Reviewing your approvals on a schedule
- Author
- CRYPTO PORT Editorial
- Published
- Updated
- Reading time
- 5 min
In short
Approvals you granted in the past stay live until revoked. Every few months, open an approval manager and revoke what you no longer use and what you do not recognise. Revoking costs gas, and it reliably lowers your maximum exposure.
Key points
- Approvals never expire — the ones for services you stopped using are still there
- Revoke unlimited allowances and blanket NFT permissions first
- Fake approval managers exist; open the official URL from your own bookmark
- Revoking costs gas, so setting a recurring review day makes it sustainable
Definition
Periodically listing the token-moving permissions (approve / setApprovalForAll) your wallet has granted to contracts, and revoking those you no longer need.
Use DeFi and NFTs for a while and approvals accumulate by themselves: a DEX you used once, an NFT marketplace that no longer exists, an app you tried and forgot. Every one of those grants stays live until you revoke it. The danger is that if a vulnerability is later found in that contract, or its operators change, or its admin keys are stolen, your approval becomes the exit route.
The review starts by entering your wallet address into a block explorer or approval manager and listing the live approvals. Work in priority order: unlimited allowances, allowances on tokens you hold a lot of, NFT `setApprovalForAll` grants, and any counterparty contract you do not recognise. An approval you have no memory of granting may date from a signature on a fake site — revoke that first.
Revoking means sending a transaction that sets the allowance to zero, so each revocation costs gas. You can reduce the burden by choosing a quiet period for fees or using a tool that batches several revocations. Either way, budget for it as the cost of protecting the assets.
The trick to actually doing this is to put it on a date — fold it into a monthly checklist or a quarterly calendar entry. And remember that approval managers themselves are impersonated: open yours from a URL you verified and bookmarked, not from a search result. No legitimate tool of this kind will ever ask for a seed phrase.
Watch out for
- · Revoking does not return anything already taken
- · Fake approval managers exist — open yours from your own bookmark
- · If you find an approval you never granted, treat the whole wallet as suspect
Frequently asked questions
If I move everything to a new wallet, do the old approvals stop mattering?
As long as no balance ever returns to that wallet, they cause no harm. But if you plan to keep receiving at that address, the approvals are still live. So: revoke on an address you will keep using, and migrate away entirely from one you will not.