@furlpay/account-kit

@furlpay/account-kit

Furlpay smart-contract SDK — deploy Safe smart accounts from passkeys, configure gas sponsorship, and manage time-locked pre-authorization escrows.

The on-chain layer behind Furlpay wallets, exposed programmatically:

• Safe / ERC-4337 smart accounts deployed from Passkey (WebAuthn) signers — no seed phrases
• Paymaster — sponsor gas outright or bill it in USDC/EURC against a developer balance
• Escrow — time-locked pre-authorization holds (authorize → capture/release), the on-chain equivalent of a card auth

A built-in mock provider (mock: true, the default) exercises the full lifecycle with no chain, RPC, or funds — ideal for tests and CI.

Install

npm install @furlpay/account-kit

Quick start

import { AccountKit } from "@furlpay/account-kit";

const kit = new AccountKit({ chain: "base" }); // mock mode by default

// 1. Deploy a Safe controlled by a device passkey
const safe = await kit.deploySafe([
  { credentialId: "cred_1", publicKey: "0x04ab…" },
]);

// 2. Sponsor its gas
await kit.configurePaymaster(safe.address, { mode: "sponsor" });
// …or bill gas in USDC:
await kit.configurePaymaster(safe.address, { mode: "erc20", feeToken: "USDC" });

// 3. Pre-authorize, then capture (or release) like a card auth
const hold = await kit.escrow.create(safe.address, merchantAddress, 120);
await kit.escrow.capture(hold, 87.5);   // capture ≤ authorized amount
// await kit.escrow.release(hold);      // or release the hold

Why escrow matters for AI agents

Escrow holds are the primitive for bounded agent spending: fund a hold an agent can draw against, capped and expiring, revocable by the owner. See the agent-allowances issue and the spend-mandates RFC.

Supported chains

ethereum · polygon · base (default) · arbitrum · gnosis

Going live

Pass mock: false with rpcUrl and bundlerUrl to submit real UserOperations through your bundler.

Security

Report vulnerabilities to [e-mail] — please don't open public issues.

License

MIT