Contract Address Details

// SPDX-License-Identifier: MIT

pragma solidity 0.7.6;
pragma experimental ABIEncoderV2;

import "../../dependencies/openzeppelin/contracts/Ownable.sol";
import "../../dependencies/openzeppelin/contracts/Address.sol";
import "../../dependencies/openzeppelin/contracts/SafeMath.sol";
import "../../dependencies/openzeppelin/contracts/IERC20.sol";
import "../../dependencies/openzeppelin/contracts/SafeERC20.sol";
import "../../dependencies/openzeppelin/contracts/ReentrancyGuard.sol";
import "../../interfaces/IAddressesProvider.sol";
import "../../interfaces/IPhlpManager.sol";
import "../../interfaces/IUSDPH.sol";
import "../../interfaces/IPHLP.sol";
import "../../interfaces/IVault.sol";
import "../../interfaces/IVaultConfigurator.sol";
import "../../interfaces/IBasePositionManager.sol";
import "../../interfaces/IPhamePriceOracle.sol";
import "../../interfaces/IWETH.sol";
import "../../interfaces/IShortsTracker.sol";
import "../libraries/types/DataTypes.sol";

contract PhlpManager is IPhlpManager, ReentrancyGuard, Ownable {
    using SafeMath for uint256;
    using SafeERC20 for IERC20;
    using Address for address payable;

    uint256 public constant PRICE_PRECISION = 10 ** 30;
    uint256 public constant USDPH_DECIMALS = 18;
    uint256 public constant MAX_COOLDOWN_DURATION = 48 hours;

    IAddressesProvider public immutable addressesProvider;
    address public immutable weth;

    uint256 public override cooldownDuration;
    mapping(address => uint256) public override lastAddedAt;

    constructor(
        IAddressesProvider addressesProvider_,
        address _weth,
        uint256 _cooldownDuration
    ) Ownable() {
        require(
            address(addressesProvider_) != address(0),
            "PhlpManager: addressesProvider is zero address"
        );
        require(_weth != address(0), "PhlpManager: weth is zero address");
        addressesProvider = addressesProvider_;
        weth = _weth;
        cooldownDuration = _cooldownDuration;
    }

    function setCooldownDuration(uint256 _cooldownDuration) external onlyOwner {
        require(
            _cooldownDuration <= MAX_COOLDOWN_DURATION,
            "PhlpManager: invalid _cooldownDuration"
        );
        cooldownDuration = _cooldownDuration;
    }

    function addLiquidity(
        address _token,
        uint256 _amount,
        uint256 _minUsdph,
        uint256 _minPhlp
    ) external override nonReentrant returns (uint256) {
        require(_token != address(0), "PhlpManager: invalid _token");
        return _addLiquidity(msg.sender, _token, _amount, _minUsdph, _minPhlp);
    }

    function addLiquidityETH(
        uint256 _minUsdph,
        uint256 _minPhlp
    ) external payable override nonReentrant returns (uint256) {
        require(msg.value > 0, "PhlpManager: invalid msg.value");
        IWETH(weth).deposit{value: msg.value}();
        return
            _addLiquidity(
                msg.sender,
                address(0),
                msg.value,
                _minUsdph,
                _minPhlp
            );
    }

    function removeLiquidity(
        address _tokenOut,
        uint256 _phlpAmount,
        uint256 _minOut,
        address _receiver
    ) external override nonReentrant returns (uint256) {
        return
            _removeLiquidity(
                msg.sender,
                _tokenOut,
                _phlpAmount,
                _minOut,
                _receiver
            );
    }

    function removeLiquidityETH(
        uint256 _phlpAmount,
        uint256 _minOut,
        address payable _receiver
    ) external override nonReentrant returns (uint256) {
        uint256 amountOut = _removeLiquidity(
            msg.sender,
            weth,
            _phlpAmount,
            _minOut,
            address(this)
        );
        IWETH(weth).withdraw(amountOut);
        _receiver.sendValue(amountOut);
        return amountOut;
    }

    function getPrice(bool _maximise) external view override returns (uint256) {
        uint256 supply = IERC20(addressesProvider.getPhlp()).totalSupply();
        if (supply == 0) {
            return PRICE_PRECISION;
        }
        uint256 aum = getAum(_maximise);
        return aum.mul(10 ** 18).div(supply);
    }

    function getAums() public view override returns (uint256[] memory) {
        uint256[] memory amounts = new uint256[](2);
        amounts[0] = getAum(true);
        amounts[1] = getAum(false);
        return amounts;
    }

    function getAumInUsdph(bool maximise) public view returns (uint256) {
        uint256 aum = getAum(maximise);
        return aum.mul(10 ** USDPH_DECIMALS).div(PRICE_PRECISION);
    }

    function getAum(bool maximise) public view returns (uint256) {
        IVault vault = IVault(addressesProvider.getVault());
        IPhamePriceOracle oracle = IPhamePriceOracle(
            addressesProvider.getPriceOracle()
        );

        uint256 length = vault.allWhitelistedTokensLength();
        uint256 aum = 0;
        uint256 shortProfits = 0;

        for (uint256 i = 0; i < length; i++) {
            address token = vault.allWhitelistedTokens(i);
            DataTypes.TokenConfig memory tokenConfig = vault.getTokenConfig(
                token
            );

            uint256 price = oracle.getPrice(token, maximise);
            uint256 poolAmount = vault.poolAmounts(token);
            uint256 decimals = tokenConfig.decimals;

            if (tokenConfig.isStable) {
                aum = aum.add(poolAmount.mul(price).div(10 ** decimals));
            } else {
                // add global short profit / loss
                uint256 size = vault.globalShortSizes(token);
                if (size > 0) {
                    (uint256 delta, bool hasProfit) = getGlobalShortDelta(
                        token,
                        price,
                        size
                    );
                    if (!hasProfit) {
                        // add losses from shorts
                        aum = aum.add(delta);
                    } else {
                        shortProfits = shortProfits.add(delta);
                    }
                }

                aum = aum.add(vault.guaranteedUsd(token));

                uint256 reservedAmount = vault.reservedAmounts(token);
                aum = aum.add(
                    poolAmount.sub(reservedAmount).mul(price).div(
                        10 ** decimals
                    )
                );
            }
        }

        return aum = shortProfits > aum ? 0 : aum.sub(shortProfits);
    }

    function getGlobalShortDelta(
        address _token,
        uint256 _price,
        uint256 _size
    ) public view returns (uint256, bool) {
        uint256 averagePrice = IShortsTracker(
            addressesProvider.getShortsTracker()
        ).globalShortAveragePrices(_token);
        uint256 priceDelta = averagePrice > _price
            ? averagePrice.sub(_price)
            : _price.sub(averagePrice);
        uint256 delta = _size.mul(priceDelta).div(averagePrice);
        return (delta, averagePrice > _price);
    }

    function _addLiquidity(
        address _account,
        address _token,
        uint256 _amount,
        uint256 _minUsdph,
        uint256 _minPhlp
    ) private returns (uint256) {
        require(_amount > 0, "PhlpManager: invalid _amount");

        IVault vault = IVault(addressesProvider.getVault());
        address phlp = addressesProvider.getPhlp();

        // calculate aum before buyUSDPH
        uint256 aumInUsdph = getAumInUsdph(true);
        uint256 phlpSupply = IERC20(phlp).totalSupply();

        if (_token == address(0)) {
            IERC20(weth).transfer(address(vault), _amount);
            _token = weth;
        } else if (_account == address(this)) {
            IERC20(_token).safeTransfer(address(vault), _amount);
        } else {
            IERC20(_token).safeTransferFrom(_account, address(vault), _amount);
        }
        uint256 usdphAmount = _account == address(this)
            ? vault.buyUSDPHwithoutFee(_token)
            : vault.buyUSDPH(_token, address(this));
        require(
            usdphAmount >= _minUsdph,
            "PhlpManager: insufficient USDPH output"
        );

        uint256 mintAmount = aumInUsdph == 0
            ? usdphAmount
            : usdphAmount.mul(phlpSupply).div(aumInUsdph);
        require(
            mintAmount >= _minPhlp,
            "PhlpManager: insufficient PHLP output"
        );

        IPHLP(phlp).mint(_account, mintAmount);

        lastAddedAt[_account] = block.timestamp;

        emit AddLiquidity(
            _account,
            _token,
            _amount,
            aumInUsdph,
            phlpSupply,
            usdphAmount,
            mintAmount
        );

        return mintAmount;
    }

    function _removeLiquidity(
        address _account,
        address _tokenOut,
        uint256 _phlpAmount,
        uint256 _minOut,
        address _receiver
    ) private returns (uint256) {
        require(_phlpAmount > 0, "PhlpManager: invalid _phlpAmount");

        IVaultConfigurator vaultConfigurator = IVaultConfigurator(
            addressesProvider.getVaultConfigurator()
        );
        address phlp = addressesProvider.getPhlp();
        address usdph = addressesProvider.getUsdph();

        // calculate aum before sellUSDPH
        uint256 aumInUsdph = getAumInUsdph(false);
        uint256 phlpSupply = IERC20(phlp).totalSupply();

        uint256 usdphAmount = _phlpAmount.mul(aumInUsdph).div(phlpSupply);
        uint256 usdphBalance = IERC20(usdph).balanceOf(address(this));
        if (usdphAmount > usdphBalance) {
            IUSDPH(usdph).mint(address(this), usdphAmount.sub(usdphBalance));
        }

        IPHLP(phlp).burn(_account, _phlpAmount);

        IERC20(usdph).transfer(addressesProvider.getVault(), usdphAmount);
        uint256 stakingBps = IVault(addressesProvider.getVault())
            .getVaultConfig()
            .stakingBps;
        if (phlpSupply == _phlpAmount) {
            // when clearing out the vault
            // all fees should go to stakers (fee reserves) rather than the vault
            vaultConfigurator.setStakingBps(10000);
        }
        uint256 amountOut = IVault(addressesProvider.getVault()).sellUSDPH(
            _tokenOut,
            _receiver
        );
        if (phlpSupply == _phlpAmount) {
            vaultConfigurator.setStakingBps(stakingBps);
        }
        require(amountOut >= _minOut, "PhlpManager: insufficient output");

        emit RemoveLiquidity(
            _account,
            _tokenOut,
            _phlpAmount,
            aumInUsdph,
            phlpSupply,
            usdphAmount,
            amountOut
        );

        return amountOut;
    }

    receive() external payable {
        require(msg.sender == weth, "PhlpManager: invalid sender");
    }

    function convertFeesToLiquidity() external override nonReentrant {
        IVault vault = IVault(addressesProvider.getVault());
        IBasePositionManager positionManager = IBasePositionManager(
            addressesProvider.getPositionManager()
        );
        IBasePositionManager positionRouter = IBasePositionManager(
            addressesProvider.getPositionRouter()
        );

        // transfer fees to this contract and convert them to liquidity
        for (uint256 i = 0; i < vault.allWhitelistedTokensLength(); i++) {
            address tokenAddress = vault.allWhitelistedTokens(i);
            // collect fees
            vault.withdrawFees(tokenAddress, address(this));
            positionManager.withdrawFees(tokenAddress, address(this));
            positionRouter.withdrawFees(tokenAddress, address(this));
            // convert to liquidity
            IERC20 token = IERC20(tokenAddress);
            uint256 amount = token.balanceOf(address(this));
            if (amount > 0) {
                _addLiquidity(address(this), tokenAddress, amount, 0, 0);
            }
        }

        // transfer PHLP to treasury
        uint256 phlpBalance = IERC20(addressesProvider.getPhlp()).balanceOf(
            address(this)
        );
        if (phlpBalance > 0) {
            lastAddedAt[address(this)] = 0; // remove transfer constraints
            IERC20(addressesProvider.getPhlp()).transfer(
                addressesProvider.getFeeDistribution(),
                phlpBalance
            );
        }
    }
}
        

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.2 <0.8.0;

/**
 * @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);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data)
        internal
        returns (bytes memory)
    {
        return
            functionDelegateCall(
                target,
                data,
                "Address: low-level delegate call failed"
            );
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.delegatecall(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);
            }
        }
    }
}
          

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/*
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with GSN meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address payable) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}
          

// 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: MIT

pragma solidity >=0.6.0 <0.8.0;

import "./Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(
        address indexed previousOwner,
        address indexed newOwner
    );

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(
            newOwner != address(0),
            "Ownable: new owner is the zero address"
        );
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}
          

// SPDX-License-Identifier: MIT

pragma solidity 0.7.6;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and make it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        // On the first call to nonReentrant, _notEntered will be true
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;

        _;

        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }
}
          

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

import "./IERC20.sol";
import "./SafeMath.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 SafeMath for uint256;
    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).add(
            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).sub(
            value,
            "SafeERC20: decreased allowance below zero"
        );
        _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"
            );
        }
    }
}
          

// 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 IBasePositionManager {
    event SetDepositFee(uint256 depositFee);
    event SetEthTransferGasLimit(uint256 ethTransferGasLimit);
    event SetMinTimeDelayPublic(uint256 minTimeDelayPublic);
    event SetIncreasePositionBufferBps(uint256 increasePositionBufferBps);
    event WithdrawFees(address token, address receiver, uint256 amount);

    function withdrawFees(address _token, address _receiver) external;
}
          

// SPDX-License-Identifier: MIT

pragma solidity 0.7.6;

interface IPHLP {
    function mint(address _account, uint256 _amount) external;

    function burn(address _account, uint256 _amount) external;
}
          

// 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;

interface IPhlpManager {
    event AddLiquidity(
        address account,
        address token,
        uint256 amount,
        uint256 aumInUsdph,
        uint256 phlpSupply,
        uint256 usdphAmount,
        uint256 mintAmount
    );

    event RemoveLiquidity(
        address account,
        address token,
        uint256 phlpAmount,
        uint256 aumInUsdph,
        uint256 phlpSupply,
        uint256 usdphAmount,
        uint256 amountOut
    );

    function cooldownDuration() external view returns (uint256);

    function lastAddedAt(address _account) external view returns (uint256);

    function addLiquidity(
        address _token,
        uint256 _amount,
        uint256 _minUsdph,
        uint256 _minPhlp
    ) external returns (uint256);

    function addLiquidityETH(
        uint256 _minUsdph,
        uint256 _minPhlp
    ) external payable returns (uint256);

    function removeLiquidity(
        address _tokenOut,
        uint256 _phlpAmount,
        uint256 _minOut,
        address _receiver
    ) external returns (uint256);

    function removeLiquidityETH(
        uint256 _phlpAmount,
        uint256 _minOut,
        address payable _receiver
    ) external returns (uint256);

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

    function getPrice(bool _maximise) external view returns (uint256);

    function convertFeesToLiquidity() external;
}
          

// SPDX-License-Identifier: MIT

pragma solidity 0.7.6;

interface IShortsTracker {
    function globalShortAveragePrices(
        address _token
    ) external view returns (uint256);

    function getNextGlobalShortData(
        address _account,
        address _collateralToken,
        address _indexToken,
        uint256 _nextPrice,
        uint256 _sizeDelta,
        bool _isIncrease
    ) external view returns (uint256, uint256);

    function updateGlobalShortData(
        address _account,
        address _collateralToken,
        address _indexToken,
        bool _isLong,
        uint256 _sizeDelta,
        uint256 _markPrice,
        bool _isIncrease
    ) external;
}
          

// SPDX-License-Identifier: MIT

pragma solidity 0.7.6;

interface IUSDPH {
    function mint(address _account, uint256 _amount) external;

    function burn(address _account, uint256 _amount) 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;

interface IWETH {
    function deposit() external payable;

    function withdraw(uint256) external;

    function approve(address guy, uint256 wad) external returns (bool);

    function transfer(address to, uint value) external returns (bool);

    function transferFrom(
        address src,
        address dst,
        uint256 wad
    ) external returns (bool);
}
          

// 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;
    }
}