difference_formatter.cpp raw

   1  // Copyright (c) 2025-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 <blockencodings.h>
   6  #include <streams.h>
   7  #include <random.h>
   8  #include <test/fuzz/fuzz.h>
   9  
  10  #include <vector>
  11  
  12  FUZZ_TARGET(difference_formatter)
  13  {
  14      const auto block_hash = InsecureRandomContext{{}}.rand256();
  15      DataStream ss{};
  16      ss << block_hash << std::span{buffer};
  17  
  18      // Test deserialization
  19      try {
  20          BlockTransactionsRequest test_container;
  21          ss >> test_container;
  22          assert(test_container.blockhash == block_hash);
  23  
  24          // Invariant: strictly monotonic increasing (no duplicates allowed)
  25          for (size_t i = 1; i < test_container.indexes.size(); ++i) {
  26              assert(test_container.indexes[i] > test_container.indexes[i-1]);
  27          }
  28  
  29      } catch (const std::ios_base::failure&) {
  30          // Expected for malformed input
  31      }
  32  }
  33