From ced35a07eb2790bdab7fa65c7242e17ea4426dd6 Mon Sep 17 00:00:00 2001
From: "Ryan X. Charles" <ryan@bitpay.com>
Date: Mon, 15 Sep 2014 18:38:21 -0700
Subject: [PATCH] Txout

---
 lib/txout.js  | 54 +++++++++++++++++++++++++++++++++++
 test/txout.js | 78 +++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 132 insertions(+)
 create mode 100644 lib/txout.js
 create mode 100644 test/txout.js

diff --git a/lib/txout.js b/lib/txout.js
new file mode 100644
index 000000000..9ccd082ba
--- /dev/null
+++ b/lib/txout.js
@@ -0,0 +1,54 @@
+var BN = require('./bn');
+var BufferReader = require('./bufferreader');
+var BufferWriter = require('./bufferwriter');
+var Varint = require('./varint');
+var Script = require('./script');
+
+var Txout = function Txout(valuebn, varint, script) {
+  if (!(this instanceof Txout))
+    return new Txout(valuebn, varint, script);
+  if (valuebn instanceof BN) {
+    this.set({
+      valuebn: valuebn,
+      varint: varint,
+      script: script
+    });
+  } else if (valuebn) {
+    var obj = valuebn;
+    this.set(obj);
+  }
+};
+
+Txout.prototype.set = function(obj) {
+  this.valuebn = obj.valuebn || this.valuebn;
+  this.varint = obj.varint || this.varint;
+  this.script = obj.script || this.script;
+  return this;
+};
+
+Txout.prototype.fromBuffer = function(buf) {
+  return this.fromBufferReader(BufferReader(buf));
+};
+
+Txout.prototype.fromBufferReader = function(br) {
+  this.valuebn = br.readUInt64LEBN();
+  this.varint = Varint(br.readVarintNum());
+  this.script = Script().fromBuffer(br.buffer(this.varint.toNumber()));
+  return this;
+};
+
+Txout.prototype.toBuffer = function() {
+  var bw = new BufferWriter();
+  return this.toBufferWriter(bw).concat();
+};
+
+Txout.prototype.toBufferWriter = function(bw) {
+  if (!bw)
+    bw = new BufferWriter();
+  bw.writeUInt64LEBN(this.valuebn);
+  bw.write(this.varint.buf);
+  bw.write(this.script.toBuffer());
+  return bw;
+};
+
+module.exports = Txout;
diff --git a/test/txout.js b/test/txout.js
new file mode 100644
index 000000000..cfc05fc24
--- /dev/null
+++ b/test/txout.js
@@ -0,0 +1,78 @@
+var should = require('chai').should();
+var BN = require('../lib/bn');
+var Txout = require('../lib/txout');
+var Script = require('../lib/script');
+var Varint = require('../lib/varint');
+var BufferReader = require('../lib/bufferreader');
+var BufferWriter = require('../lib/bufferwriter');
+
+describe('Txout', function() {
+  
+  it('should make a new txout', function() {
+    var txout = new Txout();
+    should.exist(txout);
+    txout = Txout();
+    should.exist(txout);
+  });
+
+  var valuebn = BN(5);
+  var script = Script().fromString("OP_CHECKMULTISIG");
+  var varint = Varint(script.toBuffer().length);
+  var txout = new Txout().set({
+    valuebn: valuebn,
+    varint: varint,
+    script: script
+  });
+
+  describe('#set', function() {
+    
+    it('should set this object', function() {
+      var txout = new Txout().set({
+        valuebn: valuebn,
+        varint: varint,
+        script: script
+      });
+      should.exist(txout.valuebn);
+      should.exist(txout.varint);
+      should.exist(txout.script);
+    });
+
+  });
+
+  describe('#fromBuffer', function() {
+    
+    it('should make this txin from this known buffer', function() {
+      var txout = Txout().fromBuffer(new Buffer('050000000000000001ae', 'hex'));
+      txout.toBuffer().toString('hex').should.equal('050000000000000001ae');
+    });
+
+  });
+
+  describe('#fromBufferReader', function() {
+    
+    it('should make this txin from this known buffer', function() {
+      var txout = Txout().fromBufferReader(BufferReader(new Buffer('050000000000000001ae', 'hex')));
+      txout.toBuffer().toString('hex').should.equal('050000000000000001ae');
+    });
+
+  });
+
+  describe('#toBuffer', function() {
+    
+    it('should output this known buffer', function() {
+      var txout = Txout().fromBufferReader(BufferReader(new Buffer('050000000000000001ae', 'hex')));
+      txout.toBuffer().toString('hex').should.equal('050000000000000001ae');
+    });
+
+  });
+
+  describe('#toBufferWriter', function() {
+    
+    it('should output this known buffer', function() {
+      var txout = Txout().fromBufferReader(BufferReader(new Buffer('050000000000000001ae', 'hex')));
+      txout.toBufferWriter().concat().toString('hex').should.equal('050000000000000001ae');
+    });
+
+  });
+
+});