{"Address.sol":{"content":"pragma solidity ^0.6.0;\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary Address {\n    /**\n     * @dev Returns true if `account` is a contract.\n     *\n     * [IMPORTANT]\n     * ====\n     * It is unsafe to assume that an address for which this function returns\n     * false is an externally-owned account (EOA) and not a contract.\n     *\n     * Among others, `isContract` will return false for the following\n     * types of addresses:\n     *\n     *  - an externally-owned account\n     *  - a contract in construction\n     *  - an address where a contract will be created\n     *  - an address where a contract lived, but was destroyed\n     * ====\n     */\n    function isContract(address account) internal view returns (bool) {\n        // According to EIP-1052, 0x0 is the value returned for not-yet created accounts\n        // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned\n        // for accounts without code, i.e. `keccak256(\u0027\u0027)`\n        bytes32 codehash;\n        bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;\n        // solhint-disable-next-line no-inline-assembly\n        assembly { codehash := extcodehash(account) }\n        return (codehash != accountHash \u0026\u0026 codehash != 0x0);\n    }\n\n    /**\n     * @dev Replacement for Solidity\u0027s `transfer`: sends `amount` wei to\n     * `recipient`, forwarding all available gas and reverting on errors.\n     *\n     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n     * of certain opcodes, possibly making contracts go over the 2300 gas limit\n     * imposed by `transfer`, making them unable to receive funds via\n     * `transfer`. {sendValue} removes this limitation.\n     *\n     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n     *\n     * IMPORTANT: because control is transferred to `recipient`, care must be\n     * taken to not create reentrancy vulnerabilities. Consider using\n     * {ReentrancyGuard} or the\n     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n     */\n    function sendValue(address payable recipient, uint256 amount) internal {\n        require(address(this).balance \u003e= amount, \"Address: insufficient balance\");\n\n        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value\n        (bool success, ) = recipient.call{ value: amount }(\"\");\n        require(success, \"Address: unable to send value, recipient may have reverted\");\n    }\n\n    /**\n     * @dev Performs a Solidity function call using a low level `call`. A\n     * plain`call` is an unsafe replacement for a function call: use this\n     * function instead.\n     *\n     * If `target` reverts with a revert reason, it is bubbled up by this\n     * function (like regular Solidity function calls).\n     *\n     * Returns the raw returned data. To convert to the expected return value,\n     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n     *\n     * Requirements:\n     *\n     * - `target` must be a contract.\n     * - calling `target` with `data` must not revert.\n     *\n     * _Available since v3.1._\n     */\n    function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n      return functionCall(target, data, \"Address: low-level call failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\n     * `errorMessage` as a fallback revert reason when `target` reverts.\n     *\n     * _Available since v3.1._\n     */\n    function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {\n        return _functionCallWithValue(target, data, 0, errorMessage);\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n     * but also transferring `value` wei to `target`.\n     *\n     * Requirements:\n     *\n     * - the calling contract must have an ETH balance of at least `value`.\n     * - the called Solidity function must be `payable`.\n     *\n     * _Available since v3.1._\n     */\n    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {\n        return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n     * with `errorMessage` as a fallback revert reason when `target` reverts.\n     *\n     * _Available since v3.1._\n     */\n    function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {\n        require(address(this).balance \u003e= value, \"Address: insufficient balance for call\");\n        return _functionCallWithValue(target, data, value, errorMessage);\n    }\n\n    function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {\n        require(isContract(target), \"Address: call to non-contract\");\n\n        // solhint-disable-next-line avoid-low-level-calls\n        (bool success, bytes memory returndata) = target.call{ value: weiValue }(data);\n        if (success) {\n            return returndata;\n        } else {\n            // Look for revert reason and bubble it up if present\n            if (returndata.length \u003e 0) {\n                // The easiest way to bubble the revert reason is using memory via assembly\n\n                // solhint-disable-next-line no-inline-assembly\n                assembly {\n                    let returndata_size := mload(returndata)\n                    revert(add(32, returndata), returndata_size)\n                }\n            } else {\n                revert(errorMessage);\n            }\n        }\n    }\n}"},"Context.sol":{"content":"pragma solidity ^0.6.0;\n\nabstract contract Context {\n    function _msgSender() internal view virtual returns (address payable) {\n        return msg.sender;\n    }\n\n    function _msgData() internal view virtual returns (bytes memory) {\n        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691\n        return msg.data;\n    }\n}\n"},"IERC20.sol":{"content":"pragma solidity ^0.6.0;\n\n/**\n * @dev Interface of the ERC20 standard as defined in the EIP.\n */\ninterface IERC20 {\n    /**\n     * @dev Returns the amount of tokens in existence.\n     */\n    function totalSupply() external view returns (uint256);\n\n    /**\n     * @dev Returns the amount of tokens owned by `account`.\n     */\n    function balanceOf(address account) external view returns (uint256);\n\n    /**\n     * @dev Moves `amount` tokens from the caller\u0027s account to `recipient`.\n     *\n     * Returns a boolean value indicating whether the operation succeeded.\n     *\n     * Emits a {Transfer} event.\n     */\n    function transfer(address recipient, uint256 amount) external returns (bool);\n\n    /**\n     * @dev Returns the remaining number of tokens that `spender` will be\n     * allowed to spend on behalf of `owner` through {transferFrom}. This is\n     * zero by default.\n     *\n     * This value changes when {approve} or {transferFrom} are called.\n     */\n    function allowance(address owner, address spender) external view returns (uint256);\n\n    /**\n     * @dev Sets `amount` as the allowance of `spender` over the caller\u0027s tokens.\n     *\n     * Returns a boolean value indicating whether the operation succeeded.\n     *\n     * IMPORTANT: Beware that changing an allowance with this method brings the risk\n     * that someone may use both the old and the new allowance by unfortunate\n     * transaction ordering. One possible solution to mitigate this race\n     * condition is to first reduce the spender\u0027s allowance to 0 and set the\n     * desired value afterwards:\n     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729\n     *\n     * Emits an {Approval} event.\n     */\n    function approve(address spender, uint256 amount) external returns (bool);\n\n    /**\n     * @dev Moves `amount` tokens from `sender` to `recipient` using the\n     * allowance mechanism. `amount` is then deducted from the caller\u0027s\n     * allowance.\n     *\n     * Returns a boolean value indicating whether the operation succeeded.\n     *\n     * Emits a {Transfer} event.\n     */\n    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);\n\n    /**\n     * @dev Emitted when `value` tokens are moved from one account (`from`) to\n     * another (`to`).\n     *\n     * Note that `value` may be zero.\n     */\n    event Transfer(address indexed from, address indexed to, uint256 value);\n\n    /**\n     * @dev Emitted when the allowance of a `spender` for an `owner` is set by\n     * a call to {approve}. `value` is the new allowance.\n     */\n    event Approval(address indexed owner, address indexed spender, uint256 value);\n}\n"},"Ownable.sol":{"content":"pragma solidity ^0.6.0;\n\nimport \"./Context.sol\";\n\ncontract Ownable is Context {\n    address private _owner;\n    address private _previousOwner;\n    uint256 private _lockTime;\n\n    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n    /**\n     * @dev Initializes the contract setting the deployer as the initial owner.\n     */\n    constructor () internal {\n        address msgSender = _msgSender();\n        _owner = msgSender;\n        emit OwnershipTransferred(address(0), msgSender);\n    }\n\n    /**\n     * @dev Returns the address of the current owner.\n     */\n    function owner() public view returns (address) {\n        return _owner;\n    }\n\n    /**\n     * @dev Throws if called by any account other than the owner.\n     */\n    modifier onlyOwner() {\n        require(_owner == _msgSender(), \"Ownable: caller is not the owner\");\n        _;\n    }\n\n     /**\n     * @dev Leaves the contract without owner. It will not be possible to call\n     * `onlyOwner` functions anymore. Can only be called by the current owner.\n     *\n     * NOTE: Renouncing ownership will leave the contract without an owner,\n     * thereby removing any functionality that is only available to the owner.\n     */\n    function renounceOwnership() public virtual onlyOwner {\n        emit OwnershipTransferred(_owner, address(0));\n        _owner = address(0);\n    }\n\n    /**\n     * @dev Transfers ownership of the contract to a new account (`newOwner`).\n     * Can only be called by the current owner.\n     */\n    function transferOwnership(address newOwner) public virtual onlyOwner {\n        require(newOwner != address(0), \"Ownable: new owner is the zero address\");\n        emit OwnershipTransferred(_owner, newOwner);\n        _owner = newOwner;\n    }\n\n    function geUnlockTime() public view returns (uint256) {\n        return _lockTime;\n    }\n\n    //Locks the contract for owner for the amount of time provided\n    function lock(uint256 time) public virtual onlyOwner {\n        _previousOwner = _owner;\n        _owner = address(0);\n        _lockTime = now + time;\n        emit OwnershipTransferred(_owner, address(0));\n    }\n    \n    //Unlocks the contract for owner when _lockTime is exceeds\n    function unlock() public virtual {\n        require(_previousOwner == msg.sender, \"You don\u0027t have permission to unlock\");\n        require(now \u003e _lockTime , \"Contract is locked until 7 days\");\n        emit OwnershipTransferred(_owner, _previousOwner);\n        _owner = _previousOwner;\n    }\n}"},"poodl.sol":{"content":"pragma solidity \u003e=0.6.2;\n\nimport \"./Context.sol\";\nimport \"./IERC20.sol\";\nimport \"./Ownable.sol\";\nimport \"./SafeMath.sol\";\nimport \"./Address.sol\";\n\n\ncontract POODL is Context, IERC20, Ownable {\n    using SafeMath for uint256;\n    using Address for address;\n\n    mapping (address =\u003e uint256) private _rOwned;\n    mapping (address =\u003e uint256) private _tOwned;\n    mapping (address =\u003e mapping (address =\u003e uint256)) private _allowances;\n\n    mapping (address =\u003e bool) private _isExcluded;\n    address[] private _excluded;\n   \n    uint256 private constant MAX = ~uint256(0);\n    uint256 private _tTotal = 100000000000000 * 10**9;\n    uint256 private _rTotal = (MAX - (MAX % _tTotal));\n    uint256 private _tFeeTotal;\n    uint256 private _tBurnTotal;\n\n    string private _name = \u0027POODLE\u0027;\n    string private _symbol = \u0027POODL\u0027;\n    uint8 private _decimals = 9;\n    \n    uint256 private _taxFee = 1;\n    uint256 private _burnFee = 1;\n    uint256 private _maxTxAmount = 100000000000000e9;\n\n    constructor () public {\n        _rOwned[_msgSender()] = _rTotal;\n        emit Transfer(address(0), _msgSender(), _tTotal);\n    }\n\n    function name() public view returns (string memory) {\n        return _name;\n    }\n\n    function symbol() public view returns (string memory) {\n        return _symbol;\n    }\n\n    function decimals() public view returns (uint8) {\n        return _decimals;\n    }\n\n    function totalSupply() public view override returns (uint256) {\n        return _tTotal;\n    }\n\n    function balanceOf(address account) public view override returns (uint256) {\n        if (_isExcluded[account]) return _tOwned[account];\n        return tokenFromReflection(_rOwned[account]);\n    }\n\n    function transfer(address recipient, uint256 amount) public override returns (bool) {\n        _transfer(_msgSender(), recipient, amount);\n        return true;\n    }\n\n    function allowance(address owner, address spender) public view override returns (uint256) {\n        return _allowances[owner][spender];\n    }\n\n    function approve(address spender, uint256 amount) public override returns (bool) {\n        _approve(_msgSender(), spender, amount);\n        return true;\n    }\n\n    function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {\n        _transfer(sender, recipient, amount);\n        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, \"ERC20: transfer amount exceeds allowance\"));\n        return true;\n    }\n\n    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {\n        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));\n        return true;\n    }\n\n    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {\n        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, \"ERC20: decreased allowance below zero\"));\n        return true;\n    }\n\n    function isExcluded(address account) public view returns (bool) {\n        return _isExcluded[account];\n    }\n\n    function totalFees() public view returns (uint256) {\n        return _tFeeTotal;\n    }\n    \n    function totalBurn() public view returns (uint256) {\n        return _tBurnTotal;\n    }\n\n    function deliver(uint256 tAmount) public {\n        address sender = _msgSender();\n        require(!_isExcluded[sender], \"Excluded addresses cannot call this function\");\n        (uint256 rAmount,,,,,) = _getValues(tAmount);\n        _rOwned[sender] = _rOwned[sender].sub(rAmount);\n        _rTotal = _rTotal.sub(rAmount);\n        _tFeeTotal = _tFeeTotal.add(tAmount);\n    }\n\n    function reflectionFromToken(uint256 tAmount, bool deductTransferFee) public view returns(uint256) {\n        require(tAmount \u003c= _tTotal, \"Amount must be less than supply\");\n        if (!deductTransferFee) {\n            (uint256 rAmount,,,,,) = _getValues(tAmount);\n            return rAmount;\n        } else {\n            (,uint256 rTransferAmount,,,,) = _getValues(tAmount);\n            return rTransferAmount;\n        }\n    }\n\n    function tokenFromReflection(uint256 rAmount) public view returns(uint256) {\n        require(rAmount \u003c= _rTotal, \"Amount must be less than total reflections\");\n        uint256 currentRate =  _getRate();\n        return rAmount.div(currentRate);\n    }\n\n    function excludeAccount(address account) external onlyOwner() {\n        require(account != 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D, \u0027We can not exclude Uniswap router.\u0027);\n        require(!_isExcluded[account], \"Account is already excluded\");\n        if(_rOwned[account] \u003e 0) {\n            _tOwned[account] = tokenFromReflection(_rOwned[account]);\n        }\n        _isExcluded[account] = true;\n        _excluded.push(account);\n    }\n\n    function includeAccount(address account) external onlyOwner() {\n        require(_isExcluded[account], \"Account is already excluded\");\n        for (uint256 i = 0; i \u003c _excluded.length; i++) {\n            if (_excluded[i] == account) {\n                _excluded[i] = _excluded[_excluded.length - 1];\n                _tOwned[account] = 0;\n                _isExcluded[account] = false;\n                _excluded.pop();\n                break;\n            }\n        }\n    }\n\n    function _approve(address owner, address spender, uint256 amount) private {\n        require(owner != address(0), \"ERC20: approve from the zero address\");\n        require(spender != address(0), \"ERC20: approve to the zero address\");\n\n        _allowances[owner][spender] = amount;\n        emit Approval(owner, spender, amount);\n    }\n\n    function _transfer(address sender, address recipient, uint256 amount) private {\n        require(sender != address(0), \"ERC20: transfer from the zero address\");\n        require(recipient != address(0), \"ERC20: transfer to the zero address\");\n        require(amount \u003e 0, \"Transfer amount must be greater than zero\");\n        \n        if(sender != owner() \u0026\u0026 recipient != owner())\n            require(amount \u003c= _maxTxAmount, \"Transfer amount exceeds the maxTxAmount.\");\n        \n        if (_isExcluded[sender] \u0026\u0026 !_isExcluded[recipient]) {\n            _transferFromExcluded(sender, recipient, amount);\n        } else if (!_isExcluded[sender] \u0026\u0026 _isExcluded[recipient]) {\n            _transferToExcluded(sender, recipient, amount);\n        } else if (!_isExcluded[sender] \u0026\u0026 !_isExcluded[recipient]) {\n            _transferStandard(sender, recipient, amount);\n        } else if (_isExcluded[sender] \u0026\u0026 _isExcluded[recipient]) {\n            _transferBothExcluded(sender, recipient, amount);\n        } else {\n            _transferStandard(sender, recipient, amount);\n        }\n    }\n\n    function _transferStandard(address sender, address recipient, uint256 tAmount) private {\n        uint256 currentRate =  _getRate();\n        (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tBurn) = _getValues(tAmount);\n        uint256 rBurn =  tBurn.mul(currentRate);\n        _rOwned[sender] = _rOwned[sender].sub(rAmount);\n        _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);       \n        _reflectFee(rFee, rBurn, tFee, tBurn);\n        emit Transfer(sender, recipient, tTransferAmount);\n    }\n\n    function _transferToExcluded(address sender, address recipient, uint256 tAmount) private {\n        uint256 currentRate =  _getRate();\n        (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tBurn) = _getValues(tAmount);\n        uint256 rBurn =  tBurn.mul(currentRate);\n        _rOwned[sender] = _rOwned[sender].sub(rAmount);\n        _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);\n        _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);           \n        _reflectFee(rFee, rBurn, tFee, tBurn);\n        emit Transfer(sender, recipient, tTransferAmount);\n    }\n\n    function _transferFromExcluded(address sender, address recipient, uint256 tAmount) private {\n        uint256 currentRate =  _getRate();\n        (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tBurn) = _getValues(tAmount);\n        uint256 rBurn =  tBurn.mul(currentRate);\n        _tOwned[sender] = _tOwned[sender].sub(tAmount);\n        _rOwned[sender] = _rOwned[sender].sub(rAmount);\n        _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);   \n        _reflectFee(rFee, rBurn, tFee, tBurn);\n        emit Transfer(sender, recipient, tTransferAmount);\n    }\n\n    function _transferBothExcluded(address sender, address recipient, uint256 tAmount) private {\n        uint256 currentRate =  _getRate();\n        (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tBurn) = _getValues(tAmount);\n        uint256 rBurn =  tBurn.mul(currentRate);\n        _tOwned[sender] = _tOwned[sender].sub(tAmount);\n        _rOwned[sender] = _rOwned[sender].sub(rAmount);\n        _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);\n        _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);        \n        _reflectFee(rFee, rBurn, tFee, tBurn);\n        emit Transfer(sender, recipient, tTransferAmount);\n    }\n\n    function _reflectFee(uint256 rFee, uint256 rBurn, uint256 tFee, uint256 tBurn) private {\n        _rTotal = _rTotal.sub(rFee).sub(rBurn);\n        _tFeeTotal = _tFeeTotal.add(tFee);\n        _tBurnTotal = _tBurnTotal.add(tBurn);\n        _tTotal = _tTotal.sub(tBurn);\n    }\n\n    function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) {\n        (uint256 tTransferAmount, uint256 tFee, uint256 tBurn) = _getTValues(tAmount, _taxFee, _burnFee);\n        uint256 currentRate =  _getRate();\n        (uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tBurn, currentRate);\n        return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tBurn);\n    }\n\n    function _getTValues(uint256 tAmount, uint256 taxFee, uint256 burnFee) private pure returns (uint256, uint256, uint256) {\n        uint256 tFee = tAmount.mul(taxFee).div(100);\n        uint256 tBurn = tAmount.mul(burnFee).div(100);\n        uint256 tTransferAmount = tAmount.sub(tFee).sub(tBurn);\n        return (tTransferAmount, tFee, tBurn);\n    }\n\n    function _getRValues(uint256 tAmount, uint256 tFee, uint256 tBurn, uint256 currentRate) private pure returns (uint256, uint256, uint256) {\n        uint256 rAmount = tAmount.mul(currentRate);\n        uint256 rFee = tFee.mul(currentRate);\n        uint256 rBurn = tBurn.mul(currentRate);\n        uint256 rTransferAmount = rAmount.sub(rFee).sub(rBurn);\n        return (rAmount, rTransferAmount, rFee);\n    }\n\n    function _getRate() private view returns(uint256) {\n        (uint256 rSupply, uint256 tSupply) = _getCurrentSupply();\n        return rSupply.div(tSupply);\n    }\n\n    function _getCurrentSupply() private view returns(uint256, uint256) {\n        uint256 rSupply = _rTotal;\n        uint256 tSupply = _tTotal;      \n        for (uint256 i = 0; i \u003c _excluded.length; i++) {\n            if (_rOwned[_excluded[i]] \u003e rSupply || _tOwned[_excluded[i]] \u003e tSupply) return (_rTotal, _tTotal);\n            rSupply = rSupply.sub(_rOwned[_excluded[i]]);\n            tSupply = tSupply.sub(_tOwned[_excluded[i]]);\n        }\n        if (rSupply \u003c _rTotal.div(_tTotal)) return (_rTotal, _tTotal);\n        return (rSupply, tSupply);\n    }\n    \n    function _getTaxFee() private view returns(uint256) {\n        return _taxFee;\n    }\n\n    function _getMaxTxAmount() private view returns(uint256) {\n        return _maxTxAmount;\n    }\n    \n    function _setTaxFee(uint256 taxFee) external onlyOwner() {\n        require(taxFee \u003e= 1 \u0026\u0026 taxFee \u003c= 10, \u0027taxFee should be in 1 - 10\u0027);\n        _taxFee = taxFee;\n    }\n    \n    function _setMaxTxAmount(uint256 maxTxAmount) external onlyOwner() {\n        require(maxTxAmount \u003e= 100000000000000e9 , \u0027maxTxAmount should be greater than 100000000000000e9\u0027);\n        _maxTxAmount = maxTxAmount;\n    }\n}"},"SafeMath.sol":{"content":"pragma solidity ^0.6.0;\n\n/**\n * @dev Wrappers over Solidity\u0027s arithmetic operations with added overflow\n * checks.\n *\n * Arithmetic operations in Solidity wrap on overflow. This can easily result\n * in bugs, because programmers usually assume that an overflow raises an\n * error, which is the standard behavior in high level programming languages.\n * `SafeMath` restores this intuition by reverting the transaction when an\n * operation overflows.\n *\n * Using this library instead of the unchecked operations eliminates an entire\n * class of bugs, so it\u0027s recommended to use it always.\n */\nlibrary SafeMath {\n    /**\n     * @dev Returns the addition of two unsigned integers, reverting on\n     * overflow.\n     *\n     * Counterpart to Solidity\u0027s `+` operator.\n     *\n     * Requirements:\n     *\n     * - Addition cannot overflow.\n     */\n    function add(uint256 a, uint256 b) internal pure returns (uint256) {\n        uint256 c = a + b;\n        require(c \u003e= a, \"SafeMath: addition overflow\");\n\n        return c;\n    }\n\n    /**\n     * @dev Returns the subtraction of two unsigned integers, reverting on\n     * overflow (when the result is negative).\n     *\n     * Counterpart to Solidity\u0027s `-` operator.\n     *\n     * Requirements:\n     *\n     * - Subtraction cannot overflow.\n     */\n    function sub(uint256 a, uint256 b) internal pure returns (uint256) {\n        return sub(a, b, \"SafeMath: subtraction overflow\");\n    }\n\n    /**\n     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on\n     * overflow (when the result is negative).\n     *\n     * Counterpart to Solidity\u0027s `-` operator.\n     *\n     * Requirements:\n     *\n     * - Subtraction cannot overflow.\n     */\n    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {\n        require(b \u003c= a, errorMessage);\n        uint256 c = a - b;\n\n        return c;\n    }\n\n    /**\n     * @dev Returns the multiplication of two unsigned integers, reverting on\n     * overflow.\n     *\n     * Counterpart to Solidity\u0027s `*` operator.\n     *\n     * Requirements:\n     *\n     * - Multiplication cannot overflow.\n     */\n    function mul(uint256 a, uint256 b) internal pure returns (uint256) {\n        // Gas optimization: this is cheaper than requiring \u0027a\u0027 not being zero, but the\n        // benefit is lost if \u0027b\u0027 is also tested.\n        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522\n        if (a == 0) {\n            return 0;\n        }\n\n        uint256 c = a * b;\n        require(c / a == b, \"SafeMath: multiplication overflow\");\n\n        return c;\n    }\n\n    /**\n     * @dev Returns the integer division of two unsigned integers. Reverts on\n     * division by zero. The result is rounded towards zero.\n     *\n     * Counterpart to Solidity\u0027s `/` operator. Note: this function uses a\n     * `revert` opcode (which leaves remaining gas untouched) while Solidity\n     * uses an invalid opcode to revert (consuming all remaining gas).\n     *\n     * Requirements:\n     *\n     * - The divisor cannot be zero.\n     */\n    function div(uint256 a, uint256 b) internal pure returns (uint256) {\n        return div(a, b, \"SafeMath: division by zero\");\n    }\n\n    /**\n     * @dev Returns the integer division of two unsigned integers. Reverts with custom message on\n     * division by zero. The result is rounded towards zero.\n     *\n     * Counterpart to Solidity\u0027s `/` operator. Note: this function uses a\n     * `revert` opcode (which leaves remaining gas untouched) while Solidity\n     * uses an invalid opcode to revert (consuming all remaining gas).\n     *\n     * Requirements:\n     *\n     * - The divisor cannot be zero.\n     */\n    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {\n        require(b \u003e 0, errorMessage);\n        uint256 c = a / b;\n        // assert(a == b * c + a % b); // There is no case in which this doesn\u0027t hold\n\n        return c;\n    }\n\n    /**\n     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),\n     * Reverts when dividing by zero.\n     *\n     * Counterpart to Solidity\u0027s `%` operator. This function uses a `revert`\n     * opcode (which leaves remaining gas untouched) while Solidity uses an\n     * invalid opcode to revert (consuming all remaining gas).\n     *\n     * Requirements:\n     *\n     * - The divisor cannot be zero.\n     */\n    function mod(uint256 a, uint256 b) internal pure returns (uint256) {\n        return mod(a, b, \"SafeMath: modulo by zero\");\n    }\n\n    /**\n     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),\n     * Reverts with custom message when dividing by zero.\n     *\n     * Counterpart to Solidity\u0027s `%` operator. This function uses a `revert`\n     * opcode (which leaves remaining gas untouched) while Solidity uses an\n     * invalid opcode to revert (consuming all remaining gas).\n     *\n     * Requirements:\n     *\n     * - The divisor cannot be zero.\n     */\n    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {\n        require(b != 0, errorMessage);\n        return a % b;\n    }\n}"}}