second to nanosecond

internal/workers/data_updater/data_updater.go

@@ -27,7 +27,7 @@ func NewDataUpdaterWC(deps Deps) *DataUpdater {
 
 func (wc *DataUpdater) Start(ctx context.Context) {
 	nextStart := calculateTime()
-	ticker := time.NewTicker(time.Second * time.Duration(nextStart))
+	ticker := time.NewTicker(time.Nanosecond * time.Duration(nextStart))
 	//ticker := time.NewTicker(10 * time.Second)
 	defer ticker.Stop()
 
@@ -36,10 +36,7 @@ func (wc *DataUpdater) Start(ctx context.Context) {
 		case <-ticker.C:
 			wc.processTasks(ctx)
 			nextStart = calculateTime()
-			if nextStart <= 0 {
+			ticker.Reset(time.Nanosecond * time.Duration(nextStart))
-				nextStart = 86400
-			}
-			ticker.Reset(time.Second * time.Duration(nextStart))
 		case <-ctx.Done():
 			return
 		}

internal/workers/data_updater/timer.go

@@ -8,13 +8,12 @@ func calculateTime() int64 {
 	now := time.Now()
 
 	targetTime := time.Date(now.Year(), now.Month(), now.Day(), 4, 0, 0, 0, now.Location())
-
 	if now.After(targetTime) {
 		targetTime = targetTime.AddDate(0, 0, 1)
 	}
 
 	toTarget := targetTime.Sub(now)
-	sec := int64(toTarget.Seconds())
+	sec := toTarget.Nanoseconds()
 
 	return sec
 }