QR Code Scanner Payment Making App

Payment will be made in Milestones. Don't ask anything in advance. I'll first take your interview, Will decide to give you the project or not. After that I'll award you the project and create a milestone of 25% first. After you completing the 25% work, I'll release the first milestone. Source code of this app will be my property and it must be handed over to me without any questions in perfectly working condition only. It's backend should be on firebase. There should be Customer Panel. There should be merchant panel on mobile and Web. There should be admin panel on web. There should be universal QR Code Scanner API integration in the app. There should be Google Map API integration in the app to show users that our partner stores are available in this area in this city at this distance. There should be Customer care panel on admin panel. Whenever any customer will raise any ticket, a ticket number should be generated and will be shared with customer and admin or concerned department. When concerned department or staff will act on that ticket, a notification should be sent to buyer and admin or concerned department panel that this person did this activity on this ticket at this time or date. Admin or customer can close the ticket anytime with mandatory response. Signup should be done by Mobile and Email verification only. Some points are left in this project, that will be shared while your interview. Unlimited revisions will be allowed in this project. We want that when we go to mall then instead of staying in Queue for making payment, at the the time of watching any item and before keeping in basket, buyer should open our app, scan the item, add to cart and when all the items are scanned and then we must proceed to checkout and then a bill should be generated with a QR code having all the information and then we go to nearby QR code scanning machine, scan our bill and a hard copy should be generated and a pdf should be sent on our email. Then bill and items to be verified with guard their and we checkout. All the discounts and GST should be calculated automatically as per store or showroom requirements. All the transactions should be stored on our server in our admin panel and store panel. All the transactions can be viewed by admin or store owner anytime. All the stores and customers must be given a unique i.d If you can develop such solution only then contact me.