Re: CHAPI Playground's Latest Update - Verification Workflows

Hi Orie,

Following up on your questions:


> Do you know how many other implementations are interoperable with yours?

No, I don't. We haven't done interop testing for VC API exchanges yet.
The implementation (under "EWF") is in the issuer (
https://w3c-ccg.github.io/vc-api-issuer-test-suite/) and verifier (
https://w3c-ccg.github.io/vc-api-verifier-test-suite/) test suites but
there isn't a shared test suite for VC API exchanges yet to my knowledge.


> It seems you have a reasonable number of related endpoints marked "A
> NON-STANDARD endpoint currently."

Yes, that's right. There's a table in the docs for our implementation that
summarizes which endpoints are standard and which are not:
https://github.com/energywebfoundation/ssi/tree/develop/apps/vc-api#standard-vs-custom-endpoints
I think the interaction between the holder and the verifier/issuer via VC
API exchanges (the "Initiate Exchange" and "Continue Exchange" endpoints)
is in the "standard" group.
A non-standard endpoint is, for example, how one configures an exchange.
Perhaps the location of our non-standard endpoints could be reworked to
make the standard vs non-standard endpoints clearer.

It seems your implementation supports JWTs as well.
> This is excellent news, since we are interested in JWT based exchange
> endpoint flows.
> Do you know how many implementers have demonstrated interoperability for
> JWT based exchange endpoints?

We don't yet have JWT support for our VC API implementation but it would
certainly be interesting to know if there is support for JWTs in other
implementations out there.

Thanks,

John Henderson
Energy Web

On Tue, Mar 14, 2023 at 7:01 PM Orie Steele <orie@transmute.industries>
wrote:

> Inline:
>
> On Tue, Mar 14, 2023 at 1:40 PM John Henderson <
> john.henderson@energyweb.org> wrote:
>
>> Who has implemented the "vc-api exchange endpoints" or the "vc-api prove
>>> endpoint"?
>>
>>
>> Energy Web also has an implementation of the both VC-API exchanges
>> endpoints (
>> https://github.com/energywebfoundation/ssi/blob/cb923a1cbbd0c274917d3fed1281db2cc0a8b260/apps/vc-api/src/vc-api/vc-api.controller.ts#L228)
>> and the VC-API presentation prove endpoint (
>> https://github.com/energywebfoundation/ssi/blob/cb923a1cbbd0c274917d3fed1281db2cc0a8b260/apps/vc-api/src/vc-api/vc-api.controller.ts#L174
>> )
>>
>
> Thank you for these links, this is exactly what I was hoping to find.
>
> Do you know how many other implementations are interoperable with yours?
>
> It seems you have a reasonable number of related endpoints marked "A
> NON-STANDARD endpoint currently."
>
> We have the same issue.
>
> The problem it creates is the following:
>
> 1. we don't want to invest in testing "non standard based interop".
> 2. we cannot get consensus to add these endpoints to "standard based
> interop".
>
> classic chicken or egg.
>
> We could add your endpoints to the traceability api profile, and replace
> the ones we have today.
>
> This is why we are asking for evidence of implementation of the exchanges
> endpoints.
>
> We are willing to write the tests, if they connect to some existing value
> pool, or we are highly confident that they will bootstrap such a pool.
>
> It seems your implementation supports JWTs as well.
>
> This is excellent news, since we are interested in JWT based exchange
> endpoint flows.
>
> Do you know how many implementers have demonstrated interoperability for
> JWT based exchange endpoints?
>
>
>>
>> Great conversation, always good to learn more about the different
>> specifications and implementations out there.
>>
>> Thanks,
>>
>> John Henderson
>> Energy Web
>>
>>
>>
>>
>> On Tue, Mar 14, 2023 at 5:30 PM Ganesh Annan <gannan@digitalbazaar.com>
>> wrote:
>>
>>> On Tue, Mar 14, 2023 at 12:29 PM Orie Steele <orie@transmute.industries>
>>> wrote:
>>>
>>>> My question is:
>>>>
>>>> Does the chapi playground use the exchange endpoints:
>>>>
>>>> - https://w3c-ccg.github.io/vc-api/#exchange-discovery
>>>>
>>>
>>> Yes, we use the exchanges endpoint.
>>>
>>>
>>>> Or the prove endpoint:
>>>>
>>>> - https://w3c-ccg.github.io/vc-api/#prove-presentation
>>>>
>>>
>>> No, we don't use the prove endpoint and currently don't have plans to.
>>>
>>>
>
> --
> *ORIE STEELE*
> Chief Technical Officer
> www.transmute.industries
>
> <https://www.transmute.industries>
>