{
  "$id": "transaction.aggregate",
  "title": "transaction.aggregate",
  "type": "object",
  "required": ["owners", "aggregate"],
  "properties": {
    "owners": {
      "type": "array",
      "minItems": 1,
      "items": {
        "$ref": "common#/definitions/owner"
      }
    },
    "filter": {
      "$ref": "common#/definitions/filter"
    },
    "aggregate": {
      "type": "object",
      "minProperties": 1,
      "additionalProperties": {
        "type": "string",
        "enum": ["sum"]
      }
    }
  }
}