public async Task <ActionResult> PaynowNotification([FromBody] PaynowNotificationRequest dto)
{
if (Request.Headers.ContainsKey("Signature"))
{
var signatureHeader = Request.Headers["Signature"];
await _paymentService.ProcessPaynowNotification(dto, signatureHeader);
return(Accepted());
}
return(BadRequest());
}
public async Task <bool> ProcessPaynowNotification(PaynowNotificationRequest dto, string signature)
{
// validate signature header
string serializedData = JsonSerializer.Serialize(dto);
string calculatedSignature = CalculatePaynowSignature(serializedData);
if (!String.Equals(signature, calculatedSignature))
{
throw new AppException("Calculated signature is not matching header signature");
}
var payment = await _unitOfWork.Payments.Get(Guid.Parse(dto.ExternalId));
if (payment is null)
{
throw new KeyNotFoundException("Payment not found.");
}
// convert string to Status enum type
Status parsedStatus = (Status)Enum.Parse(typeof(Status), dto.Status, true);
// update payment status
if (ShouldStatusBeUpdated(payment.Status, parsedStatus))
{
payment.Status = parsedStatus;
payment.Updated = DateTime.UtcNow;
// if payment is confirmed update quote status
if (payment.Status == Status.Confirmed)
{
await _quoteService.UpdateQuoteStatus(payment.QuoteId, Status.Paid);
}
_unitOfWork.Commit();
return(true);
}
return(false);
}
