Where can I find AbiEncoderV2 encoding Tuple algorithm?

I would like to add Tuples support to a ruby library.

1 Answer 1


Basically, a tuple is encoded as if all its members were separate parameters, so the following function returns true:

struct Foo {
  uint x;
  uint y;
  uint z;

function foo () public pure returns (bool) {
  return keccak256 (abi.encode (1, 2, 3)) ==
         keccak256 (abi.encode (Foo (1,  2, 3)));
  • 1
    If I understand the question correctly, then this dude is looking for a client-side (off-chain) implementation in Ruby. Commented Mar 11, 2020 at 12:35
  • No, he is going to implement this in Ruby and wants to understand how it works in Solidity. Commented Mar 11, 2020 at 12:47

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