notifee.registerForegroundService(() => {
    return new Promise(async () => {
      (async function trackLocation() {

        const isTracking = await Location.hasStartedLocationUpdatesAsync(
          LOCATION_TRACKING
        );

        if (isTracking) {
          const location = await Location.getCurrentPositionAsync();
          
          let latitude = location.coords.latitude;
          let longitude = location.coords.longitude;
          let accuracy = location.coords.accuracy;

          // @a dispatch add coordinates to the coordinates array in the redux store (if accuracy is lower than 10m)
          if (accuracy <= ACCURACY) {
            if (USE_KFILTER) {
              // @a implemented incremental kalman
              var previousCorrected = JSON.parse(store.getState().previousCorrected.value)
              previousCorrected = previousCorrected ? new State({mean: previousCorrected.mean, covariance: previousCorrected.covariance, index: previousCorrected.index}) : null
              previousCorrected = kFilter.filter({previousCorrected, observation: [latitude, longitude] })
              store.dispatch(setPreviousCorrected(JSON.stringify(previousCorrected)))
              
              if (previousCorrected.index >=3) {
                store.dispatch(addCoordinates({ latitude: previousCorrected.mean[0][0], longitude: previousCorrected.mean[1][0] }));
              } else {
                //@a add non-filtered coordinates for the first 3 locations
                store.dispatch(addCoordinates({ latitude, longitude }));
              }
            } else {
              store.dispatch(addCoordinates({ latitude, longitude }));
            }    
          }

          // @a calling the function recursively with 5000ms delay
          setTimeout(() => {
            trackLocation();
          }, 5000);
        } else {
          // @a stop foreground service
          await notifee.stopForegroundService();
        }
      })();
    });
  });

  // @a set notification channel on android
  const channelId = await notifee.createChannel({
    id: "trackingLocation",
    name: "Tracking Location",
    lights: false,
    vibration: false,
    importance: AndroidImportance.HIGH,
  });

  // @a display notification for foreground service
  notifee.displayNotification({
    title: "Tracking Location",
    body: "Flyr Go is currently tracking your location.",
    android: {
      channelId,
      asForegroundService: true,
      colorized: true,
      ongoing: true,
      pressAction: {
        id: "default",
      },
    },
  });
} ```