From 89f249211a32f198dedacf4fdaac9e8a24426842 Mon Sep 17 00:00:00 2001
From: Jeremiah Buddenhagen <bitspill+git@bitspill.net>
Date: Thu, 25 Jan 2018 16:14:37 -0800
Subject: [PATCH] Sign transactions with v0.10.4 compatibility

---
 src/script/sign.cpp | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/script/sign.cpp b/src/script/sign.cpp
index dc50467d3..ef7099b2d 100644
--- a/src/script/sign.cpp
+++ b/src/script/sign.cpp
@@ -27,7 +27,13 @@ bool TransactionSignatureCreator::CreateSig(std::vector<unsigned char>& vchSig,
     if (sigversion == SIGVERSION_WITNESS_V0 && !key.IsCompressed())
         return false;
 
-    uint256 hash = SignatureHash(scriptCode, *txTo, nIn, nHashType, amount, sigversion);
+    int tempHashType = nHashType;
+    if (sigversion != SIGVERSION_WITNESS_V0) {
+        // Compatibility with v0.10.4 requires not signing the tx comment
+        // Once v0.10.4 is sufficiently fazed out this should be removed
+        tempHashType |= SIGHASH_OMIT_TX_COMMENT;
+    }
+    uint256 hash = SignatureHash(scriptCode, *txTo, nIn, tempHashType, amount, sigversion);
     if (!key.Sign(hash, vchSig))
         return false;
     vchSig.push_back((unsigned char)nHashType);