Contract Address Details

// SPDX-License-Identifier: MIT

pragma solidity 0.7.6;
pragma experimental ABIEncoderV2;

import "../../../dependencies/openzeppelin/contracts/IERC20.sol";
import "../../../dependencies/openzeppelin/contracts/SafeMath.sol";
import "../../../interfaces/IAddressesProvider.sol";
import "../../../interfaces/IVault.sol";
import "../../../interfaces/IVaultConfigurator.sol";
import "../../../interfaces/IPhamePriceOracle.sol";
import "../helpers/Errors.sol";

library VaultUtils {
    using SafeMath for uint256;

    struct Position {
        uint256 size;
        uint256 collateral;
        uint256 averagePrice;
        uint256 entryFundingRate;
        uint256 reserveAmount;
        int256 realisedPnl;
        uint256 lastIncreasedTime;
    }

    uint256 public constant BASIS_POINTS_DIVISOR = 10000;
    uint256 public constant FUNDING_RATE_PRECISION = 1000000;

    function validateLiquidation(
        IAddressesProvider addressesProvider,
        address _account,
        address _collateralToken,
        address _indexToken,
        bool _isLong,
        bool _raise
    ) public view returns (uint256, uint256) {
        IVault vault = IVault(addressesProvider.getVault());

        Position memory position = _getPosition(
            vault,
            _account,
            _collateralToken,
            _indexToken,
            _isLong
        );

        (bool hasProfit, uint256 delta) = vault.getDelta(
            _indexToken,
            position.size,
            position.averagePrice,
            _isLong,
            position.lastIncreasedTime
        );
        uint256 marginFees = getFundingFee(
            vault,
            _account,
            _collateralToken,
            _indexToken,
            _isLong,
            position.size,
            position.entryFundingRate
        ).add(
                getPositionFee(
                    addressesProvider,
                    _account,
                    _collateralToken,
                    _indexToken,
                    _isLong,
                    position.size
                )
            );

        if (!hasProfit && position.collateral < delta) {
            if (_raise) {
                revert("VaultUtils: losses exceed collateral");
            }
            return (1, marginFees);
        }

        uint256 remainingCollateral = position.collateral;
        if (!hasProfit) {
            remainingCollateral = position.collateral.sub(delta);
        }

        if (remainingCollateral < marginFees) {
            if (_raise) {
                revert("VaultUtils: fees exceed collateral");
            }
            // cap the fees to the remainingCollateral
            return (1, remainingCollateral);
        }

        DataTypes.VaultConfig memory vaultConfig = IVault(
            addressesProvider.getVault()
        ).getVaultConfig();
        if (
            remainingCollateral < marginFees.add(vaultConfig.liquidationFeeUsd)
        ) {
            if (_raise) {
                revert("VaultUtils: liquidation fees exceed collateral");
            }
            return (1, marginFees);
        }

        if (
            remainingCollateral.mul(vaultConfig.maxLeverage) <
            position.size.mul(BASIS_POINTS_DIVISOR)
        ) {
            if (_raise) {
                revert("VaultUtils: maxLeverage exceeded");
            }
            return (2, marginFees);
        }

        return (0, marginFees);
    }

    function getNextFundingRate(
        IAddressesProvider addressesProvider,
        address _token
    ) public view returns (uint256) {
        IVault vault = IVault(addressesProvider.getVault());
        DataTypes.TokenConfig memory tokenConfig = vault.getTokenConfig(_token);

        uint256 fundingInterval = tokenConfig.fundingInterval;

        if (
            vault.lastFundingTimes(_token).add(fundingInterval) >
            block.timestamp
        ) {
            return 0;
        }

        uint256 intervals = block
            .timestamp
            .sub(vault.lastFundingTimes(_token))
            .div(fundingInterval);
        uint256 poolAmount = vault.poolAmounts(_token);
        if (poolAmount == 0) {
            return 0;
        }

        return
            tokenConfig
                .fundingRateFactor
                .mul(vault.reservedAmounts(_token))
                .mul(intervals)
                .div(poolAmount);
    }

    function getPositionFee(
        IAddressesProvider addressesProvider,
        address /* _account */,
        address /* _collateralToken */,
        address _indexToken,
        bool _isLong,
        uint256 _sizeDelta
    ) public view returns (uint256) {
        if (_sizeDelta == 0) {
            return 0;
        }

        DataTypes.TokenConfig memory tokenConfig = IVault(
            addressesProvider.getVault()
        ).getTokenConfig(_indexToken);
        uint256 afterFeeUsd = _sizeDelta
            .mul(
                BASIS_POINTS_DIVISOR.sub(
                    _isLong
                        ? tokenConfig.longMarginFeeBps
                        : tokenConfig.shortMarginFeeBps
                )
            )
            .div(BASIS_POINTS_DIVISOR);
        return _sizeDelta.sub(afterFeeUsd);
    }

    function getFundingFee(
        IVault vault,
        address /* _account */,
        address _collateralToken,
        address /* _indexToken */,
        bool /* _isLong */,
        uint256 _size,
        uint256 _entryFundingRate
    ) public view returns (uint256) {
        if (_size == 0) {
            return 0;
        }

        uint256 fundingRate = vault
            .cumulativeFundingRates(_collateralToken)
            .sub(_entryFundingRate);
        if (fundingRate == 0) {
            return 0;
        }

        return _size.mul(fundingRate).div(FUNDING_RATE_PRECISION);
    }

    function getBuyUsdphFeeBps(
        IAddressesProvider addressesProvider,
        address _token,
        uint256 _usdphAmount
    ) public view returns (uint256) {
        DataTypes.VaultConfig memory vaultConfig = IVault(
            addressesProvider.getVault()
        ).getVaultConfig();
        return
            getFeeBps(
                addressesProvider,
                _token,
                _usdphAmount,
                vaultConfig.mintBurnFeeBps,
                vaultConfig.taxBps,
                true
            );
    }

    function getSellUsdphFeeBps(
        IAddressesProvider addressesProvider,
        address _token,
        uint256 _usdphAmount
    ) public view returns (uint256) {
        DataTypes.VaultConfig memory vaultConfig = IVault(
            addressesProvider.getVault()
        ).getVaultConfig();
        return
            getFeeBps(
                addressesProvider,
                _token,
                _usdphAmount,
                vaultConfig.mintBurnFeeBps,
                vaultConfig.taxBps,
                false
            );
    }

    function getSwapFeeBps(
        IAddressesProvider addressesProvider,
        address _tokenIn,
        address _tokenOut,
        uint256 _usdphAmount
    ) public view returns (uint256) {
        IVault vault = IVault(addressesProvider.getVault());
        (uint256 baseBps, uint256 taxBps) = IVaultConfigurator(
            addressesProvider.getVaultConfigurator()
        ).getSwapFeeAndTaxBps(
                vault.getTokenConfig(_tokenIn).isStable &&
                    vault.getTokenConfig(_tokenOut).isStable
            );
        uint256 feesBps0 = getFeeBps(
            addressesProvider,
            _tokenIn,
            _usdphAmount,
            baseBps,
            taxBps,
            true
        );
        uint256 feesBps1 = getFeeBps(
            addressesProvider,
            _tokenOut,
            _usdphAmount,
            baseBps,
            taxBps,
            false
        );
        // use the higher of the two fee basis points
        return feesBps0 > feesBps1 ? feesBps0 : feesBps1;
    }

    // cases to consider
    // 1. initialAmount is far from targetAmount, action increases balance slightly => high rebate
    // 2. initialAmount is far from targetAmount, action increases balance largely => high rebate
    // 3. initialAmount is close to targetAmount, action increases balance slightly => low rebate
    // 4. initialAmount is far from targetAmount, action reduces balance slightly => high tax
    // 5. initialAmount is far from targetAmount, action reduces balance largely => high tax
    // 6. initialAmount is close to targetAmount, action reduces balance largely => low tax
    // 7. initialAmount is above targetAmount, nextAmount is below targetAmount and vice versa
    // 8. a large swap should have similar fees as the same trade split into multiple smaller swaps
    function getFeeBps(
        IAddressesProvider addressesProvider,
        address _token,
        uint256 _usdphDelta,
        uint256 _feeBps,
        uint256 _taxBps,
        bool _increment
    ) public view returns (uint256) {
        if (
            !IVault(addressesProvider.getVault())
                .getVaultConfig()
                .hasDynamicFees
        ) {
            return _feeBps;
        }

        uint256 initialAmount = IVault(addressesProvider.getVault())
            .usdphAmounts(_token);
        uint256 nextAmount = initialAmount.add(_usdphDelta);
        if (!_increment) {
            nextAmount = _usdphDelta > initialAmount
                ? 0
                : initialAmount.sub(_usdphDelta);
        }

        uint256 targetAmount = _getTargetUsdphAmount(addressesProvider, _token);
        if (targetAmount == 0) {
            return _feeBps;
        }

        uint256 initialDiff = initialAmount > targetAmount
            ? initialAmount.sub(targetAmount)
            : targetAmount.sub(initialAmount);
        uint256 nextDiff = nextAmount > targetAmount
            ? nextAmount.sub(targetAmount)
            : targetAmount.sub(nextAmount);

        // action improves relative asset balance
        if (nextDiff < initialDiff) {
            uint256 rebateBps = _taxBps.mul(initialDiff).div(targetAmount);
            return rebateBps > _feeBps ? 0 : _feeBps.sub(rebateBps);
        }

        uint256 averageDiff = initialDiff.add(nextDiff).div(2);
        if (averageDiff > targetAmount) {
            averageDiff = targetAmount;
        }
        uint256 taxBps = _taxBps.mul(averageDiff).div(targetAmount);
        return _feeBps.add(taxBps);
    }

    function _getMinProfitTime(
        DataTypes.TokenConfig memory tokenConfig,
        uint256 _size,
        bool _isLong
    ) private pure returns (uint256) {
        if (_size == 0 || tokenConfig.minProfitTime == 0) {
            return 0;
        }
        uint256 baseSize = _isLong
            ? tokenConfig.maxPositionLongSize
            : tokenConfig.maxPositionShortSize;
        if (baseSize == 0) {
            return tokenConfig.minProfitTime;
        }
        if (
            (tokenConfig.hasMinProfitTimeFloor && _size < baseSize) ||
            (_size == baseSize)
        ) {
            return tokenConfig.minProfitTime;
        }

        if (_size < baseSize) {
            return tokenConfig.minProfitTime.mul(_size).div(baseSize);
        } else {
            return
                tokenConfig
                    .minProfitTime
                    .mul(
                        baseSize.mul(10000).add(
                            _size.sub(baseSize).mul(
                                tokenConfig.minProfitTimeCoefBps
                            )
                        )
                    )
                    .div(baseSize)
                    .div(10000);
        }
    }

    function getMinProfitTime(
        IAddressesProvider addressesProvider,
        address _indexToken,
        uint256 _size,
        bool _isLong
    ) public view returns (uint256) {
        DataTypes.TokenConfig memory tokenConfig = IVault(
            addressesProvider.getVault()
        ).getTokenConfig(_indexToken);
        return _getMinProfitTime(tokenConfig, _size, _isLong);
    }

    function getDelta(
        IAddressesProvider addressesProvider,
        address _indexToken,
        uint256 _size,
        uint256 _averagePrice,
        bool _isLong,
        uint256 _lastIncreasedTime
    ) public view returns (bool, uint256) {
        require(_averagePrice > 0, Errors.VU_INVALID_AVERAGE_PRICE);
        uint256 price = IPhamePriceOracle(addressesProvider.getPriceOracle())
            .getPrice(_indexToken, !_isLong);
        uint256 priceDelta = _averagePrice > price
            ? _averagePrice.sub(price)
            : price.sub(_averagePrice);
        uint256 delta = _size.mul(priceDelta).div(_averagePrice);

        bool hasProfit;

        if (_isLong) {
            hasProfit = price > _averagePrice;
        } else {
            hasProfit = _averagePrice > price;
        }

        // if the minProfitTime has passed then there will be no min profit threshold
        // the min profit threshold helps to prevent front-running issues
        DataTypes.TokenConfig memory tokenConfig = IVault(
            addressesProvider.getVault()
        ).getTokenConfig(_indexToken);
        uint256 minBps = block.timestamp >
            _lastIncreasedTime.add(
                _getMinProfitTime(tokenConfig, _size, _isLong)
            )
            ? 0
            : tokenConfig.minProfitBps;
        if (hasProfit && delta.mul(BASIS_POINTS_DIVISOR) <= _size.mul(minBps)) {
            delta = 0;
        }

        return (hasProfit, delta);
    }

    function _getPosition(
        IVault vault,
        address _account,
        address _collateralToken,
        address _indexToken,
        bool _isLong
    ) private view returns (Position memory) {
        Position memory position;
        {
            (
                uint256 size,
                uint256 collateral,
                uint256 averagePrice,
                uint256 entryFundingRate /* reserveAmount */ /* realisedPnl */ /* hasProfit */,
                ,
                ,
                ,
                uint256 lastIncreasedTime
            ) = vault.getPosition(
                    _account,
                    _collateralToken,
                    _indexToken,
                    _isLong
                );
            position.size = size;
            position.collateral = collateral;
            position.averagePrice = averagePrice;
            position.entryFundingRate = entryFundingRate;
            position.lastIncreasedTime = lastIncreasedTime;
        }
        return position;
    }

    function _getTargetUsdphAmount(
        IAddressesProvider addressesProvider,
        address _token
    ) private view returns (uint256) {
        uint256 supply = IERC20(addressesProvider.getUsdph()).totalSupply();
        if (supply == 0) {
            return 0;
        }
        IVault vault = IVault(addressesProvider.getVault());
        uint256 weight = vault.getTokenConfig(_token).weight;
        return weight.mul(supply).div(vault.totalTokenWeights());
    }
}
        

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, uint256 amount)
        external
        returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender)
        external
        view
        returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `sender` to `recipient` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) external returns (bool);

    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(
        address indexed owner,
        address indexed spender,
        uint256 value
    );
}
          

// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;

library Errors {
    string public constant VC_INVALID_STAKING_BPS = "1"; // VaultConfigurator: invalid stakingBps
    string public constant VC_INVALID_MAX_LEVERAGE = "2"; // VaultConfigurator: invalid maxLeverage
    string public constant VC_INVALID_TAX_BPS = "3"; // VaultConfigurator: invalid taxBps
    string public constant VC_INVALID_STABLE_TAX_BPS = "4"; // VaultConfigurator: invalid stableTaxBps
    string public constant VC_INVALID_MINT_BURN_FEE_BPS = "5"; // VaultConfigurator: invalid mintBurnFeeBps
    string public constant VC_INVALID_SWAP_FEE_BPS = "6"; // VaultConfigurator: invalid swapFeeBps
    string public constant VC_INVALID_STABLE_SWAP_FEE_BPS = "7"; // VaultConfigurator: invalid stableSwapFeeBps
    string public constant VC_INVALID_MARGIN_FEE_BPS = "8"; // VaultConfigurator: invalid marginFeeBps
    string public constant VC_INVALID_LIQUIDATION_FEE_USD = "9"; // VaultConfigurator: invalid _liquidationFeeUsd
    string public constant VC_INVALID_FUNDING_INTERVAL = "10"; // VaultConfigurator: invalid fundingInterval
    string public constant VC_INVALID_FUNDING_RATE_FACTOR = "11"; // VaultConfigurator: invalid fundingRateFactor
    string public constant VC_TOKEN_NOT_WHITELISTED = "13"; // VaultConfigurator: token not whitelisted
    string public constant VC_INVALID_MIN_PROFIT_TIME_COEF_BPS = "16"; // VaultConfigurator: invalid minProfitTimeCoefBps

    string public constant VU_INVALID_AVERAGE_PRICE = "38"; // VaultUtil: invalid averagePrice
    string public constant VU_INVALID_MSG_SENDER = "41"; // VaultUtil: invalid msg.sender

    string public constant TCL_MISMATCHED_TOKENS = "42"; // TokenConfigsLogic: mismatched tokens
    string public constant TCL_COLLATERAL_TOKEN_NOT_WHITELISTED = "43"; // TokenConfigsLogic: collateralToken not whitelisted
    string public constant TCL_COLLATERAL_TOKEN_MUST_NOT_BE_STABLE = "44"; // TokenConfigsLogic: collateralToken must not be a stableToken
    string public constant TCL_COLLATERAL_TOKEN_MUST_BE_STABLE = "46"; // TokenConfigsLogic: collateralToken must be a stableToken
    string public constant TCL_INDEX_TOKEN_MUST_NOT_BE_STABLE = "47"; // TokenConfigsLogic: indexToken must not be a stableToken
    string public constant TCL_INDEX_TOKEN_NOT_SHORTABLE = "48"; // TokenConfigsLogic: indexToken not shortable
    string public constant TCL_TOKEN_NOT_WHITELISTED = "200"; // TokenConfigsLogic: token not whitelisted
    string public constant TCL_INVALID_TOKEN_WEIGHT = "201"; // TokenConfigsLogic: invalid token weight
}
          

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b)
        internal
        pure
        returns (bool, uint256)
    {
        uint256 c = a + b;
        if (c < a) return (false, 0);
        return (true, c);
    }

    /**
     * @dev Returns the substraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b)
        internal
        pure
        returns (bool, uint256)
    {
        if (b > a) return (false, 0);
        return (true, a - b);
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b)
        internal
        pure
        returns (bool, uint256)
    {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) return (true, 0);
        uint256 c = a * b;
        if (c / a != b) return (false, 0);
        return (true, c);
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b)
        internal
        pure
        returns (bool, uint256)
    {
        if (b == 0) return (false, 0);
        return (true, a / b);
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b)
        internal
        pure
        returns (bool, uint256)
    {
        if (b == 0) return (false, 0);
        return (true, a % b);
    }

    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");
        return c;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b <= a, "SafeMath: subtraction overflow");
        return a - b;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) return 0;
        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");
        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b > 0, "SafeMath: division by zero");
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b > 0, "SafeMath: modulo by zero");
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        return a - b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryDiv}.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        return a % b;
    }
}
          

// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;

interface IAddressesProvider {
    function getUsdph() external view returns (address);

    function getPhlp() external view returns (address);

    function getPhlpManager() external view returns (address);

    function getVault() external view returns (address);

    function getVaultConfigurator() external view returns (address);

    function getRouter() external view returns (address);

    function getOrderBook() external view returns (address);

    function getPositionManager() external view returns (address);

    function getPositionRouter() external view returns (address);

    function getPriceOracle() external view returns (address);

    function getShortsTracker() external view returns (address);

    function getTreasury() external view returns (address payable);

    function getFeeDistribution() external view returns (address);
}
          

// SPDX-License-Identifier: MIT

pragma solidity 0.7.6;

interface IPhamePriceOracle {
    function backupPriceOracle() external view returns (address);

    function adjustmentBps(address _token) external view returns (uint256);

    function isAdjustmentAdditive(address _token) external view returns (bool);

    function setAdjustment(
        address _token,
        bool _isAdditive,
        uint256 _adjustmentBps
    ) external;

    function setSpreadBps(address _token, uint256 _spreadBps) external;

    function setSpreadThresholdBps(uint256 _spreadThresholdBps) external;

    function setPriceSampleSpace(uint256 _priceSampleSpace) external;

    function setMaxStrictPriceDeviation(
        uint256 _maxStrictPriceDeviation
    ) external;

    function getPrice(
        address _token,
        bool _maximise
    ) external view returns (uint256);

    function setTokenConfig(
        address _token,
        address _priceFeed,
        uint256 _priceDecimals,
        bool _isStrictStable
    ) external;
}
          

// SPDX-License-Identifier: MIT

pragma solidity 0.7.6;
pragma experimental ABIEncoderV2;

import "../protocol/libraries/types/DataTypes.sol";
import "./IAddressesProvider.sol";

interface IVault {
    struct Position {
        uint256 size;
        uint256 collateral;
        uint256 averagePrice;
        uint256 entryFundingRate;
        uint256 reserveAmount;
        int256 realisedPnl;
        uint256 lastIncreasedTime;
    }

    event BuyUSDPH(
        address account,
        address token,
        uint256 tokenAmount,
        uint256 usdphAmount,
        uint256 feeBps
    );
    event SellUSDPH(
        address account,
        address token,
        uint256 usdphAmount,
        uint256 tokenAmount,
        uint256 feeBps
    );
    event Swap(
        address account,
        address tokenIn,
        address tokenOut,
        uint256 amountIn,
        uint256 amountOut,
        uint256 amountOutAfterFees,
        uint256 feeBps
    );
    event IncreasePosition(
        bytes32 key,
        address account,
        address collateralToken,
        address indexToken,
        uint256 collateralDelta,
        uint256 sizeDelta,
        bool isLong,
        uint256 price,
        uint256 fee
    );
    event DecreasePosition(
        bytes32 key,
        address account,
        address collateralToken,
        address indexToken,
        uint256 collateralDelta,
        uint256 sizeDelta,
        bool isLong,
        uint256 price,
        uint256 fee
    );
    event LiquidatePosition(
        bytes32 key,
        address account,
        address collateralToken,
        address indexToken,
        bool isLong,
        uint256 size,
        uint256 collateral,
        uint256 reserveAmount,
        int256 realisedPnl,
        uint256 markPrice
    );
    event UpdatePosition(
        bytes32 key,
        uint256 size,
        uint256 collateral,
        uint256 averagePrice,
        uint256 entryFundingRate,
        uint256 reserveAmount,
        int256 realisedPnl,
        uint256 markPrice
    );
    event ClosePosition(
        bytes32 key,
        uint256 size,
        uint256 collateral,
        uint256 averagePrice,
        uint256 entryFundingRate,
        uint256 reserveAmount,
        int256 realisedPnl
    );

    event UpdateFundingRate(address token, uint256 fundingRate);
    event UpdatePnl(bytes32 key, bool hasProfit, uint256 delta);

    event CollectSwapFees(address token, uint256 feeUsd, uint256 feeTokens);
    event CollectMarginFees(address token, uint256 feeUsd, uint256 feeTokens);
    event PayLpFees(address token, uint256 feeTokens);

    event DirectPoolDeposit(address token, uint256 amount);
    event IncreasePoolAmount(address token, uint256 amount);
    event DecreasePoolAmount(address token, uint256 amount);
    event IncreaseUsdphAmount(address token, uint256 amount);
    event DecreaseUsdphAmount(address token, uint256 amount);
    event IncreaseReservedAmount(address token, uint256 amount);
    event DecreaseReservedAmount(address token, uint256 amount);
    event IncreaseGuaranteedUsd(address token, uint256 amount);
    event DecreaseGuaranteedUsd(address token, uint256 amount);

    function addressesProvider() external view returns (IAddressesProvider);

    function getVaultConfig()
        external
        view
        returns (DataTypes.VaultConfig memory);

    function setVaultConfig(
        DataTypes.VaultConfig calldata vaultConfig
    ) external;

    function allWhitelistedTokensLength() external view returns (uint256);

    function totalTokenWeights() external view returns (uint256);

    function allWhitelistedTokens(uint256) external view returns (address);

    function getTokenConfig(
        address _token
    ) external view returns (DataTypes.TokenConfig memory);

    function setTokenConfig(
        address _token,
        DataTypes.TokenConfig calldata tokenConfig
    ) external;

    function clearTokenConfig(address _token) external;

    function getAccountTokenConfig(
        address _account,
        address _token
    ) external view returns (DataTypes.AccountTokenConfig memory);

    function setAccountTokenConfig(
        address _account,
        address _token,
        DataTypes.AccountTokenConfig calldata accountTokenConfig
    ) external;

    function getAccountTokenPositionSizeLimit(
        address _account,
        address _token,
        bool _isLong
    ) external view returns (uint256);

    function setUsdphAmount(address _token, uint256 _amount) external;

    function tokenBalances(address _token) external view returns (uint256);

    function lastFundingTimes(address _token) external view returns (uint256);

    function withdrawFees(
        address _token,
        address _receiver
    ) external returns (uint256);

    function directPoolDeposit(address _token) external;

    function buyUSDPH(
        address _token,
        address _receiver
    ) external returns (uint256);

    function buyUSDPHwithoutFee(address _token) external returns (uint256);

    function sellUSDPH(
        address _token,
        address _receiver
    ) external returns (uint256);

    function swap(
        address _tokenIn,
        address _tokenOut,
        address _receiver
    ) external returns (uint256);

    function increasePosition(
        address _account,
        address _collateralToken,
        address _indexToken,
        uint256 _sizeDelta,
        bool _isLong
    ) external;

    function decreasePosition(
        address _account,
        address _collateralToken,
        address _indexToken,
        uint256 _collateralDelta,
        uint256 _sizeDelta,
        bool _isLong,
        address _receiver
    ) external returns (uint256);

    function validateLiquidation(
        address _account,
        address _collateralToken,
        address _indexToken,
        bool _isLong,
        bool _raise
    ) external view returns (uint256, uint256);

    function liquidatePosition(
        address _account,
        address _collateralToken,
        address _indexToken,
        bool _isLong,
        address _feeReceiver
    ) external;

    function tokenToUsdMin(
        address _token,
        uint256 _tokenAmount
    ) external view returns (uint256);

    function cumulativeFundingRates(
        address _token
    ) external view returns (uint256);

    function getNextFundingRate(address _token) external view returns (uint256);

    function getFeeBps(
        address _token,
        uint256 _usdphDelta,
        uint256 _feeBps,
        uint256 _taxBps,
        bool _increment
    ) external view returns (uint256);

    function feeReserves(address _token) external view returns (uint256);

    function globalShortSizes(address _token) external view returns (uint256);

    function guaranteedUsd(address _token) external view returns (uint256);

    function poolAmounts(address _token) external view returns (uint256);

    function reservedAmounts(address _token) external view returns (uint256);

    function usdphAmounts(address _token) external view returns (uint256);

    function getRedemptionAmount(
        address _token,
        uint256 _usdphAmount
    ) external view returns (uint256);

    function getMinProfitTime(
        address _indexToken,
        uint256 _size,
        bool _isLong
    ) external view returns (uint256);

    function getDelta(
        address _indexToken,
        uint256 _size,
        uint256 _averagePrice,
        bool _isLong,
        uint256 _lastIncreasedTime
    ) external view returns (bool, uint256);

    function getPosition(
        address _account,
        address _collateralToken,
        address _indexToken,
        bool _isLong
    )
        external
        view
        returns (
            uint256,
            uint256,
            uint256,
            uint256,
            uint256,
            uint256,
            bool,
            uint256
        );
}
          

// SPDX-License-Identifier: MIT

pragma solidity 0.7.6;
pragma experimental ABIEncoderV2;

interface IVaultConfigurator {
    function setIsLeverageEnabled(bool _isLeverageEnabled) external;

    function setStakingBps(uint256 _stakingBps) external;

    function setUsdphAmount(address _token, uint256 _amount) external;

    function setTokenConfig(
        address _token,
        uint256 _tokenDecimals,
        uint256 _tokenWeight,
        uint256 _maxUsdphAmount,
        bool _isStable,
        bool _isShortable
    ) external;

    function setTokenMinProfit(
        address _token,
        uint256 _minProfitBps,
        uint256 _minProfitTime,
        bool _hasMinProfitTimeFloor,
        uint256 _minProfitTimeCoefBps
    ) external;

    function setTokenMaxSizes(
        address _token,
        uint256 maxGlobalLongSize,
        uint256 maxGlobalShortSize,
        uint256 maxPositionLongSize,
        uint256 maxPositionShortSize
    ) external;

    function setAccountTokenConfig(
        address _account,
        address _token,
        bool _isLongBlacklisted,
        bool _isShortBlacklisted,
        uint256 _maxPositionLongSizeOverride,
        uint256 _maxPositionShortSizeOverride
    ) external;

    function getSwapFeeAndTaxBps(
        bool isStableSwap
    ) external view returns (uint256, uint256);
}
          

// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;

library DataTypes {
    struct VaultConfig {
        bool isSwapEnabled;
        bool isLeverageEnabled;
        uint256 maxLeverage;
        // fees
        uint256 taxBps;
        uint256 stableTaxBps;
        uint256 mintBurnFeeBps;
        uint256 swapFeeBps;
        uint256 stableSwapFeeBps;
        uint256 liquidationFeeUsd;
        bool hasDynamicFees;
        // staking
        uint256 stakingBps;
    }

    struct TokenConfig {
        // should always be true if token exists
        bool isWhitelisted;
        // basic parameters
        uint256 decimals;
        uint256 weight; // customisation of index composition
        uint256 minProfitBps;
        uint256 minProfitTime;
        bool hasMinProfitTimeFloor;
        uint256 minProfitTimeCoefBps; // coefficient for minProfitTime
        uint256 maxUsdphAmount; // a max amount of USDPH debt for a token
        bool isStable;
        bool isShortable;
        // risk parameters
        // bufferAmount allows specification of an amount to exclude from swaps
        // this can be used to ensure a certain amount of liquidity is available for leverage positions
        uint256 bufferAmount;
        uint256 maxGlobalLongSize;
        uint256 maxGlobalShortSize;
        uint256 maxPositionLongSize;
        uint256 maxPositionShortSize;
        // fees
        uint256 longMarginFeeBps;
        uint256 shortMarginFeeBps;
        // funding rate
        uint256 fundingInterval;
        uint256 fundingRateFactor;
    }

    struct TokenConfigs {
        uint256 totalTokenWeights;
        address[] allWhitelistedTokens;
        mapping(address => TokenConfig) tokenConfigs;
    }

    struct AccountTokenConfig {
        bool isLongBlacklisted;
        bool isShortBlacklisted;
        uint256 maxPositionLongSizeOverride;
        uint256 maxPositionShortSizeOverride;
    }
}