Source code for pyrogram.raw.functions.messages.request_encryption

#  Pyrogram - Telegram MTProto API Client Library for Python
#  Copyright (C) 2017-present Dan <https://github.com/delivrance>
#
#  This file is part of Pyrogram.
#
#  Pyrogram is free software: you can redistribute it and/or modify
#  it under the terms of the GNU Lesser General Public License as published
#  by the Free Software Foundation, either version 3 of the License, or
#  (at your option) any later version.
#
#  Pyrogram is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU Lesser General Public License for more details.
#
#  You should have received a copy of the GNU Lesser General Public License
#  along with Pyrogram.  If not, see <http://www.gnu.org/licenses/>.

from io import BytesIO

from pyrogram.raw.core.primitives import Int, Long, Int128, Int256, Bool, Bytes, String, Double, Vector
from pyrogram.raw.core import TLObject
from pyrogram import raw
from typing import List, Optional, Any

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class RequestEncryption(TLObject):  # type: ignore
    """Sends a request to start a secret chat to the user.

    .. include:: /_includes/usable-by/users.rst

    Details:
        - Layer: ``229``
        - ID: ``F64DAF43``

    Parameters:
        user_id (:obj:`InputUser <pyrogram.raw.base.InputUser>`):
            User ID

        random_id (``int`` ``32-bit``):
            Unique client request ID required to prevent resending. This also doubles as the chat ID. See `here » <https://core.telegram.org/api/updates#updatemessageid-updates>`_ for more info on random ID deduplication and updateMessageID mapping.

        g_a (``bytes``):
            ``A = g ^ a mod p``, see `Wikipedia <https://en.wikipedia.org/wiki/Diffie%E2%80%93Hellman_key_exchange>`_

    Returns:
        :obj:`EncryptedChat <pyrogram.raw.base.EncryptedChat>`
    """

    __slots__: List[str] = ["user_id", "random_id", "g_a"]

    ID = 0xf64daf43
    QUALNAME = "functions.messages.RequestEncryption"

    def __init__(self, *, user_id: "raw.base.InputUser", random_id: int, g_a: bytes) -> None:
        self.user_id = user_id  # InputUser
        self.random_id = random_id  # int
        self.g_a = g_a  # bytes

    @staticmethod
    def read(b: BytesIO, *args: Any) -> "RequestEncryption":
        # No flags
        
        user_id = TLObject.read(b)
        
        random_id = Int.read(b)
        
        g_a = Bytes.read(b)
        
        return RequestEncryption(user_id=user_id, random_id=random_id, g_a=g_a)

    def write(self, *args) -> bytes:
        b = BytesIO()
        b.write(Int(self.ID, False))

        # No flags
        
        b.write(self.user_id.write())
        
        b.write(Int(self.random_id))
        
        b.write(Bytes(self.g_a))
        
        return b.getvalue()