Feat/eip 7702 internal rpc middleware

.github/CODEOWNERS

@@ -31,6 +31,7 @@
 
 ## Delegation Team
 /packages/gator-permissions-controller @MetaMask/delegation
+/packages/eip-7702-internal-rpc-middleware @MetaMask/delegation @MetaMask/core-platform
 
 ## Earn Team
 /packages/earn-controller                   @MetaMask/earn

README.md

@@ -37,6 +37,7 @@ Each package in this repository has its own README where you can find installati
 - [`@metamask/delegation-controller`](packages/delegation-controller)
 - [`@metamask/earn-controller`](packages/earn-controller)
 - [`@metamask/eip-5792-middleware`](packages/eip-5792-middleware)
+- [`@metamask/eip-7702-internal-rpc-middleware`](packages/eip-7702-internal-rpc-middleware)
 - [`@metamask/eip1193-permission-middleware`](packages/eip1193-permission-middleware)
 - [`@metamask/ens-controller`](packages/ens-controller)
 - [`@metamask/error-reporting-service`](packages/error-reporting-service)
@@ -101,6 +102,7 @@ linkStyle default opacity:0.5
   delegation_controller(["@metamask/delegation-controller"]);
   earn_controller(["@metamask/earn-controller"]);
   eip_5792_middleware(["@metamask/eip-5792-middleware"]);
+  eip_7702_internal_rpc_middleware(["@metamask/eip-7702-internal-rpc-middleware"]);
   eip1193_permission_middleware(["@metamask/eip1193-permission-middleware"]);
   ens_controller(["@metamask/ens-controller"]);
   error_reporting_service(["@metamask/error-reporting-service"]);
@@ -264,6 +266,7 @@ linkStyle default opacity:0.5
   permission_log_controller --> json_rpc_engine;
   phishing_controller --> base_controller;
   phishing_controller --> controller_utils;
+  phishing_controller --> transaction_controller;
   polling_controller --> base_controller;
   polling_controller --> controller_utils;
   polling_controller --> network_controller;
@@ -292,6 +295,7 @@ linkStyle default opacity:0.5
   signature_controller --> controller_utils;
   signature_controller --> accounts_controller;
   signature_controller --> approval_controller;
+  signature_controller --> gator_permissions_controller;
   signature_controller --> keyring_controller;
   signature_controller --> logging_controller;
   signature_controller --> network_controller;

packages/eip-7702-internal-rpc-middleware/CHANGELOG.md

@@ -0,0 +1,20 @@
+# 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 of @metamask/eip-7702-internal-rpc-middleware ([#6789](https://github.com/MetaMask/core/pull/6789))
+- `wallet_upgradeAccount` JSON-RPC method for upgrading EOA accounts to smart accounts using EIP-7702 ([#6789](https://github.com/MetaMask/core/pull/6789))
+- `wallet_getAccountUpgradeStatus` JSON-RPC method for checking account upgrade status ([#6789](https://github.com/MetaMask/core/pull/6789))
+- Hook-based architecture with `upgradeAccount` and `getAccountUpgradeStatus` hooks ([#6789](https://github.com/MetaMask/core/pull/6789))
+- Comprehensive TypeScript type definitions ([#6789](https://github.com/MetaMask/core/pull/6789))
+- Full test coverage with Jest ([#6789](https://github.com/MetaMask/core/pull/6789))
+- Documentation and examples ([#6789](https://github.com/MetaMask/core/pull/6789))
+
+[Unreleased]: https://github.com/MetaMask/core/

packages/eip-7702-internal-rpc-middleware/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/eip-7702-internal-rpc-middleware/README.md

@@ -0,0 +1,98 @@
+# `@metamask/eip-7702-internal-rpc-middleware`
+
+Implements internal JSON-RPC methods that support EIP-7702 account upgrade functionality. These methods are internal to MetaMask and not defined in [EIP-7702](https://eips.ethereum.org/EIPS/eip-7702), but provide the necessary infrastructure for EIP-7702 account upgrades.
+
+## Installation
+
+`yarn add @metamask/eip-7702-internal-rpc-middleware`
+
+or
+
+`npm install @metamask/eip-7702-internal-rpc-middleware`
+
+## JSON-RPC Methods
+
+### wallet_upgradeAccount
+
+Upgrades an EOA account to a smart account using EIP-7702.
+
+**Parameters:**
+
+- `account` (string): Address of the EOA to upgrade
+- `chainId` (number, optional): Chain ID for the upgrade (defaults to current)
+
+**Returns:**
+
+- `transactionHash` (string): Hash of the EIP-7702 authorization transaction
+- `upgradedAccount` (string): Address of the upgraded account (same as input)
+- `delegatedTo` (string): Address of the contract delegated to
+
+**Example:**
+
+```json
+{
+  "method": "wallet_upgradeAccount",
+  "params": [
+    {
+      "account": "0x1234567890123456789012345678901234567890",
+      "chainId": 1
+    }
+  ]
+}
+```
+
+### wallet_getAccountUpgradeStatus
+
+Checks if an account has been upgraded using EIP-7702.
+
+**Parameters:**
+
+- `account` (string): Address of the account to check
+- `chainId` (number, optional): Chain ID for the check (defaults to current)
+
+**Returns:**
+
+- `account` (string): Address of the checked account
+- `isUpgraded` (boolean): Whether the account is upgraded
+- `upgradedAddress` (string | null): Address to which the account is upgraded (null if not upgraded)
+- `chainId` (number): Chain ID where the check was performed
+
+**Example:**
+
+```json
+{
+  "method": "wallet_getAccountUpgradeStatus",
+  "params": [
+    {
+      "account": "0x1234567890123456789012345678901234567890",
+      "chainId": 1
+    }
+  ]
+}
+```
+
+**Example Response (Upgraded Account):**
+
+```json
+{
+  "account": "0x1234567890123456789012345678901234567890",
+  "isUpgraded": true,
+  "upgradedAddress": "0xabcdef1234567890abcdef1234567890abcdef12",
+  "chainId": 1
+}
+```
+
+**Example Response (Non-Upgraded Account):**
+
+```json
+{
+  "account": "0x1234567890123456789012345678901234567890",
+  "isUpgraded": false,
+  "upgradedAddress": null,
+  "chainId": 1
+}
+```
+
+## 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/eip-7702-internal-rpc-middleware/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/eip-7702-internal-rpc-middleware/package.json

@@ -0,0 +1,72 @@
+{
+  "name": "@metamask/eip-7702-internal-rpc-middleware",
+  "version": "1.0.0",
+  "description": "Implements internal JSON-RPC methods for EIP-7702 account upgrade functionality",
+  "keywords": [
+    "MetaMask",
+    "Ethereum"
+  ],
+  "homepage": "https://github.com/MetaMask/core/tree/main/packages/eip-7702-internal-rpc-middleware#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:docs": "typedoc",
+    "changelog:update": "../../scripts/update-changelog.sh @metamask/eip-7702-internal-rpc-middleware",
+    "changelog:validate": "../../scripts/validate-changelog.sh @metamask/eip-7702-internal-rpc-middleware",
+    "publish:preview": "yarn npm publish --tag preview",
+    "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/controller-utils": "^11.14.0",
+    "@metamask/rpc-errors": "^7.0.2",
+    "@metamask/superstruct": "^3.1.0",
+    "@metamask/utils": "^11.8.1"
+  },
+  "devDependencies": {
+    "@metamask/auto-changelog": "^3.4.4",
+    "@types/jest": "^27.4.1",
+    "deepmerge": "^4.2.2",
+    "jest": "^27.5.1",
+    "ts-jest": "^27.1.4",
+    "typedoc": "^0.24.8",
+    "typedoc-plugin-missing-exports": "^2.0.0",
+    "typescript": "~5.2.2"
+  },
+  "engines": {
+    "node": "^18.18 || >=20"
+  },
+  "publishConfig": {
+    "access": "public",
+    "registry": "https://registry.npmjs.org/"
+  }
+}

packages/eip-7702-internal-rpc-middleware/src/constants.ts

@@ -0,0 +1,7 @@
+// Method names
+export const METHOD_NAMES = {
+  UPGRADE_ACCOUNT: 'wallet_upgradeAccount',
+  GET_ACCOUNT_UPGRADE_STATUS: 'wallet_getAccountUpgradeStatus',
+} as const;
+
+export const DELEGATION_INDICATOR_PREFIX = '0xef0100';