write method

Implementation

Uint8List write() {
  BigInt value = val is BigInt ? val : BigInt.from(val);
  String buff = value.toRadixString(16);

  if (buff.length > 2 * bytelen) {
    throw Exception('Out of Bounds!');
  }

  buff = buff.padLeft(2 * bytelen, '0');
  Uint8List buffer = Uint8List.fromList(List<int>.generate(buff.length ~/ 2,
      (i) => int.parse(buff.substring(2 * i, 2 * i + 2), radix: 16)));

  // Remove leading zero bytes
  int wasteBytes = 0;
  for (int i = 0; i < buffer.length; i++) {
    if (buffer[i] == 0) {
      wasteBytes++;
    } else {
      break;
    }
  }

  return buffer.sublist(wasteBytes);
}