From b54a63bf187d55c0679bb3acc527c458c34314aa Mon Sep 17 00:00:00 2001
From: Kris Nuttycombe <kris@nutty.land>
Date: Fri, 7 Jan 2022 19:59:12 -0700
Subject: [PATCH] Transaction builder must not set consensus branch ID for V4
 transactions.

---
 src/transaction_builder.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/transaction_builder.cpp b/src/transaction_builder.cpp
index d16c0c72e..50ed89110 100644
--- a/src/transaction_builder.cpp
+++ b/src/transaction_builder.cpp
@@ -522,6 +522,7 @@ void TransactionBuilder::CheckOrSetUsingSprout()
         auto txVersionInfo = CurrentTxVersionInfo(consensusParams, nHeight, usingSprout.value());
         mtx.nVersionGroupId = txVersionInfo.nVersionGroupId;
         mtx.nVersion        = txVersionInfo.nVersion;
+        mtx.nConsensusBranchId = std::nullopt;
     }
 }