Connection is not token approval
Connecting a wallet to a web3 site usually shares a public address and lets the site read public account information. A token approval, also called an allowance, is a separate on-chain permission that lets a specific smart contract move a specified token on your behalf. Disconnecting a site does not automatically erase an allowance already recorded by the token contract, so the two permissions should not be confused.
What an allowance record means
When you inspect an approval, note the network, token contract, spender address, allowance limit, and amount already used where available. An unlimited allowance may be requested for convenience, but it can expose the approved amount if the spender is compromised or behaves maliciously. An approval record does not prove that a contract or service is safe, and a familiar interface does not change the permission stored on-chain.
Grant only the needed scope
Before signing a new approval, ask which feature needs it, which token is involved, and which contract receives the permission. If your wallet lets you set a custom amount, limiting the allowance to what the planned action needs can reduce exposure. If the amount, token, or spender does not match the action you intended, stop and consult the service’s official documentation rather than signing to clear a warning or unlock a reward.
Review approvals safely
An approval checker must match the network whose permissions you want to review. Follow a link from the official wallet documentation or use the wallet’s own portfolio tools; avoid links sent through unsolicited messages or search ads. Check the domain carefully. If a tool asks to connect or sign, read the request and determine whether it is only a read operation or an actual transaction that changes on-chain permissions.
Costs and limits of revocation
Revoking an allowance generally submits an on-chain transaction that reduces or removes the existing permission. It can require a network fee, and the old permission remains until the transaction is confirmed. Revocation cannot reverse tokens already transferred or recover assets already stolen. You may need to approve the contract again to use the service later, and some deposits or pool interactions may be affected, so review the function before submitting a transaction.
Distinguish approval from a token transfer
A hypothetical user wants to swap 50 tokens, but the wallet asks them to approve 5,000. Approval is not the same as an immediate transfer, but it grants a contract permission it may use later; check the amount, contract address, and revocation method.
A cautious verification routine
Check approvals by network from time to time, but do not click unfamiliar addresses or revoke everything without understanding the consequences. Compare the token and spender with official service documentation and consider whether the permission is still needed. If you may have signed a malicious request, do not assume revocation alone is enough; follow trusted security guidance for protecting any remaining assets and account credentials.