1  // Copyright (c) 2019-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 <chainparams.h>
 6  #include <consensus/merkle.h>
 7  #include <consensus/validation.h>
 8  #include <core_io.h>
 9  #include <core_memusage.h>
10  #include <primitives/block.h>
11  #include <pubkey.h>
12  #include <streams.h>
13  #include <test/fuzz/fuzz.h>
14  #include <util/chaintype.h>
15  #include <validation.h>
16  
17  #include <cassert>
18  #include <string>
19  
20  void initialize_block()
21  {
22      SelectParams(ChainType::REGTEST);
23  }
24  
25  FUZZ_TARGET(block, .init = initialize_block)
26  {
27      CBlock block;
28      try {
29          SpanReader{buffer} >> TX_WITH_WITNESS(block);
30      } catch (const std::ios_base::failure&) {
31          return;
32      }
33      const Consensus::Params& consensus_params = Params().GetConsensus();
34      BlockValidationState validation_state_pow_and_merkle;
35      const bool valid_incl_pow_and_merkle = CheckBlock(block, validation_state_pow_and_merkle, consensus_params, /* fCheckPOW= */ true, /* fCheckMerkleRoot= */ true);
36      assert(validation_state_pow_and_merkle.IsValid() || validation_state_pow_and_merkle.IsInvalid() || validation_state_pow_and_merkle.IsError());
37      (void)validation_state_pow_and_merkle.Error("");
38      BlockValidationState validation_state_pow;
39      const bool valid_incl_pow = CheckBlock(block, validation_state_pow, consensus_params, /* fCheckPOW= */ true, /* fCheckMerkleRoot= */ false);
40      assert(validation_state_pow.IsValid() || validation_state_pow.IsInvalid() || validation_state_pow.IsError());
41      BlockValidationState validation_state_merkle;
42      const bool valid_incl_merkle = CheckBlock(block, validation_state_merkle, consensus_params, /* fCheckPOW= */ false, /* fCheckMerkleRoot= */ true);
43      assert(validation_state_merkle.IsValid() || validation_state_merkle.IsInvalid() || validation_state_merkle.IsError());
44      BlockValidationState validation_state_none;
45      const bool valid_incl_none = CheckBlock(block, validation_state_none, consensus_params, /* fCheckPOW= */ false, /* fCheckMerkleRoot= */ false);
46      assert(validation_state_none.IsValid() || validation_state_none.IsInvalid() || validation_state_none.IsError());
47      if (valid_incl_pow_and_merkle) {
48          assert(valid_incl_pow && valid_incl_merkle && valid_incl_none);
49      } else if (valid_incl_merkle || valid_incl_pow) {
50          assert(valid_incl_none);
51      }
52      (void)block.GetHash();
53      (void)block.ToString();
54      (void)BlockMerkleRoot(block);
55      if (!block.vtx.empty()) {
56          (void)BlockWitnessMerkleRoot(block);
57      }
58      (void)GetBlockWeight(block);
59      (void)GetWitnessCommitmentIndex(block);
60      const size_t raw_memory_size = RecursiveDynamicUsage(block);
61      const size_t raw_memory_size_as_shared_ptr = RecursiveDynamicUsage(std::make_shared<CBlock>(block));
62      assert(raw_memory_size_as_shared_ptr > raw_memory_size);
63      CBlock block_copy = block;
64      block_copy.SetNull();
65      const bool is_null = block_copy.IsNull();
66      assert(is_null);
67  }