From d1527f6b88656ff4aab3c671c6d9780ea2ae986e Mon Sep 17 00:00:00 2001
From: Antoine Poinsot <darosior@protonmail.com>
Date: Wed, 19 Feb 2025 15:56:45 -0500
Subject: [PATCH] qa: correct off-by-one in utxo snapshot fuzz target

The chain starts at block 1, not genesis.
---
 src/kernel/chainparams.cpp      | 2 +-
 src/test/fuzz/utxo_snapshot.cpp | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/kernel/chainparams.cpp b/src/kernel/chainparams.cpp
index 349e14a5d6e..f3046e5ff11 100644
--- a/src/kernel/chainparams.cpp
+++ b/src/kernel/chainparams.cpp
@@ -623,7 +623,7 @@ public:
             {
                 // For use by fuzz target src/test/fuzz/utxo_snapshot.cpp
                 .height = 200,
-                .hash_serialized = AssumeutxoHash{uint256{"4f34d431c3e482f6b0d67b64609ece3964dc8d7976d02ac68dd7c9c1421738f2"}},
+                .hash_serialized = AssumeutxoHash{uint256{"7e3b7780fbd2fa479a01f66950dc8f728dc1b11f03d06d5bf223168520df3a48"}},
                 .m_chain_tx_count = 201,
                 .blockhash = consteval_ctor(uint256{"5e93653318f294fb5aa339d00bbf8cf1c3515488ad99412c37608b139ea63b27"}),
             },
diff --git a/src/test/fuzz/utxo_snapshot.cpp b/src/test/fuzz/utxo_snapshot.cpp
index 5eb6a323202..5a9df1e48a4 100644
--- a/src/test/fuzz/utxo_snapshot.cpp
+++ b/src/test/fuzz/utxo_snapshot.cpp
@@ -101,7 +101,7 @@ void utxo_snapshot_fuzz(FuzzBufferType buffer)
             std::vector<uint8_t> file_data{ConsumeRandomLengthByteVector(fuzzed_data_provider)};
             outfile << Span{file_data};
         } else {
-            int height{0};
+            int height{1};
             for (const auto& block : *g_chain) {
                 auto coinbase{block->vtx.at(0)};
                 outfile << coinbase->GetHash();