EVM Contract Fetcher

This tool retrieves verified Solidity source code, ABI, and related verification metadata for a contract address on a specified EVM chain using Sourcify and, optionally, block explorer APIs. It accepts chain_id (integer chain identifier), contract_address (0x-prefixed contract address), and an optional explorer_api_key (string API key for explorers that require authentication). Use it to consolidate on-chain verification status and normalized contract metadata into a single structured response. The tool must always produce output that strictly validates against the system-provided structured output schema, with no extra fields or type deviations.