I am making a web-site for my friend who wrote several books, and we want to make it possible to sell those e-books on our website. I've tried here in Ukraine two payment systems - WayForPay and PrivatBank's LiqPay - tried adding buttons to make payments through these systems online, but they told that they require a seller to be "physical person-enterpreneur" or something like that, meaning one has to pay extra taxes monthly etc. So for us it is not acceptable as we are not enterpreneurs, we just want to sell those books. Thus we decided to try sell directly using Visa payment.
I've seen on some sites (like for paying for mobile, internet etc) that I can simply enter 16 digits of card-number (be it Visa or Mastercard, no matter), date (month/year), and secret 3-digits Card Verification Value (CVV) from back-side of bank-card, and this works fine. I want to add similar payment to our e-shop.
First question is about MasterCard cards. Does Visa payment support MasterCards? I mean, if say, buyers will input his MasterCard number (16-digits, date, CVC-code), will such card be accepted through this Visa system to accept payments to Visa-card, attached to online-shop?
And similar question is, is it possible to attach MasterCard for accepting payments, but to pay using Visa card? Or payment/selling is only possible when both buyer and seller have Visa cards? (Well, if MasterCards are not acccepted, it's not big problem, but still reduces possibilities).
Next, I'ld like to ask how to add Visa payment method to our book-shop? I am using C# (Asp.net) for website. I've downloaded C# code from https://developer.visa.com/portal/app/dashboard (JWS JWE Sample Code - C Sharp) but I have no idea how to attach this to website. I understand that there is something related to encryption, but there should be something like personal unique API-key etc, so that is attached to our shop, and somehow I have to input somewhere our Visa card number erc, so it is attached to Visa-API-key etc, so that it is all activated, and thus when user clicks "Pay" on the site (after filling all the data like bank card number, date, CVC code etc, and selecteing what he is going to buy) so that this data of who is paying and which amount he pays for what good etc is transferred to Visa server, and after successful transaction there should be something like call-back etc - some response from Visa server to our book-shop giving us notice that payment is OK (or whatever is status of payment).
Please, help to understand what I have to do to make this Visa-payment possible on our online shop.
Thank you in advance
