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

import "../../../interfaces/0.8.x/IGenArt721CoreContractV3_Base.sol";
import "../../../interfaces/0.8.x/IMinterFilterV0.sol";
import "../../../interfaces/0.8.x/IFilteredMinterMerkleV2.sol";
import "../../../interfaces/0.8.x/IDelegationRegistry.sol";
import "../MinterBase_v0_1_1.sol";

import "@openzeppelin-4.7/contracts/utils/cryptography/MerkleProof.sol";
import "@openzeppelin-4.7/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin-4.7/contracts/security/ReentrancyGuard.sol";

pragma solidity 0.8.17;

/**
 * @title Filtered Minter contract that allows tokens to be minted with ETH
 * for addresses in a Merkle allowlist.
 * This is designed to be used with GenArt721CoreContractV3 flagship or
 * engine contracts.
 * @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 project's artist, which
 * can be modified by the core contract's Admin ACL contract. Both of these
 * roles hold extensive power and can modify minter details.
 * Care must be taken to ensure that the admin ACL contract and artist
 * addresses are secure behind a multi-sig or other access control mechanism.
 * ----------------------------------------------------------------------------
 * The following functions are restricted to a project's artist:
 * - updateMerkleRoot
 * - updatePricePerTokenInWei
 * - setProjectInvocationsPerAddress
 * - setProjectMaxInvocations
 * - manuallyLimitProjectMaxInvocations
 * ----------------------------------------------------------------------------
 * Additional admin and artist privileged roles may be described on other
 * contracts that this minter integrates with.
 * ----------------------------------------------------------------------------
 * This contract allows vaults to configure token-level or wallet-level
 * delegation of minting privileges. This allows a vault on an allowlist to
 * delegate minting privileges to a wallet that is not on the allowlist,
 * enabling the vault to remain air-gapped while still allowing minting. The
 * delegation registry contract is responsible for managing these delegations,
 * and is available at the address returned by the public immutable
 * `delegationRegistryAddress`. At the time of writing, the delegation
 * registry enables easy delegation configuring at https://delegate.cash/.
 * Art Blocks does not guarentee the security of the delegation registry, and
 * users should take care to ensure that the delegation registry is secure.
 * Token-level delegations are configured by the vault owner, and contract-
 * level delegations must be configured for the core token contract as returned
 * by the public immutable variable `genArt721CoreAddress`.
 */
contract MinterMerkleV5 is
    ReentrancyGuard,
    MinterBase,
    IFilteredMinterMerkleV2
{
    using MerkleProof for bytes32[];

    /// Delegation registry address
    address public immutable delegationRegistryAddress;

    /// Delegation registry address
    IDelegationRegistry private immutable delegationRegistryContract;

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

    /// The core contract integrates with V3 contracts
    IGenArt721CoreContractV3_Base private immutable genArtCoreContract_Base;

    /// Minter filter address this minter interacts with
    address public immutable minterFilterAddress;

    /// Minter filter this minter may interact with.
    IMinterFilterV0 private immutable minterFilter;

    /// minterType for this minter
    string public constant minterType = "MinterMerkleV5";

    /// project minter configuration keys used by this minter
    bytes32 private constant CONFIG_MERKLE_ROOT = "merkleRoot";
    bytes32 private constant CONFIG_USE_MAX_INVOCATIONS_PER_ADDRESS_OVERRIDE =
        "useMaxMintsPerAddrOverride"; // shortened to fit in 32 bytes
    bytes32 private constant CONFIG_MAX_INVOCATIONS_OVERRIDE =
        "maxMintsPerAddrOverride"; // shortened to match format of previous key

    uint256 constant ONE_MILLION = 1_000_000;

    uint256 public constant DEFAULT_MAX_INVOCATIONS_PER_ADDRESS = 1;

    struct ProjectConfig {
        bool maxHasBeenInvoked;
        bool priceIsConfigured;
        // initial value is false, so by default, projects limit allowlisted
        // addresses to a mint qty of `DEFAULT_MAX_INVOCATIONS_PER_ADDRESS`
        bool useMaxInvocationsPerAddressOverride;
        // a value of 0 means no limit
        // (only used if `useMaxInvocationsPerAddressOverride` is true)
        uint24 maxInvocationsPerAddressOverride;
        uint24 maxInvocations;
        uint256 pricePerTokenInWei;
    }

    mapping(uint256 => ProjectConfig) public projectConfig;

    /// projectId => merkle root
    mapping(uint256 => bytes32) public projectMerkleRoot;

    /// projectId => purchaser address => qty of mints purchased for project
    mapping(uint256 => mapping(address => uint256))
        public projectUserMintInvocations;

    modifier onlyArtist(uint256 _projectId) {
        require(
            msg.sender ==
                genArtCoreContract_Base.projectIdToArtistAddress(_projectId),
            "Only Artist"
        );
        _;
    }

    /**
     * @notice Initializes contract to be a Filtered Minter for
     * `_minterFilter`, integrated with Art Blocks core contract
     * at address `_genArt721Address`. Also configures the delegation
     * registry address to be address `_delegationRegistryAddress`.
     * @param _genArt721Address Art Blocks core contract address for
     * which this contract will be a minter.
     * @param _minterFilter Minter filter for which this will be a
     * filtered minter.
     * @param _delegationRegistryAddress Delegation registry contract address.
     */
    constructor(
        address _genArt721Address,
        address _minterFilter,
        address _delegationRegistryAddress
    ) ReentrancyGuard() MinterBase(_genArt721Address) {
        genArt721CoreAddress = _genArt721Address;
        // always populate immutable engine contracts, but only use appropriate
        // interface based on isEngine in the rest of the contract
        genArtCoreContract_Base = IGenArt721CoreContractV3_Base(
            _genArt721Address
        );
        delegationRegistryAddress = _delegationRegistryAddress;
        emit DelegationRegistryUpdated(_delegationRegistryAddress);
        delegationRegistryContract = IDelegationRegistry(
            _delegationRegistryAddress
        );
        minterFilterAddress = _minterFilter;
        minterFilter = IMinterFilterV0(_minterFilter);
        require(
            minterFilter.genArt721CoreAddress() == _genArt721Address,
            "Illegal contract pairing"
        );
        // broadcast default max invocations per address for this minter
        emit DefaultMaxInvocationsPerAddress(
            DEFAULT_MAX_INVOCATIONS_PER_ADDRESS
        );
    }

    /**
     * @notice Update the Merkle root for project `_projectId`.
     * @param _projectId Project ID to be updated.
     * @param _root root of Merkle tree defining addresses allowed to mint
     * on project `_projectId`.
     */
    function updateMerkleRoot(
        uint256 _projectId,
        bytes32 _root
    ) external onlyArtist(_projectId) {
        require(_root != bytes32(0), "Root must be provided");
        projectMerkleRoot[_projectId] = _root;
        emit ConfigValueSet(_projectId, CONFIG_MERKLE_ROOT, _root);
    }

    /**
     * @notice Returns hashed address (to be used as merkle tree leaf).
     * Included as a public function to enable users to calculate their hashed
     * address in Solidity when generating proofs off-chain.
     * @param _address address to be hashed
     * @return bytes32 hashed address, via keccak256 (using encodePacked)
     */
    function hashAddress(address _address) public pure returns (bytes32) {
        return keccak256(abi.encodePacked(_address));
    }

    /**
     * @notice Verify if address is allowed to mint on project `_projectId`.
     * @param _projectId Project ID to be checked.
     * @param _proof Merkle proof for address.
     * @param _address Address to check.
     * @return inAllowlist true only if address is allowed to mint and valid
     * Merkle proof was provided
     */
    function verifyAddress(
        uint256 _projectId,
        bytes32[] calldata _proof,
        address _address
    ) public view returns (bool) {
        return
            _proof.verifyCalldata(
                projectMerkleRoot[_projectId],
                hashAddress(_address)
            );
    }

    /**
     * @notice Sets maximum allowed invocations per allowlisted address for
     * project `_project` to `limit`. If `limit` is set to 0, allowlisted
     * addresses will be able to mint as many times as desired, until the
     * project reaches its maximum invocations.
     * Default is a value of 1 if never configured by artist.
     * @param _projectId Project ID to toggle the mint limit.
     * @param _maxInvocationsPerAddress Maximum allowed invocations per
     * allowlisted address.
     * @dev default value stated above must be updated if the value of
     * CONFIG_USE_MAX_INVOCATIONS_PER_ADDRESS_OVERRIDE is changed.
     */
    function setProjectInvocationsPerAddress(
        uint256 _projectId,
        uint24 _maxInvocationsPerAddress
    ) external onlyArtist(_projectId) {
        ProjectConfig storage _projectConfig = projectConfig[_projectId];
        // use override value instead of the contract's default
        // @dev this never changes from true to false; default value is only
        // used if artist has never configured project invocations per address
        _projectConfig.useMaxInvocationsPerAddressOverride = true;
        // update the override value
        _projectConfig
            .maxInvocationsPerAddressOverride = _maxInvocationsPerAddress;
        // generic events
        emit ConfigValueSet(
            _projectId,
            CONFIG_USE_MAX_INVOCATIONS_PER_ADDRESS_OVERRIDE,
            true
        );
        emit ConfigValueSet(
            _projectId,
            CONFIG_MAX_INVOCATIONS_OVERRIDE,
            uint256(_maxInvocationsPerAddress)
        );
    }

    /**
     * @notice Syncs local maximum invocations of project `_projectId` based on
     * the value currently defined in the core contract.
     * @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.
     */
    function setProjectMaxInvocations(
        uint256 _projectId
    ) external onlyArtist(_projectId) {
        uint256 maxInvocations;
        uint256 invocations;
        (invocations, maxInvocations, , , , ) = genArtCoreContract_Base
            .projectStateData(_projectId);
        // update storage with results
        projectConfig[_projectId].maxInvocations = uint24(maxInvocations);

        // We need to ensure maxHasBeenInvoked is correctly set after manually syncing the
        // local maxInvocations value with the core contract's maxInvocations value.
        // This synced value of maxInvocations from the core contract will always be greater
        // than or equal to the previous value of maxInvocations stored locally.
        projectConfig[_projectId].maxHasBeenInvoked =
            invocations == maxInvocations;

        emit ProjectMaxInvocationsLimitUpdated(_projectId, maxInvocations);
    }

    /**
     * @notice Manually sets the local maximum invocations of project `_projectId`
     * with the provided `_maxInvocations`, checking that `_maxInvocations` is less
     * than or equal to the value of project `_project_id`'s maximum invocations that is
     * set on the core contract.
     * @dev Note that a `_maxInvocations` of 0 can only be set if the current `invocations`
     * value is also 0 and this would also set `maxHasBeenInvoked` to true, correctly short-circuiting
     * this minter's purchase function, avoiding extra gas costs from the core contract's maxInvocations check.
     * @param _projectId Project ID to set the maximum invocations for.
     * @param _maxInvocations Maximum invocations to set for the project.
     */
    function manuallyLimitProjectMaxInvocations(
        uint256 _projectId,
        uint256 _maxInvocations
    ) external onlyArtist(_projectId) {
        // CHECKS
        // ensure that the manually set maxInvocations is not greater than what is set on the core contract
        uint256 maxInvocations;
        uint256 invocations;
        (invocations, maxInvocations, , , , ) = genArtCoreContract_Base
            .projectStateData(_projectId);
        require(
            _maxInvocations <= maxInvocations,
            "Cannot increase project max invocations above core contract set project max invocations"
        );
        require(
            _maxInvocations >= invocations,
            "Cannot set project max invocations to less than current invocations"
        );

        // EFFECTS
        // update storage with results
        projectConfig[_projectId].maxInvocations = uint24(_maxInvocations);
        // We need to ensure maxHasBeenInvoked is correctly set after manually setting the
        // local maxInvocations value.
        projectConfig[_projectId].maxHasBeenInvoked =
            invocations == _maxInvocations;

        emit ProjectMaxInvocationsLimitUpdated(_projectId, _maxInvocations);
    }

    /**
     * @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 V3 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
     * V3 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 Updates this minter's price per token of project `_projectId`
     * to be '_pricePerTokenInWei`, in Wei.
     * This price supersedes any legacy core contract price per token value.
     * @dev Note that it is intentionally supported here that the configured
     * price may be explicitly set to `0`.
     */
    function updatePricePerTokenInWei(
        uint256 _projectId,
        uint256 _pricePerTokenInWei
    ) external onlyArtist(_projectId) {
        projectConfig[_projectId].pricePerTokenInWei = _pricePerTokenInWei;
        projectConfig[_projectId].priceIsConfigured = true;
        emit PricePerTokenInWeiUpdated(_projectId, _pricePerTokenInWei);
    }

    /**
     * @notice Inactive function - requires Merkle proof to purchase.
     */
    function purchase(uint256) external payable returns (uint256) {
        revert("Must provide Merkle proof");
    }

    /**
     * @notice Inactive function - requires Merkle proof to purchase.
     */
    function purchaseTo(address, uint256) public payable returns (uint256) {
        revert("Must provide Merkle proof");
    }

    /**
     * @notice Purchases a token from project `_projectId`.
     * @param _projectId Project ID to mint a token on.
     * @param _proof Merkle proof.
     * @return tokenId Token ID of minted token
     */
    function purchase(
        uint256 _projectId,
        bytes32[] calldata _proof
    ) external payable returns (uint256 tokenId) {
        tokenId = purchaseTo_kem(msg.sender, _projectId, _proof, address(0));
        return tokenId;
    }

    /**
     * @notice gas-optimized version of purchase(uint256,bytes32[]).
     */
    function purchase_gD5(
        uint256 _projectId,
        bytes32[] calldata _proof
    ) external payable returns (uint256 tokenId) {
        tokenId = purchaseTo_kem(msg.sender, _projectId, _proof, address(0));
        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.
     * @param _proof Merkle proof.
     * @return tokenId Token ID of minted token
     */
    function purchaseTo(
        address _to,
        uint256 _projectId,
        bytes32[] calldata _proof
    ) external payable returns (uint256 tokenId) {
        return purchaseTo_kem(_to, _projectId, _proof, address(0));
    }

    /**
     * @notice Purchases a token from project `_projectId` and sets
     *         the token's owner to `_to`, as a delegate, (the `msg.sender`)
     *         on behalf of an explicitly defined vault.
     * @param _to Address to be the new token's owner.
     * @param _projectId Project ID to mint a token on.
     * @param _proof Merkle proof.
     * @param _vault Vault being purchased on behalf of.
     * @return tokenId Token ID of minted token
     */
    function purchaseTo(
        address _to,
        uint256 _projectId,
        bytes32[] calldata _proof,
        address _vault
    ) external payable returns (uint256 tokenId) {
        return purchaseTo_kem(_to, _projectId, _proof, _vault);
    }

    /**
     * @notice gas-optimized version of
     * purchaseTo(address,uint256,bytes32[],address).
     * @param _to Address to be the new token's owner.
     * @param _projectId Project ID to mint a token on.
     * @param _proof Merkle proof. Must be a valid proof of either `msg.sender`
     * if `_vault` is `address(0)`, or `_vault` if `_vault` is not `address(0)`.
     * @param _vault Vault being purchased on behalf of. Acceptable to be
     * address(0) if no vault.
     */
    function purchaseTo_kem(
        address _to,
        uint256 _projectId,
        bytes32[] calldata _proof,
        address _vault // acceptable to be `address(0)` if no vault
    ) 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"
        );

        // load price of token into memory
        uint256 pricePerTokenInWei = _projectConfig.pricePerTokenInWei;

        require(
            msg.value >= pricePerTokenInWei,
            "Must send minimum value to mint!"
        );

        // require artist to have configured price of token on this minter
        require(_projectConfig.priceIsConfigured, "Price not configured");

        // no contract filter since Merkle tree controls allowed addresses

        // NOTE: delegate-vault handling **begins here**.

        // handle that the vault may be either the `msg.sender` in the case
        // that there is not a true vault, or may be `_vault` if one is
        // provided explicitly (and it is valid).
        address vault = msg.sender;
        if (_vault != address(0)) {
            // If a vault is provided, it must be valid, otherwise throw rather
            // than optimistically-minting with original `msg.sender`.
            // Note, we do not check `checkDelegateForAll` as well, as it is known
            // to be implicitly checked by calling `checkDelegateForContract`.
            bool isValidDelegee = delegationRegistryContract
                .checkDelegateForContract(
                    msg.sender, // delegate
                    _vault, // vault
                    genArt721CoreAddress // contract
                );
            require(isValidDelegee, "Invalid delegate-vault pairing");
            vault = _vault;
        }

        // require valid Merkle proof
        require(
            verifyAddress(_projectId, _proof, vault),
            "Invalid Merkle proof"
        );

        // limit mints per address by project
        uint256 _maxProjectInvocationsPerAddress = _projectConfig
            .useMaxInvocationsPerAddressOverride
            ? _projectConfig.maxInvocationsPerAddressOverride
            : DEFAULT_MAX_INVOCATIONS_PER_ADDRESS;

        // note that mint limits index off of the `vault` (when applicable)
        require(
            projectUserMintInvocations[_projectId][vault] <
                _maxProjectInvocationsPerAddress ||
                _maxProjectInvocationsPerAddress == 0,
            "Maximum number of invocations per address reached"
        );

        // EFFECTS
        // increment user's invocations for this project
        unchecked {
            // this will never overflow since user's invocations on a project
            // are limited by the project's max invocations
            projectUserMintInvocations[_projectId][vault]++;
        }

        // mint token
        tokenId = minterFilter.mint(_to, _projectId, vault);

        // NOTE: delegate-vault handling **ends here**.

        // 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
        splitFundsETH(_projectId, pricePerTokenInWei, genArt721CoreAddress);

        return tokenId;
    }

    /**
     * @notice projectId => maximum invocations per allowlisted address. If a
     * a value of 0 is returned, there is no limit on the number of mints per
     * allowlisted address.
     * Default behavior is limit 1 mint per address.
     * This value can be changed at any time by the artist.
     * @dev default value stated above must be updated if the value of
     * CONFIG_USE_MAX_INVOCATIONS_PER_ADDRESS_OVERRIDE is changed.
     */
    function projectMaxInvocationsPerAddress(
        uint256 _projectId
    ) public view returns (uint256) {
        ProjectConfig storage _projectConfig = projectConfig[_projectId];
        if (_projectConfig.useMaxInvocationsPerAddressOverride) {
            return uint256(_projectConfig.maxInvocationsPerAddressOverride);
        } else {
            return DEFAULT_MAX_INVOCATIONS_PER_ADDRESS;
        }
    }

    /**
     * @notice Returns remaining invocations for a given address.
     * If `projectLimitsMintInvocationsPerAddress` is false, individual
     * addresses are only limited by the project's maximum invocations, and a
     * dummy value of zero is returned for `mintInvocationsRemaining`.
     * If `projectLimitsMintInvocationsPerAddress` is true, the quantity of
     * remaining mint invocations for address `_address` is returned as
     * `mintInvocationsRemaining`.
     * Note that mint invocations per address can be changed at any time by the
     * artist of a project.
     * Also note that all mint invocations are limited by a project's maximum
     * invocations as defined on the core contract. This function may return
     * a value greater than the project's remaining invocations.
     */
    function projectRemainingInvocationsForAddress(
        uint256 _projectId,
        address _address
    )
        external
        view
        returns (
            bool projectLimitsMintInvocationsPerAddress,
            uint256 mintInvocationsRemaining
        )
    {
        uint256 maxInvocationsPerAddress = projectMaxInvocationsPerAddress(
            _projectId
        );
        if (maxInvocationsPerAddress == 0) {
            // project does not limit mint invocations per address, so leave
            // `projectLimitsMintInvocationsPerAddress` at solidity initial
            // value of false. Also leave `mintInvocationsRemaining` at
            // solidity initial value of zero, as indicated in this function's
            // documentation.
        } else {
            projectLimitsMintInvocationsPerAddress = true;
            uint256 userMintInvocations = projectUserMintInvocations[
                _projectId
            ][_address];
            // if user has not reached max invocations per address, return
            // remaining invocations
            if (maxInvocationsPerAddress > userMintInvocations) {
                unchecked {
                    // will never underflow due to the check above
                    mintInvocationsRemaining =
                        maxInvocationsPerAddress -
                        userMintInvocations;
                }
            }
            // else user has reached their maximum invocations, so leave
            // `mintInvocationsRemaining` at solidity initial value of zero
        }
    }

    /**
     * @notice Process proof for an address. Returns Merkle root. Included to
     * enable users to easily verify a proof's validity.
     * @param _proof Merkle proof for address.
     * @param _address Address to process.
     * @return merkleRoot Merkle root for `_address` and `_proof`
     */
    function processProofForAddress(
        bytes32[] calldata _proof,
        address _address
    ) external pure returns (bytes32) {
        return _proof.processProofCalldata(hashAddress(_address));
    }

    /**
     * @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 token price has been configured on
     * this minter
     * @return tokenPriceInWei current price of token on this minter - invalid
     * if price 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.priceIsConfigured;
        tokenPriceInWei = _projectConfig.pricePerTokenInWei;
        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 (last updated v4.6.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

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

    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

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

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/cryptography/MerkleProof.sol)

pragma solidity ^0.8.0;

/**
 * @dev These functions deal with verification of Merkle Tree proofs.
 *
 * The proofs can be generated using the JavaScript library
 * https://github.com/miguelmota/merkletreejs[merkletreejs].
 * Note: the hashing algorithm should be keccak256 and pair sorting should be enabled.
 *
 * See `test/utils/cryptography/MerkleProof.test.js` for some examples.
 *
 * WARNING: You should avoid using leaf values that are 64 bytes long prior to
 * hashing, or use a hash function other than keccak256 for hashing leaves.
 * This is because the concatenation of a sorted pair of internal nodes in
 * the merkle tree could be reinterpreted as a leaf value.
 */
library MerkleProof {
    /**
     * @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
     * defined by `root`. For this, a `proof` must be provided, containing
     * sibling hashes on the branch from the leaf to the root of the tree. Each
     * pair of leaves and each pair of pre-images are assumed to be sorted.
     */
    function verify(
        bytes32[] memory proof,
        bytes32 root,
        bytes32 leaf
    ) internal pure returns (bool) {
        return processProof(proof, leaf) == root;
    }

    /**
     * @dev Calldata version of {verify}
     *
     * _Available since v4.7._
     */
    function verifyCalldata(
        bytes32[] calldata proof,
        bytes32 root,
        bytes32 leaf
    ) internal pure returns (bool) {
        return processProofCalldata(proof, leaf) == root;
    }

    /**
     * @dev Returns the rebuilt hash obtained by traversing a Merkle tree up
     * from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt
     * hash matches the root of the tree. When processing the proof, the pairs
     * of leafs & pre-images are assumed to be sorted.
     *
     * _Available since v4.4._
     */
    function processProof(bytes32[] memory proof, bytes32 leaf) internal pure returns (bytes32) {
        bytes32 computedHash = leaf;
        for (uint256 i = 0; i < proof.length; i++) {
            computedHash = _hashPair(computedHash, proof[i]);
        }
        return computedHash;
    }

    /**
     * @dev Calldata version of {processProof}
     *
     * _Available since v4.7._
     */
    function processProofCalldata(bytes32[] calldata proof, bytes32 leaf) internal pure returns (bytes32) {
        bytes32 computedHash = leaf;
        for (uint256 i = 0; i < proof.length; i++) {
            computedHash = _hashPair(computedHash, proof[i]);
        }
        return computedHash;
    }

    /**
     * @dev Returns true if the `leaves` can be proved to be a part of a Merkle tree defined by
     * `root`, according to `proof` and `proofFlags` as described in {processMultiProof}.
     *
     * _Available since v4.7._
     */
    function multiProofVerify(
        bytes32[] memory proof,
        bool[] memory proofFlags,
        bytes32 root,
        bytes32[] memory leaves
    ) internal pure returns (bool) {
        return processMultiProof(proof, proofFlags, leaves) == root;
    }

    /**
     * @dev Calldata version of {multiProofVerify}
     *
     * _Available since v4.7._
     */
    function multiProofVerifyCalldata(
        bytes32[] calldata proof,
        bool[] calldata proofFlags,
        bytes32 root,
        bytes32[] memory leaves
    ) internal pure returns (bool) {
        return processMultiProofCalldata(proof, proofFlags, leaves) == root;
    }

    /**
     * @dev Returns the root of a tree reconstructed from `leaves` and the sibling nodes in `proof`,
     * consuming from one or the other at each step according to the instructions given by
     * `proofFlags`.
     *
     * _Available since v4.7._
     */
    function processMultiProof(
        bytes32[] memory proof,
        bool[] memory proofFlags,
        bytes32[] memory leaves
    ) internal pure returns (bytes32 merkleRoot) {
        // This function rebuild the root hash by traversing the tree up from the leaves. The root is rebuilt by
        // consuming and producing values on a queue. The queue starts with the `leaves` array, then goes onto the
        // `hashes` array. At the end of the process, the last hash in the `hashes` array should contain the root of
        // the merkle tree.
        uint256 leavesLen = leaves.length;
        uint256 totalHashes = proofFlags.length;

        // Check proof validity.
        require(leavesLen + proof.length - 1 == totalHashes, "MerkleProof: invalid multiproof");

        // The xxxPos values are "pointers" to the next value to consume in each array. All accesses are done using
        // `xxx[xxxPos++]`, which return the current value and increment the pointer, thus mimicking a queue's "pop".
        bytes32[] memory hashes = new bytes32[](totalHashes);
        uint256 leafPos = 0;
        uint256 hashPos = 0;
        uint256 proofPos = 0;
        // At each step, we compute the next hash using two values:
        // - a value from the "main queue". If not all leaves have been consumed, we get the next leaf, otherwise we
        //   get the next hash.
        // - depending on the flag, either another value for the "main queue" (merging branches) or an element from the
        //   `proof` array.
        for (uint256 i = 0; i < totalHashes; i++) {
            bytes32 a = leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++];
            bytes32 b = proofFlags[i] ? leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++] : proof[proofPos++];
            hashes[i] = _hashPair(a, b);
        }

        if (totalHashes > 0) {
            return hashes[totalHashes - 1];
        } else if (leavesLen > 0) {
            return leaves[0];
        } else {
            return proof[0];
        }
    }

    /**
     * @dev Calldata version of {processMultiProof}
     *
     * _Available since v4.7._
     */
    function processMultiProofCalldata(
        bytes32[] calldata proof,
        bool[] calldata proofFlags,
        bytes32[] memory leaves
    ) internal pure returns (bytes32 merkleRoot) {
        // This function rebuild the root hash by traversing the tree up from the leaves. The root is rebuilt by
        // consuming and producing values on a queue. The queue starts with the `leaves` array, then goes onto the
        // `hashes` array. At the end of the process, the last hash in the `hashes` array should contain the root of
        // the merkle tree.
        uint256 leavesLen = leaves.length;
        uint256 totalHashes = proofFlags.length;

        // Check proof validity.
        require(leavesLen + proof.length - 1 == totalHashes, "MerkleProof: invalid multiproof");

        // The xxxPos values are "pointers" to the next value to consume in each array. All accesses are done using
        // `xxx[xxxPos++]`, which return the current value and increment the pointer, thus mimicking a queue's "pop".
        bytes32[] memory hashes = new bytes32[](totalHashes);
        uint256 leafPos = 0;
        uint256 hashPos = 0;
        uint256 proofPos = 0;
        // At each step, we compute the next hash using two values:
        // - a value from the "main queue". If not all leaves have been consumed, we get the next leaf, otherwise we
        //   get the next hash.
        // - depending on the flag, either another value for the "main queue" (merging branches) or an element from the
        //   `proof` array.
        for (uint256 i = 0; i < totalHashes; i++) {
            bytes32 a = leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++];
            bytes32 b = proofFlags[i] ? leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++] : proof[proofPos++];
            hashes[i] = _hashPair(a, b);
        }

        if (totalHashes > 0) {
            return hashes[totalHashes - 1];
        } else if (leavesLen > 0) {
            return leaves[0];
        } else {
            return proof[0];
        }
    }

    function _hashPair(bytes32 a, bytes32 b) private pure returns (bytes32) {
        return a < b ? _efficientHash(a, b) : _efficientHash(b, a);
    }

    function _efficientHash(bytes32 a, bytes32 b) private pure returns (bytes32 value) {
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x00, a)
            mstore(0x20, b)
            value := keccak256(0x00, 0x40)
        }
    }
}

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

pragma solidity ^0.8.0;

interface IAdminACLV0 {
    /**
     * @notice Token ID `_tokenId` minted to `_to`.
     * @param previousSuperAdmin The previous superAdmin address.
     * @param newSuperAdmin The new superAdmin address.
     * @param genArt721CoreAddressesToUpdate Array of genArt721Core
     * addresses to update to the new superAdmin, for indexing purposes only.
     */
    event SuperAdminTransferred(
        address indexed previousSuperAdmin,
        address indexed newSuperAdmin,
        address[] genArt721CoreAddressesToUpdate
    );

    /// Type of the Admin ACL contract, e.g. "AdminACLV0"
    function AdminACLType() external view returns (string memory);

    /// super admin address
    function superAdmin() external view returns (address);

    /**
     * @notice Calls transferOwnership on other contract from this contract.
     * This is useful for updating to a new AdminACL contract.
     * @dev this function should be gated to only superAdmin-like addresses.
     */
    function transferOwnershipOn(
        address _contract,
        address _newAdminACL
    ) external;

    /**
     * @notice Calls renounceOwnership on other contract from this contract.
     * @dev this function should be gated to only superAdmin-like addresses.
     */
    function renounceOwnershipOn(address _contract) external;

    /**
     * @notice Checks if sender `_sender` is allowed to call function with selector
     * `_selector` on contract `_contract`.
     */
    function allowed(
        address _sender,
        address _contract,
        bytes4 _selector
    ) external returns (bool);
}

// SPDX-License-Identifier: CC0-1.0
pragma solidity ^0.8.17;

/// @dev Source: https://github.com/0xfoobar/delegation-registry/blob/main/src/IDelegationRegistry.sol

/**
 * @title An immutable registry contract to be deployed as a standalone primitive
 * @dev See EIP-5639, new project launches can read previous cold wallet -> hot wallet delegations
 * from here and integrate those permissions into their flow
 */
interface IDelegationRegistry {
    /// @notice Delegation type
    enum DelegationType {
        NONE,
        ALL,
        CONTRACT,
        TOKEN
    }

    /// @notice Info about a single delegation, used for onchain enumeration
    struct DelegationInfo {
        DelegationType type_;
        address vault;
        address delegate;
        address contract_;
        uint256 tokenId;
    }

    /// @notice Info about a single contract-level delegation
    struct ContractDelegation {
        address contract_;
        address delegate;
    }

    /// @notice Info about a single token-level delegation
    struct TokenDelegation {
        address contract_;
        uint256 tokenId;
        address delegate;
    }

    /// @notice Emitted when a user delegates their entire wallet
    event DelegateForAll(address vault, address delegate, bool value);

    /// @notice Emitted when a user delegates a specific contract
    event DelegateForContract(
        address vault,
        address delegate,
        address contract_,
        bool value
    );

    /// @notice Emitted when a user delegates a specific token
    event DelegateForToken(
        address vault,
        address delegate,
        address contract_,
        uint256 tokenId,
        bool value
    );

    /// @notice Emitted when a user revokes all delegations
    event RevokeAllDelegates(address vault);

    /// @notice Emitted when a user revoes all delegations for a given delegate
    event RevokeDelegate(address vault, address delegate);

    /**
     * -----------  WRITE -----------
     */

    /**
     * @notice Allow the delegate to act on your behalf for all contracts
     * @param delegate The hotwallet to act on your behalf
     * @param value Whether to enable or disable delegation for this address, true for setting and false for revoking
     */
    function delegateForAll(address delegate, bool value) external;

    /**
     * @notice Allow the delegate to act on your behalf for a specific contract
     * @param delegate The hotwallet to act on your behalf
     * @param contract_ The address for the contract you're delegating
     * @param value Whether to enable or disable delegation for this address, true for setting and false for revoking
     */
    function delegateForContract(
        address delegate,
        address contract_,
        bool value
    ) external;

    /**
     * @notice Allow the delegate to act on your behalf for a specific token
     * @param delegate The hotwallet to act on your behalf
     * @param contract_ The address for the contract you're delegating
     * @param tokenId The token id for the token you're delegating
     * @param value Whether to enable or disable delegation for this address, true for setting and false for revoking
     */
    function delegateForToken(
        address delegate,
        address contract_,
        uint256 tokenId,
        bool value
    ) external;

    /**
     * @notice Revoke all delegates
     */
    function revokeAllDelegates() external;

    /**
     * @notice Revoke a specific delegate for all their permissions
     * @param delegate The hotwallet to revoke
     */
    function revokeDelegate(address delegate) external;

    /**
     * @notice Remove yourself as a delegate for a specific vault
     * @param vault The vault which delegated to the msg.sender, and should be removed
     */
    function revokeSelf(address vault) external;

    /**
     * -----------  READ -----------
     */

    /**
     * @notice Returns all active delegations a given delegate is able to claim on behalf of
     * @param delegate The delegate that you would like to retrieve delegations for
     * @return info Array of DelegationInfo structs
     */
    function getDelegationsByDelegate(
        address delegate
    ) external view returns (DelegationInfo[] memory);

    /**
     * @notice Returns an array of wallet-level delegates for a given vault
     * @param vault The cold wallet who issued the delegation
     * @return addresses Array of wallet-level delegates for a given vault
     */
    function getDelegatesForAll(
        address vault
    ) external view returns (address[] memory);

    /**
     * @notice Returns an array of contract-level delegates for a given vault and contract
     * @param vault The cold wallet who issued the delegation
     * @param contract_ The address for the contract you're delegating
     * @return addresses Array of contract-level delegates for a given vault and contract
     */
    function getDelegatesForContract(
        address vault,
        address contract_
    ) external view returns (address[] memory);

    /**
     * @notice Returns an array of contract-level delegates for a given vault's token
     * @param vault The cold wallet who issued the delegation
     * @param contract_ The address for the contract holding the token
     * @param tokenId The token id for the token you're delegating
     * @return addresses Array of contract-level delegates for a given vault's token
     */
    function getDelegatesForToken(
        address vault,
        address contract_,
        uint256 tokenId
    ) external view returns (address[] memory);

    /**
     * @notice Returns all contract-level delegations for a given vault
     * @param vault The cold wallet who issued the delegations
     * @return delegations Array of ContractDelegation structs
     */
    function getContractLevelDelegations(
        address vault
    ) external view returns (ContractDelegation[] memory delegations);

    /**
     * @notice Returns all token-level delegations for a given vault
     * @param vault The cold wallet who issued the delegations
     * @return delegations Array of TokenDelegation structs
     */
    function getTokenLevelDelegations(
        address vault
    ) external view returns (TokenDelegation[] memory delegations);

    /**
     * @notice Returns true if the address is delegated to act on the entire vault
     * @param delegate The hotwallet to act on your behalf
     * @param vault The cold wallet who issued the delegation
     */
    function checkDelegateForAll(
        address delegate,
        address vault
    ) external view returns (bool);

    /**
     * @notice Returns true if the address is delegated to act on your behalf for a token contract or an entire vault
     * @param delegate The hotwallet to act on your behalf
     * @param contract_ The address for the contract you're delegating
     * @param vault The cold wallet who issued the delegation
     */
    function checkDelegateForContract(
        address delegate,
        address vault,
        address contract_
    ) external view returns (bool);

    /**
     * @notice Returns true if the address is delegated to act on your behalf for a specific token, the token's contract or an entire vault
     * @param delegate The hotwallet to act on your behalf
     * @param contract_ The address for the contract you're delegating
     * @param tokenId The token id for the token you're delegating
     * @param vault The cold wallet who issued the delegation
     */
    function checkDelegateForToken(
        address delegate,
        address vault,
        address contract_,
        uint256 tokenId
    ) external view returns (bool);
}

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

import "./IFilteredMinterV1.sol";

pragma solidity ^0.8.0;

/**
 * @title This interface extends the IFilteredMinterV1 interface in order to
 * add support for including Merkle proofs when purchasing.
 * @author Art Blocks Inc.
 */
interface IFilteredMinterMerkleV0 is IFilteredMinterV1 {
    /**
     * @notice Notifies of the contract's default maximum mints allowed per
     * user for a given project, on this minter. This value can be overridden
     * by the artist of any project at any time.
     */
    event DefaultMaxInvocationsPerAddress(
        uint256 defaultMaxInvocationsPerAddress
    );

    // Triggers a purchase of a token from the desired project, to the
    // TX-sending address. Requires Merkle proof.
    function purchase(
        uint256 _projectId,
        bytes32[] memory _proof
    ) external payable returns (uint256 tokenId);

    // Triggers a purchase of a token from the desired project, to the specified
    // receiving address. Requires Merkle proof.
    function purchaseTo(
        address _to,
        uint256 _projectId,
        bytes32[] memory _proof
    ) external payable returns (uint256 tokenId);
}

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

import "./IFilteredMinterMerkleV0.sol";

pragma solidity ^0.8.0;

/**
 * @title This interface extends the IFilteredMinterMerkleV0 interface in order
 * to add support for configuring and indexing the delegation registry address.
 * @author Art Blocks Inc.
 */
interface IFilteredMinterMerkleV1 is IFilteredMinterMerkleV0 {
    /**
     * @notice Notifies of the contract's configured delegation registry
     * address.
     */
    event DelegationRegistryUpdated(address delegationRegistryAddress);
}

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

import "./IFilteredMinterMerkleV1.sol";
import "./IFilteredMinterV2.sol";

pragma solidity ^0.8.0;

/**
 * @title This interface extends the IFilteredMinterMerkleV0 interface in order to
 * add support for manually setting project max invocations.
 * @author Art Blocks Inc.
 */
interface IFilteredMinterMerkleV2 is
    IFilteredMinterMerkleV1,
    IFilteredMinterV2
{

}

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

pragma solidity ^0.8.0;

interface IFilteredMinterV0 {
    /**
     * @notice Price per token in wei updated for project `_projectId` to
     * `_pricePerTokenInWei`.
     */
    event PricePerTokenInWeiUpdated(
        uint256 indexed _projectId,
        uint256 indexed _pricePerTokenInWei
    );

    /**
     * @notice Currency updated for project `_projectId` to symbol
     * `_currencySymbol` and address `_currencyAddress`.
     */
    event ProjectCurrencyInfoUpdated(
        uint256 indexed _projectId,
        address indexed _currencyAddress,
        string _currencySymbol
    );

    /// togglePurchaseToDisabled updated
    event PurchaseToDisabledUpdated(
        uint256 indexed _projectId,
        bool _purchaseToDisabled
    );

    // getter function of public variable
    function minterType() external view returns (string memory);

    function genArt721CoreAddress() external returns (address);

    function minterFilterAddress() external returns (address);

    // Triggers a purchase of a token from the desired project, to the
    // TX-sending address.
    function purchase(
        uint256 _projectId
    ) external payable returns (uint256 tokenId);

    // Triggers a purchase of a token from the desired project, to the specified
    // receiving address.
    function purchaseTo(
        address _to,
        uint256 _projectId
    ) external payable returns (uint256 tokenId);

    // Toggles the ability for `purchaseTo` to be called directly with a
    // specified receiving address that differs from the TX-sending address.
    function togglePurchaseToDisabled(uint256 _projectId) external;

    // Called to make the minter contract aware of the max invocations for a
    // given project.
    function setProjectMaxInvocations(uint256 _projectId) external;

    // Gets if token price is configured, token price in wei, currency symbol,
    // and currency address, assuming this is project's minter.
    // Supersedes any defined core price.
    function getPriceInfo(
        uint256 _projectId
    )
        external
        view
        returns (
            bool isConfigured,
            uint256 tokenPriceInWei,
            string memory currencySymbol,
            address currencyAddress
        );
}

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

import "./IFilteredMinterV0.sol";

pragma solidity ^0.8.0;

/**
 * @title This interface extends the IFilteredMinterV0 interface in order to
 * add support for generic project minter configuration updates.
 * @dev keys represent strings of finite length encoded in bytes32 to minimize
 * gas.
 * @author Art Blocks Inc.
 */
interface IFilteredMinterV1 is IFilteredMinterV0 {
    /// ANY
    /**
     * @notice Generic project minter configuration event. Removes key `_key`
     * for project `_projectId`.
     */
    event ConfigKeyRemoved(uint256 indexed _projectId, bytes32 _key);

    /// BOOL
    /**
     * @notice Generic project minter configuration event. Sets value of key
     * `_key` to `_value` for project `_projectId`.
     */
    event ConfigValueSet(uint256 indexed _projectId, bytes32 _key, bool _value);

    /// UINT256
    /**
     * @notice Generic project minter configuration event. Sets value of key
     * `_key` to `_value` for project `_projectId`.
     */
    event ConfigValueSet(
        uint256 indexed _projectId,
        bytes32 _key,
        uint256 _value
    );

    /**
     * @notice Generic project minter configuration event. Adds value `_value`
     * to the set of uint256 at key `_key` for project `_projectId`.
     */
    event ConfigValueAddedToSet(
        uint256 indexed _projectId,
        bytes32 _key,
        uint256 _value
    );

    /**
     * @notice Generic project minter configuration event. Removes value
     * `_value` to the set of uint256 at key `_key` for project `_projectId`.
     */
    event ConfigValueRemovedFromSet(
        uint256 indexed _projectId,
        bytes32 _key,
        uint256 _value
    );

    /// ADDRESS
    /**
     * @notice Generic project minter configuration event. Sets value of key
     * `_key` to `_value` for project `_projectId`.
     */
    event ConfigValueSet(
        uint256 indexed _projectId,
        bytes32 _key,
        address _value
    );

    /**
     * @notice Generic project minter configuration event. Adds value `_value`
     * to the set of addresses at key `_key` for project `_projectId`.
     */
    event ConfigValueAddedToSet(
        uint256 indexed _projectId,
        bytes32 _key,
        address _value
    );

    /**
     * @notice Generic project minter configuration event. Removes value
     * `_value` to the set of addresses at key `_key` for project `_projectId`.
     */
    event ConfigValueRemovedFromSet(
        uint256 indexed _projectId,
        bytes32 _key,
        address _value
    );

    /// BYTES32
    /**
     * @notice Generic project minter configuration event. Sets value of key
     * `_key` to `_value` for project `_projectId`.
     */
    event ConfigValueSet(
        uint256 indexed _projectId,
        bytes32 _key,
        bytes32 _value
    );

    /**
     * @notice Generic project minter configuration event. Adds value `_value`
     * to the set of bytes32 at key `_key` for project `_projectId`.
     */
    event ConfigValueAddedToSet(
        uint256 indexed _projectId,
        bytes32 _key,
        bytes32 _value
    );

    /**
     * @notice Generic project minter configuration event. Removes value
     * `_value` to the set of bytes32 at key `_key` for project `_projectId`.
     */
    event ConfigValueRemovedFromSet(
        uint256 indexed _projectId,
        bytes32 _key,
        bytes32 _value
    );

    /**
     * @dev Strings not supported. Recommend conversion of (short) strings to
     * bytes32 to remain gas-efficient.
     */
}

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

import "./IFilteredMinterV1.sol";

pragma solidity ^0.8.0;

/**
 * @title This interface extends the IFilteredMinterV1 interface in order to
 * add support for manually setting project max invocations.
 * @author Art Blocks Inc.
 */
interface IFilteredMinterV2 is IFilteredMinterV1 {
    /**
     * @notice Local max invocations for project `_projectId`, tied to core contract `_coreContractAddress`,
     * updated to `_maxInvocations`.
     */
    event ProjectMaxInvocationsLimitUpdated(
        uint256 indexed _projectId,
        uint256 _maxInvocations
    );

    // Sets the local max invocations for a given project, checking that the provided max invocations is
    // less than or equal to the global max invocations for the project set on the core contract.
    // This does not impact the max invocations value defined on the core contract.
    function manuallyLimitProjectMaxInvocations(
        uint256 _projectId,
        uint256 _maxInvocations
    ) external;
}

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

pragma solidity ^0.8.0;

import "./IAdminACLV0.sol";
/// use the Royalty Registry's IManifold interface for token royalties
import "./IManifold.sol";

/**
 * @title This interface is intended to house interface items that are common
 * across all GenArt721CoreContractV3 flagship and derivative implementations.
 * This interface extends the IManifold royalty interface in order to
 * add support the Royalty Registry by default.
 * @author Art Blocks Inc.
 */
interface IGenArt721CoreContractV3_Base is IManifold {
    /**
     * @notice Token ID `_tokenId` minted to `_to`.
     */
    event Mint(address indexed _to, uint256 indexed _tokenId);

    /**
     * @notice currentMinter updated to `_currentMinter`.
     * @dev Implemented starting with V3 core
     */
    event MinterUpdated(address indexed _currentMinter);

    /**
     * @notice Platform updated on bytes32-encoded field `_field`.
     */
    event PlatformUpdated(bytes32 indexed _field);

    /**
     * @notice Project ID `_projectId` updated on bytes32-encoded field
     * `_update`.
     */
    event ProjectUpdated(uint256 indexed _projectId, bytes32 indexed _update);

    event ProposedArtistAddressesAndSplits(
        uint256 indexed _projectId,
        address _artistAddress,
        address _additionalPayeePrimarySales,
        uint256 _additionalPayeePrimarySalesPercentage,
        address _additionalPayeeSecondarySales,
        uint256 _additionalPayeeSecondarySalesPercentage
    );

    event AcceptedArtistAddressesAndSplits(uint256 indexed _projectId);

    // version and type of the core contract
    // coreVersion is a string of the form "0.x.y"
    function coreVersion() external view returns (string memory);

    // coreType is a string of the form "GenArt721CoreV3"
    function coreType() external view returns (string memory);

    // owner (pre-V3 was named admin) of contract
    // this is expected to be an Admin ACL contract for V3
    function owner() external view returns (address);

    // Admin ACL contract for V3, will be at the address owner()
    function adminACLContract() external returns (IAdminACLV0);

    // backwards-compatible (pre-V3) admin - equal to owner()
    function admin() external view returns (address);

    /**
     * Function determining if _sender is allowed to call function with
     * selector _selector on contract `_contract`. Intended to be used with
     * peripheral contracts such as minters, as well as internally by the
     * core contract itself.
     */
    function adminACLAllowed(
        address _sender,
        address _contract,
        bytes4 _selector
    ) external returns (bool);

    // 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);

    // @dev this is not available in V0
    function isMintWhitelisted(address minter) external view returns (bool);

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

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

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

    // @dev new function in V3
    function projectStateData(
        uint256 _projectId
    )
        external
        view
        returns (
            uint256 invocations,
            uint256 maxInvocations,
            bool active,
            bool paused,
            uint256 completedTimestamp,
            bool locked
        );

    // function to set a token's hash (must be guarded)
    function setTokenHash_8PT(uint256 _tokenId, bytes32 _hash) external;

    // @dev gas-optimized signature in V3 for `mint`
    function mint_Ecf(
        address _to,
        uint256 _projectId,
        address _by
    ) external returns (uint256 tokenId);
}

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

pragma solidity ^0.8.0;

import "./IAdminACLV0.sol";
import "./IGenArt721CoreContractV3_Base.sol";

interface IGenArt721CoreContractV3_Engine is IGenArt721CoreContractV3_Base {
    // @dev new function in V3
    function getPrimaryRevenueSplits(
        uint256 _projectId,
        uint256 _price
    )
        external
        view
        returns (
            uint256 renderProviderRevenue_,
            address payable renderProviderAddress_,
            uint256 platformProviderRevenue_,
            address payable platformProviderAddress_,
            uint256 artistRevenue_,
            address payable artistAddress_,
            uint256 additionalPayeePrimaryRevenue_,
            address payable additionalPayeePrimaryAddress_
        );

    // @dev The render provider primary sales payment address
    function renderProviderPrimarySalesAddress()
        external
        view
        returns (address payable);

    // @dev The platform provider primary sales payment address
    function platformProviderPrimarySalesAddress()
        external
        view
        returns (address payable);

    // @dev Percentage of primary sales allocated to the render provider
    function renderProviderPrimarySalesPercentage()
        external
        view
        returns (uint256);

    // @dev Percentage of primary sales allocated to the platform provider
    function platformProviderPrimarySalesPercentage()
        external
        view
        returns (uint256);

    // @dev The render provider secondary sales royalties payment address
    function renderProviderSecondarySalesAddress()
        external
        view
        returns (address payable);

    // @dev The platform provider secondary sales royalties payment address
    function platformProviderSecondarySalesAddress()
        external
        view
        returns (address payable);

    // @dev Basis points of secondary sales allocated to the render provider
    function renderProviderSecondarySalesBPS() external view returns (uint256);

    // @dev Basis points of secondary sales allocated to the platform provider
    function platformProviderSecondarySalesBPS()
        external
        view
        returns (uint256);

    // function to read the hash for a given tokenId
    function tokenIdToHash(uint256 _tokenId) external view returns (bytes32);

    // function to read the hash-seed for a given tokenId
    function tokenIdToHashSeed(
        uint256 _tokenId
    ) external view returns (bytes12);
}

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

pragma solidity ^0.8.0;

import "./IAdminACLV0.sol";
import "./IGenArt721CoreContractV3_Base.sol";

/**
 * @title This interface extends IGenArt721CoreContractV3_Base with functions
 * that are part of the Art Blocks Flagship core contract.
 * @author Art Blocks Inc.
 */
// This interface extends IGenArt721CoreContractV3_Base with functions that are
// in part of the Art Blocks Flagship core contract.
interface IGenArt721CoreContractV3 is IGenArt721CoreContractV3_Base {
    // @dev new function in V3
    function getPrimaryRevenueSplits(
        uint256 _projectId,
        uint256 _price
    )
        external
        view
        returns (
            uint256 artblocksRevenue_,
            address payable artblocksAddress_,
            uint256 artistRevenue_,
            address payable artistAddress_,
            uint256 additionalPayeePrimaryRevenue_,
            address payable additionalPayeePrimaryAddress_
        );

    // @dev Art Blocks primary sales payment address
    function artblocksPrimarySalesAddress()
        external
        view
        returns (address payable);

    /**
     * @notice Backwards-compatible (pre-V3) function returning Art Blocks
     * primary sales payment address (now called artblocksPrimarySalesAddress).
     */
    function artblocksAddress() external view returns (address payable);

    // @dev Percentage of primary sales allocated to Art Blocks
    function artblocksPrimarySalesPercentage() external view returns (uint256);

    /**
     * @notice Backwards-compatible (pre-V3) function returning Art Blocks
     * primary sales percentage (now called artblocksPrimarySalesPercentage).
     */
    function artblocksPercentage() external view returns (uint256);

    // @dev Art Blocks secondary sales royalties payment address
    function artblocksSecondarySalesAddress()
        external
        view
        returns (address payable);

    // @dev Basis points of secondary sales allocated to Art Blocks
    function artblocksSecondarySalesBPS() external view returns (uint256);

    /**
     * @notice Backwards-compatible (pre-V3) function  that gets artist +
     * artist's additional payee royalty data for token ID `_tokenId`.
     * WARNING: Does not include Art Blocks portion of royalties.
     */
    function getRoyaltyData(
        uint256 _tokenId
    )
        external
        view
        returns (
            address artistAddress,
            address additionalPayee,
            uint256 additionalPayeePercentage,
            uint256 royaltyFeeByID
        );
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/// @dev Royalty Registry interface, used to support the Royalty Registry.
/// @dev Source: https://github.com/manifoldxyz/royalty-registry-solidity/blob/main/contracts/specs/IManifold.sol

/// @author: manifold.xyz

/**
 * @dev Royalty interface for creator core classes
 */
interface IManifold {
    /**
     * @dev Get royalites of a token.  Returns list of receivers and basisPoints
     *
     *  bytes4(keccak256('getRoyalties(uint256)')) == 0xbb3bafd6
     *
     *  => 0xbb3bafd6 = 0xbb3bafd6
     */
    function getRoyalties(
        uint256 tokenId
    ) external view returns (address payable[] memory, uint256[] memory);
}

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

import "./IFilteredMinterV2.sol";

pragma solidity ^0.8.0;

/**
 * @title This interface defines any events or functions required for a minter
 * to conform to the MinterBase contract.
 * @dev The MinterBase contract was not implemented from the beginning of the
 * MinterSuite contract suite, therefore early versions of some minters may not
 * conform to this interface.
 * @author Art Blocks Inc.
 */
interface IMinterBaseV0 {
    // Function that returns if a minter is configured to integrate with a V3 flagship or V3 engine contract.
    // Returns true only if the minter is configured to integrate with an engine contract.
    function isEngine() external returns (bool isEngine);
}

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

pragma solidity ^0.8.0;

interface IMinterFilterV0 {
    /**
     * @notice Approved minter `_minterAddress`.
     */
    event MinterApproved(address indexed _minterAddress, string _minterType);

    /**
     * @notice Revoked approval for minter `_minterAddress`
     */
    event MinterRevoked(address indexed _minterAddress);

    /**
     * @notice Minter `_minterAddress` of type `_minterType`
     * registered for project `_projectId`.
     */
    event ProjectMinterRegistered(
        uint256 indexed _projectId,
        address indexed _minterAddress,
        string _minterType
    );

    /**
     * @notice Any active minter removed for project `_projectId`.
     */
    event ProjectMinterRemoved(uint256 indexed _projectId);

    function genArt721CoreAddress() external returns (address);

    function setMinterForProject(uint256, address) external;

    function removeMinterForProject(uint256) external;

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

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

    function projectHasMinter(uint256) external view returns (bool);
}

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

import "../../interfaces/0.8.x/IMinterBaseV0.sol";
import "../../interfaces/0.8.x/IGenArt721CoreContractV3_Base.sol";
import "../../interfaces/0.8.x/IGenArt721CoreContractV3.sol";
import "../../interfaces/0.8.x/IGenArt721CoreContractV3_Engine.sol";

import "@openzeppelin-4.7/contracts/token/ERC20/IERC20.sol";

pragma solidity ^0.8.0;

/**
 * @title Art Blocks Minter Base Class
 * @notice A base class for Art Blocks minter contracts that provides common
 * functionality used across minter contracts.
 * This contract is not intended to be deployed directly, but rather to be
 * inherited by other minter contracts.
 * From a design perspective, this contract is intended to remain simple and
 * easy to understand. It is not intended to cause a complex inheritance tree,
 * and instead should keep minter contracts as readable as possible for
 * collectors and developers.
 * @dev Semantic versioning is used in the solidity file name, and is therefore
 * controlled by contracts importing the appropriate filename version.
 * @author Art Blocks Inc.
 */
abstract contract MinterBase is IMinterBaseV0 {
    /// state variable that tracks whether this contract's associated core
    /// contract is an Engine contract, where Engine contracts have an
    /// additional revenue split for the platform provider
    bool public immutable isEngine;

    // @dev we do not track an initialization state, as the only state variable
    // is immutable, which the compiler enforces to be assigned during
    // construction.

    /**
     * @notice Initializes contract to ensure state variable `isEngine` is set
     * appropriately based on the minter's associated core contract address.
     * @param genArt721Address Art Blocks core contract address for
     * which this contract will be a minter.
     */
    constructor(address genArt721Address) {
        // set state variable isEngine
        isEngine = _getV3CoreIsEngine(genArt721Address);
    }

    /**
     * @notice splits ETH funds between sender (if refund), providers,
     * artist, and artist's additional payee for a token purchased on
     * project `_projectId`.
     * WARNING: This function uses msg.value and msg.sender to determine
     * refund amounts, and therefore may not be applicable to all use cases
     * (e.g. do not use with Dutch Auctions with on-chain settlement).
     * @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 pricePerTokenInWei Current price of token, in Wei.
     */
    function splitFundsETH(
        uint256 projectId,
        uint256 pricePerTokenInWei,
        address genArt721CoreAddress
    ) internal {
        if (msg.value > 0) {
            bool success_;
            // send refund to sender
            uint256 refund = msg.value - pricePerTokenInWei;
            if (refund > 0) {
                (success_, ) = msg.sender.call{value: refund}("");
                require(success_, "Refund failed");
            }
            // split revenues
            splitRevenuesETH(
                projectId,
                pricePerTokenInWei,
                genArt721CoreAddress
            );
        }
    }

    /**
     * @notice splits ETH revenues between providers, artist, and artist's
     * additional payee for revenue generated by 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 valueInWei Value to be split, in Wei.
     */
    function splitRevenuesETH(
        uint256 projectId,
        uint256 valueInWei,
        address genArtCoreContract
    ) internal {
        if (valueInWei <= 0) {
            return; // return early
        }
        bool success;
        // split funds between platforms, artist, and artist's
        // additional payee
        uint256 renderProviderRevenue_;
        address payable renderProviderAddress_;
        uint256 artistRevenue_;
        address payable artistAddress_;
        uint256 additionalPayeePrimaryRevenue_;
        address payable additionalPayeePrimaryAddress_;
        if (isEngine) {
            // get engine splits
            uint256 platformProviderRevenue_;
            address payable platformProviderAddress_;
            (
                renderProviderRevenue_,
                renderProviderAddress_,
                platformProviderRevenue_,
                platformProviderAddress_,
                artistRevenue_,
                artistAddress_,
                additionalPayeePrimaryRevenue_,
                additionalPayeePrimaryAddress_
            ) = IGenArt721CoreContractV3_Engine(genArtCoreContract)
                .getPrimaryRevenueSplits(projectId, valueInWei);
            // Platform Provider payment (only possible if engine)
            if (platformProviderRevenue_ > 0) {
                (success, ) = platformProviderAddress_.call{
                    value: platformProviderRevenue_
                }("");
                require(success, "Platform Provider payment failed");
            }
        } else {
            // get flagship splits
            (
                renderProviderRevenue_, // artblocks revenue
                renderProviderAddress_, // artblocks address
                artistRevenue_,
                artistAddress_,
                additionalPayeePrimaryRevenue_,
                additionalPayeePrimaryAddress_
            ) = IGenArt721CoreContractV3(genArtCoreContract)
                .getPrimaryRevenueSplits(projectId, valueInWei);
        }
        // Render Provider / Art Blocks payment
        if (renderProviderRevenue_ > 0) {
            (success, ) = renderProviderAddress_.call{
                value: renderProviderRevenue_
            }("");
            require(success, "Render Provider payment failed");
        }
        // artist payment
        if (artistRevenue_ > 0) {
            (success, ) = artistAddress_.call{value: artistRevenue_}("");
            require(success, "Artist payment failed");
        }
        // additional payee payment
        if (additionalPayeePrimaryRevenue_ > 0) {
            (success, ) = additionalPayeePrimaryAddress_.call{
                value: additionalPayeePrimaryRevenue_
            }("");
            require(success, "Additional Payee payment failed");
        }
    }

    /**
     * @notice splits ERC-20 funds between providers, 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.
     */
    function splitFundsERC20(
        uint256 projectId,
        uint256 pricePerTokenInWei,
        address currencyAddress,
        address genArtCoreContract
    ) internal {
        IERC20 _projectCurrency = IERC20(currencyAddress);
        // split remaining funds between foundation, artist, and artist's
        // additional payee
        uint256 renderProviderRevenue_;
        address payable renderProviderAddress_;
        uint256 artistRevenue_;
        address payable artistAddress_;
        uint256 additionalPayeePrimaryRevenue_;
        address payable additionalPayeePrimaryAddress_;
        if (isEngine) {
            // get engine splits
            uint256 platformProviderRevenue_;
            address payable platformProviderAddress_;
            (
                renderProviderRevenue_,
                renderProviderAddress_,
                platformProviderRevenue_,
                platformProviderAddress_,
                artistRevenue_,
                artistAddress_,
                additionalPayeePrimaryRevenue_,
                additionalPayeePrimaryAddress_
            ) = IGenArt721CoreContractV3_Engine(genArtCoreContract)
                .getPrimaryRevenueSplits(projectId, pricePerTokenInWei);
            // Platform Provider payment (only possible if engine)
            if (platformProviderRevenue_ > 0) {
                _projectCurrency.transferFrom(
                    msg.sender,
                    platformProviderAddress_,
                    platformProviderRevenue_
                );
            }
        } else {
            // get flagship splits
            (
                renderProviderRevenue_, // artblocks revenue
                renderProviderAddress_, // artblocks address
                artistRevenue_,
                artistAddress_,
                additionalPayeePrimaryRevenue_,
                additionalPayeePrimaryAddress_
            ) = IGenArt721CoreContractV3(genArtCoreContract)
                .getPrimaryRevenueSplits(projectId, pricePerTokenInWei);
        }
        // Art Blocks payment
        if (renderProviderRevenue_ > 0) {
            _projectCurrency.transferFrom(
                msg.sender,
                renderProviderAddress_,
                renderProviderRevenue_
            );
        }
        // artist payment
        if (artistRevenue_ > 0) {
            _projectCurrency.transferFrom(
                msg.sender,
                artistAddress_,
                artistRevenue_
            );
        }
        // additional payee payment
        if (additionalPayeePrimaryRevenue_ > 0) {
            _projectCurrency.transferFrom(
                msg.sender,
                additionalPayeePrimaryAddress_,
                additionalPayeePrimaryRevenue_
            );
        }
    }

    /**
     * @notice Returns whether a V3 core contract is an Art Blocks Engine
     * contract or not. Return value of false indicates that the core is a
     * flagship contract.
     * @dev this function reverts if a core contract does not return the
     * expected number of return values from getPrimaryRevenueSplits() for
     * either a flagship or engine core contract.
     * @dev this function uses the length of the return data (in bytes) to
     * determine whether the core is an engine or not.
     * @param genArt721CoreV3 The address of the deployed core contract.
     */
    function _getV3CoreIsEngine(
        address genArt721CoreV3
    ) private returns (bool) {
        // call getPrimaryRevenueSplits() on core contract
        bytes memory payload = abi.encodeWithSignature(
            "getPrimaryRevenueSplits(uint256,uint256)",
            0,
            0
        );
        (bool success, bytes memory returnData) = genArt721CoreV3.call(payload);
        require(success, "getPrimaryRevenueSplits() call failed");
        // determine whether core is engine or not, based on return data length
        uint256 returnDataLength = returnData.length;
        if (returnDataLength == 6 * 32) {
            // 6 32-byte words returned if flagship (not engine)
            // @dev 6 32-byte words are expected because the non-engine core
            // contracts return a payout address and uint256 payment value for
            // the artist, and artist's additional payee, and Art Blocks.
            // also note that per Solidity ABI encoding, the address return
            // values are padded to 32 bytes.
            return false;
        } else if (returnDataLength == 8 * 32) {
            // 8 32-byte words returned if engine
            // @dev 8 32-byte words are expected because the engine core
            // contracts return a payout address and uint256 payment value for
            // the artist, artist's additional payee, render provider
            // typically Art Blocks, and platform provider (partner).
            // also note that per Solidity ABI encoding, the address return
            // values are padded to 32 bytes.
            return true;
        } else {
            // unexpected return value length
            revert("Unexpected revenue split bytes");
        }
    }
}

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

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me":"DEFAULT_MAX_INVOCATIONS_PER_ADDRESS","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"delegationRegistryAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"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":[{"internalType":"address","name":"_address","type":"address"}],"name":"hashAddress","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"isEngine","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_projectId","type":"uint256"},{"internalType":"uint256","name":"_maxInvocations","type":"uint256"}],"name":"manuallyLimitProjectMaxInvocations","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"minterFilterAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"minterType","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32[]","name":"_proof","type":"bytes32[]"},{"internalType":"address","name":"_address","type":"address"}],"name":"processProofForAddress","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"projectConfig","outputs":[{"internalType":"bool","name":"maxHasBeenInvoked","type":"bool"},{"internalType":"bool","name":"priceIsConfigured","type":"bool"},{"internalType":"bool","name":"useMaxInvocationsPerAddressOverride","type":"bool"},{"internalType":"uint24","name":"maxInvocationsPerAddressOverride","type":"uint24"},{"internalType":"uint24","name":"maxInvocations","type":"uint24"},{"internalType":"uint256","name":"pricePerTokenInWei","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":"projectMaxInvocationsPerAddress","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"projectMerkleRoot","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_projectId","type":"uint256"},{"internalType":"address","name":"_address","type":"address"}],"name":"projectRemainingInvocationsForAddress","outputs":[{"internalType":"bool","name":"projectLimitsMintInvocationsPerAddress","type":"bool"},{"internalType":"uint256","name":"mintInvocationsRemaining","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"address","name":"","type":"address"}],"name":"projectUserMintInvocations","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_projectId","type":"uint256"},{"internalType":"bytes32[]","name":"_proof","type":"bytes32[]"}],"name":"purchase","outputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"purchase","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"_to","type":"address"},{"internalType":"uint256","name":"_projectId","type":"uint256"},{"internalType":"bytes32[]","name":"_proof","type":"bytes32[]"}],"name":"purchaseTo","outputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"ad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00000000000000000000000099a9b7c1116f9ceeb1652de04d5969cce509b069000000000000000000000000092b8f64e713d66b38522978bcf4649db14b931e00000000000000000000000000000000000076a84fef008cdabe6409d2fe638b

-----Decoded View---------------
Arg [0] : _genArt721Address (address): 0x99a9B7c1116f9ceEB1652de04d5969CcE509B069
Arg [1] : _minterFilter (address): 0x092B8F64e713d66b38522978BCf4649db14b931E
Arg [2] : _delegationRegistryAddress (address): 0x00000000000076A84feF008CDAbe6409d2FE638B

-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 00000000000000000000000099a9b7c1116f9ceeb1652de04d5969cce509b069
Arg [1] : 000000000000000000000000092b8f64e713d66b38522978bcf4649db14b931e
Arg [2] : 00000000000000000000000000000000000076a84fef008cdabe6409d2fe638b