Coupon Voucher Redeem on wordpress platform

Well, .....All story begin at the local shop on cash-register where is genereted voucher with specific code with value lets say 100 usd.... now the customer must gone to website, where can redeem this generated code and get a bitcoin for that 100 usd on the currently value on the market in own bitcoin wallet... Genereted voucher with specific code from shop will be send to database of this website ,so customer with valid code came on the website and can redeem voucher for bitcoins... If you think you can integrate suitable API on the wordpress or any other platform, please let me know, reference page is [login to view URL] and [login to view URL] or [login to view URL] please come with your offer and tell how will be done....