Function keccak256

src/cli.cpp:22–32

Keccak-256 hash function implementation for hashsigs-cpp

// Keccak-256 hash function implementation for hashsigs-cpp
static std::array<uint8_t, 32> keccak256(const std::vector<uint8_t> &data) {
  Keccak keccak(Keccak::Keccak256);
  std::string hash = keccak(data.data(), data.size());

  std::array<uint8_t, 32> result;
  for (size_t i = 0; i < 32; ++i) {
    std::string byte_str = hash.substr(i * 2, 2);
    result[i] = static_cast<uint8_t>(std::stoi(byte_str, nullptr, 16));
  }
  return result;
}

// Helper: parse a hex string into a PublicKey (array<uint8_t, 32>)
static PublicKey parsePublicKeyFromHex(const std::string &hex) {