Add support for identities.

examples/identity.js

@@ -1,5 +1,7 @@
 var Identity = require('../lib/identity');
+var Keypair = require('../lib/keypair');
 
-var identity = new Identity( 0x02 );
+var keypair  = new Keypair();
+var identity = new Identity().fromPubkey( keypair.pubkey );
 
 console.log( identity.toString() );

lib/identity.js

@@ -58,7 +58,10 @@ Identity.prototype.fromHashbuf = function(hashbuf, networkstr, typestr) {
 };
 
 Identity.prototype.fromPubkey = function(pubkey, networkstr) {
-  this.hashbuf = Hash.sha256ripemd160(pubkey.toBuffer());
+  var p = new Buffer( 0x01 );
+  var b = pubkey.toBuffer();
+
+  this.hashbuf = Hash.sha256ripemd160( Buffer.concat([ p , b ]) );
   this.networkstr = networkstr || 'mainnet';
   this.typestr = 'identephem';
   return this;
@@ -88,9 +91,6 @@ Identity.prototype.isValid = function() {
 };
 
 Identity.prototype.toBuffer = function() {
-  
-  console.log(this.networkstr); process.exit();
-  
   version = new Buffer([constants[this.networkstr][this.typestr]]);
   var buf = Buffer.concat([version, this.hashbuf]);
   return buf;

lib/keypair.js

@@ -3,16 +3,22 @@ var Pubkey = require('./pubkey');
 var BN = require('./bn');
 var point = require('./point');
 
-var Keypair = function Keypair(obj) {
+var Keypair = function Keypair(obj) {  
   if (!(this instanceof Keypair))
     return new Keypair(obj);
+    
+  if (!obj) {
+    var privkey = Privkey().fromRandom();
+    var obj = this.fromPrivkey( privkey );
+  }
+
   if (obj)
     this.set(obj);
 };
 
 Keypair.prototype.set = function(obj) {
   this.privkey = obj.privkey || this.privkey || undefined;
-  this.pubkey = obj.pubkey || this.pubkey || undefined;
+  this.pubkey  = obj.pubkey  || this.pubkey  || undefined;
   return this;
 };