Contract 0x2cc6a7A06B32E0796D8f9225E2e33ae51C93d715

 
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0x94de6a0e6440d809c9968940de8280c0b383a5599f56f4dc49b4ca2d2a90d190Get Reward202877852021-10-16 19:51:1520 hrs 42 mins ago0x20b2b48b92eb26d43fbd3af62f445a0cb0d9ed67 IN  0x2cc6a7a06b32e0796d8f9225e2e33ae51c93d7150 MATIC0.00230079
0x6dd7963fb6948ead39d78512c7d454b1d9d5620967b176e5b060039120062e8aGet Reward202852862021-10-16 18:13:4622 hrs 19 mins ago0x58a24fa9ae8847cbcf245dd2ef7fcef205927af1 IN  0x2cc6a7a06b32e0796d8f9225e2e33ae51c93d7150 MATIC0.00230079
0xc6084870f5c96092d66480484d417e1b467fc5b8aa571a5b12cab78250cf16aaExit202792912021-10-16 14:03:421 day 2 hrs ago0x7266454f97eaca03758affcde8dfbf89b8cef0c3 IN  0x2cc6a7a06b32e0796d8f9225e2e33ae51c93d7150 MATIC0.00332349
0xb15f4954950f8de18a5e3020225c86b058e4e49d46dc23084d8d0aee29571a69Get Reward202791592021-10-16 13:59:101 day 2 hrs ago0x7266454f97eaca03758affcde8dfbf89b8cef0c3 IN  0x2cc6a7a06b32e0796d8f9225e2e33ae51c93d7150 MATIC0.00230079
0x307b76138764388319d2d3e53d20a872b2f5eb4d46e9d17bf08333eff498142bGet Reward202786642021-10-16 13:33:401 day 2 hrs ago0x20b2b48b92eb26d43fbd3af62f445a0cb0d9ed67 IN  0x2cc6a7a06b32e0796d8f9225e2e33ae51c93d7150 MATIC0.003095169
0x08f457947b64d355fb572de70ae95612dbd8b321c00270fc4247d7c3a3de3441Get Reward202760872021-10-16 11:32:591 day 5 hrs ago0x4a747460ade361707c5def3f93f7332ff410b630 IN  0x2cc6a7a06b32e0796d8f9225e2e33ae51c93d7150 MATIC0.00230079
0x52bb8f8b856604a3b2533b8dae706d8f4adcb93595f126a0889c8dbd1793661cExit202491332021-10-15 16:36:341 day 23 hrs ago0xc31372db84e456193e72a162928539c8f5999ff6 IN  0x2cc6a7a06b32e0796d8f9225e2e33ae51c93d7150 MATIC0.00332349
0x17c949f437c1ccaa186f3e2f9141ab95251665f146a218a46361dcd466f84f1eGet Reward202491282021-10-15 16:36:141 day 23 hrs ago0xc31372db84e456193e72a162928539c8f5999ff6 IN  0x2cc6a7a06b32e0796d8f9225e2e33ae51c93d7150 MATIC0.00193479
0xd6067f690cae603d8a15243d7d6bdce37a0f1ecab08f09f30133c700c7c05b15Get Reward202436752021-10-15 12:58:092 days 3 hrs ago0x20b2b48b92eb26d43fbd3af62f445a0cb0d9ed67 IN  0x2cc6a7a06b32e0796d8f9225e2e33ae51c93d7150 MATIC0.00230079
0x2863a097699a0f3c3b9d9847dc80251f5131e9b6b06ce60b4c7c42b00a25c9e5Stake With Permi...202341882021-10-15 5:46:502 days 10 hrs ago0x42a60d2f2ffa2150c568010a8d425f0aad284fd2 IN  0x2cc6a7a06b32e0796d8f9225e2e33ae51c93d7150 MATIC0.00532585
0x61be959f3934feab8cf3cb0a40738e8a4422d280a4361d62b2b1dac207175fe8Get Reward202341442021-10-15 5:44:162 days 10 hrs ago0x42a60d2f2ffa2150c568010a8d425f0aad284fd2 IN  0x2cc6a7a06b32e0796d8f9225e2e33ae51c93d7150 MATIC0.00383465
0x99db11173b4a47de2cd24f904e111b42fd61bb9872f3275224e00a6898f5debfGet Reward202340722021-10-15 5:40:422 days 10 hrs ago0x49848c2eaba520dc3fe7f214f11a233b6d605ef4 IN  0x2cc6a7a06b32e0796d8f9225e2e33ae51c93d7150 MATIC0.00230079
0x7e4207754649115281587a7f5e32a814e6bf7cb132acf84bc932b112cd90f926Get Reward202211932021-10-14 20:43:322 days 19 hrs ago0x20b2b48b92eb26d43fbd3af62f445a0cb0d9ed67 IN  0x2cc6a7a06b32e0796d8f9225e2e33ae51c93d7150 MATIC0.003095169
0x49c53a3a51e748d0f5ff4ec8e4738e21108ccd6cb06751db20f64ef449583ca3Get Reward202158552021-10-14 16:54:112 days 23 hrs ago0x510c0fcbd5fe56af9f5b23f7b7c4ad0bff2b5b00 IN  0x2cc6a7a06b32e0796d8f9225e2e33ae51c93d7150 MATIC0.00230079
0x0058ca9f70c94f11660a6b6d1d717cbfbcd9bbf1c346aa44e2ee098e76356dbbGet Reward202068042021-10-14 10:46:283 days 5 hrs ago0x20b2b48b92eb26d43fbd3af62f445a0cb0d9ed67 IN  0x2cc6a7a06b32e0796d8f9225e2e33ae51c93d7150 MATIC0.00153386
0x84ccc176166d51ec3be15a166282c251e6577b03c3753f2045904a0689457538Get Reward201874982021-10-13 21:48:193 days 18 hrs ago0x5e7e0de7f749c43126eec09ee32f3e060c65ea90 IN  0x2cc6a7a06b32e0796d8f9225e2e33ae51c93d7150 MATIC0.002530869
0xdac7742bfedfbf160f376a2d75aac287382f7b28ae665611ac5142516001a863Get Reward201777022021-10-13 15:28:554 days 1 hr ago0x20b2b48b92eb26d43fbd3af62f445a0cb0d9ed67 IN  0x2cc6a7a06b32e0796d8f9225e2e33ae51c93d7150 MATIC0.002530869
0x8b7e39804b4dc4c668e87a3ac130035a67bef4c6893274e99cf6d08735183577Get Reward201603042021-10-13 3:41:104 days 12 hrs ago0x20b2b48b92eb26d43fbd3af62f445a0cb0d9ed67 IN  0x2cc6a7a06b32e0796d8f9225e2e33ae51c93d7150 MATIC0.00230079
0x39907c8169e6f8829fc4526b8984df53a58ef6c10a6809de3d73850ef7b51cbbGet Reward201562502021-10-13 1:07:214 days 15 hrs ago0xaabd5fbcb8ad62d4fbbb02a2e9769a9f2ee7e883 IN  0x2cc6a7a06b32e0796d8f9225e2e33ae51c93d7150 MATIC0.00076769693
0x9b84e812e74920844d98c5b21ddb3693b9765530559669fb207da3e79f4871c4Stake With Permi...201398432021-10-12 14:13:295 days 2 hrs ago0x5f86b149b2f2e51911e3cd719f34eba439d2da5a IN  0x2cc6a7a06b32e0796d8f9225e2e33ae51c93d7150 MATIC0.00311046
0x35e9136d3321938bebd6855f3e9ce72d9940f85d859d1edb343745e5ad9c2d1fExit201393302021-10-12 13:55:095 days 2 hrs ago0x5f86b149b2f2e51911e3cd719f34eba439d2da5a IN  0x2cc6a7a06b32e0796d8f9225e2e33ae51c93d7150 MATIC0.00281049
0x7298d7747d4ad8ab88138861dc6665b272f6fde081fde7df5065c11d9d1e1b76Get Reward201393272021-10-12 13:54:595 days 2 hrs ago0x5f86b149b2f2e51911e3cd719f34eba439d2da5a IN  0x2cc6a7a06b32e0796d8f9225e2e33ae51c93d7150 MATIC0.00230079
0x56f79b842badaee112e7a94a6154fdf57f15378cf9fce421e5b5ad18b00e6af3Stake With Permi...201379822021-10-12 13:04:275 days 3 hrs ago0x12389f7a1a5d2a7f8e176c7a734ee5328ab4b948 IN  0x2cc6a7a06b32e0796d8f9225e2e33ae51c93d7150 MATIC0.00319587
0x072206c0cf1e77ccc45ea0fee02828a7500092cb81ee0adb490a2307b40e0e60Get Reward201376812021-10-12 12:54:095 days 3 hrs ago0x12389f7a1a5d2a7f8e176c7a734ee5328ab4b948 IN  0x2cc6a7a06b32e0796d8f9225e2e33ae51c93d7150 MATIC0.00230079
0x8bb49c6e64ac069784d6a6da4d6f0b180136639ec258d0466f4964cb247c8de4Get Reward201375272021-10-12 12:44:335 days 3 hrs ago0x20b2b48b92eb26d43fbd3af62f445a0cb0d9ed67 IN  0x2cc6a7a06b32e0796d8f9225e2e33ae51c93d7150 MATIC0.00230079
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Contract Source Code Verified (Similar Match)
Note: This contract matches the deployed ByteCode of the Source Code for Contract 0x1c30cfe08506ba215c02bc2723c6d310671bab62

Contract Name:
StakingRewards

Compiler Version
v0.5.16+commit.9c3226ce

Optimization Enabled:
No with 200 runs

Other Settings:
default evmVersion, None license

Contract Source Code (Solidity)

/**
 *Submitted for verification at polygonscan.com on 2021-06-30
*/

pragma solidity ^0.5.16;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a >= b ? a : b;
    }

    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two numbers. The result is rounded towards
     * zero.
     */
    function average(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b) / 2 can overflow, so we distribute
        return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2);
    }
}

/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
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) {
        require(b <= a, "SafeMath: subtraction overflow");
        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-solidity/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) {
        // Solidity only automatically asserts when dividing by 0
        require(b > 0, "SafeMath: division by zero");
        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) {
        require(b != 0, "SafeMath: modulo by zero");
        return a % b;
    }
}

/**
 * @dev Interface of the ERC20 standard as defined in the EIP. Does not include
 * the optional functions; to access them see `ERC20Detailed`.
 */
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.
     *
     * > 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);
}

/**
 * @dev Optional functions from the ERC20 standard.
 */
contract ERC20Detailed is IERC20 {
    string private _name;
    string private _symbol;
    uint8 private _decimals;

    /**
     * @dev Sets the values for `name`, `symbol`, and `decimals`. All three of
     * these values are immutable: they can only be set once during
     * construction.
     */
    constructor (string memory name, string memory symbol, uint8 decimals) public {
        _name = name;
        _symbol = symbol;
        _decimals = decimals;
    }

    /**
     * @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.
     *
     * > Note that 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 Collection of functions related to the address type,
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * This test is non-exhaustive, and there may be false-negatives: during the
     * execution of a contract's constructor, its address will be reported as
     * not containing a contract.
     *
     * > It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies in extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        // solhint-disable-next-line no-inline-assembly
        assembly { size := extcodesize(account) }
        return size > 0;
    }
}

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for ERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
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 {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        // solhint-disable-next-line max-line-length
        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);
        callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves.

        // A Solidity high level call has three parts:
        //  1. The target address is checked to verify it contains contract code
        //  2. The call itself is made, and success asserted
        //  3. The return value is decoded, which in turn checks the size of the returned data.
        // solhint-disable-next-line max-line-length
        require(address(token).isContract(), "SafeERC20: call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = address(token).call(data);
        require(success, "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");
        }
    }
}

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the `nonReentrant` modifier
 * available, which can be aplied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 */
contract ReentrancyGuard {
    /// @dev counter to allow mutex lock with only one SSTORE operation
    uint256 private _guardCounter;

    constructor () internal {
        // The counter starts at one to prevent changing it from zero to a non-zero
        // value, which is a more expensive operation.
        _guardCounter = 1;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and make it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _guardCounter += 1;
        uint256 localCounter = _guardCounter;
        _;
        require(localCounter == _guardCounter, "ReentrancyGuard: reentrant call");
    }
}

// Inheritancea
interface IStakingRewards {
    // Views
    function lastTimeRewardApplicable() external view returns (uint256);

    function rewardPerToken() external view returns (uint256);

    function earned(address account) external view returns (uint256);

    function getRewardForDuration() external view returns (uint256);

    function totalSupply() external view returns (uint256);

    function balanceOf(address account) external view returns (uint256);

    // Mutative

    function stake(uint256 amount) external;

    function withdraw(uint256 amount) external;

    function getReward() external;

    function exit() external;
}

contract RewardsDistributionRecipient {
    address public rewardsDistribution;

    function notifyRewardAmount(uint256 reward) external;

    modifier onlyRewardsDistribution() {
        require(msg.sender == rewardsDistribution, "Caller is not RewardsDistribution contract");
        _;
    }
}

contract StakingRewards is IStakingRewards, RewardsDistributionRecipient, ReentrancyGuard {
    using SafeMath for uint256;
    using SafeERC20 for IERC20;

    /* ========== STATE VARIABLES ========== */

    IERC20 public rewardsToken;
    IERC20 public stakingToken;
    uint256 public periodFinish = 0;
    uint256 public rewardRate = 0;
    uint256 public rewardsDuration = 7 days;
    uint256 public lastUpdateTime;
    uint256 public rewardPerTokenStored;

    mapping(address => uint256) public userRewardPerTokenPaid;
    mapping(address => uint256) public rewards;

    uint256 private _totalSupply;
    mapping(address => uint256) private _balances;

    /* ========== CONSTRUCTOR ========== */

    constructor(
        address _rewardsDistribution,
        address _rewardsToken,
        address _stakingToken
    ) public {
        rewardsToken = IERC20(_rewardsToken);
        stakingToken = IERC20(_stakingToken);
        rewardsDistribution = _rewardsDistribution;
    }

    /* ========== VIEWS ========== */

    function totalSupply() external view returns (uint256) {
        return _totalSupply;
    }

    function balanceOf(address account) external view returns (uint256) {
        return _balances[account];
    }

    function lastTimeRewardApplicable() public view returns (uint256) {
        return Math.min(block.timestamp, periodFinish);
    }

    function rewardPerToken() public view returns (uint256) {
        if (_totalSupply == 0) {
            return rewardPerTokenStored;
        }
        return
            rewardPerTokenStored.add(
                lastTimeRewardApplicable().sub(lastUpdateTime).mul(rewardRate).mul(1e18).div(_totalSupply)
            );
    }

    function earned(address account) public view returns (uint256) {
        return _balances[account].mul(rewardPerToken().sub(userRewardPerTokenPaid[account])).div(1e18).add(rewards[account]);
    }

    function getRewardForDuration() external view returns (uint256) {
        return rewardRate.mul(rewardsDuration);
    }

    /* ========== MUTATIVE FUNCTIONS ========== */

    function stakeWithPermit(uint256 amount, uint deadline, uint8 v, bytes32 r, bytes32 s) external nonReentrant updateReward(msg.sender) {
        require(amount > 0, "Cannot stake 0");
        _totalSupply = _totalSupply.add(amount);
        _balances[msg.sender] = _balances[msg.sender].add(amount);

        // permit
        IUniswapV2ERC20(address(stakingToken)).permit(msg.sender, address(this), amount, deadline, v, r, s);

        stakingToken.safeTransferFrom(msg.sender, address(this), amount);
        emit Staked(msg.sender, amount);
    }

    function stake(uint256 amount) external nonReentrant updateReward(msg.sender) {
        require(amount > 0, "Cannot stake 0");
        _totalSupply = _totalSupply.add(amount);
        _balances[msg.sender] = _balances[msg.sender].add(amount);
        stakingToken.safeTransferFrom(msg.sender, address(this), amount);
        emit Staked(msg.sender, amount);
    }

    function withdraw(uint256 amount) public nonReentrant updateReward(msg.sender) {
        require(amount > 0, "Cannot withdraw 0");
        _totalSupply = _totalSupply.sub(amount);
        _balances[msg.sender] = _balances[msg.sender].sub(amount);
        stakingToken.safeTransfer(msg.sender, amount);
        emit Withdrawn(msg.sender, amount);
    }

    function getReward() public nonReentrant updateReward(msg.sender) {
        uint256 reward = rewards[msg.sender];
        if (reward > 0) {
            rewards[msg.sender] = 0;
            rewardsToken.safeTransfer(msg.sender, reward);
            emit RewardPaid(msg.sender, reward);
        }
    }

    function exit() external {
        withdraw(_balances[msg.sender]);
        getReward();
    }

    /* ========== RESTRICTED FUNCTIONS ========== */

    function notifyRewardAmount(uint256 reward) external onlyRewardsDistribution updateReward(address(0)) {
        if (block.timestamp >= periodFinish) {
            rewardRate = reward.div(rewardsDuration);
        } else {
            uint256 remaining = periodFinish.sub(block.timestamp);
            uint256 leftover = remaining.mul(rewardRate);
            rewardRate = reward.add(leftover).div(rewardsDuration);
        }

        // Ensure the provided reward amount is not more than the balance in the contract.
        // This keeps the reward rate in the right range, preventing overflows due to
        // very high values of rewardRate in the earned and rewardsPerToken functions;
        // Reward + leftover must be less than 2^256 / 10^18 to avoid overflow.
        uint balance = rewardsToken.balanceOf(address(this));
        require(rewardRate <= balance.div(rewardsDuration), "Provided reward too high");

        lastUpdateTime = block.timestamp;
        periodFinish = block.timestamp.add(rewardsDuration);
        emit RewardAdded(reward);
    }

    /* ========== MODIFIERS ========== */

    modifier updateReward(address account) {
        rewardPerTokenStored = rewardPerToken();
        lastUpdateTime = lastTimeRewardApplicable();
        if (account != address(0)) {
            rewards[account] = earned(account);
            userRewardPerTokenPaid[account] = rewardPerTokenStored;
        }
        _;
    }

    /* ========== EVENTS ========== */

    event RewardAdded(uint256 reward);
    event Staked(address indexed user, uint256 amount);
    event Withdrawn(address indexed user, uint256 amount);
    event RewardPaid(address indexed user, uint256 reward);
}

interface IUniswapV2ERC20 {
    function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;
}

Contract Security Audit

Contract ABI

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IERC20","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"stake","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"stakeWithPermit","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"stakingToken","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"userRewardPerTokenPaid","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"withdraw","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"}]

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