Projects.GetBillingInfo does not properly take the specified project into account

[FranckVE]

Projects.GetBillingInfo does not use the specified GCP project (in my case it returned an error because the other GCP project it took in consideration did not have billing enabled).

I had to write a direct call to the Google API using the REST http request, while keeping the Application Default Credentials.

Environment details

• Programming language: GOLANG
• OS: MacOS 12.3.1
• Language runtime version: v1.17
• Package version: v1.4.0

Steps to reproduce

        gcpProjectID := "my-fifth-gcp-project"
    ctx := context.Background()
    cloudBillingManagerService, err := cloudbilling.NewService(ctx)
    if err != nil {
        fmt.Printf("err in cloudbilling.NewService\n")
        log.Fatal(err)
    }
    getProjectBillingInfo, errGetBillingInfo := cloudBillingManagerService.Projects.GetBillingInfo("projects/" + gcpProjectID).Do()
    if errGetBillingInfo != nil {
        fmt.Printf("getProjectBillingInfo %v\n", getProjectBillingInfo)
        return nil, errGetBillingInfo
    }

It would generate an error because another (other than the one specified in gcpProjectID) more recent project does not have billing enabled.

googleapi: Error 403: Cloud Billing API has not been used in project 123456789 before or it is disabled. Enable it by visiting https://console.developers.google.com/apis/api/cloudbilling.googleapis.com/overview?project=123456789 then retry. If you enabled this API recently, wait a few minutes for the action to propagate to our systems and retry.
Details:
[
  {
    "@type": "type.googleapis.com/google.rpc.Help",
    "links": [
      {
        "description": "Google developers console API activation",
        "url": "https://console.developers.google.com/apis/api/cloudbilling.googleapis.com/overview?project=123456789"
      }
    ]
  },
  {
    "@type": "type.googleapis.com/google.rpc.ErrorInfo",
    "domain": "googleapis.com",
    "metadata": {
      "consumer": "projects/123456789",
      "service": "cloudbilling.googleapis.com"
    },
    "reason": "SERVICE_DISABLED"
  }
]
, accessNotConfigured

The problem is that project "123456789" is not the project number of the project specified in gcpProjectID !

[codyoss]

What project are you running the code from? APIs will need to be enabled from the calling project. This also seems like a question for the API itself and not these clients which are auto-generated from a spec. If you have further issues I suggest reaching out with one of the options on the Cloud Billing Support Page. Hope that helps

[FranckVE]

• I am running the code from project id my-fifth-gcp-project (value set by gcloud config set project my-fifth-gcp-project and verified by a gcloud config get-value project)
• APIs are enabled on project id my-fifth-gcp-project
• I don't believe it is a problem of the API itself, since I can use both methods in direct comparison:
  • method 1, using the SDK and
  • method 2, using the http REST API.
  • For method 2, I rewrote the code calling the bare APIs http endpoints. E.g.:
    • reqToExecute, errNewReq := http.NewRequest("GET", "https://cloudbilling.googleapis.com/v1/projects/"+gcpProjectID+"/billingInfo", nil)
    • instead of getProjectBillingInfo, errGetBillingInfo := cloudBillingManagerService.Projects.GetBillingInfo("projects/" + gcpProjectID).Do()).
  • I finally got the expected result with the API (aka method 2) and the above mentioned error with method 1
• as a conclusion, I see the API is working but not the client IMHO