@metamask/snaps-rpc-methods/dist/endowments/transaction-insight.cjs.map

MetaMask Snaps JSON-RPC method implementations

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it is intended to be used as a flag\n * by the extension to detect whether the snap has the capability to show information on the transaction confirmation screen.\n *\n * @param _builderOptions - Optional specification builder options.\n * @returns The specification for the transaction-insight endowment.\n */\nconst specificationBuilder: PermissionSpecificationBuilder<\n  PermissionType.Endowment,\n  any,\n  TransactionInsightEndowmentSpecification\n> = (_builderOptions?: unknown) => {\n  return {\n    permissionType: PermissionType.Endowment,\n    targetName: permissionName,\n    allowedCaveats: [\n      SnapCaveatType.TransactionOrigin,\n      SnapCaveatType.MaxRequestTime,\n    ],\n    endowmentGetter: (_getterOptions?: EndowmentGetterParams) => null,\n    validator: createGenericPermissionValidator([\n      { type: SnapCaveatType.TransactionOrigin, optional: true },\n      { type: SnapCaveatType.MaxRequestTime, optional: true },\n    ]),\n    subjectTypes: [SubjectType.Snap],\n  };\n};\n\nexport const transactionInsightEndowmentBuilder = Object.freeze({\n  targetName: permissionName,\n  specificationBuilder,\n} as const);\n\n/**\n * Validates the type of the caveat value.\n *\n * @param caveat - The caveat to validate.\n * @throws If the caveat value is invalid.\n */\nfunction validateCaveat(caveat: Caveat<string, any>): void {\n  if (!hasProperty(caveat, 'value') || !isPlainObject(caveat)) {\n    throw rpcErrors.invalidParams({\n      message: 'Expected a plain object.',\n    });\n  }\n\n  const { value } = caveat;\n\n  assert(\n    typeof value === 'boolean',\n    'Expected caveat value to have type \"boolean\"',\n  );\n}\n\n/**\n * Map a raw value from the `initialPermissions` to a caveat specification.\n * Note that this function does not do any validation, that's handled by the\n * PermissionsController when the permission is requested.\n *\n * @param value - The raw value from the `initialPermissions`.\n * @returns The caveat specification.\n */\nexport function getTransactionInsightCaveatMapper(\n  value: Json,\n): Pick<PermissionConstraint, 'caveats'> {\n  if (\n    !value ||\n    !isObject(value) ||\n    (isObject(value) && Object.keys(value).length === 0)\n  ) {\n    return { caveats: null };\n  }\n  return {\n    caveats: [\n      {\n        type: SnapCaveatType.TransactionOrigin,\n        value:\n          hasProperty(value, 'allowTransactionOrigin') &&\n          (value.allowTransactionOrigin as boolean),\n      },\n    ],\n  };\n}\n\n/**\n * Getter function to get the transaction origin caveat from a permission.\n *\n * This does basic validation of the caveat, but does not validate the type or\n * value of the namespaces object itself, as this is handled by the\n * `PermissionsController` when the permission is requested.\n *\n * @param permission - The permission to get the transaction origin caveat from.\n * @returns The transaction origin, or `null` if the permission does not have a\n * transaction origin caveat.\n */\nexport function getTransactionOriginCaveat(\n  permission?: PermissionConstraint,\n): boolean | null {\n  if (!permission?.caveats) {\n    return null;\n  }\n\n  assert(permission.caveats.length === 1);\n  assert(permission.caveats[0].type === SnapCaveatType.TransactionOrigin);\n\n  const caveat = permission.caveats[0] as Caveat<string, boolean>;\n\n  return caveat.value ?? null;\n}\n\nexport const transactionInsightCaveatSpecifications: Record<\n  SnapCaveatType.TransactionOrigin,\n  CaveatSpecificationConstraint\n> = {\n  [SnapCaveatType.TransactionOrigin]: Object.freeze({\n    type: SnapCaveatType.TransactionOrigin,\n    validator: (caveat: Caveat<string, any>) => validateCaveat(caveat),\n  }),\n};\n"]}