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0x64111B1982f4BbB9bf30d8365CC58617Ac503597
 

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Withdraw144419952022-03-23 10:25:39993 days ago1648031139IN
0x64111B19...7Ac503597
0 ETH0.0020618118.08561617
Withdraw144348392022-03-22 7:43:09994 days ago1647934989IN
0x64111B19...7Ac503597
0 ETH0.0038874919.25923783
Withdraw143761282022-03-13 4:03:461003 days ago1647144226IN
0x64111B19...7Ac503597
0 ETH0.0017320917.87896635
Withdraw143736242022-03-12 18:47:441003 days ago1647110864IN
0x64111B19...7Ac503597
0 ETH0.0029896826.22464091
Withdraw143618992022-03-10 22:49:031005 days ago1646952543IN
0x64111B19...7Ac503597
0 ETH0.0030051819.53918384
Deposit143249622022-03-05 5:17:481011 days ago1646457468IN
0x64111B19...7Ac503597
0 ETH0.0051305524.29586283
Withdraw143077952022-03-02 13:10:231014 days ago1646226623IN
0x64111B19...7Ac503597
0 ETH0.0040731742.0387165
Withdraw143043462022-03-02 0:19:271014 days ago1646180367IN
0x64111B19...7Ac503597
0 ETH0.0088981965.10287244
Withdraw142821422022-02-26 14:03:461017 days ago1645884226IN
0x64111B19...7Ac503597
0 ETH0.0067655149.49058343
Withdraw142332992022-02-19 0:31:591025 days ago1645230719IN
0x64111B19...7Ac503597
0 ETH0.0153188199.60020526
Withdraw141767322022-02-10 6:30:251034 days ago1644474625IN
0x64111B19...7Ac503597
0 ETH0.0048013935.12590091
Withdraw141450962022-02-05 9:10:081039 days ago1644052208IN
0x64111B19...7Ac503597
0 ETH0.0090615349.04410677
Withdraw140539582022-01-22 7:03:051053 days ago1642834985IN
0x64111B19...7Ac503597
0 ETH0.02810363139.39467143
Withdraw140539262022-01-22 6:56:071053 days ago1642834567IN
0x64111B19...7Ac503597
0 ETH0.0268045196.11282143
Withdraw140194632022-01-16 23:13:021058 days ago1642374782IN
0x64111B19...7Ac503597
0 ETH0.0109790196.29445708
Withdraw140085732022-01-15 6:55:001060 days ago1642229700IN
0x64111B19...7Ac503597
0 ETH0.01794267157.38770858
Withdraw139804112022-01-10 22:22:531064 days ago1641853373IN
0x64111B19...7Ac503597
0 ETH0.02673379173.81841134
Withdraw139610432022-01-07 22:38:121067 days ago1641595092IN
0x64111B19...7Ac503597
0 ETH0.02137553106.02311281
Manual Epoch Ini...139596532022-01-07 17:31:351067 days ago1641576695IN
0x64111B19...7Ac503597
0 ETH0.01143971148.50605003
Withdraw139486962022-01-06 0:26:131069 days ago1641428773IN
0x64111B19...7Ac503597
0 ETH0.02842322140.82125927
Withdraw138866692021-12-27 10:07:331079 days ago1640599653IN
0x64111B19...7Ac503597
0 ETH0.0043176937.87351211
Withdraw138710982021-12-25 0:27:091081 days ago1640392029IN
0x64111B19...7Ac503597
0 ETH0.0058367760.24804884
Withdraw138605832021-12-23 9:26:171083 days ago1640251577IN
0x64111B19...7Ac503597
0 ETH0.0075172465.93898738
Withdraw138546672021-12-22 11:13:131084 days ago1640171593IN
0x64111B19...7Ac503597
0 ETH0.006243240.59218673
Withdraw138356092021-12-19 12:33:161087 days ago1639917196IN
0x64111B19...7Ac503597
0 ETH0.0044671146.09879722
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Contract Source Code Verified (Exact Match)

Contract Name:
Staking2

Compiler Version
v0.6.12+commit.27d51765

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion
File 1 of 11 : Staking2.sol
// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.6.11;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
import "../lib/BlackholePrevention.sol";

contract Staking2 is
        Ownable,
        ReentrancyGuard,
        BlackholePrevention
{
    using SafeMath for uint256;

    uint128 constant private BASE_MULTIPLIER = uint128(1 * 10 ** 18);

    bool internal _paused;

    // timestamp for the epoch 1
    // everything before that is considered epoch 0 which won't have a reward but allows for the initial stake
    uint256 public immutable epoch1Start;

    // duration of each epoch
    uint256 public immutable epochDuration;

    // holds the current balance of the user for each token
    mapping(address => mapping(address => uint256)) private balances;

    struct Pool {
        uint256 size;
        bool set;
    }

    // for each token, we store the total pool size
    mapping(address => mapping(uint256 => Pool)) private poolSize;

    // a checkpoint of the valid balance of a user for an epoch
    struct Checkpoint {
        uint128 epochId;
        uint128 multiplier;
        uint256 startBalance;
        uint256 newDeposits;
    }

    // balanceCheckpoints[user][token][]
    mapping(address => mapping(address => Checkpoint[])) private balanceCheckpoints;

    mapping(address => uint128) private lastWithdrawEpochId;

    event PausedStateSet(bool isPaused);
    event Deposit(address indexed user, address indexed tokenAddress, uint256 amount);
    event Withdraw(address indexed user, address indexed tokenAddress, uint256 amount);
    event ManualEpochInit(address indexed caller, uint128 indexed epochId, address[] tokens);
    event EmergencyWithdraw(address indexed user, address indexed tokenAddress, uint256 amount);

    constructor (uint256 _epoch1Start, uint256 _epochDuration) public {
        _paused = false;
        epoch1Start = _epoch1Start;
        epochDuration = _epochDuration;
    }

    function isPaused() external view returns (bool) {
        return _paused;
    }

    /*
     * Stores `amount` of `tokenAddress` tokens for the `user` into the vault
     */
    function deposit(address tokenAddress, uint256 amount) public nonReentrant whenNotPaused {
        require(amount > 0, "STK:E-205");

        IERC20 token = IERC20(tokenAddress);

        balances[msg.sender][tokenAddress] = balances[msg.sender][tokenAddress].add(amount);

        token.transferFrom(msg.sender, address(this), amount);

        // epoch logic
        uint128 currentEpoch = getCurrentEpoch();
        uint128 currentMultiplier = currentEpochMultiplier();
        uint256 balance = balances[msg.sender][tokenAddress];

        if (!epochIsInitialized(tokenAddress, currentEpoch)) {
            address[] memory tokens = new address[](1);
            tokens[0] = tokenAddress;
            manualEpochInit(tokens, currentEpoch);
        }

        // update the next epoch pool size
        Pool storage pNextEpoch = poolSize[tokenAddress][currentEpoch + 1];
        pNextEpoch.size = token.balanceOf(address(this));
        pNextEpoch.set = true;

        Checkpoint[] storage checkpoints = balanceCheckpoints[msg.sender][tokenAddress];

        uint256 balanceBefore = getEpochUserBalance(msg.sender, tokenAddress, currentEpoch);

        // if there's no checkpoint yet, it means the user didn't have any activity
        // we want to store checkpoints both for the current epoch and next epoch because
        // if a user does a withdraw, the current epoch can also be modified and
        // we don't want to insert another checkpoint in the middle of the array as that could be expensive
        if (checkpoints.length == 0) {
            checkpoints.push(Checkpoint(currentEpoch, currentMultiplier, 0, amount));

            // next epoch => multiplier is 1, epoch deposits is 0
            checkpoints.push(Checkpoint(currentEpoch + 1, BASE_MULTIPLIER, amount, 0));
        } else {
            uint256 last = checkpoints.length - 1;

            // the last action happened in an older epoch (e.g. a deposit in epoch 3, current epoch is >=5)
            if (checkpoints[last].epochId < currentEpoch) {
                uint128 multiplier = computeNewMultiplier(
                    getCheckpointBalance(checkpoints[last]),
                    BASE_MULTIPLIER,
                    amount,
                    currentMultiplier
                );
                checkpoints.push(Checkpoint(currentEpoch, multiplier, getCheckpointBalance(checkpoints[last]), amount));
                checkpoints.push(Checkpoint(currentEpoch + 1, BASE_MULTIPLIER, balance, 0));
            }
            // the last action happened in the previous epoch
            else if (checkpoints[last].epochId == currentEpoch) {
                checkpoints[last].multiplier = computeNewMultiplier(
                    getCheckpointBalance(checkpoints[last]),
                    checkpoints[last].multiplier,
                    amount,
                    currentMultiplier
                );
                checkpoints[last].newDeposits = checkpoints[last].newDeposits.add(amount);

                checkpoints.push(Checkpoint(currentEpoch + 1, BASE_MULTIPLIER, balance, 0));
            }
            // the last action happened in the current epoch
            else {
                if (last >= 1 && checkpoints[last - 1].epochId == currentEpoch) {
                    checkpoints[last - 1].multiplier = computeNewMultiplier(
                        getCheckpointBalance(checkpoints[last - 1]),
                        checkpoints[last - 1].multiplier,
                        amount,
                        currentMultiplier
                    );
                    checkpoints[last - 1].newDeposits = checkpoints[last - 1].newDeposits.add(amount);
                }

                checkpoints[last].startBalance = balance;
            }
        }

        uint256 balanceAfter = getEpochUserBalance(msg.sender, tokenAddress, currentEpoch);

        poolSize[tokenAddress][currentEpoch].size = poolSize[tokenAddress][currentEpoch].size.add(balanceAfter.sub(balanceBefore));

        emit Deposit(msg.sender, tokenAddress, amount);
    }

    /*
     * Removes the deposit of the user and sends the amount of `tokenAddress` back to the `user`
     */
    function withdraw(address tokenAddress, uint256 amount) public nonReentrant {
        require(balances[msg.sender][tokenAddress] >= amount, "STK:E-432");

        balances[msg.sender][tokenAddress] = balances[msg.sender][tokenAddress].sub(amount);

        IERC20 token = IERC20(tokenAddress);
        token.transfer(msg.sender, amount);

        // epoch logic
        uint128 currentEpoch = getCurrentEpoch();

        lastWithdrawEpochId[tokenAddress] = currentEpoch;

        if (!epochIsInitialized(tokenAddress, currentEpoch)) {
            address[] memory tokens = new address[](1);
            tokens[0] = tokenAddress;
            manualEpochInit(tokens, currentEpoch);
        }

        // update the pool size of the next epoch to its current balance
        Pool storage pNextEpoch = poolSize[tokenAddress][currentEpoch + 1];
        pNextEpoch.size = token.balanceOf(address(this));
        pNextEpoch.set = true;

        Checkpoint[] storage checkpoints = balanceCheckpoints[msg.sender][tokenAddress];
        uint256 last = checkpoints.length - 1;

        // note: it's impossible to have a withdraw and no checkpoints because the checkpoints[last] will be out of bound and revert

        // there was a deposit in an older epoch (more than 1 behind [eg: previous 0, now 5]) but no other action since then
        if (checkpoints[last].epochId < currentEpoch) {
            checkpoints.push(Checkpoint(currentEpoch, BASE_MULTIPLIER, balances[msg.sender][tokenAddress], 0));

            poolSize[tokenAddress][currentEpoch].size = poolSize[tokenAddress][currentEpoch].size.sub(amount);
        }
        // there was a deposit in the `epochId - 1` epoch => we have a checkpoint for the current epoch
        else if (checkpoints[last].epochId == currentEpoch) {
            checkpoints[last].startBalance = balances[msg.sender][tokenAddress];
            checkpoints[last].newDeposits = 0;
            checkpoints[last].multiplier = BASE_MULTIPLIER;

            poolSize[tokenAddress][currentEpoch].size = poolSize[tokenAddress][currentEpoch].size.sub(amount);
        }
        // there was a deposit in the current epoch
        else {
            Checkpoint storage currentEpochCheckpoint = checkpoints[last - 1];

            uint256 balanceBefore = getCheckpointEffectiveBalance(currentEpochCheckpoint);

            // in case of withdraw, we have 2 branches:
            // 1. the user withdraws less than he added in the current epoch
            // 2. the user withdraws more than he added in the current epoch (including 0)
            if (amount < currentEpochCheckpoint.newDeposits) {
                uint128 avgDepositMultiplier = uint128(
                    balanceBefore.sub(currentEpochCheckpoint.startBalance).mul(BASE_MULTIPLIER).div(currentEpochCheckpoint.newDeposits)
                );

                currentEpochCheckpoint.newDeposits = currentEpochCheckpoint.newDeposits.sub(amount);

                currentEpochCheckpoint.multiplier = computeNewMultiplier(
                    currentEpochCheckpoint.startBalance,
                    BASE_MULTIPLIER,
                    currentEpochCheckpoint.newDeposits,
                    avgDepositMultiplier
                );
            } else {
                currentEpochCheckpoint.startBalance = currentEpochCheckpoint.startBalance.sub(
                    amount.sub(currentEpochCheckpoint.newDeposits)
                );
                currentEpochCheckpoint.newDeposits = 0;
                currentEpochCheckpoint.multiplier = BASE_MULTIPLIER;
            }

            uint256 balanceAfter = getCheckpointEffectiveBalance(currentEpochCheckpoint);

            poolSize[tokenAddress][currentEpoch].size = poolSize[tokenAddress][currentEpoch].size.sub(balanceBefore.sub(balanceAfter));

            checkpoints[last].startBalance = balances[msg.sender][tokenAddress];
        }

        emit Withdraw(msg.sender, tokenAddress, amount);
    }

    /*
     * manualEpochInit can be used by anyone to initialize an epoch based on the previous one
     * This is only applicable if there was no action (deposit/withdraw) in the current epoch.
     * Any deposit and withdraw will automatically initialize the current and next epoch.
     */
    function manualEpochInit(address[] memory tokens, uint128 epochId) public whenNotPaused {
        require(epochId <= getCurrentEpoch(), "STK:E-306");


        for (uint i = 0; i < tokens.length; i++) {
            Pool storage p = poolSize[tokens[i]][epochId];
            if (epochId == 0) {
                p.size = uint256(0);
                p.set = true;
            } else {
                require(!epochIsInitialized(tokens[i], epochId), "STK:E-002");
                require(epochIsInitialized(tokens[i], epochId - 1), "STK:E-305");
                p.size = poolSize[tokens[i]][epochId - 1].size;
                p.set = true;
            }
        }

        emit ManualEpochInit(msg.sender, epochId, tokens);
    }

    function emergencyWithdraw(address tokenAddress) public {
        require((getCurrentEpoch() - lastWithdrawEpochId[tokenAddress]) >= 10, "STK:E-304");

        uint256 totalUserBalance = balances[msg.sender][tokenAddress];
        require(totalUserBalance > 0, "STK:E-205");

        balances[msg.sender][tokenAddress] = 0;

        IERC20 token = IERC20(tokenAddress);
        token.transfer(msg.sender, totalUserBalance);

        emit EmergencyWithdraw(msg.sender, tokenAddress, totalUserBalance);
    }

    /*
     * Returns the valid balance of a user that was taken into consideration in the total pool size for the epoch
     * A deposit will only change the next epoch balance.
     * A withdraw will decrease the current epoch (and subsequent) balance.
     */
    function getEpochUserBalance(address user, address token, uint128 epochId) public view returns (uint256) {
        Checkpoint[] storage checkpoints = balanceCheckpoints[user][token];

        // if there are no checkpoints, it means the user never deposited any tokens, so the balance is 0
        if (checkpoints.length == 0 || epochId < checkpoints[0].epochId) {
            return 0;
        }

        uint min = 0;
        uint max = checkpoints.length - 1;

        // shortcut for blocks newer than the latest checkpoint == current balance
        if (epochId >= checkpoints[max].epochId) {
            return getCheckpointEffectiveBalance(checkpoints[max]);
        }

        // binary search of the value in the array
        while (max > min) {
            uint mid = (max + min + 1) / 2;
            if (checkpoints[mid].epochId <= epochId) {
                min = mid;
            } else {
                max = mid - 1;
            }
        }

        return getCheckpointEffectiveBalance(checkpoints[min]);
    }

    /*
     * Returns the amount of `token` that the `user` has currently staked
     */
    function balanceOf(address user, address token) public view returns (uint256) {
        return balances[user][token];
    }

    /*
     * Returns the id of the current epoch derived from block.timestamp
     */
    function getCurrentEpoch() public view returns (uint128) {
        if (block.timestamp < epoch1Start) {
            return 0;
        }

        return uint128((block.timestamp - epoch1Start) / epochDuration + 1);
    }

    /*
     * Returns the total amount of `tokenAddress` that was locked from beginning to end of epoch identified by `epochId`
     */
    function getEpochPoolSize(address tokenAddress, uint128 epochId) public view returns (uint256) {
        // Premises:
        // 1. it's impossible to have gaps of uninitialized epochs
        // - any deposit or withdraw initialize the current epoch which requires the previous one to be initialized
        if (epochIsInitialized(tokenAddress, epochId)) {
            return poolSize[tokenAddress][epochId].size;
        }

        // epochId not initialized and epoch 0 not initialized => there was never any action on this pool
        if (!epochIsInitialized(tokenAddress, 0)) {
            return 0;
        }

        // epoch 0 is initialized => there was an action at some point but none that initialized the epochId
        // which means the current pool size is equal to the current balance of token held by the staking contract
        IERC20 token = IERC20(tokenAddress);
        return token.balanceOf(address(this));
    }

    /*
     * Returns the percentage of time left in the current epoch
     */
    function currentEpochMultiplier() public view returns (uint128) {
        uint128 currentEpoch = getCurrentEpoch();
        uint256 currentEpochEnd = epoch1Start + currentEpoch * epochDuration;
        uint256 timeLeft = currentEpochEnd - block.timestamp;
        uint128 multiplier = uint128(timeLeft * BASE_MULTIPLIER / epochDuration);

        return multiplier;
    }

    function computeNewMultiplier(uint256 prevBalance, uint128 prevMultiplier, uint256 amount, uint128 currentMultiplier) public pure returns (uint128) {
        uint256 prevAmount = prevBalance.mul(prevMultiplier).div(BASE_MULTIPLIER);
        uint256 addAmount = amount.mul(currentMultiplier).div(BASE_MULTIPLIER);
        uint128 newMultiplier = uint128(prevAmount.add(addAmount).mul(BASE_MULTIPLIER).div(prevBalance.add(amount)));

        return newMultiplier;
    }

    /*
     * Checks if an epoch is initialized, meaning we have a pool size set for it
     */
    function epochIsInitialized(address token, uint128 epochId) public view returns (bool) {
        return poolSize[token][epochId].set;
    }

    function getCheckpointBalance(Checkpoint memory c) internal pure returns (uint256) {
        return c.startBalance.add(c.newDeposits);
    }

    function getCheckpointEffectiveBalance(Checkpoint memory c) internal pure returns (uint256) {
        return getCheckpointBalance(c).mul(c.multiplier).div(BASE_MULTIPLIER);
    }


    /***********************************|
    |          Only Admin/DAO           |
    |__________________________________*/

    function setPausedState(bool paused) external onlyOwner {
        _paused = paused;
        emit PausedStateSet(paused);
    }

    // Note: This contract should never hold ETH, if any is accidentally sent in then the DAO can return it
    function withdrawEther(address payable receiver, uint256 amount) external virtual onlyOwner {
        _withdrawEther(receiver, amount);
    }

    modifier whenNotPaused() {
        require(_paused != true, "STK:E-101");
         _;
    }

}

File 2 of 11 : Ownable.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

import "../GSN/Context.sol";
/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor () internal {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(_owner == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}

File 3 of 11 : IERC20.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

/**
 * @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 4 of 11 : SafeMath.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

/**
 * @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, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;

        return c;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) {
            return 0;
        }

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

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

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

File 5 of 11 : ReentrancyGuard.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied 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.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    constructor () internal {
        _status = _NOT_ENTERED;
    }

    /**
     * @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() {
        // On the first call to nonReentrant, _notEntered will be true
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;

        _;

        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }
}

File 6 of 11 : BlackholePrevention.sol
// SPDX-License-Identifier: MIT

// BlackholePrevention.sol -- Part of the Charged Particles Protocol
// Copyright (c) 2021 Firma Lux, Inc. <https://charged.fi>
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.

pragma solidity >=0.6.0;

import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";

/**
 * @notice Prevents ETH or Tokens from getting stuck in a contract by allowing
 *  the Owner/DAO to pull them out on behalf of a user
 * This is only meant to contracts that are not expected to hold tokens, but do handle transferring them.
 */
contract BlackholePrevention {
  using Address for address payable;
  using SafeERC20 for IERC20;

  event WithdrawStuckEther(address indexed receiver, uint256 amount);
  event WithdrawStuckERC20(address indexed receiver, address indexed tokenAddress, uint256 amount);
  event WithdrawStuckERC721(address indexed receiver, address indexed tokenAddress, uint256 indexed tokenId);

  function _withdrawEther(address payable receiver, uint256 amount) internal virtual {
    require(receiver != address(0x0), "BHP:E-403");
    if (address(this).balance >= amount) {
      receiver.sendValue(amount);
      emit WithdrawStuckEther(receiver, amount);
    }
  }

  function _withdrawERC20(address payable receiver, address tokenAddress, uint256 amount) internal virtual {
    require(receiver != address(0x0), "BHP:E-403");
    if (IERC20(tokenAddress).balanceOf(address(this)) >= amount) {
      IERC20(tokenAddress).safeTransfer(receiver, amount);
      emit WithdrawStuckERC20(receiver, tokenAddress, amount);
    }
  }

  function _withdrawERC721(address payable receiver, address tokenAddress, uint256 tokenId) internal virtual {
    require(receiver != address(0x0), "BHP:E-403");
    if (IERC721(tokenAddress).ownerOf(tokenId) == address(this)) {
      IERC721(tokenAddress).transferFrom(address(this), receiver, tokenId);
      emit WithdrawStuckERC721(receiver, tokenAddress, tokenId);
    }
  }
}

File 7 of 11 : Context.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

/*
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with GSN meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address payable) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}

File 8 of 11 : Address.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.6.2;

/**
 * @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) {
        // According to EIP-1052, 0x0 is the value returned for not-yet created accounts
        // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
        // for accounts without code, i.e. `keccak256('')`
        bytes32 codehash;
        bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
        // solhint-disable-next-line no-inline-assembly
        assembly { codehash := extcodehash(account) }
        return (codehash != accountHash && codehash != 0x0);
    }

    /**
     * @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");
        return _functionCallWithValue(target, data, value, errorMessage);
    }

    function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
        require(isContract(target), "Address: call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

File 9 of 11 : SafeERC20.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

import "./IERC20.sol";
import "../../math/SafeMath.sol";
import "../../utils/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 10 of 11 : IERC721.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.6.2;

import "../../introspection/IERC165.sol";

/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721 is IERC165 {
    /**
     * @dev Emitted when `tokenId` token is transfered from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
     */
    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
     */
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    /**
     * @dev Returns the number of tokens in ``owner``'s account.
     */
    function balanceOf(address owner) external view returns (uint256 balance);

    /**
     * @dev Returns the owner of the `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function ownerOf(uint256 tokenId) external view returns (address owner);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(address from, address to, uint256 tokenId) external;

    /**
     * @dev Transfers `tokenId` token from `from` to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 tokenId) external;

    /**
     * @dev Gives permission to `to` to transfer `tokenId` token to another account.
     * The approval is cleared when the token is transferred.
     *
     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.
     *
     * Requirements:
     *
     * - The caller must own the token or be an approved operator.
     * - `tokenId` must exist.
     *
     * Emits an {Approval} event.
     */
    function approve(address to, uint256 tokenId) external;

    /**
     * @dev Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) external view returns (address operator);

    /**
     * @dev Approve or remove `operator` as an operator for the caller.
     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
     *
     * Requirements:
     *
     * - The `operator` cannot be the caller.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool _approved) external;

    /**
     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
     *
     * See {setApprovalForAll}
     */
    function isApprovedForAll(address owner, address operator) external view returns (bool);

    /**
      * @dev Safely transfers `tokenId` token from `from` to `to`.
      *
      * Requirements:
      *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
      * - `tokenId` token must exist and be owned by `from`.
      * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
      * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
      *
      * Emits a {Transfer} event.
      */
    function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external;
}

File 11 of 11 : IERC165.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  },
  "metadata": {
    "useLiteralContent": true
  },
  "libraries": {}
}

Contract Security Audit

Contract ABI

[{"inputs":[{"internalType":"uint256","name":"_epoch1Start","type":"uint256"},{"internalType":"uint256","name":"_epochDuration","type":"uint256"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"address","name":"tokenAddress","type":"address"},{"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":"address","name":"tokenAddress","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"EmergencyWithdraw","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"caller","type":"address"},{"indexed":true,"internalType":"uint128","name":"epochId","type":"uint128"},{"indexed":false,"internalType":"address[]","name":"tokens","type":"address[]"}],"name":"ManualEpochInit","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bool","name":"isPaused","type":"bool"}],"name":"PausedStateSet","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"address","name":"tokenAddress","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Withdraw","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"receiver","type":"address"},{"indexed":true,"internalType":"address","name":"tokenAddress","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"WithdrawStuckERC20","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"receiver","type":"address"},{"indexed":true,"internalType":"address","name":"tokenAddress","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"WithdrawStuckERC721","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"receiver","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"WithdrawStuckEther","type":"event"},{"inputs":[{"internalType":"address","name":"user","type":"address"},{"internalType":"address","name":"token","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"prevBalance","type":"uint256"},{"internalType":"uint128","name":"prevMultiplier","type":"uint128"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint128","name":"currentMultiplier","type":"uint128"}],"name":"computeNewMultiplier","outputs":[{"internalType":"uint128","name":"","type":"uint128"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"currentEpochMultiplier","outputs":[{"internalType":"uint128","name":"","type":"uint128"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"tokenAddress","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"deposit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"tokenAddress","type":"address"}],"name":"emergencyWithdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"epoch1Start","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"epochDuration","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint128","name":"epochId","type":"uint128"}],"name":"epochIsInitialized","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getCurrentEpoch","outputs":[{"internalType":"uint128","name":"","type":"uint128"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"tokenAddress","type":"address"},{"internalType":"uint128","name":"epochId","type":"uint128"}],"name":"getEpochPoolSize","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"user","type":"address"},{"internalType":"address","name":"token","type":"address"},{"internalType":"uint128","name":"epochId","type":"uint128"}],"name":"getEpochUserBalance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"isPaused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address[]","name":"tokens","type":"address[]"},{"internalType":"uint128","name":"epochId","type":"uint128"}],"name":"manualEpochInit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bool","name":"paused","type":"bool"}],"name":"setPausedState","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"tokenAddress","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address payable","name":"receiver","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"withdrawEther","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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

00000000000000000000000000000000000000000000000000000000612416640000000000000000000000000000000000000000000000000000000000093a80

-----Decoded View---------------
Arg [0] : _epoch1Start (uint256): 1629754980
Arg [1] : _epochDuration (uint256): 604800

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000061241664
Arg [1] : 0000000000000000000000000000000000000000000000000000000000093a80


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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.