Use thiserror for validator-client

[durch]

No description provided.

[jstuczyn]

You will probably either want to either remove the comment I made regarding CodedError or move it to the new definition. Or ideally find out what's the proper type for that. The comment in question is:

// this is the case of message like
/*
{
  "code": 12,
  "message": "Not Implemented",
  "details": [
  ]
}
 */
// I didn't manage to find where it exactly originates, nor what the correct types should be
// so all of those are some educated guesses

[durch]

> {
>   "code": 12,
>   "message": "Not Implemented",
>   "details": [
>   ]
> }

I've actually seen this today, it seems to pop if you hit an unimplemented route, for example if you just hit /smart you end up with 501 - Not implemented. I'll take a look at validator code

[jstuczyn]

Yep, that's exactly how I encountered it. I tried to find where it originated in the validator codebase, but I could not find it anywhere