public string Return(TpayNotification notification)
{
if (!IsNotificationValid(notification) || !IsTpayPaymentProcessorEnabled())
{
return(GenerateErrorResponse("Invalid request"));
}
var localOrderNumber = Convert.ToInt32(notification.tr_crc);
var order = orderService.GetOrderById(localOrderNumber);
if (IsSuccessfullTransaction(notification) &&
orderProcessingService.CanMarkOrderAsPaid(order))
{
orderProcessingService.MarkOrderAsPaid(order);
}
else
{
order.CaptureTransactionResult = notification.tr_error;
orderService.UpdateOrder(order);
}
return(TpayTransactionStatus.Success);
}
private static bool IsSuccessfullTransaction(TpayNotification notification)
{
return(notification.tr_status.Equals(TpayTransactionStatus.Success, StringComparison.OrdinalIgnoreCase) &&
!notification.tr_error.Equals(TpayTransactionStatus.Absent, StringComparison.OrdinalIgnoreCase));
}
private bool IsNotificationValid(TpayNotification notification) => availableIPsTable.Contains(Request.UserHostAddress) && notification.Md5Sum.Equals(GenerateCheckSum(notification), StringComparison.OrdinalIgnoreCase);
private string GenerateCheckSum(TpayNotification notification)
{
return(Md5HashManager.GetMd5Hash($"{tPayPaymentSettings.MerchantId}{notification.tr_id}{notification.tr_amount}{notification.tr_crc}{tPayPaymentSettings.MerchantSecret}"));
}