Before the existence of ERC721, tokens on blockchains were fungible, or interchangeable any one Bitcoin or Ethereum token is identical to any other. How do CryptoKitties work?ĬryptoKitties are non-fungible tokens, originally built on the Ethereum blockchain using the ERC721 token standard. $0.04707417 -1.93% Terra Classic (Wormhole)īut CryptoKitties has one key difference up its sleeve: each CryptoKitty is completely unique, represented on the blockchain by a non-fungible token (NFT).Ī pioneering example of the technology, it captured the imagination of the crypto community with a fun and tangible example of what you can create using distributed ledger technology.
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