Multicall module

[Whynot63]

What feature should we add?

Hi! I writed multicall module, which is native for web3.py. Should I include it to web3.py via PR?

[Whynot63]

Usage example:

w3 = Web3(..., external_modules={"multicall": AsyncMulticall})

usdt = w3.eth.contract(usdt_address, abi=erc20_ab)

usdt_balance, native_balance = w3.multicall(
    usdt.functions.balanceOf("0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045")
    w3.multicall.functions.getEthBalance("0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045")
).call()