In this post, I’d like to touch a little on the ERC-721 protocol standard, which is the basis for many “Non-Fungible Tokens” (NFTs) that we see on Ethereum and other blockchains. This will be a fairly technical post, and I’ll assume you’ve already read my previous post on the distributed ledger to better understand the groundwork for some of these ideas.FungibilityIn the last post, we talked about how tokens can carry value in these networks, such as Alice paying Bob 2.5 tokens. These tokens ...