  function receiveTokenOrETH(
      address token,
      address sender,
      uint256 amount
    )
      external
      returns (bool)
    {
        if(token == address(0)) { revert TransferFailed(); }
        if(token != Denominations.ETH) { // ERC20
            IERC20(token).safeTransferFrom(sender, address(this), amount);
        } else { // ETH
            if(msg.value < amount) { revert TransferFailed(); }
        }
        return true;
    }
Running 4 tests for contracts/tests/LineOfCredit.t.sol:LineTest
[PASS] test_freeze_eth_addCredit() (gas: 277920)
[PASS] test_freeze_eth_depositAndClose() (gas: 280378)
[PASS] test_freeze_eth_depositAndRepay() (gas: 302991)
[PASS] test_freeze_eth_increaseCredit() (gas: 318830)
Test result: ok. 4 passed; 0 failed; finished in 1.59ms
    function _addCreditEth(address token, uint256 amount) internal {
        vm.prank(borrower);
        line.addCredit(dRate, fRate, amount, token, lender);
        vm.stopPrank();
        vm.prank(lender);
        line.addCredit{value: amount}(dRate, fRate, amount, token, lender);
        vm.stopPrank();
    }
    function test_freeze_eth_depositAndClose() public {
        uint256 amount = 1 ether;
        address eth = address(0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE);

        // fund lender
        deal(lender, amount*5);
        // fund borrower
        deal(borrower, amount*5);

        // add credit to line
        _addCreditEth(eth, amount);

        //borrow 1 ether
        bytes32 id = line.ids(0);
        vm.startPrank(borrower);
        line.borrow(id, amount);
        vm.stopPrank();
        
        //depositAndClose full extra funds (amount * 2)
        vm.startPrank(borrower);
        line.depositAndClose{value:amount*2}();
        vm.stopPrank();

        //validate funds are stuck
        console.log(address(line).balance);
        assert(address(line).balance == amount*2 - amount);
    }

     function test_freeze_eth_depositAndRepay() public {
        uint256 amount = 1 ether;
        address eth = address(0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE);

        // fund lender
        deal(lender, amount*5);
        // fund borrower
        deal(borrower, amount*5);

        // add credit to line
        _addCreditEth(eth, amount);

        //borrow 1 ether
        bytes32 id = line.ids(0);
        vm.startPrank(borrower);
        line.borrow(id, amount);
        vm.stopPrank();
        
        //depositAndRepay full extra funds (amount * 2)
        vm.startPrank(borrower);
        line.depositAndRepay{value:amount*2}(amount);
        vm.stopPrank();


        // Lender calls withdraw 
        vm.startPrank(lender);
        line.withdraw(id, amount);
        vm.stopPrank();

        //validate funds are stuck
        assert(address(line).balance == amount*2 - amount);
    }

    function test_freeze_eth_addCredit() public {
        uint256 amount = 1 ether;
        address eth = address(0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE);

        // fund lender
        deal(lender, amount*5);
        // fund borrower
        deal(borrower, amount*5);

        // add credit to line
        vm.prank(borrower);
        line.addCredit(dRate, fRate, amount, eth, lender);
        vm.stopPrank();
        vm.prank(lender);
        //double msg.value then amount
        line.addCredit{value: amount*2}(dRate, fRate, amount, eth, lender);
        vm.stopPrank();

        //borrow 1 ether
        bytes32 id = line.ids(0);
        vm.startPrank(borrower);
        line.borrow(id, amount);
        vm.stopPrank();
        
        //depositAndClose full extra funds (amount)
        vm.startPrank(borrower);
        line.depositAndClose{value:amount}();
        vm.stopPrank();

        //validate funds are stuck
        assert(address(line).balance == amount*2 - amount);
    }

    function test_freeze_eth_increaseCredit() public {
        uint256 amount = 1 ether;
        address eth = address(0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE);

        // fund lender
        deal(lender, amount*5);
        // fund borrower
        deal(borrower, amount*5);

        // add credit to line
        _addCreditEth(eth, amount);
        
        // get id
        bytes32 id = line.ids(0);

        // increase credit to line
        vm.prank(borrower);
        line.increaseCredit(id, amount);
        vm.stopPrank();
        vm.prank(lender);
        //double msg.value then amount
        line.increaseCredit{value:amount*2}(id, amount);
        vm.stopPrank();

        //total amount * 3 in contract

        //borrow 2 ether
        vm.startPrank(borrower);
        line.borrow(id, amount * 2);
        vm.stopPrank();
        
        //depositAndClose full extra funds (amount)
        vm.startPrank(borrower);
        line.depositAndClose{value:amount*2}();
        vm.stopPrank();

        //validate funds are stuck
        assert(address(line).balance == amount*3 - amount*2);
    }
