init controller

app/core/Engine/Engine.ts

@@ -228,6 +228,7 @@ import { multichainNetworkControllerInit } from './controllers/multichain-networ
 import { currencyRateControllerInit } from './controllers/currency-rate-controller/currency-rate-controller-init';
 import { EarnController } from '@metamask/earn-controller';
 import { TransactionControllerInit } from './controllers/transaction-controller';
+import { defiPositionsControllerInit } from './controllers/defi-positions-controller/defi-positions-controller-init';
 
 const NON_EMPTY = 'NON_EMPTY';
 
@@ -1132,6 +1133,7 @@ export class Engine {
         TransactionController: TransactionControllerInit,
         CurrencyRateController: currencyRateControllerInit,
         MultichainNetworkController: multichainNetworkControllerInit,
+        DeFiPositionsController: defiPositionsControllerInit,
         ///: BEGIN:ONLY_INCLUDE_IF(preinstalled-snaps,external-snaps)
         CronjobController: cronjobControllerInit,
         ///: END:ONLY_INCLUDE_IF
@@ -1488,6 +1490,7 @@ export class Engine {
       BridgeController: bridgeController,
       BridgeStatusController: bridgeStatusController,
       EarnController: earnController,
+      DeFiPositionsController: controllersByName.DeFiPositionsController,
     };
 
     const childControllers = Object.assign({}, this.context);

app/core/Engine/controllers/defi-positions-controller/defi-positions-controller-init.ts

@@ -0,0 +1,26 @@
+import {
+  DeFiPositionsController,
+  DeFiPositionsControllerMessenger,
+} from '@metamask/assets-controllers';
+import type { ControllerInitFunction } from '../../types';
+
+/**
+ * Initialize the DeFiPositionsController.
+ *
+ * @param request - The request object.
+ * @returns The DeFiPositionsController.
+ */
+export const defiPositionsControllerInit: ControllerInitFunction<
+  DeFiPositionsController,
+  DeFiPositionsControllerMessenger
+> = (request) => {
+  const { controllerMessenger, persistedState } = request;
+
+  const controller = new DeFiPositionsController({
+    messenger: controllerMessenger,
+    state: persistedState.DeFiPositionsController,
+    apiUrl: 'http://localhost:3000',
+  });
+
+  return { controller };
+};

app/core/Engine/types.ts

@@ -574,7 +574,8 @@ export type ControllersToInitialize =
   | 'CurrencyRateController'
   | 'AccountsController'
   | 'MultichainNetworkController'
-  | 'TransactionController';
+  | 'TransactionController'
+  | 'DeFiPositionsController';
 
 /**
  * Callback that returns a controller messenger for a specific controller.