Barcode Scanner app

React Native preferred for my own purposes, but another solution is also possible, because i am in the time pressure :) Quick note how to build the project to apk is expected. I want to make some barcode inventory in my clients offices. I need app for barcode scanning to text file (offline) and on request, typicaly once a day send the text file to my server with https POST. The app will have three "pages". SCAN/SETTINGS/SEND SCAN will show barcode scanning window, button for scan and scanned text preview with possibility to delete last scanned code. The code will be always just 2D "Code 128". There is no need for any validity checking in app - i have done this next on server. SETTINGS will be for adding username (6 digit) and password - this info will be later added to the text file which will be shipped to server. SEND will have only one button. Check if internet is available. If yes, show the button. After pressing, the password will be added to the end of the text file with scanned codes and the text file will be posted to https with POST method. Server address will be hardcoded. The server will respond OK or ERR and it should be visible on the SEND "page" as confirmation of successfull send. If successfull, delete the text file from mobile. The text file format will be provided. It wil be come sort of CSV, each scan to separate line with date, time etc.