1. Widget call.
pw_widget.asp contains the script that builds the payment form (widget).
It requires the md5.asp library that is also attached.
2. Pingback processing.
pw_pingback.asp contains the script that will accept pingbacks (payment notifications) from Paymentwall and deliver the order. Please note that it has a placeholder like '// deliver order. goodsId parameter contains the ID of the order
where you still have to actually deliver the order.