Dangerous Approval Pattern Detector

WHAT IT DOES

Dangerous Approval Pattern Detector reads pending approval transaction data from your wallet or a transaction hash, decodes the function (approve, setApprovalForAll, or permit), and extracts the token contract address, spender address, and approval amount or scope. It analyzes the transaction for dangerous patterns including approvals to newly created contracts, approvals to addresses with suspicious transaction history, unlimited approvals, and patterns matching known scams. When a dangerous pattern is detected, the tool issues a clear warning explaining why you should not sign.

HOW TO USE

When your wallet prompts you to sign an approval transaction, copy the transaction hash from your wallet or the requesting dApp. Open the Dangerous Approval Pattern Detector, connect your EVM wallet, and paste the transaction hash into the input field. Click "Look up transaction" to fetch the approval details and run the pattern detection. Alternatively, click "Manual entry" to enter the token contract address, spender address, amount, and function type directly. The tool will display the transaction details and a detection result with a danger banner if any patterns are found. Review the AI warning to understand the risk, then verify the details in your wallet before signing.

TECHNICAL SECTION — DANGEROUS PATTERN DETECTION

The tool fetches transaction data from the blockchain using the connected wallet's provider. It decodes the function signature and arguments for approve, setApprovalForAll, and permit calls. The tool then applies multiple detection heuristics: checking against a database of known scam address patterns, detecting suspicious address characteristics (e.g., unusual leading zeros), identifying unlimited approval patterns (setApprovalForAll with true, approve with max uint256), and detecting amounts that far exceed the user's current balance. The AI layer receives the decoded data and detected patterns, generating a plain-language warning. This approach helps you identify potentially dangerous approvals before you sign.

WHAT IT CANNOT SEE

This tool cannot read the actual intent behind an approval transaction. It cannot determine if the spender address is malicious without an external database. It cannot detect if the approval amount is truly unlimited versus a large but finite number without comparing to the wallet balance. It cannot predict if the spender will use the approval. It cannot detect if the approval has been revoked at the time of the check. It cannot verify if the token contract is legitimate. The user must still verify the transaction details in their wallet before signing. The AI warning is generated from on-chain data and does not constitute financial advice or a security guarantee.

PLEASE NOTE

EVM chains only. Warnings are AI-generated from data the app reads on-chain—always review what you are actually signing in your wallet before approving it. The wallet's own signature prompt remains the final and only protection against unwanted approvals. This tool is read-only; it never sends transactions or signs anything on your behalf.