{
    "Function": "slitherConstructorConstantVariables",
    "File": "src/VirtualToken.sol",
    "Parent Contracts": [
        "lib/openzeppelin-contracts/contracts/access/Ownable.sol",
        "lib/openzeppelin-contracts/contracts/token/ERC20/ERC20.sol",
        "lib/openzeppelin-contracts/contracts/interfaces/draft-IERC6093.sol",
        "lib/openzeppelin-contracts/contracts/token/ERC20/extensions/IERC20Metadata.sol",
        "lib/openzeppelin-contracts/contracts/token/ERC20/IERC20.sol",
        "lib/openzeppelin-contracts/contracts/utils/Context.sol"
    ],
    "High-Level Calls": [],
    "Internal Calls": [],
    "Library Calls": [],
    "Low-Level Calls": [],
    "Code": "contract VirtualToken is ERC20, Ownable {\n    using SafeERC20 for IERC20;\n\n    uint256 public lastLoanBlock;\n    uint256 public loanedAmountThisBlock;\n\n    // immutable and constant\n    address public immutable underlyingToken;\n    uint256 public constant MAX_LOAN_PER_BLOCK = 300 ether;\n\n    mapping(address => uint256) public _debt;\n    mapping(address => bool) public whiteList;\n    mapping(address => bool) public validFactories;\n\n    event LoanTaken(address user, uint256 amount);\n    event LoanRepaid(address user, uint256 amount);\n    event CashIn(address user, uint256 amount);\n    event CashOut(address user, uint256 amount);\n    event FactoryUpdated(address newFactory);\n    event WhiteListAdded(address user);\n    event WhiteListRemoved(address user);\n\n    error DebtOverflow(address user, uint256 debt, uint256 value);\n\n    modifier onlyWhiteListed() {\n        require(whiteList[msg.sender], \"Only WhiteList\");\n        _;\n    }\n\n    modifier onlyValidFactory() {\n        require(validFactories[msg.sender], \"Only valid factory can call this function\");\n        _;\n    }\n\n    constructor(\n        string memory name,\n        string memory symbol,\n        address _underlyingToken\n    ) ERC20(name, symbol) Ownable(msg.sender) {\n        require(_underlyingToken != address(0), \"Invalid underlying token address\");\n        underlyingToken = _underlyingToken;\n    }\n\n    function isValidFactory(address _factory) external view returns (bool) {\n        return validFactories[_factory];\n    }\n\n    function updateFactory(address _factory, bool isValid) external onlyOwner {\n        validFactories[_factory] = isValid;\n        emit FactoryUpdated(_factory);\n    }\n\n    function addToWhiteList(address user) external onlyOwner {\n        whiteList[user] = true;\n        emit WhiteListAdded(user);\n    }\n\n    function removeFromWhiteList(address user) external onlyOwner {\n        whiteList[user] = false;\n        emit WhiteListRemoved(user);\n    }\n\n    function cashIn(uint256 amount) external payable onlyWhiteListed {\n        if (underlyingToken == LaunchPadUtils.NATIVE_TOKEN) {\n            require(msg.value == amount, \"Invalid ETH amount\");\n        } else {\n            _transferAssetFromUser(amount);\n        }\n        _mint(msg.sender, msg.value);\n        emit CashIn(msg.sender, msg.value);\n    }\n\n    function cashOut(uint256 amount) external onlyWhiteListed {\n        _burn(msg.sender, amount);\n        _transferAssetToUser(amount);\n        emit CashOut(msg.sender, amount);\n    }\n\n    function takeLoan(address to, uint256 amount) external payable onlyValidFactory {\n        if (block.number > lastLoanBlock) {\n            lastLoanBlock = block.number;\n            loanedAmountThisBlock = 0;\n        }\n        require(loanedAmountThisBlock + amount <= MAX_LOAN_PER_BLOCK, \"Loan limit per block exceeded\");\n\n        loanedAmountThisBlock += amount;\n        _mint(to, amount);\n        _increaseDebt(to, amount);\n\n        emit LoanTaken(to, amount);\n    }\n\n    /**\n     * @notice This function is currently unused.\n     */\n    function repayLoan(address to, uint256 amount) external onlyValidFactory {\n        _decreaseDebt(to, amount);\n        _burn(to, amount);\n        emit LoanRepaid(to, amount);\n    }\n\n    function getLoanDebt(address user) external view returns (uint256) {\n        return _debt[user];\n    }\n\n    function _increaseDebt(address user, uint256 amount) internal {\n        _debt[user] += amount;\n    }\n\n    function _decreaseDebt(address user, uint256 amount) internal {\n        require(_debt[user] >= amount, \"Decrease amount exceeds current debt\");\n        _debt[user] -= amount;\n    }\n\n    function _transferAssetFromUser(uint256 amount) internal {\n        if (underlyingToken == LaunchPadUtils.NATIVE_TOKEN) {\n            require(msg.value >= amount, \"Invalid ETH amount\");\n        } else {\n            IERC20(underlyingToken).safeTransferFrom(msg.sender, address(this), amount);\n        }\n    }\n\n    function _transferAssetToUser(uint256 amount) internal {\n        if (underlyingToken == LaunchPadUtils.NATIVE_TOKEN) {\n            require(address(this).balance >= amount, \"Insufficient ETH balance\");\n            (bool success, ) = msg.sender.call{value: amount}(\"\");\n            require(success, \"Transfer failed\");\n        } else {\n            IERC20(underlyingToken).safeTransfer(msg.sender, amount);\n        }\n    }\n\n    // override the _update function to prevent overflow\n    function _update(address from, address to, uint256 value) internal override {\n        // check: balance - _debt < value\n        if (from != address(0) && balanceOf(from) < value + _debt[from]) {\n            revert DebtOverflow(from, _debt[from], value);\n        }\n\n        super._update(from, to, value);\n    }\n}"
}