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I have a smart contract contains this method:

function addOneUser (User memory _user) public {

         bytes32 hash = keccak256(abi.encode(_user.name));
         users[hash] = _user;

    }

I want to invoke this method using singTransaction then sendSignedTransaction, how to encode data (which _user) into transaction raw ?

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In current versions of Solidity you cannot send struct type parameters to the methods unless you use experimental mode using this statement in the header:

pragma experimental ABIEncoderV2;

You should see this question for more details: Passing Struct as an argument in call

  • the question about signing a transaction, the code above is not the full smart contract, unless you can say also: "you can not declare function outside contract {...}" – maroodb Sep 26 at 8:18

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