Hey guys can some one place help me with a worry I have.



If I want to give gift to my users because they own my nft but I want that only one gift can be given for each nft. That is once a gift has been claimed for an nft, that nft can no longer be used to claim that gift.

I know that I have to be able to keep track of each of the nft that was used to claim the reward

How can I go about coding this.

Thanks.