1  // Copyright (c) 2020-2021 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 <merkleblock.h>
 6  #include <policy/fees.h>
 7  #include <rpc/util.h>
 8  #include <test/fuzz/FuzzedDataProvider.h>
 9  #include <test/fuzz/fuzz.h>
10  #include <test/fuzz/util.h>
11  #include <util/error.h>
12  #include <util/translation.h>
13  
14  #include <array>
15  #include <cstdint>
16  #include <optional>
17  #include <vector>
18  
19  namespace {
20  constexpr TransactionError ALL_TRANSACTION_ERROR[] = {
21      TransactionError::OK,
22      TransactionError::MISSING_INPUTS,
23      TransactionError::ALREADY_IN_CHAIN,
24      TransactionError::P2P_DISABLED,
25      TransactionError::MEMPOOL_REJECTED,
26      TransactionError::MEMPOOL_ERROR,
27      TransactionError::INVALID_PSBT,
28      TransactionError::PSBT_MISMATCH,
29      TransactionError::SIGHASH_MISMATCH,
30      TransactionError::MAX_FEE_EXCEEDED,
31  };
32  }; // namespace
33  
34  // The fuzzing kitchen sink: Fuzzing harness for functions that need to be
35  // fuzzed but a.) don't belong in any existing fuzzing harness file, and
36  // b.) are not important enough to warrant their own fuzzing harness file.
37  FUZZ_TARGET(kitchen_sink)
38  {
39      FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());
40  
41      const TransactionError transaction_error = fuzzed_data_provider.PickValueInArray(ALL_TRANSACTION_ERROR);
42      (void)JSONRPCTransactionError(transaction_error);
43      (void)RPCErrorFromTransactionError(transaction_error);
44      (void)TransactionErrorString(transaction_error);
45  
46      (void)StringForFeeEstimateHorizon(fuzzed_data_provider.PickValueInArray(ALL_FEE_ESTIMATE_HORIZONS));
47  
48      const OutputType output_type = fuzzed_data_provider.PickValueInArray(OUTPUT_TYPES);
49      const std::string& output_type_string = FormatOutputType(output_type);
50      const std::optional<OutputType> parsed = ParseOutputType(output_type_string);
51      assert(parsed);
52      assert(output_type == parsed.value());
53      (void)ParseOutputType(fuzzed_data_provider.ConsumeRandomLengthString(64));
54  
55      const std::vector<uint8_t> bytes = ConsumeRandomLengthByteVector(fuzzed_data_provider);
56      const std::vector<bool> bits = BytesToBits(bytes);
57      const std::vector<uint8_t> bytes_decoded = BitsToBytes(bits);
58      assert(bytes == bytes_decoded);
59  }