public ActionResult StartTransaction(Order order)
{
var ACCOUNT = "375917";
var SECRET = "SAIPPUAKAUPPIAS";
var API_URL = "https://api.checkout.fi/payments";
// New payment transaction
var transaction = new PaymentTransaction();
var client = new HttpClient();
try
{
var json = JsonConvert.SerializeObject(order);
var buffer = Encoding.UTF8.GetBytes(json);
var content = new ByteArrayContent(buffer);
// Headers without signature
content.Headers.ContentType = new MediaTypeHeaderValue("application/json");
var headers = new Dictionary <string, string>();
headers.Add("checkout-account", ACCOUNT);
headers.Add("checkout-algorithm", "sha256");
headers.Add("checkout-method", "POST");
headers.Add("checkout-nonce", "564635208570151");
headers.Add("checkout-timestamp", "2018-03-08T10:02:31.904Z");
var headersStr = string.Empty;
foreach (var headeKvp in headers)
{
headersStr = string.Format("{0}{1}:{2}\n", headersStr, headeKvp.Key, headeKvp.Value);
content.Headers.Add(headeKvp.Key, headeKvp.Value);
}
var hmacPayload = string.Format("{0}{1}", headersStr, json);
var hmac = Cryptographer.CalculateHMAC(SECRET, hmacPayload);
//add signature to headers
content.Headers.Add("signature", hmac);
var response = client.PostAsync(API_URL, content);
var responseText = response.Result.Content.ReadAsStringAsync();
transaction = JsonConvert.DeserializeObject <PaymentTransaction>(responseText.Result);
}
catch (Exception ex)
{
}
return(View(transaction));
}