From 70d9f0db93012a4a1f2a018ac4104b2b601cef80 Mon Sep 17 00:00:00 2001
From: "Ryan X. Charles" <ryan@bitpay.com>
Date: Wed, 17 Sep 2014 14:41:51 -0700
Subject: [PATCH] use base58check in extendedPublicKeyString

---
 lib/bip32.js | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/lib/bip32.js b/lib/bip32.js
index b5c34d1..a4e6876 100644
--- a/lib/bip32.js
+++ b/lib/bip32.js
@@ -140,12 +140,9 @@ BIP32.prototype.buildExtendedPublicKey = function() {
 
 BIP32.prototype.extendedPublicKeyString = function(format) {
   if (format === undefined || format === 'base58') {
-    var hash = Hash.sha256sha256(this.extendedPublicKey);
-    var checksum = hash.slice(0, 4);
-    var data = Buffer.concat([this.extendedPublicKey, checksum]);
-    return base58.encode(data);
+    return Base58Check.encode(this.extendedPublicKey);
   } else if (format === 'hex') {
-    return this.extendedPublicKey.toString('hex');;
+    return this.extendedPublicKey.toString('hex');
   } else {
     throw new Error('bad format');
   }