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// SPDX-License-Identifier: LGPL-3.0-only
// Created By: Art Blocks Inc.

import "../interfaces/0.8.x/IGenArt721CoreV2_PBAB.sol";

import "@openzeppelin-4.5/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin-4.5/contracts/utils/math/SafeCast.sol";

pragma solidity 0.8.17;

/**
 * @title A minter contract that allows tokens to be minted with ETH.
 * Pricing is achieved using an automated Dutch-auction mechanism.
 * This is a fork of MinterDAExpV2, which is intended to be used directly
 * with IGenArt721CoreV2_PBAB contracts rather than with IGenArt721CoreContractV3
 * and as such does not conform to IFilteredMinterV0 nor assume presence
 * of a IMinterFilterV0 conforming minter filter.
 * @author Art Blocks Inc.
 * @notice Privileged Roles and Ownership:
 * This contract is designed to be managed, with limited powers.
 * Privileged roles and abilities are controlled by the core contract's allowlisted
 * (`isWhitelisted` conforming) addresses and a project's artist. Both of these
 * roles hold extensive power and can modify minter details.
 * Care must be taken to ensure that the core contract permissions and artist
 * addresses are secure behind a multi-sig or other access control mechanism.
 * ----------------------------------------------------------------------------
 * The following functions are restricted to the core contract's allowlisted
 * (`isWhitelisted` conforming) address(es):
 * - setAllowablePriceDecayHalfLifeRangeSeconds (note: this range is only
 *   enforced when creating new auctions)
 * - resetAuctionDetails (note: this will prevent minting until a new auction
 *   is created)
 * ----------------------------------------------------------------------------
 * The following functions are restricted to a project's artist:
 * - setAuctionDetails (note: this may only be called when there is no active
 *   auction)
 * ----------------------------------------------------------------------------
 * Additional admin and artist privileged roles may be described on other
 * contracts that this minter integrates with.
 *
 * @dev Note that while this minter makes use of `block.timestamp` and it is
 * technically possible that this value is manipulated by block producers, such
 * manipulation will not have material impact on the price values of this minter
 * given the business practices for how pricing is congfigured for this minter
 * and that variations on the order of less than a minute should not
 * meaningfully impact price given the minimum allowable price decay rate that
 * this minter intends to support.
 */
contract GenArt721MinterDAExp_PBAB is ReentrancyGuard {
    using SafeCast for uint256;

    /// Auction details updated for project `projectId`.
    event SetAuctionDetails(
        uint256 indexed projectId,
        uint256 _auctionTimestampStart,
        uint256 _priceDecayHalfLifeSeconds,
        uint256 _startPrice,
        uint256 _basePrice
    );

    /// Auction details cleared for project `projectId`.
    event ResetAuctionDetails(uint256 indexed projectId);

    /// Maximum and minimum allowed price decay half lifes updated.
    event AuctionHalfLifeRangeSecondsUpdated(
        uint256 _minimumPriceDecayHalfLifeSeconds,
        uint256 _maximumPriceDecayHalfLifeSeconds
    );

    /// Core contract address this minter interacts with
    address public immutable genArt721CoreAddress;

    /// This contract handles cores with interface IGenArt721CoreV2_PBAB
    IGenArt721CoreV2_PBAB private immutable genArtCoreContract;

    uint256 constant ONE_MILLION = 1_000_000;

    address payable public ownerAddress;
    uint256 public ownerPercentage;

    struct ProjectConfig {
        bool maxHasBeenInvoked;
        uint24 maxInvocations;
        // max uint64 ~= 1.8e19 sec ~= 570 billion years
        uint64 timestampStart;
        uint64 priceDecayHalfLifeSeconds;
        uint256 startPrice;
        uint256 basePrice;
    }

    mapping(uint256 => ProjectConfig) public projectConfig;

    /// Minimum price decay half life: price must decay with a half life of at
    /// least this amount (must cut in half at least every N seconds).
    uint256 public minimumPriceDecayHalfLifeSeconds = 300; // 5 minutes
    /// Maximum price decay half life: price may decay with a half life of no
    /// more than this amount (may cut in half at no more than every N seconds).
    uint256 public maximumPriceDecayHalfLifeSeconds = 3600; // 60 minutes

    // modifier to restrict access to only addresses specified by the
    // `onlyWhitelisted()` method on the associated core contract
    modifier onlyCoreAllowlisted() {
        require(
            genArtCoreContract.isWhitelisted(msg.sender),
            "Only Core allowlisted"
        );
        _;
    }

    // modifier to restrict access to only the artist for a given project
    modifier onlyArtist(uint256 _projectId) {
        require(
            (msg.sender ==
                genArtCoreContract.projectIdToArtistAddress(_projectId)),
            "Only Artist"
        );
        _;
    }

    // modifier to restrict access to calls only involving a valid projectId
    // (an existing project)
    modifier onlyValidProjectId(uint256 _projectId) {
        require(
            _projectId < genArtCoreContract.nextProjectId(),
            "Only existing projects"
        );
        _;
    }

    /**
     * @notice Initializes contract to be integrated with
     * Art Blocks core contract at address `_genArt721Address`.
     * @param _genArt721Address Art Blocks core contract address for
     * which this contract will be a minter.
     */
    constructor(address _genArt721Address) ReentrancyGuard() {
        genArt721CoreAddress = _genArt721Address;
        genArtCoreContract = IGenArt721CoreV2_PBAB(_genArt721Address);
    }

    /**
     * @notice Sets the minter owner (the platform provider) address to `_ownerAddress`.
     * @param _ownerAddress New owner address.
     */
    function setOwnerAddress(
        address payable _ownerAddress
    ) public onlyCoreAllowlisted {
        ownerAddress = _ownerAddress;
    }

    /**
     * @notice Sets the minter owner (the platform provider) revenue % to `_ownerPercentage` percent.
     * @param _ownerPercentage New owner percentage.
     */
    function setOwnerPercentage(
        uint256 _ownerPercentage
    ) public onlyCoreAllowlisted {
        ownerPercentage = _ownerPercentage;
    }

    /**
     * @notice Syncs local maximum invocations of project `_projectId` based on
     * the value currently defined in the core contract. Only used for gas
     * optimization of mints after maxInvocations has been reached.
     * @param _projectId Project ID to set the maximum invocations for.
     * @dev this enables gas reduction after maxInvocations have been reached -
     * core contracts shall still enforce a maxInvocation check during mint.
     * @dev function is intentionally not gated to any specific access control;
     * it only syncs a local state variable to the core contract's state.
     */
    function setProjectMaxInvocations(uint256 _projectId) external {
        uint256 maxInvocations;
        uint256 invocations;
        (, , invocations, maxInvocations, , , , , ) = genArtCoreContract
            .projectTokenInfo(_projectId);
        // update storage with results
        projectConfig[_projectId].maxInvocations = uint24(maxInvocations);
        if (invocations < maxInvocations) {
            projectConfig[_projectId].maxHasBeenInvoked = false;
        }
    }

    /**
     * @notice Warning: Disabling purchaseTo is not supported on this minter.
     * This method exists purely for interface-conformance purposes.
     */
    function togglePurchaseToDisabled(
        uint256 _projectId
    ) external view onlyArtist(_projectId) {
        revert("Action not supported");
    }

    /**
     * @notice projectId => has project reached its maximum number of
     * invocations? Note that this returns a local cache of the core contract's
     * state, and may be out of sync with the core contract. This is
     * intentional, as it only enables gas optimization of mints after a
     * project's maximum invocations has been reached. A false negative will
     * only result in a gas cost increase, since the core contract will still
     * enforce a maxInvocation check during minting. A false positive is not
     * possible because the V2 engine core contract only allows maximum invocations
     * to be reduced, not increased. Based on this rationale, we intentionally
     * do not do input validation in this method as to whether or not the input
     * `_projectId` is an existing project ID.
     *
     */
    function projectMaxHasBeenInvoked(
        uint256 _projectId
    ) external view returns (bool) {
        return projectConfig[_projectId].maxHasBeenInvoked;
    }

    /**
     * @notice projectId => project's maximum number of invocations.
     * Optionally synced with core contract value, for gas optimization.
     * Note that this returns a local cache of the core contract's
     * state, and may be out of sync with the core contract. This is
     * intentional, as it only enables gas optimization of mints after a
     * project's maximum invocations has been reached.
     * @dev A number greater than the core contract's project max invocations
     * will only result in a gas cost increase, since the core contract will
     * still enforce a maxInvocation check during minting. A number less than
     * the core contract's project max invocations is only possible when the
     * project's max invocations have not been synced on this minter, since the
     * V2 engine core contract only allows maximum invocations to be reduced, not
     * increased. When this happens, the minter will enable minting, allowing
     * the core contract to enforce the max invocations check. Based on this
     * rationale, we intentionally do not do input validation in this method as
     * to whether or not the input `_projectId` is an existing project ID.
     */
    function projectMaxInvocations(
        uint256 _projectId
    ) external view returns (uint256) {
        return uint256(projectConfig[_projectId].maxInvocations);
    }

    /**
     * @notice projectId => auction parameters
     */
    function projectAuctionParameters(
        uint256 _projectId
    )
        external
        view
        returns (
            uint256 timestampStart,
            uint256 priceDecayHalfLifeSeconds,
            uint256 startPrice,
            uint256 basePrice
        )
    {
        ProjectConfig storage _projectConfig = projectConfig[_projectId];
        return (
            _projectConfig.timestampStart,
            _projectConfig.priceDecayHalfLifeSeconds,
            _projectConfig.startPrice,
            _projectConfig.basePrice
        );
    }

    /**
     * @notice Sets the minimum and maximum values that are settable for
     * `_priceDecayHalfLifeSeconds` across all projects.
     * @param _minimumPriceDecayHalfLifeSeconds Minimum price decay half life
     * (in seconds).
     * @param _maximumPriceDecayHalfLifeSeconds Maximum price decay half life
     * (in seconds).
     */
    function setAllowablePriceDecayHalfLifeRangeSeconds(
        uint256 _minimumPriceDecayHalfLifeSeconds,
        uint256 _maximumPriceDecayHalfLifeSeconds
    ) external onlyCoreAllowlisted {
        require(
            _maximumPriceDecayHalfLifeSeconds >
                _minimumPriceDecayHalfLifeSeconds,
            "Maximum half life must be greater than minimum"
        );
        require(
            _minimumPriceDecayHalfLifeSeconds > 0,
            "Half life of zero not allowed"
        );
        minimumPriceDecayHalfLifeSeconds = _minimumPriceDecayHalfLifeSeconds;
        maximumPriceDecayHalfLifeSeconds = _maximumPriceDecayHalfLifeSeconds;
        emit AuctionHalfLifeRangeSecondsUpdated(
            _minimumPriceDecayHalfLifeSeconds,
            _maximumPriceDecayHalfLifeSeconds
        );
    }

    ////// Auction Functions
    /**
     * @notice Sets auction details for project `_projectId`.
     * @param _projectId Project ID to set auction details for.
     * @param _auctionTimestampStart Timestamp at which to start the auction.
     * @param _priceDecayHalfLifeSeconds The half life with which to decay the
     *  price (in seconds).
     * @param _startPrice Price at which to start the auction, in Wei.
     * @param _basePrice Resting price of the auction, in Wei.
     * @dev Note that it is intentionally supported here that the configured
     * price may be explicitly set to `0`.
     */
    function setAuctionDetails(
        uint256 _projectId,
        uint256 _auctionTimestampStart,
        uint256 _priceDecayHalfLifeSeconds,
        uint256 _startPrice,
        uint256 _basePrice
    ) external onlyValidProjectId(_projectId) onlyArtist(_projectId) {
        // CHECKS
        ProjectConfig storage _projectConfig = projectConfig[_projectId];
        require(
            _projectConfig.timestampStart == 0 ||
                block.timestamp < _projectConfig.timestampStart,
            "No modifications mid-auction"
        );
        require(
            block.timestamp < _auctionTimestampStart,
            "Only future auctions"
        );
        require(
            _startPrice >= _basePrice,
            "Auction start price must be greater than or equal to auction end price"
        );
        require(
            (_priceDecayHalfLifeSeconds >= minimumPriceDecayHalfLifeSeconds) &&
                (_priceDecayHalfLifeSeconds <=
                    maximumPriceDecayHalfLifeSeconds),
            "Price decay half life must fall between min and max allowable values"
        );
        // EFFECTS
        _projectConfig.timestampStart = _auctionTimestampStart.toUint64();
        _projectConfig.priceDecayHalfLifeSeconds = _priceDecayHalfLifeSeconds
            .toUint64();
        _projectConfig.startPrice = _startPrice;
        _projectConfig.basePrice = _basePrice;

        emit SetAuctionDetails(
            _projectId,
            _auctionTimestampStart,
            _priceDecayHalfLifeSeconds,
            _startPrice,
            _basePrice
        );
    }

    /**
     * @notice Resets auction details for project `_projectId`, zero-ing out all
     * relevant auction fields. Not intended to be used in normal auction
     * operation, but rather only in case of the need to halt an auction.
     * @param _projectId Project ID to set auction details for.
     */
    function resetAuctionDetails(
        uint256 _projectId
    ) external onlyCoreAllowlisted onlyValidProjectId(_projectId) {
        ProjectConfig storage _projectConfig = projectConfig[_projectId];
        // reset to initial values
        _projectConfig.timestampStart = 0;
        _projectConfig.priceDecayHalfLifeSeconds = 0;
        _projectConfig.startPrice = 0;
        _projectConfig.basePrice = 0;

        emit ResetAuctionDetails(_projectId);
    }

    /**
     * @notice Purchases a token from project `_projectId`.
     * @param _projectId Project ID to mint a token on.
     * @return tokenId Token ID of minted token
     */
    function purchase(
        uint256 _projectId
    ) external payable returns (uint256 tokenId) {
        tokenId = purchaseTo_do6(msg.sender, _projectId);
        return tokenId;
    }

    /**
     * @notice gas-optimized version of purchase(uint256).
     */
    function purchase_H4M(
        uint256 _projectId
    ) external payable returns (uint256 tokenId) {
        tokenId = purchaseTo_do6(msg.sender, _projectId);
        return tokenId;
    }

    /**
     * @notice Purchases a token from project `_projectId` and sets
     * the token's owner to `_to`.
     * @param _to Address to be the new token's owner.
     * @param _projectId Project ID to mint a token on.
     * @return tokenId Token ID of minted token
     */
    function purchaseTo(
        address _to,
        uint256 _projectId
    ) external payable returns (uint256 tokenId) {
        return purchaseTo_do6(_to, _projectId);
    }

    /**
     * @notice gas-optimized version of purchaseTo(address, uint256).
     */
    function purchaseTo_do6(
        address _to,
        uint256 _projectId
    ) public payable nonReentrant returns (uint256 tokenId) {
        // CHECKS
        ProjectConfig storage _projectConfig = projectConfig[_projectId];

        // Note that `maxHasBeenInvoked` is only checked here to reduce gas
        // consumption after a project has been fully minted.
        // `_projectConfig.maxHasBeenInvoked` is locally cached to reduce
        // gas consumption, but if not in sync with the core contract's value,
        // the core contract also enforces its own max invocation check during
        // minting.
        require(
            !_projectConfig.maxHasBeenInvoked,
            "Maximum number of invocations reached"
        );

        // _getPrice reverts if auction is unconfigured or has not started
        uint256 currentPriceInWei = _getPrice(_projectId);
        require(
            msg.value >= currentPriceInWei,
            "Must send minimum value to mint!"
        );

        // EFFECTS
        tokenId = genArtCoreContract.mint(_to, _projectId, msg.sender);

        // okay if this underflows because if statement will always eval false.
        // this is only for gas optimization (core enforces maxInvocations).
        unchecked {
            if (tokenId % ONE_MILLION == _projectConfig.maxInvocations - 1) {
                _projectConfig.maxHasBeenInvoked = true;
            }
        }

        // INTERACTIONS
        _splitFundsETHAuction(_projectId, currentPriceInWei);
        return tokenId;
    }

    /**
     * @dev splits ETH funds between sender (if refund), foundation,
     * artist, and artist's additional payee for a token purchased on
     * project `_projectId`.
     * @dev possible DoS during splits is acknowledged, and mitigated by
     * business practices, including end-to-end testing on mainnet, and
     * admin-accepted artist payment addresses.
     * @param _projectId Project ID for which funds shall be split.
     * @param _currentPriceInWei Current price of token, in Wei.
     */
    function _splitFundsETHAuction(
        uint256 _projectId,
        uint256 _currentPriceInWei
    ) internal {
        if (msg.value > 0) {
            bool success_;
            // send refund to sender
            uint256 refund = msg.value - _currentPriceInWei;
            if (refund > 0) {
                (success_, ) = msg.sender.call{value: refund}("");
                require(success_, "Refund failed");
            }
            // split remaining funds between render provider, platform provider,
            // artist, and artist's additional payee
            uint256 remainingFunds = _currentPriceInWei;

            // Render provider payment
            uint256 renderProviderAmount = (remainingFunds *
                genArtCoreContract.renderProviderPercentage()) / 100;
            if (renderProviderAmount > 0) {
                (success_, ) = genArtCoreContract.renderProviderAddress().call{
                    value: renderProviderAmount
                }("");
                require(success_, "Renderer payment failed");
                remainingFunds -= renderProviderAmount;
            }

            // Owner (platform provider) payment
            uint256 ownerFunds = (remainingFunds * ownerPercentage) / 100;
            if (ownerFunds > 0) {
                (success_, ) = ownerAddress.call{value: ownerFunds}("");
                require(success_, "Owner payment failed");
                remainingFunds -= ownerFunds;
            }

            // Artist additional payee payment
            uint256 additionalPayeePercentage = genArtCoreContract
                .projectIdToAdditionalPayeePercentage(_projectId);
            if (additionalPayeePercentage > 0) {
                uint256 additionalPayeeAmount = (remainingFunds *
                    additionalPayeePercentage) / 100;
                if (additionalPayeeAmount > 0) {
                    (success_, ) = genArtCoreContract
                        .projectIdToAdditionalPayee(_projectId)
                        .call{value: additionalPayeeAmount}("");
                    require(success_, "Additional payment failed");
                    remainingFunds -= additionalPayeeAmount;
                }
            }

            // Artist payment
            if (remainingFunds > 0) {
                (success_, ) = genArtCoreContract
                    .projectIdToArtistAddress(_projectId)
                    .call{value: remainingFunds}("");
                require(success_, "Artist payment failed");
            }
        }
    }

    /**
     * @notice Gets price of minting a token on project `_projectId` given
     * the project's AuctionParameters and current block timestamp.
     * Reverts if auction has not yet started or auction is unconfigured.
     * @param _projectId Project ID to get price of token for.
     * @return current price of token in Wei
     * @dev This method calculates price decay using a linear interpolation
     * of exponential decay based on the artist-provided half-life for price
     * decay, `_priceDecayHalfLifeSeconds`.
     */
    function _getPrice(uint256 _projectId) private view returns (uint256) {
        ProjectConfig storage _projectConfig = projectConfig[_projectId];
        // move parameters to memory if used more than once
        uint256 _timestampStart = uint256(_projectConfig.timestampStart);
        uint256 _priceDecayHalfLifeSeconds = uint256(
            _projectConfig.priceDecayHalfLifeSeconds
        );
        uint256 _basePrice = _projectConfig.basePrice;

        require(block.timestamp > _timestampStart, "Auction not yet started");
        require(_priceDecayHalfLifeSeconds > 0, "Only configured auctions");
        uint256 decayedPrice = _projectConfig.startPrice;
        uint256 elapsedTimeSeconds;
        // Return early if configured in "fixed price mode" for gas efficiency
        if (decayedPrice /* startPrice */ == _basePrice) {
            return _basePrice;
        }
        unchecked {
            // already checked that block.timestamp > _timestampStart above
            elapsedTimeSeconds = block.timestamp - _timestampStart;
        }
        // Divide by two (via bit-shifting) for the number of entirely completed
        // half-lives that have elapsed since auction start time.
        unchecked {
            // already required _priceDecayHalfLifeSeconds > 0
            decayedPrice >>= elapsedTimeSeconds / _priceDecayHalfLifeSeconds;
        }
        // Perform a linear interpolation between partial half-life points, to
        // approximate the current place on a perfect exponential decay curve.
        unchecked {
            // value of expression is provably always less than decayedPrice,
            // so no underflow is possible when the subtraction assignment
            // operator is used on decayedPrice.
            decayedPrice -=
                (decayedPrice *
                    (elapsedTimeSeconds % _priceDecayHalfLifeSeconds)) /
                _priceDecayHalfLifeSeconds /
                2;
        }
        if (decayedPrice < _basePrice) {
            // Price may not decay below stay `basePrice`.
            return _basePrice;
        }
        return decayedPrice;
    }

    /**
     * @notice Gets if price of token is configured, price of minting a
     * token on project `_projectId`, and currency symbol and address to be
     * used as payment. Supersedes any core contract price information.
     * @param _projectId Project ID to get price information for.
     * @return isConfigured true only if project's auction parameters have been
     * configured on this minter
     * @return tokenPriceInWei current price of token on this minter - invalid
     * if auction has not yet been configured
     * @return currencySymbol currency symbol for purchases of project on this
     * minter. This minter always returns "ETH"
     * @return currencyAddress currency address for purchases of project on
     * this minter. This minter always returns null address, reserved for ether
     */
    function getPriceInfo(
        uint256 _projectId
    )
        external
        view
        returns (
            bool isConfigured,
            uint256 tokenPriceInWei,
            string memory currencySymbol,
            address currencyAddress
        )
    {
        ProjectConfig storage _projectConfig = projectConfig[_projectId];

        isConfigured = (_projectConfig.startPrice > 0);
        if (block.timestamp <= _projectConfig.timestampStart) {
            // Provide a reasonable value for `tokenPriceInWei` when it would
            // otherwise revert, using the starting price before auction starts.
            tokenPriceInWei = _projectConfig.startPrice;
        } else if (_projectConfig.startPrice == 0) {
            // In the case of unconfigured auction, return price of zero when
            // it would otherwise revert
            tokenPriceInWei = 0;
        } else {
            tokenPriceInWei = _getPrice(_projectId);
        }
        currencySymbol = "ETH";
        currencyAddress = address(0);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (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() {
        // On the first call to nonReentrant, _notEntered will be true
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

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

        _;

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

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

pragma solidity ^0.8.0;

/**
 * @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow
 * checks.
 *
 * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can
 * easily result in undesired exploitation or bugs, since developers usually
 * assume that overflows raise errors. `SafeCast` restores this intuition by
 * reverting the transaction when such an operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 *
 * Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing
 * all math on `uint256` and `int256` and then downcasting.
 */
library SafeCast {
    /**
     * @dev Returns the downcasted uint224 from uint256, reverting on
     * overflow (when the input is greater than largest uint224).
     *
     * Counterpart to Solidity's `uint224` operator.
     *
     * Requirements:
     *
     * - input must fit into 224 bits
     */
    function toUint224(uint256 value) internal pure returns (uint224) {
        require(value <= type(uint224).max, "SafeCast: value doesn't fit in 224 bits");
        return uint224(value);
    }

    /**
     * @dev Returns the downcasted uint128 from uint256, reverting on
     * overflow (when the input is greater than largest uint128).
     *
     * Counterpart to Solidity's `uint128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     */
    function toUint128(uint256 value) internal pure returns (uint128) {
        require(value <= type(uint128).max, "SafeCast: value doesn't fit in 128 bits");
        return uint128(value);
    }

    /**
     * @dev Returns the downcasted uint96 from uint256, reverting on
     * overflow (when the input is greater than largest uint96).
     *
     * Counterpart to Solidity's `uint96` operator.
     *
     * Requirements:
     *
     * - input must fit into 96 bits
     */
    function toUint96(uint256 value) internal pure returns (uint96) {
        require(value <= type(uint96).max, "SafeCast: value doesn't fit in 96 bits");
        return uint96(value);
    }

    /**
     * @dev Returns the downcasted uint64 from uint256, reverting on
     * overflow (when the input is greater than largest uint64).
     *
     * Counterpart to Solidity's `uint64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     */
    function toUint64(uint256 value) internal pure returns (uint64) {
        require(value <= type(uint64).max, "SafeCast: value doesn't fit in 64 bits");
        return uint64(value);
    }

    /**
     * @dev Returns the downcasted uint32 from uint256, reverting on
     * overflow (when the input is greater than largest uint32).
     *
     * Counterpart to Solidity's `uint32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     */
    function toUint32(uint256 value) internal pure returns (uint32) {
        require(value <= type(uint32).max, "SafeCast: value doesn't fit in 32 bits");
        return uint32(value);
    }

    /**
     * @dev Returns the downcasted uint16 from uint256, reverting on
     * overflow (when the input is greater than largest uint16).
     *
     * Counterpart to Solidity's `uint16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     */
    function toUint16(uint256 value) internal pure returns (uint16) {
        require(value <= type(uint16).max, "SafeCast: value doesn't fit in 16 bits");
        return uint16(value);
    }

    /**
     * @dev Returns the downcasted uint8 from uint256, reverting on
     * overflow (when the input is greater than largest uint8).
     *
     * Counterpart to Solidity's `uint8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits.
     */
    function toUint8(uint256 value) internal pure returns (uint8) {
        require(value <= type(uint8).max, "SafeCast: value doesn't fit in 8 bits");
        return uint8(value);
    }

    /**
     * @dev Converts a signed int256 into an unsigned uint256.
     *
     * Requirements:
     *
     * - input must be greater than or equal to 0.
     */
    function toUint256(int256 value) internal pure returns (uint256) {
        require(value >= 0, "SafeCast: value must be positive");
        return uint256(value);
    }

    /**
     * @dev Returns the downcasted int128 from int256, reverting on
     * overflow (when the input is less than smallest int128 or
     * greater than largest int128).
     *
     * Counterpart to Solidity's `int128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     *
     * _Available since v3.1._
     */
    function toInt128(int256 value) internal pure returns (int128) {
        require(value >= type(int128).min && value <= type(int128).max, "SafeCast: value doesn't fit in 128 bits");
        return int128(value);
    }

    /**
     * @dev Returns the downcasted int64 from int256, reverting on
     * overflow (when the input is less than smallest int64 or
     * greater than largest int64).
     *
     * Counterpart to Solidity's `int64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     *
     * _Available since v3.1._
     */
    function toInt64(int256 value) internal pure returns (int64) {
        require(value >= type(int64).min && value <= type(int64).max, "SafeCast: value doesn't fit in 64 bits");
        return int64(value);
    }

    /**
     * @dev Returns the downcasted int32 from int256, reverting on
     * overflow (when the input is less than smallest int32 or
     * greater than largest int32).
     *
     * Counterpart to Solidity's `int32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     *
     * _Available since v3.1._
     */
    function toInt32(int256 value) internal pure returns (int32) {
        require(value >= type(int32).min && value <= type(int32).max, "SafeCast: value doesn't fit in 32 bits");
        return int32(value);
    }

    /**
     * @dev Returns the downcasted int16 from int256, reverting on
     * overflow (when the input is less than smallest int16 or
     * greater than largest int16).
     *
     * Counterpart to Solidity's `int16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     *
     * _Available since v3.1._
     */
    function toInt16(int256 value) internal pure returns (int16) {
        require(value >= type(int16).min && value <= type(int16).max, "SafeCast: value doesn't fit in 16 bits");
        return int16(value);
    }

    /**
     * @dev Returns the downcasted int8 from int256, reverting on
     * overflow (when the input is less than smallest int8 or
     * greater than largest int8).
     *
     * Counterpart to Solidity's `int8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits.
     *
     * _Available since v3.1._
     */
    function toInt8(int256 value) internal pure returns (int8) {
        require(value >= type(int8).min && value <= type(int8).max, "SafeCast: value doesn't fit in 8 bits");
        return int8(value);
    }

    /**
     * @dev Converts an unsigned uint256 into a signed int256.
     *
     * Requirements:
     *
     * - input must be less than or equal to maxInt256.
     */
    function toInt256(uint256 value) internal pure returns (int256) {
        // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive
        require(value <= uint256(type(int256).max), "SafeCast: value doesn't fit in an int256");
        return int256(value);
    }
}

// SPDX-License-Identifier: LGPL-3.0-only
// Created By: Art Blocks Inc.

pragma solidity ^0.8.0;

interface IGenArt721CoreV2_PBAB {
    /**
     * @notice Token ID `_tokenId` minted on project ID `_projectId` to `_to`.
     */
    event Mint(
        address indexed _to,
        uint256 indexed _tokenId,
        uint256 indexed _projectId
    );

    // getter function of public variable
    function admin() external view returns (address);

    // getter function of public variable
    function nextProjectId() external view returns (uint256);

    // getter function of public mapping
    function tokenIdToProjectId(
        uint256 tokenId
    ) external view returns (uint256 projectId);

    function isWhitelisted(address sender) external view returns (bool);

    function projectIdToCurrencySymbol(
        uint256 _projectId
    ) external view returns (string memory);

    function projectIdToCurrencyAddress(
        uint256 _projectId
    ) external view returns (address);

    function projectIdToArtistAddress(
        uint256 _projectId
    ) external view returns (address payable);

    function projectIdToPricePerTokenInWei(
        uint256 _projectId
    ) external view returns (uint256);

    function projectIdToAdditionalPayee(
        uint256 _projectId
    ) external view returns (address payable);

    function projectIdToAdditionalPayeePercentage(
        uint256 _projectId
    ) external view returns (uint256);

    function projectTokenInfo(
        uint256 _projectId
    )
        external
        view
        returns (
            address,
            uint256,
            uint256,
            uint256,
            bool,
            address,
            uint256,
            string memory,
            address
        );

    function renderProviderAddress() external view returns (address payable);

    function renderProviderPercentage() external view returns (uint256);

    function mint(
        address _to,
        uint256 _projectId,
        address _by
    ) external returns (uint256 tokenId);

    function getRoyaltyData(
        uint256 _tokenId
    )
        external
        view
        returns (
            address artistAddress,
            address additionalPayee,
            uint256 additionalPayeePercentage,
            uint256 royaltyFeeByID
        );
}

{
  "optimizer": {
    "enabled": true,
    "runs": 25
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"address","name":"_genArt721Address","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"_minimumPriceDecayHalfLifeSeconds","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"_maximumPriceDecayHalfLifeSeconds","type":"uint256"}],"name":"AuctionHalfLifeRangeSecondsUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"projectId","type":"uint256"}],"name":"ResetAuctionDetails","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"projectId","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"_auctionTimestampStart","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"_priceDecayHalfLifeSeconds","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"_startPrice","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"_basePrice","type":"uint256"}],"name":"SetAuctionDetails","type":"event"},{"inputs":[],"name":"genArt721CoreAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_projectId","type":"uint256"}],"name":"getPriceInfo","outputs":[{"internalType":"bool","name":"isConfigured","type":"bool"},{"internalType":"uint256","name":"tokenPriceInWei","type":"uint256"},{"internalType":"string","name":"currencySymbol","type":"string"},{"internalType":"address","name":"currencyAddress","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"maximumPriceDecayHalfLifeSeconds","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"minimumPriceDecayHalfLifeSeconds","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"ownerAddress","outputs":[{"internalType":"address payable","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"ownerPercentage","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_projectId","type":"uint256"}],"name":"projectAuctionParameters","outputs":[{"internalType":"uint256","name":"timestampStart","type":"uint256"},{"internalType":"uint256","name":"priceDecayHalfLifeSeconds","type":"uint256"},{"internalType":"uint256","name":"startPrice","type":"uint256"},{"internalType":"uint256","name":"basePrice","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"projectConfig","outputs":[{"internalType":"bool","name":"maxHasBeenInvoked","type":"bool"},{"internalType":"uint24","name":"maxInvocations","type":"uint24"},{"internalType":"uint64","name":"timestampStart","type":"uint64"},{"internalType":"uint64","name":"priceDecayHalfLifeSeconds","type":"uint64"},{"internalType":"uint256","name":"startPrice","type":"uint256"},{"internalType":"uint256","name":"basePrice","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_projectId","type":"uint256"}],"name":"projectMaxHasBeenInvoked","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_projectId","type":"uint256"}],"name":"projectMaxInvocations","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_projectId","type":"uint256"}],"name":"purchase","outputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"_to","type":"address"},{"internalType":"uint256","name":"_projectId","type":"uint256"}],"name":"purchaseTo","outputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"_to","type":"address"},{"internalType":"uint256","name":"_projectId","type":"uint256"}],"name":"purchaseTo_do6","outputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_projectId","type":"uint256"}],"name":"purchase_H4M","outputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_projectId","type":"uint256"}],"name":"resetAuctionDetails","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_minimumPriceDecayHalfLifeSeconds","type":"uint256"},{"internalType":"uint256","name":"_maximumPriceDecayHalfLifeSeconds","type":"uint256"}],"name":"setAllowablePriceDecayHalfLifeRangeSeconds","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_projectId","type":"uint256"},{"internalType":"uint256","name":"_auctionTimestampStart","type":"uint256"},{"internalType":"uint256","name":"_priceDecayHalfLifeSeconds","type":"uint256"},{"internalType":"uint256","name":"_startPrice","type":"uint256"},{"internalType":"uint256","name":"_basePrice","type":"uint256"}],"name":"setAuctionDetails","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address payable","name":"_ownerAddress","type":"address"}],"name":"setOwnerAddress","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_ownerPercentage","type":"uint256"}],"name":"setOwnerPercentage","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_projectId","type":"uint256"}],"name":"setProjectMaxInvocations","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_projectId","type":"uint256"}],"name":"togglePurchaseToDisabled","outputs":[],"stateMutability":"view","type":"function"}]

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00000000000000000000000032d4be5ee74376e08038d652d4dc26e62c67f436

-----Decoded View---------------
Arg [0] : _genArt721Address (address): 0x32D4BE5eE74376e08038d652d4dc26E62C67F436

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 00000000000000000000000032d4be5ee74376e08038d652d4dc26e62c67f436