Структура

backend/src/Contracts/Conversations/Application/Abstractions/IChatsUnitOfWork.cs

@@ -0,0 +1,7 @@
+using Knot.Shared.Kernel;
+
+namespace Knot.Contracts.Conversations.Application.Abstractions;
+
+public interface IChatsUnitOfWork : IUnitOfWork
+{
+}

backend/src/Contracts/Conversations/Application/Abstractions/IUserStatusService.cs

@@ -0,0 +1,8 @@
+using System;
+
+namespace Knot.Contracts.Conversations.Application.Abstractions;
+
+public interface IUserStatusService
+{
+    bool IsUserOnline(string userId);
+}