feat: add MoneyKeyring keyring V2 wrapper (#554)

Added a v2 wrapper for the `MoneyKeyring`. Since the underlying keyring
is an `HDKeyring`, this wrapper is just converting the underlying
accounts to `KeyringAccount`.

Note: `deleteAccount` was added to satisfy the v2 interface but is a
no-op since deletion of Money accounts is not supported.

<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> **Medium Risk**
> Touches account exposure and signing request handling for money
accounts, but follows the same EthKeyringWrapper pattern as other ETH
keyrings with extensive new tests.
> 
> **Overview**
> Adds a **v2 `MoneyKeyring` adapter** for `@metamask/eth-money-keyring`
that wraps the existing legacy keyring behind the unified `Keyring` API
(`@metamask/keyring-sdk/v2`’s `EthKeyringWrapper`).
> 
> Consumers can import it via the new
**`@metamask/eth-money-keyring/v2`** export (plus a Browserify `v2.js`
shim). The wrapper maps the inner HD-backed money keyring to
**`KeyringAccount`** objects: EOA scope, mnemonic entropy metadata on
`MONEY_DERIVATION_PATH`, and a **fixed signing method set** (personal
sign, typed data v1–v4, EIP-7702 authorization). Account lifecycle is
**strictly single-account**: `getAccounts`/`createAccounts` only allow
index `0`, reject other BIP-44 creation types and entropy mismatches,
and **`deleteAccount` is intentionally a no-op** to satisfy the v2
interface without removing money accounts. Package metadata, changelog,
README dependency graph, and **`@metamask/keyring-sdk`** dependency are
updated accordingly; broad Jest coverage exercises account shape,
creation guards, serialize/deserialize, and signing requests.
> 
> <sup>Reviewed by [Cursor Bugbot](https://cursor.com/bugbot) for commit
8761382. Bugbot is set up for automated
code reviews on this repo. Configure
[here](https://www.cursor.com/dashboard/bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

Author: hmalik88

README.md

@@ -75,6 +75,7 @@ linkStyle default opacity:0.5
   eth_ledger_bridge_keyring --> keyring_utils;
   eth_money_keyring --> keyring_eth_hd;
   eth_money_keyring --> keyring_api;
+  eth_money_keyring --> keyring_sdk;
   eth_money_keyring --> keyring_utils;
   eth_qr_keyring --> keyring_api;
   eth_qr_keyring --> keyring_sdk;

packages/keyring-eth-money/CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+
+- Add `MoneyKeyring` v2 wrapper ([#554](https://github.com/MetaMask/accounts/pull/554))
+
 ### Changed
 
 - **BREAKING:** Remove `signTransaction` pass-through; Money accounts do not sign transactions ([#521](https://github.com/MetaMask/accounts/pull/521))

packages/keyring-eth-money/package.json

@@ -16,7 +16,8 @@
     "url": "https://github.com/MetaMask/accounts.git"
   },
   "files": [
-    "dist/"
+    "dist/",
+    "v2.js"
   ],
   "sideEffects": false,
   "main": "./dist/index.cjs",
@@ -32,6 +33,16 @@
         "default": "./dist/index.cjs"
       }
     },
+    "./v2": {
+      "import": {
+        "types": "./dist/v2/index.d.mts",
+        "default": "./dist/v2/index.mjs"
+      },
+      "require": {
+        "types": "./dist/v2/index.d.cts",
+        "default": "./dist/v2/index.cjs"
+      }
+    },
     "./package.json": "./package.json"
   },
   "publishConfig": {
@@ -57,6 +68,7 @@
   "dependencies": {
     "@metamask/eth-hd-keyring": "^14.1.1",
     "@metamask/keyring-api": "^23.1.0",
+    "@metamask/keyring-sdk": "^2.1.1",
     "@metamask/keyring-utils": "^3.3.1",
     "@metamask/superstruct": "^3.1.0",
     "async-mutex": "^0.5.0"

packages/keyring-eth-money/src/v2/index.ts

@@ -0,0 +1,2 @@
+export { MoneyKeyring } from './money-keyring';
+export { MONEY_DERIVATION_PATH } from '../money-keyring';