Glossary
Approval
Permission for a smart contract to move tokens from your address, often wider than people realise.
On Ethereum-style networks, many apps do not take your tokens in one step. First you approve a contract to spend them. That approval can last until you revoke it, and it can cover more than the amount you meant to swap today.
A malicious or buggy contract with an open approval can empty a wallet later. Revoke approvals you no longer need. A hardware wallet does not save you if you confirm a hostile approval on its screen.
