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

import {BaseStrategy, ERC20} from "https://github.com/yearn/tokenized-strategy/blob/v3.0.3/src/BaseStrategy.sol";

import {Math} from "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v4.9.5/contracts/utils/math/Math.sol";
import {SafeERC20} from "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v4.9.5/contracts/token/ERC20/utils/SafeERC20.sol";

import {IAToken} from "./interfaces/Aave/V3/IAtoken.sol";
import {IStakedAave} from "./interfaces/Aave/V3/IStakedAave.sol";
import {IPool} from "./interfaces/Aave/V3/IPool.sol";
import {IRewardsController} from "./interfaces/Aave/V3/IRewardsController.sol";

// Swappers
import {UniswapV3Swapper} from "https://github.com/yearn/tokenized-strategy-periphery/src/swappers/UniswapV3Swapper.sol";
import {AuctionSwapper, Auction} from "https://github.com/yearn/tokenized-strategy-periphery/src/swappers/AuctionSwapper.sol";

contract AaveV3Lender is BaseStrategy, UniswapV3Swapper, AuctionSwapper {
    using SafeERC20 for ERC20;

    IStakedAave internal constant stkAave =
        IStakedAave(0x4da27a545c0c5B758a6BA100e3a049001de870f5);
    address internal constant AAVE =
        address(0x7Fc66500c84A76Ad7e9c93437bFc5Ac33E2DDaE9);

    // To get the Supply cap of an asset.
    uint256 internal constant SUPPLY_CAP_MASK = 0xFFFFFFFFFFFFFFFFFFFFFFFFFF000000000FFFFFFFFFFFFFFFFFFFFFFFFFFFFF; // prettier-ignore
    uint256 internal constant VIRTUAL_ACC_ACTIVE_MASK = 0xEFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF; // prettier-ignore
    uint256 internal constant SUPPLY_CAP_START_BIT_POSITION = 116;
    uint256 internal immutable decimals;

    // The pool to deposit and withdraw through.
    IPool public immutable lendingPool;

    // The a Token specific rewards contract for claiming rewards.
    IRewardsController public immutable rewardsController;

    // The token that we get in return for deposits.
    IAToken public immutable aToken;

    // Local variable if the pool uses virtual accounting.
    bool internal virtualAccounting;

    // Bool to decide to try and claim rewards. Defaults to False.
    bool public claimRewards;

    // If rewards should be sold through Auctions.
    bool public useAuction = true;

    // Mapping to be set by management for any reward tokens.
    // This can be used to set different mins for different tokens
    // or to set to uin256.max if selling a reward token is reverting
    // to allow for reports to still work properly.
    mapping(address => uint256) public minAmountToSellMapping;

    constructor(
        address _asset,
        string memory _name,
        address _lendingPool,
        address _router,
        address _base
    ) BaseStrategy(_asset, _name) {
        lendingPool = IPool(_lendingPool);

        // Set the aToken based on the asset we are using.
        aToken = IAToken(lendingPool.getReserveData(_asset).aTokenAddress);

        // Make sure its a real token.
        require(address(aToken) != address(0), "!aToken");

        // Get aToken decimals for supply caps.
        decimals = ERC20(address(aToken)).decimals();

        // Set the rewards controller
        rewardsController = aToken.getIncentivesController();

        // Set if using the virtual accounting.
        setIsVirtualAccActive();

        // Make approve the lending pool for cheaper deposits.
        asset.safeApprove(address(lendingPool), type(uint256).max);

        // Set uni swapper values
        // We will use the minAmountToSell mapping instead.
        minAmountToSell = 0;
        router = _router;
        base = _base;
    }

    /**
     * @notice Set the uni fees for swaps.
     * @dev External function available to management to set
     * the fees used in the `UniswapV3Swapper.
     *
     * Any incentivized tokens will need a fee to be set for each
     * reward token that it wishes to swap on reports.
     *
     * @param _token0 The first token of the pair.
     * @param _token1 The second token of the pair.
     * @param _fee The fee to be used for the pair.
     */
    function setUniFees(
        address _token0,
        address _token1,
        uint24 _fee
    ) external onlyManagement {
        _setUniFees(_token0, _token1, _fee);
    }

    /*//////////////////////////////////////////////////////////////
                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 override {
        lendingPool.supply(address(asset), _amount, address(this), 0);
    }

    /**
     * @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.
     *
     * 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 override {
        lendingPool.withdraw(
            address(asset),
            Math.min(aToken.balanceOf(address(this)), _amount),
            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
        override
        returns (uint256 _totalAssets)
    {
        if (claimRewards) {
            // Claim and sell any rewards to `asset`.
            _claimAndSellRewards();
        }

        _totalAssets = aToken.balanceOf(address(this)) + balanceOfAsset();
    }

    function balanceOfAsset() public view returns (uint256) {
        return asset.balanceOf(address(this));
    }

    /**
     * @notice Used to claim any pending rewards and sell them to asset.
     */
    function _claimAndSellRewards() internal {
        // Claim any pending stkAave.
        _redeemAave();

        //claim all rewards
        address[] memory assets = new address[](1);
        assets[0] = address(aToken);
        (address[] memory rewardsList, ) = rewardsController
            .claimAllRewardsToSelf(assets);

        // Start cooldown on any new stkAave.
        _harvestStkAave();

        // If using the Auction contract we are done.
        if (useAuction) return;

        // Else swap as much as possible back to asset through uni.
        address token;
        for (uint256 i = 0; i < rewardsList.length; ++i) {
            token = rewardsList[i];

            if (token == address(asset) || token == address(aToken)) {
                continue;
            } else if (token == address(stkAave)) {
                // We swap Aave => asset
                token = AAVE;
            }

            uint256 balance = ERC20(token).balanceOf(address(this));

            if (balance > minAmountToSellMapping[token]) {
                _swapFrom(token, address(asset), balance, 0);
            }
        }
    }

    function _redeemAave() internal {
        if (!checkCooldown()) {
            return;
        }

        uint256 stkAaveBalance = ERC20(address(stkAave)).balanceOf(
            address(this)
        );

        if (stkAaveBalance > 0) {
            stkAave.redeem(address(this), stkAaveBalance);
        }
    }

    function checkCooldown() public view returns (bool) {
        if (block.chainid != 1) return false;

        uint256 cooldownStartTimestamp = IStakedAave(stkAave)
            .stakersCooldowns(address(this))
            .timestamp;

        if (cooldownStartTimestamp == 0) return false;

        uint256 cooldownSeconds = IStakedAave(stkAave).getCooldownSeconds();
        uint256 UNSTAKE_WINDOW = IStakedAave(stkAave).UNSTAKE_WINDOW();
        if (block.timestamp >= cooldownStartTimestamp + cooldownSeconds) {
            return
                block.timestamp - (cooldownStartTimestamp + cooldownSeconds) <=
                UNSTAKE_WINDOW;
        } else {
            return false;
        }
    }

    function _harvestStkAave() internal {
        if (block.chainid != 1) return;

        // request start of cooldown period
        if (ERC20(address(stkAave)).balanceOf(address(this)) > 0) {
            stkAave.cooldown();
        }
    }

    function manualRedeemAave() external onlyKeepers {
        _redeemAave();
    }

    /**
     * @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 override returns (uint256) {
        // Get the data configuration bitmap.
        uint256 _data = lendingPool
            .getReserveData(address(asset))
            .configuration
            .data;

        // Cannot deposit when paused or frozen.
        if (_isPaused(_data) || _isFrozen(_data)) return 0;

        uint256 supplyCap = _getSupplyCap(_data);

        // If we have no supply cap.
        if (supplyCap == 0) return type(uint256).max;

        // Supply plus any already idle funds.
        uint256 supply = aToken.totalSupply() + asset.balanceOf(address(this));

        // If we already hit the cap.
        if (supplyCap <= supply) return 0;

        // Return the remaining room.
        unchecked {
            return supplyCap - supply;
        }
    }

    /**
     * @notice Gets the supply cap of the reserve
     * @return The supply cap
     */
    function getSupplyCap() public view returns (uint256) {
        _getSupplyCap(
            lendingPool.getReserveData(address(asset)).configuration.data
        );
    }

    /**
     * @dev Given the data configuration returns the supply cap.
     */
    function _getSupplyCap(uint256 _data) internal view returns (uint256) {
        // Get out the supply cap for the asset.
        uint256 cap = (_data & ~SUPPLY_CAP_MASK) >>
            SUPPLY_CAP_START_BIT_POSITION;
        // Adjust to the correct decimals.
        return cap * (10 ** decimals);
    }

    /**
     * @dev Paused flag is at the 60th bit
     */
    function _isPaused(uint256 _data) internal view returns (bool) {
        // Create a mask with only the 60th bit set
        uint256 mask = 1 << 60; // Bitwise left shift by 59 positions

        // Perform bitwise AND operation to check if the 60th bit is 0.
        return (_data & mask) != 0;
    }

    /**
     * @dev Frozen flag is at the 57th bit.
     */
    function _isFrozen(uint256 _data) internal view returns (bool) {
        // Create a mask with only the 57th bit set
        uint256 mask = 1 << 57; // Bitwise left shift by 56 positions

        // Perform bitwise AND operation to check if the 57th bit 0.
        return (_data & mask) != 0;
    }

    /**
     * @dev Open function to set the local bool corresponding to
     *   if the pool is using the virtual accounting method.
     */
    function setIsVirtualAccActive() public {
        virtualAccounting =
            (lendingPool
                .getReserveDataExtended(address(asset))
                .configuration
                .data & ~VIRTUAL_ACC_ACTIVE_MASK) !=
            0;
    }

    /**
     * @dev Gets the liquid balance that can be withdrawn from the pool
     */
    function _getLiquidity() internal view returns (uint256) {
        if (virtualAccounting) {
            return lendingPool.getVirtualUnderlyingBalance(address(asset));
        } else {
            return asset.balanceOf(address(aToken));
        }
    }

    /**
     * @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 override returns (uint256) {
        uint256 liquidity;

        // IF pool is not paused
        if (
            !_isPaused(
                lendingPool.getReserveData(address(asset)).configuration.data
            )
        ) {
            // Get the tracked virtual balance
            liquidity = _getLiquidity();
        }
        return balanceOfAsset() + liquidity;
    }

    /**
     * @notice Set the `minAmountToSellMapping` for a specific `_token`.
     * @dev This can be used by management to adjust wether or not the
     * _claimAndSellRewards() function will attempt to sell a specific
     * reward token. This can be used if liquidity is to low, amounts
     * are to low or any other reason that may cause reverts.
     *
     * @param _token The address of the token to adjust.
     * @param _amount Min required amount to sell.
     */
    function setMinAmountToSellMapping(
        address _token,
        uint256 _amount
    ) external onlyManagement {
        minAmountToSellMapping[_token] = _amount;
    }

    /**
     * @notice Set wether or not the strategy should claim and sell rewards.
     * @param _bool Wether or not rewards should be claimed and sold
     */
    function setClaimRewards(bool _bool) external onlyManagement {
        claimRewards = _bool;
    }

    ///////////// DUTCH AUCTION FUNCTIONS \\\\\\\\\\\\\\\\\\

    function setAuction(address _auction) external onlyEmergencyAuthorized {
        if (_auction != address(0)) {
            require(Auction(_auction).want() == address(asset), "wrong want");
        }
        auction = _auction;
    }

    function _auctionKicked(
        address _token
    ) internal virtual override returns (uint256 _kicked) {
        require(_token != address(asset), "asset");
        _kicked = super._auctionKicked(_token);
        require(_kicked >= minAmountToSellMapping[_token], "too little");
    }

    /**
     * @notice Set if tokens should be sold through the dutch auction contract.
     */
    function setUseAuction(bool _useAuction) external onlyManagement {
        useAuction = _useAuction;
    }

    /**
     * @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 override {
        _freeFunds(_amount);
    }
}

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

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

import {AuctionFactory, Auction} from "../Auctions/AuctionFactory.sol";

/**
 *   @title AuctionSwapper
 *   @author yearn.fi
 *   @dev Helper contract for a strategy to use dutch auctions for token sales.
 *
 *   This contract is meant to be inherited by a V3 strategy in order
 *   to easily integrate dutch auctions into a contract for token swaps.
 *
 *   The strategist will need to implement a way to call `_enableAuction`
 *   for an token pair they want to use, or a setter to manually set the
 *   `auction` contract.
 *
 *   The contract comes with all of the needed function to act as a `hook`
 *   contract for the specific auction contract with the ability to override
 *   any of the functions to implement custom hooks.
 *
 *   NOTE: If any hooks are not desired, the strategist should also
 *   implement a way to call the {setHookFlags} on the auction contract
 *   to avoid unnecessary gas for unused functions.
 */
contract AuctionSwapper {
    using SafeERC20 for ERC20;

    modifier onlyAuction() {
        _isAuction();
        _;
    }

    /**
     * @dev Check the caller is the auction contract for hooks.
     */
    function _isAuction() internal view virtual {
        require(msg.sender == auction, "!auction");
    }

    /// @notice The pre-deployed Auction factory for cloning.
    address public constant auctionFactory =
        0xE6aB098E8582178A76DC80d55ca304d1Dec11AD8;

    /// @notice Address of the specific Auction this strategy uses.
    address public auction;

    /*//////////////////////////////////////////////////////////////
                    AUCTION STARTING AND STOPPING
    //////////////////////////////////////////////////////////////*/

    function _enableAuction(
        address _from,
        address _want
    ) internal virtual returns (bytes32) {
        return _enableAuction(_from, _want, 1 days, 3 days, 1e6);
    }

    /**
     * @dev Used to enable a new Auction to sell `_from` to `_want`.
     *   If this is the first auction enabled it will deploy a new `auction`
     *   contract to use from the factory.
     *
     * NOTE: This only supports one `_want` token per strategy.
     *
     * @param _from Token to sell
     * @param _want Token to buy.
     * @return .The auction ID.
     */
    function _enableAuction(
        address _from,
        address _want,
        uint256 _auctionLength,
        uint256 _auctionCooldown,
        uint256 _startingPrice
    ) internal virtual returns (bytes32) {
        address _auction = auction;

        // If this is the first auction.
        if (_auction == address(0)) {
            // Deploy a new auction
            _auction = AuctionFactory(auctionFactory).createNewAuction(
                _want,
                address(this),
                address(this),
                _auctionLength,
                _auctionCooldown,
                _startingPrice
            );
            // Store it for future use.
            auction = _auction;
        } else {
            // Can only use one `want` per auction contract.
            require(Auction(_auction).want() == _want, "wrong want");
        }

        // Enable new auction for `_from` token.
        return Auction(_auction).enable(_from);
    }

    /**
     * @dev Disable an auction for a given token.
     * @param _from The token that was being sold.
     */
    function _disableAuction(address _from) internal virtual {
        Auction(auction).disable(_from);
    }

    /*//////////////////////////////////////////////////////////////
                        OPTIONAL AUCTION HOOKS
    //////////////////////////////////////////////////////////////*/

    /**
     * @notice Return how much `_token` could currently be kicked into auction.
     * @dev This can be overridden by a strategist to implement custom logic.
     * @param _token Address of the `_from` token.
     * @return . The amount of `_token` ready to be auctioned off.
     */
    function kickable(address _token) public view virtual returns (uint256) {
        return ERC20(_token).balanceOf(address(this));
    }

    /**
     * @dev To override if something other than just sending the loose balance
     *  of `_token` to the auction is desired, such as accruing and and claiming rewards.
     *
     * @param _token Address of the token being auctioned off
     */
    function _auctionKicked(address _token) internal virtual returns (uint256) {
        // Send any loose balance to the auction.
        uint256 balance = ERC20(_token).balanceOf(address(this));
        if (balance != 0) ERC20(_token).safeTransfer(auction, balance);
        return ERC20(_token).balanceOf(auction);
    }

    /**
     * @dev To override if something needs to be done before a take is completed.
     *   This can be used if the auctioned token only will be freed up when a `take`
     *   occurs.
     * @param _token Address of the token being taken.
     * @param _amountToTake Amount of `_token` needed.
     * @param _amountToPay Amount of `want` that will be payed.
     */
    function _preTake(
        address _token,
        uint256 _amountToTake,
        uint256 _amountToPay
    ) internal virtual {}

    /**
     * @dev To override if a post take action is desired.
     *
     * This could be used to re-deploy the bought token back into the yield source,
     * or in conjunction with {_preTake} to check that the price sold at was within
     * some allowed range.
     *
     * @param _token Address of the token that the strategy was sent.
     * @param _amountTaken Amount of the from token taken.
     * @param _amountPayed Amount of `_token` that was sent to the strategy.
     */
    function _postTake(
        address _token,
        uint256 _amountTaken,
        uint256 _amountPayed
    ) internal virtual {}

    /*//////////////////////////////////////////////////////////////
                            AUCTION HOOKS
    //////////////////////////////////////////////////////////////*/

    /**
     * @notice External hook for the auction to call during a `kick`.
     * @dev Will call the internal version for the strategist to override.
     * @param _token Token being kicked into auction.
     * @return . The amount of `_token` to be auctioned off.
     */
    function auctionKicked(
        address _token
    ) external virtual onlyAuction returns (uint256) {
        return _auctionKicked(_token);
    }

    /**
     * @notice External hook for the auction to call before a `take`.
     * @dev Will call the internal version for the strategist to override.
     * @param _token Token being taken in the auction.
     * @param _amountToTake The amount of `_token` to be sent to the taker.
     * @param _amountToPay Amount of `want` that will be payed.
     */
    function preTake(
        address _token,
        uint256 _amountToTake,
        uint256 _amountToPay
    ) external virtual onlyAuction {
        _preTake(_token, _amountToTake, _amountToPay);
    }

    /**
     * @notice External hook for the auction to call after a `take` completed.
     * @dev Will call the internal version for the strategist to override.
     * @param _token The `want` token that was sent to the strategy.
     * @param _amountTaken Amount of the from token taken.
     * @param _amountPayed Amount of `_token` that was sent to the strategy.
     */
    function postTake(
        address _token,
        uint256 _amountTaken,
        uint256 _amountPayed
    ) external virtual onlyAuction {
        _postTake(_token, _amountTaken, _amountPayed);
    }
}

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

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

import {ISwapRouter} from "../interfaces/Uniswap/V3/ISwapRouter.sol";

/**
 *   @title UniswapV3Swapper
 *   @author Yearn.finance
 *   @dev This is a simple contract that can be inherited by any tokenized
 *   strategy that would like to use Uniswap V3 for swaps. It hold all needed
 *   logic to perform both exact input and exact output swaps.
 *
 *   The global address variables default to the ETH mainnet addresses but
 *   remain settable by the inheriting contract to allow for customization
 *   based on needs or chain its used on.
 *
 *   The only variables that are required to be set are the specific fees
 *   for each token pair. The inheriting contract can use the {_setUniFees}
 *   function to easily set this for any token pairs needed.
 */
contract UniswapV3Swapper {
    using SafeERC20 for ERC20;

    // Optional Variable to be set to not sell dust.
    uint256 public minAmountToSell;
    // Defaults to WETH on mainnet.
    address public base = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;

    // Defaults to Uniswap V3 router on mainnet.
    address public router = 0xE592427A0AEce92De3Edee1F18E0157C05861564;

    // Fees for the Uni V3 pools. Each fee should get set each way in
    // the mapping so no matter the direction the correct fee will get
    // returned for any two tokens.
    mapping(address => mapping(address => uint24)) public uniFees;

    /**
     * @dev All fess will default to 0 on creation. A strategist will need
     * To set the mapping for the tokens expected to swap. This function
     * is to help set the mapping. It can be called internally during
     * initialization, through permissioned functions etc.
     */
    function _setUniFees(
        address _token0,
        address _token1,
        uint24 _fee
    ) internal virtual {
        uniFees[_token0][_token1] = _fee;
        uniFees[_token1][_token0] = _fee;
    }

    /**
     * @dev Used to swap a specific amount of `_from` to `_to`.
     * This will check and handle all allowances as well as not swapping
     * unless `_amountIn` is greater than the set `_minAmountOut`
     *
     * If one of the tokens matches with the `base` token it will do only
     * one jump, otherwise will do two jumps.
     *
     * The corresponding uniFees for each token pair will need to be set
     * other wise this function will revert.
     *
     * @param _from The token we are swapping from.
     * @param _to The token we are swapping to.
     * @param _amountIn The amount of `_from` we will swap.
     * @param _minAmountOut The min of `_to` to get out.
     * @return _amountOut The actual amount of `_to` that was swapped to
     */
    function _swapFrom(
        address _from,
        address _to,
        uint256 _amountIn,
        uint256 _minAmountOut
    ) internal virtual returns (uint256 _amountOut) {
        if (_amountIn > minAmountToSell) {
            _checkAllowance(router, _from, _amountIn);
            if (_from == base || _to == base) {
                ISwapRouter.ExactInputSingleParams memory params = ISwapRouter
                    .ExactInputSingleParams(
                        _from, // tokenIn
                        _to, // tokenOut
                        uniFees[_from][_to], // from-to fee
                        address(this), // recipient
                        block.timestamp, // deadline
                        _amountIn, // amountIn
                        _minAmountOut, // amountOut
                        0 // sqrtPriceLimitX96
                    );

                _amountOut = ISwapRouter(router).exactInputSingle(params);
            } else {
                bytes memory path = abi.encodePacked(
                    _from, // tokenIn
                    uniFees[_from][base], // from-base fee
                    base, // base token
                    uniFees[base][_to], // base-to fee
                    _to // tokenOut
                );

                _amountOut = ISwapRouter(router).exactInput(
                    ISwapRouter.ExactInputParams(
                        path,
                        address(this),
                        block.timestamp,
                        _amountIn,
                        _minAmountOut
                    )
                );
            }
        }
    }

    /**
     * @dev Used to swap a specific amount of `_to` from `_from` unless
     * it takes more than `_maxAmountFrom`.
     *
     * This will check and handle all allowances as well as not swapping
     * unless `_maxAmountFrom` is greater than the set `minAmountToSell`
     *
     * If one of the tokens matches with the `base` token it will do only
     * one jump, otherwise will do two jumps.
     *
     * The corresponding uniFees for each token pair will need to be set
     * other wise this function will revert.
     *
     * @param _from The token we are swapping from.
     * @param _to The token we are swapping to.
     * @param _amountTo The amount of `_to` we need out.
     * @param _maxAmountFrom The max of `_from` we will swap.
     * @return _amountIn The actual amount of `_from` swapped.
     */
    function _swapTo(
        address _from,
        address _to,
        uint256 _amountTo,
        uint256 _maxAmountFrom
    ) internal virtual returns (uint256 _amountIn) {
        if (_maxAmountFrom > minAmountToSell) {
            _checkAllowance(router, _from, _maxAmountFrom);
            if (_from == base || _to == base) {
                ISwapRouter.ExactOutputSingleParams memory params = ISwapRouter
                    .ExactOutputSingleParams(
                        _from, // tokenIn
                        _to, // tokenOut
                        uniFees[_from][_to], // from-to fee
                        address(this), // recipient
                        block.timestamp, // deadline
                        _amountTo, // amountOut
                        _maxAmountFrom, // maxAmountIn
                        0 // sqrtPriceLimitX96
                    );

                _amountIn = ISwapRouter(router).exactOutputSingle(params);
            } else {
                bytes memory path = abi.encodePacked(
                    _to,
                    uniFees[base][_to], // base-to fee
                    base,
                    uniFees[_from][base], // from-base fee
                    _from
                );

                _amountIn = ISwapRouter(router).exactOutput(
                    ISwapRouter.ExactOutputParams(
                        path,
                        address(this),
                        block.timestamp,
                        _amountTo, // How much we want out
                        _maxAmountFrom
                    )
                );
            }
        }
    }

    /**
     * @dev Internal safe function to make sure the contract you want to
     * interact with has enough allowance to pull the desired tokens.
     *
     * @param _contract The address of the contract that will move the token.
     * @param _token The ERC-20 token that will be getting spent.
     * @param _amount The amount of `_token` to be spent.
     */
    function _checkAllowance(
        address _contract,
        address _token,
        uint256 _amount
    ) internal virtual {
        if (ERC20(_token).allowance(address(this), _contract) < _amount) {
            ERC20(_token).safeApprove(_contract, 0);
            ERC20(_token).safeApprove(_contract, _amount);
        }
    }
}

// SPDX-License-Identifier: agpl-3.0
pragma solidity >=0.6.12;

/**
 * @title IRewardsDistributor
 * @author Aave
 * @notice Defines the basic interface for a Rewards Distributor.
 */
interface IRewardsDistributor {
    /**
     * @dev Emitted when the configuration of the rewards of an asset is updated.
     * @param asset The address of the incentivized asset
     * @param reward The address of the reward token
     * @param oldEmission The old emissions per second value of the reward distribution
     * @param newEmission The new emissions per second value of the reward distribution
     * @param oldDistributionEnd The old end timestamp of the reward distribution
     * @param newDistributionEnd The new end timestamp of the reward distribution
     * @param assetIndex The index of the asset distribution
     */
    event AssetConfigUpdated(
        address indexed asset,
        address indexed reward,
        uint256 oldEmission,
        uint256 newEmission,
        uint256 oldDistributionEnd,
        uint256 newDistributionEnd,
        uint256 assetIndex
    );

    /**
     * @dev Emitted when rewards of an asset are accrued on behalf of a user.
     * @param asset The address of the incentivized asset
     * @param reward The address of the reward token
     * @param user The address of the user that rewards are accrued on behalf of
     * @param assetIndex The index of the asset distribution
     * @param userIndex The index of the asset distribution on behalf of the user
     * @param rewardsAccrued The amount of rewards accrued
     */
    event Accrued(
        address indexed asset,
        address indexed reward,
        address indexed user,
        uint256 assetIndex,
        uint256 userIndex,
        uint256 rewardsAccrued
    );

    /**
     * @dev Emitted when the emission manager address is updated.
     * @param oldEmissionManager The address of the old emission manager
     * @param newEmissionManager The address of the new emission manager
     */
    event EmissionManagerUpdated(
        address indexed oldEmissionManager,
        address indexed newEmissionManager
    );

    /**
     * @dev Sets the end date for the distribution
     * @param asset The asset to incentivize
     * @param reward The reward token that incentives the asset
     * @param newDistributionEnd The end date of the incentivization, in unix time format
     **/
    function setDistributionEnd(
        address asset,
        address reward,
        uint32 newDistributionEnd
    ) external;

    /**
     * @dev Sets the emission per second of a set of reward distributions
     * @param asset The asset is being incentivized
     * @param rewards List of reward addresses are being distributed
     * @param newEmissionsPerSecond List of new reward emissions per second
     */
    function setEmissionPerSecond(
        address asset,
        address[] calldata rewards,
        uint88[] calldata newEmissionsPerSecond
    ) external;

    /**
     * @dev Gets the end date for the distribution
     * @param asset The incentivized asset
     * @param reward The reward token of the incentivized asset
     * @return The timestamp with the end of the distribution, in unix time format
     **/
    function getDistributionEnd(
        address asset,
        address reward
    ) external view returns (uint256);

    /**
     * @dev Returns the index of a user on a reward distribution
     * @param user Address of the user
     * @param asset The incentivized asset
     * @param reward The reward token of the incentivized asset
     * @return The current user asset index, not including new distributions
     **/
    function getUserAssetIndex(
        address user,
        address asset,
        address reward
    ) external view returns (uint256);

    /**
     * @dev Returns the configuration of the distribution reward for a certain asset
     * @param asset The incentivized asset
     * @param reward The reward token of the incentivized asset
     * @return The index of the asset distribution
     * @return The emission per second of the reward distribution
     * @return The timestamp of the last update of the index
     * @return The timestamp of the distribution end
     **/
    function getRewardsData(
        address asset,
        address reward
    ) external view returns (uint256, uint256, uint256, uint256);

    /**
     * @dev Returns the list of available reward token addresses of an incentivized asset
     * @param asset The incentivized asset
     * @return List of rewards addresses of the input asset
     **/
    function getRewardsByAsset(
        address asset
    ) external view returns (address[] memory);

    /**
     * @dev Returns the list of available reward addresses
     * @return List of rewards supported in this contract
     **/
    function getRewardsList() external view returns (address[] memory);

    /**
     * @dev Returns the accrued rewards balance of a user, not including virtually accrued rewards since last distribution.
     * @param user The address of the user
     * @param reward The address of the reward token
     * @return Unclaimed rewards, not including new distributions
     **/
    function getUserAccruedRewards(
        address user,
        address reward
    ) external view returns (uint256);

    /**
     * @dev Returns a single rewards balance of a user, including virtually accrued and unrealized claimable rewards.
     * @param assets List of incentivized assets to check eligible distributions
     * @param user The address of the user
     * @param reward The address of the reward token
     * @return The rewards amount
     **/
    function getUserRewards(
        address[] calldata assets,
        address user,
        address reward
    ) external view returns (uint256);

    /**
     * @dev Returns a list all rewards of a user, including already accrued and unrealized claimable rewards
     * @param assets List of incentivized assets to check eligible distributions
     * @param user The address of the user
     * @return The list of reward addresses
     * @return The list of unclaimed amount of rewards
     **/
    function getAllUserRewards(
        address[] calldata assets,
        address user
    ) external view returns (address[] memory, uint256[] memory);

    /**
     * @dev Returns the decimals of an asset to calculate the distribution delta
     * @param asset The address to retrieve decimals
     * @return The decimals of an underlying asset
     */
    function getAssetDecimals(address asset) external view returns (uint8);

    /**
     * @dev Returns the address of the emission manager
     * @return The address of the EmissionManager
     */
    function getEmissionManager() external view returns (address);

    /**
     * @dev Updates the address of the emission manager
     * @param emissionManager The address of the new EmissionManager
     */
    function setEmissionManager(address emissionManager) external;
}

/**
 * @title IRewardsController
 * @author Aave
 * @notice Defines the basic interface for a Rewards Controller.
 */
interface IRewardsController is IRewardsDistributor {
    /**
     * @dev Emitted when a new address is whitelisted as claimer of rewards on behalf of a user
     * @param user The address of the user
     * @param claimer The address of the claimer
     */
    event ClaimerSet(address indexed user, address indexed claimer);

    /**
     * @dev Emitted when rewards are claimed
     * @param user The address of the user rewards has been claimed on behalf of
     * @param reward The address of the token reward is claimed
     * @param to The address of the receiver of the rewards
     * @param claimer The address of the claimer
     * @param amount The amount of rewards claimed
     */
    event RewardsClaimed(
        address indexed user,
        address indexed reward,
        address indexed to,
        address claimer,
        uint256 amount
    );

    /**
     * @dev Emitted when a transfer strategy is installed for the reward distribution
     * @param reward The address of the token reward
     * @param transferStrategy The address of TransferStrategy contract
     */
    event TransferStrategyInstalled(
        address indexed reward,
        address indexed transferStrategy
    );

    /**
     * @dev Emitted when the reward oracle is updated
     * @param reward The address of the token reward
     * @param rewardOracle The address of oracle
     */
    event RewardOracleUpdated(
        address indexed reward,
        address indexed rewardOracle
    );

    /**
     * @dev Whitelists an address to claim the rewards on behalf of another address
     * @param user The address of the user
     * @param claimer The address of the claimer
     */
    function setClaimer(address user, address claimer) external;

    /**
     * @dev Get the price aggregator oracle address
     * @param reward The address of the reward
     * @return The price oracle of the reward
     */
    function getRewardOracle(address reward) external view returns (address);

    /**
     * @dev Returns the whitelisted claimer for a certain address (0x0 if not set)
     * @param user The address of the user
     * @return The claimer address
     */
    function getClaimer(address user) external view returns (address);

    /**
     * @dev Returns the Transfer Strategy implementation contract address being used for a reward address
     * @param reward The address of the reward
     * @return The address of the TransferStrategy contract
     */
    function getTransferStrategy(
        address reward
    ) external view returns (address);

    /**
     * @dev Called by the corresponding asset on any update that affects the rewards distribution
     * @param user The address of the user
     * @param userBalance The user balance of the asset
     * @param totalSupply The total supply of the asset
     **/
    function handleAction(
        address user,
        uint256 userBalance,
        uint256 totalSupply
    ) external;

    /**
     * @dev Claims reward for a user to the desired address, on all the assets of the pool, accumulating the pending rewards
     * @param assets List of assets to check eligible distributions before claiming rewards
     * @param amount The amount of rewards to claim
     * @param to The address that will be receiving the rewards
     * @param reward The address of the reward token
     * @return The amount of rewards claimed
     **/
    function claimRewards(
        address[] calldata assets,
        uint256 amount,
        address to,
        address reward
    ) external returns (uint256);

    /**
     * @dev Claims reward for a user on behalf, on all the assets of the pool, accumulating the pending rewards. The
     * caller must be whitelisted via "allowClaimOnBehalf" function by the RewardsAdmin role manager
     * @param assets The list of assets to check eligible distributions before claiming rewards
     * @param amount The amount of rewards to claim
     * @param user The address to check and claim rewards
     * @param to The address that will be receiving the rewards
     * @param reward The address of the reward token
     * @return The amount of rewards claimed
     **/
    function claimRewardsOnBehalf(
        address[] calldata assets,
        uint256 amount,
        address user,
        address to,
        address reward
    ) external returns (uint256);

    /**
     * @dev Claims reward for msg.sender, on all the assets of the pool, accumulating the pending rewards
     * @param assets The list of assets to check eligible distributions before claiming rewards
     * @param amount The amount of rewards to claim
     * @param reward The address of the reward token
     * @return The amount of rewards claimed
     **/
    function claimRewardsToSelf(
        address[] calldata assets,
        uint256 amount,
        address reward
    ) external returns (uint256);

    /**
     * @dev Claims all rewards for a user to the desired address, on all the assets of the pool, accumulating the pending rewards
     * @param assets The list of assets to check eligible distributions before claiming rewards
     * @param to The address that will be receiving the rewards
     * @return rewardsList List of addresses of the reward tokens
     * @return claimedAmounts List that contains the claimed amount per reward, following same order as "rewardList"
     **/
    function claimAllRewards(
        address[] calldata assets,
        address to
    )
        external
        returns (address[] memory rewardsList, uint256[] memory claimedAmounts);

    /**
     * @dev Claims all rewards for a user on behalf, on all the assets of the pool, accumulating the pending rewards. The caller must
     * be whitelisted via "allowClaimOnBehalf" function by the RewardsAdmin role manager
     * @param assets The list of assets to check eligible distributions before claiming rewards
     * @param user The address to check and claim rewards
     * @param to The address that will be receiving the rewards
     * @return rewardsList List of addresses of the reward tokens
     * @return claimedAmounts List that contains the claimed amount per reward, following same order as "rewardsList"
     **/
    function claimAllRewardsOnBehalf(
        address[] calldata assets,
        address user,
        address to
    )
        external
        returns (address[] memory rewardsList, uint256[] memory claimedAmounts);

    /**
     * @dev Claims all reward for msg.sender, on all the assets of the pool, accumulating the pending rewards
     * @param assets The list of assets to check eligible distributions before claiming rewards
     * @return rewardsList List of addresses of the reward tokens
     * @return claimedAmounts List that contains the claimed amount per reward, following same order as "rewardsList"
     **/
    function claimAllRewardsToSelf(
        address[] calldata assets
    )
        external
        returns (address[] memory rewardsList, uint256[] memory claimedAmounts);
}

// SPDX-License-Identifier: AGPL-3.0
pragma solidity >=0.6.12;
pragma experimental ABIEncoderV2;

import {IPoolAddressesProvider} from "./IPoolAddressesProvider.sol";
import {DataTypesV3} from "./DataTypesV3.sol";

/**
 * @title IPool
 * @author Aave
 * @notice Defines the basic interface for an Aave Pool.
 **/
interface IPool {
    /**
     * @dev Emitted on mintUnbacked()
     * @param reserve The address of the underlying asset of the reserve
     * @param user The address initiating the supply
     * @param onBehalfOf The beneficiary of the supplied assets, receiving the aTokens
     * @param amount The amount of supplied assets
     * @param referralCode The referral code used
     **/
    event MintUnbacked(
        address indexed reserve,
        address user,
        address indexed onBehalfOf,
        uint256 amount,
        uint16 indexed referralCode
    );

    /**
     * @dev Emitted on backUnbacked()
     * @param reserve The address of the underlying asset of the reserve
     * @param backer The address paying for the backing
     * @param amount The amount added as backing
     * @param fee The amount paid in fees
     **/
    event BackUnbacked(
        address indexed reserve,
        address indexed backer,
        uint256 amount,
        uint256 fee
    );

    /**
     * @dev Emitted on supply()
     * @param reserve The address of the underlying asset of the reserve
     * @param user The address initiating the supply
     * @param onBehalfOf The beneficiary of the supply, receiving the aTokens
     * @param amount The amount supplied
     * @param referralCode The referral code used
     **/
    event Supply(
        address indexed reserve,
        address user,
        address indexed onBehalfOf,
        uint256 amount,
        uint16 indexed referralCode
    );

    /**
     * @dev Emitted on withdraw()
     * @param reserve The address of the underlying asset being withdrawn
     * @param user The address initiating the withdrawal, owner of aTokens
     * @param to The address that will receive the underlying
     * @param amount The amount to be withdrawn
     **/
    event Withdraw(
        address indexed reserve,
        address indexed user,
        address indexed to,
        uint256 amount
    );

    /**
     * @dev Emitted on borrow() and flashLoan() when debt needs to be opened
     * @param reserve The address of the underlying asset being borrowed
     * @param user The address of the user initiating the borrow(), receiving the funds on borrow() or just
     * initiator of the transaction on flashLoan()
     * @param onBehalfOf The address that will be getting the debt
     * @param amount The amount borrowed out
     * @param interestRateMode The rate mode: 1 for Stable, 2 for Variable
     * @param borrowRate The numeric rate at which the user has borrowed, expressed in ray
     * @param referralCode The referral code used
     **/
    event Borrow(
        address indexed reserve,
        address user,
        address indexed onBehalfOf,
        uint256 amount,
        DataTypesV3.InterestRateMode interestRateMode,
        uint256 borrowRate,
        uint16 indexed referralCode
    );

    /**
     * @dev Emitted on repay()
     * @param reserve The address of the underlying asset of the reserve
     * @param user The beneficiary of the repayment, getting his debt reduced
     * @param repayer The address of the user initiating the repay(), providing the funds
     * @param amount The amount repaid
     * @param useATokens True if the repayment is done using aTokens, `false` if done with underlying asset directly
     **/
    event Repay(
        address indexed reserve,
        address indexed user,
        address indexed repayer,
        uint256 amount,
        bool useATokens
    );

    /**
     * @dev Emitted on swapBorrowRateMode()
     * @param reserve The address of the underlying asset of the reserve
     * @param user The address of the user swapping his rate mode
     * @param interestRateMode The current interest rate mode of the position being swapped: 1 for Stable, 2 for Variable
     **/
    event SwapBorrowRateMode(
        address indexed reserve,
        address indexed user,
        DataTypesV3.InterestRateMode interestRateMode
    );

    /**
     * @dev Emitted on borrow(), repay() and liquidationCall() when using isolated assets
     * @param asset The address of the underlying asset of the reserve
     * @param totalDebt The total isolation mode debt for the reserve
     */
    event IsolationModeTotalDebtUpdated(
        address indexed asset,
        uint256 totalDebt
    );

    /**
     * @dev Emitted when the user selects a certain asset category for eMode
     * @param user The address of the user
     * @param categoryId The category id
     **/
    event UserEModeSet(address indexed user, uint8 categoryId);

    /**
     * @dev Emitted on setUserUseReserveAsCollateral()
     * @param reserve The address of the underlying asset of the reserve
     * @param user The address of the user enabling the usage as collateral
     **/
    event ReserveUsedAsCollateralEnabled(
        address indexed reserve,
        address indexed user
    );

    /**
     * @dev Emitted on setUserUseReserveAsCollateral()
     * @param reserve The address of the underlying asset of the reserve
     * @param user The address of the user enabling the usage as collateral
     **/
    event ReserveUsedAsCollateralDisabled(
        address indexed reserve,
        address indexed user
    );

    /**
     * @dev Emitted on rebalanceStableBorrowRate()
     * @param reserve The address of the underlying asset of the reserve
     * @param user The address of the user for which the rebalance has been executed
     **/
    event RebalanceStableBorrowRate(
        address indexed reserve,
        address indexed user
    );

    /**
     * @dev Emitted on flashLoan()
     * @param target The address of the flash loan receiver contract
     * @param initiator The address initiating the flash loan
     * @param asset The address of the asset being flash borrowed
     * @param amount The amount flash borrowed
     * @param interestRateMode The flashloan mode: 0 for regular flashloan, 1 for Stable debt, 2 for Variable debt
     * @param premium The fee flash borrowed
     * @param referralCode The referral code used
     **/
    event FlashLoan(
        address indexed target,
        address initiator,
        address indexed asset,
        uint256 amount,
        DataTypesV3.InterestRateMode interestRateMode,
        uint256 premium,
        uint16 indexed referralCode
    );

    /**
     * @dev Emitted when a borrower is liquidated.
     * @param collateralAsset The address of the underlying asset used as collateral, to receive as result of the liquidation
     * @param debtAsset The address of the underlying borrowed asset to be repaid with the liquidation
     * @param user The address of the borrower getting liquidated
     * @param debtToCover The debt amount of borrowed `asset` the liquidator wants to cover
     * @param liquidatedCollateralAmount The amount of collateral received by the liquidator
     * @param liquidator The address of the liquidator
     * @param receiveAToken True if the liquidators wants to receive the collateral aTokens, `false` if he wants
     * to receive the underlying collateral asset directly
     **/
    event LiquidationCall(
        address indexed collateralAsset,
        address indexed debtAsset,
        address indexed user,
        uint256 debtToCover,
        uint256 liquidatedCollateralAmount,
        address liquidator,
        bool receiveAToken
    );

    /**
     * @dev Emitted when the state of a reserve is updated.
     * @param reserve The address of the underlying asset of the reserve
     * @param liquidityRate The next liquidity rate
     * @param stableBorrowRate The next stable borrow rate
     * @param variableBorrowRate The next variable borrow rate
     * @param liquidityIndex The next liquidity index
     * @param variableBorrowIndex The next variable borrow index
     **/
    event ReserveDataUpdated(
        address indexed reserve,
        uint256 liquidityRate,
        uint256 stableBorrowRate,
        uint256 variableBorrowRate,
        uint256 liquidityIndex,
        uint256 variableBorrowIndex
    );

    /**
     * @dev Emitted when the protocol treasury receives minted aTokens from the accrued interest.
     * @param reserve The address of the reserve
     * @param amountMinted The amount minted to the treasury
     **/
    event MintedToTreasury(address indexed reserve, uint256 amountMinted);

    /**
     * @dev Mints an `amount` of aTokens to the `onBehalfOf`
     * @param asset The address of the underlying asset to mint
     * @param amount The amount to mint
     * @param onBehalfOf The address that will receive the aTokens
     * @param referralCode Code used to register the integrator originating the operation, for potential rewards.
     *   0 if the action is executed directly by the user, without any middle-man
     **/
    function mintUnbacked(
        address asset,
        uint256 amount,
        address onBehalfOf,
        uint16 referralCode
    ) external;

    /**
     * @dev Back the current unbacked underlying with `amount` and pay `fee`.
     * @param asset The address of the underlying asset to back
     * @param amount The amount to back
     * @param fee The amount paid in fees
     **/
    function backUnbacked(address asset, uint256 amount, uint256 fee) external;

    /**
     * @notice Supplies an `amount` of underlying asset into the reserve, receiving in return overlying aTokens.
     * - E.g. User supplies 100 USDC and gets in return 100 aUSDC
     * @param asset The address of the underlying asset to supply
     * @param amount The amount to be supplied
     * @param onBehalfOf The address that will receive the aTokens, same as msg.sender if the user
     *   wants to receive them on his own wallet, or a different address if the beneficiary of aTokens
     *   is a different wallet
     * @param referralCode Code used to register the integrator originating the operation, for potential rewards.
     *   0 if the action is executed directly by the user, without any middle-man
     **/
    function supply(
        address asset,
        uint256 amount,
        address onBehalfOf,
        uint16 referralCode
    ) external;

    /**
     * @notice Supply with transfer approval of asset to be supplied done via permit function
     * see: https://eips.ethereum.org/EIPS/eip-2612 and https://eips.ethereum.org/EIPS/eip-713
     * @param asset The address of the underlying asset to supply
     * @param amount The amount to be supplied
     * @param onBehalfOf The address that will receive the aTokens, same as msg.sender if the user
     *   wants to receive them on his own wallet, or a different address if the beneficiary of aTokens
     *   is a different wallet
     * @param deadline The deadline timestamp that the permit is valid
     * @param referralCode Code used to register the integrator originating the operation, for potential rewards.
     *   0 if the action is executed directly by the user, without any middle-man
     * @param permitV The V parameter of ERC712 permit sig
     * @param permitR The R parameter of ERC712 permit sig
     * @param permitS The S parameter of ERC712 permit sig
     **/
    function supplyWithPermit(
        address asset,
        uint256 amount,
        address onBehalfOf,
        uint16 referralCode,
        uint256 deadline,
        uint8 permitV,
        bytes32 permitR,
        bytes32 permitS
    ) external;

    /**
     * @notice Withdraws an `amount` of underlying asset from the reserve, burning the equivalent aTokens owned
     * E.g. User has 100 aUSDC, calls withdraw() and receives 100 USDC, burning the 100 aUSDC
     * @param asset The address of the underlying asset to withdraw
     * @param amount The underlying amount to be withdrawn
     *   - Send the value type(uint256).max in order to withdraw the whole aToken balance
     * @param to The address that will receive the underlying, same as msg.sender if the user
     *   wants to receive it on his own wallet, or a different address if the beneficiary is a
     *   different wallet
     * @return The final amount withdrawn
     **/
    function withdraw(
        address asset,
        uint256 amount,
        address to
    ) external returns (uint256);

    /**
     * @notice Allows users to borrow a specific `amount` of the reserve underlying asset, provided that the borrower
     * already supplied enough collateral, or he was given enough allowance by a credit delegator on the
     * corresponding debt token (StableDebtToken or VariableDebtToken)
     * - E.g. User borrows 100 USDC passing as `onBehalfOf` his own address, receiving the 100 USDC in his wallet
     *   and 100 stable/variable debt tokens, depending on the `interestRateMode`
     * @param asset The address of the underlying asset to borrow
     * @param amount The amount to be borrowed
     * @param interestRateMode The interest rate mode at which the user wants to borrow: 1 for Stable, 2 for Variable
     * @param referralCode The code used to register the integrator originating the operation, for potential rewards.
     *   0 if the action is executed directly by the user, without any middle-man
     * @param onBehalfOf The address of the user who will receive the debt. Should be the address of the borrower itself
     * calling the function if he wants to borrow against his own collateral, or the address of the credit delegator
     * if he has been given credit delegation allowance
     **/
    function borrow(
        address asset,
        uint256 amount,
        uint256 interestRateMode,
        uint16 referralCode,
        address onBehalfOf
    ) external;

    /**
     * @notice Repays a borrowed `amount` on a specific reserve, burning the equivalent debt tokens owned
     * - E.g. User repays 100 USDC, burning 100 variable/stable debt tokens of the `onBehalfOf` address
     * @param asset The address of the borrowed underlying asset previously borrowed
     * @param amount The amount to repay
     * - Send the value type(uint256).max in order to repay the whole debt for `asset` on the specific `debtMode`
     * @param interestRateMode The interest rate mode at of the debt the user wants to repay: 1 for Stable, 2 for Variable
     * @param onBehalfOf The address of the user who will get his debt reduced/removed. Should be the address of the
     * user calling the function if he wants to reduce/remove his own debt, or the address of any other
     * other borrower whose debt should be removed
     * @return The final amount repaid
     **/
    function repay(
        address asset,
        uint256 amount,
        uint256 interestRateMode,
        address onBehalfOf
    ) external returns (uint256);

    /**
     * @notice Repay with transfer approval of asset to be repaid done via permit function
     * see: https://eips.ethereum.org/EIPS/eip-2612 and https://eips.ethereum.org/EIPS/eip-713
     * @param asset The address of the borrowed underlying asset previously borrowed
     * @param amount The amount to repay
     * - Send the value type(uint256).max in order to repay the whole debt for `asset` on the specific `debtMode`
     * @param interestRateMode The interest rate mode at of the debt the user wants to repay: 1 for Stable, 2 for Variable
     * @param onBehalfOf Address of the user who will get his debt reduced/removed. Should be the address of the
     * user calling the function if he wants to reduce/remove his own debt, or the address of any other
     * other borrower whose debt should be removed
     * @param deadline The deadline timestamp that the permit is valid
     * @param permitV The V parameter of ERC712 permit sig
     * @param permitR The R parameter of ERC712 permit sig
     * @param permitS The S parameter of ERC712 permit sig
     * @return The final amount repaid
     **/
    function repayWithPermit(
        address asset,
        uint256 amount,
        uint256 interestRateMode,
        address onBehalfOf,
        uint256 deadline,
        uint8 permitV,
        bytes32 permitR,
        bytes32 permitS
    ) external returns (uint256);

    /**
     * @notice Repays a borrowed `amount` on a specific reserve using the reserve aTokens, burning the
     * equivalent debt tokens
     * - E.g. User repays 100 USDC using 100 aUSDC, burning 100 variable/stable debt tokens
     * @dev  Passing uint256.max as amount will clean up any residual aToken dust balance, if the user aToken
     * balance is not enough to cover the whole debt
     * @param asset The address of the borrowed underlying asset previously borrowed
     * @param amount The amount to repay
     * - Send the value type(uint256).max in order to repay the whole debt for `asset` on the specific `debtMode`
     * @param interestRateMode The interest rate mode at of the debt the user wants to repay: 1 for Stable, 2 for Variable
     * @return The final amount repaid
     **/
    function repayWithATokens(
        address asset,
        uint256 amount,
        uint256 interestRateMode
    ) external returns (uint256);

    /**
     * @notice Allows a borrower to swap his debt between stable and variable mode, or vice versa
     * @param asset The address of the underlying asset borrowed
     * @param interestRateMode The current interest rate mode of the position being swapped: 1 for Stable, 2 for Variable
     **/
    function swapBorrowRateMode(
        address asset,
        uint256 interestRateMode
    ) external;

    /**
     * @notice Rebalances the stable interest rate of a user to the current stable rate defined on the reserve.
     * - Users can be rebalanced if the following conditions are satisfied:
     *     1. Usage ratio is above 95%
     *     2. the current supply APY is below REBALANCE_UP_THRESHOLD * maxVariableBorrowRate, which means that too
     *        much has been borrowed at a stable rate and suppliers are not earning enough
     * @param asset The address of the underlying asset borrowed
     * @param user The address of the user to be rebalanced
     **/
    function rebalanceStableBorrowRate(address asset, address user) external;

    /**
     * @notice Allows suppliers to enable/disable a specific supplied asset as collateral
     * @param asset The address of the underlying asset supplied
     * @param useAsCollateral True if the user wants to use the supply as collateral, false otherwise
     **/
    function setUserUseReserveAsCollateral(
        address asset,
        bool useAsCollateral
    ) external;

    /**
     * @notice Function to liquidate a non-healthy position collateral-wise, with Health Factor below 1
     * - The caller (liquidator) covers `debtToCover` amount of debt of the user getting liquidated, and receives
     *   a proportionally amount of the `collateralAsset` plus a bonus to cover market risk
     * @param collateralAsset The address of the underlying asset used as collateral, to receive as result of the liquidation
     * @param debtAsset The address of the underlying borrowed asset to be repaid with the liquidation
     * @param user The address of the borrower getting liquidated
     * @param debtToCover The debt amount of borrowed `asset` the liquidator wants to cover
     * @param receiveAToken True if the liquidators wants to receive the collateral aTokens, `false` if he wants
     * to receive the underlying collateral asset directly
     **/
    function liquidationCall(
        address collateralAsset,
        address debtAsset,
        address user,
        uint256 debtToCover,
        bool receiveAToken
    ) external;

    /**
     * @notice Allows smartcontracts to access the liquidity of the pool within one transaction,
     * as long as the amount taken plus a fee is returned.
     * @dev IMPORTANT There are security concerns for developers of flashloan receiver contracts that must be kept
     * into consideration. For further details please visit https://developers.aave.com
     * @param receiverAddress The address of the contract receiving the funds, implementing IFlashLoanReceiver interface
     * @param assets The addresses of the assets being flash-borrowed
     * @param amounts The amounts of the assets being flash-borrowed
     * @param interestRateModes Types of the debt to open if the flash loan is not returned:
     *   0 -> Don't open any debt, just revert if funds can't be transferred from the receiver
     *   1 -> Open debt at stable rate for the value of the amount flash-borrowed to the `onBehalfOf` address
     *   2 -> Open debt at variable rate for the value of the amount flash-borrowed to the `onBehalfOf` address
     * @param onBehalfOf The address  that will receive the debt in the case of using on `modes` 1 or 2
     * @param params Variadic packed params to pass to the receiver as extra information
     * @param referralCode The code used to register the integrator originating the operation, for potential rewards.
     *   0 if the action is executed directly by the user, without any middle-man
     **/
    function flashLoan(
        address receiverAddress,
        address[] calldata assets,
        uint256[] calldata amounts,
        uint256[] calldata interestRateModes,
        address onBehalfOf,
        bytes calldata params,
        uint16 referralCode
    ) external;

    /**
     * @notice Allows smartcontracts to access the liquidity of the pool within one transaction,
     * as long as the amount taken plus a fee is returned.
     * @dev IMPORTANT There are security concerns for developers of flashloan receiver contracts that must be kept
     * into consideration. For further details please visit https://developers.aave.com
     * @param receiverAddress The address of the contract receiving the funds, implementing IFlashLoanSimpleReceiver interface
     * @param asset The address of the asset being flash-borrowed
     * @param amount The amount of the asset being flash-borrowed
     * @param params Variadic packed params to pass to the receiver as extra information
     * @param referralCode The code used to register the integrator originating the operation, for potential rewards.
     *   0 if the action is executed directly by the user, without any middle-man
     **/
    function flashLoanSimple(
        address receiverAddress,
        address asset,
        uint256 amount,
        bytes calldata params,
        uint16 referralCode
    ) external;

    /**
     * @notice Returns the user account data across all the reserves
     * @param user The address of the user
     * @return totalCollateralBase The total collateral of the user in the base currency used by the price feed
     * @return totalDebtBase The total debt of the user in the base currency used by the price feed
     * @return availableBorrowsBase The borrowing power left of the user in the base currency used by the price feed
     * @return currentLiquidationThreshold The liquidation threshold of the user
     * @return ltv The loan to value of The user
     * @return healthFactor The current health factor of the user
     **/
    function getUserAccountData(
        address user
    )
        external
        view
        returns (
            uint256 totalCollateralBase,
            uint256 totalDebtBase,
            uint256 availableBorrowsBase,
            uint256 currentLiquidationThreshold,
            uint256 ltv,
            uint256 healthFactor
        );

    /**
     * @notice Initializes a reserve, activating it, assigning an aToken and debt tokens and an
     * interest rate strategy
     * @dev Only callable by the PoolConfigurator contract
     * @param asset The address of the underlying asset of the reserve
     * @param aTokenAddress The address of the aToken that will be assigned to the reserve
     * @param stableDebtAddress The address of the StableDebtToken that will be assigned to the reserve
     * @param variableDebtAddress The address of the VariableDebtToken that will be assigned to the reserve
     * @param interestRateStrategyAddress The address of the interest rate strategy contract
     **/
    function initReserve(
        address asset,
        address aTokenAddress,
        address stableDebtAddress,
        address variableDebtAddress,
        address interestRateStrategyAddress
    ) external;

    /**
     * @notice Drop a reserve
     * @dev Only callable by the PoolConfigurator contract
     * @param asset The address of the underlying asset of the reserve
     **/
    function dropReserve(address asset) external;

    /**
     * @notice Updates the address of the interest rate strategy contract
     * @dev Only callable by the PoolConfigurator contract
     * @param asset The address of the underlying asset of the reserve
     * @param rateStrategyAddress The address of the interest rate strategy contract
     **/
    function setReserveInterestRateStrategyAddress(
        address asset,
        address rateStrategyAddress
    ) external;

    /**
     * @notice Sets the configuration bitmap of the reserve as a whole
     * @dev Only callable by the PoolConfigurator contract
     * @param asset The address of the underlying asset of the reserve
     * @param configuration The new configuration bitmap
     **/
    function setConfiguration(
        address asset,
        DataTypesV3.ReserveConfigurationMap calldata configuration
    ) external;

    /**
     * @notice Returns the configuration of the reserve
     * @param asset The address of the underlying asset of the reserve
     * @return The configuration of the reserve
     **/
    function getConfiguration(
        address asset
    ) external view returns (DataTypesV3.ReserveConfigurationMap memory);

    /**
     * @notice Returns the configuration of the user across all the reserves
     * @param user The user address
     * @return The configuration of the user
     **/
    function getUserConfiguration(
        address user
    ) external view returns (DataTypesV3.UserConfigurationMap memory);

    /**
     * @notice Returns the normalized income normalized income of the reserve
     * @param asset The address of the underlying asset of the reserve
     * @return The reserve's normalized income
     */
    function getReserveNormalizedIncome(
        address asset
    ) external view returns (uint256);

    /**
     * @notice Returns the normalized variable debt per unit of asset
     * @param asset The address of the underlying asset of the reserve
     * @return The reserve normalized variable debt
     */
    function getReserveNormalizedVariableDebt(
        address asset
    ) external view returns (uint256);

    function getReserveDataExtended(
        address asset
    ) external view returns (DataTypesV3.ReserveData memory);

    function getVirtualUnderlyingBalance(
        address asset
    ) external view returns (uint256);

    /**
     * @notice Returns the state and configuration of the reserve
     * @param asset The address of the underlying asset of the reserve
     * @return The state and configuration data of the reserve
     **/
    function getReserveData(
        address asset
    ) external view returns (DataTypesV3.ReserveDataLegacy memory);

    /**
     * @notice Validates and finalizes an aToken transfer
     * @dev Only callable by the overlying aToken of the `asset`
     * @param asset The address of the underlying asset of the aToken
     * @param from The user from which the aTokens are transferred
     * @param to The user receiving the aTokens
     * @param amount The amount being transferred/withdrawn
     * @param balanceFromBefore The aToken balance of the `from` user before the transfer
     * @param balanceToBefore The aToken balance of the `to` user before the transfer
     */
    function finalizeTransfer(
        address asset,
        address from,
        address to,
        uint256 amount,
        uint256 balanceFromBefore,
        uint256 balanceToBefore
    ) external;

    /**
     * @notice Returns the list of the underlying assets of all the initialized reserves
     * @dev It does not include dropped reserves
     * @return The addresses of the underlying assets of the initialized reserves
     **/
    function getReservesList() external view returns (address[] memory);

    /**
     * @notice Returns the address of the underlying asset of a reserve by the reserve id as stored in the DataTypesV3.ReserveData struct
     * @param id The id of the reserve as stored in the DataTypesV3.ReserveData struct
     * @return The address of the reserve associated with id
     **/
    function getReserveAddressById(uint16 id) external view returns (address);

    /**
     * @notice Returns the PoolAddressesProvider connected to this contract
     * @return The address of the PoolAddressesProvider
     **/
    function ADDRESSES_PROVIDER()
        external
        view
        returns (IPoolAddressesProvider);

    /**
     * @notice Updates the protocol fee on the bridging
     * @param bridgeProtocolFee The part of the premium sent to the protocol treasury
     */
    function updateBridgeProtocolFee(uint256 bridgeProtocolFee) external;

    /**
     * @notice Updates flash loan premiums. Flash loan premium consists of two parts:
     * - A part is sent to aToken holders as extra, one time accumulated interest
     * - A part is collected by the protocol treasury
     * @dev The total premium is calculated on the total borrowed amount
     * @dev The premium to protocol is calculated on the total premium, being a percentage of `flashLoanPremiumTotal`
     * @dev Only callable by the PoolConfigurator contract
     * @param flashLoanPremiumTotal The total premium, expressed in bps
     * @param flashLoanPremiumToProtocol The part of the premium sent to the protocol treasury, expressed in bps
     */
    function updateFlashloanPremiums(
        uint128 flashLoanPremiumTotal,
        uint128 flashLoanPremiumToProtocol
    ) external;

    /**
     * @notice Configures a new category for the eMode.
     * @dev In eMode, the protocol allows very high borrowing power to borrow assets of the same category.
     * The category 0 is reserved as it's the default for volatile assets
     * @param id The id of the category
     * @param config The configuration of the category
     */
    function configureEModeCategory(
        uint8 id,
        DataTypesV3.EModeCategory memory config
    ) external;

    /**
     * @notice Returns the data of an eMode category
     * @param id The id of the category
     * @return The configuration data of the category
     */
    function getEModeCategoryData(
        uint8 id
    ) external view returns (DataTypesV3.EModeCategory memory);

    /**
     * @notice Allows a user to use the protocol in eMode
     * @param categoryId The id of the category
     */
    function setUserEMode(uint8 categoryId) external;

    /**
     * @notice Returns the eMode the user is using
     * @param user The address of the user
     * @return The eMode id
     */
    function getUserEMode(address user) external view returns (uint256);

    /**
     * @notice Resets the isolation mode total debt of the given asset to zero
     * @dev It requires the given asset has zero debt ceiling
     * @param asset The address of the underlying asset to reset the isolationModeTotalDebt
     */
    function resetIsolationModeTotalDebt(address asset) external;

    /**
     * @notice Returns the percentage of available liquidity that can be borrowed at once at stable rate
     * @return The percentage of available liquidity to borrow, expressed in bps
     */
    function MAX_STABLE_RATE_BORROW_SIZE_PERCENT()
        external
        view
        returns (uint256);

    /**
     * @notice Returns the total fee on flash loans
     * @return The total fee on flashloans
     */
    function FLASHLOAN_PREMIUM_TOTAL() external view returns (uint128);

    /**
     * @notice Returns the part of the bridge fees sent to protocol
     * @return The bridge fee sent to the protocol treasury
     */
    function BRIDGE_PROTOCOL_FEE() external view returns (uint256);

    /**
     * @notice Returns the part of the flashloan fees sent to protocol
     * @return The flashloan fee sent to the protocol treasury
     */
    function FLASHLOAN_PREMIUM_TO_PROTOCOL() external view returns (uint128);

    /**
     * @notice Returns the maximum number of reserves supported to be listed in this Pool
     * @return The maximum number of reserves supported
     */
    function MAX_NUMBER_RESERVES() external view returns (uint16);

    /**
     * @notice Mints the assets accrued through the reserve factor to the treasury in the form of aTokens
     * @param assets The list of reserves for which the minting needs to be executed
     **/
    function mintToTreasury(address[] calldata assets) external;

    /**
     * @notice Rescue and transfer tokens locked in this contract
     * @param token The address of the token
     * @param to The address of the recipient
     * @param amount The amount of token to transfer
     */
    function rescueTokens(address token, address to, uint256 amount) external;

    /**
     * @notice Supplies an `amount` of underlying asset into the reserve, receiving in return overlying aTokens.
     * - E.g. User supplies 100 USDC and gets in return 100 aUSDC
     * @dev Deprecated: Use the `supply` function instead
     * @param asset The address of the underlying asset to supply
     * @param amount The amount to be supplied
     * @param onBehalfOf The address that will receive the aTokens, same as msg.sender if the user
     *   wants to receive them on his own wallet, or a different address if the beneficiary of aTokens
     *   is a different wallet
     * @param referralCode Code used to register the integrator originating the operation, for potential rewards.
     *   0 if the action is executed directly by the user, without any middle-man
     **/
    function deposit(
        address asset,
        uint256 amount,
        address onBehalfOf,
        uint16 referralCode
    ) external;
}

// SPDX-License-Identifier: AGPL-3.0
pragma solidity >=0.6.12;

interface IStakedAave {
    struct CooldownSnapshot {
        uint40 timestamp;
        uint216 amount;
    }

    function stake(address to, uint256 amount) external;

    function redeem(address to, uint256 amount) external;

    function cooldown() external;

    function claimRewards(address to, uint256 amount) external;

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

    function getCooldownSeconds() external view returns (uint256);

    function stakersCooldowns(
        address
    ) external view returns (CooldownSnapshot memory);

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

// SPDX-License-Identifier: AGPL-3.0
pragma solidity >=0.6.12;

import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v4.9.5/contracts/token/ERC20/IERC20.sol";
import {IScaledBalanceToken} from "./IScaledBalanceToken.sol";
import {IRewardsController} from "./IRewardsController.sol";
import {IPool} from "./IPool.sol";

/**
 * @title IInitializableAToken
 * @author Aave
 * @notice Interface for the initialize function on AToken
 **/
interface IInitializableAToken {
    /**
     * @dev Emitted when an aToken is initialized
     * @param underlyingAsset The address of the underlying asset
     * @param pool The address of the associated pool
     * @param treasury The address of the treasury
     * @param incentivesController The address of the incentives controller for this aToken
     * @param aTokenDecimals The decimals of the underlying
     * @param aTokenName The name of the aToken
     * @param aTokenSymbol The symbol of the aToken
     * @param params A set of encoded parameters for additional initialization
     **/
    event Initialized(
        address indexed underlyingAsset,
        address indexed pool,
        address treasury,
        address incentivesController,
        uint8 aTokenDecimals,
        string aTokenName,
        string aTokenSymbol,
        bytes params
    );

    /**
     * @notice Initializes the aToken
     * @param pool The pool contract that is initializing this contract
     * @param treasury The address of the Aave treasury, receiving the fees on this aToken
     * @param underlyingAsset The address of the underlying asset of this aToken (E.g. WETH for aWETH)
     * @param incentivesController The smart contract managing potential incentives distribution
     * @param aTokenDecimals The decimals of the aToken, same as the underlying asset's
     * @param aTokenName The name of the aToken
     * @param aTokenSymbol The symbol of the aToken
     * @param params A set of encoded parameters for additional initialization
     */
    function initialize(
        IPool pool,
        address treasury,
        address underlyingAsset,
        IRewardsController incentivesController,
        uint8 aTokenDecimals,
        string calldata aTokenName,
        string calldata aTokenSymbol,
        bytes calldata params
    ) external;
}

/**
 * @title IAToken
 * @author Aave
 * @notice Defines the basic interface for an AToken.
 **/
interface IAToken is IERC20, IScaledBalanceToken, IInitializableAToken {
    /**
     * @dev Emitted during the transfer action
     * @param from The user whose tokens are being transferred
     * @param to The recipient
     * @param value The amount being transferred
     * @param index The next liquidity index of the reserve
     **/
    event BalanceTransfer(
        address indexed from,
        address indexed to,
        uint256 value,
        uint256 index
    );

    /**
     * @notice Mints `amount` aTokens to `user`
     * @param caller The address performing the mint
     * @param onBehalfOf The address of the user that will receive the minted aTokens
     * @param amount The amount of tokens getting minted
     * @param index The next liquidity index of the reserve
     * @return `true` if the the previous balance of the user was 0
     */
    function mint(
        address caller,
        address onBehalfOf,
        uint256 amount,
        uint256 index
    ) external returns (bool);

    /**
     * @notice Burns aTokens from `user` and sends the equivalent amount of underlying to `receiverOfUnderlying`
     * @dev In some instances, the mint event could be emitted from a burn transaction
     * if the amount to burn is less than the interest that the user accrued
     * @param from The address from which the aTokens will be burned
     * @param receiverOfUnderlying The address that will receive the underlying
     * @param amount The amount being burned
     * @param index The next liquidity index of the reserve
     **/
    function burn(
        address from,
        address receiverOfUnderlying,
        uint256 amount,
        uint256 index
    ) external;

    /**
     * @notice Mints aTokens to the reserve treasury
     * @param amount The amount of tokens getting minted
     * @param index The next liquidity index of the reserve
     */
    function mintToTreasury(uint256 amount, uint256 index) external;

    /**
     * @notice Transfers aTokens in the event of a borrow being liquidated, in case the liquidators reclaims the aToken
     * @param from The address getting liquidated, current owner of the aTokens
     * @param to The recipient
     * @param value The amount of tokens getting transferred
     **/
    function transferOnLiquidation(
        address from,
        address to,
        uint256 value
    ) external;

    /**
     * @notice Transfers the underlying asset to `target`.
     * @dev Used by the Pool to transfer assets in borrow(), withdraw() and flashLoan()
     * @param user The recipient of the underlying
     * @param amount The amount getting transferred
     **/
    function transferUnderlyingTo(address user, uint256 amount) external;

    /**
     * @notice Handles the underlying received by the aToken after the transfer has been completed.
     * @dev The default implementation is empty as with standard ERC20 tokens, nothing needs to be done after the
     * transfer is concluded. However in the future there may be aTokens that allow for example to stake the underlying
     * to receive LM rewards. In that case, `handleRepayment()` would perform the staking of the underlying asset.
     * @param user The user executing the repayment
     * @param amount The amount getting repaid
     **/
    function handleRepayment(address user, uint256 amount) external;

    /**
     * @notice Allow passing a signed message to approve spending
     * @dev implements the permit function as for
     * https://github.com/ethereum/EIPs/blob/8a34d644aacf0f9f8f00815307fd7dd5da07655f/EIPS/eip-2612.md
     * @param owner The owner of the funds
     * @param spender The spender
     * @param value The amount
     * @param deadline The deadline timestamp, type(uint256).max for max deadline
     * @param v Signature param
     * @param s Signature param
     * @param r Signature param
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    /**
     * @dev Returns the address of the incentives controller contract
     **/
    function getIncentivesController()
        external
        view
        returns (IRewardsController);

    /**
     * @notice Returns the address of the underlying asset of this aToken (E.g. WETH for aWETH)
     * @return The address of the underlying asset
     **/
    function UNDERLYING_ASSET_ADDRESS() external view returns (address);

    /**
     * @notice Returns the address of the Aave treasury, receiving the fees on this aToken.
     * @return Address of the Aave treasury
     **/
    function RESERVE_TREASURY_ADDRESS() external view returns (address);

    /**
     * @notice Get the domain separator for the token
     * @dev Return cached value if chainId matches cache, otherwise recomputes separator
     * @return The domain separator of the token at current chain
     */
    function DOMAIN_SEPARATOR() external view returns (bytes32);

    /**
     * @notice Returns the nonce for owner.
     * @param owner The address of the owner
     * @return The nonce of the owner
     **/
    function nonces(address owner) external view returns (uint256);

    /**
     * @notice Rescue and transfer tokens locked in this contract
     * @param token The address of the token
     * @param to The address of the recipient
     * @param amount The amount of token to transfer
     */
    function rescueTokens(address token, address to, uint256 amount) external;
}

// 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/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: AGPL-3.0
pragma solidity >=0.8.18;

import {ERC20} from "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v4.9.5/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 =
        0x254A93feff3BEeF9cA004E913bB5443754e8aB19;

    /*//////////////////////////////////////////////////////////////
                            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;

import {ERC20} from "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v4.9.5/contracts/token/ERC20/ERC20.sol";
import {IERC4626} from "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v4.9.5/contracts/interfaces/IERC4626.sol";
import {IERC20Permit} from "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v4.9.5/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: 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: GPL-2.0-or-later
pragma solidity >=0.6.12;
pragma experimental ABIEncoderV2;

import "./IUniswapV3SwapCallback.sol";

/// @title Router token swapping functionality
/// @notice Functions for swapping tokens via Uniswap V3
interface ISwapRouter is IUniswapV3SwapCallback {
    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);

    // Taken from https://soliditydeveloper.com/uniswap3
    // Manually added to the interface
    function refundETH() external payable;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../extensions/draft-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;

    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'
        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) + value;
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    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");
            uint256 newAllowance = oldAllowance - value;
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
        }
    }

    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");
        if (returndata.length > 0) {
            // Return data is optional
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (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].
 *
 * 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}.
     *
     * The default value of {decimals} is 18. To select a different value for
     * {decimals} you should overload it.
     *
     * 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 value {ERC20} uses, unless this function is
     * 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: AGPL-3.0
pragma solidity >=0.8.18;

import {Auction} from "./Auction.sol";
import {Clonable} from "../utils/Clonable.sol";

/// @title AuctionFactory
/// @notice Deploy a new Auction.
contract AuctionFactory is Clonable {
    event DeployedNewAuction(address indexed auction, address indexed want);

    /// @notice The time that each auction lasts.
    uint256 public constant DEFAULT_AUCTION_LENGTH = 1 days;

    /// @notice The minimum time to wait between auction 'kicks'.
    uint256 public constant DEFAULT_AUCTION_COOLDOWN = 5 days;

    /// @notice The amount to start the auction with.
    uint256 public constant DEFAULT_STARTING_PRICE = 1_000_000;

    /// @notice Full array of all auctions deployed through this factory.
    address[] public auctions;

    constructor() {
        // Deploy the original
        original = address(new Auction());
    }

    /**
     * @notice Creates a new auction contract.
     * @param _want Address of the token users will bid with.
     * @return _newAuction Address of the newly created auction contract.
     */
    function createNewAuction(address _want) external returns (address) {
        return
            _createNewAuction(
                _want,
                address(0),
                msg.sender,
                DEFAULT_AUCTION_LENGTH,
                DEFAULT_AUCTION_COOLDOWN,
                DEFAULT_STARTING_PRICE
            );
    }

    /**
     * @notice Creates a new auction contract.
     * @param _want Address of the token users will bid with.
     * @param _hook Address of the hook contract if any.
     * @return _newAuction Address of the newly created auction contract.
     */
    function createNewAuction(
        address _want,
        address _hook
    ) external returns (address) {
        return
            _createNewAuction(
                _want,
                _hook,
                msg.sender,
                DEFAULT_AUCTION_LENGTH,
                DEFAULT_AUCTION_COOLDOWN,
                DEFAULT_STARTING_PRICE
            );
    }

    /**
     * @notice Creates a new auction contract.
     * @param _want Address of the token users will bid with.
     * @param _hook Address of the hook contract if any.
     * @param _governance Address allowed to enable and disable auctions.
     * @return _newAuction Address of the newly created auction contract.
     */
    function createNewAuction(
        address _want,
        address _hook,
        address _governance
    ) external returns (address) {
        return
            _createNewAuction(
                _want,
                _hook,
                _governance,
                DEFAULT_AUCTION_LENGTH,
                DEFAULT_AUCTION_COOLDOWN,
                DEFAULT_STARTING_PRICE
            );
    }

    /**
     * @notice Creates a new auction contract.
     * @param _want Address of the token users will bid with.
     * @param _hook Address of the hook contract if any.
     * @param _governance Address allowed to enable and disable auctions.
     * @param _auctionLength Length of the auction in seconds.
     * @return _newAuction Address of the newly created auction contract.
     */
    function createNewAuction(
        address _want,
        address _hook,
        address _governance,
        uint256 _auctionLength
    ) external returns (address) {
        return
            _createNewAuction(
                _want,
                _hook,
                _governance,
                _auctionLength,
                DEFAULT_AUCTION_COOLDOWN,
                DEFAULT_STARTING_PRICE
            );
    }

    /**
     * @notice Creates a new auction contract.
     * @param _want Address of the token users will bid with.
     * @param _hook Address of the hook contract if any.
     * @param _governance Address allowed to enable and disable auctions.
     * @param _auctionLength Length of the auction in seconds.
     * @param _auctionCooldown Minimum time period between kicks in seconds.
     * @return _newAuction Address of the newly created auction contract.
     */
    function createNewAuction(
        address _want,
        address _hook,
        address _governance,
        uint256 _auctionLength,
        uint256 _auctionCooldown
    ) external returns (address) {
        return
            _createNewAuction(
                _want,
                _hook,
                _governance,
                _auctionLength,
                _auctionCooldown,
                DEFAULT_STARTING_PRICE
            );
    }

    /**
     * @notice Creates a new auction contract.
     * @param _want Address of the token users will bid with.
     * @param _hook Address of the hook contract if any.
     * @param _governance Address allowed to enable and disable auctions.
     * @param _auctionLength Length of the auction in seconds.
     * @param _auctionCooldown Minimum time period between kicks in seconds.
     * @param _startingPrice Starting price for the auction (no decimals).
     *  NOTE: The starting price should be without decimals (1k == 1_000).
     * @return _newAuction Address of the newly created auction contract.
     */
    function createNewAuction(
        address _want,
        address _hook,
        address _governance,
        uint256 _auctionLength,
        uint256 _auctionCooldown,
        uint256 _startingPrice
    ) external returns (address) {
        return
            _createNewAuction(
                _want,
                _hook,
                _governance,
                _auctionLength,
                _auctionCooldown,
                _startingPrice
            );
    }

    /**
     * @dev Deploys and initializes a new Auction
     */
    function _createNewAuction(
        address _want,
        address _hook,
        address _governance,
        uint256 _auctionLength,
        uint256 _auctionCooldown,
        uint256 _startingPrice
    ) internal returns (address _newAuction) {
        _newAuction = _clone();

        Auction(_newAuction).initialize(
            _want,
            _hook,
            _governance,
            _auctionLength,
            _auctionCooldown,
            _startingPrice
        );

        auctions.push(_newAuction);

        emit DeployedNewAuction(_newAuction, _want);
    }

    /**
     * @notice Get the full list of auctions deployed through this factory.
     */
    function getAllAuctions() external view returns (address[] memory) {
        return auctions;
    }

    /**
     * @notice Get the total number of auctions deployed through this factory.
     */
    function numberOfAuctions() external view returns (uint256) {
        return auctions.length;
    }
}

// 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) (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 v4.9.0) (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: BUSL-1.1
pragma solidity >=0.6.12;
pragma experimental ABIEncoderV2;

library DataTypesV3 {
    struct ReserveDataLegacy {
        //stores the reserve configuration
        ReserveConfigurationMap configuration;
        //the liquidity index. Expressed in ray
        uint128 liquidityIndex;
        //the current supply rate. Expressed in ray
        uint128 currentLiquidityRate;
        //variable borrow index. Expressed in ray
        uint128 variableBorrowIndex;
        //the current variable borrow rate. Expressed in ray
        uint128 currentVariableBorrowRate;
        //the current stable borrow rate. Expressed in ray
        uint128 currentStableBorrowRate;
        //timestamp of last update
        uint40 lastUpdateTimestamp;
        //the id of the reserve. Represents the position in the list of the active reserves
        uint16 id;
        //aToken address
        address aTokenAddress;
        //stableDebtToken address
        address stableDebtTokenAddress;
        //variableDebtToken address
        address variableDebtTokenAddress;
        //address of the interest rate strategy
        address interestRateStrategyAddress;
        //the current treasury balance, scaled
        uint128 accruedToTreasury;
        //the outstanding unbacked aTokens minted through the bridging feature
        uint128 unbacked;
        //the outstanding debt borrowed against this asset in isolation mode
        uint128 isolationModeTotalDebt;
    }

    struct ReserveData {
        //stores the reserve configuration
        ReserveConfigurationMap configuration;
        //the liquidity index. Expressed in ray
        uint128 liquidityIndex;
        //the current supply rate. Expressed in ray
        uint128 currentLiquidityRate;
        //variable borrow index. Expressed in ray
        uint128 variableBorrowIndex;
        //the current variable borrow rate. Expressed in ray
        uint128 currentVariableBorrowRate;
        //the current stable borrow rate. Expressed in ray
        uint128 currentStableBorrowRate;
        //timestamp of last update
        uint40 lastUpdateTimestamp;
        //the id of the reserve. Represents the position in the list of the active reserves
        uint16 id;
        //timestamp until when liquidations are not allowed on the reserve, if set to past liquidations will be allowed
        uint40 liquidationGracePeriodUntil;
        //aToken address
        address aTokenAddress;
        //stableDebtToken address
        address stableDebtTokenAddress;
        //variableDebtToken address
        address variableDebtTokenAddress;
        //address of the interest rate strategy
        address interestRateStrategyAddress;
        //the current treasury balance, scaled
        uint128 accruedToTreasury;
        //the outstanding unbacked aTokens minted through the bridging feature
        uint128 unbacked;
        //the outstanding debt borrowed against this asset in isolation mode
        uint128 isolationModeTotalDebt;
        //the amount of underlying accounted for by the protocol
        uint128 virtualUnderlyingBalance;
    }

    struct ReserveConfigurationMap {
        //bit 0-15: LTV
        //bit 16-31: Liq. threshold
        //bit 32-47: Liq. bonus
        //bit 48-55: Decimals
        //bit 56: reserve is active
        //bit 57: reserve is frozen
        //bit 58: borrowing is enabled
        //bit 59: stable rate borrowing enabled
        //bit 60: asset is paused
        //bit 61: borrowing in isolation mode is enabled
        //bit 62-63: reserved
        //bit 64-79: reserve factor
        //bit 80-115 borrow cap in whole tokens, borrowCap == 0 => no cap
        //bit 116-151 supply cap in whole tokens, supplyCap == 0 => no cap
        //bit 152-167 liquidation protocol fee
        //bit 168-175 eMode category
        //bit 176-211 unbacked mint cap in whole tokens, unbackedMintCap == 0 => minting disabled
        //bit 212-251 debt ceiling for isolation mode with (ReserveConfiguration::DEBT_CEILING_DECIMALS) decimals
        //bit 252-255 unused

        uint256 data;
    }

    struct UserConfigurationMap {
        /**
         * @dev Bitmap of the users collaterals and borrows. It is divided in pairs of bits, one pair per asset.
         * The first bit indicates if an asset is used as collateral by the user, the second whether an
         * asset is borrowed by the user.
         */
        uint256 data;
    }

    struct EModeCategory {
        // each eMode category has a custom ltv and liquidation threshold
        uint16 ltv;
        uint16 liquidationThreshold;
        uint16 liquidationBonus;
        // each eMode category may or may not have a custom oracle to override the individual assets price oracles
        address priceSource;
        string label;
    }

    enum InterestRateMode {
        NONE,
        STABLE,
        VARIABLE
    }

    struct ReserveCache {
        uint256 currScaledVariableDebt;
        uint256 nextScaledVariableDebt;
        uint256 currPrincipalStableDebt;
        uint256 currAvgStableBorrowRate;
        uint256 currTotalStableDebt;
        uint256 nextAvgStableBorrowRate;
        uint256 nextTotalStableDebt;
        uint256 currLiquidityIndex;
        uint256 nextLiquidityIndex;
        uint256 currVariableBorrowIndex;
        uint256 nextVariableBorrowIndex;
        uint256 currLiquidityRate;
        uint256 currVariableBorrowRate;
        uint256 reserveFactor;
        ReserveConfigurationMap reserveConfiguration;
        address aTokenAddress;
        address stableDebtTokenAddress;
        address variableDebtTokenAddress;
        uint40 reserveLastUpdateTimestamp;
        uint40 stableDebtLastUpdateTimestamp;
    }

    struct ExecuteLiquidationCallParams {
        uint256 reservesCount;
        uint256 debtToCover;
        address collateralAsset;
        address debtAsset;
        address user;
        bool receiveAToken;
        address priceOracle;
        uint8 userEModeCategory;
        address priceOracleSentinel;
    }

    struct ExecuteSupplyParams {
        address asset;
        uint256 amount;
        address onBehalfOf;
        uint16 referralCode;
    }

    struct ExecuteBorrowParams {
        address asset;
        address user;
        address onBehalfOf;
        uint256 amount;
        InterestRateMode interestRateMode;
        uint16 referralCode;
        bool releaseUnderlying;
        uint256 maxStableRateBorrowSizePercent;
        uint256 reservesCount;
        address oracle;
        uint8 userEModeCategory;
        address priceOracleSentinel;
    }

    struct ExecuteRepayParams {
        address asset;
        uint256 amount;
        InterestRateMode interestRateMode;
        address onBehalfOf;
        bool useATokens;
    }

    struct ExecuteWithdrawParams {
        address asset;
        uint256 amount;
        address to;
        uint256 reservesCount;
        address oracle;
        uint8 userEModeCategory;
    }

    struct ExecuteSetUserEModeParams {
        uint256 reservesCount;
        address oracle;
        uint8 categoryId;
    }

    struct FinalizeTransferParams {
        address asset;
        address from;
        address to;
        uint256 amount;
        uint256 balanceFromBefore;
        uint256 balanceToBefore;
        uint256 reservesCount;
        address oracle;
        uint8 fromEModeCategory;
    }

    struct FlashloanParams {
        address receiverAddress;
        address[] assets;
        uint256[] amounts;
        uint256[] interestRateModes;
        address onBehalfOf;
        bytes params;
        uint16 referralCode;
        uint256 flashLoanPremiumToProtocol;
        uint256 flashLoanPremiumTotal;
        uint256 maxStableRateBorrowSizePercent;
        uint256 reservesCount;
        address addressesProvider;
        uint8 userEModeCategory;
        bool isAuthorizedFlashBorrower;
    }

    struct FlashloanSimpleParams {
        address receiverAddress;
        address asset;
        uint256 amount;
        bytes params;
        uint16 referralCode;
        uint256 flashLoanPremiumToProtocol;
        uint256 flashLoanPremiumTotal;
    }

    struct FlashLoanRepaymentParams {
        uint256 amount;
        uint256 totalPremium;
        uint256 flashLoanPremiumToProtocol;
        address asset;
        address receiverAddress;
        uint16 referralCode;
    }

    struct CalculateUserAccountDataParams {
        UserConfigurationMap userConfig;
        uint256 reservesCount;
        address user;
        address oracle;
        uint8 userEModeCategory;
    }

    struct ValidateBorrowParams {
        ReserveCache reserveCache;
        UserConfigurationMap userConfig;
        address asset;
        address userAddress;
        uint256 amount;
        InterestRateMode interestRateMode;
        uint256 maxStableLoanPercent;
        uint256 reservesCount;
        address oracle;
        uint8 userEModeCategory;
        address priceOracleSentinel;
        bool isolationModeActive;
        address isolationModeCollateralAddress;
        uint256 isolationModeDebtCeiling;
    }

    struct ValidateLiquidationCallParams {
        ReserveCache debtReserveCache;
        uint256 totalDebt;
        uint256 healthFactor;
        address priceOracleSentinel;
    }

    struct CalculateInterestRatesParams {
        uint256 unbacked;
        uint256 liquidityAdded;
        uint256 liquidityTaken;
        uint256 totalStableDebt;
        uint256 totalVariableDebt;
        uint256 averageStableBorrowRate;
        uint256 reserveFactor;
        address reserve;
        bool usingVirtualBalance;
        uint256 virtualUnderlyingBalance;
    }

    struct InitReserveParams {
        address asset;
        address aTokenAddress;
        address stableDebtAddress;
        address variableDebtAddress;
        address interestRateStrategyAddress;
        uint16 reservesCount;
        uint16 maxNumberReserves;
    }
}

// SPDX-License-Identifier: AGPL-3.0
pragma solidity >=0.6.12;

/**
 * @title IPoolAddressesProvider
 * @author Aave
 * @notice Defines the basic interface for a Pool Addresses Provider.
 **/
interface IPoolAddressesProvider {
    /**
     * @dev Emitted when the market identifier is updated.
     * @param oldMarketId The old id of the market
     * @param newMarketId The new id of the market
     */
    event MarketIdSet(string indexed oldMarketId, string indexed newMarketId);

    /**
     * @dev Emitted when the pool is updated.
     * @param oldAddress The old address of the Pool
     * @param newAddress The new address of the Pool
     */
    event PoolUpdated(address indexed oldAddress, address indexed newAddress);

    /**
     * @dev Emitted when the pool configurator is updated.
     * @param oldAddress The old address of the PoolConfigurator
     * @param newAddress The new address of the PoolConfigurator
     */
    event PoolConfiguratorUpdated(
        address indexed oldAddress,
        address indexed newAddress
    );

    /**
     * @dev Emitted when the price oracle is updated.
     * @param oldAddress The old address of the PriceOracle
     * @param newAddress The new address of the PriceOracle
     */
    event PriceOracleUpdated(
        address indexed oldAddress,
        address indexed newAddress
    );

    /**
     * @dev Emitted when the ACL manager is updated.
     * @param oldAddress The old address of the ACLManager
     * @param newAddress The new address of the ACLManager
     */
    event ACLManagerUpdated(
        address indexed oldAddress,
        address indexed newAddress
    );

    /**
     * @dev Emitted when the ACL admin is updated.
     * @param oldAddress The old address of the ACLAdmin
     * @param newAddress The new address of the ACLAdmin
     */
    event ACLAdminUpdated(
        address indexed oldAddress,
        address indexed newAddress
    );

    /**
     * @dev Emitted when the price oracle sentinel is updated.
     * @param oldAddress The old address of the PriceOracleSentinel
     * @param newAddress The new address of the PriceOracleSentinel
     */
    event PriceOracleSentinelUpdated(
        address indexed oldAddress,
        address indexed newAddress
    );

    /**
     * @dev Emitted when the pool data provider is updated.
     * @param oldAddress The old address of the PoolDataProvider
     * @param newAddress The new address of the PoolDataProvider
     */
    event PoolDataProviderUpdated(
        address indexed oldAddress,
        address indexed newAddress
    );

    /**
     * @dev Emitted when a new proxy is created.
     * @param id The identifier of the proxy
     * @param proxyAddress The address of the created proxy contract
     * @param implementationAddress The address of the implementation contract
     */
    event ProxyCreated(
        bytes32 indexed id,
        address indexed proxyAddress,
        address indexed implementationAddress
    );

    /**
     * @dev Emitted when a new non-proxied contract address is registered.
     * @param id The identifier of the contract
     * @param oldAddress The address of the old contract
     * @param newAddress The address of the new contract
     */
    event AddressSet(
        bytes32 indexed id,
        address indexed oldAddress,
        address indexed newAddress
    );

    /**
     * @dev Emitted when the implementation of the proxy registered with id is updated
     * @param id The identifier of the contract
     * @param proxyAddress The address of the proxy contract
     * @param oldImplementationAddress The address of the old implementation contract
     * @param newImplementationAddress The address of the new implementation contract
     */
    event AddressSetAsProxy(
        bytes32 indexed id,
        address indexed proxyAddress,
        address oldImplementationAddress,
        address indexed newImplementationAddress
    );

    /**
     * @notice Returns the id of the Aave market to which this contract points to.
     * @return The market id
     **/
    function getMarketId() external view returns (string memory);

    /**
     * @notice Associates an id with a specific PoolAddressesProvider.
     * @dev This can be used to create an onchain registry of PoolAddressesProviders to
     * identify and validate multiple Aave markets.
     * @param newMarketId The market id
     */
    function setMarketId(string calldata newMarketId) external;

    /**
     * @notice Returns an address by its identifier.
     * @dev The returned address might be an EOA or a contract, potentially proxied
     * @dev It returns ZERO if there is no registered address with the given id
     * @param id The id
     * @return The address of the registered for the specified id
     */
    function getAddress(bytes32 id) external view returns (address);

    /**
     * @notice General function to update the implementation of a proxy registered with
     * certain `id`. If there is no proxy registered, it will instantiate one and
     * set as implementation the `newImplementationAddress`.
     * @dev IMPORTANT Use this function carefully, only for ids that don't have an explicit
     * setter function, in order to avoid unexpected consequences
     * @param id The id
     * @param newImplementationAddress The address of the new implementation
     */
    function setAddressAsProxy(
        bytes32 id,
        address newImplementationAddress
    ) external;

    /**
     * @notice Sets an address for an id replacing the address saved in the addresses map.
     * @dev IMPORTANT Use this function carefully, as it will do a hard replacement
     * @param id The id
     * @param newAddress The address to set
     */
    function setAddress(bytes32 id, address newAddress) external;

    /**
     * @notice Returns the address of the Pool proxy.
     * @return The Pool proxy address
     **/
    function getPool() external view returns (address);

    /**
     * @notice Updates the implementation of the Pool, or creates a proxy
     * setting the new `pool` implementation when the function is called for the first time.
     * @param newPoolImpl The new Pool implementation
     **/
    function setPoolImpl(address newPoolImpl) external;

    /**
     * @notice Returns the address of the PoolConfigurator proxy.
     * @return The PoolConfigurator proxy address
     **/
    function getPoolConfigurator() external view returns (address);

    /**
     * @notice Updates the implementation of the PoolConfigurator, or creates a proxy
     * setting the new `PoolConfigurator` implementation when the function is called for the first time.
     * @param newPoolConfiguratorImpl The new PoolConfigurator implementation
     **/
    function setPoolConfiguratorImpl(address newPoolConfiguratorImpl) external;

    /**
     * @notice Returns the address of the price oracle.
     * @return The address of the PriceOracle
     */
    function getPriceOracle() external view returns (address);

    /**
     * @notice Updates the address of the price oracle.
     * @param newPriceOracle The address of the new PriceOracle
     */
    function setPriceOracle(address newPriceOracle) external;

    /**
     * @notice Returns the address of the ACL manager.
     * @return The address of the ACLManager
     */
    function getACLManager() external view returns (address);

    /**
     * @notice Updates the address of the ACL manager.
     * @param newAclManager The address of the new ACLManager
     **/
    function setACLManager(address newAclManager) external;

    /**
     * @notice Returns the address of the ACL admin.
     * @return The address of the ACL admin
     */
    function getACLAdmin() external view returns (address);

    /**
     * @notice Updates the address of the ACL admin.
     * @param newAclAdmin The address of the new ACL admin
     */
    function setACLAdmin(address newAclAdmin) external;

    /**
     * @notice Returns the address of the price oracle sentinel.
     * @return The address of the PriceOracleSentinel
     */
    function getPriceOracleSentinel() external view returns (address);

    /**
     * @notice Updates the address of the price oracle sentinel.
     * @param newPriceOracleSentinel The address of the new PriceOracleSentinel
     **/
    function setPriceOracleSentinel(address newPriceOracleSentinel) external;

    /**
     * @notice Returns the address of the data provider.
     * @return The address of the DataProvider
     */
    function getPoolDataProvider() external view returns (address);

    /**
     * @notice Updates the address of the data provider.
     * @param newDataProvider The address of the new DataProvider
     **/
    function setPoolDataProvider(address newDataProvider) external;
}

// SPDX-License-Identifier: AGPL-3.0
pragma solidity >=0.6.12;

/**
 * @title IScaledBalanceToken
 * @author Aave
 * @notice Defines the basic interface for a scaledbalance token.
 **/
interface IScaledBalanceToken {
    /**
     * @dev Emitted after the mint action
     * @param caller The address performing the mint
     * @param onBehalfOf The address of the user that will receive the minted scaled balance tokens
     * @param value The amount being minted (user entered amount + balance increase from interest)
     * @param balanceIncrease The increase in balance since the last action of the user
     * @param index The next liquidity index of the reserve
     **/
    event Mint(
        address indexed caller,
        address indexed onBehalfOf,
        uint256 value,
        uint256 balanceIncrease,
        uint256 index
    );

    /**
     * @dev Emitted after scaled balance tokens are burned
     * @param from The address from which the scaled tokens will be burned
     * @param target The address that will receive the underlying, if any
     * @param value The amount being burned (user entered amount - balance increase from interest)
     * @param balanceIncrease The increase in balance since the last action of the user
     * @param index The next liquidity index of the reserve
     **/
    event Burn(
        address indexed from,
        address indexed target,
        uint256 value,
        uint256 balanceIncrease,
        uint256 index
    );

    /**
     * @notice Returns the scaled balance of the user.
     * @dev The scaled balance is the sum of all the updated stored balance divided by the reserve's liquidity index
     * at the moment of the update
     * @param user The user whose balance is calculated
     * @return The scaled balance of the user
     **/
    function scaledBalanceOf(address user) external view returns (uint256);

    /**
     * @notice Returns the scaled balance of the user and the scaled total supply.
     * @param user The address of the user
     * @return The scaled balance of the user
     * @return The scaled total supply
     **/
    function getScaledUserBalanceAndSupply(
        address user
    ) external view returns (uint256, uint256);

    /**
     * @notice Returns the scaled total supply of the scaled balance token. Represents sum(debt/index)
     * @return The scaled total supply
     **/
    function scaledTotalSupply() external view returns (uint256);

    /**
     * @notice Returns last index interest was accrued to the user's balance
     * @param user The address of the user
     * @return The last index interest was accrued to the user's balance, expressed in ray
     **/
    function getPreviousIndex(address user) external view returns (uint256);
}

// 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: GPL-2.0-or-later
pragma solidity >=0.5.0;

/// @title Callback for IUniswapV3PoolActions#swap
/// @notice Any contract that calls IUniswapV3PoolActions#swap must implement this interface
interface IUniswapV3SwapCallback {
    /// @notice Called to `msg.sender` after executing a swap via IUniswapV3Pool#swap.
    /// @dev In the implementation you must pay the pool tokens owed for the swap.
    /// The caller of this method must be checked to be a UniswapV3Pool deployed by the canonical UniswapV3Factory.
    /// amount0Delta and amount1Delta can both be 0 if no tokens were swapped.
    /// @param amount0Delta The amount of token0 that was sent (negative) or must be received (positive) by the pool by
    /// the end of the swap. If positive, the callback must send that amount of token0 to the pool.
    /// @param amount1Delta The amount of token1 that was sent (negative) or must be received (positive) by the pool by
    /// the end of the swap. If positive, the callback must send that amount of token1 to the pool.
    /// @param data Any data passed through by the caller via the IUniswapV3PoolActions#swap call
    function uniswapV3SwapCallback(
        int256 amount0Delta,
        int256 amount1Delta,
        bytes calldata data
    ) external;
}

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

contract Clonable {
    /// @notice Set to the address to auto clone from.
    address public original;

    /**
     * @notice Clone the contracts default `original` contract.
     * @return Address of the new Minimal Proxy clone.
     */
    function _clone() internal virtual returns (address) {
        return _clone(original);
    }

    /**
     * @notice Clone any `_original` contract.
     * @return _newContract Address of the new Minimal Proxy clone.
     */
    function _clone(
        address _original
    ) internal virtual returns (address _newContract) {
        // Copied from https://github.com/optionality/clone-factory/blob/master/contracts/CloneFactory.sol
        bytes20 addressBytes = bytes20(_original);
        assembly {
            // EIP-1167 bytecode
            let clone_code := mload(0x40)
            mstore(
                clone_code,
                0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000
            )
            mstore(add(clone_code, 0x14), addressBytes)
            mstore(
                add(clone_code, 0x28),
                0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000
            )
            _newContract := create(0, clone_code, 0x37)
        }
    }
}

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

import {Maths} from "../libraries/Maths.sol";
import {Governance} from "../utils/Governance.sol";
import {ERC20} from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import {ReentrancyGuard} from "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import {ITaker} from "../interfaces/ITaker.sol";

/// @notice Interface that the optional `hook` contract should implement if the non-standard logic is desired.
interface IHook {
    function kickable(address _fromToken) external view returns (uint256);

    function auctionKicked(address _fromToken) external returns (uint256);

    function preTake(
        address _fromToken,
        uint256 _amountToTake,
        uint256 _amountToPay
    ) external;

    function postTake(
        address _toToken,
        uint256 _amountTaken,
        uint256 _amountPayed
    ) external;
}

/**
 *   @title Auction
 *   @author yearn.fi
 *   @notice General use dutch auction contract for token sales.
 */
contract Auction is Governance, ReentrancyGuard {
    using SafeERC20 for ERC20;

    /// @notice Emitted when a new auction is enabled
    event AuctionEnabled(
        bytes32 auctionId,
        address indexed from,
        address indexed to,
        address indexed auctionAddress
    );

    /// @notice Emitted when an auction is disabled.
    event AuctionDisabled(
        bytes32 auctionId,
        address indexed from,
        address indexed to,
        address indexed auctionAddress
    );

    /// @notice Emitted when auction has been kicked.
    event AuctionKicked(bytes32 auctionId, uint256 available);

    /// @notice Emitted when any amount of an active auction was taken.
    event AuctionTaken(
        bytes32 auctionId,
        uint256 amountTaken,
        uint256 amountLeft
    );

    /// @dev Store address and scaler in one slot.
    struct TokenInfo {
        address tokenAddress;
        uint96 scaler;
    }

    /// @notice Store all the auction specific information.
    struct AuctionInfo {
        TokenInfo fromInfo;
        uint96 kicked;
        address receiver;
        uint128 initialAvailable;
        uint128 currentAvailable;
    }

    /// @notice Store the hook address and each flag in one slot.
    struct Hook {
        address hook;
        bool kickable;
        bool kick;
        bool preTake;
        bool postTake;
    }

    uint256 internal constant WAD = 1e18;

    /// @notice Used for the price decay.
    uint256 internal constant MINUTE_HALF_LIFE =
        0.988514020352896135_356867505 * 1e27; // 0.5^(1/60)

    /// @notice Struct to hold the info for `want`.
    TokenInfo internal wantInfo;

    /// @notice Contract to call during write functions.
    Hook internal hook_;

    /// @notice The amount to start the auction at.
    uint256 public startingPrice;

    /// @notice The time that each auction lasts.
    uint256 public auctionLength;

    /// @notice The minimum time to wait between auction 'kicks'.
    uint256 public auctionCooldown;

    /// @notice Mapping from an auction ID to its struct.
    mapping(bytes32 => AuctionInfo) public auctions;

    /// @notice Array of all the enabled auction for this contract.
    bytes32[] public enabledAuctions;

    constructor() Governance(msg.sender) {}

    /**
     * @notice Initializes the Auction contract with initial parameters.
     * @param _want Address this auction is selling to.
     * @param _hook Address of the hook contract (optional).
     * @param _governance Address of the contract governance.
     * @param _auctionLength Duration of each auction in seconds.
     * @param _auctionCooldown Cooldown period between auctions in seconds.
     * @param _startingPrice Starting price for each auction.
     */
    function initialize(
        address _want,
        address _hook,
        address _governance,
        uint256 _auctionLength,
        uint256 _auctionCooldown,
        uint256 _startingPrice
    ) external virtual {
        require(auctionLength == 0, "initialized");
        require(_want != address(0), "ZERO ADDRESS");
        require(_auctionLength != 0, "length");
        require(_auctionLength <= _auctionCooldown, "cooldown");
        require(_startingPrice != 0, "starting price");

        // Cannot have more than 18 decimals.
        uint256 decimals = ERC20(_want).decimals();
        require(decimals <= 18, "unsupported decimals");

        // Set variables
        wantInfo = TokenInfo({
            tokenAddress: _want,
            scaler: uint96(WAD / 10 ** decimals)
        });

        // If we are using a hook.
        if (_hook != address(0)) {
            // All flags default to true.
            hook_ = Hook({
                hook: _hook,
                kickable: true,
                kick: true,
                preTake: true,
                postTake: true
            });
        }

        governance = _governance;
        auctionLength = _auctionLength;
        auctionCooldown = _auctionCooldown;
        startingPrice = _startingPrice;
    }

    /*//////////////////////////////////////////////////////////////
                         VIEW METHODS
    //////////////////////////////////////////////////////////////*/

    /**
     * @notice Get the address of this auctions want token.
     * @return . The want token.
     */
    function want() public view virtual returns (address) {
        return wantInfo.tokenAddress;
    }

    /**
     * @notice Get the address of the hook if any.
     * @return . The hook.
     */
    function hook() external view virtual returns (address) {
        return hook_.hook;
    }

    /**
     * @notice Get the current status of which hooks are being used.
     * @return . If the kickable hook is used.
     * @return . If the kick hook is used.
     * @return . If the preTake hook is used.
     * @return . If the postTake hook is used.
     */
    function getHookFlags()
        external
        view
        virtual
        returns (bool, bool, bool, bool)
    {
        Hook memory _hook = hook_;
        return (_hook.kickable, _hook.kick, _hook.preTake, _hook.postTake);
    }

    /**
     * @notice Get the length of the enabled auctions array.
     */
    function numberOfEnabledAuctions() external view virtual returns (uint256) {
        return enabledAuctions.length;
    }

    /**
     * @notice Get the unique auction identifier.
     * @param _from The address of the token to sell.
     * @return bytes32 A unique auction identifier.
     */
    function getAuctionId(address _from) public view virtual returns (bytes32) {
        return keccak256(abi.encodePacked(_from, want(), address(this)));
    }

    /**
     * @notice Retrieves information about a specific auction.
     * @param _auctionId The unique identifier of the auction.
     * @return _from The address of the token to sell.
     * @return _to The address of the token to buy.
     * @return _kicked The timestamp of the last kick.
     * @return _available The current available amount for the auction.
     */
    function auctionInfo(
        bytes32 _auctionId
    )
        public
        view
        virtual
        returns (
            address _from,
            address _to,
            uint256 _kicked,
            uint256 _available
        )
    {
        AuctionInfo memory auction = auctions[_auctionId];

        return (
            auction.fromInfo.tokenAddress,
            want(),
            auction.kicked,
            auction.kicked + auctionLength > block.timestamp
                ? auction.currentAvailable
                : 0
        );
    }

    /**
     * @notice Get the pending amount available for the next auction.
     * @dev Defaults to the auctions balance of the from token if no hook.
     * @param _auctionId The unique identifier of the auction.
     * @return uint256 The amount that can be kicked into the auction.
     */
    function kickable(
        bytes32 _auctionId
    ) external view virtual returns (uint256) {
        // If not enough time has passed then `kickable` is 0.
        if (auctions[_auctionId].kicked + auctionCooldown > block.timestamp) {
            return 0;
        }

        // Check if we have a hook to call.
        Hook memory _hook = hook_;
        if (_hook.kickable) {
            // If so default to the hooks logic.
            return
                IHook(_hook.hook).kickable(
                    auctions[_auctionId].fromInfo.tokenAddress
                );
        } else {
            // Else just use the full balance of this contract.
            return
                ERC20(auctions[_auctionId].fromInfo.tokenAddress).balanceOf(
                    address(this)
                );
        }
    }

    /**
     * @notice Gets the amount of `want` needed to buy a specific amount of `from`.
     * @param _auctionId The unique identifier of the auction.
     * @param _amountToTake The amount of `from` to take in the auction.
     * @return . The amount of `want` needed to fulfill the take amount.
     */
    function getAmountNeeded(
        bytes32 _auctionId,
        uint256 _amountToTake
    ) external view virtual returns (uint256) {
        return
            _getAmountNeeded(
                auctions[_auctionId],
                _amountToTake,
                block.timestamp
            );
    }

    /**
     * @notice Gets the amount of `want` needed to buy a specific amount of `from` at a specific timestamp.
     * @param _auctionId The unique identifier of the auction.
     * @param _amountToTake The amount `from` to take in the auction.
     * @param _timestamp The specific timestamp for calculating the amount needed.
     * @return . The amount of `want` needed to fulfill the take amount.
     */
    function getAmountNeeded(
        bytes32 _auctionId,
        uint256 _amountToTake,
        uint256 _timestamp
    ) external view virtual returns (uint256) {
        return
            _getAmountNeeded(auctions[_auctionId], _amountToTake, _timestamp);
    }

    /**
     * @dev Return the amount of `want` needed to buy `_amountToTake`.
     */
    function _getAmountNeeded(
        AuctionInfo memory _auction,
        uint256 _amountToTake,
        uint256 _timestamp
    ) internal view virtual returns (uint256) {
        return
            // Scale _amountToTake to 1e18
            (_amountToTake *
                _auction.fromInfo.scaler *
                // Price is always 1e18
                _price(
                    _auction.kicked,
                    _auction.initialAvailable * _auction.fromInfo.scaler,
                    _timestamp
                )) /
            1e18 /
            // Scale back down to want.
            wantInfo.scaler;
    }

    /**
     * @notice Gets the price of the auction at the current timestamp.
     * @param _auctionId The unique identifier of the auction.
     * @return . The price of the auction.
     */
    function price(bytes32 _auctionId) external view virtual returns (uint256) {
        return price(_auctionId, block.timestamp);
    }

    /**
     * @notice Gets the price of the auction at a specific timestamp.
     * @param _auctionId The unique identifier of the auction.
     * @param _timestamp The specific timestamp for calculating the price.
     * @return . The price of the auction.
     */
    function price(
        bytes32 _auctionId,
        uint256 _timestamp
    ) public view virtual returns (uint256) {
        // Get unscaled price and scale it down.
        return
            _price(
                auctions[_auctionId].kicked,
                auctions[_auctionId].initialAvailable *
                    auctions[_auctionId].fromInfo.scaler,
                _timestamp
            ) / wantInfo.scaler;
    }

    /**
     * @dev Internal function to calculate the scaled price based on auction parameters.
     * @param _kicked The timestamp the auction was kicked.
     * @param _available The initial available amount scaled 1e18.
     * @param _timestamp The specific timestamp for calculating the price.
     * @return . The calculated price scaled to 1e18.
     */
    function _price(
        uint256 _kicked,
        uint256 _available,
        uint256 _timestamp
    ) internal view virtual returns (uint256) {
        if (_available == 0) return 0;

        uint256 secondsElapsed = _timestamp - _kicked;

        if (secondsElapsed > auctionLength) return 0;

        // Exponential decay from https://github.com/ajna-finance/ajna-core/blob/master/src/libraries/helpers/PoolHelper.sol
        uint256 hoursComponent = 1e27 >> (secondsElapsed / 3600);
        uint256 minutesComponent = Maths.rpow(
            MINUTE_HALF_LIFE,
            (secondsElapsed % 3600) / 60
        );
        uint256 initialPrice = Maths.wdiv(startingPrice * 1e18, _available);

        return
            (initialPrice * Maths.rmul(hoursComponent, minutesComponent)) /
            1e27;
    }

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

    /**
     * @notice Enables a new auction.
     * @dev Uses governance as the receiver.
     * @param _from The address of the token to be auctioned.
     * @return . The unique identifier of the enabled auction.
     */
    function enable(address _from) external virtual returns (bytes32) {
        return enable(_from, msg.sender);
    }

    /**
     * @notice Enables a new auction.
     * @param _from The address of the token to be auctioned.
     * @param _receiver The address that will receive the funds in the auction.
     * @return _auctionId The unique identifier of the enabled auction.
     */
    function enable(
        address _from,
        address _receiver
    ) public virtual onlyGovernance returns (bytes32 _auctionId) {
        address _want = want();
        require(_from != address(0) && _from != _want, "ZERO ADDRESS");
        require(
            _receiver != address(0) && _receiver != address(this),
            "receiver"
        );
        // Cannot have more than 18 decimals.
        uint256 decimals = ERC20(_from).decimals();
        require(decimals <= 18, "unsupported decimals");

        // Calculate the id.
        _auctionId = getAuctionId(_from);

        require(
            auctions[_auctionId].fromInfo.tokenAddress == address(0),
            "already enabled"
        );

        // Store all needed info.
        auctions[_auctionId].fromInfo = TokenInfo({
            tokenAddress: _from,
            scaler: uint96(WAD / 10 ** decimals)
        });
        auctions[_auctionId].receiver = _receiver;

        // Add to the array.
        enabledAuctions.push(_auctionId);

        emit AuctionEnabled(_auctionId, _from, _want, address(this));
    }

    /**
     * @notice Disables an existing auction.
     * @dev Only callable by governance.
     * @param _from The address of the token being sold.
     */
    function disable(address _from) external virtual {
        disable(_from, 0);
    }

    /**
     * @notice Disables an existing auction.
     * @dev Only callable by governance.
     * @param _from The address of the token being sold.
     * @param _index The index the auctionId is at in the array.
     */
    function disable(
        address _from,
        uint256 _index
    ) public virtual onlyGovernance {
        bytes32 _auctionId = getAuctionId(_from);

        // Make sure the auction was enabled.
        require(
            auctions[_auctionId].fromInfo.tokenAddress != address(0),
            "not enabled"
        );

        // Remove the struct.
        delete auctions[_auctionId];

        // Remove the auction ID from the array.
        bytes32[] memory _enabledAuctions = enabledAuctions;
        if (_enabledAuctions[_index] != _auctionId) {
            // If the _index given is not the id find it.
            for (uint256 i = 0; i < _enabledAuctions.length; ++i) {
                if (_enabledAuctions[i] == _auctionId) {
                    _index = i;
                    break;
                }
            }
        }

        // Move the id to the last spot if not there.
        if (_index < _enabledAuctions.length - 1) {
            _enabledAuctions[_index] = _enabledAuctions[
                _enabledAuctions.length - 1
            ];
            // Update the array.
            enabledAuctions = _enabledAuctions;
        }

        // Pop the id off the array.
        enabledAuctions.pop();

        emit AuctionDisabled(_auctionId, _from, want(), address(this));
    }

    /**
     * @notice Set the flags to be used with hook.
     * @param _kickable If the kickable hook should be used.
     * @param _kick If the kick hook should be used.
     * @param _preTake If the preTake hook should be used.
     * @param _postTake If the postTake should be used.
     */
    function setHookFlags(
        bool _kickable,
        bool _kick,
        bool _preTake,
        bool _postTake
    ) external virtual onlyGovernance {
        address _hook = hook_.hook;
        require(_hook != address(0), "no hook set");

        hook_ = Hook({
            hook: _hook,
            kickable: _kickable,
            kick: _kick,
            preTake: _preTake,
            postTake: _postTake
        });
    }

    /*//////////////////////////////////////////////////////////////
                      PARTICIPATE IN AUCTION
    //////////////////////////////////////////////////////////////*/

    /**
     * @notice Kicks off an auction, updating its status and making funds available for bidding.
     * @param _auctionId The unique identifier of the auction.
     * @return available The available amount for bidding on in the auction.
     */
    function kick(
        bytes32 _auctionId
    ) external virtual nonReentrant returns (uint256 available) {
        address _fromToken = auctions[_auctionId].fromInfo.tokenAddress;
        require(_fromToken != address(0), "not enabled");
        require(
            block.timestamp > auctions[_auctionId].kicked + auctionCooldown,
            "too soon"
        );

        Hook memory _hook = hook_;
        // Use hook if defined.
        if (_hook.kick) {
            available = IHook(_hook.hook).auctionKicked(_fromToken);
        } else {
            // Else just use current balance.
            available = ERC20(_fromToken).balanceOf(address(this));
        }

        require(available != 0, "nothing to kick");

        // Update the auctions status.
        auctions[_auctionId].kicked = uint96(block.timestamp);
        auctions[_auctionId].initialAvailable = uint128(available);
        auctions[_auctionId].currentAvailable = uint128(available);

        emit AuctionKicked(_auctionId, available);
    }

    /**
     * @notice Take the token being sold in a live auction.
     * @dev Defaults to taking the full amount and sending to the msg sender.
     * @param _auctionId The unique identifier of the auction.
     * @return . The amount of fromToken taken in the auction.
     */
    function take(bytes32 _auctionId) external virtual returns (uint256) {
        return _take(_auctionId, type(uint256).max, msg.sender, new bytes(0));
    }

    /**
     * @notice Take the token being sold in a live auction with a specified maximum amount.
     * @dev Uses the sender's address as the receiver.
     * @param _auctionId The unique identifier of the auction.
     * @param _maxAmount The maximum amount of fromToken to take in the auction.
     * @return . The amount of fromToken taken in the auction.
     */
    function take(
        bytes32 _auctionId,
        uint256 _maxAmount
    ) external virtual returns (uint256) {
        return _take(_auctionId, _maxAmount, msg.sender, new bytes(0));
    }

    /**
     * @notice Take the token being sold in a live auction.
     * @param _auctionId The unique identifier of the auction.
     * @param _maxAmount The maximum amount of fromToken to take in the auction.
     * @param _receiver The address that will receive the fromToken.
     * @return _amountTaken The amount of fromToken taken in the auction.
     */
    function take(
        bytes32 _auctionId,
        uint256 _maxAmount,
        address _receiver
    ) external virtual returns (uint256) {
        return _take(_auctionId, _maxAmount, _receiver, new bytes(0));
    }

    /**
     * @notice Take the token being sold in a live auction.
     * @param _auctionId The unique identifier of the auction.
     * @param _maxAmount The maximum amount of fromToken to take in the auction.
     * @param _receiver The address that will receive the fromToken.
     * @param _data The data signify the callback should be used and sent with it.
     * @return _amountTaken The amount of fromToken taken in the auction.
     */
    function take(
        bytes32 _auctionId,
        uint256 _maxAmount,
        address _receiver,
        bytes calldata _data
    ) external virtual returns (uint256) {
        return _take(_auctionId, _maxAmount, _receiver, _data);
    }

    /// @dev Implements the take of the auction.
    function _take(
        bytes32 _auctionId,
        uint256 _maxAmount,
        address _receiver,
        bytes memory _data
    ) internal virtual nonReentrant returns (uint256 _amountTaken) {
        AuctionInfo memory auction = auctions[_auctionId];
        // Make sure the auction is active.
        require(
            auction.kicked + auctionLength >= block.timestamp,
            "not kicked"
        );

        // Max amount that can be taken.
        _amountTaken = auction.currentAvailable > _maxAmount
            ? _maxAmount
            : auction.currentAvailable;

        // Get the amount needed
        uint256 needed = _getAmountNeeded(
            auction,
            _amountTaken,
            block.timestamp
        );

        require(needed != 0, "zero needed");

        // How much is left in this auction.
        uint256 left;
        unchecked {
            left = auction.currentAvailable - _amountTaken;
        }
        auctions[_auctionId].currentAvailable = uint128(left);

        Hook memory _hook = hook_;
        if (_hook.preTake) {
            // Use hook if defined.
            IHook(_hook.hook).preTake(
                auction.fromInfo.tokenAddress,
                _amountTaken,
                needed
            );
        }

        // Send `from`.
        ERC20(auction.fromInfo.tokenAddress).safeTransfer(
            _receiver,
            _amountTaken
        );

        // If the caller has specified data.
        if (_data.length != 0) {
            // Do the callback.
            ITaker(_receiver).auctionTakeCallback(
                _auctionId,
                msg.sender,
                _amountTaken,
                needed,
                _data
            );
        }

        // Cache the want address.
        address _want = want();

        // Pull `want`.
        ERC20(_want).safeTransferFrom(msg.sender, auction.receiver, needed);

        // Post take hook if defined.
        if (_hook.postTake) {
            IHook(_hook.hook).postTake(_want, _amountTaken, needed);
        }

        emit AuctionTaken(_auctionId, _amountTaken, left);
    }
}

// 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 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 v4.8.0) (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
     * ====
     *
     * [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://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");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

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

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

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/draft-IERC20Permit.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (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 (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;
    }
}

// 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: AGPL-3.0
pragma solidity >=0.8.18;

interface ITaker {
    function auctionTakeCallback(
        bytes32 _auctionId,
        address _sender,
        uint256 _amountTaken,
        uint256 _amountNeeded,
        bytes calldata _data
    ) external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;

/**
 * @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() {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

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

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

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

// 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: GPL-3.0-or-later
pragma solidity >=0.8.18;

// Math library from https://github.com/ajna-finance/ajna-core/blob/master/src/libraries/internal/Maths.sol

/**
    @title  Maths library
    @notice Internal library containing common maths.
 */
library Maths {
    uint256 internal constant WAD = 1e18;
    uint256 internal constant RAY = 1e27;

    function wmul(uint256 x, uint256 y) internal pure returns (uint256) {
        return (x * y + WAD / 2) / WAD;
    }

    function floorWmul(uint256 x, uint256 y) internal pure returns (uint256) {
        return (x * y) / WAD;
    }

    function ceilWmul(uint256 x, uint256 y) internal pure returns (uint256) {
        return (x * y + WAD - 1) / WAD;
    }

    function wdiv(uint256 x, uint256 y) internal pure returns (uint256) {
        return (x * WAD + y / 2) / y;
    }

    function floorWdiv(uint256 x, uint256 y) internal pure returns (uint256) {
        return (x * WAD) / y;
    }

    function ceilWdiv(uint256 x, uint256 y) internal pure returns (uint256) {
        return (x * WAD + y - 1) / y;
    }

    function ceilDiv(uint256 x, uint256 y) internal pure returns (uint256) {
        return (x + y - 1) / y;
    }

    function max(uint256 x, uint256 y) internal pure returns (uint256) {
        return x >= y ? x : y;
    }

    function min(uint256 x, uint256 y) internal pure returns (uint256) {
        return x <= y ? x : y;
    }

    function wad(uint256 x) internal pure returns (uint256) {
        return x * WAD;
    }

    function rmul(uint256 x, uint256 y) internal pure returns (uint256) {
        return (x * y + RAY / 2) / RAY;
    }

    function rpow(uint256 x, uint256 n) internal pure returns (uint256 z) {
        z = n % 2 != 0 ? x : RAY;

        for (n /= 2; n != 0; n /= 2) {
            x = rmul(x, x);

            if (n % 2 != 0) {
                z = rmul(z, x);
            }
        }
    }

    /*************************/
    /*** Integer Functions ***/
    /*************************/

    function maxInt(int256 x, int256 y) internal pure returns (int256) {
        return x >= y ? x : y;
    }

    function minInt(int256 x, int256 y) internal pure returns (int256) {
        return x <= y ? x : y;
    }
}

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

• No Contract Security Audit Submitted- Submit Audit Here

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000000000000000000000000dac17f958d2ee523a2206206994597c13d831ec700000000000000000000000000000000000000000000000000000000000000a000000000000000000000000087870bca3f3fd6335c3f4ce8392d69350b4fa4e2000000000000000000000000e592427a0aece92de3edee1f18e0157c05861564000000000000000000000000c02aaa39b223fe8d0a0e5c4f27ead9083c756cc20000000000000000000000000000000000000000000000000000000000000013416176652056332055534454204c656e64657200000000000000000000000000

-----Decoded View---------------
Arg [0] : _asset (address): 0xdAC17F958D2ee523a2206206994597C13D831ec7
Arg [1] : _name (string): Aave V3 USDT Lender
Arg [2] : _lendingPool (address): 0x87870Bca3F3fD6335C3F4ce8392D69350B4fA4E2
Arg [3] : _router (address): 0xE592427A0AEce92De3Edee1F18E0157C05861564
Arg [4] : _base (address): 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2

-----Encoded View---------------
7 Constructor Arguments found :
Arg [0] : 000000000000000000000000dac17f958d2ee523a2206206994597c13d831ec7
Arg [1] : 00000000000000000000000000000000000000000000000000000000000000a0
Arg [2] : 00000000000000000000000087870bca3f3fd6335c3f4ce8392d69350b4fa4e2
Arg [3] : 000000000000000000000000e592427a0aece92de3edee1f18e0157c05861564
Arg [4] : 000000000000000000000000c02aaa39b223fe8d0a0e5c4f27ead9083c756cc2
Arg [5] : 0000000000000000000000000000000000000000000000000000000000000013
Arg [6] : 416176652056332055534454204c656e64657200000000000000000000000000