Dev Tools · 1h ago
Build a Python Tool to Detect and Revoke Risky ERC-20 Approvals
A tutorial shows how to build an automated scanner using Python and Web3.py to audit ERC-20 token allowances. The tool queries approval events via Etherscan, flags unlimited approvals and unverified contracts, and generates revocation transactions. It helps users identify and revoke risky allowances that could be exploited by compromised DeFi contracts.
Meridian48 take
While useful for individual users, the tool's reliance on Etherscan's API and manual revocation steps limits its scalability for broader security monitoring.
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Building an Automated Token Allowance Scanner: Detect and Revoke Risky ERC-20 Approvals with Python →
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erc-20python-security