// File: lib/communal/Address.sol



// SPDX-License-Identifier: MIT
pragma solidity >=0.6.11 <0.9.0;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        // solhint-disable-next-line no-inline-assembly
        assembly { size := extcodesize(account) }
        return size > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (bool success, ) = recipient.call{ value: amount }("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain`call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
      return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.call{ value: value }(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.staticcall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}
// File: lib/communal/Context.sol



// SPDX-License-Identifier: MIT
pragma solidity >=0.6.11;

/*
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with GSN meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address payable) {
        return payable(msg.sender);
    }

    function _msgData() internal view virtual returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}
// File: lib/communal/IERC20.sol



// SPDX-License-Identifier: MIT
pragma solidity >=0.6.11;

import "./Context.sol";
import "./SafeMath.sol";

/**
 * @dev Interface of the ERC20 standard as defined in the EIP. Does not include
 * the optional functions; to access them see {ERC20Detailed}.
 */
interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `sender` to `recipient` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);
}


// File: lib/communal/ReentrancyGuard.sol



// SPDX-License-Identifier: MIT
pragma solidity >=0.6.11;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    constructor () internal {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and make it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        // On the first call to nonReentrant, _notEntered will be true
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;

        _;

        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }
}
// File: lib/communal/SafeERC20.sol



// SPDX-License-Identifier: MIT
pragma solidity >=0.6.11;

import "./IERC20.sol";
import "./SafeMath.sol";
import "./Address.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using SafeMath for uint256;
    using Address for address;

    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(IERC20 token, address spender, uint256 value) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        // solhint-disable-next-line max-line-length
        require((value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 newAllowance = token.allowance(address(this), spender).add(value);
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        if (returndata.length > 0) { // Return data is optional
            // solhint-disable-next-line max-line-length
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}
// File: lib/communal/SafeMath.sol



// SPDX-License-Identifier: MIT
pragma solidity >=0.6.11;

/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     * - Subtraction cannot overflow.
     *
     * _Available since v2.4.0._
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;

        return c;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) {
            return 0;
        }

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     *
     * _Available since v2.4.0._
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        // Solidity only automatically asserts when dividing by 0
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "SafeMath: modulo by zero");
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts with custom message when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     *
     * _Available since v2.4.0._
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}
// File: lib/communal/TransferHelper.sol



// SPDX-License-Identifier: MIT
pragma solidity >=0.6.11;

// helper methods for interacting with ERC20 tokens and sending ETH that do not consistently return true/false
library TransferHelper {
    function safeApprove(address token, address to, uint value) internal {
        // bytes4(keccak256(bytes('approve(address,uint256)')));
        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value));
        require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: APPROVE_FAILED');
    }

    function safeTransfer(address token, address to, uint value) internal {
        // bytes4(keccak256(bytes('transfer(address,uint256)')));
        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value));
        require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: TRANSFER_FAILED');
    }

    function safeTransferFrom(address token, address from, address to, uint value) internal {
        // bytes4(keccak256(bytes('transferFrom(address,address,uint256)')));
        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value));
        require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: TRANSFER_FROM_FAILED');
    }

    function safeTransferETH(address to, uint value) internal {
        (bool success,) = to.call{value:value}(new bytes(0));
        require(success, 'TransferHelper: ETH_TRANSFER_FAILED');
    }
}
// File: src/interfaces/ISwapRouter.sol



// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.7.5;


/// @title Router token swapping functionality
/// @notice Functions for swapping tokens via Uniswap V3
interface ISwapRouter {
    struct ExactInputSingleParams {
        address tokenIn;
        address tokenOut;
        uint24 fee;
        address recipient;
        uint256 deadline;
        uint256 amountIn;
        uint256 amountOutMinimum;
        uint160 sqrtPriceLimitX96;
    }

    /// @notice Swaps `amountIn` of one token for as much as possible of another token
    /// @param params The parameters necessary for the swap, encoded as `ExactInputSingleParams` in calldata
    /// @return amountOut The amount of the received token
    function exactInputSingle(ExactInputSingleParams calldata params) external payable returns (uint256 amountOut);

    struct ExactInputParams {
        bytes path;
        address recipient;
        uint256 deadline;
        uint256 amountIn;
        uint256 amountOutMinimum;
    }

    /// @notice Swaps `amountIn` of one token for as much as possible of another along the specified path
    /// @param params The parameters necessary for the multi-hop swap, encoded as `ExactInputParams` in calldata
    /// @return amountOut The amount of the received token
    function exactInput(ExactInputParams calldata params) external payable returns (uint256 amountOut);

    struct ExactOutputSingleParams {
        address tokenIn;
        address tokenOut;
        uint24 fee;
        address recipient;
        uint256 deadline;
        uint256 amountOut;
        uint256 amountInMaximum;
        uint160 sqrtPriceLimitX96;
    }

    /// @notice Swaps as little as possible of one token for `amountOut` of another token
    /// @param params The parameters necessary for the swap, encoded as `ExactOutputSingleParams` in calldata
    /// @return amountIn The amount of the input token
    function exactOutputSingle(ExactOutputSingleParams calldata params) external payable returns (uint256 amountIn);

    struct ExactOutputParams {
        bytes path;
        address recipient;
        uint256 deadline;
        uint256 amountOut;
        uint256 amountInMaximum;
    }

    /// @notice Swaps as little as possible of one token for `amountOut` of another along the specified path (reversed)
    /// @param params The parameters necessary for the multi-hop swap, encoded as `ExactOutputParams` in calldata
    /// @return amountIn The amount of the input token
    function exactOutput(ExactOutputParams calldata params) external payable returns (uint256 amountIn);
}
// File: src/unshETHZap.sol



// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.11;

import "communal/ReentrancyGuard.sol";
import "communal/SafeERC20.sol";
import "local/interfaces/ISwapRouter.sol";
import "communal/TransferHelper.sol";
//import "forge-std/console.sol";

interface ILSDVault {
    function exit(uint256 amount) external;
}

interface ILSDVaultV2 {
    function deposit(address lsd, uint256 amount) external;
    function depositMultipleNoCapCheck(uint256[] memory amounts) external;
    function isLsdEnabled(address lsd) external returns(bool);
    function getLsdIndex(address lsd) external returns(uint256);
    function remainingRoomToCap(address lsd, uint256 marginalDeposit) external returns(uint256);
}

interface FRXETH {
    function submitAndDeposit(address recipient) payable external;
}

interface SFRXETH {
    function deposit(uint256 assets, address receiver) external;
}

interface RETH {
    function swapTo(uint256 _uniswapPortion, uint256 _balancerPortion, uint256 _minTokensOut, uint256 _idealTokensOut) payable external;
}

interface IWETH is IERC20{
    function deposit() payable external;
    function withdraw(uint wad) external;
}

interface IWStETH is IERC20{
    function wrap(uint256 _stETHAmount) external;
}

contract unshETHZapv2 is ReentrancyGuard  {
    using SafeERC20 for IERC20;

    address public constant lsdVaultAddressV1 = 0xE76Ffee8722c21b390eebe71b67D95602f58237F;
    address public constant unshETHAddressV1 = 0x846982C0a47b0e9f4c13F3251ba972Bb8D32a8cA;
    address public constant wstETHAddress = 0x7f39C581F595B53c5cb19bD0b3f8dA6c935E2Ca0;
    address public constant frxETHMinterAddress = 0xbAFA44EFE7901E04E39Dad13167D089C559c1138;
    address public constant frxETHAddress = 0x5E8422345238F34275888049021821E8E08CAa1f;
    address public constant sfrxETHAddress = 0xac3E018457B222d93114458476f3E3416Abbe38F;
    address public constant rETHRouterAddress = 0x16D5A408e807db8eF7c578279BEeEe6b228f1c1C;
    address public constant rETHAddress = 0xae78736Cd615f374D3085123A210448E74Fc6393;
    address public constant cbETHAddress = 0xBe9895146f7AF43049ca1c1AE358B0541Ea49704;
    address public constant usdtAddress = 0xdAC17F958D2ee523a2206206994597C13D831ec7;
    address public constant wethAddress = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
    address public constant stEthAddress = 0xae7ab96520DE3A18E5e111B5EaAb095312D7fE84;

    address public immutable lsdVaultAddressV2; // 0x00..;
    address public immutable unshETHAddressV2; //0x00...;

    // uniswapv3 contracts
    ISwapRouter public uniswapRouterV3 = ISwapRouter(address(0xE592427A0AEce92De3Edee1F18E0157C05861564));
    uint24 public constant POOLFEE = 500; // pool fee to use uniswapv3. for now its set to 0.05% as default

    //constructor that sets up all the addresses
    constructor(address _lsdVaultAddressV2, address _unshETHAddressV2) {

        lsdVaultAddressV2 = _lsdVaultAddressV2;
        unshETHAddressV2 = _unshETHAddressV2;

        //give infinite approval for the lsd vault to spend the wstETH, sfrxETH, rETH, and cbETH
        TransferHelper.safeApprove(wstETHAddress, lsdVaultAddressV2, type(uint256).max);
        TransferHelper.safeApprove(sfrxETHAddress, lsdVaultAddressV2, type(uint256).max);
        TransferHelper.safeApprove(rETHAddress, lsdVaultAddressV2, type(uint256).max);
        TransferHelper.safeApprove(cbETHAddress, lsdVaultAddressV2, type(uint256).max);

        //approve weth and usdt for uniswap to facilitate swapping into lsds
        TransferHelper.safeApprove(wethAddress, address(uniswapRouterV3), type(uint256).max);
        TransferHelper.safeApprove(usdtAddress, address(uniswapRouterV3), type(uint256).max);

        //approve unsheth to be burnt by lsdVaultv1 in migrate
        TransferHelper.safeApprove(unshETHAddressV1, lsdVaultAddressV1, type(uint256).max);

        //approvals to facilitate wrapping of frxETH and stETH
        TransferHelper.safeApprove(frxETHAddress, sfrxETHAddress, type(uint256).max);
        TransferHelper.safeApprove(wstETHAddress, stEthAddress, type(uint256).max);
    }

    function mint_sfrxETH() external payable nonReentrant {
        _mint_sfrxETH(msg.value);
    }

    function _mint_sfrxETH(uint256 ethAmount) internal {
        // Mint sfrxETH
        FRXETH(frxETHMinterAddress).submitAndDeposit{value:ethAmount}(address(this));
        // Get balance of sfrxETH minted
        uint256 sfrxETHBalance = IERC20(sfrxETHAddress).balanceOf(address(this));
        // Check to see that the balance minted is greater than 0
        require(sfrxETHBalance > 0, 'sfrxETH minting failed');
        // Call LSDVault to mint unshETH
        _deposit_lsd(sfrxETHAddress, sfrxETHBalance);
    }

    function mint_wstETH() external payable nonReentrant {
        _mint_wstETH(msg.value);
    }

    function _mint_wstETH(uint256 ethAmount) internal {
        // Mint wstETH
        (bool success, )= address(wstETHAddress).call{value:ethAmount}("");
        // Check the success of the wstETH mint
        require(success, "wstETH minting failed");
        // Get balance of wstETH minted
        uint256 wstETHBalance = IERC20(wstETHAddress).balanceOf(address(this));
        // Call LSDVault to mint unshETH
        _deposit_lsd(wstETHAddress, wstETHBalance);
    }

    function mint_rETH(uint256 _uniswapPortion, uint256 _balancerPortion, uint256 _minTokensOut, uint256 _idealTokensOut) external payable nonReentrant {
        //Mint rETH
        RETH(rETHRouterAddress).swapTo{value:msg.value}(_uniswapPortion, _balancerPortion, _minTokensOut, _idealTokensOut);
        // Get balance of rETH minted
        uint256 rETHBalance = IERC20(rETHAddress).balanceOf(address(this));
        // Check to see that the balance minted is greater than or equal to the minTokensOut
        require(rETHBalance >= _minTokensOut, 'rETH minting failed');
        // Call LSDVault to mint unshETH
        _deposit_lsd(rETHAddress, rETHBalance);
    }

    function deposit_lsd(address lsdAddress, uint256 amount) external nonReentrant {
        require(ILSDVaultV2(lsdVaultAddressV2).isLsdEnabled(lsdAddress), "LSD is not enabled");
        // Assume user has approved token
        TransferHelper.safeTransferFrom(lsdAddress, msg.sender, address(this), amount);
        _deposit_lsd(lsdAddress, amount);
    }

    function deposit_stEth(uint256 stETHAmount) external nonReentrant {
        // Deposit stETH into wstETH
        IWStETH(wstETHAddress).wrap(stETHAmount);
        // Get the wrapped balance
        uint256 wstETHAmount = IERC20(wstETHAddress).balanceOf(address(this));
        // Deposit into lsd vault
        _deposit_lsd(wstETHAddress, wstETHAmount);
    }

    function _deposit_frxEth(uint256 frxETHAmount) internal {
        // Deposit frxETH into sfrxETH
        SFRXETH(sfrxETHAddress).deposit(frxETHAmount, address(this));
        // Get the wrapped balance
        uint256 sfrxETHAmount = IERC20(sfrxETHAddress).balanceOf(address(this));
        // Deposit into lsd vault
        _deposit_lsd(sfrxETHAddress, sfrxETHAmount);
    }

    function _deposit_lsd(address lsdAddress, uint256 amount) internal {
        // Call LSDVault to mint unshETH
        ILSDVaultV2(lsdVaultAddressV2).deposit(lsdAddress, amount);
        // Send unsheth to the msg.sender
        TransferHelper.safeTransfer(unshETHAddressV2, msg.sender, IERC20(unshETHAddressV2).balanceOf(address(this)));
    }


    //Allows user to migrate their unshETH v1 to v2
    function migrate(uint256 amount) public nonReentrant {
        //assume the user has approved the amount
        //transfer unsheth to this contract
        TransferHelper.safeTransferFrom(unshETHAddressV1, msg.sender, address(this), amount);

        //the contract will burn unshETHV1 and receive each of the underlying LSDs
        ILSDVault(lsdVaultAddressV1).exit(amount);
        // Get balance of wstETH and deposit to new vault
        uint256 wstETHBalance = IERC20(wstETHAddress).balanceOf(address(this));
        //print the balance of each token
        uint256 sfrxETHBalance = IERC20(sfrxETHAddress).balanceOf(address(this));
        uint256 rETHBalance = IERC20(rETHAddress).balanceOf(address(this));
        uint256 cbETHBalance = IERC20(cbETHAddress).balanceOf(address(this));

        ILSDVaultV2 vaultV2 = ILSDVaultV2(lsdVaultAddressV2);

        //Populate the amountsToDeposit array based on the canonical indices used by the LSDVaultV2
        uint256[4] memory amountsToDeposit;
        
        amountsToDeposit[vaultV2.getLsdIndex(wstETHAddress)]  = wstETHBalance;
        amountsToDeposit[vaultV2.getLsdIndex(sfrxETHAddress)] = sfrxETHBalance;
        amountsToDeposit[vaultV2.getLsdIndex(rETHAddress)]    = rETHBalance;
        amountsToDeposit[vaultV2.getLsdIndex(cbETHAddress)]   = cbETHBalance;

        //Gas efficient multiLsdDeposit function
        (bool success, ) = address(lsdVaultAddressV2).call(abi.encodeWithSignature("depositMultipleNoCapCheck(uint256[4])", amountsToDeposit));
        require(success, "depositMultipleNoCapCheck failed");
        //transfer unshETHv2 received to msg.sender
        uint256 unshETHv2Bal = IERC20(unshETHAddressV2).balanceOf(address(this));
        TransferHelper.safeTransfer(unshETHAddressV2, msg.sender, unshETHv2Bal);
    }

    function mint_with_usdt(uint256 usdtAmount, uint256 amountOutMin, uint256 pathId) external nonReentrant {

        require(pathId <= 5, "pathId out of bounds");
        // transfer USDT to this contract
        TransferHelper.safeTransferFrom(usdtAddress, msg.sender, address(this), usdtAmount);

        //We choose 1 of 6 paths.
        //Paths 0 and 1 swap usdt to ETH then deposits that ETH to mint wstETH and sfrxETH, then mint unshETH
        //Paths 2 to 5 swap usdt->weth->lsd then mints unshETH with that
        if(pathId == 0) {
            //swap usdt to eth
            uint256 ethAmountOut = _swap_usdt_ETH(usdtAmount, amountOutMin);
            //mint wstETH->unshETH with ETH
            _mint_wstETH(ethAmountOut);
        } else if(pathId == 1) {
            //swap usdt to eth
            uint256 ethAmountOut = _swap_usdt_ETH(usdtAmount, amountOutMin);
            //mint sfrxETH->unshETH with ETH
            _mint_sfrxETH(ethAmountOut);
        } else if (pathId == 2) {
            //swap usdt to cbETH
            uint256 cbEthAmountOut = _swap_usdt_lsd(usdtAmount, amountOutMin, cbETHAddress);
            //mint unshETH with cbETH
            _deposit_lsd(cbETHAddress, cbEthAmountOut);
        } else if (pathId == 3) {
            //swap usdt to rETH
            uint256 rETHAmountOut = _swap_usdt_lsd(usdtAmount, amountOutMin, rETHAddress);
            //mint unshETH with rETH
            _deposit_lsd(rETHAddress, rETHAmountOut);
        } else if (pathId == 4) {
            //swap usdt to wstETH
            uint256 wstETHAmountOut = _swap_usdt_lsd(usdtAmount, amountOutMin, wstETHAddress);
            //mint unshETH with wstETH
            _deposit_lsd(wstETHAddress, wstETHAmountOut);
        } else if (pathId == 5) {
            //swap usdt to frxETH (sfrxETH not liquid)
            uint256 frxEthAmountOut = _swap_usdt_lsd(usdtAmount, amountOutMin, frxETHAddress);
            //mint unshETH with frxETH->sfrxETH
            _deposit_frxEth(frxEthAmountOut);
        }
    }

    function _swap_usdt_ETH(uint256 _usdtAmount, uint256 _amountOutMin) internal returns(uint256) {

        ISwapRouter.ExactInputSingleParams memory params = ISwapRouter.ExactInputSingleParams({
            tokenIn: usdtAddress,
            tokenOut: wethAddress,
            fee: POOLFEE,
            recipient: address(this),
            deadline: block.timestamp + 3600,
            amountIn: _usdtAmount,
            amountOutMinimum: _amountOutMin,
            sqrtPriceLimitX96: 0
        });

        uint256 wethAmountOut = uniswapRouterV3.exactInputSingle(params);

        //convert weth to ETH
        IWETH(wethAddress).withdraw(wethAmountOut);
        return(wethAmountOut);
    }

    function _swap_usdt_lsd(uint256 _usdtAmount, uint256 _amountOutMin, address _lsdAddress) internal returns(uint256) {

        ISwapRouter.ExactInputParams memory params = ISwapRouter.ExactInputParams({
            path: abi.encodePacked(usdtAddress, POOLFEE, wethAddress, POOLFEE, _lsdAddress),
            recipient: address(this),
            deadline: block.timestamp + 3600,
            amountIn: _usdtAmount,
            amountOutMinimum: _amountOutMin
        });

        uint256 lsdAmountOut = uniswapRouterV3.exactInput(params);
        return(lsdAmountOut);
    }

    function mint_unsheth_with_eth(uint256 amountOutMin, uint256 pathId) external payable nonReentrant {
        // Validate the path
        require(pathId <= 5, "Invalid path");
        // If one of the paths that requires a minimum amount, validate it
        if(pathId >= 2) {
            require(amountOutMin > 0, "Specify amountOutMin if picking pathId 2 to 5");
        }
        if (pathId <= 1) {
            _ETH_to_unsheth_mintPaths(msg.value, pathId);
        } else {
            IWETH(wethAddress).deposit{value: msg.value}();
            uint256 wethAmount = IERC20(wethAddress).balanceOf(address(this));
            _weth_to_unsheth_swapPaths(wethAmount, amountOutMin, pathId);
        }
    }

    function _ETH_to_unsheth_mintPaths(uint256 ethAmount, uint256 pathId) internal {
        require(pathId <= 1, "only paths 0 and 1 allowed");
        if(pathId == 0) {
            _mint_wstETH(ethAmount);
        } else if(pathId == 1) {
            _mint_sfrxETH(ethAmount);
        }
    }

    function _weth_to_unsheth_swapPaths(uint256 wethAmount, uint256 amountOutMin, uint256 pathId) internal {
        require(pathId >= 2 && pathId <= 5, "only paths 2 to 5 allowed");
        if(pathId == 2) {
            //swap weth to cbETH
            uint256 cbEthAmountOut = _swap_weth_lsd(wethAmount, amountOutMin, cbETHAddress);
            //mint unshETH with cbETH
            _deposit_lsd(cbETHAddress, cbEthAmountOut);
        } else if (pathId == 3) {
            //swap weth to rETH
            uint256 rETHAmountOut = _swap_weth_lsd(wethAmount, amountOutMin, rETHAddress);
            //mint unshETH with rETH
            _deposit_lsd(rETHAddress, rETHAmountOut);
        } else if (pathId == 4) {
            //swap usdt to wstETH
            uint256 wstETHAmountOut = _swap_weth_lsd(wethAmount, amountOutMin, wstETHAddress);
            //mint unshETH with wstETH
            _deposit_lsd(wstETHAddress, wstETHAmountOut);
        } else if (pathId == 5) {
            //swap usdt to frxETH (sfrxETH not liquid)
            uint256 frxEthAmountOut = _swap_weth_lsd(wethAmount, amountOutMin, frxETHAddress);
            //mint unshETH with frxETH->sfrxETH
            _deposit_frxEth(frxEthAmountOut);
        }
    }

    function _swap_weth_lsd(uint256 _wethAmount, uint256 _amountOutMin, address _lsdAddress) internal returns(uint256) {

        ISwapRouter.ExactInputSingleParams memory params = ISwapRouter.ExactInputSingleParams({
            tokenIn: wethAddress,
            tokenOut: _lsdAddress,
            fee: POOLFEE,
            recipient: address(this),
            deadline: block.timestamp + 3600,
            amountIn: _wethAmount,
            amountOutMinimum: _amountOutMin,
            sqrtPriceLimitX96: 0
        });

        uint256 lsdAmountOut = uniswapRouterV3.exactInputSingle(params);
        return(lsdAmountOut);
    }

    //Allow receiving eth to the contract
    receive() external payable {}
}