From 18f06896953d96390d925060d6756a50ab3cd94b Mon Sep 17 00:00:00 2001
From: Duke <duke@hush.is>
Date: Mon, 12 Jun 2023 07:55:45 -0700
Subject: [PATCH] Avoid ztx validation during IBD if height is less than latest
 checkpoint

---
 src/main.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/main.cpp b/src/main.cpp
index 18769e520..a54d03ada 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1363,6 +1363,11 @@ bool ContextualCheckTransaction(int32_t slowflag,const CBlock *block, CBlockInde
                                 REJECT_INVALID, "bad-txns-invalid-script-data-for-coinbase-time-lock");
     }
 
+    // Avoid ztx validation during IBD if height is less than latest checkpoint
+    if (fCheckpointsEnabled && (nHeight < Checkpoints::GetTotalBlocksEstimate(Params().Checkpoints())) ) {
+        return true;
+    }
+
     if (!tx.vShieldedSpend.empty() ||
         !tx.vShieldedOutput.empty())
     {