OpenSeanft系统dapp开发制作

OpenSea is a marketplace for the decentralized web, including crypto collectibles, gaming items, and other items that are backed by the Ethereum blockchain. On OpenSea, you can buy or sell any of these items through an Ethereum smart contract, meaning that no central authority ever holds custody of your items.

Upland

PLAY – EARN – CONNECT IN UPLAND, the EARTH’S METAVERSE where you buy, sell, and trade virtual properties mapped to real-world addresses. Become a digital land owner, flip properties for profit, and run a virtual business to earn UPX coins. Join a new economy where you have the opportunity to make m…

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