feat: add money account keyring to keyring controller, and create cash account service

.github/CODEOWNERS

@@ -38,6 +38,7 @@
 
 ## Earn Team
 /packages/earn-controller                   @MetaMask/metamask-earn
+/packages/money-account-service              @MetaMask/metamask-earn
 
 ## Social AI Team
 /packages/ai-controllers                    @MetaMask/social-ai
@@ -116,6 +117,7 @@
 /packages/remote-feature-flag-controller        @MetaMask/extension-platform @MetaMask/mobile-platform @MetaMask/core-platform
 /packages/storage-service                       @MetaMask/extension-platform @MetaMask/mobile-platform @MetaMask/core-platform
 /packages/client-controller                     @MetaMask/core-platform @MetaMask/extension-platform @MetaMask/mobile-platform
+/packages/money-account-service                  @MetaMask/accounts-engineers @MetaMask/metamask-earn
 
 ## Package Release related
 /packages/account-tree-controller/package.json  @MetaMask/accounts-engineers @MetaMask/core-platform
@@ -136,6 +138,9 @@
 /packages/assets-controllers/CHANGELOG.md         @MetaMask/metamask-assets @MetaMask/core-platform
 /packages/assets-controller/package.json          @MetaMask/metamask-assets @MetaMask/core-platform
 /packages/assets-controller/CHANGELOG.md          @MetaMask/metamask-assets @MetaMask/core-platform
+
+/packages/money-account-service/package.json       @MetaMask/metamask-earn @MetaMask/core-platform
+/packages/money-account-service/CHANGELOG.md       @MetaMask/metamask-earn @MetaMask/core-platform
 /packages/chain-agnostic-permission/package.json  @MetaMask/wallet-integrations @MetaMask/core-platform
 /packages/chain-agnostic-permission/CHANGELOG.md  @MetaMask/wallet-integrations @MetaMask/core-platform
 /packages/config-registry-controller/CHANGELOG.md @MetaMask/networks @MetaMask/core-platform

packages/accounts-controller/CHANGELOG.md

@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
+- Add support for `KeyringTypes.money` in `keyringTypeToName`, mapping it to `'Money Account'` ([#8204](https://github.com/MetaMask/core/pull/8204))
 - Add `:accounts{Added,Removed}` batch events ([#8151](https://github.com/MetaMask/core/pull/8151))
   - Those new events can be used instead of single `:accountAdded` and `:accountRemoved` events to reduce the number of events emitted during batch operations (e.g. `KeyringController` state re-synchronization).
 

packages/accounts-controller/src/AccountsController.test.ts

@@ -2726,6 +2726,7 @@ describe('AccountsController', () => {
       KeyringTypes.ledger,
       KeyringTypes.lattice,
       KeyringTypes.qr,
+      KeyringTypes.money,
     ])('should add accounts for %s type', async (keyringType) => {
       mockUUIDWithNormalAccounts([mockAccount]);
 

packages/accounts-controller/src/utils.ts

@@ -39,6 +39,9 @@ export function keyringTypeToName(keyringType: string): string {
     case KeyringTypes.qr: {
       return 'QR';
     }
+    case KeyringTypes.money: {
+      return 'Money Account';
+    }
     case KeyringTypes.snap: {
       return 'Snap Account';
     }

packages/keyring-controller/CHANGELOG.md

@@ -7,6 +7,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+
+- Add `KeyringTypes.money` (`'Money Keyring'`) to the `KeyringTypes` enum ([#8204](https://github.com/MetaMask/core/pull/8204))
+- Add `MoneyKeyring` (from `@metamask/eth-money-keyring`) as a built-in default keyring ([#8204](https://github.com/MetaMask/core/pull/8204))
+- Export `KeyringControllerErrorMessage` enum to allow consumers to distinguish specific controller error cases ([#8204](https://github.com/MetaMask/core/pull/8204))
+
 ### Changed
 
 - Bump `@metamask/keyring-api` from `^21.0.0` to `^21.6.0` ([#7857](https://github.com/MetaMask/core/pull/7857), [#8259](https://github.com/MetaMask/core/pull/8259))

packages/keyring-controller/package.json

@@ -51,6 +51,7 @@
     "@metamask/base-controller": "^9.0.0",
     "@metamask/browser-passworder": "^6.0.0",
     "@metamask/eth-hd-keyring": "^13.0.0",
+    "@metamask/eth-money-keyring": "1.0.0",
     "@metamask/eth-sig-util": "^8.2.0",
     "@metamask/eth-simple-keyring": "^11.0.0",
     "@metamask/keyring-api": "^21.6.0",

packages/keyring-controller/src/KeyringController.ts

@@ -3,6 +3,7 @@ import { isValidPrivate, getBinarySize } from '@ethereumjs/util';
 import { BaseController } from '@metamask/base-controller';
 import type * as encryptorUtils from '@metamask/browser-passworder';
 import { HdKeyring } from '@metamask/eth-hd-keyring';
+import { MoneyKeyring } from '@metamask/eth-money-keyring';
 import { normalize as ethNormalize } from '@metamask/eth-sig-util';
 import SimpleKeyring from '@metamask/eth-simple-keyring';
 import type {
@@ -55,6 +56,7 @@ export enum KeyringTypes {
   /* eslint-disable @typescript-eslint/naming-convention */
   simple = 'Simple Key Pair',
   hd = 'HD Key Tree',
+  money = 'Money Keyring',
   qr = 'QR Hardware Wallet Device',
   trezor = 'Trezor Hardware',
   oneKey = 'OneKey Hardware',
@@ -558,6 +560,7 @@ const defaultKeyringBuilders = [
   // @ts-expect-error keyring types are mismatched
   keyringBuilderFactory(SimpleKeyring),
   keyringBuilderFactory(HdKeyring),
+  keyringBuilderFactory(MoneyKeyring),
 ];
 
 export const getDefaultKeyringState = (): KeyringControllerState => {

packages/keyring-controller/src/index.ts

@@ -1,3 +1,4 @@
 export * from './KeyringController';
 export type * from './types';
 export * from './errors';
+export { KeyringControllerErrorMessage } from './constants';

packages/money-account-service/CHANGELOG.md

@@ -0,0 +1,15 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+### Added
+
+- Initial release ([#8204](https://github.com/MetaMask/core/pull/8204))
+
+### Fixed
+[Unreleased]: https://github.com/MetaMask/core/

packages/money-account-service/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2025 MetaMask
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

packages/money-account-service/README.md

@@ -0,0 +1,17 @@
+# `@metamask/money-account-service`
+
+Money account service.
+
+This service provides operations for creating and managing Money accounts derived from HD keyrings.
+
+## Installation
+
+`yarn add @metamask/money-account-service`
+
+or
+
+`npm install @metamask/money-account-service`
+
+## Contributing
+
+This package is part of a monorepo. Instructions for contributing can be found in the [monorepo README](https://github.com/MetaMask/core#readme).

packages/money-account-service/jest.config.js

@@ -0,0 +1,26 @@
+/*
+ * For a detailed explanation regarding each configuration property and type check, visit:
+ * https://jestjs.io/docs/configuration
+ */
+
+const merge = require('deepmerge');
+const path = require('path');
+
+const baseConfig = require('../../jest.config.packages');
+
+const displayName = path.basename(__dirname);
+
+module.exports = merge(baseConfig, {
+  // The display name when running multiple projects
+  displayName,
+
+  // An object that configures minimum threshold enforcement for coverage results
+  coverageThreshold: {
+    global: {
+      branches: 100,
+      functions: 100,
+      lines: 100,
+      statements: 100,
+    },
+  },
+});

packages/money-account-service/package.json

@@ -0,0 +1,73 @@
+{
+  "name": "@metamask/money-account-service",
+  "version": "0.0.0",
+  "description": "Service to manage money accounts",
+  "keywords": [
+    "MetaMask",
+    "Ethereum"
+  ],
+  "homepage": "https://github.com/MetaMask/core/tree/main/packages/money-account-service#readme",
+  "bugs": {
+    "url": "https://github.com/MetaMask/core/issues"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/MetaMask/core.git"
+  },
+  "license": "MIT",
+  "sideEffects": false,
+  "exports": {
+    ".": {
+      "import": {
+        "types": "./dist/index.d.mts",
+        "default": "./dist/index.mjs"
+      },
+      "require": {
+        "types": "./dist/index.d.cts",
+        "default": "./dist/index.cjs"
+      }
+    },
+    "./package.json": "./package.json"
+  },
+  "main": "./dist/index.cjs",
+  "types": "./dist/index.d.cts",
+  "files": [
+    "dist/"
+  ],
+  "scripts": {
+    "build": "ts-bridge --project tsconfig.build.json --verbose --clean --no-references",
+    "build:all": "ts-bridge --project tsconfig.build.json --verbose --clean",
+    "build:docs": "typedoc",
+    "changelog:update": "../../scripts/update-changelog.sh @metamask/money-account-service",
+    "changelog:validate": "../../scripts/validate-changelog.sh @metamask/money-account-service",
+    "since-latest-release": "../../scripts/since-latest-release.sh",
+    "test": "NODE_OPTIONS=--experimental-vm-modules jest --reporters=jest-silent-reporter",
+    "test:clean": "NODE_OPTIONS=--experimental-vm-modules jest --clearCache",
+    "test:verbose": "NODE_OPTIONS=--experimental-vm-modules jest --verbose",
+    "test:watch": "NODE_OPTIONS=--experimental-vm-modules jest --watch"
+  },
+  "dependencies": {
+    "@metamask/base-controller": "^9.0.0",
+    "@metamask/eth-hd-keyring": "^13.0.0",
+    "@metamask/keyring-controller": "^25.1.0",
+    "@metamask/messenger": "^0.3.0"
+  },
+  "devDependencies": {
+    "@metamask/auto-changelog": "^3.4.4",
+    "@ts-bridge/cli": "^0.6.4",
+    "@types/jest": "^29.5.14",
+    "deepmerge": "^4.2.2",
+    "jest": "^29.7.0",
+    "ts-jest": "^29.2.5",
+    "typedoc": "^0.25.13",
+    "typedoc-plugin-missing-exports": "^2.0.0",
+    "typescript": "~5.3.3"
+  },
+  "engines": {
+    "node": "^18.18 || >=20"
+  },
+  "publishConfig": {
+    "access": "public",
+    "registry": "https://registry.npmjs.org/"
+  }
+}

packages/money-account-service/src/MoneyAccountService-method-action-types.ts

@@ -0,0 +1,15 @@
+import type { MoneyAccountService } from './MoneyAccountService';
+
+export type MoneyAccountServiceCreateMoneyAccountAction = {
+  type: `MoneyAccountService:createMoneyAccount`;
+  handler: MoneyAccountService['createMoneyAccount'];
+};
+
+export type MoneyAccountServiceGetMoneyAccountAction = {
+  type: `MoneyAccountService:getMoneyAccount`;
+  handler: MoneyAccountService['getMoneyAccount'];
+};
+
+export type MoneyAccountServiceMethodActions =
+  | MoneyAccountServiceCreateMoneyAccountAction
+  | MoneyAccountServiceGetMoneyAccountAction;