From 14dd5ea407f512f3951b4834042b6111e10888aa Mon Sep 17 00:00:00 2001
From: Jeff Garzik <jgarzik@bitpay.com>
Date: Fri, 16 Aug 2013 22:22:50 -0400
Subject: [PATCH] Broken SIN stuff

---
 SIN.js      | 59 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 SINKey.js   | 39 +++++++++++++++++++++++++++++++++++
 sin-test.js |  7 +++++++
 3 files changed, 105 insertions(+)
 create mode 100644 SIN.js
 create mode 100644 SINKey.js
 create mode 100644 sin-test.js

diff --git a/SIN.js b/SIN.js
new file mode 100644
index 000000000..8d02906a1
--- /dev/null
+++ b/SIN.js
@@ -0,0 +1,59 @@
+require('classtool');
+
+function ClassSpec(b) {
+  var superclass = b.superclass || require('./util/VersionedData').class();
+
+  var SIN_PERSIST_MAINNET = 0x01;	// associated with sacrifice TX
+  var SIN_PERSIST_TESTNET = 0x11;	// associated with sacrifice TX
+  var SIN_EPHEM = 0x02;			// generate off-net at any time
+
+  function SIN(type, payload) {
+    if (typeof type != 'number') {
+      SIN.super(this, arguments);
+      return;
+    };
+    this.data = new Buffer(1 + 1 + payload.length);
+    this.__proto__ = this.encodings['binary'];
+    this.prefix(0x18);		// SIN magic number, in numberspace
+    this.type(type);
+    this.payload(payload);
+  };
+  SIN.superclass = superclass;
+  superclass.applyEncodingsTo(SIN);
+
+  // get or set the prefix data (the first byte of the address)
+  SIN.prototype.prefix = function(num) {
+    if(num || (num === 0)) {
+      this.doAsBinary(function() {this.data.writeUInt8(num, 0);});
+      return num;
+    }
+    return this.as('binary').readUInt8(0);
+  };
+
+  // get or set the SIN-type data (the second byte of the address)
+  SIN.prototype.type = function(num) {
+    if(num || (num === 0)) {
+      this.doAsBinary(function() {this.data.writeUInt8(num, 1);});
+      return num;
+    }
+    return this.as('binary').readUInt8(1);
+  };
+
+  // get or set the payload data (as a Buffer object)
+  SIN.prototype.payload = function(data) {
+    if(data) {
+      this.doAsBinary(function() {data.copy(this.data, 2);});
+      return data;
+    }
+    return this.as('binary').slice(1);
+  };
+
+  SIN.prototype.validate = function() {
+    this.doAsBinary(function() {
+      SIN.super(this, 'validate', arguments);
+      if (this.data.length != 22) throw new Error('invalid data length');
+    });
+  };
+  return SIN;
+};
+module.defineClass(ClassSpec);
diff --git a/SINKey.js b/SINKey.js
new file mode 100644
index 000000000..54bc54a97
--- /dev/null
+++ b/SINKey.js
@@ -0,0 +1,39 @@
+require('classtool');
+
+function ClassSpec(b) {
+	var coinUtil = require('./util/util');
+	var timeUtil = require('./util/time');
+	var KeyModule = require('./Key');
+	var SIN = require('./SIN').class();
+
+	function SINKey(cfg) {
+		if (typeof cfg != 'object')
+			cfg = {};
+
+		this.created = cfg.created;
+		this.privKey = cfg.privKey;
+	};
+
+	SINKey.prototype.generate = function() {
+		this.privKey = KeyModule.Key.generateSync();
+		this.created = timeUtil.curtime();
+	};
+
+	SINKey.prototype.storeObj = function() {
+		var pubKey = this.privKey.public.toString('hex');
+		var pubKeyHash = coinUtil.sha256ripe160(this.privKey.public);
+		var sin = new SIN(SIN.SIN_EPHEM, pubKeyHash);
+		var obj = {
+			created: this.created,
+			priv: this.privKey.private.toString('hex'),
+			pub: pubKey,
+			sin: sin.toString(),
+		};
+
+		return obj;
+	};
+
+	return SINKey;
+};
+module.defineClass(ClassSpec);
+
diff --git a/sin-test.js b/sin-test.js
new file mode 100644
index 000000000..df00923bf
--- /dev/null
+++ b/sin-test.js
@@ -0,0 +1,7 @@
+
+var SINKey = require('./SINKey').class();
+
+var sk = new SINKey();
+sk.generate();
+console.dir(sk.storeObj());
+