New requirements on past project

Backend Sever(Web App): 1. I need to add new web api. You will provide all payment details information with excel or csv. I should import this file and save all data in db. As you know, currently we use random generator for payment informations. So I need to replace this functionality newly. New api will read all payment informations from db and send response to web page and mobile app. 2. I should add new Google map page. When user click a point in vector map, he can go to this map page. Of course, this processing will be implemented by calling web api When user go to Google map page,he can see map page and his details. Mobile Ionic App: [login to view URL] needs to be Google map page same as web app Google map page. [login to view URL] needs to be Payment history page. As they receive push notifications those payments linked to that fraud consultant will be saved. they can view this info in the his history page 3.I need to implement push notification functionality. Currently, In our app ,when user receive notification , user can go to Google Map page and he can see map and details. If user open app without push, he can go to payment history page. And he click one history in this page, he can go to map page and see the map and detail. I will replace vector map with Google map. I have some questions about payment detail information. Data of xls or csv file is only for test. This data will be saved in db exactly and currently I use only data of db for displaying detail in Google map and payment history. In the future, We need to implement receiving all data from api(payment service). That is all.