Lends

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/ERC20.sol)

pragma solidity ^0.8.0;

import "./IERC20.sol";
import "./extensions/IERC20Metadata.sol";
import "../../utils/Context.sol";

/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20PresetMinterPauser}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * The default value of {decimals} is 18. To change this, you should override
 * this function so it returns a different value.
 *
 * We have followed general OpenZeppelin Contracts guidelines: functions revert
 * instead returning `false` on failure. This behavior is nonetheless
 * conventional and does not conflict with the expectations of ERC20
 * applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
contract ERC20 is Context, IERC20, IERC20Metadata {
    mapping(address => uint256) private _balances;

    mapping(address => mapping(address => uint256)) private _allowances;

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

    /**
     * @dev Sets the values for {name} and {symbol}.
     *
     * All two of these values are immutable: they can only be set once during
     * construction.
     */
    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5.05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the default value returned by this function, unless
     * it's overridden.
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view virtual override returns (uint8) {
        return 18;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view virtual override returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address to, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _transfer(owner, to, amount);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on
     * `transferFrom`. This is semantically equivalent to an infinite approval.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * NOTE: Does not update the allowance if the current allowance
     * is the maximum `uint256`.
     *
     * Requirements:
     *
     * - `from` and `to` cannot be the zero address.
     * - `from` must have a balance of at least `amount`.
     * - the caller must have allowance for ``from``'s tokens of at least
     * `amount`.
     */
    function transferFrom(address from, address to, uint256 amount) public virtual override returns (bool) {
        address spender = _msgSender();
        _spendAllowance(from, spender, amount);
        _transfer(from, to, amount);
        return true;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, allowance(owner, spender) + addedValue);
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        address owner = _msgSender();
        uint256 currentAllowance = allowance(owner, spender);
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        unchecked {
            _approve(owner, spender, currentAllowance - subtractedValue);
        }

        return true;
    }

    /**
     * @dev Moves `amount` of tokens from `from` to `to`.
     *
     * This internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `from` must have a balance of at least `amount`.
     */
    function _transfer(address from, address to, uint256 amount) internal virtual {
        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(from, to, amount);

        uint256 fromBalance = _balances[from];
        require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
        unchecked {
            _balances[from] = fromBalance - amount;
            // Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by
            // decrementing then incrementing.
            _balances[to] += amount;
        }

        emit Transfer(from, to, amount);

        _afterTokenTransfer(from, to, amount);
    }

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _beforeTokenTransfer(address(0), account, amount);

        _totalSupply += amount;
        unchecked {
            // Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above.
            _balances[account] += amount;
        }
        emit Transfer(address(0), account, amount);

        _afterTokenTransfer(address(0), account, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        uint256 accountBalance = _balances[account];
        require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
        unchecked {
            _balances[account] = accountBalance - amount;
            // Overflow not possible: amount <= accountBalance <= totalSupply.
            _totalSupply -= amount;
        }

        emit Transfer(account, address(0), amount);

        _afterTokenTransfer(account, address(0), amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(address owner, address spender, uint256 amount) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    /**
     * @dev Updates `owner` s allowance for `spender` based on spent `amount`.
     *
     * Does not update the allowance amount in case of infinite allowance.
     * Revert if not enough allowance is available.
     *
     * Might emit an {Approval} event.
     */
    function _spendAllowance(address owner, address spender, uint256 amount) internal virtual {
        uint256 currentAllowance = allowance(owner, spender);
        if (currentAllowance != type(uint256).max) {
            require(currentAllowance >= amount, "ERC20: insufficient allowance");
            unchecked {
                _approve(owner, spender, currentAllowance - amount);
            }
        }
    }

    /**
     * @dev Hook that is called before any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * will be transferred to `to`.
     * - when `from` is zero, `amount` tokens will be minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual {}

    /**
     * @dev Hook that is called after any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * has been transferred to `to`.
     * - when `from` is zero, `amount` tokens have been minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens have been burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _afterTokenTransfer(address from, address to, uint256 amount) internal virtual {}
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `from` to `to` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 amount) external returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";

/**
 * @dev Interface for the optional metadata functions from the ERC20 standard.
 *
 * _Available since v4.1._
 */
interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the symbol of the token.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}

// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.7.5;
pragma abicoder v2;

import '@uniswap/v3-core/contracts/interfaces/callback/IUniswapV3SwapCallback.sol';

/// @title Router token swapping functionality
/// @notice Functions for swapping tokens via Uniswap V3
interface ISwapRouter is IUniswapV3SwapCallback {
    struct ExactInputSingleParams {
        address tokenIn;
        address tokenOut;
        uint24 fee;
        address recipient;
        uint256 deadline;
        uint256 amountIn;
        uint256 amountOutMinimum;
        uint160 sqrtPriceLimitX96;
    }

    /// @notice Swaps `amountIn` of one token for as much as possible of another token
    /// @param params The parameters necessary for the swap, encoded as `ExactInputSingleParams` in calldata
    /// @return amountOut The amount of the received token
    function exactInputSingle(ExactInputSingleParams calldata params) external payable returns (uint256 amountOut);

    struct ExactInputParams {
        bytes path;
        address recipient;
        uint256 deadline;
        uint256 amountIn;
        uint256 amountOutMinimum;
    }

    /// @notice Swaps `amountIn` of one token for as much as possible of another along the specified path
    /// @param params The parameters necessary for the multi-hop swap, encoded as `ExactInputParams` in calldata
    /// @return amountOut The amount of the received token
    function exactInput(ExactInputParams calldata params) external payable returns (uint256 amountOut);

    struct ExactOutputSingleParams {
        address tokenIn;
        address tokenOut;
        uint24 fee;
        address recipient;
        uint256 deadline;
        uint256 amountOut;
        uint256 amountInMaximum;
        uint160 sqrtPriceLimitX96;
    }

    /// @notice Swaps as little as possible of one token for `amountOut` of another token
    /// @param params The parameters necessary for the swap, encoded as `ExactOutputSingleParams` in calldata
    /// @return amountIn The amount of the input token
    function exactOutputSingle(ExactOutputSingleParams calldata params) external payable returns (uint256 amountIn);

    struct ExactOutputParams {
        bytes path;
        address recipient;
        uint256 deadline;
        uint256 amountOut;
        uint256 amountInMaximum;
    }

    /// @notice Swaps as little as possible of one token for `amountOut` of another along the specified path (reversed)
    /// @param params The parameters necessary for the multi-hop swap, encoded as `ExactOutputParams` in calldata
    /// @return amountIn The amount of the input token
    function exactOutput(ExactOutputParams calldata params) external payable returns (uint256 amountIn);
}

// SPDX-License-Identifier: MIT

pragma solidity 0.8.21;
pragma experimental ABIEncoderV2;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";

/// @title IToken Interface
/// @dev Interface for the Token contract
interface IToken is IERC20 {
    /// @dev Emitted when the contract is launched
    event Launch(uint256 blockNumber, uint256 timestamp);
    /// @dev Emitted when preparing for migration
    event PrepareForMigration(uint256 blockNumber, uint256 timestamp);
    /// @dev Emitted when swap status is updated
    event SetSwapEnabled(bool status);
    /// @dev Emitted when taxes status is updated
    event SetTaxesEnabled(bool status);
    /// @dev Emitted when swap tokens at amount is updated
    event SetSwapBackTreshold(uint256 oldValue, uint256 newValue);
    /// @dev Emitted when buy taxes are updated
    event SetBuyTaxes(uint256 oldValue, uint256 newValue);
    /// @dev Emitted when sell taxes are updated
    event SetSellTaxes(uint256 oldValue, uint256 newValue);
    /// @dev Emitted when the tax wallet is updated
    event SetTaxWallet(address indexed oldWallet, address indexed newWallet);
    /// @dev Emitted when withdrawing stuck tokens
    event WithdrawStuckTokens(address token, uint256 amount);
    /// @dev Emitted when an account is excluded from taxes
    event ExcludeFromTaxes(address indexed account, bool isExcluded);
    /// @dev Emitted when an AMM pair is set
    event SetAMMPair(address indexed pair, bool indexed value);

    /// @dev Function to launch the contract
    function launch() external;

    /// @dev Function to prepare for migration
    function prepareForMigration() external;

    /// @dev Function to burn a specified amount of tokens
    /// @param amount The amount of tokens to burn
    function burn(uint256 amount) external;

    /// @dev Function to set buy taxes
    /// @param _tax The new buy tax value
    function setBuyTax(uint256 _tax) external;

    /// @dev Function to set sell taxes
    /// @param _tax The new sell tax value
    function setSellTax(uint256 _tax) external;

    /// @dev Function to set the tax wallet address
    /// @param _taxWallet The new tax wallet address
    function setTaxWallet(address _taxWallet) external;

    /// @dev Function to set the swap status
    /// @param _value The new swap status value
    function setSwapEnabled(bool _value) external;

    /// @dev Function to set the taxes status
    /// @param _value The new taxes status value
    function setTaxesEnabled(bool _value) external;

    /// @dev Function to exclude or include multiple addresses from taxes
    /// @param _wallets Array of addresses to be excluded or included
    /// @param _value Boolean indicating whether to exclude or include
    function excludeFromTaxes(
        address[] calldata _wallets,
        bool _value
    ) external;

    /// @dev Function to check if an address is excluded from taxes
    /// @param _wallet The address to check
    /// @return _isExcluded Boolean indicating whether the address is excluded
    function isExcludedFromTaxes(address _wallet) external view returns (bool);
}

pragma solidity >=0.5.0;

interface IUniswapV2Factory {
    event PairCreated(address indexed token0, address indexed token1, address pair, uint);

    function feeTo() external view returns (address);
    function feeToSetter() external view returns (address);

    function getPair(address tokenA, address tokenB) external view returns (address pair);
    function allPairs(uint) external view returns (address pair);
    function allPairsLength() external view returns (uint);

    function createPair(address tokenA, address tokenB) external returns (address pair);

    function setFeeTo(address) external;
    function setFeeToSetter(address) external;
}

pragma solidity >=0.6.2;

interface IUniswapV2Router01 {
    function factory() external pure returns (address);
    function WETH() external pure returns (address);

    function addLiquidity(
        address tokenA,
        address tokenB,
        uint amountADesired,
        uint amountBDesired,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline
    ) external returns (uint amountA, uint amountB, uint liquidity);
    function addLiquidityETH(
        address token,
        uint amountTokenDesired,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external payable returns (uint amountToken, uint amountETH, uint liquidity);
    function removeLiquidity(
        address tokenA,
        address tokenB,
        uint liquidity,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline
    ) external returns (uint amountA, uint amountB);
    function removeLiquidityETH(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external returns (uint amountToken, uint amountETH);
    function removeLiquidityWithPermit(
        address tokenA,
        address tokenB,
        uint liquidity,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountA, uint amountB);
    function removeLiquidityETHWithPermit(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountToken, uint amountETH);
    function swapExactTokensForTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);
    function swapTokensForExactTokens(
        uint amountOut,
        uint amountInMax,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);
    function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
        external
        payable
        returns (uint[] memory amounts);
    function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
        external
        returns (uint[] memory amounts);
    function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
        external
        returns (uint[] memory amounts);
    function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
        external
        payable
        returns (uint[] memory amounts);

    function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
    function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
    function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
    function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
    function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}

pragma solidity >=0.6.2;

import './IUniswapV2Router01.sol';

interface IUniswapV2Router02 is IUniswapV2Router01 {
    function removeLiquidityETHSupportingFeeOnTransferTokens(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external returns (uint amountETH);
    function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountETH);

    function swapExactTokensForTokensSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
    function swapExactETHForTokensSupportingFeeOnTransferTokens(
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external payable;
    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
}

// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;

/// @title The interface for the Uniswap V3 Factory
/// @notice The Uniswap V3 Factory facilitates creation of Uniswap V3 pools and control over the protocol fees
interface IUniswapV3Factory {
    /// @notice Emitted when the owner of the factory is changed
    /// @param oldOwner The owner before the owner was changed
    /// @param newOwner The owner after the owner was changed
    event OwnerChanged(address indexed oldOwner, address indexed newOwner);

    /// @notice Emitted when a pool is created
    /// @param token0 The first token of the pool by address sort order
    /// @param token1 The second token of the pool by address sort order
    /// @param fee The fee collected upon every swap in the pool, denominated in hundredths of a bip
    /// @param tickSpacing The minimum number of ticks between initialized ticks
    /// @param pool The address of the created pool
    event PoolCreated(
        address indexed token0,
        address indexed token1,
        uint24 indexed fee,
        int24 tickSpacing,
        address pool
    );

    /// @notice Emitted when a new fee amount is enabled for pool creation via the factory
    /// @param fee The enabled fee, denominated in hundredths of a bip
    /// @param tickSpacing The minimum number of ticks between initialized ticks for pools created with the given fee
    event FeeAmountEnabled(uint24 indexed fee, int24 indexed tickSpacing);

    /// @notice Returns the current owner of the factory
    /// @dev Can be changed by the current owner via setOwner
    /// @return The address of the factory owner
    function owner() external view returns (address);

    /// @notice Returns the tick spacing for a given fee amount, if enabled, or 0 if not enabled
    /// @dev A fee amount can never be removed, so this value should be hard coded or cached in the calling context
    /// @param fee The enabled fee, denominated in hundredths of a bip. Returns 0 in case of unenabled fee
    /// @return The tick spacing
    function feeAmountTickSpacing(uint24 fee) external view returns (int24);

    /// @notice Returns the pool address for a given pair of tokens and a fee, or address 0 if it does not exist
    /// @dev tokenA and tokenB may be passed in either token0/token1 or token1/token0 order
    /// @param tokenA The contract address of either token0 or token1
    /// @param tokenB The contract address of the other token
    /// @param fee The fee collected upon every swap in the pool, denominated in hundredths of a bip
    /// @return pool The pool address
    function getPool(
        address tokenA,
        address tokenB,
        uint24 fee
    ) external view returns (address pool);

    /// @notice Creates a pool for the given two tokens and fee
    /// @param tokenA One of the two tokens in the desired pool
    /// @param tokenB The other of the two tokens in the desired pool
    /// @param fee The desired fee for the pool
    /// @dev tokenA and tokenB may be passed in either order: token0/token1 or token1/token0. tickSpacing is retrieved
    /// from the fee. The call will revert if the pool already exists, the fee is invalid, or the token arguments
    /// are invalid.
    /// @return pool The address of the newly created pool
    function createPool(
        address tokenA,
        address tokenB,
        uint24 fee
    ) external returns (address pool);

    /// @notice Updates the owner of the factory
    /// @dev Must be called by the current owner
    /// @param _owner The new owner of the factory
    function setOwner(address _owner) external;

    /// @notice Enables a fee amount with the given tickSpacing
    /// @dev Fee amounts may never be removed once enabled
    /// @param fee The fee amount to enable, denominated in hundredths of a bip (i.e. 1e-6)
    /// @param tickSpacing The spacing between ticks to be enforced for all pools created with the given fee amount
    function enableFeeAmount(uint24 fee, int24 tickSpacing) external;
}

// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;

/// @title Callback for IUniswapV3PoolActions#swap
/// @notice Any contract that calls IUniswapV3PoolActions#swap must implement this interface
interface IUniswapV3SwapCallback {
    /// @notice Called to `msg.sender` after executing a swap via IUniswapV3Pool#swap.
    /// @dev In the implementation you must pay the pool tokens owed for the swap.
    /// The caller of this method must be checked to be a UniswapV3Pool deployed by the canonical UniswapV3Factory.
    /// amount0Delta and amount1Delta can both be 0 if no tokens were swapped.
    /// @param amount0Delta The amount of token0 that was sent (negative) or must be received (positive) by the pool by
    /// the end of the swap. If positive, the callback must send that amount of token0 to the pool.
    /// @param amount1Delta The amount of token1 that was sent (negative) or must be received (positive) by the pool by
    /// the end of the swap. If positive, the callback must send that amount of token1 to the pool.
    /// @param data Any data passed through by the caller via the IUniswapV3PoolActions#swap call
    function uniswapV3SwapCallback(
        int256 amount0Delta,
        int256 amount1Delta,
        bytes calldata data
    ) external;
}

// SPDX-License-Identifier: MIT

pragma solidity 0.8.21;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@uniswap/v3-core/contracts/interfaces/IUniswapV3Factory.sol";
import "@uniswap/v3-periphery/contracts/interfaces/ISwapRouter.sol";
import "@uniswap/v2-core/contracts/interfaces/IUniswapV2Factory.sol";
import "@uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router02.sol";
import "./interface/IToken.sol";

interface IUniswapV3Router is ISwapRouter {
    function factory() external pure returns (address);
}

contract LendsToken is ERC20, Ownable, IToken {
    using SafeMath for uint256;

    /* ///////////////////////////////////////////////////////////
                            CONSTANTS
    //////////////////////////////////////////////////////////////
    */
    address public constant ZERO_ADDRESS = address(0);
    address public constant DEAD_ADDRESS = address(0xdead);

    /* ///////////////////////////////////////////////////////////
                            STATE VARIABLES
    //////////////////////////////////////////////////////////////
    */
    IUniswapV2Router02 public immutable uniswapV2Router;
    IUniswapV3Router public immutable uniswapV3Router;
    address public immutable uniswapUniversalRouter;

    address public uniswapV2Pair;
    address public uniswapV3Pair;

    address public taxWallet;

    bool private _swapping;
    bool private _v3LPProtectionEnabled;

    bool public swapEnabled;
    bool public taxesEnabled;
    bool public launched;

    uint256 public launchBlock;
    uint256 public launchTime;

    uint256 public buyTax;
    uint256 public sellTax;

    uint256 public swapBackTreshold;

    mapping(address => bool) private _isExcludedFromTaxes;
    mapping(address => bool) private _ammPairs;

    /* ///////////////////////////////////////////////////////////
                            MODIFIERS
    //////////////////////////////////////////////////////////////
    */
    modifier lockSwapping() {
        _swapping = true;
        _;
        _swapping = false;
    }

    /* ///////////////////////////////////////////////////////////
                            CONSTRUCTOR
    //////////////////////////////////////////////////////////////
    */
    constructor() ERC20("Lends", "LENDS") {
        uint256 totalSupply = 625_000_000 ether;

        uniswapV2Router = IUniswapV2Router02(
            0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
        );
        uniswapV3Router = IUniswapV3Router(
            0xE592427A0AEce92De3Edee1F18E0157C05861564
        );
        uniswapUniversalRouter = 0x3fC91A3afd70395Cd496C647d5a6CC9D4B2b7FAD;

        _approve(address(this), address(uniswapV2Router), type(uint256).max);

        buyTax = 10;
        sellTax = 10;
        swapBackTreshold = 1000 ether;

        taxWallet = owner();

        _v3LPProtectionEnabled = true;

        _excludeFromTaxes(address(this), true);
        _excludeFromTaxes(DEAD_ADDRESS, true);
        _excludeFromTaxes(taxWallet, true);

        _mint(0x93eeDD7bD39AE01Ca70DBE1c83Becb4edb183F19, totalSupply.mul(672).div(10000));
        _mint(0xd3E3fea8aB5b15D7518Aae04E4011b5eCd9fc102, totalSupply.mul(672).div(10000));
        _mint(0x29D82FE41C0bED5EC6194bD2a1c0e7E10f99e08A, totalSupply.mul(672).div(10000));
        _mint(0x3d48F3c2428E203C49127059A1FA1F0ce176910c, totalSupply.mul(672).div(10000));
        _mint(0x7e88F13F8B83e8574109675e02e59c9A9937f377, totalSupply.mul(672).div(10000));
        _mint(0x0919f02BE673B261A0bb496C9d546B76EF86A8Da, totalSupply.mul(672).div(10000));
        _mint(0x6d6e242e51F5285332fCD25F7F367E44AF9BAa23, totalSupply.mul(672).div(10000));
        _mint(0x3fbC174Eb1Dbc409CA2C3645BA6495C64102d42c, totalSupply.mul(672).div(10000));
        _mint(0x5396037E85184aE7F05D5d2238132316be375997, totalSupply.mul(267).div(10000));
        _mint(0xd663a350E661bb17A7cF6A2062B0c72a6a073FfD, totalSupply.mul(267).div(10000));
        _mint(0x56D60F732949E4592c016C9271883d2779eF385F, totalSupply.mul(267).div(10000));
        _mint(0x26B39d684c0d50c8eFA9B8B1Cdf518E96fFbf339, totalSupply.mul(160).div(10000));
        _mint(0xf1112CE591A22e54199Ff9e0Ac3ed130a7Cac083, totalSupply.mul(863).div(10000));
        _mint(0xc93a8Ea37FE474C4e0885FE498382E79D48cecA3, totalSupply.mul(160).div(10000));
        _mint(0xD4482C319101f76BbFb84668385f5D008cA25c3d, totalSupply.mul(250).div(10000));
        _mint(0x4F746C1844B15D8B31B9156c08A67d6970149EC9, totalSupply.mul(250).div(10000));
        _mint(0x56a54c59Bb09715b51E692D50536c2751eFcF9F4, totalSupply.mul(10).div(10000));
        _mint(0x5Eb9e728DEf0b9aA7ADf14d58E920FDeA72fACe0, totalSupply.mul(142).div(10000));
        _mint(0x4D64CEB8B90Ab76F103663f2bDDa403E47106838, totalSupply.mul(142).div(10000));
        _mint(0x90cdbD2e17B25E346046689e493efd887400bfff, totalSupply.mul(142).div(10000));
        _mint(0x5882e509b64eA399F7F5aF603e918B11bF46dDC8, totalSupply.mul(142).div(10000));
        _mint(0x5D7040CFf7FB596405192c4d934821e789Af900A, totalSupply.mul(142).div(10000));
        _mint(0x6B24fc2B374e0D6D54c84E30b938de5d0241b091, totalSupply.mul(142).div(10000));
        _mint(0xd55f2253805999f28a6B2BA5860e8CA4eA41e5d6, totalSupply.mul(142).div(10000));
        _mint(0xf791f5B16e39903a9f9E1261E5D65C856B5068f2, totalSupply.mul(142).div(10000));
        _mint(0x9124b3E632761c9f9E2Cd320315633D9C1439EB7, totalSupply.mul(142).div(10000));
        _mint(0xA6D35D849Eb053B9F9e165Cc46c74eF3cb7781Ad, totalSupply.mul(142).div(10000));
        _mint(0x566E0D8dC3BCD83508b59a2D4A7Bf069d709420E, totalSupply.mul(142).div(10000));
        _mint(0x7bB8427897B2237C9d1FF9dDbe443A65a2D123DE, totalSupply.mul(142).div(10000));
        _mint(0x1b0853Ee67Ca33206B55BB30B8111E6519Ca6079, totalSupply.mul(142).div(10000));
        _mint(0x92B963e84c586993f624e489f0c0aa0820Ead859, totalSupply.mul(142).div(10000));
        _mint(0x1aaE81943aAd50527913070ABd86C3a64DE2D774, totalSupply.mul(142).div(10000));
    }

    /* ///////////////////////////////////////////////////////////
                            PUBLIC FUNCTIONS
    //////////////////////////////////////////////////////////////
    */
    function launch() public onlyOwner {
        require(!launched, "ERC20: Already launched.");

        uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).getPair(
            address(this),
            uniswapV2Router.WETH()
        );

        if (uniswapV2Pair == ZERO_ADDRESS) {
            uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory())
                .createPair(address(this), uniswapV2Router.WETH());
        }

        uniswapV3Pair = IUniswapV3Factory(uniswapV3Router.factory()).createPool(
                address(this),
                uniswapV2Router.WETH(),
                10000
            );

        _approve(address(this), address(uniswapV2Pair), type(uint256).max);
        _approve(address(this), address(uniswapV3Pair), type(uint256).max);

        IERC20(uniswapV2Pair).approve(
            address(uniswapV2Router),
            type(uint256).max
        );

        _setAMMPair(address(uniswapV2Pair), true);
        _setAMMPair(address(uniswapV3Pair), true);

        uniswapV2Router.addLiquidityETH{value: address(this).balance}(
            address(this),
            balanceOf(address(this)),
            0,
            0,
            owner(),
            block.timestamp
        );

        swapEnabled = true;
        taxesEnabled = true;
        launched = true;

        launchBlock = block.number;
        launchTime = block.timestamp;

        emit Launch(launchBlock, launchTime);
    }

    function prepareForMigration() public onlyOwner {
        swapEnabled = false;
        taxesEnabled = false;
        _v3LPProtectionEnabled = false;

        buyTax = 0;
        sellTax = 0;

        swapBackTreshold = totalSupply();

        if (balanceOf(address(this)) > 0) {
            super._transfer(
                address(this),
                msg.sender,
                balanceOf(address(this))
            );
        }

        emit PrepareForMigration(block.number, block.timestamp);
    }

    function burn(uint256 amount) public {
        _burn(msg.sender, amount);
    }

    function withdrawStuckTokens(address _token) public onlyOwner {
        uint256 amount;
        if (_token == ZERO_ADDRESS) {
            bool success;
            amount = address(this).balance;
            (success, ) = address(msg.sender).call{value: amount}("");
        } else {
            require(IERC20(_token).balanceOf(address(this)) > 0, "No tokens");
            amount = IERC20(_token).balanceOf(address(this));
            IERC20(_token).transfer(msg.sender, amount);
        }
        emit WithdrawStuckTokens(_token, amount);
    }

    /* ///////////////////////////////////////////////////////////
                            SETTERS
    //////////////////////////////////////////////////////////////
    */
    function setBuyTax(uint256 _tax) public onlyOwner {
        require(_tax <= 20, "setBuyTax: Must keep tax at 20% or less");
        uint256 oldValue = buyTax;
        buyTax = _tax;
        emit SetBuyTaxes(oldValue, buyTax);
    }

    function setSellTax(uint256 _tax) public onlyOwner {
        require(_tax <= 20, "setSellTax: Must keep tax at 20% or less");
        uint256 oldValue = sellTax;
        sellTax = _tax;
        emit SetSellTaxes(oldValue, sellTax);
    }

    function setTaxWallet(address _taxWallet) public onlyOwner {
        require(_taxWallet != ZERO_ADDRESS, "ERC20: Address 0");
        address oldWallet = taxWallet;
        taxWallet = _taxWallet;
        _excludeFromTaxes(_taxWallet, true);
        emit SetTaxWallet(oldWallet, taxWallet);
    }

    function setSwapEnabled(bool _value) public onlyOwner {
        swapEnabled = _value;
        emit SetSwapEnabled(swapEnabled);
    }

    function setTaxesEnabled(bool _value) public onlyOwner {
        taxesEnabled = _value;
        emit SetTaxesEnabled(taxesEnabled);
    }

    function setSwapBackTreshold(uint256 _amount) public onlyOwner {
        uint256 oldValue = swapBackTreshold;
        swapBackTreshold = _amount;
        emit SetSwapBackTreshold(oldValue, swapBackTreshold);
    }

    function excludeFromTaxes(
        address[] calldata _wallets,
        bool _value
    ) public onlyOwner {
        for (uint256 i = 0; i < _wallets.length; i++) {
            _excludeFromTaxes(_wallets[i], _value);
        }
    }

    /* ///////////////////////////////////////////////////////////
                            GETTERS
    //////////////////////////////////////////////////////////////
    */
    function isExcludedFromTaxes(
        address _wallet
    ) public view returns (bool _isExcluded) {
        return _isExcludedFromTaxes[_wallet];
    }

    /* ///////////////////////////////////////////////////////////
                            INTERNAL FUNCTIONS
    //////////////////////////////////////////////////////////////
    */
    function _transfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual override {
        require(from != ZERO_ADDRESS, "ERC20: transfer from the zero address");
        require(to != ZERO_ADDRESS, "ERC20: transfer to the zero address");

        if (amount == 0) {
            super._transfer(from, to, 0);
            return;
        }

        if (
            _v3LPProtectionEnabled &&
            (from == uniswapV3Pair || to == uniswapV3Pair)
        ) {
            require(
                _isExcludedFromTaxes[from] || _isExcludedFromTaxes[to],
                "ERC20: Not authorized to add LP to Uniswap V3 Pool"
            );
        }

        if (
            from != owner() &&
            to != owner() &&
            to != ZERO_ADDRESS &&
            to != DEAD_ADDRESS &&
            !_swapping
        ) {
            if (!launched) {
                require(
                    _isExcludedFromTaxes[from] || _isExcludedFromTaxes[to],
                    "ERC20: Not launched."
                );
            }
        }

        if (swapEnabled) {
            uint256 balance = balanceOf(address(this));

            bool canSwap = balance >= swapBackTreshold;

            if (
                canSwap &&
                !_swapping &&
                !_ammPairs[from] &&
                !_isExcludedFromTaxes[from] &&
                !_isExcludedFromTaxes[to]
            ) {
                _swapBack(balance);
            }
        }

        if (taxesEnabled) {
            bool takeTax = !_swapping;

            if (_isExcludedFromTaxes[from] || _isExcludedFromTaxes[to]) {
                takeTax = false;
            }

            uint256 taxes = 0;
            uint256 totalTaxes = 0;

            if (takeTax) {
                if (_ammPairs[to] && sellTax > 0) {
                    if (block.number > launchBlock.add(1000)) {
                        totalTaxes = sellTax;
                    } else if (block.number > launchBlock.add(30)) {
                        totalTaxes = 20;
                    } else if (block.number > launchBlock.add(10)) {
                        totalTaxes = 33;
                    } else if (block.number > launchBlock.add(2)) {
                        totalTaxes = 40;
                    } else {
                        totalTaxes = 50;
                    }
                    taxes = amount.mul(totalTaxes).div(100);
                } else if (_ammPairs[from] && buyTax > 0) {
                    if (block.number > launchBlock.add(1000)) {
                        totalTaxes = buyTax;
                    } else if (block.number > launchBlock.add(30)) {
                        totalTaxes = 20;
                    } else if (block.number > launchBlock.add(10)) {
                        totalTaxes = 33;
                    } else if (block.number > launchBlock.add(2)) {
                        totalTaxes = 40;
                    } else {
                        totalTaxes = 50;
                    }
                    taxes = amount.mul(totalTaxes).div(100);
                }

                if (taxes > 0) {
                    super._transfer(from, address(this), taxes);
                }

                amount -= taxes;
            }
        }

        super._transfer(from, to, amount);
    }

    function _swapTokensForETH(uint256 _amount) internal virtual {
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = uniswapV2Router.WETH();

        _approve(address(this), address(uniswapV2Router), _amount);

        uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            _amount,
            0,
            path,
            address(this),
            block.timestamp
        );
    }

    function _swapBack(uint256 _amount) internal virtual lockSwapping {
        bool success;

        if (_amount == 0) return;

        _swapTokensForETH(_amount);

        (success, ) = address(taxWallet).call{value: address(this).balance}("");
    }

    function _excludeFromTaxes(address _wallet, bool _value) internal virtual {
        _isExcludedFromTaxes[_wallet] = _value;
        emit ExcludeFromTaxes(_wallet, _value);
    }

    function _setAMMPair(address _wallet, bool _value) internal virtual {
        _ammPairs[_wallet] = _value;
        emit SetAMMPair(_wallet, _value);
    }

    receive() external payable {}
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/math/SafeMath.sol)

pragma solidity ^0.8.0;

// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.

/**
 * @dev Wrappers over Solidity's arithmetic operations.
 *
 * NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler
 * now has built in overflow checking.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
            // benefit is lost if 'b' is also tested.
            // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        return a + b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return a - b;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        return a * b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}

{
  "compilationTarget": {
    "contracts/LendsToken.sol": "LendsToken"
  },
  "evmVersion": "paris",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "remappings": []
}