Permit Signature Risk Explainer

WHAT IT DOES

Permit Signature Risk Explainer reads permit signature request data from your wallet (EIP-2612 permit or EIP-712 structured data), decodes the token address, spender address, approval amount, and deadline. It checks your current balance of the token being approved and your existing allowance for the spender. The tool then explains what the permit signature authorizes, what the spender can do with the signed permit, how much they can spend, whether the deadline is reasonable, and what risks to consider before signing.

HOW TO USE

When your wallet prompts you to sign a permit request, copy the permit signature data from your wallet or the requesting dApp. Open the Permit Signature Risk Explainer, connect your EVM wallet, and paste the EIP-712 JSON into the input area. Click "Analyze permit signature" to decode the message and generate a risk explanation. Alternatively, click "Manual entry" to enter the token address, spender address, amount, and deadline directly. The tool will display the token details, spender, amount, deadline, your balance, current allowance, and a risk level with a detailed explanation. Review the AI explanation to understand the risk, then verify the details in your wallet before signing.

TECHNICAL SECTION — PERMIT SIGNATURE RISK ASSESSMENT

The tool parses the EIP-712 permit signature data, extracting the domain, types, and message fields. It identifies the token address from the verifyingContract in the domain, and the spender address, amount, nonce, and deadline from the message. The tool retrieves the user's balance of the token and the current allowance for the spender via RPC calls. The risk assessment considers: whether the permit has expired, whether the amount is zero, whether the amount exceeds the user's balance, whether the amount is effectively unlimited (far exceeding the balance), the current allowance status, and the reasonableness of the deadline. The AI layer receives the decoded data and generates a plain-language risk explanation. This approach helps you understand the impact of a permit signature before you sign.

WHAT IT CANNOT SEE

This tool cannot read the actual intent behind a permit signature request. It cannot determine if the spender address is malicious without an external database. It cannot detect if the signature will be used maliciously after it is signed. It cannot read the user's private key or session data. It cannot verify if the token contract is legitimate. The user must still verify the permit request details in their wallet before signing. The AI explanation is generated from on-chain data and does not constitute financial advice or a security guarantee.

PLEASE NOTE

EVM chains only. Explanations 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 signatures. This tool is read-only; it never sends transactions or signs anything on your behalf.