Issues with Samples/transfer/streaming /streaming-01-http-to-http/ contract negotiation

[Silhim]

Hello,

I have issues managing the contract negotiation in the first streaming sample. I copy the odrl:hasPolicy/@id as it is in the catalog fetch into the negotiate-contract.json like this:

{
  "@id": "stream-asset",
  "@type": "dcat:Dataset",
  "odrl:hasPolicy": {
    "@id": "Y29udHJhY3QtZGVmaW5pdGlvbg==:c3RyZWFtLWFzc2V0:NmU0NWE5NTAtZDE2MS00OGY4LWE0MjctZTM0MDAxMjQxODM1",
    "@type": "odrl:Set",
    "odrl:permission": [],
    "odrl:prohibition": [],
    "odrl:obligation": [],
    "odrl:target": {
      "@id": "stream-asset"
    }
  },
  "dcat:distribution": {
    "@type": "dcat:Distribution",
    "dct:format": {
      "@id": "HttpData"
    },
    "dcat:accessService": "037a5c79-7c72-4578-ac17-43e9e4995c04"
  },
  "id": "stream-asset",
  "@context": {
    "@vocab": "https://w3id.org/edc/v0.0.1/ns/",
    "edc": "https://w3id.org/edc/v0.0.1/ns/",
    "dcat": "https://www.w3.org/ns/dcat/",
    "dct": "https://purl.org/dc/terms/",
    "odrl": "http://www.w3.org/ns/odrl/2/",
    "dspace": "https://w3id.org/dspace/v0.8/"
  }
}

{
  "@context": {
    "@vocab": "https://w3id.org/edc/v0.0.1/ns/",
    "odrl": "http://www.w3.org/ns/odrl/2/"
  },
  "@type": "NegotiationInitiateRequestDto",
  "counterPartyAddress": "http://localhost:18182/protocol",
  "providerId": "provider",
  "protocol": "dataspace-protocol-http",
  "policy": {
    "@id": "Y29udHJhY3QtZGVmaW5pdGlvbg==:c3RyZWFtLWFzc2V0:ZmVkM2JmNzUtMTRjYS00NzAyLWFlMWYtZjk5NzhmYTg5YTZh",
    "@type": "use",
    "odrl:permission": [],
    "odrl:prohibition": [],
    "odrl:obligation": [],
    "odrl:target": "stream-asset"
}
}

Then I send the negotiate-contract.json to the provider like in the tutorial like this
curl -H 'Content-Type: application/json' -d @transfer/streaming/streaming-01-http-to-http/negotiate-contract.json -X POST "http://localhost:28181/management/v2/contractnegotiations" -s | jq

but i get this error message:

[
  {
    "message": "https://w3id.org/edc/v0.0.1/ns/policy/http://www.w3.org/ns/odrl/2/target/@id cannot be null or blank",
    "type": "ValidationFailure",
    "path": "https://w3id.org/edc/v0.0.1/ns/policy/http://www.w3.org/ns/odrl/2/target/@id",
    "invalidValue": null
  }
]

Please help.

Thanks in advance
Greetings Traveler

[Silhim]

Ok, I checked up on the API Docs and compared the provided negotiate-contract.json file with the example body of the docs. I just took over the policy part:

"policy": {
    "@context": "http://www.w3.org/ns/odrl.jsonld",
    "@type": "Set",
    "@id": "policy-id",
    "permission": [],
    "prohibition": [],
    "obligation": [],
    "target": "assetId"
  }

so that my new negotiate-contract.json looks like this:

{
  "@context": {
    "@vocab": "https://w3id.org/edc/v0.0.1/ns/",
    "odrl": "http://www.w3.org/ns/odrl/2/"
  },
  "@type": "NegotiationInitiateRequestDto",
  "counterPartyAddress": "http://localhost:18182/protocol",
  "providerId": "provider",
  "protocol": "dataspace-protocol-http",
  "policy": {
    "@context": "http://www.w3.org/ns/odrl.jsonld",
    "@type": "Set",
    "@id": "Y29udHJhY3QtZGVmaW5pdGlvbg==:c3RyZWFtLWFzc2V0:YzU2OTE2N2ItOWFkYS00M2JiLWI4MGUtOGVhOGM1OGY3NWI1",
    "permission": [],
    "prohibition": [],
    "obligation": [],
    "target": "assetId"
}
}

With the json like this I get a successful response:

root@network-one-f9863aa1-c21c-419c-a7fc-c5d99fabbfee:/home/operation/edcStreaming/Samples# curl -H 'Content-Type: application/json' -d @transfer/streaming/streaming-01-http-to-http/negotiate-contract.json  -X POST "http://localhost:28181/management/v2/contractnegotiations" -s | jq
{
  "@type": "IdResponse",
  "@id": "63ff9e84-fd56-4ef2-842f-0fbd0784936f",
  "createdAt": 1707817214861,
  "@context": {
    "@vocab": "https://w3id.org/edc/v0.0.1/ns/",
    "edc": "https://w3id.org/edc/v0.0.1/ns/",
    "odrl": "http://www.w3.org/ns/odrl/2/"
  }
root@network-one-f9863aa1-c21c-419c-a7fc-c5d99fabbfee:/home/operation/edcStreaming/Samples# curl "http://localhost:28181/management/v2/contractnegotiations/63ff9e84-fd56-4ef2-842f-0fbd0784936f" -s | jq
{
  "@type": "ContractNegotiation",
  "@id": "63ff9e84-fd56-4ef2-842f-0fbd0784936f",
  "type": "CONSUMER",
  "protocol": "dataspace-protocol-http",
  "state": "FINALIZED",
  "counterPartyId": "provider",
  "counterPartyAddress": "http://localhost:18182/protocol",
  "callbackAddresses": [],
  "createdAt": 1707817214861,
  "contractAgreementId": "61d19639-695f-438f-b1e7-1aa1715ffc6d",
  "@context": {
    "@vocab": "https://w3id.org/edc/v0.0.1/ns/",
    "edc": "https://w3id.org/edc/v0.0.1/ns/",
    "odrl": "http://www.w3.org/ns/odrl/2/"
  }
}

The next issue I'm facing is that after I give the command to start the tranfer with curl -H 'Content-Type: application/json' -d @transfer/streaming/streaming-01-http-to-http/transfer.json -X POST "http://localhost:28181/management/v2/transferprocesses" -s | jq the consumer is giving me this issue:

DEBUG 2024-02-13T10:54:14.490633763 [TransferProcessManagerImpl] TransferProcess e87721cd-d975-451a-8b64-3a64d48b9bf2 is now in state INITIAL
DEBUG 2024-02-13T10:54:14.491222821 Process e87721cd-d975-451a-8b64-3a64d48b9bf2 is now INITIAL
DEBUG 2024-02-13T10:54:14.491465635 Transfer Process created e87721cd-d975-451a-8b64-3a64d48b9bf2
WARNING 2024-02-13T10:54:14.656390551 Policy not found for contract: 63ff9e84-fd56-4ef2-842f-0fbd0784936f
DEBUG 2024-02-13T10:54:14.657017372 [TransferProcessManagerImpl] TransferProcess e87721cd-d975-451a-8b64-3a64d48b9bf2 is now in state TERMINATED

The policy has not been found for contract.
Any ideas?

Best regards!

[Silhim]

Ok, the policy has not been found for contract because Im stupid. Realized that I had the @policy/type set to "Set". It needs to be set to "use" like we defined it. Now it works!