feat: add money-account-controller

.github/CODEOWNERS

@@ -12,6 +12,7 @@
 /packages/multichain-account-service         @MetaMask/accounts-engineers
 /packages/account-tree-controller            @MetaMask/accounts-engineers
 /packages/profile-sync-controller            @MetaMask/accounts-engineers
+/packages/money-account-controller           @MetaMask/accounts-engineers
 
 ## Assets Team
 /packages/assets-controllers         @MetaMask/metamask-assets
@@ -222,3 +223,5 @@
 /packages/client-controller/CHANGELOG.md @MetaMask/core-platform @MetaMask/extension-platform @MetaMask/mobile-platform
 /packages/social-controllers/package.json @MetaMask/social-ai @MetaMask/core-platform
 /packages/social-controllers/CHANGELOG.md @MetaMask/social-ai @MetaMask/core-platform
+/packages/money-account-controller/package.json @MetaMask/accounts-engineers @MetaMask/core-platform
+/packages/money-account-controller/CHANGELOG.md @MetaMask/accounts-engineers @MetaMask/core-platform

README.md

@@ -64,6 +64,7 @@ Each package in this repository has its own README where you can find installati
 - [`@metamask/logging-controller`](packages/logging-controller)
 - [`@metamask/message-manager`](packages/message-manager)
 - [`@metamask/messenger`](packages/messenger)
+- [`@metamask/money-account-controller`](packages/money-account-controller)
 - [`@metamask/multichain-account-service`](packages/multichain-account-service)
 - [`@metamask/multichain-api-middleware`](packages/multichain-api-middleware)
 - [`@metamask/multichain-network-controller`](packages/multichain-network-controller)
@@ -148,6 +149,7 @@ linkStyle default opacity:0.5
   logging_controller(["@metamask/logging-controller"]);
   message_manager(["@metamask/message-manager"]);
   messenger(["@metamask/messenger"]);
+  money_account_controller(["@metamask/money-account-controller"]);
   multichain_account_service(["@metamask/multichain-account-service"]);
   multichain_api_middleware(["@metamask/multichain-api-middleware"]);
   multichain_network_controller(["@metamask/multichain-network-controller"]);

packages/money-account-controller/CHANGELOG.md

@@ -0,0 +1,14 @@
+# 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
+
+- Add `MoneyAccountController` ([#8361](https://github.com/MetaMask/core/pull/8361))
+
+[Unreleased]: https://github.com/MetaMask/core/

packages/money-account-controller/LICENSE

@@ -0,0 +1,20 @@
+MIT License
+
+Copyright (c) 2026 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

packages/money-account-controller/README.md

@@ -0,0 +1,15 @@
+# `@metamask/money-account-controller`
+
+MetaMask Money account controller.
+
+## Installation
+
+`yarn add @metamask/money-account-controller`
+
+or
+
+`npm install @metamask/money-account-controller`
+
+## 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-controller/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-controller/package.json

@@ -0,0 +1,80 @@
+{
+  "name": "@metamask/money-account-controller",
+  "version": "0.0.0",
+  "description": "MetaMask Money account controller",
+  "keywords": [
+    "MetaMask",
+    "Ethereum"
+  ],
+  "homepage": "https://github.com/MetaMask/core/tree/main/packages/money-account-controller#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-controller",
+    "changelog:validate": "../../scripts/validate-changelog.sh @metamask/money-account-controller",
+    "generate-method-action-types": "tsx ../../packages/messenger/src/generate-action-types/cli.ts",
+    "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/accounts-controller": "^37.2.0",
+    "@metamask/base-controller": "^9.0.1",
+    "@metamask/eth-money-keyring": "^2.0.0",
+    "@metamask/keyring-api": "^21.6.0",
+    "@metamask/keyring-controller": "^25.2.0",
+    "@metamask/messenger": "^1.1.0",
+    "async-mutex": "^0.5.0"
+  },
+  "devDependencies": {
+    "@metamask/auto-changelog": "^3.4.4",
+    "@metamask/keyring-utils": "^3.1.0",
+    "@metamask/utils": "^11.9.0",
+    "@ts-bridge/cli": "^0.6.4",
+    "@types/jest": "^29.5.14",
+    "deepmerge": "^4.2.2",
+    "jest": "^29.7.0",
+    "ts-jest": "^29.2.5",
+    "tsx": "^4.20.5",
+    "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-controller/src/MoneyAccountController-method-action-types.ts

@@ -0,0 +1,51 @@
+/**
+ * This file is auto generated.
+ * Do not edit manually.
+ */
+
+import type { MoneyAccountController } from './MoneyAccountController';
+
+/**
+ * Creates a money account for the given entropy source. If an account
+ * already exists for that entropy source, it is returned as-is (idempotent).
+ *
+ * @param entropySource - The entropy source ID to create the money account for.
+ * @returns The money account.
+ */
+export type MoneyAccountControllerCreateMoneyAccountAction = {
+  type: `MoneyAccountController:createMoneyAccount`;
+  handler: MoneyAccountController['createMoneyAccount'];
+};
+
+/**
+ * Gets a money account by its associated entropy source ID. If no ID is
+ * provided, the primary entropy source will be used.
+ *
+ * @param selector - Selector options for getting the money account.
+ * @param selector.entropySource - The entropy source ID to get the money account for. If not provided, the primary entropy source will be used.
+ * @returns The money account, or `undefined` if no account exists for the given entropy source.
+ */
+export type MoneyAccountControllerGetMoneyAccountAction = {
+  type: `MoneyAccountController:getMoneyAccount`;
+  handler: MoneyAccountController['getMoneyAccount'];
+};
+
+/**
+ * Resets the controller state to its default, removing all money accounts.
+ *
+ * Intended for use during a full app reset (e.g. when the user wipes all
+ * wallet data). Does not interact with the keyring — the caller is
+ * responsible for ensuring the associated keyring state is also cleared.
+ */
+export type MoneyAccountControllerClearStateAction = {
+  type: `MoneyAccountController:clearState`;
+  handler: MoneyAccountController['clearState'];
+};
+
+/**
+ * Union of all MoneyAccountController action types.
+ */
+export type MoneyAccountControllerMethodActions =
+  | MoneyAccountControllerCreateMoneyAccountAction
+  | MoneyAccountControllerGetMoneyAccountAction
+  | MoneyAccountControllerClearStateAction;