逻辑安全方面的威胁不包括下列哪项?（逻辑安全包括）

//SPDX-License-Identifier: UNLICENSED/** *Submitted for verification at Etherscan.io on 2020-08-26*/
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol


pragma solidity ^0.6.12;
/** * @dev Interface of the ERC20 standard as defined in the EIP. */interface IERC20 {    /**     * @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 `recipient`.     *     * Returns a boolean value indicating whether the operation succeeded.     *     * Emits a {Transfer} event.     */    function transfer(address recipient, 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 `sender` to `recipient` 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 sender, address recipient, uint256 amount) external returns (bool);
    /**     * @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);}
library SafeMath {    /**     * @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) {        uint256 c = a + b;        require(c >= a, \\\"SafeMath: addition overflow\\\");
        return c;    }
    /**     * @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 sub(a, b, \\\"SafeMath: subtraction overflow\\\");    }
    /**     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on     * overflow (when the result is negative).     *     * Counterpart to Solidity\\\'s `-` operator.     *     * Requirements:     *     * - Subtraction cannot overflow.     */    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {        require(b <= a, errorMessage);        uint256 c = a - b;
        return c;    }
    /**     * @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) {        // 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 0;        }
        uint256 c = a * b;        require(c / a == b, \\\"SafeMath: multiplication overflow\\\");
        return c;    }
    /**     * @dev Returns the integer division of two unsigned integers. Reverts 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) internal pure returns (uint256) {        return div(a, b, \\\"SafeMath: division by zero\\\");    }
    /**     * @dev Returns the integer division of two unsigned integers. Reverts 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) {        require(b > 0, errorMessage);        uint256 c = a / b;        // assert(a == b * c + a % b); // There is no case in which this doesn\\\'t hold
        return c;    }
    /**     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),     * Reverts 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 mod(a, b, \\\"SafeMath: modulo by zero\\\");    }
    /**     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),     * Reverts with custom message 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, string memory errorMessage) internal pure returns (uint256) {        require(b != 0, errorMessage);        return a % b;    }}
library Address {    function isContract(address account) internal view returns (bool) {        // According to EIP-1052, 0x0 is the value returned for not-yet created accounts        // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned        // for accounts without code, i.e. `keccak256(\\\'\\\')`        bytes32 codehash;        bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;        // solhint-disable-next-line no-inline-assembly        assembly { codehash := extcodehash(account) }        return (codehash != accountHash && codehash != 0x0);    }
    function sendValue(address payable recipient, uint256 amount) internal {        require(address(this).balance >= amount, \\\"Address: insufficient balance\\\");
        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value        (bool success, ) = recipient.call{ value: amount }(\\\"\\\");        require(success, \\\"Address: unable to send value, recipient may have reverted\\\");    }
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {      return functionCall(target, data, \\\"Address: low-level call failed\\\");    }
    function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {        return _functionCallWithValue(target, data, 0, errorMessage);    }
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {        return functionCallWithValue(target, data, value, \\\"Address: low-level call with value failed\\\");    }
    function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {        require(address(this).balance >= value, \\\"Address: insufficient balance for call\\\");        return _functionCallWithValue(target, data, value, errorMessage);    }
    function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {        require(isContract(target), \\\"Address: call to non-contract\\\");
        // solhint-disable-next-line avoid-low-level-calls        (bool success, bytes memory returndata) = target.call{ value: weiValue }(data);        if (success) {            return returndata;        } else {            // Look for revert reason and bubble it up if present            if (returndata.length > 0) {                // The easiest way to bubble the revert reason is using memory via assembly
                // solhint-disable-next-line no-inline-assembly                assembly {                    let returndata_size := mload(returndata)                    revert(add(32, returndata), returndata_size)                }            } else {                revert(errorMessage);            }        }    }}
library SafeERC20 {    using SafeMath for uint256;    using Address for address;
    function safeTransfer(IERC20 token, address to, uint256 value) internal {        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));    }
    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));    }    function safeApprove(IERC20 token, address spender, uint256 value) internal {        require((value == 0) || (token.allowance(address(this), spender) == 0),            \\\"SafeERC20: approve from non-zero to non-zero allowance\\\"        );        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));    }
    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {        uint256 newAllowance = token.allowance(address(this), spender).add(value);        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));    }
    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {        uint256 newAllowance = token.allowance(address(this), spender).sub(value, \\\"SafeERC20: decreased allowance below zero\\\");        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));    }
    function _callOptionalReturn(IERC20 token, bytes memory data) private {        bytes memory returndata = address(token).functionCall(data, \\\"SafeERC20: low-level call failed\\\");        if (returndata.length > 0) { // Return data is optional            // solhint-disable-next-line max-line-length            require(abi.decode(returndata, (bool)), \\\"SafeERC20: ERC20 operation did not succeed\\\");        }    }}

library EnumerableSet {    struct Set {        // Storage of set values        bytes32[] _values;
        // Position of the value in the `values` array, plus 1 because index 0        // means a value is not in the set.        mapping (bytes32 => uint256) _indexes;    }
    function _add(Set storage set, bytes32 value) private returns (bool) {        if (!_contains(set, value)) {            set._values.push(value);            // The value is stored at length-1, but we add 1 to all indexes            // and use 0 as a sentinel value            set._indexes[value] = set._values.length;            return true;        } else {            return false;        }    }
    function _remove(Set storage set, bytes32 value) private returns (bool) {        // We read and store the value\\\'s index to prevent multiple reads from the same storage slot        uint256 valueIndex = set._indexes[value];
        if (valueIndex != 0) { // Equivalent to contains(set, value)            uint256 toDeleteIndex = valueIndex - 1;            uint256 lastIndex = set._values.length - 1;
            // When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs            // so rarely, we still do the swap anyway to avoid the gas cost of adding an \\\'if\\\' statement.
            bytes32 lastvalue = set._values[lastIndex];
            // Move the last value to the index where the value to delete is            set._values[toDeleteIndex] = lastvalue;            // Update the index for the moved value            set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based
            // Delete the slot where the moved value was stored            set._values.pop();
            // Delete the index for the deleted slot            delete set._indexes[value];
            return true;        } else {            return false;        }    }
    /**     * @dev Returns true if the value is in the set. O(1).     */    function _contains(Set storage set, bytes32 value) private view returns (bool) {        return set._indexes[value] != 0;    }
    /**     * @dev Returns the number of values on the set. O(1).     */    function _length(Set storage set) private view returns (uint256) {        return set._values.length;    }
   /**    * @dev Returns the value stored at position `index` in the set. O(1).    *    * Note that there are no guarantees on the ordering of values inside the    * array, and it may change when more values are added or removed.    *    * Requirements:    *    * - `index` must be strictly less than {length}.    */    function _at(Set storage set, uint256 index) private view returns (bytes32) {        require(set._values.length > index, \\\"EnumerableSet: index out of bounds\\\");        return set._values[index];    }
    // AddressSet
    struct AddressSet {        Set _inner;    }
    /**     * @dev Add a value to a set. O(1).     *     * Returns true if the value was added to the set, that is if it was not     * already present.     */    function add(AddressSet storage set, address value) internal returns (bool) {        return _add(set._inner, bytes32(uint256(value)));    }
    /**     * @dev Removes a value from a set. O(1).     *     * Returns true if the value was removed from the set, that is if it was     * present.     */    function remove(AddressSet storage set, address value) internal returns (bool) {        return _remove(set._inner, bytes32(uint256(value)));    }
    /**     * @dev Returns true if the value is in the set. O(1).     */    function contains(AddressSet storage set, address value) internal view returns (bool) {        return _contains(set._inner, bytes32(uint256(value)));    }
    /**     * @dev Returns the number of values in the set. O(1).     */    function length(AddressSet storage set) internal view returns (uint256) {        return _length(set._inner);    }
   /**    * @dev Returns the value stored at position `index` in the set. O(1).    *    * Note that there are no guarantees on the ordering of values inside the    * array, and it may change when more values are added or removed.    *    * Requirements:    *    * - `index` must be strictly less than {length}.    */    function at(AddressSet storage set, uint256 index) internal view returns (address) {        return address(uint256(_at(set._inner, index)));    }

    // UintSet
    struct UintSet {        Set _inner;    }
    /**     * @dev Add a value to a set. O(1).     *     * Returns true if the value was added to the set, that is if it was not     * already present.     */    function add(UintSet storage set, uint256 value) internal returns (bool) {        return _add(set._inner, bytes32(value));    }
    /**     * @dev Removes a value from a set. O(1).     *     * Returns true if the value was removed from the set, that is if it was     * present.     */    function remove(UintSet storage set, uint256 value) internal returns (bool) {        return _remove(set._inner, bytes32(value));    }
    /**     * @dev Returns true if the value is in the set. O(1).     */    function contains(UintSet storage set, uint256 value) internal view returns (bool) {        return _contains(set._inner, bytes32(value));    }
    /**     * @dev Returns the number of values on the set. O(1).     */    function length(UintSet storage set) internal view returns (uint256) {        return _length(set._inner);    }
   /**    * @dev Returns the value stored at position `index` in the set. O(1).    *    * Note that there are no guarantees on the ordering of values inside the    * array, and it may change when more values are added or removed.    *    * Requirements:    *    * - `index` must be strictly less than {length}.    */    function at(UintSet storage set, uint256 index) internal view returns (uint256) {        return uint256(_at(set._inner, index));    }}
// File: @openzeppelin/contracts/GSN/Context.sol
abstract contract Context {    function _msgSender() internal view virtual returns (address payable) {        return msg.sender;    }
    function _msgData() internal view virtual returns (bytes memory) {        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691        return msg.data;    }}
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 () internal {        address msgSender = _msgSender();        _owner = msgSender;        emit OwnershipTransferred(address(0), msgSender);    }
    /**     * @dev Returns the address of the current owner.     */    function owner() public view returns (address) {        return _owner;    }
    /**     * @dev Throws if called by any account other than the owner.     */    modifier onlyOwner() {        require(_owner == _msgSender(), \\\"Ownable: caller is not the owner\\\");        _;    }
    /**     * @dev Leaves the contract without owner. It will not be possible to call     * `onlyOwner` functions anymore. Can only be called by the current owner.     *     * NOTE: Renouncing ownership will leave the contract without an owner,     * thereby removing any functionality that is only available to the owner.     */    function renounceOwnership() public virtual onlyOwner {        emit OwnershipTransferred(_owner, address(0));        _owner = 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\\\");        emit OwnershipTransferred(_owner, newOwner);        _owner = newOwner;    }}
contract ERC20 is Context, IERC20 {    using SafeMath for uint256;    using Address for address;
    mapping (address => uint256) private _balances;
    mapping (address => mapping (address => uint256)) private _allowances;
    uint256 private _totalSupply;
    string private _name;    string private _symbol;    uint8 private _decimals;
    /**     * @dev Sets the values for {name} and {symbol}, initializes {decimals} with     * a default value of 18.     *     * To select a different value for {decimals}, use {_setupDecimals}.     *     * All three of these values are immutable: they can only be set once during     * construction.     */    constructor (string memory name, string memory symbol) public {        _name = name;        _symbol = symbol;        _decimals = 18;    }
    /**     * @dev Returns the name of the token.     */    function name() public view returns (string memory) {        return _name;    }
    /**     * @dev Returns the symbol of the token, usually a shorter version of the     * name.     */    function symbol() public view 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 value {ERC20} uses, unless {_setupDecimals} is     * called.     *     * 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 returns (uint8) {        return _decimals;    }
    /**     * @dev See {IERC20-totalSupply}.     */    function totalSupply() public view override returns (uint256) {        return _totalSupply;    }
    /**     * @dev See {IERC20-balanceOf}.     */    function balanceOf(address account) public view override returns (uint256) {        return _balances[account];    }
    /**     * @dev See {IERC20-transfer}.     *     * Requirements:     *     * - `recipient` cannot be the zero address.     * - the caller must have a balance of at least `amount`.     */    function transfer(address recipient, uint256 amount) public virtual override returns (bool) {        _transfer(_msgSender(), recipient, 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}.     *     * Requirements:     *     * - `spender` cannot be the zero address.     */    function approve(address spender, uint256 amount) public virtual override returns (bool) {        _approve(_msgSender(), 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};     *     * Requirements:     * - `sender` and `recipient` cannot be the zero address.     * - `sender` must have a balance of at least `amount`.     * - the caller must have allowance for ``sender``\\\'s tokens of at least     * `amount`.     */    function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {        _transfer(sender, recipient, amount);        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, \\\"ERC20: transfer amount exceeds allowance\\\"));        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) {        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(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) {        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, \\\"ERC20: decreased allowance below zero\\\"));        return true;    }
    /**     * @dev Moves tokens `amount` from `sender` to `recipient`.     *     * This is 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:     *     * - `sender` cannot be the zero address.     * - `recipient` cannot be the zero address.     * - `sender` must have a balance of at least `amount`.     */    function _transfer(address sender, address recipient, uint256 amount) internal virtual {        require(sender != address(0), \\\"ERC20: transfer from the zero address\\\");        require(recipient != address(0), \\\"ERC20: transfer to the zero address\\\");
        _beforeTokenTransfer(sender, recipient, amount);
        _balances[sender] = _balances[sender].sub(amount, \\\"ERC20: transfer amount exceeds balance\\\");        _balances[recipient] = _balances[recipient].add(amount);        emit Transfer(sender, recipient, amount);    }    function mint(address account, uint256 amount) public  {
        _mint(account,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     *     * - `to` 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 = _totalSupply.add(amount);        _balances[account] = _balances[account].add(amount);        emit Transfer(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);
        _balances[account] = _balances[account].sub(amount, \\\"ERC20: burn amount exceeds balance\\\");        _totalSupply = _totalSupply.sub(amount);        emit Transfer(account, address(0), amount);    }
    /**     * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.     *     * This is 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 Sets {decimals} to a value other than the default one of 18.     *     * WARNING: This function should only be called from the constructor. Most     * applications that interact with token contracts will not expect     * {decimals} to ever change, and may work incorrectly if it does.     */    function _setupDecimals(uint8 decimals_) internal {        _decimals = decimals_;    }
    /**     * @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 to 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 { }}


contract test{    using SafeMath for uint256;    using SafeERC20 for IERC20;    constructor() public {        address owner = msg.sender;    }
    function safeSendLp(address _lpToken,address _user,uint _amount) public {        uint lpBal = IERC20(_lpToken).balanceOf(address(this));        if(lpBal > _amount){            IERC20(_lpToken).safeTransfer(_user,_amount);        }else {            IERC20(_lpToken).safeTransfer(_user,lpBal);        }    }
}

    function mint(address account, uint256 amount) public  {
        _mint(account,amount);    }