i have project, need any one to draw a proper flow of my idea and to execute it

hi, i will describe my idea and you need to let me know flow and how you can do it or how it will work ok . there is an our hotel and peoples comes to live in for 2 days - 3 days etc. and we got some tie up around shops around the city like restaurants , pools etc. so we want when our guests visit there and they show that we are from this hotel they should give some discount and when they give discount we should come to know. that they have give discount. how much is not our need. our need is discount has been given. so we are thinking something qr based scan .. so suppose there are app with customer and app with all tie ups and they have there logins.. so customer have postcard system can see all shops tie ups where they can get discount.. so they click on that know details of that shop and small direction thumbnail to so it can guide them.. once they reach they ask that we are from this hotel and can we have discount.. so in order to do . they have to scan there qr code.. as soon they scan they got message on app and on email that you are eligible for discount some thing and as soon it scans we get message this customer has visited this restaurant or shop and avail the discount. got it. so this is how I need some thing working