1  // Copyright (c) 2019-2021 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 <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      DataStream ds{buffer};
28      CBlock block;
29      try {
30          ds >> TX_WITH_WITNESS(block);
31      } catch (const std::ios_base::failure&) {
32          return;
33      }
34      const Consensus::Params& consensus_params = Params().GetConsensus();
35      BlockValidationState validation_state_pow_and_merkle;
36      const bool valid_incl_pow_and_merkle = CheckBlock(block, validation_state_pow_and_merkle, consensus_params, /* fCheckPOW= */ true, /* fCheckMerkleRoot= */ true);
37      assert(validation_state_pow_and_merkle.IsValid() || validation_state_pow_and_merkle.IsInvalid() || validation_state_pow_and_merkle.IsError());
38      (void)validation_state_pow_and_merkle.Error("");
39      BlockValidationState validation_state_pow;
40      const bool valid_incl_pow = CheckBlock(block, validation_state_pow, consensus_params, /* fCheckPOW= */ true, /* fCheckMerkleRoot= */ false);
41      assert(validation_state_pow.IsValid() || validation_state_pow.IsInvalid() || validation_state_pow.IsError());
42      BlockValidationState validation_state_merkle;
43      const bool valid_incl_merkle = CheckBlock(block, validation_state_merkle, consensus_params, /* fCheckPOW= */ false, /* fCheckMerkleRoot= */ true);
44      assert(validation_state_merkle.IsValid() || validation_state_merkle.IsInvalid() || validation_state_merkle.IsError());
45      BlockValidationState validation_state_none;
46      const bool valid_incl_none = CheckBlock(block, validation_state_none, consensus_params, /* fCheckPOW= */ false, /* fCheckMerkleRoot= */ false);
47      assert(validation_state_none.IsValid() || validation_state_none.IsInvalid() || validation_state_none.IsError());
48      if (valid_incl_pow_and_merkle) {
49          assert(valid_incl_pow && valid_incl_merkle && valid_incl_none);
50      } else if (valid_incl_merkle || valid_incl_pow) {
51          assert(valid_incl_none);
52      }
53      (void)block.GetHash();
54      (void)block.ToString();
55      (void)BlockMerkleRoot(block);
56      if (!block.vtx.empty()) {
57          (void)BlockWitnessMerkleRoot(block);
58      }
59      (void)GetBlockWeight(block);
60      (void)GetWitnessCommitmentIndex(block);
61      const size_t raw_memory_size = RecursiveDynamicUsage(block);
62      const size_t raw_memory_size_as_shared_ptr = RecursiveDynamicUsage(std::make_shared<CBlock>(block));
63      assert(raw_memory_size_as_shared_ptr > raw_memory_size);
64      CBlock block_copy = block;
65      block_copy.SetNull();
66      const bool is_null = block_copy.IsNull();
67      assert(is_null);
68  }