Message.eot constructor
Creates an eot Message with Processig Code of 00 00 07.
Implementation
factory Message.eot({required String terminalId, DateTime? dateTime}) {
final x = Message('0300');
final now = dateTime ?? DateTime.now().toLocal();
x.processCode = 0x000007;
x.dateTime = now;
x.set(39, [0x17]);
x.terminalId = terminalId;
return x;
}