How solidity make function signature with tuple(nested abi)?

Question

struct Test {
  uint ui;
  string s;
}
function test(Test t) public {
  emit Log(t.ui, t.s);
}

I have some knowledge about ABI. I made this contract with experimental ABIEncoderV2 option. In conclusion, this function's signature is 0x6056f4cc, I found this value in opcode. I tried some case test(uint256,string), test(tuple(uint256,string)), test(tuple), test(tuple[uint256,string])) with sha3... but no one make correct signature. How solidity make function signature with tuple?

Raghav Sood · Accepted Answer · 2018-08-09 05:25:44Z

5

You're close with the first one. The actual encoding is done from test((uint256,string)).

bytes4(keccak256("test((uint256,string))"): 6056f4cc

answered Aug 9, 2018 at 5:25

Raghav Sood

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1 Comment

Krzysztof Kaczor Over a year ago

Here's the online encoder if you need one: piyolab.github.io/playground/ethereum/…

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