About Implement a Plug-In for Processing Credit Card by Acuamtica Payments

Because when I add a LineItem, it will change the amount of the current SalesOrder, and it will prompt an error during Processing Payment. Acuamtica has too many internal amount checks and validations.

​@AndrewZ I’d not recommend to modify the actual payment amount. Instead insert a ‘Charge’ line in the payment. 

Adding a line to the order/invoice is not a correct approach, since the surcharge is not a property of the invoice, it’s a property of the payment. 

You can override the code in the ARPaymentAfterProcessingManager to do that. 

​@Dmitrii Naumov 

So, some bank or transaction fees are recorded in the Finance Charge instead of the Payment Amount, right?

This ARInvoice total is $100，total pay $101, $1 of it is for Gateway fees

​@AndrewZ something like that, yes. 

​@Dmitrii Naumov 

This is my test code, which overrides ARPaymentAfterProcessingManager. Is this correct? Do you have any better suggestions?

---UsrARPaymentEntryPaymentTransaction_Ext.class

 public class UsrARPaymentEntryPaymentTransaction_Ext : PXGraphExtension<ARPaymentEntryPaymentTransaction, ARPaymentEntry>

 {

     public static bool IsActive() => PXAccess.FeatureInstalled<PX.Objects.CS.FeaturesSet.integratedCardProcessing>();

     public delegate AfterProcessingManager GetAfterProcessingManagerDelegate();

     [PXOverride]

     public virtual AfterProcessingManager GetAfterProcessingManager(GetAfterProcessingManagerDelegate baseMethod)

     {

         return new UsrARPaymentAfterProcessingManager();

     }

 }

 ---UsrARPaymentAfterProcessingManager.class

public class UsrARPaymentAfterProcessingManager : ARPaymentAfterProcessingManager

 {

     [PXOverride]

     public override void PersistData()

     {

        //add data to CHARGE TAB

        base.PersistData();

     }

 }