what is gas?

the network fee paid to have a transaction processed on a blockchain.

approvals and revokes are transactions, so they cost gas. an off-chain signature costs nothing, so a free popup is not automatically a safe one.

related words

EVM chain ethereum and other blockchains that work the same way.
NFT a token that is unique rather than interchangeable, often used for digital art or collectibles.
smart contract a program that runs on a blockchain and moves tokens according to its code.

part of the topic whitepapers: free articles, more words and the guide.

checked 2026-10-20. education, not advice. found a mistake? see corrections.