Add supply contracts export executor

Hcs.Broker/Api/Request/RequestMultipleResult.cs

@@ -0,0 +1,52 @@
+using Hcs.Broker.Api.Request.Adapter;
+
+namespace Hcs.Broker.Api.Request
+{
+    public class RequestMultipleResult<T>
+    {
+        public bool Ready { get; set; }
+
+        public bool Success { get; set; }
+
+        public IEnumerable<T?>? Results { get; set; }
+
+        public string? NextResultsGuid { get; set; }
+
+        public IErrorMessage? ErrorMessage { get; set; }
+
+        public static RequestMultipleResult<T> CreateNotReady()
+        {
+            return new RequestMultipleResult<T>
+            {
+                Ready = false
+            };
+        }
+
+        public static RequestMultipleResult<T> CreateSuccessful(IEnumerable<T?>? results)
+        {
+            return new RequestMultipleResult<T>
+            {
+                Ready = true,
+                Success = true,
+                Results = results
+            };
+        }
+
+        public static RequestMultipleResult<T> CreateFailed(IErrorMessage? errorMessage)
+        {
+            return new RequestMultipleResult<T>
+            {
+                Ready = true,
+                Success = false,
+                ErrorMessage = errorMessage
+            };
+        }
+
+        public RequestMultipleResult<T> SetNextResultsGuid(string? nextResultsGuid)
+        {
+            NextResultsGuid = nextResultsGuid;
+
+            return this;
+        }
+    }
+}