chore: #12184 MVP split engine file

.github/CODEOWNERS

@@ -8,8 +8,10 @@ app/component-library/               @MetaMask/design-system-engineers
 
 # Platform Team
 patches/                             @MetaMask/mobile-platform
-app/core/Engine.ts                   @MetaMask/mobile-platform
-app/core/Engine.test.js              @MetaMask/mobile-platform
+app/core/Engine/Engine.ts            @MetaMask/mobile-platform
+app/core/Engine/Engine.test.ts       @MetaMask/mobile-platform
+app/core/Engine/index.ts             @MetaMask/mobile-platform
+app/core/Engine/types.ts             @MetaMask/mobile-platform
 app/core/Analytics/                  @MetaMask/mobile-platform
 app/util/metrics/                    @MetaMask/mobile-platform
 app/components/hooks/useMetrics/     @MetaMask/mobile-platform
@@ -41,7 +43,8 @@ app/reducers/sdk   @MetaMask/sdk-devs @MetaMask/mobile-platform
 app/util/walletconnect.js   @MetaMask/sdk-devs @MetaMask/mobile-platform
 
 # Accounts Team
-app/core/Encryptor/                  @MetaMask/accounts-engineers
+app/core/Encryptor/   @MetaMask/accounts-engineers
+app/core/Engine/controller/AccountsController   @MetaMask/accounts-engineers
 
 # Swaps Team
 app/components/UI/Swaps              @MetaMask/swaps-engineers @MetaMask/mobile-platform

app/components/Nav/Main/index.test.tsx

@@ -10,7 +10,7 @@ import { MetaMetricsEvents } from '../../hooks/useMetrics';
 import { renderHookWithProvider } from '../../../util/test/renderWithProvider';
 import Engine from '../../../core/Engine';
 
-jest.mock('../../../core/Engine.ts', () => ({
+jest.mock('../../../core/Engine', () => ({
   controllerMessenger: {
     subscribeOnceIf: jest.fn(),
   },

app/components/UI/AccountOverview/index.test.tsx

@@ -11,7 +11,7 @@ import {
 
 const mockedEngine = Engine;
 
-jest.mock('../../../core/Engine.ts', () => {
+jest.mock('../../../core/Engine', () => {
   const { MOCK_ACCOUNTS_CONTROLLER_STATE: mockAccountsControllerState } =
     jest.requireActual('../../../util/test/accountsControllerTestUtils');
   return {

app/components/UI/AssetSearch/index.test.tsx

@@ -5,7 +5,7 @@ import { backgroundState } from '../../../util/test/initial-root-state';
 import Engine from '../../../core/Engine';
 const mockedEngine = Engine;
 
-jest.mock('../../../core/Engine.ts', () => ({
+jest.mock('../../../core/Engine', () => ({
   init: () => mockedEngine.init({}),
   context: {
     KeyringController: {

app/components/Views/AccountActions/AccountActions.test.tsx

@@ -28,7 +28,6 @@ const initialState = {
 };
 
 jest.mock('../../../core/Engine', () => ({
-  ...jest.requireActual('../../../core/Engine'),
   context: {
     PreferencesController: {
       selectedAddress: `0xC4966c0D659D99699BFD7EB54D8fafEE40e4a756`,

app/components/Views/Asset/index.test.js

@@ -13,7 +13,7 @@ const mockInitialState = {
   },
 };
 
-jest.mock('../../../core/Engine.ts', () => {
+jest.mock('../../../core/Engine', () => {
   const {
     MOCK_ADDRESS_1,
   } = require('../../../util/test/accountsControllerTestUtils');

app/components/Views/confirmations/Approval/index.test.tsx

@@ -19,7 +19,7 @@ jest.mock('../../../../util/dappTransactions', () => ({
   handleGetGasLimit: jest.fn(),
 }));
 
-jest.mock('../../../../core/Engine.ts', () => ({
+jest.mock('../../../../core/Engine', () => ({
   rejectPendingApproval: jest.fn(),
   context: {
     KeyringController: {

app/components/Views/confirmations/ApproveView/Approve/index.test.tsx

@@ -21,7 +21,7 @@ jest.mock('../../../../../core/GasPolling/GasPolling', () => ({
   stopGasPolling: jest.fn().mockResolvedValue(null),
 }));
 
-jest.mock('../../../../../core/Engine.ts', () => ({
+jest.mock('../../../../../core/Engine', () => ({
   controllerMessenger: {
     tryUnsubscribe: jest.fn(),
     subscribe: jest.fn(),
@@ -59,7 +59,8 @@ const routeMock = {
 };
 const hideModalMock = jest.fn();
 
-const renderComponent = ({ store }: { store: Store }) => render(
+const renderComponent = ({ store }: { store: Store }) =>
+  render(
     <Provider store={store}>
       <ThemeContext.Provider value={mockTheme}>
         <NavigationContainer>

app/core/Engine.test.ts → app/core/Engine/Engine.test.ts

@@ -1,27 +1,24 @@
-import Engine, {
-  Engine as EngineClass,
-  EngineState,
-  TransactionEventPayload,
-} from './Engine';
-import { backgroundState } from '../util/test/initial-root-state';
+import Engine, { Engine as EngineClass } from './Engine';
+import { EngineState, TransactionEventPayload } from './types';
+import { backgroundState } from '../../util/test/initial-root-state';
 import { zeroAddress } from 'ethereumjs-util';
-import { createMockAccountsControllerState } from '../util/test/accountsControllerTestUtils';
-import { mockNetworkState } from '../util/test/network';
-import MetaMetrics from './Analytics/MetaMetrics';
-import { store } from '../store';
-import { MetaMetricsEvents } from './Analytics';
+import { createMockAccountsControllerState } from '../../util/test/accountsControllerTestUtils';
+import { mockNetworkState } from '../../util/test/network';
+import MetaMetrics from '../Analytics/MetaMetrics';
+import { store } from '../../store';
+import { MetaMetricsEvents } from '../Analytics';
 import { NetworkState } from '@metamask/network-controller';
 import { Hex } from '@metamask/utils';
-import { MarketDataDetails } from '../components/UI/Tokens';
+import { MarketDataDetails } from '../../components/UI/Tokens';
 import { TransactionMeta } from '@metamask/transaction-controller';
-import { RootState } from '../reducers';
-import { MetricsEventBuilder } from './Analytics/MetricsEventBuilder';
+import { RootState } from '../../reducers';
+import { MetricsEventBuilder } from '../Analytics/MetricsEventBuilder';
 
 jest.unmock('./Engine');
-jest.mock('../store', () => ({
+jest.mock('../../store', () => ({
   store: { getState: jest.fn(() => ({ engine: {} })) },
 }));
-jest.mock('../selectors/smartTransactionsController', () => ({
+jest.mock('../../selectors/smartTransactionsController', () => ({
   selectShouldUseSmartTransaction: jest.fn().mockReturnValue(false),
 }));
 
@@ -276,11 +273,17 @@ describe('Engine', () => {
         AccountTrackerController: {
           accountsByChainId: {
             [chainId]: {
-              [selectedAddress]: { balance: (ethBalance * 1e18).toString(), stakedBalance: (stakedEthBalance * 1e18).toString() },
+              [selectedAddress]: {
+                balance: (ethBalance * 1e18).toString(),
+                stakedBalance: (stakedEthBalance * 1e18).toString(),
+              },
             },
           },
           accounts: {
-            [selectedAddress]: { balance: (ethBalance * 1e18).toString(), stakedBalance: (stakedEthBalance * 1e18).toString() },
+            [selectedAddress]: {
+              balance: (ethBalance * 1e18).toString(),
+              stakedBalance: (stakedEthBalance * 1e18).toString(),
+            },
           },
         },
         TokensController: {