Use async/await for seedPhraseVerifier.verifyAccounts (#9100)

app/scripts/lib/seed-phrase-verifier.js

@@ -16,12 +16,9 @@ const seedPhraseVerifier = {
    * @returns {Promise<void>} - Promises undefined
    *
   */
-  verifyAccounts (createdAccounts, seedWords) {
+  async verifyAccounts (createdAccounts, seedWords) {
-
-    return new Promise((resolve, reject) => {
-
     if (!createdAccounts || createdAccounts.length < 1) {
-        return reject(new Error('No created accounts defined.'))
+      throw new Error('No created accounts defined.')
     }
 
     const keyringController = new KeyringController({})
@@ -32,25 +29,20 @@ const seedPhraseVerifier = {
     }
 
     const keyring = new Keyring(opts)
-      keyring.getAccounts()
+    const restoredAccounts = await keyring.getAccounts()
-        .then((restoredAccounts) => {
-
     log.debug('Created accounts: ' + JSON.stringify(createdAccounts))
     log.debug('Restored accounts: ' + JSON.stringify(restoredAccounts))
 
     if (restoredAccounts.length !== createdAccounts.length) {
       // this should not happen...
-            return reject(new Error('Wrong number of accounts'))
+      throw new Error('Wrong number of accounts')
     }
 
     for (let i = 0; i < restoredAccounts.length; i++) {
       if (restoredAccounts[i].toLowerCase() !== createdAccounts[i].toLowerCase()) {
-              return reject(new Error('Not identical accounts! Original: ' + createdAccounts[i] + ', Restored: ' + restoredAccounts[i]))
+        throw new Error('Not identical accounts! Original: ' + createdAccounts[i] + ', Restored: ' + restoredAccounts[i])
       }
     }
-          return resolve()
-        })
-    })
   },
 }