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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.26;

import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/security/ReentrancyGuardUpgradeable.sol";
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "./interfaces/IICHIVaultDepositGuard.sol";
import "./interfaces/IICHIVault.sol";
import "./libraries/TransferHelper.sol";
import "./StrategyStorage.sol";
import "./StrategyEvent.sol";
import "../utils/SwapDataParser.sol";

contract StrategyVaultGuard is
    Initializable,
    StrategyStorage,
    StrategyEvent,
    OwnableUpgradeable,
    ReentrancyGuardUpgradeable
{
    using SafeERC20 for IERC20;

    function initialize(
        IICHIVaultDepositGuard _ichiVaultDepositGuard,
        address _wrappedNative
    ) external initializer {
        __Ownable_init();
        __ReentrancyGuard_init();
        ichiVaultDepositGuard = _ichiVaultDepositGuard;
        WRAPPED_NATIVE = _wrappedNative;
    }

    receive() external payable {}

    modifier onlyWhitelisted(address _to) {
        require(whitelistsZeroSwap[_to], "Not whitelisted");
        _;
    }

    function deposit(
        address vault,
        address vaultDeployer,
        address token,
        uint256 amount,
        uint256 minimumProceeds
    ) external nonReentrant returns (uint256 vaultTokens) {
        require(amount > 0, "Amount must be greater than 0");
        IERC20(token).safeTransferFrom(msg.sender, address(this), amount);
        IERC20(token).safeApprove(address(ichiVaultDepositGuard), amount);
        vaultTokens = ichiVaultDepositGuard.forwardDepositToICHIVault(
            vault,
            vaultDeployer,
            token,
            amount,
            minimumProceeds,
            address(this)
        );
        IERC20(token).safeApprove(address(ichiVaultDepositGuard), 0);
        _depositStorage(vault, token, vaultTokens, amount);
    }

    function deposit(
        address vault,
        address vaultDeployer,
        uint256 minimumProceeds
    ) external payable nonReentrant returns (uint256 vaultTokens) {
        uint256 nativeAmount = msg.value;
        require(nativeAmount > 0, "Amount must be greater than 0");

        vaultTokens = ichiVaultDepositGuard.forwardNativeDepositToICHIVault{
            value: nativeAmount
        }(vault, vaultDeployer, minimumProceeds, address(this));
        _depositStorage(vault, WRAPPED_NATIVE, vaultTokens, nativeAmount);
    }

    function _depositStorage(
        address vault,
        address token,
        uint256 vaultTokens,
        uint256 amount
    ) internal {
        vaultBalances[msg.sender][vault] += vaultTokens;
        Deposit storage _deposit = _deposits[msg.sender][vault];
        _deposit.token = token;
        _deposit.lastChange = block.timestamp;

        emit StrategyDeposit(msg.sender, vault, token, amount);
    }

    function withdraw(
        address vault,
        address vaultDeployer,
        uint256 shares,
        uint256 minAmount0,
        uint256 minAmount1,
        bool isNative,
        bool isSwapIncluded,
        SwapRequest calldata swapData
    )
        external
        nonReentrant
        onlyWhitelisted(swapData.to)
        returns (uint256 amount0, uint256 amount1)
    {
        require(shares > 0, "Amount must be greater than 0");
        require(
            vaultBalances[msg.sender][vault] >= shares,
            "Insufficient balance"
        );
        require(swapData.to != address(0), "Invalid swap data");
        require(swapData.swapCallData.length >= 4, "Invalid swap data");

        require(
            IERC20(vault).approve(address(ichiVaultDepositGuard), shares),
            "Approve failed"
        );

        WithdrawData memory vars;
        if (isNative) {
            (vars.amount0, vars.amount1) = ichiVaultDepositGuard
                .forwardNativeWithdrawFromICHIVault(
                    vault,
                    vaultDeployer,
                    shares,
                    address(this),
                    minAmount0,
                    minAmount1
                );
        } else {
            (vars.amount0, vars.amount1) = ichiVaultDepositGuard
                .forwardWithdrawFromICHIVault(
                    vault,
                    vaultDeployer,
                    shares,
                    address(this),
                    minAmount0,
                    minAmount1
                );
        }
        amount0 = vars.amount0;
        amount1 = vars.amount1;

        vaultBalances[msg.sender][vault] -= shares;

        vars.isAllowToken0 = IICHIVault(vault).allowToken0();
        vars.isAllowToken1 = IICHIVault(vault).allowToken1();
        vars.token0 = IICHIVault(vault).token0();
        vars.token1 = IICHIVault(vault).token1();
        vars.sellToken = IERC20(vars.token1);
        vars.buyToken = IERC20(vars.token0);
        vars.sellAmount = vars.amount1;
        if (vars.isAllowToken1) {
            vars.sellToken = IERC20(vars.token0);
            vars.buyToken = IERC20(vars.token1);
            vars.sellAmount = vars.amount0;
        }

        if (isSwapIncluded) {
            vars.nativeAmount = 0;
            if (
                address(vars.sellToken) == WRAPPED_NATIVE && vars.isAllowToken1
            ) {
                vars.nativeAmount = vars.amount0;
            }
            if (
                address(vars.sellToken) == WRAPPED_NATIVE && vars.isAllowToken0
            ) {
                vars.nativeAmount = vars.amount1;
            }

            SwapDataParser.ExecData memory execData = SwapDataParser
                .parseExecCallData(swapData.swapCallData);

            //require(execData.operator != address(0), "Invalid operator");
            if (
                address(vars.sellToken) != WRAPPED_NATIVE &&
                execData.token != address(0)
            ) {
                require(
                    execData.token == address(vars.sellToken),
                    "Invalid token"
                );
            }

            if (vars.sellAmount > 0) {
                uint256 sellAmount = address(vars.sellToken) != WRAPPED_NATIVE
                    ? vars.sellAmount
                    : vars.nativeAmount;
                uint256 lowerBound = (execData.amount * 90) / 100;
                uint256 upperBound = (execData.amount * 110) / 100;
                require(
                    execData.amount > 0 &&
                        sellAmount >= lowerBound &&
                        sellAmount <= upperBound,
                    "Invalid amount"
                );
                if (address(vars.sellToken) != WRAPPED_NATIVE) {
                    require(vars.sellToken.approve(swapData.to, upperBound));
                }

                (bool success, bytes memory returndata) = swapData.to.call{
                    value: vars.nativeAmount
                }(swapData.swapCallData);
                if (!success) {
                    if (returndata.length > 0) {
                        assembly {
                            let returndata_size := mload(returndata)
                            revert(add(32, returndata), returndata_size)
                        }
                    } else {
                        revert("Swap failed");
                    }
                }
                if (address(vars.sellToken) != WRAPPED_NATIVE) {
                    require(vars.sellToken.approve(swapData.to, 0));
                }
            }
        }

        vars.boughtAmount = 0;
        if (vars.isAllowToken1) {
            vars.boughtAmount += vars.amount1;
        }
        if (vars.isAllowToken0) {
            vars.boughtAmount += vars.amount0;
        }

        if (address(vars.buyToken) != WRAPPED_NATIVE) {
            vars.buyToken.safeTransfer(msg.sender, vars.boughtAmount);
        } else {
            TransferHelper.safeTransferNative(msg.sender, vars.boughtAmount);
        }

        if (!isSwapIncluded) {
            if (address(vars.sellToken) != WRAPPED_NATIVE) {
                vars.sellToken.safeTransfer(msg.sender, vars.sellAmount);
            } else {
                TransferHelper.safeTransferNative(msg.sender, vars.sellAmount);
            }
        }

        Deposit storage _deposit = _deposits[msg.sender][vault];
        _deposit.lastChange = block.timestamp;

        emit StrategyWithdraw(
            msg.sender,
            vault,
            address(vars.buyToken),
            shares
        );
    }

    function getDeposit(
        address user,
        address vault
    ) external view returns (Deposit memory) {
        return _deposits[user][vault];
    }

    function getUserAmounts(
        address _user,
        address _vault
    ) external view returns (uint256 amount0, uint256 amount1) {
        return _getUserAmounts(_user, _vault);
    }

    function _getUserAmounts(
        address _user,
        address _vault
    ) private view returns (uint256 amount0, uint256 amount1) {
        uint256 userBalance = vaultBalances[_user][_vault];
        (uint256 total0, uint256 total1) = IICHIVault(_vault).getTotalAmounts();
        uint256 totalSupply = IICHIVault(_vault).totalSupply();

        if (totalSupply > 0) {
            amount0 = (userBalance * total0) / totalSupply;
            amount1 = (userBalance * total1) / totalSupply;
        }
    }

    function toWithdraw(
        address _user,
        address _vault
    ) external view returns (uint256 amount, address token) {
        (uint256 amount0, uint256 amount1) = _getUserAmounts(_user, _vault);
        address token0 = IICHIVault(_vault).token0();
        address token1 = IICHIVault(_vault).token1();
        bool isAllowToken0 = IICHIVault(_vault).allowToken0();

        amount = amount0;
        token = token0;
        if (isAllowToken0) {
            amount = amount1;
            token = token1;
        }
    }

    function withdrawAnyToken(
        address _tokenAddr,
        address _to,
        uint256 _amount
    ) external onlyOwner {
        TransferHelper.safeTransfer(_tokenAddr, _to, _amount);
    }

    function withdrawNativeToken(
        address _to,
        uint256 _amount
    ) external onlyOwner {
        TransferHelper.safeTransferNative(_to, _amount);
    }

    function updateWhitelist(
        address _address,
        bool _status
    ) external onlyOwner {
        whitelistsZeroSwap[_address] = _status;
    }

    function updateIchiVaultDepositGuard(
        IICHIVaultDepositGuard _ichiVaultDepositGuard
    ) external onlyOwner {
        ichiVaultDepositGuard = _ichiVaultDepositGuard;
    }

    function version() public pure returns (string memory) {
        return "v15";
    }
}

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

pragma solidity ^0.8.0;

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

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

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    function __Ownable_init() internal onlyInitializing {
        __Ownable_init_unchained();
    }

    function __Ownable_init_unchained() internal onlyInitializing {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

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

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

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

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

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }

    /**
     * @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) (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) (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 v4.9.0) (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
// 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 (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 IERC20Permit {
    /**
     * @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 IERC20 {
    /**
     * @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 v4.9.3) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../extensions/IERC20Permit.sol";
import "../../../utils/Address.sol";

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

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

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(IERC20 token, address spender, uint256 value) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        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(IERC20 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(IERC20 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(IERC20 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(
        IERC20Permit 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(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        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(IERC20 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))) && Address.isContract(address(token));
    }
}

// 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 Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     *
     * 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: Unlicense

pragma solidity >=0.8.4;

interface IICHIVault {
    function ichiVaultFactory() external view returns (address);

    function pool() external view returns (address);

    function token0() external view returns (address);

    function allowToken0() external view returns (bool);

    function token1() external view returns (address);

    function allowToken1() external view returns (bool);

    function fee() external view returns (uint24);

    function tickSpacing() external view returns (int24);

    function ammFeeRecipient() external view returns (address);

    function affiliate() external view returns (address);

    function baseLower() external view returns (int24);

    function baseUpper() external view returns (int24);

    function limitLower() external view returns (int24);

    function limitUpper() external view returns (int24);

    function deposit0Max() external view returns (uint256);

    function deposit1Max() external view returns (uint256);

    function hysteresis() external view returns (uint256);

    function getTotalAmounts() external view returns (uint256, uint256);

    function getBasePosition()
        external
        view
        returns (uint128, uint256, uint256);

    function getLimitPosition()
        external
        view
        returns (uint128, uint256, uint256);

    function deposit(uint256, uint256, address) external returns (uint256);

    function withdraw(uint256, address) external returns (uint256, uint256);

    function currentTick() external view returns (int24);

    function rebalance(
        int24 _baseLower,
        int24 _baseUpper,
        int24 _limitLower,
        int24 _limitUpper,
        int256 swapQuantity
    ) external;

    function collectFees() external returns (uint256 fees0, uint256 fees1);

    function setDepositMax(uint256 _deposit0Max, uint256 _deposit1Max) external;

    function setHysteresis(uint256 _hysteresis) external;

    function setAmmFeeRecipient(address _ammFeeRecipient) external;

    function setAffiliate(address _affiliate) external;

    function totalSupply() external view returns (uint256);

    event DeployICHIVault(
        address indexed sender,
        address indexed pool,
        bool allowToken0,
        bool allowToken1,
        address owner,
        uint256 twapPeriod
    );

    event SetTwapPeriod(address sender, uint32 newTwapPeriod);

    event Deposit(
        address indexed sender,
        address indexed to,
        uint256 shares,
        uint256 amount0,
        uint256 amount1
    );

    event Withdraw(
        address indexed sender,
        address indexed to,
        uint256 shares,
        uint256 amount0,
        uint256 amount1
    );

    event Rebalance(
        int24 tick,
        uint256 totalAmount0,
        uint256 totalAmount1,
        uint256 feeAmount0,
        uint256 feeAmount1,
        uint256 totalSupply
    );

    event CollectFees(
        address indexed sender,
        uint256 feeAmount0,
        uint256 feeAmount1
    );

    event Hysteresis(address indexed sender, uint256 hysteresis);

    event DepositMax(
        address indexed sender,
        uint256 deposit0Max,
        uint256 deposit1Max
    );

    event AmmFeeRecipient(address indexed sender, address ammFeeRecipient);

    event Affiliate(address indexed sender, address affiliate);
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity >=0.8.4;

interface IICHIVaultDepositGuard {

    /// @notice Emitted when the contract is deployed.
    /// @param _ICHIVaultFactory Address of the ICHIVaultFactory.
    /// @param _WETH Address of the Wrapped ETH token.
    event Deployed(address _ICHIVaultFactory, address _WETH);

    /// @notice Emitted when a deposit is forwarded to an ICHIVault.
    /// @param sender The address initiating the deposit.
    /// @param vault The ICHIVault receiving the deposit.
    /// @param token The token being deposited.
    /// @param amount The amount of the token being deposited.
    /// @param shares The amount of shares issued in the vault as a result of the deposit.
    /// @param to The address receiving the vault shares.
    event DepositForwarded(
        address indexed sender,
        address indexed vault,
        address indexed token,
        uint256 amount,
        uint256 shares,
        address to
    );

    /// @notice Retrieves the address of the ICHIVaultFactory.
    /// @return Address of the ICHIVaultFactory.
    function ICHIVaultFactory() external view returns (address);

    /// @notice Retrieves the address of the Wrapped Native Token (e.g., WETH).
    /// @return Address of the Wrapped Native Token.
    function WRAPPED_NATIVE() external view returns (address);

    /// @notice Forwards a deposit to the specified ICHIVault after input validation.
    /// @dev Emits a DepositForwarded event upon success.
    /// @param vault The address of the ICHIVault to deposit into.
    /// @param vaultDeployer The address of the vault deployer.
    /// @param token The address of the token being deposited.
    /// @param amount The amount of the token being deposited.
    /// @param minimumProceeds The minimum amount of vault tokens to be received.
    /// @param to The address to receive the vault tokens.
    /// @return vaultTokens The number of vault tokens received.
    function forwardDepositToICHIVault(
        address vault,
        address vaultDeployer,
        address token,
        uint256 amount,
        uint256 minimumProceeds,
        address to
    ) external returns (uint256 vaultTokens);

    /// @notice Forwards a native currency (e.g., ETH) deposit to an ICHIVault.
    /// @dev Converts the native currency to Wrapped Native Token before deposit.
    /// @param vault The address of the ICHIVault to deposit into.
    /// @param vaultDeployer The address of the vault deployer.
    /// @param minimumProceeds The minimum amount of vault tokens to be received.
    /// @param to The address to receive the vault tokens.
    /// @return vaultTokens The number of vault tokens received.
    function forwardNativeDepositToICHIVault(
        address vault,
        address vaultDeployer,
        uint256 minimumProceeds,
        address to
    ) external payable returns (uint256 vaultTokens);

    /// @notice Forwards a request to withdraw from an ICHIVault.
    /// @param vault The address of the ICHIVault to withdraw from.
    /// @param vaultDeployer The address of the vault deployer.
    /// @param shares The amount of shares to withdraw.
    /// @param to The address to receive the withdrawn tokens.
    /// @param minAmount0 The minimum amount of token0 expected to receive.
    /// @param minAmount1 The minimum amount of token1 expected to receive.
    /// @return amount0 The amount of token0 received.
    /// @return amount1 The amount of token1 received.
    function forwardWithdrawFromICHIVault(
        address vault,
        address vaultDeployer,
        uint256 shares,
        address to,
        uint256 minAmount0,
        uint256 minAmount1
    ) external returns (uint256 amount0, uint256 amount1);

    /// @notice Forwards a request to withdraw native currency from an ICHIVault.
    /// @dev Converts the Wrapped Native Tokens back to native currency on withdrawal.
    /// @param vault The address of the ICHIVault to withdraw from.
    /// @param vaultDeployer The address of the vault deployer.
    /// @param shares The amount of shares to withdraw.
    /// @param to The address to receive the withdrawn native currency.
    /// @param minAmount0 The minimum amount of token0 expected to receive.
    /// @param minAmount1 The minimum amount of token1 expected to receive.
    /// @return amount0 The amount of token0 received.
    /// @return amount1 The amount of token1 received.
    function forwardNativeWithdrawFromICHIVault(
        address vault,
        address vaultDeployer,
        uint256 shares,
        address to,
        uint256 minAmount0,
        uint256 minAmount1
    ) external returns (uint256 amount0, uint256 amount1);

    /// @notice Computes the unique key for a vault based on given parameters.
    /// @param vaultDeployer The address of the vault deployer.
    /// @param token0 The address of the first token in the vault.
    /// @param token1 The address of the second token in the vault.
    /// @param allowToken0 Boolean indicating if token0 is allowed in the vault.
    /// @param allowToken1 Boolean indicating if token1 is allowed in the vault.
    /// @return key The computed unique key for the vault.
    function vaultKey(
        address vaultDeployer,
        address token0,
        address token1,
        bool allowToken0,
        bool allowToken1
    ) external view returns (bytes32 key);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.26;

library TransferHelper {
    function safeTransfer(address token, address to, uint256 value) internal {
        (bool success, bytes memory data) = token.call(
            abi.encodeWithSelector(0xa9059cbb, to, value)
        );
        require(
            success && (data.length == 0 || abi.decode(data, (bool))),
            "TransferHelper: TRANSFER_FAILED"
        );
    }

    function safeTransferFrom(
        address token,
        address from,
        address to,
        uint256 value
    ) internal {
        (bool success, bytes memory data) = token.call(
            abi.encodeWithSelector(0x23b872dd, from, to, value)
        );
        require(
            success && (data.length == 0 || abi.decode(data, (bool))),
            "TransferHelper: TRANSFER_FROM_FAILED"
        );
    }

    function safeTransferNative(address to, uint256 value) internal {
        (bool success, ) = to.call{value: value}(new bytes(0));
        require(success, "TransferHelper: NATIVE_TRANSFER_FAILED");
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.26;

import "./interfaces/IICHIVaultDepositGuard.sol";

contract StrategyEvent {
    event StrategyDeposit(
        address indexed user,
        address indexed vault,
        address indexed token,
        uint256 amount
    );

    event StrategyWithdraw(
        address indexed user,
        address indexed vault,
        address receivedToken,
        uint256 vaultTokens
    );
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.26;

import "./interfaces/IICHIVaultDepositGuard.sol";
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";

contract StrategyStorage {
    IICHIVaultDepositGuard public ichiVaultDepositGuard;
    address public WRAPPED_NATIVE;

    struct Deposit {
        address token;
        uint256 amount;
        uint256 lastChange;
    }

    struct SwapRequest {
        address to;
        bytes swapCallData;
    }

    struct WithdrawData {
        uint256 amount0;
        uint256 amount1;
        bool isAllowToken0;
        bool isAllowToken1;
        address token0;
        address token1;
        IERC20 sellToken;
        IERC20 buyToken;
        uint256 boughtAmount;
        uint256 nativeAmount;
        uint256 sellAmount;
    }

    mapping(address => mapping(address => Deposit)) internal _deposits;
    mapping(address => mapping(address => uint256)) public vaultBalances;
    mapping(address => bool) public whitelistsZeroSwap;
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.26;

/**
 * @title SwapDataParser
 * @dev Library for parsing swapData.swapCallData
 * Parses exec method call: exec(address operator, address token, uint256 amount, address payable target, bytes calldata data)
 */
library SwapDataParser {
    
    // Exec method selector: 0x2213bc0b
    bytes4 constant EXEC_SELECTOR = 0x2213bc0b;
    
    // Structure for storing parsed data
    struct ExecData {
        address operator;
        address token;
        uint256 amount;
        address target;
    }
    
    /**
     * @dev Parses swapCallData and extracts exec method parameters
     * @param swapCallData - encoded exec method call data
     * @return execData - structure with parsed parameters
     */
    function parseExecCallData(bytes calldata swapCallData) 
        internal 
        pure 
        returns (ExecData memory execData) 
    {
        require(swapCallData.length >= 4, "SwapDataParser: Invalid data length");

        // Check selector
        bytes4 selector = bytes4(swapCallData[:4]);
        require(selector == EXEC_SELECTOR, "SwapDataParser: Invalid selector");

        assembly {
            // Skip selector (4 bytes)
            let dataPtr := add(swapCallData.offset, 4)

            // Read operator (address - 32 bytes)
            mstore(add(execData, 0), shr(0, calldataload(dataPtr)))
            dataPtr := add(dataPtr, 32)

            // Read token (address - 32 bytes)
            mstore(add(execData, 32), shr(0, calldataload(dataPtr)))
            dataPtr := add(dataPtr, 32)

            // Read amount (uint256 - 32 bytes)
            mstore(add(execData, 64), calldataload(dataPtr))
            dataPtr := add(dataPtr, 32)

            // Read target (address - 32 bytes)
            mstore(add(execData, 96), shr(0, calldataload(dataPtr)))
            dataPtr := add(dataPtr, 32)
        }
    }
    
    /**
     * @dev Checks if swapCallData contains exec method call
     * @param swapCallData - encoded call data
     * @return bool - true if it's an exec method call
     */
    function isExecCall(bytes calldata swapCallData) internal pure returns (bool) {
        if (swapCallData.length < 4) return false;
        return bytes4(swapCallData[:4]) == EXEC_SELECTOR;
    }
    
    /**
     * @dev Extracts only operator from swapCallData
     * @param swapCallData - encoded call data
     * @return operator - operator address
     */
    function getOperator(bytes calldata swapCallData) internal pure returns (address operator) {
        require(isExecCall(swapCallData), "SwapDataParser: Not an exec call");
        
        assembly {
            // Skip selector and read operator
            operator := shr(96, calldataload(add(swapCallData.offset, 4)))
        }
    }
    
    /**
     * @dev Extracts only token from swapCallData
     * @param swapCallData - encoded call data
     * @return token - token address
     */
    function getToken(bytes calldata swapCallData) internal pure returns (address token) {
        require(isExecCall(swapCallData), "SwapDataParser: Not an exec call");
        
        assembly {
            // Skip selector + operator and read token
            token := shr(96, calldataload(add(swapCallData.offset, 36)))
        }
    }
    
    /**
     * @dev Extracts only amount from swapCallData
     * @param swapCallData - encoded call data
     * @return amount - token amount
     */
    function getAmount(bytes calldata swapCallData) internal pure returns (uint256 amount) {
        require(isExecCall(swapCallData), "SwapDataParser: Not an exec call");
        
        assembly {
            // Skip selector + operator + token and read amount
            amount := calldataload(add(swapCallData.offset, 68))
        }
    }
    
    /**
     * @dev Extracts only target from swapCallData
     * @param swapCallData - encoded call data
     * @return target - target address
     */
    function getTarget(bytes calldata swapCallData) internal pure returns (address target) {
        require(isExecCall(swapCallData), "SwapDataParser: Not an exec call");
        
        assembly {
            // Skip selector + operator + token + amount and read target
            target := shr(96, calldataload(add(swapCallData.offset, 100)))
        }
    }
    
    /**
     * @dev Extracts only data from swapCallData
     * @param swapCallData - encoded call data
     * @return data - additional data
     */
    function getData(bytes calldata swapCallData) internal pure returns (bytes memory data) {
        require(isExecCall(swapCallData), "SwapDataParser: Not an exec call");
        
        assembly {
            // Skip selector + operator + token + amount + target and read data offset
            let dataOffset := calldataload(add(swapCallData.offset, 132))
            let dataPtr := add(swapCallData.offset, dataOffset)
            
            // Read data length
            let dataLength := calldataload(dataPtr)
            dataPtr := add(dataPtr, 32)
            
            // Copy data to memory
            data := mload(0x40)
            mstore(data, dataLength)
            calldatacopy(add(data, 32), dataPtr, dataLength)
            mstore(0x40, add(add(data, 32), add(dataLength, 31)))
        }
    }
    
    /**
     * @dev Validates SwapRequest structure
     * @param to - contract address to call
     * @param swapCallData - encoded call data
     * @return bool - true if valid
     */
    function validateSwapRequest(address to, bytes calldata swapCallData) internal pure returns (bool) {
        if (to == address(0)) return false;
        if (swapCallData.length < 4) return false;
        if (!isExecCall(swapCallData)) return false;
        return true;
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "evmVersion": "paris",
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

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StrategyStorage.Deposit","name":"","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_user","type":"address"},{"internalType":"address","name":"_vault","type":"address"}],"name":"getUserAmounts","outputs":[{"internalType":"uint256","name":"amount0","type":"uint256"},{"internalType":"uint256","name":"amount1","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"ichiVaultDepositGuard","outputs":[{"internalType":"contract IICHIVaultDepositGuard","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"contract IICHIVaultDepositGuard","name":"_ichiVaultDepositGuard","type":"address"},{"internalType":"address","name":"_wrappedNative","type":"address"}],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_user","type":"address"},{"internalType":"address","name":"_vault","type":"address"}],"name":"toWithdraw","outputs":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address","name":"token","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract IICHIVaultDepositGuard","name":"_ichiVaultDepositGuard","type":"address"}],"name":"updateIchiVaultDepositGuard","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_address","type":"address"},{"internalType":"bool","name":"_status","type":"bool"}],"name":"updateWhitelist","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"vaultBalances","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"version","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"whitelistsZeroSwap","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"vault","type":"address"},{"internalType":"address","name":"vaultDeployer","type":"address"},{"internalType":"uint256","name":"shares","type":"uint256"},{"internalType":"uint256","name":"minAmount0","type":"uint256"},{"internalType":"uint256","name":"minAmount1","type":"uint256"},{"internalType":"bool","name":"isNative","type":"bool"},{"internalType":"bool","name":"isSwapIncluded","type":"bool"},{"components":[{"internalType":"address","name":"to","type":"address"},{"internalType":"bytes","name":"swapCallData","type":"bytes"}],"internalType":"struct StrategyStorage.SwapRequest","name":"swapData","type":"tuple"}],"name":"withdraw","outputs":[{"internalType":"uint256","name":"amount0","type":"uint256"},{"internalType":"uint256","name":"amount1","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_tokenAddr","type":"address"},{"internalType":"address","name":"_to","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"withdrawAnyToken","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_to","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"withdrawNativeToken","outputs":[],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]

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