Glossary

The mempool is the pool of pending, valid transactions that have been broadcast to a network…

A transaction is a signed instruction submitted to a blockchain that, once included in a block,…

A hash is a fixed-length fingerprint produced from any input by a one-way function; the same…

A block explorer is a website that lets anyone search and read blockchain data, including transactions,…

An externally owned account is an Ethereum account controlled by a private key, with no code,…

A smart contract is program code deployed on a blockchain that runs exactly as written when…

A nonce is a per-account counter of sent transactions on Ethereum, ordering them sequentially and preventing…

A gwei is one billion wei, or 0.000000001 ether; gas prices on Ethereum are commonly quoted…

Gas is the unit measuring computational work on Ethereum; you pay a gas fee for each…

setApprovalForAll is an ERC-721 and ERC-1155 function granting an operator permission to transfer every NFT you…