// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/AccessControl.sol)

pragma solidity ^0.8.0;

import "./IAccessControlUpgradeable.sol";
import "../utils/ContextUpgradeable.sol";
import "../utils/StringsUpgradeable.sol";
import "../utils/introspection/ERC165Upgradeable.sol";
import "../proxy/utils/Initializable.sol";

/**
 * @dev Contract module that allows children to implement role-based access
 * control mechanisms. This is a lightweight version that doesn't allow enumerating role
 * members except through off-chain means by accessing the contract event logs. Some
 * applications may benefit from on-chain enumerability, for those cases see
 * {AccessControlEnumerable}.
 *
 * Roles are referred to by their `bytes32` identifier. These should be exposed
 * in the external API and be unique. The best way to achieve this is by
 * using `public constant` hash digests:
 *
 * ```solidity
 * bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
 * ```
 *
 * Roles can be used to represent a set of permissions. To restrict access to a
 * function call, use {hasRole}:
 *
 * ```solidity
 * function foo() public {
 *     require(hasRole(MY_ROLE, msg.sender));
 *     ...
 * }
 * ```
 *
 * Roles can be granted and revoked dynamically via the {grantRole} and
 * {revokeRole} functions. Each role has an associated admin role, and only
 * accounts that have a role's admin role can call {grantRole} and {revokeRole}.
 *
 * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
 * that only accounts with this role will be able to grant or revoke other
 * roles. More complex role relationships can be created by using
 * {_setRoleAdmin}.
 *
 * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
 * grant and revoke this role. Extra precautions should be taken to secure
 * accounts that have been granted it. We recommend using {AccessControlDefaultAdminRules}
 * to enforce additional security measures for this role.
 */
abstract contract AccessControlUpgradeable is Initializable, ContextUpgradeable, IAccessControlUpgradeable, ERC165Upgradeable {
    function __AccessControl_init() internal onlyInitializing {
    }

    function __AccessControl_init_unchained() internal onlyInitializing {
    }
    struct RoleData {
        mapping(address => bool) members;
        bytes32 adminRole;
    }

    mapping(bytes32 => RoleData) private _roles;

    bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;

    /**
     * @dev Modifier that checks that an account has a specific role. Reverts
     * with a standardized message including the required role.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     *
     * _Available since v4.1._
     */
    modifier onlyRole(bytes32 role) {
        _checkRole(role);
        _;
    }

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IAccessControlUpgradeable).interfaceId || super.supportsInterface(interfaceId);
    }

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) public view virtual override returns (bool) {
        return _roles[role].members[account];
    }

    /**
     * @dev Revert with a standard message if `_msgSender()` is missing `role`.
     * Overriding this function changes the behavior of the {onlyRole} modifier.
     *
     * Format of the revert message is described in {_checkRole}.
     *
     * _Available since v4.6._
     */
    function _checkRole(bytes32 role) internal view virtual {
        _checkRole(role, _msgSender());
    }

    /**
     * @dev Revert with a standard message if `account` is missing `role`.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     */
    function _checkRole(bytes32 role, address account) internal view virtual {
        if (!hasRole(role, account)) {
            revert(
                string(
                    abi.encodePacked(
                        "AccessControl: account ",
                        StringsUpgradeable.toHexString(account),
                        " is missing role ",
                        StringsUpgradeable.toHexString(uint256(role), 32)
                    )
                )
            );
        }
    }

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) public view virtual override returns (bytes32) {
        return _roles[role].adminRole;
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     *
     * May emit a {RoleGranted} event.
     */
    function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
        _grantRole(role, account);
    }

    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     *
     * May emit a {RoleRevoked} event.
     */
    function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
        _revokeRole(role, account);
    }

    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been revoked `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `account`.
     *
     * May emit a {RoleRevoked} event.
     */
    function renounceRole(bytes32 role, address account) public virtual override {
        require(account == _msgSender(), "AccessControl: can only renounce roles for self");

        _revokeRole(role, account);
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event. Note that unlike {grantRole}, this function doesn't perform any
     * checks on the calling account.
     *
     * May emit a {RoleGranted} event.
     *
     * [WARNING]
     * ====
     * This function should only be called from the constructor when setting
     * up the initial roles for the system.
     *
     * Using this function in any other way is effectively circumventing the admin
     * system imposed by {AccessControl}.
     * ====
     *
     * NOTE: This function is deprecated in favor of {_grantRole}.
     */
    function _setupRole(bytes32 role, address account) internal virtual {
        _grantRole(role, account);
    }

    /**
     * @dev Sets `adminRole` as ``role``'s admin role.
     *
     * Emits a {RoleAdminChanged} event.
     */
    function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
        bytes32 previousAdminRole = getRoleAdmin(role);
        _roles[role].adminRole = adminRole;
        emit RoleAdminChanged(role, previousAdminRole, adminRole);
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleGranted} event.
     */
    function _grantRole(bytes32 role, address account) internal virtual {
        if (!hasRole(role, account)) {
            _roles[role].members[account] = true;
            emit RoleGranted(role, account, _msgSender());
        }
    }

    /**
     * @dev Revokes `role` from `account`.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleRevoked} event.
     */
    function _revokeRole(bytes32 role, address account) internal virtual {
        if (hasRole(role, account)) {
            _roles[role].members[account] = false;
            emit RoleRevoked(role, account, _msgSender());
        }
    }

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[49] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library AddressUpgradeable {
    /**
     * @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
     *
     * Furthermore, `isContract` will also return true if the target contract within
     * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
     * which only has an effect at the end of a transaction.
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 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://consensys.net/diligence/blog/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/v0.8.0/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");

        (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 functionCallWithValue(target, data, 0, "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");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, 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) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, 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) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // 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
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.19;

import "@openzeppelin/contracts-upgradeable/token/ERC20/utils/SafeERC20Upgradeable.sol";
import "@openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol";
import "@openzeppelin/contracts-upgradeable/interfaces/IERC4626Upgradeable.sol";
import "../priceOracle/priceproviders/uniswapV2/IUniswapV2Pair.sol";
import "../priceOracle/priceproviders/uniswapV2/UniswapV2Library.sol";

/**
 * @title Asset Library
 * @notice A library for handling different types of assets, including ERC20 tokens, ERC4626 tokens, and Uniswap V2 LP tokens.
 */
library Asset {
    using SafeERC20Upgradeable for ERC20Upgradeable;

    enum Type {
        ERC20,
        ERC4626,
        LP
    }

    struct Info {
        address addr;
        Type tokenType;
    }

    /**
     * @notice Unwraps the specified amount of tokens based on their type.
     * @param _tokenInfo Information about the token, including its address and type.
     * @param _tokenAmount The amount of tokens to unwrap.
     * @return assets The unwrapped assets' addresses.
     * @return assetAmounts The amounts of the unwrapped assets.
     */
    function _unwrap(Info memory _tokenInfo, uint256 _tokenAmount) internal returns (address[] memory assets, uint256[] memory assetAmounts) {
        if (_tokenInfo.tokenType == Type.LP) {
            assets = new address[](2);
            assets[0] = IUniswapV2Pair(_tokenInfo.addr).token0();
            assets[1] = IUniswapV2Pair(_tokenInfo.addr).token1();
            if (_tokenAmount > 0) {
                assetAmounts = new uint256[](2);
                IUniswapV2Pair(_tokenInfo.addr).transfer(_tokenInfo.addr, _tokenAmount);
                (assetAmounts[0], assetAmounts[1]) = IUniswapV2Pair(_tokenInfo.addr).burn(address(this));
            }
        } else {
            assets = new address[](1);
            assetAmounts = new uint256[](1);
            if (_tokenInfo.tokenType == Type.ERC4626) {
                assets[0] = IERC4626Upgradeable(_tokenInfo.addr).asset();
                if (_tokenAmount > 0) {
                    assetAmounts[0] = IERC4626Upgradeable(_tokenInfo.addr).redeem(_tokenAmount, address(this), address(this));
                }
            } else {
                assets[0] = _tokenInfo.addr;
                assetAmounts[0] = _tokenAmount;
            }
        }
    }

    /**
     * @notice Wraps the specified amounts of assets into a token.
     * @param _assets The addresses of the assets to wrap.
     * @param _assetAmounts The amounts of the assets to wrap.
     * @param _tokenInfo Information about the token, including its address and type.
     * @return tokenAmount The amount of the wrapped token.
     */
    function _wrap(address[] memory _assets, uint256[] memory _assetAmounts, Info memory _tokenInfo) internal returns (uint256 tokenAmount) {
        if (_tokenInfo.tokenType == Type.LP) {
            if (_assetAmounts[0] > 0 && _assetAmounts[1] > 0) {
                (uint112 reserve0, uint112 reserve1, ) = IUniswapV2Pair(_tokenInfo.addr).getReserves();

                uint256 amountA;
                uint256 amountB;

                if (reserve0 == 0 && reserve1 == 0) {
                    (amountA, amountB) = (_assetAmounts[0], _assetAmounts[1]);
                } else {
                    uint256 amountBOptimal = UniswapV2Library.quote(_assetAmounts[0], reserve0, reserve1);
                    if (amountBOptimal <= _assetAmounts[1]) {
                        (amountA, amountB) = (_assetAmounts[0], amountBOptimal);
                    } else {
                        uint256 amountAOptimal = UniswapV2Library.quote(_assetAmounts[1], reserve1, reserve0);
                        assert(amountAOptimal <= _assetAmounts[0]);
                        (amountA, amountB) = (amountAOptimal, _assetAmounts[1]);
                    }
                }

                ERC20Upgradeable(_assets[0]).safeTransfer(_tokenInfo.addr, amountA);
                ERC20Upgradeable(_assets[1]).safeTransfer(_tokenInfo.addr, amountB);

                tokenAmount = IUniswapV2Pair(_tokenInfo.addr).mint(address(this));
            } else if (_assetAmounts[0] > 0) {
                ERC20Upgradeable(_assets[0]).safeTransfer(msg.sender, _assetAmounts[0]);
            } else if (_assetAmounts[1] > 0) {
                ERC20Upgradeable(_assets[1]).safeTransfer(msg.sender, _assetAmounts[1]);
            }
        } else if (_tokenInfo.tokenType == Type.ERC4626) {
            if (IERC4626Upgradeable(_tokenInfo.addr).previewDeposit(_assetAmounts[0]) > 0) {
                _safeIncreaseAllowance(_tokenInfo.addr, _assets[0], _assetAmounts[0]);
                tokenAmount = IERC4626Upgradeable(_tokenInfo.addr).deposit(_assetAmounts[0], address(this));
            }
        } else {
            tokenAmount = _assetAmounts[0];
        }
    }

    /**
     * @notice Redeems the redundant amount of tokens for the underlying assets.
     * @param _tokenInfo Information about the token, including its address and type.
     * @param _receiver The address that will receive the redeemed assets.
     * @return assets The redeemed assets' addresses.
     * @return assetAmounts The amounts of the redeemed assets.
     */
    function _redeem(Info memory _tokenInfo, address _receiver) internal returns (address[] memory assets, uint256[] memory assetAmounts) {
        uint256 _tokenAmount = IERC20Upgradeable(_tokenInfo.addr).balanceOf(address(this));
        if (_tokenInfo.tokenType == Type.LP) {
            assets = new address[](2);
            assets[0] = IUniswapV2Pair(_tokenInfo.addr).token0();
            assets[1] = IUniswapV2Pair(_tokenInfo.addr).token1();
            assetAmounts = new uint256[](2);
            if (_tokenAmount > 0) {
                IUniswapV2Pair(_tokenInfo.addr).transfer(_tokenInfo.addr, _tokenAmount);
                (assetAmounts[0], assetAmounts[1]) = IUniswapV2Pair(_tokenInfo.addr).burn(_receiver);
            }
            uint256 _token0Amount = ERC20Upgradeable(assets[0]).balanceOf(address(this));
            uint256 _token1Amount = ERC20Upgradeable(assets[1]).balanceOf(address(this));
            if (_token0Amount > 0) {
                assetAmounts[0] = _token0Amount;
                ERC20Upgradeable(assets[0]).safeTransfer(_receiver, _token0Amount);
            }
            if (_token1Amount > 0) {
                assetAmounts[1] = _token1Amount;
                ERC20Upgradeable(assets[1]).safeTransfer(_receiver, _token1Amount);
            }
        } else {
            if (_tokenInfo.tokenType == Type.ERC4626) {
                assets = new address[](2);
                assetAmounts = new uint256[](2);
                assets[0] = _tokenInfo.addr;
                assets[1] = IERC4626Upgradeable(_tokenInfo.addr).asset();
                if (_tokenAmount > 0) {
                    // Some ERC-4626 do not allow minting and burning in the same transaction
                    // In this case, ERC-4626 will be sent to the receiver
                    try IERC4626Upgradeable(_tokenInfo.addr).redeem(_tokenAmount, _receiver, address(this)) returns (uint256 amount) {
                        assetAmounts[1] = amount;
                    } catch {
                        ERC20Upgradeable(_tokenInfo.addr).safeTransfer(_receiver, _tokenAmount);
                        assetAmounts[0] = _tokenAmount;
                    }
                }
                uint256 _underlyingTokenAmount = ERC20Upgradeable(assets[1]).balanceOf(address(this));
                if (_underlyingTokenAmount > 0) {
                    ERC20Upgradeable(assets[1]).safeTransfer(_receiver, _underlyingTokenAmount);
                    assetAmounts[1] += _underlyingTokenAmount;
                }
            } else {
                assets = new address[](1);
                assetAmounts = new uint256[](1);
                assets[0] = _tokenInfo.addr;
                assetAmounts[0] = _tokenAmount;
                if (_tokenAmount > 0) {
                    ERC20Upgradeable(_tokenInfo.addr).safeTransfer(_receiver, _tokenAmount);
                }
            }
        }
    }

    /**
     * @notice Safely increases the allowance of a spender for a given token.
     * @param _spender The address allowed to spend the tokens.
     * @param _token The address of the token.
     * @param _tokenAmount The amount of tokens to allow.
     */
    function _safeIncreaseAllowance(address _spender, address _token, uint256 _tokenAmount) internal {
        uint256 allowanceAmount = ERC20Upgradeable(_token).allowance(address(this), _spender);
        if (allowanceAmount < _tokenAmount) {
            ERC20Upgradeable(_token).safeIncreaseAllowance(_spender, _tokenAmount - allowanceAmount);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;
import "../proxy/utils/Initializable.sol";

/**
 * @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 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 ContextUpgradeable is Initializable {
    function __Context_init() internal onlyInitializing {
    }

    function __Context_init_unchained() internal onlyInitializing {
    }
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[50] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)

pragma solidity ^0.8.0;

import "./IERC165Upgradeable.sol";
import "../../proxy/utils/Initializable.sol";

/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
 * for the additional interface id that will be supported. For example:
 *
 * ```solidity
 * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
 *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
 * }
 * ```
 *
 * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
 */
abstract contract ERC165Upgradeable is Initializable, IERC165Upgradeable {
    function __ERC165_init() internal onlyInitializing {
    }

    function __ERC165_init_unchained() internal onlyInitializing {
    }
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IERC165Upgradeable).interfaceId;
    }

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[50] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/ERC20.sol)

pragma solidity ^0.8.0;

import "./IERC20Upgradeable.sol";
import "./extensions/IERC20MetadataUpgradeable.sol";
import "../../utils/ContextUpgradeable.sol";
import "../../proxy/utils/Initializable.sol";

/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20PresetMinterPauser}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * The default value of {decimals} is 18. To change this, you should override
 * this function so it returns a different value.
 *
 * We have followed general OpenZeppelin Contracts guidelines: functions revert
 * instead returning `false` on failure. This behavior is nonetheless
 * conventional and does not conflict with the expectations of ERC20
 * applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
contract ERC20Upgradeable is Initializable, ContextUpgradeable, IERC20Upgradeable, IERC20MetadataUpgradeable {
    mapping(address => uint256) private _balances;

    mapping(address => mapping(address => uint256)) private _allowances;

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

    /**
     * @dev Sets the values for {name} and {symbol}.
     *
     * All two of these values are immutable: they can only be set once during
     * construction.
     */
    function __ERC20_init(string memory name_, string memory symbol_) internal onlyInitializing {
        __ERC20_init_unchained(name_, symbol_);
    }

    function __ERC20_init_unchained(string memory name_, string memory symbol_) internal onlyInitializing {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5.05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the default value returned by this function, unless
     * it's overridden.
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view virtual override returns (uint8) {
        return 18;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view virtual override returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address to, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _transfer(owner, to, amount);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on
     * `transferFrom`. This is semantically equivalent to an infinite approval.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * NOTE: Does not update the allowance if the current allowance
     * is the maximum `uint256`.
     *
     * Requirements:
     *
     * - `from` and `to` cannot be the zero address.
     * - `from` must have a balance of at least `amount`.
     * - the caller must have allowance for ``from``'s tokens of at least
     * `amount`.
     */
    function transferFrom(address from, address to, uint256 amount) public virtual override returns (bool) {
        address spender = _msgSender();
        _spendAllowance(from, spender, amount);
        _transfer(from, to, amount);
        return true;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, allowance(owner, spender) + addedValue);
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        address owner = _msgSender();
        uint256 currentAllowance = allowance(owner, spender);
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        unchecked {
            _approve(owner, spender, currentAllowance - subtractedValue);
        }

        return true;
    }

    /**
     * @dev Moves `amount` of tokens from `from` to `to`.
     *
     * This internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `from` must have a balance of at least `amount`.
     */
    function _transfer(address from, address to, uint256 amount) internal virtual {
        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(from, to, amount);

        uint256 fromBalance = _balances[from];
        require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
        unchecked {
            _balances[from] = fromBalance - amount;
            // Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by
            // decrementing then incrementing.
            _balances[to] += amount;
        }

        emit Transfer(from, to, amount);

        _afterTokenTransfer(from, to, amount);
    }

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _beforeTokenTransfer(address(0), account, amount);

        _totalSupply += amount;
        unchecked {
            // Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above.
            _balances[account] += amount;
        }
        emit Transfer(address(0), account, amount);

        _afterTokenTransfer(address(0), account, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        uint256 accountBalance = _balances[account];
        require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
        unchecked {
            _balances[account] = accountBalance - amount;
            // Overflow not possible: amount <= accountBalance <= totalSupply.
            _totalSupply -= amount;
        }

        emit Transfer(account, address(0), amount);

        _afterTokenTransfer(account, address(0), amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(address owner, address spender, uint256 amount) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    /**
     * @dev Updates `owner` s allowance for `spender` based on spent `amount`.
     *
     * Does not update the allowance amount in case of infinite allowance.
     * Revert if not enough allowance is available.
     *
     * Might emit an {Approval} event.
     */
    function _spendAllowance(address owner, address spender, uint256 amount) internal virtual {
        uint256 currentAllowance = allowance(owner, spender);
        if (currentAllowance != type(uint256).max) {
            require(currentAllowance >= amount, "ERC20: insufficient allowance");
            unchecked {
                _approve(owner, spender, currentAllowance - amount);
            }
        }
    }

    /**
     * @dev Hook that is called before any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * will be transferred to `to`.
     * - when `from` is zero, `amount` tokens will be minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual {}

    /**
     * @dev Hook that is called after any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * has been transferred to `to`.
     * - when `from` is zero, `amount` tokens have been minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens have been burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _afterTokenTransfer(address from, address to, uint256 amount) internal virtual {}

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[45] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol)

pragma solidity ^0.8.0;

/**
 * @dev External interface of AccessControl declared to support ERC165 detection.
 */
interface IAccessControlUpgradeable {
    /**
     * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
     *
     * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
     * {RoleAdminChanged} not being emitted signaling this.
     *
     * _Available since v3.1._
     */
    event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);

    /**
     * @dev Emitted when `account` is granted `role`.
     *
     * `sender` is the account that originated the contract call, an admin role
     * bearer except when using {AccessControl-_setupRole}.
     */
    event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Emitted when `account` is revoked `role`.
     *
     * `sender` is the account that originated the contract call:
     *   - if using `revokeRole`, it is the admin role bearer
     *   - if using `renounceRole`, it is the role bearer (i.e. `account`)
     */
    event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) external view returns (bool);

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {AccessControl-_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) external view returns (bytes32);

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function grantRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function revokeRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been granted `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `account`.
     */
    function renounceRole(bytes32 role, address account) external;
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.19;

interface IBLendingToken {
    /**
     * @notice Sender supplies assets into the market and receives cTokens in exchange
     * @dev Accrues interest whether or not the operation succeeds, unless reverted
     * @param minter the address of account which earn liquidity
     * @param mintAmount The amount of the underlying asset to supply to minter
     * return uint256 0=success, otherwise a failure (see ErrorReporter.sol for details)
     * return uint256 minted amount
     */
    function mintTo(address minter, uint256 mintAmount) external returns (uint256 err, uint256 mintedAmount);

    /**
     * @notice Sender redeems cTokens in exchange for the underlying asset
     * @dev Accrues interest whether or not the operation succeeds, unless reverted
     * @param redeemTokens The number of cTokens to redeem into underlying
     * @return uint256 0=success, otherwise a failure (see ErrorReporter.sol for details)
     */
    function redeemTo(address redeemer, uint256 redeemTokens) external returns (uint);

    /**
     * @notice Sender redeems cTokens in exchange for a specified amount of underlying asset
     * @dev Accrues interest whether or not the operation succeeds, unless reverted
     * @param redeemAmount The amount of underlying to redeem
     * @return uint256 0=success, otherwise a failure (see ErrorReporter.sol for details)
     */
    function redeemUnderlyingTo(address redeemer, uint256 redeemAmount) external returns (uint);

    function borrowTo(address borrower, uint256 borrowAmount) external returns (uint256 borrowError);

    function repayTo(address payer, address borrower, uint256 repayAmount) external returns (uint256 repayBorrowError, uint256 amountRepayed);

    function repayBorrowToBorrower(
        address projectToken,
        address payer,
        address borrower,
        uint256 repayAmount
    ) external returns (uint256 repayBorrowError, uint256 amountRepayed);

    /**
     * @notice Get the token balance of the `owner`
     * @param owner The address of the account to query
     * @return The number of tokens owned by `owner`
     */
    function balanceOf(address owner) external view returns (uint256);

    function borrowBalanceCurrent(address account) external returns (uint);

    function borrowBalanceStored(address account) external view returns (uint);

    function totalSupply() external view returns (uint256);

    function totalBorrows() external view returns (uint256);

    function exchangeRateStored() external view returns (uint256);

    function underlying() external view returns (address);

    function getEstimatedBorrowBalanceStored(address account) external view returns (uint256 accrual);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165Upgradeable {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.0;

import "../IERC20Upgradeable.sol";

/**
 * @dev Interface for the optional metadata functions from the ERC20 standard.
 *
 * _Available since v4.1._
 */
interface IERC20MetadataUpgradeable is IERC20Upgradeable {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the symbol of the token.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/extensions/IERC20Permit.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 */
interface IERC20PermitUpgradeable {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    /**
     * @dev Returns the current nonce for `owner`. This value must be
     * included whenever a signature is generated for {permit}.
     *
     * Every successful call to {permit} increases ``owner``'s nonce by one. This
     * prevents a signature from being used multiple times.
     */
    function nonces(address owner) external view returns (uint256);

    /**
     * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
     */
    // solhint-disable-next-line func-name-mixedcase
    function DOMAIN_SEPARATOR() external view returns (bytes32);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20Upgradeable {
    /**
     * @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);

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (interfaces/IERC4626.sol)

pragma solidity ^0.8.0;

import "../token/ERC20/IERC20Upgradeable.sol";
import "../token/ERC20/extensions/IERC20MetadataUpgradeable.sol";

/**
 * @dev Interface of the ERC4626 "Tokenized Vault Standard", as defined in
 * https://eips.ethereum.org/EIPS/eip-4626[ERC-4626].
 *
 * _Available since v4.7._
 */
interface IERC4626Upgradeable is IERC20Upgradeable, IERC20MetadataUpgradeable {
    event Deposit(address indexed sender, address indexed owner, uint256 assets, uint256 shares);

    event Withdraw(
        address indexed sender,
        address indexed receiver,
        address indexed owner,
        uint256 assets,
        uint256 shares
    );

    /**
     * @dev Returns the address of the underlying token used for the Vault for accounting, depositing, and withdrawing.
     *
     * - MUST be an ERC-20 token contract.
     * - MUST NOT revert.
     */
    function asset() external view returns (address assetTokenAddress);

    /**
     * @dev Returns the total amount of the underlying asset that is “managed” by Vault.
     *
     * - SHOULD include any compounding that occurs from yield.
     * - MUST be inclusive of any fees that are charged against assets in the Vault.
     * - MUST NOT revert.
     */
    function totalAssets() external view returns (uint256 totalManagedAssets);

    /**
     * @dev Returns the amount of shares that the Vault would exchange for the amount of assets provided, in an ideal
     * scenario where all the conditions are met.
     *
     * - MUST NOT be inclusive of any fees that are charged against assets in the Vault.
     * - MUST NOT show any variations depending on the caller.
     * - MUST NOT reflect slippage or other on-chain conditions, when performing the actual exchange.
     * - MUST NOT revert.
     *
     * NOTE: This calculation MAY NOT reflect the “per-user” price-per-share, and instead should reflect the
     * “average-user’s” price-per-share, meaning what the average user should expect to see when exchanging to and
     * from.
     */
    function convertToShares(uint256 assets) external view returns (uint256 shares);

    /**
     * @dev Returns the amount of assets that the Vault would exchange for the amount of shares provided, in an ideal
     * scenario where all the conditions are met.
     *
     * - MUST NOT be inclusive of any fees that are charged against assets in the Vault.
     * - MUST NOT show any variations depending on the caller.
     * - MUST NOT reflect slippage or other on-chain conditions, when performing the actual exchange.
     * - MUST NOT revert.
     *
     * NOTE: This calculation MAY NOT reflect the “per-user” price-per-share, and instead should reflect the
     * “average-user’s” price-per-share, meaning what the average user should expect to see when exchanging to and
     * from.
     */
    function convertToAssets(uint256 shares) external view returns (uint256 assets);

    /**
     * @dev Returns the maximum amount of the underlying asset that can be deposited into the Vault for the receiver,
     * through a deposit call.
     *
     * - MUST return a limited value if receiver is subject to some deposit limit.
     * - MUST return 2 ** 256 - 1 if there is no limit on the maximum amount of assets that may be deposited.
     * - MUST NOT revert.
     */
    function maxDeposit(address receiver) external view returns (uint256 maxAssets);

    /**
     * @dev Allows an on-chain or off-chain user to simulate the effects of their deposit at the current block, given
     * current on-chain conditions.
     *
     * - MUST return as close to and no more than the exact amount of Vault shares that would be minted in a deposit
     *   call in the same transaction. I.e. deposit should return the same or more shares as previewDeposit if called
     *   in the same transaction.
     * - MUST NOT account for deposit limits like those returned from maxDeposit and should always act as though the
     *   deposit would be accepted, regardless if the user has enough tokens approved, etc.
     * - MUST be inclusive of deposit fees. Integrators should be aware of the existence of deposit fees.
     * - MUST NOT revert.
     *
     * NOTE: any unfavorable discrepancy between convertToShares and previewDeposit SHOULD be considered slippage in
     * share price or some other type of condition, meaning the depositor will lose assets by depositing.
     */
    function previewDeposit(uint256 assets) external view returns (uint256 shares);

    /**
     * @dev Mints shares Vault shares to receiver by depositing exactly amount of underlying tokens.
     *
     * - MUST emit the Deposit event.
     * - MAY support an additional flow in which the underlying tokens are owned by the Vault contract before the
     *   deposit execution, and are accounted for during deposit.
     * - MUST revert if all of assets cannot be deposited (due to deposit limit being reached, slippage, the user not
     *   approving enough underlying tokens to the Vault contract, etc).
     *
     * NOTE: most implementations will require pre-approval of the Vault with the Vault’s underlying asset token.
     */
    function deposit(uint256 assets, address receiver) external returns (uint256 shares);

    /**
     * @dev Returns the maximum amount of the Vault shares that can be minted for the receiver, through a mint call.
     * - MUST return a limited value if receiver is subject to some mint limit.
     * - MUST return 2 ** 256 - 1 if there is no limit on the maximum amount of shares that may be minted.
     * - MUST NOT revert.
     */
    function maxMint(address receiver) external view returns (uint256 maxShares);

    /**
     * @dev Allows an on-chain or off-chain user to simulate the effects of their mint at the current block, given
     * current on-chain conditions.
     *
     * - MUST return as close to and no fewer than the exact amount of assets that would be deposited in a mint call
     *   in the same transaction. I.e. mint should return the same or fewer assets as previewMint if called in the
     *   same transaction.
     * - MUST NOT account for mint limits like those returned from maxMint and should always act as though the mint
     *   would be accepted, regardless if the user has enough tokens approved, etc.
     * - MUST be inclusive of deposit fees. Integrators should be aware of the existence of deposit fees.
     * - MUST NOT revert.
     *
     * NOTE: any unfavorable discrepancy between convertToAssets and previewMint SHOULD be considered slippage in
     * share price or some other type of condition, meaning the depositor will lose assets by minting.
     */
    function previewMint(uint256 shares) external view returns (uint256 assets);

    /**
     * @dev Mints exactly shares Vault shares to receiver by depositing amount of underlying tokens.
     *
     * - MUST emit the Deposit event.
     * - MAY support an additional flow in which the underlying tokens are owned by the Vault contract before the mint
     *   execution, and are accounted for during mint.
     * - MUST revert if all of shares cannot be minted (due to deposit limit being reached, slippage, the user not
     *   approving enough underlying tokens to the Vault contract, etc).
     *
     * NOTE: most implementations will require pre-approval of the Vault with the Vault’s underlying asset token.
     */
    function mint(uint256 shares, address receiver) external returns (uint256 assets);

    /**
     * @dev Returns the maximum amount of the underlying asset that can be withdrawn from the owner balance in the
     * Vault, through a withdraw call.
     *
     * - MUST return a limited value if owner is subject to some withdrawal limit or timelock.
     * - MUST NOT revert.
     */
    function maxWithdraw(address owner) external view returns (uint256 maxAssets);

    /**
     * @dev Allows an on-chain or off-chain user to simulate the effects of their withdrawal at the current block,
     * given current on-chain conditions.
     *
     * - MUST return as close to and no fewer than the exact amount of Vault shares that would be burned in a withdraw
     *   call in the same transaction. I.e. withdraw should return the same or fewer shares as previewWithdraw if
     *   called
     *   in the same transaction.
     * - MUST NOT account for withdrawal limits like those returned from maxWithdraw and should always act as though
     *   the withdrawal would be accepted, regardless if the user has enough shares, etc.
     * - MUST be inclusive of withdrawal fees. Integrators should be aware of the existence of withdrawal fees.
     * - MUST NOT revert.
     *
     * NOTE: any unfavorable discrepancy between convertToShares and previewWithdraw SHOULD be considered slippage in
     * share price or some other type of condition, meaning the depositor will lose assets by depositing.
     */
    function previewWithdraw(uint256 assets) external view returns (uint256 shares);

    /**
     * @dev Burns shares from owner and sends exactly assets of underlying tokens to receiver.
     *
     * - MUST emit the Withdraw event.
     * - MAY support an additional flow in which the underlying tokens are owned by the Vault contract before the
     *   withdraw execution, and are accounted for during withdraw.
     * - MUST revert if all of assets cannot be withdrawn (due to withdrawal limit being reached, slippage, the owner
     *   not having enough shares, etc).
     *
     * Note that some implementations will require pre-requesting to the Vault before a withdrawal may be performed.
     * Those methods should be performed separately.
     */
    function withdraw(uint256 assets, address receiver, address owner) external returns (uint256 shares);

    /**
     * @dev Returns the maximum amount of Vault shares that can be redeemed from the owner balance in the Vault,
     * through a redeem call.
     *
     * - MUST return a limited value if owner is subject to some withdrawal limit or timelock.
     * - MUST return balanceOf(owner) if owner is not subject to any withdrawal limit or timelock.
     * - MUST NOT revert.
     */
    function maxRedeem(address owner) external view returns (uint256 maxShares);

    /**
     * @dev Allows an on-chain or off-chain user to simulate the effects of their redeemption at the current block,
     * given current on-chain conditions.
     *
     * - MUST return as close to and no more than the exact amount of assets that would be withdrawn in a redeem call
     *   in the same transaction. I.e. redeem should return the same or more assets as previewRedeem if called in the
     *   same transaction.
     * - MUST NOT account for redemption limits like those returned from maxRedeem and should always act as though the
     *   redemption would be accepted, regardless if the user has enough shares, etc.
     * - MUST be inclusive of withdrawal fees. Integrators should be aware of the existence of withdrawal fees.
     * - MUST NOT revert.
     *
     * NOTE: any unfavorable discrepancy between convertToAssets and previewRedeem SHOULD be considered slippage in
     * share price or some other type of condition, meaning the depositor will lose assets by redeeming.
     */
    function previewRedeem(uint256 shares) external view returns (uint256 assets);

    /**
     * @dev Burns exactly shares from owner and sends assets of underlying tokens to receiver.
     *
     * - MUST emit the Withdraw event.
     * - MAY support an additional flow in which the underlying tokens are owned by the Vault contract before the
     *   redeem execution, and are accounted for during redeem.
     * - MUST revert if all of shares cannot be redeemed (due to withdrawal limit being reached, slippage, the owner
     *   not having enough shares, etc).
     *
     * NOTE: some implementations will require pre-requesting to the Vault before a withdrawal may be performed.
     * Those methods should be performed separately.
     */
    function redeem(uint256 shares, address receiver, address owner) external returns (uint256 assets);
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.19;

interface IPrimaryLendingPlatform {
    struct Ratio {
        uint8 numerator;
        uint8 denominator;
    }

    struct ProjectTokenInfo {
        bool isListed;
        bool isDepositPaused; // true - paused, false - not paused
        bool isWithdrawPaused; // true - paused, false - not paused
        Ratio loanToValueRatio;
    }

    struct LendingTokenInfo {
        bool isListed;
        bool isPaused;
        address bLendingToken;
    }

    struct DepositPosition {
        uint256 depositedProjectTokenAmount;
    }

    struct BorrowPosition {
        uint256 loanBody; // [loanBody] = lendingToken
        uint256 accrual; // [accrual] = lendingToken
    }

    //************* ADMIN CONTRACT FUNCTIONS ********************************

    /**
     * @dev Grants the role to a new account.
     * @param role The role to grant.
     * @param newModerator The address of the account receiving the role.
     */
    function grantRole(bytes32 role, address newModerator) external;

    /**
     * @dev Revokes the moderator role from an account.
     * @param role The role to revoke.
     * @param moderator The address of the account losing the role.
     */
    function revokeRole(bytes32 role, address moderator) external;

    /**
     * @dev Sets the address of the new moderator contract by the admin.
     * @param newModeratorContract The address of the new moderator contract.
     */
    function setPrimaryLendingPlatformModeratorModerator(address newModeratorContract) external;

    //************* MODERATOR CONTRACT FUNCTIONS ********************************

    /**
     * @dev Sets the address of the new price oracle by the moderator contract.
     * @param newPriceOracle The address of the new price oracle contract.
     */
    function setPriceOracle(address newPriceOracle) external;

    /**
     * @dev Sets the address of the new primary index token leverage contract by the moderator contract.
     * @param newPrimaryLendingPlatformLeverage The address of the new primary index token leverage contract.
     */
    function setPrimaryLendingPlatformLeverage(address newPrimaryLendingPlatformLeverage) external;

    /**
     * @dev Sets whether an address is a related contract or not by the moderator contract.
     * @param relatedContract The address of the contract to be set as related.
     * @param isRelated Boolean to indicate whether the contract is related or not.
     */
    function setRelatedContract(address relatedContract, bool isRelated) external;

    /**
     * @dev Removes a project token from the list by the moderator contract.
     * @param projectTokenId The ID of the project token to be removed.
     * @param projectToken The address of the project token to be removed.
     */
    function removeProjectToken(uint256 projectTokenId, address projectToken) external;

    /**
     * @dev Removes a lending token from the list by the moderator contract.
     * @param lendingTokenId The ID of the lending token to be removed.
     * @param lendingToken The address of the lending token to be removed.
     */
    function removeLendingToken(uint256 lendingTokenId, address lendingToken) external;

    /**
     * @dev Sets the borrow limit per collateral by the moderator contract.
     * @param projectToken The address of the project token.
     * @param newBorrowLimit The new borrow limit.
     */
    function setBorrowLimitPerCollateralAsset(address projectToken, uint256 newBorrowLimit) external;

    /**
     * @dev Sets the borrow limit per lending asset by the moderator contract.
     * @param lendingToken The address of the lending token.
     * @param newBorrowLimit The new borrow limit.
     */
    function setBorrowLimitPerLendingAsset(address lendingToken, uint256 newBorrowLimit) external;

    /**
     * @dev Sets the parameters for a project token
     * @param projectToken The address of the project token
     * @param isDepositPaused The new pause status for deposit
     * @param isWithdrawPaused The new pause status for withdrawal
     * @param loanToValueRatioNumerator The numerator of the loan-to-value ratio for the project token
     * @param loanToValueRatioDenominator The denominator of the loan-to-value ratio for the project token
     */
    function setProjectTokenInfo(
        address projectToken,
        bool isDepositPaused,
        bool isWithdrawPaused,
        uint8 loanToValueRatioNumerator,
        uint8 loanToValueRatioDenominator
    ) external;

    /**
     * @dev Sets the bLendingToken and paused status of a lending token.
     * @param lendingToken The address of the lending token.
     * @param bLendingToken The address of the bLendingToken.
     * @param isPaused Boolean indicating whether the lending token is paused or unpaused.
     * @param loanToValueRatioNumerator The numerator of the loan-to-value ratio for the lending token.
     * @param loanToValueRatioDenominator The denominator of the loan-to-value ratio for the lending token.
     */
    function setLendingTokenInfo(
        address lendingToken,
        address bLendingToken,
        bool isPaused,
        uint8 loanToValueRatioNumerator,
        uint8 loanToValueRatioDenominator
    ) external;

    //************* PUBLIC FUNCTIONS ********************************
    //************* Deposit FUNCTION ********************************

    /**
     * @dev Deposits project tokens and calculates the deposit position.
     * @param projectToken The address of the project token to be deposited.
     * @param projectTokenAmount The amount of project tokens to be deposited.
     */
    function deposit(address projectToken, uint256 projectTokenAmount) external;

    /**
     * @dev Deposits project tokens on behalf of a user from a related contract and calculates the deposit position.
     * @param projectToken The address of the project token to be deposited.
     * @param projectTokenAmount The amount of project tokens to be deposited.
     * @param user The address of the user who representative deposit.
     * @param beneficiary The address of the beneficiary whose deposit position will be updated.
     */
    function depositFromRelatedContracts(address projectToken, uint256 projectTokenAmount, address user, address beneficiary) external;

    /**
     * @dev Decreases the deposited project token amount of the user's deposit position by the given amount,
     * transfers the given amount of project tokens to the receiver, and returns the amount transferred.
     * @param projectToken The address of the project token being withdrawn
     * @param projectTokenAmount The amount of project tokens being withdrawn
     * @param user The address of the user whose deposit position is being updated
     * @param receiver The address of the user receiving the withdrawn project tokens
     * @return The amount of project tokens transferred to the receiver
     */
    function calcAndTransferDepositPosition(
        address projectToken,
        uint256 projectTokenAmount,
        address user,
        address receiver
    ) external returns (uint256);

    /**
     * @dev Calculates the deposit position for a user's deposit of a given amount of a project token.
     * @param projectToken The address of the project token being deposited
     * @param projectTokenAmount The amount of project tokens being deposited
     * @param user The address of the user making the deposit
     */
    function calcDepositPosition(address projectToken, uint256 projectTokenAmount, address user) external;

    //************* Withdraw FUNCTION ********************************

    /**
     * @dev Allows a user to withdraw a given amount of a project token from their deposit position.
     * @param projectToken The address of the project token being withdrawn
     * @param projectTokenAmount The amount of project tokens being withdrawn
     */
    function withdraw(address projectToken, uint256 projectTokenAmount) external;

    /**
     * @dev Allows a related contract to initiate a withdrawal of a given amount of a project token from a user's deposit position.
     * @param projectToken The address of the project token being withdrawn
     * @param projectTokenAmount The amount of project tokens being withdrawn
     * @param user The address of the user whose deposit position is being withdrawn from
     * @param beneficiary The address of the user receiving the withdrawn project tokens
     * @return amount of project tokens withdrawn and transferred to the beneficiary
     */
    function withdrawFromRelatedContracts(
        address projectToken,
        uint256 projectTokenAmount,
        address user,
        address beneficiary
    ) external returns (uint256);

    /**
     * @dev Allows a user to withdraw a given amount of a project token from their deposit position.
     * @param projectToken The address of the project token being withdrawn
     * @param projectTokenAmount The amount of project tokens being withdrawn
     * @param priceIds The priceIds need to update.
     * @param updateData The updateData provided by PythNetwork.
     */
    function withdraw(address projectToken, uint256 projectTokenAmount, bytes32[] memory priceIds, bytes[] calldata updateData) external payable;

    /**
     * @dev Allows a related contract to initiate a withdrawal of a given amount of a project token from a user's deposit position.
     * @param projectToken The address of the project token being withdrawn
     * @param projectTokenAmount The amount of project tokens being withdrawn
     * @param user The address of the user whose deposit position is being withdrawn from
     * @param beneficiary The address of the user receiving the withdrawn project tokens
     * @param priceIds The priceIds need to update.
     * @param updateData The updateData provided by PythNetwork.
     * @return amount of project tokens withdrawn and transferred to the beneficiary
     */
    function withdrawFromRelatedContracts(
        address projectToken,
        uint256 projectTokenAmount,
        address user,
        address beneficiary,
        bytes32[] memory priceIds,
        bytes[] calldata updateData
    ) external payable returns (uint256);

    //************* borrow FUNCTION ********************************

    /**
     * @dev Allows a user to borrow lending tokens by providing project tokens as collateral.
     * @param projectToken The address of the project token being used as collateral.
     * @param lendingToken The address of the lending token being borrowed.
     * @param lendingTokenAmount The amount of lending tokens to be borrowed.
     */
    function borrow(
        address projectToken,
        address lendingToken,
        uint256 lendingTokenAmount,
        bytes32[] memory priceIds,
        bytes[] calldata updateData
    ) external payable;

    /**
     * @dev Allows a related contract to borrow lending tokens on behalf of a user by providing project tokens as collateral.
     * @param projectToken The address of the project token being used as collateral.
     * @param lendingToken The address of the lending token being borrowed.
     * @param lendingTokenAmount The amount of lending tokens to be borrowed.
     * @param user The address of the user on whose behalf the lending tokens are being borrowed.
     * @return amount of lending tokens borrowed
     */
    function borrowFromRelatedContract(
        address projectToken,
        address lendingToken,
        uint256 lendingTokenAmount,
        address user,
        bytes32[] memory priceIds,
        bytes[] calldata updateData
    ) external payable returns (uint256 amount);

    /**
     * @dev Allows a user to borrow lending tokens by providing project tokens as collateral.
     * @param projectToken The address of the project token being used as collateral.
     * @param lendingToken The address of the lending token being borrowed.
     * @param lendingTokenAmount The amount of lending tokens to be borrowed.
     */
    function borrow(address projectToken, address lendingToken, uint256 lendingTokenAmount) external;

    /**
     * @dev Allows a related contract to borrow lending tokens on behalf of a user by providing project tokens as collateral.
     * @param projectToken The address of the project token being used as collateral.
     * @param lendingToken The address of the lending token being borrowed.
     * @param lendingTokenAmount The amount of lending tokens to be borrowed.
     * @param user The address of the user on whose behalf the lending tokens are being borrowed.
     * @return amount of lending tokens borrowed
     */
    function borrowFromRelatedContract(
        address projectToken,
        address lendingToken,
        uint256 lendingTokenAmount,
        address user
    ) external returns (uint256 amount);

    /**
     * @dev Calculates the collateral available for withdrawal based on the loan-to-value ratio of a specific project token.
     * @param account Address of the user.
     * @param projectToken Address of the project token.
     * @param lendingToken Address of the lending token.
     * @return collateralProjectToWithdraw The amount of collateral available for withdrawal in the project token.
     */
    function getCollateralAvailableToWithdraw(
        address account,
        address projectToken,
        address lendingToken
    ) external returns (uint256 collateralProjectToWithdraw);

    //************* Supply FUNCTION ********************************

    /**
     * @notice Supplies a specified amount of a lending token to the platform.
     * @dev Allows a user to supply a specified amount of a lending token to the platform.
     * @param lendingToken The address of the lending token being supplied.
     * @param lendingTokenAmount The amount of the lending token being supplied.
     * @param priceIds An array of price identifiers used to update the price oracle.
     * @param updateData An array of update data used to update the price oracle.
     *
     * Requirements:
     * - The lending token is listed.
     * - The lending token is not paused.
     * - The lending token amount is greater than 0.
     * - Minting the bLendingTokens is successful and the minted amount is greater than 0.
     *
     * Effects:
     * - Mints the corresponding bLendingTokens and credits them to the user.
     */
    function supply(address lendingToken, uint256 lendingTokenAmount, bytes32[] memory priceIds, bytes[] calldata updateData) external payable;

    /**
     * @dev Supplies a certain amount of lending tokens to the platform from a specific user.
     *
     * Requirements:
     * - The lending token is listed.
     * - Called by a related contract.
     * - The lending token is not paused.
     * - The lending token amount is greater than 0.
     * - Minting the bLendingTokens is successful and the minted amount is greater than 0.
     *
     * Effects:
     * - Mints the corresponding bLendingTokens and credits them to the user.
     * @param lendingToken Address of the lending token.
     * @param lendingTokenAmount Amount of lending tokens to be supplied.
     * @param user Address of the user.
     * @param priceIds An array of price identifiers used to update the price oracle.
     * @param updateData An array of update data used to update the price oracle.
     */
    function supplyFromRelatedContract(
        address lendingToken,
        uint256 lendingTokenAmount,
        address user,
        bytes32[] memory priceIds,
        bytes[] calldata updateData
    ) external payable;

    //************* Redeem FUNCTION ********************************

    /**
     * @notice Redeems a specified amount of bLendingToken from the platform.
     * @dev Function that performs the redemption of bLendingToken and returns the corresponding lending token to user.
     *
     * Requirements:
     * - The lendingToken is listed.
     * - The lending token should not be paused.
     * - The bLendingTokenAmount should be greater than zero.
     * - The redemption of bLendingToken should not result in a redemption error.
     *
     * Effects:
     * - Burns the bLendingTokens from the user.
     * - Transfers the corresponding lending tokens to the user.
     * @param lendingToken Address of the lending token.
     * @param bLendingTokenAmount Amount of bLending tokens to be redeemed.
     * @param priceIds An array of price identifiers used to update the price oracle.
     * @param updateData An array of update data used to update the price oracle.
     */
    function redeem(address lendingToken, uint256 bLendingTokenAmount, bytes32[] memory priceIds, bytes[] calldata updateData) external payable;

    /**
     * @dev Function that performs the redemption of bLendingToken on behalf of a user and returns the corresponding lending token to the user by related contract.
     *
     * Requirements:
     * - The lendingToken is listed.
     _ - Called by a related contract.
     * - The lending token should not be paused.
     * - The bLendingTokenAmount should be greater than zero.
     * - The redemption of bLendingToken should not result in a redemption error.
     *
     * Effects:
     * - Burns the bLendingTokens from the user.
     * - Transfers the corresponding lending tokens to the user.
     * @param lendingToken Address of the lending token.
     * @param bLendingTokenAmount Amount of bLending tokens to be redeemed.
     * @param user Address of the user.
     * @param priceIds An array of price identifiers used to update the price oracle.
     * @param updateData An array of update data used to update the price oracle.
     */
    function redeemFromRelatedContract(
        address lendingToken,
        uint256 bLendingTokenAmount,
        address user,
        bytes32[] memory priceIds,
        bytes[] calldata updateData
    ) external payable;

    //************* RedeemUnderlying FUNCTION ********************************

    /**
     * @notice Redeems a specified amount of lendingToken from the platform.
     * @dev Function that performs the redemption of lending token and returns the corresponding underlying token to user.
     *
     * Requirements:
     * - The lending token is listed.
     * - The lending token should not be paused.
     * - The lendingTokenAmount should be greater than zero.
     * - The redemption of lendingToken should not result in a redemption error.
     *
     * Effects:
     * - Transfers the corresponding underlying tokens to the user.
     * @param lendingToken Address of the lending token.
     * @param lendingTokenAmount Amount of lending tokens to be redeemed.
     * @param priceIds An array of price identifiers used to update the price oracle.
     * @param updateData An array of update data used to update the price oracle.
     */
    function redeemUnderlying(
        address lendingToken,
        uint256 lendingTokenAmount,
        bytes32[] memory priceIds,
        bytes[] calldata updateData
    ) external payable;

    /**
     * @dev Function that performs the redemption of lending token on behalf of a user and returns the corresponding underlying token to the user by related contract.
     *
     * Requirements:
     * - The lending token is listed.
     * - Called by a related contract.
     * - The lending token should not be paused.
     * - The lendingTokenAmount should be greater than zero.
     * - The redemption of lendingToken should not result in a redemption error.
     *
     * Effects:
     * - Transfers the corresponding underlying tokens to the user.
     * @param lendingToken Address of the lending token.
     * @param lendingTokenAmount Amount of lending tokens to be redeemed.
     * @param user Address of the user.
     */
    function redeemUnderlyingFromRelatedContract(
        address lendingToken,
        uint256 lendingTokenAmount,
        address user,
        bytes32[] memory priceIds,
        bytes[] calldata updateData
    ) external payable;

    //************* borrow FUNCTION ********************************

    /**
     * @dev Allows a related contract to calculate the new borrow position of a user.
     * @param borrower The address of the user for whom the borrow position is being calculated.
     * @param projectToken The address of the project token being used as collateral.
     * @param lendingToken The address of the lending token being borrowed.
     * @param lendingTokenAmount The amount of lending tokens being borrowed.
     * @param currentLendingToken The address of the current lending token being used as collateral.
     */
    function calcBorrowPosition(
        address borrower,
        address projectToken,
        address lendingToken,
        uint256 lendingTokenAmount,
        address currentLendingToken
    ) external;

    /**
     * @dev Calculates the lending token available amount for borrowing.
     * @param account Address of the user.
     * @param projectToken Address of the project token.
     * @param lendingToken Address of the lending token.
     * @return availableToBorrow The amount of lending token available amount for borrowing.
     */
    function getLendingAvailableToBorrow(address account, address projectToken, address lendingToken) external returns (uint256 availableToBorrow);

    //************* repay FUNCTION ********************************

    /**
     * @dev Allows a borrower to repay their outstanding loan for a given project token and lending token.
     * @param projectToken The project token's address
     * @param lendingToken The lending token's address
     * @param lendingTokenAmount The amount of lending tokens to repay
     * @return amount of lending tokens actually repaid
     */
    function repay(address projectToken, address lendingToken, uint256 lendingTokenAmount) external returns (uint256);

    /**
     * @dev Allows a related contract to repay the outstanding loan for a given borrower's project token and lending token.
     * @param projectToken The project token's address
     * @param lendingToken The lending token's address
     * @param lendingTokenAmount The amount of lending tokens to repay
     * @param repairer The address that initiated the repair transaction
     * @param borrower The borrower's address
     * @return amount of lending tokens actually repaid
     */
    function repayFromRelatedContract(
        address projectToken,
        address lendingToken,
        uint256 lendingTokenAmount,
        address repairer,
        address borrower
    ) external returns (uint256);

    /**
     * @dev This function is called to update the interest in a borrower's borrow position.
     * @param account Address of the borrower.
     * @param lendingToken Address of the lending token.
     */
    function updateInterestInBorrowPositions(address account, address lendingToken) external;

    //************* VIEW FUNCTIONS ********************************

    /**@dev This function is called when performing operations using token prices, to determine which tokens will need to update their final price.
     * @param projectToken Address of the project token.
     * @param actualLendingToken Address of the lending token.
     * @param isBorrow Whether getting the list of tokens for updateFinalPrices is related to the borrowing operation or not.
     * @return Array of tokens that need to update final price.
     */
    function getTokensUpdateFinalPrices(address projectToken, address actualLendingToken, bool isBorrow) external view returns (address[] memory);

    /**
     * @dev return address of price oracle with interface of PriceProviderAggregator
     */
    function priceOracle() external view returns (address);

    /**
     * @dev return address project token in array `projectTokens`
     * @param projectTokenId - index of project token in array `projectTokens`. Numerates from 0 to array length - 1
     */
    function projectTokens(uint256 projectTokenId) external view returns (address);

    /**
     * @dev return address lending token in array `lendingTokens`
     * @param lendingTokenId - index of lending token in array `lendingTokens`. Numerates from 0 to array length - 1
     */
    function lendingTokens(uint256 lendingTokenId) external view returns (address);

    /**
     * @dev Returns the info of the project token.
     * @return The address of the project token
     */
    function projectTokenInfo(address projectToken) external view returns (ProjectTokenInfo memory);

    /**
     * @dev Returns the address of the lending token.
     * @return The address of the lending token.
     */
    function lendingTokenInfo(address lendingToken) external view returns (LendingTokenInfo memory);

    /**
     * @dev Returns whether an address is a related contract or not.
     * @param relatedContract The address of the contract to check.
     * @return isRelated Boolean indicating whether the contract is related or not.
     */
    function getRelatedContract(address relatedContract) external view returns (bool);

    /**
     * @dev Returns the borrow limit per lending token.
     * @return The address of the lending token.
     */
    function borrowLimitPerLendingToken(address lendingToken) external view returns (uint256);

    /**
     * @dev Returns the borrow limit per collateral token.
     * @return The address of the project token.
     */
    function borrowLimitPerCollateral(address projectToken) external view returns (uint256);

    /**
     * @dev return total amount of deposited project token
     * @param projectToken - address of project token in array `projectTokens`. Numerates from 0 to array length - 1
     */
    function totalDepositedProjectToken(address projectToken) external view returns (uint256);

    /**
     * @dev return total borrow amount of `lendingToken` by `projectToken`
     * @param projectToken - address of project token
     * @param lendingToken - address of lending token
     */
    function totalBorrow(address projectToken, address lendingToken) external view returns (uint256);

    /**
     * @dev Returns the PIT (primary index token) value for a given account and position after a position is opened
     * @param account Address of the account.
     * @param projectToken Address of the project token.
     * @param lendingToken Address of the lending token.
     * @return The PIT value.
     * Formula: pit = $ * LVR
     */
    function pit(address account, address projectToken, address lendingToken) external view returns (uint256);

    /**
     * @dev Returns the PIT (primary index token) value for a given account and collateral before a position is opened
     * @param account Address of the account.
     * @param projectToken Address of the project token.
     * @return The PIT value.
     * Formula: pit = $ * LVR
     */
    function pitCollateral(address account, address projectToken) external view returns (uint256);

    /**
     * @dev Returns the actual lending token of a user's borrow position for a specific project token
     * @param user The address of the user's borrow position
     * @param projectToken The address of the project token
     * @return actualLendingToken The address of the actual lending token
     */
    function getLendingToken(address user, address projectToken) external view returns (address actualLendingToken);

    /**
     * @dev Returns the remaining PIT (primary index token) of a user's borrow position
     * @param account The address of the user's borrow position
     * @param projectToken The address of the project token
     * @param lendingToken The address of the lending token
     * @return remaining The remaining PIT of the user's borrow position
     */
    function pitRemaining(address account, address projectToken, address lendingToken) external view returns (uint256 remaining);

    /**
     * @dev Returns the total outstanding amount of a user's borrow position for a specific project token and lending token
     * @param account The address of the user's borrow position
     * @param projectToken The address of the project token
     * @param lendingToken The address of the lending token
     * @return total outstanding amount of the user's borrow position
     */
    function totalOutstanding(address account, address projectToken, address lendingToken) external view returns (uint256);

    /**
     * @dev Returns the health factor of a user's borrow position for a specific project token and lending token
     * @param account The address of the user's borrow position
     * @param projectToken The address of the project token
     * @param lendingToken The address of the lending token
     * @return numerator The numerator of the health factor
     * @return denominator The denominator of the health factor
     */
    function healthFactor(address account, address projectToken, address lendingToken) external view returns (uint256 numerator, uint256 denominator);

    /**
     * @dev Returns the evaluation of a specific token amount in USD
     * @param token The address of the token to evaluate
     * @param tokenAmount The amount of the token to evaluate
     * @return collateralEvaluation the USD evaluation of token by its `tokenAmount` in collateral price
     * @return capitalEvaluation the USD evaluation of token by its `tokenAmount` in capital price
     */
    function getTokenEvaluation(address token, uint256 tokenAmount) external view returns (uint256 collateralEvaluation, uint256 capitalEvaluation);

    /**
     * @dev Returns the length of the lending tokens array
     * @return The length of the lending tokens array
     */
    function lendingTokensLength() external view returns (uint256);

    /**
     * @dev Returns the length of the project tokens array
     * @return The length of the project tokens array
     */
    function projectTokensLength() external view returns (uint256);

    /**
     * @dev Returns the details of a user's borrow position for a specific project token and lending token
     * @param account The address of the user's borrow position
     * @param projectToken The address of the project token
     * @param lendingToken The address of the lending token
     * @return depositedProjectTokenAmount The amount of project tokens deposited by the user
     * @return loanBody The amount of the lending token borrowed by the user
     * @return accrual The accrued interest of the borrow position
     * @return healthFactorNumerator The numerator of the health factor
     * @return healthFactorDenominator The denominator of the health factor
     */
    function getPosition(
        address account,
        address projectToken,
        address lendingToken
    )
        external
        view
        returns (
            uint256 depositedProjectTokenAmount,
            uint256 loanBody,
            uint256 accrual,
            uint256 healthFactorNumerator,
            uint256 healthFactorDenominator
        );

    /**
     * @dev Returns the amount of project tokens deposited by a user for a specific project token and collateral token
     * @param projectToken The address of the project token
     * @param user The address of the user
     * @return amount of project tokens deposited by the user
     */
    function getDepositedAmount(address projectToken, address user) external view returns (uint);

    /**
     * @dev Get total borrow amount in USD per collateral for a specific project token
     * @param projectToken The address of the project token
     * @return The total borrow amount in USD
     */
    function getTotalBorrowPerCollateral(address projectToken) external view returns (uint);

    /**
     * @dev Get total borrow amount in USD for a specific lending token
     * @param lendingToken The address of the lending token
     * @return The total borrow amount in USD
     */
    function getTotalBorrowPerLendingToken(address lendingToken) external view returns (uint);

    /**
     * @dev Convert the total outstanding amount of a user's borrow position to USD
     * @param account The address of the user account
     * @param projectToken The address of the project token
     * @param lendingToken The address of the lending token
     * @return The total outstanding amount in USD
     */
    function totalOutstandingInUSD(address account, address projectToken, address lendingToken) external view returns (uint256);

    /**
     * @dev Get the loan to value ratio of a position taken by a project token and a lending token
     * @param projectToken The address of the project token
     * @param lendingToken The address of the lending token
     * @return lvrNumerator The numerator of the loan to value ratio
     * @return lvrDenominator The denominator of the loan to value ratio
     */
    function getLoanToValueRatio(address projectToken, address lendingToken) external view returns (uint256 lvrNumerator, uint256 lvrDenominator);

    /**
     * @dev Returns the PIT (primary index token) value for a given account and collateral before a position is opened after update price.
     * @param account Address of the account.
     * @param projectToken Address of the project token.
     * @param priceIds The priceIds need to update.
     * @param updateData The updateData provided by PythNetwork.
     * @return The PIT value.
     * Formula: pit = $ * LVR
     */
    function pitCollateralWithUpdatePrices(
        address account,
        address projectToken,
        bytes32[] memory priceIds,
        bytes[] calldata updateData
    ) external payable returns (uint256);

    /**
     * @dev Returns the remaining PIT (primary index token) of a user's borrow position after update price.
     * @param account The address of the user's borrow position
     * @param projectToken The address of the project token
     * @param lendingToken The address of the lending token
     * @param priceIds The priceIds need to update.
     * @param updateData The updateData provided by PythNetwork.
     * @return remaining The remaining PIT of the user's borrow position
     */
    function pitRemainingWithUpdatePrices(
        address account,
        address projectToken,
        address lendingToken,
        bytes32[] memory priceIds,
        bytes[] calldata updateData
    ) external payable returns (uint256);

    /**
     * @dev Returns the estimated remaining PIT (primary index token) of a user's borrow position
     * @param account The address of the user's borrow position
     * @param projectToken The address of the project token
     * @param lendingToken The address of the lending token
     * @param priceIds The priceIds need to update.
     * @param updateData The updateData provided by PythNetwork.
     * @return remaining The estimated remaining PIT of the user's borrow position
     */
    function estimatedPitRemainingWithUpdatePrices(
        address account,
        address projectToken,
        address lendingToken,
        bytes32[] memory priceIds,
        bytes[] calldata updateData
    ) external payable returns (uint256);

    /**
     * @dev Returns the evaluation of a specific token amount in USD after update price.
     * @param token The address of the token to evaluate
     * @param tokenAmount The amount of the token to evaluate
     * @param priceIds The priceIds need to update.
     * @param updateData The updateData provided by PythNetwork.
     * @return The evaluated token amount in USD
     */
    function getTokenEvaluationWithUpdatePrices(
        address token,
        uint256 tokenAmount,
        bytes32[] memory priceIds,
        bytes[] calldata updateData
    ) external payable returns (uint256);

    /**
     * @dev Returns the details of a user's borrow position for a specific project token and lending token after update price
     * @param account The address of the user's borrow position
     * @param projectToken The address of the project token
     * @param lendingToken The address of the lending token
     * @param priceIds The priceIds need to update.
     * @param updateData The updateData provided by PythNetwork.
     * @return depositedProjectTokenAmount The amount of project tokens deposited by the user
     * @return loanBody The amount of the lending token borrowed by the user
     * @return accrual The accrued interest of the borrow position
     * @return healthFactorNumerator The numerator of the health factor
     * @return healthFactorDenominator The denominator of the health factor
     */
    function getPositionWithUpdatePrices(
        address account,
        address projectToken,
        address lendingToken,
        bytes32[] memory priceIds,
        bytes[] calldata updateData
    )
        external
        payable
        returns (
            uint256 depositedProjectTokenAmount,
            uint256 loanBody,
            uint256 accrual,
            uint256 healthFactorNumerator,
            uint256 healthFactorDenominator
        );

    /**
     * @dev Returns the total estimated outstanding amount of a user's borrow position to USD after update price.
     * @param account The address of the user account
     * @param projectToken The address of the project token
     * @param lendingToken The address of the lending token
     * @param priceIds The priceIds need to update.
     * @param updateData The updateData provided by PythNetwork.
     * @return The total estimated outstanding amount in USD
     */
    function totalEstimatedOutstandingInUSDWithUpdatePrices(
        address account,
        address projectToken,
        address lendingToken,
        bytes32[] memory priceIds,
        bytes[] calldata updateData
    ) external payable returns (uint256);

    /**
     * @dev Convert the remaining pit amount to the corresponding lending token amount after update price.
     * @param account The address of the user account
     * @param projectToken The address of the project token
     * @param lendingToken The address of the lending token
     * @param priceIds The priceIds need to update.
     * @param updateData The updateData provided by PythNetwork.
     * @return The converted lending token amount
     */
    function convertPitRemainingWithUpdatePrices(
        address account,
        address projectToken,
        address lendingToken,
        bytes32[] memory priceIds,
        bytes[] calldata updateData
    ) external payable returns (uint256);

    /**
     * @dev Convert the estimated remaining pit amount to the corresponding lending token amount after update price.
     * @param account The address of the user account
     * @param projectToken The address of the project token
     * @param lendingToken The address of the lending token
     * @param priceIds The priceIds need to update.
     * @param updateData The updateData provided by PythNetwork.
     * @return The estimated lending token amount
     */
    function convertEstimatedPitRemainingWithUpdatePrices(
        address account,
        address projectToken,
        address lendingToken,
        bytes32[] memory priceIds,
        bytes[] calldata updateData
    ) external payable returns (uint256);

    /**
     * @dev Calculates the collateral available for withdrawal based on the loan-to-value ratio of a specific project token after update price.
     * @param account Address of the user.
     * @param projectToken Address of the project token.
     * @param lendingToken Address of the lending token.
     * @param priceIds The priceIds need to update.
     * @param updateData The updateData provided by PythNetwork.
     * @return collateralProjectToWithdraw The amount of collateral available for withdrawal in the project token.
     */
    function getCollateralAvailableToWithdrawWithUpdatePrices(
        address account,
        address projectToken,
        address lendingToken,
        bytes32[] memory priceIds,
        bytes[] calldata updateData
    ) external payable returns (uint256 collateralProjectToWithdraw);

    /**
     * @dev Calculates the lending token available amount for borrowing after update price.
     * @param account Address of the user.
     * @param projectToken Address of the project token.
     * @param lendingToken Address of the lending token.
     * @param priceIds The priceIds need to update.
     * @param updateData The updateData provided by PythNetwork.
     * @return availableToBorrow The amount of lending token available amount for borrowing.
     */
    function getLendingAvailableToBorrow(
        address account,
        address projectToken,
        address lendingToken,
        bytes32[] memory priceIds,
        bytes[] calldata updateData
    ) external payable returns (uint256 availableToBorrow);
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.19;

import "../util/Asset.sol";

interface IPrimaryLendingPlatformLeverage {
    /**
     * @dev Checks if a user has a leverage position for a project token.
     * @param user The address of the user.
     * @param projectToken The address of the project token.
     */
    function isLeveragePosition(address user, address projectToken) external view returns (bool);

    /**
     * @dev Deletes a leverage position for a user and project token.
     * @param user The address of the user.
     * @param projectToken The address of the project token.
     */
    function deleteLeveragePosition(address user, address projectToken) external;

    /**
     * @dev Calculates the additional collateral amount needed for the specified user and project token.
     * @param user The address of the user.
     * @param projectToken The address of the project token.
     * @param marginCollateralCount The margin collateral amount.
     * @return addingAmount The additional collateral amount needed.
     */
    function calculateAddingAmount(address user, address projectToken, uint256 marginCollateralCount) external view returns (uint256 addingAmount);

    /**
     * @dev Allows a related contract to borrow funds on behalf of a user to enter a leveraged position and update related token's prices.
     * @param prjInfo Information about the project token, including its address and type.
     * @param lendingInfo Information about the lending token, including its address and type.
     * @param notionalExposure The notional exposure of the user's investment.
     * @param marginCollateralAmount The amount of collateral to be deposited by the user.
     * @param buyCalldata The calldata used for buying the project token on the DEX.
     * @param borrower The address of the user for whom the funds are being borrowed.
     * @param leverageType The type of leverage position.
     * @param priceIds An array of bytes32 price identifiers to update.
     * @param updateData An array of bytes update data for the corresponding price identifiers.
     */
    function leveragedBorrowFromRelatedContract(
        Asset.Info memory prjInfo,
        Asset.Info memory lendingInfo,
        uint notionalExposure,
        uint marginCollateralAmount,
        bytes[] memory buyCalldata,
        address borrower,
        uint8 leverageType,
        bytes32[] memory priceIds,
        bytes[] calldata updateData
    ) external payable;
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.19;

import "../util/Asset.sol";

interface IPrimaryLendingPlatformLiquidation {

    /**
     * @dev The function to be called when a user wants to liquidate their position. Support liquidation with hot borrowing or not.
     * @param _account The address of the borrower
     * @param _prjInfo Information about the project token, including its address and type.
     * @param _lendingInfo Information about the lending token, including its address and type.
     * @param _lendingTokenAmount The amount of lending tokens to be used for liquidation
     * @param priceIds An array of bytes32 price identifiers to update.
     * @param updateData An array of bytes update data for the corresponding price identifiers.
     * @param buyCalldata The calldata for buying the lending token from the exchange aggregator. If the calldata is empty, the liquidation will execute liquidation without hot borrowing.
     */
    function liquidate(
        address _account,
        Asset.Info memory _prjInfo,
        Asset.Info memory _lendingInfo,
        uint256 _lendingTokenAmount,
        bytes32[] memory priceIds,
        bytes[] calldata updateData,
        bytes[] memory buyCalldata
    ) external payable returns (address[] memory assets, uint256[] memory assetAmounts);

    /**
     * @dev The function to be called when a user wants to liquidate their position. Support liquidation with hot borrowing or not.
     * @param _account The address of the borrower
     * @param _prjInfo Information about the project token, including its address and type.
     * @param _lendingInfo Information about the lending token, including its address and type.
     * @param _lendingTokenAmount The amount of lending tokens to be used for liquidation
     * @param liquidator The address of the liquidator
     * @param priceIds An array of bytes32 price identifiers to update.
     * @param updateData An array of bytes update data for the corresponding price identifiers.
     * @param buyCalldata The calldata for buying the lending token from the exchange aggregator. If the calldata is empty, the liquidation will execute liquidation without hot borrowing.
     */
    function liquidateFromModerator(
        address _account,
        Asset.Info memory _prjInfo,
        Asset.Info memory _lendingInfo,
        uint256 _lendingTokenAmount,
        address liquidator,
        bytes32[] memory priceIds,
        bytes[] calldata updateData,
        bytes[] memory buyCalldata
    ) external payable returns (address[] memory assets, uint256[] memory assetAmounts);


    /**
     * @dev Returns the minimum and maximum liquidation amount for a given account, project token, and lending token after updating related token's prices.
     *
     * Formula: 
     * - MinLA = min(MaxLA, MPA)
     * - MaxLA = (LVR * CVc - THF * LVc) / (LRF * LVR - THF)
     * @param _account The account for which to calculate the liquidation amount.
     * @param _projectToken The project token address.
     * @param _lendingToken The lending token address.
     * @param priceIds An array of bytes32 price identifiers to update.
     * @param updateData An array of bytes update data for the corresponding price identifiers.
     * @return maxLA The maximum liquidation amount.
     * @return minLA The minimum liquidation amount.
     */
    function getLiquidationAmountWithUpdatePrices(
        address _account,
        address _projectToken,
        address _lendingToken,
        bytes32[] memory priceIds,
        bytes[] calldata updateData
    ) external payable returns (uint256 maxLA, uint256 minLA);
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.19;

interface IUniswapV2Pair {
    event Approval(address indexed owner, address indexed spender, uint value);
    event Transfer(address indexed from, address indexed to, uint value);

    function name() external pure returns (string memory);
    function symbol() external pure returns (string memory);
    function decimals() external pure returns (uint8);
    function totalSupply() external view returns (uint);
    function balanceOf(address owner) external view returns (uint);
    function allowance(address owner, address spender) external view returns (uint);

    function approve(address spender, uint value) external returns (bool);
    function transfer(address to, uint value) external returns (bool);
    function transferFrom(address from, address to, uint value) external returns (bool);

    function DOMAIN_SEPARATOR() external view returns (bytes32);
    function PERMIT_TYPEHASH() external pure returns (bytes32);
    function nonces(address owner) external view returns (uint);

    function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;

    event Mint(address indexed sender, uint amount0, uint amount1);
    event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
    event Swap(
        address indexed sender,
        uint amount0In,
        uint amount1In,
        uint amount0Out,
        uint amount1Out,
        address indexed to
    );
    event Sync(uint112 reserve0, uint112 reserve1);

    function MINIMUM_LIQUIDITY() external pure returns (uint);
    function factory() external view returns (address);
    function token0() external view returns (address);
    function token1() external view returns (address);
    function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
    function price0CumulativeLast() external view returns (uint);
    function price1CumulativeLast() external view returns (uint);
    function kLast() external view returns (uint);

    function mint(address to) external returns (uint liquidity);
    function burn(address to) external returns (uint amount0, uint amount1);
    function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
    function skim(address to) external;
    function sync() external;

    function initialize(address, address) external;
}

//SPDX-License-Identifier: MIT
pragma solidity 0.8.19;

interface IWETH {
    function deposit() external payable;

    function withdraw(uint) external;

    function approve(address, uint) external;

    function transfer(address, uint) external;

    function transferFrom(address, address, uint) external;

    function allowance(address, address) external view returns (uint);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/Initializable.sol)

pragma solidity ^0.8.2;

import "../../utils/AddressUpgradeable.sol";

/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 *
 * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be
 * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in
 * case an upgrade adds a module that needs to be initialized.
 *
 * For example:
 *
 * [.hljs-theme-light.nopadding]
 * ```solidity
 * contract MyToken is ERC20Upgradeable {
 *     function initialize() initializer public {
 *         __ERC20_init("MyToken", "MTK");
 *     }
 * }
 *
 * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {
 *     function initializeV2() reinitializer(2) public {
 *         __ERC20Permit_init("MyToken");
 *     }
 * }
 * ```
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 *
 * [CAUTION]
 * ====
 * Avoid leaving a contract uninitialized.
 *
 * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
 * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke
 * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * /// @custom:oz-upgrades-unsafe-allow constructor
 * constructor() {
 *     _disableInitializers();
 * }
 * ```
 * ====
 */
abstract contract Initializable {
    /**
     * @dev Indicates that the contract has been initialized.
     * @custom:oz-retyped-from bool
     */
    uint8 private _initialized;

    /**
     * @dev Indicates that the contract is in the process of being initialized.
     */
    bool private _initializing;

    /**
     * @dev Triggered when the contract has been initialized or reinitialized.
     */
    event Initialized(uint8 version);

    /**
     * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,
     * `onlyInitializing` functions can be used to initialize parent contracts.
     *
     * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a
     * constructor.
     *
     * Emits an {Initialized} event.
     */
    modifier initializer() {
        bool isTopLevelCall = !_initializing;
        require(
            (isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1),
            "Initializable: contract is already initialized"
        );
        _initialized = 1;
        if (isTopLevelCall) {
            _initializing = true;
        }
        _;
        if (isTopLevelCall) {
            _initializing = false;
            emit Initialized(1);
        }
    }

    /**
     * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the
     * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be
     * used to initialize parent contracts.
     *
     * A reinitializer may be used after the original initialization step. This is essential to configure modules that
     * are added through upgrades and that require initialization.
     *
     * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`
     * cannot be nested. If one is invoked in the context of another, execution will revert.
     *
     * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in
     * a contract, executing them in the right order is up to the developer or operator.
     *
     * WARNING: setting the version to 255 will prevent any future reinitialization.
     *
     * Emits an {Initialized} event.
     */
    modifier reinitializer(uint8 version) {
        require(!_initializing && _initialized < version, "Initializable: contract is already initialized");
        _initialized = version;
        _initializing = true;
        _;
        _initializing = false;
        emit Initialized(version);
    }

    /**
     * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
     * {initializer} and {reinitializer} modifiers, directly or indirectly.
     */
    modifier onlyInitializing() {
        require(_initializing, "Initializable: contract is not initializing");
        _;
    }

    /**
     * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.
     * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized
     * to any version. It is recommended to use this to lock implementation contracts that are designed to be called
     * through proxies.
     *
     * Emits an {Initialized} event the first time it is successfully executed.
     */
    function _disableInitializers() internal virtual {
        require(!_initializing, "Initializable: contract is initializing");
        if (_initialized != type(uint8).max) {
            _initialized = type(uint8).max;
            emit Initialized(type(uint8).max);
        }
    }

    /**
     * @dev Returns the highest version that has been initialized. See {reinitializer}.
     */
    function _getInitializedVersion() internal view returns (uint8) {
        return _initialized;
    }

    /**
     * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.
     */
    function _isInitializing() internal view returns (bool) {
        return _initializing;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/math/Math.sol)

pragma solidity ^0.8.0;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    enum Rounding {
        Down, // Toward negative infinity
        Up, // Toward infinity
        Zero // Toward zero
    }

    /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a > b ? a : b;
    }

    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two numbers. The result is rounded towards
     * zero.
     */
    function average(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b) / 2 can overflow.
        return (a & b) + (a ^ b) / 2;
    }

    /**
     * @dev Returns the ceiling of the division of two numbers.
     *
     * This differs from standard division with `/` in that it rounds up instead
     * of rounding down.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b - 1) / b can overflow on addition, so we distribute.
        return a == 0 ? 0 : (a - 1) / b + 1;
    }

    /**
     * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
     * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)
     * with further edits by Uniswap Labs also under MIT license.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) {
        unchecked {
            // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
            // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
            // variables such that product = prod1 * 2^256 + prod0.
            uint256 prod0; // Least significant 256 bits of the product
            uint256 prod1; // Most significant 256 bits of the product
            assembly {
                let mm := mulmod(x, y, not(0))
                prod0 := mul(x, y)
                prod1 := sub(sub(mm, prod0), lt(mm, prod0))
            }

            // Handle non-overflow cases, 256 by 256 division.
            if (prod1 == 0) {
                // Solidity will revert if denominator == 0, unlike the div opcode on its own.
                // The surrounding unchecked block does not change this fact.
                // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.
                return prod0 / denominator;
            }

            // Make sure the result is less than 2^256. Also prevents denominator == 0.
            require(denominator > prod1, "Math: mulDiv overflow");

            ///////////////////////////////////////////////
            // 512 by 256 division.
            ///////////////////////////////////////////////

            // Make division exact by subtracting the remainder from [prod1 prod0].
            uint256 remainder;
            assembly {
                // Compute remainder using mulmod.
                remainder := mulmod(x, y, denominator)

                // Subtract 256 bit number from 512 bit number.
                prod1 := sub(prod1, gt(remainder, prod0))
                prod0 := sub(prod0, remainder)
            }

            // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.
            // See https://cs.stackexchange.com/q/138556/92363.

            // Does not overflow because the denominator cannot be zero at this stage in the function.
            uint256 twos = denominator & (~denominator + 1);
            assembly {
                // Divide denominator by twos.
                denominator := div(denominator, twos)

                // Divide [prod1 prod0] by twos.
                prod0 := div(prod0, twos)

                // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
                twos := add(div(sub(0, twos), twos), 1)
            }

            // Shift in bits from prod1 into prod0.
            prod0 |= prod1 * twos;

            // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
            // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
            // four bits. That is, denominator * inv = 1 mod 2^4.
            uint256 inverse = (3 * denominator) ^ 2;

            // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works
            // in modular arithmetic, doubling the correct bits in each step.
            inverse *= 2 - denominator * inverse; // inverse mod 2^8
            inverse *= 2 - denominator * inverse; // inverse mod 2^16
            inverse *= 2 - denominator * inverse; // inverse mod 2^32
            inverse *= 2 - denominator * inverse; // inverse mod 2^64
            inverse *= 2 - denominator * inverse; // inverse mod 2^128
            inverse *= 2 - denominator * inverse; // inverse mod 2^256

            // Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
            // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
            // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
            // is no longer required.
            result = prod0 * inverse;
            return result;
        }
    }

    /**
     * @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) {
        uint256 result = mulDiv(x, y, denominator);
        if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {
            result += 1;
        }
        return result;
    }

    /**
     * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down.
     *
     * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
     */
    function sqrt(uint256 a) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }

        // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
        //
        // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
        // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
        //
        // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
        // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
        // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
        //
        // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
        uint256 result = 1 << (log2(a) >> 1);

        // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
        // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
        // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
        // into the expected uint128 result.
        unchecked {
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            return min(result, a / result);
        }
    }

    /**
     * @notice Calculates sqrt(a), following the selected rounding direction.
     */
    function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = sqrt(a);
            return result + (rounding == Rounding.Up && result * result < a ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 2, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 128;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 64;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 32;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 16;
            }
            if (value >> 8 > 0) {
                value >>= 8;
                result += 8;
            }
            if (value >> 4 > 0) {
                value >>= 4;
                result += 4;
            }
            if (value >> 2 > 0) {
                value >>= 2;
                result += 2;
            }
            if (value >> 1 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 2, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log2(value);
            return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 10, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >= 10 ** 64) {
                value /= 10 ** 64;
                result += 64;
            }
            if (value >= 10 ** 32) {
                value /= 10 ** 32;
                result += 32;
            }
            if (value >= 10 ** 16) {
                value /= 10 ** 16;
                result += 16;
            }
            if (value >= 10 ** 8) {
                value /= 10 ** 8;
                result += 8;
            }
            if (value >= 10 ** 4) {
                value /= 10 ** 4;
                result += 4;
            }
            if (value >= 10 ** 2) {
                value /= 10 ** 2;
                result += 2;
            }
            if (value >= 10 ** 1) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log10(value);
            return result + (rounding == Rounding.Up && 10 ** result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 256, rounded down, of a positive value.
     * Returns 0 if given 0.
     *
     * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
     */
    function log256(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 16;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 8;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 4;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 2;
            }
            if (value >> 8 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 256, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log256(value);
            return result + (rounding == Rounding.Up && 1 << (result << 3) < value ? 1 : 0);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/math/Math.sol)

pragma solidity ^0.8.0;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library MathUpgradeable {
    enum Rounding {
        Down, // Toward negative infinity
        Up, // Toward infinity
        Zero // Toward zero
    }

    /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a > b ? a : b;
    }

    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two numbers. The result is rounded towards
     * zero.
     */
    function average(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b) / 2 can overflow.
        return (a & b) + (a ^ b) / 2;
    }

    /**
     * @dev Returns the ceiling of the division of two numbers.
     *
     * This differs from standard division with `/` in that it rounds up instead
     * of rounding down.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b - 1) / b can overflow on addition, so we distribute.
        return a == 0 ? 0 : (a - 1) / b + 1;
    }

    /**
     * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
     * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)
     * with further edits by Uniswap Labs also under MIT license.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) {
        unchecked {
            // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
            // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
            // variables such that product = prod1 * 2^256 + prod0.
            uint256 prod0; // Least significant 256 bits of the product
            uint256 prod1; // Most significant 256 bits of the product
            assembly {
                let mm := mulmod(x, y, not(0))
                prod0 := mul(x, y)
                prod1 := sub(sub(mm, prod0), lt(mm, prod0))
            }

            // Handle non-overflow cases, 256 by 256 division.
            if (prod1 == 0) {
                // Solidity will revert if denominator == 0, unlike the div opcode on its own.
                // The surrounding unchecked block does not change this fact.
                // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.
                return prod0 / denominator;
            }

            // Make sure the result is less than 2^256. Also prevents denominator == 0.
            require(denominator > prod1, "Math: mulDiv overflow");

            ///////////////////////////////////////////////
            // 512 by 256 division.
            ///////////////////////////////////////////////

            // Make division exact by subtracting the remainder from [prod1 prod0].
            uint256 remainder;
            assembly {
                // Compute remainder using mulmod.
                remainder := mulmod(x, y, denominator)

                // Subtract 256 bit number from 512 bit number.
                prod1 := sub(prod1, gt(remainder, prod0))
                prod0 := sub(prod0, remainder)
            }

            // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.
            // See https://cs.stackexchange.com/q/138556/92363.

            // Does not overflow because the denominator cannot be zero at this stage in the function.
            uint256 twos = denominator & (~denominator + 1);
            assembly {
                // Divide denominator by twos.
                denominator := div(denominator, twos)

                // Divide [prod1 prod0] by twos.
                prod0 := div(prod0, twos)

                // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
                twos := add(div(sub(0, twos), twos), 1)
            }

            // Shift in bits from prod1 into prod0.
            prod0 |= prod1 * twos;

            // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
            // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
            // four bits. That is, denominator * inv = 1 mod 2^4.
            uint256 inverse = (3 * denominator) ^ 2;

            // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works
            // in modular arithmetic, doubling the correct bits in each step.
            inverse *= 2 - denominator * inverse; // inverse mod 2^8
            inverse *= 2 - denominator * inverse; // inverse mod 2^16
            inverse *= 2 - denominator * inverse; // inverse mod 2^32
            inverse *= 2 - denominator * inverse; // inverse mod 2^64
            inverse *= 2 - denominator * inverse; // inverse mod 2^128
            inverse *= 2 - denominator * inverse; // inverse mod 2^256

            // Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
            // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
            // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
            // is no longer required.
            result = prod0 * inverse;
            return result;
        }
    }

    /**
     * @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) {
        uint256 result = mulDiv(x, y, denominator);
        if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {
            result += 1;
        }
        return result;
    }

    /**
     * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down.
     *
     * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
     */
    function sqrt(uint256 a) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }

        // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
        //
        // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
        // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
        //
        // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
        // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
        // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
        //
        // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
        uint256 result = 1 << (log2(a) >> 1);

        // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
        // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
        // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
        // into the expected uint128 result.
        unchecked {
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            return min(result, a / result);
        }
    }

    /**
     * @notice Calculates sqrt(a), following the selected rounding direction.
     */
    function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = sqrt(a);
            return result + (rounding == Rounding.Up && result * result < a ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 2, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 128;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 64;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 32;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 16;
            }
            if (value >> 8 > 0) {
                value >>= 8;
                result += 8;
            }
            if (value >> 4 > 0) {
                value >>= 4;
                result += 4;
            }
            if (value >> 2 > 0) {
                value >>= 2;
                result += 2;
            }
            if (value >> 1 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 2, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log2(value);
            return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 10, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >= 10 ** 64) {
                value /= 10 ** 64;
                result += 64;
            }
            if (value >= 10 ** 32) {
                value /= 10 ** 32;
                result += 32;
            }
            if (value >= 10 ** 16) {
                value /= 10 ** 16;
                result += 16;
            }
            if (value >= 10 ** 8) {
                value /= 10 ** 8;
                result += 8;
            }
            if (value >= 10 ** 4) {
                value /= 10 ** 4;
                result += 4;
            }
            if (value >= 10 ** 2) {
                value /= 10 ** 2;
                result += 2;
            }
            if (value >= 10 ** 1) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log10(value);
            return result + (rounding == Rounding.Up && 10 ** result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 256, rounded down, of a positive value.
     * Returns 0 if given 0.
     *
     * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
     */
    function log256(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 16;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 8;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 4;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 2;
            }
            if (value >> 8 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 256, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log256(value);
            return result + (rounding == Rounding.Up && 1 << (result << 3) < value ? 1 : 0);
        }
    }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.19;

import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol";
import "@openzeppelin/contracts-upgradeable/access/AccessControlUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/security/ReentrancyGuardUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/token/ERC20/utils/SafeERC20Upgradeable.sol";
import "@openzeppelin/contracts/utils/math/Math.sol";
import "../interfaces/IPrimaryLendingPlatform.sol";
import "../interfaces/IWETH.sol";
import "../interfaces/IBLendingToken.sol";
import "../interfaces/IPrimaryLendingPlatformLiquidation.sol";
import "../interfaces/IPrimaryLendingPlatformLeverage.sol";
import "../util/Asset.sol";

/**
 * @title PrimaryLendingPlatformWrappedTokenGatewayCore.
 * @notice Core contract for the Primary Lending Platform Wrapped Token Gateway Core
 * @dev Abstract contract that defines the core functionality of the primary lending platform wrapped token gateway.
 */
abstract contract PrimaryLendingPlatformWrappedTokenGatewayCore is Initializable, AccessControlUpgradeable, ReentrancyGuardUpgradeable {
    using SafeERC20Upgradeable for ERC20Upgradeable;

    bytes32 public constant MODERATOR_ROLE = keccak256("MODERATOR_ROLE");

    IPrimaryLendingPlatform public primaryLendingPlatform;
    IWETH public WETH;
    IPrimaryLendingPlatformLiquidation public pitLiquidation;

    IPrimaryLendingPlatformLeverage public pitLeverage;

    /**
     * @dev Emitted when the PrimaryLendingPlatform contract address is updated.
     * @param newPrimaryLendingPlatform The new address of the PrimaryLendingPlatform contract.
     */
    event SetPrimaryLendingPlatform(address newPrimaryLendingPlatform);

    /**
     * @dev Emitted when the PIT liquidation address is set.
     */
    event SetPITLiquidation(address newPITLiquidation);

    /**
     * @dev Emitted when the PIT (Pool Interest Token) leverage is set to a new address.
     * @param newPITLeverage The address of the new PIT leverage contract.
     */
    event SetPITLeverage(address newPITLeverage);

    /**
     * @dev Emitted when the WETH address is set.
     * @param newWETH The address of the new WETH contract.
     */
    event SetWETH(address newWETH);

    /**
     * @dev Initializes the PrimaryLendingPlatformWrappedTokenGateway contract.
     * @param pit Address of the primary index token contract.
     * @param weth Address of the wrapped Ether (WETH) token contract.
     * @param pitLiquidationAddress Address of the primary index token liquidation contract.
     * @param pitLeverageAddress Address of the primary index token leverage contract.
     */
    function initialize(address pit, address weth, address pitLiquidationAddress, address pitLeverageAddress) public initializer {
        __AccessControl_init();
        __ReentrancyGuard_init_unchained();
        _setupRole(DEFAULT_ADMIN_ROLE, msg.sender);
        _setupRole(MODERATOR_ROLE, msg.sender);
        primaryLendingPlatform = IPrimaryLendingPlatform(pit);
        WETH = IWETH(weth);
        address fWETH = primaryLendingPlatform.lendingTokenInfo(weth).bLendingToken;
        IWETH(weth).approve(fWETH, type(uint256).max);
        pitLiquidation = IPrimaryLendingPlatformLiquidation(pitLiquidationAddress);
        pitLeverage = IPrimaryLendingPlatformLeverage(pitLeverageAddress);
    }

    /**
     * @dev Modifier that allows only the moderator to execute the function.
     */
    modifier onlyModerator() {
        require(hasRole(MODERATOR_ROLE, msg.sender), "WTG: Caller is not the Moderator");
        _;
    }

    /**
     * @dev Modifier that checks if the project token is listed.
     * @param projectToken Address of the project token.
     */
    modifier isProjectTokenListed(address projectToken) {
        require(primaryLendingPlatform.projectTokenInfo(projectToken).isListed, "WTG: Project token is not listed");
        _;
    }

    /**
     * @dev Modifier that checks if the lending token is listed.
     * @param lendingToken Address of the lending token.
     */
    modifier isLendingTokenListed(address lendingToken) {
        require(primaryLendingPlatform.lendingTokenInfo(lendingToken).isListed, "WTG: Lending token is not listed");
        _;
    }

    /**
     * @dev Sets the address of the WETH contract.
     *
     * Requirements:
     * - `newWETH` cannot be the zero address.
     * - Caller must be a moderator.
     * @param _weth The address of the new WETH contract.
     */
    function setWETH(address _weth) external onlyModerator {
        require(_weth != address(0), "WTG: Invalid address");
        address fWETH = primaryLendingPlatform.lendingTokenInfo(_weth).bLendingToken;
        IWETH(_weth).approve(fWETH, type(uint256).max);
        WETH = IWETH(_weth);
        emit SetWETH(_weth);
    }

    /**
     * @dev Sets the address of the primary lending platform contract.
     *
     * Requirements:
     * - `newPit` cannot be the zero address.
     * - Caller must be a moderator.
     * @param newPit The address of the new primary lending platform contract.
     */
    function setPrimaryLendingPlatform(address newPit) external onlyModerator {
        require(newPit != address(0), "WTG: Invalid address");
        primaryLendingPlatform = IPrimaryLendingPlatform(newPit);
        emit SetPrimaryLendingPlatform(newPit);
    }

    /**
     * @dev Sets the address of the PrimaryLendingPlatformLiquidation contract for PIT liquidation.
     *
     * Requirements:
     * - `newLiquidation` cannot be the zero address.
     * - Caller must be a moderator.
     * @param newLiquidation The address of the new PrimaryLendingPlatformLiquidation contract.
     * @notice Only the moderator can call this function.
     * @notice The new address must not be the zero address.
     * @notice Emits a SetPITLiquidation event.
     */
    function setPITLiquidation(address newLiquidation) external onlyModerator {
        require(newLiquidation != address(0), "WTG: Invalid address");
        pitLiquidation = IPrimaryLendingPlatformLiquidation(newLiquidation);
        emit SetPITLiquidation(newLiquidation);
    }

    /**
     * @dev Sets the Primary Lending Platform Leverage contract address.
     *
     * Requirements:
     * - `newLeverage` cannot be the zero address.
     * - Caller must be a moderator.
     * @param newLeverage The address of the new Primary Lending Platform Leverage contract.
     */
    function setPITLeverage(address newLeverage) external onlyModerator {
        require(newLeverage != address(0), "WTG: Invalid address");
        pitLeverage = IPrimaryLendingPlatformLeverage(newLeverage);
        emit SetPITLeverage(newLeverage);
    }

    /**
     * @dev Deposits Ether into the PrimaryLendingPlatformWrappedTokenGatewayCore contract and wraps it into WETH.
     */
    function deposit() external payable nonReentrant {
        WETH.deposit{value: msg.value}();
        if (IWETH(WETH).allowance(address(this), address(primaryLendingPlatform)) < msg.value) {
            IWETH(WETH).approve(address(primaryLendingPlatform), type(uint256).max);
        }
        primaryLendingPlatform.depositFromRelatedContracts(address(WETH), msg.value, address(this), msg.sender);
    }

    /**
     * @dev Internal function to withdraw received project token amount and transfer it to the caller.
     * @param receivedProjectTokenAmount The amount of project token received.
     */
    function _withdraw(uint256 receivedProjectTokenAmount) internal {
        WETH.withdraw(receivedProjectTokenAmount);
        _safeTransferETH(msg.sender, receivedProjectTokenAmount);
    }

    /**
     * @dev Repays the specified amount of the project token's Ether outstanding debt using the lending token.
     * @param projectToken The address of the project token.
     */
    function repay(address projectToken) external payable nonReentrant {
        require(msg.value > 0, "WTG: Msg value is equal 0");
        uint256 paybackAmount = msg.value;
        WETH.deposit{value: paybackAmount}();
        uint256 amountRepaid = primaryLendingPlatform.repayFromRelatedContract(projectToken, address(WETH), paybackAmount, address(this), msg.sender);

        // refund remaining dust eth
        if (paybackAmount > amountRepaid) {
            uint256 refund = paybackAmount - amountRepaid;
            WETH.withdraw(refund);
            _safeTransferETH(msg.sender, refund);
        }
    }

    /**
     * @dev Internal function to borrow WETH from the Primary Lending Platform.
     * @param lendingTokenAmount The amount of WETH to be borrowed.
     */
    function _transferETH(uint256 lendingTokenAmount) internal {
        WETH.transferFrom(msg.sender, address(this), lendingTokenAmount);
        WETH.withdraw(lendingTokenAmount);
        _safeTransferETH(msg.sender, lendingTokenAmount);
    }

    /**
     * @dev Internal function to safely transfer ETH to the specified address.
     * @param to Recipient of the transfer.
     * @param value Amount of ETH to transfer.
     */
    function _safeTransferETH(address to, uint256 value) internal {
        (bool success, ) = to.call{value: value}(new bytes(0));
        require(success, "ETH_TRANSFER_FAILED");
    }

    /**
     * @dev Only WETH contract is allowed to transfer ETH here. Prevent other addresses to send Ether to this contract.
     */
    receive() external payable {
        require(msg.sender == address(WETH), "WTG: Receive not allowed");
    }

    /**
     * @dev Reverts any fallback calls to the contract.
     */
    fallback() external payable {
        revert("WTG: Fallback not allowed");
    }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.19;

import "../PrimaryLendingPlatformWrappedTokenGatewayCore.sol";

/**
 * @title PrimaryLendingPlatformWrappedTokenGatewayZksync.
 * @notice The PrimaryLendingPlatformWrappedTokenGatewayZksync contract is the contract that provides the functionality for lending platform system using WETH for Zksync network.
 * @dev Contract that provides the functionality for lending platform system using WETH. Inherit from PrimaryLendingPlatformWrappedTokenGatewayCore.
 */
contract PrimaryLendingPlatformWrappedTokenGatewayZksync is PrimaryLendingPlatformWrappedTokenGatewayCore {
    /**
     * @dev Allows users to withdraw their WETH tokens and receive Ether and update related token's prices.
     * @param projectTokenAmount Amount of project tokens to withdraw.
     * @param priceIds An array of price identifiers used to update the price oracle.
     * @param updateData An array of update data used to update the price oracle.
     */
    function withdraw(uint256 projectTokenAmount, bytes32[] memory priceIds, bytes[] calldata updateData) public payable nonReentrant {
        uint256 receivedProjectTokenAmount = primaryLendingPlatform.withdrawFromRelatedContracts{value: msg.value}(
            address(WETH),
            projectTokenAmount,
            msg.sender,
            address(this),
            priceIds,
            updateData
        );
        _withdraw(receivedProjectTokenAmount);
    }

    /**
     * @dev Borrows lending tokens for the caller and converts them to Ether and update related token's prices.
     * @param projectToken Address of the project token.
     * @param lendingTokenAmount Amount of lending tokens to borrow.
     * @param priceIds An array of price identifiers used to update the price oracle.
     * @param updateData An array of update data used to update the price oracle.
     */
    function borrow(
        address projectToken,
        uint256 lendingTokenAmount,
        bytes32[] memory priceIds,
        bytes[] calldata updateData
    ) public payable nonReentrant {
        uint256 borrowedAmount = primaryLendingPlatform.borrowFromRelatedContract{value: msg.value}(
            projectToken,
            address(WETH),
            lendingTokenAmount,
            msg.sender,
            priceIds,
            updateData
        );
        _transferETH(borrowedAmount);
    }

    /**
     * @dev Allows users to supply ETH to the PrimaryLendingPlatformWrappedTokenGatewayCore contract.
     * The ETH is converted to WETH and then transferred to the user's address.
     * The supplyFromRelatedContract function of the PrimaryLendingPlatform contract is called to supply the WETH to the user.
     * @param supplyAmount The amount of ETH to supply.
     * @param priceIds An array of price identifiers used to update the price oracle.
     * @param updateData An array of update data used to update the price oracle.
     * @param updateFee Update fee pays for updating price.
     */
    function supply(uint256 supplyAmount, bytes32[] memory priceIds, bytes[] calldata updateData, uint256 updateFee) external payable nonReentrant {
        uint256 actualSupplyAmount = msg.value - updateFee;
        require(supplyAmount == actualSupplyAmount, "WTG: invalid value");
        WETH.deposit{value: supplyAmount}();

        WETH.transfer(msg.sender, supplyAmount);
        primaryLendingPlatform.supplyFromRelatedContract{value: updateFee}(address(WETH), supplyAmount, msg.sender, priceIds, updateData);
    }

    /**
     * @dev Redeems the specified amount of bLendingToken for the underlying asset (WETH) and transfers it to the caller.
     * @param bLendingTokenAmount The amount of bLendingToken to redeem. If set to `type(uint256).max`, redeems all the bLendingToken balance of the caller.
     * @param priceIds An array of price identifiers used to update the price oracle.
     * @param updateData An array of update data used to update the price oracle.
     */
    function redeem(uint256 bLendingTokenAmount, bytes32[] memory priceIds, bytes[] calldata updateData) external payable nonReentrant {
        address fWETH = primaryLendingPlatform.lendingTokenInfo(address(WETH)).bLendingToken;
        uint256 userBalance = IBLendingToken(fWETH).balanceOf(msg.sender);
        uint256 amountToWithdraw = bLendingTokenAmount;
        if (bLendingTokenAmount == type(uint256).max) {
            amountToWithdraw = userBalance;
        }
        primaryLendingPlatform.redeemFromRelatedContract{value: msg.value}(address(WETH), amountToWithdraw, msg.sender, priceIds, updateData);
        uint256 exchangeRate = IBLendingToken(fWETH).exchangeRateStored();
        uint256 lendingAmountToWithdraw = (amountToWithdraw * exchangeRate) / 1e18;
        WETH.transferFrom(msg.sender, address(this), lendingAmountToWithdraw);
        WETH.withdraw(lendingAmountToWithdraw);
        _safeTransferETH(msg.sender, lendingAmountToWithdraw);
    }

    /**
     * @dev Redeems the underlying asset from the Primary Lending Platform and transfers it to the caller.
     * @param lendingTokenAmount The amount of the lending token to redeem.
     * @param priceIds An array of price identifiers used to update the price oracle.
     * @param updateData An array of update data used to update the price oracle.
     */
    function redeemUnderlying(uint256 lendingTokenAmount, bytes32[] memory priceIds, bytes[] calldata updateData) external payable nonReentrant {
        primaryLendingPlatform.redeemUnderlyingFromRelatedContract{value: msg.value}(
            address(WETH),
            lendingTokenAmount,
            msg.sender,
            priceIds,
            updateData
        );
        _transferETH(lendingTokenAmount);
    }

    /**
     * @dev Liquidates a position by providing project tokens in Ether and update related token's prices.
     * @param _account Address of the account to be liquidated.
     * @param _prjInfo Information about the project token, including its address and type.
     * @param _lendingInfo Information about the lending token, including its address and type.
     * @param _lendingTokenAmount Amount of lending tokens to liquidate.
     * @param priceIds An array of price identifiers used to update the price oracle.
     * @param updateData An array of update data used to update the price oracle.
     * @param updateFee Update fee pays for updating price.
     * @param buyCalldata The calldata for buying the lending token from the exchange aggregator. If the calldata is empty, the liquidation will execute liquidation without hot borrowing.
     */
    function liquidate(
        address _account,
        Asset.Info memory _prjInfo,
        Asset.Info memory _lendingInfo,
        uint256 _lendingTokenAmount,
        bytes32[] memory priceIds,
        bytes[] calldata updateData,
        uint256 updateFee,
        bytes[] memory buyCalldata
    ) public payable nonReentrant returns (address[] memory assets, uint256[] memory assetAmounts) {
        if (_prjInfo.addr == address(WETH) && _lendingInfo.addr == address(WETH)) {
            (assets, assetAmounts) = _liquidateWithLendingETH(_account, _prjInfo, _lendingTokenAmount, priceIds, updateData, updateFee, buyCalldata);
            uint256 receivedWETH = 0;
            for (uint256 i = 0; i < assets.length; i++) {
                if (assets[i] == address(WETH)) {
                    receivedWETH += assetAmounts[i];
                }
            }
            _transferETH(receivedWETH);
        } else if (_prjInfo.addr == address(WETH)) {
            _liquidateWithProjectETH(_account, _lendingInfo, _lendingTokenAmount, priceIds, updateData, buyCalldata);
        } else if (_lendingInfo.addr == address(WETH)) {
            _liquidateWithLendingETH(_account, _prjInfo, _lendingTokenAmount, priceIds, updateData, updateFee, buyCalldata);
        } else {
            pitLiquidation.liquidateFromModerator{value: msg.value}(
                _account,
                _prjInfo,
                _lendingInfo,
                _lendingTokenAmount,
                msg.sender,
                priceIds,
                updateData,
                buyCalldata
            );
        }
    }

    /**
     * @dev Liquidates internal a position by providing project tokens in Ether and update related token's prices.
     * @param _account Address of the account to be liquidated.
     * @param _lendingInfo Information about the lending token, including its address and type.
     * @param _lendingTokenAmount Amount of lending tokens to liquidate.
     * @param priceIds An array of price identifiers used to update the price oracle.
     * @param updateData An array of update data used to update the price oracle.
     * @param buyCalldata The calldata for buying the lending token from the exchange aggregator. If the calldata is empty, the liquidation will execute liquidation without hot borrowing.
     */
    function _liquidateWithProjectETH(
        address _account,
        Asset.Info memory _lendingInfo,
        uint256 _lendingTokenAmount,
        bytes32[] memory priceIds,
        bytes[] calldata updateData,
        bytes[] memory buyCalldata
    ) internal nonReentrant returns (address[] memory assets, uint256[] memory assetAmounts) {
        (assets, assetAmounts) = pitLiquidation.liquidateFromModerator{value: msg.value}(
            _account,
            Asset.Info({addr: address(WETH), tokenType: Asset.Type.ERC20}),
            _lendingInfo,
            _lendingTokenAmount,
            msg.sender,
            priceIds,
            updateData,
            buyCalldata
        );

        uint256 receivedWETH = 0;
        for (uint256 i = 0; i < assets.length; i++) {
            if (assets[i] == address(WETH)) {
                receivedWETH += assetAmounts[i];
            }
        }
        _transferETH(receivedWETH);
    }

    /**
     * @dev Liquidates internal a position by providing lending tokens in Ether and update related token's prices.
     * @param _account Address of the account to be liquidated.
     * @param _prjInfo Information about the project token, including its address and type.
     * @param _lendingTokenAmount Amount of lending tokens in Ether to liquidate.
     * @param priceIds An array of price identifiers used to update the price oracle.
     * @param updateData An array of update data used to update the price oracle.
     * @param updateFee Update fee pays for updating price.
     * @param buyCalldata The calldata for buying the lending token from the exchange aggregator. If the calldata is empty, the liquidation will execute liquidation without hot borrowing.
     */
    function _liquidateWithLendingETH(
        address _account,
        Asset.Info memory _prjInfo,
        uint256 _lendingTokenAmount,
        bytes32[] memory priceIds,
        bytes[] calldata updateData,
        uint256 updateFee,
        bytes[] memory buyCalldata
    ) internal nonReentrant returns (address[] memory assets, uint256[] memory assetAmounts) {
        uint256 actualLendingTokenAmount = msg.value - updateFee;
        WETH.deposit{value: actualLendingTokenAmount}();
        WETH.transfer(msg.sender, actualLendingTokenAmount);
        require(actualLendingTokenAmount == _lendingTokenAmount, "WTG: invalid value");
        (assets, assetAmounts) = pitLiquidation.liquidateFromModerator{value: updateFee}(
            _account,
            _prjInfo,
            Asset.Info({addr: address(WETH), tokenType: Asset.Type.ERC20}),
            _lendingTokenAmount,
            msg.sender,
            priceIds,
            updateData,
            buyCalldata
        );
    }

    /**
     * @dev Borrows lending tokens in a leveraged position using project tokens in Ether and update related token's prices.
     * @param _lendingInfo Information about the lending token, including its address and type.
     * @param _notionalExposure The notional exposure of the leveraged position.
     * @param _marginCollateralAmount Amount of collateral in margin.
     * @param buyCalldata Calldata for buying project tokens.
     * @param leverageType The type of leverage.
     * @param priceIds An array of price identifiers used to update the price oracle.
     * @param updateData An array of update data used to update the price oracle.
     * @param updateFee Update fee pays for updating price.
     */
    function leveragedBorrowWithProjectETH(
        Asset.Info memory _lendingInfo,
        uint _notionalExposure,
        uint _marginCollateralAmount,
        bytes[] memory buyCalldata,
        uint8 leverageType,
        bytes32[] memory priceIds,
        bytes[] calldata updateData,
        uint256 updateFee
    ) public payable nonReentrant {
        uint256 addingAmount = pitLeverage.calculateAddingAmount(msg.sender, address(WETH), _marginCollateralAmount);
        require(msg.value == addingAmount + updateFee, "WTG: invalid value");
        WETH.deposit{value: addingAmount}();
        WETH.transfer(msg.sender, addingAmount);
        pitLeverage.leveragedBorrowFromRelatedContract{value: updateFee}(
            Asset.Info({addr: address(WETH), tokenType: Asset.Type.ERC20}),
            _lendingInfo,
            _notionalExposure,
            _marginCollateralAmount,
            buyCalldata,
            msg.sender,
            leverageType,
            priceIds,
            updateData
        );
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;
import "../proxy/utils/Initializable.sol";

/**
 * @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 ReentrancyGuardUpgradeable is Initializable {
    // 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;

    function __ReentrancyGuard_init() internal onlyInitializing {
        __ReentrancyGuard_init_unchained();
    }

    function __ReentrancyGuard_init_unchained() internal onlyInitializing {
        _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 making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be _NOT_ENTERED
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

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

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

    /**
     * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
     * `nonReentrant` function in the call stack.
     */
    function _reentrancyGuardEntered() internal view returns (bool) {
        return _status == _ENTERED;
    }

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[49] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.3) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20Upgradeable.sol";
import "../extensions/IERC20PermitUpgradeable.sol";
import "../../../utils/AddressUpgradeable.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 SafeERC20Upgradeable {
    using AddressUpgradeable for address;

    /**
     * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeTransfer(IERC20Upgradeable token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    /**
     * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the
     * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.
     */
    function safeTransferFrom(IERC20Upgradeable 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(IERC20Upgradeable 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'
        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));
    }

    /**
     * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeIncreaseAllowance(IERC20Upgradeable token, address spender, uint256 value) internal {
        uint256 oldAllowance = token.allowance(address(this), spender);
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value));
    }

    /**
     * @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeDecreaseAllowance(IERC20Upgradeable token, address spender, uint256 value) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value));
        }
    }

    /**
     * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval
     * to be set to zero before setting it to a non-zero value, such as USDT.
     */
    function forceApprove(IERC20Upgradeable token, address spender, uint256 value) internal {
        bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value);

        if (!_callOptionalReturnBool(token, approvalCall)) {
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0));
            _callOptionalReturn(token, approvalCall);
        }
    }

    /**
     * @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`.
     * Revert on invalid signature.
     */
    function safePermit(
        IERC20PermitUpgradeable token,
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal {
        uint256 nonceBefore = token.nonces(owner);
        token.permit(owner, spender, value, deadline, v, r, s);
        uint256 nonceAfter = token.nonces(owner);
        require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
    }

    /**
     * @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(IERC20Upgradeable 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");
        require(returndata.length == 0 || abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
    }

    /**
     * @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).
     *
     * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.
     */
    function _callOptionalReturnBool(IERC20Upgradeable token, bytes memory data) private returns (bool) {
        // 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 cannot use {Address-functionCall} here since this should return false
        // and not revert is the subcall reverts.

        (bool success, bytes memory returndata) = address(token).call(data);
        return
            success && (returndata.length == 0 || abi.decode(returndata, (bool))) && AddressUpgradeable.isContract(address(token));
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SignedMath.sol)

pragma solidity ^0.8.0;

/**
 * @dev Standard signed math utilities missing in the Solidity language.
 */
library SignedMathUpgradeable {
    /**
     * @dev Returns the largest of two signed numbers.
     */
    function max(int256 a, int256 b) internal pure returns (int256) {
        return a > b ? a : b;
    }

    /**
     * @dev Returns the smallest of two signed numbers.
     */
    function min(int256 a, int256 b) internal pure returns (int256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two signed numbers without overflow.
     * The result is rounded towards zero.
     */
    function average(int256 a, int256 b) internal pure returns (int256) {
        // Formula from the book "Hacker's Delight"
        int256 x = (a & b) + ((a ^ b) >> 1);
        return x + (int256(uint256(x) >> 255) & (a ^ b));
    }

    /**
     * @dev Returns the absolute unsigned value of a signed value.
     */
    function abs(int256 n) internal pure returns (uint256) {
        unchecked {
            // must be unchecked in order to support `n = type(int256).min`
            return uint256(n >= 0 ? n : -n);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Strings.sol)

pragma solidity ^0.8.0;

import "./math/MathUpgradeable.sol";
import "./math/SignedMathUpgradeable.sol";

/**
 * @dev String operations.
 */
library StringsUpgradeable {
    bytes16 private constant _SYMBOLS = "0123456789abcdef";
    uint8 private constant _ADDRESS_LENGTH = 20;

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        unchecked {
            uint256 length = MathUpgradeable.log10(value) + 1;
            string memory buffer = new string(length);
            uint256 ptr;
            /// @solidity memory-safe-assembly
            assembly {
                ptr := add(buffer, add(32, length))
            }
            while (true) {
                ptr--;
                /// @solidity memory-safe-assembly
                assembly {
                    mstore8(ptr, byte(mod(value, 10), _SYMBOLS))
                }
                value /= 10;
                if (value == 0) break;
            }
            return buffer;
        }
    }

    /**
     * @dev Converts a `int256` to its ASCII `string` decimal representation.
     */
    function toString(int256 value) internal pure returns (string memory) {
        return string(abi.encodePacked(value < 0 ? "-" : "", toString(SignedMathUpgradeable.abs(value))));
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        unchecked {
            return toHexString(value, MathUpgradeable.log256(value) + 1);
        }
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
     */
    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = _SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }

    /**
     * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation.
     */
    function toHexString(address addr) internal pure returns (string memory) {
        return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);
    }

    /**
     * @dev Returns true if the two strings are equal.
     */
    function equal(string memory a, string memory b) internal pure returns (bool) {
        return keccak256(bytes(a)) == keccak256(bytes(b));
    }
}

// SPDX-License-Identifier: MIT

pragma solidity 0.8.19;

import "./IUniswapV2Pair.sol";

// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.

/**
 * @dev Wrappers over Solidity's arithmetic operations.
 *
 * NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler
 * now has built in overflow checking.
 */
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) {
        unchecked {
            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) {
        unchecked {
            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) {
        unchecked {
            // 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) {
        unchecked {
            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) {
        unchecked {
            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) {
        return a + b;
    }

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

    /**
     * @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.
     *
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        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) {
        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) {
        unchecked {
            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.
     *
     * 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) {
        unchecked {
            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) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}


library UniswapV2Library {
    using SafeMath for uint256;

    // returns sorted token addresses, used to handle return values from pairs sorted in this order
    function sortTokens(address tokenA, address tokenB)
        internal
        pure
        returns (address token0, address token1)
    {
        require(tokenA != tokenB, "UniswapV2Library: IDENTICAL_ADDRESSES");
        (token0, token1) = tokenA < tokenB
            ? (tokenA, tokenB)
            : (tokenB, tokenA);
        require(token0 != address(0), "UniswapV2Library: ZERO_ADDRESS");
    }

    // calculates the CREATE2 address for a pair without making any external calls
    function pairFor(
        address factory,
        address tokenA,
        address tokenB
    ) internal pure returns (address pair) {
        (address token0, address token1) = sortTokens(tokenA, tokenB);
        pair = address(
            uint160(
                uint256(
                    keccak256(
                        abi.encodePacked(
                            hex"ff",
                            factory,
                            keccak256(abi.encodePacked(token0, token1)),
                            hex"96e8ac4277198ff8b6f785478aa9a39f403cb768dd02cbee326c3e7da348845f" // init code hash
                        )
                    )
                )
            )
        );
    }

    // fetches and sorts the reserves for a pair
    function getReserves(
        address factory,
        address tokenA,
        address tokenB
    ) internal view returns (uint256 reserveA, uint256 reserveB) {
        (address token0, ) = sortTokens(tokenA, tokenB);
        (uint256 reserve0, uint256 reserve1, ) =
            IUniswapV2Pair(pairFor(factory, tokenA, tokenB)).getReserves();
        (reserveA, reserveB) = tokenA == token0
            ? (reserve0, reserve1)
            : (reserve1, reserve0);
    }

    // given some amount of an asset and pair reserves, returns an equivalent amount of the other asset
    function quote(
        uint256 amountA,
        uint256 reserveA,
        uint256 reserveB
    ) internal pure returns (uint256 amountB) {
        require(amountA > 0, "UniswapV2Library: INSUFFICIENT_AMOUNT");
        require(
            reserveA > 0 && reserveB > 0,
            "UniswapV2Library: INSUFFICIENT_LIQUIDITY"
        );
        amountB = amountA.mul(reserveB) / reserveA;
    }

    // given an input amount of an asset and pair reserves, returns the maximum output amount of the other asset
    function getAmountOut(
        uint256 amountIn,
        uint256 reserveIn,
        uint256 reserveOut
    ) internal pure returns (uint256 amountOut) {
        require(amountIn > 0, "UniswapV2Library: INSUFFICIENT_INPUT_AMOUNT");
        require(
            reserveIn > 0 && reserveOut > 0,
            "UniswapV2Library: INSUFFICIENT_LIQUIDITY"
        );
        uint256 amountInWithFee = amountIn.mul(997);
        uint256 numerator = amountInWithFee.mul(reserveOut);
        uint256 denominator = reserveIn.mul(1000).add(amountInWithFee);
        amountOut = numerator / denominator;
    }

    // given an output amount of an asset and pair reserves, returns a required input amount of the other asset
    function getAmountIn(
        uint256 amountOut,
        uint256 reserveIn,
        uint256 reserveOut
    ) internal pure returns (uint256 amountIn) {
        require(amountOut > 0, "UniswapV2Library: INSUFFICIENT_OUTPUT_AMOUNT");
        require(
            reserveIn > 0 && reserveOut > 0,
            "UniswapV2Library: INSUFFICIENT_LIQUIDITY"
        );
        uint256 numerator = reserveIn.mul(amountOut).mul(1000);
        uint256 denominator = reserveOut.sub(amountOut).mul(997);
        amountIn = (numerator / denominator).add(1);
    }

    // performs chained getAmountOut calculations on any number of pairs
    function getAmountsOut(
        address factory,
        uint256 amountIn,
        address[] memory path
    ) internal view returns (uint256[] memory amounts) {
        require(path.length >= 2, "UniswapV2Library: INVALID_PATH");
        amounts = new uint256[](path.length);
        amounts[0] = amountIn;
        for (uint256 i; i < path.length - 1; i++) {
            (uint256 reserveIn, uint256 reserveOut) =
                getReserves(factory, path[i], path[i + 1]);
            amounts[i + 1] = getAmountOut(amounts[i], reserveIn, reserveOut);
        }
    }

    // performs chained getAmountIn calculations on any number of pairs
    function getAmountsIn(
        address factory,
        uint256 amountOut,
        address[] memory path
    ) internal view returns (uint256[] memory amounts) {
        require(path.length >= 2, "UniswapV2Library: INVALID_PATH");
        amounts = new uint256[](path.length);
        amounts[amounts.length - 1] = amountOut;
        for (uint256 i = path.length - 1; i > 0; i--) {
            (uint256 reserveIn, uint256 reserveOut) =
                getReserves(factory, path[i - 1], path[i]);
            amounts[i - 1] = getAmountIn(amounts[i], reserveIn, reserveOut);
        }
    }
}