From fa5f987775407d5bdbfa1ad2fa98900a79c84903 Mon Sep 17 00:00:00 2001
From: Christopher Jeffrey <chjjeffrey@gmail.com>
Date: Sat, 13 May 2017 18:57:40 -0700
Subject: [PATCH] address: fix bech32 hrp check.

---
 lib/primitives/address.js | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/lib/primitives/address.js b/lib/primitives/address.js
index a1e0e84c..c29a44b2 100644
--- a/lib/primitives/address.js
+++ b/lib/primitives/address.js
@@ -245,20 +245,23 @@ Address.prototype.toBech32 = function toBech32(network) {
  */
 
 Address.prototype.fromString = function fromString(addr, network) {
-  var i, type, hrp;
+  var i, type, hrp, expect;
 
   assert(typeof addr === 'string');
+  assert(addr.length >= 2);
+
+  hrp = addr.substring(0, 2).toLowerCase();
 
   if (network) {
     network = Network.get(network);
-    hrp = network.addressPrefix.bech32;
-    if (util.startsWith(addr, hrp))
+    expect = network.addressPrefix.bech32;
+    if (hrp === expect)
       return this.fromBech32(addr, network);
   } else {
     for (i = 0; i < networks.types.length; i++) {
       type = networks.types[i];
-      hrp = networks[type].addressPrefix.bech32;
-      if (util.startsWith(addr, hrp))
+      expect = networks[type].addressPrefix.bech32;
+      if (hrp === expect)
         return this.fromBech32(addr, type);
     }
   }