// Copyright (c) 2009-2021 The Bitcoin Core developers

// Distributed under the MIT software license, see the accompanying

// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#include <pubkey.h>

#include <script/interpreter.h>

#include <test/fuzz/FuzzedDataProvider.h>

#include <test/fuzz/fuzz.h>

#include <limits>

FUZZ_TARGET(eval_script)

{

    FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());

    const unsigned int flags = fuzzed_data_provider.ConsumeIntegral<unsigned int>();

    const std::vector<uint8_t> script_bytes = [&] {

        if (fuzzed_data_provider.remaining_bytes() != 0) {

            return fuzzed_data_provider.ConsumeRemainingBytes<uint8_t>();

        } else {

            // Avoid UBSan warning:

            //   test/fuzz/FuzzedDataProvider.h:212:17: runtime error: null pointer passed as argument 1, which is declared to never be null

            //   /usr/include/string.h:43:28: note: nonnull attribute specified here

            return std::vector<uint8_t>();

        }

    }();

    const CScript script(script_bytes.begin(), script_bytes.end());

    for (const auto sig_version : {SigVersion::BASE, SigVersion::WITNESS_V0}) {

        std::vector<std::vector<unsigned char>> stack;

        (void)EvalScript(stack, script, flags, BaseSignatureChecker(), sig_version, nullptr);

    }

}