{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "type": "object",
  "additionalProperties": false,
  "required": [],
  "properties": {
    "subsystem": {
      "type": "string",
      "enum": [
        "succeededforwards",
        "failedforwards",
        "succeededpays",
        "failedpays",
        "paidinvoices",
        "expiredinvoices"
      ],
      "description": "What subsystem to ask about"
    }
  }
}