Contract 0x55530fa1b042582d5fa3c313a7e02d21af6b82f4

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0x46eb54cd5b8a052079b528d4f0b2099b7e2cf1807306f5e7721082f66a473ffcUpdate194097632021-10-18 10:44:499 days 14 hrs ago0xb339ac13d9dae79ab6cad15ec8903131099ceea5 IN  Tomb Finance: Oracle0 FTM0.009441634173
0x2d071e6c1cc4680853ed3aa784b2a76ef1024f98d38f7ed3f2493a1bd7242742Transfer Operato...194097392021-10-18 10:44:279 days 14 hrs ago0xb339ac13d9dae79ab6cad15ec8903131099ceea5 IN  Tomb Finance: Oracle0 FTM0.004166629508
0x4dd215f33a334c8b5ec8cb251946ec26a83baee7027ad456664c641c78a75c01Update193394092021-10-17 15:28:0710 days 9 hrs agoTomb Finance: Deployer IN  Tomb Finance: Oracle0 FTM0.013839287971
0x52b1f6dc258f276b68490b5b506febe19e3c571d37b5fdc55b1f7bc4388b0438Transfer Ownersh...189079662021-10-12 10:49:5915 days 14 hrs agoTomb Finance: Deployer IN  Tomb Finance: Oracle0 FTM0.008911174437
0x576fe66c83910cb2f577140eda011f356666f1421342bf15643f70ec9f55b1afUpdate161526742021-09-02 12:24:1755 days 12 hrs agoTomb Finance: Deployer IN  Tomb Finance: Oracle0 FTM0.00410988
0x05da643e8afa722cc72982db99a946396dba11cc086487441b33e7a81b58c324Update125585692021-07-21 0:35:1299 days 21 mins agoTomb Finance: Deployer IN  Tomb Finance: Oracle0 FTM0.03652035
0x3098341bae410e370f62b3576ccfca21fe36e28f8e78a0eb738dae987a213876Update125585342021-07-21 0:34:2799 days 21 mins agoTomb Finance: Deployer IN  Tomb Finance: Oracle0 FTM0.0365455
0xf42b7be7f04386fe92c1dca248101f7d1d8427a1b023e73c1cde257061e1d38bUpdate125577732021-07-21 0:20:1399 days 36 mins agoTomb Finance: Deployer IN  Tomb Finance: Oracle0 FTM0.0365455
0x7396cd19640832045d1ae83afb9275c62fc1ea98941b32cfc1353a6e4b5b2c63Update125572532021-07-21 0:10:1299 days 46 mins agoTomb Finance: Deployer IN  Tomb Finance: Oracle0 FTM0.03652035
0x16f1fc00ac8a23512404f01f517ea1ec3eac4e117cc824bafc9a9f06c93797fdUpdate125567302021-07-21 0:00:1599 days 56 mins agoTomb Finance: Deployer IN  Tomb Finance: Oracle0 FTM0.0365455
0xd14a6bad77d28623563814f9fddca464bdb539210f472a2f8a9c56edf5526e65Update125564862021-07-20 23:55:1199 days 1 hr agoTomb Finance: Deployer IN  Tomb Finance: Oracle0 FTM0.0365455
0x0ac48ac077991f3c89c945ef3995304236267c5bf21ebb9c35e9035349924e6cUpdate125562532021-07-20 23:50:0999 days 1 hr agoTomb Finance: Deployer IN  Tomb Finance: Oracle0 FTM0.0365455
0xe01f96b8c4616f11d1e40807514d42fedd1a18eb395b8a3ec603e4a860fad67cUpdate125560282021-07-20 23:45:1399 days 1 hr agoTomb Finance: Deployer IN  Tomb Finance: Oracle0 FTM0.0365455
0xe8acd6366e40fca8075bd0158725258b4f81d6d195cacb598733abc211be3f45Update125558112021-07-20 23:40:1299 days 1 hr agoTomb Finance: Deployer IN  Tomb Finance: Oracle0 FTM0.0365455
0xafbd2fead447d1780a2a1fa58a2847cd0203f5f620d19c591552b05f2e6dfccaUpdate125556092021-07-20 23:35:5499 days 1 hr agoTomb Finance: Deployer IN  Tomb Finance: Oracle0 FTM0.0365455
0x77d12b51db2c8afd6e2e1b44878355cc78df32939690dde4ecdbb3e5ab9b5c88Update125553642021-07-20 23:30:1299 days 1 hr agoTomb Finance: Deployer IN  Tomb Finance: Oracle0 FTM0.0365455
0x5587de7968d6434e24126bc52f1449a1fe2f5e58c7e3c336dd8aea2daecc0446Update125551202021-07-20 23:25:2499 days 1 hr agoTomb Finance: Deployer IN  Tomb Finance: Oracle0 FTM0.0365455
0x3a14e82eebc1de97cb806bff1fa5cc6e446fd1e89a4c6df1198aee84f0f9e4dcUpdate125548592021-07-20 23:20:1299 days 1 hr agoTomb Finance: Deployer IN  Tomb Finance: Oracle0 FTM0.0365455
0x5e61b2940c02dae17b49d17f1dbffd4d66a51a1a0c99741ccd869e0068589f52Update125545842021-07-20 23:15:1399 days 1 hr agoTomb Finance: Deployer IN  Tomb Finance: Oracle0 FTM0.0365455
0xa6a71923c21bb206804ee2860c586d9d61aa0433b5dbe755878fc1539c81cf62Update125542902021-07-20 23:10:1399 days 1 hr agoTomb Finance: Deployer IN  Tomb Finance: Oracle0 FTM0.03652035
0xa3fb2458589acb93b99979078cf853c47240064d7c796d56efc1185ca4657911Update125540232021-07-20 23:05:1299 days 1 hr agoTomb Finance: Deployer IN  Tomb Finance: Oracle0 FTM0.0365455
0x3d47aeb88c709e114937be3bdd5fa3ed7713f6aaa577e626d26e69724c99d7dcUpdate125537842021-07-20 23:00:1499 days 1 hr agoTomb Finance: Deployer IN  Tomb Finance: Oracle0 FTM0.0365455
0xbd508b35f6a92b33e0c55a811bd083e5a320d9cf3214f6045ccf286739e9fa43Update125535142021-07-20 22:55:1299 days 2 hrs agoTomb Finance: Deployer IN  Tomb Finance: Oracle0 FTM0.0365455
0x8b5a6788bda00be1ea1bbe40ec1188836b4a8efb7cbe574ff9e51c98180552b4Update125532662021-07-20 22:50:1299 days 2 hrs agoTomb Finance: Deployer IN  Tomb Finance: Oracle0 FTM0.0365455
0xdf33c37af99980247914d7544ea81c4c72c68d7dbef22fa78ce8dbfb093e279dUpdate125530322021-07-20 22:45:1399 days 2 hrs agoTomb Finance: Deployer IN  Tomb Finance: Oracle0 FTM0.0365455
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0xcd116118abc6c7cc823ee70c1582008f5f9cfe526710ba78c1662b8428fe77d383104222021-05-30 23:20:32150 days 1 hr ago Tomb Finance: Deployer  Contract Creation0 FTM
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Contract Source Code Verified (Exact Match)

Contract Name:
Oracle

Compiler Version
v0.6.12+commit.27d51765

Optimization Enabled:
Yes with 999999 runs

Other Settings:
default evmVersion

Contract Source Code (Solidity Standard Json-Input format)

File 1 of 11 : Oracle.sol
// SPDX-License-Identifier: MIT

pragma solidity 0.6.12;

import "@openzeppelin/contracts/math/SafeMath.sol";

import "./lib/Babylonian.sol";
import "./lib/FixedPoint.sol";
import "./lib/UniswapV2OracleLibrary.sol";
import "./utils/Epoch.sol";
import "./interfaces/IUniswapV2Pair.sol";

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

    http://tomb.finance
*/
// fixed window oracle that recomputes the average price for the entire period once every period
// note that the price average is only guaranteed to be over at least 1 period, but may be over a longer period
contract Oracle is Epoch {
    using FixedPoint for *;
    using SafeMath for uint256;

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

    // uniswap
    address public token0;
    address public token1;
    IUniswapV2Pair public pair;

    // oracle
    uint32 public blockTimestampLast;
    uint256 public price0CumulativeLast;
    uint256 public price1CumulativeLast;
    FixedPoint.uq112x112 public price0Average;
    FixedPoint.uq112x112 public price1Average;

    /* ========== CONSTRUCTOR ========== */

    constructor(
        IUniswapV2Pair _pair,
        uint256 _period,
        uint256 _startTime
    ) public Epoch(_period, _startTime, 0) {
        pair = _pair;
        token0 = pair.token0();
        token1 = pair.token1();
        price0CumulativeLast = pair.price0CumulativeLast(); // fetch the current accumulated price value (1 / 0)
        price1CumulativeLast = pair.price1CumulativeLast(); // fetch the current accumulated price value (0 / 1)
        uint112 reserve0;
        uint112 reserve1;
        (reserve0, reserve1, blockTimestampLast) = pair.getReserves();
        require(reserve0 != 0 && reserve1 != 0, "Oracle: NO_RESERVES"); // ensure that there's liquidity in the pair
    }

    /* ========== MUTABLE FUNCTIONS ========== */

    /** @dev Updates 1-day EMA price from Uniswap.  */
    function update() external checkEpoch {
        (uint256 price0Cumulative, uint256 price1Cumulative, uint32 blockTimestamp) = UniswapV2OracleLibrary.currentCumulativePrices(address(pair));
        uint32 timeElapsed = blockTimestamp - blockTimestampLast; // overflow is desired

        if (timeElapsed == 0) {
            // prevent divided by zero
            return;
        }

        // overflow is desired, casting never truncates
        // cumulative price is in (uq112x112 price * seconds) units so we simply wrap it after division by time elapsed
        price0Average = FixedPoint.uq112x112(uint224((price0Cumulative - price0CumulativeLast) / timeElapsed));
        price1Average = FixedPoint.uq112x112(uint224((price1Cumulative - price1CumulativeLast) / timeElapsed));

        price0CumulativeLast = price0Cumulative;
        price1CumulativeLast = price1Cumulative;
        blockTimestampLast = blockTimestamp;

        emit Updated(price0Cumulative, price1Cumulative);
    }

    // note this will always return 0 before update has been called successfully for the first time.
    function consult(address _token, uint256 _amountIn) external view returns (uint144 amountOut) {
        if (_token == token0) {
            amountOut = price0Average.mul(_amountIn).decode144();
        } else {
            require(_token == token1, "Oracle: INVALID_TOKEN");
            amountOut = price1Average.mul(_amountIn).decode144();
        }
    }

    function twap(address _token, uint256 _amountIn) external view returns (uint144 _amountOut) {
        (uint256 price0Cumulative, uint256 price1Cumulative, uint32 blockTimestamp) = UniswapV2OracleLibrary.currentCumulativePrices(address(pair));
        uint32 timeElapsed = blockTimestamp - blockTimestampLast; // overflow is desired
        if (_token == token0) {
            _amountOut = FixedPoint.uq112x112(uint224((price0Cumulative - price0CumulativeLast) / timeElapsed)).mul(_amountIn).decode144();
        } else if (_token == token1) {
            _amountOut = FixedPoint.uq112x112(uint224((price1Cumulative - price1CumulativeLast) / timeElapsed)).mul(_amountIn).decode144();
        }
    }

    event Updated(uint256 price0CumulativeLast, uint256 price1CumulativeLast);
}

File 2 of 11 : IUniswapV2Pair.sol
pragma solidity ^0.6.0;

interface IUniswapV2Pair {
    event Approval(address indexed owner, address indexed spender, uint256 value);
    event Transfer(address indexed from, address indexed to, uint256 value);

    function name() external pure returns (string memory);

    function symbol() external pure returns (string memory);

    function decimals() external pure returns (uint8);

    function totalSupply() external view returns (uint256);

    function balanceOf(address owner) external view returns (uint256);

    function allowance(address owner, address spender) external view returns (uint256);

    function approve(address spender, uint256 value) external returns (bool);

    function transfer(address to, uint256 value) external returns (bool);

    function transferFrom(
        address from,
        address to,
        uint256 value
    ) external returns (bool);

    function DOMAIN_SEPARATOR() external view returns (bytes32);

    function PERMIT_TYPEHASH() external pure returns (bytes32);

    function nonces(address owner) external view returns (uint256);

    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    event Mint(address indexed sender, uint256 amount0, uint256 amount1);
    event Burn(address indexed sender, uint256 amount0, uint256 amount1, address indexed to);
    event Swap(address indexed sender, uint256 amount0In, uint256 amount1In, uint256 amount0Out, uint256 amount1Out, address indexed to);
    event Sync(uint112 reserve0, uint112 reserve1);

    function MINIMUM_LIQUIDITY() external pure returns (uint256);

    function factory() external view returns (address);

    function token0() external view returns (address);

    function token1() external view returns (address);

    function getReserves()
        external
        view
        returns (
            uint112 reserve0,
            uint112 reserve1,
            uint32 blockTimestampLast
        );

    function price0CumulativeLast() external view returns (uint256);

    function price1CumulativeLast() external view returns (uint256);

    function kLast() external view returns (uint256);

    function mint(address to) external returns (uint256 liquidity);

    function burn(address to) external returns (uint256 amount0, uint256 amount1);

    function swap(
        uint256 amount0Out,
        uint256 amount1Out,
        address to,
        bytes calldata data
    ) external;

    function skim(address to) external;

    function sync() external;

    function initialize(address, address) external;
}

File 3 of 11 : Babylonian.sol
pragma solidity ^0.6.0;

library Babylonian {
    function sqrt(uint256 y) internal pure returns (uint256 z) {
        if (y > 3) {
            z = y;
            uint256 x = y / 2 + 1;
            while (x < z) {
                z = x;
                x = (y / x + x) / 2;
            }
        } else if (y != 0) {
            z = 1;
        }
        // else z = 0
    }
}

File 4 of 11 : FixedPoint.sol
pragma solidity ^0.6.0;

import "./Babylonian.sol";

// a library for handling binary fixed point numbers (https://en.wikipedia.org/wiki/Q_(number_format))
library FixedPoint {
    // range: [0, 2**112 - 1]
    // resolution: 1 / 2**112
    struct uq112x112 {
        uint224 _x;
    }

    // range: [0, 2**144 - 1]
    // resolution: 1 / 2**112
    struct uq144x112 {
        uint256 _x;
    }

    uint8 private constant RESOLUTION = 112;
    uint256 private constant Q112 = uint256(1) << RESOLUTION;
    uint256 private constant Q224 = Q112 << RESOLUTION;

    // encode a uint112 as a UQ112x112
    function encode(uint112 x) internal pure returns (uq112x112 memory) {
        return uq112x112(uint224(x) << RESOLUTION);
    }

    // encodes a uint144 as a UQ144x112
    function encode144(uint144 x) internal pure returns (uq144x112 memory) {
        return uq144x112(uint256(x) << RESOLUTION);
    }

    // divide a UQ112x112 by a uint112, returning a UQ112x112
    function div(uq112x112 memory self, uint112 x) internal pure returns (uq112x112 memory) {
        require(x != 0, "FixedPoint: DIV_BY_ZERO");
        return uq112x112(self._x / uint224(x));
    }

    // multiply a UQ112x112 by a uint, returning a UQ144x112
    // reverts on overflow
    function mul(uq112x112 memory self, uint256 y) internal pure returns (uq144x112 memory) {
        uint256 z;
        require(y == 0 || (z = uint256(self._x) * y) / y == uint256(self._x), "FixedPoint: MULTIPLICATION_OVERFLOW");
        return uq144x112(z);
    }

    // returns a UQ112x112 which represents the ratio of the numerator to the denominator
    // equivalent to encode(numerator).div(denominator)
    function fraction(uint112 numerator, uint112 denominator) internal pure returns (uq112x112 memory) {
        require(denominator > 0, "FixedPoint: DIV_BY_ZERO");
        return uq112x112((uint224(numerator) << RESOLUTION) / denominator);
    }

    // decode a UQ112x112 into a uint112 by truncating after the radix point
    function decode(uq112x112 memory self) internal pure returns (uint112) {
        return uint112(self._x >> RESOLUTION);
    }

    // decode a UQ144x112 into a uint144 by truncating after the radix point
    function decode144(uq144x112 memory self) internal pure returns (uint144) {
        return uint144(self._x >> RESOLUTION);
    }

    // take the reciprocal of a UQ112x112
    function reciprocal(uq112x112 memory self) internal pure returns (uq112x112 memory) {
        require(self._x != 0, "FixedPoint: ZERO_RECIPROCAL");
        return uq112x112(uint224(Q224 / self._x));
    }

    // square root of a UQ112x112
    function sqrt(uq112x112 memory self) internal pure returns (uq112x112 memory) {
        return uq112x112(uint224(Babylonian.sqrt(uint256(self._x)) << 56));
    }
}

File 5 of 11 : UniswapV2OracleLibrary.sol
pragma solidity ^0.6.0;

import "./FixedPoint.sol";
import "../interfaces/IUniswapV2Pair.sol";

// library with helper methods for oracles that are concerned with computing average prices
library UniswapV2OracleLibrary {
    using FixedPoint for *;

    // helper function that returns the current block timestamp within the range of uint32, i.e. [0, 2**32 - 1]
    function currentBlockTimestamp() internal view returns (uint32) {
        return uint32(block.timestamp % 2**32);
    }

    // produces the cumulative price using counterfactuals to save gas and avoid a call to sync.
    function currentCumulativePrices(address pair)
        internal
        view
        returns (
            uint256 price0Cumulative,
            uint256 price1Cumulative,
            uint32 blockTimestamp
        )
    {
        blockTimestamp = currentBlockTimestamp();
        price0Cumulative = IUniswapV2Pair(pair).price0CumulativeLast();
        price1Cumulative = IUniswapV2Pair(pair).price1CumulativeLast();

        // if time has elapsed since the last update on the pair, mock the accumulated price values
        (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast) = IUniswapV2Pair(pair).getReserves();
        if (blockTimestampLast != blockTimestamp) {
            // subtraction overflow is desired
            uint32 timeElapsed = blockTimestamp - blockTimestampLast;
            // addition overflow is desired
            // counterfactual
            price0Cumulative += uint256(FixedPoint.fraction(reserve1, reserve0)._x) * timeElapsed;
            // counterfactual
            price1Cumulative += uint256(FixedPoint.fraction(reserve0, reserve1)._x) * timeElapsed;
        }
    }
}

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

pragma solidity 0.6.12;

import "@openzeppelin/contracts/GSN/Context.sol";
import "@openzeppelin/contracts/access/Ownable.sol";

contract Operator is Context, Ownable {
    address private _operator;

    event OperatorTransferred(address indexed previousOperator, address indexed newOperator);

    constructor() internal {
        _operator = _msgSender();
        emit OperatorTransferred(address(0), _operator);
    }

    function operator() public view returns (address) {
        return _operator;
    }

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

    function isOperator() public view returns (bool) {
        return _msgSender() == _operator;
    }

    function transferOperator(address newOperator_) public onlyOwner {
        _transferOperator(newOperator_);
    }

    function _transferOperator(address newOperator_) internal {
        require(newOperator_ != address(0), "operator: zero address given for new operator");
        emit OperatorTransferred(address(0), newOperator_);
        _operator = newOperator_;
    }
}

File 7 of 11 : Epoch.sol
pragma solidity ^0.6.0;

import '@openzeppelin/contracts/math/SafeMath.sol';

import '../owner/Operator.sol';

contract Epoch is Operator {
    using SafeMath for uint256;

    uint256 private period;
    uint256 private startTime;
    uint256 private lastEpochTime;
    uint256 private epoch;

    /* ========== CONSTRUCTOR ========== */

    constructor(
        uint256 _period,
        uint256 _startTime,
        uint256 _startEpoch
    ) public {
        period = _period;
        startTime = _startTime;
        epoch = _startEpoch;
        lastEpochTime = startTime.sub(period);
    }

    /* ========== Modifier ========== */

    modifier checkStartTime {
        require(now >= startTime, 'Epoch: not started yet');

        _;
    }

    modifier checkEpoch {
        uint256 _nextEpochPoint = nextEpochPoint();
        if (now < _nextEpochPoint) {
            require(msg.sender == operator(), 'Epoch: only operator allowed for pre-epoch');
            _;
        } else {
            _;

            for (;;) {
                lastEpochTime = _nextEpochPoint;
                ++epoch;
                _nextEpochPoint = nextEpochPoint();
                if (now < _nextEpochPoint) break;
            }
        }
    }

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

    function getCurrentEpoch() public view returns (uint256) {
        return epoch;
    }

    function getPeriod() public view returns (uint256) {
        return period;
    }

    function getStartTime() public view returns (uint256) {
        return startTime;
    }

    function getLastEpochTime() public view returns (uint256) {
        return lastEpochTime;
    }

    function nextEpochPoint() public view returns (uint256) {
        return lastEpochTime.add(period);
    }

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

    function setPeriod(uint256 _period) external onlyOperator {
        require(_period >= 1 hours && _period <= 48 hours, '_period: out of range');
        period = _period;
    }

    function setEpoch(uint256 _epoch) external onlyOperator {
        epoch = _epoch;
    }
}

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

pragma solidity >=0.6.0 <0.8.0;

import "../utils/Context.sol";

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

pragma solidity >=0.6.0 <0.8.0;

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

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

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

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

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

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

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

File 10 of 11 : 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 11 of 11 : Context.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

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

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

Settings
{
  "remappings": [],
  "optimizer": {
    "enabled": true,
    "runs": 999999
  },
  "evmVersion": "istanbul",
  "libraries": {},
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  }
}

Contract Security Audit

Contract ABI

[{"inputs":[{"internalType":"contract IUniswapV2Pair","name":"_pair","type":"address"},{"internalType":"uint256","name":"_period","type":"uint256"},{"internalType":"uint256","name":"_startTime","type":"uint256"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOperator","type":"address"},{"indexed":true,"internalType":"address","name":"newOperator","type":"address"}],"name":"OperatorTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"price0CumulativeLast","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"price1CumulativeLast","type":"uint256"}],"name":"Updated","type":"event"},{"inputs":[],"name":"blockTimestampLast","outputs":[{"internalType":"uint32","name":"","type":"uint32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"},{"internalType":"uint256","name":"_amountIn","type":"uint256"}],"name":"consult","outputs":[{"internalType":"uint144","name":"amountOut","type":"uint144"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getCurrentEpoch","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getLastEpochTime","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getPeriod","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getStartTime","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"isOperator","outputs":[{"internalType":"bool","name":"","type":"bool"}],"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":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pair","outputs":[{"internalType":"contract IUniswapV2Pair","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"price0Average","outputs":[{"internalType":"uint224","name":"_x","type":"uint224"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"price0CumulativeLast","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"price1Average","outputs":[{"internalType":"uint224","name":"_x","type":"uint224"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"price1CumulativeLast","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_epoch","type":"uint256"}],"name":"setEpoch","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_period","type":"uint256"}],"name":"setPeriod","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"token0","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"token1","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOperator_","type":"address"}],"name":"transferOperator","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"},{"internalType":"uint256","name":"_amountIn","type":"uint256"}],"name":"twap","outputs":[{"internalType":"uint144","name":"_amountOut","type":"uint144"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"update","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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000000000000000054600000000000000000000000000000000000000000000000000000000060b779c8

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

0000000000000000000000002a651563c9d3af67ae0388a5c8f89b867038089e00000000000000000000000000000000000000000000000000000000000054600000000000000000000000000000000000000000000000000000000060b779c8

-----Decoded View---------------
Arg [0] : _pair (address): 0x2a651563c9d3af67ae0388a5c8f89b867038089e
Arg [1] : _period (uint256): 21600
Arg [2] : _startTime (uint256): 1622637000

-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 0000000000000000000000002a651563c9d3af67ae0388a5c8f89b867038089e
Arg [1] : 0000000000000000000000000000000000000000000000000000000000005460
Arg [2] : 0000000000000000000000000000000000000000000000000000000060b779c8


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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