Revoke Token Approvals on Base
Check and revoke all dangerous token approvals on Base.
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What Is Base?
Base is a Coinbase-built Ethereum Layer 2, launched in August 2023 on Optimism's OP Stack. It was the fastest-growing chain of 2024 โ surpassing Arbitrum in daily transactions and reaching over $3 billion TVL within its first year. Ultra-low fees (typically under $0.01) and Coinbase's 100+ million user base make Base the most accessible Web3 onboarding gateway today. The ecosystem includes Aerodrome Finance (Base's largest DEX), Uniswap, Aave, Morpho, and hundreds of consumer apps. Base became the home of the 2024 meme coin wave (BRETT, TOSHI, DEGEN) and SocialFi applications. Base has no native token โ ETH is used for gas.
What Are Base Token Approvals?
Every time you swap tokens, deposit into DeFi protocols, or interact with any DApp on Base โ you sign an approval granting that smart contract permission to spend your tokens. These approvals persist on the blockchain permanently until you explicitly revoke them.
If an approved contract gets hacked or compromised later, all your approved tokens can be drained in a single transaction. Regularly checking and revoking approvals is the simplest and most effective way to protect your assets.
Base is newer but not immune to risks:
- ยทRocketSwap (August 2023, ~$870K): The first significant hack on Base โ a private key leak drained all liquidity; users who had approved RocketSwap lost all their tokens. Read more
- ยทBald meme coin rug pull (July 2023, ~$23M): The first viral meme coin on Base was rug-pulled โ the developer drained all liquidity after thousands of users had approved and deposited into the pool.
- ยทNormie token exploit (May 2024, ~$6.6M): A Base token was exploited via flash loan, crashing 99% in minutes โ users with approvals for related liquidity pools suffered losses.
- ยทGrand Base (April 2024, ~$2M): A Base protocol was drained via private key compromise โ existing approvals amplified losses across the user base.
How to Revoke Base Token Approvals
Enter your wallet address in the search field above and select Base in the blockchain selector. The tool scans your complete approval history and lists every contract authorized to spend your tokens. Each approval shows which token, which contract, and how much it can withdraw. Click Revoke to cancel each approval.
Frequently Asked Questions
How much does revoking a Base token approval cost?
Very little โ typically just $0.01 to $0.1 depending on the chain and current conditions, as gas fees are very low today. You only spend a small amount of native token for gas; the tokens you're revoking access to are never affected.
Is revoking a token approval safe?
Completely safe. Revoking simply calls approve(spender, 0) โ no different from a swap or transfer. You never enter your seed phrase or private key anywhere. The tool reads public approval data from the blockchain and sends the revoke transaction through your connected wallet โ your wallet (like MetaMask) will show a confirmation popup before anything is sent.
Do Base approvals expire automatically?
No. Token approvals persist on the blockchain permanently until you explicitly revoke them. Even if you stop using a DApp, the approval remains active and is a potential security risk.
Will revoking affect my LP positions or staking?
No effect on existing positions. Revoking only prevents the contract from spending more of your tokens โ active LP positions, staking, and yield farming continue as normal. Your next interaction with that DApp will require a new approval.
What is an unlimited approval and is it dangerous?
An unlimited approval lets a smart contract spend any amount of your tokens without restriction. Most DApps request unlimited approvals by default to save users gas on future transactions. The risk: if that contract gets hacked or exploited, all your approved tokens can be drained in a single transaction. Revoke unlimited approvals from protocols you no longer use.
Do I need to connect my wallet to check approvals?
No. Just enter a wallet address (0x...) to view all approvals โ no wallet connection or signing required. You only need to connect your wallet when you want to revoke.
After revoking, will DApps still work normally?
Yes, DApps continue working normally, but your next interaction will require a new approval. For example, after revoking a Uniswap approval, the next swap will include an approve step before executing โ this is expected behavior and only takes a few seconds.
Can revoking approvals recover already-lost tokens?
No. Revoking only prevents further losses โ it cannot restore assets already drained. If you were hacked, you can message Airdrop101 to investigate the root cause, protect your other wallets, and explore recovery of any remaining assets.
ETH deposited to my wallet gets swept immediately โ can revoking help?
This usually means your seed phrase is compromised and a hacker installed a sweeper bot โ revoking approvals won't fix this. You can message Airdrop101 for a wallet analysis, guidance on protecting remaining assets, and recovery support if there's still an opportunity.