Contract 0x1cf4579904eb2acda0e4081e39ec10d0c32b5de3

 
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Block
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0xb90970810a3e457c89a3381296b3ea61c7ca2338639d6c942e1eccb8737763c5Set Gov13307722021-09-20 8:01:24372 days 8 hrs agoGMX: Deployer IN  0x1cf4579904eb2acda0e4081e39ec10d0c32b5de30 ETH0.000401792093 ETH
0x8e04ec498784dd604241aaa393ef8f4a83e7d69a1475d88c79b566e662146321Set Token Config13263152021-09-20 6:09:18372 days 10 hrs agoGMX: Deployer IN  0x1cf4579904eb2acda0e4081e39ec10d0c32b5de30 ETH0.000783209726 ETH
0xf947e9211c9008ddeb9cc48d952feacdc33b79c9fa70e6258d7bb5179fc30937Set Token Config13263132021-09-20 6:09:18372 days 10 hrs agoGMX: Deployer IN  0x1cf4579904eb2acda0e4081e39ec10d0c32b5de30 ETH0.000667399399 ETH
0xd845311862703e14b9559421d1aee3eb796047456d7e86836fe72b544605ae12Set Token Config13263092021-09-20 6:09:18372 days 10 hrs agoGMX: Deployer IN  0x1cf4579904eb2acda0e4081e39ec10d0c32b5de30 ETH0.000668193312 ETH
0x3b78a7e9609410d352eeb5f16b72c338fe2b0df90ba3889bcab382935c8c4d60Set Token Config13263042021-09-20 6:09:18372 days 10 hrs agoGMX: Deployer IN  0x1cf4579904eb2acda0e4081e39ec10d0c32b5de30 ETH0.000783216009 ETH
0x870c3e992d25031c3968945c7206292009cc4039f0b567c929235d329a6e8625Set Token Config13263012021-09-20 6:09:18372 days 10 hrs agoGMX: Deployer IN  0x1cf4579904eb2acda0e4081e39ec10d0c32b5de30 ETH0.000665810429 ETH
0xe4603a5935725dc58195e21e41aca958092ca909774644eb9d27062046eda897Set Token Config13262952021-09-20 6:09:18372 days 10 hrs agoGMX: Deployer IN  0x1cf4579904eb2acda0e4081e39ec10d0c32b5de30 ETH0.000667409108 ETH
0x80fbeb94cf594f68f09c3decec32cf2412c63ed0aa500a271a65392f5271b7d3Set Chainlink Fl...13262902021-09-20 6:09:18372 days 10 hrs agoGMX: Deployer IN  0x1cf4579904eb2acda0e4081e39ec10d0c32b5de30 ETH0.000397810242 ETH
0xd653208266c93b4b9db18beab7af68d665361d4ad0ff3592540db6518c562e91Set Is Amm Enabl...13262872021-09-20 6:09:18372 days 10 hrs agoGMX: Deployer IN  0x1cf4579904eb2acda0e4081e39ec10d0c32b5de30 ETH0.000380470364 ETH
0x3946bf9a087be4748a9719bef4b20391dd26f5f4c9950514877dbe446881dc44Set Secondary Pr...13262852021-09-20 6:09:18372 days 10 hrs agoGMX: Deployer IN  0x1cf4579904eb2acda0e4081e39ec10d0c32b5de30 ETH0.000511255963 ETH
0xdeb9c69f0c6aa2ee98f63716a6cb67abb95f32e38ef520afea915307bfcae263Set Price Sample...13262842021-09-20 6:09:18372 days 10 hrs agoGMX: Deployer IN  0x1cf4579904eb2acda0e4081e39ec10d0c32b5de30 ETH0.000381259708 ETH
0xc5779504a8cb827609b5416155941560e0cdb0878d285538281e854d3051eeaeSet Max Strict P...13262792021-09-20 6:09:18372 days 10 hrs agoGMX: Deployer IN  0x1cf4579904eb2acda0e4081e39ec10d0c32b5de30 ETH0.000502578313 ETH
0x186ae8418dc9913a9b8627d55829ab7536cfff3de02135ee9e57794ff923df050x6080604013262772021-09-20 6:09:18372 days 10 hrs agoGMX: Deployer IN  Create: VaultPriceFeed0 ETH0.009333580277 ETH
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0x8c3a397a295e3c4d437d24791170796f3ca962612e78e473e375d51830c00c0240324402021-12-23 2:52:15278 days 13 hrs ago 0x1cf4579904eb2acda0e4081e39ec10d0c32b5de3 0x73fe72c9caa0faf0e488570d5898984783e728df0 ETH
0x8c3a397a295e3c4d437d24791170796f3ca962612e78e473e375d51830c00c0240324402021-12-23 2:52:15278 days 13 hrs ago 0x1cf4579904eb2acda0e4081e39ec10d0c32b5de3 0x3f3f5df88dc9f13eac63df89ec16ef6e7e25dde70 ETH
0x8c3a397a295e3c4d437d24791170796f3ca962612e78e473e375d51830c00c0240324402021-12-23 2:52:15278 days 13 hrs ago 0x1cf4579904eb2acda0e4081e39ec10d0c32b5de3 0x3f3f5df88dc9f13eac63df89ec16ef6e7e25dde70 ETH
0x8c3a397a295e3c4d437d24791170796f3ca962612e78e473e375d51830c00c0240324402021-12-23 2:52:15278 days 13 hrs ago 0x1cf4579904eb2acda0e4081e39ec10d0c32b5de3 0x3c14e07edd0dc67442fa96f1ec6999c57e810a830 ETH
0x8c3a397a295e3c4d437d24791170796f3ca962612e78e473e375d51830c00c0240324402021-12-23 2:52:15278 days 13 hrs ago 0x1cf4579904eb2acda0e4081e39ec10d0c32b5de3 0x73fe72c9caa0faf0e488570d5898984783e728df0 ETH
0x8c3a397a295e3c4d437d24791170796f3ca962612e78e473e375d51830c00c0240324402021-12-23 2:52:15278 days 13 hrs ago 0x1cf4579904eb2acda0e4081e39ec10d0c32b5de3 0x3f3f5df88dc9f13eac63df89ec16ef6e7e25dde70 ETH
0x8c3a397a295e3c4d437d24791170796f3ca962612e78e473e375d51830c00c0240324402021-12-23 2:52:15278 days 13 hrs ago 0x1cf4579904eb2acda0e4081e39ec10d0c32b5de3 0x3f3f5df88dc9f13eac63df89ec16ef6e7e25dde70 ETH
0x8c3a397a295e3c4d437d24791170796f3ca962612e78e473e375d51830c00c0240324402021-12-23 2:52:15278 days 13 hrs ago 0x1cf4579904eb2acda0e4081e39ec10d0c32b5de3 0x3c14e07edd0dc67442fa96f1ec6999c57e810a830 ETH
0x8c3a397a295e3c4d437d24791170796f3ca962612e78e473e375d51830c00c0240324402021-12-23 2:52:15278 days 13 hrs ago 0x1cf4579904eb2acda0e4081e39ec10d0c32b5de3 0x73fe72c9caa0faf0e488570d5898984783e728df0 ETH
0x8c3a397a295e3c4d437d24791170796f3ca962612e78e473e375d51830c00c0240324402021-12-23 2:52:15278 days 13 hrs ago 0x1cf4579904eb2acda0e4081e39ec10d0c32b5de3 0x639fe6ab55c921f74e7fac1ee960c0b6293ba6120 ETH
0x8c3a397a295e3c4d437d24791170796f3ca962612e78e473e375d51830c00c0240324402021-12-23 2:52:15278 days 13 hrs ago 0x1cf4579904eb2acda0e4081e39ec10d0c32b5de3 0x639fe6ab55c921f74e7fac1ee960c0b6293ba6120 ETH
0x8c3a397a295e3c4d437d24791170796f3ca962612e78e473e375d51830c00c0240324402021-12-23 2:52:15278 days 13 hrs ago 0x1cf4579904eb2acda0e4081e39ec10d0c32b5de3 0x3c14e07edd0dc67442fa96f1ec6999c57e810a830 ETH
0x8c3a397a295e3c4d437d24791170796f3ca962612e78e473e375d51830c00c0240324402021-12-23 2:52:15278 days 13 hrs ago 0x489ee077994b6658eafa855c308275ead8097c4a 0x1cf4579904eb2acda0e4081e39ec10d0c32b5de30 ETH
0x8c3a397a295e3c4d437d24791170796f3ca962612e78e473e375d51830c00c0240324402021-12-23 2:52:15278 days 13 hrs ago 0x489ee077994b6658eafa855c308275ead8097c4a 0x1cf4579904eb2acda0e4081e39ec10d0c32b5de30 ETH
0x8c3a397a295e3c4d437d24791170796f3ca962612e78e473e375d51830c00c0240324402021-12-23 2:52:15278 days 13 hrs ago 0x489ee077994b6658eafa855c308275ead8097c4a 0x1cf4579904eb2acda0e4081e39ec10d0c32b5de30 ETH
0xd9de4b32bc24fc34895e4362b36c45c56f472fddeb1669b190a83e7095656c9c40324262021-12-23 2:51:19278 days 13 hrs ago 0x1cf4579904eb2acda0e4081e39ec10d0c32b5de3 0x73fe72c9caa0faf0e488570d5898984783e728df0 ETH
0xd9de4b32bc24fc34895e4362b36c45c56f472fddeb1669b190a83e7095656c9c40324262021-12-23 2:51:19278 days 13 hrs ago 0x1cf4579904eb2acda0e4081e39ec10d0c32b5de3 0x3f3f5df88dc9f13eac63df89ec16ef6e7e25dde70 ETH
0xd9de4b32bc24fc34895e4362b36c45c56f472fddeb1669b190a83e7095656c9c40324262021-12-23 2:51:19278 days 13 hrs ago 0x1cf4579904eb2acda0e4081e39ec10d0c32b5de3 0x3f3f5df88dc9f13eac63df89ec16ef6e7e25dde70 ETH
0xd9de4b32bc24fc34895e4362b36c45c56f472fddeb1669b190a83e7095656c9c40324262021-12-23 2:51:19278 days 13 hrs ago 0x1cf4579904eb2acda0e4081e39ec10d0c32b5de3 0x3c14e07edd0dc67442fa96f1ec6999c57e810a830 ETH
0xd9de4b32bc24fc34895e4362b36c45c56f472fddeb1669b190a83e7095656c9c40324262021-12-23 2:51:19278 days 13 hrs ago 0x1cf4579904eb2acda0e4081e39ec10d0c32b5de3 0x73fe72c9caa0faf0e488570d5898984783e728df0 ETH
0xd9de4b32bc24fc34895e4362b36c45c56f472fddeb1669b190a83e7095656c9c40324262021-12-23 2:51:19278 days 13 hrs ago 0x1cf4579904eb2acda0e4081e39ec10d0c32b5de3 0x3f3f5df88dc9f13eac63df89ec16ef6e7e25dde70 ETH
0xd9de4b32bc24fc34895e4362b36c45c56f472fddeb1669b190a83e7095656c9c40324262021-12-23 2:51:19278 days 13 hrs ago 0x1cf4579904eb2acda0e4081e39ec10d0c32b5de3 0x3f3f5df88dc9f13eac63df89ec16ef6e7e25dde70 ETH
0xd9de4b32bc24fc34895e4362b36c45c56f472fddeb1669b190a83e7095656c9c40324262021-12-23 2:51:19278 days 13 hrs ago 0x1cf4579904eb2acda0e4081e39ec10d0c32b5de3 0x3c14e07edd0dc67442fa96f1ec6999c57e810a830 ETH
0xd9de4b32bc24fc34895e4362b36c45c56f472fddeb1669b190a83e7095656c9c40324262021-12-23 2:51:19278 days 13 hrs ago 0x1cf4579904eb2acda0e4081e39ec10d0c32b5de3 0x73fe72c9caa0faf0e488570d5898984783e728df0 ETH
0xd9de4b32bc24fc34895e4362b36c45c56f472fddeb1669b190a83e7095656c9c40324262021-12-23 2:51:19278 days 13 hrs ago 0x1cf4579904eb2acda0e4081e39ec10d0c32b5de3 0x639fe6ab55c921f74e7fac1ee960c0b6293ba6120 ETH
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Contract Source Code Verified (Exact Match)

Contract Name:
VaultPriceFeed

Compiler Version
v0.6.12+commit.27d51765

Optimization Enabled:
Yes with 1 runs

Other Settings:
default evmVersion

Contract Source Code (Solidity Standard Json-Input format)

File 1 of 7 : VaultPriceFeed.sol
// SPDX-License-Identifier: MIT

import "../libraries/math/SafeMath.sol";

import "./interfaces/IVaultPriceFeed.sol";
import "../oracle/interfaces/IPriceFeed.sol";
import "../oracle/interfaces/ISecondaryPriceFeed.sol";
import "../oracle/interfaces/IChainlinkFlags.sol";
import "../amm/interfaces/IPancakePair.sol";

pragma solidity 0.6.12;

contract VaultPriceFeed is IVaultPriceFeed {
    using SafeMath for uint256;

    uint256 public constant PRICE_PRECISION = 10 ** 30;
    uint256 public constant ONE_USD = PRICE_PRECISION;
    uint256 public constant BASIS_POINTS_DIVISOR = 10000;
    uint256 public constant MAX_SPREAD_BASIS_POINTS = 50;
    uint256 public constant MAX_ADJUSTMENT_INTERVAL = 2 hours;
    uint256 public constant MAX_ADJUSTMENT_BASIS_POINTS = 20;

    // Identifier of the Sequencer offline flag on the Flags contract
    address constant private FLAG_ARBITRUM_SEQ_OFFLINE = address(bytes20(bytes32(uint256(keccak256("chainlink.flags.arbitrum-seq-offline")) - 1)));

    address public gov;
    address public chainlinkFlags;

    bool public isAmmEnabled = true;
    bool public isSecondaryPriceEnabled = true;
    bool public useV2Pricing = false;
    bool public favorPrimaryPrice = false;
    uint256 public priceSampleSpace = 3;
    uint256 public maxStrictPriceDeviation = 0;
    address public secondaryPriceFeed;
    uint256 public spreadThresholdBasisPoints = 30;

    address public btc;
    address public eth;
    address public bnb;
    address public bnbBusd;
    address public ethBnb;
    address public btcBnb;

    mapping (address => address) public priceFeeds;
    mapping (address => uint256) public priceDecimals;
    mapping (address => uint256) public spreadBasisPoints;
    // Chainlink can return prices for stablecoins
    // that differs from 1 USD by a larger percentage than stableSwapFeeBasisPoints
    // we use strictStableTokens to cap the price to 1 USD
    // this allows us to configure stablecoins like DAI as being a stableToken
    // while not being a strictStableToken
    mapping (address => bool) public strictStableTokens;

    mapping (address => uint256) public override adjustmentBasisPoints;
    mapping (address => bool) public override isAdjustmentAdditive;
    mapping (address => uint256) public lastAdjustmentTimings;

    modifier onlyGov() {
        require(msg.sender == gov, "VaultPriceFeed: forbidden");
        _;
    }

    constructor() public {
        gov = msg.sender;
    }

    function setGov(address _gov) external onlyGov {
        gov = _gov;
    }

    function setChainlinkFlags(address _chainlinkFlags) external onlyGov {
        chainlinkFlags = _chainlinkFlags;
    }

    function setAdjustment(address _token, bool _isAdditive, uint256 _adjustmentBps) external override onlyGov {
        require(
            lastAdjustmentTimings[_token].add(MAX_ADJUSTMENT_INTERVAL) < block.timestamp,
            "VaultPriceFeed: adjustment frequency exceeded"
        );
        require(_adjustmentBps <= MAX_ADJUSTMENT_BASIS_POINTS, "invalid _adjustmentBps");
        isAdjustmentAdditive[_token] = _isAdditive;
        adjustmentBasisPoints[_token] = _adjustmentBps;
        lastAdjustmentTimings[_token] = block.timestamp;
    }

    function setUseV2Pricing(bool _useV2Pricing) external override onlyGov {
        useV2Pricing = _useV2Pricing;
    }

    function setIsAmmEnabled(bool _isEnabled) external override onlyGov {
        isAmmEnabled = _isEnabled;
    }

    function setIsSecondaryPriceEnabled(bool _isEnabled) external override onlyGov {
        isSecondaryPriceEnabled = _isEnabled;
    }

    function setSecondaryPriceFeed(address _secondaryPriceFeed) external onlyGov {
        secondaryPriceFeed = _secondaryPriceFeed;
    }

    function setTokens(address _btc, address _eth, address _bnb) external onlyGov {
        btc = _btc;
        eth = _eth;
        bnb = _bnb;
    }

    function setPairs(address _bnbBusd, address _ethBnb, address _btcBnb) external onlyGov {
        bnbBusd = _bnbBusd;
        ethBnb = _ethBnb;
        btcBnb = _btcBnb;
    }

    function setSpreadBasisPoints(address _token, uint256 _spreadBasisPoints) external override onlyGov {
        require(_spreadBasisPoints <= MAX_SPREAD_BASIS_POINTS, "VaultPriceFeed: invalid _spreadBasisPoints");
        spreadBasisPoints[_token] = _spreadBasisPoints;
    }

    function setSpreadThresholdBasisPoints(uint256 _spreadThresholdBasisPoints) external override onlyGov {
        spreadThresholdBasisPoints = _spreadThresholdBasisPoints;
    }

    function setFavorPrimaryPrice(bool _favorPrimaryPrice) external override onlyGov {
        favorPrimaryPrice = _favorPrimaryPrice;
    }

    function setPriceSampleSpace(uint256 _priceSampleSpace) external override onlyGov {
        require(_priceSampleSpace > 0, "VaultPriceFeed: invalid _priceSampleSpace");
        priceSampleSpace = _priceSampleSpace;
    }

    function setMaxStrictPriceDeviation(uint256 _maxStrictPriceDeviation) external override onlyGov {
        maxStrictPriceDeviation = _maxStrictPriceDeviation;
    }

    function setTokenConfig(
        address _token,
        address _priceFeed,
        uint256 _priceDecimals,
        bool _isStrictStable
    ) external onlyGov {
        priceFeeds[_token] = _priceFeed;
        priceDecimals[_token] = _priceDecimals;
        strictStableTokens[_token] = _isStrictStable;
    }

    function getPrice(address _token, bool _maximise, bool _includeAmmPrice, bool /* _useSwapPricing */) public override view returns (uint256) {
        uint256 price = useV2Pricing ? getPriceV2(_token, _maximise, _includeAmmPrice) : getPriceV1(_token, _maximise, _includeAmmPrice);

        uint256 adjustmentBps = adjustmentBasisPoints[_token];
        if (adjustmentBps > 0) {
            bool isAdditive = isAdjustmentAdditive[_token];
            if (isAdditive) {
                price = price.mul(BASIS_POINTS_DIVISOR.add(adjustmentBps)).div(BASIS_POINTS_DIVISOR);
            } else {
                price = price.mul(BASIS_POINTS_DIVISOR.sub(adjustmentBps)).div(BASIS_POINTS_DIVISOR);
            }
        }

        return price;
    }

    function getPriceV1(address _token, bool _maximise, bool _includeAmmPrice) public view returns (uint256) {
        uint256 price = getPrimaryPrice(_token, _maximise);

        if (_includeAmmPrice && isAmmEnabled) {
            uint256 ammPrice = getAmmPrice(_token);
            if (ammPrice > 0) {
                if (_maximise && ammPrice > price) {
                    price = ammPrice;
                }
                if (!_maximise && ammPrice < price) {
                    price = ammPrice;
                }
            }
        }

        if (isSecondaryPriceEnabled) {
            price = getSecondaryPrice(_token, price, _maximise);
        }

        if (strictStableTokens[_token]) {
            uint256 delta = price > ONE_USD ? price.sub(ONE_USD) : ONE_USD.sub(price);
            if (delta <= maxStrictPriceDeviation) {
                return ONE_USD;
            }
        }

        uint256 _spreadBasisPoints = spreadBasisPoints[_token];

        if (_maximise) {
            return price.mul(BASIS_POINTS_DIVISOR.add(_spreadBasisPoints)).div(BASIS_POINTS_DIVISOR);
        }

        return price.mul(BASIS_POINTS_DIVISOR.sub(_spreadBasisPoints)).div(BASIS_POINTS_DIVISOR);
    }

    function getPriceV2(address _token, bool _maximise, bool _includeAmmPrice) public view returns (uint256) {
        uint256 price = getPrimaryPrice(_token, _maximise);

        if (_includeAmmPrice && isAmmEnabled) {
            price = getAmmPriceV2(_token, _maximise, price);
        }

        if (isSecondaryPriceEnabled) {
            price = getSecondaryPrice(_token, price, _maximise);
        }

        if (strictStableTokens[_token]) {
            uint256 delta = price > ONE_USD ? price.sub(ONE_USD) : ONE_USD.sub(price);
            if (delta <= maxStrictPriceDeviation) {
                return ONE_USD;
            }
        }

        uint256 _spreadBasisPoints = spreadBasisPoints[_token];

        if (_maximise) {
            return price.mul(BASIS_POINTS_DIVISOR.add(_spreadBasisPoints)).div(BASIS_POINTS_DIVISOR);
        }

        return price.mul(BASIS_POINTS_DIVISOR.sub(_spreadBasisPoints)).div(BASIS_POINTS_DIVISOR);
    }

    function getAmmPriceV2(address _token, bool _maximise, uint256 _primaryPrice) public view returns (uint256) {
        uint256 ammPrice = getAmmPrice(_token);
        if (ammPrice == 0) {
            return _primaryPrice;
        }

        uint256 diff = ammPrice > _primaryPrice ? ammPrice.sub(_primaryPrice) : _primaryPrice.sub(ammPrice);
        if (diff.mul(BASIS_POINTS_DIVISOR) < _primaryPrice.mul(spreadThresholdBasisPoints)) {
            if (favorPrimaryPrice) {
                return _primaryPrice;
            }
            return ammPrice;
        }

        if (_maximise && ammPrice > _primaryPrice) {
            return ammPrice;
        }

        if (!_maximise && ammPrice < _primaryPrice) {
            return ammPrice;
        }

        return _primaryPrice;
    }

    function getPrimaryPrice(address _token, bool _maximise) public override view returns (uint256) {
        address priceFeedAddress = priceFeeds[_token];
        require(priceFeedAddress != address(0), "VaultPriceFeed: invalid price feed");

        if (chainlinkFlags != address(0)) {
            bool isRaised = IChainlinkFlags(chainlinkFlags).getFlag(FLAG_ARBITRUM_SEQ_OFFLINE);
            if (isRaised) {
                    // If flag is raised we shouldn't perform any critical operations
                revert("Chainlink feeds are not being updated");
            }
        }

        IPriceFeed priceFeed = IPriceFeed(priceFeedAddress);

        uint256 price = 0;
        uint80 roundId = priceFeed.latestRound();

        for (uint80 i = 0; i < priceSampleSpace; i++) {
            if (roundId <= i) { break; }
            uint256 p;

            if (i == 0) {
                int256 _p = priceFeed.latestAnswer();
                require(_p > 0, "VaultPriceFeed: invalid price");
                p = uint256(_p);
            } else {
                (, int256 _p, , ,) = priceFeed.getRoundData(roundId - i);
                require(_p > 0, "VaultPriceFeed: invalid price");
                p = uint256(_p);
            }

            if (price == 0) {
                price = p;
                continue;
            }

            if (_maximise && p > price) {
                price = p;
                continue;
            }

            if (!_maximise && p < price) {
                price = p;
            }
        }

        require(price > 0, "VaultPriceFeed: could not fetch price");
        // normalise price precision
        uint256 _priceDecimals = priceDecimals[_token];
        return price.mul(PRICE_PRECISION).div(10 ** _priceDecimals);
    }

    function getSecondaryPrice(address _token, uint256 _referencePrice, bool _maximise) public view returns (uint256) {
        if (secondaryPriceFeed == address(0)) { return _referencePrice; }
        return ISecondaryPriceFeed(secondaryPriceFeed).getPrice(_token, _referencePrice, _maximise);
    }

    function getAmmPrice(address _token) public override view returns (uint256) {
        if (_token == bnb) {
            // for bnbBusd, reserve0: BNB, reserve1: BUSD
            return getPairPrice(bnbBusd, true);
        }

        if (_token == eth) {
            uint256 price0 = getPairPrice(bnbBusd, true);
            // for ethBnb, reserve0: ETH, reserve1: BNB
            uint256 price1 = getPairPrice(ethBnb, true);
            // this calculation could overflow if (price0 / 10**30) * (price1 / 10**30) is more than 10**17
            return price0.mul(price1).div(PRICE_PRECISION);
        }

        if (_token == btc) {
            uint256 price0 = getPairPrice(bnbBusd, true);
            // for btcBnb, reserve0: BTC, reserve1: BNB
            uint256 price1 = getPairPrice(btcBnb, true);
            // this calculation could overflow if (price0 / 10**30) * (price1 / 10**30) is more than 10**17
            return price0.mul(price1).div(PRICE_PRECISION);
        }

        return 0;
    }

    // if divByReserve0: calculate price as reserve1 / reserve0
    // if !divByReserve1: calculate price as reserve0 / reserve1
    function getPairPrice(address _pair, bool _divByReserve0) public view returns (uint256) {
        (uint256 reserve0, uint256 reserve1, ) = IPancakePair(_pair).getReserves();
        if (_divByReserve0) {
            if (reserve0 == 0) { return 0; }
            return reserve1.mul(PRICE_PRECISION).div(reserve0);
        }
        if (reserve1 == 0) { return 0; }
        return reserve0.mul(PRICE_PRECISION).div(reserve1);
    }
}

File 2 of 7 : SafeMath.sol
// SPDX-License-Identifier: MIT

pragma solidity 0.6.12;

/**
 * @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, 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) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * 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);
        uint256 c = a - b;

        return c;
    }

    /**
     * @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) {
        // 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 0;
        }

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts 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) {
        return div(a, b, "SafeMath: division by zero");
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts with custom message 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, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts 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) {
        return mod(a, b, "SafeMath: modulo by zero");
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts with custom message 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, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}

File 3 of 7 : IVaultPriceFeed.sol
// SPDX-License-Identifier: MIT

pragma solidity 0.6.12;

interface IVaultPriceFeed {
    function adjustmentBasisPoints(address _token) external view returns (uint256);
    function isAdjustmentAdditive(address _token) external view returns (bool);
    function setAdjustment(address _token, bool _isAdditive, uint256 _adjustmentBps) external;
    function setUseV2Pricing(bool _useV2Pricing) external;
    function setIsAmmEnabled(bool _isEnabled) external;
    function setIsSecondaryPriceEnabled(bool _isEnabled) external;
    function setSpreadBasisPoints(address _token, uint256 _spreadBasisPoints) external;
    function setSpreadThresholdBasisPoints(uint256 _spreadThresholdBasisPoints) external;
    function setFavorPrimaryPrice(bool _favorPrimaryPrice) external;
    function setPriceSampleSpace(uint256 _priceSampleSpace) external;
    function setMaxStrictPriceDeviation(uint256 _maxStrictPriceDeviation) external;
    function getPrice(address _token, bool _maximise, bool _includeAmmPrice, bool _useSwapPricing) external view returns (uint256);
    function getAmmPrice(address _token) external view returns (uint256);
    function getPrimaryPrice(address _token, bool _maximise) external view returns (uint256);
}

File 4 of 7 : IPriceFeed.sol
// SPDX-License-Identifier: MIT

pragma solidity 0.6.12;

interface IPriceFeed {
    function description() external view returns (string memory);
    function aggregator() external view returns (address);
    function latestAnswer() external view returns (int256);
    function latestRound() external view returns (uint80);
    function getRoundData(uint80 roundId) external view returns (uint80, int256, uint256, uint256, uint80);
}

File 5 of 7 : ISecondaryPriceFeed.sol
// SPDX-License-Identifier: MIT

pragma solidity 0.6.12;

interface ISecondaryPriceFeed {
    function getPrice(address _token, uint256 _referencePrice, bool _maximise) external view returns (uint256);
}

File 6 of 7 : IChainlinkFlags.sol
// SPDX-License-Identifier: MIT

pragma solidity 0.6.12;

interface IChainlinkFlags {
  function getFlag(address) external view returns (bool);
}

File 7 of 7 : IPancakePair.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.5.0;

interface IPancakePair {
    function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
}

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 1
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  },
  "libraries": {}
}

Contract ABI

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ool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"isAmmEnabled","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"isSecondaryPriceEnabled","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"lastAdjustmentTimings","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"maxStrictPriceDeviation","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"priceDecimals","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"priceFeeds","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"priceSampleSpace","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"secondaryPriceFeed","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"},{"internalType":"bool","name":"_isAdditive","type":"bool"},{"internalType":"uint256","name":"_adjustmentBps","type":"uint256"}],"name":"setAdjustment","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_chainlinkFlags","type":"address"}],"name":"setChainlinkFlags","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bool","name":"_favorPrimaryPrice","type":"bool"}],"name":"setFavorPrimaryPrice","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_gov","type":"address"}],"name":"setGov","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bool","name":"_isEnabled","type":"bool"}],"name":"setIsAmmEnabled","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bool","name":"_isEnabled","type":"bool"}],"name":"setIsSecondaryPriceEnabled","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_maxStrictPriceDeviation","type":"uint256"}],"name":"setMaxStrictPriceDeviation","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_bnbBusd","type":"address"},{"internalType":"address","name":"_ethBnb","type":"address"},{"internalType":"address","name":"_btcBnb","type":"address"}],"name":"setPairs","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_priceSampleSpace","type":"uint256"}],"name":"setPriceSampleSpace","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_secondaryPriceFeed","type":"address"}],"name":"setSecondaryPriceFeed","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"},{"internalType":"uint256","name":"_spreadBasisPoints","type":"uint256"}],"name":"setSpreadBasisPoints","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_spreadThresholdBasisPoints","type":"uint256"}],"name":"setSpreadThresholdBasisPoints","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"},{"internalType":"address","name":"_priceFeed","type":"address"},{"internalType":"uint256","name":"_priceDecimals","type":"uint256"},{"internalType":"bool","name":"_isStrictStable","type":"bool"}],"name":"setTokenConfig","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_btc","type":"address"},{"internalType":"address","name":"_eth","type":"address"},{"internalType":"address","name":"_bnb","type":"address"}],"name":"setTokens","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bool","name":"_useV2Pricing","type":"bool"}],"name":"setUseV2Pricing","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"spreadBasisPoints","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"spreadThresholdBasisPoints","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"strictStableTokens","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"useV2Pricing","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"}]

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