seed phrase verifier

1 files changed, 43 insertions, 0 deletions

diff --git a/app/scripts/lib/seed-phrase-verifier.js b/app/scripts/lib/seed-phrase-verifier.js
new file mode 100644
index 000000000..9bea2910e
--- /dev/null
+++ b/app/scripts/lib/seed-phrase-verifier.js
@@ -0,0 +1,43 @@
+const KeyringController = require('eth-keyring-controller')
+
+const seedPhraseVerifier = {
+
+  verifyAccounts(createdAccounts, seedWords) {
+
+    return new Promise((resolve, reject) => {
+
+      if (!createdAccounts || createdAccounts.length < 1) {
+        return reject(new Error('No created accounts defined.'))
+      }
+
+      let keyringController = new KeyringController({})
+      let Keyring = keyringController.getKeyringClassForType('HD Key Tree')
+      let opts = {
+        mnemonic: seedWords,
+        numberOfAccounts: createdAccounts.length,
+      }
+
+      let keyring = new Keyring(opts)
+      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"))
+          }
+
+          for (let i = 0; i < restoredAccounts.length; i++) {
+            if (restoredAccounts[i] !== createdAccounts[i]) {
+              return reject(new Error('Not identical accounts! Original: ' + createdAccounts[i] + ', Restored: ' + restoredAccounts[i]))
+            }
+          }
+          return resolve()
+        })
+    })
+  }
+}
+
+module.exports = seedPhraseVerifier
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