From ff8e2fc2e2416f6f3b84cdb40db8ac168596b579 Mon Sep 17 00:00:00 2001
From: brunoerg <brunoely.gc@gmail.com>
Date: Sat, 30 Sep 2023 11:53:39 -0300
Subject: [PATCH] fuzz: add coverage for
 `bitcoinconsensus_verify_script_with_spent_outputs`

Co-authored-by: Antonie Poinsot <darosior@protonmail.com>
---
 src/test/fuzz/script_bitcoin_consensus.cpp | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/src/test/fuzz/script_bitcoin_consensus.cpp b/src/test/fuzz/script_bitcoin_consensus.cpp
index fcd66b234e..846389863d 100644
--- a/src/test/fuzz/script_bitcoin_consensus.cpp
+++ b/src/test/fuzz/script_bitcoin_consensus.cpp
@@ -28,4 +28,23 @@ FUZZ_TARGET(script_bitcoin_consensus)
     }
     (void)bitcoinconsensus_verify_script(random_bytes_1.data(), random_bytes_1.size(), random_bytes_2.data(), random_bytes_2.size(), n_in, flags, err_p);
     (void)bitcoinconsensus_verify_script_with_amount(random_bytes_1.data(), random_bytes_1.size(), money, random_bytes_2.data(), random_bytes_2.size(), n_in, flags, err_p);
+
+    std::vector<UTXO> spent_outputs;
+    std::vector<std::vector<unsigned char>> spent_spks;
+    if (n_in <= 24386) {
+        spent_outputs.reserve(n_in);
+        spent_spks.reserve(n_in);
+        for (size_t i = 0; i < n_in; ++i) {
+            spent_spks.push_back(ConsumeRandomLengthByteVector(fuzzed_data_provider));
+            const CAmount value{ConsumeMoney(fuzzed_data_provider)};
+            const auto spk_size{static_cast<unsigned>(spent_spks.back().size())};
+            spent_outputs.push_back({.scriptPubKey = spent_spks.back().data(), .scriptPubKeySize = spk_size, .value = value});
+        }
+    }
+
+    const auto spent_outs_size{static_cast<unsigned>(spent_outputs.size())};
+
+    (void)bitcoinconsensus_verify_script_with_spent_outputs(
+            random_bytes_1.data(), random_bytes_1.size(), money, random_bytes_2.data(), random_bytes_2.size(),
+            spent_outputs.data(), spent_outs_size, n_in, flags, err_p);
 }