fix: VPJWT JSON decoder in the issue-credential protocol

mercury/agent-didcommx/src/main/scala/org/hyperledger/identus/mercury/MessagingService.scala

@@ -131,6 +131,7 @@ object MessagingService {
           else didCommService.packEncrypted(msg = finalMessage, to = to)
 
         _ <- ZIO.log(s"Sending a Message to '$serviceEndpoint'")
+        _ <- ZIO.debug(s"Plain message: $msg")
         resp <- org.hyperledger.identus.mercury.HttpClient
           .postDIDComm(url = serviceEndpoint, data = encryptedMessage.string)
           .catchAll { case ex => ZIO.fail(SendMessageError(ex, Some(encryptedMessage.string))) }

pollux/core/src/main/scala/org/hyperledger/identus/pollux/core/service/CredentialServiceImpl.scala

@@ -1492,7 +1492,9 @@ class CredentialServiceImpl(
           JwtPresentation.validatePresentation(jwt, options.domain, options.challenge) match
             case ZValidation.Success(log, value) => ZIO.unit
             case ZValidation.Failure(log, error) =>
-              ZIO.fail(CredentialRequestValidationFailed("domain/challenge proof validation failed"))
+              ZIO.fail(
+                CredentialRequestValidationFailed(s"JWTPresentation validation failed: ${error.toList.mkString(";")}")
+              )
 
       clock = java.time.Clock.system(ZoneId.systemDefault)
       verificationResult <- JwtPresentation

pollux/vc-jwt/src/main/scala/org/hyperledger/identus/pollux/vc/jwt/VerifiablePresentationPayload.scala

@@ -192,6 +192,7 @@ object JwtVp {
             .map(IndexedSeq(_))
             .orElse(ctx.as[IndexedSeq[VerifiableCredentialPayload]])
         )
+        .orElse(Right(IndexedSeq.empty[VerifiableCredentialPayload]))
     } yield Json_JwtVp(context, typ, vcp)
   }
 
@@ -484,7 +485,7 @@ object JwtPresentation {
       domain: Option[String]
   ): Validation[String, Unit] = {
     if (!domain.forall(domain => decodedJwtPresentation.aud.contains(domain))) {
-      Validation.fail(s"domain/Audience dont match doamin=$domain, exp=${decodedJwtPresentation.aud}")
+      Validation.fail(s"domain/Audience dont match domain=$domain, exp=${decodedJwtPresentation.aud}")
     } else Validation.unit
   }
 

tests/integration-tests/src/test/kotlin/steps/credentials/CredentialSteps.kt

@@ -136,7 +136,15 @@ class CredentialSteps {
                 equalTo(CREDENTIAL_RECEIVED),
             ),
         )
-        holder.remember("issuedCredential", ListenToEvents.with(holder).credentialEvents.last().data)
+
+        val issueCredentialRecord = ListenToEvents.with(holder).credentialEvents.last().data
+
+        issueCredentialRecord.credential?.let {
+            println("Issued Credentials:")
+            println(it)
+        }
+
+        holder.remember("issuedCredential", issueCredentialRecord)
     }
 
     @Then("{actor} should see that credential issuance has failed")