```\n// USDOFlashloanHelper.sol\nfunction flashLoan(IERC3156FlashBorrower receiver, address token, uint256 amount, bytes calldata data)\n        external\n        override\n        returns (bool)\n    {\n   \n        // rest of code\n\n        IERC20(address(usdo)).safeTransferFrom(address(receiver), address(usdo), fee);\n \n        _flashloanEntered = false;\n\n        return true;\n    }\n```\n