Different Responses with different Accept Headers

[solidnerd]

Hey,

we stumbled across a breaking change and want to ask if this is intended. Currently when you don't set the Accept
Header to */* we get different results back from the uni-resolver.

Example with * / *

curl -sSL https://dev.uniresolver.io/1.0/identifiers/did:elem:EiAS3mqC4OLMKOwcz3ItIL7XfWduPT7q3Fa4vHgiCfSG2A | jq

{
  "didResolutionMetadata": {
    "pattern": "^did:elem:(.+)$",
    "driverUrl": "https://element-did.com/api/v1/sidetree/$1",
    "duration": 1518,
    "contentType": "application/did+json",
    "did": {
      "methodSpecificId": "EiAS3mqC4OLMKOwcz3ItIL7XfWduPT7q3Fa4vHgiCfSG2A",
      "method": "elem"
    }
  },
  "didDocumentMetadata": {},
  "didDocument": {
    "keyAgreement": [
      {
        "publicKeyBase58": "ENpfk9K9J6uss5qu6BrAszioE732mYCobmMPSpvB3faM",
        "id": "did:elem:ropsten:EiAS3mqC4OLMKOwcz3ItIL7XfWduPT7q3Fa4vHgiCfSG2A#keyAgreement",
        "type": "X25519KeyAgreementKey2019",
        "usage": "signing",
        "controller": "did:elem:ropsten:EiAS3mqC4OLMKOwcz3ItIL7XfWduPT7q3Fa4vHgiCfSG2A"
      }
    ],
    "@context": "https://w3id.org/did/v1",
    "publicKey": [
      {
        "publicKeyHex": "0361f286ada2a6b2c74bc6ed44a71ef59fb9dd15eca9283cbe5608aeb516730f33",
        "id": "did:elem:ropsten:EiAS3mqC4OLMKOwcz3ItIL7XfWduPT7q3Fa4vHgiCfSG2A#primary",
        "type": "Secp256k1VerificationKey2018",
        "usage": "signing",
        "controller": "did:elem:ropsten:EiAS3mqC4OLMKOwcz3ItIL7XfWduPT7q3Fa4vHgiCfSG2A"
      },
      {
        "id": "did:elem:ropsten:EiAS3mqC4OLMKOwcz3ItIL7XfWduPT7q3Fa4vHgiCfSG2A#recovery",
        "usage": "recovery",
        "type": "Secp256k1VerificationKey2018",
        "publicKeyHex": "02c00982681081372cbb941cd2c9745908316e1373ac333479f0deabcad0e9d574",
        "controller": "did:elem:ropsten:EiAS3mqC4OLMKOwcz3ItIL7XfWduPT7q3Fa4vHgiCfSG2A"
      },
      {
        "type": "Ed25519VerificationKey2018",
        "id": "did:elem:ropsten:EiAS3mqC4OLMKOwcz3ItIL7XfWduPT7q3Fa4vHgiCfSG2A#edv",
        "publicKeyBase58": "atEBuHypSkQx7486xT5FUkoBLqvNcWyNK2Xz9EPjdMy",
        "usage": "signing",
        "controller": "did:elem:ropsten:EiAS3mqC4OLMKOwcz3ItIL7XfWduPT7q3Fa4vHgiCfSG2A"
      },
      {
        "id": "did:elem:ropsten:EiAS3mqC4OLMKOwcz3ItIL7XfWduPT7q3Fa4vHgiCfSG2A#delegate",
        "publicKeyPem": "-----BEGIN PUBLIC KEY\nMIIBCgKCAQEAvzoCEC2rpSpJQaWZbUmlsDNwp83Jr4fi6KmBWIwnj1MZ6CUQ7rBa\nsuLI8AcfX5/10scSfQNCsTLV2tMKQaHuvyrVfwY0dINk+nkqB74QcT2oCCH9XduJ\njDuwWA4xLqAKuF96FsIes52opEM50W7/W7DZCKXkC8fFPFj6QF5ZzApDw2Qsu3yM\nRmr7/W9uWeaTwfPx24YdY7Ah+fdLy3KN40vXv9c4xiSafVvnx9BwYL7H1Q8NiK9L\nGEN6+JSWfgckQCs6UUBOXSZdreNN9zbQCwyzee7bOJqXUDAuLcFARzPw1EsZAyjV\ntGCKIQ0/btqK+jFunT2NBC8RItanDZpptQIDAQAB\nEND PUBLIC KEY-----\r\n",
        "usage": "signing",
        "type": "Secp256k1VerificationKey2018",
        "controller": "did:elem:ropsten:EiAS3mqC4OLMKOwcz3ItIL7XfWduPT7q3Fa4vHgiCfSG2A"
      },
      {
        "id": "did:elem:ropsten:EiAS3mqC4OLMKOwcz3ItIL7XfWduPT7q3Fa4vHgiCfSG2A#key-JUvpllMEYUZ2joO59UNui_XYDqxVqiFLLAJ8klWuPBw",
        "publicKeyJwk": {
          "x": "dWCvM4fTdeM0KmloF57zxtBPXTOythHPMm1HCLrdd3A",
          "crv": "secp256k1",
          "y": "36uMVGM7hnw-N6GnjFcihWE3SkrhMLzzLCdPMXPEXlA",
          "kid": "JUvpllMEYUZ2joO59UNui_XYDqxVqiFLLAJ8klWuPBw",
          "kty": "EC"
        },
        "usage": "signing",
        "type": "Ed25519VerificationKey2018",
        "controller": "did:elem:ropsten:EiAS3mqC4OLMKOwcz3ItIL7XfWduPT7q3Fa4vHgiCfSG2A"
      }
    ],
    "capabilityDelegation": [
      "did:elem:ropsten:EiAS3mqC4OLMKOwcz3ItIL7XfWduPT7q3Fa4vHgiCfSG2A#edv"
    ],
    "service": [
      {
        "serviceEndpoint": "https://openid.example.com/",
        "type": "OpenIdConnectVersion1.0Service",
        "id": "did:elem:ropsten:EiAS3mqC4OLMKOwcz3ItIL7XfWduPT7q3Fa4vHgiCfSG2A#openid"
      }
    ],
    "capabilityInvocation": [
      "did:elem:ropsten:EiAS3mqC4OLMKOwcz3ItIL7XfWduPT7q3Fa4vHgiCfSG2A#edv"
    ],
    "assertionMethod": [
      "did:elem:ropsten:EiAS3mqC4OLMKOwcz3ItIL7XfWduPT7q3Fa4vHgiCfSG2A#edv"
    ],
    "authentication": [
      "did:elem:ropsten:EiAS3mqC4OLMKOwcz3ItIL7XfWduPT7q3Fa4vHgiCfSG2A#edv",
      {
        "type": "Ed25519VerificationKey2018",
        "usage": "signing",
        "id": "did:elem:ropsten:EiAS3mqC4OLMKOwcz3ItIL7XfWduPT7q3Fa4vHgiCfSG2A#authentication",
        "publicKeyBase58": "H3C2AVvLMv6gmMNam3uVAjZpfkcJCwDwnZn6z3wXmqPV",
        "controller": "did:elem:ropsten:EiAS3mqC4OLMKOwcz3ItIL7XfWduPT7q3Fa4vHgiCfSG2A"
      }
    ],
    "id": "did:elem:ropsten:EiAS3mqC4OLMKOwcz3ItIL7XfWduPT7q3Fa4vHgiCfSG2A"
  }
}

Example with application/json

curl -sSL -H "Accept: application/json" https://dev.uniresolver.io/1.0/identifiers/did:elem:EiAS3mqC4OLMKOwcz3ItIL7XfWduPT7q3Fa4vHgiCfSG2A | jq

{
  "authentication": [
    "did:elem:ropsten:EiAS3mqC4OLMKOwcz3ItIL7XfWduPT7q3Fa4vHgiCfSG2A#edv",
    {
      "type": "Ed25519VerificationKey2018",
      "usage": "signing",
      "id": "did:elem:ropsten:EiAS3mqC4OLMKOwcz3ItIL7XfWduPT7q3Fa4vHgiCfSG2A#authentication",
      "publicKeyBase58": "H3C2AVvLMv6gmMNam3uVAjZpfkcJCwDwnZn6z3wXmqPV",
      "controller": "did:elem:ropsten:EiAS3mqC4OLMKOwcz3ItIL7XfWduPT7q3Fa4vHgiCfSG2A"
    }
  ],
  "assertionMethod": [
    "did:elem:ropsten:EiAS3mqC4OLMKOwcz3ItIL7XfWduPT7q3Fa4vHgiCfSG2A#edv"
  ],
  "keyAgreement": [
    {
      "id": "did:elem:ropsten:EiAS3mqC4OLMKOwcz3ItIL7XfWduPT7q3Fa4vHgiCfSG2A#keyAgreement",
      "usage": "signing",
      "type": "X25519KeyAgreementKey2019",
      "publicKeyBase58": "ENpfk9K9J6uss5qu6BrAszioE732mYCobmMPSpvB3faM",
      "controller": "did:elem:ropsten:EiAS3mqC4OLMKOwcz3ItIL7XfWduPT7q3Fa4vHgiCfSG2A"
    }
  ],
  "@context": "https://w3id.org/did/v1",
  "capabilityDelegation": [
    "did:elem:ropsten:EiAS3mqC4OLMKOwcz3ItIL7XfWduPT7q3Fa4vHgiCfSG2A#edv"
  ],
  "service": [
    {
      "serviceEndpoint": "https://openid.example.com/",
      "id": "did:elem:ropsten:EiAS3mqC4OLMKOwcz3ItIL7XfWduPT7q3Fa4vHgiCfSG2A#openid",
      "type": "OpenIdConnectVersion1.0Service"
    }
  ],
  "publicKey": [
    {
      "publicKeyHex": "0361f286ada2a6b2c74bc6ed44a71ef59fb9dd15eca9283cbe5608aeb516730f33",
      "id": "did:elem:ropsten:EiAS3mqC4OLMKOwcz3ItIL7XfWduPT7q3Fa4vHgiCfSG2A#primary",
      "type": "Secp256k1VerificationKey2018",
      "usage": "signing",
      "controller": "did:elem:ropsten:EiAS3mqC4OLMKOwcz3ItIL7XfWduPT7q3Fa4vHgiCfSG2A"
    },
    {
      "id": "did:elem:ropsten:EiAS3mqC4OLMKOwcz3ItIL7XfWduPT7q3Fa4vHgiCfSG2A#recovery",
      "publicKeyHex": "02c00982681081372cbb941cd2c9745908316e1373ac333479f0deabcad0e9d574",
      "usage": "recovery",
      "type": "Secp256k1VerificationKey2018",
      "controller": "did:elem:ropsten:EiAS3mqC4OLMKOwcz3ItIL7XfWduPT7q3Fa4vHgiCfSG2A"
    },
    {
      "usage": "signing",
      "type": "Ed25519VerificationKey2018",
      "publicKeyBase58": "atEBuHypSkQx7486xT5FUkoBLqvNcWyNK2Xz9EPjdMy",
      "id": "did:elem:ropsten:EiAS3mqC4OLMKOwcz3ItIL7XfWduPT7q3Fa4vHgiCfSG2A#edv",
      "controller": "did:elem:ropsten:EiAS3mqC4OLMKOwcz3ItIL7XfWduPT7q3Fa4vHgiCfSG2A"
    },
    {
      "publicKeyPem": "-----BEGIN PUBLIC KEY\nMIIBCgKCAQEAvzoCEC2rpSpJQaWZbUmlsDNwp83Jr4fi6KmBWIwnj1MZ6CUQ7rBa\nsuLI8AcfX5/10scSfQNCsTLV2tMKQaHuvyrVfwY0dINk+nkqB74QcT2oCCH9XduJ\njDuwWA4xLqAKuF96FsIes52opEM50W7/W7DZCKXkC8fFPFj6QF5ZzApDw2Qsu3yM\nRmr7/W9uWeaTwfPx24YdY7Ah+fdLy3KN40vXv9c4xiSafVvnx9BwYL7H1Q8NiK9L\nGEN6+JSWfgckQCs6UUBOXSZdreNN9zbQCwyzee7bOJqXUDAuLcFARzPw1EsZAyjV\ntGCKIQ0/btqK+jFunT2NBC8RItanDZpptQIDAQAB\nEND PUBLIC KEY-----\r\n",
      "type": "Secp256k1VerificationKey2018",
      "usage": "signing",
      "id": "did:elem:ropsten:EiAS3mqC4OLMKOwcz3ItIL7XfWduPT7q3Fa4vHgiCfSG2A#delegate",
      "controller": "did:elem:ropsten:EiAS3mqC4OLMKOwcz3ItIL7XfWduPT7q3Fa4vHgiCfSG2A"
    },
    {
      "publicKeyJwk": {
        "kty": "EC",
        "crv": "secp256k1",
        "y": "36uMVGM7hnw-N6GnjFcihWE3SkrhMLzzLCdPMXPEXlA",
        "kid": "JUvpllMEYUZ2joO59UNui_XYDqxVqiFLLAJ8klWuPBw",
        "x": "dWCvM4fTdeM0KmloF57zxtBPXTOythHPMm1HCLrdd3A"
      },
      "usage": "signing",
      "id": "did:elem:ropsten:EiAS3mqC4OLMKOwcz3ItIL7XfWduPT7q3Fa4vHgiCfSG2A#key-JUvpllMEYUZ2joO59UNui_XYDqxVqiFLLAJ8klWuPBw",
      "type": "Ed25519VerificationKey2018",
      "controller": "did:elem:ropsten:EiAS3mqC4OLMKOwcz3ItIL7XfWduPT7q3Fa4vHgiCfSG2A"
    }
  ],
  "capabilityInvocation": [
    "did:elem:ropsten:EiAS3mqC4OLMKOwcz3ItIL7XfWduPT7q3Fa4vHgiCfSG2A#edv"
  ],
  "id": "did:elem:ropsten:EiAS3mqC4OLMKOwcz3ItIL7XfWduPT7q3Fa4vHgiCfSG2A"
}

[peacekeeper]

Hello @solidnerd , yes we have never really defined if the "default" response of the Universal Resolver should be just the DID document, or the DID resolution result (DID document + metadata). Sorry if this broke something, maybe we should have communicated this beforehand.

Are you maybe available to discuss this on the next Universal Resolver Work Item Call (Wednesday 7pm CEST)?

If you want to get just the DID document, I think the safest thing should be to explicitly request the official media type of the DID document representation, e.g. for the JSON-LD representation:

Accept: application/did+ld+json

[solidnerd]

@peacekeeper Sadly next week I can't attend since we have a lot of internal stuff to do.

But the Week afterwards seems to be fine from my side. There we can discuss it.

[peacekeeper]

@solidnerd Okay sounds good, let's discuss then. We have these Universal Resolver Work Item Calls every week.

[peacekeeper]

Related issue: #150