Contract 0xA452f676F109d34665877B7a7B203f2B445D7DE0

Contract Overview

Polaris Finance: Polar Sunrise
Balance:
0 ETH

ETH Value:
$0.00

Token:
Txn Hash Method
Block
From
To
Value [Txn Fee]
0xf0fb838dfd5234b67dd87ed3519ac3a92bbbae3b221b346edd9b4598f88cebc8Stake750419972022-09-27 20:15:3719 hrs 31 mins ago0xd5c6161c96fbe5a8a5e17c25d1e1ebe808e9f7ab IN  Polaris Finance: Polar Sunrise0 ETH0
0xa2d9f089b0a3e495139e27bc608b3cabd723b6599152fbf7b1e9b113c15570d5Stake750334972022-09-27 17:27:3222 hrs 20 mins ago0x434e086f7cdbfeda6ffc62b616f626118a565e28 IN  Polaris Finance: Polar Sunrise0 ETH0
0x126fa8aa014dc3456f4c9967a0d4ad09bf53fbce79ae2174930b914bda655cb7Stake749698862022-09-26 20:12:001 day 19 hrs ago0xfa5c81bb8c83a0eed6ec19dd1187ea67de27bed3 IN  Polaris Finance: Polar Sunrise0 ETH0.00000962661
0xbaa8ac971a581b007eb5d173c32f575e078c847369b3d19c391d563e1db754f5Stake749593292022-09-26 16:37:361 day 23 hrs ago0x6159d8e1eb7c46585ef929e3750ec3a320f1d346 IN  Polaris Finance: Polar Sunrise0 ETH0.00000781592
0x66d2eee3cee5ca227ba67955ed270566ca8dcbd2d2972ecc19b62eb7edbe30d3Stake749448912022-09-26 11:46:252 days 4 hrs ago0xb487e978beef2e098d917d6ce67006175c2e08d0 IN  Polaris Finance: Polar Sunrise0 ETH0.00000781676
0xa20c1afc303c10f1604bb6e5327b595c77bca46e081b595067d998f3e3f655b6Stake747904012022-09-24 7:34:004 days 8 hrs ago0x6159d8e1eb7c46585ef929e3750ec3a320f1d346 IN  Polaris Finance: Polar Sunrise0 ETH0.00001201977
0x8f2e83c1d8cb0b3d83039899b011af42321aca10627558b130885abc26da029aStake747507212022-09-23 17:55:224 days 21 hrs ago0x434e086f7cdbfeda6ffc62b616f626118a565e28 IN  Polaris Finance: Polar Sunrise0 ETH0
0xe75a7e39bb511925f82c9247ef0442bd24d77f7840c7ce101b3eb9f0eb0dcb3fStake744840192022-09-19 20:01:098 days 19 hrs ago0x434e086f7cdbfeda6ffc62b616f626118a565e28 IN  Polaris Finance: Polar Sunrise0 ETH0
0x22869e2b28f8757f735add813141395fb6a83aabc1901427032d20223c94d6c1Stake744185492022-09-18 20:33:569 days 19 hrs ago0xa6c23f3179f4786b9e49f7802090038bfecf6c22 IN  Polaris Finance: Polar Sunrise0 ETH0
0x5e555a41cd04de01539bdc5cfa51fac0169c64375076d2fc8e0901be10c6c3ecStake742586142022-09-16 10:39:1912 days 5 hrs ago0x434e086f7cdbfeda6ffc62b616f626118a565e28 IN  Polaris Finance: Polar Sunrise0 ETH0
0x43ded19713eaf2532b705a7a48541aa2861c9719a5e1d74d3540823308ddf540Exit741435002022-09-14 15:50:0313 days 23 hrs ago0xd483cb1c29608ecc1d72baca26f159961d19c679 IN  Polaris Finance: Polar Sunrise0 ETH0.00000619728
0xd0684bbd68c10931e060fee4964000224b043abb1da14571e82d9b8fc4d84652Stake741409582022-09-14 14:56:4014 days 50 mins ago0x3b39802eb554db19fb29d32fd49709b519a918f6 IN  Polaris Finance: Polar Sunrise0 ETH0.00000781592
0xeae5d434dd7067a762dbdb820e157ee7b2dfcd1e1517c3d9fb63a688add1c69fStake741321822022-09-14 11:45:2214 days 4 hrs ago0x434e086f7cdbfeda6ffc62b616f626118a565e28 IN  Polaris Finance: Polar Sunrise0 ETH0
0xf8ff8c28671c3af6f42c37496b708b5910dc7e2cf4e7cd5c4172134a8fcb2171Stake741247442022-09-14 8:51:4114 days 6 hrs ago0xb487e978beef2e098d917d6ce67006175c2e08d0 IN  Polaris Finance: Polar Sunrise0 ETH0.00000781676
0x0775f681c0039744ca1d755bbc17a4039f756704ff8d48993e3c25c9587fececStake740834862022-09-13 17:21:5614 days 22 hrs ago0x434e086f7cdbfeda6ffc62b616f626118a565e28 IN  Polaris Finance: Polar Sunrise0 ETH0
0x64cc3a0e89eff78dbf5f53b0d0b1878f56598c7c8893237c488e730e1444d0a5Claim Reward740436722022-09-13 2:49:3615 days 12 hrs ago0x0a25c91209a158d0a4922837cdd590ace0d13f0d IN  Polaris Finance: Polar Sunrise0 ETH0.00000517944
0xd94bc8adbd0302537ce192e651a3dda027fbdf58287489c1520a6cb10b748648Stake739485282022-09-11 17:21:3116 days 22 hrs ago0x0637abf6cfbec71e9a285dbd0022c17573c983b5 IN  Polaris Finance: Polar Sunrise0 ETH0.00000781592
0x33f0f525e86307878f26143d8678db7caaeae06909eeffe5c387f83f9385a0ccStake739289632022-09-11 10:28:5117 days 5 hrs ago0x434e086f7cdbfeda6ffc62b616f626118a565e28 IN  Polaris Finance: Polar Sunrise0 ETH0
0xc92845cde6b37af84865c3ae635c5eb3edd8a5f899da990cff7380cabd0546d6Stake738240642022-09-09 20:53:4818 days 18 hrs ago0x5e6deb158a56840f0204bc3035be4fdbceb2d1e4 IN  Polaris Finance: Polar Sunrise0 ETH0.00000781508
0xbc9abff5a64c13a93326c4362257af6d9734eaff5ab5ff423f6fad2421deadf5Stake738079842022-09-09 15:00:4919 days 46 mins ago0x434e086f7cdbfeda6ffc62b616f626118a565e28 IN  Polaris Finance: Polar Sunrise0 ETH0
0x8f2f2e4e1a095c80c589821fd2dce0cb904c382640eb441280c3c87dae9af094Exit737738392022-09-09 2:38:0319 days 13 hrs ago0x842b3d0e7a91dc0078873dbc1c29f6e7ff585118 IN  Polaris Finance: Polar Sunrise0 ETH0.00000723016
0x975d12f18911f4f7754c1b64a22ac29f61073cf5668b3df62f377b013fc99b5fStake736548432022-09-07 7:55:0821 days 7 hrs ago0x434e086f7cdbfeda6ffc62b616f626118a565e28 IN  Polaris Finance: Polar Sunrise0 ETH0
0x9b142ff51b50a4e5356255988bb1804d9459c7fd1ff06f3c612b54c9798cf33bStake736079752022-09-06 14:48:3222 days 59 mins ago0xb487e978beef2e098d917d6ce67006175c2e08d0 IN  Polaris Finance: Polar Sunrise0 ETH0.00000862876
0xb4b5a6166de168815b1cf9725f58152ca5c1ccc6be9c64fda42603e8224f09d4Stake735551212022-09-05 20:32:2422 days 19 hrs ago0x434e086f7cdbfeda6ffc62b616f626118a565e28 IN  Polaris Finance: Polar Sunrise0 ETH0
0x137b6f423474a1a9250de169a9a329c453b15bd9ee365f6be699b8f744aae897Stake735547342022-09-05 20:24:3022 days 19 hrs ago0x1d4e027c56f870c27c660c4a201735afb142b924 IN  Polaris Finance: Polar Sunrise0 ETH0.00000781676
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Contract Source Code Verified (Exact Match)

Contract Name:
Masonry

Compiler Version
v0.6.12+commit.27d51765

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion, MIT license
File 1 of 8 : Masonry.sol
// SPDX-License-Identifier: MIT

pragma solidity 0.6.12;

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

import "ContractGuard.sol";
import "IBasisAsset.sol";
import "ITreasury.sol";

contract ShareWrapper {
    using SafeMath for uint256;
    using SafeERC20 for IERC20;

    IERC20 public share;

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

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

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

    function stake(uint256 amount) public virtual {
        _totalSupply = _totalSupply.add(amount);
        _balances[msg.sender] = _balances[msg.sender].add(amount);
        share.safeTransferFrom(msg.sender, address(this), amount);
    }

    function withdraw(uint256 amount) public virtual {
        uint256 masonShare = _balances[msg.sender];
        require(masonShare >= amount, "Masonry: withdraw request greater than staked amount");
        _totalSupply = _totalSupply.sub(amount);
        _balances[msg.sender] = masonShare.sub(amount);
        share.safeTransfer(msg.sender, amount);
    }
}

/*
    ____        __           _         _______
   / __ \____  / /___ ______(_)____   / ____(_)___  ____ _____  ________
  / /_/ / __ \/ / __ `/ ___/ / ___/  / /_  / / __ \/ __ `/ __ \/ ___/ _ \
 / ____/ /_/ / / /_/ / /  / (__  )  / __/ / / / / / /_/ / / / / /__/  __/
/_/    \____/_/\__,_/_/  /_/____/  /_/   /_/_/ /_/\__,_/_/ /_/\___/\___/

    https://polarisfinance.io
*/
contract Masonry is ShareWrapper, ContractGuard {
    using SafeERC20 for IERC20;
    using Address for address;
    using SafeMath for uint256;

    /* ========== DATA STRUCTURES ========== */

    struct Masonseat {
        uint256 lastSnapshotIndex;
        uint256 rewardEarned;
        uint256 epochTimerStart;
    }

    struct MasonrySnapshot {
        uint256 time;
        uint256 rewardReceived;
        uint256 rewardPerShare;
    }

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

    // governance
    address public operator;

    // flags
    bool public initialized = false;

    IERC20 public polar;
    ITreasury public treasury;

    mapping(address => Masonseat) public masons;
    MasonrySnapshot[] public masonryHistory;

    uint256 public withdrawLockupEpochs;
    uint256 public rewardLockupEpochs;

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

    event Initialized(address indexed executor, uint256 at);
    event Staked(address indexed user, uint256 amount);
    event Withdrawn(address indexed user, uint256 amount);
    event RewardPaid(address indexed user, uint256 reward);
    event RewardAdded(address indexed user, uint256 reward);

    /* ========== Modifiers =============== */

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

    modifier masonExists {
        require(balanceOf(msg.sender) > 0, "Masonry: The mason does not exist");
        _;
    }

    modifier updateReward(address mason) {
        if (mason != address(0)) {
            Masonseat memory seat = masons[mason];
            seat.rewardEarned = earned(mason);
            seat.lastSnapshotIndex = latestSnapshotIndex();
            masons[mason] = seat;
        }
        _;
    }

    modifier notInitialized {
        require(!initialized, "Masonry: already initialized");
        _;
    }

    /* ========== GOVERNANCE ========== */

    function initialize(
        IERC20 _polar,
        IERC20 _share,
        ITreasury _treasury
    ) public notInitialized {
        polar = _polar;
        share = _share;
        treasury = _treasury;

        MasonrySnapshot memory genesisSnapshot = MasonrySnapshot({time : block.number, rewardReceived : 0, rewardPerShare : 0});
        masonryHistory.push(genesisSnapshot);

        withdrawLockupEpochs = 6; // Lock for 6 epochs (36h) before release withdraw
        rewardLockupEpochs = 3; // Lock for 3 epochs (18h) before release claimReward

        initialized = true;
        operator = msg.sender;
        emit Initialized(msg.sender, block.number);
    }

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

    function setLockUp(uint256 _withdrawLockupEpochs, uint256 _rewardLockupEpochs) external onlyOperator {
        require(_withdrawLockupEpochs >= _rewardLockupEpochs && _withdrawLockupEpochs <= 56, "_withdrawLockupEpochs: out of range"); // <= 2 week
        withdrawLockupEpochs = _withdrawLockupEpochs;
        rewardLockupEpochs = _rewardLockupEpochs;
    }

    /* ========== VIEW FUNCTIONS ========== */

    // =========== Snapshot getters

    function latestSnapshotIndex() public view returns (uint256) {
        return masonryHistory.length.sub(1);
    }

    function getLatestSnapshot() internal view returns (MasonrySnapshot memory) {
        return masonryHistory[latestSnapshotIndex()];
    }

    function getLastSnapshotIndexOf(address mason) public view returns (uint256) {
        return masons[mason].lastSnapshotIndex;
    }

    function getLastSnapshotOf(address mason) internal view returns (MasonrySnapshot memory) {
        return masonryHistory[getLastSnapshotIndexOf(mason)];
    }

    function canWithdraw(address mason) external view returns (bool) {
        return masons[mason].epochTimerStart.add(withdrawLockupEpochs) <= treasury.epoch();
    }

    function canClaimReward(address mason) external view returns (bool) {
        return masons[mason].epochTimerStart.add(rewardLockupEpochs) <= treasury.epoch();
    }

    function epoch() external view returns (uint256) {
        return treasury.epoch();
    }

    function nextEpochPoint() external view returns (uint256) {
        return treasury.nextEpochPoint();
    }

    function getPolarPrice() external view returns (uint256) {
        return treasury.getPolarPrice();
    }

    // =========== Mason getters

    function rewardPerShare() public view returns (uint256) {
        return getLatestSnapshot().rewardPerShare;
    }

    function earned(address mason) public view returns (uint256) {
        uint256 latestRPS = getLatestSnapshot().rewardPerShare;
        uint256 storedRPS = getLastSnapshotOf(mason).rewardPerShare;

        return balanceOf(mason).mul(latestRPS.sub(storedRPS)).div(1e18).add(masons[mason].rewardEarned);
    }

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

    function stake(uint256 amount) public override onlyOneBlock updateReward(msg.sender) {
        require(amount > 0, "Masonry: Cannot stake 0");
        super.stake(amount);
        masons[msg.sender].epochTimerStart = treasury.epoch(); // reset timer
        emit Staked(msg.sender, amount);
    }

    function withdraw(uint256 amount) public override onlyOneBlock masonExists updateReward(msg.sender) {
        require(amount > 0, "Masonry: Cannot withdraw 0");
        require(masons[msg.sender].epochTimerStart.add(withdrawLockupEpochs) <= treasury.epoch(), "Masonry: still in withdraw lockup");
        claimReward();
        super.withdraw(amount);
        emit Withdrawn(msg.sender, amount);
    }

    function exit() external {
        withdraw(balanceOf(msg.sender));
    }

    function claimReward() public updateReward(msg.sender) {
        uint256 reward = masons[msg.sender].rewardEarned;
        if (reward > 0) {
            require(masons[msg.sender].epochTimerStart.add(rewardLockupEpochs) <= treasury.epoch(), "Masonry: still in reward lockup");
            masons[msg.sender].epochTimerStart = treasury.epoch(); // reset timer
            masons[msg.sender].rewardEarned = 0;
            polar.safeTransfer(msg.sender, reward);
            emit RewardPaid(msg.sender, reward);
        }
    }

    function allocateSeigniorage(uint256 amount) external onlyOneBlock onlyOperator {
        require(amount > 0, "Masonry: Cannot allocate 0");
        require(totalSupply() > 0, "Masonry: Cannot allocate when totalSupply is 0");

        // Create & add new snapshot
        uint256 prevRPS = getLatestSnapshot().rewardPerShare;
        uint256 nextRPS = prevRPS.add(amount.mul(1e18).div(totalSupply()));

        MasonrySnapshot memory newSnapshot = MasonrySnapshot({
            time: block.number,
            rewardReceived: amount,
            rewardPerShare: nextRPS
        });
        masonryHistory.push(newSnapshot);

        polar.safeTransferFrom(msg.sender, address(this), amount);
        emit RewardAdded(msg.sender, amount);
    }

    function governanceRecoverUnsupported(IERC20 _token, uint256 _amount, address _to) external onlyOperator {
        // do not allow to drain core tokens
        require(address(_token) != address(polar), "polar");
        require(address(_token) != address(share), "share");
        _token.safeTransfer(_to, _amount);
    }
}

File 2 of 8 : IERC20.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `sender` to `recipient` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

File 3 of 8 : SafeERC20.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

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

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using SafeMath for uint256;
    using Address for address;

    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(IERC20 token, address spender, uint256 value) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        // solhint-disable-next-line max-line-length
        require((value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 newAllowance = token.allowance(address(this), spender).add(value);
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        if (returndata.length > 0) { // Return data is optional
            // solhint-disable-next-line max-line-length
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

File 4 of 8 : SafeMath.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        uint256 c = a + b;
        if (c < a) return (false, 0);
        return (true, c);
    }

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

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

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

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

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

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

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

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b > 0, "SafeMath: division by zero");
        return a / b;
    }

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

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

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

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

File 5 of 8 : Address.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.2 <0.8.0;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

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

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (bool success, ) = recipient.call{ value: amount }("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

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

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

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");

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

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

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

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

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

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

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

    function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

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

File 6 of 8 : ContractGuard.sol
// SPDX-License-Identifier: MIT

pragma solidity 0.6.12;

contract ContractGuard {
    mapping(uint256 => mapping(address => bool)) private _status;

    function checkSameOriginReentranted() internal view returns (bool) {
        return _status[block.number][tx.origin];
    }

    function checkSameSenderReentranted() internal view returns (bool) {
        return _status[block.number][msg.sender];
    }

    modifier onlyOneBlock() {
        require(!checkSameOriginReentranted(), "ContractGuard: one block, one function");
        require(!checkSameSenderReentranted(), "ContractGuard: one block, one function");

        _;

        _status[block.number][tx.origin] = true;
        _status[block.number][msg.sender] = true;
    }
}

File 7 of 8 : IBasisAsset.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

interface IBasisAsset {
    function mint(address recipient, uint256 amount) external returns (bool);

    function burn(uint256 amount) external;

    function burnFrom(address from, uint256 amount) external;

    function isOperator() external returns (bool);

    function operator() external view returns (address);

    function transferOperator(address newOperator_) external;
}

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

pragma solidity 0.6.12;

interface ITreasury {
    function epoch() external view returns (uint256);

    function nextEpochPoint() external view returns (uint256);

    function getPolarPrice() external view returns (uint256);

    function buyBonds(uint256 amount, uint256 targetPrice) external;

    function redeemBonds(uint256 amount, uint256 targetPrice) external;
}

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

Contract ABI

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IERC20","name":"_token","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"},{"internalType":"address","name":"_to","type":"address"}],"name":"governanceRecoverUnsupported","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract IERC20","name":"_polar","type":"address"},{"internalType":"contract IERC20","name":"_share","type":"address"},{"internalType":"contract ITreasury","name":"_treasury","type":"address"}],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"initialized","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"latestSnapshotIndex","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"masonryHistory","outputs":[{"internalType":"uint256","name":"time","type":"uint256"},{"internalType":"uint256","name":"rewardReceived","type":"uint256"},{"internalType":"uint256","name":"rewardPerShare","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"masons","outputs":[{"internalType":"uint256","name":"lastSnapshotIndex","type":"uint256"},{"internalType":"uint256","name":"rewardEarned","type":"uint256"},{"internalType":"uint256","name":"epochTimerStart","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"nextEpochPoint","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"operator","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"polar","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"rewardLockupEpochs","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"rewardPerShare","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_withdrawLockupEpochs","type":"uint256"},{"internalType":"uint256","name":"_rewardLockupEpochs","type":"uint256"}],"name":"setLockUp","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_operator","type":"address"}],"name":"setOperator","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"share","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"stake","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"treasury","outputs":[{"internalType":"contract ITreasury","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"withdrawLockupEpochs","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"}]

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Block Transaction Gas Used Reward
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Block Uncle Number Difficulty Gas Used Reward
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