Support latest OID4VP requirements: DCQL with updated path syntax

[pstamatop]

Current Limitations

DCQL Support

There is currently support for presentation requests based on the older OID4VP drafts that used Presentation Exchange (presentation_definition with input_descriptors) but from later drafts onward (Draft 26), the spec removes PEX and introduces DCQL queries which are not currently supported.

Updated Path Syntax

Additionally, only PEX-style JSONPath path values are supported today.
Example: (Draft 20 syntax)

"path": ["$['org.iso.18013.5.1']['family_name']"]

Internally, prepareDigest() enforces this format using regex:

const [[_1, nameSpace], [_2, elementIdentifier]] = [...path.matchAll(/\['(.*?)'\]/g)];

However, newer OID4VP drafts have moved away from JSONPath and now define path as a direct ordered list of keys:
Example: Latest OpenID4VP v1.0 syntax

"path": ["org.iso.18013.5.1", "first_name"]

This path syntax fails with current parsing during digest preparation

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Proposed Solution

• Add DCQL query support alongside existing Presentation Definition support:

  • New usingDcqlQuery()
  • Extend sign() to process dcql_query.credentials as well

• Extend namespace preparation to work for both:

  • constraints.fields (Presentation Definition)
  • claims (DCQL)

• Update path resolution (prepareDigest) to support two formats:

  • Legacy JSONPath string ("$['org.iso.18013.5.1']['family_name']")
  • New array form (["org.iso.18013.5.1", "family_name"])

• Add DCQL tests using sample queries

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I’m happy to submit a PR addressing this, if you think the proposed approach makes sense.

[flaviodelgrosso]

We recently came across this issue and were wondering if this PR #67 will be addressed soon. Thanks

[siacomuzzi]

@pstamatop @flaviodelgrosso
In all honesty, I’d recommend forking this repo and continuing it on your own. Currently, we just don't have the time or resources to give the PRs and issues the attention they deserve.
Apologies for the inconvenience.

[TimoGlastra]

Hey @flaviodelgrosso

If you want to use DCQL with mDL, the following libraries may be of help:

• @animo/mdoc - fork of this library, but updated to work with OpenID4VP 1.0 (will be moved to OpenWallet Foundation soon)
• dcql - implementation of DCQL
• https://github.com/verifiablestech/request-converter - Will probably be moved to OWF soon as well - shows how to use with DCQL/mdoc libraries