Contract 0xa4eDe2C4CB210CD07DaFbCe56dA8d36b7d688cd0

 
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Contract Source Code Verified (Exact Match)

Contract Name:
PerpetualPoolLite

Compiler Version
v0.8.4+commit.c7e474f2

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion

Contract Source Code (Solidity Standard Json-Input format)

File 1 of 17 : PerpetualPoolLite.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0 <0.9.0;

import '../interface/IPerpetualPoolLite.sol';
import '../interface/ILTokenLite.sol';
import '../interface/IPTokenLite.sol';
import '../interface/IERC20.sol';
import '../interface/IOracle.sol';
import '../interface/IOracleWithUpdate.sol';
import '../interface/ILiquidatorQualifier.sol';
import '../library/SafeMath.sol';
import '../library/SafeERC20.sol';
import '../utils/Migratable.sol';

contract PerpetualPoolLite is IPerpetualPoolLite, Migratable {

    using SafeMath for uint256;
    using SafeMath for int256;
    using SafeERC20 for IERC20;

    int256  constant ONE = 10**18;

    uint256 immutable _decimals;
    int256  immutable _minPoolMarginRatio;
    int256  immutable _minInitialMarginRatio;
    int256  immutable _minMaintenanceMarginRatio;
    int256  immutable _minLiquidationReward;
    int256  immutable _maxLiquidationReward;
    int256  immutable _liquidationCutRatio;
    int256  immutable _protocolFeeCollectRatio;

    address immutable _bTokenAddress;
    address immutable _lTokenAddress;
    address immutable _pTokenAddress;
    address immutable _liquidatorQualifierAddress;
    address immutable _protocolFeeCollector;

    int256  _liquidity;

    uint256 _lastUpdateBlock;
    int256  _protocolFeeAccrued;

    // symbolId => SymbolInfo
    mapping (uint256 => SymbolInfo) _symbols;

    bool private _mutex;
    modifier _lock_() {
        require(!_mutex, 'reentry');
        _mutex = true;
        _;
        _mutex = false;
    }

    constructor (uint256[7] memory parameters, address[5] memory addresses) {
        _controller = msg.sender;

        _minPoolMarginRatio = int256(parameters[0]);
        _minInitialMarginRatio = int256(parameters[1]);
        _minMaintenanceMarginRatio = int256(parameters[2]);
        _minLiquidationReward = int256(parameters[3]);
        _maxLiquidationReward = int256(parameters[4]);
        _liquidationCutRatio = int256(parameters[5]);
        _protocolFeeCollectRatio = int256(parameters[6]);

        _bTokenAddress = addresses[0];
        _lTokenAddress = addresses[1];
        _pTokenAddress = addresses[2];
        _liquidatorQualifierAddress = addresses[3];
        _protocolFeeCollector = addresses[4];

        _decimals = IERC20(addresses[0]).decimals();
    }

    // during a migration, this function is intended to be called in the source pool
    function approveMigration() external override _controller_ {
        require(_migrationTimestamp != 0 && block.timestamp >= _migrationTimestamp, 'PerpetualPool: migrationTimestamp not met yet');
        // approve new pool to pull all base tokens from this pool
        IERC20(_bTokenAddress).safeApprove(_migrationDestination, type(uint256).max);
        // set lToken/pToken to new pool, after redirecting pToken/lToken to new pool, this pool will stop functioning
        ILTokenLite(_lTokenAddress).setPool(_migrationDestination);
        IPTokenLite(_pTokenAddress).setPool(_migrationDestination);
    }

    // during a migration, this function is intended to be called in the target pool
    function executeMigration(address source) external override _controller_ {
        uint256 migrationTimestamp_ = IPerpetualPoolLite(source).migrationTimestamp();
        address migrationDestination_ = IPerpetualPoolLite(source).migrationDestination();
        require(migrationTimestamp_ != 0 && block.timestamp >= migrationTimestamp_, 'PerpetualPool: migrationTimestamp not met yet');
        require(migrationDestination_ == address(this), 'PerpetualPool: not destination pool');

        // transfer bToken to this address
        IERC20(_bTokenAddress).safeTransferFrom(source, address(this), IERC20(_bTokenAddress).balanceOf(source));

        // transfer symbol infos
        uint256[] memory symbolIds = IPTokenLite(_pTokenAddress).getActiveSymbolIds();
        for (uint256 i = 0; i < symbolIds.length; i++) {
            _symbols[symbolIds[i]] = IPerpetualPoolLite(source).getSymbol(symbolIds[i]);
        }

        // transfer state values
        _liquidity = IPerpetualPoolLite(source).getLiquidity();
        _lastUpdateBlock = IPerpetualPoolLite(source).getLastUpdateBlock();
        _protocolFeeAccrued = IPerpetualPoolLite(source).getProtocolFeeAccrued();

        emit ExecuteMigration(migrationTimestamp_, source, migrationDestination_);
    }

    function getParameters() external override view returns (
        int256 minPoolMarginRatio,
        int256 minInitialMarginRatio,
        int256 minMaintenanceMarginRatio,
        int256 minLiquidationReward,
        int256 maxLiquidationReward,
        int256 liquidationCutRatio,
        int256 protocolFeeCollectRatio
    ) {
        return (
            _minPoolMarginRatio,
            _minInitialMarginRatio,
            _minMaintenanceMarginRatio,
            _minLiquidationReward,
            _maxLiquidationReward,
            _liquidationCutRatio,
            _protocolFeeCollectRatio
        );
    }

    function getAddresses() external override view returns (
        address bTokenAddress,
        address lTokenAddress,
        address pTokenAddress,
        address liquidatorQualifierAddress,
        address protocolFeeCollector
    ) {
        return (
            _bTokenAddress,
            _lTokenAddress,
            _pTokenAddress,
            _liquidatorQualifierAddress,
            _protocolFeeCollector
        );
    }

    function getSymbol(uint256 symbolId) external override view returns (SymbolInfo memory) {
        return _symbols[symbolId];
    }

    function getLiquidity() external override view returns (int256) {
        return _liquidity;
    }

    function getLastUpdateBlock() external override view returns (uint256) {
        return _lastUpdateBlock;
    }

    function getProtocolFeeAccrued() external override view returns (int256) {
        return _protocolFeeAccrued;
    }

    function collectProtocolFee() external override {
        uint256 balance = IERC20(_bTokenAddress).balanceOf(address(this)).rescale(_decimals, 18);
        uint256 amount = _protocolFeeAccrued.itou();
        if (amount > balance) amount = balance;
        _protocolFeeAccrued -= amount.utoi();
        _transferOut(_protocolFeeCollector, amount);
        emit ProtocolFeeCollection(_protocolFeeCollector, amount);
    }

    function addSymbol(
        uint256 symbolId,
        string  memory symbol,
        address oracleAddress,
        uint256 multiplier,
        uint256 feeRatio,
        uint256 fundingRateCoefficient
    ) external override _controller_ {
        SymbolInfo storage s = _symbols[symbolId];
        s.symbolId = symbolId;
        s.symbol = symbol;
        s.oracleAddress = oracleAddress;
        s.multiplier = int256(multiplier);
        s.feeRatio = int256(feeRatio);
        s.fundingRateCoefficient = int256(fundingRateCoefficient);

        IPTokenLite(_pTokenAddress).addSymbolId(symbolId);
    }

    function removeSymbol(uint256 symbolId) external override _controller_ {
        delete _symbols[symbolId];
        IPTokenLite(_pTokenAddress).removeSymbolId(symbolId);
    }

    function toggleCloseOnly(uint256 symbolId) external override _controller_ {
        IPTokenLite(_pTokenAddress).toggleCloseOnly(symbolId);
    }

    function setSymbolParameters(uint256 symbolId, address oracleAddress, uint256 feeRatio, uint256 fundingRateCoefficient) external override _controller_ {
        SymbolInfo storage s = _symbols[symbolId];
        s.oracleAddress = oracleAddress;
        s.feeRatio = int256(feeRatio);
        s.fundingRateCoefficient = int256(fundingRateCoefficient);
    }


    //================================================================================
    // Interactions with onchain oracles
    //================================================================================

    function addLiquidity(uint256 bAmount) external override {
        require(bAmount > 0, 'PerpetualPool: 0 bAmount');
        _addLiquidity(msg.sender, bAmount);
    }

    function removeLiquidity(uint256 lShares) external override {
        require(lShares > 0, 'PerpetualPool: 0 lShares');
        _removeLiquidity(msg.sender, lShares);
    }

    function addMargin(uint256 bAmount) external override {
        require(bAmount > 0, 'PerpetualPool: 0 bAmount');
        _addMargin(msg.sender, bAmount);
    }

    function removeMargin(uint256 bAmount) external override {
        require(bAmount > 0, 'PerpetualPool: 0 bAmount');
        _removeMargin(msg.sender, bAmount);
    }

    function trade(uint256 symbolId, int256 tradeVolume) external override {
        require(IPTokenLite(_pTokenAddress).isActiveSymbolId(symbolId), 'PerpetualPool: invalid symbolId');
        require(tradeVolume != 0 && tradeVolume / ONE * ONE == tradeVolume, 'PerpetualPool: invalid tradeVolume');
        _trade(msg.sender, symbolId, tradeVolume);
    }

    function liquidate(address account) external override {
        address liquidator = msg.sender;
        require(
            _liquidatorQualifierAddress == address(0) || ILiquidatorQualifier(_liquidatorQualifierAddress).isQualifiedLiquidator(liquidator),
            'PerpetualPool: not qualified liquidator'
        );
        _liquidate(liquidator, account);
    }


    //================================================================================
    // Interactions with offchain oracles
    //================================================================================

    function addLiquidity(uint256 bAmount, SignedPrice[] memory prices) external override {
        require(bAmount > 0, 'PerpetualPool: 0 bAmount');
        _updateSymbolOracles(prices);
        _addLiquidity(msg.sender, bAmount);
    }

    function removeLiquidity(uint256 lShares, SignedPrice[] memory prices) external override {
        require(lShares > 0, 'PerpetualPool: 0 lShares');
        _updateSymbolOracles(prices);
        _removeLiquidity(msg.sender, lShares);
    }

    function addMargin(uint256 bAmount, SignedPrice[] memory prices) external override {
        require(bAmount > 0, 'PerpetualPool: 0 bAmount');
        _updateSymbolOracles(prices);
        _addMargin(msg.sender, bAmount);
    }

    function removeMargin(uint256 bAmount, SignedPrice[] memory prices) external override {
        require(bAmount > 0, 'PerpetualPool: 0 bAmount');
        _updateSymbolOracles(prices);
        _removeMargin(msg.sender, bAmount);
    }

    function trade(uint256 symbolId, int256 tradeVolume, SignedPrice[] memory prices) external override {
        require(IPTokenLite(_pTokenAddress).isActiveSymbolId(symbolId), 'PerpetualPool: invalid symbolId');
        require(tradeVolume != 0 && tradeVolume / ONE * ONE == tradeVolume, 'PerpetualPool: invalid tradeVolume');
        _updateSymbolOracles(prices);
        _trade(msg.sender, symbolId, tradeVolume);
    }

    function liquidate(address account, SignedPrice[] memory prices) external override {
        address liquidator = msg.sender;
        require(
            _liquidatorQualifierAddress == address(0) || ILiquidatorQualifier(_liquidatorQualifierAddress).isQualifiedLiquidator(liquidator),
            'PerpetualPool: not qualified liquidator'
        );
        _updateSymbolOracles(prices);
        _liquidate(liquidator, account);
    }


    //================================================================================
    // Core logics
    //================================================================================

    function _addLiquidity(address account, uint256 bAmount) internal _lock_ {
        (int256 totalDynamicEquity, ) = _updateSymbolPricesAndFundingRates();
        bAmount = _transferIn(account, bAmount);
        ILTokenLite lToken = ILTokenLite(_lTokenAddress);

        uint256 totalSupply = lToken.totalSupply();
        uint256 lShares;
        if (totalSupply == 0) {
            lShares = bAmount;
        } else {
            lShares = bAmount * totalSupply / totalDynamicEquity.itou();
        }

        lToken.mint(account, lShares);
        _liquidity += bAmount.utoi();

        emit AddLiquidity(account, lShares, bAmount);
    }

    function _removeLiquidity(address account, uint256 lShares) internal _lock_ {
        (int256 totalDynamicEquity, int256 totalAbsCost) = _updateSymbolPricesAndFundingRates();
        ILTokenLite lToken = ILTokenLite(_lTokenAddress);

        uint256 totalSupply = lToken.totalSupply();
        uint256 bAmount = lShares * totalDynamicEquity.itou() / totalSupply;

        _liquidity -= bAmount.utoi();

        require(
            totalAbsCost == 0 || (totalDynamicEquity - bAmount.utoi()) * ONE / totalAbsCost >= _minPoolMarginRatio,
            'PerpetualPool: pool insufficient margin'
        );

        lToken.burn(account, lShares);
        _transferOut(account, bAmount);

        emit RemoveLiquidity(account, lShares, bAmount);
    }

    function _addMargin(address account, uint256 bAmount) internal _lock_ {
        bAmount = _transferIn(account, bAmount);

        IPTokenLite pToken = IPTokenLite(_pTokenAddress);
        if (!pToken.exists(account)) pToken.mint(account);

        pToken.addMargin(account, bAmount.utoi());
        emit AddMargin(account, bAmount);
    }

    function _removeMargin(address account, uint256 bAmount) internal _lock_ {
        _updateSymbolPricesAndFundingRates();
        (uint256[] memory symbolIds,
         IPTokenLite.Position[] memory positions,
         bool[] memory positionUpdates,
         int256 margin) = _settleTraderFundingFee(account);

        int256 amount = bAmount.utoi();
        if (amount >= margin) {
            amount = margin;
            bAmount = amount.itou();
            margin = 0;
        } else {
            margin -= amount;
        }

        require(_getTraderMarginRatio(symbolIds, positions, margin) >= _minInitialMarginRatio, 'PerpetualPool: insufficient margin');

        _updateTraderPortfolio(account, symbolIds, positions, positionUpdates, margin);
        _transferOut(account, bAmount);

        emit RemoveMargin(account, bAmount);
    }

    // struct for temp use in trade function, to prevent stack too deep error
    struct TradeParams {
        int256 tradersNetVolume;
        int256 price;
        int256 multiplier;
        int256 curCost;
        int256 fee;
        int256 realizedCost;
        int256 protocolFee;
    }

    function _trade(address account, uint256 symbolId, int256 tradeVolume) internal _lock_ {
        (int256 totalDynamicEquity, int256 totalAbsCost) = _updateSymbolPricesAndFundingRates();
        (uint256[] memory symbolIds,
         IPTokenLite.Position[] memory positions,
         bool[] memory positionUpdates,
         int256 margin) = _settleTraderFundingFee(account);

        uint256 index;
        for (uint256 i = 0; i < symbolIds.length; i++) {
            if (symbolId == symbolIds[i]) {
                index = i;
                break;
            }
        }

        TradeParams memory params;

        params.tradersNetVolume = _symbols[symbolId].tradersNetVolume;
        params.price = _symbols[symbolId].price;
        params.multiplier = _symbols[symbolId].multiplier;
        params.curCost = tradeVolume * params.price / ONE * params.multiplier / ONE;
        params.fee = params.curCost.abs() * _symbols[symbolId].feeRatio / ONE;

        if (!(positions[index].volume >= 0 && tradeVolume >= 0) && !(positions[index].volume <= 0 && tradeVolume <= 0)) {
            int256 absVolume = positions[index].volume.abs();
            int256 absTradeVolume = tradeVolume.abs();
            if (absVolume <= absTradeVolume) {
                // previous position is totally closed
                params.realizedCost = params.curCost * absVolume / absTradeVolume + positions[index].cost;
            } else {
                // previous position is partially closed
                params.realizedCost = positions[index].cost * absTradeVolume / absVolume + params.curCost;
            }
        }

        // adjust totalAbsCost after trading
        totalAbsCost += ((params.tradersNetVolume + tradeVolume).abs() - params.tradersNetVolume.abs()) *
                        params.price / ONE * params.multiplier / ONE;

        positions[index].volume += tradeVolume;
        positions[index].cost += params.curCost - params.realizedCost;
        positions[index].lastCumulativeFundingRate = _symbols[symbolId].cumulativeFundingRate;
        margin -= params.fee + params.realizedCost;
        positionUpdates[index] = true;

        _symbols[symbolId].tradersNetVolume += tradeVolume;
        _symbols[symbolId].tradersNetCost += params.curCost - params.realizedCost;
        params.protocolFee = params.fee * _protocolFeeCollectRatio / ONE;
        _protocolFeeAccrued += params.protocolFee;
        _liquidity += params.fee - params.protocolFee + params.realizedCost;

        require(totalAbsCost == 0 || totalDynamicEquity * ONE / totalAbsCost >= _minPoolMarginRatio, 'PerpetualPool: insufficient liquidity');
        require(_getTraderMarginRatio(symbolIds, positions, margin) >= _minInitialMarginRatio, 'PerpetualPool: insufficient margin');

        _updateTraderPortfolio(account, symbolIds, positions, positionUpdates, margin);

        emit Trade(account, symbolId, tradeVolume, params.price.itou());
    }

    function _liquidate(address liquidator, address account) internal _lock_ {
        _updateSymbolPricesAndFundingRates();
        (uint256[] memory symbolIds, IPTokenLite.Position[] memory positions, , int256 margin) = _settleTraderFundingFee(account);
        require(_getTraderMarginRatio(symbolIds, positions, margin) < _minMaintenanceMarginRatio, 'PerpetualPool: cannot liquidate');

        int256 netEquity = margin;
        for (uint256 i = 0; i < symbolIds.length; i++) {
            if (positions[i].volume != 0) {
                _symbols[symbolIds[i]].tradersNetVolume -= positions[i].volume;
                _symbols[symbolIds[i]].tradersNetCost -= positions[i].cost;
                netEquity += positions[i].volume * _symbols[symbolIds[i]].price / ONE * _symbols[symbolIds[i]].multiplier / ONE - positions[i].cost;
            }
        }

        int256 reward;
        if (netEquity <= _minLiquidationReward) {
            reward = _minLiquidationReward;
        } else if (netEquity >= _maxLiquidationReward) {
            reward = _maxLiquidationReward;
        } else {
            reward = (netEquity - _minLiquidationReward) * _liquidationCutRatio / ONE + _minLiquidationReward;
        }

        _liquidity += margin - reward;
        IPTokenLite(_pTokenAddress).burn(account);
        _transferOut(liquidator, reward.itou());

        emit Liquidate(account, liquidator, reward.itou());
    }


    //================================================================================
    // Helpers
    //================================================================================

    function _updateSymbolOracles(SignedPrice[] memory prices) internal {
        for (uint256 i = 0; i < prices.length; i++) {
            uint256 symbolId = prices[i].symbolId;
            IOracleWithUpdate(_symbols[symbolId].oracleAddress).updatePrice(
                prices[i].timestamp,
                prices[i].price,
                prices[i].v,
                prices[i].r,
                prices[i].s
            );
        }
    }

    function _updateSymbolPricesAndFundingRates() internal returns (int256 totalDynamicEquity, int256 totalAbsCost) {
        uint256 preBlockNumber = _lastUpdateBlock;
        uint256 curBlockNumber = block.number;
        uint256[] memory symbolIds = IPTokenLite(_pTokenAddress).getActiveSymbolIds();
        totalDynamicEquity = _liquidity;

        for (uint256 i = 0; i < symbolIds.length; i++) {
            SymbolInfo storage s = _symbols[symbolIds[i]];
            if (curBlockNumber > preBlockNumber) {
                s.price = IOracle(s.oracleAddress).getPrice().utoi();
            }
            if (s.tradersNetVolume != 0) {
                int256 cost = s.tradersNetVolume * s.price / ONE * s.multiplier / ONE;
                totalDynamicEquity -= cost - s.tradersNetCost;
                totalAbsCost += cost.abs();
            }
        }

        if (curBlockNumber > preBlockNumber) {
            for (uint256 i = 0; i < symbolIds.length; i++) {
                SymbolInfo storage s = _symbols[symbolIds[i]];
                if (s.tradersNetVolume != 0) {
                    int256 ratePerBlock = s.tradersNetVolume * s.price / ONE * s.price / ONE * s.multiplier / ONE * s.multiplier / ONE * s.fundingRateCoefficient / totalDynamicEquity;
                    int256 delta = ratePerBlock * int256(curBlockNumber - preBlockNumber);
                    unchecked { s.cumulativeFundingRate += delta; }
                }
            }
        }

        _lastUpdateBlock = curBlockNumber;
    }

    function _getTraderPortfolio(address account) internal view returns (
        uint256[] memory symbolIds,
        IPTokenLite.Position[] memory positions,
        bool[] memory positionUpdates,
        int256 margin
    ) {
        IPTokenLite pToken = IPTokenLite(_pTokenAddress);
        symbolIds = pToken.getActiveSymbolIds();

        positions = new IPTokenLite.Position[](symbolIds.length);
        positionUpdates = new bool[](symbolIds.length);
        for (uint256 i = 0; i < symbolIds.length; i++) {
            positions[i] = pToken.getPosition(account, symbolIds[i]);
        }

        margin = pToken.getMargin(account);
    }

    function _updateTraderPortfolio(
        address account,
        uint256[] memory symbolIds,
        IPTokenLite.Position[] memory positions,
        bool[] memory positionUpdates,
        int256 margin
    ) internal {
        IPTokenLite pToken = IPTokenLite(_pTokenAddress);
        for (uint256 i = 0; i < symbolIds.length; i++) {
            if (positionUpdates[i]) {
                pToken.updatePosition(account, symbolIds[i], positions[i]);
            }
        }
        pToken.updateMargin(account, margin);
    }

    function _settleTraderFundingFee(address account) internal returns (
        uint256[] memory symbolIds,
        IPTokenLite.Position[] memory positions,
        bool[] memory positionUpdates,
        int256 margin
    ) {
        (symbolIds, positions, positionUpdates, margin) = _getTraderPortfolio(account);
        int256 funding;
        for (uint256 i = 0; i < symbolIds.length; i++) {
            if (positions[i].volume != 0) {
                int256 cumulativeFundingRate = _symbols[symbolIds[i]].cumulativeFundingRate;
                int256 delta;
                unchecked { delta = cumulativeFundingRate - positions[i].lastCumulativeFundingRate; }
                funding += positions[i].volume * delta / ONE;

                positions[i].lastCumulativeFundingRate = cumulativeFundingRate;
                positionUpdates[i] = true;
            }
        }
        if (funding != 0) {
            margin -= funding;
            _liquidity += funding;
        }
    }

    function _getTraderMarginRatio(
        uint256[] memory symbolIds,
        IPTokenLite.Position[] memory positions,
        int256 margin
    ) internal view returns (int256) {
        int256 totalDynamicEquity = margin;
        int256 totalAbsCost;
        for (uint256 i = 0; i < symbolIds.length; i++) {
            if (positions[i].volume != 0) {
                int256 cost = positions[i].volume * _symbols[symbolIds[i]].price / ONE * _symbols[symbolIds[i]].multiplier / ONE;
                totalDynamicEquity += cost - positions[i].cost;
                totalAbsCost += cost.abs();
            }
        }
        return totalAbsCost == 0 ? type(int256).max : totalDynamicEquity * ONE / totalAbsCost;
    }

    function _deflationCompatibleSafeTransferFrom(address from, address to, uint256 bAmount) internal returns (uint256) {
        IERC20 bToken = IERC20(_bTokenAddress);
        uint256 balance1 = bToken.balanceOf(to);
        bToken.safeTransferFrom(from, to, bAmount);
        uint256 balance2 = bToken.balanceOf(to);
        return balance2 - balance1;
    }

    function _transferIn(address from, uint256 bAmount) internal returns (uint256) {
        uint256 amount = _deflationCompatibleSafeTransferFrom(from, address(this), bAmount.rescale(18, _decimals));
        return amount.rescale(_decimals, 18);
    }

    function _transferOut(address to, uint256 bAmount) internal {
        uint256 amount = bAmount.rescale(18, _decimals);
        uint256 leftover = bAmount - amount.rescale(_decimals, 18);
        // leftover due to decimal precision is accrued to _protocolFeeAccrued
        _protocolFeeAccrued += leftover.utoi();
        IERC20(_bTokenAddress).safeTransfer(to, amount);
    }

}

File 2 of 17 : IPerpetualPoolLite.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0 <0.9.0;

import '../interface/IMigratable.sol';

interface IPerpetualPoolLite is IMigratable {

    struct SymbolInfo {
        uint256 symbolId;
        string  symbol;
        address oracleAddress;
        int256  multiplier;
        int256  feeRatio;
        int256  fundingRateCoefficient;
        int256  price;
        int256  cumulativeFundingRate;
        int256  tradersNetVolume;
        int256  tradersNetCost;
    }

    struct SignedPrice {
        uint256 symbolId;
        uint256 timestamp;
        uint256 price;
        uint8   v;
        bytes32 r;
        bytes32 s;
    }

    event AddLiquidity(address indexed account, uint256 lShares, uint256 bAmount);

    event RemoveLiquidity(address indexed account, uint256 lShares, uint256 bAmount);

    event AddMargin(address indexed account, uint256 bAmount);

    event RemoveMargin(address indexed account, uint256 bAmount);

    event Trade(address indexed account, uint256 indexed symbolId, int256 tradeVolume, uint256 price);

    event Liquidate(address indexed account, address indexed liquidator, uint256 reward);

    event ProtocolFeeCollection(address indexed collector, uint256 amount);

    function getParameters() external view returns (
        int256 minPoolMarginRatio,
        int256 minInitialMarginRatio,
        int256 minMaintenanceMarginRatio,
        int256 minLiquidationReward,
        int256 maxLiquidationReward,
        int256 liquidationCutRatio,
        int256 protocolFeeCollectRatio
    );

    function getAddresses() external view returns (
        address bTokenAddress,
        address lTokenAddress,
        address pTokenAddress,
        address liquidatorQualifierAddress,
        address protocolFeeCollector
    );

    function getSymbol(uint256 symbolId) external view returns (SymbolInfo memory);

    function getLiquidity() external view returns (int256);

    function getLastUpdateBlock() external view returns (uint256);

    function getProtocolFeeAccrued() external view returns (int256);

    function collectProtocolFee() external;

    function addSymbol(
        uint256 symbolId,
        string  memory symbol,
        address oracleAddress,
        uint256 multiplier,
        uint256 feeRatio,
        uint256 fundingRateCoefficient
    ) external;

    function removeSymbol(uint256 symbolId) external;

    function toggleCloseOnly(uint256 symbolId) external;

    function setSymbolParameters(uint256 symbolId, address oracleAddress, uint256 feeRatio, uint256 fundingRateCoefficient) external;

    function addLiquidity(uint256 bAmount) external;

    function removeLiquidity(uint256 lShares) external;

    function addMargin(uint256 bAmount) external;

    function removeMargin(uint256 bAmount) external;

    function trade(uint256 symbolId, int256 tradeVolume) external;

    function liquidate(address account) external;

    function addLiquidity(uint256 bAmount, SignedPrice[] memory prices) external;

    function removeLiquidity(uint256 lShares, SignedPrice[] memory prices) external;

    function addMargin(uint256 bAmount, SignedPrice[] memory prices) external;

    function removeMargin(uint256 bAmount, SignedPrice[] memory prices) external;

    function trade(uint256 symbolId, int256 tradeVolume, SignedPrice[] memory prices) external;

    function liquidate(address account, SignedPrice[] memory prices) external;

}

File 3 of 17 : ILTokenLite.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0 <0.9.0;

import './IERC20.sol';

interface ILTokenLite is IERC20 {

    function pool() external view returns (address);

    function setPool(address newPool) external;

    function mint(address account, uint256 amount) external;

    function burn(address account, uint256 amount) external;

}

File 4 of 17 : IPTokenLite.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0 <0.9.0;

import './IERC721.sol';

interface IPTokenLite is IERC721 {

    struct Position {
        // position volume, long is positive and short is negative
        int256 volume;
        // the cost the establish this position
        int256 cost;
        // the last cumulativeFundingRate since last funding settlement for this position
        // the overflow for this value in intended
        int256 lastCumulativeFundingRate;
    }

    event UpdateMargin(address indexed owner, int256 amount);

    event UpdatePosition(address indexed owner, uint256 indexed symbolId, int256 volume, int256 cost, int256 lastCumulativeFundingRate);

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

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

    function pool() external view returns (address);

    function totalMinted() external view returns (uint256);

    function totalSupply() external view returns (uint256);

    function setPool(address newPool) external;

    function getActiveSymbolIds() external view returns (uint256[] memory);

    function isActiveSymbolId(uint256 symbolId) external view returns (bool);

    function getNumPositionHolders(uint256 symbolId) external view returns (uint256);

    function addSymbolId(uint256 symbolId) external;

    function removeSymbolId(uint256 symbolId) external;

    function toggleCloseOnly(uint256 symbolId) external;

    function exists(address owner) external view returns (bool);

    function getMargin(address owner) external view returns (int256);

    function updateMargin(address owner, int256 margin) external;

    function addMargin(address owner, int256 delta) external;

    function getPosition(address owner, uint256 symbolId) external view returns (Position memory);

    function updatePosition(address owner, uint256 symbolId, Position memory position) external;

    function mint(address owner) external;

    function burn(address owner) external;

}

File 5 of 17 : IERC20.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0 <0.9.0;

interface IERC20 {

    event Approval(address indexed owner, address indexed spender, uint256 amount);

    event Transfer(address indexed from, address indexed to, uint256 amount);

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

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

    function decimals() external view returns (uint8);

    function totalSupply() external view returns (uint256);

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

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

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

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

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

}

File 6 of 17 : IOracle.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0 <0.9.0;

interface IOracle {

    function getPrice() external returns (uint256);

}

File 7 of 17 : IOracleWithUpdate.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0 <0.9.0;

interface IOracleWithUpdate {

    function getPrice() external returns (uint256);

    function updatePrice(uint256 timestamp, uint256 price, uint8 v, bytes32 r, bytes32 s) external;

}

File 8 of 17 : ILiquidatorQualifier.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0 <0.9.0;

interface ILiquidatorQualifier {

    function isQualifiedLiquidator(address liquidator) external view returns (bool);

}

File 9 of 17 : SafeMath.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0 <0.9.0;

library SafeMath {

    uint256 constant UMAX = 2**255 - 1;
    int256  constant IMIN = -2**255;

    /// convert uint256 to int256
    function utoi(uint256 a) internal pure returns (int256) {
        require(a <= UMAX, 'UIO');
        return int256(a);
    }

    /// convert int256 to uint256
    function itou(int256 a) internal pure returns (uint256) {
        require(a >= 0, 'IUO');
        return uint256(a);
    }

    /// take abs of int256
    function abs(int256 a) internal pure returns (int256) {
        require(a != IMIN, 'AO');
        return a >= 0 ? a : -a;
    }


    /// rescale a uint256 from base 10**decimals1 to 10**decimals2
    function rescale(uint256 a, uint256 decimals1, uint256 decimals2) internal pure returns (uint256) {
        return decimals1 == decimals2 ? a : a * (10 ** decimals2) / (10 ** decimals1);
    }

    /// rescale a int256 from base 10**decimals1 to 10**decimals2
    function rescale(int256 a, uint256 decimals1, uint256 decimals2) internal pure returns (int256) {
        return decimals1 == decimals2 ? a : a * utoi(10 ** decimals2) / utoi(10 ** decimals1);
    }

    /// reformat a uint256 to be a valid 10**decimals base value
    /// the reformatted value is still in 10**18 base
    function reformat(uint256 a, uint256 decimals) internal pure returns (uint256) {
        return decimals == 18 ? a : rescale(rescale(a, 18, decimals), decimals, 18);
    }

    /// reformat a int256 to be a valid 10**decimals base value
    /// the reformatted value is still in 10**18 base
    function reformat(int256 a, uint256 decimals) internal pure returns (int256) {
        return decimals == 18 ? a : rescale(rescale(a, 18, decimals), decimals, 18);
    }

    /// ceiling value away from zero, return a valid 10**decimals base value, but still in 10**18 based
    function ceil(int256 a, uint256 decimals) internal pure returns (int256) {
        if (reformat(a, decimals) == a) {
            return a;
        } else {
            int256 b = rescale(a, 18, decimals);
            b += a > 0 ? int256(1) : int256(-1);
            return rescale(b, decimals, 18);
        }
    }

    function divCeil(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 quotient = a / b;
        uint256 remainder = a - quotient * b;
        if (remainder > 0) {
            return quotient + 1;
        } else {
            return quotient;
        }
    }

    function sqrt(uint256 x) internal pure returns (uint256 y) {
        uint256 z = x / 2 + 1;
        y = x;
        while (z < y) {
            y = z;
            z = (x / z + z) / 2;
        }
    }

    function max(int256 a, int256 b) internal pure returns (int256) {
        return a >= b ? a : b;
    }

    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a >= b ? a : b;
    }

    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a <= b ? a : b;
    }

    function min(int256 a, int256 b) internal pure returns (int256) {
        return a <= b ? a : b;
    }

}

File 10 of 17 : SafeERC20.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0 <0.9.0;

import "../interface/IERC20.sol";
import "./Address.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {

    using Address for address;

    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(IERC20 token, address spender, uint256 value) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        // solhint-disable-next-line max-line-length
        require((value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 newAllowance = token.allowance(address(this), spender) + value;
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 newAllowance = token.allowance(address(this), spender) - value;
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        if (returndata.length > 0) { // Return data is optional
            // solhint-disable-next-line max-line-length
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

File 11 of 17 : Migratable.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0 <0.9.0;

import '../interface/IMigratable.sol';
import './Ownable.sol';

abstract contract Migratable is IMigratable, Ownable {

    // migration timestamp, zero means not set
    // migration timestamp can only be set with a grace period, e.x. 3-365 days, and the
    // migration destination must also be set when setting migration timestamp
    // users can use this grace period to verify the desination contract code
    uint256 _migrationTimestamp;

    // the destination address the source contract will migrate to, after the grace period
    address _migrationDestination;

    function migrationTimestamp() public override view returns (uint256) {
        return _migrationTimestamp;
    }

    function migrationDestination() public override view returns (address) {
        return _migrationDestination;
    }

    // prepare a migration process, the timestamp and desination will be set at this stage
    // and the migration grace period starts
    function prepareMigration(address target, uint256 graceDays) public override _controller_ {
        require(target != address(0), 'Migratable: target 0');
        require(graceDays >= 3 && graceDays <= 365, 'Migratable: graceDays must be 3-365');

        _migrationTimestamp = block.timestamp + graceDays * 1 days;
        _migrationDestination = target;

        emit PrepareMigration(_migrationTimestamp, address(this), _migrationDestination);
    }

}

File 12 of 17 : IMigratable.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0 <0.9.0;

import './IOwnable.sol';

interface IMigratable is IOwnable {

    event PrepareMigration(uint256 migrationTimestamp, address source, address target);

    event ExecuteMigration(uint256 migrationTimestamp, address source, address target);

    function migrationTimestamp() external view returns (uint256);

    function migrationDestination() external view returns (address);

    function prepareMigration(address target, uint256 graceDays) external;

    function approveMigration() external;

    function executeMigration(address source) external;

}

File 13 of 17 : IOwnable.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0 <0.9.0;

interface IOwnable {

    function controller() external view returns (address);

    function setNewController(address newController) external;

    function claimNewController() external;

}

File 14 of 17 : IERC721.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0 <0.9.0;

import "./IERC165.sol";

/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721 is IERC165 {
    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables `operator` to manage the `tokenId` token.
     */
    event Approval(address indexed owner, address indexed operator, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables or disables `operator` to manage all of its assets.
     */
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    /**
     * @dev Returns the number of tokens in `owner`'s account.
     */
    function balanceOf(address owner) external view returns (uint256);

    /**
     * @dev Returns the owner of the `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function ownerOf(uint256 tokenId) external view returns (address);

    /**
     * @dev Returns the 'tokenId' owned by 'owner'
     *
     * Requirements:
     *
     *  - `owner` must exist
     */
    function getTokenId(address owner) external view returns (uint256);

    /**
     * @dev Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) external view returns (address);

    /**
     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
     *
     * See {setApprovalForAll}
     */
    function isApprovedForAll(address owner, address operator) external view returns (bool);

    /**
     * @dev Gives permission to `operator` to transfer `tokenId` token to another account.
     * The approval is cleared when the token is transferred.
     *
     * Only a single account can be approved at a time, so approving the zero address
     * clears previous approvals.
     *
     * Requirements:
     *
     * - The caller must own the token or be an approved operator.
     * - `tokenId` must exist.
     *
     * Emits an {Approval} event.
     */
    function approve(address operator, uint256 tokenId) external;

    /**
     * @dev Approve or remove `operator` as an operator for the caller.
     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
     *
     * Requirements:
     *
     * - The `operator` cannot be the caller.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool approved) external;

    /**
     * @dev Transfers `tokenId` token from `from` to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token
     *   by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 tokenId) external;

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first
     * that contract recipients are aware of the ERC721 protocol to prevent
     * tokens from being forever locked.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be have been allowed to move this token
     *   by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement
     *   {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(address from, address to, uint256 tokenId) external;

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token
     *   by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement
     *   {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external;
}

File 15 of 17 : IERC165.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0 <0.9.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

File 16 of 17 : Address.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0 <0.9.0;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        // solhint-disable-next-line no-inline-assembly
        assembly { size := extcodesize(account) }
        return size > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (bool success, ) = recipient.call{ value: amount }("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain`call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
      return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.call{ value: value }(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.staticcall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

File 17 of 17 : Ownable.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0 <0.9.0;

import '../interface/IOwnable.sol';

abstract contract Ownable is IOwnable {

    address _controller;

    address _newController;

    modifier _controller_() {
        require(msg.sender == _controller, 'Ownable: only controller');
        _;
    }

    function controller() public override view returns (address) {
        return _controller;
    }

    function setNewController(address newController) public override _controller_ {
        _newController = newController;
    }

    // a claim step is needed to prevent set controller to a wrong address and forever lost control
    function claimNewController() public override {
        require(msg.sender == _newController, 'Ownable: not allowed');
        _controller = _newController;
    }

}

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  },
  "libraries": {}
}

Contract Security Audit

Contract ABI

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IPerpetualPoolLite.SignedPrice[]","name":"prices","type":"tuple[]"}],"name":"addLiquidity","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"bAmount","type":"uint256"}],"name":"addLiquidity","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"bAmount","type":"uint256"}],"name":"addMargin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"bAmount","type":"uint256"},{"components":[{"internalType":"uint256","name":"symbolId","type":"uint256"},{"internalType":"uint256","name":"timestamp","type":"uint256"},{"internalType":"uint256","name":"price","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"internalType":"struct IPerpetualPoolLite.SignedPrice[]","name":"prices","type":"tuple[]"}],"name":"addMargin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"symbolId","type":"uint256"},{"internalType":"string","name":"symbol","type":"string"},{"internalType":"address","name":"oracleAddress","type":"address"},{"internalType":"uint256","name":"multiplier","type":"uint256"},{"internalType":"uint256","name":"feeRatio","type":"uint256"},{"internalType":"uint256","name":"fundingRateCoefficient","type":"uint256"}],"name":"addSymbol","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"approveMigration","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"claimNewController","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"collectProtocolFee","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"controller","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"source","type":"address"}],"name":"executeMigration","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"getAddresses","outputs":[{"internalType":"address","name":"bTokenAddress","type":"address"},{"internalType":"address","name":"lTokenAddress","type":"address"},{"internalType":"address","name":"pTokenAddress","type":"address"},{"internalType":"address","name":"liquidatorQualifierAddress","type":"address"},{"internalType":"address","name":"protocolFeeCollector","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getLastUpdateBlock","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getLiquidity","outputs":[{"internalType":"int256","name":"","type":"int256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getParameters","outputs":[{"internalType":"int256","name":"minPoolMarginRatio","type":"int256"},{"internalType":"int256","name":"minInitialMarginRatio","type":"int256"},{"internalType":"int256","name":"minMaintenanceMarginRatio","type":"int256"},{"internalType":"int256","name":"minLiquidationReward","type":"int256"},{"internalType":"int256","name":"maxLiquidationReward","type":"int256"},{"internalType":"int256","name":"liquidationCutRatio","type":"int256"},{"internalType":"int256","name":"protocolFeeCollectRatio","type":"int256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getProtocolFeeAccrued","outputs":[{"internalType":"int256","name":"","type":"int256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"symbolId","type":"uint256"}],"name":"getSymbol","outputs":[{"components":[{"internalType":"uint256","name":"symbolId","type":"uint256"},{"internalType":"string","name":"symbol","type":"string"},{"internalType":"address","name":"oracleAddress","type":"address"},{"internalType":"int256","name":"multiplier","type":"int256"},{"internalType":"int256","name":"feeRatio","type":"int256"},{"internalType":"int256","name":"fundingRateCoefficient","type":"int256"},{"internalType":"int256","name":"price","type":"int256"},{"internalType":"int256","name":"cumulativeFundingRate","type":"int256"},{"internalType":"int256","name":"tradersNetVolume","type":"int256"},{"internalType":"int256","name":"tradersNetCost","type":"int256"}],"internalType":"struct IPerpetualPoolLite.SymbolInfo","name":"","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"liquidate","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"components":[{"internalType":"uint256","name":"symbolId","type":"uint256"},{"internalType":"uint256","name":"timestamp","type":"uint256"},{"internalType":"uint256","name":"price","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"internalType":"struct IPerpetualPoolLite.SignedPrice[]","name":"prices","type":"tuple[]"}],"name":"liquidate","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"migrationDestination","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"migrationTimestamp","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"target","type":"address"},{"internalType":"uint256","name":"graceDays","type":"uint256"}],"name":"prepareMigration","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"lShares","type":"uint256"}],"name":"removeLiquidity","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"lShares","type":"uint256"},{"components":[{"internalType":"uint256","name":"symbolId","type":"uint256"},{"internalType":"uint256","name":"timestamp","type":"uint256"},{"internalType":"uint256","name":"price","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"internalType":"struct IPerpetualPoolLite.SignedPrice[]","name":"prices","type":"tuple[]"}],"name":"removeLiquidity","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"bAmount","type":"uint256"},{"components":[{"internalType":"uint256","name":"symbolId","type":"uint256"},{"internalType":"uint256","name":"timestamp","type":"uint256"},{"internalType":"uint256","name":"price","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"internalType":"struct IPerpetualPoolLite.SignedPrice[]","name":"prices","type":"tuple[]"}],"name":"removeMargin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"bAmount","type":"uint256"}],"name":"removeMargin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"symbolId","type":"uint256"}],"name":"removeSymbol","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newController","type":"address"}],"name":"setNewController","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"symbolId","type":"uint256"},{"internalType":"address","name":"oracleAddress","type":"address"},{"internalType":"uint256","name":"feeRatio","type":"uint256"},{"internalType":"uint256","name":"fundingRateCoefficient","type":"uint256"}],"name":"setSymbolParameters","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"symbolId","type":"uint256"}],"name":"toggleCloseOnly","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"symbolId","type":"uint256"},{"internalType":"int256","name":"tradeVolume","type":"int256"},{"components":[{"internalType":"uint256","name":"symbolId","type":"uint256"},{"internalType":"uint256","name":"timestamp","type":"uint256"},{"internalType":"uint256","name":"price","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"internalType":"struct IPerpetualPoolLite.SignedPrice[]","name":"prices","type":"tuple[]"}],"name":"trade","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"symbolId","type":"uint256"},{"internalType":"int256","name":"tradeVolume","type":"int256"}],"name":"trade","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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0000000000000000000000000000000000000000000000000006f05b59d3b2000000000000000000000000000000000000000000000000000002c68af0bb1400000000000000000000000000003d1d2afd191b165d140e3e8329e634665ffb0e5e0000000000000000000000007b0a54d667f2665438ddf66349c30d75dc4c590a000000000000000000000000074f37be1c9818b192acdb3b268baa52d052ea2800000000000000000000000000000000000000000000000000000000000000000000000000000000000000009099a85d201b8221e19cc6cc6d7447280f2334c3

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

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

-----Decoded View---------------
Arg [0] : parameters (uint256[7]): 1000000000000000000,100000000000000000,50000000000000000,0,5000000000000000000000,500000000000000000,200000000000000000
Arg [1] : addresses (address[5]): 0x3d1d2afd191b165d140e3e8329e634665ffb0e5e,0x7b0a54d667f2665438ddf66349c30d75dc4c590a,0x074f37be1c9818b192acdb3b268baa52d052ea28,0x0000000000000000000000000000000000000000,0x9099a85d201b8221e19cc6cc6d7447280f2334c3

-----Encoded View---------------
12 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000de0b6b3a7640000
Arg [1] : 000000000000000000000000000000000000000000000000016345785d8a0000
Arg [2] : 00000000000000000000000000000000000000000000000000b1a2bc2ec50000
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [4] : 00000000000000000000000000000000000000000000010f0cf064dd59200000
Arg [5] : 00000000000000000000000000000000000000000000000006f05b59d3b20000
Arg [6] : 00000000000000000000000000000000000000000000000002c68af0bb140000
Arg [7] : 0000000000000000000000003d1d2afd191b165d140e3e8329e634665ffb0e5e
Arg [8] : 0000000000000000000000007b0a54d667f2665438ddf66349c30d75dc4c590a
Arg [9] : 000000000000000000000000074f37be1c9818b192acdb3b268baa52d052ea28
Arg [10] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [11] : 0000000000000000000000009099a85d201b8221e19cc6cc6d7447280f2334c3


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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