Whether or not the heartbeat was acknowledged by Discord in time.
interval: number
Interval between heartbeats requested by Discord.
optional
intervalId: number
Id of the interval, which is used for sending the heartbeats.
optional
lastAck: number
Unix (in milliseconds) timestamp when the last heartbeat ACK was received from Discord.
optional
lastBeat: number
Unix timestamp (in milliseconds) when the last heartbeat was sent.
optional
rtt: number
Round trip time (in milliseconds) from Shard to Discord and back.
Calculated using the heartbeat system.
Note: this value is undefined until the first heartbeat to Discord has happened.
optional
timeoutId: number
Id of the timeout which is used for sending the first heartbeat to Discord since it's "special".