How do I revoke smart contract permissions?

When granting permission to use smart contracts, you can grant it for the current transaction or unlimited. Giving an unlimited permit significantly saves you money compared to spending on commissions when confirming before each swap.

You can revoke permission through special services, for example:
• Ethereum: ETH Etherscan Token Approval Checker
• Binance Smart Chain: BSC Token Approval Checker
• Polygon: Polygon Token Approval Checker
• Arbitrum: Arbitrum Token Approval Checker
• Fantom: Fantom Token Approval Checker
• Optimistic Ethereum: Optimistic Ethereum Token Approval Checker
• Avalanche C-Chain, XDC Network, Shibarium, Base: Revoke.cash

To revoke permissions, follow these steps:
1. Follow the link to the browser of the corresponding blockchain.
2. Click "Connect to Web3"/"Connect Wallet" and select WalletConnect.
3. Connect your wallet.
4. In the list of permissions, there will be a “Revoke” button opposite each of them. Click it to revoke permission.

We plan to add the ability to revoke permission directly in the Tangem app in future updates.