{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://git.eeqj.de/sneak/chat/schema/s2c/pong.json",
  "title": "S2C Pong",
  "description": "Keepalive response to a client ping.",
  "type": "object",
  "properties": {
    "id": {
      "type": "integer"
    },
    "type": {
      "const": "pong"
    },
    "ts": {
      "type": "string",
      "format": "date-time"
    },
    "token": {
      "type": "string",
      "description": "Echoed token from the client's ping, if provided."
    }
  },
  "required": ["id", "type", "ts"]
}