Your Wallet Is Not a Charity: How to Spot Approval-Drain Scams

The Trap You Didn't Know You Set

You connect your wallet to a shiny new memecoin site. You click "Approve" because the popup asked nicely. Next thing you know, your SOL or ETH is gone — drained to an address you've never seen.

This isn't a hack. You gave them permission. And they took everything your approval allowed.

This is an approval-drain scam. It's the most common way beginners lose money in crypto. Not because the code was cracked. Because they signed a transaction that said, "Yes, take my tokens."

What Actually Happens

When you connect your wallet to a dApp, you're not just logging in. You're granting specific permissions. Legit sites ask for limited access — like "check my balance" or "send this one transaction." Scam sites ask for unlimited access to specific tokens or even all tokens in your wallet.

Here's the key: that approval is a smart contract call. Once you sign it, the scammer can execute transfers from your wallet without asking you again. They can wait days, weeks, or months before draining you — or they do it instantly while you're distracted.

The Red Flags You Can Spot

1. The site asks for unlimited token approval.

Any dApp that requests approval for an unlimited amount of a token (like "unlimited USDC" or "unlimited SOL") is a massive red flag. Legit swaps and staking sites usually ask for only the amount you're transacting. Scammers want the keys to the whole kingdom.

2. The approval transaction has no clear purpose.

If you connect your wallet and immediately get a popup asking to "Approve" without explaining what for, don't sign. A legitimate site tells you exactly what you're approving — "Approve 0.5 SOL for swap" or "Approve collection for listing." Vague approvals are traps.

3. The site looks rushed or copied.

Check the URL. Is it a misspelling of a known site? Does the design look like a template? Does the Twitter account have zero followers? Scammers spin up dozens of these per day. They don't bother polishing.

4. The site asks for permissions before you've done anything.

If you land on a page and immediately get a wallet popup asking for token approval — before you've clicked a button or started a trade — that's a drainer script. Close the tab immediately.

How to Check Approvals Safely

You can see what permissions your wallet has already granted. On Solana, use a block explorer like Solscan to view your token approvals. On EVM chains (Ethereum, BSC, Arbitrum, etc.), use a token approval checker like Etherscan's tool or Revoke.cash.

Look for any approval to an address you don't recognize. If you see one, revoke it immediately. This costs a small gas fee but saves your entire balance.

On GMGN, you can check a token's contract for suspicious functions before you trade. Look for functions like "drain," "transferFrom," or "approve" with no limits. If the contract has a hidden backdoor to drain approvals, GMGN's security labels often flag it.

The Golden Rule

Never approve a transaction you don't fully understand.

If you're on a site you don't trust 100%, use a burner wallet with only the funds you're willing to lose. Never connect your main wallet to an unknown dApp. This is not paranoia — it's basic operational security.

What to Do If You've Been Drained

First, don't panic. You can't reverse the transaction, but you can prevent further loss:

• Immediately revoke all approvals from that dApp's contract address.
• Move remaining funds to a new wallet that has never interacted with the scam site.
• Report the scam address to block explorers and community alert channels.

Most drains happen because the victim didn't check what they signed. The blockchain doesn't forgive mistakes. But it does give you tools to protect yourself — if you use them.

Final Word

Every approval you sign is a key you hand over. Some keys open one door. Some keys open every door in the house. Scammers are counting on you not knowing the difference.

Now you know. Don't be their next victim.

Read time: 4 minutes