Contract 0x79b6F29703080BeC4f811DA0A88083d415Bda846

 
Txn Hash
Block
From
To
Value [Txn Fee]
0x54c1d7d417b626081ccacf1f91798d01967e7bd4ca10ea5a9b0909480e8707c452433852021-02-27 12:22:212 mins ago0xd49c9065c26ece23e12ed4cd7f440ef55de51cb3 IN  Keep3rb Network: CheeseSwapOracle0 BNB0.00062734
0x3551f8270e6ee9569a336f65607c7bf6e9320694d180ba333dc00d85116ada8052429822021-02-27 12:02:1222 mins ago0x3be6b547c850815611efb613d42a85aae1b8df76 IN  Keep3rb Network: CheeseSwapOracle0 BNB0.00334556
0x5c7c3d4b3604c108dc205afce59c538da1f7046527b25e6c5c64e3e4a18a2fe952423492021-02-27 11:30:3354 mins ago0x100332722879ddb9bd5f82d8bcccf52bd1f8aded IN  Keep3rb Network: CheeseSwapOracle0 BNB0.0033453
0xd638a133e145197476d824088710279e6440147932fc26608a3e5232c6b6abea52417452021-02-27 11:00:081 hr 24 mins ago0x005a945c426fe1f2eb3c4b04585a2427f7a032a8 IN  Keep3rb Network: CheeseSwapOracle0 BNB0.00334556
0xcfc6861f4ef7ecb65339b87b65a850a119c431727a0ff4431fdde5946b96b55d52411642021-02-27 10:31:051 hr 53 mins ago0xe6d19e22f0589e88e65ba1df9ca891653b396573 IN  Keep3rb Network: CheeseSwapOracle0 BNB0.0033453
0x14cdcb6008f8283a3c0b36ca7d373759cb356dfd80a9af123e2460ad176c409852405562021-02-27 10:00:412 hrs 24 mins ago0x1cd65bab9683dc74a0746b0922af49949c4fee65 IN  Keep3rb Network: CheeseSwapOracle0 BNB0.00334556
0x45c24ec2c693ba2c12a696d7c48e615f965e7e30b9a1a7082abcf14a7ae4764152399462021-02-27 9:30:112 hrs 54 mins ago0x0ab745e9055bb6c21456616734be26cc29bed637 IN  Keep3rb Network: CheeseSwapOracle0 BNB0.0033453
0x370ec56b1b67adb176392373d73fe2bca7581a601eaa283d55bcd98b3d64633652393452021-02-27 9:00:083 hrs 24 mins ago0x005a945c426fe1f2eb3c4b04585a2427f7a032a8 IN  Keep3rb Network: CheeseSwapOracle0 BNB0.00334556
0x3353d70bb48648deeddb5779b1f0ac44bd0286d79f046b85e600fe5ef7cab26852381502021-02-27 8:00:234 hrs 24 mins ago0x1cd65bab9683dc74a0746b0922af49949c4fee65 IN  Keep3rb Network: CheeseSwapOracle0 BNB0.00334556
0xab6136a56821905e77b08d9d63e93535c8a4779d4a462c01684ded2d91f91f5e52375472021-02-27 7:30:134 hrs 54 mins ago0x1cd65bab9683dc74a0746b0922af49949c4fee65 IN  Keep3rb Network: CheeseSwapOracle0 BNB0.00334556
0xca6177dcdd171f6ebac54bb5ff9d8a6960a856a1fe3f0b9569cba399d637362b52369522021-02-27 7:00:275 hrs 24 mins ago0x6f198f157246a596acd5766814cc4d5a74234d19 IN  Keep3rb Network: CheeseSwapOracle0 BNB0.00334556
0x4526b7a82a9070f1f12c8aac6f3209f3d834fc5e74b74b56c627e21d71484d4352363512021-02-27 6:30:235 hrs 54 mins ago0x6f198f157246a596acd5766814cc4d5a74234d19 IN  Keep3rb Network: CheeseSwapOracle0 BNB0.00334556
0x2f80f31abc42bcdd3ce546c78bf361621d40cd2119f955dc0b3dd3cfb84ab1fb52358362021-02-27 6:04:386 hrs 20 mins ago0x0ab745e9055bb6c21456616734be26cc29bed637 IN  Keep3rb Network: CheeseSwapOracle0 BNB0.0033453
0x57a80113e823ff09ae93cc7f87e29075ea8477be9013f64f34edc7259995fa3252353652021-02-27 5:41:056 hrs 43 mins ago0x6f198f157246a596acd5766814cc4d5a74234d19 IN  Keep3rb Network: CheeseSwapOracle0 BNB0.00334556
0xb3b9136e15c27090119dbf282222a92c34ddf65b468a87dc5fabce1f8e9e99bf52349572021-02-27 5:20:387 hrs 4 mins ago0x6f198f157246a596acd5766814cc4d5a74234d19 IN  Keep3rb Network: CheeseSwapOracle0 BNB0.00334556
0x9ed0d40fc518120cb1381860fe4542eae3270de09b428b14e003268a0a85472852344392021-02-27 4:54:447 hrs 30 mins ago0x6f198f157246a596acd5766814cc4d5a74234d19 IN  Keep3rb Network: CheeseSwapOracle0 BNB0.00334556
0x04acf3be682ba821d6c1b47603e089f4b88204a9c73d91b5bcec87184314f69652336872021-02-27 4:17:088 hrs 7 mins ago0x100332722879ddb9bd5f82d8bcccf52bd1f8aded IN  Keep3rb Network: CheeseSwapOracle0 BNB0.00065401
0xf5b9d73a860905a9b232da13f943dd5fd7341b53184ec249a670b3d8c71a348a52336862021-02-27 4:17:058 hrs 7 mins ago0x0ab745e9055bb6c21456616734be26cc29bed637 IN  Keep3rb Network: CheeseSwapOracle0 BNB0.0033453
0x5b3fe11daabc3d417d877b3ee93e57bbbd81ae7b55aa265367e3f6245aade0dc52327992021-02-27 3:32:448 hrs 52 mins ago0xcc6162f76e9f8026f2eddf2ec30c032514abd048 IN  Keep3rb Network: CheeseSwapOracle0 BNB0.0033453
0xa577c5e70c9dc5017a4b0e3f14fe53c749304ec2fc7b32ced19a35f16c3a773b52321892021-02-27 3:02:149 hrs 22 mins ago0xcc6162f76e9f8026f2eddf2ec30c032514abd048 IN  Keep3rb Network: CheeseSwapOracle0 BNB0.0033453
0x5c09207a0f79b6e3a0edf88550d9c3cf012a4c1d26b527cc454a09de1889630752315492021-02-27 2:30:149 hrs 54 mins ago0xcc6162f76e9f8026f2eddf2ec30c032514abd048 IN  Keep3rb Network: CheeseSwapOracle0 BNB0.0033453
0x12c18490527aca71ba8ed042bf5168fb0b5fd38fee7be1879311e631f0b311d852309482021-02-27 2:00:1110 hrs 24 mins ago0x23270d3c66298d52266fd9e6692528dd0307d400 IN  Keep3rb Network: CheeseSwapOracle0 BNB0.00334556
0xda48434660e7dd0b07dc43c95766382533c8255d14618af18a726f631f81266052303702021-02-27 1:31:1710 hrs 53 mins ago0x23270d3c66298d52266fd9e6692528dd0307d400 IN  Keep3rb Network: CheeseSwapOracle0 BNB0.00334556
0xdd8fe9d5630b35286b01b6e004117defd2124d01b100e3af9a5b5e94604bd21d52297902021-02-27 1:02:1711 hrs 22 mins ago0x23270d3c66298d52266fd9e6692528dd0307d400 IN  Keep3rb Network: CheeseSwapOracle0 BNB0.00334556
0xe2c80ef96972156dde24a3363f4dcbc1a36f92fe90be7b8aad6467b13de5897752293382021-02-27 0:38:5511 hrs 46 mins ago0x23270d3c66298d52266fd9e6692528dd0307d400 IN  Keep3rb Network: CheeseSwapOracle0 BNB0.00334556
[ Download CSV Export 
Latest 25 internal transaction
Parent Txn Hash Block From To Value
0x54c1d7d417b626081ccacf1f91798d01967e7bd4ca10ea5a9b0909480e8707c452433852021-02-27 12:22:212 mins ago Keep3rb Network: CheeseSwapOracle CheeseSwap: DAI-WBNB0 BNB
0x54c1d7d417b626081ccacf1f91798d01967e7bd4ca10ea5a9b0909480e8707c452433852021-02-27 12:22:212 mins ago Keep3rb Network: CheeseSwapOracle CheeseSwap: DAI-WBNB0 BNB
0x54c1d7d417b626081ccacf1f91798d01967e7bd4ca10ea5a9b0909480e8707c452433852021-02-27 12:22:212 mins ago Keep3rb Network: CheeseSwapOracle CheeseSwap: DAI-WBNB0 BNB
0x54c1d7d417b626081ccacf1f91798d01967e7bd4ca10ea5a9b0909480e8707c452433852021-02-27 12:22:212 mins ago Keep3rb Network: CheeseSwapOracle Keep3rb Network: KP3RB Token0 BNB
0x3551f8270e6ee9569a336f65607c7bf6e9320694d180ba333dc00d85116ada8052429822021-02-27 12:02:1222 mins ago Keep3rb Network: CheeseSwapOracle Keep3rb Network: KP3RB Token0 BNB
0x3551f8270e6ee9569a336f65607c7bf6e9320694d180ba333dc00d85116ada8052429822021-02-27 12:02:1222 mins ago Keep3rb Network: CheeseSwapOracle CheeseSwap: KP3RB-USDC0 BNB
0x3551f8270e6ee9569a336f65607c7bf6e9320694d180ba333dc00d85116ada8052429822021-02-27 12:02:1222 mins ago Keep3rb Network: CheeseSwapOracle CheeseSwap: KP3RB-USDC0 BNB
0x3551f8270e6ee9569a336f65607c7bf6e9320694d180ba333dc00d85116ada8052429822021-02-27 12:02:1222 mins ago Keep3rb Network: CheeseSwapOracle CheeseSwap: KP3RB-USDC0 BNB
0x3551f8270e6ee9569a336f65607c7bf6e9320694d180ba333dc00d85116ada8052429822021-02-27 12:02:1222 mins ago Keep3rb Network: CheeseSwapOracle CheeseSwap: KP3RB-CHS0 BNB
0x3551f8270e6ee9569a336f65607c7bf6e9320694d180ba333dc00d85116ada8052429822021-02-27 12:02:1222 mins ago Keep3rb Network: CheeseSwapOracle CheeseSwap: KP3RB-CHS0 BNB
0x3551f8270e6ee9569a336f65607c7bf6e9320694d180ba333dc00d85116ada8052429822021-02-27 12:02:1222 mins ago Keep3rb Network: CheeseSwapOracle CheeseSwap: KP3RB-CHS0 BNB
0x3551f8270e6ee9569a336f65607c7bf6e9320694d180ba333dc00d85116ada8052429822021-02-27 12:02:1222 mins ago Keep3rb Network: CheeseSwapOracle CheeseSwap: CHS-WBNB0 BNB
0x3551f8270e6ee9569a336f65607c7bf6e9320694d180ba333dc00d85116ada8052429822021-02-27 12:02:1222 mins ago Keep3rb Network: CheeseSwapOracle CheeseSwap: CHS-WBNB0 BNB
0x3551f8270e6ee9569a336f65607c7bf6e9320694d180ba333dc00d85116ada8052429822021-02-27 12:02:1222 mins ago Keep3rb Network: CheeseSwapOracle CheeseSwap: CHS-WBNB0 BNB
0x3551f8270e6ee9569a336f65607c7bf6e9320694d180ba333dc00d85116ada8052429822021-02-27 12:02:1222 mins ago Keep3rb Network: CheeseSwapOracle CheeseSwap: BUTT-CHS0 BNB
0x3551f8270e6ee9569a336f65607c7bf6e9320694d180ba333dc00d85116ada8052429822021-02-27 12:02:1222 mins ago Keep3rb Network: CheeseSwapOracle CheeseSwap: BUTT-CHS0 BNB
0x3551f8270e6ee9569a336f65607c7bf6e9320694d180ba333dc00d85116ada8052429822021-02-27 12:02:1222 mins ago Keep3rb Network: CheeseSwapOracle CheeseSwap: BUTT-CHS0 BNB
0x3551f8270e6ee9569a336f65607c7bf6e9320694d180ba333dc00d85116ada8052429822021-02-27 12:02:1222 mins ago Keep3rb Network: CheeseSwapOracle 0xb95538ecae1387bd8637daaba0f30c9f72c69cd00 BNB
0x3551f8270e6ee9569a336f65607c7bf6e9320694d180ba333dc00d85116ada8052429822021-02-27 12:02:1222 mins ago Keep3rb Network: CheeseSwapOracle 0xb95538ecae1387bd8637daaba0f30c9f72c69cd00 BNB
0x3551f8270e6ee9569a336f65607c7bf6e9320694d180ba333dc00d85116ada8052429822021-02-27 12:02:1222 mins ago Keep3rb Network: CheeseSwapOracle 0xb95538ecae1387bd8637daaba0f30c9f72c69cd00 BNB
0x3551f8270e6ee9569a336f65607c7bf6e9320694d180ba333dc00d85116ada8052429822021-02-27 12:02:1222 mins ago Keep3rb Network: CheeseSwapOracle CheeseSwap: WBNB-USDT0 BNB
0x3551f8270e6ee9569a336f65607c7bf6e9320694d180ba333dc00d85116ada8052429822021-02-27 12:02:1222 mins ago Keep3rb Network: CheeseSwapOracle CheeseSwap: WBNB-USDT0 BNB
0x3551f8270e6ee9569a336f65607c7bf6e9320694d180ba333dc00d85116ada8052429822021-02-27 12:02:1222 mins ago Keep3rb Network: CheeseSwapOracle CheeseSwap: WBNB-USDT0 BNB
0x3551f8270e6ee9569a336f65607c7bf6e9320694d180ba333dc00d85116ada8052429822021-02-27 12:02:1222 mins ago Keep3rb Network: CheeseSwapOracle CheeseSwap: KP3RB-WBNB0 BNB
0x3551f8270e6ee9569a336f65607c7bf6e9320694d180ba333dc00d85116ada8052429822021-02-27 12:02:1222 mins ago Keep3rb Network: CheeseSwapOracle CheeseSwap: KP3RB-WBNB0 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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