Contract Source Code (Solidity)

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Outline

•    - function _msgSender()
•    - function _msgData()
•    - function _contextSuffixLength()
•    - function paused()
•    - function _requireNotPaused()
•    - function _requirePaused()
•    - function _pause()
•    - function _unpause()
•    - function _nonReentrantBefore()
•    - function _nonReentrantAfter()
•    - function _reentrancyGuardEntered()
•    - function owner()
•    - function _checkOwner()
•    - function renounceOwnership()
•    - function transferOwnership(address ne ...
•    - function _transferOwnership(address n ...
• interface IERC20
•    - function totalSupply()
•    - function balanceOf(address account)
•    - function transfer(address to, uint256 ...
•    - function allowance(address owner, add ...
•    - function approve(address spender, uin ...
•    - function transferFrom(address from, a ...
• interface IAuctionHouse
•    - function settleAuction()
•    - function settleCurrentAndCreateNewAuc ...
•    - function createBid(uint256 tokenId)
• interface IERC165
•    - function supportsInterface(bytes4 int ...
• interface IERC721 is IERC165
•    - function balanceOf(address owner)
•    - function ownerOf(uint256 tokenId)
•    - function safeTransferFrom(address fro ...
•    - function safeTransferFrom(address fro ...
•    - function transferFrom(address from, a ...
•    - function approve(address to, uint256 ...
•    - function setApprovalForAll(address op ...
•    - function getApproved(uint256 tokenId)
•    - function isApprovedForAll(address own ...
• interface IMintableERC721 is IERC721
•    - function mint(address to, uint256 qua ...
•    - function totalSupply()
• interface IWETH
•    - function deposit()
•    - function withdraw(uint256 wad)
•    - function transfer(address to, uint256 ...
•  contract AuctionHouse is IAuctionH ... *
•    - function configure(
•    - function settleCurrentAndCreateNewAuc ...
•    - function settleAuction()
•    - function createBid(uint256 tokenId)
•    - function pause()
•    - function unpause()
•    - function setTimeBuffer(uint256 _timeB ...
•    - function setReservePrice(uint256 _res ...
•    - function setMinBidIncrementPercentage ...
•    - function setDuration(uint256 _duratio ...
•    - function setTreasury(address _treasur ...
•    - function _createAuction()
•    - function _settleAuction()
•    - function _safeTransferETHWithFallback ...
•    - function _safeTransferETH(address to, ...

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/**
 *Submitted for verification at Etherscan.io on 2024-01-22
*/

// SPDX-License-Identifier: GPL-3.0

// LICENSE
// AuctionHouse.sol is a modified version of Zora's AuctionHouse.sol:
// https://github.com/ourzora/auction-house/blob/54a12ec1a6cf562e49f0a4917990474b11350a2d/contracts/AuctionHouse.sol
//
// AuctionHouse.sol source code Copyright Zora licensed under the GPL-3.0 license.
// With modifications by Nounders DAO.

pragma solidity ^0.8.6;

// OpenZeppelin Contracts (last updated v5.0.0) (utils/Pausable.sol)

// OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)

/**
 * @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;
    }
}

/**
 * @dev Contract module which allows children to implement an emergency stop
 * mechanism that can be triggered by an authorized account.
 *
 * This module is used through inheritance. It will make available the
 * modifiers `whenNotPaused` and `whenPaused`, which can be applied to
 * the functions of your contract. Note that they will not be pausable by
 * simply including this module, only once the modifiers are put in place.
 */
abstract contract Pausable is Context {
    bool private _paused;

    /**
     * @dev Emitted when the pause is triggered by `account`.
     */
    event Paused(address account);

    /**
     * @dev Emitted when the pause is lifted by `account`.
     */
    event Unpaused(address account);

    /**
     * @dev The operation failed because the contract is paused.
     */
    error EnforcedPause();

    /**
     * @dev The operation failed because the contract is not paused.
     */
    error ExpectedPause();

    /**
     * @dev Initializes the contract in unpaused state.
     */
    constructor() {
        _paused = false;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is not paused.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    modifier whenNotPaused() {
        _requireNotPaused();
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    modifier whenPaused() {
        _requirePaused();
        _;
    }

    /**
     * @dev Returns true if the contract is paused, and false otherwise.
     */
    function paused() public view virtual returns (bool) {
        return _paused;
    }

    /**
     * @dev Throws if the contract is paused.
     */
    function _requireNotPaused() internal view virtual {
        if (paused()) {
            revert EnforcedPause();
        }
    }

    /**
     * @dev Throws if the contract is not paused.
     */
    function _requirePaused() internal view virtual {
        if (!paused()) {
            revert ExpectedPause();
        }
    }

    /**
     * @dev Triggers stopped state.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    function _pause() internal virtual whenNotPaused {
        _paused = true;
        emit Paused(_msgSender());
    }

    /**
     * @dev Returns to normal state.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    function _unpause() internal virtual whenPaused {
        _paused = false;
        emit Unpaused(_msgSender());
    }
}

// OpenZeppelin Contracts (last updated v5.0.0) (utils/ReentrancyGuard.sol)

/**
 * @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;

    /**
     * @dev Unauthorized reentrant call.
     */
    error ReentrancyGuardReentrantCall();

    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
        if (_status == ENTERED) {
            revert ReentrancyGuardReentrantCall();
        }

        // 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;
    }

    /**
     * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
     * `nonReentrant` function in the call stack.
     */
    function _reentrancyGuardEntered() internal view returns (bool) {
        return _status == ENTERED;
    }
}

// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * The initial owner is set to the address provided by the deployer. This can
 * later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    /**
     * @dev The caller account is not authorized to perform an operation.
     */
    error OwnableUnauthorizedAccount(address account);

    /**
     * @dev The owner is not a valid owner account. (eg. `address(0)`)
     */
    error OwnableInvalidOwner(address owner);

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the address provided by the deployer as the initial owner.
     */
    constructor(address initialOwner) {
        if (initialOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(initialOwner);
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        if (owner() != _msgSender()) {
            revert OwnableUnauthorizedAccount(_msgSender());
        }
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        if (newOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/IERC20.sol)

/**
 * @dev Interface of the ERC-20 standard as defined in the ERC.
 */
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 value of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

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

    /**
     * @dev Moves a `value` amount of 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 value) 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 a `value` amount of tokens 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 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the
     * allowance mechanism. `value` 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 value) external returns (bool);
}

// @author Modified from Nouns (https://github.com/nounsDAO/nouns-monorepo/blob/master/packages/nouns-contracts/contracts/interfaces/INounsAuctionHouse.sol)
interface IAuctionHouse {
    struct Auction {
        // ERC721 token ID
        uint256 tokenId;
        // The current highest bid amount
        uint256 amount;
        // The time that the auction started
        uint256 startTime;
        // The time that the auction is scheduled to end
        uint256 endTime;
        // The address of the current highest bid
        address payable bidder;
        // Whether or not the auction has been settled
        bool settled;
    }

    event AuctionCreated(uint256 indexed tokenId, uint256 startTime, uint256 endTime);

    event AuctionBid(uint256 indexed tokenId, address sender, uint256 value, bool extended);

    event AuctionExtended(uint256 indexed tokenId, uint256 endTime);

    event AuctionSettled(uint256 indexed tokenId, address winner, uint256 amount);

    event AuctionTimeBufferUpdated(uint256 timeBuffer);

    event AuctionReservePriceUpdated(uint256 reservePrice);

    event AuctionMinBidIncrementPercentageUpdated(uint256 minBidIncrementPercentage);

    event AuctionDurationUpdated(uint256 duration);

    event AuctionTreasuryUpdated(address treasury);

    function settleAuction() external;

    function settleCurrentAndCreateNewAuction() external;

    function createBid(uint256 tokenId) external payable;
}

// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC721/IERC721.sol)

// OpenZeppelin Contracts (last updated v5.0.0) (utils/introspection/IERC165.sol)

/**
 * @dev Interface of the ERC-165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[ERC].
 *
 * 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[ERC 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);
}

/**
 * @dev Required interface of an ERC-721 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`.
     *
     * 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;

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC-721 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 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: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC-721
     * or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must
     * understand this adds an external call which potentially creates a reentrancy vulnerability.
     *
     * 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 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 address zero.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool approved) external;

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

    /**
     * @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);
}

interface IMintableERC721 is IERC721 {
    function mint(address to, uint256 quantity) external returns (uint256[] memory tokenIds);

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

// @author Modified from Nouns (https://github.com/nounsDAO/nouns-monorepo/blob/master/packages/nouns-contracts/contracts/interfaces/IWETH.sol)
interface IWETH {
    function deposit() external payable;

    function withdraw(uint256 wad) external;

    function transfer(address to, uint256 value) external returns (bool);
}

contract AuctionHouse is IAuctionHouse, Pausable, ReentrancyGuard, Ownable {
    // ERC721 token contract
    IMintableERC721 public tokens;

    // The address of the WETH contract
    address public weth;

    // The minimum amount of time left in an auction after a new bid is created
    uint256 public timeBuffer;

    // The minimum price accepted in an auction
    uint256 public reservePrice;

    // The minimum percentage difference between the last bid amount and the current bid
    uint8 public minBidIncrementPercentage;

    // The duration of a single auction
    uint256 public duration;

    // Recipient of auction proceeds
    address public treasury;

    // The active auction
    IAuctionHouse.Auction public auction;

    constructor(address _owner, address _treasury) Ownable(_owner) {
        _pause();

        treasury = _treasury;
    }

    function configure(
        IMintableERC721 _tokens,
        address _weth,
        uint256 _timeBuffer,
        uint256 _reservePrice,
        uint8 _minBidIncrementPercentage,
        uint256 _duration
    ) external onlyOwner {
        tokens = _tokens;
        weth = _weth;
        timeBuffer = _timeBuffer;
        reservePrice = _reservePrice;
        minBidIncrementPercentage = _minBidIncrementPercentage;
        duration = _duration;
    }

    /**
     * @notice Settle the current auction, mint a new token, and put it up for auction.
     */
    function settleCurrentAndCreateNewAuction() external override nonReentrant whenNotPaused {
        _settleAuction();
        _createAuction();
    }

    /**
     * @notice Settle the current auction.
     * @dev This function can only be called when the contract is paused.
     */
    function settleAuction() external override whenPaused nonReentrant {
        _settleAuction();
    }

    /**
     * @notice Create a bid for a token, with a given amount.
     * @dev This contract only accepts payment in ETH.
     */
    function createBid(uint256 tokenId) external payable override nonReentrant {
        IAuctionHouse.Auction memory _auction = auction;

        require(_auction.tokenId == tokenId, "Token not up for auction");
        require(block.timestamp < _auction.endTime, "Auction expired");
        require(msg.value >= reservePrice, "Must send at least reservePrice");
        require(
            msg.value >= _auction.amount + ((_auction.amount * minBidIncrementPercentage) / 100),
            "Must send more than last bid by minBidIncrementPercentage amount"
        );

        address payable lastBidder = _auction.bidder;

        // Refund the last bidder, if applicable
        if (lastBidder != address(0)) {
            _safeTransferETHWithFallback(lastBidder, _auction.amount);
        }

        auction.amount = msg.value;
        auction.bidder = payable(_msgSender());

        // Extend the auction if the bid was received within `timeBuffer` of the auction end time
        bool extended = _auction.endTime - block.timestamp < timeBuffer;
        if (extended) {
            auction.endTime = _auction.endTime = block.timestamp + timeBuffer;
        }

        emit AuctionBid(_auction.tokenId, _msgSender(), msg.value, extended);

        if (extended) {
            emit AuctionExtended(_auction.tokenId, _auction.endTime);
        }
    }

    /**
     * @notice Pause the auction house.
     * @dev This function can only be called by the owner when the
     * contract is unpaused. While no new auctions can be started when paused,
     * anyone can settle an ongoing auction.
     */
    function pause() external onlyOwner {
        _pause();
    }

    /**
     * @notice Unpause the auction house.
     * @dev This function can only be called by the owner when the
     * contract is paused. If required, this function will start a new auction.
     */
    function unpause() external onlyOwner {
        _unpause();

        if (auction.startTime == 0 || auction.settled) {
            _createAuction();
        }
    }

    /**
     * @notice Set the auction time buffer.
     * @dev Only callable by the owner.
     */
    function setTimeBuffer(uint256 _timeBuffer) external onlyOwner {
        timeBuffer = _timeBuffer;

        emit AuctionTimeBufferUpdated(_timeBuffer);
    }

    /**
     * @notice Set the auction reserve price.
     * @dev Only callable by the owner.
     */
    function setReservePrice(uint256 _reservePrice) external onlyOwner {
        reservePrice = _reservePrice;

        emit AuctionReservePriceUpdated(_reservePrice);
    }

    /**
     * @notice Set the auction minimum bid increment percentage.
     * @dev Only callable by the owner.
     */
    function setMinBidIncrementPercentage(uint8 _minBidIncrementPercentage) external onlyOwner {
        minBidIncrementPercentage = _minBidIncrementPercentage;

        emit AuctionMinBidIncrementPercentageUpdated(_minBidIncrementPercentage);
    }

    /**
     * @notice Set the auction duration.
     * @dev Only callable by the owner.
     */
    function setDuration(uint256 _duration) external onlyOwner {
        duration = _duration;

        emit AuctionDurationUpdated(duration);
    }

    /**
     * @notice Set the treasury address.
     * @dev Only callable by the owner.
     */
    function setTreasury(address _treasury) external onlyOwner {
        treasury = _treasury;

        emit AuctionTreasuryUpdated(treasury);
    }

    /**
     * @notice Create an auction.
     * @dev Store the auction details in the `auction` state variable and emit an AuctionCreated event.
     * If the mint reverts, the minter was updated without pausing this contract first. To remedy this,
     * catch the revert and pause this contract.
     */
    function _createAuction() internal {
        try tokens.mint(address(this), 1) returns (uint256[] memory tokenIds) {
            uint256 tokenId = tokenIds[0];

            uint256 startTime = block.timestamp;
            uint256 endTime = startTime + duration;

            auction = Auction({
                tokenId: tokenId,
                amount: 0,
                startTime: startTime,
                endTime: endTime,
                bidder: payable(0),
                settled: false
            });

            emit AuctionCreated(tokenId, startTime, endTime);
        } catch Error(string memory) {
            _pause();
        }
    }

    /**
     * @notice Settle an auction, finalizing the bid and paying out to the owner.
     * @dev If there are no bids, the token is sent to the treasury.
     */
    function _settleAuction() internal {
        IAuctionHouse.Auction memory _auction = auction;

        require(_auction.startTime != 0, "Auction hasn't begun");
        require(!_auction.settled, "Auction has already been settled");
        require(block.timestamp >= _auction.endTime, "Auction hasn't completed");

        auction.settled = true;

        if (_auction.bidder == address(0)) {
            tokens.transferFrom(address(this), treasury, _auction.tokenId);
        } else {
            tokens.transferFrom(address(this), _auction.bidder, _auction.tokenId);
        }

        if (_auction.amount > 0) {
            _safeTransferETHWithFallback(treasury, _auction.amount);
        }

        emit AuctionSettled(_auction.tokenId, _auction.bidder, _auction.amount);
    }

    /**
     * @notice Transfer ETH. If the ETH transfer fails, wrap the ETH and try send it as WETH.
     */
    function _safeTransferETHWithFallback(address to, uint256 amount) internal {
        if (!_safeTransferETH(to, amount)) {
            IWETH(weth).deposit{value: amount}();
            IERC20(weth).transfer(to, amount);
        }
    }

    /**
     * @notice Transfer ETH and return the success status.
     * @dev This function only forwards 30,000 gas to the callee.
     */
    function _safeTransferETH(address to, uint256 value) internal returns (bool) {
        (bool success, ) = to.call{value: value, gas: 30_000}(new bytes(0));
        return success;
    }
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"address","name":"_owner","type":"address"},{"internalType":"address","name":"_treasury","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"EnforcedPause","type":"error"},{"inputs":[],"name":"ExpectedPause","type":"error"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"OwnableInvalidOwner","type":"error"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"OwnableUnauthorizedAccount","type":"error"},{"inputs":[],"name":"ReentrancyGuardReentrantCall","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"},{"indexed":false,"internalType":"address","name":"sender","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"},{"indexed":false,"internalType":"bool","name":"extended","type":"bool"}],"name":"AuctionBid","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"startTime","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"endTime","type":"uint256"}],"name":"AuctionCreated","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"duration","type":"uint256"}],"name":"AuctionDurationUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"endTime","type":"uint256"}],"name":"AuctionExtended","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"minBidIncrementPercentage","type":"uint256"}],"name":"AuctionMinBidIncrementPercentageUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"reservePrice","type":"uint256"}],"name":"AuctionReservePriceUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"},{"indexed":false,"internalType":"address","name":"winner","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"AuctionSettled","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"timeBuffer","type":"uint256"}],"name":"AuctionTimeBufferUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"treasury","type":"address"}],"name":"AuctionTreasuryUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"account","type":"address"}],"name":"Paused","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"account","type":"address"}],"name":"Unpaused","type":"event"},{"inputs":[],"name":"auction","outputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"startTime","type":"uint256"},{"internalType":"uint256","name":"endTime","type":"uint256"},{"internalType":"address payable","name":"bidder","type":"address"},{"internalType":"bool","name":"settled","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"contract IMintableERC721","name":"_tokens","type":"address"},{"internalType":"address","name":"_weth","type":"address"},{"internalType":"uint256","name":"_timeBuffer","type":"uint256"},{"internalType":"uint256","name":"_reservePrice","type":"uint256"},{"internalType":"uint8","name":"_minBidIncrementPercentage","type":"uint8"},{"internalType":"uint256","name":"_duration","type":"uint256"}],"name":"configure","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"createBid","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"duration","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"minBidIncrementPercentage","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"paused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"reservePrice","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_duration","type":"uint256"}],"name":"setDuration","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint8","name":"_minBidIncrementPercentage","type":"uint8"}],"name":"setMinBidIncrementPercentage","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_reservePrice","type":"uint256"}],"name":"setReservePrice","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_timeBuffer","type":"uint256"}],"name":"setTimeBuffer","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_treasury","type":"address"}],"name":"setTreasury","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"settleAuction","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"settleCurrentAndCreateNewAuction","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"timeBuffer","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"tokens","outputs":[{"internalType":"contract IMintableERC721","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"treasury","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"unpause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"weth","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"}]

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000000000000000000000000618fd347e5f67dffa5dd7011b517c1e9c9e9fc3900000000000000000000000066aac71209f9654bb56f4092b84937a2dcdf27d3

-----Decoded View---------------
Arg [0] : _owner (address): 0x618Fd347E5f67dfFA5dd7011B517c1e9C9e9fc39
Arg [1] : _treasury (address): 0x66aac71209F9654Bb56F4092B84937a2DCDF27d3

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 000000000000000000000000618fd347e5f67dffa5dd7011b517c1e9c9e9fc39
Arg [1] : 00000000000000000000000066aac71209f9654bb56f4092b84937a2dcdf27d3

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