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Providers/XKeyGenerator.cs

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+using System.Threading;
+using System.Threading.Tasks;
+using xDataService.Interfaces;
+using xModels.Base;
+
+namespace xDataService.Providers
+{
+    public abstract class XKeyGenerator<TEntity, TKey> : IXKeyGenerator<TEntity, TKey>
+    where TEntity : XBaseEntity<TKey>
+    {
+        public abstract Task<TKey> GenerateKey(
+            IXBaseRepository<TEntity, TKey> repository, 
+            CancellationToken cancellationToken = default
+        );
+
+        public abstract bool IsEmpty(TKey id);
+    }
+}