transmit method

@override Future<Uint8List> transmit(Uint8List command)

Sends command and returns the response, data then status bytes.

Throws a CardTransportException when the card cannot be reached.

Implementation

@override
Future<Uint8List> transmit(Uint8List command) async {
  if (latency > Duration.zero) await Future<void>.delayed(latency);
  if (!_inserted) {
    throw const CardTransportException('No card in the simulated reader');
  }
  if (command.length < 4) return _status(0x6700);
  _loaded = await _files;
  if (!_inserted) {
    throw const CardTransportException('No card in the simulated reader');
  }

  final cla = command[0];
  final ins = command[1];
  final p2 = command[3];
  final data = command.length > 5
      ? Uint8List.sublistView(command, 5, 5 + command[4])
      : Uint8List(0);

  if (cla == 0x80 && ins == 0xE4) return _cardData(command, p2);
  if (cla != 0x00) return _status(0x6E00);
  return switch (ins) {
    0xA4 => _select(command[2], data),
    0xB0 => _readBinary(command),
    0x20 => _verify(data),
    0x24 => _changePin(command[2], command[3], data),
    0x88 => _internalAuthenticate(command[2], command[3], data),
    _ => _status(0x6D00),
  };
}