/// <summary>
/// Validates if the postback is submitted by the client
/// </summary>
/// <param name="secret">Api secret</param>
/// <returns></returns>
public static bool IsApiSubmitted(OrderPostBack op, string secret)
{
if (op == null)
{
return(false);
}
if (string.IsNullOrEmpty(secret) || string.IsNullOrEmpty(op.order_id) || string.IsNullOrEmpty(op.order_timestamp))
{
return(false);
}
StringBuilder sb = new StringBuilder();
using (SHA256 hash = SHA256Managed.Create())
{
byte[] result = hash.ComputeHash(Encoding.UTF8.GetBytes(string.Format("{0}{1}{2}", op.order_id, op.order_timestamp, secret)));
foreach (var item in result)
{
sb.Append(item.ToString("x2"));
}
}
return(op.checksum == sb.ToString());
}
public PostbackEventArgs(OrderPostBack order)
{
this.Order = order;
}
/// <summary>
/// On new postback
/// </summary>
/// <param name="order"></param>
protected virtual void OnPostback(OrderPostBack order)
{
this.Postback?.Invoke(new PostbackEventArgs(order));
}
