From faffe2e084d6fe5e7dda058e980c8fa8a3df2c64 Mon Sep 17 00:00:00 2001
From: Kris Nuttycombe <kris.nuttycombe@gmail.com>
Date: Fri, 4 Mar 2022 11:36:03 -0700
Subject: [PATCH] Assert we never attempt to checkpoint the Orchard wallet at a
 negative block height.

Co-authored-by: Daira Hopwood <daira@jacaranda.org>
---
 src/wallet/orchard.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/wallet/orchard.h b/src/wallet/orchard.h
index 5649255c5..8a9f8f6c0 100644
--- a/src/wallet/orchard.h
+++ b/src/wallet/orchard.h
@@ -82,6 +82,7 @@ public:
      * height scanned for transactions. This must be called exactly once per block.
      */
     bool CheckpointNoteCommitmentTree(int nBlockHeight) {
+        assert(nBlockHeight >= 0);
         return orchard_wallet_checkpoint(inner.get(), (uint32_t) nBlockHeight);
     }