From 02c57b521a9e7afd4416cd027a8b397f202b08a8 Mon Sep 17 00:00:00 2001
From: Suhas Daftuar <sdaftuar@gmail.com>
Date: Fri, 3 Mar 2017 13:33:32 -0500
Subject: [PATCH] Optimize GetWitnessHash() for non-segwit transactions

---
 src/primitives/transaction.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/primitives/transaction.cpp b/src/primitives/transaction.cpp
index 790bc71d14b..28ef1fb4640 100644
--- a/src/primitives/transaction.cpp
+++ b/src/primitives/transaction.cpp
@@ -69,6 +69,9 @@ uint256 CTransaction::ComputeHash() const
 
 uint256 CTransaction::GetWitnessHash() const
 {
+    if (!HasWitness()) {
+        return GetHash();
+    }
     return SerializeHash(*this, SER_GETHASH, 0);
 }