internal string Request(string url, NameValueCollection data, string referer) { string resp; try { resp = SteamWeb.RequestWithException( url, "POST", data, this._cookies, referer: referer, proxy: this._proxy); } catch (Exception e) { throw new SteamException($"Steam error: {e.Message}", e); } try { var offerResponse = JsonConvert.DeserializeObject <NewTradeOfferResponse>(resp); if (!string.IsNullOrEmpty(offerResponse.TradeOfferId)) { return(offerResponse.TradeOfferId); } throw new SteamException(offerResponse.TradeError); } catch (JsonException ex) { Logger.Log.Debug(resp); throw new SteamException($"Unknown steam response - {ex.Message}"); } }