If you’re interested in DeFi, you might have heard of the ERC-20 standard, which allows anyone to create a token compatible with the Ethereum blockchain. Those are “fungible” tokens. Most non-fungible tokens are built using the ERC-721 and ERC-1155 standards, which allow creators to issue unique cryptoassets via smart contract. Because each NFT is stored on a blockchain, there is an immutable record starting with the token’s creation and including every sale. (Some NFT-focused developers have also built their own alternative blockchains, including Dapper Lab’s Flow.)
