protected void btnOnlinePayment_Click(object sender, ImageClickEventArgs e)
{
try
{
string MerchantCode = Globals.GATEWAY_MERCHANTCODE;
string Currency = "UGX";
string ItemDesc = $"Payment For Sale [ {GenerateTransactionIDIfNotExists()} ]";
string CustomerRef = Session["CustID"] as string;
string Amount = GetItemTotal();
string Password = SharedCommons.GenearetHMACSha256Hash(Globals.GATEWAY_SECRET_KEY, Globals.GATEWAY_PASSWORD);
string ReturnUrl = Globals.RETURN_URL;
string VendorCode = Globals.GATEWAY_VENDORCODE;
string VendorTranId = GenerateTransactionIDIfNotExists();
string datatToSign = VendorCode + MerchantCode + Amount + ItemDesc + Currency + ReturnUrl + VendorTranId;
string DigitalSignature = SharedCommons.GenearetHMACSha256Hash(Globals.GATEWAY_SECRET_KEY, datatToSign);
string RequestData = "VENDORCODE=" + VendorCode + "&PASSWORD="******"&VENDOR_TRANID=" + VendorTranId + "&ITEM_TOTAL=" + Amount + "&ITEM_DESCRIPTION=" + ItemDesc + "&CURRENCY=" + Currency + "&RETURN_URL=" + ReturnUrl + "&DIGITAL_SIGNATURE=" + DigitalSignature + "&MERCHANTCODE=" + MerchantCode + "&CUSTOMER_REF=" + CustomerRef;
string URL = Globals.URL_FOR_PEGASUS_PAYMENTS_GATEWAY + "?" + RequestData;
Response.Redirect(URL);
}
catch (Exception ex)
{
//display error
ShowErrorMsg(SharedLogic.INTERNAL_ERROR_MSG);
//log error
SharedLogic.TcmpTestCore.LogError($"EXCEPTION:{ex.Message}", $"{this.GetType().Name}-{SharedLogic.GetCurrentMethod()}", "N/A");
}
}
public override bool IsValid()
{
string propertiesThatCanBeNull = $"{nameof(Id)}|{nameof(PaymentNarration)}";
string nullCheckResult = SharedCommons.CheckForNulls(this, propertiesThatCanBeNull);
if (nullCheckResult != SharedCommonsGlobals.SUCCESS_STATUS_TEXT)
{
StatusCode = SharedCommonsGlobals.FAILURE_STATUS_CODE;
StatusDesc = nullCheckResult;
return(false);
}
Payment duplicatePayment = Payment.QueryWithStoredProc("GetPaymentByPaymentSystemCodeAndID", PaymentId, PaymentSystemCode).FirstOrDefault();
if (duplicatePayment != null)
{
StatusCode = SharedCommonsGlobals.SUCCESS_STATUS_CODE;
StatusDesc = SharedCommonsGlobals.SUCCESS_STATUS_TEXT;
return(false);
}
PaymentSystem system = PaymentSystem.QueryWithStoredProc("GetPaymentSystemByID", PaymentSystemCode).FirstOrDefault();
if (system == null)
{
StatusCode = SharedCommonsGlobals.FAILURE_STATUS_CODE;
StatusDesc = "INVALID PAYMENT SYSTEM CODE OR PASSWORD";
return(false);
}
string hashedPassword = SharedCommons.GenearetHMACSha256Hash(system.SecretKey, Password);
if (hashedPassword != system.Password)
{
StatusCode = SharedCommonsGlobals.FAILURE_STATUS_CODE;
StatusDesc = "INVALID PAYMENT SYSTEM CODE OR PASSWORD";
return(false);
}
string dataToSign = PaymentSystemCode + Password + PaymentAmount + PaymentId + PaymentChannel + PayerContact + PayerName;
string hmacHash = SharedCommons.GenearetHMACSha256Hash(system.SecretKey, dataToSign);
if (DigitalSignature != hmacHash)
{
StatusCode = SharedCommonsGlobals.FAILURE_STATUS_CODE;
StatusDesc = "INVALID DIGITAL SIGNATURE";
return(false);
}
return(base.IsValid());
}
