From baf6a24d23f7f4378d0f679d9e0f42210e4ae24e Mon Sep 17 00:00:00 2001
From: Esteban Ordano <eordano@gmail.com>
Date: Tue, 9 Dec 2014 11:04:31 -0300
Subject: [PATCH] Add ".publicKey" property to PrivateKey

---
 lib/privatekey.js  | 10 ++++++++++
 test/privatekey.js |  7 +++++++
 2 files changed, 17 insertions(+)

diff --git a/lib/privatekey.js b/lib/privatekey.js
index d5333d7..337216c 100644
--- a/lib/privatekey.js
+++ b/lib/privatekey.js
@@ -82,6 +82,16 @@ var PrivateKey = function PrivateKey(data, network, compressed) {
     value: info.network
   });
 
+  Object.defineProperty(this, 'publicKey', {
+    configurable: false,
+    get: function() {
+      if (!info.publicKey) {
+        info.publicKey = this.toPublicKey();
+      }
+      return info.publicKey;
+    }
+  });
+
   return this;
 
 };
diff --git a/test/privatekey.js b/test/privatekey.js
index f523345..c1d878a 100644
--- a/test/privatekey.js
+++ b/test/privatekey.js
@@ -261,6 +261,13 @@ describe('PrivateKey', function() {
       pubkey.toString().should.equal(pubhex);
     });
 
+    it('should have a "publicKey" property', function() {
+      var privhex = '906977a061af29276e40bf377042ffbde414e496ae2260bbf1fa9d085637bfff';
+      var pubhex = '02a1633cafcc01ebfb6d78e39f687a1f0995c62fc95f51ead10a02ee0be551b5dc';
+      var privkey = new PrivateKey(BN(new Buffer(privhex, 'hex')));
+      privkey.publicKey.toString().should.equal(pubhex);
+    });
+
     it('should convert this known PrivateKey to known PublicKey and preserve compressed=true', function() {
       var privhex = '906977a061af29276e40bf377042ffbde414e496ae2260bbf1fa9d085637bfff';
       var privkey = new PrivateKey(BN(new Buffer(privhex, 'hex')), 'livenet', true);