Mobile Payment App Using QR code

We are looking to get developed an app which should be capable for making payments using qr code scanning only. In this app, a facility should be available. Where customers can add some money in their mobile app account/wallet and one qr code will be allotted to them and they can go to market to purchase anything using that qr code only. The shop keeper or restaurant or showroom people will be having the same application in their mobiles. They will scan the QR code available in the mobiles of customers and payment will be done. Where no credit or debit card will be needed. No ATM swipe machines are needed. No need of carrying credit/debit cards while going out. It will be hassle free payment solution using their mobiles only. Only experienced people should bid here.