EVM Contract Source Fetcher
Fetches verified smart contract source code from block explorers (Etherscan, Polygonscan, etc.).
Usage
Run the script with address and optional chain:
bash
${CLAUDE_PLUGIN_ROOT}/scripts/crypto-evm-contract-source.sh <address> [chain]
Arguments
- •
address(required): Contract address in hex format (0x + 40 hex characters). ENS names are NOT supported. - •
chain(optional): Chain name - ethereum (default), polygon, arbitrum, optimism, base, bsc
Supported Chains
| Chain | Aliases | Explorer |
|---|---|---|
| ethereum | eth, mainnet | Etherscan |
| polygon | matic | Polygonscan |
| arbitrum | arb | Arbiscan |
| optimism | op | Optimism Etherscan |
| base | - | Basescan |
| bsc | binance | BSCScan |
Requirements
- •
cast(Foundry) must be installed - •API key must be set for the target chain:
- •
ETHERSCAN_API_KEYfor Ethereum (also used as fallback for other chains) - •
POLYGONSCAN_API_KEYfor Polygon - •
ARBISCAN_API_KEYfor Arbitrum - •
OPTIMISM_API_KEYfor Optimism - •
BASESCAN_API_KEYfor Base - •
BSCSCAN_API_KEYfor BSC
- •
Examples
bash
# Get WETH source on Ethereum
${CLAUDE_PLUGIN_ROOT}/scripts/crypto-evm-contract-source.sh 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2
# Get QuickSwap Router source on Polygon
${CLAUDE_PLUGIN_ROOT}/scripts/crypto-evm-contract-source.sh 0xa5E0829CaCEd8fFDD4De3c43696c57F7D7A678ff polygon
Note
For Solana program IDL, use the sol-program-idl skill instead.