Clover provide scan to pay in restaurants which allow user to scan the QR code in the bill and an interface gets open with price written on it and a function to add tip !! Is it possible if I could customize it according to my need like if I could create a customized workflow!! Like for example, if a user scan the QR on the bill for payment to my restaurants he might also get a option to add coupon codes with a section to add tips.... Is it possible to customize the workflow ?