public async Task <string> Pay(Transaction transaction)
{
if (transaction == null)
{
throw new ArgumentNullException(nameof(transaction));
}
PaymentState paymentResult =
await _bankClientService.PostAsync(_transactionMapper.Map(transaction));
string paymentId = Guid.NewGuid().ToString();
TransactionResult result =
_transactionResultMapper.Map(paymentResult, transaction);
result.PaymentId = paymentId;
await _transactionResultRepository.InsertTransaction(result);
return(paymentId);
}
