feat: Add account upgrade and check status RPC methods

app/scripts/controller-init/utils.ts

@@ -196,7 +196,9 @@ function getControllerOrThrow<Name extends ControllerName>(
   const controller = controllersByName[name];
 
   if (!controller) {
-    throw new Error(`Controller requested before it was initialized: ${name}`);
+    throw new Error(
+      `Controller requested before it was initialized: ${String(name)}`,
+    );
   }
 
   return controller;

app/scripts/controllers/permissions/specifications.js

@@ -170,6 +170,8 @@ export const unrestrictedMethods = Object.freeze([
   'wallet_registerOnboarding',
   'wallet_sendCalls',
   'wallet_switchEthereumChain',
+  'wallet_upgradeAccount',
+  'wallet_getAccountUpgradeStatus',
   'wallet_watchAsset',
   'web3_clientVersion',
   'web3_sha3',

app/scripts/lib/rpc-method-middleware/handlers/index.ts

@@ -6,13 +6,19 @@ import requestAccounts from './request-accounts';
 import sendMetadata from './send-metadata';
 import switchEthereumChain from './switch-ethereum-chain';
 import watchAsset from './watch-asset';
+import {
+  upgradeAccountHandler,
+  getAccountUpgradeStatusHandler,
+} from './wallet-upgrade-account';
 
 export const handlers = [
   addEthereumChain,
   getProviderState,
   logWeb3ShimUsage,
   sendMetadata,
   watchAsset,
+  upgradeAccountHandler,
+  getAccountUpgradeStatusHandler,
 ];
 
 export const eip1193OnlyHandlers = [