SysvarClock

type SysvarClock = Readonly<{
  epoch: Epoch;
  epochStartTimestamp: UnixTimestamp;
  leaderScheduleEpoch: Epoch;
  slot: Slot;
  unixTimestamp: UnixTimestamp;
}>;

Contains data on cluster time, including the current slot, epoch, and estimated wall-clock Unix timestamp. It is updated every slot.