Type declaration: This is a Type C "pitfall review" article. Its core purpose is to explain why you should never directly confirm such requests, compare the wrong path with the correct approach, and help users avoid EIP-7702 phishing traps.
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A wallet signature request pops up. The screen shows a string of hash you cannot understand, and you click confirm without thinking twice.
If you do this on an unfamiliar website, your wallet may no longer belong to you. This is not fear-mongering. After EIP-7702 went live, research reports indicated that over 63% of EIP-7702 authorization transactions were linked to attacker-controlled contracts, with confirmed losses exceeding $2.36 million.
What Happens the Moment You Click Confirm?
EIP-7702 is a new feature introduced in Ethereum's Pectra upgrade. It allows a regular EOA wallet to temporarily borrow smart contract code to perform batch operations, such as batch transfers or paying gas with USDT.
The original intention is good. But the problem is that once you authorize a malicious contract, scammers gain "persistent execution rights" over your wallet and can drain all your assets in a single transaction. Unlike a regular token approval, this authorization does not expire unless you manually revoke it.
The Full Phishing Attack Path: How Scammers Trick You Into Clicking
Let me break down a typical EIP-7702 phishing attack flow. See if this pattern looks familiar.
Step 1: Lay the bait. You see a link in X (formerly Twitter), a Telegram group, or Discord claiming to be an "official airdrop," "wallet upgrade reward," or "gas sponsorship verification." The wording usually makes you feel like you will miss out if you do not click.
Step 2: Fake the signature. After clicking the link, your wallet shows a signature request. This request may look like a normal login verification, batch transaction, or swap confirmation, but behind the scenes it is actually an EIP-7702 malicious authorization signature.
Step 3: Your wallet becomes an "ATM." After you confirm the signature, the malicious contract is "installed" onto your address. The scammer gains persistent control over your wallet and can sweep all your ETH, USDT, and NFTs in one transaction without you noticing. In August 2025, reports indicated that such attacks affected 15,230 victims, with total losses reaching $12 million.
The Correct Approach: If You Do Not Know the Website, Clicking Means Losing
Do not take responsibility for signatures from strangers. Only take responsibility for signatures you actually understand. If you encounter any of the following situations:
Risk warning: If you see any popup on an unfamiliar website prompting you to "upgrade to a smart account," "sign a 7702 authorization," or "enable batch transactions," or if the signature request only shows a hash value you cannot understand at all, do not click "Confirm." Just close the page.
What if you already clicked confirm?
[What to do]: Immediately revoke the delegation to remove the risk of wallet control.
[How to do it]:
Check authorization on Etherscan: Open Etherscan, enter your wallet address, and find the "Authorizations (EIP-7702)" section under "More Info" or other information areas. If there is a delegated address listed, your wallet has been authorized.
Revoke the delegation: Point the delegated address to 0x0000000000000000000000000000000000000000 (the zero address) to clear the delegation status. Some wallets already support one-click revocation. If yours does not, you may need to contact official support or use professional tools.
[Completion standard]: Confirm on Etherscan that the "Authorizations (EIP-7702)" section shows the delegated address has been cleared, displaying either empty or the zero address.
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A Checklist to Apply Beyond This Case
Next time you encounter any website asking for a signature, run through this checklist:
| Check Item | Safe Status | Danger Signal |
|---|---|---|
| Website source | Manually typed official URL | Link sent by a stranger, search engine ad |
| Signature content | You understand the specific operation | Only a string of gibberish (hash), no description at all |
| Wallet prompt | Shows clear operation details | Only shows "authorize" or "upgrade" |
| Operation intent | Something you actively wanted to do (e.g., swap) | Something you have never heard of (e.g., "upgrade wallet") |
How to verify after completing the operation: Open Etherscan, enter your wallet address, and confirm there are no unfamiliar delegated addresses in the "Authorizations (EIP-7702)" section. If there are, you need to revoke them immediately.
Next step: If you have ever clicked buttons like "upgrade wallet" or "batch authorization" on unfamiliar websites in the past, go check the "Authorizations (EIP-7702)" section on Etherscan right now. Confirming there are no unfamiliar delegated addresses is a habit far more useful than asking others after something goes wrong.
