Contract 0x79b6f29703080bec4f811da0a88083d415bda846

 
 
Txn Hash
Block
From
To
Value [Txn Fee]
0x41141ed16f37b1acd475bd3d0a20ef2921e859bcb1fc54d76957d1cc289c422a84425202021-06-19 21:00:3738 days 14 hrs ago0xcfb5822894587a2e00b71cc0e2e6351115479b2d IN  Keep3rb Network: CheeseSwapOracle0 BNB0.00167278
0xbc502ed7c2d56e18c3893afa8affd0d52a12295973e0f39c3ce87cc58a57631684425132021-06-19 21:00:1638 days 14 hrs ago0xcfb5822894587a2e00b71cc0e2e6351115479b2d IN  Keep3rb Network: CheeseSwapOracle0 BNB0.000540095
0x0d06c37e91c294522b1057adc31effd2716a701c886ece4c643e777869f9396784390092021-06-19 18:04:5138 days 17 hrs ago0xcfb5822894587a2e00b71cc0e2e6351115479b2d IN  Keep3rb Network: CheeseSwapOracle0 BNB0.000167325
0x506b1ad9a91dc320a586ad27fe836f91149c0cdcebf8964062878e9af858c3be84389502021-06-19 18:01:5438 days 17 hrs ago0xcfb5822894587a2e00b71cc0e2e6351115479b2d IN  Keep3rb Network: CheeseSwapOracle0 BNB0.001526435
0x4f751c41e7aee73fff7ed949eccbceeb26590e0964bf72b9c2cf0f4a6979b0ab84389272021-06-19 18:00:4538 days 17 hrs ago0xcfb5822894587a2e00b71cc0e2e6351115479b2d IN  Keep3rb Network: CheeseSwapOracle0 BNB0.00031361
0xc4221ce442fd13b01edf66ac2ffdd6dc65649333c304b5068d9169f9ed50ef5084387242021-06-19 17:50:3638 days 17 hrs ago0xcfb5822894587a2e00b71cc0e2e6351115479b2d IN  Keep3rb Network: CheeseSwapOracle0 BNB0.001601435
0x7e72d24ab7a39d755528977b130e058074349637557d84533daf1b604047296984387122021-06-19 17:50:0038 days 17 hrs ago0xcfb5822894587a2e00b71cc0e2e6351115479b2d IN  Keep3rb Network: CheeseSwapOracle0 BNB0.00031361
0x00da4d7aa6157edcb813cf49edb0e76a254b5d8304559e2c2eae5b15d9a304a181216562021-06-08 15:29:0849 days 19 hrs ago0x5d259edbcd0732bc55f90611b85abd90025c3de9 IN  Keep3rb Network: CheeseSwapOracle0 BNB0.00167278
0x0bdfb3acd543624c3c719e95eb1863d795b4383ea19d2d542444e9b4c92653d978140722021-05-28 22:25:2860 days 12 hrs ago0x61c749c4ecdc6e9e9025044b12fe3d2feef30ebb IN  Keep3rb Network: CheeseSwapOracle0 BNB0.00167278
0xdb656b6c6d6111ae1e42f24bb5d86fed72981ec0d632737dd4d9ebd1c079f86278132252021-05-28 21:42:4360 days 13 hrs ago0x61c749c4ecdc6e9e9025044b12fe3d2feef30ebb IN  Keep3rb Network: CheeseSwapOracle0 BNB0.00167278
0xec8bca39ef2ee2511190da9a2b8346fad1857694c62c0dae32610d469437d52b78119142021-05-28 20:36:1760 days 14 hrs ago0x1ff19b7f1271cd91c34a700105a603120c97d3d3 IN  Keep3rb Network: CheeseSwapOracle0 BNB0.00167278
0xa6f7ef98af326cf6b640481a6f9a62d81a96bec2133b2da6643151dbf40dd15078103362021-05-28 19:16:3660 days 15 hrs ago0x616a5652951cbe6b62913936ab829ec4f5b011b6 IN  Keep3rb Network: CheeseSwapOracle0 BNB0.00167278
0x43dc4cb07e6e486b0cba39937861a99c7a6fd722696ed645f2d84d952c7c8d8778088142021-05-28 18:00:2960 days 17 hrs ago0xbfb1b6028510c864fe9a1e56eb89a171ab755923 IN  Keep3rb Network: CheeseSwapOracle0 BNB0.00167278
0x047b989871de07706250fcb3bb7c0e5cc29cedbd3d3e1b2ef1b006c2943edb4a78014282021-05-28 11:50:4660 days 23 hrs ago0x4395c6351b2617423c97acbb29e65f09dc6e9d87 IN  Keep3rb Network: CheeseSwapOracle0 BNB0.00167278
0x27b98e1777677c3fbfd03d102ec644ed5640ad31438d5c512c81b6bdd06696a778001432021-05-28 10:46:3161 days 19 mins ago0x75e36b8f42c0d08d3c0ed94f4a8c9a136e872a85 IN  Keep3rb Network: CheeseSwapOracle0 BNB0.00167278
0xb4837fa7c31974b1b9398633f6a36b430576598f3be80e5c9d0469f69ccd014e77995352021-05-28 10:16:0761 days 49 mins ago0x75e36b8f42c0d08d3c0ed94f4a8c9a136e872a85 IN  Keep3rb Network: CheeseSwapOracle0 BNB0.00167278
0x0f42849e4d2843ae279f96677da0601edacc5f3c6b72cdfd027bfa2b499b1f0577889732021-05-28 1:27:3861 days 9 hrs ago0x8d9cc3a865e03e9cf8d312d453470db4c211b32a IN  Keep3rb Network: CheeseSwapOracle0 BNB0.00167278
0x1af40e318ba425e99e0f80d1d70fd7de72daa4d040db894fb6b19760919660de77883782021-05-28 0:56:3261 days 10 hrs ago0x8d9cc3a865e03e9cf8d312d453470db4c211b32a IN  Keep3rb Network: CheeseSwapOracle0 BNB0.00167278
0x3a6074ec5e7df14b183caece5ac99097029e7f1149878228858b5cc1baf009f377877522021-05-28 0:25:1461 days 10 hrs ago0xcf2f741df3bfbc65bc5e97899f01ce9f8d881844 IN  Keep3rb Network: CheeseSwapOracle0 BNB0.00167278
0xcd3f5f09a766b62a278b8773d32cabb0a74b254d182d253573a2bc9e5f7d9f6077851872021-05-27 22:16:5161 days 12 hrs ago0x61c749c4ecdc6e9e9025044b12fe3d2feef30ebb IN  Keep3rb Network: CheeseSwapOracle0 BNB0.00167278
0xcf8bb350fd5847093e1837e575a05ddde6a1e90e94f8622ae3d39828c30e211877845522021-05-27 21:45:0661 days 13 hrs ago0x61c749c4ecdc6e9e9025044b12fe3d2feef30ebb IN  Keep3rb Network: CheeseSwapOracle0 BNB0.00167278
0x2aac510281e22a8f90edfdf998eb599ccc588947d6b7c7331cd2fd68261498b277833222021-05-27 20:43:3261 days 14 hrs ago0x1ff19b7f1271cd91c34a700105a603120c97d3d3 IN  Keep3rb Network: CheeseSwapOracle0 BNB0.00167278
0x5bb174bf5aa4417cba690c6ce5f950ec0d876b84c79335e832e6b5b9e5bb427b77819742021-05-27 19:35:2861 days 15 hrs ago0x616a5652951cbe6b62913936ab829ec4f5b011b6 IN  Keep3rb Network: CheeseSwapOracle0 BNB0.00167278
0x2ab5edc81240b289fa6a2db4ad483b75a0e5687a00eaa2b9f6edb10219ac53da77794212021-05-27 17:27:4361 days 17 hrs ago0xbfb1b6028510c864fe9a1e56eb89a171ab755923 IN  Keep3rb Network: CheeseSwapOracle0 BNB0.00167278
0x80e682a5bd4cfac9ae8b7fab1e54e339a1c5d9dd4f0e1c7466182bcb5f6b4d5777669042021-05-27 6:55:0962 days 4 hrs ago0x8d9cc3a865e03e9cf8d312d453470db4c211b32a IN  Keep3rb Network: CheeseSwapOracle0 BNB0.00167278
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Latest 25 internal transaction
Parent Txn Hash Block From To Value
0xc6699b8e0e2b9478612027e1adc80242ce4f882a57f0dbedbe4869ebabdac56e54704262021-03-07 11:14:15142 days 23 hrs ago Keep3rb Network: CheeseSwapOracle Keep3rb Network: KP3RB Token0 BNB
0xc6699b8e0e2b9478612027e1adc80242ce4f882a57f0dbedbe4869ebabdac56e54704262021-03-07 11:14:15142 days 23 hrs ago Keep3rb Network: CheeseSwapOracle CheeseSwap: KP3RB-USDC0 BNB
0xc6699b8e0e2b9478612027e1adc80242ce4f882a57f0dbedbe4869ebabdac56e54704262021-03-07 11:14:15142 days 23 hrs ago Keep3rb Network: CheeseSwapOracle CheeseSwap: KP3RB-USDC0 BNB
0xc6699b8e0e2b9478612027e1adc80242ce4f882a57f0dbedbe4869ebabdac56e54704262021-03-07 11:14:15142 days 23 hrs ago Keep3rb Network: CheeseSwapOracle CheeseSwap: KP3RB-USDC0 BNB
0xc6699b8e0e2b9478612027e1adc80242ce4f882a57f0dbedbe4869ebabdac56e54704262021-03-07 11:14:15142 days 23 hrs ago Keep3rb Network: CheeseSwapOracle CheeseSwap: KP3RB-CHS0 BNB
0xc6699b8e0e2b9478612027e1adc80242ce4f882a57f0dbedbe4869ebabdac56e54704262021-03-07 11:14:15142 days 23 hrs ago Keep3rb Network: CheeseSwapOracle CheeseSwap: KP3RB-CHS0 BNB
0xc6699b8e0e2b9478612027e1adc80242ce4f882a57f0dbedbe4869ebabdac56e54704262021-03-07 11:14:15142 days 23 hrs ago Keep3rb Network: CheeseSwapOracle CheeseSwap: KP3RB-CHS0 BNB
0xc6699b8e0e2b9478612027e1adc80242ce4f882a57f0dbedbe4869ebabdac56e54704262021-03-07 11:14:15142 days 23 hrs ago Keep3rb Network: CheeseSwapOracle CheeseSwap: CHS-WBNB0 BNB
0xc6699b8e0e2b9478612027e1adc80242ce4f882a57f0dbedbe4869ebabdac56e54704262021-03-07 11:14:15142 days 23 hrs ago Keep3rb Network: CheeseSwapOracle CheeseSwap: CHS-WBNB0 BNB
0xc6699b8e0e2b9478612027e1adc80242ce4f882a57f0dbedbe4869ebabdac56e54704262021-03-07 11:14:15142 days 23 hrs ago Keep3rb Network: CheeseSwapOracle CheeseSwap: CHS-WBNB0 BNB
0xc6699b8e0e2b9478612027e1adc80242ce4f882a57f0dbedbe4869ebabdac56e54704262021-03-07 11:14:15142 days 23 hrs ago Keep3rb Network: CheeseSwapOracle CheeseSwap: BUTT-CHS0 BNB
0xc6699b8e0e2b9478612027e1adc80242ce4f882a57f0dbedbe4869ebabdac56e54704262021-03-07 11:14:15142 days 23 hrs ago Keep3rb Network: CheeseSwapOracle CheeseSwap: BUTT-CHS0 BNB
0xc6699b8e0e2b9478612027e1adc80242ce4f882a57f0dbedbe4869ebabdac56e54704262021-03-07 11:14:15142 days 23 hrs ago Keep3rb Network: CheeseSwapOracle CheeseSwap: BUTT-CHS0 BNB
0xc6699b8e0e2b9478612027e1adc80242ce4f882a57f0dbedbe4869ebabdac56e54704262021-03-07 11:14:15142 days 23 hrs ago Keep3rb Network: CheeseSwapOracle 0xb95538ecae1387bd8637daaba0f30c9f72c69cd00 BNB
0xc6699b8e0e2b9478612027e1adc80242ce4f882a57f0dbedbe4869ebabdac56e54704262021-03-07 11:14:15142 days 23 hrs ago Keep3rb Network: CheeseSwapOracle 0xb95538ecae1387bd8637daaba0f30c9f72c69cd00 BNB
0xc6699b8e0e2b9478612027e1adc80242ce4f882a57f0dbedbe4869ebabdac56e54704262021-03-07 11:14:15142 days 23 hrs ago Keep3rb Network: CheeseSwapOracle 0xb95538ecae1387bd8637daaba0f30c9f72c69cd00 BNB
0xc6699b8e0e2b9478612027e1adc80242ce4f882a57f0dbedbe4869ebabdac56e54704262021-03-07 11:14:15142 days 23 hrs ago Keep3rb Network: CheeseSwapOracle CheeseSwap: WBNB-USDT0 BNB
0xc6699b8e0e2b9478612027e1adc80242ce4f882a57f0dbedbe4869ebabdac56e54704262021-03-07 11:14:15142 days 23 hrs ago Keep3rb Network: CheeseSwapOracle CheeseSwap: WBNB-USDT0 BNB
0xc6699b8e0e2b9478612027e1adc80242ce4f882a57f0dbedbe4869ebabdac56e54704262021-03-07 11:14:15142 days 23 hrs ago Keep3rb Network: CheeseSwapOracle CheeseSwap: WBNB-USDT0 BNB
0xc6699b8e0e2b9478612027e1adc80242ce4f882a57f0dbedbe4869ebabdac56e54704262021-03-07 11:14:15142 days 23 hrs ago Keep3rb Network: CheeseSwapOracle CheeseSwap: KP3RB-WBNB0 BNB
0xc6699b8e0e2b9478612027e1adc80242ce4f882a57f0dbedbe4869ebabdac56e54704262021-03-07 11:14:15142 days 23 hrs ago Keep3rb Network: CheeseSwapOracle CheeseSwap: KP3RB-WBNB0 BNB
0xc6699b8e0e2b9478612027e1adc80242ce4f882a57f0dbedbe4869ebabdac56e54704262021-03-07 11:14:15142 days 23 hrs ago Keep3rb Network: CheeseSwapOracle CheeseSwap: KP3RB-WBNB0 BNB
0xc6699b8e0e2b9478612027e1adc80242ce4f882a57f0dbedbe4869ebabdac56e54704262021-03-07 11:14:15142 days 23 hrs ago Keep3rb Network: CheeseSwapOracle Keep3rb Network: KP3RB Token0 BNB
0x16947c132cc59ba9396585df07fe601626598aafdfa45d9ee6c070a5d3d7612154699662021-03-07 10:51:15143 days 14 mins ago Keep3rb Network: CheeseSwapOracle Keep3rb Network: KP3RB Token0 BNB
0x16947c132cc59ba9396585df07fe601626598aafdfa45d9ee6c070a5d3d7612154699662021-03-07 10:51:15143 days 14 mins ago Keep3rb Network: CheeseSwapOracle CheeseSwap: KP3RB-USDC0 BNB
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Contract Source Code Verified (Exact Match)

Contract Name:
CheeseSwapOracle

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 BscScan.com on 2020-12-07
*/

// SPDX-License-Identifier: MIT


pragma solidity ^0.6.12;

interface ICheeseSwapFactory {
    event PairCreated(address indexed token0, address indexed token1, address pair, uint);

    function feeTo() external view returns (address);
    function feeToSetter() external view returns (address);

    function getPair(address tokenA, address tokenB) external view returns (address pair);
    function allPairs(uint) external view returns (address pair);
    function allPairsLength() external view returns (uint);

    function createPair(address tokenA, address tokenB) external returns (address pair);

    function setFeeTo(address) external;
    function setFeeToSetter(address) external;
}

interface ICheeseSwapPair {
    event Approval(address indexed owner, address indexed spender, uint value);
    event Transfer(address indexed from, address indexed to, uint 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 (uint);
    function balanceOf(address owner) external view returns (uint);
    function allowance(address owner, address spender) external view returns (uint);

    function approve(address spender, uint value) external returns (bool);
    function transfer(address to, uint value) external returns (bool);
    function transferFrom(address from, address to, uint 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 (uint);

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

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

    function MINIMUM_LIQUIDITY() external pure returns (uint);
    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 (uint);
    function price1CumulativeLast() external view returns (uint);
    function kLast() external view returns (uint);

    function mint(address to) external returns (uint liquidity);
    function burn(address to) external returns (uint amount0, uint amount1);
    function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
    function skim(address to) external;
    function sync() external;

    function initialize(address, address) external;
}


library FixedPoint {
    struct uq112x112 {
        uint224 _x;
    }
    struct uq144x112 {
        uint _x;
    }

    uint8 private constant RESOLUTION = 112;

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

    function encode144(uint144 x) internal pure returns (uq144x112 memory) {
        return uq144x112(uint256(x) << RESOLUTION);
    }

    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));
    }

    function mul(uq112x112 memory self, uint y) internal pure returns (uq144x112 memory) {
        uint z;
        require(y == 0 || (z = uint(self._x) * y) / y == uint(self._x), "FixedPoint: MULTIPLICATION_OVERFLOW");
        return uq144x112(z);
    }

    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);
    }
}


library CheeseSwapOracleLibrary {
    using FixedPoint for *;
    function currentBlockTimestamp() internal view returns (uint32) {
        return uint32(block.timestamp % 2 ** 32);
    }

    function currentCumulativePrices(
        address pair
    ) internal view returns (uint price0Cumulative, uint price1Cumulative, uint32 blockTimestamp) {
        blockTimestamp = currentBlockTimestamp();
        price0Cumulative = ICheeseSwapPair(pair).price0CumulativeLast();
        price1Cumulative = ICheeseSwapPair(pair).price1CumulativeLast();

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

// a library for performing overflow-safe math, courtesy of DappHub (https://github.com/dapphub/ds-math)

library SafeMath {
    function add(uint x, uint y) internal pure returns (uint z) {
        require((z = x + y) >= x, 'ds-math-add-overflow');
    }

    function sub(uint x, uint y) internal pure returns (uint z) {
        require((z = x - y) <= x, 'ds-math-sub-underflow');
    }

    function mul(uint x, uint y) internal pure returns (uint z) {
        require(y == 0 || (z = x * y) / y == x, 'ds-math-mul-overflow');
    }
}

library CheeseSwapLibrary {
    using SafeMath for uint;

    // returns sorted token addresses, used to handle return values from pairs sorted in this order
    function sortTokens(address tokenA, address tokenB) internal pure returns (address token0, address token1) {
        require(tokenA != tokenB, 'CheeseSwapLibrary: IDENTICAL_ADDRESSES');
        (token0, token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
        require(token0 != address(0), 'CheeseSwapLibrary: ZERO_ADDRESS');
    }

    // calculates the CREATE2 address for a pair without making any external calls
    function pairFor(address factory, address tokenA, address tokenB) internal pure returns (address pair) {
        (address token0, address token1) = sortTokens(tokenA, tokenB);
        pair = address(uint(keccak256(abi.encodePacked(
                hex'ff',
                factory,
                keccak256(abi.encodePacked(token0, token1)),
                hex'f52c5189a89e7ca2ef4f19f2798e3900fba7a316de7cef6c5a9446621ba86286' // init code hash
            ))));
    }

    // fetches and sorts the reserves for a pair
    function getReserves(address factory, address tokenA, address tokenB) internal view returns (uint reserveA, uint reserveB) {
        (address token0,) = sortTokens(tokenA, tokenB);
        (uint reserve0, uint reserve1,) = ICheeseSwapPair(pairFor(factory, tokenA, tokenB)).getReserves();
        (reserveA, reserveB) = tokenA == token0 ? (reserve0, reserve1) : (reserve1, reserve0);
    }

    // given some amount of an asset and pair reserves, returns an equivalent amount of the other asset
    function quote(uint amountA, uint reserveA, uint reserveB) internal pure returns (uint amountB) {
        require(amountA > 0, 'CheeseSwapLibrary: INSUFFICIENT_AMOUNT');
        require(reserveA > 0 && reserveB > 0, 'CheeseSwapLibrary: INSUFFICIENT_LIQUIDITY');
        amountB = amountA.mul(reserveB) / reserveA;
    }

    // given an input amount of an asset and pair reserves, returns the maximum output amount of the other asset
    function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) internal pure returns (uint amountOut) {
        require(amountIn > 0, 'CheeseSwapLibrary: INSUFFICIENT_INPUT_AMOUNT');
        require(reserveIn > 0 && reserveOut > 0, 'CheeseSwapLibrary: INSUFFICIENT_LIQUIDITY');
        uint amountInWithFee = amountIn.mul(997);
        uint numerator = amountInWithFee.mul(reserveOut);
        uint denominator = reserveIn.mul(1000).add(amountInWithFee);
        amountOut = numerator / denominator;
    }

    // given an output amount of an asset and pair reserves, returns a required input amount of the other asset
    function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) internal pure returns (uint amountIn) {
        require(amountOut > 0, 'CheeseSwapLibrary: INSUFFICIENT_OUTPUT_AMOUNT');
        require(reserveIn > 0 && reserveOut > 0, 'CheeseSwapLibrary: INSUFFICIENT_LIQUIDITY');
        uint numerator = reserveIn.mul(amountOut).mul(1000);
        uint denominator = reserveOut.sub(amountOut).mul(997);
        amountIn = (numerator / denominator).add(1);
    }

    // performs chained getAmountOut calculations on any number of pairs
    function getAmountsOut(address factory, uint amountIn, address[] memory path) internal view returns (uint[] memory amounts) {
        require(path.length >= 2, 'CheeseSwapLibrary: INVALID_PATH');
        amounts = new uint[](path.length);
        amounts[0] = amountIn;
        for (uint i; i < path.length - 1; i++) {
            (uint reserveIn, uint reserveOut) = getReserves(factory, path[i], path[i + 1]);
            amounts[i + 1] = getAmountOut(amounts[i], reserveIn, reserveOut);
        }
    }

    // performs chained getAmountIn calculations on any number of pairs
    function getAmountsIn(address factory, uint amountOut, address[] memory path) internal view returns (uint[] memory amounts) {
        require(path.length >= 2, 'CheeseSwapLibrary: INVALID_PATH');
        amounts = new uint[](path.length);
        amounts[amounts.length - 1] = amountOut;
        for (uint i = path.length - 1; i > 0; i--) {
            (uint reserveIn, uint reserveOut) = getReserves(factory, path[i - 1], path[i]);
            amounts[i - 1] = getAmountIn(amounts[i], reserveIn, reserveOut);
        }
    }
}

interface IKeep3rb {
    function isKeeper(address) external returns (bool);
    function worked(address keeper) external;
}

contract CheeseSwapOracle {
    using FixedPoint for *;
    using SafeMath for uint;

    struct Observation {
        uint timestamp;
        uint price0Cumulative;
        uint price1Cumulative;
    }
    
    modifier keeper() {
        require(KP3RB.isKeeper(msg.sender), "::isKeeper: keeper is not registered");
        _;
    }
    
    modifier upkeep() {
        require(KP3RB.isKeeper(msg.sender), "::isKeeper: keeper is not registered");
        _;
        KP3RB.worked(msg.sender);
    }
    
    address public governance;
    address public pendingGovernance;
    function setGovernance(address _governance) external {
        require(msg.sender == governance, "setGovernance: !gov");
        pendingGovernance = _governance;
    }

    function acceptGovernance() external {
        require(msg.sender == pendingGovernance, "acceptGovernance: !pendingGov");
        governance = pendingGovernance;
    }
    
    function setKeep3rb(address _keep3rb) external {
        require(msg.sender == governance, "setKeep3rb: !gov");
        KP3RB = IKeep3rb(_keep3rb);
    }
    
    IKeep3rb public KP3RB;

    address public immutable factory = 0xdd538E4Fd1b69B7863E1F741213276A6Cf1EfB3B;
    uint public immutable windowSize = 14400;
    uint8 public immutable granularity = 8;
    uint public immutable periodSize = 1800;
    
    address[] internal _pairs;
    mapping(address => bool) internal _known;
    mapping(address => uint) public lastUpdated;
    
    function pairs() external view returns (address[] memory) {
        return _pairs;
    }
    mapping(address => Observation[]) public pairObservations;

    constructor(address _keep3rb) public {
        governance = msg.sender;
        KP3RB = IKeep3rb(_keep3rb);
    }

    // returns the index of the observation corresponding to the given timestamp
    function observationIndexOf(uint timestamp) public view returns (uint8 index) {
        uint epochPeriod = timestamp / periodSize;
        return uint8(epochPeriod % granularity);
    }

    // returns the observation from the oldest epoch (at the beginning of the window) relative to the current time
    function getFirstObservationInWindow(address pair) private view returns (Observation storage firstObservation) {
        uint8 observationIndex = observationIndexOf(block.timestamp);
        // no overflow issue. if observationIndex + 1 overflows, result is still zero.
        uint8 firstObservationIndex = (observationIndex + 1) % granularity;
        firstObservation = pairObservations[pair][firstObservationIndex];
    }
    
    function updatePair(address pair) external keeper returns (bool) {
        return _update(pair);
    }

    // update the cumulative price for the observation at the current timestamp. each observation is updated at most
    // once per epoch period.
    function update(address tokenA, address tokenB) external keeper returns (bool) {
        address pair = CheeseSwapLibrary.pairFor(factory, tokenA, tokenB);
        return _update(pair);
    }
    
    function add(address tokenA, address tokenB) external {
        require(msg.sender == governance, "CheeseSwapOracle::add: !gov");
        address pair = CheeseSwapLibrary.pairFor(factory, tokenA, tokenB);
        require(!_known[pair], "known");
        _known[pair] = true;
        _pairs.push(pair);
    }
    
    function work() public upkeep {
        bool worked = _updateAll();
        require(worked, "CheeseSwapOracle: !work");
    }
    
    function _updateAll() internal returns (bool updated) {
        for (uint i = 0; i < _pairs.length; i++) {
            if (_update(_pairs[i])) {
                updated = true;
            }
        }
    }
    
    function updateFor(uint i, uint length) external keeper returns (bool updated) {
        for (; i < length; i++) {
            if (_update(_pairs[i])) {
                updated = true;
            }
        }
    }
    
    function updateableList() external view returns (address[] memory list) {
        uint _index = 0;
        for (uint i = 0; i < _pairs.length; i++) {
            if (updateable(_pairs[i])) {
               list[_index++] = _pairs[i];
            }
        }
    }
    
    function updateable(address pair) public view returns (bool) {
        return (block.timestamp - lastUpdated[pair]) > periodSize;
    }
    
    function updateable() external view returns (bool) {
        for (uint i = 0; i < _pairs.length; i++) {
            if (updateable(_pairs[i])) {
                return true;
            }
        }
        return false;
    }
    
    function updateableFor(uint i, uint length) external view returns (bool) {
        for (; i < length; i++) {
            if (updateable(_pairs[i])) {
                return true;
            }
        }
        return false;
    }
    
    function _update(address pair) internal returns (bool) {
        // populate the array with empty observations (first call only)
        for (uint i = pairObservations[pair].length; i < granularity; i++) {
            pairObservations[pair].push();
        }

        // get the observation for the current period
        uint8 observationIndex = observationIndexOf(block.timestamp);
        Observation storage observation = pairObservations[pair][observationIndex];

        // we only want to commit updates once per period (i.e. windowSize / granularity)
        uint timeElapsed = block.timestamp - observation.timestamp;
        if (timeElapsed > periodSize) {
            (uint price0Cumulative, uint price1Cumulative,) = CheeseSwapOracleLibrary.currentCumulativePrices(pair);
            observation.timestamp = block.timestamp;
            lastUpdated[pair] = block.timestamp;
            observation.price0Cumulative = price0Cumulative;
            observation.price1Cumulative = price1Cumulative;
            return true;
        }
        
        return false;
    }

    // given the cumulative prices of the start and end of a period, and the length of the period, compute the average
    // price in terms of how much amount out is received for the amount in
    function computeAmountOut(
        uint priceCumulativeStart, uint priceCumulativeEnd,
        uint timeElapsed, uint amountIn
    ) private pure returns (uint amountOut) {
        // overflow is desired.
        FixedPoint.uq112x112 memory priceAverage = FixedPoint.uq112x112(
            uint224((priceCumulativeEnd - priceCumulativeStart) / timeElapsed)
        );
        amountOut = priceAverage.mul(amountIn).decode144();
    }

    function consult(address tokenIn, uint amountIn, address tokenOut) external view returns (uint amountOut) {
        address pair = CheeseSwapLibrary.pairFor(factory, tokenIn, tokenOut);
        Observation storage firstObservation = getFirstObservationInWindow(pair);

        uint timeElapsed = block.timestamp - firstObservation.timestamp;
        require(timeElapsed <= windowSize, 'SlidingWindowOracle: MISSING_HISTORICAL_OBSERVATION');
        // should never happen.
        require(timeElapsed >= windowSize - periodSize * 2, 'SlidingWindowOracle: UNEXPECTED_TIME_ELAPSED');

        (uint price0Cumulative, uint price1Cumulative,) = CheeseSwapOracleLibrary.currentCumulativePrices(pair);
        (address token0,) = CheeseSwapLibrary.sortTokens(tokenIn, tokenOut);

        if (token0 == tokenIn) {
            return computeAmountOut(firstObservation.price0Cumulative, price0Cumulative, timeElapsed, amountIn);
        } else {
            return computeAmountOut(firstObservation.price1Cumulative, price1Cumulative, timeElapsed, amountIn);
        }
    }
}

Contract ABI

[{"inputs":[{"internalType":"address","name":"_keep3rb","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"KP3RB","outputs":[{"internalType":"contract IKeep3rb","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"acceptGovernance","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"tokenA","type":"address"},{"internalType":"address","name":"tokenB","type":"address"}],"name":"add","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"tokenIn","type":"address"},{"internalType":"uint256","name":"amountIn","type":"uint256"},{"internalType":"address","name":"tokenOut","type":"address"}],"name":"consult","outputs":[{"internalType":"uint256","name":"amountOut","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"factory","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"governance","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"granularity","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"lastUpdated","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"timestamp","type":"uint256"}],"name":"observationIndexOf","outputs":[{"internalType":"uint8","name":"index","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"}],"name":"pairObservations","outputs":[{"internalType":"uint256","name":"timestamp","type":"uint256"},{"internalType":"uint256","name":"price0Cumulative","type":"uint256"},{"internalType":"uint256","name":"price1Cumulative","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pairs","outputs":[{"internalType":"address[]","name":"","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pendingGovernance","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"periodSize","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_governance","type":"address"}],"name":"setGovernance","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_keep3rb","type":"address"}],"name":"setKeep3rb","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"tokenA","type":"address"},{"internalType":"address","name":"tokenB","type":"address"}],"name":"update","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"i","type":"uint256"},{"internalType":"uint256","name":"length","type":"uint256"}],"name":"updateFor","outputs":[{"internalType":"bool","name":"updated","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"pair","type":"address"}],"name":"updatePair","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"updateable","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"pair","type":"address"}],"name":"updateable","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"i","type":"uint256"},{"internalType":"uint256","name":"length","type":"uint256"}],"name":"updateableFor","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"updateableList","outputs":[{"internalType":"address[]","name":"list","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"windowSize","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"work","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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

0000000000000000000000005ea29eee799aa7cc379fde5cf370bc24f2ea7c81

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000005ea29eee799aa7cc379fde5cf370bc24f2ea7c81


Deployed ByteCode Sourcemap

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Swarm Source

ipfs://642ca876423cd6dae9356b7e81a744dbe6abf3be21fcd13b33f08ba7934ec590
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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