Bitcoin Core  22.99.0
P2P Digital Currency
block_header.cpp
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1 // Copyright (c) 2020 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 <primitives/block.h>
7 #include <test/fuzz/fuzz.h>
8 #include <test/fuzz/util.h>
9 #include <uint256.h>
10 
11 #include <cassert>
12 #include <cstdint>
13 #include <optional>
14 #include <string>
15 #include <vector>
16 
17 FUZZ_TARGET(block_header)
18 {
19  FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());
20  const std::optional<CBlockHeader> block_header = ConsumeDeserializable<CBlockHeader>(fuzzed_data_provider);
21  if (!block_header) {
22  return;
23  }
24  {
25  const uint256 hash = block_header->GetHash();
26  static const uint256 u256_max(uint256S("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"));
27  assert(hash != u256_max);
28  assert(block_header->GetBlockTime() == block_header->nTime);
29  assert(block_header->IsNull() == (block_header->nBits == 0));
30  }
31  {
32  CBlockHeader mut_block_header = *block_header;
33  mut_block_header.SetNull();
34  assert(mut_block_header.IsNull());
35  CBlock block{*block_header};
36  assert(block.GetBlockHeader().GetHash() == block_header->GetHash());
37  (void)block.ToString();
38  block.SetNull();
39  assert(block.GetBlockHeader().GetHash() == mut_block_header.GetHash());
40  }
41  {
42  std::optional<CBlockLocator> block_locator = ConsumeDeserializable<CBlockLocator>(fuzzed_data_provider);
43  if (block_locator) {
44  (void)block_locator->IsNull();
45  block_locator->SetNull();
46  assert(block_locator->IsNull());
47  }
48  }
49 }
block.h
assert
assert(!tx.IsCoinBase())
CBlockHeader::IsNull
bool IsNull() const
Definition: block.h:48
CBlockHeader
Nodes collect new transactions into a block, hash them into a hash tree, and scan through nonce value...
Definition: block.h:20
uint256.h
util.h
CBlockHeader::GetHash
uint256 GetHash() const
Definition: block.cpp:11
FUZZ_TARGET
FUZZ_TARGET(block_header)
Definition: block_header.cpp:17
FuzzedDataProvider.h
uint256
256-bit opaque blob.
Definition: uint256.h:124
uint256S
uint256 uint256S(const char *str)
Definition: uint256.h:137
CBlockHeader::SetNull
void SetNull()
Definition: block.h:38
CBlock
Definition: block.h:62
fuzz.h
FuzzedDataProvider
Definition: FuzzedDataProvider.h:31