Approval Scope Explainer

WHAT IT DOES

Approval Scope Explainer 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 then explains the scope of the approval in plain language: what the spender can do, which assets are affected, how much they can spend, and whether the approval is limited or unlimited. The tool provides a clear scope classification (Limited, Unlimited, or Unknown) with a detailed description.

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 Approval Scope Explainer, connect your EVM wallet, and paste the transaction hash into the input field. Click "Look up transaction" to fetch the approval details and generate a scope explanation. 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 scope classification with a plain-language explanation. Review the scope explanation to understand exactly what you are approving, then verify the details in your wallet before signing.

TECHNICAL SECTION — APPROVAL SCOPE CLASSIFICATION

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. For approve and permit, it extracts the spender address and the approval amount. For setApprovalForAll, it extracts the operator address and the boolean approval value. The tool then classifies the scope: setApprovalForAll with true is classified as Unlimited; approve with the max uint256 value or an amount more than 10 times the user's balance is classified as Unlimited; specific finite approvals are classified as Limited; zero approvals are classified as Limited (Revoked). The AI layer receives the decoded data and classification, generating a plain-language scope explanation. This approach helps you understand the full scope of an approval 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 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 approvals. This tool is read-only; it never sends transactions or signs anything on your behalf.