Scan QR codes with verification

Hi!
I’m making an app that scans QR codes and there’s just one problem left to solve.

I need to scan QR codes and show a green tick if the code is scanned for the first time and a red X if it has been already scanned today.
In addition the scan records need to reset ever day so that the next day a green tick appears if scanned.

Appreciate any help!

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