Shared exchange functionality (#214)

CryptoExchange.Net/SharedApis/ResponseModels/SharedSpotSymbol.cs

@@ -0,0 +1,64 @@
+namespace CryptoExchange.Net.SharedApis
+{
+    /// <summary>
+    /// Symbol info
+    /// </summary>
+    public record SharedSpotSymbol
+    {
+        /// <summary>
+        /// Base asset of the symbol
+        /// </summary>
+        public string BaseAsset { get; set; }
+        /// <summary>
+        /// Quote asset of the symbol
+        /// </summary>
+        public string QuoteAsset { get; set; }
+        /// <summary>
+        /// The name of the symbol
+        /// </summary>
+        public string Name { get; set; }
+        /// <summary>
+        /// Minimal quantity of an order in the base asset
+        /// </summary>
+        public decimal? MinTradeQuantity { get; set; }
+        /// <summary>
+        /// Minimal notional value (quantity * price) of an order
+        /// </summary>
+        public decimal? MinNotionalValue { get; set; }
+        /// <summary>
+        /// Max quantity of an order in the base asset
+        /// </summary>
+        public decimal? MaxTradeQuantity { get; set; }
+        /// <summary>
+        /// Step by which the quantity should increase
+        /// </summary>
+        public decimal? QuantityStep { get; set; }
+        /// <summary>
+        /// Step by which the price should increase
+        /// </summary>
+        public decimal? PriceStep { get; set; }
+        /// <summary>
+        /// The max amount of decimal places for quantity
+        /// </summary>
+        public int? QuantityDecimals { get; set; }
+        /// <summary>
+        /// The max amount of decimal places for price
+        /// </summary>
+        public int? PriceDecimals { get; set; }
+        /// <summary>
+        /// Whether the symbol is currently available for trading
+        /// </summary>
+        public bool Trading { get; set; }
+
+        /// <summary>
+        /// ctor
+        /// </summary>
+        public SharedSpotSymbol(string baseAsset, string quoteAsset, string symbol, bool trading)
+        {
+            BaseAsset = baseAsset;
+            QuoteAsset = quoteAsset;
+            Name = symbol;
+            Trading = trading;
+        }
+    }
+}