From ea0ee1b687a6a76075849e0c155480a1e87ae493 Mon Sep 17 00:00:00 2001
From: "Ryan X. Charles" <ryan@bitpay.com>
Date: Sun, 24 Aug 2014 14:26:17 -0700
Subject: [PATCH] add info on public key recovery

---
 lib/ecdsa.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/ecdsa.js b/lib/ecdsa.js
index 48117f1a2..6c90e162d 100644
--- a/lib/ecdsa.js
+++ b/lib/ecdsa.js
@@ -57,6 +57,9 @@ ECDSA.prototype.randomK = function() {
   return this;
 };
 
+// Information about public key recovery:
+// https://bitcointalk.org/index.php?topic=6430.0
+// http://stackoverflow.com/questions/19665491/how-do-i-get-an-ecdsa-public-key-from-just-a-bitcoin-signature-sec1-4-1-6-k
 ECDSA.prototype.sig2pubkey = function() {
   var i = this.sig.i;
   if (!(i === 0 || i === 1 || i === 2 || i === 3))