habitica-self-host/website/client/store/actions/notifications.js

import axios from 'axios';

export async function readNotification (store, payload) {
  let url = `api/v3/notifications/${payload.notificationId}/read`;
  let response = await axios.post(url);
  return response.data.data;
}

export async function readNotifications (store, payload) {
  let url = 'api/v3/notifications/read';
  let response = await axios.post(url, {
    notificationIds: payload.notificationIds,
  });
  return response.data.data;
}