verifyArchethicKey function

bool verifyArchethicKey(String key)

Implementation

bool verifyArchethicKey(String key) {
  if (!isHex(key)) {
    return false;
  }

  // Convert the hexadecimal public key to a byte list
  final pubKeyBytes = hexToUint8List(key);

  // Check that the total length of the public key is sufficient to contain curve and origin information
  if (pubKeyBytes.length < 2) {
    return false;
  }

  final pubKeyBuf = pubKeyBytes.sublist(2, pubKeyBytes.length);

  // Determine the expected length of the public key based on the curve
  int lengthBytes;
  switch (pubKeyBytes[0]) {
    case 0:
      lengthBytes = 32;
      break;
    case 1:
    case 2:
      lengthBytes = 65;
      break;
    case 3:
      lengthBytes = 48;
      break;
    default:
      lengthBytes = -1;
  }

  // Check that the length of the public key matches the expected length
  if (lengthBytes == -1 || pubKeyBuf.lengthInBytes != lengthBytes) {
    return false;
  }

  // Check that the origin is either 0 or 1
  if (pubKeyBytes[1] != 0 && pubKeyBytes[1] != 1) {
    return false;
  }

  // If all checks pass, the public key is valid
  return true;
}