E-wallet with different type od currency exchange. -- 2

I want E-wallet with 1 admin panel and 2 user android app with currency exchange rate plans system. All transactions need a track and trace system with complete reports and profit. Admin panel create customer user and set price list of country currency and add wallet balance with deduct system for customer. Admin panel create vendor user and set price list and add wallet balance. Admins have all transaction track system when it’s created when vendor accept and upload pic all record. Admin panel separate report function where he can see profit and loss. Total transaction Amount with exchange price all that. Admins create a rate list of the same country with different exchange rates, also set fixed fees and apply a rate list on each customer. Admin also write buy and sell rate on each price list the difference between is profit which shows in reports will 100% [login to view URL] reports for balance added in wallets . 1 user app for customers. Where he can create transaction write amount automatically multiply by exchange rate with fee show exchange amount and send to vendor when click to send balance will deduct from wallet. Customer user also have all type of reports related to his account like wallet balance report total transaction same as bank statement with dates (from to). 2 Vendor User. Where vendor received that transaction from customer and click accept and upload proof (pic) of transaction and change status to complete transaction the amount of transaction will also deduct from his wallet balance. vendors also have all kinds of reports same as customer. Need Strong Coding because it’s related to Finance. All calculations need 200% accuracy.