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// SPDX-License-Identifier: MIT License
pragma solidity ^0.8.21;

import "lib/solmate/src/tokens/ERC4626.sol";

interface IInvEscrow {
    function balance() external view returns (uint);
    function claimDBR() external;
    function claimable() external view returns (uint);
}

interface IMarket {
    function deposit(uint256 amount) external;
    function withdraw(uint256 amount) external;
    function dbr() external returns (address);
    function escrows(address user) external returns (address);
}

interface IERC20 {
    function transfer(address, uint) external returns (bool);
    function transferFrom(address, address, uint) external returns (bool);
    function balanceOf(address) external view returns (uint);
}

/**
 * @title sINV
 * @dev Auto-compounding ERC4626 wrapper for asset FiRM deposits utilizing xy=k auctions.
 * WARNING: While this vault is safe to be used as collateral in lending markets, it should not be allowed as a borrowable asset.
 * Any protocol in which sudden, large and atomic increases in the value of an asset may be a security risk should not integrate this vault.
 */
contract sINV is ERC4626{

    struct RevenueData {
        uint96 periodRevenue;
        uint96 lastPeriodRevenue;
        uint64 lastBuyPeriod;
    }

    struct KData {
        uint192 targetK;
        uint64 lastKUpdate;
    }
    
    uint256 public constant MIN_ASSETS = 10**16; // 1 cent
    uint256 public constant MIN_SHARES = 10**18;
    uint256 public constant MAX_ASSETS = 10**32; // 100 trillion asset
    uint256 public constant period = 7 days;
    uint256 public depositLimit;
    IMarket public immutable invMarket;
    IInvEscrow public immutable invEscrow;
    ERC20 public immutable DBR;
    RevenueData public revenueData;
    KData public kData;
    address public gov;
    address public guardian;
    address public pendingGov;
    uint256 public minBuffer;
    uint256 public prevK;

    function periodRevenue() external view returns(uint256){return revenueData.periodRevenue;}
    function lastPeriodRevenue() external view returns(uint256){return revenueData.lastPeriodRevenue;}
    function lastBuyPeriod() external view returns(uint256){return revenueData.lastBuyPeriod;}
    function targetK() external view returns(uint256){return kData.targetK;}
    function lastKUpdate() external view returns(uint256){return kData.lastKUpdate;}

    error OnlyGov();
    error OnlyPendingGov();
    error OnlyGuardian();
    error KTooLow(uint k, uint limit);
    error BelowMinShares();
    error AboveDepositLimit();
    error DepositLimitMustIncrease();
    error InsufficientAssets();
    error Invariant();
    error UnauthorizedTokenWithdrawal();

    /**
     * @dev Constructor for sINV contract.
     * WARNING: MIN_SHARES will always be unwithdrawable from the vault. Deployer should deposit enough to mint MIN_SHARES to avoid causing user grief.
     * @param _inv Address of the asset token.
     * @param _invMarket Address of the asset FiRM market.
     * @param _gov Address of the governance.
     * @param _K Initial value for the K variable used in calculations.
     */
    constructor(
        address _inv,
        address _invMarket,
        address _gov,
        address _guardian,
        uint256 _depositLimit,
        uint256 _K
    ) ERC4626(ERC20(_inv), "Staked Inv", "sINV") {
        if(_K == 0) revert KTooLow(_K, 1);
        IMarket(_invMarket).deposit(0); //creates an escrow on behalf of the sINV contract
        invEscrow = IInvEscrow(IMarket(_invMarket).escrows(address(this)));
        invMarket = IMarket(_invMarket);
        DBR = ERC20(IMarket(_invMarket).dbr());
        gov = _gov;
        guardian = _guardian;
        kData.targetK = uint192(_K);
        depositLimit = _depositLimit;
        prevK = _K;
        asset.approve(address(invMarket), type(uint).max);
    }

    modifier onlyGov() {
        if(msg.sender != gov) revert OnlyGov();
        _;
    }

    modifier onlyPendingGov() {
        if(msg.sender != pendingGov) revert OnlyPendingGov();
        _;
    }

    modifier onlyGuardian() {
        if(msg.sender != guardian) revert OnlyGuardian();
        _;
    }

    /**
     * @dev Hook that is called after tokens are deposited into the contract.
     */    
    function afterDeposit(uint256, uint256) internal override {
        if(totalSupply < MIN_SHARES) revert BelowMinShares();
        if(totalAssets() > depositLimit) revert AboveDepositLimit();
        uint256 invBal = asset.balanceOf(address(this));
        if(invBal > minBuffer){
            invMarket.deposit(invBal - minBuffer);
        }
    }

    /**
     * @dev Hook that is called before tokens are withdrawn from the contract.
     * @param assets The amount of assets to withdraw.
     * @param shares The amount of shares to withdraw
     */
    function beforeWithdraw(uint256 assets, uint256 shares) internal override {
        uint256 _totalAssets = totalAssets();
        if(_totalAssets < assets + MIN_ASSETS) revert InsufficientAssets();
        if(totalSupply < shares + MIN_SHARES) revert BelowMinShares();
        uint256 invBal = asset.balanceOf(address(this));
        if(assets > invBal) {
            uint256 withdrawAmount = assets - invBal + minBuffer;
            if(_totalAssets < withdrawAmount){
                invMarket.withdraw(assets - invBal);
            } else {
                invMarket.withdraw(withdrawAmount);
            }
        }
    }

    /**
     * @dev Calculates the total assets controlled by the contract.
     * Period revenue is distributed linearly over the following week.
     * @return The total assets in the contract.
     */
    function totalAssets() public view override returns (uint) {
        uint256 periodsSinceLastBuy = block.timestamp / period - revenueData.lastBuyPeriod;
        uint256 _lastPeriodRevenue = revenueData.lastPeriodRevenue;
        uint256 _periodRevenue = revenueData.periodRevenue;
        uint256 invBal = invEscrow.balance() + asset.balanceOf(address(this));
        if(periodsSinceLastBuy > 1){
            return invBal < MAX_ASSETS ? invBal : MAX_ASSETS;
        } else if(periodsSinceLastBuy == 1) {
            _lastPeriodRevenue = _periodRevenue;
            _periodRevenue = 0;
        }
        uint256 remainingLastRevenue = _lastPeriodRevenue * (period - block.timestamp % period) / period;
        uint256 lockedRevenue = remainingLastRevenue + _periodRevenue;
        uint256 actualAssets;
        if(invBal > lockedRevenue){
            actualAssets = invBal - lockedRevenue;
        }
        return actualAssets < MAX_ASSETS ? actualAssets : MAX_ASSETS;
    }

    function updatePeriodRevenue(uint96 newRevenue) internal {
        uint256 currentPeriod = block.timestamp / period;
        if(currentPeriod > revenueData.lastBuyPeriod) {
            revenueData.lastPeriodRevenue = revenueData.periodRevenue;
            revenueData.periodRevenue = newRevenue;
            revenueData.lastBuyPeriod = uint64(currentPeriod);
        } else {
            revenueData.periodRevenue += newRevenue;
        }
    }

    /**
     * @dev Returns the current value of K, which is a weighted average between prevK and kData.targetK.
     * @return The current value of K.
     */
    function getK() public view returns (uint) {
        uint256 timeElapsed = block.timestamp - kData.lastKUpdate;
        if(timeElapsed > period) {
            return kData.targetK;
        }
        uint256 prevWeight = period - timeElapsed;
        return (prevK * prevWeight + kData.targetK * timeElapsed) / period;
    }

    /**
     * @dev Calculates the asset reserve based on the current DBR reserve.
     * @return The calculated asset reserve.
     */
    function getInvReserve() public view returns (uint) {
        return getK() / getDbrReserve();
    }

    /**
     * @dev Calculates the asset reserve for a given DBR reserve.
     * @param DBRReserve The DBR reserve value.
     * @return The calculated asset reserve.
     */
    function getInvReserve(uint256 DBRReserve) public view returns (uint) {
        return getK() / DBRReserve;
    }

    /**
     * @dev Returns the current DBR reserve as the sum of DBR balance and claimable DBR
     * @return The current DBR reserve.
     */
    function getDbrReserve() public view returns (uint) {
        return DBR.balanceOf(address(this)) + invEscrow.claimable();
    }

    /**
     * @dev Sets a new target K value.
     * @param _K The new target K value.
     */
    function setTargetK(uint256 _K) external onlyGov {
        if(_K < getDbrReserve()) revert KTooLow(_K, getDbrReserve());
        prevK = getK();
        kData.targetK = uint192(_K);
        kData.lastKUpdate = uint64(block.timestamp);
        emit SetTargetK(_K);
    }

    /**
     * @notice Set the min buffer
     * @dev Min buffer is the buffer of INV held by the sINV contract, which can be withdrawn much more cheaply than if they were staked
     * @param _minBuffer The new min buffer
     */
    function setMinBuffer(uint256 _minBuffer) external onlyGov {
        minBuffer = _minBuffer;
        emit SetMinBuffer(_minBuffer);
    }

    /**
     * @dev Allows users to buy DBR with asset.
     * WARNING: Never expose this directly to a UI as it's likely to cause a loss unless a transaction is executed immediately.
     * Instead use the sINVHelper function or custom smart contract code.
     * @param exactInvIn The exact amount of asset to spend.
     * @param exactDbrOut The exact amount of DBR to receive.
     * @param to The address that will receive the DBR.
     */
    function buyDBR(uint256 exactInvIn, uint256 exactDbrOut, address to) external {
        require(exactInvIn <= type(uint96).max, "EXCEED UINT96");
        uint256 DBRBalance = DBR.balanceOf(address(this));
        if(exactDbrOut > DBRBalance){
            invEscrow.claimDBR();
            DBRBalance = DBR.balanceOf(address(this));
        } else {
            DBRBalance += invEscrow.claimable(); 
        }
        uint256 k = getK();
        uint256 DBRReserve = DBRBalance - exactDbrOut;
        uint256 invReserve = k / DBRBalance + exactInvIn;
        if(invReserve * DBRReserve < k) revert Invariant();
        updatePeriodRevenue(uint96(exactInvIn));
        asset.transferFrom(msg.sender, address(this), exactInvIn);
        DBR.transfer(to, exactDbrOut);
        emit Buy(msg.sender, to, exactInvIn, exactDbrOut);
    }

    /**
     * @notice Sets a new depositLimit. Only callable by guardian.
     * @dev Deposit limit must always increase
     * @param _depositLimit The new deposit limit
     */
    function setDepositLimit(uint _depositLimit) external onlyGuardian {
        if(_depositLimit <= depositLimit) revert DepositLimitMustIncrease();
        depositLimit = _depositLimit;
    }

    /**
     * @notice Sets the guardian that can increase the deposit limit. Only callable by governance.
     * @param _guardian The new guardian.
     */
    function setGuardian(address _guardian) external onlyGov {
        guardian = _guardian;
    }

    /**
     * @dev Sets a new pending governance address.
     * @param _gov The address of the new pending governance.
     */
    function setPendingGov(address _gov) external onlyGov {
        pendingGov = _gov;
    }

    /**
     * @dev Allows the pending governance to accept its role.
     */
    function acceptGov() external onlyPendingGov {
        gov = pendingGov;
        pendingGov = address(0);
    }

    /**
     * @dev Allows governance to sweep any ERC20 token from the contract.
     * @dev Excludes the ability to sweep DBR tokens.
     * @param token The address of the ERC20 token to sweep.
     * @param amount The amount of tokens to sweep.
     * @param to The recipient address of the swept tokens.
     */
    function sweep(address token, uint256 amount, address to) public onlyGov {
        if(address(DBR) == token ||
            address(asset) == token)
            revert UnauthorizedTokenWithdrawal();
        IERC20(token).transfer(to, amount);
    }
    
    /**
     * @notice Allows anyone to reapprove inv spending for invMarket
     */
    function reapprove() external {
        asset.approve(address(invMarket), type(uint).max);
    }
    

    event Buy(address indexed caller, address indexed to, uint256 exactInvIn, uint256 exactDbrOut);
    event SetTargetK(uint256 newTargetK);
    event SetMinBuffer(uint256 newMinBuffer);
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;

import {ERC20} from "../tokens/ERC20.sol";
import {SafeTransferLib} from "../utils/SafeTransferLib.sol";
import {FixedPointMathLib} from "../utils/FixedPointMathLib.sol";

/// @notice Minimal ERC4626 tokenized Vault implementation.
/// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/tokens/ERC4626.sol)
abstract contract ERC4626 is ERC20 {
    using SafeTransferLib for ERC20;
    using FixedPointMathLib for uint256;

    /*//////////////////////////////////////////////////////////////
                                 EVENTS
    //////////////////////////////////////////////////////////////*/

    event Deposit(address indexed caller, address indexed owner, uint256 assets, uint256 shares);

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

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

    ERC20 public immutable asset;

    constructor(
        ERC20 _asset,
        string memory _name,
        string memory _symbol
    ) ERC20(_name, _symbol, _asset.decimals()) {
        asset = _asset;
    }

    /*//////////////////////////////////////////////////////////////
                        DEPOSIT/WITHDRAWAL LOGIC
    //////////////////////////////////////////////////////////////*/

    function deposit(uint256 assets, address receiver) public virtual returns (uint256 shares) {
        // Check for rounding error since we round down in previewDeposit.
        require((shares = previewDeposit(assets)) != 0, "ZERO_SHARES");

        // Need to transfer before minting or ERC777s could reenter.
        asset.safeTransferFrom(msg.sender, address(this), assets);

        _mint(receiver, shares);

        emit Deposit(msg.sender, receiver, assets, shares);

        afterDeposit(assets, shares);
    }

    function mint(uint256 shares, address receiver) public virtual returns (uint256 assets) {
        assets = previewMint(shares); // No need to check for rounding error, previewMint rounds up.

        // Need to transfer before minting or ERC777s could reenter.
        asset.safeTransferFrom(msg.sender, address(this), assets);

        _mint(receiver, shares);

        emit Deposit(msg.sender, receiver, assets, shares);

        afterDeposit(assets, shares);
    }

    function withdraw(
        uint256 assets,
        address receiver,
        address owner
    ) public virtual returns (uint256 shares) {
        shares = previewWithdraw(assets); // No need to check for rounding error, previewWithdraw rounds up.

        if (msg.sender != owner) {
            uint256 allowed = allowance[owner][msg.sender]; // Saves gas for limited approvals.

            if (allowed != type(uint256).max) allowance[owner][msg.sender] = allowed - shares;
        }

        beforeWithdraw(assets, shares);

        _burn(owner, shares);

        emit Withdraw(msg.sender, receiver, owner, assets, shares);

        asset.safeTransfer(receiver, assets);
    }

    function redeem(
        uint256 shares,
        address receiver,
        address owner
    ) public virtual returns (uint256 assets) {
        if (msg.sender != owner) {
            uint256 allowed = allowance[owner][msg.sender]; // Saves gas for limited approvals.

            if (allowed != type(uint256).max) allowance[owner][msg.sender] = allowed - shares;
        }

        // Check for rounding error since we round down in previewRedeem.
        require((assets = previewRedeem(shares)) != 0, "ZERO_ASSETS");

        beforeWithdraw(assets, shares);

        _burn(owner, shares);

        emit Withdraw(msg.sender, receiver, owner, assets, shares);

        asset.safeTransfer(receiver, assets);
    }

    /*//////////////////////////////////////////////////////////////
                            ACCOUNTING LOGIC
    //////////////////////////////////////////////////////////////*/

    function totalAssets() public view virtual returns (uint256);

    function convertToShares(uint256 assets) public view virtual returns (uint256) {
        uint256 supply = totalSupply; // Saves an extra SLOAD if totalSupply is non-zero.

        return supply == 0 ? assets : assets.mulDivDown(supply, totalAssets());
    }

    function convertToAssets(uint256 shares) public view virtual returns (uint256) {
        uint256 supply = totalSupply; // Saves an extra SLOAD if totalSupply is non-zero.

        return supply == 0 ? shares : shares.mulDivDown(totalAssets(), supply);
    }

    function previewDeposit(uint256 assets) public view virtual returns (uint256) {
        return convertToShares(assets);
    }

    function previewMint(uint256 shares) public view virtual returns (uint256) {
        uint256 supply = totalSupply; // Saves an extra SLOAD if totalSupply is non-zero.

        return supply == 0 ? shares : shares.mulDivUp(totalAssets(), supply);
    }

    function previewWithdraw(uint256 assets) public view virtual returns (uint256) {
        uint256 supply = totalSupply; // Saves an extra SLOAD if totalSupply is non-zero.

        return supply == 0 ? assets : assets.mulDivUp(supply, totalAssets());
    }

    function previewRedeem(uint256 shares) public view virtual returns (uint256) {
        return convertToAssets(shares);
    }

    /*//////////////////////////////////////////////////////////////
                     DEPOSIT/WITHDRAWAL LIMIT LOGIC
    //////////////////////////////////////////////////////////////*/

    function maxDeposit(address) public view virtual returns (uint256) {
        return type(uint256).max;
    }

    function maxMint(address) public view virtual returns (uint256) {
        return type(uint256).max;
    }

    function maxWithdraw(address owner) public view virtual returns (uint256) {
        return convertToAssets(balanceOf[owner]);
    }

    function maxRedeem(address owner) public view virtual returns (uint256) {
        return balanceOf[owner];
    }

    /*//////////////////////////////////////////////////////////////
                          INTERNAL HOOKS LOGIC
    //////////////////////////////////////////////////////////////*/

    function beforeWithdraw(uint256 assets, uint256 shares) internal virtual {}

    function afterDeposit(uint256 assets, uint256 shares) internal virtual {}
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;

/// @notice Modern and gas efficient ERC20 + EIP-2612 implementation.
/// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/tokens/ERC20.sol)
/// @author Modified from Uniswap (https://github.com/Uniswap/uniswap-v2-core/blob/master/contracts/UniswapV2ERC20.sol)
/// @dev Do not manually set balances without updating totalSupply, as the sum of all user balances must not exceed it.
abstract contract ERC20 {
    /*//////////////////////////////////////////////////////////////
                                 EVENTS
    //////////////////////////////////////////////////////////////*/

    event Transfer(address indexed from, address indexed to, uint256 amount);

    event Approval(address indexed owner, address indexed spender, uint256 amount);

    /*//////////////////////////////////////////////////////////////
                            METADATA STORAGE
    //////////////////////////////////////////////////////////////*/

    string public name;

    string public symbol;

    uint8 public immutable decimals;

    /*//////////////////////////////////////////////////////////////
                              ERC20 STORAGE
    //////////////////////////////////////////////////////////////*/

    uint256 public totalSupply;

    mapping(address => uint256) public balanceOf;

    mapping(address => mapping(address => uint256)) public allowance;

    /*//////////////////////////////////////////////////////////////
                            EIP-2612 STORAGE
    //////////////////////////////////////////////////////////////*/

    uint256 internal immutable INITIAL_CHAIN_ID;

    bytes32 internal immutable INITIAL_DOMAIN_SEPARATOR;

    mapping(address => uint256) public nonces;

    /*//////////////////////////////////////////////////////////////
                               CONSTRUCTOR
    //////////////////////////////////////////////////////////////*/

    constructor(
        string memory _name,
        string memory _symbol,
        uint8 _decimals
    ) {
        name = _name;
        symbol = _symbol;
        decimals = _decimals;

        INITIAL_CHAIN_ID = block.chainid;
        INITIAL_DOMAIN_SEPARATOR = computeDomainSeparator();
    }

    /*//////////////////////////////////////////////////////////////
                               ERC20 LOGIC
    //////////////////////////////////////////////////////////////*/

    function approve(address spender, uint256 amount) public virtual returns (bool) {
        allowance[msg.sender][spender] = amount;

        emit Approval(msg.sender, spender, amount);

        return true;
    }

    function transfer(address to, uint256 amount) public virtual returns (bool) {
        balanceOf[msg.sender] -= amount;

        // Cannot overflow because the sum of all user
        // balances can't exceed the max uint256 value.
        unchecked {
            balanceOf[to] += amount;
        }

        emit Transfer(msg.sender, to, amount);

        return true;
    }

    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) public virtual returns (bool) {
        uint256 allowed = allowance[from][msg.sender]; // Saves gas for limited approvals.

        if (allowed != type(uint256).max) allowance[from][msg.sender] = allowed - amount;

        balanceOf[from] -= amount;

        // Cannot overflow because the sum of all user
        // balances can't exceed the max uint256 value.
        unchecked {
            balanceOf[to] += amount;
        }

        emit Transfer(from, to, amount);

        return true;
    }

    /*//////////////////////////////////////////////////////////////
                             EIP-2612 LOGIC
    //////////////////////////////////////////////////////////////*/

    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) public virtual {
        require(deadline >= block.timestamp, "PERMIT_DEADLINE_EXPIRED");

        // Unchecked because the only math done is incrementing
        // the owner's nonce which cannot realistically overflow.
        unchecked {
            address recoveredAddress = ecrecover(
                keccak256(
                    abi.encodePacked(
                        "\x19\x01",
                        DOMAIN_SEPARATOR(),
                        keccak256(
                            abi.encode(
                                keccak256(
                                    "Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)"
                                ),
                                owner,
                                spender,
                                value,
                                nonces[owner]++,
                                deadline
                            )
                        )
                    )
                ),
                v,
                r,
                s
            );

            require(recoveredAddress != address(0) && recoveredAddress == owner, "INVALID_SIGNER");

            allowance[recoveredAddress][spender] = value;
        }

        emit Approval(owner, spender, value);
    }

    function DOMAIN_SEPARATOR() public view virtual returns (bytes32) {
        return block.chainid == INITIAL_CHAIN_ID ? INITIAL_DOMAIN_SEPARATOR : computeDomainSeparator();
    }

    function computeDomainSeparator() internal view virtual returns (bytes32) {
        return
            keccak256(
                abi.encode(
                    keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"),
                    keccak256(bytes(name)),
                    keccak256("1"),
                    block.chainid,
                    address(this)
                )
            );
    }

    /*//////////////////////////////////////////////////////////////
                        INTERNAL MINT/BURN LOGIC
    //////////////////////////////////////////////////////////////*/

    function _mint(address to, uint256 amount) internal virtual {
        totalSupply += amount;

        // Cannot overflow because the sum of all user
        // balances can't exceed the max uint256 value.
        unchecked {
            balanceOf[to] += amount;
        }

        emit Transfer(address(0), to, amount);
    }

    function _burn(address from, uint256 amount) internal virtual {
        balanceOf[from] -= amount;

        // Cannot underflow because a user's balance
        // will never be larger than the total supply.
        unchecked {
            totalSupply -= amount;
        }

        emit Transfer(from, address(0), amount);
    }
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;

import {ERC20} from "../tokens/ERC20.sol";

/// @notice Safe ETH and ERC20 transfer library that gracefully handles missing return values.
/// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/utils/SafeTransferLib.sol)
/// @dev Use with caution! Some functions in this library knowingly create dirty bits at the destination of the free memory pointer.
/// @dev Note that none of the functions in this library check that a token has code at all! That responsibility is delegated to the caller.
library SafeTransferLib {
    /*//////////////////////////////////////////////////////////////
                             ETH OPERATIONS
    //////////////////////////////////////////////////////////////*/

    function safeTransferETH(address to, uint256 amount) internal {
        bool success;

        /// @solidity memory-safe-assembly
        assembly {
            // Transfer the ETH and store if it succeeded or not.
            success := call(gas(), to, amount, 0, 0, 0, 0)
        }

        require(success, "ETH_TRANSFER_FAILED");
    }

    /*//////////////////////////////////////////////////////////////
                            ERC20 OPERATIONS
    //////////////////////////////////////////////////////////////*/

    function safeTransferFrom(
        ERC20 token,
        address from,
        address to,
        uint256 amount
    ) internal {
        bool success;

        /// @solidity memory-safe-assembly
        assembly {
            // Get a pointer to some free memory.
            let freeMemoryPointer := mload(0x40)

            // Write the abi-encoded calldata into memory, beginning with the function selector.
            mstore(freeMemoryPointer, 0x23b872dd00000000000000000000000000000000000000000000000000000000)
            mstore(add(freeMemoryPointer, 4), and(from, 0xffffffffffffffffffffffffffffffffffffffff)) // Append and mask the "from" argument.
            mstore(add(freeMemoryPointer, 36), and(to, 0xffffffffffffffffffffffffffffffffffffffff)) // Append and mask the "to" argument.
            mstore(add(freeMemoryPointer, 68), amount) // Append the "amount" argument. Masking not required as it's a full 32 byte type.

            success := and(
                // Set success to whether the call reverted, if not we check it either
                // returned exactly 1 (can't just be non-zero data), or had no return data.
                or(and(eq(mload(0), 1), gt(returndatasize(), 31)), iszero(returndatasize())),
                // We use 100 because the length of our calldata totals up like so: 4 + 32 * 3.
                // We use 0 and 32 to copy up to 32 bytes of return data into the scratch space.
                // Counterintuitively, this call must be positioned second to the or() call in the
                // surrounding and() call or else returndatasize() will be zero during the computation.
                call(gas(), token, 0, freeMemoryPointer, 100, 0, 32)
            )
        }

        require(success, "TRANSFER_FROM_FAILED");
    }

    function safeTransfer(
        ERC20 token,
        address to,
        uint256 amount
    ) internal {
        bool success;

        /// @solidity memory-safe-assembly
        assembly {
            // Get a pointer to some free memory.
            let freeMemoryPointer := mload(0x40)

            // Write the abi-encoded calldata into memory, beginning with the function selector.
            mstore(freeMemoryPointer, 0xa9059cbb00000000000000000000000000000000000000000000000000000000)
            mstore(add(freeMemoryPointer, 4), and(to, 0xffffffffffffffffffffffffffffffffffffffff)) // Append and mask the "to" argument.
            mstore(add(freeMemoryPointer, 36), amount) // Append the "amount" argument. Masking not required as it's a full 32 byte type.

            success := and(
                // Set success to whether the call reverted, if not we check it either
                // returned exactly 1 (can't just be non-zero data), or had no return data.
                or(and(eq(mload(0), 1), gt(returndatasize(), 31)), iszero(returndatasize())),
                // We use 68 because the length of our calldata totals up like so: 4 + 32 * 2.
                // We use 0 and 32 to copy up to 32 bytes of return data into the scratch space.
                // Counterintuitively, this call must be positioned second to the or() call in the
                // surrounding and() call or else returndatasize() will be zero during the computation.
                call(gas(), token, 0, freeMemoryPointer, 68, 0, 32)
            )
        }

        require(success, "TRANSFER_FAILED");
    }

    function safeApprove(
        ERC20 token,
        address to,
        uint256 amount
    ) internal {
        bool success;

        /// @solidity memory-safe-assembly
        assembly {
            // Get a pointer to some free memory.
            let freeMemoryPointer := mload(0x40)

            // Write the abi-encoded calldata into memory, beginning with the function selector.
            mstore(freeMemoryPointer, 0x095ea7b300000000000000000000000000000000000000000000000000000000)
            mstore(add(freeMemoryPointer, 4), and(to, 0xffffffffffffffffffffffffffffffffffffffff)) // Append and mask the "to" argument.
            mstore(add(freeMemoryPointer, 36), amount) // Append the "amount" argument. Masking not required as it's a full 32 byte type.

            success := and(
                // Set success to whether the call reverted, if not we check it either
                // returned exactly 1 (can't just be non-zero data), or had no return data.
                or(and(eq(mload(0), 1), gt(returndatasize(), 31)), iszero(returndatasize())),
                // We use 68 because the length of our calldata totals up like so: 4 + 32 * 2.
                // We use 0 and 32 to copy up to 32 bytes of return data into the scratch space.
                // Counterintuitively, this call must be positioned second to the or() call in the
                // surrounding and() call or else returndatasize() will be zero during the computation.
                call(gas(), token, 0, freeMemoryPointer, 68, 0, 32)
            )
        }

        require(success, "APPROVE_FAILED");
    }
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;

/// @notice Arithmetic library with operations for fixed-point numbers.
/// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/utils/FixedPointMathLib.sol)
/// @author Inspired by USM (https://github.com/usmfum/USM/blob/master/contracts/WadMath.sol)
library FixedPointMathLib {
    /*//////////////////////////////////////////////////////////////
                    SIMPLIFIED FIXED POINT OPERATIONS
    //////////////////////////////////////////////////////////////*/

    uint256 internal constant MAX_UINT256 = 2**256 - 1;

    uint256 internal constant WAD = 1e18; // The scalar of ETH and most ERC20s.

    function mulWadDown(uint256 x, uint256 y) internal pure returns (uint256) {
        return mulDivDown(x, y, WAD); // Equivalent to (x * y) / WAD rounded down.
    }

    function mulWadUp(uint256 x, uint256 y) internal pure returns (uint256) {
        return mulDivUp(x, y, WAD); // Equivalent to (x * y) / WAD rounded up.
    }

    function divWadDown(uint256 x, uint256 y) internal pure returns (uint256) {
        return mulDivDown(x, WAD, y); // Equivalent to (x * WAD) / y rounded down.
    }

    function divWadUp(uint256 x, uint256 y) internal pure returns (uint256) {
        return mulDivUp(x, WAD, y); // Equivalent to (x * WAD) / y rounded up.
    }

    /*//////////////////////////////////////////////////////////////
                    LOW LEVEL FIXED POINT OPERATIONS
    //////////////////////////////////////////////////////////////*/

    function mulDivDown(
        uint256 x,
        uint256 y,
        uint256 denominator
    ) internal pure returns (uint256 z) {
        /// @solidity memory-safe-assembly
        assembly {
            // Equivalent to require(denominator != 0 && (y == 0 || x <= type(uint256).max / y))
            if iszero(mul(denominator, iszero(mul(y, gt(x, div(MAX_UINT256, y)))))) {
                revert(0, 0)
            }

            // Divide x * y by the denominator.
            z := div(mul(x, y), denominator)
        }
    }

    function mulDivUp(
        uint256 x,
        uint256 y,
        uint256 denominator
    ) internal pure returns (uint256 z) {
        /// @solidity memory-safe-assembly
        assembly {
            // Equivalent to require(denominator != 0 && (y == 0 || x <= type(uint256).max / y))
            if iszero(mul(denominator, iszero(mul(y, gt(x, div(MAX_UINT256, y)))))) {
                revert(0, 0)
            }

            // If x * y modulo the denominator is strictly greater than 0,
            // 1 is added to round up the division of x * y by the denominator.
            z := add(gt(mod(mul(x, y), denominator), 0), div(mul(x, y), denominator))
        }
    }

    function rpow(
        uint256 x,
        uint256 n,
        uint256 scalar
    ) internal pure returns (uint256 z) {
        /// @solidity memory-safe-assembly
        assembly {
            switch x
            case 0 {
                switch n
                case 0 {
                    // 0 ** 0 = 1
                    z := scalar
                }
                default {
                    // 0 ** n = 0
                    z := 0
                }
            }
            default {
                switch mod(n, 2)
                case 0 {
                    // If n is even, store scalar in z for now.
                    z := scalar
                }
                default {
                    // If n is odd, store x in z for now.
                    z := x
                }

                // Shifting right by 1 is like dividing by 2.
                let half := shr(1, scalar)

                for {
                    // Shift n right by 1 before looping to halve it.
                    n := shr(1, n)
                } n {
                    // Shift n right by 1 each iteration to halve it.
                    n := shr(1, n)
                } {
                    // Revert immediately if x ** 2 would overflow.
                    // Equivalent to iszero(eq(div(xx, x), x)) here.
                    if shr(128, x) {
                        revert(0, 0)
                    }

                    // Store x squared.
                    let xx := mul(x, x)

                    // Round to the nearest number.
                    let xxRound := add(xx, half)

                    // Revert if xx + half overflowed.
                    if lt(xxRound, xx) {
                        revert(0, 0)
                    }

                    // Set x to scaled xxRound.
                    x := div(xxRound, scalar)

                    // If n is even:
                    if mod(n, 2) {
                        // Compute z * x.
                        let zx := mul(z, x)

                        // If z * x overflowed:
                        if iszero(eq(div(zx, x), z)) {
                            // Revert if x is non-zero.
                            if iszero(iszero(x)) {
                                revert(0, 0)
                            }
                        }

                        // Round to the nearest number.
                        let zxRound := add(zx, half)

                        // Revert if zx + half overflowed.
                        if lt(zxRound, zx) {
                            revert(0, 0)
                        }

                        // Return properly scaled zxRound.
                        z := div(zxRound, scalar)
                    }
                }
            }
        }
    }

    /*//////////////////////////////////////////////////////////////
                        GENERAL NUMBER UTILITIES
    //////////////////////////////////////////////////////////////*/

    function sqrt(uint256 x) internal pure returns (uint256 z) {
        /// @solidity memory-safe-assembly
        assembly {
            let y := x // We start y at x, which will help us make our initial estimate.

            z := 181 // The "correct" value is 1, but this saves a multiplication later.

            // This segment is to get a reasonable initial estimate for the Babylonian method. With a bad
            // start, the correct # of bits increases ~linearly each iteration instead of ~quadratically.

            // We check y >= 2^(k + 8) but shift right by k bits
            // each branch to ensure that if x >= 256, then y >= 256.
            if iszero(lt(y, 0x10000000000000000000000000000000000)) {
                y := shr(128, y)
                z := shl(64, z)
            }
            if iszero(lt(y, 0x1000000000000000000)) {
                y := shr(64, y)
                z := shl(32, z)
            }
            if iszero(lt(y, 0x10000000000)) {
                y := shr(32, y)
                z := shl(16, z)
            }
            if iszero(lt(y, 0x1000000)) {
                y := shr(16, y)
                z := shl(8, z)
            }

            // Goal was to get z*z*y within a small factor of x. More iterations could
            // get y in a tighter range. Currently, we will have y in [256, 256*2^16).
            // We ensured y >= 256 so that the relative difference between y and y+1 is small.
            // That's not possible if x < 256 but we can just verify those cases exhaustively.

            // Now, z*z*y <= x < z*z*(y+1), and y <= 2^(16+8), and either y >= 256, or x < 256.
            // Correctness can be checked exhaustively for x < 256, so we assume y >= 256.
            // Then z*sqrt(y) is within sqrt(257)/sqrt(256) of sqrt(x), or about 20bps.

            // For s in the range [1/256, 256], the estimate f(s) = (181/1024) * (s+1) is in the range
            // (1/2.84 * sqrt(s), 2.84 * sqrt(s)), with largest error when s = 1 and when s = 256 or 1/256.

            // Since y is in [256, 256*2^16), let a = y/65536, so that a is in [1/256, 256). Then we can estimate
            // sqrt(y) using sqrt(65536) * 181/1024 * (a + 1) = 181/4 * (y + 65536)/65536 = 181 * (y + 65536)/2^18.

            // There is no overflow risk here since y < 2^136 after the first branch above.
            z := shr(18, mul(z, add(y, 65536))) // A mul() is saved from starting z at 181.

            // Given the worst case multiplicative error of 2.84 above, 7 iterations should be enough.
            z := shr(1, add(z, div(x, z)))
            z := shr(1, add(z, div(x, z)))
            z := shr(1, add(z, div(x, z)))
            z := shr(1, add(z, div(x, z)))
            z := shr(1, add(z, div(x, z)))
            z := shr(1, add(z, div(x, z)))
            z := shr(1, add(z, div(x, z)))

            // If x+1 is a perfect square, the Babylonian method cycles between
            // floor(sqrt(x)) and ceil(sqrt(x)). This statement ensures we return floor.
            // See: https://en.wikipedia.org/wiki/Integer_square_root#Using_only_integer_division
            // Since the ceil is rare, we save gas on the assignment and repeat division in the rare case.
            // If you don't care whether the floor or ceil square root is returned, you can remove this statement.
            z := sub(z, lt(div(x, z), z))
        }
    }

    function unsafeMod(uint256 x, uint256 y) internal pure returns (uint256 z) {
        /// @solidity memory-safe-assembly
        assembly {
            // Mod x by y. Note this will return
            // 0 instead of reverting if y is zero.
            z := mod(x, y)
        }
    }

    function unsafeDiv(uint256 x, uint256 y) internal pure returns (uint256 r) {
        /// @solidity memory-safe-assembly
        assembly {
            // Divide x by y. Note this will return
            // 0 instead of reverting if y is zero.
            r := div(x, y)
        }
    }

    function unsafeDivUp(uint256 x, uint256 y) internal pure returns (uint256 z) {
        /// @solidity memory-safe-assembly
        assembly {
            // Add 1 to x * y if x % y > 0. Note this will
            // return 0 instead of reverting if y is zero.
            z := add(gt(mod(x, y), 0), div(x, y))
        }
    }
}

{
  "remappings": [
    "@openzeppelin/contracts/=lib/openzeppelin-contracts/contracts/",
    "ds-test/=lib/solmate/lib/ds-test/src/",
    "erc4626-tests/=lib/openzeppelin-contracts/lib/erc4626-tests/",
    "forge-std/=lib/forge-std/src/",
    "openzeppelin-contracts/=lib/openzeppelin-contracts/",
    "solmate/=lib/solmate/src/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "ipfs",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "shanghai",
  "viaIR": false,
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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00000000000000000000000041d5d79431a913c4ae7d69a668ecdfe5ff9dfb68000000000000000000000000b516247596ca36bf32876199fbdcad6b3322330b000000000000000000000000926df14a23be491164dcf93f4c468a50ef659d5b0000000000000000000000004b6c63e6a94ef26e2df60b89372db2d8e211f1b700000000000000000000000000000000000000000000021e19e0c9bab240000000000000000000000000000000007dd08b930c64a15497342287480000000000

-----Decoded View---------------
Arg [0] : _inv (address): 0x41D5D79431A913C4aE7d69a668ecdfE5fF9DFB68
Arg [1] : _invMarket (address): 0xb516247596Ca36bf32876199FBdCaD6B3322330B
Arg [2] : _gov (address): 0x926dF14a23BE491164dCF93f4c468A50ef659D5B
Arg [3] : _guardian (address): 0x4b6c63E6a94ef26E2dF60b89372db2d8e211F1B7
Arg [4] : _depositLimit (uint256): 10000000000000000000000
Arg [5] : _K (uint256): 10960000000000000000000000000000000000000000

-----Encoded View---------------
6 Constructor Arguments found :
Arg [0] : 00000000000000000000000041d5d79431a913c4ae7d69a668ecdfe5ff9dfb68
Arg [1] : 000000000000000000000000b516247596ca36bf32876199fbdcad6b3322330b
Arg [2] : 000000000000000000000000926df14a23be491164dcf93f4c468a50ef659d5b
Arg [3] : 0000000000000000000000004b6c63e6a94ef26e2df60b89372db2d8e211f1b7
Arg [4] : 00000000000000000000000000000000000000000000021e19e0c9bab2400000
Arg [5] : 00000000000000000000000000007dd08b930c64a15497342287480000000000