Twispay sample code for C#

Sample code for generating a HTML form for a Twispay order:

// sample data contains order parameters
object orderData = new
{
   siteId = 1,
   customer = new
   {
       identifier = "external-user-id",
       firstName = "John ",
       lastName = "Doe",
       country = "US",
       state = "NY",
       city = "New York",
       address = "1st Street",
       zipCode = "11222",
       phone = "0012120000000",
       email = "[email protected]"
   },
   order = new
   {
       orderId = "external-order-id",
       type = "purchase",
       amount = 2194.99,
       currency = "USD",
       description = "1 year subscription on site"
   },
   cardTransactionMode = "authAndCapture",
   invoiceEmail = "[email protected]",
   backUrl = "http://google.com"
};

// your secret key
string secretKey = "cd07b3c95dc9a0c8e9318b29bdc13b03";

// TRUE for Twispay live site, otherwise Twispay stage will be used
bool twispayLive = false;

// get the HTML form
string base64JsonRequest = Twispay.GetBase64JsonRequest(orderData);
string base64Checksum = Twispay.GetBase64Checksum(orderData, Encoding.ASCII.GetBytes(secretKey));
string hostName = twispayLive ? "secure.twispay.com" : "secure-stage.twispay.com";
string htmlForm = @"<form action=""https://""" + hostName + @""""" method=""post"" accept-charset=""UTF-8"">
    <input type=""hidden"" name=""jsonRequest"" value=""" + base64JsonRequest + @""">
    <input type=""hidden"" name=""checksum"" value=""" + base64Checksum + @""">
    <input type=""submit"" value=""Pay"">
    </form>";

Sample code for decrypting the Twispay IPN response:

// normally you get the encrypted data from the HTTP request (POST/GET) in the `opensslResult` parameter
string encryptedIpnResponse = "oUrO8wW0IXK1yj9F8RYbHw==,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";

// your secret key
string secretKey = "cd07b3c95dc9a0c8e9318b29bdc13b03";

// get the IPN response
object response = Twispay.DecryptIpnResponse(encryptedIpnResponse, Encoding.ASCII.GetBytes(secretKey));

Run the sample code from the command line with Mono:

• execute nuget install, msbuild order.csproj and mono bin/Debug/order.exe to generate and output the HTML form for a Twispay order;
• execute nuget install, msbuild ipn.csproj and mono bin/Debug/ipn.exe to decrypt and output the received data from a IPN call.