From c41419b6ef6d33db27a04563197afedd86410735 Mon Sep 17 00:00:00 2001
From: "Ryan X. Charles" <ryan@bitpay.com>
Date: Wed, 17 Sep 2014 14:49:17 -0700
Subject: [PATCH] use buffer functions

...instead of adhoc uint functions
---
 lib/bip32.js  | 33 +++------------------------------
 test/bip32.js |  1 -
 2 files changed, 3 insertions(+), 31 deletions(-)

diff --git a/lib/bip32.js b/lib/bip32.js
index 1444071..3264e76 100644
--- a/lib/bip32.js
+++ b/lib/bip32.js
@@ -68,10 +68,10 @@ BIP32.prototype.initFromBytes = function(bytes) {
   if (bytes.length != 78)
     throw new Error('not enough data');
 
-  this.version = u32(bytes.slice(0, 4));
-  this.depth = u8(bytes.slice(4, 5));
+  this.version = bytes.slice(0, 4).readUInt32BE(0);
+  this.depth = bytes.slice(4, 5).readUInt8(0);
   this.parentFingerprint = bytes.slice(5, 9);
-  this.childIndex = u32(bytes.slice(9, 13));
+  this.childIndex = bytes.slice(9, 13).readUInt32BE(0);
   this.chainCode = bytes.slice(13, 45);
 
   var keyBytes = bytes.slice(45, 78);
@@ -303,31 +303,4 @@ BIP32.prototype.toString = function() {
     return this.extendedPublicKeyString();
 };
 
-function uint(f, size) {
-  if (f.length < size)
-    throw new Error('not enough data');
-  var n = 0;
-  for (var i = 0; i < size; i++) {
-    n *= 256;
-    n += f[i];
-  }
-  return n;
-}
-
-function u8(f) {
-  return uint(f, 1);
-}
-
-function u16(f) {
-  return uint(f, 2);
-}
-
-function u32(f) {
-  return uint(f, 4);
-}
-
-function u64(f) {
-  return uint(f, 8);
-}
-
 module.exports = BIP32;
diff --git a/test/bip32.js b/test/bip32.js
index 82643b7..96f0d33 100644
--- a/test/bip32.js
+++ b/test/bip32.js
@@ -324,7 +324,6 @@ describe('BIP32', function() {
       tip32b.toString().slice(0, 4).should.equal('tpub');
     });
 
-
   });
 
 });