diff --git a/src/index.js b/src/index.js
index ad9a93a7c..b1d3350e6 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1 +1,108 @@
-'use strict';
+import express from 'express';
+import cors from 'cors';
+import { Server } from 'socket.io';
+
+const PORT = process.env.PORT || 3005;
+const app = express();
+
+app.use(cors());
+app.use(express.json());
+
+
+const messages = [];
+
+const roomMeta = {};
+
+app.post('/messages', (req, res) => {
+  const { text, username, messageTime } = req.body;
+
+  if (!text || text.trim().length === 0) {
+    return res.status(400).send('Write something!');
+  }
+
+  const message = {
+    id: Date.now(),
+    author: username,
+    text,
+    messageTime
+  };
+
+  io.emit('message', message);
+  messages.push(message);
+
+  res.status(200).json({ success: true });
+});
+
+const server = app.listen(PORT, () => {
+  console.log(`Server running at http://localhost:${PORT}/`);
+});
+
+const io = new Server(server, {
+  cors: {
+    origin: '*',
+  },
+});
+
+io.on('connection', (socket) => {
+  console.log('a user connected');
+
+  socket.on('getMessages', () => {
+    socket.emit('messages', messages);
+  });
+
+  socket.on('joinToRoom', ({ name }) => {
+    const roomId = name;
+
+    try {
+      socket.join(roomId);
+
+      if (!roomMeta[roomId]) {
+        roomMeta[roomId] = { roomId, name: name || 'Без названия' };
+      }
+
+      io.emit('roomList', Object.values(roomMeta));
+
+      socket.emit('checkRoomResult', { roomId, isMember: true });
+
+      socket.to(roomId).emit('message', `Пользователь ${socket.id} присоединился`);
+    } catch (error) {
+      console.log(error, 'error');
+    }
+  });
+
+  socket.on('renameRoom', (roomId, newName) => {
+    if (roomMeta[roomId]) {
+      roomMeta[roomId].name = newName;
+
+      // Уведомляем комнату
+      socket.to(roomId).emit('message', `Group was renamed to ${newName}`);
+
+      // Обновляем список для всех
+      io.emit('roomList', Object.values(roomMeta));
+    }
+  });
+
+  socket.on('checkRoom', (roomId) => {
+    const isMember = io.sockets.adapter.rooms.get(roomId)?.has(socket.id) || false;
+    socket.emit('checkRoomResult', { roomId, isMember });
+  });
+
+  socket.on('deleteRoom', (roomName) => {
+    if (roomMeta[roomName]) {
+      delete roomMeta[roomName];
+
+      io.emit('roomList', Object.values(roomMeta));
+    }
+
+    socket.leave(roomName);
+  });
+
+  socket.on('getRooms', () => {
+    socket.emit('roomsList', roomMeta);
+  });
+
+  socket.on('disconnect', () => {
+    console.log('user disconnected');
+  });
+});
+