internal bool IsSteamCardsRequest() => ItemsToGive.All(item => (item.AppID == Item.SteamAppID) && (item.ContextID == Item.SteamCommunityContextID) && (item.Type == Item.EType.TradingCard)); // REF: https://developer.valvesoftware.com/wiki/Steam_Web_API/IEconService#CEcon_TradeOffer | Constructed from code