Contract 0x7Ca29F0DB5Db8b88B332Aa1d67a2e89DfeC85E7E 2

 
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0x1f2c90830d7f201d9021d02187087a3c7c8d1b367f5e0e345cb979b4a0eb6804Exit203146772021-10-17 14:52:361 hr 10 mins ago0xa7d7b8d18fd20d256152d8186858002ad665b7e3 IN  0x7ca29f0db5db8b88b332aa1d67a2e89dfec85e7e0 MATIC0.0037227652
0xe3babc3a64eee3dd4cfacafe6114a17e2abcf7e18fb36f9c1bf6ebe5953163fcExit203144812021-10-17 14:45:521 hr 17 mins ago0xda488b642d0f4022783f6039456760cda2ec2050 IN  0x7ca29f0db5db8b88b332aa1d67a2e89dfec85e7e0 MATIC0.00378816
0x79ba93dba5a8d4484cf84b0a2f237da989e8446820926c51b72b1275b18010d2Exit203138512021-10-17 14:19:421 hr 43 mins ago0x1441af028610719fac5f59d35de232345e6c74c4 IN  0x7ca29f0db5db8b88b332aa1d67a2e89dfec85e7e0 MATIC0.00378816
0x8a11d5c4ff3f023b726c45aee2cb06a866d468af61f5986e5ffbf7ff75c0cb9fExit203128772021-10-17 13:33:022 hrs 29 mins ago0x41ff692f6f8c8a0c1612c9eedc33d0ece8f191f9 IN  0x7ca29f0db5db8b88b332aa1d67a2e89dfec85e7e0 MATIC0.0003030528
0x965b89df73df8c438f8b9af8efb1dadbbf881ce6a07f1b6f2b3ae66003220276Exit203115682021-10-17 12:35:123 hrs 27 mins ago0xf39080a5954863c3230dc2f22946d89a8184cdb0 IN  0x7ca29f0db5db8b88b332aa1d67a2e89dfec85e7e0 MATIC0.00378816
0x2161cfbf058e503168c276420346caa07569abc49709170855c1d06b52b337e3Exit203096452021-10-17 11:05:344 hrs 57 mins ago0xa97dbdc67236fd833b90bbed9464c4e2435603a9 IN  0x7ca29f0db5db8b88b332aa1d67a2e89dfec85e7e0 MATIC0.00378816
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0x561cfd436073e79c608c01d868227d8ffe4dbd06104daf2df5ca35bcca78fdb8Exit203083352021-10-17 10:06:065 hrs 56 mins ago0xb65b3661b497ba4d67964dfd20539e006a73dce3 IN  0x7ca29f0db5db8b88b332aa1d67a2e89dfec85e7e0 MATIC0.00327516
0x3d07de7ca5d214945c902acc5a3ced065b9a98fc5bdd5544f543ab662d1421b5Exit203078352021-10-17 9:41:586 hrs 20 mins ago0x01a2a10ed806d4e65ad92c2c6b10bc4d5f37001e IN  0x7ca29f0db5db8b88b332aa1d67a2e89dfec85e7e0 MATIC0.00378816
0xe3bbe54260728df70891e44eb37225ac2be4836876a046bd6da1031d529c6da6Exit203076152021-10-17 9:32:336 hrs 30 mins ago0x8251c0d706119f245e7e2871d0e59b64ab032fc3 IN  0x7ca29f0db5db8b88b332aa1d67a2e89dfec85e7e0 MATIC0.00327516
0xe9ce7eacfb554d1b9185169998d412f8e337786413604bea49cd046b6deec806Exit203031412021-10-17 6:26:579 hrs 35 mins ago0xb59f8c1555ba847ba42ef63f86984443dc94acf3 IN  0x7ca29f0db5db8b88b332aa1d67a2e89dfec85e7e0 MATIC0.00327516
0x7873a2d63a6d11162d3488687e537fa9a03598dc2b1dfd57d5ae069c96e7b9e7Exit203021482021-10-17 5:47:1910 hrs 15 mins ago0x548a62aabbbbec5ade870abaacd8cd5c55e0e9e9 IN  0x7ca29f0db5db8b88b332aa1d67a2e89dfec85e7e0 MATIC0.00342216
0xd4c392fcf9942bb1f7b05e309b218a15dc22263f6e4fa71042be2e825686797eExit202974502021-10-17 2:27:2313 hrs 35 mins ago0xd6cd56b69c2c345cdd98125ade6d25e1161d1a2e IN  0x7ca29f0db5db8b88b332aa1d67a2e89dfec85e7e0 MATIC0.0014073
0xffc54be7ca1ff88c525e9e6ef1869a5992fb285dd38675c74eeacfdc368f1ea4Exit202974492021-10-17 2:27:2113 hrs 35 mins ago0xd6cd56b69c2c345cdd98125ade6d25e1161d1a2e IN  0x7ca29f0db5db8b88b332aa1d67a2e89dfec85e7e0 MATIC0.0014073
0x41a6aab72fe3adfa04d4e47ac309dd069c2b14582f3a30b8b5fe5faa2b19c2baExit202974382021-10-17 2:26:5913 hrs 35 mins ago0xd6cd56b69c2c345cdd98125ade6d25e1161d1a2e IN  0x7ca29f0db5db8b88b332aa1d67a2e89dfec85e7e0 MATIC0.0014073
0x6c5989c1ca2fb328c574b65b6f913f32d29f824f4cb3de5da611cb429db1eaa9Exit202973492021-10-17 2:22:0113 hrs 40 mins ago0xd6cd56b69c2c345cdd98125ade6d25e1161d1a2e IN  0x7ca29f0db5db8b88b332aa1d67a2e89dfec85e7e0 MATIC0.00276216
0x0fd78d853aac161aabe349377011756ee1f7b260640f081c3860f5b7252cf099Exit202957942021-10-17 1:19:4714 hrs 43 mins ago0x68575571e75d2cfa4222e0f8e7053f056eb91d6c IN  0x7ca29f0db5db8b88b332aa1d67a2e89dfec85e7e0 MATIC0.00378816
0x2d2e1d347a0c35e3ad62041bcb50a080c62f1eed99cb5d50eba6991866a9672aExit202957562021-10-17 1:18:3114 hrs 44 mins ago0xab12253171a0d73df64b115cd43fe0a32feb9daa IN  0x7ca29f0db5db8b88b332aa1d67a2e89dfec85e7e0 MATIC0.00378816
0x4187a0d940860874ecc854c51c48d5849e5e6c06d36830f5f87b7227213c0b74Exit202939702021-10-17 0:06:5615 hrs 55 mins ago0x28b2d304ef768fe2582ed5c315a31523b7c3233d IN  0x7ca29f0db5db8b88b332aa1d67a2e89dfec85e7e0 MATIC0.00378816
0x913ee29079b9f6d1b6fa3a0b959699390c97924e367dda2cdc8485b81dc8e968Exit202937162021-10-16 23:56:4616 hrs 6 mins ago0x90f1fecf2abefd87410c3282d82c87d65a1afa90 IN  0x7ca29f0db5db8b88b332aa1d67a2e89dfec85e7e0 MATIC0.00327516
0x42dba0236ea49586c4ac5b0f79569cae6ddc5b6a652ff6cebe338675e5568f84Exit202910542021-10-16 22:05:1317 hrs 57 mins ago0xc6d48cffb4fb70888460377da776c2b4ff8842d5 IN  0x7ca29f0db5db8b88b332aa1d67a2e89dfec85e7e0 MATIC0.00327516
0xdde396ecd378e33ae68138fd2653f6504b43adbe539985c35ebce409ec312f20Exit202910502021-10-16 22:05:0517 hrs 57 mins ago0x74d69feafb469e314270e7fd17f49ffa4c775b35 IN  0x7ca29f0db5db8b88b332aa1d67a2e89dfec85e7e0 MATIC0.00327516
0xd4666d4bc383c22c308c9bb5365d848b2c68492399d6937f6d4398b4243d7abbExit202910082021-10-16 22:03:4117 hrs 59 mins ago0x3d100fa57e561d7c01ce11120596b540af9293c9 IN  0x7ca29f0db5db8b88b332aa1d67a2e89dfec85e7e0 MATIC0.00327516
0x460256e879fe4a3a0fce0ad1bfccf78a6bc4ad4f9de49bbdc858af9e81e0b5e5Exit202909682021-10-16 22:02:1718 hrs ago0xa0b28f8d1d26fd665f871473cf02539c6a050644 IN  0x7ca29f0db5db8b88b332aa1d67a2e89dfec85e7e0 MATIC0.00342216
0x69ad77b964a1b0736f44d173bc4efe480fb718ebd957a45be9f61858913e8be4Exit202909012021-10-16 21:58:3518 hrs 4 mins ago0x5223ca942a1b249cc38d691a4ac8b4e0f68e23cd IN  0x7ca29f0db5db8b88b332aa1d67a2e89dfec85e7e0 MATIC0.00327516
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Contract Source Code Verified (Similar Match)
Note: This contract matches the deployed ByteCode of the Source Code for Contract 0x4a73218ef2e820987c59f838906a82455f42d98b

Contract Name:
StakingRewards

Compiler Version
v0.5.17+commit.d19bba13

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion, MIT license

Contract Source Code (Solidity)

/**
 *Submitted for verification at polygonscan.com on 2021-06-16
*/

/**
 *Submitted for verification at Etherscan.io on 2020-09-16
*/

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 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, uint256 duration) 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 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]);
    }

    /* ========== 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, uint256 rewardsDuration) external onlyRewardsDistribution updateReward(address(0)) {
        require(block.timestamp.add(rewardsDuration) >= periodFinish, "Cannot reduce existing period");

        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, periodFinish);
    }

    /* ========== 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, uint256 periodFinish);
    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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Swarm Source

bzzr://c322ba88562bdec7ebb3d5d1adca9437e9d31218e4f8288f93c7a548433b0b3b
Block Transaction Gas Used Reward
Age Block Fee Address BC Fee Address Voting Power Jailed Incoming
Block Uncle Number Difficulty Gas Used Reward
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