// Copyright (c) 2020-2021 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 <script/script.h>

#include <test/fuzz/FuzzedDataProvider.h>

#include <test/fuzz/fuzz.h>

#include <test/fuzz/util.h>

#include <cstdint>

#include <string>

#include <vector>

FUZZ_TARGET(script_ops)

{

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

    CScript script_mut = ConsumeScript(fuzzed_data_provider);

    LIMITED_WHILE(fuzzed_data_provider.remaining_bytes() > 0, 1000000) {

        CallOneOf(

            fuzzed_data_provider,

            [&] {

                CScript s = ConsumeScript(fuzzed_data_provider);

                script_mut = std::move(s);

            },

            [&] {

                const CScript& s = ConsumeScript(fuzzed_data_provider);

                script_mut = s;

            },

            [&] {

                script_mut << fuzzed_data_provider.ConsumeIntegral<int64_t>();

            },

            [&] {

                script_mut << ConsumeOpcodeType(fuzzed_data_provider);

            },

            [&] {

                script_mut << ConsumeScriptNum(fuzzed_data_provider);

            },

            [&] {

                script_mut << ConsumeRandomLengthByteVector(fuzzed_data_provider);

            },

            [&] {

                script_mut.clear();

            });

    }

    const CScript& script = script_mut;

    (void)script.GetSigOpCount(false);

    (void)script.GetSigOpCount(true);

    (void)script.GetSigOpCount(script);

    (void)script.HasValidOps();

    (void)script.IsPayToScriptHash();

    (void)script.IsPayToWitnessScriptHash();

    (void)script.IsPushOnly();

    (void)script.IsUnspendable();

    {

        CScript::const_iterator pc = script.begin();

        opcodetype opcode;

        (void)script.GetOp(pc, opcode);

        std::vector<uint8_t> data;

        (void)script.GetOp(pc, opcode, data);

        (void)script.IsPushOnly(pc);

    }

    {

        int version;

        std::vector<uint8_t> program;

        (void)script.IsWitnessProgram(version, program);

    }

}