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type { SupportedCurve } from '@metamask/key-tree';\nimport { isValidBIP32PathSegment } from '@metamask/key-tree';\nimport type { EmptyObject, InitialPermissions } from '@metamask/snaps-sdk';\nimport type { Describe, Infer, Struct } from '@metamask/superstruct';\nimport {\n  array,\n  boolean,\n  create,\n  enums,\n  integer,\n  is,\n  literal,\n  object,\n  optional,\n  refine,\n  record,\n  size,\n  string,\n  type,\n  union,\n  intersection,\n} from '@metamask/superstruct';\nimport {\n  assertStruct,\n  ChecksumStruct,\n  VersionStruct,\n  isValidSemVerRange,\n  inMilliseconds,\n  Duration,\n  CaipChainIdStruct,\n} from '@metamask/utils';\n\nimport { isDerivationPathEqual } from '../array';\nimport { CronjobSpecificationArrayStruct } from '../cronjob';\nimport { SIP_6_MAGIC_VALUE, STATE_ENCRYPTION_MAGIC_VALUE } from '../entropy';\nimport { KeyringOriginsStruct, RpcOriginsStruct } from '../json-rpc';\nimport { KeyringCapabilitiesStruct } from '../keyring';\nimport { SnapIdStruct } from '../snaps';\nimport { mergeStructs, type InferMatching } from '../structs';\nimport { NameStruct, NpmSnapFileNames, uri } from '../types';\n\n// BIP-43 purposes that cannot be used for entropy derivation. These are in the\n// string form, ending with `'`.\nconst FORBIDDEN_PURPOSES: string[] = [\n  SIP_6_MAGIC_VALUE,\n  STATE_ENCRYPTION_MAGIC_VALUE,\n];\n\nconst FORBIDDEN_PURPOSE_PATHS: string[][] = FORBIDDEN_PURPOSES.map(\n  (purpose) => ['m', `${purpose}`],\n);\n\nexport const FORBIDDEN_COIN_TYPES: number[] = [60];\nconst FORBIDDEN_COIN_TYPE_PATHS: string[][] = FORBIDDEN_COIN_TYPES.map(\n  (coinType) => ['m', \"44'\", `${coinType}'`],\n);\n\nexport const Bip32PathStruct = refine(\n  array(string()),\n  'BIP-32 path',\n  (path: string[]) => {\n    if (path.length === 0) {\n      return 'Path must be a non-empty BIP-32 derivation path array';\n    }\n\n    if (path[0] !== 'm') {\n      return 'Path must start with \"m\".';\n    }\n\n    if (path.length < 3) {\n      return 'Paths must have a length of at least three.';\n    }\n\n    if (path.slice(1).some((part) => !isValidBIP32PathSegment(part))) {\n      return 'Path must be a valid BIP-32 derivation path array.';\n    }\n\n    if (\n      FORBIDDEN_PURPOSE_PATHS.some((forbiddenPath) =>\n        isDerivationPathEqual(\n          path.slice(0, forbiddenPath.length),\n          forbiddenPath,\n        ),\n      )\n    ) {\n      return `The purpose \"${path[1]}\" is not allowed for entropy derivation.`;\n    }\n\n    if (\n      FORBIDDEN_COIN_TYPE_PATHS.some((forbiddenPath) =>\n        isDerivationPathEqual(\n          path.slice(0, forbiddenPath.length),\n          forbiddenPath,\n        ),\n      )\n    ) {\n      return `The path \"${path.join(\n        '/',\n      )}\" is not allowed for entropy derivation.`;\n    }\n\n    return true;\n  },\n);\n\nexport const bip32entropy = <\n  Type extends { path: string[]; curve: string },\n  Schema,\n>(\n  struct: Struct<Type, Schema>,\n) =>\n  refine(struct, 'BIP-32 entropy', (value) => {\n    if (\n      value.curve === 'ed25519' &&\n      value.path.slice(1).some((part) => !part.endsWith(\"'\"))\n    ) {\n      return 'Ed25519 does not support unhardened paths.';\n    }\n\n    return true;\n  });\n\nexport const CurveStruct: Describe<SupportedCurve> = enums([\n  'ed25519',\n  'secp256k1',\n  'ed25519Bip32',\n]);\n\n// Used outside @metamask/snap-utils\nexport const Bip32EntropyStruct = bip32entropy(\n  type({\n    path: Bip32PathStruct,\n    curve: CurveStruct,\n  }),\n);\n\nexport type Bip32Entropy = Infer<typeof Bip32EntropyStruct>;\n\nexport const SnapGetBip32EntropyPermissionsStruct = size(\n  array(Bip32EntropyStruct),\n  1,\n  Infinity,\n);\n\nexport const SemVerRangeStruct = refine(string(), 'SemVer range', (value) => {\n  if (isValidSemVerRange(value)) {\n    return true;\n  }\n  return 'Expected a valid SemVer range.';\n});\n\nexport const SnapIdsStruct = refine(\n  record(SnapIdStruct, object({ version: optional(SemVerRangeStruct) })),\n  'SnapIds',\n  (value) => {\n    if (Object.keys(value).length === 0) {\n      return false;\n    }\n\n    return true;\n  },\n);\n\nexport type SnapIds = Infer<typeof SnapIdsStruct>;\n\nexport const ChainIdsStruct = size(array(CaipChainIdStruct), 1, Infinity);\n\nexport const LookupMatchersStruct = union([\n  object({\n    tlds: size(array(string()), 1, Infinity),\n  }),\n  object({\n    schemes: size(array(string()), 1, Infinity),\n  }),\n  object({\n    tlds: size(array(string()), 1, Infinity),\n    schemes: size(array(string()), 1, Infinity),\n  }),\n]);\n\nexport const MINIMUM_REQUEST_TIMEOUT = inMilliseconds(5, Duration.Second);\nexport const MAXIMUM_REQUEST_TIMEOUT = inMilliseconds(3, Duration.Minute);\n\nexport const MaxRequestTimeStruct = size(\n  integer(),\n  MINIMUM_REQUEST_TIMEOUT,\n  MAXIMUM_REQUEST_TIMEOUT,\n);\n\nexport const ProtocolScopesStruct = record(\n  CaipChainIdStruct,\n  object({ methods: array(string()) }),\n);\n\n// Utility type to union with for all handler structs\nexport const HandlerCaveatsStruct = object({\n  maxRequestTime: optional(MaxRequestTimeStruct),\n});\n\nexport type HandlerCaveats = Infer<typeof HandlerCaveatsStruct>;\n\nexport const EmptyObjectStruct = object<EmptyObject>({}) as unknown as Struct<\n  EmptyObject,\n  null\n>;\n\n/* eslint-disable @typescript-eslint/naming-convention */\nexport const PermissionsStruct: Describe<InitialPermissions> = type({\n  'endowment:assets': optional(\n    mergeStructs(HandlerCaveatsStruct, object({ scopes: ChainIdsStruct })),\n  ),\n  'endowment:cronjob': optional(\n    mergeStructs(\n      HandlerCaveatsStruct,\n      object({ jobs: optional(CronjobSpecificationArrayStruct) }),\n    ),\n  ),\n  'endowment:ethereum-provider': optional(EmptyObjectStruct),\n  'endowment:keyring': optional(\n    mergeStructs(\n      HandlerCaveatsStruct,\n      KeyringOriginsStruct,\n      KeyringCapabilitiesStruct,\n    ),\n  ),\n  'endowment:protocol': optional(\n    mergeStructs(\n      HandlerCaveatsStruct,\n      object({ scopes: ProtocolScopesStruct }),\n    ),\n  ),\n  'endowment:lifecycle-hooks': optional(HandlerCaveatsStruct),\n  'endowment:name-lookup': optional(\n    mergeStructs(\n      HandlerCaveatsStruct,\n      object({\n        chains: optional(ChainIdsStruct),\n        matchers: optional(LookupMatchersStruct),\n      }),\n    ),\n  ),\n  'endowment:network-access': optional(EmptyObjectStruct),\n  'endowment:page-home': optional(HandlerCaveatsStruct),\n  'endowment:rpc': optional(\n    mergeStructs(HandlerCaveatsStruct, RpcOriginsStruct),\n  ),\n  'endowment:signature-insight': optional(\n    mergeStructs(\n      HandlerCaveatsStruct,\n      object({\n        allowSignatureOrigin: optional(boolean()),\n      }),\n    ),\n  ),\n  'endowment:transaction-insight': optional(\n    mergeStructs(\n      HandlerCaveatsStruct,\n      object({\n        allowTransactionOrigin: optional(boolean()),\n      }),\n    ),\n  ),\n  'endowment:webassembly': optional(EmptyObjectStruct),\n  snap_dialog: optional(EmptyObjectStruct),\n  snap_manageState: optional(EmptyObjectStruct),\n  snap_manageAccounts: optional(EmptyObjectStruct),\n  snap_notify: optional(EmptyObjectStruct),\n  snap_getBip32Entropy: optional(SnapGetBip32EntropyPermissionsStruct),\n  snap_getBip32PublicKey: optional(SnapGetBip32EntropyPermissionsStruct),\n  snap_getBip44Entropy: optional(\n    size(\n      array(object({ coinType: size(integer(), 0, 2 ** 32 - 1) })),\n      1,\n      Infinity,\n    ),\n  ),\n  snap_getEntropy: optional(EmptyObjectStruct),\n  snap_getLocale: optional(EmptyObjectStruct),\n  wallet_snap: optional(SnapIdsStruct),\n});\n/* eslint-enable @typescript-eslint/naming-convention */\n\nexport type SnapPermissions = InferMatching<\n  typeof PermissionsStruct,\n  InitialPermissions\n>;\n\nexport const SnapAuxiliaryFilesStruct = array(string());\n\n/**\n * @deprecated Use SnapAuxiliaryFilesStruct instead. This was a typo that has been fixed.\n */\nexport const SnapAuxilaryFilesStruct = SnapAuxiliaryFilesStruct;\n\nexport const InitialConnectionsStruct = record(\n  intersection([string(), uri()]),\n  object({}),\n);\n\nexport type InitialConnections = Infer<typeof InitialConnectionsStruct>;\n\nexport const SnapManifestStruct = object({\n  extends: optional(size(string(), 1, Infinity)),\n  version: VersionStruct,\n  description: size(string(), 1, 280),\n  proposedName: size(string(), 1, 214),\n  repository: optional(\n    type({\n      type: size(string(), 1, Infinity),\n      url: size(string(), 1, Infinity),\n    }),\n  ),\n  source: object({\n    shasum: ChecksumStruct,\n    location: object({\n      npm: object({\n        filePath: size(string(), 1, Infinity),\n        iconPath: optional(size(string(), 1, Infinity)),\n        packageName: NameStruct,\n        registry: union([\n          literal('https://registry.npmjs.org'),\n          literal('https://registry.npmjs.org/'),\n        ]),\n      }),\n    }),\n    files: optional(SnapAuxiliaryFilesStruct),\n    locales: optional(SnapAuxiliaryFilesStruct),\n  }),\n  initialConnections: optional(InitialConnectionsStruct),\n  initialPermissions: PermissionsStruct,\n  manifestVersion: literal('0.1'),\n  platformVersion: optional(VersionStruct),\n  $schema: optional(string()), // enables JSON-Schema linting in VSC and other IDEs\n});\n\nexport type SnapManifest = Infer<typeof SnapManifestStruct>;\n\n/**\n * Check if the given value is a valid {@link SnapManifest} object.\n *\n * @param value - The value to check.\n * @returns Whether the value is a valid {@link SnapManifest} object.\n */\nexport function isSnapManifest(value: unknown): value is SnapManifest {\n  return is(value, SnapManifestStruct);\n}\n\n/**\n * Assert that the given value is a valid {@link SnapManifest} object.\n *\n * @param value - The value to check.\n * @throws If the value is not a valid {@link SnapManifest} object.\n */\nexport function assertIsSnapManifest(\n  value: unknown,\n): asserts value is SnapManifest {\n  assertStruct(\n    value,\n    SnapManifestStruct,\n    `\"${NpmSnapFileNames.Manifest}\" is invalid`,\n  );\n}\n\n/**\n * Creates a {@link SnapManifest} object from JSON.\n *\n * @param value - The value to check.\n * @throws If the value cannot be coerced to a {@link SnapManifest} object.\n * @returns The created {@link SnapManifest} object.\n */\nexport function createSnapManifest(value: unknown): SnapManifest {\n  // TODO: Add a utility to prefix these errors similar to assertStruct\n  return create(value, SnapManifestStruct);\n}\n"]}