Heartbeat - AnySport

If the server doesn’t see any heartbeat-related activity for roughly 60 seconds, it will close the connection and push:

Websocket disconnect error example

{
  "type": "error",
  "message": "heartbeat timeout"
}

Application-Level Heartbeat (Recommended)

Send one every 30 seconds. Request fields

Field	Required	Type	Notes
`code`	Required	int	Always `20010`
`trace`	Required	string	Client-generated trace ID, must not be empty
`data`	Optional	object	Not needed for heartbeats — feel free to omit it

Send heartbeat

{
  "code": 20010,
  "trace": "heartbeat-trace-id"
}

The server does not send an ack for this.

Method	Notes
WebSocket ping frame	Server replies with pong, which also resets the heartbeat timer
Any business message (subscribe/unsubscribe, etc.)	Resets the timer too, but shouldn’t be relied on as a substitute for a real heartbeat loop

Even a long-lived connection with no business traffic still needs to proactively send code: 20010.