public KrakenClient()
 {
     _url     = ConfigurationManager.AppSettings["KrakenBaseAddress"];
     _version = int.Parse(ConfigurationManager.AppSettings["KrakenApiVersion"]);
     try
     {
         _key    = ConfigurationManager.AppSettings["KrakenKey"];
         _secret = ConfigurationManager.AppSettings["KrakenSecret"];
         NiveauDeVerification tier = (NiveauDeVerification)Enum.Parse(typeof(NiveauDeVerification), ConfigurationManager.AppSettings["NiveauDeVerification"]);
         ddosProtection = new DDOSProtection(tier);
     }
     catch
     {
         publicOnly = true;
         Warn();
     }
 }
        internal DDOSProtection(NiveauDeVerification tier)
        {
            diminueCompteur = new Timer(DiminueCompteur, null, tempsReductionCompteur, tempsReductionCompteur);
            lastCall        = DateTime.UtcNow;
            this.tier       = tier;
            switch (tier)
            {
            case NiveauDeVerification.Tier2:
                compteurMax            = 15;
                tempsReductionCompteur = new TimeSpan(0, 0, 3);    //3 secondes
                break;

            case NiveauDeVerification.Tier3:
            case NiveauDeVerification.Tier4:
                compteurMax            = 20;
                tempsReductionCompteur = new TimeSpan(0, 0, 1);
                break;
            }
        }