```\njusdOutside[msg.sender] -= repayJUSDAmount;\nuint256 index = getIndex();\nuint256 lockedEarnUSDCAmount = jusdOutside[msg.sender].decimalDiv(index);\nrequire(\n     earnUSDCBalance[msg.sender] >= lockedEarnUSDCAmount, "lockedEarnUSDCAmount is bigger than earnUSDCBalance"\n);\nwithdrawEarnUSDCAmount = earnUSDCBalance[msg.sender] - lockedEarnUSDCAmount;\n```\n