Thermal Printer replacement

The computers used at the point of sale would scan the items as normal The receipt would be generated as normal the items would be paid for as normal But when the receipt is to be printed on the thermal printer, we want the user to scan a barcode or some sort of identification. so the receipt is sent to a data base under the user's profile. The user signs in on the app and can see that receipt in real time meanwhile, a copy of the receipt is stored for the computer additionally, the device should be able to print the receipt if the customer also wants a paper receipt The app where the user signs in would be able to organize receipts by merchants and maybe by what the items on the receipts ar I only need the blueprints.