gistfile1.txt

import re
import cbor2
import argparse
from base58 import b58encode

def extract_ipfs_hash(bytecode: str) -> str:
    """
    Extracts the IPFS hash from the CBOR-encoded metadata in Solidity bytecode.
    """
    # Look for the CBOR metadata marker (0xa264...) at the end of the bytecode
    match = re.search(r'a264.*$', bytecode)
    if not match:
        return None
    
    cbor_data = bytes.fromhex(match.group(0))
    try:
        decoded = cbor2.loads(cbor_data)
        ipfs_multihash = decoded.get('ipfs')
        
        if ipfs_multihash:
            # Convert to Base58 (CIDv0 format)
            return b58encode(ipfs_multihash).decode()
    except Exception as e:
        print(f"Error decoding CBOR: {e}")
    
    return None

def main():
    parser = argparse.ArgumentParser(description="Extract IPFS hash from Solidity bytecode.")
    parser.add_argument("bytecode", type=str, help="Hex string of the Solidity contract bytecode")
    args = parser.parse_args()
    
    ipfs_hash = extract_ipfs_hash(args.bytecode)
    print("IPFS Hash:", ipfs_hash if ipfs_hash else "Not found")

if __name__ == "__main__":
    main()