[Openid-specs-ab] Issue #1651: Clarifying jwt_vp example (openid/connect)

[Sadjad Khoshkhou]

New issue 1651: Clarifying jwt_vp example
https://bitbucket.org/openid/connect/issues/1651/clarifying-jwt_vp-example

Sadjad Khoshkhou:

In the latest OIDC4VP spec, we’re supporting multiple VPs. for jwt\_vp \([https://bitbucket.org/openid/connect/src/754c4ccf28893f02f5a8b228faafb1f7e5aa5ac2/openid-4-verifiable-presentations/examples/response/vp\_token\_multiple\_vps.json#lines-50](https://bitbucket.org/openid/connect/src/754c4ccf28893f02f5a8b228faafb1f7e5aa5ac2/openid-4-verifiable-presentations/examples/response/vp_token_multiple_vps.json#lines-50)\) this example is:

```
[
    {
        "@context": [
            "https://www.w3.org/2018/credentials/v1"
        ],
        ...
        "verifiableCredential": [
            {
            ...
            }
        ],
        "id": "ebc6f1c2",
        "holder": "did:example:holder",
        "proof": {
            ...
        }
    },{
        "presentation": "eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCIsImtpZCI6ImRpZDpleGFtcGxlOmFiZmUxM2Y3MTIxMjA0MzFjMjc2ZTEyZWNhYiNrZXlzLTEifQ.eyJzdWIiOiJkaWQ6ZXhhbXBsZTplYmZlYjFmNzEyZWJjNmYxYzI3NmUxMmVjMjEiLCJqdGkiOiJodHRwOi8vZXhhbXBsZS5lZHUvY3JlZGVudGlhbHMvMzczMiIsImlzcyI6Imh0dHBzOi8vZXhhbXBsZS5jb20va2V5cy9mb28uandrIiwibmJmIjoxNTQxNDkzNzI0LCJpYXQiOjE1NDE0OTM3MjQsImV4cCI6MTU3MzAyOTcyMywibm9uY2UiOiI2NjAhNjM0NUZTZXIiLCJ2YyI6eyJAY29udGV4dCI6WyJodHRwczovL3d3dy53My5vcmcvMjAxOC9jcmVkZW50aWFscy92MSIsImh0dHBzOi8vd3d3LnczLm9yZy8yMDE4L2NyZWRlbnRpYWxzL2V4YW1wbGVzL3YxIl0sInR5cGUiOlsiVmVyaWZpYWJsZUNyZWRlbnRpYWwiLCJVbml2ZXJzaXR5RGVncmVlQ3JlZGVudGlhbCJdLCJjcmVkZW50aWFsU3ViamVjdCI6eyJkZWdyZWUiOnsidHlwZSI6IkJhY2hlbG9yRGVncmVlIiwibmFtZSI6IjxzcGFuIGxhbmc9J2ZyLUNBJz5CYWNjYWxhdXLDqWF0IGVuIG11c2lxdWVzIG51bcOpcmlxdWVzPC9zcGFuPiJ9fX19.KLJo5GAyBND3LDTn9H7FQokEsUEi8jKwXhGvoN3JtRa51xrNDgXDb0cq1UTYB-rK4Ft9YVmR1NI_ZOF8oGc_7wAp8PHbF2HaWodQIoOBxxT-4WNqAxft7ET6lkH-4S6Ux3rSGAmczMohEEf8eCeN-jC8WekdPl6zKZQj0YPB1rx6X0-xlFBs7cl6Wt8rfBP_tZ9YgVWrQmUWypSioc0MUyiphmyEbLZagTyPlUyflGlEdqrZAv6eSe6RtxJy6M1-lD7a5HTzanYTWBPAUHDZGyGKXdJw-W_x0IWChBzI8t3kpG253fg6V3tPgHeKXE94fz_QpYfg--7kLsyBAfQGbg"
    }
]
```

when the second VP decoded, it will be:

```
{
  "sub": "did:example:ebfeb1f712ebc6f1c276e12ec21",
  "jti": "http://example.edu/credentials/3732",
  "iss": "https://example.com/keys/foo.jwk",
  "nbf": 1541493724,
  "iat": 1541493724,
  "exp": 1573029723,
  "nonce": "660!6345FSer",
  "vc": {
    "@context": [
      "https://www.w3.org/2018/credentials/v1",
      "https://www.w3.org/2018/credentials/examples/v1"
    ],
    "type": [
      "VerifiableCredential",
      "UniversityDegreeCredential"
    ],
    "credentialSubject": {
      "degree": {
        "type": "BachelorDegree",
        "name": "<span lang='fr-CA'>Baccalauréat en musiques numériques</span>"
      }
    }
  }
}
```

So I have two questions:

1. shouldn’t the second object be just a `string` instead of an object? I mean something like:

```
[
    {
        "@context": [
            "https://www.w3.org/2018/credentials/v1"
        ],
        ...
        "verifiableCredential": [
            {
            ...
            }
        ],
        "id": "ebc6f1c2",
        "holder": "did:example:holder",
        "proof": {
            ...
        }
    },
    "eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCIsImtpZCI6ImRpZDpleGFtcGxlOmFiZmUxM2Y3MTIxMjA0MzFjMjc2ZTEyZWNhYiNrZXlzLTEifQ.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.KLJo5GAyBND3LDTn9H7FQokEsUEi8jKwXhGvoN3JtRa51xrNDgXDb0cq1UTYB-rK4Ft9YVmR1NI_ZOF8oGc_7wAp8PHbF2HaWodQIoOBxxT-4WNqAxft7ET6lkH-4S6Ux3rSGAmczMohEEf8eCeN-jC8WekdPl6zKZQj0YPB1rx6X0-xlFBs7cl6Wt8rfBP_tZ9YgVWrQmUWypSioc0MUyiphmyEbLZagTyPlUyflGlEdqrZAv6eSe6RtxJy6M1-lD7a5HTzanYTWBPAUHDZGyGKXdJw-W_x0IWChBzI8t3kpG253fg6V3tPgHeKXE94fz_QpYfg--7kLsyBAfQGbg"
]
```

in other examples from other specs we have similar concepts. For example [here](https://www.w3.org/TR/vc-data-model/#example-verifiable-presentation-using-jwt-compact-serialization-non-normative) we have a VerifiablePresentation jwt, which when decoded will have:

```
{
  ...
  vp: {
    verifiableCredential: [
    "eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCIsImtpZCI6ImRpZDpleGFtcGxlOmFiZmUxM2Y3MTIxMjA0MzFjMjc2ZTEyZWNhYiNrZXlzLTEifQ.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.KLJo5GAyBND3LDTn9H7FQokEsUEi8jKwXhGvoN3JtRa51xrNDgXDb0cq1UTYB-rK4Ft9YVmR1NI_ZOF8oGc_7wAp8PHbF2HaWodQIoOBxxT-4WNqAxft7ET6lkH-4S6Ux3rSGAmczMohEEf8eCeN-jC8WekdPl6zKZQj0YPB1rx6X0-xlFBs7cl6Wt8rfBP_tZ9YgVWrQmUWypSioc0MUyiphmyEbLZagTyPlUyflGlEdqrZAv6eSe6RtxJy6M1-lD7a5HTzanYTWBPAUHDZGyGKXdJw-W_x0IWChBzI8t3kpG253fg6V3tPgHeKXE94fz_QpYfg--7kLsyBAfQGbg"
    ]
  }
```

and not wrapped into a credential object like this spec. I think we should be consistent in this regard.

‌

2\. Is the jwt value incorrect and it should be something like the following:

```
eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCIsImtpZCI6ImRpZDpleGFtcGxlOjB4YWJjI2tleTEifQ.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.ft_Eq4IniBrr7gtzRfrYj8Vy1aPXuFZU-6_ai0wvaKcsrzI4JkQEKTvbJwdvIeuGuTqy7ipO-EYi7V4TvonPuTRdpB7ZHOlYlbZ4wA9WJ6mSVSqDACvYRiFvrOFmie8rgm6GacWatgO4m4NqiFKFko3r58LueFfGw47NK9RcfOkVQeHCq4btaDqksDKeoTrNysF4YS89INa-prWomrLRAhnwLOo1Etp3E4ESAxg73CR2kA5AoMbf5KtFueWnMcSbQkMRdWcGC1VssC0tB0JffVjq7ZV6OTyV4kl1-UVgiPLXUTpupFfLRhf9QpqMBjYgP62KvhIvW8BbkGUelYMetA
```

which will be decoded to:

```
{
  "iss": "did:example:ebfeb1f712ebc6f1c276e12ec21",
  "jti": "urn:uuid:3978344f-8596-4c3a-a978-8fcaba3903c5",
  "aud": "did:example:4a57546973436f6f6c4a4a57573",
  "nbf": 1541493724,
  "iat": 1541493724,
  "exp": 1573029723,
  "nonce": "343s$FSFDa-",
  "vp": {
    "@context": [
      "https://www.w3.org/2018/credentials/v1",
      "https://www.w3.org/2018/credentials/examples/v1"
    ],
    "type": [
      "VerifiablePresentation",
      "CredentialManagerPresentation"
    ],
    "verifiableCredential": [
      "eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCIsImtpZCI6ImRpZDpleGFtcGxlOmFiZmUxM2Y3MTIxMjA0MzFjMjc2ZTEyZWNhYiNrZXlzLTEifQ.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.KLJo5GAyBND3LDTn9H7FQokEsUEi8jKwXhGvoN3JtRa51xrNDgXDb0cq1UTYB-rK4Ft9YVmR1NI_ZOF8oGc_7wAp8PHbF2HaWodQIoOBxxT-4WNqAxft7ET6lkH-4S6Ux3rSGAmczMohEEf8eCeN-jC8WekdPl6zKZQj0YPB1rx6X0-xlFBs7cl6Wt8rfBP_tZ9YgVWrQmUWypSioc0MUyiphmyEbLZagTyPlUyflGlEdqrZAv6eSe6RtxJy6M1-lD7a5HTzanYTWBPAUHDZGyGKXdJw-W_x0IWChBzI8t3kpG253fg6V3tPgHeKXE94fz_QpYfg--7kLsyBAfQGbg"
    ]
  }
}
```

‌