A Chrome extension that enhances Etherscan by displaying function selectors for Ethereum smart contracts. Primarily for unverified contracts, but can also be used for verified contracts.
- Automatically detects contract pages on Etherscan
- Displays function selectors in a clean, floating panel
- Shows function signatures and their corresponding 4-byte selectors
- Easy to use with a non-intrusive interface
- Purposely does not highlight erc20 functions
Contract overview with function selector panel
Detailed view of contract functions with selectors
- Clone this repository
- Open Chrome and navigate to
chrome://extensions/ - Enable "Developer mode" in the top right
- Click "Load unpacked" and select the extension directory
- Visit any contract page on Etherscan (e.g., https://etherscan.io/address/[contract_address])
- The extension will automatically detect the contract and display function selectors
- Use the floating panel to view function signatures and their selectors
- Click the close button (×) to dismiss the panel
The extension requires minimal permissions:
activeTab- To interact with Etherscan pages
- No external API calls
- Only runs on Etherscan domains
- No data collection or tracking
- add support for other etherscan forks
This extension uses EVMole for extracting function selectors and contract information from EVM bytecode.