{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "oneOf": [
    {
      "type": "object",
      "required": [
        "ok"
      ],
      "properties": {
        "ok": {
          "const": true
        }
      }
    },
    {
      "type": "object",
      "required": [
        "error"
      ],
      "properties": {
        "error": {
          "type": "string"
        }
      }
    }
  ]
}