def _eth_to_token_swap_output(        self, output_token: AddressLike, qty: int, recipient: Optional[AddressLike]    ) -> HexBytes:        """Convert ETH to tokens given an output amount."""        if self.version == 1:            token_funcs = self.exchange_contract(output_token).functions            eth_qty = self.get_eth_token_output_price(output_token, qty)            tx_params = self._get_tx_params(eth_qty)            func_params: List[Any] = [qty, self._deadline()]            if not recipient:                function = token_funcs.ethToTokenSwapOutput(*func_params)            else:                func_params.append(recipient)                function = token_funcs.ethToTokenTransferOutput(*func_params)            return self._build_and_send_tx(function, tx_params)        else:            if recipient is None:                recipient = self.address            eth_qty = self.get_eth_token_output_price(output_token, qty) #<----------------------------            return self._build_and_send_tx(                self.router.functions.swapETHForExactTokens(                    qty,                    [self.get_weth_address(), output_token],                    recipient,                    self._deadline(),                ),                self._get_tx_params(eth_qty),            )

eth_qty = int(        (1 + self.max_slippage)*        self.get_eth_token_output_price(output_token, qty))