public PaymentResponse Pay(PaymentRequest paymentRequest, string apiUrl, string secretKey)
{
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
paymentRequest.SetSignature(secretKey);
var paymentResponse = RestCall <PaymentResponse>(apiUrl, paymentRequest,
secretKey);
if (paymentResponse.Success)
{
paymentResponse.ControlSignature(secretKey, paymentRequest.HashVersion);
}
return(paymentResponse);
}