How to solve checksum issue on Web3.py?

[imcrazysteven]

Hi mates.

Recently I have faced some issues using token contract address in web3.py.
This is PANICAN token address(0xa50ad00ce16fe2b0aabbb2db0ddf5590ff5769ff) in gmgn.ai and this one is checksummed token contract address in etherscan(0xa50AD00ce16fE2B0AABbb2dB0ddf5590FF5769fF)

The issue is wbe3.py cannot use the address in gmgn.ai, and only accepts checksummed address.
How to solve this problem?

Thank you in advance,.

[marksantiago290]

Hi @dodger213

You know, ethereum addresses are case-insensitive at the protocol level but checksum-sensitive in libraries like web3.py
You can simply solve this issue using this function of web3 library: to_checksum_address(address.lower())

        w3 = Web3(Web3.HTTPProvider(rpc_url))
        checksum_address = w3.to_checksum_address(address.lower())
        code = w3.eth.get_code(checksum_address)

Hope you can solve this issue with the above code.
Thanks.

[imcrazysteven]

Thanks.
Its working. Great