1  // Copyright (c) 2020-present The Bitcoin Core developers
 2  // Distributed under the MIT software license, see the accompanying
 3  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 4  
 5  #include <common/messages.h>
 6  #include <consensus/amount.h>
 7  #include <policy/fees/block_policy_estimator.h>
 8  #include <test/fuzz/FuzzedDataProvider.h>
 9  #include <test/fuzz/fuzz.h>
10  #include <test/fuzz/util.h>
11  
12  #include <cstdint>
13  #include <string>
14  #include <vector>
15  
16  using common::StringForFeeReason;
17  
18  FUZZ_TARGET(fees)
19  {
20      FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());
21      const CFeeRate minimal_incremental_fee{ConsumeMoney(fuzzed_data_provider)};
22      FastRandomContext rng{/*fDeterministic=*/true};
23      FeeFilterRounder fee_filter_rounder{minimal_incremental_fee, rng};
24      LIMITED_WHILE(fuzzed_data_provider.ConsumeBool(), 10000) {
25          const CAmount current_minimum_fee = ConsumeMoney(fuzzed_data_provider);
26          const CAmount rounded_fee = fee_filter_rounder.round(current_minimum_fee);
27          assert(MoneyRange(rounded_fee));
28      }
29      const FeeReason fee_reason = fuzzed_data_provider.PickValueInArray({FeeReason::NONE, FeeReason::HALF_ESTIMATE, FeeReason::FULL_ESTIMATE, FeeReason::DOUBLE_ESTIMATE, FeeReason::CONSERVATIVE, FeeReason::MEMPOOL_MIN, FeeReason::FALLBACK, FeeReason::REQUIRED});
30      (void)StringForFeeReason(fee_reason);
31  }