diff --git a/dragonion_server/modules/server/handlers/managers/connection.py b/dragonion_server/modules/server/handlers/managers/connection.py
index b2ec10a..8ccf330 100644
--- a/dragonion_server/modules/server/handlers/managers/connection.py
+++ b/dragonion_server/modules/server/handlers/managers/connection.py
@@ -15,12 +15,22 @@ class Connection(object):
     public_key: str
 
     async def send_webmessage(self, obj: webmessages_union):
+        """
+        Sends WebMessage object to this connection
+        :param obj: Should be some type of WebMessage
+        :return: 
+        """
         await self.ws.send_text(obj.to_json())
 
     async def send_error(
             self,
             error_message: webmessage_error_message_literal
     ):
+        """
+        Sends error with specified messages
+        :param error_message: See webmessage_error_message_literal for available
+        :return: 
+        """
         await self.send_webmessage(
             WebErrorMessage(
                 error_message=error_message
@@ -28,6 +38,10 @@ class Connection(object):
         )
 
     async def send_connect(self):
+        """
+        When new user is connected, send info about user
+        :return: 
+        """
         await self.send_webmessage(
             WebUserMessage(
                 type="connect",
diff --git a/dragonion_server/modules/server/handlers/managers/room.py b/dragonion_server/modules/server/handlers/managers/room.py
index 41a4e42..3021153 100644
--- a/dragonion_server/modules/server/handlers/managers/room.py
+++ b/dragonion_server/modules/server/handlers/managers/room.py
@@ -18,6 +18,12 @@ class Room(object):
     connections: Dict[str, Connection] = {}
 
     async def accept_connection(self, ws: WebSocket) -> Connection:
+        """
+        Accepts connection, checks username availability and adds it to dict of 
+        connections 
+        :param ws: Websocket of connection 
+        :return: 
+        """
         print('Incoming connection')
         await ws.accept()
         connection = Connection(
@@ -36,11 +42,22 @@ class Room(object):
         return connection
 
     async def broadcast_webmessage(self, obj: webmessages_union):
+        """
+        Broadcasts WebMessages to all connections in room
+        :param obj:  
+        :return: 
+        """
         for connection in self.connections.values():
             print(f'Sending to {connection.username}: {obj}')
             await connection.send_webmessage(obj)
 
     async def broadcast_message(self, from_username: str, message: str):
+        """
+        Broadcasts message to every user in room
+        :param from_username: User that sent message
+        :param message: content
+        :return: 
+        """
         await self.broadcast_webmessage(
             WebMessageMessage(
                 username=from_username,
@@ -49,6 +66,11 @@ class Room(object):
         )
 
     async def broadcast_notification(self, message: str):
+        """
+        Broadcasts notification from server
+        :param message: Content
+        :return: 
+        """
         await self.broadcast_webmessage(
             WebNotificationMessage(
                 message=message
@@ -59,6 +81,11 @@ class Room(object):
             self,
             error_message: webmessage_error_message_literal
     ):
+        """
+        Broadcasts server error
+        :param error_message: See webmessage_error_message_literal
+        :return: 
+        """
         await self.broadcast_webmessage(
             WebErrorMessage(
                 error_message=error_message
@@ -66,6 +93,11 @@ class Room(object):
         )
 
     async def broadcast_user_disconnected(self, username: str):
+        """
+        Broadcasts that user is disconnected
+        :param username: Username of user that disconnected
+        :return: 
+        """
         await self.broadcast_webmessage(
             WebUserMessage(
                 type="disconnect",
@@ -74,11 +106,24 @@ class Room(object):
         )
 
     async def get_connection_by(self, attribute: str, value: str) -> Connection | None:
+        """
+        Search for connection by attribute and value in it
+        :param attribute: 
+        :param value: 
+        :return: 
+        """
         for connection in self.connections.values():
             if getattr(connection, attribute) == value:
                 return connection
 
     async def disconnect(self, connection: Connection, close_reason: str | None = None):
+        """
+        Disconnects by connection object. 
+        :param connection: Object of connection. 
+                           It can be obtained using get_connection_by
+        :param close_reason: Reason if exists
+        :return: 
+        """
         if connection not in self.connections.values():
             return
 
diff --git a/dragonion_server/modules/server/handlers/managers/service.py b/dragonion_server/modules/server/handlers/managers/service.py
index 6b57f36..a4ed9fc 100644
--- a/dragonion_server/modules/server/handlers/managers/service.py
+++ b/dragonion_server/modules/server/handlers/managers/service.py
@@ -29,6 +29,11 @@ class Service(object):
             await room.broadcast_error(error_message)
 
     async def get_room_by_connection(self, connection: Connection) -> Room:
+        """
+        Searches for room by valid connection object in it
+        :param connection: Connection in unknown room to search
+        :return: 
+        """
         for room in self.rooms.values():
             if connection in room.connections.values():
                 return room
@@ -36,11 +41,23 @@ class Service(object):
     async def get_connection_by_attribute(
             self, attribute: str, value: str
     ) -> Connection:
+        """
+        Gets connection in some room by attribute and value in it
+        :param attribute: 
+        :param value: 
+        :return: 
+        """
         for room in self.rooms.values():
             if connection := await room.get_connection_by(attribute, value):
                 return connection
 
     async def close_room(self, room_name: str, reason: str = 'Unknown reason'):
+        """
+        Closes all connections in room
+        :param room_name: Close name
+        :param reason: Reason to close room, default is Unknown reason
+        :return: 
+        """
         room = self.rooms.get(room_name)
         if room is None:
             return
diff --git a/dragonion_server/modules/server/handlers/websocket_server.py b/dragonion_server/modules/server/handlers/websocket_server.py
index aecb704..d73ba22 100644
--- a/dragonion_server/modules/server/handlers/websocket_server.py
+++ b/dragonion_server/modules/server/handlers/websocket_server.py
@@ -10,6 +10,12 @@ service = Service()
 
 
 async def serve_websocket(websocket: WebSocket, room_name: str):
+    """
+    Serves websocket
+    :param websocket: Ws to serve 
+    :param room_name: Room name to connect ws to
+    :return: 
+    """
     print(f'Connection opened room {room_name}')
     room = await service.get_room(room_name)
     connection = await room.accept_connection(websocket)
diff --git a/dragonion_server/modules/server/integration.py b/dragonion_server/modules/server/integration.py
index ed96fdd..a386892 100644
--- a/dragonion_server/modules/server/integration.py
+++ b/dragonion_server/modules/server/integration.py
@@ -8,6 +8,12 @@ from rich import print
 
 
 def integrate_onion(port: int, name: str) -> Onion:
+    """
+    Starts onion service, writes it to config 
+    :param port: Port, where local service is started
+    :param name: Name of service to get or write to config
+    :return: Onion object, that is connected and service is started
+    """
     onion = Onion()
 
     try:
diff --git a/dragonion_server/modules/server/server.py b/dragonion_server/modules/server/server.py
index 83da1aa..2f9cdd1 100644
--- a/dragonion_server/modules/server/server.py
+++ b/dragonion_server/modules/server/server.py
@@ -6,6 +6,12 @@ from .routes import router
 
 
 def get_app(port: int, name: str) -> FastAPI:
+    """
+    Creates FastAPI object and runs integrate_onion
+    :param port: Must be same with port on which uvicorn is running 
+    :param name: Name of service
+    :return: FastAPI object with onion.cleanup function on shutdown
+    """
     onion = integrate_onion(port, name)
     return FastAPI(
         title=f'dragonion-server: {name}',
@@ -15,6 +21,12 @@ def get_app(port: int, name: str) -> FastAPI:
 
 
 def run(name: str, port: int | None = get_available_port()):
+    """
+    Runs service with specified name and starts onion
+    :param name: Name of service
+    :param port: Port where to start service, if not specified - gets random available
+    :return: 
+    """
     if port is None:
         port = get_available_port()
     app = get_app(port, name)
diff --git a/dragonion_server/utils/core/dirs.py b/dragonion_server/utils/core/dirs.py
index b08aa6a..dba8985 100644
--- a/dragonion_server/utils/core/dirs.py
+++ b/dragonion_server/utils/core/dirs.py
@@ -4,16 +4,6 @@ import shutil
 import sys
 
 
-def dir_size(start_path):
-    total_size = 0
-    for dirpath, dirnames, filenames in os.walk(start_path):
-        for f in filenames:
-            fp = os.path.join(dirpath, f)
-            if not os.path.islink(fp):
-                total_size += os.path.getsize(fp)
-    return total_size
-
-
 def get_resource_path(filename):
     application_path = 'resources'
 
diff --git a/dragonion_server/utils/core/strings.py b/dragonion_server/utils/core/strings.py
deleted file mode 100644
index f6983b5..0000000
--- a/dragonion_server/utils/core/strings.py
+++ /dev/null
@@ -1,52 +0,0 @@
-import os
-import hashlib
-import base64
-import time
-
-
-def random_string(num_bytes, output_len=None):
-    b = os.urandom(num_bytes)
-    h = hashlib.sha256(b).digest()[:16]
-    s = base64.b32encode(h).lower().replace(b"=", b"").decode("utf-8")
-    if not output_len:
-        return s
-    return s[:output_len]
-
-
-def human_readable_filesize(b):
-    thresh = 1024.0
-    if b < thresh:
-        return "{:.1f} B".format(b)
-    units = ("KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "ZiB", "YiB")
-    u = 0
-    b /= thresh
-    while b >= thresh:
-        b /= thresh
-        u += 1
-    return "{:.1f} {}".format(b, units[u])
-
-
-def format_seconds(seconds):
-    days, seconds = divmod(seconds, 86400)
-    hours, seconds = divmod(seconds, 3600)
-    minutes, seconds = divmod(seconds, 60)
-
-    human_readable = []
-    if days:
-        human_readable.append("{:.0f}d".format(days))
-    if hours:
-        human_readable.append("{:.0f}h".format(hours))
-    if minutes:
-        human_readable.append("{:.0f}m".format(minutes))
-    if seconds or not human_readable:
-        human_readable.append("{:.0f}s".format(seconds))
-    return "".join(human_readable)
-
-
-def estimated_time_remaining(bytes_downloaded, total_bytes, started):
-    now = time.time()
-    time_elapsed = now - started
-    download_rate = bytes_downloaded / time_elapsed
-    remaining_bytes = total_bytes - bytes_downloaded
-    eta = remaining_bytes / download_rate
-    return format_seconds(eta)
diff --git a/dragonion_server/utils/generated_auth/db.py b/dragonion_server/utils/generated_auth/db.py
index b61e190..00f201e 100644
--- a/dragonion_server/utils/generated_auth/db.py
+++ b/dragonion_server/utils/generated_auth/db.py
@@ -2,6 +2,11 @@ import sqlitedict
 
 
 class AuthFile(sqlitedict.SqliteDict):
+    """
+    Valid AuthFile has fields:
+    host - .onion url of service
+    auth - v3 onion auth string in format, that can be written to .auth_private file
+    """
     def __init__(self, service):
         super().__init__(
             filename=f'{service}.auth',
diff --git a/dragonion_server/utils/onion/onion.py b/dragonion_server/utils/onion/onion.py
index ea0a710..d16c17b 100644
--- a/dragonion_server/utils/onion/onion.py
+++ b/dragonion_server/utils/onion/onion.py
@@ -134,6 +134,12 @@ class Onion(object):
 
     @staticmethod
     def write_onion_service(name: str, port: int):
+        """
+        Writes onion service to config
+        :param name: Name of service
+        :param port: Port of real service on local machine to proxy
+        :return: ServiceModel object
+        """
         if name in services.keys():
             service: config.models.ServiceModel = services[name]
             service.port = port
diff --git a/dragonion_server/utils/onion/tor_downloader.py b/dragonion_server/utils/onion/tor_downloader.py
index 1ec33e0..7b16e53 100644
--- a/dragonion_server/utils/onion/tor_downloader.py
+++ b/dragonion_server/utils/onion/tor_downloader.py
@@ -8,6 +8,10 @@ from typing import Literal
 
 
 def get_latest_version() -> str:
+    """
+    Gets latest non-alfa version name from dist.torproject.org
+    :return:
+    """
     r = requests.get('https://dist.torproject.org/torbrowser/').text
 
     results = re.findall(r'<a href=".+/">(.+)/</a>', r)
@@ -22,6 +26,10 @@ def get_build() -> Literal[
     'macos-x86_64',
     'macos-aarch64'
 ]:
+    """
+    Gets proper build name for your system
+    :return:
+    """
     if sys.platform == 'win32':
         return 'windows-x86_64'
     elif sys.platform == 'linux':
@@ -38,18 +46,32 @@ def get_build() -> Literal[
 
 def get_tor_expert_bundles(version: str = get_latest_version(),
                            platform: str = get_build()):
+    """
+    Returns a link for downloading tor expert bundle by version and platform
+    :param version: Tor expert bundle version that exists in dist.torproject.org
+    :param platform: Build type based on platform and arch, can be generated using
+                     get_build()
+    :return:
+    """
     return f'https://dist.torproject.org/torbrowser/{version}/tor-expert-bundle-' \
            f'{version}-{platform}.tar.gz'
 
 
 def download_tor(url: str = get_tor_expert_bundles(), dist: str = 'tor'):
+    """
+    Downloads tor from url and unpacks it to specified directory. Note, that
+    it doesn't unpack only tor executable to dist folder, but creates there
+    tor folder, where tor executable and libs are stored
+    :param url: Direct link for downloading
+    :param dist: Directory where to unpack archive (tor folder will appear there)
+    :return:
+    """
     if not os.path.exists(dist):
         os.makedirs(dist)
 
     (tar := tarfile.open(fileobj=io.BytesIO(requests.get(url).content),
                          mode='r:gz')).extractall(
-        members=
-        [
+        members=[
             tarinfo
             for tarinfo
             in tar.getmembers()