How to revoke token approvals in Trust Wallet? (Smart Contract Safety)

Understanding Token Approvals in Trust Wallet

1. Token approvals are permissions granted to smart contracts that allow them to access and transfer tokens from your wallet without further confirmation.

2. These approvals are recorded on-chain and persist until explicitly revoked, even if the associated dApp is no longer used.

3. Malicious or compromised contracts can exploit active approvals to drain funds silently.

4. Trust Wallet does not auto-revoke approvals upon uninstalling or disconnecting a dApp—manual intervention is required.

5. Users often overlook approval management, leading to long-standing, unnecessary authorizations across multiple blockchains.

Locating Active Approvals in Trust Wallet

1. Open Trust Wallet and navigate to the Browser tab, then enter https://revoke.cash or https://www.tokenunapprove.com directly.

2. Connect your wallet using the in-app wallet connector; ensure you’re connected to the correct network (Ethereum, BSC, Polygon, etc.).

3. The interface displays all approved contracts sorted by token, spender address, and approval amount—including infinite allowances.

4. Trust Wallet itself does not surface approvals natively within its settings menu—third-party tools are currently the most reliable method.

5. Cross-check contract addresses against known protocols using Etherscan or BscScan to verify legitimacy before revoking.

Executing Revocation Transactions

1. Select individual approvals or use bulk revoke options for multiple contracts on the same chain.

2. Each revocation initiates a standard Ethereum-style transaction calling the approve(address spender, uint256 amount) function with zero value.

3. Gas fees apply per transaction; some tools batch revocations to reduce cost, but each requires separate on-chain confirmation.

4. After signing, wait for block confirmation—status updates may take 15–60 seconds depending on network congestion.

5. Never skip verifying the recipient address in the wallet prompt—fraudulent sites may inject malicious contract calls during approval flow.

Risks of Unrevoked Approvals

1. A single unrevoked approval to a compromised contract can result in total loss of all tokens governed by that allowance.

2. Rug pull projects often retain approvals post-launch to siphon remaining liquidity from early adopters’ wallets.

3. Phishing domains mimicking legitimate dApps may request approvals under false pretenses, then execute unauthorized transfers later.

4. Some DeFi protocols reuse contract addresses across forks or upgrades—old approvals may inadvertently grant access to new, unvetted logic.

5. Token standards like ERC-20 do not enforce automatic expiration; indefinite allowances remain fully functional until revoked.

Frequently Asked Questions

Q: Can I revoke approvals directly from Trust Wallet’s built-in DApp browser without external sites?A: No. Trust Wallet does not provide an internal interface for viewing or revoking token approvals. External audited tools like Revoke.cash are necessary.

Q: Does revoking an approval affect my ability to use the dApp again in the future?A: No. Revocation only removes existing permission. You must re-approve when interacting with the dApp again—this gives you full control over timing and amount.

Q: Are NFT approvals handled the same way as ERC-20 token approvals?A: No. NFT approvals use different functions—setApprovalForAll for collections or approve per-token—and require separate revocation steps via tools supporting ERC-721/1155 standards.

Q: What happens if I revoke an approval while a transaction is pending on that contract?A: Pending transactions will still execute if they were signed before revocation. Revocation only prevents future calls—not those already submitted to the mempool.