Contract Source Code (Solidity Standard Json-Input format)

IDE

• Blockscan IDE
• 🤖 Code ReaderBeta
• Remix IDE

More Options

• Similar
• Sol2Uml
• Submit Audit
• Compare

// SPDX-FileCopyrightText: 2021 Lido <[email protected]>

// SPDX-License-Identifier: GPL-3.0

/* See contracts/COMPILERS.md */
pragma solidity 0.8.9;

import "@openzeppelin/contracts-v4.4/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts-v4.4/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts-v4.4/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts-v4.4/utils/introspection/ERC165.sol";
import "@openzeppelin/contracts-v4.4/utils/math/Math.sol";
import "./interfaces/IBeaconReportReceiver.sol";
import "./interfaces/ISelfOwnedStETHBurner.sol";

/**
  * @title Interface defining a Lido liquid staking pool
  * @dev see also [Lido liquid staking pool core contract](https://docs.lido.fi/contracts/lido)
  */
interface ILido {
    /**
      * @notice Destroys given amount of shares from account's holdings
      * @param _account address of the shares holder
      * @param _sharesAmount shares amount to burn
      * @dev incurs stETH token rebase by decreasing the total amount of shares.
      */
    function burnShares(address _account, uint256 _sharesAmount) external returns (uint256 newTotalShares);

    /**
      * @notice Gets authorized oracle address
      * @return address of oracle contract.
      */
    function getOracle() external view returns (address);

    /**
      * @notice Get stETH amount by the provided shares amount
      * @param _sharesAmount shares amount
      * @dev dual to `getSharesByPooledEth`.
      */
    function getPooledEthByShares(uint256 _sharesAmount) external view returns (uint256);

    /**
      * @notice Get shares amount by the provided stETH amount
      * @param _pooledEthAmount stETH amount
      * @dev dual to `getPooledEthByShares`.
      */
    function getSharesByPooledEth(uint256 _pooledEthAmount) external view returns (uint256);

    /**
      * @notice Get shares amount of the provided account
      * @param _account provided account address.
      */
    function sharesOf(address _account) external view returns (uint256);

    /**
      * @notice Get total amount of shares in existence
      */
    function getTotalShares() external view returns (uint256);
}

/**
  * @title Interface for the Lido Beacon Chain Oracle
  */
interface IOracle {
    /**
     * @notice Gets currently set beacon report receiver
     * @return address of a beacon receiver
     */
    function getBeaconReportReceiver() external view returns (address);
}

/**
  * @title A dedicated contract for enacting stETH burning requests
  * @notice See the Lido improvement proposal #6 (LIP-6) spec.
  * @author Eugene Mamin <[email protected]>
  *
  * @dev Burning stETH means 'decrease total underlying shares amount to perform stETH token rebase'
  */
contract SelfOwnedStETHBurner is ISelfOwnedStETHBurner, IBeaconReportReceiver, ERC165 {
    using SafeERC20 for IERC20;

    uint256 private constant MAX_BASIS_POINTS = 10000;

    uint256 private coverSharesBurnRequested;
    uint256 private nonCoverSharesBurnRequested;

    uint256 private totalCoverSharesBurnt;
    uint256 private totalNonCoverSharesBurnt;

    uint256 private maxBurnAmountPerRunBasisPoints = 4; // 0.04% by default for the biggest `stETH:ETH` curve pool

    address public immutable LIDO;
    address public immutable TREASURY;
    address public immutable VOTING;

    /**
      * Emitted when a new single burn quota is set
      */
    event BurnAmountPerRunQuotaChanged(
        uint256 maxBurnAmountPerRunBasisPoints
    );

    /**
      * Emitted when a new stETH burning request is added by the `requestedBy` address.
      */
    event StETHBurnRequested(
        bool indexed isCover,
        address indexed requestedBy,
        uint256 amount,
        uint256 sharesAmount
    );

    /**
      * Emitted when the stETH `amount` (corresponding to `sharesAmount` shares) burnt for the `isCover` reason.
      */
    event StETHBurnt(
        bool indexed isCover,
        uint256 amount,
        uint256 sharesAmount
    );

    /**
      * Emitted when the excessive stETH `amount` (corresponding to `sharesAmount` shares) recovered (i.e. transferred)
      * to the Lido treasure address by `requestedBy` sender.
      */
    event ExcessStETHRecovered(
        address indexed requestedBy,
        uint256 amount,
        uint256 sharesAmount
    );

    /**
      * Emitted when the ERC20 `token` recovered (i.e. transferred)
      * to the Lido treasure address by `requestedBy` sender.
      */
    event ERC20Recovered(
        address indexed requestedBy,
        address indexed token,
        uint256 amount
    );

    /**
      * Emitted when the ERC721-compatible `token` (NFT) recovered (i.e. transferred)
      * to the Lido treasure address by `requestedBy` sender.
      */
    event ERC721Recovered(
        address indexed requestedBy,
        address indexed token,
        uint256 tokenId
    );

    /**
      * Ctor
      *
      * @param _treasury the Lido treasury address (see StETH/ERC20/ERC721-recovery interfaces)
      * @param _lido the Lido token (stETH) address
      * @param _voting the Lido Aragon Voting address
      * @param _totalCoverSharesBurnt Shares burnt counter init value (cover case)
      * @param _totalNonCoverSharesBurnt Shares burnt counter init value (non-cover case)
      * @param _maxBurnAmountPerRunBasisPoints Max burn amount per single run
      */
    constructor(
        address _treasury,
        address _lido,
        address _voting,
        uint256 _totalCoverSharesBurnt,
        uint256 _totalNonCoverSharesBurnt,
        uint256 _maxBurnAmountPerRunBasisPoints
    ) {
        require(_treasury != address(0), "TREASURY_ZERO_ADDRESS");
        require(_lido != address(0), "LIDO_ZERO_ADDRESS");
        require(_voting != address(0), "VOTING_ZERO_ADDRESS");
        require(_maxBurnAmountPerRunBasisPoints > 0, "ZERO_BURN_AMOUNT_PER_RUN");
        require(_maxBurnAmountPerRunBasisPoints <= MAX_BASIS_POINTS, "TOO_LARGE_BURN_AMOUNT_PER_RUN");

        TREASURY = _treasury;
        LIDO = _lido;
        VOTING = _voting;

        totalCoverSharesBurnt = _totalCoverSharesBurnt;
        totalNonCoverSharesBurnt = _totalNonCoverSharesBurnt;

        maxBurnAmountPerRunBasisPoints = _maxBurnAmountPerRunBasisPoints;
    }

    /**
      * Sets the maximum amount of shares allowed to burn per single run (quota).
      *
      * @dev only `voting` allowed to call this function.
      *
      * @param _maxBurnAmountPerRunBasisPoints a fraction expressed in basis points (taken from Lido.totalSharesAmount)
      *
      */
    function setBurnAmountPerRunQuota(uint256 _maxBurnAmountPerRunBasisPoints) external {
        require(_maxBurnAmountPerRunBasisPoints > 0, "ZERO_BURN_AMOUNT_PER_RUN");
        require(_maxBurnAmountPerRunBasisPoints <= MAX_BASIS_POINTS, "TOO_LARGE_BURN_AMOUNT_PER_RUN");
        require(msg.sender == VOTING, "MSG_SENDER_MUST_BE_VOTING");

        emit BurnAmountPerRunQuotaChanged(_maxBurnAmountPerRunBasisPoints);

        maxBurnAmountPerRunBasisPoints = _maxBurnAmountPerRunBasisPoints;
    }

    /**
      * @notice BE CAREFUL, the provided stETH will be burnt permanently.
      * @dev only `voting` allowed to call this function.
      *
      * Transfers `_stETH2Burn` stETH tokens from the message sender and irreversibly locks these
      * on the burner contract address. Internally converts `_stETH2Burn` amount into underlying
      * shares amount (`_stETH2BurnAsShares`) and marks the converted amount for burning
      * by increasing the `coverSharesBurnRequested` counter.
      *
      * @param _stETH2Burn stETH tokens to burn
      *
      */
    function requestBurnMyStETHForCover(uint256 _stETH2Burn) external {
        _requestBurnMyStETH(_stETH2Burn, true);
    }

    /**
      * @notice BE CAREFUL, the provided stETH will be burnt permanently.
      * @dev only `voting` allowed to call this function.
      *
      * Transfers `_stETH2Burn` stETH tokens from the message sender and irreversibly locks these
      * on the burner contract address. Internally converts `_stETH2Burn` amount into underlying
      * shares amount (`_stETH2BurnAsShares`) and marks the converted amount for burning
      * by increasing the `nonCoverSharesBurnRequested` counter.
      *
      * @param _stETH2Burn stETH tokens to burn
      *
      */
    function requestBurnMyStETH(uint256 _stETH2Burn) external {
        _requestBurnMyStETH(_stETH2Burn, false);
    }

    /**
      * Transfers the excess stETH amount (e.g. belonging to the burner contract address
      * but not marked for burning) to the Lido treasury address set upon the
      * contract construction.
      */
    function recoverExcessStETH() external {
        uint256 excessStETH = getExcessStETH();

        if (excessStETH > 0) {
            uint256 excessSharesAmount = ILido(LIDO).getSharesByPooledEth(excessStETH);

            emit ExcessStETHRecovered(msg.sender, excessStETH, excessSharesAmount);

            require(IERC20(LIDO).transfer(TREASURY, excessStETH));
        }
    }

    /**
      * Intentionally deny incoming ether
      */
    receive() external payable {
        revert("INCOMING_ETH_IS_FORBIDDEN");
    }

    /**
      * Transfers a given `_amount` of an ERC20-token (defined by the `_token` contract address)
      * currently belonging to the burner contract address to the Lido treasury address.
      *
      * @param _token an ERC20-compatible token
      * @param _amount token amount
      */
    function recoverERC20(address _token, uint256 _amount) external {
        require(_amount > 0, "ZERO_RECOVERY_AMOUNT");
        require(_token != LIDO, "STETH_RECOVER_WRONG_FUNC");

        emit ERC20Recovered(msg.sender, _token, _amount);

        IERC20(_token).safeTransfer(TREASURY, _amount);
    }

    /**
      * Transfers a given token_id of an ERC721-compatible NFT (defined by the token contract address)
      * currently belonging to the burner contract address to the Lido treasury address.
      *
      * @param _token an ERC721-compatible token
      * @param _tokenId minted token id
      */
    function recoverERC721(address _token, uint256 _tokenId) external {
        emit ERC721Recovered(msg.sender, _token, _tokenId);

        IERC721(_token).transferFrom(address(this), TREASURY, _tokenId);
    }

    /**
     * Enacts cover/non-cover burning requests and logs cover/non-cover shares amount just burnt.
     * Increments `totalCoverSharesBurnt` and `totalNonCoverSharesBurnt` counters.
     * Resets `coverSharesBurnRequested` and `nonCoverSharesBurnRequested` counters to zero.
     * Does nothing if there are no pending burning requests.
     */
    function processLidoOracleReport(uint256, uint256, uint256) external virtual override {
        uint256 memCoverSharesBurnRequested = coverSharesBurnRequested;
        uint256 memNonCoverSharesBurnRequested = nonCoverSharesBurnRequested;

        uint256 burnAmount = memCoverSharesBurnRequested + memNonCoverSharesBurnRequested;

        if (burnAmount == 0) {
            return;
        }

        address oracle = ILido(LIDO).getOracle();

        /**
          * Allow invocation only from `LidoOracle` or previously set composite beacon report receiver.
          * The second condition provides a way to use multiple callbacks packed into a single composite container.
          */
        require(
            msg.sender == oracle
            || (msg.sender == IOracle(oracle).getBeaconReportReceiver()),
            "APP_AUTH_FAILED"
        );

        uint256 maxSharesToBurnNow = (ILido(LIDO).getTotalShares() * maxBurnAmountPerRunBasisPoints) / MAX_BASIS_POINTS;

        if (memCoverSharesBurnRequested > 0) {
            uint256 sharesToBurnNowForCover = Math.min(maxSharesToBurnNow, memCoverSharesBurnRequested);

            totalCoverSharesBurnt += sharesToBurnNowForCover;
            uint256 stETHToBurnNowForCover = ILido(LIDO).getPooledEthByShares(sharesToBurnNowForCover);
            emit StETHBurnt(true /* isCover */, stETHToBurnNowForCover, sharesToBurnNowForCover);

            coverSharesBurnRequested -= sharesToBurnNowForCover;

            // early return if at least one of the conditions is TRUE:
            // - we have reached a capacity per single run already
            // - there are no pending non-cover requests
            if ((sharesToBurnNowForCover == maxSharesToBurnNow) || (memNonCoverSharesBurnRequested == 0)) {
                ILido(LIDO).burnShares(address(this), sharesToBurnNowForCover);
                return;
            }
        }

        // we're here only if memNonCoverSharesBurnRequested > 0
        uint256 sharesToBurnNowForNonCover = Math.min(
            maxSharesToBurnNow - memCoverSharesBurnRequested,
            memNonCoverSharesBurnRequested
        );

        totalNonCoverSharesBurnt += sharesToBurnNowForNonCover;
        uint256 stETHToBurnNowForNonCover = ILido(LIDO).getPooledEthByShares(sharesToBurnNowForNonCover);
        emit StETHBurnt(false /* isCover */, stETHToBurnNowForNonCover, sharesToBurnNowForNonCover);
        nonCoverSharesBurnRequested -= sharesToBurnNowForNonCover;

        ILido(LIDO).burnShares(address(this), memCoverSharesBurnRequested + sharesToBurnNowForNonCover);
    }

    /**
      * Returns the total cover shares ever burnt.
      */
    function getCoverSharesBurnt() external view virtual override returns (uint256) {
        return totalCoverSharesBurnt;
    }

    /**
      * Returns the total non-cover shares ever burnt.
      */
    function getNonCoverSharesBurnt() external view virtual override returns (uint256) {
        return totalNonCoverSharesBurnt;
    }

    /**
      * Returns the max amount of shares allowed to burn per single run
      */
    function getBurnAmountPerRunQuota() external view returns (uint256) {
        return maxBurnAmountPerRunBasisPoints;
    }

    /**
      * Returns the stETH amount belonging to the burner contract address but not marked for burning.
      */
    function getExcessStETH() public view returns (uint256)  {
        uint256 sharesBurnRequested = (coverSharesBurnRequested + nonCoverSharesBurnRequested);
        uint256 totalShares = ILido(LIDO).sharesOf(address(this));

        // sanity check, don't revert
        if (totalShares <= sharesBurnRequested) {
            return 0;
        }

        return ILido(LIDO).getPooledEthByShares(totalShares - sharesBurnRequested);
    }

    function supportsInterface(bytes4 _interfaceId) public view virtual override returns (bool) {
        return (
            _interfaceId == type(IBeaconReportReceiver).interfaceId
            || _interfaceId == type(ISelfOwnedStETHBurner).interfaceId
            || super.supportsInterface(_interfaceId)
        );
    }

    function _requestBurnMyStETH(uint256 _stETH2Burn, bool _isCover) private {
        require(_stETH2Burn > 0, "ZERO_BURN_AMOUNT");
        require(msg.sender == VOTING, "MSG_SENDER_MUST_BE_VOTING");
        require(IERC20(LIDO).transferFrom(msg.sender, address(this), _stETH2Burn));

        uint256 sharesAmount = ILido(LIDO).getSharesByPooledEth(_stETH2Burn);

        emit StETHBurnRequested(_isCover, msg.sender, _stETH2Burn, sharesAmount);

        if (_isCover) {
            coverSharesBurnRequested += sharesAmount;
        } else {
            nonCoverSharesBurnRequested += sharesAmount;
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `sender` to `recipient` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) external returns (bool);

    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)

pragma solidity ^0.8.0;

import "../../utils/introspection/IERC165.sol";

/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721 is IERC165 {
    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
     */
    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
     */
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    /**
     * @dev Returns the number of tokens in ``owner``'s account.
     */
    function balanceOf(address owner) external view returns (uint256 balance);

    /**
     * @dev Returns the owner of the `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function ownerOf(uint256 tokenId) external view returns (address owner);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Transfers `tokenId` token from `from` to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Gives permission to `to` to transfer `tokenId` token to another account.
     * The approval is cleared when the token is transferred.
     *
     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.
     *
     * Requirements:
     *
     * - The caller must own the token or be an approved operator.
     * - `tokenId` must exist.
     *
     * Emits an {Approval} event.
     */
    function approve(address to, uint256 tokenId) external;

    /**
     * @dev Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) external view returns (address operator);

    /**
     * @dev Approve or remove `operator` as an operator for the caller.
     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
     *
     * Requirements:
     *
     * - The `operator` cannot be the caller.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool _approved) external;

    /**
     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
     *
     * See {setApprovalForAll}
     */
    function isApprovedForAll(address owner, address operator) external view returns (bool);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes calldata data
    ) external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20.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));
        }
    }

    /**
     * @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 v4.4.1 (utils/introspection/ERC165.sol)

pragma solidity ^0.8.0;

import "./IERC165.sol";

/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
 * for the additional interface id that will be supported. For example:
 *
 * ```solidity
 * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
 *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
 * }
 * ```
 *
 * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
 */
abstract contract ERC165 is IERC165 {
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IERC165).interfaceId;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/math/Math.sol)

pragma solidity ^0.8.0;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    /**
     * @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 / b + (a % b == 0 ? 0 : 1);
    }
}

// SPDX-FileCopyrightText: 2021 Lido <[email protected]>

// SPDX-License-Identifier: GPL-3.0

pragma solidity 0.8.9;

/**
  * @title Interface defining a callback that the quorum will call on every quorum reached
  */
interface IBeaconReportReceiver {
    /**
      * @notice Callback to be called by the oracle contract upon the quorum is reached
      * @param _postTotalPooledEther total pooled ether on Lido right after the quorum value was reported
      * @param _preTotalPooledEther total pooled ether on Lido right before the quorum value was reported
      * @param _timeElapsed time elapsed in seconds between the last and the previous quorum
      */
    function processLidoOracleReport(uint256 _postTotalPooledEther,
                                     uint256 _preTotalPooledEther,
                                     uint256 _timeElapsed) external;
}

// SPDX-FileCopyrightText: 2022 Lido <[email protected]>

// SPDX-License-Identifier: GPL-3.0

pragma solidity 0.8.9;

/**
  * @title Interface defining a "client-side" of the `SelfOwnedStETHBurner` contract.
  */
interface ISelfOwnedStETHBurner {
    /**
      * Returns the total cover shares ever burnt.
      */
    function getCoverSharesBurnt() external view returns (uint256);

    /**
      * Returns the total non-cover shares ever burnt.
      */
    function getNonCoverSharesBurnt() external view returns (uint256);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Address.sol)

pragma solidity ^0.8.0;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        assembly {
            size := extcodesize(account)
        }
        return size > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

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

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

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

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

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

        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

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

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

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

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason 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 {
            // 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

                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

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

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"address","name":"_treasury","type":"address"},{"internalType":"address","name":"_lido","type":"address"},{"internalType":"address","name":"_voting","type":"address"},{"internalType":"uint256","name":"_totalCoverSharesBurnt","type":"uint256"},{"internalType":"uint256","name":"_totalNonCoverSharesBurnt","type":"uint256"},{"internalType":"uint256","name":"_maxBurnAmountPerRunBasisPoints","type":"uint256"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"maxBurnAmountPerRunBasisPoints","type":"uint256"}],"name":"BurnAmountPerRunQuotaChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"requestedBy","type":"address"},{"indexed":true,"internalType":"address","name":"token","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"ERC20Recovered","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"requestedBy","type":"address"},{"indexed":true,"internalType":"address","name":"token","type":"address"},{"indexed":false,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"ERC721Recovered","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"requestedBy","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"sharesAmount","type":"uint256"}],"name":"ExcessStETHRecovered","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bool","name":"isCover","type":"bool"},{"indexed":true,"internalType":"address","name":"requestedBy","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"sharesAmount","type":"uint256"}],"name":"StETHBurnRequested","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bool","name":"isCover","type":"bool"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"sharesAmount","type":"uint256"}],"name":"StETHBurnt","type":"event"},{"inputs":[],"name":"LIDO","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"TREASURY","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"VOTING","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getBurnAmountPerRunQuota","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getCoverSharesBurnt","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getExcessStETH","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getNonCoverSharesBurnt","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"}],"name":"processLidoOracleReport","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"recoverERC20","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"},{"internalType":"uint256","name":"_tokenId","type":"uint256"}],"name":"recoverERC721","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"recoverExcessStETH","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_stETH2Burn","type":"uint256"}],"name":"requestBurnMyStETH","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_stETH2Burn","type":"uint256"}],"name":"requestBurnMyStETHForCover","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_maxBurnAmountPerRunBasisPoints","type":"uint256"}],"name":"setBurnAmountPerRunQuota","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"_interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"stateMutability":"payable","type":"receive"}]

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

0000000000000000000000003e40d73eb977dc6a537af587d48316fee66e9c8c000000000000000000000000ae7ab96520de3a18e5e111b5eaab095312d7fe840000000000000000000000002e59a20f205bb85a89c53f1936454680651e618e0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001be1c69f1fd9c84300000000000000000000000000000000000000000000000000000000000000004

-----Decoded View---------------
Arg [0] : _treasury (address): 0x3e40D73EB977Dc6a537aF587D48316feE66E9C8c
Arg [1] : _lido (address): 0xae7ab96520DE3A18E5e111B5EaAb095312D7fE84
Arg [2] : _voting (address): 0x2e59A20f205bB85a89C53f1936454680651E618e
Arg [3] : _totalCoverSharesBurnt (uint256): 0
Arg [4] : _totalNonCoverSharesBurnt (uint256): 32145684728326685744
Arg [5] : _maxBurnAmountPerRunBasisPoints (uint256): 4

-----Encoded View---------------
6 Constructor Arguments found :
Arg [0] : 0000000000000000000000003e40d73eb977dc6a537af587d48316fee66e9c8c
Arg [1] : 000000000000000000000000ae7ab96520de3a18e5e111b5eaab095312d7fe84
Arg [2] : 0000000000000000000000002e59a20f205bb85a89c53f1936454680651e618e
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [4] : 000000000000000000000000000000000000000000000001be1c69f1fd9c8430
Arg [5] : 0000000000000000000000000000000000000000000000000000000000000004