{
  "language": "Solidity",
  "sources": {
    "contracts/staking/MasterChef.sol": {
      "content": "// SPDX-License-Identifier: MIT\npragma solidity >=0.8.0;\n\nimport \"../tokens/HelixToken.sol\";\nimport \"../interfaces/IReferralRegister.sol\";\nimport \"../interfaces/IFeeMinter.sol\";\nimport \"../timelock/OwnableTimelockUpgradeable.sol\";\n\nimport \"@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol\";\nimport \"@openzeppelin/contracts-upgradeable/security/PausableUpgradeable.sol\";\nimport \"@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol\";\nimport \"@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol\";\nimport \"@uniswap/lib/contracts/libraries/TransferHelper.sol\";\n\ncontract MasterChef is Initializable, PausableUpgradeable, OwnableUpgradeable, OwnableTimelockUpgradeable {\n    // Info of each user.\n    struct UserInfo {\n        uint256 amount; // How many LP tokens the user has provided.\n        uint256 rewardDebt; // Reward debt. See explanation below.\n        //\n        // We do some fancy math here. Basically, any point in time, the amount of HelixTokens\n        // entitled to a user but is pending to be distributed is:\n        //\n        //   pending reward = (user.amount * pool.accHelixTokenPerShare) - user.rewardDebt\n        //\n        // Whenever a user deposits or withdraws LP tokens to a pool. Here's what happens:\n        //   1. The pool's `accHelixTokenPerShare` (and `lastRewardBlock`) gets updated.\n        //   2. User receives the pending reward sent to his/her address.\n        //   3. User's `amount` gets updated.\n        //   4. User's `rewardDebt` gets updated.\n    }\n    // Info of each pool.\n    struct PoolInfo {\n        IERC20 lpToken; // Address of LP token contract.\n        uint256 allocPoint; // How many allocation points assigned to this pool. HelixTokens to distribute per block.\n        uint256 lastRewardBlock; // Last block number that HelixTokens distribution occurs.\n        uint256 accHelixTokenPerShare; // Accumulated HelixTokens per share, times 1e12. See below.\n    }\n\n    // Used by bucket deposits and withdrawals to enable a caller to deposit lpTokens\n    // and accrue yield into distinct, uniquely indentified \"buckets\" such that each\n    // bucket can be interacted with individually and without affecting deposits and \n    // yields in other buckets\n    struct BucketInfo {\n        uint256 amount;             // How many LP tokens have been deposited into the bucket\n        uint256 rewardDebt;         // Reward debt. See explanation in UserInfo\n        uint256 yield;              // Accrued but unwithdrawn yield\n    }\n     \n    // The HelixToken TOKEN!\n    HelixToken public helixToken;\n\n    // Called to get helix token to mint per block rates\n    IFeeMinter public feeMinter;\n\n    //Pools, Farms, Dev, Refs percent decimals\n    uint256 public percentDec;\n\n    //Pools and Farms percent from token per block\n    uint256 public stakingPercent;\n\n    //Developers percent from token per block\n    uint256 public devPercent;\n\n    // Dev address.\n    address public devaddr;\n\n    // Last block then develeper withdraw dev and ref fee\n    uint256 public lastBlockDevWithdraw;\n\n    // Bonus muliplier for early HelixToken makers.\n    uint256 public BONUS_MULTIPLIER;\n\n    // Referral Register contract\n    IReferralRegister public refRegister;\n\n    // Info of each pool.\n    PoolInfo[] public poolInfo;\n\n    // Total allocation poitns. Must be the sum of all allocation points in all pools.\n    uint256 public totalAllocPoint;\n\n    // The block number when HelixToken mining starts.\n    uint256 public startBlock;\n\n    // Deposited amount HelixToken in MasterChef\n    uint256 public depositedHelix;\n\n    // Maps poolId => depositorAddress => bucketId => BucketInfo\n    // where the depositor is depositing funds into a uniquely identified deposit \"bucket\"\n    // and where those funds are only accessible by the depositor\n    // Used by the bucket deposit and withdraw functions\n    mapping(uint256 => mapping(address => mapping(uint256 => BucketInfo))) public bucketInfo;\n\n    // Info of each user that stakes LP tokens.\n    mapping(uint256 => mapping(address => UserInfo)) public userInfo;\n\n    // Maps a lpToken address to a poolId\n    mapping(address => uint256) public poolIds;\n\n    event Deposit(\n        address indexed user, \n        uint256 indexed pid, \n        uint256 amount\n    );\n\n    event Withdraw(\n        address indexed user, \n        uint256 indexed pid, \n        uint256 amount\n    );\n\n    event EmergencyWithdraw(\n        address indexed user,\n        uint256 indexed pid,\n        uint256 amount\n    );\n\n    // Emitted when the owner adds a new LP Token to the pool\n    event Added(uint256 indexed poolId, address indexed lpToken, bool withUpdate);\n\n    // Emitted when the owner sets the pool alloc point\n    event AllocPointSet(uint256 indexed poolId, uint256 allocPoint, bool withUpdate);\n\n    // Emitted when the owner sets a new referral register contract\n    event ReferralRegisterSet(address referralRegister);\n\n    // Emitted when the pool is updated\n    event PoolUpdated(uint256 indexed poolId);\n\n    // Emitted when the owner sets a new dev address\n    event DevAddressSet(address devAddress);\n\n    // Emitted when the owner updates the helix per block rate\n    event HelixPerBlockUpdated(uint256 rate);\n\n    // Emitted when the feeMinter is set\n    event SetFeeMinter(address indexed setter, address indexed feeMinter);\n    \n    // Emitted when a depositor deposits amount of lpToken into bucketId and stakes to poolId\n    event BucketDeposit(\n        address indexed depositor, \n        uint256 indexed bucketId,\n        uint256 poolId, \n        uint256 amount\n    );\n\n    event BucketWithdraw(\n        address indexed depositor, \n        uint256 indexed bucketId,\n        uint256 poolId, \n        uint256 amount\n    );\n\n    event BucketWithdrawAmountTo(\n        address indexed depositor, \n        address indexed recipient,\n        uint256 indexed bucketId,\n        uint256 poolId, \n        uint256 amount\n    );\n\n    event BucketWithdrawYieldTo(\n        address indexed depositor, \n        address indexed recipient,\n        uint256 indexed bucketId,\n        uint256 poolId, \n        uint256 yield \n    );\n\n    event UpdateBucket(\n        address indexed depositor,\n        uint256 indexed bucketId,\n        uint256 indexed poolId\n    );\n\n    modifier isNotHelixPoolId(uint256 poolId) {\n        require(poolId != 0, \"MasterChef: invalid pool id\");\n        _;\n    }\n\n    modifier isNotZeroAddress(address _address) {\n        require(_address != address(0), \"MasterChef: zero address\");\n        _;\n    }\n\n    function initialize(\n        HelixToken _HelixToken,\n        address _devaddr,\n        address _feeMinter,\n        uint256 _startBlock,\n        uint256 _stakingPercent,\n        uint256 _devPercent,\n        IReferralRegister _referralRegister\n    ) external initializer {\n        __Ownable_init();\n        __OwnableTimelock_init();\n        helixToken = _HelixToken;\n        devaddr = _devaddr;\n        feeMinter = IFeeMinter(_feeMinter);\n        startBlock = _startBlock != 0 ? _startBlock : block.number;\n        stakingPercent = _stakingPercent;\n        devPercent = _devPercent;\n        lastBlockDevWithdraw = _startBlock != 0 ? _startBlock : block.number;\n        refRegister = _referralRegister;\n        \n        // staking pool\n        poolInfo.push(PoolInfo({\n            lpToken: _HelixToken,\n            allocPoint: 1000,\n            lastRewardBlock: startBlock,\n            accHelixTokenPerShare: 0\n        }));\n        poolIds[address(_HelixToken)] = 0;\n\n        totalAllocPoint = 1000;\n        percentDec = 1000000;\n        BONUS_MULTIPLIER = 1;\n    }\n\n    function updateMultiplier(uint256 multiplierNumber) external onlyTimelock {\n        BONUS_MULTIPLIER = multiplierNumber;\n    }\n\n    function poolLength() external view returns (uint256) {\n        return poolInfo.length;\n    }\n\n    // Return the lpToken address associated with poolId _pid\n    function getLpToken(uint256 _pid) external view returns(address) {\n        return address(poolInfo[_pid].lpToken);\n    }\n    \n    // Return the poolId associated with the lpToken address\n    function getPoolId(address _lpToken) external view returns (uint256) {\n        uint256 poolId = poolIds[_lpToken];\n        if (poolId == 0) {\n            require(_lpToken == address(helixToken), \"MasterChef: token not added\");\n        }\n        return poolId;\n    }\n\n    function withdrawDevAndRefFee() external {\n        require(lastBlockDevWithdraw < block.number, \"MasterChef: wait for new block\");\n        uint256 blockDelta = getMultiplier(lastBlockDevWithdraw, block.number);\n        uint256 helixTokenReward = blockDelta * _getDevToMintPerBlock();\n        lastBlockDevWithdraw = block.number;\n        helixToken.mint(devaddr, helixTokenReward);\n    }\n\n    // Add a new lp to the pool. Can only be called by the owner.\n    // XXX DO NOT add the same LP token more than once. Rewards will be messed up if you do.\n    function add(uint256 _allocPoint, IERC20 _lpToken, bool _withUpdate) external onlyTimelock {\n        if (_withUpdate) {\n            massUpdatePools();\n        }\n        uint256 lastRewardBlock = block.number > startBlock ? block.number : startBlock;\n        totalAllocPoint = totalAllocPoint + (_allocPoint);\n        poolInfo.push(\n            PoolInfo({\n                lpToken: _lpToken,\n                allocPoint: _allocPoint,\n                lastRewardBlock: lastRewardBlock,\n                accHelixTokenPerShare: 0\n            })\n        );\n\n        uint256 poolId = poolInfo.length - 1;\n        poolIds[address(_lpToken)] = poolId;\n\n        emit Added(poolId, address(_lpToken), _withUpdate);\n    }\n\n    // Update the given pool's HelixToken allocation point. Can only be called by the owner.\n    function set( uint256 _pid, uint256 _allocPoint, bool _withUpdate) external onlyTimelock {\n        if (_withUpdate) {\n            massUpdatePools();\n        }\n        totalAllocPoint = totalAllocPoint - (poolInfo[_pid].allocPoint) + (_allocPoint);\n        poolInfo[_pid].allocPoint = _allocPoint;\n\n        emit AllocPointSet(_pid, _allocPoint, _withUpdate);\n    }\n\n    /// Called by the owner to pause the contract\n    function pause() external onlyOwner {\n        _pause();\n    }\n\n    /// Called by the owner to unpause the contract\n    function unpause() external onlyOwner {\n        _unpause();\n    }\n\n    // Return reward multiplier over the given _from to _to block.\n    function getMultiplier(uint256 _from, uint256 _to) public view returns (uint256) {\n         return (_to - _from) * (BONUS_MULTIPLIER);\n    }\n\n    // Set ReferralRegister address\n    function setReferralRegister(address _address) external onlyOwner {\n        refRegister = IReferralRegister(_address);\n        emit ReferralRegisterSet(_address);\n    }\n\n    // View function to see pending HelixTokens on frontend.\n    function pendingHelixToken(uint256 _pid, address _user) external view returns (uint256){\n        PoolInfo memory pool = poolInfo[_pid];\n        UserInfo memory user = userInfo[_pid][_user];\n        uint256 accHelixTokenPerShare = pool.accHelixTokenPerShare;\n        uint256 lpSupply = pool.lpToken.balanceOf(address(this));\n        if (_pid == 0){\n            lpSupply = depositedHelix;\n        }\n\n        if (block.number > pool.lastRewardBlock && lpSupply != 0) {\n            uint256 blockDelta = getMultiplier(pool.lastRewardBlock, block.number);\n            uint256 toMintPerBlock = _getStakeToMintPerBlock();\n            uint256 helixTokenReward = blockDelta * toMintPerBlock * (pool.allocPoint) / (totalAllocPoint);\n            accHelixTokenPerShare = accHelixTokenPerShare + (helixTokenReward * (1e12) / (lpSupply));\n        }\n\n        uint256 pending = user.amount * (accHelixTokenPerShare) / (1e12) - (user.rewardDebt);\n        return pending;\n    }\n\n    // Update reward vairables for all pools. Be careful of gas spending!\n    function massUpdatePools() public {\n        uint256 length = poolInfo.length;\n        for (uint256 pid = 0; pid < length; ++pid) {\n            updatePool(pid);\n        }\n    }\n\n    // Update reward variables of the given pool to be up-to-date.\n    function updatePool(uint256 _pid) public {\n        PoolInfo storage pool = poolInfo[_pid];\n        if (block.number <= pool.lastRewardBlock) {\n            return;\n        }\n        uint256 lpSupply = pool.lpToken.balanceOf(address(this));\n        if (_pid == 0){\n            lpSupply = depositedHelix;\n        }\n        if (lpSupply <= 0) {\n            pool.lastRewardBlock = block.number;\n            return;\n        }\n        uint256 blockDelta = getMultiplier(pool.lastRewardBlock, block.number);\n        uint256 toMintPerBlock = _getStakeToMintPerBlock();\n        uint256 helixTokenReward = blockDelta * toMintPerBlock * pool.allocPoint / (totalAllocPoint);\n        pool.accHelixTokenPerShare = pool.accHelixTokenPerShare + (helixTokenReward * (1e12) / (lpSupply));\n        pool.lastRewardBlock = block.number;\n        helixToken.mint(address(this), helixTokenReward);\n\n        emit PoolUpdated(_pid);\n    }\n\n    // Deposit LP tokens to MasterChef for HelixToken allocation.\n    function deposit(uint256 _pid, uint256 _amount) external whenNotPaused isNotHelixPoolId(_pid) {\n        PoolInfo storage pool = poolInfo[_pid];\n        UserInfo storage user = userInfo[_pid][msg.sender];\n\n        updatePool(_pid);\n\n        uint256 pending = user.amount * (pool.accHelixTokenPerShare) / (1e12) - (user.rewardDebt);\n        user.amount = user.amount + (_amount);\n        user.rewardDebt = user.amount * (pool.accHelixTokenPerShare) / (1e12);\n\n        if (pending > 0) {\n            refRegister.rewardStake(msg.sender, pending);\n            safeHelixTokenTransfer(msg.sender, pending);\n        }\n        if (_amount > 0) {\n            TransferHelper.safeTransferFrom(address(pool.lpToken), address(msg.sender), address(this), _amount);\n        }\n\n        emit Deposit(msg.sender, _pid, _amount);\n    }\n\n    // Withdraw LP tokens from MasterChef.\n    function withdraw(uint256 _pid, uint256 _amount) external whenNotPaused isNotHelixPoolId(_pid) {\n        PoolInfo storage pool = poolInfo[_pid];\n        UserInfo storage user = userInfo[_pid][msg.sender];\n\n        require(user.amount >= _amount, \"MasterChef: insufficient balance\");\n\n        updatePool(_pid);\n\n        uint256 pending = user.amount * (pool.accHelixTokenPerShare) / (1e12) - (user.rewardDebt);\n        user.amount -= _amount;\n        user.rewardDebt = user.amount * (pool.accHelixTokenPerShare) / (1e12);\n\n        if (pending > 0) {\n            refRegister.rewardStake(msg.sender, pending);\n            safeHelixTokenTransfer(msg.sender, pending);\n        }\n        if (_amount > 0) {\n            TransferHelper.safeTransfer(address(pool.lpToken), address(msg.sender), _amount);\n        }\n\n        emit Withdraw(msg.sender, _pid, _amount);\n    }\n\n    // Deposit _amount of lpToken into _bucketId and accrue yield by staking _amount to _poolId\n    function bucketDeposit(\n        uint256 _bucketId,          // Unique bucket to deposit _amount into\n        uint256 _poolId,            // Pool to deposit _amount into\n        uint256 _amount             // Amount of lpToken being deposited\n    ) \n        external \n        whenNotPaused\n        isNotHelixPoolId(_poolId)\n    {\n        PoolInfo storage pool = poolInfo[_poolId];\n        BucketInfo storage bucket = bucketInfo[_poolId][msg.sender][_bucketId];\n\n        updatePool(_poolId);\n\n        // If the bucket already has already accrued rewards, \n        // increment the yield before resetting the rewardDebt\n        if (bucket.amount > 0) {\n            bucket.yield += bucket.amount * (pool.accHelixTokenPerShare) / (1e12) - (bucket.rewardDebt);\n        }\n    \n        // Update the bucket amount and reset the rewardDebt\n        bucket.amount += _amount;\n        bucket.rewardDebt = bucket.amount * (pool.accHelixTokenPerShare) / (1e12);\n\n        // Transfer amount of lpToken from caller to chef\n        require(\n            _amount <= pool.lpToken.allowance(msg.sender, address(this)), \n            \"MasterChef: insufficient allowance\"\n        );\n        TransferHelper.safeTransferFrom(address(pool.lpToken), msg.sender, address(this), _amount);\n\n        emit BucketDeposit(msg.sender, _bucketId, _poolId, _amount);\n    }\n\n    // Withdraw _amount of lpToken and all accrued yield from _bucketId and _poolId\n    function bucketWithdraw(uint256 _bucketId, uint256 _poolId, uint256 _amount) external whenNotPaused isNotHelixPoolId(_poolId) {\n        PoolInfo storage pool = poolInfo[_poolId];\n        BucketInfo storage bucket = bucketInfo[_poolId][msg.sender][_bucketId];\n\n        require(_amount <= bucket.amount, \"MasterChef: insufficient balance\");\n\n        updatePool(_poolId);\n    \n        // Calculate the total yield to withdraw\n        uint256 pending = bucket.amount * (pool.accHelixTokenPerShare) / (1e12) - (bucket.rewardDebt);\n        uint256 yield = bucket.yield + pending;\n\n        // Update the bucket state\n        bucket.amount -= _amount;\n        bucket.rewardDebt = bucket.amount * (pool.accHelixTokenPerShare) / (1e12);\n        bucket.yield = 0;\n\n        // Withdraw the yield and lpToken\n        refRegister.rewardStake(msg.sender, yield);\n        safeHelixTokenTransfer(msg.sender, yield);\n        TransferHelper.safeTransfer(address(pool.lpToken), address(msg.sender), _amount);\n\n        emit BucketWithdraw(msg.sender, _bucketId, _poolId, _amount);\n    }\n\n    // Withdraw _amount of lpToken from _bucketId and from _poolId\n    // and send the withdrawn _amount to _recipient\n    function bucketWithdrawAmountTo(\n        address _recipient,\n        uint256 _bucketId,\n        uint256 _poolId, \n        uint256 _amount\n    ) \n        external \n        whenNotPaused\n        isNotZeroAddress(_recipient)\n        isNotHelixPoolId(_poolId)\n    {\n        PoolInfo storage pool = poolInfo[_poolId];\n\n        BucketInfo storage bucket = bucketInfo[_poolId][msg.sender][_bucketId];\n        require(\n            _amount <= bucket.amount, \n            \"MasterChef: insufficient balance\"\n        );\n\n        updatePool(_poolId);\n\n        // Update the bucket state\n        bucket.yield += bucket.amount * (pool.accHelixTokenPerShare) / (1e12) - (bucket.rewardDebt);\n        bucket.amount -= _amount;\n        bucket.rewardDebt = bucket.amount * (pool.accHelixTokenPerShare) / (1e12);\n\n        // Transfer only lpToken to the recipient\n        TransferHelper.safeTransfer(address(pool.lpToken), _recipient, _amount);\n\n        emit BucketWithdrawAmountTo(msg.sender, _recipient, _bucketId, _poolId, _amount);\n    }\n\n    // Withdraw total yield in HelixToken from _bucketId and _poolId and send to _recipient\n    function bucketWithdrawYieldTo(\n        address _recipient,\n        uint256 _bucketId,\n        uint256 _poolId,\n        uint256 _yield\n    ) \n        external \n        whenNotPaused\n        isNotZeroAddress(_recipient)\n        isNotHelixPoolId(_poolId)\n    {\n        PoolInfo storage pool = poolInfo[_poolId];\n        BucketInfo storage bucket = bucketInfo[_poolId][msg.sender][_bucketId];\n\n        updatePool(_poolId);\n\n        // Total yield is any pending yield plus any previously calculated yield\n        uint256 pending = bucket.amount * (pool.accHelixTokenPerShare) / (1e12) - (bucket.rewardDebt);\n        uint256 yield = bucket.yield + pending;\n\n        require(\n            _yield <= yield,\n            \"MasterChef: insufficient balance\"\n        );\n\n        // Update bucket state\n        bucket.rewardDebt = bucket.amount * (pool.accHelixTokenPerShare) / (1e12);\n        yield -= _yield;\n\n        refRegister.rewardStake(msg.sender, yield);\n        safeHelixTokenTransfer(_recipient, _yield);\n\n        emit BucketWithdrawYieldTo(msg.sender, _recipient, _bucketId, _poolId, _yield);\n    }\n\n    // Update _poolId and _bucketId yield and rewardDebt\n    function updateBucket(uint256 _bucketId, uint256 _poolId) external isNotHelixPoolId(_poolId) {\n        PoolInfo storage pool = poolInfo[_poolId];\n        BucketInfo storage bucket = bucketInfo[_poolId][msg.sender][_bucketId];\n\n        updatePool(_poolId);\n\n        bucket.yield += bucket.amount * (pool.accHelixTokenPerShare) / (1e12) - (bucket.rewardDebt);\n        bucket.rewardDebt = bucket.amount * (pool.accHelixTokenPerShare) / (1e12);\n\n        emit UpdateBucket(msg.sender, _bucketId, _poolId);\n    }\n\n    function getBucketYield(uint256 _bucketId, uint256 _poolId) \n        external \n        view \n        isNotHelixPoolId(_poolId)\n        returns (uint256 yield) \n    {\n        BucketInfo memory bucket = bucketInfo[_poolId][msg.sender][_bucketId];\n        yield = bucket.yield;\n    }\n\n    // Stake HelixToken tokens to MasterChef\n    function enterStaking(uint256 _amount) external whenNotPaused {\n        PoolInfo storage pool = poolInfo[0];\n        UserInfo storage user = userInfo[0][msg.sender];\n\n        updatePool(0);\n        depositedHelix += _amount;\n\n        uint256 pending = user.amount * (pool.accHelixTokenPerShare) / (1e12) - (user.rewardDebt);\n        user.amount += _amount;\n        user.rewardDebt = user.amount * (pool.accHelixTokenPerShare) / (1e12);\n        \n        if (pending > 0) {\n            refRegister.rewardStake(msg.sender, pending);\n            safeHelixTokenTransfer(msg.sender, pending);\n        }\n        if (_amount > 0) {\n            TransferHelper.safeTransferFrom(address(pool.lpToken), address(msg.sender), address(this), _amount);\n        }\n\n        emit Deposit(msg.sender, 0, _amount);\n    }\n\n    // Withdraw HelixToken tokens from STAKING.\n    function leaveStaking(uint256 _amount) external whenNotPaused {\n        PoolInfo storage pool = poolInfo[0];\n        UserInfo storage user = userInfo[0][msg.sender];\n\n        updatePool(0);\n        depositedHelix -= _amount;\n\n        require(user.amount >= _amount, \"MasterChef: insufficient balance\");\n\n        uint256 pending = user.amount * (pool.accHelixTokenPerShare) / (1e12) - (user.rewardDebt);\n        user.amount -= _amount;\n        user.rewardDebt = user.amount * (pool.accHelixTokenPerShare) / (1e12);\n\n        if (pending > 0) {\n            refRegister.rewardStake(msg.sender, pending);\n            safeHelixTokenTransfer(msg.sender, pending);\n        }\n        if (_amount > 0) {\n            TransferHelper.safeTransfer(address(pool.lpToken), address(msg.sender), _amount);\n        }\n\n        emit Withdraw(msg.sender, 0, _amount);\n    }\n\n    // Withdraw without caring about rewards. EMERGENCY ONLY.\n    function emergencyWithdraw(uint256 _pid) external {\n        PoolInfo memory pool = poolInfo[_pid];\n        UserInfo storage user = userInfo[_pid][msg.sender];\n\n        uint256 _amount = user.amount;\n        user.amount = 0;\n        user.rewardDebt = 0;\n\n        TransferHelper.safeTransfer(address(pool.lpToken), address(msg.sender), _amount);\n\n        emit EmergencyWithdraw(msg.sender, _pid, _amount);\n    }\n\n    /// Return the portion of toMintPerBlock assigned to staking and farms\n    function getStakeToMintPerBlock() external view returns (uint256) {\n        return _getStakeToMintPerBlock();\n    }\n\n    /// Return the portion of toMintPerBlock assigned to dev team\n    function getDevToMintPerBlock() external view returns (uint256) {\n        return _getDevToMintPerBlock();\n    }\n\n    /// Return the toMintPerBlock rate assigned to this contract by the feeMinter\n    function getToMintPerBlock() external view returns (uint256) {\n        return _getToMintPerBlock();\n    }\n    // Safe HelixToken transfer function, just in case if rounding error causes pool to not have enough HelixTokens.\n    function safeHelixTokenTransfer(address _to, uint256 _amount) internal {\n        uint256 helixTokenBal = helixToken.balanceOf(address(this));\n        uint256 toTransfer = _amount > helixTokenBal ? helixTokenBal : _amount;\n        require(helixToken.transfer(_to, toTransfer), \"MasterChef: transfer failed\");\n    }\n\n    function setDevAddress(address _devaddr) external onlyTimelock {\n        devaddr = _devaddr;\n        emit DevAddressSet(_devaddr);\n    }\n\n    function setFeeMinter(address _feeMinter) external onlyTimelock {\n        feeMinter = IFeeMinter(_feeMinter);\n        emit SetFeeMinter(msg.sender, _feeMinter);\n    }\n\n    // Return the portion of toMintPerBlock assigned to staking and farms\n    function _getStakeToMintPerBlock() private view returns (uint256) {\n        return _getToMintPerBlock() * stakingPercent / percentDec;\n    }\n\n    // Return the portion of toMintPerBlock assigned to dev team\n    function _getDevToMintPerBlock() private view returns (uint256) {\n        return _getToMintPerBlock() * devPercent / percentDec;\n    }\n\n    // Return the toMintPerBlock rate assigned to this contract by the feeMinter\n    function _getToMintPerBlock() private view returns (uint256) {\n        require(address(feeMinter) != address(0), \"MasterChef: fee minter unassigned\");\n        return feeMinter.getToMintPerBlock(address(this));\n    }\n\n    function setDevAndStakingPercents(uint256 _devPercent, uint256 _stakingPercent) external onlyOwner {\n        require(_stakingPercent + _devPercent == 1000000, \"MasterChef: invalid percents\");\n        stakingPercent = _stakingPercent;\n        devPercent = _devPercent;\n    }\n}\n"
    },
    "contracts/tokens/HelixToken.sol": {
      "content": "//SPDX-License-Identifier:MIT\npragma solidity >=0.8.0;\n\n// Copied and modified from YAM code:\n// https://github.com/yam-finance/yam-protocol/blob/master/contracts/token/YAMGovernanceStorage.sol\n// https://github.com/yam-finance/yam-protocol/blob/master/contracts/token/YAMGovernance.sol\n// Which is copied and modified from COMPOUND:\n// https://github.com/compound-finance/compound-protocol/blob/master/contracts/Governance/Comp.sol\n\nimport \"../libraries/ERC20.sol\";\nimport \"@openzeppelin/contracts/utils/structs/EnumerableSet.sol\";\n\n/// Geometry governance token\ncontract HelixToken is ERC20(\"Helix\", \"HELIX\") {\n    using EnumerableSet for EnumerableSet.AddressSet;\n\n    // @notice Checkpoint for marking number of votes from a given block\n    struct Checkpoint {\n        uint32 fromBlock;\n        uint256 votes;\n    }\n\n    /// @notice The EIP-712 typehash for the contract's domain\n    bytes32 public constant DOMAIN_TYPEHASH =\n        keccak256(\n            \"EIP712Domain(string name,uint256 chainId,address verifyingContract)\"\n        );\n\n    /// @notice The EIP-712 typehash for the delegation struct used by the contract\n    bytes32 public constant DELEGATION_TYPEHASH =\n        keccak256(\"Delegation(address delegatee,uint256 nonce,uint256 expiry)\");\n\n    // Set of addresses which can mint HELIX\n    EnumerableSet.AddressSet private _minters;\n \n    /// @dev A record of each accounts delegate\n    mapping(address => address) internal _delegates;\n\n    /// @notice A record of votes checkpoints for each account, by index\n    mapping(address => mapping(uint32 => Checkpoint)) public checkpoints;\n\n    /// @notice The number of checkpoints for each account\n    mapping(address => uint32) public numCheckpoints;\n\n    /// @notice A record of states for signing / validating signatures\n    mapping(address => uint256) public nonces;\n\n    /// @notice An event that's emitted when an account changes its delegate\n    event DelegateChanged(\n        address indexed delegator,\n        address indexed fromDelegate,\n        address indexed toDelegate\n    );\n\n    /// @notice An event that's emitted when a delegate account's vote balance changes\n    event DelegateVotesChanged(\n        address indexed delegate,\n        uint256 previousBalance,\n        uint256 newBalance\n    );\n\n    modifier onlyMinter() {\n        require(isMinter(msg.sender), \"Helix: not minter\");\n        _;\n    }\n\n    modifier onlyValidAddress(address _address) {\n        require(_address != address(0), \"Helix: zero address\");\n        _;\n    }\n\n    /// @notice Creates _amount of token to _to.\n    function mint(address _to, uint256 _amount)\n        external \n        onlyMinter\n        returns (bool)\n    {\n        _mint(_to, _amount);\n        _moveDelegates(address(0), _delegates[_to], _amount);\n        return true;\n    }\n\n    /// @notice Destroys _amount tokens from _account reducing the total supply\n    function burn(address _account, uint256 _amount) external onlyMinter {\n        _burn(_account, _amount);\n    }\n\n    /// @notice Delegate votes from msg.sender to _delegatee\n    /// @param _delegatee The address to delegate votes to\n    function delegate(address _delegatee) external {\n        return _delegate(msg.sender, _delegatee);\n    }\n\n    /**\n     * @notice Delegates votes from signatory to `delegatee`\n     * @param _delegatee The address to delegate votes to\n     * @param _nonce The contract state required to match the signature\n     * @param _expiry The time at which to expire the signature\n     * @param _v The recovery byte of the signature\n     * @param _r Half of the ECDSA signature pair\n     * @param _s Half of the ECDSA signature pair\n     */\n    function delegateBySig(\n        address _delegatee,\n        uint256 _nonce,\n        uint256 _expiry,\n        uint8 _v,\n        bytes32 _r,\n        bytes32 _s\n    ) external {\n        bytes32 domainSeparator = keccak256(\n            abi.encode(\n                DOMAIN_TYPEHASH,\n                keccak256(bytes(name())),\n                _getChainId(),\n                address(this)\n            )\n        );\n\n        bytes32 structHash = keccak256(\n            abi.encode(DELEGATION_TYPEHASH, _delegatee, _nonce, _expiry)\n        );\n\n        bytes32 digest = keccak256(\n            abi.encodePacked(\"\\x19\\x01\", domainSeparator, structHash)\n        );\n\n        address signatory = ecrecover(digest, _v, _r, _s);\n\n        require(signatory != address(0), \"Helix: invalid signature\");\n        require(_nonce == nonces[signatory]++, \"Helix: invalid nonce\");\n        require(block.timestamp <= _expiry, \"Helix: signature expired\");\n\n        return _delegate(signatory, _delegatee);\n    }\n\n    /**\n     * @dev used by owner to delete minter of token\n     * @param _delMinter address of minter to be deleted.\n     * @return true if successful.\n     */\n    function delMinter(address _delMinter) external onlyOwner onlyValidAddress(_delMinter) returns (bool) {\n        return EnumerableSet.remove(_minters, _delMinter);\n    }\n\n    /// @notice Delegate votes from msg.sender to _delegatee\n    /// @param _delegator The address to get delegatee for\n    function delegates(address _delegator) external view returns (address) {\n        return _delegates[_delegator];\n    }\n\n    /**\n     * @notice Gets the current votes balance for `account`\n     * @param _account The address to get votes balance\n     * @return The number of current votes for `account`\n     */\n    function getCurrentVotes(address _account) external view returns (uint256) {\n        uint32 nCheckpoints = numCheckpoints[_account];\n        return\n            nCheckpoints > 0 ? checkpoints[_account][nCheckpoints - 1].votes : 0;\n    }\n\n    /**\n     * @notice Determine the prior number of votes for an account as of a block number\n     * @dev Block number must be a finalized block or else this function will revert to prevent misinformation.\n     * @param _account The address of the account to check\n     * @param _blockNumber The block number to get the vote balance at\n     * @return The number of votes the account had as of the given block\n     */\n    function getPriorVotes(address _account, uint256 _blockNumber)\n        external\n        view\n        returns (uint256)\n    {\n        require(_blockNumber < block.number, \"Helix: invalid blockNumber\");\n\n        uint32 nCheckpoints = numCheckpoints[_account];\n        if (nCheckpoints == 0) {\n            return 0;\n        }\n\n        // First check most recent balance\n        if (checkpoints[_account][nCheckpoints - 1].fromBlock <= _blockNumber) {\n            return checkpoints[_account][nCheckpoints - 1].votes;\n        }\n\n        // Next check implicit zero balance\n        if (checkpoints[_account][0].fromBlock > _blockNumber) {\n            return 0;\n        }\n\n        uint32 lower = 0;\n        uint32 upper = nCheckpoints - 1;\n        while (upper > lower) {\n            uint32 center = upper - (upper - lower) / 2; // ceil, avoiding overflow\n            Checkpoint memory cp = checkpoints[_account][center];\n            if (cp.fromBlock == _blockNumber) {\n                return cp.votes;\n            } else if (cp.fromBlock < _blockNumber) {\n                lower = center;\n            } else {\n                upper = center - 1;\n            }\n        }\n        return checkpoints[_account][lower].votes;\n    }\n\n    /**\n     * @dev used by get the minter at n location\n     * @param _index index of address set\n     * @return address of minter at index.\n     */\n    function getMinter(uint256 _index)\n        external\n        view\n        onlyOwner\n        returns (address)\n    {\n        require(_index <= getMinterLength() - 1, \"Helix: index out of bounds\");\n        return EnumerableSet.at(_minters, _index);\n    }\n\n    /**\n     * @dev used by owner to add minter of token\n     * @param _addMinter address of minter to be added.\n     * @return true if successful.\n     */\n    function addMinter(address _addMinter) public onlyOwner onlyValidAddress(_addMinter) returns (bool) {\n        return EnumerableSet.add(_minters, _addMinter);\n    }\n\n    /// @dev used to get the number of minters for this token\n    /// @return number of minters.\n    function getMinterLength() public view returns (uint256) {\n        return EnumerableSet.length(_minters);\n    }\n\n    /// @dev used to check if an address is a minter of token\n    /// @return true or false based on minter status.\n    function isMinter(address _account) public view returns (bool) {\n        return EnumerableSet.contains(_minters, _account);\n    }\n\n    // internal function used delegate votes\n    function _delegate(address _delegator, address _delegatee) internal {\n        address currentDelegate = _delegates[_delegator];\n        uint256 delegatorBalance = balanceOf(_delegator); // balance of underlying HELIXs (not scaled);\n        _delegates[_delegator] = _delegatee;\n\n        emit DelegateChanged(_delegator, currentDelegate, _delegatee);\n\n        _moveDelegates(currentDelegate, _delegatee, delegatorBalance);\n    }\n\n    // send delegate votes from src to dst in amount\n    function _moveDelegates(\n        address _srcRep,\n        address _dstRep,\n        uint256 _amount\n    ) internal {\n        if (_srcRep != _dstRep && _amount > 0) {\n            if (_srcRep != address(0)) {\n                // decrease old representative\n                uint32 srcRepNum = numCheckpoints[_srcRep];\n                uint256 srcRepOld = srcRepNum > 0\n                    ? checkpoints[_srcRep][srcRepNum - 1].votes\n                    : 0;\n                uint256 srcRepNew = srcRepOld - _amount;\n                _writeCheckpoint(_srcRep, srcRepNum, srcRepOld, srcRepNew);\n            }\n\n            if (_dstRep != address(0)) {\n                // increase new representative\n                uint32 dstRepNum = numCheckpoints[_dstRep];\n                uint256 dstRepOld = dstRepNum > 0\n                    ? checkpoints[_dstRep][dstRepNum - 1].votes\n                    : 0;\n                uint256 dstRepNew = dstRepOld + _amount;\n                _writeCheckpoint(_dstRep, dstRepNum, dstRepOld, dstRepNew);\n            }\n        }\n    }\n\n    function _writeCheckpoint(\n        address _delegatee,\n        uint32 _nCheckpoints,\n        uint256 _oldVotes,\n        uint256 _newVotes\n    ) internal {\n        uint32 blockNumber = _safe32(\n            block.number,\n            \"HELIX::_writeCheckpoint: block number exceeds 32 bits\"\n        );\n\n        if (\n            _nCheckpoints > 0 &&\n            checkpoints[_delegatee][_nCheckpoints - 1].fromBlock == blockNumber\n        ) {\n            checkpoints[_delegatee][_nCheckpoints - 1].votes = _newVotes;\n        } else {\n            checkpoints[_delegatee][_nCheckpoints] = Checkpoint(\n                blockNumber,\n                _newVotes\n            );\n            numCheckpoints[_delegatee] = _nCheckpoints + 1;\n        }\n\n        emit DelegateVotesChanged(_delegatee, _oldVotes, _newVotes);\n    }\n\n    // @dev used get current chain ID\n    // @return id as a uint\n    function _getChainId() internal view returns (uint256 id) {\n        id = block.chainid;\n    }\n\n    /*\n     * @dev Checks if value is 32 bits\n     * @param _n value to be checked\n     * @param _errorMessage error message to throw if fails\n     * @return The number if valid.\n     */\n    function _safe32(uint256 _n, string memory _errorMessage)\n        internal\n        pure\n        returns (uint32)\n    {\n        require(_n < 2**32, _errorMessage);\n        return uint32(_n);\n    }\n}\n"
    },
    "contracts/interfaces/IReferralRegister.sol": {
      "content": "// SPDX-License-Identifier: MIT\npragma solidity >=0.8.0;\n\nimport \"./IHelixToken.sol\";\n\ninterface IReferralRegister {\n    function toMintPerBlock() external view returns (uint256);\n    function helixToken() external view returns (IHelixToken);\n    function stakeRewardPercent() external view returns (uint256);\n    function swapRewardPercent() external view returns (uint256);\n    function lastMintBlock() external view returns (uint256);\n    function referrers(address _referred) external view returns (address);\n    function rewards(address _referrer) external view returns (uint256);\n\n    function initialize(\n        IHelixToken _helixToken, \n        address _feeHandler,\n        uint256 _stakeRewardPercent, \n        uint256 _swapRewardPercent,\n        uint256 _toMintPerBlock,\n        uint256 _lastMintBlock\n    ) external; \n\n    function rewardStake(address _referred, uint256 _stakeAmount) external;\n    function rewardSwap(address _referred, uint256 _swapAmount) external;\n    function withdraw() external;\n    function setToMintPerBlock(uint256 _toMintPerBlock) external;\n    function setStakeRewardPercent(uint256 _stakeRewardPercent) external;\n    function setSwapRewardPercent(uint256 _swapRewardPercent) external;\n    function addReferrer(address _referrer) external;\n    function removeReferrer() external;\n    function update() external;\n    function addRecorder(address _recorder) external returns (bool);\n    function removeRecorder(address _recorder) external returns (bool);\n    function setLastRewardBlock(uint256 _lastMintBlock) external;\n    function pause() external;\n    function unpause() external;\n    function setFeeHandler(address _feeHandler) external;\n    function setCollectorPercent(uint256 _collectorPercent) external;\n    function getRecorder(uint256 _index) external view returns (address);\n    function getRecorderLength() external view returns (uint256);\n    function isRecorder(address _address) external view returns (bool);\n}\n"
    },
    "contracts/interfaces/IFeeMinter.sol": {
      "content": "// SPDX-License-Identifer: MIT\npragma solidity >=0.8.0;\n\ninterface IFeeMinter {\n    function totalToMintPerBlock() external view returns (uint256);\n    function minters(uint256 index) external view returns (address);\n    function setTotalToMintPerBlock(uint256 _totalToMintPerBlock) external;\n    function setToMintPercents(address[] calldata _minters, uint256[] calldata _toMintPercents) external;\n    function getToMintPerBlock(address _minter) external view returns (uint256);\n    function getMinters() external view returns (address[] memory);\n    function getToMintPercent(address _minter) external view returns (uint256);\n}\n"
    },
    "contracts/timelock/OwnableTimelockUpgradeable.sol": {
      "content": "// SPDX-License-Identifier: MIT\npragma solidity >=0.8.0;\n\nimport \"@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol\";\nimport \"@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol\";\n\n/**\n * @dev Contract module which provides a basic access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership}.\n *\n * This module is used through inheritance. It will make available the modifier\n * `onlyOwner`, which can be applied to your functions to restrict their use to\n * the owner.\n */\nabstract contract OwnableTimelockUpgradeable is Initializable, ContextUpgradeable {\n    error CallerIsNotTimelockOwner();\n    error ZeroTimelockAddress();\n\n    address private _timelockOwner;\n\n    event TimelockOwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n    /**\n     * @dev Initializes the contract setting the deployer as the initial owner.\n     */\n    function __OwnableTimelock_init() internal onlyInitializing {\n        __OwnableTimelock_init_unchained();\n    }\n\n    function __OwnableTimelock_init_unchained() internal onlyInitializing {\n        _transferTimelockOwnership(_msgSender());\n    }\n\n    /**\n     * @dev Throws if called by any account other than the owner.\n     */\n    modifier onlyTimelock() {\n        _checkTimelockOwner();\n        _;\n    }\n\n    /**\n     * @dev Returns the address of the current owner.\n     */\n    function timelockOwner() public view virtual returns (address) {\n        return _timelockOwner;\n    }\n\n    /**\n     * @dev Throws if the sender is not the owner.\n     */\n    function _checkTimelockOwner() internal view virtual {\n        if (timelockOwner() != _msgSender()) revert CallerIsNotTimelockOwner();\n    }\n\n    /**\n     * @dev Leaves the contract without owner. It will not be possible to call\n     * `onlyOwner` functions anymore. Can only be called by the current owner.\n     *\n     * NOTE: Renouncing ownership will leave the contract without an owner,\n     * thereby removing any functionality that is only available to the owner.\n     */\n    function renounceTimelockOwnership() public virtual onlyTimelock {\n        _transferTimelockOwnership(address(0));\n    }\n\n    /**\n     * @dev Transfers ownership of the contract to a new account (`newOwner`).\n     * Can only be called by the current owner.\n     */\n    function transferTimelockOwnership(address newOwner) public virtual onlyTimelock {\n        if (newOwner == address(0)) revert ZeroTimelockAddress();\n        _transferTimelockOwnership(newOwner);\n    }\n\n    /**\n     * @dev Transfers ownership of the contract to a new account (`newOwner`).\n     * Internal function without access restriction.\n     */\n    function _transferTimelockOwnership(address newOwner) internal virtual {\n        address oldOwner = _timelockOwner;\n        _timelockOwner = newOwner;\n        emit TimelockOwnershipTransferred(oldOwner, newOwner);\n    }\n\n    /**\n     * @dev This empty reserved space is put in place to allow future versions to add new\n     * variables without shifting down storage in the inheritance chain.\n     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n     */\n    uint256[49] private __gap;\n}\n"
    },
    "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.6.0) (proxy/utils/Initializable.sol)\n\npragma solidity ^0.8.2;\n\nimport \"../../utils/AddressUpgradeable.sol\";\n\n/**\n * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed\n * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an\n * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer\n * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.\n *\n * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be\n * reused. This mechanism prevents re-execution of each \"step\" but allows the creation of new initialization steps in\n * case an upgrade adds a module that needs to be initialized.\n *\n * For example:\n *\n * [.hljs-theme-light.nopadding]\n * ```\n * contract MyToken is ERC20Upgradeable {\n *     function initialize() initializer public {\n *         __ERC20_init(\"MyToken\", \"MTK\");\n *     }\n * }\n * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {\n *     function initializeV2() reinitializer(2) public {\n *         __ERC20Permit_init(\"MyToken\");\n *     }\n * }\n * ```\n *\n * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as\n * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.\n *\n * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure\n * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.\n *\n * [CAUTION]\n * ====\n * Avoid leaving a contract uninitialized.\n *\n * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation\n * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke\n * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:\n *\n * [.hljs-theme-light.nopadding]\n * ```\n * /// @custom:oz-upgrades-unsafe-allow constructor\n * constructor() {\n *     _disableInitializers();\n * }\n * ```\n * ====\n */\nabstract contract Initializable {\n    /**\n     * @dev Indicates that the contract has been initialized.\n     * @custom:oz-retyped-from bool\n     */\n    uint8 private _initialized;\n\n    /**\n     * @dev Indicates that the contract is in the process of being initialized.\n     */\n    bool private _initializing;\n\n    /**\n     * @dev Triggered when the contract has been initialized or reinitialized.\n     */\n    event Initialized(uint8 version);\n\n    /**\n     * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,\n     * `onlyInitializing` functions can be used to initialize parent contracts. Equivalent to `reinitializer(1)`.\n     */\n    modifier initializer() {\n        bool isTopLevelCall = _setInitializedVersion(1);\n        if (isTopLevelCall) {\n            _initializing = true;\n        }\n        _;\n        if (isTopLevelCall) {\n            _initializing = false;\n            emit Initialized(1);\n        }\n    }\n\n    /**\n     * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the\n     * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be\n     * used to initialize parent contracts.\n     *\n     * `initializer` is equivalent to `reinitializer(1)`, so a reinitializer may be used after the original\n     * initialization step. This is essential to configure modules that are added through upgrades and that require\n     * initialization.\n     *\n     * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in\n     * a contract, executing them in the right order is up to the developer or operator.\n     */\n    modifier reinitializer(uint8 version) {\n        bool isTopLevelCall = _setInitializedVersion(version);\n        if (isTopLevelCall) {\n            _initializing = true;\n        }\n        _;\n        if (isTopLevelCall) {\n            _initializing = false;\n            emit Initialized(version);\n        }\n    }\n\n    /**\n     * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the\n     * {initializer} and {reinitializer} modifiers, directly or indirectly.\n     */\n    modifier onlyInitializing() {\n        require(_initializing, \"Initializable: contract is not initializing\");\n        _;\n    }\n\n    /**\n     * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.\n     * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized\n     * to any version. It is recommended to use this to lock implementation contracts that are designed to be called\n     * through proxies.\n     */\n    function _disableInitializers() internal virtual {\n        _setInitializedVersion(type(uint8).max);\n    }\n\n    function _setInitializedVersion(uint8 version) private returns (bool) {\n        // If the contract is initializing we ignore whether _initialized is set in order to support multiple\n        // inheritance patterns, but we only do this in the context of a constructor, and for the lowest level\n        // of initializers, because in other contexts the contract may have been reentered.\n        if (_initializing) {\n            require(\n                version == 1 && !AddressUpgradeable.isContract(address(this)),\n                \"Initializable: contract is already initialized\"\n            );\n            return false;\n        } else {\n            require(_initialized < version, \"Initializable: contract is already initialized\");\n            _initialized = version;\n            return true;\n        }\n    }\n}\n"
    },
    "@openzeppelin/contracts-upgradeable/security/PausableUpgradeable.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (security/Pausable.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../utils/ContextUpgradeable.sol\";\nimport \"../proxy/utils/Initializable.sol\";\n\n/**\n * @dev Contract module which allows children to implement an emergency stop\n * mechanism that can be triggered by an authorized account.\n *\n * This module is used through inheritance. It will make available the\n * modifiers `whenNotPaused` and `whenPaused`, which can be applied to\n * the functions of your contract. Note that they will not be pausable by\n * simply including this module, only once the modifiers are put in place.\n */\nabstract contract PausableUpgradeable is Initializable, ContextUpgradeable {\n    /**\n     * @dev Emitted when the pause is triggered by `account`.\n     */\n    event Paused(address account);\n\n    /**\n     * @dev Emitted when the pause is lifted by `account`.\n     */\n    event Unpaused(address account);\n\n    bool private _paused;\n\n    /**\n     * @dev Initializes the contract in unpaused state.\n     */\n    function __Pausable_init() internal onlyInitializing {\n        __Pausable_init_unchained();\n    }\n\n    function __Pausable_init_unchained() internal onlyInitializing {\n        _paused = false;\n    }\n\n    /**\n     * @dev Returns true if the contract is paused, and false otherwise.\n     */\n    function paused() public view virtual returns (bool) {\n        return _paused;\n    }\n\n    /**\n     * @dev Modifier to make a function callable only when the contract is not paused.\n     *\n     * Requirements:\n     *\n     * - The contract must not be paused.\n     */\n    modifier whenNotPaused() {\n        require(!paused(), \"Pausable: paused\");\n        _;\n    }\n\n    /**\n     * @dev Modifier to make a function callable only when the contract is paused.\n     *\n     * Requirements:\n     *\n     * - The contract must be paused.\n     */\n    modifier whenPaused() {\n        require(paused(), \"Pausable: not paused\");\n        _;\n    }\n\n    /**\n     * @dev Triggers stopped state.\n     *\n     * Requirements:\n     *\n     * - The contract must not be paused.\n     */\n    function _pause() internal virtual whenNotPaused {\n        _paused = true;\n        emit Paused(_msgSender());\n    }\n\n    /**\n     * @dev Returns to normal state.\n     *\n     * Requirements:\n     *\n     * - The contract must be paused.\n     */\n    function _unpause() internal virtual whenPaused {\n        _paused = false;\n        emit Unpaused(_msgSender());\n    }\n\n    /**\n     * @dev This empty reserved space is put in place to allow future versions to add new\n     * variables without shifting down storage in the inheritance chain.\n     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n     */\n    uint256[49] private __gap;\n}\n"
    },
    "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../utils/ContextUpgradeable.sol\";\nimport \"../proxy/utils/Initializable.sol\";\n\n/**\n * @dev Contract module which provides a basic access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership}.\n *\n * This module is used through inheritance. It will make available the modifier\n * `onlyOwner`, which can be applied to your functions to restrict their use to\n * the owner.\n */\nabstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {\n    address private _owner;\n\n    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n    /**\n     * @dev Initializes the contract setting the deployer as the initial owner.\n     */\n    function __Ownable_init() internal onlyInitializing {\n        __Ownable_init_unchained();\n    }\n\n    function __Ownable_init_unchained() internal onlyInitializing {\n        _transferOwnership(_msgSender());\n    }\n\n    /**\n     * @dev Returns the address of the current owner.\n     */\n    function owner() public view virtual returns (address) {\n        return _owner;\n    }\n\n    /**\n     * @dev Throws if called by any account other than the owner.\n     */\n    modifier onlyOwner() {\n        require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n        _;\n    }\n\n    /**\n     * @dev Leaves the contract without owner. It will not be possible to call\n     * `onlyOwner` functions anymore. Can only be called by the current owner.\n     *\n     * NOTE: Renouncing ownership will leave the contract without an owner,\n     * thereby removing any functionality that is only available to the owner.\n     */\n    function renounceOwnership() public virtual onlyOwner {\n        _transferOwnership(address(0));\n    }\n\n    /**\n     * @dev Transfers ownership of the contract to a new account (`newOwner`).\n     * Can only be called by the current owner.\n     */\n    function transferOwnership(address newOwner) public virtual onlyOwner {\n        require(newOwner != address(0), \"Ownable: new owner is the zero address\");\n        _transferOwnership(newOwner);\n    }\n\n    /**\n     * @dev Transfers ownership of the contract to a new account (`newOwner`).\n     * Internal function without access restriction.\n     */\n    function _transferOwnership(address newOwner) internal virtual {\n        address oldOwner = _owner;\n        _owner = newOwner;\n        emit OwnershipTransferred(oldOwner, newOwner);\n    }\n\n    /**\n     * @dev This empty reserved space is put in place to allow future versions to add new\n     * variables without shifting down storage in the inheritance chain.\n     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n     */\n    uint256[49] private __gap;\n}\n"
    },
    "@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Interface of the ERC20 standard as defined in the EIP.\n */\ninterface IERC20Upgradeable {\n    /**\n     * @dev Emitted when `value` tokens are moved from one account (`from`) to\n     * another (`to`).\n     *\n     * Note that `value` may be zero.\n     */\n    event Transfer(address indexed from, address indexed to, uint256 value);\n\n    /**\n     * @dev Emitted when the allowance of a `spender` for an `owner` is set by\n     * a call to {approve}. `value` is the new allowance.\n     */\n    event Approval(address indexed owner, address indexed spender, uint256 value);\n\n    /**\n     * @dev Returns the amount of tokens in existence.\n     */\n    function totalSupply() external view returns (uint256);\n\n    /**\n     * @dev Returns the amount of tokens owned by `account`.\n     */\n    function balanceOf(address account) external view returns (uint256);\n\n    /**\n     * @dev Moves `amount` tokens from the caller's account to `to`.\n     *\n     * Returns a boolean value indicating whether the operation succeeded.\n     *\n     * Emits a {Transfer} event.\n     */\n    function transfer(address to, uint256 amount) external returns (bool);\n\n    /**\n     * @dev Returns the remaining number of tokens that `spender` will be\n     * allowed to spend on behalf of `owner` through {transferFrom}. This is\n     * zero by default.\n     *\n     * This value changes when {approve} or {transferFrom} are called.\n     */\n    function allowance(address owner, address spender) external view returns (uint256);\n\n    /**\n     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.\n     *\n     * Returns a boolean value indicating whether the operation succeeded.\n     *\n     * IMPORTANT: Beware that changing an allowance with this method brings the risk\n     * that someone may use both the old and the new allowance by unfortunate\n     * transaction ordering. One possible solution to mitigate this race\n     * condition is to first reduce the spender's allowance to 0 and set the\n     * desired value afterwards:\n     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729\n     *\n     * Emits an {Approval} event.\n     */\n    function approve(address spender, uint256 amount) external returns (bool);\n\n    /**\n     * @dev Moves `amount` tokens from `from` to `to` using the\n     * allowance mechanism. `amount` is then deducted from the caller's\n     * allowance.\n     *\n     * Returns a boolean value indicating whether the operation succeeded.\n     *\n     * Emits a {Transfer} event.\n     */\n    function transferFrom(\n        address from,\n        address to,\n        uint256 amount\n    ) external returns (bool);\n}\n"
    },
    "@uniswap/lib/contracts/libraries/TransferHelper.sol": {
      "content": "pragma solidity >=0.6.0;\n\n// helper methods for interacting with ERC20 tokens and sending ETH that do not consistently return true/false\nlibrary TransferHelper {\n    function safeApprove(address token, address to, uint value) internal {\n        // bytes4(keccak256(bytes('approve(address,uint256)')));\n        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value));\n        require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: APPROVE_FAILED');\n    }\n\n    function safeTransfer(address token, address to, uint value) internal {\n        // bytes4(keccak256(bytes('transfer(address,uint256)')));\n        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value));\n        require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: TRANSFER_FAILED');\n    }\n\n    function safeTransferFrom(address token, address from, address to, uint value) internal {\n        // bytes4(keccak256(bytes('transferFrom(address,address,uint256)')));\n        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value));\n        require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: TRANSFER_FROM_FAILED');\n    }\n\n    function safeTransferETH(address to, uint value) internal {\n        (bool success,) = to.call{value:value}(new bytes(0));\n        require(success, 'TransferHelper: ETH_TRANSFER_FAILED');\n    }\n}\n"
    },
    "contracts/libraries/ERC20.sol": {
      "content": "//SPDX-License-Identifier:MIT\npragma solidity >=0.8.0;\n\nimport \"@openzeppelin/contracts/access/Ownable.sol\";\nimport \"@openzeppelin/contracts/token/ERC20/IERC20.sol\";\nimport \"@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol\";\n\ncontract ERC20 is Context, Ownable, IERC20, IERC20Metadata {\n    uint256 private constant _maxSupply = 1000000000 * 1e18;        // 1B\n    uint256 private constant _preMineSupply = 0;\n\n    mapping(address => uint256) private _balances;\n\n    mapping(address => mapping(address => uint256)) private _allowances;\n\n    uint256 private _totalSupply;\n\n    string private _name;\n    string private _symbol;\n\n    /**\n     * @dev Sets the values for {name} and {symbol}, initializes {decimals} with\n     * a default value of 18.\n     *\n     *\n     * All three of these values are immutable: they can only be set once during\n     * construction.\n     */\n    constructor(string memory tokenName, string memory tokenSymbol) {\n        _name = tokenName;\n        _symbol = tokenSymbol;\n\n        _mint(msg.sender, _preMineSupply); // mint token to msg owner\n    }\n\n    /**\n     * @dev Returns the bep token owner.\n     */\n    function getOwner() external view returns (address) {\n        return owner();\n    }\n\n    /**\n     * @dev Returns the token name.\n     */\n    function name() public view virtual override returns (string memory) {\n        return _name;\n    }\n\n    /**\n     * @dev Returns the token symbol.\n     */\n    function symbol() public view virtual override returns (string memory) {\n        return _symbol;\n    }\n\n    /**\n     * @dev Returns the number of decimals used to get its user representation.\n     * For example, if `decimals` equals `2`, a balance of `505` tokens should\n     * be displayed to a user as `5.05` (`505 / 10 ** 2`).\n     *\n     * Tokens usually opt for a value of 18, imitating the relationship between\n     * Ether and Wei. This is the value {ERC20} uses, unless this function is\n     * overridden;\n     *\n     * NOTE: This information is only used for _display_ purposes: it in\n     * no way affects any of the arithmetic of the contract, including\n     * {IERC20-balanceOf} and {IERC20-transfer}.\n     */\n    function decimals() public view virtual override returns (uint8) {\n        return 18;\n    }\n\n    /**\n     * @dev See {IERC20-totalSupply}.\n     */\n    function totalSupply() public view virtual override returns (uint256) {\n        return _totalSupply;\n    }\n\n    /**\n     * @dev See {IERC20-balanceOf}.\n     */\n    function balanceOf(address account)\n        public\n        view\n        virtual\n        override\n        returns (uint256)\n    {\n        return _balances[account];\n    }\n\n    /**\n     * @notice supply that was mented to the contract owner.\n     */\n\n    function preMineSupply() public pure returns (uint256) {\n        return _preMineSupply;\n    }\n\n    /**\n     * @notice max supply that can eer be minted.\n     */\n    function maxSupply() public pure returns (uint256) {\n        return _maxSupply;\n    }\n\n    /**\n     * @dev See {IERC20-transfer}.\n     *\n     * Requirements:\n     *\n     * - `recipient` cannot be the zero address.\n     * - the caller must have a balance of at least `amount`.\n     */\n    function transfer(address recipient, uint256 amount)\n        public\n        virtual\n        override\n        returns (bool)\n    {\n        _transfer(_msgSender(), recipient, amount);\n        return true;\n    }\n\n    /**\n     * @dev See {IERC20-allowance}.\n     */\n    function allowance(address owner, address spender)\n        public\n        view\n        virtual\n        override\n        returns (uint256)\n    {\n        return _allowances[owner][spender];\n    }\n\n    /**\n     * @dev See {IERC20-approve}.\n     *\n     * Requirements:\n     *\n     * - `spender` cannot be the zero address.\n     */\n    function approve(address spender, uint256 amount)\n        public\n        virtual\n        override\n        returns (bool)\n    {\n        _approve(_msgSender(), spender, amount);\n        return true;\n    }\n\n    /**\n     * @dev See {IERC20-transferFrom}.\n     *\n     * Emits an {Approval} event indicating the updated allowance. This is not\n     * required by the EIP. See the note at the beginning of {ERC20};\n     *\n     * Requirements:\n     * - `sender` and `recipient` cannot be the zero address.\n     * - `sender` must have a balance of at least `amount`.\n     * - the caller must have allowance for `sender`'s tokens of at least\n     * `amount`.\n     */\n    function transferFrom(\n        address sender,\n        address recipient,\n        uint256 amount\n    ) public virtual override returns (bool) {\n        _transfer(sender, recipient, amount);\n\n        uint256 currentAllowance = _allowances[sender][_msgSender()];\n        require(\n            currentAllowance >= amount,\n            \"ERC20: transfer amount exceeds allowance\"\n        );\n        unchecked {\n            _approve(sender, _msgSender(), currentAllowance - amount);\n        }\n        return true;\n    }\n\n    /**\n     * @dev Atomically increases the allowance granted to `spender` by the caller.\n     *\n     * This is an alternative to {approve} that can be used as a mitigation for\n     * problems described in {ERC20-approve}.\n     *\n     * Emits an {Approval} event indicating the updated allowance.\n     *\n     * Requirements:\n     *\n     * - `spender` cannot be the zero address.\n     */\n    function increaseAllowance(address spender, uint256 addedValue)\n        public\n        returns (bool)\n    {\n        _approve(\n            _msgSender(),\n            spender,\n            _allowances[_msgSender()][spender] + addedValue\n        );\n        return true;\n    }\n\n    /**\n     * @dev Atomically decreases the allowance granted to `spender` by the caller.\n     *\n     * This is an alternative to {approve} that can be used as a mitigation for\n     * problems described in {ERC20-approve}.\n     *\n     * Emits an {Approval} event indicating the updated allowance.\n     *\n     * Requirements:\n     *\n     * - `spender` cannot be the zero address.\n     * - `spender` must have allowance for the caller of at least\n     * `subtractedValue`.\n     */\n    function decreaseAllowance(address spender, uint256 subtractedValue)\n        public\n        returns (bool)\n    {\n        uint256 currentAllowance = _allowances[_msgSender()][spender];\n        require(\n            currentAllowance >= subtractedValue,\n            \"ERC20: decreased allowance below zero\"\n        );\n        unchecked {\n            _approve(_msgSender(), spender, currentAllowance - subtractedValue);\n        }\n        return true;\n    }\n\n    /**\n     * @dev Moves tokens `amount` from `sender` to `recipient`.\n     *\n     * This is internal function is equivalent to {transfer}, and can be used to\n     * e.g. implement automatic token fees, slashing mechanisms, etc.\n     *\n     * Emits a {Transfer} event.\n     *\n     * Requirements:\n     *\n     * - `sender` cannot be the zero address.\n     * - `recipient` cannot be the zero address.\n     * - `sender` must have a balance of at least `amount`.\n     */\n    function _transfer(\n        address sender,\n        address recipient,\n        uint256 amount\n    ) internal {\n        require(sender != address(0), \"ERC20: transfer from the zero address\");\n        require(recipient != address(0), \"ERC20: transfer to the zero address\");\n\n        _balances[sender] -= amount;\n        _balances[recipient] += amount;\n        emit Transfer(sender, recipient, amount);\n    }\n\n    /** @dev Creates `amount` tokens and assigns them to `account`, increasing\n     * the total supply.\n     *\n     * Emits a {Transfer} event with `from` set to the zero address.\n     *\n     * Requirements\n     *\n     * - `to` cannot be the zero address.\n     */\n    function _mint(address account, uint256 amount) internal virtual {\n        require(account != address(0), \"ERC20: mint to the zero address\");\n        if (amount + _totalSupply > _maxSupply) {\n            revert();\n            // return false;\n        }\n\n        _totalSupply += amount;\n        _balances[account] += amount;\n        emit Transfer(address(0), account, amount);\n    }\n\n    /**\n     * @dev Destroys `amount` tokens from `account`, reducing the\n     * total supply.\n     *\n     * Emits a {Transfer} event with `to` set to the zero address.\n     *\n     * Requirements\n     *\n     * - `account` cannot be the zero address.\n     * - `account` must have at least `amount` tokens.\n     */\n    function _burn(address account, uint256 amount) internal virtual {\n        require(account != address(0), \"ERC20: burn from the zero address\");\n\n        _balances[account] -= amount;\n        _totalSupply -= amount;\n        emit Transfer(account, address(0), amount);\n    }\n\n    /**\n     * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.\n     *\n     * This is internal function is equivalent to `approve`, and can be used to\n     * e.g. set automatic allowances for certain subsystems, etc.\n     *\n     * Emits an {Approval} event.\n     *\n     * Requirements:\n     *\n     * - `owner` cannot be the zero address.\n     * - `spender` cannot be the zero address.\n     */\n    function _approve(\n        address owner,\n        address spender,\n        uint256 amount\n    ) internal virtual {\n        require(owner != address(0), \"ERC20: approve from the zero address\");\n        require(spender != address(0), \"ERC20: approve to the zero address\");\n\n        _allowances[owner][spender] = amount;\n        emit Approval(owner, spender, amount);\n    }\n\n    /**\n     * @dev Destroys `amount` tokens from `account`.`amount` is then deducted\n     * from the caller's allowance.\n     *\n     * See {_burn} and {_approve}.\n     */\n    function _burnFrom(address account, uint256 amount) internal virtual {\n        _burn(account, amount);\n        _approve(\n            account,\n            _msgSender(),\n            _allowances[account][_msgSender()] - amount\n        );\n    }\n}\n"
    },
    "@openzeppelin/contracts/utils/structs/EnumerableSet.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.6.0) (utils/structs/EnumerableSet.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Library for managing\n * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive\n * types.\n *\n * Sets have the following properties:\n *\n * - Elements are added, removed, and checked for existence in constant time\n * (O(1)).\n * - Elements are enumerated in O(n). No guarantees are made on the ordering.\n *\n * ```\n * contract Example {\n *     // Add the library methods\n *     using EnumerableSet for EnumerableSet.AddressSet;\n *\n *     // Declare a set state variable\n *     EnumerableSet.AddressSet private mySet;\n * }\n * ```\n *\n * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)\n * and `uint256` (`UintSet`) are supported.\n */\nlibrary EnumerableSet {\n    // To implement this library for multiple types with as little code\n    // repetition as possible, we write it in terms of a generic Set type with\n    // bytes32 values.\n    // The Set implementation uses private functions, and user-facing\n    // implementations (such as AddressSet) are just wrappers around the\n    // underlying Set.\n    // This means that we can only create new EnumerableSets for types that fit\n    // in bytes32.\n\n    struct Set {\n        // Storage of set values\n        bytes32[] _values;\n        // Position of the value in the `values` array, plus 1 because index 0\n        // means a value is not in the set.\n        mapping(bytes32 => uint256) _indexes;\n    }\n\n    /**\n     * @dev Add a value to a set. O(1).\n     *\n     * Returns true if the value was added to the set, that is if it was not\n     * already present.\n     */\n    function _add(Set storage set, bytes32 value) private returns (bool) {\n        if (!_contains(set, value)) {\n            set._values.push(value);\n            // The value is stored at length-1, but we add 1 to all indexes\n            // and use 0 as a sentinel value\n            set._indexes[value] = set._values.length;\n            return true;\n        } else {\n            return false;\n        }\n    }\n\n    /**\n     * @dev Removes a value from a set. O(1).\n     *\n     * Returns true if the value was removed from the set, that is if it was\n     * present.\n     */\n    function _remove(Set storage set, bytes32 value) private returns (bool) {\n        // We read and store the value's index to prevent multiple reads from the same storage slot\n        uint256 valueIndex = set._indexes[value];\n\n        if (valueIndex != 0) {\n            // Equivalent to contains(set, value)\n            // To delete an element from the _values array in O(1), we swap the element to delete with the last one in\n            // the array, and then remove the last element (sometimes called as 'swap and pop').\n            // This modifies the order of the array, as noted in {at}.\n\n            uint256 toDeleteIndex = valueIndex - 1;\n            uint256 lastIndex = set._values.length - 1;\n\n            if (lastIndex != toDeleteIndex) {\n                bytes32 lastValue = set._values[lastIndex];\n\n                // Move the last value to the index where the value to delete is\n                set._values[toDeleteIndex] = lastValue;\n                // Update the index for the moved value\n                set._indexes[lastValue] = valueIndex; // Replace lastValue's index to valueIndex\n            }\n\n            // Delete the slot where the moved value was stored\n            set._values.pop();\n\n            // Delete the index for the deleted slot\n            delete set._indexes[value];\n\n            return true;\n        } else {\n            return false;\n        }\n    }\n\n    /**\n     * @dev Returns true if the value is in the set. O(1).\n     */\n    function _contains(Set storage set, bytes32 value) private view returns (bool) {\n        return set._indexes[value] != 0;\n    }\n\n    /**\n     * @dev Returns the number of values on the set. O(1).\n     */\n    function _length(Set storage set) private view returns (uint256) {\n        return set._values.length;\n    }\n\n    /**\n     * @dev Returns the value stored at position `index` in the set. O(1).\n     *\n     * Note that there are no guarantees on the ordering of values inside the\n     * array, and it may change when more values are added or removed.\n     *\n     * Requirements:\n     *\n     * - `index` must be strictly less than {length}.\n     */\n    function _at(Set storage set, uint256 index) private view returns (bytes32) {\n        return set._values[index];\n    }\n\n    /**\n     * @dev Return the entire set in an array\n     *\n     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed\n     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that\n     * this function has an unbounded cost, and using it as part of a state-changing function may render the function\n     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.\n     */\n    function _values(Set storage set) private view returns (bytes32[] memory) {\n        return set._values;\n    }\n\n    // Bytes32Set\n\n    struct Bytes32Set {\n        Set _inner;\n    }\n\n    /**\n     * @dev Add a value to a set. O(1).\n     *\n     * Returns true if the value was added to the set, that is if it was not\n     * already present.\n     */\n    function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {\n        return _add(set._inner, value);\n    }\n\n    /**\n     * @dev Removes a value from a set. O(1).\n     *\n     * Returns true if the value was removed from the set, that is if it was\n     * present.\n     */\n    function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {\n        return _remove(set._inner, value);\n    }\n\n    /**\n     * @dev Returns true if the value is in the set. O(1).\n     */\n    function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {\n        return _contains(set._inner, value);\n    }\n\n    /**\n     * @dev Returns the number of values in the set. O(1).\n     */\n    function length(Bytes32Set storage set) internal view returns (uint256) {\n        return _length(set._inner);\n    }\n\n    /**\n     * @dev Returns the value stored at position `index` in the set. O(1).\n     *\n     * Note that there are no guarantees on the ordering of values inside the\n     * array, and it may change when more values are added or removed.\n     *\n     * Requirements:\n     *\n     * - `index` must be strictly less than {length}.\n     */\n    function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {\n        return _at(set._inner, index);\n    }\n\n    /**\n     * @dev Return the entire set in an array\n     *\n     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed\n     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that\n     * this function has an unbounded cost, and using it as part of a state-changing function may render the function\n     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.\n     */\n    function values(Bytes32Set storage set) internal view returns (bytes32[] memory) {\n        return _values(set._inner);\n    }\n\n    // AddressSet\n\n    struct AddressSet {\n        Set _inner;\n    }\n\n    /**\n     * @dev Add a value to a set. O(1).\n     *\n     * Returns true if the value was added to the set, that is if it was not\n     * already present.\n     */\n    function add(AddressSet storage set, address value) internal returns (bool) {\n        return _add(set._inner, bytes32(uint256(uint160(value))));\n    }\n\n    /**\n     * @dev Removes a value from a set. O(1).\n     *\n     * Returns true if the value was removed from the set, that is if it was\n     * present.\n     */\n    function remove(AddressSet storage set, address value) internal returns (bool) {\n        return _remove(set._inner, bytes32(uint256(uint160(value))));\n    }\n\n    /**\n     * @dev Returns true if the value is in the set. O(1).\n     */\n    function contains(AddressSet storage set, address value) internal view returns (bool) {\n        return _contains(set._inner, bytes32(uint256(uint160(value))));\n    }\n\n    /**\n     * @dev Returns the number of values in the set. O(1).\n     */\n    function length(AddressSet storage set) internal view returns (uint256) {\n        return _length(set._inner);\n    }\n\n    /**\n     * @dev Returns the value stored at position `index` in the set. O(1).\n     *\n     * Note that there are no guarantees on the ordering of values inside the\n     * array, and it may change when more values are added or removed.\n     *\n     * Requirements:\n     *\n     * - `index` must be strictly less than {length}.\n     */\n    function at(AddressSet storage set, uint256 index) internal view returns (address) {\n        return address(uint160(uint256(_at(set._inner, index))));\n    }\n\n    /**\n     * @dev Return the entire set in an array\n     *\n     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed\n     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that\n     * this function has an unbounded cost, and using it as part of a state-changing function may render the function\n     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.\n     */\n    function values(AddressSet storage set) internal view returns (address[] memory) {\n        bytes32[] memory store = _values(set._inner);\n        address[] memory result;\n\n        assembly {\n            result := store\n        }\n\n        return result;\n    }\n\n    // UintSet\n\n    struct UintSet {\n        Set _inner;\n    }\n\n    /**\n     * @dev Add a value to a set. O(1).\n     *\n     * Returns true if the value was added to the set, that is if it was not\n     * already present.\n     */\n    function add(UintSet storage set, uint256 value) internal returns (bool) {\n        return _add(set._inner, bytes32(value));\n    }\n\n    /**\n     * @dev Removes a value from a set. O(1).\n     *\n     * Returns true if the value was removed from the set, that is if it was\n     * present.\n     */\n    function remove(UintSet storage set, uint256 value) internal returns (bool) {\n        return _remove(set._inner, bytes32(value));\n    }\n\n    /**\n     * @dev Returns true if the value is in the set. O(1).\n     */\n    function contains(UintSet storage set, uint256 value) internal view returns (bool) {\n        return _contains(set._inner, bytes32(value));\n    }\n\n    /**\n     * @dev Returns the number of values on the set. O(1).\n     */\n    function length(UintSet storage set) internal view returns (uint256) {\n        return _length(set._inner);\n    }\n\n    /**\n     * @dev Returns the value stored at position `index` in the set. O(1).\n     *\n     * Note that there are no guarantees on the ordering of values inside the\n     * array, and it may change when more values are added or removed.\n     *\n     * Requirements:\n     *\n     * - `index` must be strictly less than {length}.\n     */\n    function at(UintSet storage set, uint256 index) internal view returns (uint256) {\n        return uint256(_at(set._inner, index));\n    }\n\n    /**\n     * @dev Return the entire set in an array\n     *\n     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed\n     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that\n     * this function has an unbounded cost, and using it as part of a state-changing function may render the function\n     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.\n     */\n    function values(UintSet storage set) internal view returns (uint256[] memory) {\n        bytes32[] memory store = _values(set._inner);\n        uint256[] memory result;\n\n        assembly {\n            result := store\n        }\n\n        return result;\n    }\n}\n"
    },
    "@openzeppelin/contracts/access/Ownable.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../utils/Context.sol\";\n\n/**\n * @dev Contract module which provides a basic access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership}.\n *\n * This module is used through inheritance. It will make available the modifier\n * `onlyOwner`, which can be applied to your functions to restrict their use to\n * the owner.\n */\nabstract contract Ownable is Context {\n    address private _owner;\n\n    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n    /**\n     * @dev Initializes the contract setting the deployer as the initial owner.\n     */\n    constructor() {\n        _transferOwnership(_msgSender());\n    }\n\n    /**\n     * @dev Returns the address of the current owner.\n     */\n    function owner() public view virtual returns (address) {\n        return _owner;\n    }\n\n    /**\n     * @dev Throws if called by any account other than the owner.\n     */\n    modifier onlyOwner() {\n        require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n        _;\n    }\n\n    /**\n     * @dev Leaves the contract without owner. It will not be possible to call\n     * `onlyOwner` functions anymore. Can only be called by the current owner.\n     *\n     * NOTE: Renouncing ownership will leave the contract without an owner,\n     * thereby removing any functionality that is only available to the owner.\n     */\n    function renounceOwnership() public virtual onlyOwner {\n        _transferOwnership(address(0));\n    }\n\n    /**\n     * @dev Transfers ownership of the contract to a new account (`newOwner`).\n     * Can only be called by the current owner.\n     */\n    function transferOwnership(address newOwner) public virtual onlyOwner {\n        require(newOwner != address(0), \"Ownable: new owner is the zero address\");\n        _transferOwnership(newOwner);\n    }\n\n    /**\n     * @dev Transfers ownership of the contract to a new account (`newOwner`).\n     * Internal function without access restriction.\n     */\n    function _transferOwnership(address newOwner) internal virtual {\n        address oldOwner = _owner;\n        _owner = newOwner;\n        emit OwnershipTransferred(oldOwner, newOwner);\n    }\n}\n"
    },
    "@openzeppelin/contracts/token/ERC20/IERC20.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Interface of the ERC20 standard as defined in the EIP.\n */\ninterface IERC20 {\n    /**\n     * @dev Emitted when `value` tokens are moved from one account (`from`) to\n     * another (`to`).\n     *\n     * Note that `value` may be zero.\n     */\n    event Transfer(address indexed from, address indexed to, uint256 value);\n\n    /**\n     * @dev Emitted when the allowance of a `spender` for an `owner` is set by\n     * a call to {approve}. `value` is the new allowance.\n     */\n    event Approval(address indexed owner, address indexed spender, uint256 value);\n\n    /**\n     * @dev Returns the amount of tokens in existence.\n     */\n    function totalSupply() external view returns (uint256);\n\n    /**\n     * @dev Returns the amount of tokens owned by `account`.\n     */\n    function balanceOf(address account) external view returns (uint256);\n\n    /**\n     * @dev Moves `amount` tokens from the caller's account to `to`.\n     *\n     * Returns a boolean value indicating whether the operation succeeded.\n     *\n     * Emits a {Transfer} event.\n     */\n    function transfer(address to, uint256 amount) external returns (bool);\n\n    /**\n     * @dev Returns the remaining number of tokens that `spender` will be\n     * allowed to spend on behalf of `owner` through {transferFrom}. This is\n     * zero by default.\n     *\n     * This value changes when {approve} or {transferFrom} are called.\n     */\n    function allowance(address owner, address spender) external view returns (uint256);\n\n    /**\n     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.\n     *\n     * Returns a boolean value indicating whether the operation succeeded.\n     *\n     * IMPORTANT: Beware that changing an allowance with this method brings the risk\n     * that someone may use both the old and the new allowance by unfortunate\n     * transaction ordering. One possible solution to mitigate this race\n     * condition is to first reduce the spender's allowance to 0 and set the\n     * desired value afterwards:\n     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729\n     *\n     * Emits an {Approval} event.\n     */\n    function approve(address spender, uint256 amount) external returns (bool);\n\n    /**\n     * @dev Moves `amount` tokens from `from` to `to` using the\n     * allowance mechanism. `amount` is then deducted from the caller's\n     * allowance.\n     *\n     * Returns a boolean value indicating whether the operation succeeded.\n     *\n     * Emits a {Transfer} event.\n     */\n    function transferFrom(\n        address from,\n        address to,\n        uint256 amount\n    ) external returns (bool);\n}\n"
    },
    "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../IERC20.sol\";\n\n/**\n * @dev Interface for the optional metadata functions from the ERC20 standard.\n *\n * _Available since v4.1._\n */\ninterface IERC20Metadata is IERC20 {\n    /**\n     * @dev Returns the name of the token.\n     */\n    function name() external view returns (string memory);\n\n    /**\n     * @dev Returns the symbol of the token.\n     */\n    function symbol() external view returns (string memory);\n\n    /**\n     * @dev Returns the decimals places of the token.\n     */\n    function decimals() external view returns (uint8);\n}\n"
    },
    "@openzeppelin/contracts/utils/Context.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Provides information about the current execution context, including the\n * sender of the transaction and its data. While these are generally available\n * via msg.sender and msg.data, they should not be accessed in such a direct\n * manner, since when dealing with meta-transactions the account sending and\n * paying for execution may not be the actual sender (as far as an application\n * is concerned).\n *\n * This contract is only required for intermediate, library-like contracts.\n */\nabstract contract Context {\n    function _msgSender() internal view virtual returns (address) {\n        return msg.sender;\n    }\n\n    function _msgData() internal view virtual returns (bytes calldata) {\n        return msg.data;\n    }\n}\n"
    },
    "contracts/interfaces/IHelixToken.sol": {
      "content": "// SPDX-License-Identifier: MIT\npragma solidity >= 0.8.0;\n\ninterface IHelixToken {\n    function mint(address to, uint256 amount) external returns(bool);\n    function transfer(address recipient, uint256 amount) external returns(bool);\n    function balanceOf(address account) external view returns (uint256);\n}\n"
    },
    "@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\npragma solidity ^0.8.0;\nimport \"../proxy/utils/Initializable.sol\";\n\n/**\n * @dev Provides information about the current execution context, including the\n * sender of the transaction and its data. While these are generally available\n * via msg.sender and msg.data, they should not be accessed in such a direct\n * manner, since when dealing with meta-transactions the account sending and\n * paying for execution may not be the actual sender (as far as an application\n * is concerned).\n *\n * This contract is only required for intermediate, library-like contracts.\n */\nabstract contract ContextUpgradeable is Initializable {\n    function __Context_init() internal onlyInitializing {\n    }\n\n    function __Context_init_unchained() internal onlyInitializing {\n    }\n    function _msgSender() internal view virtual returns (address) {\n        return msg.sender;\n    }\n\n    function _msgData() internal view virtual returns (bytes calldata) {\n        return msg.data;\n    }\n\n    /**\n     * @dev This empty reserved space is put in place to allow future versions to add new\n     * variables without shifting down storage in the inheritance chain.\n     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n     */\n    uint256[50] private __gap;\n}\n"
    },
    "@openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)\n\npragma solidity ^0.8.1;\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary AddressUpgradeable {\n    /**\n     * @dev Returns true if `account` is a contract.\n     *\n     * [IMPORTANT]\n     * ====\n     * It is unsafe to assume that an address for which this function returns\n     * false is an externally-owned account (EOA) and not a contract.\n     *\n     * Among others, `isContract` will return false for the following\n     * types of addresses:\n     *\n     *  - an externally-owned account\n     *  - a contract in construction\n     *  - an address where a contract will be created\n     *  - an address where a contract lived, but was destroyed\n     * ====\n     *\n     * [IMPORTANT]\n     * ====\n     * You shouldn't rely on `isContract` to protect against flash loan attacks!\n     *\n     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets\n     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract\n     * constructor.\n     * ====\n     */\n    function isContract(address account) internal view returns (bool) {\n        // This method relies on extcodesize/address.code.length, which returns 0\n        // for contracts in construction, since the code is only stored at the end\n        // of the constructor execution.\n\n        return account.code.length > 0;\n    }\n\n    /**\n     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to\n     * `recipient`, forwarding all available gas and reverting on errors.\n     *\n     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n     * of certain opcodes, possibly making contracts go over the 2300 gas limit\n     * imposed by `transfer`, making them unable to receive funds via\n     * `transfer`. {sendValue} removes this limitation.\n     *\n     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n     *\n     * IMPORTANT: because control is transferred to `recipient`, care must be\n     * taken to not create reentrancy vulnerabilities. Consider using\n     * {ReentrancyGuard} or the\n     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n     */\n    function sendValue(address payable recipient, uint256 amount) internal {\n        require(address(this).balance >= amount, \"Address: insufficient balance\");\n\n        (bool success, ) = recipient.call{value: amount}(\"\");\n        require(success, \"Address: unable to send value, recipient may have reverted\");\n    }\n\n    /**\n     * @dev Performs a Solidity function call using a low level `call`. A\n     * plain `call` is an unsafe replacement for a function call: use this\n     * function instead.\n     *\n     * If `target` reverts with a revert reason, it is bubbled up by this\n     * function (like regular Solidity function calls).\n     *\n     * Returns the raw returned data. To convert to the expected return value,\n     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n     *\n     * Requirements:\n     *\n     * - `target` must be a contract.\n     * - calling `target` with `data` must not revert.\n     *\n     * _Available since v3.1._\n     */\n    function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n        return functionCall(target, data, \"Address: low-level call failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\n     * `errorMessage` as a fallback revert reason when `target` reverts.\n     *\n     * _Available since v3.1._\n     */\n    function functionCall(\n        address target,\n        bytes memory data,\n        string memory errorMessage\n    ) internal returns (bytes memory) {\n        return functionCallWithValue(target, data, 0, errorMessage);\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n     * but also transferring `value` wei to `target`.\n     *\n     * Requirements:\n     *\n     * - the calling contract must have an ETH balance of at least `value`.\n     * - the called Solidity function must be `payable`.\n     *\n     * _Available since v3.1._\n     */\n    function functionCallWithValue(\n        address target,\n        bytes memory data,\n        uint256 value\n    ) internal returns (bytes memory) {\n        return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n     * with `errorMessage` as a fallback revert reason when `target` reverts.\n     *\n     * _Available since v3.1._\n     */\n    function functionCallWithValue(\n        address target,\n        bytes memory data,\n        uint256 value,\n        string memory errorMessage\n    ) internal returns (bytes memory) {\n        require(address(this).balance >= value, \"Address: insufficient balance for call\");\n        require(isContract(target), \"Address: call to non-contract\");\n\n        (bool success, bytes memory returndata) = target.call{value: value}(data);\n        return verifyCallResult(success, returndata, errorMessage);\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n     * but performing a static call.\n     *\n     * _Available since v3.3._\n     */\n    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {\n        return functionStaticCall(target, data, \"Address: low-level static call failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n     * but performing a static call.\n     *\n     * _Available since v3.3._\n     */\n    function functionStaticCall(\n        address target,\n        bytes memory data,\n        string memory errorMessage\n    ) internal view returns (bytes memory) {\n        require(isContract(target), \"Address: static call to non-contract\");\n\n        (bool success, bytes memory returndata) = target.staticcall(data);\n        return verifyCallResult(success, returndata, errorMessage);\n    }\n\n    /**\n     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the\n     * revert reason using the provided one.\n     *\n     * _Available since v4.3._\n     */\n    function verifyCallResult(\n        bool success,\n        bytes memory returndata,\n        string memory errorMessage\n    ) internal pure returns (bytes memory) {\n        if (success) {\n            return returndata;\n        } else {\n            // Look for revert reason and bubble it up if present\n            if (returndata.length > 0) {\n                // The easiest way to bubble the revert reason is using memory via assembly\n\n                assembly {\n                    let returndata_size := mload(returndata)\n                    revert(add(32, returndata), returndata_size)\n                }\n            } else {\n                revert(errorMessage);\n            }\n        }\n    }\n}\n"
    }
  },
  "settings": {
    "optimizer": {
      "enabled": true,
      "runs": 200
    },
    "outputSelection": {
      "*": {
        "*": [
          "evm.bytecode",
          "evm.deployedBytecode",
          "devdoc",
          "userdoc",
          "metadata",
          "abi"
        ]
      }
    },
    "libraries": {}
  }
}