i went to axie website. indeed they have a 'visible' main contract for their ERC721 and a 'hidden' contract for claiming rewards
adding @minh_trng as we were just discussing this earlier
https://forum.openzeppelin.com/t/games-that-implement-in-game-minting-cant-a-user-simply-mint-items-directly-from-explorer-page
axie website
claim reward contract (not verified)
do you know how to reverse compile this? curious how they handle rewards here