From 16ce63ca806b5145e81574c72b7cf26c12f16513 Mon Sep 17 00:00:00 2001
From: Stephen Pair <stephen@bitpay.com>
Date: Sun, 7 Jul 2013 14:28:11 -0400
Subject: [PATCH] add ability to set the version

---
 BitcoinAddress.js | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/BitcoinAddress.js b/BitcoinAddress.js
index 345256412..b01657024 100644
--- a/BitcoinAddress.js
+++ b/BitcoinAddress.js
@@ -9,13 +9,20 @@ function ClassSpec(b) {
   };
 
   // return the bitcoin address version (the first byte of the address)
-  BitcoinAddress.prototype.version = function() {
+  BitcoinAddress.prototype.version = function(num) {
+    if(num || (num === 0)) {
+      var oldEncoding = this.encoding();
+      this.encoding('binary');
+      this.data.writeUInt8(num, 0);
+      this.encoding(oldEncoding);
+      return num;
+    }
     return this.as('binary').readUInt8(0);
   };
 
   // get or set the encoding used (transforms data)
   BitcoinAddress.prototype.encoding = function(encoding) {
-    if(encoding) {
+    if(encoding && (encoding != this._encoding)) {
       this.data = this.as(encoding);
       this.__proto__ = encodings[encoding];
     }