From be78db1563f8a07c171d6ef666ea7f661374fecd Mon Sep 17 00:00:00 2001
From: Arthur Britto <ahbritto@gmail.com>
Date: Sat, 15 Jun 2013 22:26:18 -0700
Subject: [PATCH] Add optional cancel support to offer_create.

---
 src/js/ripple/transaction.js | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/js/ripple/transaction.js b/src/js/ripple/transaction.js
index 3d8a08a1..6b2531ff 100644
--- a/src/js/ripple/transaction.js
+++ b/src/js/ripple/transaction.js
@@ -588,8 +588,9 @@ Transaction.prototype.offer_cancel = function (src, sequence) {
 
 // Options:
 //  .set_flags()
-// --> expiration : Date or Number
-Transaction.prototype.offer_create = function (src, taker_pays, taker_gets, expiration) {
+// --> expiration : if not undefined, Date or Number
+// --> cancel_sequence : if not undefined, Sequence
+Transaction.prototype.offer_create = function (src, taker_pays, taker_gets, expiration, cancel_sequence) {
   this._secret                  = this._account_secret(src);
   this.tx_json.TransactionType  = 'OfferCreate';
   this.tx_json.Account          = UInt160.json_rewrite(src);
@@ -605,6 +606,9 @@ Transaction.prototype.offer_create = function (src, taker_pays, taker_gets, expi
                                     ? expiration.getTime()
                                     : Number(expiration);
 
+  if (cancel_sequence)
+    this.tx_json.OfferSequence    = Number(cancel_sequence);
+
   return this;
 };