From 28abd09845d6d20e720a39123204ce17c28b4e75 Mon Sep 17 00:00:00 2001
From: Christopher Jeffrey <chjjeffrey@gmail.com>
Date: Fri, 6 Jun 2014 03:10:21 -0500
Subject: [PATCH] wallet: allow inputs and offset to be passed into
 wallet.sign.

---
 lib/bcoin/wallet.js | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/lib/bcoin/wallet.js b/lib/bcoin/wallet.js
index 6051fdc1..cd4106c3 100644
--- a/lib/bcoin/wallet.js
+++ b/lib/bcoin/wallet.js
@@ -207,13 +207,16 @@ Wallet.prototype.ownInput = function ownInput(tx, index) {
   return inputs;
 };
 
-Wallet.prototype.sign = function sign(tx, type) {
+Wallet.prototype.sign = function sign(tx, type, inputs, off) {
   if (!type)
     type = 'all';
   assert.equal(type, 'all');
 
+  if (!off)
+    off = 0;
+
   // Filter inputs that this wallet own
-  var inputs = tx.inputs.filter(function(input) {
+  var inputs = inputs || tx.inputs.filter(function(input) {
     return input.out.tx && this.ownOutput(input.out.tx);
   }, this);
   var pub = this.getPublicKey();
@@ -221,7 +224,7 @@ Wallet.prototype.sign = function sign(tx, type) {
   // Add signature script to each input
   inputs.forEach(function(input, i) {
     var s = input.out.tx.getSubscript(input.out.index);
-    var hash = tx.subscriptHash(i, s, type);
+    var hash = tx.subscriptHash(off + i, s, type);
     var signature = bcoin.ecdsa.sign(hash, this.key).toDER();
     signature = signature.concat(bcoin.protocol.constants.hashType[type]);