feat(castor): Add peerDID Create method + tests.

[elribonazo]

Overview

Integrates the PeerDID creation method in Castor + integrates basic unit testing.

Checklist

My PR contains...

• No code changes (changes to documentation, CI, metadata, etc.)
• Bug fixes (non-breaking change which fixes an issue)
• Improvements (misc. changes to existing features)
• Features (non-breaking change which adds functionality)

[hamada147]

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[goncalo-frade-iohk]

I don't know if you want to change this as an easy improvement, I did this shit to fast to think.

But you can actually pass just a Array<KeyPair> and then replace all those if's by something like:

var encryptionKeys: List<VerificationMaterial> = emptyList()
var signingKeys: List<VerificationMaterial> = emptyList()

keyPairs.forEach {
    when (it.curve) {
           KeyCurve.ED25519 -> {
                 encryptionKeys.add(VerificationMaterialAgreement(
                     format = VerificationMaterialFormatPeerDID.MULTIBASE,
                     value = keyAgreementKeyPair.publicKey.value,
                     type = VerificationMethodTypeAgreement.X25519_KEY_AGREEMENT_KEY_2020
                 ))
           }
           KeyCurve.X25519 -> {
                 signingKeys.add(VerificationMaterialAuthentication(
                     format = VerificationMaterialFormatPeerDID.MULTIBASE,
                     value = authenticationKeyPair.publicKey.value,
                     type = VerificationMethodTypeAuthentication.ED25519_VERIFICATION_KEY_2020
                 ))
            }
            else -> { throw CastorError.InvalidKeyError() }
    }
}
val peerDID = createPeerDIDNumalgo2(
          encryptionKeys = encryptionKeys,  
          signingKeys = signingKeys,
          service = service.map {
                 Json.encodeToString(
                     DIDCommServicePeerDID(
                         id = it.id,
                         type = it.type[0],
                         serviceEndpoint = it.serviceEndpoint.uri,
                         routingKeys = listOf(),
                         accept = it.serviceEndpoint.accept?.asList() ?: listOf()
                     ).toDict().toJsonElement()
                 )
          }.first())

PS: Wrote this on the comment so not sure if it compiles.

[elribonazo]

done, u can resolve. Thanks buddy!

[goncalo-frade-iohk]

This if is really hidden logic and not so readable :D you can use higher collection functions like map and first for it to be more visible.

          service = service.map {
                 Json.encodeToString(
                     DIDCommServicePeerDID(
                         id = it.id,
                         type = it.type[0],
                         serviceEndpoint = it.serviceEndpoint.uri,
                         routingKeys = listOf(),
                         accept = it.serviceEndpoint.accept?.asList() ?: listOf()
                     ).toDict().toJsonElement()
                 )
          }.first()

[elribonazo]

done, u can resolve. Thanks buddy!