Contract 0x627a83b6f8743c89d58f17f994d3f7f69c32f461 1

Txn Hash Method
Block
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Value [Txn Fee]
0xbeab5e01b366ad4187284f1960402f62cdf1c719e71e65527c8fb06a04d668f0Claim Reward288160942022-01-23 11:49:0143 secs ago0x197e520f981c3722ce67b5dd58661a3808e7ac17 IN  0x627a83b6f8743c89d58f17f994d3f7f69c32f4610 FTM0.04910690854
0x0a98e665a67aeda7c8789add3b1538ce71547412c579f4448af1519861970e40Stake288160512022-01-23 11:48:171 min ago0x02ae1c8bfd8f2e7d0452dd2fcdbbd711ff92d321 IN  0x627a83b6f8743c89d58f17f994d3f7f69c32f4610 FTM0.062336646086
0x466c51679a2619426e2e2c934f09e713fbb17beb9bc0e6b712fb3643cf9d1763Stake288160492022-01-23 11:48:151 min ago0x5b17cce191a36290667b507c62688f1394ae1073 IN  0x627a83b6f8743c89d58f17f994d3f7f69c32f4610 FTM0.064601936817
0x45ded9e2f73de27d5736521006b310e11dbcc62e2b0f6f4861692519ce55f3caStake288160432022-01-23 11:48:081 min ago0xe4988c2dcb4999f954d353f4d1ebf0dd289800bb IN  0x627a83b6f8743c89d58f17f994d3f7f69c32f4610 FTM0.075615875244
0x7f8bc40ddf6b7df782b2806208bc5768cefa7b4028a9d3690b0a84316bf1f03aStake288160192022-01-23 11:47:451 min ago0xee4efa32e08a9628013eaa50ca9e98c8ffd3f919 IN  0x627a83b6f8743c89d58f17f994d3f7f69c32f4610 FTM0.066487014172
0x34e1cac5fa5596bafe683486552dbb44df9ac7f55682859a7962ba3ce8fe241aStake288160072022-01-23 11:47:342 mins ago0x6e5dbeaa7350be75a099a430511ec2b907f327c5 IN  0x627a83b6f8743c89d58f17f994d3f7f69c32f4610 FTM0.06326493228
0x2f163f1090b1128b062256ddd51459c230728daa6d97f1445a8257a8a488929aWithdraw288159762022-01-23 11:46:582 mins ago0xae98e9a3ffc27cc40c9a032d715ad01907439432 IN  0x627a83b6f8743c89d58f17f994d3f7f69c32f4610 FTM0.069887594
0xe28b8dde093144939efcc67c683f0676eb20812d439c93c7571a7c77ea721c80Claim Reward288159672022-01-23 11:46:452 mins ago0x1c677f1b22dc7a93411faab27d5ddb5cd508bfd3 IN  0x627a83b6f8743c89d58f17f994d3f7f69c32f4610 FTM0.05005763928
0xacb781ff1d1fa65437a3d7844e64c0d6ad7cac66368fae1eee6d755c980326ceClaim Reward288159542022-01-23 11:46:243 mins ago0xf1d6da09c3cdb01d029979a685f9e7d86d0a9633 IN  0x627a83b6f8743c89d58f17f994d3f7f69c32f4610 FTM0.02530230907
0xe8d68634e47de48fff4d9d4e6dc3e58db8ad955d6f4e26481187b3d3041935bcClaim Reward288159542022-01-23 11:46:243 mins ago0xf1d6da09c3cdb01d029979a685f9e7d86d0a9633 IN  0x627a83b6f8743c89d58f17f994d3f7f69c32f4610 FTM0.037052376787
0x8381f20b2c243382d47d0390f622260137bea1c91e7b86f169918c443729a622Stake288159482022-01-23 11:46:143 mins ago0xe886ec9756fb39ee1186844528a819ccbaee530a IN  0x627a83b6f8743c89d58f17f994d3f7f69c32f4610 FTM0.07075304112
0xaa320a2b65e025ea78dcf588f5049cec27ecd2ba393e3be1da1d7c5bbe2e80deStake288159302022-01-23 11:45:563 mins ago0x492ee29b7bf29dcae48a37cde757d09cb3be6d00 IN  0x627a83b6f8743c89d58f17f994d3f7f69c32f4610 FTM0.058197688185
0xa2072ac1b24dfde788469adbbebb28ccac180fd7e95bbf311c44e86157c23e0eStake288159192022-01-23 11:45:453 mins ago0x3e1f9951809428522cb19be02c880a943f56a19f IN  0x627a83b6f8743c89d58f17f994d3f7f69c32f4610 FTM0.070358016726
0x65e706811807157b3806ee2e0ab7269976ecdaf49c92863a7e7ddd423a111dddStake288159152022-01-23 11:45:424 mins ago0x656e6fb1392fe5d5ce5f5e4e34ae4c5680a335ac IN  0x627a83b6f8743c89d58f17f994d3f7f69c32f4610 FTM0.070421507779
0xb865850dead430bb3e101e5b6dc396e3782154140e3433d05603402f8fc37beeExit288159112022-01-23 11:45:374 mins ago0xaedaf66a1fa1fbc09a601ed08aa177940330678d IN  0x627a83b6f8743c89d58f17f994d3f7f69c32f4610 FTM0.05941411927
0x4da4b3f0a6a3974c8d7ee0442069a36e761cd837f99810c683ec5bea60c29f70Stake288159002022-01-23 11:45:264 mins ago0x75201bc9761b476af909a3f35f2649679352c281 IN  0x627a83b6f8743c89d58f17f994d3f7f69c32f4610 FTM0.057932028187
0xb40fcac202000cb9ab54a8315fa99d97dd7d0467250247cc80fbcc77dc7fba22Claim Reward288158532022-01-23 11:44:385 mins ago0x6e5dbeaa7350be75a099a430511ec2b907f327c5 IN  0x627a83b6f8743c89d58f17f994d3f7f69c32f4610 FTM0.05485561678
0x8c043ed4f7f0dcae30cff956e82a68276c43ec3571f346e95f4b7f1069542bf3Claim Reward288158242022-01-23 11:44:085 mins ago0x5ed6346d22b9739f01772555d4694649fa813b6a IN  0x627a83b6f8743c89d58f17f994d3f7f69c32f4610 FTM0.035992708204
0xd1fcfb5099d393092046f53b7dc442d6c8497bc96c3f6c62e1e9c2d7d799984dClaim Reward288157902022-01-23 11:43:366 mins ago0x3f8581c89890f8117ee202b54f9253b9969a2357 IN  0x627a83b6f8743c89d58f17f994d3f7f69c32f4610 FTM0.053238987806
0x3bb82f959067e6b5ef342efae15bd46e4f14f27c0583e7c19d0b1fb9a2444cb3Stake288157742022-01-23 11:43:216 mins ago0x15b13d1b504c18fe04ef77b80f6b2f08d9e98258 IN  0x627a83b6f8743c89d58f17f994d3f7f69c32f4610 FTM0.054967823126
0x7dbda35685248f6f37b53fa0338d4479243de5d5082ca7871880b138127fee2bStake288157662022-01-23 11:43:136 mins ago0x01dd5d5d0b0bb5bf8dbf7e6d6d8a711578534a58 IN  0x627a83b6f8743c89d58f17f994d3f7f69c32f4610 FTM0.072794385081
0x3ab9874a81299eb059efeb0b56cd1124d7176de3c9a008e5983477e980ab0fc6Stake288157632022-01-23 11:43:116 mins ago0x019b1e3e2bddd9aa7f68c9601ced6e470d7a3be5 IN  0x627a83b6f8743c89d58f17f994d3f7f69c32f4610 FTM0.062971790212
0x8411532f84a2627677edd3fe9b7fe13af6e222652f0da1a655d11f38728c679dClaim Reward288157612022-01-23 11:43:086 mins ago0x9ca6fcc5c8b86bc76dd5268d138deb267673a137 IN  0x627a83b6f8743c89d58f17f994d3f7f69c32f4610 FTM0.045841672008
0x0e460a2341dd91be80789ad38819a0587dd7bf6370bce7a43b73936dc31ba565Exit288157562022-01-23 11:43:046 mins ago0xdcc0165ca7d67974c37a9009451a1aae6f736b97 IN  0x627a83b6f8743c89d58f17f994d3f7f69c32f4610 FTM0.017560537522
0xa98952a503a4792ff88b960c788f6379628709426855a85cf5f682ba0b1d8c0eStake288157402022-01-23 11:42:466 mins ago0xef98df5deaebb8f16ded5af3ac97aae76eceaee0 IN  0x627a83b6f8743c89d58f17f994d3f7f69c32f4610 FTM0.034911137372
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0x12f45e702982c291383e882dca4f4b9868fbe55b3c8f4f230579de8b3c698756270219782022-01-05 2:19:1518 days 9 hrs ago 0xa7d35c2e42536da020929b822494f05c113b32b9  Contract Creation0 FTM
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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
File 1 of 8 : Masonry.sol
// SPDX-License-Identifier: MIT

pragma solidity 0.6.12;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";

import "./utils/ContractGuard.sol";
import "./interfaces/IBasisAsset.sol";
import "./interfaces/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);
    }
}

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 tomb;
    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 _tomb,
        IERC20 _share,
        ITreasury _treasury
    ) public notInitialized {
        tomb = _tomb;
        share = _share;
        treasury = _treasury;

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

        withdrawLockupEpochs = 2; // Lock for 6 epochs (36h) before release withdraw
        rewardLockupEpochs = 1; // Lock for 3 epochs (18h) before release claimReward TOMB ON STEROIDS

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

    // =========== 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;
            tomb.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);

        tomb.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(tomb), "tomb");
        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 "../../math/SafeMath.sol";
import "../../utils/Address.sol";

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

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

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

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

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

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

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

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

File 4 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 5 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 6 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 getTombPrice() external view returns (uint256);

    function buyBonds(uint256 amount, uint256 targetPrice) external;

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

File 7 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 8 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);
            }
        }
    }
}

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

Contract Security Audit

Contract ABI

[{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"executor","type":"address"},{"indexed":false,"internalType":"uint256","name":"at","type":"uint256"}],"name":"Initialized","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"reward","type":"uint256"}],"name":"RewardAdded","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"reward","type":"uint256"}],"name":"RewardPaid","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Staked","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Withdrawn","type":"event"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"allocateSeigniorage","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"mason","type":"address"}],"name":"canClaimReward","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"mason","type":"address"}],"name":"canWithdraw","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"claimReward","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"mason","type":"address"}],"name":"earned","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"epoch","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"exit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"mason","type":"address"}],"name":"getLastSnapshotIndexOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getTombPrice","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"contract IERC20","name":"_token","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"},{"internalType":"address","name":"_to","type":"address"}],"name":"governanceRecoverUnsupported","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract IERC20","name":"_tomb","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":"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":"tomb","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","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
Age Block Fee Address BC Fee Address Voting Power Jailed Incoming
Validator ID :
0 FTM

Amount Staked
0

Amount Delegated
0

Staking Total
0

Staking Start Epoch
0

Staking Start Time
0

Proof of Importance
0

Origination Score
0

Validation Score
0

Active
0

Online
0

Downtime
0 s
Address Amount claimed Rewards Created On Epoch Created On
Block Uncle Number Difficulty Gas Used Reward
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