Better error messages for predicate setData

[arboleya]

The current encoding error messages were weak on details and should be improved.

Note

• Incoming from Feedback - WebAuthn App QA Results #1545

[nedsalk]

One approach to do this is would be to make each coder aware of the abi it's encoding/decoding so that they can throw an abi-specific message like: encode-error: invalid u8 for property "a.b.c.d: passed in value is 24242, max is 255" or, to be fancier:

encode-error: invalid u8 while encoding abi:
{
  a: {
  a1: 54,
    b: {
      b1: "text",
      b2: "0xasdfwer",
      c: {
       c1: [1,2,3],
-----> d: Encoding 6464, max for u8 is 255.
      }
    }
  }
}

It would definitely be nice to have one of the above, but is it worthwhile to implement? On first hunch it feels like it would require a lot of custom code.

I don't see another way to substantially improve the error messages besides this.

@FuelLabs/sdk-ts What do you think?

[nedsalk]

@arboleya It might be wise to block this until the new encoding scheme is finished.

[arboleya]

Blocked by:

• Encoding / Decoding revamp #1672

[arboleya]

@nedsalk @Dhaiwat10 Do you guys think this is still blocked, now that we merged #1826?

cc @petertonysmith94

[petertonysmith94]

@arboleya I believe it's blocked by the new encoding #1672, rather than #1826.

In light of #1826, the problem will be on Predicate instantiation - rather than the setData method (which has been removed).

Maybe @Dhaiwat10 could confirm my understanding 🙏🏼

[arboleya]

I wonder if these errors weren't revert errors, in which case could be related to #1840.

[petertonysmith94]

I believe this issue is in reference to the Coder based errors in general. They're super generic (in description) and I don't believe there is any feedback to where or how these errors have been thrown (I could be wrong).

Take for instance the ArrayCoder, wouldn't the index of the Array be useful.

Also the aggregate coders, take TransactionScriptCoder for instance, would be good to know the argument that failed - rather than Invalid u8. when an error occurs for the witnessCount.

[arboleya]

This feedback came in response to the development of the WebAuthn, referenced in the issue description:

• Feedback - WebAuthn App QA Results #1545