def decode(self, envelope, session, aes_cipher=None, **kwargs):
		""" :meth:`.WMessengerOnionCoderLayerProto.decode` method implementation.

		:param envelope: original envelope
		:param session: original session
		:param aes_cipher: cipher to use
		:param kwargs: additional arguments

		:return: WMessengerBytesEnvelope
		"""
		return WMessengerBytesEnvelope(aes_cipher.decrypt(envelope.message(), decode=False), meta=envelope)