From 4672f607e5c30e31bcdd5d2224e26ec868eeac34 Mon Sep 17 00:00:00 2001
From: JahPowerBit <lightzarlboro@gmail.com>
Date: Sat, 3 Jan 2015 11:57:36 +0000
Subject: [PATCH] fix scriptpubkey_to_canonical_address

---
 lib/blockchain.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/blockchain.py b/lib/blockchain.py
index 579e17a1..b58d364c 100644
--- a/lib/blockchain.py
+++ b/lib/blockchain.py
@@ -352,8 +352,10 @@ def scriptpubkey_to_canonical_address(scriptpubkey):
         signatures_required = asm[0]
         signatures_possible = len(asm) - 3
         return "_".join([str(signatures_required)] + sorted(scriptpubkey['addresses']) + [str(signatures_possible)])
-    else:
+    elif 'addresses' in scriptpubkey:
         return scriptpubkey['addresses'][0]
+    else:
+        return None
 
 
 def get_unspent_txouts(source, return_confirmed=False):