​Upstream Firebase User Auth Policy

This policy adds a Firebase user token to the outgoing Authentication header allowing requests to Firebase using the provided user's permissions.

​Configuration

The configuration shows how to configure the policy in the 'policies.json' document.

{
  "name": "my-upstream-firebase-user-auth-inbound-policy",
  "policyType": "upstream-firebase-user-auth-inbound",
  "handler": {
    "export": "UpstreamFirebaseUserAuthInboundPolicy",
    "module": "$import(@zuplo/runtime)",
    "options": {
      "developerClaims": {
        "premium": true
      },
      "expirationOffsetSeconds": 300,
      "serviceAccountJson": "$env(SERVICE_ACCOUNT_JSON)",
      "tokenRetries": 3,
      "userId": "1234",
      "webApiKey": "$env(WEB_API_KEY)"
    }
  }
}

​Policy Configuration

• name <string> - The name of your policy instance. This is used as a reference in your routes.
• policyType <string> - The identifier of the policy. This is used by the Zuplo UI. Value should be upstream-firebase-user-auth-inbound.
• handler.export <string> - The name of the exported type. Value should be UpstreamFirebaseUserAuthInboundPolicy.
• handler.module <string> - The module containing the policy. Value should be $import(@zuplo/runtime).
• handler.options <object> - The options for this policy. See Policy Options below.

​Policy Options

The options for this policy are specified below. All properties are optional unless specifically marked as required.

• serviceAccountJson (required) <string> - The Google Service Account key in JSON format. Note you can load this from environment variables using the $env(ENV_VAR) syntax.
• userId <string> - The userId to use as the custom token's subject.
• userIdPropertyPath <string> - The property on the incoming request.user object to retrieve the value of the userId.
• developerClaims <object> - Additional claims to include in the custom token's payload.
• webApiKey (required) <string> - The Firebase Web API Key (found in project settings)
• tokenRetries <number> - The number of times to retry fetching the token in the event of a failure. Defaults to 3.
• expirationOffsetSeconds <number> - The number of seconds less than the token expiration to cache the token. Defaults to 300.

​Using the Policy

Read more about how policies work