From 347e195909c2904f7b1638320be25b0975aaeb3b Mon Sep 17 00:00:00 2001
From: ChronosX88 <chronosx88@gmail.com>
Date: Fri, 22 Mar 2019 20:08:29 +0400
Subject: [PATCH] Now chats are creating!!! Changed many things in app.

---
 .idea/gradle.xml                              |   3 +
 app/build.gradle                              |   7 +-
 .../2.json                                    | 102 ++++++++++
 .../chatlist/ChatListViewContract.java        |   4 +
 .../contracts/observer/NetworkObserver.java   |   5 +
 .../contracts/observer/Observable.java        |   9 +-
 .../influence/helpers/AppHelper.java          |   4 +-
 .../chronosx88/influence/helpers/DSAKey.java  |  34 ++++
 .../influence/helpers/KeyPairManager.java     |  11 +-
 .../influence/helpers/NetworkHandler.java     |  57 ++++--
 .../influence/helpers/PrepareData.java        |  16 +-
 .../influence/helpers/RoomHelper.java         |   2 +-
 .../influence/helpers/Serializer.java         |  55 +++---
 .../influence/helpers/StorageMVStore.java     | 187 +++++++++++++-----
 .../helpers/actions/NetworkActions.java       |   2 +-
 .../chronosx88/influence/logic/MainLogic.java |  91 ++++++---
 .../influence/logic/StartChatLogic.java       |  41 ++--
 .../influence/models/BasicNetworkMessage.java |  48 +++++
 .../models/NewChatRequestMessage.java         |  25 +++
 .../influence/models/PublicUserProfile.java   |  46 +++++
 .../influence/models/daos/ChatDao.java        |   7 +-
 .../models/roomEntities/ChatEntity.java       |  22 ++-
 .../models/roomEntities/MessageEntity.java    |  10 +-
 .../influence/observable/MainObservable.java  |  79 +++-----
 .../presenters/ChatListPresenter.java         |   5 +-
 .../presenters/StartChatPresenter.java        |   2 +-
 .../influence/views/MainActivity.java         |   4 +-
 .../views/fragments/ChatListFragment.java     |  13 +-
 .../views/fragments/StartChatFragment.java    |   9 +
 .../main/res/layout/start_chat_fragment.xml   |   1 +
 30 files changed, 676 insertions(+), 225 deletions(-)
 create mode 100644 app/schemas/io.github.chronosx88.influence.helpers.RoomHelper/2.json
 create mode 100644 app/src/main/java/io/github/chronosx88/influence/contracts/observer/NetworkObserver.java
 create mode 100644 app/src/main/java/io/github/chronosx88/influence/helpers/DSAKey.java
 create mode 100644 app/src/main/java/io/github/chronosx88/influence/models/BasicNetworkMessage.java
 create mode 100644 app/src/main/java/io/github/chronosx88/influence/models/NewChatRequestMessage.java
 create mode 100644 app/src/main/java/io/github/chronosx88/influence/models/PublicUserProfile.java

diff --git a/.idea/gradle.xml b/.idea/gradle.xml
index 7ac24c7..f43d428 100644
--- a/.idea/gradle.xml
+++ b/.idea/gradle.xml
@@ -3,6 +3,9 @@
   <component name="GradleSettings">
     <option name="linkedExternalProjectsSettings">
       <GradleProjectSettings>
+        <compositeConfiguration>
+          <compositeBuild compositeDefinitionSource="SCRIPT" />
+        </compositeConfiguration>
         <option name="distributionType" value="DEFAULT_WRAPPED" />
         <option name="externalProjectPath" value="$PROJECT_DIR$" />
         <option name="modules">
diff --git a/app/build.gradle b/app/build.gradle
index 6fdf2e1..0088b72 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -9,6 +9,11 @@ android {
         versionCode 1
         versionName "1.0"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+        javaCompileOptions {
+            annotationProcessorOptions {
+                arguments = ["room.schemaLocation": "$projectDir/schemas".toString()]
+            }
+        }
     }
     buildTypes {
         release {
@@ -44,5 +49,5 @@ dependencies {
     implementation 'com.google.android.material:material:1.1.0-alpha04'
     implementation 'androidx.preference:preference:1.1.0-alpha03'
     implementation 'com.google.code.gson:gson:2.8.5'
-    //implementation group: 'com.github.demidenko05', name: 'a-javabeans', version: '1.0.4'
+    implementation group: 'org.springframework.security', name: 'spring-security-crypto', version: '3.1.0.RELEASE'
 }
diff --git a/app/schemas/io.github.chronosx88.influence.helpers.RoomHelper/2.json b/app/schemas/io.github.chronosx88.influence.helpers.RoomHelper/2.json
new file mode 100644
index 0000000..e954cc6
--- /dev/null
+++ b/app/schemas/io.github.chronosx88.influence.helpers.RoomHelper/2.json
@@ -0,0 +1,102 @@
+{
+  "formatVersion": 1,
+  "database": {
+    "version": 2,
+    "identityHash": "1fdccce4cf398929958d6bf1f0ccfea6",
+    "entities": [
+      {
+        "tableName": "messages",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` TEXT NOT NULL, `chatID` TEXT, `sender` TEXT, `date` TEXT, `text` TEXT, PRIMARY KEY(`id`))",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "chatID",
+            "columnName": "chatID",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "sender",
+            "columnName": "sender",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "text",
+            "columnName": "text",
+            "affinity": "TEXT",
+            "notNull": false
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": false
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "chats",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `chatID` TEXT, `name` TEXT, `peerAddresses` BLOB, `keyPairID` TEXT)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "chatID",
+            "columnName": "chatID",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "peerAddresses",
+            "columnName": "peerAddresses",
+            "affinity": "BLOB",
+            "notNull": false
+          },
+          {
+            "fieldPath": "keyPairID",
+            "columnName": "keyPairID",
+            "affinity": "TEXT",
+            "notNull": false
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      }
+    ],
+    "views": [],
+    "setupQueries": [
+      "CREATE TABLE IF NOT EXISTS room_master_table (id INTEGER PRIMARY KEY,identity_hash TEXT)",
+      "INSERT OR REPLACE INTO room_master_table (id,identity_hash) VALUES(42, \"1fdccce4cf398929958d6bf1f0ccfea6\")"
+    ]
+  }
+}
\ No newline at end of file
diff --git a/app/src/main/java/io/github/chronosx88/influence/contracts/chatlist/ChatListViewContract.java b/app/src/main/java/io/github/chronosx88/influence/contracts/chatlist/ChatListViewContract.java
index 7572b22..69baa1a 100644
--- a/app/src/main/java/io/github/chronosx88/influence/contracts/chatlist/ChatListViewContract.java
+++ b/app/src/main/java/io/github/chronosx88/influence/contracts/chatlist/ChatListViewContract.java
@@ -1,7 +1,11 @@
 package io.github.chronosx88.influence.contracts.chatlist;
 
+import java.util.List;
+
 import io.github.chronosx88.influence.helpers.ChatListAdapter;
+import io.github.chronosx88.influence.models.roomEntities.ChatEntity;
 
 public interface ChatListViewContract {
     void setRecycleAdapter(ChatListAdapter adapter);
+    void updateChatList(ChatListAdapter adapter, List<ChatEntity> chats);
 }
diff --git a/app/src/main/java/io/github/chronosx88/influence/contracts/observer/NetworkObserver.java b/app/src/main/java/io/github/chronosx88/influence/contracts/observer/NetworkObserver.java
new file mode 100644
index 0000000..c398b1d
--- /dev/null
+++ b/app/src/main/java/io/github/chronosx88/influence/contracts/observer/NetworkObserver.java
@@ -0,0 +1,5 @@
+package io.github.chronosx88.influence.contracts.observer;
+
+public interface NetworkObserver {
+    void handleEvent(Object object);
+}
diff --git a/app/src/main/java/io/github/chronosx88/influence/contracts/observer/Observable.java b/app/src/main/java/io/github/chronosx88/influence/contracts/observer/Observable.java
index cdc3983..72d14ee 100644
--- a/app/src/main/java/io/github/chronosx88/influence/contracts/observer/Observable.java
+++ b/app/src/main/java/io/github/chronosx88/influence/contracts/observer/Observable.java
@@ -3,7 +3,10 @@ package io.github.chronosx88.influence.contracts.observer;
 import com.google.gson.JsonObject;
 
 public interface Observable {
-    void register(Observer observer, int channelID);
-    void unregister(Observer observer, int channelID);
-    void notifyObservers(JsonObject jsonObject, int channelID);
+    void register(Observer observer);
+    void register(NetworkObserver networkObserver);
+    void unregister(Observer observer);
+    void unregister(NetworkObserver networkObserver);
+    void notifyUIObservers(JsonObject jsonObject);
+    void notifyNetworkObservers(Object object);
 }
diff --git a/app/src/main/java/io/github/chronosx88/influence/helpers/AppHelper.java b/app/src/main/java/io/github/chronosx88/influence/helpers/AppHelper.java
index c85f033..e86b406 100644
--- a/app/src/main/java/io/github/chronosx88/influence/helpers/AppHelper.java
+++ b/app/src/main/java/io/github/chronosx88/influence/helpers/AppHelper.java
@@ -18,6 +18,7 @@ public class AppHelper extends Application {
     private static String peerID;
     private static PeerDHT peerDHT;
     private static RoomHelper chatDB;
+    private static NetworkHandler networkHandler;
 
     @Override
     public void onCreate() {
@@ -27,7 +28,6 @@ public class AppHelper extends Application {
         chatDB = Room.databaseBuilder(getApplicationContext(), RoomHelper.class, "chatDB")
                     .allowMainThreadQueries()
                     .build();
-
     }
 
     public static void storePeerID(String peerID1) { peerID = peerID1; }
@@ -45,4 +45,6 @@ public class AppHelper extends Application {
     public static PeerDHT getPeerDHT() { return peerDHT; }
 
     public static RoomHelper getChatDB() { return chatDB; }
+
+    public static void initNetworkHandler() { networkHandler = new NetworkHandler(); }
 }
\ No newline at end of file
diff --git a/app/src/main/java/io/github/chronosx88/influence/helpers/DSAKey.java b/app/src/main/java/io/github/chronosx88/influence/helpers/DSAKey.java
new file mode 100644
index 0000000..d4c3acf
--- /dev/null
+++ b/app/src/main/java/io/github/chronosx88/influence/helpers/DSAKey.java
@@ -0,0 +1,34 @@
+package io.github.chronosx88.influence.helpers;
+
+import java.io.Serializable;
+import java.math.BigInteger;
+
+public class DSAKey implements Serializable {
+    private BigInteger Q;
+    private BigInteger P;
+    private BigInteger Y;
+    private BigInteger G;
+
+    public DSAKey(BigInteger Q, BigInteger P, BigInteger Y, BigInteger G) {
+        this.Q = Q;
+        this.P = P;
+        this.Y = Y;
+        this.G = G;
+    }
+
+    public BigInteger getY() {
+        return Y;
+    }
+
+    public BigInteger getG() {
+        return G;
+    }
+
+    public BigInteger getP() {
+        return P;
+    }
+
+    public BigInteger getQ() {
+        return Q;
+    }
+}
diff --git a/app/src/main/java/io/github/chronosx88/influence/helpers/KeyPairManager.java b/app/src/main/java/io/github/chronosx88/influence/helpers/KeyPairManager.java
index 1808feb..b0147a1 100644
--- a/app/src/main/java/io/github/chronosx88/influence/helpers/KeyPairManager.java
+++ b/app/src/main/java/io/github/chronosx88/influence/helpers/KeyPairManager.java
@@ -14,6 +14,9 @@ public class KeyPairManager {
 
     public KeyPairManager() {
         this.keyPairDir = new File(AppHelper.getContext().getFilesDir().getAbsoluteFile(), "keyPairs");
+        if(!this.keyPairDir.exists()) {
+            this.keyPairDir.mkdir();
+        }
     }
 
     public KeyPair openMainKeyPair() {
@@ -37,7 +40,7 @@ public class KeyPairManager {
             byte[] serializedKeyPair = new byte[(int) keyPairFile.length()];
             inputStream.read(serializedKeyPair);
             inputStream.close();
-            keyPair = Serializer.deserializeObject(new String(serializedKeyPair, StandardCharsets.UTF_8));
+            keyPair = (KeyPair) Serializer.deserialize(serializedKeyPair);
         } catch (IOException e) {
             e.printStackTrace();
         }
@@ -48,9 +51,9 @@ public class KeyPairManager {
         KeyPair keyPair = null;
         try {
             keyPairFile.createNewFile();
-            keyPair = KeyPairGenerator.getInstance("RSA").generateKeyPair();
+            keyPair = KeyPairGenerator.getInstance("DSA").generateKeyPair();
             FileOutputStream outputStream = new FileOutputStream(keyPairFile);
-            outputStream.write(Serializer.serializeObject(keyPair).getBytes(StandardCharsets.UTF_8));
+            outputStream.write(Serializer.serialize(keyPair));
             outputStream.close();
         } catch (IOException | NoSuchAlgorithmException e) {
             e.printStackTrace();
@@ -63,7 +66,7 @@ public class KeyPairManager {
         if(!keyPairFile.exists()) {
             try {
                 FileOutputStream outputStream = new FileOutputStream(keyPairFile);
-                outputStream.write(Serializer.serializeObject(keyPair).getBytes(StandardCharsets.UTF_8));
+                outputStream.write(Serializer.serialize(keyPair));
                 outputStream.close();
             } catch (IOException e) {
                 e.printStackTrace();
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
index 1e063cf..d6bbce8 100644
--- a/app/src/main/java/io/github/chronosx88/influence/helpers/NetworkHandler.java
+++ b/app/src/main/java/io/github/chronosx88/influence/helpers/NetworkHandler.java
@@ -1,62 +1,77 @@
 package io.github.chronosx88.influence.helpers;
 
+import android.util.Log;
+
 import com.google.gson.Gson;
 import com.google.gson.JsonObject;
+import com.google.gson.JsonParser;
 
 import net.tomp2p.dht.PeerDHT;
 import net.tomp2p.peers.PeerAddress;
 
-import io.github.chronosx88.influence.contracts.observer.Observer;
+import java.util.List;
+
+import io.github.chronosx88.influence.contracts.observer.NetworkObserver;
 import io.github.chronosx88.influence.helpers.actions.NetworkActions;
 import io.github.chronosx88.influence.helpers.actions.UIActions;
+import io.github.chronosx88.influence.models.NewChatRequestMessage;
 import io.github.chronosx88.influence.models.roomEntities.ChatEntity;
-import io.github.chronosx88.influence.observable.MainObservable;
 
-public class NetworkHandler implements Observer {
+public class NetworkHandler implements NetworkObserver {
+    private final static String LOG_TAG = "NetworkHandler";
     private Gson gson;
     private PeerDHT peerDHT;
 
     public NetworkHandler() {
         gson = new Gson();
         peerDHT = AppHelper.getPeerDHT();
-        AppHelper.getObservable().register(this, MainObservable.OTHER_ACTIONS_CHANNEL);
+        AppHelper.getObservable().register(this);
     }
 
     @Override
-    public void handleEvent(JsonObject object) {
+    public void handleEvent(Object object) {
         new Thread(() -> {
-            switch (object.get("action").getAsInt()) {
-                case NetworkActions.START_CHAT: {
-                    String chatStarterPlainAddress = object.get("senderAddress").getAsString();
-                    createChatEntry(object.get("chatID").getAsString(), object.get("senderID").getAsString(), chatStarterPlainAddress);
-                    handleIncomingChat(object.get("chatID").getAsString(), PrepareData.prepareFromStore(chatStarterPlainAddress));
+            switch (getMessageAction((String) object)) {
+                case NetworkActions.CREATE_CHAT: {
+                    NewChatRequestMessage newChatRequestMessage = gson.fromJson((String) object, NewChatRequestMessage.class);
+                    createChatEntry(newChatRequestMessage.getChatID(), newChatRequestMessage.getChatID(), newChatRequestMessage.getSenderPeerAddress());
+                    handleIncomingChat(newChatRequestMessage.getChatID(), newChatRequestMessage.getSenderPeerAddress());
                     JsonObject jsonObject = new JsonObject();
                     jsonObject.addProperty("action", UIActions.NEW_CHAT);
-                    AppHelper.getObservable().notifyObservers(jsonObject, MainObservable.UI_ACTIONS_CHANNEL);
+                    AppHelper.getObservable().notifyUIObservers(jsonObject);
                     break;
                 }
 
                 case NetworkActions.SUCCESSFULL_CREATE_CHAT: {
-                    createChatEntry(object.get("chatID").getAsString(), object.get("senderID").getAsString(), object.get("senderAddress").getAsString());
+                    NewChatRequestMessage newChatRequestMessage = gson.fromJson((String) object, NewChatRequestMessage.class);
+                    createChatEntry(newChatRequestMessage.getChatID(), newChatRequestMessage.getSenderID(), newChatRequestMessage.getSenderPeerAddress());
                     JsonObject jsonObject = new JsonObject();
                     jsonObject.addProperty("action", UIActions.NEW_CHAT);
-                    AppHelper.getObservable().notifyObservers(jsonObject, MainObservable.UI_ACTIONS_CHANNEL);
+                    AppHelper.getObservable().notifyUIObservers(jsonObject);
                     break;
                 }
             }
         }).start();
     }
 
-    private void createChatEntry(String chatID, String name, String peerAddress) {
-        AppHelper.getChatDB().chatDao().addChat(new ChatEntity(chatID, name, peerAddress, ""));
+    private int getMessageAction(String json) {
+        JsonObject jsonObject = new JsonParser().parse(json).getAsJsonObject();
+        return jsonObject.get("action").getAsInt();
+    }
+
+    private void createChatEntry(String chatID, String name, PeerAddress peerAddress) {
+        List<ChatEntity> chatEntities = AppHelper.getChatDB().chatDao().getChatByChatID(chatID);
+        if (chatEntities.size() > 0) {
+            Log.e(LOG_TAG, "Failed to create chat " + chatID + " because chat exists!");
+            return;
+        }
+        AppHelper.getChatDB().chatDao().addChat(new ChatEntity(chatID, name, "", Serializer.serialize(peerAddress)));
     }
 
     private void handleIncomingChat(String chatID, PeerAddress chatStarterAddress) {
-        JsonObject jsonObject = new JsonObject();
-        jsonObject.addProperty("action", NetworkActions.SUCCESSFULL_CREATE_CHAT);
-        jsonObject.addProperty("chatID", chatID);
-        jsonObject.addProperty("senderID", AppHelper.getPeerID());
-        jsonObject.addProperty("senderAddress", PrepareData.prepareToStore(peerDHT.peerAddress()));
-        AppHelper.getPeerDHT().peer().sendDirect(chatStarterAddress).object(gson.toJson(jsonObject)).start().awaitUninterruptibly();
+        NewChatRequestMessage newChatRequestMessage = new NewChatRequestMessage(AppHelper.getPeerID(), peerDHT.peerAddress());
+        newChatRequestMessage.setChatID(chatID);
+        newChatRequestMessage.setAction(NetworkActions.SUCCESSFULL_CREATE_CHAT);
+        AppHelper.getPeerDHT().peer().sendDirect(chatStarterAddress).object(gson.toJson(newChatRequestMessage)).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
index ba5ba59..8f55c5a 100644
--- a/app/src/main/java/io/github/chronosx88/influence/helpers/PrepareData.java
+++ b/app/src/main/java/io/github/chronosx88/influence/helpers/PrepareData.java
@@ -1,17 +1,19 @@
 package io.github.chronosx88.influence.helpers;
 
-import android.util.Base64;
+import org.springframework.security.crypto.codec.Base64;
 
-import java.nio.charset.StandardCharsets;
+import java.io.Serializable;
 
 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);
+        if(object instanceof Serializable) {
+            byte[] serializedObject = Serializer.serialize(object);
+            return new String(Base64.encode(serializedObject));
+        }
+        return null;
     }
 
-    public static <T> T prepareFromStore(String object) {
-        String decodedString = new String(Base64.decode(object, Base64.URL_SAFE), StandardCharsets.UTF_8);
-        return Serializer.deserializeObject(decodedString);
+    public static Object prepareFromStore(String object) {
+        return Serializer.deserialize(Base64.decode(object.getBytes()));
     }
 }
diff --git a/app/src/main/java/io/github/chronosx88/influence/helpers/RoomHelper.java b/app/src/main/java/io/github/chronosx88/influence/helpers/RoomHelper.java
index 2beacaa..24e0a24 100644
--- a/app/src/main/java/io/github/chronosx88/influence/helpers/RoomHelper.java
+++ b/app/src/main/java/io/github/chronosx88/influence/helpers/RoomHelper.java
@@ -7,7 +7,7 @@ import io.github.chronosx88.influence.models.daos.MessageDao;
 import io.github.chronosx88.influence.models.roomEntities.ChatEntity;
 import io.github.chronosx88.influence.models.roomEntities.MessageEntity;
 
-@Database(entities = { MessageEntity.class, ChatEntity.class }, version = 1)
+@Database(entities = { MessageEntity.class, ChatEntity.class }, version = 2)
 public abstract class RoomHelper extends RoomDatabase {
     public abstract ChatDao chatDao();
     public abstract MessageDao messageDao();
diff --git a/app/src/main/java/io/github/chronosx88/influence/helpers/Serializer.java b/app/src/main/java/io/github/chronosx88/influence/helpers/Serializer.java
index 658ff26..ccefce7 100644
--- a/app/src/main/java/io/github/chronosx88/influence/helpers/Serializer.java
+++ b/app/src/main/java/io/github/chronosx88/influence/helpers/Serializer.java
@@ -1,45 +1,48 @@
 package io.github.chronosx88.influence.helpers;
 
-import org.jboss.serial.io.JBossObjectInputStream;
-import org.jboss.serial.io.JBossObjectOutputStream;
-
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
-import java.io.UnsupportedEncodingException;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
 import java.nio.charset.StandardCharsets;
 
 public class Serializer {
-    public static <T> String serializeObject(T t) {
-        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+    public static byte[] serialize(Object object) {
+        ByteArrayOutputStream byteArray = new ByteArrayOutputStream();
         try {
-            JBossObjectOutputStream out = new JBossObjectOutputStream(outputStream);
-            out.writeObject(t);
-            out.close();
+            ObjectOutputStream objectOutputStream = new ObjectOutputStream(byteArray);
+            objectOutputStream.writeObject(object);;
+            objectOutputStream.close();
         } catch (IOException e) {
             e.printStackTrace();
         }
-        try {
-            return outputStream.toString("UTF-8");
-        } catch (UnsupportedEncodingException e) {
-            e.printStackTrace();
-        }
-        return null;
+        return byteArray.toByteArray();
     }
 
-    public static <T> T deserializeObject(String str) {
-        ByteArrayInputStream inputStream = new ByteArrayInputStream(str.getBytes(StandardCharsets.UTF_8));
-        T obj = null;
+    public static Object deserialize(String serializedObject) {
+        ByteArrayInputStream inputStream = new ByteArrayInputStream(serializedObject.getBytes());
+        Object object = null;
         try {
-            JBossObjectInputStream in = new JBossObjectInputStream(inputStream);
-            obj = (T) in.readObject();
-            in.close();
-            inputStream.close();
-        } catch (IOException e) {
-            e.printStackTrace();
-        } catch (ClassNotFoundException e) {
+            ObjectInputStream objectInputStream = new ObjectInputStream(inputStream);
+            object = objectInputStream.readObject();
+        } catch (ClassNotFoundException | IOException e) {
             e.printStackTrace();
         }
-        return obj;
+        return object;
+    }
+
+    public static Object deserialize(byte[] serializedObject) {
+        if(serializedObject == null)
+            return null;
+        ByteArrayInputStream inputStream = new ByteArrayInputStream(serializedObject);
+        Object object = null;
+        try {
+            ObjectInputStream objectInputStream = new ObjectInputStream(inputStream);
+            object = objectInputStream.readObject();
+        } catch (ClassNotFoundException | IOException e) {
+            e.printStackTrace();
+        }
+        return object;
     }
 }
diff --git a/app/src/main/java/io/github/chronosx88/influence/helpers/StorageMVStore.java b/app/src/main/java/io/github/chronosx88/influence/helpers/StorageMVStore.java
index 8e5105e..b16bd27 100644
--- a/app/src/main/java/io/github/chronosx88/influence/helpers/StorageMVStore.java
+++ b/app/src/main/java/io/github/chronosx88/influence/helpers/StorageMVStore.java
@@ -1,17 +1,30 @@
 package io.github.chronosx88.influence.helpers;
 
+import android.util.Log;
+
+import net.tomp2p.connection.DSASignatureFactory;
+import net.tomp2p.connection.SignatureFactory;
 import net.tomp2p.dht.Storage;
 import net.tomp2p.peers.Number160;
 import net.tomp2p.peers.Number320;
 import net.tomp2p.peers.Number480;
 import net.tomp2p.peers.Number640;
+import net.tomp2p.storage.AlternativeCompositeByteBuf;
 import net.tomp2p.storage.Data;
 
 import org.h2.mvstore.MVMap;
 import org.h2.mvstore.MVStore;
 
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
 import java.io.File;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.nio.ByteBuffer;
+import java.security.InvalidKeyException;
+import java.security.KeyPair;
 import java.security.PublicKey;
+import java.security.SignatureException;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
@@ -24,26 +37,37 @@ import java.util.SortedMap;
 import java.util.TreeMap;
 import java.util.concurrent.ConcurrentHashMap;
 
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+
+import static io.github.chronosx88.influence.helpers.Serializer.deserialize;
+import static io.github.chronosx88.influence.helpers.Serializer.serialize;
+
 public class StorageMVStore implements Storage {
+    private final String LOG_TAG = "StorageMVStore";
+
     private MVStore db;
 
     // Core
-    final private MVMap<String, String> dataMap; // <Number 640, Data>
+    final private MVMap<byte[], byte[]> dataMap; // <Number 640, Data>
 
     // Maintenance
-    final private MVMap<String, String> timeoutMap; // <Number640, Long>
-    final private MVMap<String, String> timeoutMapRev; // <Long, Set<Number640>>
+    final private MVMap<byte[], byte[]> timeoutMap; // <Number640, Long>
+    final private MVMap<byte[], byte[]> timeoutMapRev; // <Long, Set<Number640>>
 
     // Protection
-    final private MVMap<String, String> protectedDomainMap; // <Number320, PublicKey>
-    final private MVMap<String, String> protectedEntryMap; // <Number480, PublicKey>
+    final private MVMap<byte[], byte[]> protectedDomainMap; // <Number320, PublicKey>
+    final private MVMap<byte[], byte[]> protectedEntryMap; // <Number480, PublicKey>
 
     // Responsibility
-    final private MVMap<String, String> responsibilityMap; // <Number160, Number160>
-    final private MVMap<String, String> responsibilityMapRev; // <Number160, Set<Number160>>
+    final private MVMap<byte[], byte[]> responsibilityMap; // <Number160, Number160>
+    final private MVMap<byte[], byte[]> responsibilityMapRev; // <Number160, Set<Number160>>
 
     final private int storageCheckIntervalMillis;
 
+    final private SignatureFactory signatureFactory;
+    final private KeyPairManager keyPairManager;
+
     public StorageMVStore(Number160 peerID, File path) {
         db = new MVStore.Builder()
                 .fileName(path.getAbsolutePath() + "/coreDB.db")
@@ -56,31 +80,33 @@ public class StorageMVStore implements Storage {
         responsibilityMap = db.openMap("responsibilityMap_" + peerID.toString());
         responsibilityMapRev = db.openMap("responsibilityMapRev_ " + peerID.toString());
         storageCheckIntervalMillis = 60 * 1000;
+        signatureFactory = new DSASignatureFactory();
+        keyPairManager = new KeyPairManager();
         Runtime.getRuntime().addShutdownHook(new JVMShutdownHook(this));
     }
 
     @Override
     public Data put(Number640 key, Data value) {
-        Data oldData = Serializer.deserializeObject(dataMap.put(Serializer.serializeObject(key), Serializer.serializeObject(value)));
+        Data oldData = deserializeData(dataMap.put(serialize(key), serializeData(value)));
         db.commit();
         return oldData;
     }
 
     @Override
     public Data get(Number640 key) {
-        return Serializer.deserializeObject(dataMap.get(Serializer.serializeObject(key)));
+        return deserializeData(dataMap.get(serialize(key)));
     }
 
     @Override
     public boolean contains(Number640 key) {
-        return dataMap.containsKey(Serializer.serializeObject(key));
+        return dataMap.containsKey(serialize(key));
     }
 
     @Override
     public int contains(Number640 from, Number640 to) {
         TreeMap<Number640, Data> tmp = new TreeMap<>();
-        for (Map.Entry<String, String> entry: dataMap.entrySet()) {
-            tmp.put(Serializer.deserializeObject(entry.getKey()), Serializer.deserializeObject(entry.getValue()));
+        for (Map.Entry<byte[], byte[]> entry: dataMap.entrySet()) {
+            tmp.put((Number640) deserialize(entry.getKey()), deserializeData(entry.getValue()));
         }
 
         return tmp.subMap(from, true, to, true).size();
@@ -88,7 +114,7 @@ public class StorageMVStore implements Storage {
 
     @Override
     public Data remove(Number640 key, boolean returnData) {
-        Data retVal = Serializer.deserializeObject(dataMap.remove(Serializer.serializeObject(key)));
+        Data retVal = deserializeData(dataMap.remove(serialize(key)));
         db.commit();
         return retVal;
     }
@@ -96,13 +122,13 @@ public class StorageMVStore implements Storage {
     @Override
     public NavigableMap<Number640, Data> remove(Number640 from, Number640 to) {
         TreeMap<Number640, Data> tmp = new TreeMap<>();
-        for (Map.Entry<String, String> entry: dataMap.entrySet()) {
-            tmp.put(Serializer.deserializeObject(entry.getKey()), Serializer.deserializeObject(entry.getValue()));
+        for (Map.Entry<byte[], byte[]> entry: dataMap.entrySet()) {
+            tmp.put((Number640) deserialize(entry.getKey()), deserializeData(entry.getValue()));
         }
 
         NavigableMap<Number640, Data> tmpSubMap = tmp.subMap(from, true, to, true);
         for (Map.Entry<Number640, Data> entry : tmpSubMap.entrySet()) {
-            dataMap.remove(Serializer.serializeObject(entry.getKey()));
+            dataMap.remove(serialize(entry.getKey()));
         }
         db.commit();
 
@@ -112,8 +138,8 @@ public class StorageMVStore implements Storage {
     @Override
     public NavigableMap<Number640, Data> subMap(Number640 from, Number640 to, int limit, boolean ascending) {
         TreeMap<Number640, Data> tmpDataMap = new TreeMap<>();
-        for (Map.Entry<String, String> entry: dataMap.entrySet()) {
-            tmpDataMap.put(Serializer.deserializeObject(entry.getKey()), Serializer.deserializeObject(entry.getValue()));
+        for (Map.Entry<byte[], byte[]> entry: dataMap.entrySet()) {
+            tmpDataMap.put((Number640) deserialize(entry.getKey()), deserializeData(entry.getValue()));
         }
 
         NavigableMap<Number640, Data> tmp = tmpDataMap.subMap(from, true, to, true);
@@ -138,8 +164,8 @@ public class StorageMVStore implements Storage {
     @Override
     public NavigableMap<Number640, Data> map() {
         final NavigableMap<Number640, Data> retVal = new TreeMap<>();
-        for(final Map.Entry<String, String> entry:dataMap.entrySet()) {
-            retVal.put(Serializer.deserializeObject(entry.getKey()), Serializer.deserializeObject(entry.getValue()));
+        for(final Map.Entry<byte[], byte[]> entry : dataMap.entrySet()) {
+            retVal.put((Number640) deserialize(entry.getKey()), deserializeData(entry.getValue()));
         }
 
         return retVal;
@@ -152,7 +178,7 @@ public class StorageMVStore implements Storage {
 
     @Override
     public void addTimeout(Number640 key, long expiration) {
-        Long oldExpiration = Serializer.deserializeObject(timeoutMap.put(Serializer.serializeObject(key), Serializer.serializeObject(expiration)));
+        Long oldExpiration = (Long) deserialize(timeoutMap.put(serialize(key), serialize(expiration)));
         putIfAbsent2(expiration, key);
         if (oldExpiration == null) {
             return;
@@ -162,29 +188,29 @@ public class StorageMVStore implements Storage {
     }
 
     private void putIfAbsent2(long expiration, Number640 key) {
-        Set<Number640> timeouts = Serializer.deserializeObject(timeoutMapRev.get(Serializer.serializeObject(expiration)));
+        Set<Number640> timeouts = (Set<Number640>) deserialize(timeoutMapRev.get(serialize(expiration)));
         if(timeouts == null) {
-            timeouts = Collections.newSetFromMap(new ConcurrentHashMap<Number640, Boolean>());
+            timeouts = Collections.newSetFromMap(new ConcurrentHashMap<>());
         }
         timeouts.add(key);
-        timeoutMapRev.put(Serializer.serializeObject(expiration), Serializer.serializeObject(timeouts));
+        timeoutMapRev.put(serialize(expiration), serialize(timeouts));
     }
 
     private void removeRevTimeout(Number640 key, Long expiration) {
-        Set<Number640> tmp = Serializer.deserializeObject(timeoutMapRev.get(Serializer.serializeObject(expiration)));
+        Set<Number640> tmp = (Set<Number640>) deserialize(timeoutMapRev.get(serialize(expiration)));
         if (tmp != null) {
             tmp.remove(key);
             if (tmp.isEmpty()) {
-                timeoutMapRev.remove(expiration);
+                timeoutMapRev.remove(serialize(expiration));
             } else {
-                timeoutMapRev.put(Serializer.serializeObject(expiration), Serializer.serializeObject(tmp));
+                timeoutMapRev.put(serialize(expiration), serialize(tmp));
             }
         }
     }
 
     @Override
     public void removeTimeout(Number640 key) {
-        Long expiration = Serializer.deserializeObject(timeoutMap.remove(Serializer.serializeObject(key)));
+        Long expiration = (Long) deserialize(timeoutMap.remove(serialize(key)));
         if (expiration == null) {
             return;
         }
@@ -195,8 +221,8 @@ public class StorageMVStore implements Storage {
     @Override
     public Collection<Number640> subMapTimeout(long to) {
         TreeMap<Long, Set<Number640>> tmpTimeoutMapRev = new TreeMap<>();
-        for (Map.Entry<String, String> entry: timeoutMapRev.entrySet()) {
-            tmpTimeoutMapRev.put(Serializer.deserializeObject(entry.getKey()), Serializer.deserializeObject(entry.getValue()));
+        for (Map.Entry<byte[], byte[]> entry: timeoutMapRev.entrySet()) {
+            tmpTimeoutMapRev.put( (Long) deserialize(entry.getKey()), (Set<Number640>) deserialize(entry.getValue()));
         }
 
         SortedMap<Long, Set<Number640>> tmp = tmpTimeoutMapRev.subMap(0L, to);
@@ -214,13 +240,13 @@ public class StorageMVStore implements Storage {
 
     @Override
     public boolean protectDomain(Number320 key, PublicKey publicKey) {
-        protectedDomainMap.put(Serializer.serializeObject(key), Serializer.serializeObject(publicKey));
+        protectedDomainMap.put(serialize(key), serialize(publicKey));
         return true;
     }
 
     @Override
     public boolean isDomainProtectedByOthers(Number320 key, PublicKey publicKey) {
-        PublicKey other = Serializer.deserializeObject(protectedDomainMap.get(Serializer.serializeObject(key)));
+        PublicKey other = (PublicKey) deserialize(protectedDomainMap.get(serialize(key)));
         if (other == null) {
             return false;
         }
@@ -229,13 +255,13 @@ public class StorageMVStore implements Storage {
 
     @Override
     public boolean protectEntry(Number480 key, PublicKey publicKey) {
-        protectedEntryMap.put(Serializer.serializeObject(key), Serializer.serializeObject(publicKey));
+        protectedEntryMap.put(serialize(key), serialize(publicKey));
         return true;
     }
 
     @Override
     public boolean isEntryProtectedByOthers(Number480 key, PublicKey publicKey) {
-        PublicKey other = Serializer.deserializeObject(protectedEntryMap.get(Serializer.serializeObject(key)));
+        PublicKey other = (PublicKey) deserialize(protectedEntryMap.get(serialize(key)));
         if (other == null) {
             return false;
         }
@@ -244,17 +270,17 @@ public class StorageMVStore implements Storage {
 
     @Override
     public Number160 findPeerIDsForResponsibleContent(Number160 locationKey) {
-        return Serializer.deserializeObject(responsibilityMap.get(Serializer.serializeObject(locationKey)));
+        return (Number160) deserialize(responsibilityMap.get(serialize(locationKey)));
     }
 
     @Override
     public Collection<Number160> findContentForResponsiblePeerID(Number160 peerID) {
-        return Serializer.deserializeObject(responsibilityMapRev.get(Serializer.serializeObject(peerID)));
+        return (Collection<Number160>) deserialize(responsibilityMapRev.get(serialize(peerID)));
     }
 
     @Override
     public boolean updateResponsibilities(Number160 locationKey, Number160 peerId) {
-        final Number160 oldPeerID = Serializer.deserializeObject(responsibilityMap.put(Serializer.serializeObject(locationKey), Serializer.serializeObject(peerId)));
+        final Number160 oldPeerID = (Number160) deserialize(responsibilityMap.put(serialize(locationKey), serialize(peerId)));
         final boolean hasChanged;
         if(oldPeerID != null) {
             if(oldPeerID.equals(peerId)) {
@@ -266,30 +292,103 @@ public class StorageMVStore implements Storage {
         } else {
             hasChanged = true;
         }
-        Set<Number160> contentIDs = Serializer.deserializeObject(responsibilityMapRev.get(Serializer.serializeObject(peerId)));
+        Set<Number160> contentIDs = (Set<Number160>) deserialize(responsibilityMapRev.get(serialize(peerId)));
         if(contentIDs == null) {
-            contentIDs = new HashSet<Number160>();
+            contentIDs = new HashSet<>();
         }
         contentIDs.add(locationKey);
-        responsibilityMapRev.put(Serializer.serializeObject(peerId), Serializer.serializeObject(contentIDs));
+        responsibilityMapRev.put(serialize(peerId), serialize(contentIDs));
         db.commit();
         return hasChanged;
     }
 
     @Override
     public void removeResponsibility(Number160 locationKey) {
-
+        final Number160 peerId = new Number160(responsibilityMap.remove(serialize(locationKey)));
+        if(peerId != null) {
+            removeRevResponsibility(peerId, locationKey);
+        }
+        db.commit();
     }
 
     private void removeRevResponsibility(Number160 peerId, Number160 locationKey) {
-        Set<Number160> contentIDs = Serializer.deserializeObject(responsibilityMapRev.get(Serializer.serializeObject(peerId)));
+        Set<Number160> contentIDs = (Set<Number160>) deserialize(responsibilityMapRev.get(serialize(peerId)));
         if (contentIDs != null) {
             contentIDs.remove(locationKey);
             if (contentIDs.isEmpty()) {
-                responsibilityMapRev.remove(peerId);
+                responsibilityMapRev.remove(serialize(peerId));
             } else {
-                responsibilityMapRev.put(Serializer.serializeObject(peerId), Serializer.serializeObject(contentIDs));
+                responsibilityMapRev.put(serialize(peerId), serialize(contentIDs));
             }
         }
     }
+
+
+    private byte[] serializeData(Data data) {
+        KeyPair mainKeyPair = keyPairManager.openMainKeyPair();
+        KeyPair forSigningKP = keyPairManager.getKeyPair("mainSigningKeyPair");
+        data.sign(forSigningKP).protectEntry(mainKeyPair);
+        ByteArrayOutputStream out = new ByteArrayOutputStream();
+        AlternativeCompositeByteBuf acb = AlternativeCompositeByteBuf.compBuffer(AlternativeCompositeByteBuf.UNPOOLED_HEAP);
+        try {
+            // header first
+            data.encodeHeader(acb, signatureFactory);
+            writeData(out, acb.nioBuffers());
+            acb.skipBytes(acb.writerIndex());
+            // next data - no need to copy to another buffer, just take the data
+            // from memory
+            writeData(out, data.toByteBuffers());
+            // rest
+            data.encodeDone(acb, signatureFactory);
+            writeData(out, acb.nioBuffers());
+        } catch (SignatureException | InvalidKeyException | IOException e) {
+            e.printStackTrace();
+        }
+
+        return out.toByteArray();
+    }
+
+    private void writeData(OutputStream out, ByteBuffer[] nioBuffers) throws IOException {
+        final int length = nioBuffers.length;
+        for(int i=0;i < length; i++) {
+            int remaining = nioBuffers[i].remaining();
+            if(nioBuffers[i].hasArray()) {
+                out.write(nioBuffers[i].array(), nioBuffers[i].arrayOffset(), remaining);
+            } else {
+                byte[] me = new byte[remaining];
+                nioBuffers[i].get(me);
+                out.write(me);
+            }
+        }
+    }
+
+    private Data deserializeData(byte[] serializedData) {
+        if(serializedData == null) {
+            return null;
+        }
+        ByteArrayInputStream in = new ByteArrayInputStream(serializedData);
+        ByteBuf buf = Unpooled.buffer();
+        Data data = null;
+        while(data == null) {
+            buf.writeByte(in.read());
+            data = Data.decodeHeader(buf, signatureFactory);
+        }
+        int len = data.length();
+        byte me[] = new byte[len];
+        try {
+            in.read(me);
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        buf = Unpooled.wrappedBuffer(me);
+        boolean retVal = data.decodeBuffer(buf);
+        if(!retVal) {
+            Log.e(LOG_TAG, "# ERROR: Data could not be deserialized!");
+        }
+        retVal = data.decodeDone(buf, signatureFactory);
+        if(!retVal) {
+            Log.e(LOG_TAG, "# ERROR: Signature could not be read!");
+        }
+        return data;
+    }
 }
diff --git a/app/src/main/java/io/github/chronosx88/influence/helpers/actions/NetworkActions.java b/app/src/main/java/io/github/chronosx88/influence/helpers/actions/NetworkActions.java
index dc5c773..3ab13f0 100644
--- a/app/src/main/java/io/github/chronosx88/influence/helpers/actions/NetworkActions.java
+++ b/app/src/main/java/io/github/chronosx88/influence/helpers/actions/NetworkActions.java
@@ -1,7 +1,7 @@
 package io.github.chronosx88.influence.helpers.actions;
 
 public class NetworkActions {
-    public static final int START_CHAT = 0x0;
+    public static final int CREATE_CHAT = 0x0;
     public static final int NEW_MESSAGE = 0x1;
     public static final int MESSAGE_SENT = 0x2;
     public static final int PING = 0x3;
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 b6ac3a4..cd103db 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
@@ -9,6 +9,7 @@ import com.google.gson.Gson;
 import com.google.gson.JsonObject;
 import com.google.gson.JsonParser;
 
+import net.tomp2p.dht.FuturePut;
 import net.tomp2p.dht.PeerBuilderDHT;
 import net.tomp2p.dht.PeerDHT;
 import net.tomp2p.futures.FutureBootstrap;
@@ -30,15 +31,25 @@ import java.net.Inet4Address;
 import java.net.InetAddress;
 import java.net.UnknownHostException;
 import java.nio.charset.StandardCharsets;
+import java.security.KeyFactory;
+import java.security.KeyPair;
+import java.security.NoSuchAlgorithmException;
+import java.security.spec.DSAPublicKeySpec;
+import java.security.spec.InvalidKeySpecException;
 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.DSAKey;
 import io.github.chronosx88.influence.helpers.KeyPairManager;
+import io.github.chronosx88.influence.helpers.PrepareData;
 import io.github.chronosx88.influence.helpers.Serializer;
 import io.github.chronosx88.influence.helpers.StorageMVStore;
 import io.github.chronosx88.influence.helpers.actions.NetworkActions;
 import io.github.chronosx88.influence.helpers.actions.UIActions;
+import io.github.chronosx88.influence.models.BasicNetworkMessage;
+import io.github.chronosx88.influence.models.NewChatRequestMessage;
+import io.github.chronosx88.influence.models.PublicUserProfile;
 import io.github.chronosx88.influence.observable.MainObservable;
 
 public class MainLogic implements MainLogicContract {
@@ -92,47 +103,52 @@ public class MainLogic implements MainLogicContract {
                 } catch (NullPointerException e) {
                     JsonObject jsonObject = new JsonObject();
                     jsonObject.addProperty("action", UIActions.BOOTSTRAP_NOT_SPECIFIED);
-                    AppHelper.getObservable().notifyObservers(jsonObject, MainObservable.UI_ACTIONS_CHANNEL);
+                    AppHelper.getObservable().notifyUIObservers(jsonObject);
                     peerDHT.shutdown();
                     return;
                 } catch (UnknownHostException e) {
                     JsonObject jsonObject = new JsonObject();
                     jsonObject.addProperty("action", UIActions.NETWORK_ERROR);
-                    AppHelper.getObservable().notifyObservers(jsonObject, MainObservable.UI_ACTIONS_CHANNEL);
+                    AppHelper.getObservable().notifyUIObservers(jsonObject);
                     peerDHT.shutdown();
                     return;
                 }
 
+                boolean discoveredExternalAddress = false;
+
                 if(!discoverExternalAddress()) {
                     JsonObject jsonObject = new JsonObject();
                     jsonObject.addProperty("action", UIActions.PORT_FORWARDING_ERROR);
-                    AppHelper.getObservable().notifyObservers(jsonObject, MainObservable.UI_ACTIONS_CHANNEL);
+                    AppHelper.getObservable().notifyUIObservers(jsonObject);
+                } else {
+                    discoveredExternalAddress = true;
                 }
 
-                if(!setupConnectionToRelay()) {
-                    JsonObject jsonObject = new JsonObject();
-                    jsonObject.addProperty("action", UIActions.RELAY_CONNECTION_ERROR);
-                    AppHelper.getObservable().notifyObservers(jsonObject, MainObservable.UI_ACTIONS_CHANNEL);
-                    return;
+                if(!discoveredExternalAddress) {
+                    if(!setupConnectionToRelay()) {
+                        JsonObject jsonObject = new JsonObject();
+                        jsonObject.addProperty("action", UIActions.RELAY_CONNECTION_ERROR);
+                        AppHelper.getObservable().notifyUIObservers(jsonObject);
+                        return;
+                    }
                 }
 
                 if(!bootstrapPeer()) {
                     JsonObject jsonObject = new JsonObject();
                     jsonObject.addProperty("action", UIActions.BOOTSTRAP_ERROR);
-                    AppHelper.getObservable().notifyObservers(jsonObject, MainObservable.UI_ACTIONS_CHANNEL);
+                    AppHelper.getObservable().notifyUIObservers(jsonObject);
                     return;
                 }
 
                 JsonObject jsonObject = new JsonObject();
                 jsonObject.addProperty("action", UIActions.BOOTSTRAP_SUCCESS);
-                AppHelper.getObservable().notifyObservers(jsonObject, MainObservable.UI_ACTIONS_CHANNEL);
+                AppHelper.getObservable().notifyUIObservers(jsonObject);
                 AppHelper.storePeerID(preferences.getString("peerID", null));
                 AppHelper.storePeerDHT(peerDHT);
+                AppHelper.initNetworkHandler();
                 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(keyPairManager.openMainKeyPair())).start().awaitUninterruptibly();
+                gson = new Gson();
+                publicProfileToDHT();
                 replication = new AutoReplication(peerDHT.peer()).start();
             } catch (IOException e) {
                 e.printStackTrace();
@@ -185,21 +201,20 @@ public class MainLogic implements MainLogicContract {
     private void setReceiveHandler() {
         AppHelper.getPeerDHT().peer().objectDataReply((s, r) -> {
             Log.i(LOG_TAG, "# Incoming message: " + r);
-            JSONObject incomingObject = new JSONObject((String) r);
-            if(incomingObject.getInt("action") == NetworkActions.PING) {
-                JsonObject jsonObject = new JsonObject();
-                jsonObject.addProperty("action", NetworkActions.PONG);
-                return gson.toJson(jsonObject);
-            }
-            AppHelper.getObservable().notifyObservers(new JsonParser().parse((String) r).getAsJsonObject(), MainObservable.OTHER_ACTIONS_CHANNEL);
+            AppHelper.getObservable().notifyNetworkObservers(r);
             return null;
         });
     }
 
     @Override
     public void shutdownPeer() {
-        replication.shutdown().start();
-        peerDHT.peer().announceShutdown().start().awaitUninterruptibly();
+        new Thread(() -> {
+            if(replication != null) {
+                replication.shutdown().start();
+            }
+            peerDHT.peer().announceShutdown().start().awaitUninterruptibly();
+            peerDHT.peer().shutdown();
+        }).start();
     }
 
     private boolean checkFirstRun() {
@@ -211,4 +226,34 @@ public class MainLogic implements MainLogicContract {
         }
         return false;
     }
+
+    private void publicProfileToDHT() {
+        KeyPair mainKeyPair = keyPairManager.openMainKeyPair();
+        KeyFactory factory = null;
+        try {
+            factory = KeyFactory.getInstance("DSA");
+        } catch (NoSuchAlgorithmException e) {
+            e.printStackTrace();
+        }
+        PublicUserProfile userProfile = null;
+        try {
+            DSAPublicKeySpec dsaKey = factory.getKeySpec(mainKeyPair.getPublic(), DSAPublicKeySpec.class);
+            userProfile = new PublicUserProfile(AppHelper.getPeerID(), peerDHT.peerAddress(), new DSAKey(dsaKey.getQ(), dsaKey.getP(), dsaKey.getY(), dsaKey.getG()));
+        } catch (InvalidKeySpecException e) {
+            e.printStackTrace();
+        }
+        Data serializedUserProfile = null;
+        try {
+            serializedUserProfile = new Data(gson.toJson(userProfile))
+                    .protectEntry(mainKeyPair.getPrivate())
+                    .sign(keyPairManager.getKeyPair("mainSigningKeyPair"));
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        FuturePut futurePut = peerDHT.put(Number160.createHash(AppHelper.getPeerID() + "_profile"))
+                .data(serializedUserProfile)
+                .start()
+                .awaitUninterruptibly();
+        Log.i(LOG_TAG, futurePut.isSuccess() ? "# Profile successfully published!" : "# Profile publishing failed!");
+    }
 }
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
index e0369be..3d5b1c0 100644
--- a/app/src/main/java/io/github/chronosx88/influence/logic/StartChatLogic.java
+++ b/app/src/main/java/io/github/chronosx88/influence/logic/StartChatLogic.java
@@ -1,6 +1,5 @@
 package io.github.chronosx88.influence.logic;
 
-import android.util.Base64;
 import android.util.Log;
 
 import com.google.gson.Gson;
@@ -16,16 +15,16 @@ import net.tomp2p.peers.PeerAddress;
 import net.tomp2p.storage.Data;
 
 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.KeyPairManager;
 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.models.NewChatRequestMessage;
+import io.github.chronosx88.influence.models.PublicUserProfile;
 import io.github.chronosx88.influence.observable.MainObservable;
 
 public class StartChatLogic implements StartChatLogicContract {
@@ -43,35 +42,27 @@ public class StartChatLogic implements StartChatLogicContract {
     @Override
     public void sendStartChatMessage(String peerID) {
         new Thread(() -> {
-            JsonObject recipientPublicProfile = getPublicProfile(peerID);
+            PublicUserProfile 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);
+                AppHelper.getObservable().notifyUIObservers(jsonObject);
                 return;
             }
-            String peerAddressString = recipientPublicProfile.get("peerAddress").getAsString();
-            PeerAddress peerAddress = Serializer.deserializeObject(new String(Base64.decode(peerAddressString, Base64.URL_SAFE), StandardCharsets.UTF_8));
-            String chatID = UUID.randomUUID().toString();
+            PeerAddress recipientPeerAddress = getPublicProfile(peerID).getPeerAddress();
 
-            JsonObject jsonObject = new JsonObject();
-            jsonObject.addProperty("action", NetworkActions.START_CHAT);
-            jsonObject.addProperty("chatID", chatID);
-            jsonObject.addProperty("senderID", AppHelper.getPeerID());
-            // TODO: Append public key to new chat request (for encryption)
-            jsonObject.addProperty("senderAddress", PrepareData.prepareToStore(peerDHT.peerAddress()));
-
-            FuturePing ping = peerDHT.peer().ping().peerAddress(peerAddress).start().awaitUninterruptibly();
+            FuturePing ping = peerDHT.peer().ping().peerAddress(recipientPeerAddress).start().awaitUninterruptibly();
             if(ping.isSuccess()) {
-                peerDHT.peer().sendDirect(peerAddress).object(gson.toJson(jsonObject)).start();
+                peerDHT.peer().sendDirect(recipientPeerAddress).object(gson.toJson(new NewChatRequestMessage(AppHelper.getPeerID(), peerDHT.peerAddress()))).start();
             } else {
                 try {
+                    NewChatRequestMessage newChatRequestMessage = new NewChatRequestMessage(AppHelper.getPeerID(), peerDHT.peerAddress());
                     FuturePut futurePut = peerDHT
                             .put(Number160.createHash(peerID))
-                            .data(Number160.createHash(UUID.randomUUID().toString()), new Data(gson.toJson(jsonObject))
+                            .data(Number160.createHash(UUID.randomUUID().toString()), new Data(gson.toJson(newChatRequestMessage))
                                     .protectEntry(keyPairManager.openMainKeyPair())).start().awaitUninterruptibly();
                     if(futurePut.isSuccess()) {
-                        Log.i(LOG_TAG, "# Create new offline chat request is successful! ChatID: " + chatID);
+                        Log.i(LOG_TAG, "# Create new offline chat request is successful! ChatID: " + newChatRequestMessage.getChatID());
                     } else {
                         Log.e(LOG_TAG, "# Failed to create chat: " + futurePut.failedReason());
                     }
@@ -82,8 +73,8 @@ public class StartChatLogic implements StartChatLogicContract {
         }).start();
     }
 
-    private JsonObject getPublicProfile(String peerID) {
-        JsonObject publicProfile;
+    private PublicUserProfile getPublicProfile(String peerID) {
+        PublicUserProfile publicProfile = null;
         FutureGet futureGetProfile = peerDHT.get(Number160.createHash(peerID + "_profile")).start().awaitUninterruptibly();
         if (futureGetProfile.isSuccess()) {
             String jsonString = null;
@@ -94,7 +85,13 @@ public class StartChatLogic implements StartChatLogicContract {
             } catch (IOException e) {
                 e.printStackTrace();
             }
-            publicProfile = new JsonParser().parse(jsonString).getAsJsonObject();
+            try {
+                publicProfile = gson.fromJson((String) futureGetProfile.data().object(), PublicUserProfile.class);
+            } catch (ClassNotFoundException e) {
+                e.printStackTrace();
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
             return publicProfile;
         }
         return null;
diff --git a/app/src/main/java/io/github/chronosx88/influence/models/BasicNetworkMessage.java b/app/src/main/java/io/github/chronosx88/influence/models/BasicNetworkMessage.java
new file mode 100644
index 0000000..0ea1fcc
--- /dev/null
+++ b/app/src/main/java/io/github/chronosx88/influence/models/BasicNetworkMessage.java
@@ -0,0 +1,48 @@
+package io.github.chronosx88.influence.models;
+
+import net.tomp2p.peers.PeerAddress;
+
+import java.io.Serializable;
+
+/**
+ * Абстрактный класс-модель для любых сообщений, которые передаются по DHT-сети
+ */
+public class BasicNetworkMessage implements Serializable {
+    private int action;
+    private String senderID;
+    private PeerAddress senderPeerAddress;
+
+    public BasicNetworkMessage() {
+        //
+    }
+
+    public BasicNetworkMessage(int action, String senderID, PeerAddress senderPeerAddress) {
+        this.action = action;
+        this.senderID = senderID;
+        this.senderPeerAddress = senderPeerAddress;
+    }
+
+    public int getAction() {
+        return action;
+    }
+
+    public String getSenderID() {
+        return senderID;
+    }
+
+    public PeerAddress getSenderPeerAddress() {
+        return senderPeerAddress;
+    }
+
+    public void setAction(int action) {
+        this.action = action;
+    }
+
+    public void setSenderID(String senderID) {
+        this.senderID = senderID;
+    }
+
+    public void setSenderPeerAddress(PeerAddress senderPeerAddress) {
+        this.senderPeerAddress = senderPeerAddress;
+    }
+}
diff --git a/app/src/main/java/io/github/chronosx88/influence/models/NewChatRequestMessage.java b/app/src/main/java/io/github/chronosx88/influence/models/NewChatRequestMessage.java
new file mode 100644
index 0000000..beb4f55
--- /dev/null
+++ b/app/src/main/java/io/github/chronosx88/influence/models/NewChatRequestMessage.java
@@ -0,0 +1,25 @@
+package io.github.chronosx88.influence.models;
+
+import net.tomp2p.peers.PeerAddress;
+
+import java.io.Serializable;
+import java.util.UUID;
+
+import io.github.chronosx88.influence.helpers.actions.NetworkActions;
+
+public class NewChatRequestMessage extends BasicNetworkMessage implements Serializable {
+    private String chatID;
+
+    public NewChatRequestMessage(String senderID, PeerAddress senderPeerAddress) {
+        super(NetworkActions.CREATE_CHAT, senderID, senderPeerAddress);
+        this.chatID = UUID.randomUUID().toString();
+    }
+
+    public String getChatID() {
+        return chatID;
+    }
+
+    public void setChatID(String chatID) {
+        this.chatID = chatID;
+    }
+}
diff --git a/app/src/main/java/io/github/chronosx88/influence/models/PublicUserProfile.java b/app/src/main/java/io/github/chronosx88/influence/models/PublicUserProfile.java
new file mode 100644
index 0000000..62e075b
--- /dev/null
+++ b/app/src/main/java/io/github/chronosx88/influence/models/PublicUserProfile.java
@@ -0,0 +1,46 @@
+package io.github.chronosx88.influence.models;
+
+import net.tomp2p.peers.PeerAddress;
+
+import java.io.Serializable;
+
+import io.github.chronosx88.influence.helpers.DSAKey;
+
+/**
+ * Класс-модель публичного профиля для размещения в DHT-сети
+ */
+public class PublicUserProfile implements Serializable {
+    private String userName;
+    private PeerAddress peerAddress;
+    private DSAKey publicKey;
+
+    public PublicUserProfile(String userName, PeerAddress peerAddress, DSAKey publicKey) {
+        this.userName = userName;
+        this.peerAddress = peerAddress;
+        this.publicKey = publicKey;
+    }
+
+    public String getUserName() {
+        return userName;
+    }
+
+    public PeerAddress getPeerAddress() {
+        return peerAddress;
+    }
+
+    public void setPeerAddress(PeerAddress peerAddress) {
+        this.peerAddress = peerAddress;
+    }
+
+    public void setUserName(String userName) {
+        this.userName = userName;
+    }
+
+    public DSAKey getPublicKey() {
+        return publicKey;
+    }
+
+    public void setPublicKey(DSAKey publicKey) {
+        this.publicKey = publicKey;
+    }
+}
diff --git a/app/src/main/java/io/github/chronosx88/influence/models/daos/ChatDao.java b/app/src/main/java/io/github/chronosx88/influence/models/daos/ChatDao.java
index c30a23e..1be1436 100644
--- a/app/src/main/java/io/github/chronosx88/influence/models/daos/ChatDao.java
+++ b/app/src/main/java/io/github/chronosx88/influence/models/daos/ChatDao.java
@@ -18,6 +18,9 @@ public interface ChatDao {
     @Query("SELECT * FROM chats")
     List<ChatEntity> getAllChats();
 
-    @Query("SELECT * FROM chats WHERE id = :chatID")
-    List<ChatEntity> getChatByID(String chatID);
+    @Query("SELECT * FROM chats WHERE chatID = :chatID")
+    List<ChatEntity> getChatByChatID(String chatID);
+
+    @Query("SELECT * FROM chats WHERE id = :id")
+    List<ChatEntity> getChatByID(String id);
 }
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 785d51e..a698ce9 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
@@ -1,5 +1,10 @@
 package io.github.chronosx88.influence.models.roomEntities;
 
+import net.tomp2p.peers.PeerAddress;
+
+import java.util.ArrayList;
+import java.util.Collections;
+
 import androidx.annotation.NonNull;
 import androidx.room.ColumnInfo;
 import androidx.room.Entity;
@@ -7,19 +12,20 @@ import androidx.room.PrimaryKey;
 
 @Entity(tableName = "chats")
 public class ChatEntity {
-    @NonNull @PrimaryKey String id;
+    @PrimaryKey(autoGenerate = true) public int id;
+    @ColumnInfo public String chatID;
     @ColumnInfo public String name;
-    @ColumnInfo public String peerAddresses;
+    @ColumnInfo public byte[] peerAddresses;
     @ColumnInfo public String keyPairID;
 
-    public ChatEntity(String id, String name, String peerAddresses, String keyPairID) {
-        this.id = id;
+    public ChatEntity(String chatID, String name, String keyPairID, byte[] peerAddresses) {
+        this.chatID = chatID;
         this.name = name;
         this.peerAddresses = peerAddresses;
         this.keyPairID = keyPairID;
     }
 
-    public String getId() {
+    public int getId() {
         return id;
     }
 
@@ -27,9 +33,13 @@ public class ChatEntity {
         return keyPairID;
     }
 
-    public String getPeerAddress() { return peerAddresses; }
+    public byte[] getPeerAddress() { return peerAddresses; }
 
     public String getName() {
         return name;
     }
+
+    public String getChatID() {
+        return chatID;
+    }
 }
diff --git a/app/src/main/java/io/github/chronosx88/influence/models/roomEntities/MessageEntity.java b/app/src/main/java/io/github/chronosx88/influence/models/roomEntities/MessageEntity.java
index a9fd45d..29c5cdd 100644
--- a/app/src/main/java/io/github/chronosx88/influence/models/roomEntities/MessageEntity.java
+++ b/app/src/main/java/io/github/chronosx88/influence/models/roomEntities/MessageEntity.java
@@ -8,14 +8,16 @@ import androidx.room.PrimaryKey;
 @Entity(tableName = "messages")
 public class MessageEntity {
     @NonNull @PrimaryKey String id;
-    @ColumnInfo String chatID;
-    @ColumnInfo String sender;
-    @ColumnInfo String text;
+    @ColumnInfo public String chatID;
+    @ColumnInfo public String sender;
+    @ColumnInfo public String date;
+    @ColumnInfo public String text;
 
-    public MessageEntity(String id, String chatID, String sender, String text) {
+    public MessageEntity(String id, String chatID, String sender, String date, String text) {
         this.id = id;
         this.chatID = chatID;
         this.sender = sender;
+        this.date = date;
         this.text = text;
     }
 
diff --git a/app/src/main/java/io/github/chronosx88/influence/observable/MainObservable.java b/app/src/main/java/io/github/chronosx88/influence/observable/MainObservable.java
index b0adb5f..16ff221 100644
--- a/app/src/main/java/io/github/chronosx88/influence/observable/MainObservable.java
+++ b/app/src/main/java/io/github/chronosx88/influence/observable/MainObservable.java
@@ -4,6 +4,7 @@ import com.google.gson.JsonObject;
 
 import java.util.ArrayList;
 
+import io.github.chronosx88.influence.contracts.observer.NetworkObserver;
 import io.github.chronosx88.influence.contracts.observer.Observable;
 import io.github.chronosx88.influence.contracts.observer.Observer;
 
@@ -12,70 +13,44 @@ public class MainObservable implements Observable {
     public static final int OTHER_ACTIONS_CHANNEL = 1;
 
     private ArrayList<Observer> uiObservers;
-    private ArrayList<Observer> otherObservers;
+    private ArrayList<NetworkObserver> networkObservers;
 
     public MainObservable() {
         this.uiObservers = new ArrayList<>();
-        this.otherObservers = new ArrayList<>();
+        this.networkObservers = new ArrayList<>();
     }
 
     @Override
-    public void register(Observer observer, int channelID) {
-        switch (channelID) {
-            case UI_ACTIONS_CHANNEL: {
-                uiObservers.add(observer);
-                break;
-            }
+    public void register(Observer observer) {
+        uiObservers.add(observer);
+    }
 
-            case OTHER_ACTIONS_CHANNEL: {
-                otherObservers.add(observer);
-                break;
-            }
+    @Override
+    public void register(NetworkObserver observer) {
+        networkObservers.add(observer);
+    }
 
-            default: {
-                otherObservers.add(observer);
-                break;
-            }
+    @Override
+    public void unregister(Observer observer) {
+        uiObservers.remove(observer);
+    }
+
+    @Override
+    public void unregister(NetworkObserver observer) {
+        networkObservers.remove(observer);
+    }
+
+    @Override
+    public void notifyUIObservers(JsonObject jsonObject) {
+        for (Observer observer : uiObservers) {
+            observer.handleEvent(jsonObject);
         }
     }
 
     @Override
-    public void unregister(Observer observer, int channelID) {
-        switch (channelID) {
-            case UI_ACTIONS_CHANNEL: {
-                uiObservers.remove(observer);
-                break;
-            }
-
-            case OTHER_ACTIONS_CHANNEL: {
-                otherObservers.remove(observer);
-                break;
-            }
-        }
-    }
-
-    @Override
-    public void notifyObservers(JsonObject jsonObject, int channelID) {
-        switch (channelID) {
-            case UI_ACTIONS_CHANNEL: {
-                for (Observer observer : uiObservers) {
-                    observer.handleEvent(jsonObject);
-                }
-                break;
-            }
-
-            case OTHER_ACTIONS_CHANNEL: {
-                for (Observer observer : otherObservers) {
-                    observer.handleEvent(jsonObject);
-                }
-                break;
-            }
-            default: {
-                for (Observer observer : otherObservers) {
-                    observer.handleEvent(jsonObject);
-                }
-                break;
-            }
+    public void notifyNetworkObservers(Object object) {
+        for (NetworkObserver observer : networkObservers) {
+            observer.handleEvent(object);
         }
     }
 }
diff --git a/app/src/main/java/io/github/chronosx88/influence/presenters/ChatListPresenter.java b/app/src/main/java/io/github/chronosx88/influence/presenters/ChatListPresenter.java
index aaf2985..ab9b8e2 100644
--- a/app/src/main/java/io/github/chronosx88/influence/presenters/ChatListPresenter.java
+++ b/app/src/main/java/io/github/chronosx88/influence/presenters/ChatListPresenter.java
@@ -22,13 +22,12 @@ public class ChatListPresenter implements ChatListPresenterContract, Observer {
         chatListAdapter = new ChatListAdapter();
         this.logic = new ChatListLogic();
         this.view.setRecycleAdapter(chatListAdapter);
-        AppHelper.getObservable().register(this, MainObservable.UI_ACTIONS_CHANNEL);
+        AppHelper.getObservable().register(this);
     }
 
     @Override
     public void updateChatList() {
-        chatListAdapter.setChatList(logic.loadAllChats());
-        chatListAdapter.notifyDataSetChanged();
+        view.updateChatList(chatListAdapter, logic.loadAllChats());
     }
 
     @Override
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
index d7e9c15..707c76d 100644
--- a/app/src/main/java/io/github/chronosx88/influence/presenters/StartChatPresenter.java
+++ b/app/src/main/java/io/github/chronosx88/influence/presenters/StartChatPresenter.java
@@ -18,7 +18,7 @@ public class StartChatPresenter implements StartChatPresenterContract, Observer
     public StartChatPresenter(StartChatViewContract view) {
         this.view = view;
         this.logic = new StartChatLogic();
-        AppHelper.getObservable().register(this, MainObservable.UI_ACTIONS_CHANNEL);
+        AppHelper.getObservable().register(this);
     }
 
     @Override
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 4778f21..7d9b2ed 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
@@ -70,7 +70,7 @@ public class MainActivity extends AppCompatActivity implements Observer, MainVie
                 .commit();
 
         presenter = new MainPresenter(this);
-        AppHelper.getObservable().register(this, MainObservable.UI_ACTIONS_CHANNEL);
+        AppHelper.getObservable().register(this);
 
         progressDialog = new ProgressDialog(MainActivity.this, R.style.AlertDialogTheme);
         progressDialog.setCancelable(false);
@@ -83,7 +83,7 @@ public class MainActivity extends AppCompatActivity implements Observer, MainVie
     protected void onDestroy() {
         super.onDestroy();
         presenter.onDestroy();
-        AppHelper.getObservable().unregister(this, MainObservable.UI_ACTIONS_CHANNEL);
+        AppHelper.getObservable().unregister(this);
     }
 
     @Override
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 522e581..2551b75 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
@@ -7,6 +7,8 @@ import android.view.ViewGroup;
 
 import com.google.gson.JsonObject;
 
+import java.util.List;
+
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.fragment.app.Fragment;
@@ -19,6 +21,7 @@ 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.actions.UIActions;
+import io.github.chronosx88.influence.models.roomEntities.ChatEntity;
 import io.github.chronosx88.influence.observable.MainObservable;
 import io.github.chronosx88.influence.presenters.ChatListPresenter;
 
@@ -29,7 +32,7 @@ public class ChatListFragment extends Fragment implements ChatListViewContract,
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-        AppHelper.getObservable().register(this, MainObservable.UI_ACTIONS_CHANNEL);
+        AppHelper.getObservable().register(this);
     }
 
     @Override
@@ -66,4 +69,12 @@ public class ChatListFragment extends Fragment implements ChatListViewContract,
             }
         }
     }
+
+    @Override
+    public void updateChatList(ChatListAdapter adapter, List<ChatEntity> chats) {
+        getActivity().runOnUiThread(() -> {
+            adapter.setChatList(chats);
+            adapter.notifyDataSetChanged();
+        });
+    }
 }
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 7302748..91e216d 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
@@ -5,6 +5,7 @@ import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
+import android.widget.Button;
 
 import com.google.android.material.snackbar.Snackbar;
 import com.google.android.material.textfield.TextInputLayout;
@@ -14,10 +15,13 @@ import androidx.annotation.Nullable;
 import androidx.fragment.app.Fragment;
 import io.github.chronosx88.influence.R;
 import io.github.chronosx88.influence.contracts.startchat.StartChatViewContract;
+import io.github.chronosx88.influence.presenters.StartChatPresenter;
 
 public class StartChatFragment extends Fragment implements StartChatViewContract {
     private TextInputLayout textInputPeerID;
     private ProgressDialog progressDialog;
+    private Button createChatButton;
+    private StartChatPresenter presenter;
 
     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
@@ -28,10 +32,15 @@ public class StartChatFragment extends Fragment implements StartChatViewContract
     @Override
     public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
         super.onViewCreated(view, savedInstanceState);
+        presenter = new StartChatPresenter(this);
         textInputPeerID = view.findViewById(R.id.textInputPeerID);
         progressDialog = new ProgressDialog(getActivity(), R.style.AlertDialogTheme);
         progressDialog.setCancelable(false);
         progressDialog.setProgressStyle(android.R.style.Widget_ProgressBar_Small);
+        createChatButton = view.findViewById(R.id.create_chat_button);
+        createChatButton.setOnClickListener((v) -> {
+            presenter.startChatWithPeer(textInputPeerID.getEditText().getText().toString());
+        });
     }
 
     @Override
diff --git a/app/src/main/res/layout/start_chat_fragment.xml b/app/src/main/res/layout/start_chat_fragment.xml
index bf08408..5243f66 100644
--- a/app/src/main/res/layout/start_chat_fragment.xml
+++ b/app/src/main/res/layout/start_chat_fragment.xml
@@ -24,6 +24,7 @@
         </com.google.android.material.textfield.TextInputLayout>
 
         <Button
+            android:id="@+id/create_chat_button"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:text="Создать чат"/>