A short, practical guide showing how to check and revoke token approvals (token allowance revoke Trust Wallet), why you should care, and step-by-step options you can use from your phone. In my experience revoke approvals immediately after a one-off swap. That simple habit has saved me headaches.
A token approval is an on-chain permission you give a smart contract (the "spender") that lets it move ERC-20 or similar tokens from your address using transferFrom. Think of it like giving a checkbook: the contract can draw up to the allowance you set.
Some dApps ask for a single-use approval equal to the swap amount. Others request an "unlimited" approval (a very large number) so you won’t need to approve again for future trades. That is convenient. And risky.
Should you revoke every approval? Not necessarily. But leaving large or unlimited allowances sitting on-chain increases the attack surface. If a dApp's contract or a connected third-party is compromised, an attacker could call transferFrom and drain whatever you allowed.
I once approved an unlimited allowance for a small swap during testing. Later I noticed a suspicious contract interaction and had to act quickly to revoke. It was a messy lesson. But the fix was simple: revoke and then re-approve only what I needed.
Most tokens implement the ERC-20 approve/allowance pattern: the token contract stores an allowance mapping keyed by owner and spender. The approve(spender, amount) call writes that amount on-chain. Some tokens implement the EIP-2612 permit pattern so approvals can be signed off-chain (gasless), but that depends on the token.
Unlimited approvals are usually the maximum uint256 value. That number is accepted by many dApps to avoid repeat approvals. But the contract logic is the same: if the spender has allowance, it can transfer your tokens.
Below are two safe, commonly used methods. If Trust Wallet does not show an in-app revoke UI for your network, use WalletConnect or a block explorer method.
And yes, it costs gas to revoke. But paying a few dollars to remove a large allowance is often worth the safety.
This method keeps you on trusted infrastructure. But make sure the explorer domain is correct. (Phishing sites can clone explorers.)
| Method | Requires WalletConnect | Visibility into allowances | Ease of use | Typical fee | Good for |
|---|---|---|---|---|---|
| WalletConnect + revoke site | Yes | High (site lists spenders) | Very easy on mobile | Gas to revoke | Mobile-first users who want quick cleanup |
| Block explorer revoke | Yes/No (desktop may inject) | High (direct on-chain data) | Moderate | Gas to revoke | Users who prefer official chain tools |
| Manual approve() with token contract | No (advanced) | High but technical | Harder | Gas to revoke | Developers and power users |
Sometimes older token contracts require you to set allowance to zero before you can set a new value. If a revoke tx fails, try approving 0 first, then approve the intended amount in a separate transaction. But check gas impact.
Who this wallet is best for: mobile-first DeFi users who want a straightforward non-custodial app for swaps, staking, and connecting via WalletConnect. If you use mobile dApps daily, the WalletConnect flow is convenient and familiar.
Who should look elsewhere: power users who need a desktop workflow for frequent batch revocations, or users who want integrated per-contract allowance management inside a desktop extension. If you handle large sums, consider combining a hardware wallet (see [/ledger-hardware]) with a desktop revoke process for extra safety.
Q: Is it safe to keep crypto in a hot wallet?
A: Hot wallets are convenient and non-custodial, but they have higher exposure than cold storage. Keep small operating balances in hot wallets for daily DeFi activity, and move long-term holdings to a hardware wallet. See security-features and backup-recovery for setup tips.
Q: How do I revoke token approvals?
A: Identify approvals via an approval-checker or explorer, connect your Trust Wallet via WalletConnect if needed, and set the allowance to 0 (revoke) or to a lower number. Confirm the on-chain transaction and verify it cleared. See the step-by-step above.
Q: What happens if I lose my phone?
A: You can restore access using your seed phrase on a new device. Keep your seed phrase offline and safe. See seed-phrase-backup and restore-import-wallet.
Q: Can I revoke unlimited token approval cheaply?
A: You will pay gas for the revoke transaction. Choose a time when gas fees are lower, or use a lower-fee network when applicable, but don't postpone revoking forever.
Token approvals are a small UX trade-off that give smart contracts permission to move your tokens. Revoke risky allowances, and prefer exact approvals when possible. In my experience revoke approvals proactively after one-off interactions — it’s a tiny habit that reduces long-term risk.
Start now: check your current approvals (use WalletConnect or the chain explorer) and revoke anything you don’t recognize. For related reading, see WalletConnect guide, dApp browser and WalletConnect tips, and phishing-and-scams.