Walmart kiosk/scan to pay

Had an employee come and scan the QR code while I was checking out. From my understanding walmarts scan to pay will connect to the users phone for future features that can be used on mobile devices, including saving payment information. What are the liabilities that I should be concerned about in the instance the employee saved my payment information to their app when I paid with my card? Unless im completely lost, im probably going to contact the corporate offices and ensure I dont face any fraudulent charges pre-emptively, but wanted to ask beforehand. Thanks.