Support error type

[Christoph Burgdorf]

There doesn't seem to exist support for the new error type that is defined in the latest ABI spec.

Consider the followign solidity code:

pragma solidity ^0.8.5;

error DummyError(uint256 reason);

contract Foo {

  function bar() public pure {
    revert DummyError({reason: 4});
  }
}

The ABI that solc generates from this is:

[
   {
      "inputs":[
         {
            "internalType":"uint256",
            "name":"reason",
            "type":"uint256"
         }
      ],
      "name":"DummyError",
      "type":"error"
   },
   {
      "inputs":[
         
      ],
      "name":"bar",
      "outputs":[
         
      ],
      "stateMutability":"pure",
      "type":"function"
   }
]

Feeding that to ethabi results in the following error:

"Invalid operation type error."

So, I guess error is just not yet supported as a type.

[Adam Fuller]

We are also seeing this issue on graphprotocol/graph-node graphprotocol/graph-node#2577

[Adam Fuller]

Hey! Any update on this?

[Georgios Konstantopoulos]

bump @vkgnosis do you think Gnosis is able to allocate any resources on this? we're also encountering it in Foundry

[Nicholas Rodrigues Lordello]

Unfortunately we don't have resources for this at the moment. Fortunately, someone has a draft PR already started here: #251

I'll be happy to review and merge as soon it's ready.

[Matthias Seitz]

@nlordell #251 is ready now, also I forgot to follow up on #248, that is already ready now

Could you please have a look, can prepare a new release after that?