public string AddSellOrder(string token, int amount) { if (!Server.clients.ContainsKey(token)) { return(NULL); } string username = (string)Server.clients[token]; Console.WriteLine("ADD_SELL_ORDER " + username + " " + amount); if (amount <= 0) { return(NULL); } dynamic user = Database.GetUser(username); double quote = Database.GetQuotes(1)[0].value; if (user == null) { return(NULL); } List <dynamic> sell_orders = Database.GetSellOrders(username); int diginotes = (int)Database.GetDiginotes(username).diginotes - amount; foreach (dynamic sell_order in sell_orders) { diginotes -= amount; } if (amount < 0) { return(NULL); } int remaining = Server.DoSellOrder(username, amount, quote); if (remaining > 0) { dynamic res = Database.AddSellOrder(username, remaining); if (res == null) { return(NULL); } } return(JsonConvert.SerializeObject(new { remaining = remaining })); }