Function fromHex

include/common.hpp:65–86

}

inline vector<uint8_t> fromHex(const string &hex, size_t expected_length = 0) {
  string hex_str = hex;
  if (hex.substr(0, 2) == "0x") {
    hex_str = hex.substr(2);
  }

  if (expected_length > 0 && hex_str.length() != expected_length * 2) {
    throw runtime_error("Invalid hex string length: expected " +
                        std::to_string(expected_length) + " bytes, got " +
                        std::to_string(hex_str.length() / 2) + " bytes");
  }

  vector<uint8_t> result;
  result.reserve(hex_str.length() / 2);
  for (size_t i = 0; i < hex_str.length(); i += 2) {
    string byteString = hex_str.substr(i, 2);
    uint8_t byte =
        static_cast<uint8_t>(strtol(byteString.c_str(), nullptr, 16));
    result.push_back(byte);
  }
  return result;
}

inline array<uint8_t, 32> fromHex32(const string &hex) {
  vector<uint8_t> bytes = fromHex(hex, 32);