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

pragma solidity ^0.8.0;

import "../token/ERC20/IERC20.sol";
import "../token/ERC20/extensions/IERC20Metadata.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 IERC4626 is IERC20, IERC20Metadata {
    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
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/ERC20.sol)

pragma solidity ^0.8.0;

import "./IERC20.sol";
import "./extensions/IERC20Metadata.sol";
import "../../utils/Context.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 ERC20 is Context, IERC20, IERC20Metadata {
    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.
     */
    constructor(string memory name_, string memory symbol_) {
        _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 {}
}

// 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 v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";

/**
 * @dev Interface for the optional metadata functions from the ERC20 standard.
 *
 * _Available since v4.1._
 */
interface IERC20Metadata is IERC20 {
    /**
     * @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 v4.9.4) (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.
 *
 * ==== Security Considerations
 *
 * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature
 * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be
 * considered as an intention to spend the allowance in any specific way. The second is that because permits have
 * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should
 * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be
 * generally recommended is:
 *
 * ```solidity
 * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public {
 *     try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {}
 *     doThing(..., value);
 * }
 *
 * function doThing(..., uint256 value) public {
 *     token.safeTransferFrom(msg.sender, address(this), value);
 *     ...
 * }
 * ```
 *
 * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of
 * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also
 * {SafeERC20-safeTransferFrom}).
 *
 * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so
 * contracts should have entry points that don't rely on permit.
 */
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].
     *
     * CAUTION: See Security Considerations above.
     */
    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 v4.9.3) (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: MIT
// OpenZeppelin Contracts (last updated v4.9.4) (utils/Context.sol)

pragma solidity ^0.8.0;

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

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

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 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 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: GPL-3.0
pragma solidity >=0.8.18;

import {IERC4626} from "@openzeppelin/contracts/interfaces/IERC4626.sol";

interface IVault is IERC4626 {
    // STRATEGY EVENTS
    event StrategyChanged(address indexed strategy, uint256 change_type);
    event StrategyReported(
        address indexed strategy,
        uint256 gain,
        uint256 loss,
        uint256 current_debt,
        uint256 protocol_fees,
        uint256 total_fees,
        uint256 total_refunds
    );
    // DEBT MANAGEMENT EVENTS
    event DebtUpdated(
        address indexed strategy,
        uint256 current_debt,
        uint256 new_debt
    );
    // ROLE UPDATES
    event RoleSet(address indexed account, uint256 role);
    event UpdateFutureRoleManager(address indexed future_role_manager);
    event UpdateRoleManager(address indexed role_manager);

    event UpdateAccountant(address indexed accountant);
    event UpdateDefaultQueue(address[] new_default_queue);
    event UpdateUseDefaultQueue(bool use_default_queue);
    event UpdatedMaxDebtForStrategy(
        address indexed sender,
        address indexed strategy,
        uint256 new_debt
    );
    event UpdateAutoAllocate(bool auto_allocate);
    event UpdateDepositLimit(uint256 deposit_limit);
    event UpdateMinimumTotalIdle(uint256 minimum_total_idle);
    event UpdateProfitMaxUnlockTime(uint256 profit_max_unlock_time);
    event DebtPurchased(address indexed strategy, uint256 amount);
    event Shutdown();

    struct StrategyParams {
        uint256 activation;
        uint256 last_report;
        uint256 current_debt;
        uint256 max_debt;
    }

    function FACTORY() external view returns (uint256);

    function strategies(address) external view returns (StrategyParams memory);

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

    function use_default_queue() external view returns (bool);

    function auto_allocate() external view returns (bool);

    function minimum_total_idle() external view returns (uint256);

    function deposit_limit() external view returns (uint256);

    function deposit_limit_module() external view returns (address);

    function withdraw_limit_module() external view returns (address);

    function accountant() external view returns (address);

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

    function role_manager() external view returns (address);

    function future_role_manager() external view returns (address);

    function isShutdown() external view returns (bool);

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

    function initialize(
        address,
        string memory,
        string memory,
        address,
        uint256
    ) external;

    function setName(string memory) external;

    function setSymbol(string memory) external;

    function set_accountant(address new_accountant) external;

    function set_default_queue(address[] memory new_default_queue) external;

    function set_use_default_queue(bool) external;

    function set_auto_allocate(bool) external;

    function set_deposit_limit(uint256 deposit_limit) external;

    function set_deposit_limit(
        uint256 deposit_limit,
        bool should_override
    ) external;

    function set_deposit_limit_module(
        address new_deposit_limit_module
    ) external;

    function set_deposit_limit_module(
        address new_deposit_limit_module,
        bool should_override
    ) external;

    function set_withdraw_limit_module(
        address new_withdraw_limit_module
    ) external;

    function set_minimum_total_idle(uint256 minimum_total_idle) external;

    function setProfitMaxUnlockTime(
        uint256 new_profit_max_unlock_time
    ) external;

    function set_role(address account, uint256 role) external;

    function add_role(address account, uint256 role) external;

    function remove_role(address account, uint256 role) external;

    function transfer_role_manager(address role_manager) external;

    function accept_role_manager() external;

    function unlockedShares() external view returns (uint256);

    function pricePerShare() external view returns (uint256);

    function get_default_queue() external view returns (address[] memory);

    function process_report(
        address strategy
    ) external returns (uint256, uint256);

    function buy_debt(address strategy, uint256 amount) external;

    function add_strategy(address new_strategy) external;

    function revoke_strategy(address strategy) external;

    function force_revoke_strategy(address strategy) external;

    function update_max_debt_for_strategy(
        address strategy,
        uint256 new_max_debt
    ) external;

    function update_debt(
        address strategy,
        uint256 target_debt
    ) external returns (uint256);

    function update_debt(
        address strategy,
        uint256 target_debt,
        uint256 max_loss
    ) external returns (uint256);

    function shutdown_vault() external;

    function totalIdle() external view returns (uint256);

    function totalDebt() external view returns (uint256);

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

    function assess_share_of_unrealised_losses(
        address strategy,
        uint256 assets_needed
    ) external view returns (uint256);

    function profitMaxUnlockTime() external view returns (uint256);

    function fullProfitUnlockDate() external view returns (uint256);

    function profitUnlockingRate() external view returns (uint256);

    function lastProfitUpdate() external view returns (uint256);

    //// NON-STANDARD ERC-4626 FUNCTIONS \\\\

    function withdraw(
        uint256 assets,
        address receiver,
        address owner,
        uint256 max_loss
    ) external returns (uint256);

    function withdraw(
        uint256 assets,
        address receiver,
        address owner,
        uint256 max_loss,
        address[] memory strategies
    ) external returns (uint256);

    function redeem(
        uint256 shares,
        address receiver,
        address owner,
        uint256 max_loss
    ) external returns (uint256);

    function redeem(
        uint256 shares,
        address receiver,
        address owner,
        uint256 max_loss,
        address[] memory strategies
    ) external returns (uint256);

    function maxWithdraw(
        address owner,
        uint256 max_loss
    ) external view returns (uint256);

    function maxWithdraw(
        address owner,
        uint256 max_loss,
        address[] memory strategies
    ) external view returns (uint256);

    function maxRedeem(
        address owner,
        uint256 max_loss
    ) external view returns (uint256);

    function maxRedeem(
        address owner,
        uint256 max_loss,
        address[] memory strategies
    ) external view returns (uint256);

    //// NON-STANDARD ERC-20 FUNCTIONS \\\\

    function DOMAIN_SEPARATOR() external view returns (bytes32);

    function permit(
        address owner,
        address spender,
        uint256 amount,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external returns (bool);
}

// SPDX-License-Identifier: GPL-3.0
pragma solidity >=0.8.18;

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

interface IVaultFactory {
    event NewVault(address indexed vaultAddress, address indexed asset);
    event UpdateProtocolFeeBps(
        uint16 oldProtocolFeeBps,
        uint16 newProtocolFeeBps
    );
    event UpdateProtocolFeeRecipient(
        address oldProtocolFeeRecipient,
        address newProtocolFeeRecipient
    );
    event UpdateCustomProtocolFee(address vault, uint16 newCustomProtocolFee);
    event RemovedCustomProtocolFee(address vault);
    event FactoryShutdown();
    event UpdatePendingGovernance(address newPendingGovernance);
    event GovernanceTransferred(
        address previousGovernance,
        address newGovernance
    );

    function shutdown() external view returns (bool);

    function governance() external view returns (address);

    function pendingGovernance() external view returns (address);

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

    function use_custom_protocol_fee(address) external view returns (bool);

    function deploy_new_vault(
        address asset,
        string memory name,
        string memory symbol,
        address role_manager,
        uint256 profit_max_unlock_time
    ) external returns (address);

    function vault_original() external view returns (address);

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

    function protocol_fee_config()
        external
        view
        returns (uint16 fee_bps, address fee_recipient);

    function protocol_fee_config(
        address vault
    ) external view returns (uint16 fee_bps, address fee_recipient);

    function set_protocol_fee_bps(uint16 new_protocol_fee_bps) external;

    function set_protocol_fee_recipient(
        address new_protocol_fee_recipient
    ) external;

    function set_custom_protocol_fee_bps(
        address vault,
        uint16 new_custom_protocol_fee
    ) external;

    function remove_custom_protocol_fee(address vault) external;

    function shutdown_factory() external;

    function transferGovernance(address new_governance) external;

    function acceptGovernance() external;
}

// SPDX-License-Identifier: GPL-3.0
pragma solidity >=0.8.18;

// prettier-ignore
library Roles {
    uint256 internal constant ADD_STRATEGY_MANAGER             = 1;
    uint256 internal constant REVOKE_STRATEGY_MANAGER          = 2;
    uint256 internal constant FORCE_REVOKE_MANAGER             = 4;
    uint256 internal constant ACCOUNTANT_MANAGER               = 8;
    uint256 internal constant QUEUE_MANAGER                   = 16;
    uint256 internal constant REPORTING_MANAGER               = 32;
    uint256 internal constant DEBT_MANAGER                    = 64;
    uint256 internal constant MAX_DEBT_MANAGER               = 128;
    uint256 internal constant DEPOSIT_LIMIT_MANAGER          = 256;
    uint256 internal constant WITHDRAW_LIMIT_MANAGER         = 512;
    uint256 internal constant MINIMUM_IDLE_MANAGER          = 1024;
    uint256 internal constant PROFIT_UNLOCK_MANAGER         = 2048;
    uint256 internal constant DEBT_PURCHASER                = 4096;
    uint256 internal constant EMERGENCY_MANAGER             = 8192;
    uint256 internal constant ALL                          = 16383;
}

// SPDX-License-Identifier: AGPL-3.0
pragma solidity >=0.8.18;

// We use the Tokenized Strategy interface.
import {IStrategy} from "@tokenized-strategy/interfaces/IStrategy.sol";
import {BaseHealthCheck, ERC20} from "../HealthCheck/BaseHealthCheck.sol";

import {Math} from "@openzeppelin/contracts/utils/math/Math.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";

/**
 * @title Base4626Compounder
 * @dev Can be used to make a simple strategy that compounds
 *   rewards for any 4626 vault.
 */
contract Base4626Compounder is BaseHealthCheck {
    using SafeERC20 for ERC20;

    IStrategy public immutable vault;

    constructor(
        address _asset,
        string memory _name,
        address _vault
    ) BaseHealthCheck(_asset, _name) {
        require(IStrategy(_vault).asset() == _asset, "wrong vault");
        vault = IStrategy(_vault);

        asset.safeApprove(_vault, type(uint256).max);
    }

    /*//////////////////////////////////////////////////////////////
                NEEDED TO BE OVERRIDDEN BY STRATEGIST
    //////////////////////////////////////////////////////////////*/

    /**
     * @dev Should deploy up to '_amount' of 'asset' in the yield source.
     *
     * This function is called at the end of a {deposit} or {mint}
     * call. Meaning that unless a whitelist is implemented it will
     * be entirely permissionless and thus can be sandwiched or otherwise
     * manipulated.
     *
     * @param _amount The amount of 'asset' that the strategy should attempt
     * to deposit in the yield source.
     */
    function _deployFunds(uint256 _amount) internal virtual override {
        vault.deposit(_amount, address(this));
        _stake();
    }

    /**
     * @dev Will attempt to free the '_amount' of 'asset'.
     *
     * The amount of 'asset' that is already loose has already
     * been accounted for.
     *
     * This function is called during {withdraw} and {redeem} calls.
     * Meaning that unless a whitelist is implemented it will be
     * entirely permissionless and thus can be sandwiched or otherwise
     * manipulated.
     *
     * Should not rely on asset.balanceOf(address(this)) calls other than
     * for diff accounting purposes.
     *
     * Any difference between `_amount` and what is actually freed will be
     * counted as a loss and passed on to the withdrawer. This means
     * care should be taken in times of illiquidity. It may be better to revert
     * if withdraws are simply illiquid so not to realize incorrect losses.
     *
     * @param _amount, The amount of 'asset' to be freed.
     */
    function _freeFunds(uint256 _amount) internal virtual override {
        // Use previewWithdraw to round up.
        uint256 shares = vault.previewWithdraw(_amount);

        uint256 vaultBalance = balanceOfVault();
        if (shares > vaultBalance) {
            unchecked {
                _unStake(shares - vaultBalance);
            }
            shares = Math.min(shares, balanceOfVault());
        }

        vault.redeem(shares, address(this), address(this));
    }

    /**
     * @dev Internal function to harvest all rewards, redeploy any idle
     * funds and return an accurate accounting of all funds currently
     * held by the Strategy.
     *
     * This should do any needed harvesting, rewards selling, accrual,
     * redepositing etc. to get the most accurate view of current assets.
     *
     * NOTE: All applicable assets including loose assets should be
     * accounted for in this function.
     *
     * Care should be taken when relying on oracles or swap values rather
     * than actual amounts as all Strategy profit/loss accounting will
     * be done based on this returned value.
     *
     * This can still be called post a shutdown, a strategist can check
     * `TokenizedStrategy.isShutdown()` to decide if funds should be
     * redeployed or simply realize any profits/losses.
     *
     * @return _totalAssets A trusted and accurate account for the total
     * amount of 'asset' the strategy currently holds including idle funds.
     */
    function _harvestAndReport()
        internal
        virtual
        override
        returns (uint256 _totalAssets)
    {
        // Claim and sell any rewards.
        _claimAndSellRewards();

        // Return total balance
        _totalAssets = balanceOfAsset() + valueOfVault();
    }

    /**
     * @dev Override to stake loose vault tokens after they
     *   are deposited to the `vault`.
     */
    function _stake() internal virtual {}

    /**
     * @dev If vault tokens are staked, override to unstake them before
     *   any withdraw or redeems.
     * @param _amount The amount of vault tokens to unstake.
     */
    function _unStake(uint256 _amount) internal virtual {}

    /**
     * @dev Called during reports to do any harvesting of rewards needed.
     */
    function _claimAndSellRewards() internal virtual {}

    /**
     * @notice Return the current loose balance of this strategies `asset`.
     */
    function balanceOfAsset() public view virtual returns (uint256) {
        return asset.balanceOf(address(this));
    }

    /**
     * @notice Return the current balance of the strategies vault shares.
     */
    function balanceOfVault() public view virtual returns (uint256) {
        return vault.balanceOf(address(this));
    }

    /**
     * @notice If the vaults tokens are staked. To override and return the
     *  amount of vault tokens the strategy has staked.
     */
    function balanceOfStake() public view virtual returns (uint256) {}

    /**
     * @notice The full value denominated in `asset` of the strategies vault
     *   tokens held both in the contract and staked.
     */
    function valueOfVault() public view virtual returns (uint256) {
        return vault.convertToAssets(balanceOfVault() + balanceOfStake());
    }

    /**
     * @notice The max amount of `asset` than can be redeemed from the vault.
     * @dev If the vault tokens are staked this needs to include the
     *  vault.maxRedeem(stakingContract) to be accurate.
     *
     *  NOTE: This should use vault.convertToAssets(vault.maxRedeem(address));
     *    rather than vault.maxWithdraw(address);
     */
    function vaultsMaxWithdraw() public view virtual returns (uint256) {
        return vault.convertToAssets(vault.maxRedeem(address(this)));
    }

    /**
     * @notice Gets the max amount of `asset` that an address can deposit.
     * @dev Defaults to an unlimited amount for any address. But can
     * be overridden by strategists.
     *
     * This function will be called before any deposit or mints to enforce
     * any limits desired by the strategist. This can be used for either a
     * traditional deposit limit or for implementing a whitelist etc.
     *
     *   EX:
     *      if(isAllowed[_owner]) return super.availableDepositLimit(_owner);
     *
     * This does not need to take into account any conversion rates
     * from shares to assets. But should know that any non max uint256
     * amounts may be converted to shares. So it is recommended to keep
     * custom amounts low enough as not to cause overflow when multiplied
     * by `totalSupply`.
     *
     * @param . The address that is depositing into the strategy.
     * @return . The available amount the `_owner` can deposit in terms of `asset`
     */
    function availableDepositLimit(
        address
    ) public view virtual override returns (uint256) {
        // Return the max amount the vault will allow for deposits.
        return vault.maxDeposit(address(this));
    }

    /**
     * @notice Gets the max amount of `asset` that can be withdrawn.
     * @dev Defaults to an unlimited amount for any address. But can
     * be overridden by strategists.
     *
     * This function will be called before any withdraw or redeem to enforce
     * any limits desired by the strategist. This can be used for illiquid
     * or sandwichable strategies. It should never be lower than `totalIdle`.
     *
     *   EX:
     *       return TokenIzedStrategy.totalIdle();
     *
     * This does not need to take into account the `_owner`'s share balance
     * or conversion rates from shares to assets.
     *
     * @param . The address that is withdrawing from the strategy.
     * @return . The available amount that can be withdrawn in terms of `asset`
     */
    function availableWithdrawLimit(
        address
    ) public view virtual override returns (uint256) {
        // Return the loose balance of asset and the max we can withdraw from the vault
        return balanceOfAsset() + vaultsMaxWithdraw();
    }

    /**
     * @dev Optional function for a strategist to override that will
     * allow management to manually withdraw deployed funds from the
     * yield source if a strategy is shutdown.
     *
     * This should attempt to free `_amount`, noting that `_amount` may
     * be more than is currently deployed.
     *
     * NOTE: This will not realize any profits or losses. A separate
     * {report} will be needed in order to record any profit/loss. If
     * a report may need to be called after a shutdown it is important
     * to check if the strategy is shutdown during {_harvestAndReport}
     * so that it does not simply re-deploy all funds that had been freed.
     *
     * EX:
     *   if(freeAsset > 0 && !TokenizedStrategy.isShutdown()) {
     *       depositFunds...
     *    }
     *
     * @param _amount The amount of asset to attempt to free.
     */
    function _emergencyWithdraw(uint256 _amount) internal virtual override {
        _freeFunds(Math.min(_amount, vaultsMaxWithdraw()));
    }
}

// SPDX-License-Identifier: AGPL-3.0
pragma solidity >=0.8.18;

import {IBaseHealthCheck} from "../HealthCheck/IBaseHealthCheck.sol";

interface IBase4626Compounder is IBaseHealthCheck {
    function vault() external view returns (address);

    function balanceOfAsset() external view returns (uint256);

    function balanceOfVault() external view returns (uint256);

    function balanceOfStake() external view returns (uint256);

    function valueOfVault() external view returns (uint256);

    function vaultsMaxWithdraw() external view returns (uint256);
}

// SPDX-License-Identifier: AGPL-3.0
pragma solidity >=0.8.18;

import {BaseStrategy, ERC20} from "@tokenized-strategy/BaseStrategy.sol";

/**
 *   @title Base Health Check
 *   @author Yearn.finance
 *   @notice This contract can be inherited by any Yearn
 *   V3 strategy wishing to implement a health check during
 *   the `report` function in order to prevent any unexpected
 *   behavior from being permanently recorded as well as the
 *   `checkHealth` modifier.
 *
 *   A strategist simply needs to inherit this contract. Set
 *   the limit ratios to the desired amounts and then
 *   override `_harvestAndReport()` just as they otherwise
 *  would. If the profit or loss that would be recorded is
 *   outside the acceptable bounds the tx will revert.
 *
 *   The healthcheck does not prevent a strategy from reporting
 *   losses, but rather can make sure manual intervention is
 *   needed before reporting an unexpected loss or profit.
 */
abstract contract BaseHealthCheck is BaseStrategy {
    // Can be used to determine if a healthcheck should be called.
    // Defaults to true;
    bool public doHealthCheck = true;

    uint256 internal constant MAX_BPS = 10_000;

    // Default profit limit to 100%.
    uint16 private _profitLimitRatio = uint16(MAX_BPS);

    // Defaults loss limit to 0.
    uint16 private _lossLimitRatio;

    constructor(
        address _asset,
        string memory _name
    ) BaseStrategy(_asset, _name) {}

    /**
     * @notice Returns the current profit limit ratio.
     * @dev Use a getter function to keep the variable private.
     * @return . The current profit limit ratio.
     */
    function profitLimitRatio() public view returns (uint256) {
        return _profitLimitRatio;
    }

    /**
     * @notice Returns the current loss limit ratio.
     * @dev Use a getter function to keep the variable private.
     * @return . The current loss limit ratio.
     */
    function lossLimitRatio() public view returns (uint256) {
        return _lossLimitRatio;
    }

    /**
     * @notice Set the `profitLimitRatio`.
     * @dev Denominated in basis points. I.E. 1_000 == 10%.
     * @param _newProfitLimitRatio The mew profit limit ratio.
     */
    function setProfitLimitRatio(
        uint256 _newProfitLimitRatio
    ) external onlyManagement {
        _setProfitLimitRatio(_newProfitLimitRatio);
    }

    /**
     * @dev Internally set the profit limit ratio. Denominated
     * in basis points. I.E. 1_000 == 10%.
     * @param _newProfitLimitRatio The mew profit limit ratio.
     */
    function _setProfitLimitRatio(uint256 _newProfitLimitRatio) internal {
        require(_newProfitLimitRatio > 0, "!zero profit");
        require(_newProfitLimitRatio <= type(uint16).max, "!too high");
        _profitLimitRatio = uint16(_newProfitLimitRatio);
    }

    /**
     * @notice Set the `lossLimitRatio`.
     * @dev Denominated in basis points. I.E. 1_000 == 10%.
     * @param _newLossLimitRatio The new loss limit ratio.
     */
    function setLossLimitRatio(
        uint256 _newLossLimitRatio
    ) external onlyManagement {
        _setLossLimitRatio(_newLossLimitRatio);
    }

    /**
     * @dev Internally set the loss limit ratio. Denominated
     * in basis points. I.E. 1_000 == 10%.
     * @param _newLossLimitRatio The new loss limit ratio.
     */
    function _setLossLimitRatio(uint256 _newLossLimitRatio) internal {
        require(_newLossLimitRatio < MAX_BPS, "!loss limit");
        _lossLimitRatio = uint16(_newLossLimitRatio);
    }

    /**
     * @notice Turns the healthcheck on and off.
     * @dev If turned off the next report will auto turn it back on.
     * @param _doHealthCheck Bool if healthCheck should be done.
     */
    function setDoHealthCheck(bool _doHealthCheck) public onlyManagement {
        doHealthCheck = _doHealthCheck;
    }

    /**
     * @notice OVerrides the default {harvestAndReport} to include a healthcheck.
     * @return _totalAssets New totalAssets post report.
     */
    function harvestAndReport()
        external
        override
        onlySelf
        returns (uint256 _totalAssets)
    {
        // Let the strategy report.
        _totalAssets = _harvestAndReport();

        // Run the healthcheck on the amount returned.
        _executeHealthCheck(_totalAssets);
    }

    /**
     * @dev To be called during a report to make sure the profit
     * or loss being recorded is within the acceptable bound.
     *
     * @param _newTotalAssets The amount that will be reported.
     */
    function _executeHealthCheck(uint256 _newTotalAssets) internal virtual {
        if (!doHealthCheck) {
            doHealthCheck = true;
            return;
        }

        // Get the current total assets from the implementation.
        uint256 currentTotalAssets = TokenizedStrategy.totalAssets();

        if (_newTotalAssets > currentTotalAssets) {
            require(
                ((_newTotalAssets - currentTotalAssets) <=
                    (currentTotalAssets * uint256(_profitLimitRatio)) /
                        MAX_BPS),
                "healthCheck"
            );
        } else if (currentTotalAssets > _newTotalAssets) {
            require(
                (currentTotalAssets - _newTotalAssets <=
                    ((currentTotalAssets * uint256(_lossLimitRatio)) /
                        MAX_BPS)),
                "healthCheck"
            );
        }
    }
}

// SPDX-License-Identifier: AGPL-3.0
pragma solidity >=0.8.18;

import {IStrategy} from "@tokenized-strategy/interfaces/IStrategy.sol";

interface IBaseHealthCheck is IStrategy {
    function doHealthCheck() external view returns (bool);

    function profitLimitRatio() external view returns (uint256);

    function lossLimitRatio() external view returns (uint256);

    function setProfitLimitRatio(uint256 _newProfitLimitRatio) external;

    function setLossLimitRatio(uint256 _newLossLimitRatio) external;

    function setDoHealthCheck(bool _doHealthCheck) external;
}

// SPDX-License-Identifier: AGPL-3.0
pragma solidity >=0.8.18;

contract Governance {
    /// @notice Emitted when the governance address is updated.
    event GovernanceTransferred(
        address indexed previousGovernance,
        address indexed newGovernance
    );

    modifier onlyGovernance() {
        _checkGovernance();
        _;
    }

    /// @notice Checks if the msg sender is the governance.
    function _checkGovernance() internal view virtual {
        require(governance == msg.sender, "!governance");
    }

    /// @notice Address that can set the default base fee and provider
    address public governance;

    constructor(address _governance) {
        governance = _governance;

        emit GovernanceTransferred(address(0), _governance);
    }

    /**
     * @notice Sets a new address as the governance of the contract.
     * @dev Throws if the caller is not current governance.
     * @param _newGovernance The new governance address.
     */
    function transferGovernance(
        address _newGovernance
    ) external virtual onlyGovernance {
        require(_newGovernance != address(0), "ZERO ADDRESS");
        address oldGovernance = governance;
        governance = _newGovernance;

        emit GovernanceTransferred(oldGovernance, _newGovernance);
    }
}

// SPDX-License-Identifier: AGPL-3.0
pragma solidity >=0.8.18;

import {Governance} from "./Governance.sol";

contract Governance2Step is Governance {
    /// @notice Emitted when the pending governance address is set.
    event UpdatePendingGovernance(address indexed newPendingGovernance);

    /// @notice Address that is set to take over governance.
    address public pendingGovernance;

    constructor(address _governance) Governance(_governance) {}

    /**
     * @notice Sets a new address as the `pendingGovernance` of the contract.
     * @dev Throws if the caller is not current governance.
     * @param _newGovernance The new governance address.
     */
    function transferGovernance(
        address _newGovernance
    ) external virtual override onlyGovernance {
        require(_newGovernance != address(0), "ZERO ADDRESS");
        pendingGovernance = _newGovernance;

        emit UpdatePendingGovernance(_newGovernance);
    }

    /**
     * @notice Allows the `pendingGovernance` to accept the role.
     */
    function acceptGovernance() external virtual {
        require(msg.sender == pendingGovernance, "!pending governance");

        emit GovernanceTransferred(governance, msg.sender);

        governance = msg.sender;
        pendingGovernance = address(0);
    }
}

// SPDX-License-Identifier: AGPL-3.0
pragma solidity >=0.8.18;

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

// TokenizedStrategy interface used for internal view delegateCalls.
import {ITokenizedStrategy} from "./interfaces/ITokenizedStrategy.sol";

/**
 * @title YearnV3 Base Strategy
 * @author yearn.finance
 * @notice
 *  BaseStrategy implements all of the required functionality to
 *  seamlessly integrate with the `TokenizedStrategy` implementation contract
 *  allowing anyone to easily build a fully permissionless ERC-4626 compliant
 *  Vault by inheriting this contract and overriding three simple functions.

 *  It utilizes an immutable proxy pattern that allows the BaseStrategy
 *  to remain simple and small. All standard logic is held within the
 *  `TokenizedStrategy` and is reused over any n strategies all using the
 *  `fallback` function to delegatecall the implementation so that strategists
 *  can only be concerned with writing their strategy specific code.
 *
 *  This contract should be inherited and the three main abstract methods
 *  `_deployFunds`, `_freeFunds` and `_harvestAndReport` implemented to adapt
 *  the Strategy to the particular needs it has to generate yield. There are
 *  other optional methods that can be implemented to further customize
 *  the strategy if desired.
 *
 *  All default storage for the strategy is controlled and updated by the
 *  `TokenizedStrategy`. The implementation holds a storage struct that
 *  contains all needed global variables in a manual storage slot. This
 *  means strategists can feel free to implement their own custom storage
 *  variables as they need with no concern of collisions. All global variables
 *  can be viewed within the Strategy by a simple call using the
 *  `TokenizedStrategy` variable. IE: TokenizedStrategy.globalVariable();.
 */
abstract contract BaseStrategy {
    /*//////////////////////////////////////////////////////////////
                            MODIFIERS
    //////////////////////////////////////////////////////////////*/
    /**
     * @dev Used on TokenizedStrategy callback functions to make sure it is post
     * a delegateCall from this address to the TokenizedStrategy.
     */
    modifier onlySelf() {
        _onlySelf();
        _;
    }

    /**
     * @dev Use to assure that the call is coming from the strategies management.
     */
    modifier onlyManagement() {
        TokenizedStrategy.requireManagement(msg.sender);
        _;
    }

    /**
     * @dev Use to assure that the call is coming from either the strategies
     * management or the keeper.
     */
    modifier onlyKeepers() {
        TokenizedStrategy.requireKeeperOrManagement(msg.sender);
        _;
    }

    /**
     * @dev Use to assure that the call is coming from either the strategies
     * management or the emergency admin.
     */
    modifier onlyEmergencyAuthorized() {
        TokenizedStrategy.requireEmergencyAuthorized(msg.sender);
        _;
    }

    /**
     * @dev Require that the msg.sender is this address.
     */
    function _onlySelf() internal view {
        require(msg.sender == address(this), "!self");
    }

    /*//////////////////////////////////////////////////////////////
                            CONSTANTS
    //////////////////////////////////////////////////////////////*/

    /**
     * @dev This is the address of the TokenizedStrategy implementation
     * contract that will be used by all strategies to handle the
     * accounting, logic, storage etc.
     *
     * Any external calls to the that don't hit one of the functions
     * defined in this base or the strategy will end up being forwarded
     * through the fallback function, which will delegateCall this address.
     *
     * This address should be the same for every strategy, never be adjusted
     * and always be checked before any integration with the Strategy.
     */
    address public constant tokenizedStrategyAddress =
        0xD377919FA87120584B21279a491F82D5265A139c;

    /*//////////////////////////////////////////////////////////////
                            IMMUTABLES
    //////////////////////////////////////////////////////////////*/

    /**
     * @dev Underlying asset the Strategy is earning yield on.
     * Stored here for cheap retrievals within the strategy.
     */
    ERC20 internal immutable asset;

    /**
     * @dev This variable is set to address(this) during initialization of each strategy.
     *
     * This can be used to retrieve storage data within the strategy
     * contract as if it were a linked library.
     *
     *       i.e. uint256 totalAssets = TokenizedStrategy.totalAssets()
     *
     * Using address(this) will mean any calls using this variable will lead
     * to a call to itself. Which will hit the fallback function and
     * delegateCall that to the actual TokenizedStrategy.
     */
    ITokenizedStrategy internal immutable TokenizedStrategy;

    /**
     * @notice Used to initialize the strategy on deployment.
     *
     * This will set the `TokenizedStrategy` variable for easy
     * internal view calls to the implementation. As well as
     * initializing the default storage variables based on the
     * parameters and using the deployer for the permissioned roles.
     *
     * @param _asset Address of the underlying asset.
     * @param _name Name the strategy will use.
     */
    constructor(address _asset, string memory _name) {
        asset = ERC20(_asset);

        // Set instance of the implementation for internal use.
        TokenizedStrategy = ITokenizedStrategy(address(this));

        // Initialize the strategy's storage variables.
        _delegateCall(
            abi.encodeCall(
                ITokenizedStrategy.initialize,
                (_asset, _name, msg.sender, msg.sender, msg.sender)
            )
        );

        // Store the tokenizedStrategyAddress at the standard implementation
        // address storage slot so etherscan picks up the interface. This gets
        // stored on initialization and never updated.
        assembly {
            sstore(
                // keccak256('eip1967.proxy.implementation' - 1)
                0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc,
                tokenizedStrategyAddress
            )
        }
    }

    /*//////////////////////////////////////////////////////////////
                NEEDED TO BE OVERRIDDEN BY STRATEGIST
    //////////////////////////////////////////////////////////////*/

    /**
     * @dev Can deploy up to '_amount' of 'asset' in the yield source.
     *
     * This function is called at the end of a {deposit} or {mint}
     * call. Meaning that unless a whitelist is implemented it will
     * be entirely permissionless and thus can be sandwiched or otherwise
     * manipulated.
     *
     * @param _amount The amount of 'asset' that the strategy can attempt
     * to deposit in the yield source.
     */
    function _deployFunds(uint256 _amount) internal virtual;

    /**
     * @dev Should attempt to free the '_amount' of 'asset'.
     *
     * NOTE: The amount of 'asset' that is already loose has already
     * been accounted for.
     *
     * This function is called during {withdraw} and {redeem} calls.
     * Meaning that unless a whitelist is implemented it will be
     * entirely permissionless and thus can be sandwiched or otherwise
     * manipulated.
     *
     * Should not rely on asset.balanceOf(address(this)) calls other than
     * for diff accounting purposes.
     *
     * Any difference between `_amount` and what is actually freed will be
     * counted as a loss and passed on to the withdrawer. This means
     * care should be taken in times of illiquidity. It may be better to revert
     * if withdraws are simply illiquid so not to realize incorrect losses.
     *
     * @param _amount, The amount of 'asset' to be freed.
     */
    function _freeFunds(uint256 _amount) internal virtual;

    /**
     * @dev Internal function to harvest all rewards, redeploy any idle
     * funds and return an accurate accounting of all funds currently
     * held by the Strategy.
     *
     * This should do any needed harvesting, rewards selling, accrual,
     * redepositing etc. to get the most accurate view of current assets.
     *
     * NOTE: All applicable assets including loose assets should be
     * accounted for in this function.
     *
     * Care should be taken when relying on oracles or swap values rather
     * than actual amounts as all Strategy profit/loss accounting will
     * be done based on this returned value.
     *
     * This can still be called post a shutdown, a strategist can check
     * `TokenizedStrategy.isShutdown()` to decide if funds should be
     * redeployed or simply realize any profits/losses.
     *
     * @return _totalAssets A trusted and accurate account for the total
     * amount of 'asset' the strategy currently holds including idle funds.
     */
    function _harvestAndReport()
        internal
        virtual
        returns (uint256 _totalAssets);

    /*//////////////////////////////////////////////////////////////
                    OPTIONAL TO OVERRIDE BY STRATEGIST
    //////////////////////////////////////////////////////////////*/

    /**
     * @dev Optional function for strategist to override that can
     *  be called in between reports.
     *
     * If '_tend' is used tendTrigger() will also need to be overridden.
     *
     * This call can only be called by a permissioned role so may be
     * through protected relays.
     *
     * This can be used to harvest and compound rewards, deposit idle funds,
     * perform needed position maintenance or anything else that doesn't need
     * a full report for.
     *
     *   EX: A strategy that can not deposit funds without getting
     *       sandwiched can use the tend when a certain threshold
     *       of idle to totalAssets has been reached.
     *
     * This will have no effect on PPS of the strategy till report() is called.
     *
     * @param _totalIdle The current amount of idle funds that are available to deploy.
     */
    function _tend(uint256 _totalIdle) internal virtual {}

    /**
     * @dev Optional trigger to override if tend() will be used by the strategy.
     * This must be implemented if the strategy hopes to invoke _tend().
     *
     * @return . Should return true if tend() should be called by keeper or false if not.
     */
    function _tendTrigger() internal view virtual returns (bool) {
        return false;
    }

    /**
     * @notice Returns if tend() should be called by a keeper.
     *
     * @return . Should return true if tend() should be called by keeper or false if not.
     * @return . Calldata for the tend call.
     */
    function tendTrigger() external view virtual returns (bool, bytes memory) {
        return (
            // Return the status of the tend trigger.
            _tendTrigger(),
            // And the needed calldata either way.
            abi.encodeWithSelector(ITokenizedStrategy.tend.selector)
        );
    }

    /**
     * @notice Gets the max amount of `asset` that an address can deposit.
     * @dev Defaults to an unlimited amount for any address. But can
     * be overridden by strategists.
     *
     * This function will be called before any deposit or mints to enforce
     * any limits desired by the strategist. This can be used for either a
     * traditional deposit limit or for implementing a whitelist etc.
     *
     *   EX:
     *      if(isAllowed[_owner]) return super.availableDepositLimit(_owner);
     *
     * This does not need to take into account any conversion rates
     * from shares to assets. But should know that any non max uint256
     * amounts may be converted to shares. So it is recommended to keep
     * custom amounts low enough as not to cause overflow when multiplied
     * by `totalSupply`.
     *
     * @param . The address that is depositing into the strategy.
     * @return . The available amount the `_owner` can deposit in terms of `asset`
     */
    function availableDepositLimit(
        address /*_owner*/
    ) public view virtual returns (uint256) {
        return type(uint256).max;
    }

    /**
     * @notice Gets the max amount of `asset` that can be withdrawn.
     * @dev Defaults to an unlimited amount for any address. But can
     * be overridden by strategists.
     *
     * This function will be called before any withdraw or redeem to enforce
     * any limits desired by the strategist. This can be used for illiquid
     * or sandwichable strategies. It should never be lower than `totalIdle`.
     *
     *   EX:
     *       return TokenIzedStrategy.totalIdle();
     *
     * This does not need to take into account the `_owner`'s share balance
     * or conversion rates from shares to assets.
     *
     * @param . The address that is withdrawing from the strategy.
     * @return . The available amount that can be withdrawn in terms of `asset`
     */
    function availableWithdrawLimit(
        address /*_owner*/
    ) public view virtual returns (uint256) {
        return type(uint256).max;
    }

    /**
     * @dev Optional function for a strategist to override that will
     * allow management to manually withdraw deployed funds from the
     * yield source if a strategy is shutdown.
     *
     * This should attempt to free `_amount`, noting that `_amount` may
     * be more than is currently deployed.
     *
     * NOTE: This will not realize any profits or losses. A separate
     * {report} will be needed in order to record any profit/loss. If
     * a report may need to be called after a shutdown it is important
     * to check if the strategy is shutdown during {_harvestAndReport}
     * so that it does not simply re-deploy all funds that had been freed.
     *
     * EX:
     *   if(freeAsset > 0 && !TokenizedStrategy.isShutdown()) {
     *       depositFunds...
     *    }
     *
     * @param _amount The amount of asset to attempt to free.
     */
    function _emergencyWithdraw(uint256 _amount) internal virtual {}

    /*//////////////////////////////////////////////////////////////
                        TokenizedStrategy HOOKS
    //////////////////////////////////////////////////////////////*/

    /**
     * @notice Can deploy up to '_amount' of 'asset' in yield source.
     * @dev Callback for the TokenizedStrategy to call during a {deposit}
     * or {mint} to tell the strategy it can deploy funds.
     *
     * Since this can only be called after a {deposit} or {mint}
     * delegateCall to the TokenizedStrategy msg.sender == address(this).
     *
     * Unless a whitelist is implemented this will be entirely permissionless
     * and thus can be sandwiched or otherwise manipulated.
     *
     * @param _amount The amount of 'asset' that the strategy can
     * attempt to deposit in the yield source.
     */
    function deployFunds(uint256 _amount) external virtual onlySelf {
        _deployFunds(_amount);
    }

    /**
     * @notice Should attempt to free the '_amount' of 'asset'.
     * @dev Callback for the TokenizedStrategy to call during a withdraw
     * or redeem to free the needed funds to service the withdraw.
     *
     * This can only be called after a 'withdraw' or 'redeem' delegateCall
     * to the TokenizedStrategy so msg.sender == address(this).
     *
     * @param _amount The amount of 'asset' that the strategy should attempt to free up.
     */
    function freeFunds(uint256 _amount) external virtual onlySelf {
        _freeFunds(_amount);
    }

    /**
     * @notice Returns the accurate amount of all funds currently
     * held by the Strategy.
     * @dev Callback for the TokenizedStrategy to call during a report to
     * get an accurate accounting of assets the strategy controls.
     *
     * This can only be called after a report() delegateCall to the
     * TokenizedStrategy so msg.sender == address(this).
     *
     * @return . A trusted and accurate account for the total amount
     * of 'asset' the strategy currently holds including idle funds.
     */
    function harvestAndReport() external virtual onlySelf returns (uint256) {
        return _harvestAndReport();
    }

    /**
     * @notice Will call the internal '_tend' when a keeper tends the strategy.
     * @dev Callback for the TokenizedStrategy to initiate a _tend call in the strategy.
     *
     * This can only be called after a tend() delegateCall to the TokenizedStrategy
     * so msg.sender == address(this).
     *
     * We name the function `tendThis` so that `tend` calls are forwarded to
     * the TokenizedStrategy.

     * @param _totalIdle The amount of current idle funds that can be
     * deployed during the tend
     */
    function tendThis(uint256 _totalIdle) external virtual onlySelf {
        _tend(_totalIdle);
    }

    /**
     * @notice Will call the internal '_emergencyWithdraw' function.
     * @dev Callback for the TokenizedStrategy during an emergency withdraw.
     *
     * This can only be called after a emergencyWithdraw() delegateCall to
     * the TokenizedStrategy so msg.sender == address(this).
     *
     * We name the function `shutdownWithdraw` so that `emergencyWithdraw`
     * calls are forwarded to the TokenizedStrategy.
     *
     * @param _amount The amount of asset to attempt to free.
     */
    function shutdownWithdraw(uint256 _amount) external virtual onlySelf {
        _emergencyWithdraw(_amount);
    }

    /**
     * @dev Function used to delegate call the TokenizedStrategy with
     * certain `_calldata` and return any return values.
     *
     * This is used to setup the initial storage of the strategy, and
     * can be used by strategist to forward any other call to the
     * TokenizedStrategy implementation.
     *
     * @param _calldata The abi encoded calldata to use in delegatecall.
     * @return . The return value if the call was successful in bytes.
     */
    function _delegateCall(
        bytes memory _calldata
    ) internal returns (bytes memory) {
        // Delegate call the tokenized strategy with provided calldata.
        (bool success, bytes memory result) = tokenizedStrategyAddress
            .delegatecall(_calldata);

        // If the call reverted. Return the error.
        if (!success) {
            assembly {
                let ptr := mload(0x40)
                let size := returndatasize()
                returndatacopy(ptr, 0, size)
                revert(ptr, size)
            }
        }

        // Return the result.
        return result;
    }

    /**
     * @dev Execute a function on the TokenizedStrategy and return any value.
     *
     * This fallback function will be executed when any of the standard functions
     * defined in the TokenizedStrategy are called since they wont be defined in
     * this contract.
     *
     * It will delegatecall the TokenizedStrategy implementation with the exact
     * calldata and return any relevant values.
     *
     */
    fallback() external {
        // load our target address
        address _tokenizedStrategyAddress = tokenizedStrategyAddress;
        // Execute external function using delegatecall and return any value.
        assembly {
            // Copy function selector and any arguments.
            calldatacopy(0, 0, calldatasize())
            // Execute function delegatecall.
            let result := delegatecall(
                gas(),
                _tokenizedStrategyAddress,
                0,
                calldatasize(),
                0,
                0
            )
            // Get any return value
            returndatacopy(0, 0, returndatasize())
            // Return any return value or error back to the caller
            switch result
            case 0 {
                revert(0, returndatasize())
            }
            default {
                return(0, returndatasize())
            }
        }
    }
}

// SPDX-License-Identifier: AGPL-3.0
pragma solidity >=0.8.18;

interface IBaseStrategy {
    function tokenizedStrategyAddress() external view returns (address);

    /*//////////////////////////////////////////////////////////////
                            IMMUTABLE FUNCTIONS
    //////////////////////////////////////////////////////////////*/

    function availableDepositLimit(
        address _owner
    ) external view returns (uint256);

    function availableWithdrawLimit(
        address _owner
    ) external view returns (uint256);

    function deployFunds(uint256 _assets) external;

    function freeFunds(uint256 _amount) external;

    function harvestAndReport() external returns (uint256);

    function tendThis(uint256 _totalIdle) external;

    function shutdownWithdraw(uint256 _amount) external;

    function tendTrigger() external view returns (bool, bytes memory);
}

// SPDX-License-Identifier: AGPL-3.0
pragma solidity >=0.8.18;

import {ITokenizedStrategy} from "./ITokenizedStrategy.sol";
import {IBaseStrategy} from "./IBaseStrategy.sol";

interface IStrategy is IBaseStrategy, ITokenizedStrategy {}

// SPDX-License-Identifier: AGPL-3.0
pragma solidity >=0.8.18;

import {ERC20} from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import {IERC4626} from "@openzeppelin/contracts/interfaces/IERC4626.sol";
import {IERC20Permit} from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Permit.sol";

// Interface that implements the 4626 standard and the implementation functions
interface ITokenizedStrategy is IERC4626, IERC20Permit {
    /*//////////////////////////////////////////////////////////////
                                 EVENTS
    //////////////////////////////////////////////////////////////*/

    event StrategyShutdown();

    event NewTokenizedStrategy(
        address indexed strategy,
        address indexed asset,
        string apiVersion
    );

    event Reported(
        uint256 profit,
        uint256 loss,
        uint256 protocolFees,
        uint256 performanceFees
    );

    event UpdatePerformanceFeeRecipient(
        address indexed newPerformanceFeeRecipient
    );

    event UpdateKeeper(address indexed newKeeper);

    event UpdatePerformanceFee(uint16 newPerformanceFee);

    event UpdateManagement(address indexed newManagement);

    event UpdateEmergencyAdmin(address indexed newEmergencyAdmin);

    event UpdateProfitMaxUnlockTime(uint256 newProfitMaxUnlockTime);

    event UpdatePendingManagement(address indexed newPendingManagement);

    /*//////////////////////////////////////////////////////////////
                           INITIALIZATION
    //////////////////////////////////////////////////////////////*/

    function initialize(
        address _asset,
        string memory _name,
        address _management,
        address _performanceFeeRecipient,
        address _keeper
    ) external;

    /*//////////////////////////////////////////////////////////////
                    NON-STANDARD 4626 OPTIONS
    //////////////////////////////////////////////////////////////*/

    function withdraw(
        uint256 assets,
        address receiver,
        address owner,
        uint256 maxLoss
    ) external returns (uint256);

    function redeem(
        uint256 shares,
        address receiver,
        address owner,
        uint256 maxLoss
    ) external returns (uint256);

    function maxWithdraw(
        address owner,
        uint256 /*maxLoss*/
    ) external view returns (uint256);

    function maxRedeem(
        address owner,
        uint256 /*maxLoss*/
    ) external view returns (uint256);

    /*//////////////////////////////////////////////////////////////
                        MODIFIER HELPERS
    //////////////////////////////////////////////////////////////*/

    function requireManagement(address _sender) external view;

    function requireKeeperOrManagement(address _sender) external view;

    function requireEmergencyAuthorized(address _sender) external view;

    /*//////////////////////////////////////////////////////////////
                        KEEPERS FUNCTIONS
    //////////////////////////////////////////////////////////////*/

    function tend() external;

    function report() external returns (uint256 _profit, uint256 _loss);

    /*//////////////////////////////////////////////////////////////
                        CONSTANTS
    //////////////////////////////////////////////////////////////*/

    function MAX_FEE() external view returns (uint16);

    function FACTORY() external view returns (address);

    /*//////////////////////////////////////////////////////////////
                            GETTERS
    //////////////////////////////////////////////////////////////*/

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

    function pricePerShare() external view returns (uint256);

    function management() external view returns (address);

    function pendingManagement() external view returns (address);

    function keeper() external view returns (address);

    function emergencyAdmin() external view returns (address);

    function performanceFee() external view returns (uint16);

    function performanceFeeRecipient() external view returns (address);

    function fullProfitUnlockDate() external view returns (uint256);

    function profitUnlockingRate() external view returns (uint256);

    function profitMaxUnlockTime() external view returns (uint256);

    function lastReport() external view returns (uint256);

    function isShutdown() external view returns (bool);

    function unlockedShares() external view returns (uint256);

    /*//////////////////////////////////////////////////////////////
                            SETTERS
    //////////////////////////////////////////////////////////////*/

    function setPendingManagement(address) external;

    function acceptManagement() external;

    function setKeeper(address _keeper) external;

    function setEmergencyAdmin(address _emergencyAdmin) external;

    function setPerformanceFee(uint16 _performanceFee) external;

    function setPerformanceFeeRecipient(
        address _performanceFeeRecipient
    ) external;

    function setProfitMaxUnlockTime(uint256 _profitMaxUnlockTime) external;

    function setName(string calldata _newName) external;

    function shutdownStrategy() external;

    function emergencyWithdraw(uint256 _amount) external;
}

// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.23;

import {DepositRelayer} from "./DepositRelayer.sol";
import {IVault} from "@yearn-vaults/interfaces/IVault.sol";
import {ERC20} from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";

contract Accountant {
    using SafeERC20 for ERC20;

    modifier onlyGovernance() {
        require(msg.sender == DEPOSIT_RELAYER.governance(), "!governance");
        _;
    }

    DepositRelayer public immutable DEPOSIT_RELAYER;

    constructor(address _depositRelayer) {
        DEPOSIT_RELAYER = DepositRelayer(_depositRelayer);
    }

    function report(
        address,
        uint256 gain,
        uint256 loss
    ) public virtual returns (uint256 totalFees, uint256) {
        // Should not take on losses
        require(loss == 0, "loss too high");

        // We take a 100% fee on the gain
        totalFees = gain;
    }

    function sweep(address token) external onlyGovernance {
        ERC20(token).safeTransfer(
            msg.sender,
            ERC20(token).balanceOf(address(this))
        );
    }
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.23;

import {ERC20} from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";

import {IVault} from "@yearn-vaults/interfaces/IVault.sol";
import {Governance2Step} from "@periphery/utils/Governance2Step.sol";

import {IWETH} from "./interfaces/IWETH.sol";
import {ShareReceiver} from "./ShareReceiver.sol";
import {PreDepositFactory} from "./PreDepositFactory.sol";
import {IAccrossMessageReceiver} from "./interfaces/IAccrossMessageReceiver.sol";

contract DepositRelayer is Governance2Step, IAccrossMessageReceiver {
    using SafeERC20 for ERC20;

    event DepositProcessed(
        address indexed asset,
        address indexed user,
        uint256 indexed amount,
        uint256 originChainId,
        address referral
    );

    /// @notice Event emitted when the Across bridge is set
    event AcrossBridgeSet(address indexed acrossBridge);

    /// @notice Event emitted when the RelayLink bridge is set
    event RelayLinkBridgeSet(address indexed relayLinkBridge);

    /// @notice Event emitted when a vault is set for a specific asset
    event VaultSet(address indexed asset, address indexed vault);

    /// @notice Event emitted when a deposit cap is set for a specific asset
    event DepositCapSet(address indexed asset, uint256 indexed cap);

    modifier onlyVaultFactory() {
        require(msg.sender == PRE_DEPOSIT_FACTORY, "!vaultFactory");
        _;
    }

    /// @notice Address of the WETH token
    address public constant WETH = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;

    /// @notice Address to hold the vault shares
    address public immutable SHARE_RECEIVER;

    /// @notice Address of the factory that deployed this contract
    address public immutable PRE_DEPOSIT_FACTORY;

    /// @notice Address of the Across bridge
    address public acrossBridge;

    /// @notice Address of the RelayLink bridge
    address public relayLinkBridge;

    /// @notice Token to stb depositor strategy for any deployed vaults
    mapping(address => address) public stbDepositor;

    /// @notice Token to vault mapping for any deployed vaults
    mapping(address => address) public preDepositVault;

    /// @notice Track deposit cap for each token
    mapping(address => uint256) public depositCap;

    /// @notice Track total deposited amount for each token
    /// Track token instead of vault incase vault is updated
    mapping(address => uint256) public totalDeposited;

    /// @notice Track deposited amount for each token and user
    /// @dev Use token instead of vault incase vault is updated
    mapping(address => mapping(address => uint256)) public deposited;

    constructor(
        address _governance,
        address _acrossBridge,
        address _relayLinkBridge
    ) Governance2Step(_governance) {
        PRE_DEPOSIT_FACTORY = msg.sender;

        require(_acrossBridge != address(0), "ZERO_ADDRESS");
        acrossBridge = _acrossBridge;
        emit AcrossBridgeSet(_acrossBridge);

        require(_relayLinkBridge != address(0), "ZERO_ADDRESS");
        relayLinkBridge = _relayLinkBridge;
        emit RelayLinkBridgeSet(_relayLinkBridge);

        SHARE_RECEIVER = address(new ShareReceiver());
    }

    /// @notice function called by Across bridge when funds arrive
    function handleV3AcrossMessage(
        address token,
        uint256 amount,
        address /* relayer */,
        bytes memory message
    ) external {
        require(msg.sender == acrossBridge, "Invalid caller");
        (address user, uint256 originChainId, address referral) = abi.decode(
            message,
            (address, uint256, address)
        );

        _handleBridgeDeposit(token, amount, user, originChainId, referral);
    }

    /// @notice function called by RelayLink bridge when funds arrive
    function handleRelayLinkDeposit(
        address token,
        uint256 amount,
        address user,
        uint256 originChainId,
        address referral
    ) external {
        require(msg.sender == relayLinkBridge, "Invalid caller");
        _handleBridgeDeposit(token, amount, user, originChainId, referral);
    }

    function _handleBridgeDeposit(
        address token,
        uint256 amount,
        address user,
        uint256 originChainId,
        address referral
    ) internal {
        address vault = preDepositVault[token];
        require(vault != address(0), "Vault not set");

        // Funds should have been transferred to this contract before calling this function
        require(
            amount > 0 && ERC20(token).balanceOf(address(this)) >= amount,
            "Insufficient amount"
        );

        require(user != address(0), "Invalid user");
        require(originChainId != 0, "Invalid chain id");

        _deposit(token, vault, user, amount, originChainId, referral);
    }

    function _deposit(
        address token,
        address vault,
        address user,
        uint256 amount,
        uint256 originChainId,
        address referral
    ) internal {
        require(amount <= maxDeposit(token), "Deposit cap exceeded");

        // Approve vault to spend tokens
        ERC20(token).forceApprove(address(vault), amount);

        // Deposit into vault and send shares to recipient
        IVault(vault).deposit(amount, SHARE_RECEIVER);

        // Record deposit
        deposited[token][user] += amount;
        totalDeposited[token] += amount;

        emit DepositProcessed(token, user, amount, originChainId, referral);
    }

    /// @notice Deposit tokens into the vault
    /// @dev This is ued by those on the same chain and default to no referral
    function deposit(address token, uint256 amount) public {
        deposit(token, amount, address(0));
    }

    /// @notice Deposit tokens into the vault
    /// @dev This is ued by those on the same chain.
    function deposit(address token, uint256 amount, address referral) public {
        address vault = preDepositVault[token];
        require(vault != address(0), "Vault not set");
        require(amount > 0, "Invalid amount");

        ERC20(token).safeTransferFrom(msg.sender, address(this), amount);
        _deposit(token, vault, msg.sender, amount, block.chainid, referral);
    }

    /// @notice Deposit ETH into the vault
    /// @dev This is used by those on the same chain and default to no referral
    function depositEth() public payable {
        depositEth(address(0));
    }

    /// @notice Deposit ETH into the vault
    /// @dev This is used by those on the same chain.
    function depositEth(address referral) public payable {
        address vault = preDepositVault[WETH];
        require(vault != address(0), "Vault not set");
        uint256 amount = msg.value;
        require(amount > 0, "Invalid amount");
        IWETH(WETH).deposit{value: amount}();

        _deposit(WETH, vault, msg.sender, amount, block.chainid, referral);
    }

    /// @notice Get the max deposit amount for a specific token
    /// @param token The token address
    /// @return The max deposit amount
    function maxDeposit(address token) public view returns (uint256) {
        uint256 cap = depositCap[token];
        if (cap == type(uint256).max) {
            return cap;
        }

        uint256 totalDeposits = totalDeposited[token];
        if (totalDeposits >= cap) {
            return 0;
        }

        return cap - totalDeposits;
    }

    /// @notice Sets the deposit cap for a specific asset
    /// @dev Can only be called by the governance
    /// @param token The token address
    /// @param cap The new deposit cap
    function setDepositCap(address token, uint256 cap) external onlyGovernance {
        depositCap[token] = cap;
        emit DepositCapSet(token, cap);
    }

    /// @notice Sets the vault for a specific asset
    /// @dev Can only be called by the governance to override the vault
    /// @param asset The token address
    /// @param vault The corresponding Pre-Deposit vault address
    function setVault(address asset, address vault) external onlyGovernance {
        require(asset != address(0), "ZERO_ADDRESS");

        preDepositVault[asset] = vault;
        emit VaultSet(asset, vault);
    }

    /// @notice Sets the Across bridge
    /// @dev Set to address(0) to disable Across deposits
    /// @param _acrossBridge The new Across bridge address
    function setAcrossBridge(address _acrossBridge) external onlyGovernance {
        acrossBridge = _acrossBridge;

        emit AcrossBridgeSet(_acrossBridge);
    }

    /// @notice Sets the RelayLink bridge
    /// @dev Set to address(0) to disable RelayLink deposits
    /// @param _relayLinkBridge The new RelayLink bridge address
    function setRelayLinkBridge(
        address _relayLinkBridge
    ) external onlyGovernance {
        relayLinkBridge = _relayLinkBridge;

        emit RelayLinkBridgeSet(_relayLinkBridge);
    }

    /// @notice Notify relayer of new vault
    /// @dev Can only be called by the vault factory
    /// @param token The token address
    /// @param vault The corresponding Pre-Deposit vault address
    /// @param stbStrategy The corresponding STB depositor strategy address
    function newVault(
        address token,
        address vault,
        address stbStrategy
    ) external onlyVaultFactory {
        require(token != address(0), "ZERO_ADDRESS");

        preDepositVault[token] = vault;
        stbDepositor[token] = stbStrategy;
        depositCap[token] = type(uint256).max;
    }

    function rescue(address token) external onlyGovernance {
        ERC20(token).safeTransfer(
            msg.sender,
            ERC20(token).balanceOf(address(this))
        );
    }
}

// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.23;

import {IVaultFactory} from "@yearn-vaults/interfaces/IVaultFactory.sol";
import {IVault} from "@yearn-vaults/interfaces/IVault.sol";

import {Accountant} from "./Accountant.sol";
import {STBDepositor} from "./STBDepositor.sol";
import {DepositRelayer} from "./DepositRelayer.sol";
import {ShareReceiver} from "./ShareReceiver.sol";

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

import {Roles} from "@yearn-vaults/interfaces/Roles.sol";
import {Governance2Step} from "@periphery/utils/Governance2Step.sol";

import {IStrategyInterface} from "./interfaces/IStrategyInterface.sol";

/// @title Pre-Deposit Factory
/// @notice This contract is used to deploy new pre-deposit vaults
/// @dev Can only be called by the governance
contract PreDepositFactory {
    /// @notice Event emitted when a new pre-deposit vault is deployed
    event PreDepositDeployed(address indexed asset, address indexed vault);

    modifier onlyGovernance() {
        require(msg.sender == DEPOSIT_RELAYER.governance(), "!governance");
        _;
    }

    /// @notice Global v3.0.4 vault factory
    IVaultFactory public constant VAULT_FACTORY =
        IVaultFactory(0x770D0d1Fb036483Ed4AbB6d53c1C88fb277D812F);

    /// @notice Address to give the Role Manager position to.
    address public immutable ROLE_MANAGER;

    /// @notice The accountant that will be used to take 100% of yield
    Accountant public immutable ACCOUNTANT;

    /// @notice The network id for Katana for the LxLy bridge/
    uint32 public immutable TARGET_NETWORK_ID;

    /// @notice The relayer that will be used to deposit funds into the vaults
    DepositRelayer public immutable DEPOSIT_RELAYER;

    constructor(
        address _governance,
        address _acrossBridge,
        address _relayLinkBridge,
        uint32 _targetNetworkId,
        address _roleManager
    ) {
        DEPOSIT_RELAYER = new DepositRelayer(
            _governance,
            _acrossBridge,
            _relayLinkBridge
        );
        ACCOUNTANT = new Accountant(address(DEPOSIT_RELAYER));
        TARGET_NETWORK_ID = _targetNetworkId;
        ROLE_MANAGER = _roleManager;
    }

    /// @notice Deploy and setups a new pre-deposit vault
    /// @dev Can only be called by the governance
    /// @param _asset The asset to deploy the vault for
    /// @param _yearnVault The yearn vault to use as first strategy
    /// @param _stbVault The stb vault that will be bridged to Katana
    /// @return _vault The address of the new vault
    function deployPreDeposit(
        address _asset,
        address _yearnVault,
        address _stbVault
    ) external onlyGovernance returns (address _vault) {
        require(
            DEPOSIT_RELAYER.preDepositVault(_asset) == address(0),
            "Vault already deployed"
        );

        // Deploy new vault
        _vault = VAULT_FACTORY.deploy_new_vault(
            _asset,
            string(
                abi.encodePacked("Katana Pre-Deposit", ERC20(_asset).symbol())
            ),
            string(abi.encodePacked("kpd", ERC20(_asset).symbol())),
            address(this),
            1 days
        );

        // Deploy STBDepositor strategy
        IStrategyInterface _stbDepositor = IStrategyInterface(
            address(
                new STBDepositor(
                    _asset,
                    string(
                        abi.encodePacked(
                            "Katana ",
                            ERC20(_asset).symbol(),
                            "STB Depositor"
                        )
                    ),
                    _stbVault,
                    _vault,
                    TARGET_NETWORK_ID
                )
            )
        );

        _stbDepositor.setPendingManagement(DEPOSIT_RELAYER.governance());

        // Add strategies to vault
        IVault(_vault).set_role(address(this), Roles.ALL);

        IVault(_vault).add_strategy(address(_yearnVault));
        IVault(_vault).update_max_debt_for_strategy(
            address(_yearnVault),
            type(uint256).max
        );

        IVault(_vault).add_strategy(address(_stbDepositor));
        IVault(_vault).update_max_debt_for_strategy(
            address(_stbDepositor),
            type(uint256).max
        );

        IVault(_vault).set_accountant(address(ACCOUNTANT));
        IVault(_vault).set_deposit_limit(type(uint256).max);

        IVault(_vault).set_role(address(this), 0);
        IVault(_vault).transfer_role_manager(ROLE_MANAGER);

        // Notify relayer of new vault
        DEPOSIT_RELAYER.newVault(_asset, _vault, address(_stbDepositor));

        emit PreDepositDeployed(_asset, _vault);

        return _vault;
    }
}

// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.23;

import {Base4626Compounder, ERC20} from "@periphery/Bases/4626Compounder/Base4626Compounder.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";

import {IPolygonZkEVMBridge} from "./interfaces/IPolygonZkEVMBridge.sol";

// Do we want a timelock period to bridge the funds?
// Do we want a second signer to okay the bridging
contract STBDepositor is Base4626Compounder {
    using SafeERC20 for ERC20;

    IPolygonZkEVMBridge public constant ZKEVM_BRIDGE =
        IPolygonZkEVMBridge(0x2a3DD3EB832aF982ec71669E178424b10Dca2EDe);

    address public immutable PRE_DEPOSIT_VAULT;

    uint32 public immutable TARGET_NETWORK_ID;

    address public katanaReceiver;

    bool public bridged;

    constructor(
        address _asset,
        string memory _name,
        address _vault,
        address _preDepositVault,
        uint32 _targetNetworkId
    ) Base4626Compounder(_asset, _name, _vault) {
        PRE_DEPOSIT_VAULT = _preDepositVault;
        TARGET_NETWORK_ID = _targetNetworkId;
    }

    function bridgeFunds() external onlyManagement {
        require(katanaReceiver != address(0), "KATANA RECEIVER NOT SET");
        uint256 assetBalance = balanceOfAsset();
        if (assetBalance > 0) {
            _deployFunds(assetBalance);
        }
        uint256 shares = balanceOfVault();

        ERC20(address(vault)).forceApprove(address(ZKEVM_BRIDGE), shares);

        ZKEVM_BRIDGE.bridgeAsset(
            TARGET_NETWORK_ID,
            katanaReceiver,
            shares,
            address(vault),
            true,
            ""
        );

        if (!bridged) {
            // Return 0 withdraw limit once funds are bridged
            bridged = true;
        }
    }

    function setKatanaReceiver(
        address _katanaReceiver
    ) external onlyManagement {
        require(_katanaReceiver != address(0), "ZERO ADDRESS");
        katanaReceiver = _katanaReceiver;
    }

    function availableDepositLimit(
        address _receiver
    ) public view override returns (uint256) {
        if (_receiver == PRE_DEPOSIT_VAULT) {
            return super.availableDepositLimit(_receiver);
        }
        return 0;
    }
}

// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.23;

import {ERC20} from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";

import {DepositRelayer} from "./DepositRelayer.sol";

contract ShareReceiver {
    using SafeERC20 for ERC20;

    modifier onlyGovernance() {
        require(
            msg.sender == DepositRelayer(DEPOSIT_RELAYER).governance(),
            "!governance"
        );
        _;
    }

    address public immutable DEPOSIT_RELAYER;

    constructor() {
        DEPOSIT_RELAYER = msg.sender;
    }

    function pullShares(address token, uint256 amount) external onlyGovernance {
        ERC20(token).safeTransfer(msg.sender, amount);
    }
}

// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.23;

interface IAccrossMessageReceiver {
    function handleV3AcrossMessage(
        address tokenSent,
        uint256 amount,
        address relayer,
        bytes memory message
    ) external;
}

// SPDX-License-Identifier: AGPL-3.0
pragma solidity >=0.8.18;

interface IPolygonZkEVMBridge {
    /**
     * @dev Thrown when sender is not the PolygonZkEVM address
     */
    error OnlyPolygonZkEVM();

    /**
     * @dev Thrown when the destination network is invalid
     */
    error DestinationNetworkInvalid();

    /**
     * @dev Thrown when the amount does not match msg.value
     */
    error AmountDoesNotMatchMsgValue();

    /**
     * @dev Thrown when user is bridging tokens and is also sending a value
     */
    error MsgValueNotZero();

    /**
     * @dev Thrown when the Ether transfer on claimAsset fails
     */
    error EtherTransferFailed();

    /**
     * @dev Thrown when the message transaction on claimMessage fails
     */
    error MessageFailed();

    /**
     * @dev Thrown when the global exit root does not exist
     */
    error GlobalExitRootInvalid();

    /**
     * @dev Thrown when the smt proof does not match
     */
    error InvalidSmtProof();

    /**
     * @dev Thrown when an index is already claimed
     */
    error AlreadyClaimed();

    /**
     * @dev Thrown when the owner of permit does not match the sender
     */
    error NotValidOwner();

    /**
     * @dev Thrown when the spender of the permit does not match this contract address
     */
    error NotValidSpender();

    /**
     * @dev Thrown when the amount of the permit does not match
     */
    error NotValidAmount();

    /**
     * @dev Thrown when the permit data contains an invalid signature
     */
    error NotValidSignature();

    function bridgeAsset(
        uint32 destinationNetwork,
        address destinationAddress,
        uint256 amount,
        address token,
        bool forceUpdateGlobalExitRoot,
        bytes calldata permitData
    ) external payable;

    function bridgeMessage(
        uint32 destinationNetwork,
        address destinationAddress,
        bool forceUpdateGlobalExitRoot,
        bytes calldata metadata
    ) external payable;

    function claimAsset(
        bytes32[32] calldata smtProof,
        uint32 index,
        bytes32 mainnetExitRoot,
        bytes32 rollupExitRoot,
        uint32 originNetwork,
        address originTokenAddress,
        uint32 destinationNetwork,
        address destinationAddress,
        uint256 amount,
        bytes calldata metadata
    ) external;

    function claimMessage(
        bytes32[32] calldata smtProof,
        uint32 index,
        bytes32 mainnetExitRoot,
        bytes32 rollupExitRoot,
        uint32 originNetwork,
        address originAddress,
        uint32 destinationNetwork,
        address destinationAddress,
        uint256 amount,
        bytes calldata metadata
    ) external;

    function updateGlobalExitRoot() external;

    function activateEmergencyState() external;

    function deactivateEmergencyState() external;

    function networkID() external returns (uint32);

    function polygonRollupManager() external view returns (address);

    function depositCount() external view returns (uint256);

    function getTokenMetadata(
        address token
    ) external view returns (bytes memory);
}

// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.18;

import {IBase4626Compounder} from "@periphery/Bases/4626Compounder/IBase4626Compounder.sol";
import {IStrategy} from "@tokenized-strategy/interfaces/IStrategy.sol";

interface IStrategyInterface is IStrategy {
    function bridgeFunds() external;

    function setKatanaReceiver(address _katanaReceiver) external;

    function katanaReceiver() external view returns (address);

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

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.23;

interface IWETH {
    function deposit() external payable;
}