I Was trying to interact with a smart contract named clearingHouse and use the function "openPosition", I went ahead and matched the data types as they were described using python3 web3 package but I still get this error which shows I ve matched everything correctly

Could not identify the intended function with name openPosition, positional arguments with type(s) (address,bool,bool,int,int,int,int,bytes) and keyword arguments with type(s) {}. Found 1 function(s) with the name openPosition: ['openPosition((address,bool,bool,uint256,uint256,uint256,uint160,bytes32))'] Function invocation failed due to no matching argument types.

as shown above all my data types match the ones that are required

thanks for your time and help.

1 Answer 1


I faced the same problem, but I can't find a solution yet. Maybe you managed to overcome it?

Upd: My problem was that the parameters had to be passed as an array with a tuple: arg = [(...parameters...)]. And also I incorrectly counted one of the function parameters and the number went beyond the boundaries of the type in solidity (uint24). Therefore, I advise you to recalculate the call parameters again.

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