Fix: validating same schema multiple times when it has $id

[cykoder]

AJV throws an error if you compile a schema with same ID twice. See: https://ajv.js.org/guide/managing-schemas.html

[vmidyllic]

@cykoder can you, please, add info on how to reproduce the issue? in which cases schema is compiled twice?

[cykoder]

thought it was pretty self explanitory, any schema document with an $id field will be cached by AJV. simply try use a schema document with an $id field twice with the JS-SDK and you will get an error stopping credential issuance with that schema. example: https://schema.dock.io/CourseCertificate-V1-1695036447159.json

[vmidyllic]

Thank you for your contribution.

Also, it may be helpful: while I was testing schemas you provided I encountered several issues: additionalProperties":false - this prevents the creation of credentials with credentialStatus field, as well as validation of the credentials with proof property in case it is not deleted.

Also, in the ld context there is a redefintion of protected term issuer from w3c schema. Playground example.

[cykoder]

@vmidyllic no worries, thanks for merging.

additionalProperties":false - this prevents the creation of credentials with credentialStatus field,

in this case the schema wasnt used for credentials which require it, for our platform we allow additional properties by default. but thanks for the spot.

Also, in the ld context there is a redefintion of protected term issuer from w3c schema

interesting - using the jsonld library we have there are no errors about redefined terms as it should be nested requiring the CourseCertificate type. will check that edge case out (its meant to support credentialSubject.issuer)