How to Revoke Smart Contract Permissions?

Why Revoke Smart Contract?

You can revoke a smart contract's permission at any time, and it is advisable (or sometimes necessary) to do so in the following scenarios:

1. If you no longer use the DApp or DAO that requires access to your assets.
2. If there's a suspicion that the contract you're using could be susceptible to hacking.
3. If developers of a DeFi project alert about a protocol breach.
4. If you wish to limit access to your assets universally.

To revoke smart contract allowances, you must submit a transaction request to the blockchain. This request should specify the smart contract's address you wish to deactivate and the token amount for which you intend to withdraw third-party access permission.

There are various methods to submit a revocation request: this can be accomplished through the web interface of your DEX wallet or via an external service.

How to Revoke Permissions with MetaMask?

Here's a step-by-step guide to revoking permissions using MetaMask:

1. Open your wallet.
2. Go to the “Assets” tab.
3. From the list, select the asset for which you want to revoke access.
4. Click on the “Revoke” button.
5. Confirm your action.

Once the request is confirmed, access to the contract will be revoked.

How to Revoke a Smart Contract Through Third-Party Apps

To safeguard your assets against external attacks on protocols, you can use specialized services or blockchain explorers.

First, you need to connect your wallet to the application, which will then display a list of all smart contracts to which you have granted permissions. Select the contract you wish to revoke access for and confirm the action.

For this purpose, you can use multichain tools such as:

• Revoke.cash
• EverRise
• Unrekt
• Cointool

Additionally, there are services focused on managing access to assets on the Ethereum network, like Approved.zone. For revoking a contract within the BNB Smart Chain network, Beefy.finance is a recommended optimizer.

If you prefer not to trust third-party websites and would rather interact directly with the smart contract, blockchain explorers like Etherscan or Polygonscan are advisable. You'll need to find your address on the explorer and connect your wallet. Then, from the list that appears, select the application for which you wish to revoke permission and confirm the termination of access to your assets.

Security Recommendations

When revoking smart contracts, it's important to adhere to security measures:

1. Use secure wallets that support permission revocation when interacting with Web3 platforms.
2. Always verify the details of a transaction before confirming it.
3. Do not approve a transaction if there's any doubt about potentially transferring funds to scammers.
4. In the event of a hack, if you're unable to quickly determine which smart contract to revoke, it's safer to revoke access to all. You can sort out the specifics later when the threat to your assets has diminished.

Cybersecurity experts also recommend revoking smart contracts that you haven't used in over a month. This action will not impact your DeFi pool positions. You'll continue to earn from staking and farming as before.