
ERC721 enabled the development of non-fungible, one-of-a-kind tokens. Before the introduction of ERC721, blockchain tokens were fungible or interchangeable every Bitcoin or Ethereum token is identical to any other. Users have already purchased almost USD 1 million worth of virtual pets just a few days after the introduction.ĬryptoKitties are Non-Fungible Tokens (NFTs) created using the ERC721 token standard on the Ethereum network.

Each cat manufactured is one-of-a-kind, with various colored fur, eyes, and hair!ĭifferent CryptoKitty genders are also available, each named after a male or female horse! For example, a male CryptoKitty is known as a Sire, while females are known as Dames!Īlthough CryptoKitties is referred to as a game, you can only buy, breed, and sell them. The creators attempted to make an Ethereum game that allowed anybody on the globe to own virtual cats produced by smart contracts.
