Decode Uniswap V3 multicall (web3.py)

uniswap_v3_multicall_decode.py

w3 = web3.Web3(HTTPProvider("PUT HERE YOUR PROVIDER"))
UNISWAP_V3_POSITIONS_NFT = "0xC36442b4a4522E871399CD717aBDD847Ab11FE88"
# example of Ethereum transaction calling multicall on Uniswap v3 (Etherscan)
tx = w3.eth.get_transaction(HexBytes("0xb835f4ab29be621eca1b2520a1e85d06b2e4fc03b84772e3fe05c220509e88b7"))
abi = await get_abi(Chain.ETHEREUM, UNISWAP_V3_POSITIONS_NFT)
contract = w3.eth.contract(HexBytes(UNISWAP_V3_POSITIONS_NFT), abi=abi)
fn, params = contract.decode_function_input(tx.input)
fn_and_params: dict[str, list[dict[str, str]]] = {}
for key, value in params.items():
    for v in value:
        fn, params = contract.decode_function_input(v)
        if fn.fn_name == "multicall":
            params = params["data"]
            for p in params:
                fn, params = contract.decode_function_input(p)
                fn_and_params[fn.fn_name] = params.get("params", params)
        else:
            fn_and_params[fn.fn_name] = params.get("params", params)

for key, value in fn_and_params.items():
    print(f"\n{key}: {value}")