feat: SOL-46 adds the multichain transactions controller package

.github/CODEOWNERS

@@ -59,6 +59,7 @@
 /packages/permission-log-controller    @MetaMask/wallet-api-platform-engineers @MetaMask/wallet-framework-engineers
 /packages/selected-network-controller  @MetaMask/wallet-api-platform-engineers @MetaMask/wallet-framework-engineers @MetaMask/metamask-assets
 /packages/profile-sync-controller      @MetaMask/notifications @MetaMask/identity
+/packages/multichain-transactions-controller @MetaMask/solana-wallet-snap-team @MetaMask/cet-btc-team
 
 ## Package Release related
 /packages/accounts-controller/package.json        @MetaMask/accounts-engineers @MetaMask/wallet-framework-engineers

README.md

@@ -39,6 +39,7 @@ 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/multichain`](packages/multichain)
+- [`@metamask/multichain-transactions-controller`](packages/multichain-transactions-controller)
 - [`@metamask/name-controller`](packages/name-controller)
 - [`@metamask/network-controller`](packages/network-controller)
 - [`@metamask/notification-services-controller`](packages/notification-services-controller)
@@ -50,6 +51,7 @@ Each package in this repository has its own README where you can find installati
 - [`@metamask/profile-sync-controller`](packages/profile-sync-controller)
 - [`@metamask/queued-request-controller`](packages/queued-request-controller)
 - [`@metamask/rate-limit-controller`](packages/rate-limit-controller)
+- [`@metamask/remote-feature-flag-controller`](packages/remote-feature-flag-controller)
 - [`@metamask/selected-network-controller`](packages/selected-network-controller)
 - [`@metamask/signature-controller`](packages/signature-controller)
 - [`@metamask/transaction-controller`](packages/transaction-controller)
@@ -82,6 +84,7 @@ linkStyle default opacity:0.5
   logging_controller(["@metamask/logging-controller"]);
   message_manager(["@metamask/message-manager"]);
   multichain(["@metamask/multichain"]);
+  multichain_transactions_controller(["@metamask/multichain-transactions-controller"]);
   name_controller(["@metamask/name-controller"]);
   network_controller(["@metamask/network-controller"]);
   notification_services_controller(["@metamask/notification-services-controller"]);
@@ -93,6 +96,7 @@ linkStyle default opacity:0.5
   profile_sync_controller(["@metamask/profile-sync-controller"]);
   queued_request_controller(["@metamask/queued-request-controller"]);
   rate_limit_controller(["@metamask/rate-limit-controller"]);
+  remote_feature_flag_controller(["@metamask/remote-feature-flag-controller"]);
   selected_network_controller(["@metamask/selected-network-controller"]);
   signature_controller(["@metamask/signature-controller"]);
   transaction_controller(["@metamask/transaction-controller"]);
@@ -167,6 +171,8 @@ linkStyle default opacity:0.5
   queued_request_controller --> network_controller;
   queued_request_controller --> selected_network_controller;
   rate_limit_controller --> base_controller;
+  remote_feature_flag_controller --> base_controller;
+  remote_feature_flag_controller --> controller_utils;
   selected_network_controller --> base_controller;
   selected_network_controller --> json_rpc_engine;
   selected_network_controller --> network_controller;

packages/multichain-transactions-controller/CHANGELOG.md

@@ -0,0 +1,10 @@
+# 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]
+
+[Unreleased]: https://github.com/MetaMask/core/

packages/multichain-transactions-controller/LICENSE

@@ -0,0 +1,20 @@
+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

packages/multichain-transactions-controller/README.md

@@ -0,0 +1,15 @@
+# `@metamask/multichain-transactions-controller`
+
+This package is responsible for getting transactions from our Bitcoin and Solana snaps.
+
+## Installation
+
+`yarn add @metamask/multichain-transactions-controller`
+
+or
+
+`npm install @metamask/multichain-transactions-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/multichain-transactions-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: 80,
+      functions: 95,
+      lines: 90,
+      statements: 90,
+    },
+  },
+});

packages/multichain-transactions-controller/package.json

@@ -0,0 +1,84 @@
+{
+  "name": "@metamask/multichain-transactions-controller",
+  "version": "0.0.0",
+  "description": "This package is responsible for getting transactions from our Bitcoin and Solana snaps",
+  "keywords": [
+    "MetaMask",
+    "Ethereum"
+  ],
+  "homepage": "https://github.com/MetaMask/core/tree/main/packages/multichain-transactions-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:docs": "typedoc",
+    "changelog:update": "../../scripts/update-changelog.sh @metamask/multichain-transactions-controller",
+    "changelog:validate": "../../scripts/validate-changelog.sh @metamask/multichain-transactions-controller",
+    "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/base-controller": "^7.1.0",
+    "@metamask/keyring-api": "^13.0.0",
+    "@metamask/polling-controller": "^12.0.2",
+    "@metamask/snaps-utils": "^8.3.0",
+    "@metamask/utils": "^11.0.1",
+    "immer": "^9.0.6"
+  },
+  "devDependencies": {
+    "@metamask/accounts-controller": "^20.0.2",
+    "@metamask/auto-changelog": "^3.4.4",
+    "@metamask/keyring-controller": "^19.0.2",
+    "@metamask/keyring-internal-api": "^1.1.0",
+    "@metamask/keyring-snap-client": "^1.0.0",
+    "@metamask/snaps-controllers": "^9.10.0",
+    "@metamask/snaps-sdk": "^6.7.0",
+    "@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"
+  },
+  "peerDependencies": {
+    "@metamask/accounts-controller": "^20.0.0",
+    "@metamask/keyring-controller": "^19.0.0"
+  },
+  "engines": {
+    "node": "^18.18 || >=20"
+  },
+  "publishConfig": {
+    "access": "public",
+    "registry": "https://registry.npmjs.org/"
+  }
+}