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Hi, I need to use QR to be able to deliver free products. That is, to use for free drinks in bars. How can I use it?



Thank you!

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interesting question, but can you please specify your requirement a little better?
thanks

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Let's suppose I am programming a system for a nightclub. I want to give each customer who enters a ticket with a QR, so that when he reedems it we can scan it at the POS and give them a single free drink. In other words, I want to have a system that each night can generate QRs that are unique, have a single use and only function the night it is generated.

For example, if they give is one ticket, they have one DRINK free. But i need validate this QR in the POS.
https://media.istockphoto.com/vectors/happy-halloween-party-tickets-vector-id1038038182?k=20&m=1038038182&s=170667a&w=0&h=QDJFnU41r2fvE7Iylr-kzx4fv2enfht4OFxl7lGkE20=

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