":";AACO,IAAM,qBAAqB;AAAA,EAChC,2BAA2B;AAAA,IACzB,EAAE,MAAM,QAAQ,MAAM,UAAU;AAAA,IAChC,EAAE,MAAM,MAAM,MAAM,UAAU;AAAA,IAC9B,EAAE,MAAM,SAAS,MAAM,UAAU;AAAA,IACjC,EAAE,MAAM,cAAc,MAAM,UAAU;AAAA,IACtC,EAAE,MAAM,eAAe,MAAM,UAAU;AAAA,IACvC,EAAE,MAAM,SAAS,MAAM,UAAU;AAAA,EACnC;AACF;AAGO,IAAM,aAAa;AAAA,EACxB;AAAA,IACE,QAAQ;AAAA,MACN,EAAE,MAAM,QAAQ,MAAM,UAAU;AAAA,MAChC,EAAE,MAAM,MAAM,MAAM,UAAU;AAAA,MAC9B,EAAE,MAAM,SAAS,MAAM,UAAU;AAAA,MACjC,EAAE,MAAM,cAAc,MAAM,UAAU;AAAA,MACtC,EAAE,MAAM,eAAe,MAAM,UAAU;AAAA,MACvC,EAAE,MAAM,SAAS,MAAM,UAAU;AAAA,MACjC,EAAE,MAAM,KAAK,MAAM,QAAQ;AAAA,MAC3B,EAAE,MAAM,KAAK,MAAM,UAAU;AAAA,MAC7B,EAAE,MAAM,KAAK,MAAM,UAAU;AAAA,IAC/B;AAAA,IACA,MAAM;AAAA,IACN,SAAS,CAAC;AAAA,IACV,iBAAiB;AAAA,IACjB,MAAM;AAAA,EACR;AAAA,EACA;AAAA,IACE,QAAQ;AAAA,MACN,EAAE,MAAM,QAAQ,MAAM,UAAU;AAAA,MAChC,EAAE,MAAM,MAAM,MAAM,UAAU;AAAA,MAC9B,EAAE,MAAM,SAAS,MAAM,UAAU;AAAA,MACjC,EAAE,MAAM,cAAc,MAAM,UAAU;AAAA,MACtC,EAAE,MAAM,eAAe,MAAM,UAAU;AAAA,MACvC,EAAE,MAAM,SAAS,MAAM,UAAU;AAAA,MACjC,EAAE,MAAM,aAAa,MAAM,QAAQ;AAAA,IACrC;AAAA,IACA,MAAM;AAAA,IACN,SAAS,CAAC;AAAA,IACV,iBAAiB;AAAA,IACjB,MAAM;AAAA,EACR;AAAA,EACA;AAAA,IACE,QAAQ,CAAC,EAAE,MAAM,WAAW,MAAM,UAAU,CAAC;AAAA,IAC7C,MAAM;AAAA,IACN,SAAS,CAAC,EAAE,MAAM,IAAI,MAAM,UAAU,CAAC;AAAA,IACvC,iBAAiB;AAAA,IACjB,MAAM;AAAA,EACR;AAAA,EACA;AAAA,IACE,QAAQ,CAAC;AAAA,IACT,MAAM;AAAA,IACN,SAAS,CAAC,EAAE,MAAM,IAAI,MAAM,SAAS,CAAC;AAAA,IACtC,iBAAiB;AAAA,IACjB,MAAM;AAAA,EACR;AACF;;;AC5DA,SAAS,aAAa;AAUf,SAAS,cAAc,SAA0B;AACtD,QAAM,aAAqC;AAAA,IACzC,MAAM;AAAA,IACN,gBAAgB;AAAA,IAChB,UAAU;AAAA,IACV,SAAS;AAAA,IACT,SAAS;AAAA,IACT,gBAAgB;AAAA,EAClB;AACA,SAAO,WAAW,OAAO,KAAK;AAChC;AAOO,SAAS,cAA6B;AAE3C,QAAM,YACJ,OAAO,WAAW,WAAW,cACzB,WAAW,SACV,WAAmC;AAE1C,MAAI,CAAC,WAAW;AACd,UAAM,IAAI,MAAM,0BAA0B;AAAA,EAC5C;AAEA,SAAO,MAAM,UAAU,gBAAgB,IAAI,WAAW,EAAE,CAAC,CAAC;AAC5D;","names":[]}

New alerts

Long strings

Supply chain risk

Contains long string literals, which may be a sign of obfuscated or packed code.

Found 1 instance in 1 package

URL strings

Supply chain risk

Package contains fragments of external URLs or IP addresses, which the package may be accessing at runtime.

Found 1 instance in 1 package

Improved metrics

Total package byte prevSize

694542

74.59%

Lines of code

5764

56.38%

Worsened metrics

Number of package files

54

-3.57%

Number of low supply chain risk alerts

4

300%

Dependency changes

• + Added

  @x402/core@2.3.1
  (transitive)

• - Removed

  @x402/core@2.8.0
  (transitive)

• Updated

  @x402/core@~2.3.0