diff --git a/source/network/Client.py b/source/network/Client.py
index 3671d45..f7a7089 100644
--- a/source/network/Client.py
+++ b/source/network/Client.py
@@ -4,7 +4,6 @@ from typing import TYPE_CHECKING, Any
 from source.gui import scene
 from source.network import game_network
 from source.network.packet import PacketUsername, PacketSettings
-from source.network.packet.abc import Packet
 from source.utils import StoppableThread
 from source.utils.thread import in_pyglet_context
 
@@ -35,7 +34,7 @@ class Client(StoppableThread):
             print(f"[Client] Connecté avec {connection}")
 
             settings: Any = PacketSettings.from_connection(connection)
-            PacketUsername(username=self.username).instance_send_connection(connection)
+            PacketUsername(username=self.username).send_data_connection(connection)
             packet_username = PacketUsername.from_connection(connection)
 
             game_scene = in_pyglet_context(
diff --git a/source/network/Host.py b/source/network/Host.py
index 5b0cb2a..55338e0 100644
--- a/source/network/Host.py
+++ b/source/network/Host.py
@@ -44,9 +44,9 @@ class Host(StoppableThread):
 
             print(f"[Serveur] Connecté avec {address}")
 
-            self.settings.instance_send_connection(connection)
+            self.settings.send_data_connection(connection)
             packet_username = PacketUsername.from_connection(connection)
-            PacketUsername(username=self.username).instance_send_connection(connection)
+            PacketUsername(username=self.username).send_data_connection(connection)
 
             game_scene = in_pyglet_context(
                 self.window.set_scene,
diff --git a/source/network/packet/PacketBoatPlaced.py b/source/network/packet/PacketBoatPlaced.py
index 3af2f82..f3864f9 100644
--- a/source/network/packet/PacketBoatPlaced.py
+++ b/source/network/packet/PacketBoatPlaced.py
@@ -1,17 +1,17 @@
 from dataclasses import dataclass
 
-from source.network.packet.abc import Packet
+from source.network.packet.abc import SimplePacket
 
 
 @dataclass
-class PacketBoatPlaced(Packet):
+class PacketBoatPlaced(SimplePacket):
     """
     A packet that signal that all the boat of the player have been placed
     """
 
-    def to_bytes(self):
+    def to_bytes(self) -> bytes:
         return b""
 
     @classmethod
-    def from_bytes(cls, data: bytes):
+    def from_bytes(cls, data: bytes) -> "PacketBoatPlaced":
         return cls()
diff --git a/source/network/packet/PacketBombPlaced.py b/source/network/packet/PacketBombPlaced.py
index 7e30149..2da032f 100644
--- a/source/network/packet/PacketBombPlaced.py
+++ b/source/network/packet/PacketBombPlaced.py
@@ -2,12 +2,12 @@ import struct
 
 from dataclasses import dataclass, field
 
-from source.network.packet.abc import Packet
+from source.network.packet.abc import SimplePacket
 from source.type import Point2D
 
 
 @dataclass
-class PacketBombPlaced(Packet):
+class PacketBombPlaced(SimplePacket):
     """
     A packet that signal that a bomb have been placed on the board
     """
@@ -16,11 +16,11 @@ class PacketBombPlaced(Packet):
 
     packet_format: str = ">BB"
 
-    def to_bytes(self):
+    def to_bytes(self) -> bytes:
         x, y = self.position
         return struct.pack(self.packet_format, x, y)
 
     @classmethod
-    def from_bytes(cls, data: bytes):
+    def from_bytes(cls, data: bytes) -> "PacketBombPlaced":
         x, y = struct.unpack(cls.packet_format, data)
         return cls(position=(x, y))
diff --git a/source/network/packet/PacketBombState.py b/source/network/packet/PacketBombState.py
index cb1fc79..4389ae1 100644
--- a/source/network/packet/PacketBombState.py
+++ b/source/network/packet/PacketBombState.py
@@ -2,12 +2,12 @@ import struct
 from dataclasses import dataclass, field
 
 from source.core.enums import BombState
-from source.network.packet.abc import Packet
+from source.network.packet.abc import SimplePacket
 from source.type import Point2D
 
 
 @dataclass
-class PacketBombState(Packet):
+class PacketBombState(SimplePacket):
     """
     A packet that signal how a bomb exploded on the board
     """
@@ -17,11 +17,11 @@ class PacketBombState(Packet):
 
     packet_format: str = ">BBb"
 
-    def to_bytes(self):
+    def to_bytes(self) -> bytes:
         x, y = self.position
         return struct.pack(self.packet_format, x, y, self.bomb_state.value)
 
     @classmethod
-    def from_bytes(cls, data: bytes):
+    def from_bytes(cls, data: bytes) -> "PacketBombState":
         x, y, bomb_state = struct.unpack(cls.packet_format, data)
         return cls(position=(x, y), bomb_state=BombState(bomb_state))
diff --git a/source/network/packet/PacketChat.py b/source/network/packet/PacketChat.py
index 014b573..130e581 100644
--- a/source/network/packet/PacketChat.py
+++ b/source/network/packet/PacketChat.py
@@ -1,40 +1,20 @@
-import socket
-import struct
 from dataclasses import dataclass, field
-from typing import Optional
 
-from source.network.packet.abc import Packet
+from source.network.packet.abc import VariableLengthBytesPacket
 
 
 @dataclass
-class PacketChat(Packet):
+class PacketChat(VariableLengthBytesPacket):
     """
     A packet that represent a message from the chat
     """
 
     message: str = field()
 
-    packet_format = ">I"
-
-    def to_bytes(self) -> bytes:
-        message: bytes = self.message.encode("utf-8")
-        message_len: int = len(message)
-
-        # envoie la taille du message, suivi des données du message
-        return struct.pack(f"{self.packet_format}{message_len}s", message_len, message)
+    @property
+    def data(self) -> bytes:
+        return self.message.encode("utf-8")
 
     @classmethod
-    def from_connection(cls, connection: socket.socket) -> "Packet":
-        message_len, *_ = struct.unpack(
-            cls.packet_format,
-            connection.recv(struct.calcsize(cls.packet_format))
-        )
-
-        format_: str = f">{message_len}s"
-
-        message, *_ = struct.unpack(
-            format_,
-            connection.recv(struct.calcsize(format_))
-        )
-
-        return cls(message=message.decode("utf-8"))
+    def from_bytes(cls, data: bytes) -> "PacketChat":
+        return cls(message=data.decode("utf-8"))
diff --git a/source/network/packet/PacketSettings.py b/source/network/packet/PacketSettings.py
index c0d75fa..d61d431 100644
--- a/source/network/packet/PacketSettings.py
+++ b/source/network/packet/PacketSettings.py
@@ -14,7 +14,7 @@ class PacketSettings(Packet):
 
     packet_format: str = ">BB?I"
 
-    def to_bytes(self):
+    def to_bytes(self) -> bytes:
         boats_len: int = len(self.boats_length)
 
         return struct.pack(
@@ -30,7 +30,7 @@ class PacketSettings(Packet):
         )
 
     @classmethod
-    def from_connection(cls, connection: socket.socket) -> "Packet":
+    def from_connection(cls, connection: socket.socket) -> "PacketSettings":
         grid_width, grid_height, host_start, boats_len = struct.unpack(
             cls.packet_format,
             connection.recv(struct.calcsize(cls.packet_format))
diff --git a/source/network/packet/PacketUsername.py b/source/network/packet/PacketUsername.py
index 93767dc..c7b71df 100644
--- a/source/network/packet/PacketUsername.py
+++ b/source/network/packet/PacketUsername.py
@@ -1,34 +1,17 @@
-import socket
-import struct
 from dataclasses import dataclass, field
 
-from source.network.packet.abc import Packet
+from source.network.packet.abc import VariableLengthBytesPacket
 
 
 @dataclass
-class PacketUsername(Packet):
+class PacketUsername(VariableLengthBytesPacket):
     username: str = field()
 
-    packet_format: str = ">I"
-
-    def to_bytes(self):
-        username = self.username.encode()
-        username_len = len(username)
-
-        return struct.pack(f"{self.packet_format}{username_len}s", username_len, username)
+    @property
+    def data(self) -> bytes:
+        return self.username.encode("utf-8")
 
     @classmethod
-    def from_connection(cls, connection: socket.socket) -> "PacketUsername":
-        username_len, *_ = struct.unpack(
-            cls.packet_format,
-            connection.recv(struct.calcsize(cls.packet_format))
-        )
+    def from_bytes(cls, data: bytes) -> "PacketUsername":
+        return cls(username=data.decode("utf-8"))
 
-        format_: str = f">{username_len}s"
-
-        username, *_ = struct.unpack(
-            format_,
-            connection.recv(struct.calcsize(format_))
-        )
-
-        return cls(username=username.decode("utf-8"))
diff --git a/source/network/packet/abc/Packet.py b/source/network/packet/abc/Packet.py
index f622bc3..4ad7eb0 100644
--- a/source/network/packet/abc/Packet.py
+++ b/source/network/packet/abc/Packet.py
@@ -1,18 +1,30 @@
 import socket
-import struct
 from abc import abstractmethod, ABC
+from inspect import isabstract
 from typing import Type, Optional
 
 
 class Packet(ABC):
-    packed_header: bytes
+    """
+    A packet that can be sent on a socket.
+    Multiple subtype of packet can be sent and received in an easier way.
+
+    The to_bytes and from_connection method need to be defined.
+    """
+
+    packet_types: set[Type["Packet"]] = set()
+
+    packet_header: bytes
     packet_id: int = 0
-    packet_format: str = ">"
 
     def __init_subclass__(cls, **kwargs):
         cls.packet_header = Packet.packet_id.to_bytes(1, "big")  # give a header to the newly created subclass
         Packet.packet_id = Packet.packet_id + 1  # increment by one the packet header for the next subclass
 
+        if not isabstract(cls):
+            # si la classe n'est pas abstraite, ajoute-la aux types de packet enregistré.
+            cls.packet_types.add(cls)
+
     @abstractmethod
     def to_bytes(self) -> bytes:
         """
@@ -23,14 +35,14 @@ class Packet(ABC):
 
     def send_connection(self, connection: socket.socket):
         """
-        Send the packet directly into a socket.
+        Send the packet data preceded with the header directly into a socket.
         :param connection: the socket where to send the packet to.
         """
         connection.send(self.packet_header + self.to_bytes())
 
-    def instance_send_connection(self, connection: socket.socket):
+    def send_data_connection(self, connection: socket.socket):
         """
-        Send the packet directly into a socket.
+        Send the packet data directly into a socket.
         :param connection: the socket where to send the packet to.
         """
         connection.send(self.to_bytes())
@@ -42,20 +54,12 @@ class Packet(ABC):
         :param packet_header: the header to find the corresponding subclass
         :return: the class associated with this header
         """
+
         return next(filter(
             lambda subcls: subcls.packet_header == packet_header,
-            cls.__subclasses__()
+            cls.packet_types
         ))
 
-    @classmethod
-    def from_bytes(cls, data: bytes) -> "Packet":
-        """
-        Convert a bytes object into a packet.
-        :param data: the data to convert into a packet. Should be "packet_size" long.
-        :return: a packet corresponding to the bytes.
-        """
-        pass
-
     @classmethod
     def type_from_connection(cls, connection: socket.socket) -> Optional[Type["Packet"]]:
         try:
@@ -67,12 +71,11 @@ class Packet(ABC):
         return cls.type_from_header(packet_header)
 
     @classmethod
+    @abstractmethod
     def from_connection(cls, connection: socket.socket) -> "Packet":
         """
         Receive a packet from a socket.
         :param connection: the socket where to get the data from
         :return: the packet, or None if there was nothing in the socket to receive.
         """
-
-        packet_size: int = struct.calcsize(cls.packet_format)
-        return cls.from_bytes(connection.recv(packet_size))
+        pass
diff --git a/source/network/packet/abc/SimplePacket.py b/source/network/packet/abc/SimplePacket.py
new file mode 100644
index 0000000..26a5039
--- /dev/null
+++ b/source/network/packet/abc/SimplePacket.py
@@ -0,0 +1,31 @@
+import socket
+import struct
+from abc import ABC, abstractmethod
+
+from source.network.packet.abc import Packet
+
+
+class SimplePacket(Packet, ABC):
+    """
+    A packet with a simple packet format.
+    Only the from_bytes and to_bytes method need to be implemented.
+    """
+
+    packet_format: str = ">"
+
+    @classmethod
+    @abstractmethod
+    def from_bytes(cls, data: bytes) -> "Packet":
+        """
+        Convert a bytes object into a packet.
+        :param data: the data to convert into a packet. Should be "packet_size" long.
+        :return: a packet corresponding to the bytes.
+        """
+        pass
+
+    @classmethod
+    def from_connection(cls, connection: socket.socket) -> "Packet":
+        # récupère la taille du packet en fonction du format et charge
+        # les données dans une nouvelle instance.
+        packet_size: int = struct.calcsize(cls.packet_format)
+        return cls.from_bytes(connection.recv(packet_size))
diff --git a/source/network/packet/abc/VariableLengthBytesPacket.py b/source/network/packet/abc/VariableLengthBytesPacket.py
new file mode 100644
index 0000000..741d950
--- /dev/null
+++ b/source/network/packet/abc/VariableLengthBytesPacket.py
@@ -0,0 +1,47 @@
+import socket
+import struct
+from abc import ABC, abstractmethod
+
+from source.network.packet.abc import Packet
+
+
+class VariableLengthBytesPacket(Packet, ABC):
+    """
+    A Packet that represent a single value that can be encoded with a variable length.
+    The property "data" and the method "from_bytes" need to be defined.
+    """
+
+    packet_format: str = ">I"
+
+    @property
+    @abstractmethod
+    def data(self) -> bytes:
+        pass
+
+    def to_bytes(self) -> bytes:
+        data: bytes = self.data
+        data_len: int = len(data)
+
+        # envoie la taille du message, suivi des données du message
+        return struct.pack(f"{self.packet_format}{data_len}s", data_len, data)
+
+    @classmethod
+    @abstractmethod
+    def from_bytes(cls, data: bytes):
+        pass
+
+    @classmethod
+    def from_connection(cls, connection: socket.socket) -> "Packet":
+        data_len, *_ = struct.unpack(
+            cls.packet_format,
+            connection.recv(struct.calcsize(cls.packet_format))
+        )
+
+        format_: str = f">{data_len}s"
+
+        data, *_ = struct.unpack(
+            format_,
+            connection.recv(struct.calcsize(format_))
+        )
+
+        return cls.from_bytes(data)
diff --git a/source/network/packet/abc/__init__.py b/source/network/packet/abc/__init__.py
index a7143d4..cea164c 100644
--- a/source/network/packet/abc/__init__.py
+++ b/source/network/packet/abc/__init__.py
@@ -1 +1,4 @@
 from .Packet import Packet
+
+from .SimplePacket import SimplePacket
+from .VariableLengthBytesPacket import VariableLengthBytesPacket