How to Review Wallet Permissions After Using a Dapp
A practical follow-up process for identifying and reviewing permissions after a session.
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Permissions accumulate silently. You connect a wallet to a dapp, sign one transaction, and the interface asks for a token approval you approve without much thought. Nothing about that approval is visible on the dapp’s homepage, nothing notifies you when it is used, and no wallet prompt ever appears again. The result is that a session you finished twenty minutes ago may still hold standing authority to move specific tokens from your address. Reviewing permissions afterwards is how you find that out before it matters.
Understand what you actually granted
Two different things get called “permission” in wallet interfaces, and conflating them is the reason people miss real exposure.
Token allowances let a contract move a specific token on your behalf, usually up to an amount you set, or unlimited if you accepted the default. An allowance persists on-chain after you disconnect. Disconnecting a dapp does not revoke it.
Signature permissions (sometimes called permit or eth_sign authorisations)
let a contract submit a typed message on your behalf without a transaction. Some are
expiring, some are not, and wallet UIs label them inconsistently. An unlimited
permit authorisation is often the more dangerous of the two, because it can move
funds through a path that never shows up as a transaction you signed.
Check both. Most wallet interfaces expose allowances in one place and signature authorisations in another, and the second is easy to forget.
The review, step by step
- Open your wallet’s own permissions or holdings screen — not the dapp’s dashboard, which only shows what that dapp knows about itself.
- List every entry that is not zero. A zero allowance is already revoked and needs nothing.
- Separate entries you actively use from entries you do not recognise. Unknown spender names are the finding worth acting on.
- For anything you no longer use, revoke the allowance. Revocation is itself a transaction, so it costs gas; batch it rather than doing one at a time if your wallet supports it.
- For anything you cannot identify, treat the name as meaningless and check the spender address against a block explorer instead.
Revoking does not reverse anything
Be clear about what revocation is for. It prevents future use. If a spender already drew tokens while holding an allowance, revoking the remaining balance changes nothing about that transfer. Revocation is cleanup of standing risk, not a refund mechanism, and it is not a way to undo a bad transaction.
Revoking also breaks functionality you may still want. A revoke that stops a liquidity position from being managed, or that breaks a recurring subscription, is a real cost. This is why the review is worth doing on a schedule rather than as a reaction to a scare.
One habit that prevents most of the accumulation
When you connect a dapp for the first time, grant only what the immediate action requires. An unlimited allowance given once is the default outcome of every interface, which makes it a poor habit even when the counterparty is legitimate. Revoking costs one transaction and a few minutes; discovering an unexplained transfer later costs considerably more, because a block explorer will tell you what happened but not let you undo it.