undefined method `decode_tuple'

[rjurado01]

Steps to reproduce

I have this contract:

pragma solidity ^0.6.0;
pragma experimental ABIEncoderV2;

contract Tickets {
  struct Ticket {
    uint id;
    int val;
  }

  Ticket[] tickets;

  function addTicket(uint id, int val) public returns(bool success) {
    Ticket memory newTicket;
    newTicket.id = id;
    newTicket.val = val;
    tickets.push(newTicket);

    return true;
  }

  function getTicket(uint id) public view returns(Ticket memory) {
    uint index;

    for(uint i = 0; i<tickets.length; i++){
      if (tickets[i].id == id) {
        index = i;
        break;
      }
    }

    Ticket memory t = tickets[index];

    return t;
  }

When I call getTicket method using this gem:

contract.call.get_ticket(1)

It throw this error:

/ruby/2.5.0/lib/ruby/gems/2.5.0/gems/ethereum.rb-2.4/lib/ethereum/decoder.rb:14:in `decode': undefined method `decode_tuple' for #<Ethereum::Decoder:0x00000000023f78a0> (NoMethodError)

Then same happens when try to send a tuple:

/ruby/2.5.0/lib/ruby/gems/2.5.0/gems/ethereum.rb-2.4/lib/ethereum/encoder.rb:14:in `encode': undefined method `encode_tuple' for #<Ethereum::Encoder:0x000000000402ad38> (NoMethodError)

System configuration

Ruby version: 2.5.0
Solc version: 0.6.2
OS: ubuntu 18.04

[anonymousplz]

https://github.com/ethers-io/ethers.js/blob/36172f7f7ba1d2043d6e331c76cfb4c52d425ba7/src.ts/utils/abi-coder.ts#L900 👈🏻 reference implementation

[kurotaky]

@rjurado01
Thanks for the issue. Please migrate as we will maintain the eth.rb library here. ;)