Added ITransferRestClient, updated Shared IBalanceRestClient to use SharedAccountType

CryptoExchange.Net/SharedApis/Interfaces/Rest/IBalanceRestClient.cs

@@ -12,7 +12,7 @@ namespace CryptoExchange.Net.SharedApis
         /// <summary>
         /// Balances request options
         /// </summary>
-        EndpointOptions<GetBalancesRequest> GetBalancesOptions { get; }
+        GetBalancesOptions GetBalancesOptions { get; }
 
         /// <summary>
         /// Get balances for the user

CryptoExchange.Net/SharedApis/Interfaces/Rest/ITransferRestClient.cs

@@ -0,0 +1,25 @@
+using CryptoExchange.Net.Objects;
+using System.Collections.Generic;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace CryptoExchange.Net.SharedApis
+{
+    /// <summary>
+    /// Client for transferring funds between account types
+    /// </summary>
+    public interface ITransferRestClient : ISharedClient
+    {
+        /// <summary>
+        /// Transfer request options
+        /// </summary>
+        TransferOptions TransferOptions { get; }
+
+        /// <summary>
+        /// Transfer funds between account types
+        /// </summary>
+        /// <param name="request">Request info</param>
+        /// <param name="ct">Cancellation token</param>
+        Task<ExchangeWebResult<SharedId>> TransferAsync(TransferRequest request, CancellationToken ct = default);
+    }
+}