Contract 0x72Fca528Ae8C3DA711a513Ac8A2CEF5AD03F8203

Contract Overview

Balance:
0 AVAX
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Block
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To
Value [Txn Fee]
0xc013537ea8053c303a32d72bc137d11f252fffce9516ae511c66bd46a69bc7930x6080604036596752021-12-17 17:58:00285 days 8 hrs ago0x878ecdd898336dccc076ce0e16dabbf8f507ab9d IN  Create: Oracle0 AVAX0.03262625 25
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0x9fa267315f3c01b930027ebee7b274e99cc606a3c8cd32b43548aee363c3e0fb41635592021-12-28 21:31:45274 days 5 hrs ago 0x4a90a56525257133d4dda089a78990d1b1d826200x72fca528ae8c3da711a513ac8a2cef5ad03f82030 AVAX
0x9fa267315f3c01b930027ebee7b274e99cc606a3c8cd32b43548aee363c3e0fb41635592021-12-28 21:31:45274 days 5 hrs ago 0x4a90a56525257133d4dda089a78990d1b1d826200x72fca528ae8c3da711a513ac8a2cef5ad03f82030 AVAX
0x9fa267315f3c01b930027ebee7b274e99cc606a3c8cd32b43548aee363c3e0fb41635592021-12-28 21:31:45274 days 5 hrs ago 0x72fca528ae8c3da711a513ac8a2cef5ad03f8203 0x3336300120b693c9d807d1c8e8cb8059594cfb8f0 AVAX
0x9fa267315f3c01b930027ebee7b274e99cc606a3c8cd32b43548aee363c3e0fb41635592021-12-28 21:31:45274 days 5 hrs ago 0x72fca528ae8c3da711a513ac8a2cef5ad03f8203 0x3336300120b693c9d807d1c8e8cb8059594cfb8f0 AVAX
0x9fa267315f3c01b930027ebee7b274e99cc606a3c8cd32b43548aee363c3e0fb41635592021-12-28 21:31:45274 days 5 hrs ago 0x72fca528ae8c3da711a513ac8a2cef5ad03f8203 0x3336300120b693c9d807d1c8e8cb8059594cfb8f0 AVAX
0x9fa267315f3c01b930027ebee7b274e99cc606a3c8cd32b43548aee363c3e0fb41635592021-12-28 21:31:45274 days 5 hrs ago 0x4a90a56525257133d4dda089a78990d1b1d826200x72fca528ae8c3da711a513ac8a2cef5ad03f82030 AVAX
0x4e82fae166b9b0cbdffb3ebc3beb639a929e9d64af19bdbdf1f32c3e2e05690041528572021-12-28 15:31:49274 days 11 hrs ago 0x4a90a56525257133d4dda089a78990d1b1d826200x72fca528ae8c3da711a513ac8a2cef5ad03f82030 AVAX
0x4e82fae166b9b0cbdffb3ebc3beb639a929e9d64af19bdbdf1f32c3e2e05690041528572021-12-28 15:31:49274 days 11 hrs ago 0x4a90a56525257133d4dda089a78990d1b1d826200x72fca528ae8c3da711a513ac8a2cef5ad03f82030 AVAX
0x4e82fae166b9b0cbdffb3ebc3beb639a929e9d64af19bdbdf1f32c3e2e05690041528572021-12-28 15:31:49274 days 11 hrs ago 0x72fca528ae8c3da711a513ac8a2cef5ad03f8203 0x3336300120b693c9d807d1c8e8cb8059594cfb8f0 AVAX
0x4e82fae166b9b0cbdffb3ebc3beb639a929e9d64af19bdbdf1f32c3e2e05690041528572021-12-28 15:31:49274 days 11 hrs ago 0x72fca528ae8c3da711a513ac8a2cef5ad03f8203 0x3336300120b693c9d807d1c8e8cb8059594cfb8f0 AVAX
0x4e82fae166b9b0cbdffb3ebc3beb639a929e9d64af19bdbdf1f32c3e2e05690041528572021-12-28 15:31:49274 days 11 hrs ago 0x72fca528ae8c3da711a513ac8a2cef5ad03f8203 0x3336300120b693c9d807d1c8e8cb8059594cfb8f0 AVAX
0x4e82fae166b9b0cbdffb3ebc3beb639a929e9d64af19bdbdf1f32c3e2e05690041528572021-12-28 15:31:49274 days 11 hrs ago 0x4a90a56525257133d4dda089a78990d1b1d826200x72fca528ae8c3da711a513ac8a2cef5ad03f82030 AVAX
0xf82822a732cdca7b62b1d0bcc0e06fe2d4745e10d513af95c873e3bcddc51eb441427362021-12-28 9:31:43274 days 17 hrs ago 0x4a90a56525257133d4dda089a78990d1b1d826200x72fca528ae8c3da711a513ac8a2cef5ad03f82030 AVAX
0xf82822a732cdca7b62b1d0bcc0e06fe2d4745e10d513af95c873e3bcddc51eb441427362021-12-28 9:31:43274 days 17 hrs ago 0x4a90a56525257133d4dda089a78990d1b1d826200x72fca528ae8c3da711a513ac8a2cef5ad03f82030 AVAX
0xf82822a732cdca7b62b1d0bcc0e06fe2d4745e10d513af95c873e3bcddc51eb441427362021-12-28 9:31:43274 days 17 hrs ago 0x72fca528ae8c3da711a513ac8a2cef5ad03f8203 0x3336300120b693c9d807d1c8e8cb8059594cfb8f0 AVAX
0xf82822a732cdca7b62b1d0bcc0e06fe2d4745e10d513af95c873e3bcddc51eb441427362021-12-28 9:31:43274 days 17 hrs ago 0x72fca528ae8c3da711a513ac8a2cef5ad03f8203 0x3336300120b693c9d807d1c8e8cb8059594cfb8f0 AVAX
0xf82822a732cdca7b62b1d0bcc0e06fe2d4745e10d513af95c873e3bcddc51eb441427362021-12-28 9:31:43274 days 17 hrs ago 0x72fca528ae8c3da711a513ac8a2cef5ad03f8203 0x3336300120b693c9d807d1c8e8cb8059594cfb8f0 AVAX
0xf82822a732cdca7b62b1d0bcc0e06fe2d4745e10d513af95c873e3bcddc51eb441427362021-12-28 9:31:43274 days 17 hrs ago 0x4a90a56525257133d4dda089a78990d1b1d826200x72fca528ae8c3da711a513ac8a2cef5ad03f82030 AVAX
0xe493cc5bfa46458515637a0fc24855394a3f349d100587a8631fb7e8c2ff78ee41326682021-12-28 3:31:42274 days 23 hrs ago 0x4a90a56525257133d4dda089a78990d1b1d826200x72fca528ae8c3da711a513ac8a2cef5ad03f82030 AVAX
0xe493cc5bfa46458515637a0fc24855394a3f349d100587a8631fb7e8c2ff78ee41326682021-12-28 3:31:42274 days 23 hrs ago 0x4a90a56525257133d4dda089a78990d1b1d826200x72fca528ae8c3da711a513ac8a2cef5ad03f82030 AVAX
0xe493cc5bfa46458515637a0fc24855394a3f349d100587a8631fb7e8c2ff78ee41326682021-12-28 3:31:42274 days 23 hrs ago 0x72fca528ae8c3da711a513ac8a2cef5ad03f8203 0x3336300120b693c9d807d1c8e8cb8059594cfb8f0 AVAX
0xe493cc5bfa46458515637a0fc24855394a3f349d100587a8631fb7e8c2ff78ee41326682021-12-28 3:31:42274 days 23 hrs ago 0x72fca528ae8c3da711a513ac8a2cef5ad03f8203 0x3336300120b693c9d807d1c8e8cb8059594cfb8f0 AVAX
0xe493cc5bfa46458515637a0fc24855394a3f349d100587a8631fb7e8c2ff78ee41326682021-12-28 3:31:42274 days 23 hrs ago 0x72fca528ae8c3da711a513ac8a2cef5ad03f8203 0x3336300120b693c9d807d1c8e8cb8059594cfb8f0 AVAX
0xe493cc5bfa46458515637a0fc24855394a3f349d100587a8631fb7e8c2ff78ee41326682021-12-28 3:31:42274 days 23 hrs ago 0x4a90a56525257133d4dda089a78990d1b1d826200x72fca528ae8c3da711a513ac8a2cef5ad03f82030 AVAX
0xa091e45bcfcd41d6a5723b7233bf6975f1fc1afb3dce3a575b36901f5b97c1ce41234952021-12-27 21:31:44275 days 5 hrs ago 0x4a90a56525257133d4dda089a78990d1b1d826200x72fca528ae8c3da711a513ac8a2cef5ad03f82030 AVAX
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Contract Source Code Verified (Exact Match)

Contract Name:
Oracle

Compiler Version
v0.6.12+commit.27d51765

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion, MIT license

Contract Source Code (Solidity)

/**
 *Submitted for verification at testnet.snowtrace.io on 2021-12-17
*/

// SPDX-License-Identifier: MIXED

// File @openzeppelin/contracts/math/[email protected]
// 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 contracts/lib/Babylonian.sol
// License-Identifier: MIT

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 contracts/lib/FixedPoint.sol
// License-Identifier: MIT

pragma solidity ^0.6.0;

// 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 contracts/interfaces/IUniswapV2Pair.sol
// License-Identifier: MIT

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 contracts/lib/UniswapV2OracleLibrary.sol
// License-Identifier: MIT

pragma solidity ^0.6.0;


// 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 @openzeppelin/contracts/utils/[email protected]
// 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;
    }
}

// File @openzeppelin/contracts/GSN/[email protected]
// License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

// File @openzeppelin/contracts/access/[email protected]
// License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/**
 * @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 contracts/owner/Operator.sol
// License-Identifier: MIT

pragma solidity 0.6.12;


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 contracts/utils/Epoch.sol
// License-Identifier: MIT

pragma solidity ^0.6.0;

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 contracts/Oracle.sol
// License-Identifier: MIT

pragma solidity 0.6.12;





/*
 _    _    ______    ______    _________    ______    _______     
| |  | |  |   ___|  |  __  \  |         |  |   ___|  |  _____|
| |__| |  |  |__    | |  | |  | |\   /| |  |  |__     \ \__
|  __  |  |   __|   | | /_/   | | \_/ | |  |   __|     \__ \
| |  | |  |  |___   | | \ \   | |     | |  |  |___    ____\ \
|_|  |_|  |______|  |_|  \_\  |_|     |_|  |______|  |_______|

*/
// 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);
}

Contract ABI

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

0000000000000000000000003336300120b693c9d807d1c8e8cb8059594cfb8f00000000000000000000000000000000000000000000000000000000000054600000000000000000000000000000000000000000000000000000000061bcacf8

-----Decoded View---------------
Arg [0] : _pair (address): 0x3336300120b693c9d807d1c8e8cb8059594cfb8f
Arg [1] : _period (uint256): 21600
Arg [2] : _startTime (uint256): 1639755000

-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 0000000000000000000000003336300120b693c9d807d1c8e8cb8059594cfb8f
Arg [1] : 0000000000000000000000000000000000000000000000000000000000005460
Arg [2] : 0000000000000000000000000000000000000000000000000000000061bcacf8


Deployed ByteCode Sourcemap

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Swarm Source

ipfs://5298da7fdff69ab208a508c5b66bb0876451a9e65f9da3ff63846e6b38075505
Block Transaction Gas Used Reward
Age Block Fee Address BC Fee Address Voting Power Jailed Incoming
Block Uncle Number Difficulty Gas Used Reward
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