@metamask/snaps-rpc-methods/dist/middleware/preinstalled-snaps.cjs.map

MetaMask Snaps JSON-RPC method implementations

{"version":3,"file":"preinstalled-snaps.cjs","sourceRoot":"","sources":["../../src/middleware/preinstalled-snaps.ts"],"names":[],"mappings":";;;AAKA,uDAAgD;AAChD,2CAMyB;AAEzB,wDAA+C;AAuB/C,MAAM,cAAc,GAAG,eAAe,CAAC;AAWvC;;;;;;;;;GASG;AACH,SAAgB,iCAAiC,CAAC,EAChD,iBAAiB,EACjB,cAAc,EACd,gBAAgB,GACiB;IACjC,OAAO,SAAS,gBAAgB,CAAC,OAAO,EAAE,SAAS,EAAE,IAAI,EAAE,IAAI;QAC7D,IAAI,OAAO,CAAC,MAAM,CAAC,UAAU,CAAC,MAAM,CAAC,EAAE,CAAC;YACtC,OAAO,IAAI,EAAE,CAAC;QAChB,CAAC;QAED,MAAM,WAAW,GAAG,cAAc,EAAE,CAAC;QAErC,IACE,CAAC,WAAW;YACZ,CAAC,IAAA,mBAAW,EAAC,WAAW,EAAE,2BAAc,CAAC,gBAAgB,CAAC,EAC1D,CAAC;YACD,OAAO,IAAI,EAAE,CAAC;QAChB,CAAC;QAED,MAAM,iBAAiB,GAAG,WAAW,CAAC,kBAAkB,CAAC,CAAC;QAC1D,MAAM,cAAc,GAAG,iBAAiB,EAAE,OAAO,EAAE,IAAI,CACrD,CAAC,MAAM,EAAE,EAAE,CAAC,MAAM,CAAC,IAAI,KAAK,kBAAkB,CAC/C,EAAE,KAA0C,CAAC;QAE9C,MAAM,sBAAsB,GAAG,cAAc,EAAE,cAAc,IAAI,EAAE,CAAC;QACpE,MAAM,sBAAsB,GAAG,cAAc,EAAE,cAAc,IAAI,EAAE,CAAC;QAEpE,MAAM,mBAAmB,GACvB,sBAAsB,CAAC,cAAc,CAAC,EAAE,QAAQ,CAAC,GAAG,CAAC,CAAC,OAAO,EAAE,EAAE,CAC/D,OAAO,CAAC,KAAK,CAAC,cAAc,CAAC,MAAM,GAAG,CAAC,CAAC,CACzC,IAAI,EAAE,CAAC;QAEV,MAAM,WAAW,GAAG,iBAAiB,EAAE,CAAC;QAExC,IAAI,IAAA,qBAAO,EAAC,WAAW,EAAE,mBAAmB,CAAC,EAAE,CAAC;YAC9C,OAAO,IAAI,EAAE,CAAC;QAChB,CAAC;QAED,gBAAgB,CAAC;YACf,kBAAkB,EAAE;gBAClB,OAAO,EAAE;oBACP;wBACE,IAAI,EAAE,kBAAkB;wBACxB,KAAK,EAAE;4BACL,cAAc,EAAE,sBAAsB;4BACtC,cAAc,EAAE;gCACd,GAAG,sBAAsB;gCACzB,CAAC,cAAc,CAAC,EAAE;oCAChB,QAAQ,EAAE,WAAW,CAAC,GAAG,CACvB,CAAC,OAAO,EAAE,EAAE,CAAC,GAAG,cAAc,IAAI,OAAO,EAAE,CAC5C;iCACF;6BACF;4BACD,iBAAiB,EAAE,EAAE;4BACrB,kBAAkB,EAAE,KAAK;yBAC1B;qBACF;iBACF;aACF;SACF,CAAC,CAAC;QAEH,OAAO,IAAI,EAAE,CAAC;IAChB,CAAC,CAAC;AACJ,CAAC;AA/DD,8EA+DC","sourcesContent":["import type { JsonRpcMiddleware } from '@metamask/json-rpc-engine';\nimport type {\n  PermissionConstraint,\n  RequestedPermissions,\n} from '@metamask/permission-controller';\nimport { isEqual } from '@metamask/snaps-utils';\nimport {\n  type CaipAccountId,\n  type CaipChainId,\n  hasProperty,\n  type Json,\n  type JsonRpcParams,\n} from '@metamask/utils';\n\nimport { SnapEndowments } from '../endowments';\n\nexport type PreinstalledSnapsMiddlewareHooks = {\n  /**\n   * Get all accounts with the eip155 scope.\n   *\n   * @returns A list of all account addresses from the eip155 scope.\n   */\n  getAllEvmAccounts: () => string[];\n  /**\n   * Get the current permissions for the requesting origin.\n   *\n   * @returns An object containing the metadata about each permission.\n   */\n  getPermissions: () => Record<string, PermissionConstraint> | undefined;\n  /**\n   * Grant the passed permissions to the origin.\n   *\n   * @param permissions\n   */\n  grantPermissions: (permissions: RequestedPermissions) => void;\n};\n\nconst WILDCARD_SCOPE = 'wallet:eip155';\n\ntype ScopesObject = Record<CaipChainId, { accounts: CaipAccountId[] }>;\n\ntype AuthorizedScopeCaveat = {\n  requiredScopes: ScopesObject;\n  optionalScopes: ScopesObject;\n  sessionProperties: Record<string, Json>;\n  isMultichainOrigin: boolean;\n};\n\n/**\n * Create a middleware that automatically grants account permissions to preinstalled Snaps\n * that want to use the Ethereum provider endowment.\n *\n * @param hooks - The hooks used by the middleware.\n * @param hooks.getAllEvmAccounts - Hook for retriveing all available EVM addresses.\n * @param hooks.getPermissions - Hook for retrieving the permissions of the requesting origin.\n * @param hooks.grantPermissions - Hook for granting permissions to the requesting origin.\n * @returns The middleware.\n */\nexport function createPreinstalledSnapsMiddleware({\n  getAllEvmAccounts,\n  getPermissions,\n  grantPermissions,\n}: PreinstalledSnapsMiddlewareHooks): JsonRpcMiddleware<JsonRpcParams, Json> {\n  return function methodMiddleware(request, _response, next, _end) {\n    if (request.method.startsWith('snap')) {\n      return next();\n    }\n\n    const permissions = getPermissions();\n\n    if (\n      !permissions ||\n      !hasProperty(permissions, SnapEndowments.EthereumProvider)\n    ) {\n      return next();\n    }\n\n    const existingEndowment = permissions['endowment:caip25'];\n    const existingCaveat = existingEndowment?.caveats?.find(\n      (caveat) => caveat.type === 'authorizedScopes',\n    )?.value as AuthorizedScopeCaveat | undefined;\n\n    const existingRequiredScopes = existingCaveat?.requiredScopes ?? {};\n    const existingOptionalScopes = existingCaveat?.optionalScopes ?? {};\n\n    const existingEvmAccounts =\n      existingOptionalScopes[WILDCARD_SCOPE]?.accounts.map((account) =>\n        account.slice(WILDCARD_SCOPE.length + 1),\n      ) ?? [];\n\n    const evmAccounts = getAllEvmAccounts();\n\n    if (isEqual(evmAccounts, existingEvmAccounts)) {\n      return next();\n    }\n\n    grantPermissions({\n      'endowment:caip25': {\n        caveats: [\n          {\n            type: 'authorizedScopes',\n            value: {\n              requiredScopes: existingRequiredScopes,\n              optionalScopes: {\n                ...existingOptionalScopes,\n                [WILDCARD_SCOPE]: {\n                  accounts: evmAccounts.map(\n                    (account) => `${WILDCARD_SCOPE}:${account}`,\n                  ),\n                },\n              },\n              sessionProperties: {},\n              isMultichainOrigin: false,\n            },\n          },\n        ],\n      },\n    });\n\n    return next();\n  };\n}\n"]}