JsonWebKey Interface only for a public key? Missing private key parameter.

[bshambaugh]

Question
Why doesn't the JsonWebKey interface define the "d" parameter for a private key?

See: JSON Web Key Parameters in :
https://www.iana.org/assignments/jose/jose.xhtml

See the interface definition in:
https://github.com/decentralized-identity/did-resolver/blob/master/src/resolver.ts#L74-L86

Context:
Current Fix
For context, I was hacking around the break up the test file https://github.com/bshambaugh/did-jwt/blob/master/src/__tests__/JWT/CommonSignerTest/CommonSignerTest.ts#L20-L22

so I could import creation of the DID document as a fuction; https://github.com/bshambaugh/did-jwt/blob/master/src/__tests__/JWT/JWT.ES256Signer.test.ts#L50-L54 and https://github.com/bshambaugh/did-jwt/blob/master/src/__tests__/JWT/JWT.ES256KSigner.test.ts#L43-L47
(other changes [unrelated to this issue] were so I could avoid use of the any type)

Originally it was: https://github.com/decentralized-identity/did-jwt/blob/master/src/__tests__/JWT.test.ts#L36-L91

[mirceanis]

This parameter is intentionally omitted from the type definition to discourage unintentional publication of private key material to a DID document.
These documents are publicly resolvable so publishing a private key there never makes sense.

This does not prevent the use of key objects that contain the d property, nor any other property, since the interface is Extensible. It is only about the type seen by typescript, and IDEs.
Also, there is nothing stopping you from defining an interface that extends this with an explicit member for private key data.

[stale]

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