Contract 0x5749c1374cc9DE28B94cf054dEb303D4cA3464bF

Contract Overview

Polaris Finance: Polar Reward Pool
Balance:
0 ETH

ETH Value:
$0.00

Token:
Txn Hash Method
Block
From
To
Value [Txn Fee]
0xe051afb553b6c2c3e2acde16064c0679d9615dd76a77f7fe5c6f892c47e57aabSet Operator671775282022-06-06 22:33:36113 days 17 hrs agoPolaris Finance: DEV Wallet IN  Polaris Finance: Polar Reward Pool0 ETH0.00000065547
0xe73dbc9dad4f489e61d7cbe6c2fe9946c1f0f18957a3817de36bbfc1b89e2b32Withdraw623951542022-03-29 7:21:24183 days 8 hrs ago0x76a143b7e5a5d1a1de5edd92e9d2c27cd9c5e8c6 IN  Polaris Finance: Polar Reward Pool0 ETH0.00000150255
0x7b53eabe13bbd177da76b61013ce88aa73d09efdb0ec274d0d00cd8cd645b106Withdraw609275402022-03-07 8:24:44205 days 7 hrs ago0xfe3a593fb8a90185a8e31edc8eb02e7d889d52f0 IN  Polaris Finance: Polar Reward Pool0 ETH0.00000150255
0xffe06aae703f33371581510b2d278c1563b25cce3cda8e7574aa094be9266006Withdraw606211012022-03-02 21:58:24209 days 17 hrs ago0x1451436326707f295eae48f43c1a8cf1476e25f1 IN  Polaris Finance: Polar Reward Pool0 ETH0
0x21020ad9857da39534f67f6ae4106f56a7e8359d78b3ed677879f2257a482518Withdraw598941982022-02-20 8:19:10220 days 7 hrs ago0x4dadcd19c4ea1c90f4c9c9794c238bd626c2f602 IN  Polaris Finance: Polar Reward Pool0 ETH0.00000247572
0x45fd4286145d50b68f1c79607b505a4545d62a59c8d3c32bd9c493d9eecb40aeWithdraw598515182022-02-19 16:43:17220 days 22 hrs ago0x9bdbdb4a8f7f816c87a67f5281484ed902c6b942 IN  Polaris Finance: Polar Reward Pool0 ETH0.00000247536
0xd0c35b9d281f6b0ec145b51250066e42f98a8626c8dff1211598c9c1e95893e6Withdraw598474692022-02-19 15:00:37221 days 36 mins ago0x4e3b67443fa27e43840b6a768cd7a187ed271f5a IN  Polaris Finance: Polar Reward Pool0 ETH0.00000176616
0xa190144053c48838d1b667309d9c4e175e13b99beed27848207c60c7c1852990Withdraw598459582022-02-19 13:58:26221 days 1 hr ago0x6586185c2b16e620db0ab02e7fca0c66dee7c9ea IN  Polaris Finance: Polar Reward Pool0 ETH0.00000176616
0x20a175e9a51e3ee130dc67d296c916299faa0553a645bacefad043989c394787Withdraw598337912022-02-19 9:23:56221 days 6 hrs ago0xf9dd6696ae86ebe3a86b6c508a8c24222c609317 IN  Polaris Finance: Polar Reward Pool0 ETH0.00000247572
0xa3a8c1d083aea4b656dcc7432e5a428cf7f03919a7b2aab7f6668e3443e6943fWithdraw598312082022-02-19 8:25:30221 days 7 hrs ago0x13e34689deafb89f3f70d662056c1eb3f3d37cfb IN  Polaris Finance: Polar Reward Pool0 ETH0.00000176652
0xbbe1f1f0cc2c5475f7ac0379abe0017b9e4157f4f5c7e4f8e18dbb34605dd368Withdraw598292532022-02-19 7:41:13221 days 7 hrs ago0xaba218b589941637a36a0aff2dc042a730dc5ba3 IN  Polaris Finance: Polar Reward Pool0 ETH0.00000176652
0xab6b894f903f022ccb58e30b149ca67b4aa82d3299f03d61fd1144f0903cc463Deposit598292192022-02-19 7:40:27221 days 7 hrs ago0xaba218b589941637a36a0aff2dc042a730dc5ba3 IN  Polaris Finance: Polar Reward Pool0 ETH0.00000313833
0x03ea74bc6ca5aed0e648a496294328304833b5f8d7f1742de7a9f8d67f5e16bcWithdraw598289292022-02-19 7:33:51221 days 8 hrs ago0xaba218b589941637a36a0aff2dc042a730dc5ba3 IN  Polaris Finance: Polar Reward Pool0 ETH0.00000176652
0x0f70416de68602d7d54331e212909e148e8fe99725da41bab268844922a1d552Deposit598286952022-02-19 7:28:28221 days 8 hrs ago0xaba218b589941637a36a0aff2dc042a730dc5ba3 IN  Polaris Finance: Polar Reward Pool0 ETH0.00000313833
0x5867be5bf00a85a25de02a5089097e118708c7b122725f0673d046a66ec83a77Deposit598276412022-02-19 7:04:32221 days 8 hrs ago0x76b60dcf71da2294f8aa034432d925d1eed8cf68 IN  Polaris Finance: Polar Reward Pool0 ETH0.00000313797
0xfebf7df52be539e573a7fbdaf941ee02ac7e9a42333be9f20f423d5015389c63Withdraw598234672022-02-19 5:30:21221 days 10 hrs ago0xb1062489871245336a610a473c9cea137d7c9477 IN  Polaris Finance: Polar Reward Pool0 ETH0.00000241572
0xa4fdbeea7341b602b6175611c44ea274578ac2b6b0ef894116417fc7c327904cWithdraw598211112022-02-19 4:37:15221 days 11 hrs ago0x85ca96fe4119b8370f3b78a72fb2ffc8e77b76e0 IN  Polaris Finance: Polar Reward Pool0 ETH0.00000241572
0xabb40bd1e8a9ff083a7befc294865d108f3857833a48b90ec05edb61f0298d54Deposit598207712022-02-19 4:29:38221 days 11 hrs ago0x4e3b67443fa27e43840b6a768cd7a187ed271f5a IN  Polaris Finance: Polar Reward Pool0 ETH0.00000313797
0x9a75ac9357c597e4577c05dcd6d49cfd909bcf1ea87de1e9f7912a9a09b947d8Withdraw598204532022-02-19 4:22:30221 days 11 hrs ago0xad4f13c18ea481170d8f0e624cf95f20e15b3dfa IN  Polaris Finance: Polar Reward Pool0 ETH0.00000176616
0xf5572f5bc8ddc8e61d0de2215f3bb67c39717a7a74153a365323c4abf7c74504Deposit598204062022-02-19 4:21:26221 days 11 hrs ago0xad4f13c18ea481170d8f0e624cf95f20e15b3dfa IN  Polaris Finance: Polar Reward Pool0 ETH0.00000163263
0x9b98245e14612731683910e8c5960c63b36c801e4a2b3bdf4caa220c11a51aa8Deposit598203682022-02-19 4:20:35221 days 11 hrs ago0xad4f13c18ea481170d8f0e624cf95f20e15b3dfa IN  Polaris Finance: Polar Reward Pool0 ETH0.00000313797
0x50d5781ef45a8e2a5a3cb83dffd25c0166f59876a87351b1918094291ea303c0Withdraw598178072022-02-19 3:22:59221 days 12 hrs ago0x7352680e6e0a6d02a7a6a82845fff908ff2c1d29 IN  Polaris Finance: Polar Reward Pool0 ETH0.00000176652
0xdbe7617b7a4cfa4dd89663b583e79c65a844b7111b999e91f5baed8bd4da6744Withdraw598175882022-02-19 3:18:04221 days 12 hrs ago0x05c2317a6d483d9108be0df1240b953e0b0ee9ea IN  Polaris Finance: Polar Reward Pool0 ETH0.00000241572
0x11238ad8e8bae47da3db2d92df3f3f8a0ce23fbb6eb70925366200a60e709cf1Deposit598172142022-02-19 3:09:40221 days 12 hrs ago0x7352680e6e0a6d02a7a6a82845fff908ff2c1d29 IN  Polaris Finance: Polar Reward Pool0 ETH0.00000313833
0x6700d5ab21a2bbd39913a0b96886c49b57b54849863295f7c068d52733208a87Withdraw598161762022-02-19 2:46:10221 days 12 hrs ago0x07d4db10ed021d0937f79bd16962253dcd401c51 IN  Polaris Finance: Polar Reward Pool0 ETH0.00000247572
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Contract Source Code Verified (Exact Match)

Contract Name:
PolarRewardPool

Compiler Version
v0.6.12+commit.27d51765

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion, MIT license
File 1 of 5 : PolarRewardPool.sol
// SPDX-License-Identifier: MIT

pragma solidity 0.6.12;

import "IERC20.sol";
import "SafeERC20.sol";
import "SafeMath.sol";

// Note that this pool has no minter key of POLAR (rewards).
// Instead, the governance will call POLAR distributeReward method and send reward to this pool at the beginning.
contract PolarRewardPool {
    using SafeMath for uint256;
    using SafeERC20 for IERC20;

    // governance
    address public operator;

    // Info of each user.
    struct UserInfo {
        uint256 amount; // How many LP tokens the user has provided.
        uint256 rewardDebt; // Reward debt. See explanation below.
    }

    // Info of each pool.
    struct PoolInfo {
        IERC20 token; // Address of LP token contract.
        uint256 allocPoint; // How many allocation points assigned to this pool. POLARs to distribute in the pool.
        uint256 lastRewardTime; // Last time that POLARs distribution occurred.
        uint256 accPolarPerShare; // Accumulated POLARs per share, times 1e18. See below.
        bool isStarted; // if lastRewardTime has passed
    }

    IERC20 public polar;

    // Info of each pool.
    PoolInfo[] public poolInfo;

    // Info of each user that stakes LP tokens.
    mapping(uint256 => mapping(address => UserInfo)) public userInfo;

    // Total allocation points. Must be the sum of all allocation points in all pools.
    uint256 public totalAllocPoint = 0;

    // The time when POLAR mining starts.
    uint256 public poolStartTime;

    uint256[] public epochTotalRewards = [2000e18, 8000e18];

    // Time when each epoch ends.
    uint256[3] public epochEndTimes;

    // Reward per second for each of 2 epochs (last item is equal to 0 - for sanity).
    uint256[3] public epochPolarPerSecond;

    event Deposit(address indexed user, uint256 indexed pid, uint256 amount);
    event Withdraw(address indexed user, uint256 indexed pid, uint256 amount);
    event EmergencyWithdraw(address indexed user, uint256 indexed pid, uint256 amount);
    event RewardPaid(address indexed user, uint256 amount);

    constructor(address _polar, uint256 _poolStartTime) public {
        require(block.timestamp < _poolStartTime, "late");
        if (_polar != address(0)) polar = IERC20(_polar);

        poolStartTime = _poolStartTime;

        epochEndTimes[0] = poolStartTime + 1 days; // Day 2-3
        epochEndTimes[1] = epochEndTimes[0] + 8 days; // Day 3-10

        epochPolarPerSecond[0] = epochTotalRewards[0].div(1 days);
        epochPolarPerSecond[1] = epochTotalRewards[1].div(8 days);

        epochPolarPerSecond[2] = 0;
        operator = msg.sender;
    }

    modifier onlyOperator() {
        require(operator == msg.sender, "PolarRewardPool: caller is not the operator");
        _;
    }

    function checkPoolDuplicate(IERC20 _token) internal view {
        uint256 length = poolInfo.length;
        for (uint256 pid = 0; pid < length; ++pid) {
            require(poolInfo[pid].token != _token, "PolarRewardPool: existing pool?");
        }
    }

    // Add a new token to the pool. Can only be called by the owner.
    function add(
        uint256 _allocPoint,
        IERC20 _token,
        bool _withUpdate,
        uint256 _lastRewardTime
    ) public onlyOperator {
        checkPoolDuplicate(_token);
        if (_withUpdate) {
            massUpdatePools();
        }
        if (block.timestamp < poolStartTime) {
            // chef is sleeping
            if (_lastRewardTime == 0) {
                _lastRewardTime = poolStartTime;
            } else {
                if (_lastRewardTime < poolStartTime) {
                    _lastRewardTime = poolStartTime;
                }
            }
        } else {
            // chef is cooking
            if (_lastRewardTime == 0 || _lastRewardTime < block.timestamp) {
                _lastRewardTime = block.timestamp;
            }
        }
        bool _isStarted = (_lastRewardTime <= poolStartTime) || (_lastRewardTime <= block.timestamp);
        poolInfo.push(PoolInfo({token: _token, allocPoint: _allocPoint, lastRewardTime: _lastRewardTime, accPolarPerShare: 0, isStarted: _isStarted}));
        if (_isStarted) {
            totalAllocPoint = totalAllocPoint.add(_allocPoint);
        }
    }

    // Update the given pool's POLAR allocation point. Can only be called by the owner.
    function set(uint256 _pid, uint256 _allocPoint) public onlyOperator {
        massUpdatePools();
        PoolInfo storage pool = poolInfo[_pid];
        if (pool.isStarted) {
            totalAllocPoint = totalAllocPoint.sub(pool.allocPoint).add(_allocPoint);
        }
        pool.allocPoint = _allocPoint;
    }

    // Return accumulate rewards over the given _fromTime to _toTime.
    function getGeneratedReward(uint256 _fromTime, uint256 _toTime) public view returns (uint256) {
        for (uint8 epochId = 2; epochId >= 1; --epochId) {
            if (_toTime >= epochEndTimes[epochId - 1]) {
                if (_fromTime >= epochEndTimes[epochId - 1]) {
                    return _toTime.sub(_fromTime).mul(epochPolarPerSecond[epochId]);
                }

                uint256 _generatedReward = _toTime.sub(epochEndTimes[epochId - 1]).mul(epochPolarPerSecond[epochId]);
                if (epochId == 1) {
                    return _generatedReward.add(epochEndTimes[0].sub(_fromTime).mul(epochPolarPerSecond[0]));
                }
                for (epochId = epochId - 1; epochId >= 1; --epochId) {
                    if (_fromTime >= epochEndTimes[epochId - 1]) {
                        return _generatedReward.add(epochEndTimes[epochId].sub(_fromTime).mul(epochPolarPerSecond[epochId]));
                    }
                    _generatedReward = _generatedReward.add(epochEndTimes[epochId].sub(epochEndTimes[epochId - 1]).mul(epochPolarPerSecond[epochId]));
                }
                return _generatedReward.add(epochEndTimes[0].sub(_fromTime).mul(epochPolarPerSecond[0]));
            }
        }
        return _toTime.sub(_fromTime).mul(epochPolarPerSecond[0]);
    }

    // View function to see pending POLARs on frontend.
    function pendingPOLAR(uint256 _pid, address _user) external view returns (uint256) {
        PoolInfo storage pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][_user];
        uint256 accPolarPerShare = pool.accPolarPerShare;
        uint256 tokenSupply = pool.token.balanceOf(address(this));
        if (block.timestamp > pool.lastRewardTime && tokenSupply != 0) {
            uint256 _generatedReward = getGeneratedReward(pool.lastRewardTime, block.timestamp);
            uint256 _polarReward = _generatedReward.mul(pool.allocPoint).div(totalAllocPoint);
            accPolarPerShare = accPolarPerShare.add(_polarReward.mul(1e18).div(tokenSupply));
        }
        return user.amount.mul(accPolarPerShare).div(1e18).sub(user.rewardDebt);
    }

    // Update reward variables for all pools. Be careful of gas spending!
    function massUpdatePools() public {
        uint256 length = poolInfo.length;
        for (uint256 pid = 0; pid < length; ++pid) {
            updatePool(pid);
        }
    }

    // Update reward variables of the given pool to be up-to-date.
    function updatePool(uint256 _pid) public {
        PoolInfo storage pool = poolInfo[_pid];
        if (block.timestamp <= pool.lastRewardTime) {
            return;
        }
        uint256 tokenSupply = pool.token.balanceOf(address(this));
        if (tokenSupply == 0) {
            pool.lastRewardTime = block.timestamp;
            return;
        }
        if (!pool.isStarted) {
            pool.isStarted = true;
            totalAllocPoint = totalAllocPoint.add(pool.allocPoint);
        }
        if (totalAllocPoint > 0) {
            uint256 _generatedReward = getGeneratedReward(pool.lastRewardTime, block.timestamp);
            uint256 _polarReward = _generatedReward.mul(pool.allocPoint).div(totalAllocPoint);
            pool.accPolarPerShare = pool.accPolarPerShare.add(_polarReward.mul(1e18).div(tokenSupply));
        }
        pool.lastRewardTime = block.timestamp;
    }

    // Deposit LP tokens.
    function deposit(uint256 _pid, uint256 _amount) public {
        address _sender = msg.sender;
        PoolInfo storage pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][_sender];
        updatePool(_pid);
        if (user.amount > 0) {
            uint256 _pending = user.amount.mul(pool.accPolarPerShare).div(1e18).sub(user.rewardDebt);
            if (_pending > 0) {
                safePolarTransfer(_sender, _pending);
                emit RewardPaid(_sender, _pending);
            }
        }
        if (_amount > 0) {
            pool.token.safeTransferFrom(_sender, address(this), _amount);
            user.amount = user.amount.add(_amount);
        }
        user.rewardDebt = user.amount.mul(pool.accPolarPerShare).div(1e18);
        emit Deposit(_sender, _pid, _amount);
    }

    // Withdraw LP tokens.
    function withdraw(uint256 _pid, uint256 _amount) public {
        address _sender = msg.sender;
        PoolInfo storage pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][_sender];
        require(user.amount >= _amount, "withdraw: not good");
        updatePool(_pid);
        uint256 _pending = user.amount.mul(pool.accPolarPerShare).div(1e18).sub(user.rewardDebt);
        if (_pending > 0) {
            safePolarTransfer(_sender, _pending);
            emit RewardPaid(_sender, _pending);
        }
        if (_amount > 0) {
            user.amount = user.amount.sub(_amount);
            pool.token.safeTransfer(_sender, _amount);
        }
        user.rewardDebt = user.amount.mul(pool.accPolarPerShare).div(1e18);
        emit Withdraw(_sender, _pid, _amount);
    }

    // Withdraw without caring about rewards. EMERGENCY ONLY.
    function emergencyWithdraw(uint256 _pid) public {
        PoolInfo storage pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][msg.sender];
        uint256 _amount = user.amount;
        user.amount = 0;
        user.rewardDebt = 0;
        pool.token.safeTransfer(msg.sender, _amount);
        emit EmergencyWithdraw(msg.sender, _pid, _amount);
    }

    // Safe polar transfer function, just in case if rounding error causes pool to not have enough POLARs.
    function safePolarTransfer(address _to, uint256 _amount) internal {
        uint256 _polarBal = polar.balanceOf(address(this));
        if (_polarBal > 0) {
            if (_amount > _polarBal) {
                polar.safeTransfer(_to, _polarBal);
            } else {
                polar.safeTransfer(_to, _amount);
            }
        }
    }

    function setOperator(address _operator) external onlyOperator {
        operator = _operator;
    }

    function governanceRecoverUnsupported(
        IERC20 _token,
        uint256 amount,
        address to
    ) external onlyOperator {
        if (block.timestamp < epochEndTimes[1] + 30 days) {
            // do not allow to drain token if less than 30 days after farming
            require(_token != polar, "!polar");
            uint256 length = poolInfo.length;
            for (uint256 pid = 0; pid < length; ++pid) {
                PoolInfo storage pool = poolInfo[pid];
                require(_token != pool.token, "!pool.token");
            }
        }
        _token.safeTransfer(to, amount);
    }
}

File 2 of 5 : IERC20.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/**
 * @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);
}

File 3 of 5 : SafeERC20.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

import "IERC20.sol";
import "SafeMath.sol";
import "Address.sol";

/**
 * @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 IERC20;` 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));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    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, "SafeERC20: decreased allowance below zero");
        _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. We use {Address.functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        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");
        }
    }
}

File 4 of 5 : SafeMath.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/**
 * @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, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        uint256 c = a + b;
        if (c < a) return (false, 0);
        return (true, c);
    }

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

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

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

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

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

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        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, reverting 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) {
        require(b > 0, "SafeMath: division by zero");
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b > 0, "SafeMath: modulo by zero");
        return a % b;
    }

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

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryDiv}.
     *
     * 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);
        return a / b;
    }

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

File 5 of 5 : Address.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.2 <0.8.0;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on 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;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    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");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain`call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
      return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    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");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    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");
        require(isContract(target), "Address: call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.call{ value: value }(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.staticcall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
        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);
            }
        }
    }
}

Settings
{
  "evmVersion": "istanbul",
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "libraries": {
    "PolarRewardPool.sol": {}
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  }
}

Contract ABI

[{"inputs":[{"internalType":"address","name":"_polar","type":"address"},{"internalType":"uint256","name":"_poolStartTime","type":"uint256"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"uint256","name":"pid","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Deposit","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"uint256","name":"pid","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"EmergencyWithdraw","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"RewardPaid","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"uint256","name":"pid","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Withdraw","type":"event"},{"inputs":[{"internalType":"uint256","name":"_allocPoint","type":"uint256"},{"internalType":"contract IERC20","name":"_token","type":"address"},{"internalType":"bool","name":"_withUpdate","type":"bool"},{"internalType":"uint256","name":"_lastRewardTime","type":"uint256"}],"name":"add","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_pid","type":"uint256"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"deposit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_pid","type":"uint256"}],"name":"emergencyWithdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"epochEndTimes","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"epochPolarPerSecond","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"epochTotalRewards","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_fromTime","type":"uint256"},{"internalType":"uint256","name":"_toTime","type":"uint256"}],"name":"getGeneratedReward","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"contract IERC20","name":"_token","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address","name":"to","type":"address"}],"name":"governanceRecoverUnsupported","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"massUpdatePools","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"operator","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_pid","type":"uint256"},{"internalType":"address","name":"_user","type":"address"}],"name":"pendingPOLAR","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"polar","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"poolInfo","outputs":[{"internalType":"contract IERC20","name":"token","type":"address"},{"internalType":"uint256","name":"allocPoint","type":"uint256"},{"internalType":"uint256","name":"lastRewardTime","type":"uint256"},{"internalType":"uint256","name":"accPolarPerShare","type":"uint256"},{"internalType":"bool","name":"isStarted","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"poolStartTime","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_pid","type":"uint256"},{"internalType":"uint256","name":"_allocPoint","type":"uint256"}],"name":"set","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_operator","type":"address"}],"name":"setOperator","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"totalAllocPoint","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_pid","type":"uint256"}],"name":"updatePool","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"address","name":"","type":"address"}],"name":"userInfo","outputs":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"rewardDebt","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_pid","type":"uint256"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

000000000000000000000000f0f3b9eee32b1f490a4b8720cf6f005d4ae9ea8600000000000000000000000000000000000000000000000000000000620fa660

-----Decoded View---------------
Arg [0] : _polar (address): 0xf0f3b9eee32b1f490a4b8720cf6f005d4ae9ea86
Arg [1] : _poolStartTime (uint256): 1645192800

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 000000000000000000000000f0f3b9eee32b1f490a4b8720cf6f005d4ae9ea86
Arg [1] : 00000000000000000000000000000000000000000000000000000000620fa660


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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