fees.cpp

// Copyright (c) 2020-present 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 <common/messages.h>
#include <consensus/amount.h>
#include <policy/fees/block_policy_estimator.h>
#include <test/fuzz/FuzzedDataProvider.h>
#include <test/fuzz/fuzz.h>
#include <test/fuzz/util.h>
#include <util/fees.h>

#include <cstdint>
#include <string>
#include <vector>

using common::StringForFeeReason;

FUZZ_TARGET(fees)
{
    FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());
    const CFeeRate minimal_incremental_fee{ConsumeMoney(fuzzed_data_provider)};
    FastRandomContext rng{/*fDeterministic=*/true};
    FeeFilterRounder fee_filter_rounder{minimal_incremental_fee, rng};
    LIMITED_WHILE (fuzzed_data_provider.ConsumeBool(), 10000) {
        const CAmount current_minimum_fee = ConsumeMoney(fuzzed_data_provider);
        const CAmount rounded_fee = fee_filter_rounder.round(current_minimum_fee);
        assert(MoneyRange(rounded_fee));
    }
    const FeeReason fee_reason = fuzzed_data_provider.PickValueInArray({FeeReason::FEE_RATE_ESTIMATOR, FeeReason::MEMPOOL_MIN, FeeReason::USER_SPECIFIED, FeeReason::FALLBACK, FeeReason::REQUIRED});
    (void)StringForFeeReason(fee_reason);
    const BlockPolicyEstimateReason block_policy_fee_reason = fuzzed_data_provider.PickValueInArray({BlockPolicyEstimateReason::NONE, BlockPolicyEstimateReason::HALF_ESTIMATE, BlockPolicyEstimateReason::FULL_ESTIMATE, BlockPolicyEstimateReason::DOUBLE_ESTIMATE, BlockPolicyEstimateReason::CONSERVATIVE});
    (void)StringForBlockPolicyEstimateReason(block_policy_fee_reason);
    const FeeRateEstimatorType feerate_estimator_type = fuzzed_data_provider.PickValueInArray({FeeRateEstimatorType::AUTO, FeeRateEstimatorType::BLOCK_POLICY, FeeRateEstimatorType::MEMPOOL_POLICY});
    (void)FeeRateEstimatorTypeToString(feerate_estimator_type);
    (void)FeeRateEstimatorTypeFromString(fuzzed_data_provider.ConsumeRandomLengthString());
}