public extended keys tests passing

lib/hdkey.js

@@ -67,6 +67,38 @@ Object.defineProperty(HDKey.prototype, 'private', {
   }
 })
 
+Object.defineProperty(HDKey.prototype, 'public', {
+  get: function() {
+    // Version
+    var version = VERSIONS.public
+    var buffer = new Buffer(LEN)
+
+    // 4 bytes: version bytes
+    buffer.writeUInt32BE(version, 0)
+
+    // Depth
+    // 1 byte: depth: 0x00 for master nodes, 0x01 for level-1 descendants, ....
+    buffer.writeUInt8(this.depth, 4)
+
+    // 4 bytes: the fingerprint of the parent's key (0x00000000 if master key)
+    var fingerprint = this.depth ? this.parentFingerprint : 0x00000000
+    buffer.writeUInt32BE(fingerprint, 5)
+
+    // 4 bytes: child number. This is the number i in xi = xpar/i, with xi the key being serialized.
+    // This is encoded in Big endian. (0x00000000 if master key)
+    buffer.writeUInt32BE(this.index, 9)
+
+    // 32 bytes: the chain code
+    this.chaincode.copy(buffer, 13)
+
+    // X9.62 encoding for public keys
+    var buf = new Buffer(this.pub.getEncoded(true))
+    buf.copy(buffer, 45)
+    
+    return buffer
+  }
+})
+
 HDKey.prototype.getIdentifier = function() {
   //just computing pubKeyHash here
   var buf = new Buffer(this.pub.getEncoded(true))

test/hdkey.test.js

@@ -19,7 +19,7 @@ describe('hdkey', function() {
       var childkey = hdkey.derive(f.path)
 
       EQ (encode(childkey.private), f.private)
-      //EQ (encode(childkey.public), f.public)
+      EQ (encode(childkey.public), f.public)
     })    
   })  
 })