diff --git a/app/src/main/java/io/github/chronosx88/influence/contracts/startchat/StartChatLogicContract.java b/app/src/main/java/io/github/chronosx88/influence/contracts/startchat/StartChatLogicContract.java
new file mode 100644
index 0000000..ea509c0
--- /dev/null
+++ b/app/src/main/java/io/github/chronosx88/influence/contracts/startchat/StartChatLogicContract.java
@@ -0,0 +1,5 @@
+package io.github.chronosx88.influence.contracts.startchat;
+
+public interface StartChatLogicContract {
+    void sendStartChatMessage(String peerID);
+}
diff --git a/app/src/main/java/io/github/chronosx88/influence/contracts/startchat/StartChatPresenterContract.java b/app/src/main/java/io/github/chronosx88/influence/contracts/startchat/StartChatPresenterContract.java
new file mode 100644
index 0000000..607f78a
--- /dev/null
+++ b/app/src/main/java/io/github/chronosx88/influence/contracts/startchat/StartChatPresenterContract.java
@@ -0,0 +1,5 @@
+package io.github.chronosx88.influence.contracts.startchat;
+
+public interface StartChatPresenterContract {
+    void startChatWithPeer(String peerID);
+}
diff --git a/app/src/main/java/io/github/chronosx88/influence/contracts/startchat/StartChatViewContract.java b/app/src/main/java/io/github/chronosx88/influence/contracts/startchat/StartChatViewContract.java
new file mode 100644
index 0000000..20327d0
--- /dev/null
+++ b/app/src/main/java/io/github/chronosx88/influence/contracts/startchat/StartChatViewContract.java
@@ -0,0 +1,6 @@
+package io.github.chronosx88.influence.contracts.startchat;
+
+public interface StartChatViewContract {
+    void showMessage(String message);
+    void showProgressDialog(boolean enabled);
+}
diff --git a/app/src/main/java/io/github/chronosx88/influence/helpers/NetworkHandler.java b/app/src/main/java/io/github/chronosx88/influence/helpers/NetworkHandler.java
new file mode 100644
index 0000000..ae117c6
--- /dev/null
+++ b/app/src/main/java/io/github/chronosx88/influence/helpers/NetworkHandler.java
@@ -0,0 +1,60 @@
+package io.github.chronosx88.influence.helpers;
+
+import com.google.gson.Gson;
+import com.google.gson.JsonObject;
+
+import net.tomp2p.dht.PeerDHT;
+import net.tomp2p.peers.PeerAddress;
+
+import io.github.chronosx88.influence.contracts.observer.Observer;
+import io.github.chronosx88.influence.helpers.actions.NetworkActions;
+import io.github.chronosx88.influence.helpers.actions.UIActions;
+import io.github.chronosx88.influence.observable.MainObservable;
+
+public class NetworkHandler implements Observer {
+    private Gson gson;
+    private PeerDHT peerDHT;
+
+    public NetworkHandler() {
+        gson = new Gson();
+        peerDHT = AppHelper.getPeerDHT();
+        AppHelper.getObservable().register(this, MainObservable.OTHER_ACTIONS_CHANNEL);
+    }
+
+    @Override
+    public void handleEvent(JsonObject object) {
+        new Thread(() -> {
+            switch (object.get("action").getAsInt()) {
+                case NetworkActions.START_CHAT: {
+                    String chatStarterPlainAddress = object.get("senderAddress").getAsString();
+                    createChatEntry(object.get("chatID").getAsString(), chatStarterPlainAddress);
+                    handleIncomingChat(object.get("chatID").getAsString(), PrepareData.prepareFromStore(chatStarterPlainAddress));
+                    JsonObject jsonObject = new JsonObject();
+                    jsonObject.addProperty("action", UIActions.NEW_CHAT);
+                    AppHelper.getObservable().notifyObservers(jsonObject, MainObservable.UI_ACTIONS_CHANNEL);
+                    break;
+                }
+
+                case NetworkActions.SUCCESSFULL_CREATE_CHAT: {
+                    createChatEntry(object.get("chatID").getAsString(), object.get("senderAddress").getAsString());
+                    JsonObject jsonObject = new JsonObject();
+                    jsonObject.addProperty("action", UIActions.SUCCESSFULL_CREATE_CHAT);
+                    AppHelper.getObservable().notifyObservers(jsonObject, MainObservable.UI_ACTIONS_CHANNEL);
+                    break;
+                }
+            }
+        }).start();
+    }
+
+    private void createChatEntry(String chatID, String peerAddress) {
+        // TODO: make saving chat in db
+    }
+
+    private void handleIncomingChat(String chatID, PeerAddress chatStarterAddress) {
+        JsonObject jsonObject = new JsonObject();
+        jsonObject.addProperty("action", NetworkActions.SUCCESSFULL_CREATE_CHAT);
+        jsonObject.addProperty("chatID", chatID);
+        jsonObject.addProperty("senderAddress", PrepareData.prepareToStore(peerDHT.peerAddress()));
+        AppHelper.getPeerDHT().peer().sendDirect(chatStarterAddress).object(gson.toJson(jsonObject)).start().awaitUninterruptibly();
+    }
+}
diff --git a/app/src/main/java/io/github/chronosx88/influence/helpers/PrepareData.java b/app/src/main/java/io/github/chronosx88/influence/helpers/PrepareData.java
new file mode 100644
index 0000000..ba5ba59
--- /dev/null
+++ b/app/src/main/java/io/github/chronosx88/influence/helpers/PrepareData.java
@@ -0,0 +1,17 @@
+package io.github.chronosx88.influence.helpers;
+
+import android.util.Base64;
+
+import java.nio.charset.StandardCharsets;
+
+public class PrepareData {
+    public static <T> String prepareToStore(T object) {
+        String serializedObject = Serializer.serializeObject(object);
+        return Base64.encodeToString(serializedObject.getBytes(StandardCharsets.UTF_8), Base64.URL_SAFE);
+    }
+
+    public static <T> T prepareFromStore(String object) {
+        String decodedString = new String(Base64.decode(object, Base64.URL_SAFE), StandardCharsets.UTF_8);
+        return Serializer.deserializeObject(decodedString);
+    }
+}
diff --git a/app/src/main/java/io/github/chronosx88/influence/helpers/NetworkActions.java b/app/src/main/java/io/github/chronosx88/influence/helpers/actions/NetworkActions.java
similarity index 68%
rename from app/src/main/java/io/github/chronosx88/influence/helpers/NetworkActions.java
rename to app/src/main/java/io/github/chronosx88/influence/helpers/actions/NetworkActions.java
index 3c6ca26..dc5c773 100644
--- a/app/src/main/java/io/github/chronosx88/influence/helpers/NetworkActions.java
+++ b/app/src/main/java/io/github/chronosx88/influence/helpers/actions/NetworkActions.java
@@ -1,4 +1,4 @@
-package io.github.chronosx88.influence.helpers;
+package io.github.chronosx88.influence.helpers.actions;
 
 public class NetworkActions {
     public static final int START_CHAT = 0x0;
@@ -6,4 +6,5 @@ public class NetworkActions {
     public static final int MESSAGE_SENT = 0x2;
     public static final int PING = 0x3;
     public static final int PONG = 0x4;
+    public static final int SUCCESSFULL_CREATE_CHAT = 0x5;
 }
diff --git a/app/src/main/java/io/github/chronosx88/influence/helpers/UIActions.java b/app/src/main/java/io/github/chronosx88/influence/helpers/actions/UIActions.java
similarity index 70%
rename from app/src/main/java/io/github/chronosx88/influence/helpers/UIActions.java
rename to app/src/main/java/io/github/chronosx88/influence/helpers/actions/UIActions.java
index 1d03247..a784fcb 100644
--- a/app/src/main/java/io/github/chronosx88/influence/helpers/UIActions.java
+++ b/app/src/main/java/io/github/chronosx88/influence/helpers/actions/UIActions.java
@@ -1,4 +1,4 @@
-package io.github.chronosx88.influence.helpers;
+package io.github.chronosx88.influence.helpers.actions;
 
 public class UIActions {
     public static final int BOOTSTRAP_NOT_SPECIFIED = 0x0;
@@ -8,4 +8,6 @@ public class UIActions {
     public static final int RELAY_CONNECTION_ERROR = 0x4;
     public static final int BOOTSTRAP_ERROR = 0x5;
     public static final int NEW_CHAT = 0x6;
+    public static final int PEER_NOT_EXIST = 0x7;
+    public static final int SUCCESSFULL_CREATE_CHAT = 0x8;
 }
diff --git a/app/src/main/java/io/github/chronosx88/influence/logic/ChatListLogic.java b/app/src/main/java/io/github/chronosx88/influence/logic/ChatListLogic.java
index 3f8971a..3b6c7ea 100644
--- a/app/src/main/java/io/github/chronosx88/influence/logic/ChatListLogic.java
+++ b/app/src/main/java/io/github/chronosx88/influence/logic/ChatListLogic.java
@@ -7,8 +7,8 @@ import java.util.List;
 import io.github.chronosx88.influence.contracts.chatlist.ChatListLogicContract;
 import io.github.chronosx88.influence.contracts.observer.Observer;
 import io.github.chronosx88.influence.helpers.AppHelper;
-import io.github.chronosx88.influence.helpers.NetworkActions;
-import io.github.chronosx88.influence.helpers.UIActions;
+import io.github.chronosx88.influence.helpers.actions.NetworkActions;
+import io.github.chronosx88.influence.helpers.actions.UIActions;
 import io.github.chronosx88.influence.models.roomEntities.ChatEntity;
 import io.github.chronosx88.influence.observable.MainObservable;
 
diff --git a/app/src/main/java/io/github/chronosx88/influence/logic/MainLogic.java b/app/src/main/java/io/github/chronosx88/influence/logic/MainLogic.java
index d9b5187..4cc8905 100644
--- a/app/src/main/java/io/github/chronosx88/influence/logic/MainLogic.java
+++ b/app/src/main/java/io/github/chronosx88/influence/logic/MainLogic.java
@@ -2,6 +2,7 @@ package io.github.chronosx88.influence.logic;
 
 import android.content.Context;
 import android.content.SharedPreferences;
+import android.util.Base64;
 import android.util.Log;
 
 import com.google.gson.Gson;
@@ -19,20 +20,30 @@ import net.tomp2p.p2p.PeerBuilder;
 import net.tomp2p.peers.Number160;
 import net.tomp2p.peers.PeerAddress;
 import net.tomp2p.relay.tcp.TCPRelayClientConfig;
+import net.tomp2p.replication.AutoReplication;
+import net.tomp2p.storage.Data;
 
 import org.json.JSONObject;
 
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
 import java.io.IOException;
 import java.net.Inet4Address;
 import java.net.InetAddress;
 import java.net.UnknownHostException;
+import java.nio.charset.StandardCharsets;
+import java.security.KeyPair;
+import java.security.KeyPairGenerator;
+import java.security.NoSuchAlgorithmException;
 import java.util.UUID;
 
 import io.github.chronosx88.influence.contracts.main.MainLogicContract;
 import io.github.chronosx88.influence.helpers.AppHelper;
-import io.github.chronosx88.influence.helpers.NetworkActions;
+import io.github.chronosx88.influence.helpers.Serializer;
 import io.github.chronosx88.influence.helpers.StorageMVStore;
-import io.github.chronosx88.influence.helpers.UIActions;
+import io.github.chronosx88.influence.helpers.actions.NetworkActions;
+import io.github.chronosx88.influence.helpers.actions.UIActions;
 import io.github.chronosx88.influence.observable.MainObservable;
 
 public class MainLogic implements MainLogicContract {
@@ -45,6 +56,7 @@ public class MainLogic implements MainLogicContract {
     private InetAddress bootstrapAddress = null;
     private PeerAddress bootstrapPeerAddress = null;
     private Gson gson;
+    private AutoReplication replication;
 
     public MainLogic() {
         this.context = AppHelper.getContext();
@@ -120,6 +132,11 @@ public class MainLogic implements MainLogicContract {
                 AppHelper.storePeerID(preferences.getString("peerID", null));
                 AppHelper.storePeerDHT(peerDHT);
                 setReceiveHandler();
+                Gson gson = new Gson();
+                JsonObject publicProfile = new JsonObject();
+                publicProfile.addProperty("peerAddress", Base64.encodeToString(Serializer.serializeObject(peerDHT.peerAddress()).getBytes(StandardCharsets.UTF_8), Base64.URL_SAFE));
+                peerDHT.put(Number160.createHash(preferences.getString("peerID", null) + "_profile")).data(new Data(gson.toJson(publicProfile)).protectEntry(createMainKeyPair())).start().awaitUninterruptibly();
+                replication = new AutoReplication(peerDHT.peer()).start();
             } catch (IOException e) {
                 e.printStackTrace();
             }
@@ -184,7 +201,8 @@ public class MainLogic implements MainLogicContract {
 
     @Override
     public void shutdownPeer() {
-        peerDHT.shutdown();
+        replication.shutdown().start();
+        peerDHT.peer().announceShutdown().start().awaitUninterruptibly();
     }
 
     private boolean checkFirstRun() {
@@ -196,4 +214,34 @@ public class MainLogic implements MainLogicContract {
         }
         return false;
     }
+
+    private KeyPair createMainKeyPair() {
+        KeyPair kp = null;
+        try {
+            File keyPairDir = new File(AppHelper.getContext().getFilesDir().getAbsoluteFile(), "keyPairs");
+            if (!keyPairDir.exists())
+                keyPairDir.mkdir();
+            File mainKeyPairFile = new File(keyPairDir, "mainKeyPair.kp");
+            if (!mainKeyPairFile.exists()) {
+                mainKeyPairFile.createNewFile();
+                try {
+                    kp = KeyPairGenerator.getInstance("RSA").generateKeyPair();
+                } catch (NoSuchAlgorithmException e) {
+                    e.printStackTrace();
+                }
+                FileOutputStream outputStream = new FileOutputStream(mainKeyPairFile);
+                outputStream.write(Serializer.serializeObject(kp).getBytes(StandardCharsets.UTF_8));
+                outputStream.close();
+                return kp;
+            }
+            FileInputStream inputStream = new FileInputStream(mainKeyPairFile);
+            byte[] serializedKeyPair = new byte[(int) mainKeyPairFile.length()];
+            inputStream.read(serializedKeyPair);
+            inputStream.close();
+            kp = Serializer.deserializeObject(new String(serializedKeyPair, StandardCharsets.UTF_8));
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        return kp;
+    }
 }
diff --git a/app/src/main/java/io/github/chronosx88/influence/logic/StartChatLogic.java b/app/src/main/java/io/github/chronosx88/influence/logic/StartChatLogic.java
new file mode 100644
index 0000000..9f3b3ba
--- /dev/null
+++ b/app/src/main/java/io/github/chronosx88/influence/logic/StartChatLogic.java
@@ -0,0 +1,79 @@
+package io.github.chronosx88.influence.logic;
+
+import android.util.Base64;
+
+import com.google.gson.Gson;
+import com.google.gson.JsonObject;
+import com.google.gson.JsonParser;
+
+import net.tomp2p.dht.FutureGet;
+import net.tomp2p.dht.PeerDHT;
+import net.tomp2p.futures.FuturePing;
+import net.tomp2p.peers.Number160;
+import net.tomp2p.peers.PeerAddress;
+
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.util.UUID;
+
+import io.github.chronosx88.influence.contracts.startchat.StartChatLogicContract;
+import io.github.chronosx88.influence.helpers.AppHelper;
+import io.github.chronosx88.influence.helpers.PrepareData;
+import io.github.chronosx88.influence.helpers.Serializer;
+import io.github.chronosx88.influence.helpers.actions.NetworkActions;
+import io.github.chronosx88.influence.helpers.actions.UIActions;
+import io.github.chronosx88.influence.observable.MainObservable;
+
+public class StartChatLogic implements StartChatLogicContract {
+    private PeerDHT peerDHT;
+    private Gson gson;
+
+    public StartChatLogic() {
+        peerDHT = AppHelper.getPeerDHT();
+        gson = new Gson();
+    }
+
+    @Override
+    public void sendStartChatMessage(String peerID) {
+        new Thread(() -> {
+            JsonObject recipientPublicProfile = getPublicProfile(peerID);
+            if(recipientPublicProfile == null) {
+                JsonObject jsonObject = new JsonObject();
+                jsonObject.addProperty("action", UIActions.PEER_NOT_EXIST);
+                AppHelper.getObservable().notifyObservers(jsonObject, MainObservable.UI_ACTIONS_CHANNEL);
+                return;
+            }
+            String peerAddressString = recipientPublicProfile.get("peerAddress").getAsString();
+            PeerAddress peerAddress = Serializer.deserializeObject(new String(Base64.decode(peerAddressString, Base64.URL_SAFE), StandardCharsets.UTF_8));
+            FuturePing ping = peerDHT.peer().ping().peerAddress(peerAddress).start().awaitUninterruptibly();
+            if(ping.isSuccess()) {
+                JsonObject jsonObject = new JsonObject();
+                jsonObject.addProperty("action", NetworkActions.START_CHAT);
+                jsonObject.addProperty("chatID", UUID.randomUUID().toString());
+                // TODO: Append public key to new chat request (for encryption)
+                jsonObject.addProperty("senderAddress", PrepareData.prepareToStore(peerDHT.peerAddress()));
+                peerDHT.peer().sendDirect(peerAddress).object(gson.toJson(jsonObject)).start();
+            } else {
+                // TODO: put chat entry to "*peerID*_newChats". That peer later will fetch this new chats
+            }
+        }).start();
+    }
+
+    private JsonObject getPublicProfile(String peerID) {
+        JsonObject publicProfile;
+        FutureGet futureGetProfile = peerDHT.get(Number160.createHash(peerID + "_profile")).start().awaitUninterruptibly();
+        if (futureGetProfile.isSuccess()) {
+            String jsonString = null;
+            try {
+                jsonString = (String) futureGetProfile.data().object();
+            } catch (ClassNotFoundException e) {
+                e.printStackTrace();
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+            publicProfile = new JsonParser().parse(jsonString).getAsJsonObject();
+            return publicProfile;
+        }
+        return null;
+    }
+}
diff --git a/app/src/main/java/io/github/chronosx88/influence/models/roomEntities/ChatEntity.java b/app/src/main/java/io/github/chronosx88/influence/models/roomEntities/ChatEntity.java
index 79861f1..6476703 100644
--- a/app/src/main/java/io/github/chronosx88/influence/models/roomEntities/ChatEntity.java
+++ b/app/src/main/java/io/github/chronosx88/influence/models/roomEntities/ChatEntity.java
@@ -9,11 +9,13 @@ import androidx.room.PrimaryKey;
 public class ChatEntity {
     @NonNull @PrimaryKey String id;
     @ColumnInfo  String name;
+    @ColumnInfo String peerAddresses;
     @ColumnInfo String keyPairID;
 
-    public ChatEntity(String id, String name, String keyPairID) {
+    public ChatEntity(String id, String name, String peerAddresses, String keyPairID) {
         this.id = id;
         this.name = name;
+        this.peerAddresses = peerAddresses;
         this.keyPairID = keyPairID;
     }
 
@@ -25,6 +27,8 @@ public class ChatEntity {
         return keyPairID;
     }
 
+    public String getPeerAddress() { return  peerAddresses; }
+
     public String getName() {
         return name;
     }
diff --git a/app/src/main/java/io/github/chronosx88/influence/presenters/StartChatPresenter.java b/app/src/main/java/io/github/chronosx88/influence/presenters/StartChatPresenter.java
new file mode 100644
index 0000000..f527732
--- /dev/null
+++ b/app/src/main/java/io/github/chronosx88/influence/presenters/StartChatPresenter.java
@@ -0,0 +1,45 @@
+package io.github.chronosx88.influence.presenters;
+
+import com.google.gson.JsonObject;
+
+import io.github.chronosx88.influence.contracts.observer.Observer;
+import io.github.chronosx88.influence.contracts.startchat.StartChatLogicContract;
+import io.github.chronosx88.influence.contracts.startchat.StartChatPresenterContract;
+import io.github.chronosx88.influence.contracts.startchat.StartChatViewContract;
+import io.github.chronosx88.influence.helpers.AppHelper;
+import io.github.chronosx88.influence.helpers.actions.UIActions;
+import io.github.chronosx88.influence.logic.StartChatLogic;
+import io.github.chronosx88.influence.observable.MainObservable;
+
+public class StartChatPresenter implements StartChatPresenterContract, Observer {
+    private StartChatViewContract view;
+    private StartChatLogicContract logic;
+
+    public StartChatPresenter(StartChatViewContract view) {
+        this.view = view;
+        this.logic = new StartChatLogic();
+        AppHelper.getObservable().register(this, MainObservable.UI_ACTIONS_CHANNEL);
+    }
+
+    @Override
+    public void startChatWithPeer(String peerID) {
+        // TODO
+    }
+
+    @Override
+    public void handleEvent(JsonObject object) {
+        switch (object.get("action").getAsInt()) {
+            case UIActions.PEER_NOT_EXIST: {
+                view.showProgressDialog(false);
+                view.showMessage("Данный узел не существует!");
+                break;
+            }
+
+            case UIActions.SUCCESSFULL_CREATE_CHAT: {
+                view.showProgressDialog(false);
+                view.showMessage("Чат успешно создан");
+                break;
+            }
+        }
+    }
+}
diff --git a/app/src/main/java/io/github/chronosx88/influence/views/MainActivity.java b/app/src/main/java/io/github/chronosx88/influence/views/MainActivity.java
index 644478a..4778f21 100644
--- a/app/src/main/java/io/github/chronosx88/influence/views/MainActivity.java
+++ b/app/src/main/java/io/github/chronosx88/influence/views/MainActivity.java
@@ -17,7 +17,7 @@ import io.github.chronosx88.influence.contracts.main.MainPresenterContract;
 import io.github.chronosx88.influence.contracts.main.MainViewContract;
 import io.github.chronosx88.influence.contracts.observer.Observer;
 import io.github.chronosx88.influence.helpers.AppHelper;
-import io.github.chronosx88.influence.helpers.UIActions;
+import io.github.chronosx88.influence.helpers.actions.UIActions;
 import io.github.chronosx88.influence.observable.MainObservable;
 import io.github.chronosx88.influence.presenters.MainPresenter;
 import io.github.chronosx88.influence.views.fragments.ChatListFragment;
diff --git a/app/src/main/java/io/github/chronosx88/influence/views/fragments/ChatListFragment.java b/app/src/main/java/io/github/chronosx88/influence/views/fragments/ChatListFragment.java
index 4384a9d..36da478 100644
--- a/app/src/main/java/io/github/chronosx88/influence/views/fragments/ChatListFragment.java
+++ b/app/src/main/java/io/github/chronosx88/influence/views/fragments/ChatListFragment.java
@@ -17,7 +17,7 @@ import io.github.chronosx88.influence.contracts.chatlist.ChatListViewContract;
 import io.github.chronosx88.influence.contracts.observer.Observer;
 import io.github.chronosx88.influence.helpers.AppHelper;
 import io.github.chronosx88.influence.helpers.ChatListAdapter;
-import io.github.chronosx88.influence.helpers.UIActions;
+import io.github.chronosx88.influence.helpers.actions.UIActions;
 import io.github.chronosx88.influence.observable.MainObservable;
 import io.github.chronosx88.influence.presenters.ChatListPresenter;
 
diff --git a/app/src/main/java/io/github/chronosx88/influence/views/fragments/StartChatFragment.java b/app/src/main/java/io/github/chronosx88/influence/views/fragments/StartChatFragment.java
index b629abc..7302748 100644
--- a/app/src/main/java/io/github/chronosx88/influence/views/fragments/StartChatFragment.java
+++ b/app/src/main/java/io/github/chronosx88/influence/views/fragments/StartChatFragment.java
@@ -1,20 +1,23 @@
 package io.github.chronosx88.influence.views.fragments;
 
+import android.app.ProgressDialog;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 
+import com.google.android.material.snackbar.Snackbar;
+import com.google.android.material.textfield.TextInputLayout;
+
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.fragment.app.Fragment;
 import io.github.chronosx88.influence.R;
+import io.github.chronosx88.influence.contracts.startchat.StartChatViewContract;
 
-public class StartChatFragment extends Fragment {
-    @Override
-    public void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-    }
+public class StartChatFragment extends Fragment implements StartChatViewContract {
+    private TextInputLayout textInputPeerID;
+    private ProgressDialog progressDialog;
 
     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
@@ -25,6 +28,25 @@ public class StartChatFragment extends Fragment {
     @Override
     public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
         super.onViewCreated(view, savedInstanceState);
-        // TODO
+        textInputPeerID = view.findViewById(R.id.textInputPeerID);
+        progressDialog = new ProgressDialog(getActivity(), R.style.AlertDialogTheme);
+        progressDialog.setCancelable(false);
+        progressDialog.setProgressStyle(android.R.style.Widget_ProgressBar_Small);
     }
+
+    @Override
+    public void showMessage(String message) {
+        Snackbar.make(getView().findViewById(R.id.start_chat_coordinator), message, Snackbar.LENGTH_SHORT).show();
+    }
+
+    @Override
+    public void showProgressDialog(boolean enabled) {
+        if(enabled) {
+            progressDialog.show();
+        } else {
+            progressDialog.dismiss();
+        }
+    }
+
+    // TODO: clear text input
 }
diff --git a/app/src/main/res/layout/start_chat_fragment.xml b/app/src/main/res/layout/start_chat_fragment.xml
index 8a58a8a..bf08408 100644
--- a/app/src/main/res/layout/start_chat_fragment.xml
+++ b/app/src/main/res/layout/start_chat_fragment.xml
@@ -1,18 +1,32 @@
 <?xml version="1.0" encoding="utf-8"?>
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    android:orientation="vertical"
-    android:gravity="center"
+
+<androidx.coordinatorlayout.widget.CoordinatorLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/start_chat_coordinator"
     android:layout_width="match_parent"
     android:layout_height="match_parent">
+    <LinearLayout
+        android:orientation="vertical"
+        android:gravity="center"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent">
 
-    <EditText
-        android:layout_width="346dp"
-        android:layout_height="wrap_content"
-        android:layout_gravity="center"
-        android:hint="Peer ID"/>
-    <Button
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:text="Создать чат"/>
+        <com.google.android.material.textfield.TextInputLayout
+            android:id="@+id/textInputPeerID"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center">
+            <com.google.android.material.textfield.TextInputEditText
+                android:layout_width="346dp"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:hint="Peer ID"/>
+        </com.google.android.material.textfield.TextInputLayout>
 
-</LinearLayout>
\ No newline at end of file
+        <Button
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="Создать чат"/>
+
+    </LinearLayout>
+</androidx.coordinatorlayout.widget.CoordinatorLayout>
\ No newline at end of file