From 9dceacbde87394c92b2bb5b7ee3eda941dae5bef Mon Sep 17 00:00:00 2001
From: jl777 <jameslee777@yahoo.com>
Date: Sat, 15 Dec 2018 04:57:12 -1100
Subject: [PATCH] Allow sprout when overwinter

---
 src/main.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/main.cpp b/src/main.cpp
index 84abe0880..c3fc62233 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1079,7 +1079,9 @@ bool ContextualCheckTransaction(
     if (overwinterActive) {
         // Reject transactions intended for Sprout
         if (!tx.fOverwintered) {
-            return state.DoS(dosLevel, error("ContextualCheckTransaction: overwinter is active"),
+            int32_t ht = Params().GetConsensus().vUpgrades[Consensus::UPGRADE_OVERWINTER].nActivationHeight;
+            return state.DoS(
+                             return state.DoS((ht < 0 || nHeight < ht) ? 0 : dosLevel, error("ContextualCheckTransaction: overwinter is active"),
                              REJECT_INVALID, "tx-overwinter-active");
         }