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@metamask/snaps-controllers
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@metamask/snaps-controllers - npm Package Compare versions
@@ -77,6 +77,3 @@ "use strict"; | ||
| async #getSnapAccountId(connectedAddresses, scope, request) { | ||
| const accounts = this.#messenger | ||
| .call('AccountsController:listMultichainAccounts', scope) | ||
| .filter((account) => Boolean(account.metadata.snap?.enabled) && | ||
| account.methods.includes(request.method)); | ||
| const accounts = this.#getSupportedAccountsMetadata(scope, request.method); | ||
| // If no accounts can service the request, return null. | ||
@@ -199,8 +196,14 @@ if (accounts.length === 0) { | ||
| * @param scope - The CAIP-2 scope. | ||
| * @param method - An optional method that the account should support. | ||
| * @returns A list of metadata for the supported accounts. | ||
| */ | ||
| #getSupportedAccountsMetadata(scope) { | ||
| #getSupportedAccountsMetadata(scope, method) { | ||
| const runnableSnaps = this.#messenger | ||
| .call('SnapController:getRunnableSnaps') | ||
| .map((snap) => snap.id); | ||
| return this.#messenger | ||
| .call('AccountsController:listMultichainAccounts', scope) | ||
| .filter((account) => account.metadata.snap?.enabled); | ||
| .filter((account) => account.metadata.snap?.id !== undefined && | ||
| runnableSnaps.includes(account.metadata.snap?.id) && | ||
| (method === undefined || account.methods.includes(method))); | ||
| } | ||
@@ -235,7 +238,5 @@ /** | ||
| isSupportedScope(scope) { | ||
| const hasAccountSnap = this.#messenger | ||
| .call('AccountsController:listMultichainAccounts', scope) | ||
| .some((account) => account.metadata.snap?.enabled); | ||
| // We currently assume here that if one Snap exists that service the scope, we can service the scope generally. | ||
| return hasAccountSnap || this.#getProtocolSnaps(scope).length > 0; | ||
| return (this.#getSupportedAccountsMetadata(scope).length > 0 || | ||
| this.#getProtocolSnaps(scope).length > 0); | ||
| } | ||
@@ -242,0 +243,0 @@ } |
@@ -1,1 +0,1 @@ | ||
| 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type { Messenger } from '@metamask/messenger';\nimport type { PermissionControllerGetPermissionsAction } from '@metamask/permission-controller';\nimport { rpcErrors } from '@metamask/rpc-errors';\nimport {\n getProtocolCaveatScopes,\n SnapEndowments,\n} from '@metamask/snaps-rpc-methods';\nimport type { Json, JsonRpcRequest, SnapId } from '@metamask/snaps-sdk';\nimport type { InternalAccount } from '@metamask/snaps-utils';\nimport { HandlerType } from '@metamask/snaps-utils';\nimport type {\n CaipAccountId,\n CaipChainId,\n JsonRpcParams,\n} from '@metamask/utils';\nimport {\n assert,\n hasProperty,\n isObject,\n KnownCaipNamespace,\n parseCaipAccountId,\n} from '@metamask/utils';\nimport { nanoid } from 'nanoid';\n\nimport type { MultichainRoutingServiceMethodActions } from './MultichainRoutingService-method-action-types';\nimport type {\n SnapControllerGetRunnableSnapsAction,\n SnapControllerHandleRequestAction,\n} from '../snaps';\n\ntype SnapKeyring = {\n submitRequest: (request: {\n origin: string;\n account: string;\n method: string;\n params?: Json[] | Record<string, Json>;\n scope: CaipChainId;\n }) => Promise<Json>;\n};\n\n// Expecting a bound function that calls KeyringController.withKeyring selecting the Snap keyring\nexport type WithSnapKeyringFunction = <ReturnType>(\n operation: ({ keyring }: { keyring: SnapKeyring }) => Promise<ReturnType>,\n) => Promise<ReturnType>;\n\nexport type AccountsControllerListMultichainAccountsAction = {\n type: `AccountsController:listMultichainAccounts`;\n handler: (chainId?: CaipChainId) => InternalAccount[];\n};\n\nexport type MultichainRoutingServiceActions =\n MultichainRoutingServiceMethodActions;\n\ntype AllowedActions =\n | SnapControllerGetRunnableSnapsAction\n | SnapControllerHandleRequestAction\n | PermissionControllerGetPermissionsAction\n | AccountsControllerListMultichainAccountsAction;\n\nexport type MultichainRoutingServiceEvents = never;\n\nexport type MultichainRoutingServiceMessenger = Messenger<\n typeof name,\n MultichainRoutingServiceActions | AllowedActions\n>;\n\nexport type MultichainRoutingServiceArgs = {\n messenger: MultichainRoutingServiceMessenger;\n withSnapKeyring: WithSnapKeyringFunction;\n};\n\ntype ProtocolSnap = {\n snapId: SnapId;\n methods: string[];\n};\n\nconst name = 'MultichainRoutingService';\n\nconst MESSENGER_EXPOSED_METHODS = [\n 'handleRequest',\n 'getSupportedMethods',\n 'getSupportedAccounts',\n 'isSupportedScope',\n] as const;\n\nexport class MultichainRoutingService {\n name: typeof name = name;\n\n state = null;\n\n readonly #messenger: MultichainRoutingServiceMessenger;\n\n readonly #withSnapKeyring: WithSnapKeyringFunction;\n\n constructor({ messenger, withSnapKeyring }: MultichainRoutingServiceArgs) {\n this.#messenger = messenger;\n this.#withSnapKeyring = withSnapKeyring;\n\n this.#messenger.registerMethodActionHandlers(\n this,\n MESSENGER_EXPOSED_METHODS,\n );\n }\n\n /**\n * Attempts to resolve the account address to use for a given request by inspecting the request itself.\n *\n * The request is sent to an account Snap that will attempt this resolution.\n *\n * We manually construct the request instead of using the SnapKeyring, as the keyring may not be available.\n *\n * @param snapId - The ID of the Snap to send the request to.\n * @param scope - The CAIP-2 scope for the request.\n * @param request - The JSON-RPC request.\n * @returns The resolved address if found, otherwise null.\n * @throws If the invocation of the SnapKeyring fails.\n */\n async #resolveRequestAddress(\n snapId: SnapId,\n scope: CaipChainId,\n request: JsonRpcRequest,\n ) {\n try {\n const result = await this.#messenger.call(\n 'SnapController:handleRequest',\n {\n snapId,\n origin: 'metamask',\n request: {\n method: 'keyring_resolveAccountAddress',\n params: {\n request,\n scope,\n },\n },\n handler: HandlerType.OnKeyringRequest,\n },\n );\n\n assert(result === null || isObject(result));\n\n const address = result?.address as CaipAccountId;\n return address ? parseCaipAccountId(address).address : null;\n } catch {\n throw rpcErrors.internal();\n }\n }\n\n /**\n * Get the account ID of the account that should service the RPC request via an account Snap.\n *\n * This function checks whether any accounts exist that can service a given request by\n * using a combination of the resolveAccountAddress functionality and the connected accounts.\n *\n * If an account is expected to service this request but none is found, the function will throw.\n *\n * @param connectedAddresses - The CAIP-10 addresses connected to the\n * requesting origin for the requested scope.\n * @param scope - The CAIP-2 scope for the request.\n * @param request - The JSON-RPC request.\n * @returns An account ID if found, otherwise null.\n * @throws If no account is found, but the accounts exist that could service the request.\n */\n async #getSnapAccountId(\n connectedAddresses: CaipAccountId[],\n scope: CaipChainId,\n request: JsonRpcRequest,\n ) {\n const accounts = this.#messenger\n .call('AccountsController:listMultichainAccounts', scope)\n .filter(\n (\n account: InternalAccount,\n ): account is InternalAccount & {\n metadata: Required<InternalAccount['metadata']>;\n } =>\n Boolean(account.metadata.snap?.enabled) &&\n account.methods.includes(request.method),\n );\n\n // If no accounts can service the request, return null.\n if (accounts.length === 0) {\n return null;\n }\n\n const parsedConnectedAddresses = connectedAddresses.map(\n (connectedAddress) => parseCaipAccountId(connectedAddress).address,\n );\n\n const connectedAccounts = accounts.filter((account) =>\n parsedConnectedAddresses.includes(account.address),\n );\n\n if (connectedAccounts.length === 0) {\n throw rpcErrors.invalidParams({\n message: 'No available account found for request.',\n });\n }\n\n const resolutionSnapId = connectedAccounts[0].metadata.snap.id;\n\n // Attempt to resolve the address that should be used for signing.\n const address = await this.#resolveRequestAddress(\n resolutionSnapId,\n scope,\n request,\n );\n\n // If we have a resolved address, try to find the selected account based on that\n // otherwise, default to one of the connected accounts.\n // TODO: Eventually let the user choose if we have more than one option for the account.\n const selectedAccount = address\n ? connectedAccounts.find((account) => account.address === address)\n : connectedAccounts[0];\n\n if (!selectedAccount) {\n throw rpcErrors.invalidParams({\n message: 'No available account found for request.',\n });\n }\n\n return selectedAccount.id;\n }\n\n /**\n * Get all protocol Snaps that can service a given CAIP-2 scope.\n *\n * Protocol Snaps are deemed fit to service a scope if they are runnable\n * and have the proper permissions set for the scope.\n *\n * @param scope - A CAIP-2 scope.\n * @returns A list of all the protocol Snaps available and their RPC methods.\n */\n #getProtocolSnaps(scope: CaipChainId) {\n const filteredSnaps = this.#messenger.call(\n 'SnapController:getRunnableSnaps',\n );\n\n return filteredSnaps.reduce<ProtocolSnap[]>((accumulator, snap) => {\n const permissions = this.#messenger.call(\n 'PermissionController:getPermissions',\n snap.id,\n );\n\n if (permissions && hasProperty(permissions, SnapEndowments.Protocol)) {\n const permission = permissions[SnapEndowments.Protocol];\n const scopes = getProtocolCaveatScopes(permission);\n if (scopes && hasProperty(scopes, scope)) {\n accumulator.push({\n snapId: snap.id,\n methods: scopes[scope].methods,\n });\n }\n }\n\n return accumulator;\n }, []);\n }\n\n /**\n * Handle an incoming JSON-RPC request tied to a specific scope by routing\n * to either a protocol Snap or an account Snap.\n *\n * Note: Addresses are considered case-sensitive by the MultichainRoutingService as\n * not all non-EVM chains are case-insensitive.\n *\n * @param options - An options bag.\n * @param options.connectedAddresses - Addresses currently connected to the\n * origin for the requested scope.\n * @param options.origin - The origin of the RPC request.\n * @param options.request - The JSON-RPC request.\n * @param options.scope - The CAIP-2 scope for the request.\n * @returns The response from the chosen Snap.\n * @throws If no handler was found.\n */\n async handleRequest({\n connectedAddresses,\n origin,\n scope,\n request: rawRequest,\n }: {\n connectedAddresses: CaipAccountId[];\n origin: string;\n scope: CaipChainId;\n request: JsonRpcRequest;\n }): Promise<Json> {\n // Explicitly block EVM scopes, just in case.\n assert(\n !scope.startsWith(KnownCaipNamespace.Eip155) &&\n !scope.startsWith('wallet:eip155'),\n );\n\n // Re-create the request to simplify and remove additional properties that may be present in MM middleware.\n const request = {\n jsonrpc: '2.0' as const,\n id: rawRequest.id ?? nanoid(),\n method: rawRequest.method,\n ...(rawRequest.params ? { params: rawRequest.params } : {}),\n };\n\n const { method, params } = request;\n\n // If the RPC request can be serviced by an account Snap, route it there.\n const accountId = await this.#getSnapAccountId(\n connectedAddresses,\n scope,\n request,\n );\n\n if (accountId) {\n return this.#withSnapKeyring(async ({ keyring }) =>\n keyring.submitRequest({\n origin,\n account: accountId,\n scope,\n method,\n params: params as JsonRpcParams,\n }),\n );\n }\n\n // If the RPC request cannot be serviced by an account Snap,\n // but has a protocol Snap available, route it there.\n const protocolSnaps = this.#getProtocolSnaps(scope);\n const protocolSnap = protocolSnaps.find((snap) =>\n snap.methods.includes(method),\n );\n\n if (protocolSnap) {\n return this.#messenger.call('SnapController:handleRequest', {\n snapId: protocolSnap.snapId,\n origin,\n request: {\n method: '',\n params: {\n request,\n scope,\n },\n },\n handler: HandlerType.OnProtocolRequest,\n }) as Promise<Json>;\n }\n\n // If no compatible account or protocol Snaps were found, throw.\n throw rpcErrors.methodNotFound();\n }\n\n /**\n * Get a list of metadata for supported accounts for a given scope from the client.\n *\n * @param scope - The CAIP-2 scope.\n * @returns A list of metadata for the supported accounts.\n */\n #getSupportedAccountsMetadata(scope: CaipChainId): InternalAccount[] {\n return this.#messenger\n .call('AccountsController:listMultichainAccounts', scope)\n .filter((account: InternalAccount) => account.metadata.snap?.enabled);\n }\n\n /**\n * Get a list of supported methods for a given scope.\n * This combines both protocol and account Snaps supported methods.\n *\n * @param scope - The CAIP-2 scope.\n * @returns A list of supported methods.\n */\n getSupportedMethods(scope: CaipChainId): string[] {\n const accountMethods = this.#getSupportedAccountsMetadata(scope).flatMap(\n (account) => account.methods,\n );\n\n const protocolMethods = this.#getProtocolSnaps(scope).flatMap(\n (snap) => snap.methods,\n );\n\n return Array.from(new Set([...accountMethods, ...protocolMethods]));\n }\n\n /**\n * Get a list of supported accounts for a given scope.\n *\n * @param scope - The CAIP-2 scope.\n * @returns A list of CAIP-10 addresses.\n */\n getSupportedAccounts(scope: CaipChainId): string[] {\n return this.#getSupportedAccountsMetadata(scope).map(\n (account) => `${scope}:${account.address}`,\n );\n }\n\n /**\n * Determine whether a given CAIP-2 scope is supported by the router.\n *\n * @param scope - The CAIP-2 scope.\n * @returns True if the router can service the scope, otherwise false.\n */\n isSupportedScope(scope: CaipChainId): boolean {\n const hasAccountSnap = this.#messenger\n .call('AccountsController:listMultichainAccounts', scope)\n .some((account: InternalAccount) => account.metadata.snap?.enabled);\n // We currently assume here that if one Snap exists that service the scope, we can service the scope generally.\n return hasAccountSnap || this.#getProtocolSnaps(scope).length > 0;\n }\n}\n"]} | ||
| 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type { Messenger } from '@metamask/messenger';\nimport type { PermissionControllerGetPermissionsAction } from '@metamask/permission-controller';\nimport { rpcErrors } from '@metamask/rpc-errors';\nimport {\n getProtocolCaveatScopes,\n SnapEndowments,\n} from '@metamask/snaps-rpc-methods';\nimport type { Json, JsonRpcRequest, SnapId } from '@metamask/snaps-sdk';\nimport type { InternalAccount } from '@metamask/snaps-utils';\nimport { HandlerType } from '@metamask/snaps-utils';\nimport type {\n CaipAccountId,\n CaipChainId,\n JsonRpcParams,\n} from '@metamask/utils';\nimport {\n assert,\n hasProperty,\n isObject,\n KnownCaipNamespace,\n parseCaipAccountId,\n} from '@metamask/utils';\nimport { nanoid } from 'nanoid';\n\nimport type { MultichainRoutingServiceMethodActions } from './MultichainRoutingService-method-action-types';\nimport type {\n SnapControllerGetRunnableSnapsAction,\n SnapControllerHandleRequestAction,\n} from '../snaps';\n\ntype SnapKeyring = {\n submitRequest: (request: {\n origin: string;\n account: string;\n method: string;\n params?: Json[] | Record<string, Json>;\n scope: CaipChainId;\n }) => Promise<Json>;\n};\n\n// Expecting a bound function that calls KeyringController.withKeyring selecting the Snap keyring\nexport type WithSnapKeyringFunction = <ReturnType>(\n operation: ({ keyring }: { keyring: SnapKeyring }) => Promise<ReturnType>,\n) => Promise<ReturnType>;\n\nexport type AccountsControllerListMultichainAccountsAction = {\n type: `AccountsController:listMultichainAccounts`;\n handler: (chainId?: CaipChainId) => InternalAccount[];\n};\n\nexport type MultichainRoutingServiceActions =\n MultichainRoutingServiceMethodActions;\n\ntype AllowedActions =\n | SnapControllerGetRunnableSnapsAction\n | SnapControllerHandleRequestAction\n | PermissionControllerGetPermissionsAction\n | AccountsControllerListMultichainAccountsAction;\n\nexport type MultichainRoutingServiceEvents = never;\n\nexport type MultichainRoutingServiceMessenger = Messenger<\n typeof name,\n MultichainRoutingServiceActions | AllowedActions\n>;\n\nexport type MultichainRoutingServiceArgs = {\n messenger: MultichainRoutingServiceMessenger;\n withSnapKeyring: WithSnapKeyringFunction;\n};\n\ntype ProtocolSnap = {\n snapId: SnapId;\n methods: string[];\n};\n\nconst name = 'MultichainRoutingService';\n\nconst MESSENGER_EXPOSED_METHODS = [\n 'handleRequest',\n 'getSupportedMethods',\n 'getSupportedAccounts',\n 'isSupportedScope',\n] as const;\n\nexport class MultichainRoutingService {\n name: typeof name = name;\n\n state = null;\n\n readonly #messenger: MultichainRoutingServiceMessenger;\n\n readonly #withSnapKeyring: WithSnapKeyringFunction;\n\n constructor({ messenger, withSnapKeyring }: MultichainRoutingServiceArgs) {\n this.#messenger = messenger;\n this.#withSnapKeyring = withSnapKeyring;\n\n this.#messenger.registerMethodActionHandlers(\n this,\n MESSENGER_EXPOSED_METHODS,\n );\n }\n\n /**\n * Attempts to resolve the account address to use for a given request by inspecting the request itself.\n *\n * The request is sent to an account Snap that will attempt this resolution.\n *\n * We manually construct the request instead of using the SnapKeyring, as the keyring may not be available.\n *\n * @param snapId - The ID of the Snap to send the request to.\n * @param scope - The CAIP-2 scope for the request.\n * @param request - The JSON-RPC request.\n * @returns The resolved address if found, otherwise null.\n * @throws If the invocation of the SnapKeyring fails.\n */\n async #resolveRequestAddress(\n snapId: SnapId,\n scope: CaipChainId,\n request: JsonRpcRequest,\n ) {\n try {\n const result = await this.#messenger.call(\n 'SnapController:handleRequest',\n {\n snapId,\n origin: 'metamask',\n request: {\n method: 'keyring_resolveAccountAddress',\n params: {\n request,\n scope,\n },\n },\n handler: HandlerType.OnKeyringRequest,\n },\n );\n\n assert(result === null || isObject(result));\n\n const address = result?.address as CaipAccountId;\n return address ? parseCaipAccountId(address).address : null;\n } catch {\n throw rpcErrors.internal();\n }\n }\n\n /**\n * Get the account ID of the account that should service the RPC request via an account Snap.\n *\n * This function checks whether any accounts exist that can service a given request by\n * using a combination of the resolveAccountAddress functionality and the connected accounts.\n *\n * If an account is expected to service this request but none is found, the function will throw.\n *\n * @param connectedAddresses - The CAIP-10 addresses connected to the\n * requesting origin for the requested scope.\n * @param scope - The CAIP-2 scope for the request.\n * @param request - The JSON-RPC request.\n * @returns An account ID if found, otherwise null.\n * @throws If no account is found, but the accounts exist that could service the request.\n */\n async #getSnapAccountId(\n connectedAddresses: CaipAccountId[],\n scope: CaipChainId,\n request: JsonRpcRequest,\n ) {\n const accounts = this.#getSupportedAccountsMetadata(scope, request.method);\n\n // If no accounts can service the request, return null.\n if (accounts.length === 0) {\n return null;\n }\n\n const parsedConnectedAddresses = connectedAddresses.map(\n (connectedAddress) => parseCaipAccountId(connectedAddress).address,\n );\n\n const connectedAccounts = accounts.filter((account) =>\n parsedConnectedAddresses.includes(account.address),\n );\n\n if (connectedAccounts.length === 0) {\n throw rpcErrors.invalidParams({\n message: 'No available account found for request.',\n });\n }\n\n const resolutionSnapId = connectedAccounts[0].metadata.snap.id;\n\n // Attempt to resolve the address that should be used for signing.\n const address = await this.#resolveRequestAddress(\n resolutionSnapId,\n scope,\n request,\n );\n\n // If we have a resolved address, try to find the selected account based on that\n // otherwise, default to one of the connected accounts.\n // TODO: Eventually let the user choose if we have more than one option for the account.\n const selectedAccount = address\n ? connectedAccounts.find((account) => account.address === address)\n : connectedAccounts[0];\n\n if (!selectedAccount) {\n throw rpcErrors.invalidParams({\n message: 'No available account found for request.',\n });\n }\n\n return selectedAccount.id;\n }\n\n /**\n * Get all protocol Snaps that can service a given CAIP-2 scope.\n *\n * Protocol Snaps are deemed fit to service a scope if they are runnable\n * and have the proper permissions set for the scope.\n *\n * @param scope - A CAIP-2 scope.\n * @returns A list of all the protocol Snaps available and their RPC methods.\n */\n #getProtocolSnaps(scope: CaipChainId) {\n const filteredSnaps = this.#messenger.call(\n 'SnapController:getRunnableSnaps',\n );\n\n return filteredSnaps.reduce<ProtocolSnap[]>((accumulator, snap) => {\n const permissions = this.#messenger.call(\n 'PermissionController:getPermissions',\n snap.id,\n );\n\n if (permissions && hasProperty(permissions, SnapEndowments.Protocol)) {\n const permission = permissions[SnapEndowments.Protocol];\n const scopes = getProtocolCaveatScopes(permission);\n if (scopes && hasProperty(scopes, scope)) {\n accumulator.push({\n snapId: snap.id,\n methods: scopes[scope].methods,\n });\n }\n }\n\n return accumulator;\n }, []);\n }\n\n /**\n * Handle an incoming JSON-RPC request tied to a specific scope by routing\n * to either a protocol Snap or an account Snap.\n *\n * Note: Addresses are considered case-sensitive by the MultichainRoutingService as\n * not all non-EVM chains are case-insensitive.\n *\n * @param options - An options bag.\n * @param options.connectedAddresses - Addresses currently connected to the\n * origin for the requested scope.\n * @param options.origin - The origin of the RPC request.\n * @param options.request - The JSON-RPC request.\n * @param options.scope - The CAIP-2 scope for the request.\n * @returns The response from the chosen Snap.\n * @throws If no handler was found.\n */\n async handleRequest({\n connectedAddresses,\n origin,\n scope,\n request: rawRequest,\n }: {\n connectedAddresses: CaipAccountId[];\n origin: string;\n scope: CaipChainId;\n request: JsonRpcRequest;\n }): Promise<Json> {\n // Explicitly block EVM scopes, just in case.\n assert(\n !scope.startsWith(KnownCaipNamespace.Eip155) &&\n !scope.startsWith('wallet:eip155'),\n );\n\n // Re-create the request to simplify and remove additional properties that may be present in MM middleware.\n const request = {\n jsonrpc: '2.0' as const,\n id: rawRequest.id ?? nanoid(),\n method: rawRequest.method,\n ...(rawRequest.params ? { params: rawRequest.params } : {}),\n };\n\n const { method, params } = request;\n\n // If the RPC request can be serviced by an account Snap, route it there.\n const accountId = await this.#getSnapAccountId(\n connectedAddresses,\n scope,\n request,\n );\n\n if (accountId) {\n return this.#withSnapKeyring(async ({ keyring }) =>\n keyring.submitRequest({\n origin,\n account: accountId,\n scope,\n method,\n params: params as JsonRpcParams,\n }),\n );\n }\n\n // If the RPC request cannot be serviced by an account Snap,\n // but has a protocol Snap available, route it there.\n const protocolSnaps = this.#getProtocolSnaps(scope);\n const protocolSnap = protocolSnaps.find((snap) =>\n snap.methods.includes(method),\n );\n\n if (protocolSnap) {\n return this.#messenger.call('SnapController:handleRequest', {\n snapId: protocolSnap.snapId,\n origin,\n request: {\n method: '',\n params: {\n request,\n scope,\n },\n },\n handler: HandlerType.OnProtocolRequest,\n }) as Promise<Json>;\n }\n\n // If no compatible account or protocol Snaps were found, throw.\n throw rpcErrors.methodNotFound();\n }\n\n /**\n * Get a list of metadata for supported accounts for a given scope from the client.\n *\n * @param scope - The CAIP-2 scope.\n * @param method - An optional method that the account should support.\n * @returns A list of metadata for the supported accounts.\n */\n #getSupportedAccountsMetadata(\n scope: CaipChainId,\n method?: string,\n ): (InternalAccount & {\n metadata: Required<InternalAccount['metadata']>;\n })[] {\n const runnableSnaps = this.#messenger\n .call('SnapController:getRunnableSnaps')\n .map((snap) => snap.id);\n\n return this.#messenger\n .call('AccountsController:listMultichainAccounts', scope)\n .filter(\n (\n account: InternalAccount,\n ): account is InternalAccount & {\n metadata: Required<InternalAccount['metadata']>;\n } =>\n account.metadata.snap?.id !== undefined &&\n runnableSnaps.includes(account.metadata.snap?.id) &&\n (method === undefined || account.methods.includes(method)),\n );\n }\n\n /**\n * Get a list of supported methods for a given scope.\n * This combines both protocol and account Snaps supported methods.\n *\n * @param scope - The CAIP-2 scope.\n * @returns A list of supported methods.\n */\n getSupportedMethods(scope: CaipChainId): string[] {\n const accountMethods = this.#getSupportedAccountsMetadata(scope).flatMap(\n (account) => account.methods,\n );\n\n const protocolMethods = this.#getProtocolSnaps(scope).flatMap(\n (snap) => snap.methods,\n );\n\n return Array.from(new Set([...accountMethods, ...protocolMethods]));\n }\n\n /**\n * Get a list of supported accounts for a given scope.\n *\n * @param scope - The CAIP-2 scope.\n * @returns A list of CAIP-10 addresses.\n */\n getSupportedAccounts(scope: CaipChainId): string[] {\n return this.#getSupportedAccountsMetadata(scope).map(\n (account) => `${scope}:${account.address}`,\n );\n }\n\n /**\n * Determine whether a given CAIP-2 scope is supported by the router.\n *\n * @param scope - The CAIP-2 scope.\n * @returns True if the router can service the scope, otherwise false.\n */\n isSupportedScope(scope: CaipChainId): boolean {\n // We currently assume here that if one Snap exists that service the scope, we can service the scope generally.\n return (\n this.#getSupportedAccountsMetadata(scope).length > 0 ||\n this.#getProtocolSnaps(scope).length > 0\n );\n }\n}\n"]} |
@@ -1,1 +0,1 @@ | ||
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@@ -1,1 +0,1 @@ | ||
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@@ -74,6 +74,3 @@ import { rpcErrors } from "@metamask/rpc-errors"; | ||
| async #getSnapAccountId(connectedAddresses, scope, request) { | ||
| const accounts = this.#messenger | ||
| .call('AccountsController:listMultichainAccounts', scope) | ||
| .filter((account) => Boolean(account.metadata.snap?.enabled) && | ||
| account.methods.includes(request.method)); | ||
| const accounts = this.#getSupportedAccountsMetadata(scope, request.method); | ||
| // If no accounts can service the request, return null. | ||
@@ -196,8 +193,14 @@ if (accounts.length === 0) { | ||
| * @param scope - The CAIP-2 scope. | ||
| * @param method - An optional method that the account should support. | ||
| * @returns A list of metadata for the supported accounts. | ||
| */ | ||
| #getSupportedAccountsMetadata(scope) { | ||
| #getSupportedAccountsMetadata(scope, method) { | ||
| const runnableSnaps = this.#messenger | ||
| .call('SnapController:getRunnableSnaps') | ||
| .map((snap) => snap.id); | ||
| return this.#messenger | ||
| .call('AccountsController:listMultichainAccounts', scope) | ||
| .filter((account) => account.metadata.snap?.enabled); | ||
| .filter((account) => account.metadata.snap?.id !== undefined && | ||
| runnableSnaps.includes(account.metadata.snap?.id) && | ||
| (method === undefined || account.methods.includes(method))); | ||
| } | ||
@@ -232,9 +235,7 @@ /** | ||
| isSupportedScope(scope) { | ||
| const hasAccountSnap = this.#messenger | ||
| .call('AccountsController:listMultichainAccounts', scope) | ||
| .some((account) => account.metadata.snap?.enabled); | ||
| // We currently assume here that if one Snap exists that service the scope, we can service the scope generally. | ||
| return hasAccountSnap || this.#getProtocolSnaps(scope).length > 0; | ||
| return (this.#getSupportedAccountsMetadata(scope).length > 0 || | ||
| this.#getProtocolSnaps(scope).length > 0); | ||
| } | ||
| } | ||
| //# sourceMappingURL=MultichainRoutingService.mjs.map |
@@ -1,1 +0,1 @@ | ||
| 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type { Messenger } from '@metamask/messenger';\nimport type { PermissionControllerGetPermissionsAction } from '@metamask/permission-controller';\nimport { rpcErrors } from '@metamask/rpc-errors';\nimport {\n getProtocolCaveatScopes,\n SnapEndowments,\n} from '@metamask/snaps-rpc-methods';\nimport type { Json, JsonRpcRequest, SnapId } from '@metamask/snaps-sdk';\nimport type { InternalAccount } from '@metamask/snaps-utils';\nimport { HandlerType } from '@metamask/snaps-utils';\nimport type {\n CaipAccountId,\n CaipChainId,\n JsonRpcParams,\n} from '@metamask/utils';\nimport {\n assert,\n hasProperty,\n isObject,\n KnownCaipNamespace,\n parseCaipAccountId,\n} from '@metamask/utils';\nimport { nanoid } from 'nanoid';\n\nimport type { MultichainRoutingServiceMethodActions } from './MultichainRoutingService-method-action-types';\nimport type {\n SnapControllerGetRunnableSnapsAction,\n SnapControllerHandleRequestAction,\n} from '../snaps';\n\ntype SnapKeyring = {\n submitRequest: (request: {\n origin: string;\n account: string;\n method: string;\n params?: Json[] | Record<string, Json>;\n scope: CaipChainId;\n }) => Promise<Json>;\n};\n\n// Expecting a bound function that calls KeyringController.withKeyring selecting the Snap keyring\nexport type WithSnapKeyringFunction = <ReturnType>(\n operation: ({ keyring }: { keyring: SnapKeyring }) => Promise<ReturnType>,\n) => Promise<ReturnType>;\n\nexport type AccountsControllerListMultichainAccountsAction = {\n type: `AccountsController:listMultichainAccounts`;\n handler: (chainId?: CaipChainId) => InternalAccount[];\n};\n\nexport type MultichainRoutingServiceActions =\n MultichainRoutingServiceMethodActions;\n\ntype AllowedActions =\n | SnapControllerGetRunnableSnapsAction\n | SnapControllerHandleRequestAction\n | PermissionControllerGetPermissionsAction\n | AccountsControllerListMultichainAccountsAction;\n\nexport type MultichainRoutingServiceEvents = never;\n\nexport type MultichainRoutingServiceMessenger = Messenger<\n typeof name,\n MultichainRoutingServiceActions | AllowedActions\n>;\n\nexport type MultichainRoutingServiceArgs = {\n messenger: MultichainRoutingServiceMessenger;\n withSnapKeyring: WithSnapKeyringFunction;\n};\n\ntype ProtocolSnap = {\n snapId: SnapId;\n methods: string[];\n};\n\nconst name = 'MultichainRoutingService';\n\nconst MESSENGER_EXPOSED_METHODS = [\n 'handleRequest',\n 'getSupportedMethods',\n 'getSupportedAccounts',\n 'isSupportedScope',\n] as const;\n\nexport class MultichainRoutingService {\n name: typeof name = name;\n\n state = null;\n\n readonly #messenger: MultichainRoutingServiceMessenger;\n\n readonly #withSnapKeyring: WithSnapKeyringFunction;\n\n constructor({ messenger, withSnapKeyring }: MultichainRoutingServiceArgs) {\n this.#messenger = messenger;\n this.#withSnapKeyring = withSnapKeyring;\n\n this.#messenger.registerMethodActionHandlers(\n this,\n MESSENGER_EXPOSED_METHODS,\n );\n }\n\n /**\n * Attempts to resolve the account address to use for a given request by inspecting the request itself.\n *\n * The request is sent to an account Snap that will attempt this resolution.\n *\n * We manually construct the request instead of using the SnapKeyring, as the keyring may not be available.\n *\n * @param snapId - The ID of the Snap to send the request to.\n * @param scope - The CAIP-2 scope for the request.\n * @param request - The JSON-RPC request.\n * @returns The resolved address if found, otherwise null.\n * @throws If the invocation of the SnapKeyring fails.\n */\n async #resolveRequestAddress(\n snapId: SnapId,\n scope: CaipChainId,\n request: JsonRpcRequest,\n ) {\n try {\n const result = await this.#messenger.call(\n 'SnapController:handleRequest',\n {\n snapId,\n origin: 'metamask',\n request: {\n method: 'keyring_resolveAccountAddress',\n params: {\n request,\n scope,\n },\n },\n handler: HandlerType.OnKeyringRequest,\n },\n );\n\n assert(result === null || isObject(result));\n\n const address = result?.address as CaipAccountId;\n return address ? parseCaipAccountId(address).address : null;\n } catch {\n throw rpcErrors.internal();\n }\n }\n\n /**\n * Get the account ID of the account that should service the RPC request via an account Snap.\n *\n * This function checks whether any accounts exist that can service a given request by\n * using a combination of the resolveAccountAddress functionality and the connected accounts.\n *\n * If an account is expected to service this request but none is found, the function will throw.\n *\n * @param connectedAddresses - The CAIP-10 addresses connected to the\n * requesting origin for the requested scope.\n * @param scope - The CAIP-2 scope for the request.\n * @param request - The JSON-RPC request.\n * @returns An account ID if found, otherwise null.\n * @throws If no account is found, but the accounts exist that could service the request.\n */\n async #getSnapAccountId(\n connectedAddresses: CaipAccountId[],\n scope: CaipChainId,\n request: JsonRpcRequest,\n ) {\n const accounts = this.#messenger\n .call('AccountsController:listMultichainAccounts', scope)\n .filter(\n (\n account: InternalAccount,\n ): account is InternalAccount & {\n metadata: Required<InternalAccount['metadata']>;\n } =>\n Boolean(account.metadata.snap?.enabled) &&\n account.methods.includes(request.method),\n );\n\n // If no accounts can service the request, return null.\n if (accounts.length === 0) {\n return null;\n }\n\n const parsedConnectedAddresses = connectedAddresses.map(\n (connectedAddress) => parseCaipAccountId(connectedAddress).address,\n );\n\n const connectedAccounts = accounts.filter((account) =>\n parsedConnectedAddresses.includes(account.address),\n );\n\n if (connectedAccounts.length === 0) {\n throw rpcErrors.invalidParams({\n message: 'No available account found for request.',\n });\n }\n\n const resolutionSnapId = connectedAccounts[0].metadata.snap.id;\n\n // Attempt to resolve the address that should be used for signing.\n const address = await this.#resolveRequestAddress(\n resolutionSnapId,\n scope,\n request,\n );\n\n // If we have a resolved address, try to find the selected account based on that\n // otherwise, default to one of the connected accounts.\n // TODO: Eventually let the user choose if we have more than one option for the account.\n const selectedAccount = address\n ? connectedAccounts.find((account) => account.address === address)\n : connectedAccounts[0];\n\n if (!selectedAccount) {\n throw rpcErrors.invalidParams({\n message: 'No available account found for request.',\n });\n }\n\n return selectedAccount.id;\n }\n\n /**\n * Get all protocol Snaps that can service a given CAIP-2 scope.\n *\n * Protocol Snaps are deemed fit to service a scope if they are runnable\n * and have the proper permissions set for the scope.\n *\n * @param scope - A CAIP-2 scope.\n * @returns A list of all the protocol Snaps available and their RPC methods.\n */\n #getProtocolSnaps(scope: CaipChainId) {\n const filteredSnaps = this.#messenger.call(\n 'SnapController:getRunnableSnaps',\n );\n\n return filteredSnaps.reduce<ProtocolSnap[]>((accumulator, snap) => {\n const permissions = this.#messenger.call(\n 'PermissionController:getPermissions',\n snap.id,\n );\n\n if (permissions && hasProperty(permissions, SnapEndowments.Protocol)) {\n const permission = permissions[SnapEndowments.Protocol];\n const scopes = getProtocolCaveatScopes(permission);\n if (scopes && hasProperty(scopes, scope)) {\n accumulator.push({\n snapId: snap.id,\n methods: scopes[scope].methods,\n });\n }\n }\n\n return accumulator;\n }, []);\n }\n\n /**\n * Handle an incoming JSON-RPC request tied to a specific scope by routing\n * to either a protocol Snap or an account Snap.\n *\n * Note: Addresses are considered case-sensitive by the MultichainRoutingService as\n * not all non-EVM chains are case-insensitive.\n *\n * @param options - An options bag.\n * @param options.connectedAddresses - Addresses currently connected to the\n * origin for the requested scope.\n * @param options.origin - The origin of the RPC request.\n * @param options.request - The JSON-RPC request.\n * @param options.scope - The CAIP-2 scope for the request.\n * @returns The response from the chosen Snap.\n * @throws If no handler was found.\n */\n async handleRequest({\n connectedAddresses,\n origin,\n scope,\n request: rawRequest,\n }: {\n connectedAddresses: CaipAccountId[];\n origin: string;\n scope: CaipChainId;\n request: JsonRpcRequest;\n }): Promise<Json> {\n // Explicitly block EVM scopes, just in case.\n assert(\n !scope.startsWith(KnownCaipNamespace.Eip155) &&\n !scope.startsWith('wallet:eip155'),\n );\n\n // Re-create the request to simplify and remove additional properties that may be present in MM middleware.\n const request = {\n jsonrpc: '2.0' as const,\n id: rawRequest.id ?? nanoid(),\n method: rawRequest.method,\n ...(rawRequest.params ? { params: rawRequest.params } : {}),\n };\n\n const { method, params } = request;\n\n // If the RPC request can be serviced by an account Snap, route it there.\n const accountId = await this.#getSnapAccountId(\n connectedAddresses,\n scope,\n request,\n );\n\n if (accountId) {\n return this.#withSnapKeyring(async ({ keyring }) =>\n keyring.submitRequest({\n origin,\n account: accountId,\n scope,\n method,\n params: params as JsonRpcParams,\n }),\n );\n }\n\n // If the RPC request cannot be serviced by an account Snap,\n // but has a protocol Snap available, route it there.\n const protocolSnaps = this.#getProtocolSnaps(scope);\n const protocolSnap = protocolSnaps.find((snap) =>\n snap.methods.includes(method),\n );\n\n if (protocolSnap) {\n return this.#messenger.call('SnapController:handleRequest', {\n snapId: protocolSnap.snapId,\n origin,\n request: {\n method: '',\n params: {\n request,\n scope,\n },\n },\n handler: HandlerType.OnProtocolRequest,\n }) as Promise<Json>;\n }\n\n // If no compatible account or protocol Snaps were found, throw.\n throw rpcErrors.methodNotFound();\n }\n\n /**\n * Get a list of metadata for supported accounts for a given scope from the client.\n *\n * @param scope - The CAIP-2 scope.\n * @returns A list of metadata for the supported accounts.\n */\n #getSupportedAccountsMetadata(scope: CaipChainId): InternalAccount[] {\n return this.#messenger\n .call('AccountsController:listMultichainAccounts', scope)\n .filter((account: InternalAccount) => account.metadata.snap?.enabled);\n }\n\n /**\n * Get a list of supported methods for a given scope.\n * This combines both protocol and account Snaps supported methods.\n *\n * @param scope - The CAIP-2 scope.\n * @returns A list of supported methods.\n */\n getSupportedMethods(scope: CaipChainId): string[] {\n const accountMethods = this.#getSupportedAccountsMetadata(scope).flatMap(\n (account) => account.methods,\n );\n\n const protocolMethods = this.#getProtocolSnaps(scope).flatMap(\n (snap) => snap.methods,\n );\n\n return Array.from(new Set([...accountMethods, ...protocolMethods]));\n }\n\n /**\n * Get a list of supported accounts for a given scope.\n *\n * @param scope - The CAIP-2 scope.\n * @returns A list of CAIP-10 addresses.\n */\n getSupportedAccounts(scope: CaipChainId): string[] {\n return this.#getSupportedAccountsMetadata(scope).map(\n (account) => `${scope}:${account.address}`,\n );\n }\n\n /**\n * Determine whether a given CAIP-2 scope is supported by the router.\n *\n * @param scope - The CAIP-2 scope.\n * @returns True if the router can service the scope, otherwise false.\n */\n isSupportedScope(scope: CaipChainId): boolean {\n const hasAccountSnap = this.#messenger\n .call('AccountsController:listMultichainAccounts', scope)\n .some((account: InternalAccount) => account.metadata.snap?.enabled);\n // We currently assume here that if one Snap exists that service the scope, we can service the scope generally.\n return hasAccountSnap || this.#getProtocolSnaps(scope).length > 0;\n }\n}\n"]} | ||
| 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type { Messenger } from '@metamask/messenger';\nimport type { PermissionControllerGetPermissionsAction } from '@metamask/permission-controller';\nimport { rpcErrors } from '@metamask/rpc-errors';\nimport {\n getProtocolCaveatScopes,\n SnapEndowments,\n} from '@metamask/snaps-rpc-methods';\nimport type { Json, JsonRpcRequest, SnapId } from '@metamask/snaps-sdk';\nimport type { InternalAccount } from '@metamask/snaps-utils';\nimport { HandlerType } from '@metamask/snaps-utils';\nimport type {\n CaipAccountId,\n CaipChainId,\n JsonRpcParams,\n} from '@metamask/utils';\nimport {\n assert,\n hasProperty,\n isObject,\n KnownCaipNamespace,\n parseCaipAccountId,\n} from '@metamask/utils';\nimport { nanoid } from 'nanoid';\n\nimport type { MultichainRoutingServiceMethodActions } from './MultichainRoutingService-method-action-types';\nimport type {\n SnapControllerGetRunnableSnapsAction,\n SnapControllerHandleRequestAction,\n} from '../snaps';\n\ntype SnapKeyring = {\n submitRequest: (request: {\n origin: string;\n account: string;\n method: string;\n params?: Json[] | Record<string, Json>;\n scope: CaipChainId;\n }) => Promise<Json>;\n};\n\n// Expecting a bound function that calls KeyringController.withKeyring selecting the Snap keyring\nexport type WithSnapKeyringFunction = <ReturnType>(\n operation: ({ keyring }: { keyring: SnapKeyring }) => Promise<ReturnType>,\n) => Promise<ReturnType>;\n\nexport type AccountsControllerListMultichainAccountsAction = {\n type: `AccountsController:listMultichainAccounts`;\n handler: (chainId?: CaipChainId) => InternalAccount[];\n};\n\nexport type MultichainRoutingServiceActions =\n MultichainRoutingServiceMethodActions;\n\ntype AllowedActions =\n | SnapControllerGetRunnableSnapsAction\n | SnapControllerHandleRequestAction\n | PermissionControllerGetPermissionsAction\n | AccountsControllerListMultichainAccountsAction;\n\nexport type MultichainRoutingServiceEvents = never;\n\nexport type MultichainRoutingServiceMessenger = Messenger<\n typeof name,\n MultichainRoutingServiceActions | AllowedActions\n>;\n\nexport type MultichainRoutingServiceArgs = {\n messenger: MultichainRoutingServiceMessenger;\n withSnapKeyring: WithSnapKeyringFunction;\n};\n\ntype ProtocolSnap = {\n snapId: SnapId;\n methods: string[];\n};\n\nconst name = 'MultichainRoutingService';\n\nconst MESSENGER_EXPOSED_METHODS = [\n 'handleRequest',\n 'getSupportedMethods',\n 'getSupportedAccounts',\n 'isSupportedScope',\n] as const;\n\nexport class MultichainRoutingService {\n name: typeof name = name;\n\n state = null;\n\n readonly #messenger: MultichainRoutingServiceMessenger;\n\n readonly #withSnapKeyring: WithSnapKeyringFunction;\n\n constructor({ messenger, withSnapKeyring }: MultichainRoutingServiceArgs) {\n this.#messenger = messenger;\n this.#withSnapKeyring = withSnapKeyring;\n\n this.#messenger.registerMethodActionHandlers(\n this,\n MESSENGER_EXPOSED_METHODS,\n );\n }\n\n /**\n * Attempts to resolve the account address to use for a given request by inspecting the request itself.\n *\n * The request is sent to an account Snap that will attempt this resolution.\n *\n * We manually construct the request instead of using the SnapKeyring, as the keyring may not be available.\n *\n * @param snapId - The ID of the Snap to send the request to.\n * @param scope - The CAIP-2 scope for the request.\n * @param request - The JSON-RPC request.\n * @returns The resolved address if found, otherwise null.\n * @throws If the invocation of the SnapKeyring fails.\n */\n async #resolveRequestAddress(\n snapId: SnapId,\n scope: CaipChainId,\n request: JsonRpcRequest,\n ) {\n try {\n const result = await this.#messenger.call(\n 'SnapController:handleRequest',\n {\n snapId,\n origin: 'metamask',\n request: {\n method: 'keyring_resolveAccountAddress',\n params: {\n request,\n scope,\n },\n },\n handler: HandlerType.OnKeyringRequest,\n },\n );\n\n assert(result === null || isObject(result));\n\n const address = result?.address as CaipAccountId;\n return address ? parseCaipAccountId(address).address : null;\n } catch {\n throw rpcErrors.internal();\n }\n }\n\n /**\n * Get the account ID of the account that should service the RPC request via an account Snap.\n *\n * This function checks whether any accounts exist that can service a given request by\n * using a combination of the resolveAccountAddress functionality and the connected accounts.\n *\n * If an account is expected to service this request but none is found, the function will throw.\n *\n * @param connectedAddresses - The CAIP-10 addresses connected to the\n * requesting origin for the requested scope.\n * @param scope - The CAIP-2 scope for the request.\n * @param request - The JSON-RPC request.\n * @returns An account ID if found, otherwise null.\n * @throws If no account is found, but the accounts exist that could service the request.\n */\n async #getSnapAccountId(\n connectedAddresses: CaipAccountId[],\n scope: CaipChainId,\n request: JsonRpcRequest,\n ) {\n const accounts = this.#getSupportedAccountsMetadata(scope, request.method);\n\n // If no accounts can service the request, return null.\n if (accounts.length === 0) {\n return null;\n }\n\n const parsedConnectedAddresses = connectedAddresses.map(\n (connectedAddress) => parseCaipAccountId(connectedAddress).address,\n );\n\n const connectedAccounts = accounts.filter((account) =>\n parsedConnectedAddresses.includes(account.address),\n );\n\n if (connectedAccounts.length === 0) {\n throw rpcErrors.invalidParams({\n message: 'No available account found for request.',\n });\n }\n\n const resolutionSnapId = connectedAccounts[0].metadata.snap.id;\n\n // Attempt to resolve the address that should be used for signing.\n const address = await this.#resolveRequestAddress(\n resolutionSnapId,\n scope,\n request,\n );\n\n // If we have a resolved address, try to find the selected account based on that\n // otherwise, default to one of the connected accounts.\n // TODO: Eventually let the user choose if we have more than one option for the account.\n const selectedAccount = address\n ? connectedAccounts.find((account) => account.address === address)\n : connectedAccounts[0];\n\n if (!selectedAccount) {\n throw rpcErrors.invalidParams({\n message: 'No available account found for request.',\n });\n }\n\n return selectedAccount.id;\n }\n\n /**\n * Get all protocol Snaps that can service a given CAIP-2 scope.\n *\n * Protocol Snaps are deemed fit to service a scope if they are runnable\n * and have the proper permissions set for the scope.\n *\n * @param scope - A CAIP-2 scope.\n * @returns A list of all the protocol Snaps available and their RPC methods.\n */\n #getProtocolSnaps(scope: CaipChainId) {\n const filteredSnaps = this.#messenger.call(\n 'SnapController:getRunnableSnaps',\n );\n\n return filteredSnaps.reduce<ProtocolSnap[]>((accumulator, snap) => {\n const permissions = this.#messenger.call(\n 'PermissionController:getPermissions',\n snap.id,\n );\n\n if (permissions && hasProperty(permissions, SnapEndowments.Protocol)) {\n const permission = permissions[SnapEndowments.Protocol];\n const scopes = getProtocolCaveatScopes(permission);\n if (scopes && hasProperty(scopes, scope)) {\n accumulator.push({\n snapId: snap.id,\n methods: scopes[scope].methods,\n });\n }\n }\n\n return accumulator;\n }, []);\n }\n\n /**\n * Handle an incoming JSON-RPC request tied to a specific scope by routing\n * to either a protocol Snap or an account Snap.\n *\n * Note: Addresses are considered case-sensitive by the MultichainRoutingService as\n * not all non-EVM chains are case-insensitive.\n *\n * @param options - An options bag.\n * @param options.connectedAddresses - Addresses currently connected to the\n * origin for the requested scope.\n * @param options.origin - The origin of the RPC request.\n * @param options.request - The JSON-RPC request.\n * @param options.scope - The CAIP-2 scope for the request.\n * @returns The response from the chosen Snap.\n * @throws If no handler was found.\n */\n async handleRequest({\n connectedAddresses,\n origin,\n scope,\n request: rawRequest,\n }: {\n connectedAddresses: CaipAccountId[];\n origin: string;\n scope: CaipChainId;\n request: JsonRpcRequest;\n }): Promise<Json> {\n // Explicitly block EVM scopes, just in case.\n assert(\n !scope.startsWith(KnownCaipNamespace.Eip155) &&\n !scope.startsWith('wallet:eip155'),\n );\n\n // Re-create the request to simplify and remove additional properties that may be present in MM middleware.\n const request = {\n jsonrpc: '2.0' as const,\n id: rawRequest.id ?? nanoid(),\n method: rawRequest.method,\n ...(rawRequest.params ? { params: rawRequest.params } : {}),\n };\n\n const { method, params } = request;\n\n // If the RPC request can be serviced by an account Snap, route it there.\n const accountId = await this.#getSnapAccountId(\n connectedAddresses,\n scope,\n request,\n );\n\n if (accountId) {\n return this.#withSnapKeyring(async ({ keyring }) =>\n keyring.submitRequest({\n origin,\n account: accountId,\n scope,\n method,\n params: params as JsonRpcParams,\n }),\n );\n }\n\n // If the RPC request cannot be serviced by an account Snap,\n // but has a protocol Snap available, route it there.\n const protocolSnaps = this.#getProtocolSnaps(scope);\n const protocolSnap = protocolSnaps.find((snap) =>\n snap.methods.includes(method),\n );\n\n if (protocolSnap) {\n return this.#messenger.call('SnapController:handleRequest', {\n snapId: protocolSnap.snapId,\n origin,\n request: {\n method: '',\n params: {\n request,\n scope,\n },\n },\n handler: HandlerType.OnProtocolRequest,\n }) as Promise<Json>;\n }\n\n // If no compatible account or protocol Snaps were found, throw.\n throw rpcErrors.methodNotFound();\n }\n\n /**\n * Get a list of metadata for supported accounts for a given scope from the client.\n *\n * @param scope - The CAIP-2 scope.\n * @param method - An optional method that the account should support.\n * @returns A list of metadata for the supported accounts.\n */\n #getSupportedAccountsMetadata(\n scope: CaipChainId,\n method?: string,\n ): (InternalAccount & {\n metadata: Required<InternalAccount['metadata']>;\n })[] {\n const runnableSnaps = this.#messenger\n .call('SnapController:getRunnableSnaps')\n .map((snap) => snap.id);\n\n return this.#messenger\n .call('AccountsController:listMultichainAccounts', scope)\n .filter(\n (\n account: InternalAccount,\n ): account is InternalAccount & {\n metadata: Required<InternalAccount['metadata']>;\n } =>\n account.metadata.snap?.id !== undefined &&\n runnableSnaps.includes(account.metadata.snap?.id) &&\n (method === undefined || account.methods.includes(method)),\n );\n }\n\n /**\n * Get a list of supported methods for a given scope.\n * This combines both protocol and account Snaps supported methods.\n *\n * @param scope - The CAIP-2 scope.\n * @returns A list of supported methods.\n */\n getSupportedMethods(scope: CaipChainId): string[] {\n const accountMethods = this.#getSupportedAccountsMetadata(scope).flatMap(\n (account) => account.methods,\n );\n\n const protocolMethods = this.#getProtocolSnaps(scope).flatMap(\n (snap) => snap.methods,\n );\n\n return Array.from(new Set([...accountMethods, ...protocolMethods]));\n }\n\n /**\n * Get a list of supported accounts for a given scope.\n *\n * @param scope - The CAIP-2 scope.\n * @returns A list of CAIP-10 addresses.\n */\n getSupportedAccounts(scope: CaipChainId): string[] {\n return this.#getSupportedAccountsMetadata(scope).map(\n (account) => `${scope}:${account.address}`,\n );\n }\n\n /**\n * Determine whether a given CAIP-2 scope is supported by the router.\n *\n * @param scope - The CAIP-2 scope.\n * @returns True if the router can service the scope, otherwise false.\n */\n isSupportedScope(scope: CaipChainId): boolean {\n // We currently assume here that if one Snap exists that service the scope, we can service the scope generally.\n return (\n this.#getSupportedAccountsMetadata(scope).length > 0 ||\n this.#getProtocolSnaps(scope).length > 0\n );\n }\n}\n"]} |
+1
-1
| { | ||
| "name": "@metamask/snaps-controllers", | ||
| "version": "20.0.2", | ||
| "version": "20.0.3", | ||
| "description": "Controllers for MetaMask Snaps", | ||
@@ -5,0 +5,0 @@ "keywords": [ |
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New alerts
Network access
Supply chain riskThis module accesses the network.
Found 1 instance in 1 package
Shell access
Supply chain riskThis module accesses the system shell. Accessing the system shell increases the risk of executing arbitrary code.
Found 1 instance in 1 package
Long strings
Supply chain riskContains long string literals, which may be a sign of obfuscated or packed code.
Found 1 instance in 1 package
Fixed alerts
Network access
Supply chain riskThis module accesses the network.
Found 1 instance in 1 package
Shell access
Supply chain riskThis module accesses the system shell. Accessing the system shell increases the risk of executing arbitrary code.
Found 1 instance in 1 package
Long strings
Supply chain riskContains long string literals, which may be a sign of obfuscated or packed code.
Found 1 instance in 1 package
Improved metrics
- Total package byte prevSize
2138836
0.04%- Lines of code
13294
0.02%No dependency changes