Allow a way for users on an existing website to deposit bitcoins into the site for a balance, lets call it coins.
need to be able to sort and track new influx of bitcoins, for example you need to be able to differentiate the $50 of person 1's deposit from the $60 of person 2's, and then be able to reward the correct coin amount to the correct persons balance.
All backend, im assuming a new btc address will need to be made for each deposit, as a user requests a deposit, then deposits. Not sure what api will be used.
TO GET CHOSEN-
You need to be able to explain to me how the code works in a quick summary, and show you know what you are doing(by explaining how it will work, point to a feature in the api of a bitcoin wallet that can support this, etc.)