chore: pass in provider into bridgecontroller so we can look up allow…

…ances

app/scripts/controllers/bridge/bridge-controller.ts

@@ -1,5 +1,9 @@
+import { Provider } from '@metamask/network-controller';
 import { BaseController, StateMetadata } from '@metamask/base-controller';
 import { Hex } from '@metamask/utils';
+import { Contract } from '@ethersproject/contracts';
+import { abiERC20 } from '@metamask/metamask-eth-abis';
+import { Web3Provider } from '@ethersproject/providers';
 import {
   fetchBridgeFeatureFlags,
   fetchBridgeTokens,
@@ -8,6 +12,7 @@ import { fetchTopAssetsList } from '../../../../ui/pages/swaps/swaps.util';
 import {
   BRIDGE_CONTROLLER_NAME,
   DEFAULT_BRIDGE_CONTROLLER_STATE,
+  METABRIDGE_CHAIN_TO_ADDRESS_MAP,
 } from './constants';
 import { BridgeControllerState, BridgeControllerMessenger } from './types';
 
@@ -23,14 +28,23 @@ export default class BridgeController extends BaseController<
   { bridgeState: BridgeControllerState },
   BridgeControllerMessenger
 > {
-  constructor({ messenger }: { messenger: BridgeControllerMessenger }) {
+  #provider: Provider;
+
+  constructor({
+    provider,
+    messenger,
+  }: {
+    provider: Provider;
+    messenger: BridgeControllerMessenger;
+  }) {
     super({
       name: BRIDGE_CONTROLLER_NAME,
       metadata,
       messenger,
       state: { bridgeState: DEFAULT_BRIDGE_CONTROLLER_STATE },
     });
 
+    // Register action handlers
     this.messagingSystem.registerActionHandler(
       `${BRIDGE_CONTROLLER_NAME}:setBridgeFeatureFlags`,
       this.setBridgeFeatureFlags.bind(this),
@@ -43,6 +57,9 @@ export default class BridgeController extends BaseController<
       `${BRIDGE_CONTROLLER_NAME}:selectDestNetwork`,
       this.selectDestNetwork.bind(this),
     );
+
+    // Assign vars
+    this.#provider = provider;
   }
 
   resetState = () => {
@@ -89,4 +106,17 @@ export default class BridgeController extends BaseController<
       _state.bridgeState = { ...bridgeState, [stateKey]: tokens };
     });
   };
+
+  getErc20Allowance = async (
+    contractAddress: string,
+    walletAddress: string,
+    chainId: Hex,
+  ) => {
+    const web3Provider = new Web3Provider(this.#provider);
+    const contract = new Contract(contractAddress, abiERC20, web3Provider);
+    return await contract.allowance(
+      walletAddress,
+      METABRIDGE_CHAIN_TO_ADDRESS_MAP[chainId],
+    );
+  };
 }

app/scripts/controllers/bridge/constants.ts

@@ -1,3 +1,6 @@
+import { Hex } from '@metamask/utils';
+import { METABRIDGE_ETHEREUM_ADDRESS } from '../../../../shared/constants/bridge';
+import { CHAIN_IDS } from '../../../../shared/constants/network';
 import { BridgeControllerState, BridgeFeatureFlagsKey } from './types';
 
 export const BRIDGE_CONTROLLER_NAME = 'BridgeController';
@@ -13,3 +16,7 @@ export const DEFAULT_BRIDGE_CONTROLLER_STATE: BridgeControllerState = {
   destTokens: {},
   destTopAssets: [],
 };
+
+export const METABRIDGE_CHAIN_TO_ADDRESS_MAP: Record<Hex, string> = {
+  [CHAIN_IDS.MAINNET]: METABRIDGE_ETHEREUM_ADDRESS,
+};

app/scripts/metamask-controller.js

@@ -1981,6 +1981,7 @@ export default class MetamaskController extends EventEmitter {
       allowedEvents: [],
     });
     this.bridgeController = new BridgeController({
+      provider: this.provider,
       messenger: bridgeControllerMessenger,
     });