{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://tracking-target-constraints.example/schemas/firebase/v1/flat-event-params.json",
  "title": "Firebase Flat Event Params Constraint v1",
  "description": "Constrains Firebase event payloads to flat scalar params, with explicit support for the items array.",
  "type": "object",
  "properties": {
    "event": {
      "type": "string"
    },
    "items": {
      "type": "array",
      "items": {
        "$ref": "#/$defs/firebaseItem"
      }
    }
  },
  "additionalProperties": {
    "$ref": "#/$defs/firebaseScalar"
  },
  "$defs": {
    "firebaseScalar": {
      "type": ["string", "number", "integer", "boolean", "null"]
    },
    "firebaseItem": {
      "type": "object",
      "additionalProperties": {
        "$ref": "#/$defs/firebaseScalar"
      }
    }
  }
}