getUniqueSaleNumber method

Future<String> getUniqueSaleNumber()

Implementation

Future<String> getUniqueSaleNumber() async {
  final uniqueSaleNumber = await readWriteParameter(
    name: Parameters.UNP.name,
  );

  if (uniqueSaleNumber == null || uniqueSaleNumber.isEmpty) {
    throw FiscalCodeException('Unique sale number is empty or not set', 0);
  }
  return uniqueSaleNumber;
}