Burner Wallet

A burner wallet is a separate account funded with only what a particular interaction needs, used for anything whose contract you have not verified — a mint, an airdrop claim, a new application, a link someone sent you. The reasoning is containment rather than prevention: the signature you are about to give may be malicious, and the question that decides the outcome is not whether you avoid signing it but what the account you signed from was holding and what it had already approved. A burner holds almost nothing and has approved almost nothing, so the same malicious signature costs a few units of gas. Two habits make the separation real. Do not fund a burner from the wallet you are protecting, because the transfer links the two publicly and can undo any privacy you wanted from the split. And treat a burner as spent once it has interacted with something suspect, rather than topping it up and reusing it as if the approvals it granted had lapsed.