text: // Copyright (c) 2020 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 <bloom.h>
  #include <primitives/transaction.h>
  #include <test/fuzz/FuzzedDataProvider.h>
  #include <test/fuzz/fuzz.h>
  #include <test/fuzz/util.h>
  #include <uint256.h>
  
  #include <cassert>
  #include <cstdint>
  #include <optional>
  #include <string>
  #include <vector>
  
  FUZZ_TARGET(bloom_filter)
  {
      FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());
  
      CBloomFilter bloom_filter{
          fuzzed_data_provider.ConsumeIntegralInRange<unsigned int>(1, 10000000),
          1.0 / fuzzed_data_provider.ConsumeIntegralInRange<unsigned int>(1, std::numeric_limits<unsigned int>::max()),
          fuzzed_data_provider.ConsumeIntegral<unsigned int>(),
          static_cast<unsigned char>(fuzzed_data_provider.PickValueInArray({BLOOM_UPDATE_NONE, BLOOM_UPDATE_ALL, BLOOM_UPDATE_P2PUBKEY_ONLY, BLOOM_UPDATE_MASK}))};
      while (fuzzed_data_provider.remaining_bytes() > 0) {
          CallOneOf(
              fuzzed_data_provider,
              [&] {
                  const std::vector<unsigned char> b = ConsumeRandomLengthByteVector(fuzzed_data_provider);
                  (void)bloom_filter.contains(b);
                  bloom_filter.insert(b);
                  const bool present = bloom_filter.contains(b);
                  assert(present);
              },
              [&] {
                  const std::optional<COutPoint> out_point = ConsumeDeserializable<COutPoint>(fuzzed_data_provider);
                  if (!out_point) {
                      return;
                  }
                  (void)bloom_filter.contains(*out_point);
                  bloom_filter.insert(*out_point);
                  const bool present = bloom_filter.contains(*out_point);
                  assert(present);
              },
              [&] {
                  const std::optional<uint256> u256 = ConsumeDeserializable<uint256>(fuzzed_data_provider);
                  if (!u256) {
                      return;
                  }
                  (void)bloom_filter.contains(*u256);
                  bloom_filter.insert(*u256);
                  const bool present = bloom_filter.contains(*u256);
                  assert(present);
              },
              [&] {
                  const std::optional<CMutableTransaction> mut_tx = ConsumeDeserializable<CMutableTransaction>(fuzzed_data_provider);
                  if (!mut_tx) {
                      return;
                  }
                  const CTransaction tx{*mut_tx};
                  (void)bloom_filter.IsRelevantAndUpdate(tx);
              });
          (void)bloom_filter.IsWithinSizeConstraints();
      }
  }
  