defer t.lastDayMu.Unlock()

	if _, ok := t.lastDayStats[tier]; !ok {
		t.lastDayStats[tier] = &lastDayTierStats{}
	}
	t.lastDayStats[tier].addStats(ts)
}

func (t *transitionState) getDailyAllTierStats() DailyAllTierStats {
	t.lastDayMu.RLock()
	defer t.lastDayMu.RUnlock()

	res := make(DailyAllTierStats, len(t.lastDayStats))
	for tier, st := range t.lastDayStats {
		res[tier] = st.clone()
	}
	return res

	errs := make([]error, len(sys.allPeerClients))
	lastDayStats := make([]DailyAllTierStats, len(sys.allPeerClients))
	var wg sync.WaitGroup
	for index := range sys.peerClients {
		if sys.peerClients[index] == nil {
			continue
		}
		wg.Add(1)
		go func(index int) {
			defer wg.Done()
			lastDayStats[index], errs[index] = sys.peerClients[index].GetLastDayTierStats(ctx)
		}(index)
	}