🐹POP

1.POP：Proof Of Play， POP is an open source NFT protocol based on erc-721.

2.POP aims to create a reliable new way to record game experience. As long as players participate in a game and complete certain campaigns, they will receive a unique badge on the blockchain as a souvenir.

3.POP modified erc-721 so that it will always follow the player's address from casting, and can not be traded and transferred.