miniproto.mtproto.codec.decode_encrypted_message

miniproto.mtproto.codec.decode_encrypted_message

decode_encrypted_message(auth_key: bytes, packet: ByteBuffer, *, client_to_server: bool = False) -> DecodedEncryptedMessage

Authenticate, decrypt, and parse one MTProto encrypted envelope.

Parameters:

• auth_key (bytes) – 256-byte MTProto authorization key.
• packet (ByteBuffer) – Complete encrypted packet bytes.
• client_to_server (bool) – Direction used for message-key derivation; defaults to server-to-client.

Returns:

• DecodedEncryptedMessage – Decrypted envelope fields with body and padding views.

Raises:

• ValueError – If the native codec rejects framing, key, or integrity data.