replace ethers with submodules

package.json

@@ -26,10 +26,11 @@
     "build:link": "yarn build && cd dist && yarn link && rm -rf node_modules && cd .."
   },
   "dependencies": {
+    "@ethersproject/bytes": "^5.7.0",
+    "@ethersproject/providers": "^5.7.0",
     "@metamask/controllers": "^30.0.0",
     "@types/lodash": "^4.14.176",
     "bignumber.js": "^9.0.1",
-    "ethers": "^5.5.1",
     "fast-json-patch": "^3.1.0",
     "isomorphic-fetch": "^3.0.0",
     "lodash": "^4.17.21"

src/SmartTransactionsController.ts

@@ -6,7 +6,7 @@ import {
   util,
 } from '@metamask/controllers';
 import { BigNumber } from 'bignumber.js';
-import { ethers } from 'ethers';
+import { Web3Provider } from '@ethersproject/providers';
 import mapValues from 'lodash/mapValues';
 import cloneDeep from 'lodash/cloneDeep';
 import {
@@ -132,7 +132,7 @@ export default class SmartTransactionsController extends BaseController<
 
     this.getNonceLock = getNonceLock;
     this.getNetwork = getNetwork;
-    this.ethersProvider = new ethers.providers.Web3Provider(provider);
+    this.ethersProvider = new Web3Provider(provider);
     this.confirmExternalTransaction = confirmExternalTransaction;
     this.trackMetaMetricsEvent = trackMetaMetricsEvent;
 
@@ -144,7 +144,7 @@ export default class SmartTransactionsController extends BaseController<
       this.configure({ chainId });
       this.initializeSmartTransactionsForChainId();
       this.checkPoll(this.state);
-      this.ethersProvider = new ethers.providers.Web3Provider(provider);
+      this.ethersProvider = new Web3Provider(provider);
     });
 
     this.subscribe((currentState: any) => this.checkPoll(currentState));

src/utils.ts

@@ -1,7 +1,7 @@
 import jsonDiffer from 'fast-json-patch';
 import _ from 'lodash';
 import { BigNumber } from 'bignumber.js';
-import { ethers } from 'ethers';
+import { hexlify } from '@ethersproject/bytes';
 import {
   APIType,
   SmartTransaction,
@@ -208,5 +208,5 @@ export const isSmartTransactionCancellable = (
 
 export const incrementNonceInHex = (nonceInHex: string): string => {
   const nonceInDec = new BigNumber(nonceInHex, 16).toString(10);
-  return ethers.utils.hexlify(Number(nonceInDec) + 1);
+  return hexlify(Number(nonceInDec) + 1);
 };