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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

import '@openzeppelin/contracts/interfaces/IERC2981.sol';
import '@openzeppelin/contracts/interfaces/IERC20.sol';
import '@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol';
import '@openzeppelin/contracts/utils/cryptography/ECDSA.sol';
import './Ownable_1_0_0.sol';
import 'erc721a/contracts/extensions/ERC721ABurnable.sol';
import './opensea-operator-filter/OperatorFilterer.sol';

contract HyperMintERC721A_2_2_0 is ERC721ABurnable, Ownable, OperatorFilterer {
    using SafeERC20 for IERC20;

    /* ================= CUSTOM ERRORS ================= */
    error NewSupplyTooLow();
    error MaxSupplyExceeded();
    error SignatureExpired();
    error NotAuthorised();
    error BuyDisabled();
    error InsufficientPaymentValue();
    error PublicSaleClosed();
    error SaleClosed();
    error MaxPerAddressExceeded();
    error MaxPerTransactionExceeded();
    error NonExistentToken();
    error ContractCallBlocked();
    error ImmutableRecoveryAddress();
    error TransfersDisabled();

    /* ================= STATE VARIABLES ================= */

    // ============== Structs ==============
    struct GeneralConfig {
        string name;
        string symbol;
        string contractMetadataUrl;
        string tokenMetadataUrl;
        bool allowBuy;
        bool allowPublicTransfer;
        bool enableOpenSeaOperatorFilterRegistry;
        uint256 publicSaleDate;
        uint256 saleCloseDate;
        uint256 primaryRoyaltyFee;
        uint256 secondaryRoyaltyFee;
    }

    struct Addresses {
        address recoveryAddress;
        address collectionOwnerAddress;
        address authorisationAddress;
        address purchaseTokenAddress;
        address managerPrimaryRoyaltyAddress;
        address customerPrimaryRoyaltyAddress;
        address secondaryRoyaltyAddress;
    }

    struct TokenConfig {
        uint256 price;
        uint256 maxSupply;
        uint256 maxPerTransaction;
    }

    // ========= Immutable Storage =========
    uint256 internal constant BASIS_POINTS = 10000;

    // ========== Mutable Storage ==========
    string public constant version = '2.2.0';

    GeneralConfig public generalConfig;
    TokenConfig public tokenConfig;
    Addresses public addresses;

    /* =================== CONSTRUCTOR =================== */
    /// @param _generalConfig settings for the contract
    /// @param _tokenConfig settings for tokens minted by the contract
    /// @param _addresses a collection of addresses
    constructor(
        GeneralConfig memory _generalConfig,
        TokenConfig memory _tokenConfig,
        Addresses memory _addresses
    )
        ERC721A('', '')
        OperatorFilterer(
            address(0x3cc6CddA760b79bAfa08dF41ECFA224f810dCeB6), // default filter by OS
            true // subscribe to the filter list
        )
    {
        _transferOwnership(_addresses.collectionOwnerAddress);
        generalConfig = _generalConfig;
        tokenConfig = _tokenConfig;
        addresses = _addresses;
    }

    /* ====================== Views ====================== */
    function name()
        public
        view
        override
        returns (string memory collectionName)
    {
        collectionName = generalConfig.name;
    }

    function symbol()
        public
        view
        override
        returns (string memory collectionSymbol)
    {
        collectionSymbol = generalConfig.symbol;
    }

    function supply() public view returns (uint256 _supply) {
        _supply = _totalMinted();
    }

    function totalMinted(address addr) public view returns (uint256 numMinted) {
        numMinted = _numberMinted(addr);
    }

    function contractURI() public view virtual returns (string memory uri) {
        uri = generalConfig.contractMetadataUrl;
    }

    function tokenURI(uint256 _tokenId)
        public
        view
        virtual
        override
        returns (string memory uri)
    {
        if (!_exists(_tokenId)) revert NonExistentToken();
        uri = string(
            abi.encodePacked(
                generalConfig.tokenMetadataUrl,
                _toString(_tokenId)
            )
        );
    }

    function royaltyInfo(uint256 _tokenId, uint256 _salePrice)
        external
        view
        returns (address royaltyAddress, uint256 royaltyAmount)
    {
        /// @dev secondary royalty to be paid out by the marketplace
        ///      to the splitter contract
        royaltyAddress = addresses.secondaryRoyaltyAddress;
        royaltyAmount =
            (_salePrice * generalConfig.secondaryRoyaltyFee) /
            BASIS_POINTS;
    }

    function supportsInterface(bytes4 _interfaceId)
        public
        view
        virtual
        override(ERC721A)
        returns (bool result)
    {
        result = (_interfaceId == type(IERC2981).interfaceId ||
            super.supportsInterface(_interfaceId));
    }

    /* ================ MUTATIVE FUNCTIONS ================ */

    // ============ Restricted =============
    function setNameAndSymbol(
        string calldata _newName,
        string calldata _newSymbol
    ) external onlyContractManager {
        generalConfig.name = _newName;
        generalConfig.symbol = _newSymbol;
    }

    function setMetadataURIs(
        string calldata _contractURI,
        string calldata _tokenURI
    ) external onlyContractManager {
        generalConfig.contractMetadataUrl = _contractURI;
        generalConfig.tokenMetadataUrl = _tokenURI;
    }

    function setDates(uint256 _publicSale, uint256 _saleClosed)
        external
        onlyContractManager
    {
        generalConfig.publicSaleDate = _publicSale;
        generalConfig.saleCloseDate = _saleClosed;
    }

    function setTokenConfig(
        uint256 _price,
        uint256 _maxSupply,
        uint256 _maxPerTransaction
    ) external onlyContractManager {
        if (totalSupply() > _maxSupply) revert NewSupplyTooLow();

        tokenConfig.price = _price;
        tokenConfig.maxSupply = _maxSupply;
        tokenConfig.maxPerTransaction = _maxPerTransaction;
    }

    function setAddresses(Addresses calldata _addresses)
        external
        onlyContractManager
    {
        if (_addresses.recoveryAddress != addresses.recoveryAddress)
            revert ImmutableRecoveryAddress();

        if (
            addresses.collectionOwnerAddress !=
            _addresses.collectionOwnerAddress
        ) {
            _transferOwnership(_addresses.collectionOwnerAddress);
        }

        addresses = _addresses;
    }

    function setAllowBuy(bool _allowBuy) external onlyContractManager {
        generalConfig.allowBuy = _allowBuy;
    }

    function setAllowPublicTransfer(bool _allowPublicTransfer)
        external
        onlyContractManager
    {
        generalConfig.allowPublicTransfer = _allowPublicTransfer;
    }

    function setEnableOpenSeaOperatorFilterRegistry(bool _enable) external onlyContractManager {
        generalConfig.enableOpenSeaOperatorFilterRegistry = _enable;
    }

    function setRoyalty(uint256 _primaryFee, uint256 _secondaryFee)
        external
        onlyContractManager
    {
        generalConfig.primaryRoyaltyFee = _primaryFee;
        generalConfig.secondaryRoyaltyFee = _secondaryFee;
    }

    // ============== Minting ==============
    function mintBatch(
        address[] calldata _accounts,
        uint256[] calldata _amounts
    ) external onlyContractManager nonContract {
        uint256 length = _accounts.length;

        for (uint256 i = 0; i < length; ) {
            address account = _accounts[i];
            uint256 amount = _amounts[i];

            if (supply() + amount > tokenConfig.maxSupply)
                revert MaxSupplyExceeded();

            _mint(account, amount);

            unchecked {
                i += 1;
            }
        }
    }

    // ================ Buy ================
    function buyAuthorised(
        uint256 _amount,
        uint256 _totalPrice,
        uint256 _maxPerAddress,
        uint256 _expires,
        bytes calldata _signature
    ) external payable buyAllowed nonContract {
        if (block.timestamp >= _expires) revert SignatureExpired();

        bytes32 hash = keccak256(
            abi.encodePacked(
                address(this),
                msg.sender,
                _amount,
                _totalPrice,
                _maxPerAddress,
                _expires
            )
        );

        bytes32 message = ECDSA.toEthSignedMessageHash(hash);

        if (
            ECDSA.recover(message, _signature) != addresses.authorisationAddress
        ) revert NotAuthorised();

        if (_maxPerAddress != 0) {
            if (_numberMinted(msg.sender) + _amount > _maxPerAddress)
                revert MaxPerAddressExceeded();
        }

        _buy(_amount, _totalPrice);
    }

    function buy(uint256 _amount) external payable buyAllowed nonContract {
        if (
            generalConfig.publicSaleDate == 0 ||
            block.timestamp < generalConfig.publicSaleDate
        ) revert PublicSaleClosed();

        uint256 totalPrice = tokenConfig.price * _amount;
        _buy(_amount, totalPrice);
    }

    function _buy(uint256 _amount, uint256 _totalPrice) internal {
        if (generalConfig.saleCloseDate != 0) {
            if (block.timestamp >= generalConfig.saleCloseDate)
                revert SaleClosed();
        }

        if (_totalMinted() + _amount > tokenConfig.maxSupply)
            revert MaxSupplyExceeded();

        if (tokenConfig.maxPerTransaction != 0) {
            if (_amount > tokenConfig.maxPerTransaction)
                revert MaxPerTransactionExceeded();
        }

        uint256 royaltyAmount = (_totalPrice *
            generalConfig.primaryRoyaltyFee) / BASIS_POINTS;

        if (addresses.purchaseTokenAddress != address(0)) {
            IERC20 token = IERC20(addresses.purchaseTokenAddress);
            /// @dev primary royalty cut for HyperMint
            token.safeTransferFrom(
                msg.sender,
                addresses.managerPrimaryRoyaltyAddress,
                royaltyAmount
            );
            /// @dev primary sale (i.e. minting revenue) for customer (or its payees)
            token.safeTransferFrom(
                msg.sender,
                addresses.customerPrimaryRoyaltyAddress,
                _totalPrice - royaltyAmount
            );
        } else {
            if (msg.value < _totalPrice) revert InsufficientPaymentValue();
            /// @dev primary royalty cut for HyperMint
            payable(addresses.managerPrimaryRoyaltyAddress).transfer(
                royaltyAmount
            );
            /// @dev primary sale (i.e. minting revenue) for customer (or its payees)
            payable(addresses.customerPrimaryRoyaltyAddress).transfer(
                _totalPrice - royaltyAmount
            );
        }

        /// @dev mint tokens
        _mint(msg.sender, _amount);
    }

    // ================ Transfers ================
    function _beforeTokenTransfers(
        address from,
        address to,
        uint256 startTokenId,
        uint256 quantity
    )
        internal
        override
        transferAllowed(from, to)
        onlyAllowedOperator(from, generalConfig.enableOpenSeaOperatorFilterRegistry)
    {
        super._beforeTokenTransfers(from, to, startTokenId, quantity);
    }

    function transferAuthorised(
        address _from,
        address _to,
        uint256 _tokenId,
        uint256 _expires,
        bytes calldata _signature
    ) external nonContract {
        if (block.timestamp >= _expires) revert SignatureExpired();

        bytes32 hash = keccak256(
            abi.encodePacked(
                address(this),
                msg.sender,
                _from,
                _to,
                _tokenId,
                _expires
            )
        );

        bytes32 message = ECDSA.toEthSignedMessageHash(hash);

        if (
            ECDSA.recover(message, _signature) != addresses.authorisationAddress
        ) revert NotAuthorised();

        super.safeTransferFrom(_from, _to, _tokenId);
    }

    // ============= Ownership =============
    function recoverContract() external {
        if (msg.sender != addresses.recoveryAddress) revert NotAuthorised();
        _transferContractManager(addresses.recoveryAddress);
    }

    function _startTokenId() internal pure override returns (uint256 tokenId) {
        tokenId = 1;
    }

    /* ==================== MODIFIERS ===================== */
    modifier buyAllowed() {
        if (!generalConfig.allowBuy) revert BuyDisabled();
        _;
    }

    /// @dev this eliminates the possibility of being called
    ///      from a contract
    modifier nonContract() {
        if (tx.origin != msg.sender) revert ContractCallBlocked();
        _;
    }

    modifier transferAllowed(address from, address to) {
        bool isMinting = from == address(0);
        bool isBurning = to == address(0);
        bool isContractManager = from == this.contractManager();
        bool isTransferAuthorised = msg.sig == this.transferAuthorised.selector;

        if (
            !isMinting &&
            !isContractManager &&
            !isBurning &&
            !isTransferAuthorised
        ) {
            if (!generalConfig.allowPublicTransfer) revert TransfersDisabled();
        }
        _;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.2;

import '@openzeppelin/contracts/interfaces/IERC2981.sol';
import '@openzeppelin/contracts/interfaces/IERC20.sol';
import '@openzeppelin/contracts/token/ERC1155/extensions/ERC1155Burnable.sol';
import '@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol';
import '@openzeppelin/contracts/utils/cryptography/ECDSA.sol';
import './Ownable_1_0_0.sol';

contract HyperMintERC1155_2_0_0 is ERC1155Burnable, Ownable {
    using SafeERC20 for IERC20;

    /* ================= CUSTOM ERRORS ================= */
    error NewSupplyTooLow();
    error ArrayLengthMismatch();
    error MaxSupplyExceeded();
    error SignatureExpired();
    error NotAuthorised();
    error BuyDisabled();
    error InsufficientPaymentValue();
    error PublicSaleClosed();
    error SaleClosed();
    error MaxPerTransactionsExceeded();
    error ContractCallBlocked();
    error ImmutableRecoveryAddress();

    /* ================= STATE VARIABLES ================= */

    // ============== Structs ==============
    struct Addresses {
        address recoveryAddress;
        address collectionOwnerAddress;
        address authorisationAddress;
        address purchaseTokenAddress;
        address managerPrimaryRoyaltyAddress;
        address customerPrimaryRoyaltyAddress;
        address secondaryRoyaltyAddress;
    }

    struct TokenInfo {
        uint256[] prices;
        uint256[] supplies;
        uint256[] totalSupplies;
        uint256[] maxPerTransactions;
    }

    // ========= Immutable Storage =========
    uint256 internal constant BASIS_POINTS = 10000;

    // ========== Mutable Storage ==========
    string public constant version = '2.0.0';

    /// @dev token info
    string public name;
    string public symbol;
    uint256[] public prices;
    uint256[] public supplies;
    uint256[] public totalSupplies;
    uint256[] public maxPerTransactions;

    /// @dev metadata info
    string public contractURI;

    /// @dev toggle for api mints
    bool public allowBuy;

    /// @dev sale dates
    uint256 public publicSaleDate;
    uint256 public saleCloseDate;

    /// @dev royalty fees
    uint256 public primaryRoyaltyFee;
    uint256 public secondaryRoyaltyFee;

    Addresses public addresses;

    /* =================== CONSTRUCTOR =================== */
    /// @notice Creates a new NFT contract
    /// @param _name token name
    /// @param _symbol token symbol
    /// @param _contractMetadataURI contract metadata uri
    /// @param _allowBuy toggle to enable/disable buying
    /// @param _addresses a collection of addresses
    constructor(
        string memory _name,
        string memory _symbol,
        string memory _contractMetadataURI,
        string memory _tokenMetadataURI,
        bool _allowBuy,
        Addresses memory _addresses
    ) ERC1155('') {
        _transferOwnership(_addresses.collectionOwnerAddress);

        name = _name;
        symbol = _symbol;
        allowBuy = _allowBuy;
        _setURI(_tokenMetadataURI);
        contractURI = _contractMetadataURI;
        addresses = _addresses;
    }

    /* ====================== Views ====================== */
    function getTokenInfo() external view returns (TokenInfo memory tokenInfo) {
        tokenInfo = TokenInfo(
            prices,
            supplies,
            totalSupplies,
            maxPerTransactions
        );
    }

    function totalSupply(uint256 _tokenId)
        public
        view
        returns (uint256 _totalSupply)
    {
        _totalSupply = totalSupplies[_tokenId];
    }

    function royaltyInfo(uint256 _tokenId, uint256 _salePrice)
        external
        view
        returns (address royaltyAddress, uint256 royaltyAmount)
    {
        /// @dev secondary royalty to be paid out by the marketplace
        ///      to the splitter contract
        royaltyAddress = addresses.secondaryRoyaltyAddress;
        royaltyAmount = (_salePrice * secondaryRoyaltyFee) / BASIS_POINTS;
    }

    function supportsInterface(bytes4 _interfaceId)
        public
        view
        virtual
        override(ERC1155)
        returns (bool result)
    {
        result = (_interfaceId == type(IERC2981).interfaceId ||
            super.supportsInterface(_interfaceId));
    }

    /* ================ MUTATIVE FUNCTIONS ================ */

    // ============ Restricted =============

    function setNameAndSymbol(
        string calldata _newName,
        string calldata _newSymbol
    ) external onlyContractManager {
        name = _newName;
        symbol = _newSymbol;
    }

    function setMetadataURIs(
        string calldata _contractURI,
        string calldata _tokenURI
    ) external onlyContractManager {
        contractURI = _contractURI;
        _setURI(_tokenURI);
    }

    function setDates(uint256 _publicSale, uint256 _saleClosed)
        external
        onlyContractManager
    {
        publicSaleDate = _publicSale;
        saleCloseDate = _saleClosed;
    }

    function setTokenData(
        uint256 _id,
        uint256 _price,
        uint256 _supply,
        uint256 _maxPerAddress
    ) external onlyContractManager {
        if (supplies[_id] > _supply) revert NewSupplyTooLow();

        prices[_id] = _price;
        totalSupplies[_id] = _supply;
        maxPerTransactions[_id] = _maxPerAddress;
    }

    function setAddresses(Addresses calldata _addresses)
        external
        onlyContractManager
    {
        if (_addresses.recoveryAddress != addresses.recoveryAddress)
            revert ImmutableRecoveryAddress();

        if (
            addresses.collectionOwnerAddress !=
            _addresses.collectionOwnerAddress
        ) {
            _transferOwnership(_addresses.collectionOwnerAddress);
        }

        addresses = _addresses;
    }

    function setAllowBuy(bool _allowBuy) external onlyContractManager {
        allowBuy = _allowBuy;
    }

    function addTokens(
        uint256[] calldata _newSupplies,
        uint256[] calldata _newPrices,
        uint256[] calldata _maxPerTransactions
    ) external onlyContractManager arrayLengthMatch(_newSupplies, _newPrices) {
        uint256 suppliesLength = _newSupplies.length;

        if (suppliesLength != _newPrices.length) revert ArrayLengthMismatch();

        for (uint256 i = 0; i < suppliesLength; ) {
            totalSupplies.push(_newSupplies[i]);
            supplies.push(0);
            prices.push(_newPrices[i]);
            maxPerTransactions.push(_maxPerTransactions[i]);

            unchecked {
                ++i;
            }
        }
    }

    function setRoyalty(uint256 _primaryFee, uint256 _secondaryFee)
        external
        onlyContractManager
    {
        primaryRoyaltyFee = _primaryFee;
        secondaryRoyaltyFee = _secondaryFee;
    }

    // ============== Minting ==============
    function mintBatch(
        address[] calldata _to,
        uint256[][] calldata _ids,
        uint256[][] calldata _amounts
    ) external onlyContractManager nonContract {
        uint256 toLength = _to.length;
        for (uint256 i = 0; i < toLength; ) {
            uint256 idsLength = _ids[i].length;
            for (uint256 j = 0; j < idsLength; ) {
                uint256 _supply = supplies[_ids[i][j]];
                if (_supply + _amounts[i][j] > totalSupplies[_ids[i][j]])
                    revert MaxSupplyExceeded();
                /// @dev remove overflow protection enabled by default
                ///      as supplies is already capped by totalSupplies
                unchecked {
                    _supply += _amounts[i][j];
                }
                /// @dev write back to storage
                supplies[_ids[i][j]] = _supply;
                unchecked {
                    ++j;
                }
            }

            _mintBatch(_to[i], _ids[i], _amounts[i], '0x');
            unchecked {
                ++i;
            }
        }
    }

    // ================ Buy ================
    function buyAuthorised(
        uint256 _id,
        uint256 _amount,
        uint256 _totalPrice,
        uint256 _maxPerAddress,
        uint256 _expires,
        bytes calldata _signature
    ) external payable buyAllowed nonContract {
        if (block.timestamp >= _expires) revert SignatureExpired();

        bytes32 hash = keccak256(
            abi.encodePacked(
                address(this),
                msg.sender,
                _amount,
                _totalPrice,
                _maxPerAddress,
                _expires,
                _id
            )
        );

        bytes32 message = ECDSA.toEthSignedMessageHash(hash);

        if (
            ECDSA.recover(message, _signature) != addresses.authorisationAddress
        ) revert NotAuthorised();

        _buy(_id, _amount, _totalPrice);
    }

    function buy(uint256 _id, uint256 _amount)
        external
        payable
        buyAllowed
        nonContract
    {
        if (publicSaleDate == 0 || block.timestamp < publicSaleDate) revert PublicSaleClosed();

        uint256 totalPrice = prices[_id] * _amount;
        _buy(_id, _amount, totalPrice);
    }

    function _buy(
        uint256 _id,
        uint256 _amount,
        uint256 _totalPrice
    ) internal {
        uint256 _supply = supplies[_id];

        if (saleCloseDate != 0) {
            if (block.timestamp >= saleCloseDate) revert SaleClosed();
        }
        if (_supply + _amount > totalSupplies[_id]) revert MaxSupplyExceeded();

        if (maxPerTransactions[_id] != 0) {
            if (_amount > maxPerTransactions[_id])
                revert MaxPerTransactionsExceeded();
        }

        uint256 royaltyAmount = (_totalPrice * primaryRoyaltyFee) /
            BASIS_POINTS;

        if (addresses.purchaseTokenAddress != address(0)) {
            IERC20 token = IERC20(addresses.purchaseTokenAddress);
            /// @dev primary royalty cut for Hypermint
            token.safeTransferFrom(
                msg.sender,
                addresses.managerPrimaryRoyaltyAddress,
                royaltyAmount
            );
            /// @dev primary sale (i.e. minting revenue) for customer (or its payees)
            token.safeTransferFrom(
                msg.sender,
                addresses.customerPrimaryRoyaltyAddress,
                _totalPrice - royaltyAmount
            );
        } else {
            if (msg.value < _totalPrice) revert InsufficientPaymentValue();
            /// @dev primary royalty cut for Hypermint
            payable(addresses.managerPrimaryRoyaltyAddress).transfer(
                royaltyAmount
            );
            /// @dev primary sale (i.e. minting revenue) for customer (or its payees)
            payable(addresses.customerPrimaryRoyaltyAddress).transfer(
                _totalPrice - royaltyAmount
            );
        }

        /// @dev remove overflow protection enabled by default
        ///      as supply is already capped by totalSupply
        unchecked {
            _supply += _amount;
        }

        /// @dev write back to storage
        supplies[_id] = _supply;

        _mint(msg.sender, _id, _amount, '0x');
    }

    // ============= Ownership=============
    function recoverContract() external {
        if (msg.sender != addresses.recoveryAddress) revert NotAuthorised();
        _transferContractManager(addresses.recoveryAddress);
    }

    /* ==================== MODIFIERS ===================== */
    modifier buyAllowed() {
        if (!allowBuy) revert BuyDisabled();
        _;
    }

    modifier arrayLengthMatch(
        uint256[] calldata arr1,
        uint256[] calldata arr2
    ) {
        if (arr1.length != arr2.length) revert ArrayLengthMismatch();
        _;
    }

    /// @dev this eliminates the possibility of being called
    ///      from a contract
    modifier nonContract() {
        if (tx.origin != msg.sender) revert ContractCallBlocked();
        _;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (interfaces/IERC2981.sol)

pragma solidity ^0.8.0;

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

/**
 * @dev Interface for the NFT Royalty Standard.
 *
 * A standardized way to retrieve royalty payment information for non-fungible tokens (NFTs) to enable universal
 * support for royalty payments across all NFT marketplaces and ecosystem participants.
 *
 * _Available since v4.5._
 */
interface IERC2981 is IERC165 {
    /**
     * @dev Returns how much royalty is owed and to whom, based on a sale price that may be denominated in any unit of
     * exchange. The royalty amount is denominated and should be paid in that same unit of exchange.
     */
    function royaltyInfo(uint256 tokenId, uint256 salePrice)
        external
        view
        returns (address receiver, uint256 royaltyAmount);
}

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

pragma solidity ^0.8.0;

import "../token/ERC20/IERC20.sol";

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC1155/extensions/ERC1155Burnable.sol)

pragma solidity ^0.8.0;

import "../ERC1155.sol";

/**
 * @dev Extension of {ERC1155} that allows token holders to destroy both their
 * own tokens and those that they have been approved to use.
 *
 * _Available since v3.1._
 */
abstract contract ERC1155Burnable is ERC1155 {
    function burn(
        address account,
        uint256 id,
        uint256 value
    ) public virtual {
        require(
            account == _msgSender() || isApprovedForAll(account, _msgSender()),
            "ERC1155: caller is not owner nor approved"
        );

        _burn(account, id, value);
    }

    function burnBatch(
        address account,
        uint256[] memory ids,
        uint256[] memory values
    ) public virtual {
        require(
            account == _msgSender() || isApprovedForAll(account, _msgSender()),
            "ERC1155: caller is not owner nor approved"
        );

        _burnBatch(account, ids, values);
    }
}

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

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../../../utils/Address.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using Address for address;

    function safeTransfer(
        IERC20 token,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(
        IERC20 token,
        address from,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        require(
            (value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    function safeIncreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender) + value;
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            uint256 newAllowance = oldAllowance - value;
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
        }
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        if (returndata.length > 0) {
            // Return data is optional
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/cryptography/ECDSA.sol)

pragma solidity ^0.8.0;

import "../Strings.sol";

/**
 * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
 *
 * These functions can be used to verify that a message was signed by the holder
 * of the private keys of a given address.
 */
library ECDSA {
    enum RecoverError {
        NoError,
        InvalidSignature,
        InvalidSignatureLength,
        InvalidSignatureS,
        InvalidSignatureV
    }

    function _throwError(RecoverError error) private pure {
        if (error == RecoverError.NoError) {
            return; // no error: do nothing
        } else if (error == RecoverError.InvalidSignature) {
            revert("ECDSA: invalid signature");
        } else if (error == RecoverError.InvalidSignatureLength) {
            revert("ECDSA: invalid signature length");
        } else if (error == RecoverError.InvalidSignatureS) {
            revert("ECDSA: invalid signature 's' value");
        } else if (error == RecoverError.InvalidSignatureV) {
            revert("ECDSA: invalid signature 'v' value");
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature` or error string. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     *
     * Documentation for signature generation:
     * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
     * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
     *
     * _Available since v4.3._
     */
    function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {
        // Check the signature length
        // - case 65: r,s,v signature (standard)
        // - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._
        if (signature.length == 65) {
            bytes32 r;
            bytes32 s;
            uint8 v;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            assembly {
                r := mload(add(signature, 0x20))
                s := mload(add(signature, 0x40))
                v := byte(0, mload(add(signature, 0x60)))
            }
            return tryRecover(hash, v, r, s);
        } else if (signature.length == 64) {
            bytes32 r;
            bytes32 vs;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            assembly {
                r := mload(add(signature, 0x20))
                vs := mload(add(signature, 0x40))
            }
            return tryRecover(hash, r, vs);
        } else {
            return (address(0), RecoverError.InvalidSignatureLength);
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature`. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     */
    function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, signature);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
     *
     * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
     *
     * _Available since v4.3._
     */
    function tryRecover(
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal pure returns (address, RecoverError) {
        bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);
        uint8 v = uint8((uint256(vs) >> 255) + 27);
        return tryRecover(hash, v, r, s);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
     *
     * _Available since v4.2._
     */
    function recover(
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, r, vs);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `v`,
     * `r` and `s` signature fields separately.
     *
     * _Available since v4.3._
     */
    function tryRecover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address, RecoverError) {
        // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
        // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
        // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
        // signatures from current libraries generate a unique signature with an s-value in the lower half order.
        //
        // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
        // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
        // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
        // these malleable signatures as well.
        if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
            return (address(0), RecoverError.InvalidSignatureS);
        }
        if (v != 27 && v != 28) {
            return (address(0), RecoverError.InvalidSignatureV);
        }

        // If the signature is valid (and not malleable), return the signer address
        address signer = ecrecover(hash, v, r, s);
        if (signer == address(0)) {
            return (address(0), RecoverError.InvalidSignature);
        }

        return (signer, RecoverError.NoError);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `v`,
     * `r` and `s` signature fields separately.
     */
    function recover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, v, r, s);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from a `hash`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
        // 32 is the length in bytes of hash,
        // enforced by the type signature above
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from `s`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s));
    }

    /**
     * @dev Returns an Ethereum Signed Typed Data, created from a
     * `domainSeparator` and a `structHash`. This produces hash corresponding
     * to the one signed with the
     * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
     * JSON-RPC method as part of EIP-712.
     *
     * See {recover}.
     */
    function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)

pragma solidity ^0.8.4;

import '@openzeppelin/contracts/utils/Context.sol';

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

    event ContractManagerTransferred(
        address indexed previousContractManager,
        address indexed newContractManager
    );

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferContractManager(msg.sender);
    }

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

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), 'Ownable: caller is not the owner');
        _;
    }

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

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(
            newOwner != address(0),
            'Ownable: new owner is the zero address'
        );
        _transferOwnership(newOwner);
    }

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

    /**
     * @dev Returns the manager of the contract
     */
    function contractManager() public view virtual returns (address) {
        return _contractManager;
    }

    /**
     * @dev Throws if called by any account other than the Contract Manager.
     */
    modifier onlyContractManager() {
        require(
            _msgSender() == _contractManager,
            'Ownable: caller is not the contract manager'
        );
        _;
    }

    /**
     * @dev Transfers manager of the contract to a new account (`newContractManager`).
     * Can only be called by the current _contractManager.
     */
    function transferContractManager(address newContractManager)
        public
        virtual
        onlyContractManager
    {
        require(
            newContractManager != address(0),
            'Ownable: new contract owner is the zero address'
        );
        _transferContractManager(newContractManager);
    }

    /**
     * @dev Transfers management of the contract to a new account (`newContractManager`).
     * Internal function without access restriction.
     */
    function _transferContractManager(address newContractManager)
        internal
        virtual
    {
        address oldContractManager = _contractManager;
        _contractManager = newContractManager;

        emit ContractManagerTransferred(oldContractManager, newContractManager);
    }
}

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

pragma solidity ^0.8.0;

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (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 v4.6.0) (token/ERC1155/ERC1155.sol)

pragma solidity ^0.8.0;

import "./IERC1155.sol";
import "./IERC1155Receiver.sol";
import "./extensions/IERC1155MetadataURI.sol";
import "../../utils/Address.sol";
import "../../utils/Context.sol";
import "../../utils/introspection/ERC165.sol";

/**
 * @dev Implementation of the basic standard multi-token.
 * See https://eips.ethereum.org/EIPS/eip-1155
 * Originally based on code by Enjin: https://github.com/enjin/erc-1155
 *
 * _Available since v3.1._
 */
contract ERC1155 is Context, ERC165, IERC1155, IERC1155MetadataURI {
    using Address for address;

    // Mapping from token ID to account balances
    mapping(uint256 => mapping(address => uint256)) private _balances;

    // Mapping from account to operator approvals
    mapping(address => mapping(address => bool)) private _operatorApprovals;

    // Used as the URI for all token types by relying on ID substitution, e.g. https://token-cdn-domain/{id}.json
    string private _uri;

    /**
     * @dev See {_setURI}.
     */
    constructor(string memory uri_) {
        _setURI(uri_);
    }

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
        return
            interfaceId == type(IERC1155).interfaceId ||
            interfaceId == type(IERC1155MetadataURI).interfaceId ||
            super.supportsInterface(interfaceId);
    }

    /**
     * @dev See {IERC1155MetadataURI-uri}.
     *
     * This implementation returns the same URI for *all* token types. It relies
     * on the token type ID substitution mechanism
     * https://eips.ethereum.org/EIPS/eip-1155#metadata[defined in the EIP].
     *
     * Clients calling this function must replace the `\{id\}` substring with the
     * actual token type ID.
     */
    function uri(uint256) public view virtual override returns (string memory) {
        return _uri;
    }

    /**
     * @dev See {IERC1155-balanceOf}.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function balanceOf(address account, uint256 id) public view virtual override returns (uint256) {
        require(account != address(0), "ERC1155: balance query for the zero address");
        return _balances[id][account];
    }

    /**
     * @dev See {IERC1155-balanceOfBatch}.
     *
     * Requirements:
     *
     * - `accounts` and `ids` must have the same length.
     */
    function balanceOfBatch(address[] memory accounts, uint256[] memory ids)
        public
        view
        virtual
        override
        returns (uint256[] memory)
    {
        require(accounts.length == ids.length, "ERC1155: accounts and ids length mismatch");

        uint256[] memory batchBalances = new uint256[](accounts.length);

        for (uint256 i = 0; i < accounts.length; ++i) {
            batchBalances[i] = balanceOf(accounts[i], ids[i]);
        }

        return batchBalances;
    }

    /**
     * @dev See {IERC1155-setApprovalForAll}.
     */
    function setApprovalForAll(address operator, bool approved) public virtual override {
        _setApprovalForAll(_msgSender(), operator, approved);
    }

    /**
     * @dev See {IERC1155-isApprovedForAll}.
     */
    function isApprovedForAll(address account, address operator) public view virtual override returns (bool) {
        return _operatorApprovals[account][operator];
    }

    /**
     * @dev See {IERC1155-safeTransferFrom}.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 id,
        uint256 amount,
        bytes memory data
    ) public virtual override {
        require(
            from == _msgSender() || isApprovedForAll(from, _msgSender()),
            "ERC1155: caller is not owner nor approved"
        );
        _safeTransferFrom(from, to, id, amount, data);
    }

    /**
     * @dev See {IERC1155-safeBatchTransferFrom}.
     */
    function safeBatchTransferFrom(
        address from,
        address to,
        uint256[] memory ids,
        uint256[] memory amounts,
        bytes memory data
    ) public virtual override {
        require(
            from == _msgSender() || isApprovedForAll(from, _msgSender()),
            "ERC1155: transfer caller is not owner nor approved"
        );
        _safeBatchTransferFrom(from, to, ids, amounts, data);
    }

    /**
     * @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
     *
     * Emits a {TransferSingle} event.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - `from` must have a balance of tokens of type `id` of at least `amount`.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
     * acceptance magic value.
     */
    function _safeTransferFrom(
        address from,
        address to,
        uint256 id,
        uint256 amount,
        bytes memory data
    ) internal virtual {
        require(to != address(0), "ERC1155: transfer to the zero address");

        address operator = _msgSender();
        uint256[] memory ids = _asSingletonArray(id);
        uint256[] memory amounts = _asSingletonArray(amount);

        _beforeTokenTransfer(operator, from, to, ids, amounts, data);

        uint256 fromBalance = _balances[id][from];
        require(fromBalance >= amount, "ERC1155: insufficient balance for transfer");
        unchecked {
            _balances[id][from] = fromBalance - amount;
        }
        _balances[id][to] += amount;

        emit TransferSingle(operator, from, to, id, amount);

        _afterTokenTransfer(operator, from, to, ids, amounts, data);

        _doSafeTransferAcceptanceCheck(operator, from, to, id, amount, data);
    }

    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_safeTransferFrom}.
     *
     * Emits a {TransferBatch} event.
     *
     * Requirements:
     *
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
     * acceptance magic value.
     */
    function _safeBatchTransferFrom(
        address from,
        address to,
        uint256[] memory ids,
        uint256[] memory amounts,
        bytes memory data
    ) internal virtual {
        require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");
        require(to != address(0), "ERC1155: transfer to the zero address");

        address operator = _msgSender();

        _beforeTokenTransfer(operator, from, to, ids, amounts, data);

        for (uint256 i = 0; i < ids.length; ++i) {
            uint256 id = ids[i];
            uint256 amount = amounts[i];

            uint256 fromBalance = _balances[id][from];
            require(fromBalance >= amount, "ERC1155: insufficient balance for transfer");
            unchecked {
                _balances[id][from] = fromBalance - amount;
            }
            _balances[id][to] += amount;
        }

        emit TransferBatch(operator, from, to, ids, amounts);

        _afterTokenTransfer(operator, from, to, ids, amounts, data);

        _doSafeBatchTransferAcceptanceCheck(operator, from, to, ids, amounts, data);
    }

    /**
     * @dev Sets a new URI for all token types, by relying on the token type ID
     * substitution mechanism
     * https://eips.ethereum.org/EIPS/eip-1155#metadata[defined in the EIP].
     *
     * By this mechanism, any occurrence of the `\{id\}` substring in either the
     * URI or any of the amounts in the JSON file at said URI will be replaced by
     * clients with the token type ID.
     *
     * For example, the `https://token-cdn-domain/\{id\}.json` URI would be
     * interpreted by clients as
     * `https://token-cdn-domain/000000000000000000000000000000000000000000000000000000000004cce0.json`
     * for token type ID 0x4cce0.
     *
     * See {uri}.
     *
     * Because these URIs cannot be meaningfully represented by the {URI} event,
     * this function emits no events.
     */
    function _setURI(string memory newuri) internal virtual {
        _uri = newuri;
    }

    /**
     * @dev Creates `amount` tokens of token type `id`, and assigns them to `to`.
     *
     * Emits a {TransferSingle} event.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
     * acceptance magic value.
     */
    function _mint(
        address to,
        uint256 id,
        uint256 amount,
        bytes memory data
    ) internal virtual {
        require(to != address(0), "ERC1155: mint to the zero address");

        address operator = _msgSender();
        uint256[] memory ids = _asSingletonArray(id);
        uint256[] memory amounts = _asSingletonArray(amount);

        _beforeTokenTransfer(operator, address(0), to, ids, amounts, data);

        _balances[id][to] += amount;
        emit TransferSingle(operator, address(0), to, id, amount);

        _afterTokenTransfer(operator, address(0), to, ids, amounts, data);

        _doSafeTransferAcceptanceCheck(operator, address(0), to, id, amount, data);
    }

    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_mint}.
     *
     * Requirements:
     *
     * - `ids` and `amounts` must have the same length.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
     * acceptance magic value.
     */
    function _mintBatch(
        address to,
        uint256[] memory ids,
        uint256[] memory amounts,
        bytes memory data
    ) internal virtual {
        require(to != address(0), "ERC1155: mint to the zero address");
        require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");

        address operator = _msgSender();

        _beforeTokenTransfer(operator, address(0), to, ids, amounts, data);

        for (uint256 i = 0; i < ids.length; i++) {
            _balances[ids[i]][to] += amounts[i];
        }

        emit TransferBatch(operator, address(0), to, ids, amounts);

        _afterTokenTransfer(operator, address(0), to, ids, amounts, data);

        _doSafeBatchTransferAcceptanceCheck(operator, address(0), to, ids, amounts, data);
    }

    /**
     * @dev Destroys `amount` tokens of token type `id` from `from`
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `from` must have at least `amount` tokens of token type `id`.
     */
    function _burn(
        address from,
        uint256 id,
        uint256 amount
    ) internal virtual {
        require(from != address(0), "ERC1155: burn from the zero address");

        address operator = _msgSender();
        uint256[] memory ids = _asSingletonArray(id);
        uint256[] memory amounts = _asSingletonArray(amount);

        _beforeTokenTransfer(operator, from, address(0), ids, amounts, "");

        uint256 fromBalance = _balances[id][from];
        require(fromBalance >= amount, "ERC1155: burn amount exceeds balance");
        unchecked {
            _balances[id][from] = fromBalance - amount;
        }

        emit TransferSingle(operator, from, address(0), id, amount);

        _afterTokenTransfer(operator, from, address(0), ids, amounts, "");
    }

    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_burn}.
     *
     * Requirements:
     *
     * - `ids` and `amounts` must have the same length.
     */
    function _burnBatch(
        address from,
        uint256[] memory ids,
        uint256[] memory amounts
    ) internal virtual {
        require(from != address(0), "ERC1155: burn from the zero address");
        require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");

        address operator = _msgSender();

        _beforeTokenTransfer(operator, from, address(0), ids, amounts, "");

        for (uint256 i = 0; i < ids.length; i++) {
            uint256 id = ids[i];
            uint256 amount = amounts[i];

            uint256 fromBalance = _balances[id][from];
            require(fromBalance >= amount, "ERC1155: burn amount exceeds balance");
            unchecked {
                _balances[id][from] = fromBalance - amount;
            }
        }

        emit TransferBatch(operator, from, address(0), ids, amounts);

        _afterTokenTransfer(operator, from, address(0), ids, amounts, "");
    }

    /**
     * @dev Approve `operator` to operate on all of `owner` tokens
     *
     * Emits a {ApprovalForAll} event.
     */
    function _setApprovalForAll(
        address owner,
        address operator,
        bool approved
    ) internal virtual {
        require(owner != operator, "ERC1155: setting approval status for self");
        _operatorApprovals[owner][operator] = approved;
        emit ApprovalForAll(owner, operator, approved);
    }

    /**
     * @dev Hook that is called before any token transfer. This includes minting
     * and burning, as well as batched variants.
     *
     * The same hook is called on both single and batched variants. For single
     * transfers, the length of the `id` and `amount` arrays will be 1.
     *
     * Calling conditions (for each `id` and `amount` pair):
     *
     * - When `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * of token type `id` will be  transferred to `to`.
     * - When `from` is zero, `amount` tokens of token type `id` will be minted
     * for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens of token type `id`
     * will be burned.
     * - `from` and `to` are never both zero.
     * - `ids` and `amounts` have the same, non-zero length.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(
        address operator,
        address from,
        address to,
        uint256[] memory ids,
        uint256[] memory amounts,
        bytes memory data
    ) internal virtual {}

    /**
     * @dev Hook that is called after any token transfer. This includes minting
     * and burning, as well as batched variants.
     *
     * The same hook is called on both single and batched variants. For single
     * transfers, the length of the `id` and `amount` arrays will be 1.
     *
     * Calling conditions (for each `id` and `amount` pair):
     *
     * - When `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * of token type `id` will be  transferred to `to`.
     * - When `from` is zero, `amount` tokens of token type `id` will be minted
     * for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens of token type `id`
     * will be burned.
     * - `from` and `to` are never both zero.
     * - `ids` and `amounts` have the same, non-zero length.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _afterTokenTransfer(
        address operator,
        address from,
        address to,
        uint256[] memory ids,
        uint256[] memory amounts,
        bytes memory data
    ) internal virtual {}

    function _doSafeTransferAcceptanceCheck(
        address operator,
        address from,
        address to,
        uint256 id,
        uint256 amount,
        bytes memory data
    ) private {
        if (to.isContract()) {
            try IERC1155Receiver(to).onERC1155Received(operator, from, id, amount, data) returns (bytes4 response) {
                if (response != IERC1155Receiver.onERC1155Received.selector) {
                    revert("ERC1155: ERC1155Receiver rejected tokens");
                }
            } catch Error(string memory reason) {
                revert(reason);
            } catch {
                revert("ERC1155: transfer to non ERC1155Receiver implementer");
            }
        }
    }

    function _doSafeBatchTransferAcceptanceCheck(
        address operator,
        address from,
        address to,
        uint256[] memory ids,
        uint256[] memory amounts,
        bytes memory data
    ) private {
        if (to.isContract()) {
            try IERC1155Receiver(to).onERC1155BatchReceived(operator, from, ids, amounts, data) returns (
                bytes4 response
            ) {
                if (response != IERC1155Receiver.onERC1155BatchReceived.selector) {
                    revert("ERC1155: ERC1155Receiver rejected tokens");
                }
            } catch Error(string memory reason) {
                revert(reason);
            } catch {
                revert("ERC1155: transfer to non ERC1155Receiver implementer");
            }
        }
    }

    function _asSingletonArray(uint256 element) private pure returns (uint256[] memory) {
        uint256[] memory array = new uint256[](1);
        array[0] = element;

        return array;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC1155/IERC1155.sol)

pragma solidity ^0.8.0;

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

/**
 * @dev Required interface of an ERC1155 compliant contract, as defined in the
 * https://eips.ethereum.org/EIPS/eip-1155[EIP].
 *
 * _Available since v3.1._
 */
interface IERC1155 is IERC165 {
    /**
     * @dev Emitted when `value` tokens of token type `id` are transferred from `from` to `to` by `operator`.
     */
    event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value);

    /**
     * @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all
     * transfers.
     */
    event TransferBatch(
        address indexed operator,
        address indexed from,
        address indexed to,
        uint256[] ids,
        uint256[] values
    );

    /**
     * @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to
     * `approved`.
     */
    event ApprovalForAll(address indexed account, address indexed operator, bool approved);

    /**
     * @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI.
     *
     * If an {URI} event was emitted for `id`, the standard
     * https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value
     * returned by {IERC1155MetadataURI-uri}.
     */
    event URI(string value, uint256 indexed id);

    /**
     * @dev Returns the amount of tokens of token type `id` owned by `account`.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function balanceOf(address account, uint256 id) external view returns (uint256);

    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}.
     *
     * Requirements:
     *
     * - `accounts` and `ids` must have the same length.
     */
    function balanceOfBatch(address[] calldata accounts, uint256[] calldata ids)
        external
        view
        returns (uint256[] memory);

    /**
     * @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`,
     *
     * Emits an {ApprovalForAll} event.
     *
     * Requirements:
     *
     * - `operator` cannot be the caller.
     */
    function setApprovalForAll(address operator, bool approved) external;

    /**
     * @dev Returns true if `operator` is approved to transfer ``account``'s tokens.
     *
     * See {setApprovalForAll}.
     */
    function isApprovedForAll(address account, address operator) external view returns (bool);

    /**
     * @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
     *
     * Emits a {TransferSingle} event.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - If the caller is not `from`, it must be have been approved to spend ``from``'s tokens via {setApprovalForAll}.
     * - `from` must have a balance of tokens of type `id` of at least `amount`.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
     * acceptance magic value.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 id,
        uint256 amount,
        bytes calldata data
    ) external;

    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}.
     *
     * Emits a {TransferBatch} event.
     *
     * Requirements:
     *
     * - `ids` and `amounts` must have the same length.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
     * acceptance magic value.
     */
    function safeBatchTransferFrom(
        address from,
        address to,
        uint256[] calldata ids,
        uint256[] calldata amounts,
        bytes calldata data
    ) external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC1155/IERC1155Receiver.sol)

pragma solidity ^0.8.0;

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

/**
 * @dev _Available since v3.1._
 */
interface IERC1155Receiver is IERC165 {
    /**
     * @dev Handles the receipt of a single ERC1155 token type. This function is
     * called at the end of a `safeTransferFrom` after the balance has been updated.
     *
     * NOTE: To accept the transfer, this must return
     * `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`
     * (i.e. 0xf23a6e61, or its own function selector).
     *
     * @param operator The address which initiated the transfer (i.e. msg.sender)
     * @param from The address which previously owned the token
     * @param id The ID of the token being transferred
     * @param value The amount of tokens being transferred
     * @param data Additional data with no specified format
     * @return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))` if transfer is allowed
     */
    function onERC1155Received(
        address operator,
        address from,
        uint256 id,
        uint256 value,
        bytes calldata data
    ) external returns (bytes4);

    /**
     * @dev Handles the receipt of a multiple ERC1155 token types. This function
     * is called at the end of a `safeBatchTransferFrom` after the balances have
     * been updated.
     *
     * NOTE: To accept the transfer(s), this must return
     * `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))`
     * (i.e. 0xbc197c81, or its own function selector).
     *
     * @param operator The address which initiated the batch transfer (i.e. msg.sender)
     * @param from The address which previously owned the token
     * @param ids An array containing ids of each token being transferred (order and length must match values array)
     * @param values An array containing amounts of each token being transferred (order and length must match ids array)
     * @param data Additional data with no specified format
     * @return `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))` if transfer is allowed
     */
    function onERC1155BatchReceived(
        address operator,
        address from,
        uint256[] calldata ids,
        uint256[] calldata values,
        bytes calldata data
    ) external returns (bytes4);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC1155/extensions/IERC1155MetadataURI.sol)

pragma solidity ^0.8.0;

import "../IERC1155.sol";

/**
 * @dev Interface of the optional ERC1155MetadataExtension interface, as defined
 * in the https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[EIP].
 *
 * _Available since v3.1._
 */
interface IERC1155MetadataURI is IERC1155 {
    /**
     * @dev Returns the URI for token type `id`.
     *
     * If the `\{id\}` substring is present in the URI, it must be replaced by
     * clients with the actual token type ID.
     */
    function uri(uint256 id) external view returns (string memory);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

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

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

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

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

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

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

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

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

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

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

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

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

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

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

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

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

pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)

pragma solidity ^0.8.0;

import "./IERC165.sol";

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

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

pragma solidity ^0.8.0;

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        // Inspired by OraclizeAPI's implementation - MIT licence
        // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol

        if (value == 0) {
            return "0";
        }
        uint256 temp = value;
        uint256 digits;
        while (temp != 0) {
            digits++;
            temp /= 10;
        }
        bytes memory buffer = new bytes(digits);
        while (value != 0) {
            digits -= 1;
            buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
            value /= 10;
        }
        return string(buffer);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        if (value == 0) {
            return "0x00";
        }
        uint256 temp = value;
        uint256 length = 0;
        while (temp != 0) {
            length++;
            temp >>= 8;
        }
        return toHexString(value, length);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
     */
    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = _HEX_SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }
}

// SPDX-License-Identifier: MIT
// ERC721A Contracts v4.2.0
// Creator: Chiru Labs

pragma solidity ^0.8.4;

import './IERC721ABurnable.sol';
import '../ERC721A.sol';

/**
 * @title ERC721ABurnable.
 *
 * @dev ERC721A token that can be irreversibly burned (destroyed).
 */
abstract contract ERC721ABurnable is ERC721A, IERC721ABurnable {
    /**
     * @dev Burns `tokenId`. See {ERC721A-_burn}.
     *
     * Requirements:
     *
     * - The caller must own `tokenId` or be an approved operator.
     */
    function burn(uint256 tokenId) public virtual override {
        _burn(tokenId, true);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

import {IOperatorFilterRegistry} from './IOperatorFilterRegistry.sol';

abstract contract OperatorFilterer {
    error OperatorNotAllowed(address operator);

    IOperatorFilterRegistry constant operatorFilterRegistry =
        IOperatorFilterRegistry(0x000000000000AAeB6D7670E522A718067333cd4E);

    constructor(address subscriptionOrRegistrantToCopy, bool subscribe) {
        // If an inheriting token contract is deployed to a network without the registry deployed, the modifier
        // will not revert, but the contract will need to be registered with the registry once it is deployed in
        // order for the modifier to filter addresses.
        if (address(operatorFilterRegistry).code.length > 0) {
            if (subscribe) {
                operatorFilterRegistry.registerAndSubscribe(
                    address(this),
                    subscriptionOrRegistrantToCopy
                );
            } else {
                if (subscriptionOrRegistrantToCopy != address(0)) {
                    operatorFilterRegistry.registerAndCopyEntries(
                        address(this),
                        subscriptionOrRegistrantToCopy
                    );
                } else {
                    operatorFilterRegistry.register(address(this));
                }
            }
        }
    }

    modifier onlyAllowedOperator(address from, bool switchedOn) virtual {
        // return back out if toggle is off
        if (!switchedOn) {
            _;
            return;
        }

        // Check registry code length to facilitate testing in environments without a deployed registry.
        if (address(operatorFilterRegistry).code.length > 0) {
            // Allow spending tokens from addresses with balance
            // Note that this still allows listings and marketplaces with escrow to transfer tokens if transferred
            // from an EOA.
            if (from == msg.sender) {
                _;
                return;
            }
            if (
                !(operatorFilterRegistry.isOperatorAllowed(
                    address(this),
                    msg.sender
                ) &&
                    operatorFilterRegistry.isOperatorAllowed(
                        address(this),
                        from
                    ))
            ) {
                revert OperatorNotAllowed(msg.sender);
            }
        }
        _;
    }
}

// SPDX-License-Identifier: MIT
// ERC721A Contracts v4.2.0
// Creator: Chiru Labs

pragma solidity ^0.8.4;

import '../IERC721A.sol';

/**
 * @dev Interface of ERC721ABurnable.
 */
interface IERC721ABurnable is IERC721A {
    /**
     * @dev Burns `tokenId`. See {ERC721A-_burn}.
     *
     * Requirements:
     *
     * - The caller must own `tokenId` or be an approved operator.
     */
    function burn(uint256 tokenId) external;
}

// SPDX-License-Identifier: MIT
// ERC721A Contracts v4.2.0
// Creator: Chiru Labs

pragma solidity ^0.8.4;

import './IERC721A.sol';

/**
 * @dev Interface of ERC721 token receiver.
 */
interface ERC721A__IERC721Receiver {
    function onERC721Received(
        address operator,
        address from,
        uint256 tokenId,
        bytes calldata data
    ) external returns (bytes4);
}

/**
 * @title ERC721A
 *
 * @dev Implementation of the [ERC721](https://eips.ethereum.org/EIPS/eip-721)
 * Non-Fungible Token Standard, including the Metadata extension.
 * Optimized for lower gas during batch mints.
 *
 * Token IDs are minted in sequential order (e.g. 0, 1, 2, 3, ...)
 * starting from `_startTokenId()`.
 *
 * Assumptions:
 *
 * - An owner cannot have more than 2**64 - 1 (max value of uint64) of supply.
 * - The maximum token ID cannot exceed 2**256 - 1 (max value of uint256).
 */
contract ERC721A is IERC721A {
    // Reference type for token approval.
    struct TokenApprovalRef {
        address value;
    }

    // =============================================================
    //                           CONSTANTS
    // =============================================================

    // Mask of an entry in packed address data.
    uint256 private constant _BITMASK_ADDRESS_DATA_ENTRY = (1 << 64) - 1;

    // The bit position of `numberMinted` in packed address data.
    uint256 private constant _BITPOS_NUMBER_MINTED = 64;

    // The bit position of `numberBurned` in packed address data.
    uint256 private constant _BITPOS_NUMBER_BURNED = 128;

    // The bit position of `aux` in packed address data.
    uint256 private constant _BITPOS_AUX = 192;

    // Mask of all 256 bits in packed address data except the 64 bits for `aux`.
    uint256 private constant _BITMASK_AUX_COMPLEMENT = (1 << 192) - 1;

    // The bit position of `startTimestamp` in packed ownership.
    uint256 private constant _BITPOS_START_TIMESTAMP = 160;

    // The bit mask of the `burned` bit in packed ownership.
    uint256 private constant _BITMASK_BURNED = 1 << 224;

    // The bit position of the `nextInitialized` bit in packed ownership.
    uint256 private constant _BITPOS_NEXT_INITIALIZED = 225;

    // The bit mask of the `nextInitialized` bit in packed ownership.
    uint256 private constant _BITMASK_NEXT_INITIALIZED = 1 << 225;

    // The bit position of `extraData` in packed ownership.
    uint256 private constant _BITPOS_EXTRA_DATA = 232;

    // Mask of all 256 bits in a packed ownership except the 24 bits for `extraData`.
    uint256 private constant _BITMASK_EXTRA_DATA_COMPLEMENT = (1 << 232) - 1;

    // The mask of the lower 160 bits for addresses.
    uint256 private constant _BITMASK_ADDRESS = (1 << 160) - 1;

    // The maximum `quantity` that can be minted with {_mintERC2309}.
    // This limit is to prevent overflows on the address data entries.
    // For a limit of 5000, a total of 3.689e15 calls to {_mintERC2309}
    // is required to cause an overflow, which is unrealistic.
    uint256 private constant _MAX_MINT_ERC2309_QUANTITY_LIMIT = 5000;

    // The `Transfer` event signature is given by:
    // `keccak256(bytes("Transfer(address,address,uint256)"))`.
    bytes32 private constant _TRANSFER_EVENT_SIGNATURE =
        0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef;

    // =============================================================
    //                            STORAGE
    // =============================================================

    // The next token ID to be minted.
    uint256 private _currentIndex;

    // The number of tokens burned.
    uint256 private _burnCounter;

    // Token name
    string private _name;

    // Token symbol
    string private _symbol;

    // Mapping from token ID to ownership details
    // An empty struct value does not necessarily mean the token is unowned.
    // See {_packedOwnershipOf} implementation for details.
    //
    // Bits Layout:
    // - [0..159]   `addr`
    // - [160..223] `startTimestamp`
    // - [224]      `burned`
    // - [225]      `nextInitialized`
    // - [232..255] `extraData`
    mapping(uint256 => uint256) private _packedOwnerships;

    // Mapping owner address to address data.
    //
    // Bits Layout:
    // - [0..63]    `balance`
    // - [64..127]  `numberMinted`
    // - [128..191] `numberBurned`
    // - [192..255] `aux`
    mapping(address => uint256) private _packedAddressData;

    // Mapping from token ID to approved address.
    mapping(uint256 => TokenApprovalRef) private _tokenApprovals;

    // Mapping from owner to operator approvals
    mapping(address => mapping(address => bool)) private _operatorApprovals;

    // =============================================================
    //                          CONSTRUCTOR
    // =============================================================

    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
        _currentIndex = _startTokenId();
    }

    // =============================================================
    //                   TOKEN COUNTING OPERATIONS
    // =============================================================

    /**
     * @dev Returns the starting token ID.
     * To change the starting token ID, please override this function.
     */
    function _startTokenId() internal view virtual returns (uint256) {
        return 0;
    }

    /**
     * @dev Returns the next token ID to be minted.
     */
    function _nextTokenId() internal view virtual returns (uint256) {
        return _currentIndex;
    }

    /**
     * @dev Returns the total number of tokens in existence.
     * Burned tokens will reduce the count.
     * To get the total number of tokens minted, please see {_totalMinted}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        // Counter underflow is impossible as _burnCounter cannot be incremented
        // more than `_currentIndex - _startTokenId()` times.
        unchecked {
            return _currentIndex - _burnCounter - _startTokenId();
        }
    }

    /**
     * @dev Returns the total amount of tokens minted in the contract.
     */
    function _totalMinted() internal view virtual returns (uint256) {
        // Counter underflow is impossible as `_currentIndex` does not decrement,
        // and it is initialized to `_startTokenId()`.
        unchecked {
            return _currentIndex - _startTokenId();
        }
    }

    /**
     * @dev Returns the total number of tokens burned.
     */
    function _totalBurned() internal view virtual returns (uint256) {
        return _burnCounter;
    }

    // =============================================================
    //                    ADDRESS DATA OPERATIONS
    // =============================================================

    /**
     * @dev Returns the number of tokens in `owner`'s account.
     */
    function balanceOf(address owner) public view virtual override returns (uint256) {
        if (owner == address(0)) revert BalanceQueryForZeroAddress();
        return _packedAddressData[owner] & _BITMASK_ADDRESS_DATA_ENTRY;
    }

    /**
     * Returns the number of tokens minted by `owner`.
     */
    function _numberMinted(address owner) internal view returns (uint256) {
        return (_packedAddressData[owner] >> _BITPOS_NUMBER_MINTED) & _BITMASK_ADDRESS_DATA_ENTRY;
    }

    /**
     * Returns the number of tokens burned by or on behalf of `owner`.
     */
    function _numberBurned(address owner) internal view returns (uint256) {
        return (_packedAddressData[owner] >> _BITPOS_NUMBER_BURNED) & _BITMASK_ADDRESS_DATA_ENTRY;
    }

    /**
     * Returns the auxiliary data for `owner`. (e.g. number of whitelist mint slots used).
     */
    function _getAux(address owner) internal view returns (uint64) {
        return uint64(_packedAddressData[owner] >> _BITPOS_AUX);
    }

    /**
     * Sets the auxiliary data for `owner`. (e.g. number of whitelist mint slots used).
     * If there are multiple variables, please pack them into a uint64.
     */
    function _setAux(address owner, uint64 aux) internal virtual {
        uint256 packed = _packedAddressData[owner];
        uint256 auxCasted;
        // Cast `aux` with assembly to avoid redundant masking.
        assembly {
            auxCasted := aux
        }
        packed = (packed & _BITMASK_AUX_COMPLEMENT) | (auxCasted << _BITPOS_AUX);
        _packedAddressData[owner] = packed;
    }

    // =============================================================
    //                            IERC165
    // =============================================================

    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * [EIP section](https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified)
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30000 gas.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        // The interface IDs are constants representing the first 4 bytes
        // of the XOR of all function selectors in the interface.
        // See: [ERC165](https://eips.ethereum.org/EIPS/eip-165)
        // (e.g. `bytes4(i.functionA.selector ^ i.functionB.selector ^ ...)`)
        return
            interfaceId == 0x01ffc9a7 || // ERC165 interface ID for ERC165.
            interfaceId == 0x80ac58cd || // ERC165 interface ID for ERC721.
            interfaceId == 0x5b5e139f; // ERC165 interface ID for ERC721Metadata.
    }

    // =============================================================
    //                        IERC721Metadata
    // =============================================================

    /**
     * @dev Returns the token collection name.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the token collection symbol.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
     */
    function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
        if (!_exists(tokenId)) revert URIQueryForNonexistentToken();

        string memory baseURI = _baseURI();
        return bytes(baseURI).length != 0 ? string(abi.encodePacked(baseURI, _toString(tokenId))) : '';
    }

    /**
     * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
     * token will be the concatenation of the `baseURI` and the `tokenId`. Empty
     * by default, it can be overridden in child contracts.
     */
    function _baseURI() internal view virtual returns (string memory) {
        return '';
    }

    // =============================================================
    //                     OWNERSHIPS OPERATIONS
    // =============================================================

    /**
     * @dev Returns the owner of the `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function ownerOf(uint256 tokenId) public view virtual override returns (address) {
        return address(uint160(_packedOwnershipOf(tokenId)));
    }

    /**
     * @dev Gas spent here starts off proportional to the maximum mint batch size.
     * It gradually moves to O(1) as tokens get transferred around over time.
     */
    function _ownershipOf(uint256 tokenId) internal view virtual returns (TokenOwnership memory) {
        return _unpackedOwnership(_packedOwnershipOf(tokenId));
    }

    /**
     * @dev Returns the unpacked `TokenOwnership` struct at `index`.
     */
    function _ownershipAt(uint256 index) internal view virtual returns (TokenOwnership memory) {
        return _unpackedOwnership(_packedOwnerships[index]);
    }

    /**
     * @dev Initializes the ownership slot minted at `index` for efficiency purposes.
     */
    function _initializeOwnershipAt(uint256 index) internal virtual {
        if (_packedOwnerships[index] == 0) {
            _packedOwnerships[index] = _packedOwnershipOf(index);
        }
    }

    /**
     * Returns the packed ownership data of `tokenId`.
     */
    function _packedOwnershipOf(uint256 tokenId) private view returns (uint256) {
        uint256 curr = tokenId;

        unchecked {
            if (_startTokenId() <= curr)
                if (curr < _currentIndex) {
                    uint256 packed = _packedOwnerships[curr];
                    // If not burned.
                    if (packed & _BITMASK_BURNED == 0) {
                        // Invariant:
                        // There will always be an initialized ownership slot
                        // (i.e. `ownership.addr != address(0) && ownership.burned == false`)
                        // before an unintialized ownership slot
                        // (i.e. `ownership.addr == address(0) && ownership.burned == false`)
                        // Hence, `curr` will not underflow.
                        //
                        // We can directly compare the packed value.
                        // If the address is zero, packed will be zero.
                        while (packed == 0) {
                            packed = _packedOwnerships[--curr];
                        }
                        return packed;
                    }
                }
        }
        revert OwnerQueryForNonexistentToken();
    }

    /**
     * @dev Returns the unpacked `TokenOwnership` struct from `packed`.
     */
    function _unpackedOwnership(uint256 packed) private pure returns (TokenOwnership memory ownership) {
        ownership.addr = address(uint160(packed));
        ownership.startTimestamp = uint64(packed >> _BITPOS_START_TIMESTAMP);
        ownership.burned = packed & _BITMASK_BURNED != 0;
        ownership.extraData = uint24(packed >> _BITPOS_EXTRA_DATA);
    }

    /**
     * @dev Packs ownership data into a single uint256.
     */
    function _packOwnershipData(address owner, uint256 flags) private view returns (uint256 result) {
        assembly {
            // Mask `owner` to the lower 160 bits, in case the upper bits somehow aren't clean.
            owner := and(owner, _BITMASK_ADDRESS)
            // `owner | (block.timestamp << _BITPOS_START_TIMESTAMP) | flags`.
            result := or(owner, or(shl(_BITPOS_START_TIMESTAMP, timestamp()), flags))
        }
    }

    /**
     * @dev Returns the `nextInitialized` flag set if `quantity` equals 1.
     */
    function _nextInitializedFlag(uint256 quantity) private pure returns (uint256 result) {
        // For branchless setting of the `nextInitialized` flag.
        assembly {
            // `(quantity == 1) << _BITPOS_NEXT_INITIALIZED`.
            result := shl(_BITPOS_NEXT_INITIALIZED, eq(quantity, 1))
        }
    }

    // =============================================================
    //                      APPROVAL OPERATIONS
    // =============================================================

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

        if (_msgSenderERC721A() != owner)
            if (!isApprovedForAll(owner, _msgSenderERC721A())) {
                revert ApprovalCallerNotOwnerNorApproved();
            }

        _tokenApprovals[tokenId].value = to;
        emit Approval(owner, to, tokenId);
    }

    /**
     * @dev Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) public view virtual override returns (address) {
        if (!_exists(tokenId)) revert ApprovalQueryForNonexistentToken();

        return _tokenApprovals[tokenId].value;
    }

    /**
     * @dev Approve or remove `operator` as an operator for the caller.
     * Operators can call {transferFrom} or {safeTransferFrom}
     * for any token owned by the caller.
     *
     * Requirements:
     *
     * - The `operator` cannot be the caller.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool approved) public virtual override {
        if (operator == _msgSenderERC721A()) revert ApproveToCaller();

        _operatorApprovals[_msgSenderERC721A()][operator] = approved;
        emit ApprovalForAll(_msgSenderERC721A(), operator, approved);
    }

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

    /**
     * @dev Returns whether `tokenId` exists.
     *
     * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
     *
     * Tokens start existing when they are minted. See {_mint}.
     */
    function _exists(uint256 tokenId) internal view virtual returns (bool) {
        return
            _startTokenId() <= tokenId &&
            tokenId < _currentIndex && // If within bounds,
            _packedOwnerships[tokenId] & _BITMASK_BURNED == 0; // and not burned.
    }

    /**
     * @dev Returns whether `msgSender` is equal to `approvedAddress` or `owner`.
     */
    function _isSenderApprovedOrOwner(
        address approvedAddress,
        address owner,
        address msgSender
    ) private pure returns (bool result) {
        assembly {
            // Mask `owner` to the lower 160 bits, in case the upper bits somehow aren't clean.
            owner := and(owner, _BITMASK_ADDRESS)
            // Mask `msgSender` to the lower 160 bits, in case the upper bits somehow aren't clean.
            msgSender := and(msgSender, _BITMASK_ADDRESS)
            // `msgSender == owner || msgSender == approvedAddress`.
            result := or(eq(msgSender, owner), eq(msgSender, approvedAddress))
        }
    }

    /**
     * @dev Returns the storage slot and value for the approved address of `tokenId`.
     */
    function _getApprovedSlotAndAddress(uint256 tokenId)
        private
        view
        returns (uint256 approvedAddressSlot, address approvedAddress)
    {
        TokenApprovalRef storage tokenApproval = _tokenApprovals[tokenId];
        // The following is equivalent to `approvedAddress = _tokenApprovals[tokenId]`.
        assembly {
            approvedAddressSlot := tokenApproval.slot
            approvedAddress := sload(approvedAddressSlot)
        }
    }

    // =============================================================
    //                      TRANSFER OPERATIONS
    // =============================================================

    /**
     * @dev Transfers `tokenId` from `from` to `to`.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token
     * by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) public virtual override {
        uint256 prevOwnershipPacked = _packedOwnershipOf(tokenId);

        if (address(uint160(prevOwnershipPacked)) != from) revert TransferFromIncorrectOwner();

        (uint256 approvedAddressSlot, address approvedAddress) = _getApprovedSlotAndAddress(tokenId);

        // The nested ifs save around 20+ gas over a compound boolean condition.
        if (!_isSenderApprovedOrOwner(approvedAddress, from, _msgSenderERC721A()))
            if (!isApprovedForAll(from, _msgSenderERC721A())) revert TransferCallerNotOwnerNorApproved();

        if (to == address(0)) revert TransferToZeroAddress();

        _beforeTokenTransfers(from, to, tokenId, 1);

        // Clear approvals from the previous owner.
        assembly {
            if approvedAddress {
                // This is equivalent to `delete _tokenApprovals[tokenId]`.
                sstore(approvedAddressSlot, 0)
            }
        }

        // Underflow of the sender's balance is impossible because we check for
        // ownership above and the recipient's balance can't realistically overflow.
        // Counter overflow is incredibly unrealistic as `tokenId` would have to be 2**256.
        unchecked {
            // We can directly increment and decrement the balances.
            --_packedAddressData[from]; // Updates: `balance -= 1`.
            ++_packedAddressData[to]; // Updates: `balance += 1`.

            // Updates:
            // - `address` to the next owner.
            // - `startTimestamp` to the timestamp of transfering.
            // - `burned` to `false`.
            // - `nextInitialized` to `true`.
            _packedOwnerships[tokenId] = _packOwnershipData(
                to,
                _BITMASK_NEXT_INITIALIZED | _nextExtraData(from, to, prevOwnershipPacked)
            );

            // If the next slot may not have been initialized (i.e. `nextInitialized == false`) .
            if (prevOwnershipPacked & _BITMASK_NEXT_INITIALIZED == 0) {
                uint256 nextTokenId = tokenId + 1;
                // If the next slot's address is zero and not burned (i.e. packed value is zero).
                if (_packedOwnerships[nextTokenId] == 0) {
                    // If the next slot is within bounds.
                    if (nextTokenId != _currentIndex) {
                        // Initialize the next slot to maintain correctness for `ownerOf(tokenId + 1)`.
                        _packedOwnerships[nextTokenId] = prevOwnershipPacked;
                    }
                }
            }
        }

        emit Transfer(from, to, tokenId);
        _afterTokenTransfers(from, to, tokenId, 1);
    }

    /**
     * @dev Equivalent to `safeTransferFrom(from, to, tokenId, '')`.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) public virtual override {
        safeTransferFrom(from, to, tokenId, '');
    }

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token
     * by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement
     * {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) public virtual override {
        transferFrom(from, to, tokenId);
        if (to.code.length != 0)
            if (!_checkContractOnERC721Received(from, to, tokenId, _data)) {
                revert TransferToNonERC721ReceiverImplementer();
            }
    }

    /**
     * @dev Hook that is called before a set of serially-ordered token IDs
     * are about to be transferred. This includes minting.
     * And also called before burning one token.
     *
     * `startTokenId` - the first token ID to be transferred.
     * `quantity` - the amount to be transferred.
     *
     * Calling conditions:
     *
     * - When `from` and `to` are both non-zero, `from`'s `tokenId` will be
     * transferred to `to`.
     * - When `from` is zero, `tokenId` will be minted for `to`.
     * - When `to` is zero, `tokenId` will be burned by `from`.
     * - `from` and `to` are never both zero.
     */
    function _beforeTokenTransfers(
        address from,
        address to,
        uint256 startTokenId,
        uint256 quantity
    ) internal virtual {}

    /**
     * @dev Hook that is called after a set of serially-ordered token IDs
     * have been transferred. This includes minting.
     * And also called after one token has been burned.
     *
     * `startTokenId` - the first token ID to be transferred.
     * `quantity` - the amount to be transferred.
     *
     * Calling conditions:
     *
     * - When `from` and `to` are both non-zero, `from`'s `tokenId` has been
     * transferred to `to`.
     * - When `from` is zero, `tokenId` has been minted for `to`.
     * - When `to` is zero, `tokenId` has been burned by `from`.
     * - `from` and `to` are never both zero.
     */
    function _afterTokenTransfers(
        address from,
        address to,
        uint256 startTokenId,
        uint256 quantity
    ) internal virtual {}

    /**
     * @dev Private function to invoke {IERC721Receiver-onERC721Received} on a target contract.
     *
     * `from` - Previous owner of the given token ID.
     * `to` - Target address that will receive the token.
     * `tokenId` - Token ID to be transferred.
     * `_data` - Optional data to send along with the call.
     *
     * Returns whether the call correctly returned the expected magic value.
     */
    function _checkContractOnERC721Received(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) private returns (bool) {
        try ERC721A__IERC721Receiver(to).onERC721Received(_msgSenderERC721A(), from, tokenId, _data) returns (
            bytes4 retval
        ) {
            return retval == ERC721A__IERC721Receiver(to).onERC721Received.selector;
        } catch (bytes memory reason) {
            if (reason.length == 0) {
                revert TransferToNonERC721ReceiverImplementer();
            } else {
                assembly {
                    revert(add(32, reason), mload(reason))
                }
            }
        }
    }

    // =============================================================
    //                        MINT OPERATIONS
    // =============================================================

    /**
     * @dev Mints `quantity` tokens and transfers them to `to`.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - `quantity` must be greater than 0.
     *
     * Emits a {Transfer} event for each mint.
     */
    function _mint(address to, uint256 quantity) internal virtual {
        uint256 startTokenId = _currentIndex;
        if (quantity == 0) revert MintZeroQuantity();

        _beforeTokenTransfers(address(0), to, startTokenId, quantity);

        // Overflows are incredibly unrealistic.
        // `balance` and `numberMinted` have a maximum limit of 2**64.
        // `tokenId` has a maximum limit of 2**256.
        unchecked {
            // Updates:
            // - `balance += quantity`.
            // - `numberMinted += quantity`.
            //
            // We can directly add to the `balance` and `numberMinted`.
            _packedAddressData[to] += quantity * ((1 << _BITPOS_NUMBER_MINTED) | 1);

            // Updates:
            // - `address` to the owner.
            // - `startTimestamp` to the timestamp of minting.
            // - `burned` to `false`.
            // - `nextInitialized` to `quantity == 1`.
            _packedOwnerships[startTokenId] = _packOwnershipData(
                to,
                _nextInitializedFlag(quantity) | _nextExtraData(address(0), to, 0)
            );

            uint256 toMasked;
            uint256 end = startTokenId + quantity;

            // Use assembly to loop and emit the `Transfer` event for gas savings.
            assembly {
                // Mask `to` to the lower 160 bits, in case the upper bits somehow aren't clean.
                toMasked := and(to, _BITMASK_ADDRESS)
                // Emit the `Transfer` event.
                log4(
                    0, // Start of data (0, since no data).
                    0, // End of data (0, since no data).
                    _TRANSFER_EVENT_SIGNATURE, // Signature.
                    0, // `address(0)`.
                    toMasked, // `to`.
                    startTokenId // `tokenId`.
                )

                for {
                    let tokenId := add(startTokenId, 1)
                } iszero(eq(tokenId, end)) {
                    tokenId := add(tokenId, 1)
                } {
                    // Emit the `Transfer` event. Similar to above.
                    log4(0, 0, _TRANSFER_EVENT_SIGNATURE, 0, toMasked, tokenId)
                }
            }
            if (toMasked == 0) revert MintToZeroAddress();

            _currentIndex = end;
        }
        _afterTokenTransfers(address(0), to, startTokenId, quantity);
    }

    /**
     * @dev Mints `quantity` tokens and transfers them to `to`.
     *
     * This function is intended for efficient minting only during contract creation.
     *
     * It emits only one {ConsecutiveTransfer} as defined in
     * [ERC2309](https://eips.ethereum.org/EIPS/eip-2309),
     * instead of a sequence of {Transfer} event(s).
     *
     * Calling this function outside of contract creation WILL make your contract
     * non-compliant with the ERC721 standard.
     * For full ERC721 compliance, substituting ERC721 {Transfer} event(s) with the ERC2309
     * {ConsecutiveTransfer} event is only permissible during contract creation.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - `quantity` must be greater than 0.
     *
     * Emits a {ConsecutiveTransfer} event.
     */
    function _mintERC2309(address to, uint256 quantity) internal virtual {
        uint256 startTokenId = _currentIndex;
        if (to == address(0)) revert MintToZeroAddress();
        if (quantity == 0) revert MintZeroQuantity();
        if (quantity > _MAX_MINT_ERC2309_QUANTITY_LIMIT) revert MintERC2309QuantityExceedsLimit();

        _beforeTokenTransfers(address(0), to, startTokenId, quantity);

        // Overflows are unrealistic due to the above check for `quantity` to be below the limit.
        unchecked {
            // Updates:
            // - `balance += quantity`.
            // - `numberMinted += quantity`.
            //
            // We can directly add to the `balance` and `numberMinted`.
            _packedAddressData[to] += quantity * ((1 << _BITPOS_NUMBER_MINTED) | 1);

            // Updates:
            // - `address` to the owner.
            // - `startTimestamp` to the timestamp of minting.
            // - `burned` to `false`.
            // - `nextInitialized` to `quantity == 1`.
            _packedOwnerships[startTokenId] = _packOwnershipData(
                to,
                _nextInitializedFlag(quantity) | _nextExtraData(address(0), to, 0)
            );

            emit ConsecutiveTransfer(startTokenId, startTokenId + quantity - 1, address(0), to);

            _currentIndex = startTokenId + quantity;
        }
        _afterTokenTransfers(address(0), to, startTokenId, quantity);
    }

    /**
     * @dev Safely mints `quantity` tokens and transfers them to `to`.
     *
     * Requirements:
     *
     * - If `to` refers to a smart contract, it must implement
     * {IERC721Receiver-onERC721Received}, which is called for each safe transfer.
     * - `quantity` must be greater than 0.
     *
     * See {_mint}.
     *
     * Emits a {Transfer} event for each mint.
     */
    function _safeMint(
        address to,
        uint256 quantity,
        bytes memory _data
    ) internal virtual {
        _mint(to, quantity);

        unchecked {
            if (to.code.length != 0) {
                uint256 end = _currentIndex;
                uint256 index = end - quantity;
                do {
                    if (!_checkContractOnERC721Received(address(0), to, index++, _data)) {
                        revert TransferToNonERC721ReceiverImplementer();
                    }
                } while (index < end);
                // Reentrancy protection.
                if (_currentIndex != end) revert();
            }
        }
    }

    /**
     * @dev Equivalent to `_safeMint(to, quantity, '')`.
     */
    function _safeMint(address to, uint256 quantity) internal virtual {
        _safeMint(to, quantity, '');
    }

    // =============================================================
    //                        BURN OPERATIONS
    // =============================================================

    /**
     * @dev Equivalent to `_burn(tokenId, false)`.
     */
    function _burn(uint256 tokenId) internal virtual {
        _burn(tokenId, false);
    }

    /**
     * @dev Destroys `tokenId`.
     * The approval is cleared when the token is burned.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     *
     * Emits a {Transfer} event.
     */
    function _burn(uint256 tokenId, bool approvalCheck) internal virtual {
        uint256 prevOwnershipPacked = _packedOwnershipOf(tokenId);

        address from = address(uint160(prevOwnershipPacked));

        (uint256 approvedAddressSlot, address approvedAddress) = _getApprovedSlotAndAddress(tokenId);

        if (approvalCheck) {
            // The nested ifs save around 20+ gas over a compound boolean condition.
            if (!_isSenderApprovedOrOwner(approvedAddress, from, _msgSenderERC721A()))
                if (!isApprovedForAll(from, _msgSenderERC721A())) revert TransferCallerNotOwnerNorApproved();
        }

        _beforeTokenTransfers(from, address(0), tokenId, 1);

        // Clear approvals from the previous owner.
        assembly {
            if approvedAddress {
                // This is equivalent to `delete _tokenApprovals[tokenId]`.
                sstore(approvedAddressSlot, 0)
            }
        }

        // Underflow of the sender's balance is impossible because we check for
        // ownership above and the recipient's balance can't realistically overflow.
        // Counter overflow is incredibly unrealistic as `tokenId` would have to be 2**256.
        unchecked {
            // Updates:
            // - `balance -= 1`.
            // - `numberBurned += 1`.
            //
            // We can directly decrement the balance, and increment the number burned.
            // This is equivalent to `packed -= 1; packed += 1 << _BITPOS_NUMBER_BURNED;`.
            _packedAddressData[from] += (1 << _BITPOS_NUMBER_BURNED) - 1;

            // Updates:
            // - `address` to the last owner.
            // - `startTimestamp` to the timestamp of burning.
            // - `burned` to `true`.
            // - `nextInitialized` to `true`.
            _packedOwnerships[tokenId] = _packOwnershipData(
                from,
                (_BITMASK_BURNED | _BITMASK_NEXT_INITIALIZED) | _nextExtraData(from, address(0), prevOwnershipPacked)
            );

            // If the next slot may not have been initialized (i.e. `nextInitialized == false`) .
            if (prevOwnershipPacked & _BITMASK_NEXT_INITIALIZED == 0) {
                uint256 nextTokenId = tokenId + 1;
                // If the next slot's address is zero and not burned (i.e. packed value is zero).
                if (_packedOwnerships[nextTokenId] == 0) {
                    // If the next slot is within bounds.
                    if (nextTokenId != _currentIndex) {
                        // Initialize the next slot to maintain correctness for `ownerOf(tokenId + 1)`.
                        _packedOwnerships[nextTokenId] = prevOwnershipPacked;
                    }
                }
            }
        }

        emit Transfer(from, address(0), tokenId);
        _afterTokenTransfers(from, address(0), tokenId, 1);

        // Overflow not possible, as _burnCounter cannot be exceed _currentIndex times.
        unchecked {
            _burnCounter++;
        }
    }

    // =============================================================
    //                     EXTRA DATA OPERATIONS
    // =============================================================

    /**
     * @dev Directly sets the extra data for the ownership data `index`.
     */
    function _setExtraDataAt(uint256 index, uint24 extraData) internal virtual {
        uint256 packed = _packedOwnerships[index];
        if (packed == 0) revert OwnershipNotInitializedForExtraData();
        uint256 extraDataCasted;
        // Cast `extraData` with assembly to avoid redundant masking.
        assembly {
            extraDataCasted := extraData
        }
        packed = (packed & _BITMASK_EXTRA_DATA_COMPLEMENT) | (extraDataCasted << _BITPOS_EXTRA_DATA);
        _packedOwnerships[index] = packed;
    }

    /**
     * @dev Called during each token transfer to set the 24bit `extraData` field.
     * Intended to be overridden by the cosumer contract.
     *
     * `previousExtraData` - the value of `extraData` before transfer.
     *
     * Calling conditions:
     *
     * - When `from` and `to` are both non-zero, `from`'s `tokenId` will be
     * transferred to `to`.
     * - When `from` is zero, `tokenId` will be minted for `to`.
     * - When `to` is zero, `tokenId` will be burned by `from`.
     * - `from` and `to` are never both zero.
     */
    function _extraData(
        address from,
        address to,
        uint24 previousExtraData
    ) internal view virtual returns (uint24) {}

    /**
     * @dev Returns the next extra data for the packed ownership data.
     * The returned result is shifted into position.
     */
    function _nextExtraData(
        address from,
        address to,
        uint256 prevOwnershipPacked
    ) private view returns (uint256) {
        uint24 extraData = uint24(prevOwnershipPacked >> _BITPOS_EXTRA_DATA);
        return uint256(_extraData(from, to, extraData)) << _BITPOS_EXTRA_DATA;
    }

    // =============================================================
    //                       OTHER OPERATIONS
    // =============================================================

    /**
     * @dev Returns the message sender (defaults to `msg.sender`).
     *
     * If you are writing GSN compatible contracts, you need to override this function.
     */
    function _msgSenderERC721A() internal view virtual returns (address) {
        return msg.sender;
    }

    /**
     * @dev Converts a uint256 to its ASCII string decimal representation.
     */
    function _toString(uint256 value) internal pure virtual returns (string memory ptr) {
        assembly {
            // The maximum value of a uint256 contains 78 digits (1 byte per digit),
            // but we allocate 128 bytes to keep the free memory pointer 32-byte word aliged.
            // We will need 1 32-byte word to store the length,
            // and 3 32-byte words to store a maximum of 78 digits. Total: 32 + 3 * 32 = 128.
            ptr := add(mload(0x40), 128)
            // Update the free memory pointer to allocate.
            mstore(0x40, ptr)

            // Cache the end of the memory to calculate the length later.
            let end := ptr

            // We write the string from the rightmost digit to the leftmost digit.
            // The following is essentially a do-while loop that also handles the zero case.
            // Costs a bit more than early returning for the zero case,
            // but cheaper in terms of deployment and overall runtime costs.
            for {
                // Initialize and perform the first pass without check.
                let temp := value
                // Move the pointer 1 byte leftwards to point to an empty character slot.
                ptr := sub(ptr, 1)
                // Write the character to the pointer.
                // The ASCII index of the '0' character is 48.
                mstore8(ptr, add(48, mod(temp, 10)))
                temp := div(temp, 10)
            } temp {
                // Keep dividing `temp` until zero.
                temp := div(temp, 10)
            } {
                // Body of the for loop.
                ptr := sub(ptr, 1)
                mstore8(ptr, add(48, mod(temp, 10)))
            }

            let length := sub(end, ptr)
            // Move the pointer 32 bytes leftwards to make room for the length.
            ptr := sub(ptr, 32)
            // Store the length.
            mstore(ptr, length)
        }
    }
}

// SPDX-License-Identifier: MIT
// ERC721A Contracts v4.2.0
// Creator: Chiru Labs

pragma solidity ^0.8.4;

/**
 * @dev Interface of ERC721A.
 */
interface IERC721A {
    /**
     * The caller must own the token or be an approved operator.
     */
    error ApprovalCallerNotOwnerNorApproved();

    /**
     * The token does not exist.
     */
    error ApprovalQueryForNonexistentToken();

    /**
     * The caller cannot approve to their own address.
     */
    error ApproveToCaller();

    /**
     * Cannot query the balance for the zero address.
     */
    error BalanceQueryForZeroAddress();

    /**
     * Cannot mint to the zero address.
     */
    error MintToZeroAddress();

    /**
     * The quantity of tokens minted must be more than zero.
     */
    error MintZeroQuantity();

    /**
     * The token does not exist.
     */
    error OwnerQueryForNonexistentToken();

    /**
     * The caller must own the token or be an approved operator.
     */
    error TransferCallerNotOwnerNorApproved();

    /**
     * The token must be owned by `from`.
     */
    error TransferFromIncorrectOwner();

    /**
     * Cannot safely transfer to a contract that does not implement the
     * ERC721Receiver interface.
     */
    error TransferToNonERC721ReceiverImplementer();

    /**
     * Cannot transfer to the zero address.
     */
    error TransferToZeroAddress();

    /**
     * The token does not exist.
     */
    error URIQueryForNonexistentToken();

    /**
     * The `quantity` minted with ERC2309 exceeds the safety limit.
     */
    error MintERC2309QuantityExceedsLimit();

    /**
     * The `extraData` cannot be set on an unintialized ownership slot.
     */
    error OwnershipNotInitializedForExtraData();

    // =============================================================
    //                            STRUCTS
    // =============================================================

    struct TokenOwnership {
        // The address of the owner.
        address addr;
        // Stores the start time of ownership with minimal overhead for tokenomics.
        uint64 startTimestamp;
        // Whether the token has been burned.
        bool burned;
        // Arbitrary data similar to `startTimestamp` that can be set via {_extraData}.
        uint24 extraData;
    }

    // =============================================================
    //                         TOKEN COUNTERS
    // =============================================================

    /**
     * @dev Returns the total number of tokens in existence.
     * Burned tokens will reduce the count.
     * To get the total number of tokens minted, please see {_totalMinted}.
     */
    function totalSupply() external view returns (uint256);

    // =============================================================
    //                            IERC165
    // =============================================================

    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * [EIP section](https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified)
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);

    // =============================================================
    //                            IERC721
    // =============================================================

    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

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

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

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

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

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

    /**
     * @dev Equivalent to `safeTransferFrom(from, to, tokenId, '')`.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

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

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

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

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

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

    // =============================================================
    //                        IERC721Metadata
    // =============================================================

    /**
     * @dev Returns the token collection name.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the token collection symbol.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
     */
    function tokenURI(uint256 tokenId) external view returns (string memory);

    // =============================================================
    //                           IERC2309
    // =============================================================

    /**
     * @dev Emitted when tokens in `fromTokenId` to `toTokenId`
     * (inclusive) is transferred from `from` to `to`, as defined in the
     * [ERC2309](https://eips.ethereum.org/EIPS/eip-2309) standard.
     *
     * See {_mintERC2309} for more details.
     */
    event ConsecutiveTransfer(uint256 indexed fromTokenId, uint256 toTokenId, address indexed from, address indexed to);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

interface IOperatorFilterRegistry {
    function isOperatorAllowed(address registrant, address operator)
        external
        view
        returns (bool);

    function register(address registrant) external;

    function registerAndSubscribe(address registrant, address subscription)
        external;

    function registerAndCopyEntries(
        address registrant,
        address registrantToCopy
    ) external;

    function updateOperator(
        address registrant,
        address operator,
        bool filtered
    ) external;

    function updateOperators(
        address registrant,
        address[] calldata operators,
        bool filtered
    ) external;

    function updateCodeHash(
        address registrant,
        bytes32 codehash,
        bool filtered
    ) external;

    function updateCodeHashes(
        address registrant,
        bytes32[] calldata codeHashes,
        bool filtered
    ) external;

    function subscribe(address registrant, address registrantToSubscribe)
        external;

    function unsubscribe(address registrant, bool copyExistingEntries) external;

    function subscriptionOf(address addr) external returns (address registrant);

    function subscribers(address registrant)
        external
        returns (address[] memory);

    function subscriberAt(address registrant, uint256 index)
        external
        returns (address);

    function copyEntriesOf(address registrant, address registrantToCopy)
        external;

    function isOperatorFiltered(address registrant, address operator)
        external
        returns (bool);

    function isCodeHashOfFiltered(address registrant, address operatorWithCode)
        external
        returns (bool);

    function isCodeHashFiltered(address registrant, bytes32 codeHash)
        external
        returns (bool);

    function filteredOperators(address addr)
        external
        returns (address[] memory);

    function filteredCodeHashes(address addr)
        external
        returns (bytes32[] memory);

    function filteredOperatorAt(address registrant, uint256 index)
        external
        returns (address);

    function filteredCodeHashAt(address registrant, uint256 index)
        external
        returns (bytes32);

    function isRegistered(address addr) external returns (bool);

    function codeHashOf(address addr) external returns (bytes32);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

import '@openzeppelin/contracts/interfaces/IERC2981.sol';
import '@openzeppelin/contracts/interfaces/IERC20.sol';
import '@openzeppelin/contracts/token/ERC1155/extensions/ERC1155Burnable.sol';
import '@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol';
import '@openzeppelin/contracts/utils/cryptography/ECDSA.sol';
import './opensea-operator-filter/OperatorFilterer.sol';
import './Ownable_1_0_0.sol';

contract HyperMintERC1155_2_2_0 is ERC1155Burnable, Ownable, OperatorFilterer {
    using SafeERC20 for IERC20;

    /* ================= CUSTOM ERRORS ================= */
    error NewSupplyTooLow();
    error ArrayLengthMismatch();
    error MaxSupplyExceeded();
    error SignatureExpired();
    error NotAuthorised();
    error BuyDisabled();
    error InsufficientPaymentValue();
    error PublicSaleClosed();
    error SaleClosed();
    error MaxPerTransactionsExceeded();
    error ContractCallBlocked();
    error ImmutableRecoveryAddress();
    error TransfersDisabled();

    /* ================= STATE VARIABLES ================= */

    // ============== Structs ==============
    struct GeneralConfig {
        string name;
        string symbol;
        string contractMetadataUrl;
        string tokenMetadataUrl;
        bool allowBuy;
        bool allowPublicTransfer;
        bool enableOpenSeaOperatorFilterRegistry;
        uint256 publicSaleDate;
        uint256 saleCloseDate;
        uint256 primaryRoyaltyFee;
        uint256 secondaryRoyaltyFee;
    }

    struct Addresses {
        address recoveryAddress;
        address collectionOwnerAddress;
        address authorisationAddress;
        address purchaseTokenAddress;
        address managerPrimaryRoyaltyAddress;
        address customerPrimaryRoyaltyAddress;
        address secondaryRoyaltyAddress;
    }

    struct TokenConfig {
        uint256 price;
        uint256 maxSupply;
        uint256 maxPerTransaction;
    }

    // ========= Immutable Storage =========
    uint256 internal constant BASIS_POINTS = 10000;

    // ========== Mutable Storage ==========
    string public constant version = '2.2.0';

    GeneralConfig public generalConfig;
    TokenConfig[] public tokenConfigs;
    Addresses public addresses;

    uint256[] public supplies;

    /* =================== CONSTRUCTOR =================== */
    /// @param _generalConfig settings for the contract
    /// @param _addresses a collection of addresses
    constructor(
        GeneralConfig memory _generalConfig,
        Addresses memory _addresses
    )
        ERC1155('')
        OperatorFilterer(
            address(0x3cc6CddA760b79bAfa08dF41ECFA224f810dCeB6), // default filter by OS
            true // subscribe to the filter list
        )
    {
        _transferOwnership(_addresses.collectionOwnerAddress);
        generalConfig = _generalConfig;
        addresses = _addresses;

        _setURI(generalConfig.tokenMetadataUrl);
    }

    /* ====================== Views ====================== */
    function name() public view returns (string memory collectionName) {
        collectionName = generalConfig.name;
    }

    function symbol() public view returns (string memory collectionSymbol) {
        collectionSymbol = generalConfig.symbol;
    }

    function contractURI() public view virtual returns (string memory uri) {
        uri = generalConfig.contractMetadataUrl;
    }

    function royaltyInfo(uint256 _tokenId, uint256 _salePrice)
        external
        view
        returns (address royaltyAddress, uint256 royaltyAmount)
    {
        /// @dev secondary royalty to be paid out by the marketplace
        ///      to the splitter contract
        royaltyAddress = addresses.secondaryRoyaltyAddress;
        royaltyAmount =
            (_salePrice * generalConfig.secondaryRoyaltyFee) /
            BASIS_POINTS;
    }

    function supportsInterface(bytes4 _interfaceId)
        public
        view
        virtual
        override(ERC1155)
        returns (bool result)
    {
        result = (_interfaceId == type(IERC2981).interfaceId ||
            super.supportsInterface(_interfaceId));
    }

    /* ================ MUTATIVE FUNCTIONS ================ */

    // ============ Restricted =============

    function setNameAndSymbol(
        string calldata _newName,
        string calldata _newSymbol
    ) external onlyContractManager {
        generalConfig.name = _newName;
        generalConfig.symbol = _newSymbol;
    }

    function setMetadataURIs(
        string calldata _contractURI,
        string calldata _tokenURI
    ) external onlyContractManager {
        generalConfig.contractMetadataUrl = _contractURI;
        generalConfig.tokenMetadataUrl = _tokenURI;
        _setURI(_tokenURI);
    }

    function setDates(uint256 _publicSale, uint256 _saleClosed)
        external
        onlyContractManager
    {
        generalConfig.publicSaleDate = _publicSale;
        generalConfig.saleCloseDate = _saleClosed;
    }

    function setTokenConfig(
        uint256 _id,
        uint256 _price,
        uint256 _maxSupply,
        uint256 _maxPerTransaction
    ) external onlyContractManager {
        if (supplies[_id] > _maxSupply) revert NewSupplyTooLow();

        tokenConfigs[_id].price = _price;
        tokenConfigs[_id].maxSupply = _maxSupply;
        tokenConfigs[_id].maxPerTransaction = _maxPerTransaction;
    }

    function setAddresses(Addresses calldata _addresses)
        external
        onlyContractManager
    {
        if (_addresses.recoveryAddress != addresses.recoveryAddress)
            revert ImmutableRecoveryAddress();

        if (
            addresses.collectionOwnerAddress !=
            _addresses.collectionOwnerAddress
        ) {
            _transferOwnership(_addresses.collectionOwnerAddress);
        }

        addresses = _addresses;
    }

    function setAllowBuy(bool _allowBuy) external onlyContractManager {
        generalConfig.allowBuy = _allowBuy;
    }

    function setAllowPublicTransfer(bool _allowPublicTransfer)
        external
        onlyContractManager
    {
        generalConfig.allowPublicTransfer = _allowPublicTransfer;
    }

    function setEnableOpenSeaOperatorFilterRegistry(bool _enable) external onlyContractManager {
        generalConfig.enableOpenSeaOperatorFilterRegistry = _enable;
    }

    function setRoyalty(uint256 _primaryFee, uint256 _secondaryFee)
        external
        onlyContractManager
    {
        generalConfig.primaryRoyaltyFee = _primaryFee;
        generalConfig.secondaryRoyaltyFee = _secondaryFee;
    }

    function addTokens(TokenConfig[] calldata _tokens)
        external
        onlyContractManager
    {
        for (uint256 i = 0; i < _tokens.length; ) {
            supplies.push(0);
            tokenConfigs.push(_tokens[i]);

            unchecked {
                ++i;
            }
        }
    }

    // ============== Minting ==============
    function mintBatch(
        address[] calldata _to,
        uint256[][] calldata _ids,
        uint256[][] calldata _amounts
    ) external onlyContractManager nonContract {
        uint256 toLength = _to.length;

        for (uint256 i = 0; i < toLength; ) {
            uint256 idsLength = _ids[i].length;

            for (uint256 j = 0; j < idsLength; ) {
                uint256 _supply = supplies[_ids[i][j]];

                if (
                    _supply + _amounts[i][j] >
                    tokenConfigs[_ids[i][j]].maxSupply
                ) revert MaxSupplyExceeded();

                /// @dev remove overflow protection enabled by default
                ///      as supplies is already capped by totalSupplies
                unchecked {
                    _supply += _amounts[i][j];
                }

                /// @dev write back to storage
                supplies[_ids[i][j]] = _supply;

                unchecked {
                    ++j;
                }
            }

            _mintBatch(_to[i], _ids[i], _amounts[i], '0x');

            unchecked {
                ++i;
            }
        }
    }

    // ================ Buy ================
    function buyAuthorised(
        uint256 _id,
        uint256 _amount,
        uint256 _totalPrice,
        uint256 _maxPerAddress,
        uint256 _expires,
        bytes calldata _signature
    ) external payable buyAllowed nonContract {
        if (block.timestamp >= _expires) revert SignatureExpired();

        bytes32 hash = keccak256(
            abi.encodePacked(
                address(this),
                msg.sender,
                _amount,
                _totalPrice,
                _maxPerAddress,
                _expires,
                _id
            )
        );

        bytes32 message = ECDSA.toEthSignedMessageHash(hash);

        if (
            ECDSA.recover(message, _signature) != addresses.authorisationAddress
        ) revert NotAuthorised();

        _buy(_id, _amount, _totalPrice);
    }

    function buy(uint256 _id, uint256 _amount)
        external
        payable
        buyAllowed
        nonContract
    {
        if (
            generalConfig.publicSaleDate == 0 ||
            block.timestamp < generalConfig.publicSaleDate
        ) revert PublicSaleClosed();

        uint256 totalPrice = tokenConfigs[_id].price * _amount;
        _buy(_id, _amount, totalPrice);
    }

    function _buy(
        uint256 _id,
        uint256 _amount,
        uint256 _totalPrice
    ) internal {
        if (generalConfig.saleCloseDate != 0) {
            if (block.timestamp >= generalConfig.saleCloseDate)
                revert SaleClosed();
        }

        uint256 _supply = supplies[_id];
        uint256 _maxSupply = tokenConfigs[_id].maxSupply;

        if (_supply + _amount > _maxSupply) revert MaxSupplyExceeded();

        uint256 _maxPerTransaction = tokenConfigs[_id].maxPerTransaction;
        if (_maxPerTransaction != 0) {
            if (_amount > _maxPerTransaction)
                revert MaxPerTransactionsExceeded();
        }

        uint256 royaltyAmount = (_totalPrice *
            generalConfig.primaryRoyaltyFee) / BASIS_POINTS;

        if (addresses.purchaseTokenAddress != address(0)) {
            IERC20 token = IERC20(addresses.purchaseTokenAddress);

            /// @dev primary royalty cut for Hypermint
            token.safeTransferFrom(
                msg.sender,
                addresses.managerPrimaryRoyaltyAddress,
                royaltyAmount
            );

            /// @dev primary sale (i.e. minting revenue) for customer (or its payees)
            token.safeTransferFrom(
                msg.sender,
                addresses.customerPrimaryRoyaltyAddress,
                _totalPrice - royaltyAmount
            );
        } else {
            if (msg.value < _totalPrice) revert InsufficientPaymentValue();

            /// @dev primary royalty cut for Hypermint
            payable(addresses.managerPrimaryRoyaltyAddress).transfer(
                royaltyAmount
            );

            /// @dev primary sale (i.e. minting revenue) for customer (or its payees)
            payable(addresses.customerPrimaryRoyaltyAddress).transfer(
                _totalPrice - royaltyAmount
            );
        }

        /// @dev remove overflow protection enabled by default
        ///      as supply is already capped by totalSupply
        unchecked {
            _supply += _amount;
        }

        /// @dev write back to storage
        supplies[_id] = _supply;

        _mint(msg.sender, _id, _amount, '0x');
    }

    // ================ Transfers ================
    function _beforeTokenTransfer(
        address operator,
        address from,
        address to,
        uint256[] memory ids,
        uint256[] memory amounts,
        bytes memory data
    )
        internal
        override(ERC1155)
        transferAllowed(from, to)
        onlyAllowedOperator(from, generalConfig.enableOpenSeaOperatorFilterRegistry)
    {
        super._beforeTokenTransfer(operator, from, to, ids, amounts, data);
    }

    function transferAuthorised(
        address _from,
        address _to,
        uint256 _tokenId,
        uint256 _amount,
        uint256 _expires,
        bytes calldata _signature
    ) external nonContract {
        if (block.timestamp >= _expires) revert SignatureExpired();

        bytes32 hash = keccak256(
            abi.encodePacked(
                address(this),
                msg.sender,
                _from,
                _to,
                _tokenId,
                _amount,
                _expires
            )
        );

        bytes32 message = ECDSA.toEthSignedMessageHash(hash);

        if (
            ECDSA.recover(message, _signature) != addresses.authorisationAddress
        ) revert NotAuthorised();

        super.safeTransferFrom(_from, _to, _tokenId, _amount, '0x');
    }

    // ============= Ownership=============
    function recoverContract() external {
        if (msg.sender != addresses.recoveryAddress) revert NotAuthorised();
        _transferContractManager(addresses.recoveryAddress);
    }

    /* ==================== MODIFIERS ===================== */
    modifier buyAllowed() {
        if (!generalConfig.allowBuy) revert BuyDisabled();
        _;
    }

    /// @dev this eliminates the possibility of being called
    ///      from a contract
    modifier nonContract() {
        if (tx.origin != msg.sender) revert ContractCallBlocked();
        _;
    }

    modifier transferAllowed(address from, address to) {
        bool isMinting = from == address(0);
        bool isBurning = to == address(0);
        bool isContractManager = from == this.contractManager();
        bool isTransferAuthorised = msg.sig == this.transferAuthorised.selector;

        if (
            !isMinting &&
            !isContractManager &&
            !isBurning &&
            !isTransferAuthorised
        ) {
            if (!generalConfig.allowPublicTransfer) revert TransfersDisabled();
        }
        _;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

import '@openzeppelin/contracts/interfaces/IERC2981.sol';
import '@openzeppelin/contracts/interfaces/IERC20.sol';
import '@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol';
import '@openzeppelin/contracts/utils/cryptography/ECDSA.sol';
import './Ownable_1_0_0.sol';
import 'erc721a/contracts/extensions/ERC721ABurnable.sol';

contract HyperMintERC721A_2_0_0 is ERC721ABurnable, Ownable {
    using SafeERC20 for IERC20;

    /* ================= CUSTOM ERRORS ================= */
    error NewSupplyTooLow();
    error MaxSupplyExceeded();
    error SignatureExpired();
    error NotAuthorised();
    error BuyDisabled();
    error InsufficientPaymentValue();
    error PublicSaleClosed();
    error SaleClosed();
    error MaxPerAddressExceeded();
    error MaxPerTransactionExceeded();
    error NonExistentToken();
    error ContractCallBlocked();
    error ImmutableRecoveryAddress();

    /* ================= STATE VARIABLES ================= */

    // ============== Structs ==============
    struct Addresses {
        address recoveryAddress;
        address collectionOwnerAddress;
        address authorisationAddress;
        address purchaseTokenAddress;
        address managerPrimaryRoyaltyAddress;
        address customerPrimaryRoyaltyAddress;
        address secondaryRoyaltyAddress;
    }

    struct TokenInfo {
        uint256 price;
        uint256 supply;
        uint256 maxSupply;
        uint256 maxPerTransaction;
    }

    // ========= Immutable Storage =========
    uint256 internal constant BASIS_POINTS = 10000;

    // ========== Mutable Storage ==========
    string public constant version = '2.0.0';

    /// @dev token info
    string _name;
    string _symbol;
    uint256 public price;
    uint256 public maxSupply;
    /// @dev only apply to public sale
    uint256 public maxPerTransaction;

    /// @dev metadata info
    string public contractURI;
    string public tokenMetadataURI;

    /// @dev toggle for api mints
    bool public allowBuy;

    /// @dev sale dates
    uint256 public publicSaleDate;
    uint256 public saleCloseDate;

    /// @dev royalty fees
    uint256 public primaryRoyaltyFee;
    uint256 public secondaryRoyaltyFee;

    Addresses public addresses;

    /* =================== CONSTRUCTOR =================== */
    /// @notice Creates a new NFT contract
    /// @param __name token name
    /// @param __symbol token symbol
    /// @param _price token price
    /// @param _maxSupply token max supply
    /// @param _allowBuy toggle to enable/disable buying
    /// @param _maxPerTransaction max amount an address can buy
    /// @param _addresses a collection of addresses
    constructor(
        string memory __name,
        string memory __symbol,
        uint256 _price,
        uint256 _maxSupply,
        string memory _contractMetadataURI,
        string memory _tokenMetadataURI,
        bool _allowBuy,
        uint256 _maxPerTransaction,
        Addresses memory _addresses
    ) ERC721A('', '') {
        _transferOwnership(_addresses.collectionOwnerAddress);

        _name = __name;
        _symbol = __symbol;
        price = _price;
        maxSupply = _maxSupply;
        allowBuy = _allowBuy;
        tokenMetadataURI = _tokenMetadataURI;
        contractURI = _contractMetadataURI;
        maxPerTransaction = _maxPerTransaction;
        addresses = _addresses;
    }

    /* ====================== Views ====================== */
    function name() public view override returns (string memory tokenName) {
        tokenName = _name;
    }

    function totalMinted(address addr) public view returns (uint256 numMinted) {
        numMinted = _numberMinted(addr);
    }

    function symbol() public view override returns (string memory tokenSymbol) {
        tokenSymbol = _symbol;
    }

    function tokenURI(uint256 _tokenId)
        public
        view
        virtual
        override
        returns (string memory uri)
    {
        if (!_exists(_tokenId)) revert NonExistentToken();
        uri = string(abi.encodePacked(tokenMetadataURI, _toString(_tokenId)));
    }

    function getTokenInfo() external view returns (TokenInfo memory tokenInfo) {
        tokenInfo = TokenInfo(
            price,
            totalSupply(),
            maxSupply,
            maxPerTransaction
        );
    }

    function royaltyInfo(uint256 _tokenId, uint256 _salePrice)
        external
        view
        returns (address royaltyAddress, uint256 royaltyAmount)
    {
        /// @dev secondary royalty to be paid out by the marketplace
        ///      to the splitter contract
        royaltyAddress = addresses.secondaryRoyaltyAddress;
        royaltyAmount = (_salePrice * secondaryRoyaltyFee) / BASIS_POINTS;
    }

    function supportsInterface(bytes4 _interfaceId)
        public
        view
        virtual
        override(ERC721A)
        returns (bool result)
    {
        result = (_interfaceId == type(IERC2981).interfaceId ||
            super.supportsInterface(_interfaceId));
    }

    /* ================ MUTATIVE FUNCTIONS ================ */

    // ============ Restricted =============
    function setNameAndSymbol(
        string calldata _newName,
        string calldata _newSymbol
    ) external onlyContractManager {
        _name = _newName;
        _symbol = _newSymbol;
    }

    function setMetadataURIs(
        string calldata _contractURI,
        string calldata _tokenURI
    ) external onlyContractManager {
        contractURI = _contractURI;
        tokenMetadataURI = _tokenURI;
    }

    function setDates(uint256 _publicSale, uint256 _saleClosed)
        external
        onlyContractManager
    {
        publicSaleDate = _publicSale;
        saleCloseDate = _saleClosed;
    }

    function setTokenData(
        uint256 _price,
        uint256 _maxSupply,
        uint256 _maxPerTransaction
    ) external onlyContractManager {
        if (totalSupply() > _maxSupply) revert NewSupplyTooLow();

        price = _price;
        maxSupply = _maxSupply;
        maxPerTransaction = _maxPerTransaction;
    }

    function setAddresses(Addresses calldata _addresses)
        external
        onlyContractManager
    {
        if (_addresses.recoveryAddress != addresses.recoveryAddress)
            revert ImmutableRecoveryAddress();

        if (
            addresses.collectionOwnerAddress !=
            _addresses.collectionOwnerAddress
        ) {
            _transferOwnership(_addresses.collectionOwnerAddress);
        }

        addresses = _addresses;
    }

    function setAllowBuy(bool _allowBuy) external onlyContractManager {
        allowBuy = _allowBuy;
    }

    function setRoyalty(uint256 _primaryFee, uint256 _secondaryFee)
        external
        onlyContractManager
    {
        primaryRoyaltyFee = _primaryFee;
        secondaryRoyaltyFee = _secondaryFee;
    }

    // ============== Minting ==============
    function mintBatch(
        address[] calldata _accounts,
        uint256[] calldata _amounts
    ) external onlyContractManager nonContract {
        uint256 length = _accounts.length;

        for (uint256 i = 0; i < length; ) {
            address account = _accounts[i];
            uint256 amount = _amounts[i];

            if (_totalMinted() + amount > maxSupply) revert MaxSupplyExceeded();

            _mint(account, amount);

            unchecked {
                i += 1;
            }
        }
    }

    // ================ Buy ================
    function buyAuthorised(
        uint256 _amount,
        uint256 _totalPrice,
        uint256 _maxPerAddress,
        uint256 _expires,
        bytes calldata _signature
    ) external payable buyAllowed nonContract {
        if (block.timestamp >= _expires) revert SignatureExpired();

        bytes32 hash = keccak256(
            abi.encodePacked(
                address(this),
                msg.sender,
                _amount,
                _totalPrice,
                _maxPerAddress,
                _expires
            )
        );

        bytes32 message = ECDSA.toEthSignedMessageHash(hash);

        if (
            ECDSA.recover(message, _signature) != addresses.authorisationAddress
        ) revert NotAuthorised();

        if (_maxPerAddress != 0) {
            if (_numberMinted(msg.sender) + _amount > _maxPerAddress)
                revert MaxPerAddressExceeded();
        }

        _buy(_amount, _totalPrice);
    }

    function buy(uint256 _amount) external payable buyAllowed nonContract {
        if (publicSaleDate == 0 || block.timestamp < publicSaleDate) revert PublicSaleClosed();

        uint256 totalPrice = price * _amount;
        _buy(_amount, totalPrice);
    }

    function _buy(uint256 _amount, uint256 _totalPrice) internal {
        if (saleCloseDate != 0) {
            if (block.timestamp >= saleCloseDate) revert SaleClosed();
        }
        if (_totalMinted() + _amount > maxSupply) revert MaxSupplyExceeded();
        if (maxPerTransaction != 0) {
            if (_amount > maxPerTransaction) revert MaxPerTransactionExceeded();
        }

        uint256 royaltyAmount = (_totalPrice * primaryRoyaltyFee) /
            BASIS_POINTS;

        if (addresses.purchaseTokenAddress != address(0)) {
            IERC20 token = IERC20(addresses.purchaseTokenAddress);
            /// @dev primary royalty cut for HyperMint
            token.safeTransferFrom(
                msg.sender,
                addresses.managerPrimaryRoyaltyAddress,
                royaltyAmount
            );
            /// @dev primary sale (i.e. minting revenue) for customer (or its payees)
            token.safeTransferFrom(
                msg.sender,
                addresses.customerPrimaryRoyaltyAddress,
                _totalPrice - royaltyAmount
            );
        } else {
            if (msg.value < _totalPrice) revert InsufficientPaymentValue();
            /// @dev primary royalty cut for HyperMint
            payable(addresses.managerPrimaryRoyaltyAddress).transfer(
                royaltyAmount
            );
            /// @dev primary sale (i.e. minting revenue) for customer (or its payees)
            payable(addresses.customerPrimaryRoyaltyAddress).transfer(
                _totalPrice - royaltyAmount
            );
        }

        /// @dev mint tokens
        _mint(msg.sender, _amount);
    }

    // ============= Ownership =============
    function recoverContract() external {
        if (msg.sender != addresses.recoveryAddress) revert NotAuthorised();
        _transferContractManager(addresses.recoveryAddress);
    }

    function _startTokenId() internal pure override returns (uint256 tokenId) {
        tokenId = 1;
    }

    /* ==================== MODIFIERS ===================== */
    modifier buyAllowed() {
        if (!allowBuy) revert BuyDisabled();
        _;
    }

    /// @dev this eliminates the possibility of being called
    ///      from a contract
    modifier nonContract() {
        if (tx.origin != msg.sender) revert ContractCallBlocked();
        _;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (finance/PaymentSplitter.sol)

pragma solidity ^0.8.4;

import '@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol';
import '@openzeppelin/contracts/utils/Address.sol';
import '@openzeppelin/contracts/utils/Context.sol';

/**
 * @title PaymentSplitter
 * @dev This contract allows to split Ether payments among a group of accounts. The sender does not need to be aware
 * that the Ether will be split in this way, since it is handled transparently by the contract.
 *
 * The split can be in equal parts or in any other arbitrary proportion. The way this is specified is by assigning each
 * account to a number of shares. Of all the Ether that this contract receives, each account will then be able to claim
 * an amount proportional to the percentage of total shares they were assigned. The distribution of shares is set at the
 * time of contract deployment and can't be updated thereafter.
 *
 * `PaymentSplitter` follows a _pull payment_ model. This means that payments are not automatically forwarded to the
 * accounts but kept in this contract, and the actual transfer is triggered as a separate step by calling the {release}
 * function.
 *
 * NOTE: This contract assumes that ERC20 tokens will behave similarly to native tokens (Ether). Rebasing tokens, and
 * tokens that apply fees during transfers, are likely to not be supported as expected. If in doubt, we encourage you
 * to run tests before sending real value to this contract.
 */
contract PaymentSplitter is Context {
    event PayeeAdded(address account, uint256 shares);
    event PaymentReleased(address to, uint256 amount);
    event ERC20PaymentReleased(
        IERC20 indexed token,
        address to,
        uint256 amount
    );
    event PaymentReceived(address from, uint256 amount);

    uint256 internal _totalShares;
    uint256 internal _totalReleased;

    mapping(address => uint256) internal _shares;
    mapping(address => uint256) internal _released;
    address[] internal _payees;

    mapping(IERC20 => uint256) private _erc20TotalReleased;
    mapping(IERC20 => mapping(address => uint256)) private _erc20Released;

    /**
     * @dev Creates an instance of `PaymentSplitter` where each account in `payees` is assigned the number of shares at
     * the matching position in the `shares` array.
     *
     * All addresses in `payees` must be non-zero. Both arrays must have the same non-zero length, and there must be no
     * duplicates in `payees`.
     */
    constructor(address[] memory payees, uint256[] memory shares_) payable {
        require(
            payees.length == shares_.length,
            'PaymentSplitter: payees and shares length mismatch'
        );
        require(payees.length > 0, 'PaymentSplitter: no payees');

        for (uint256 i = 0; i < payees.length; i++) {
            _addPayee(payees[i], shares_[i]);
        }
    }

    /**
     * @dev The Ether received will be logged with {PaymentReceived} events. Note that these events are not fully
     * reliable: it's possible for a contract to receive Ether without triggering this function. This only affects the
     * reliability of the events, and not the actual splitting of Ether.
     *
     * To learn more about this see the Solidity documentation for
     * https://solidity.readthedocs.io/en/latest/contracts.html#fallback-function[fallback
     * functions].
     */
    receive() external payable virtual {
        emit PaymentReceived(_msgSender(), msg.value);
    }

    /**
     * @dev Getter for the total shares held by payees.
     */
    function totalShares() public view returns (uint256) {
        return _totalShares;
    }

    /**
     * @dev Getter for the total amount of Ether already released.
     */
    function totalReleased() public view returns (uint256) {
        return _totalReleased;
    }

    /**
     * @dev Getter for the total amount of `token` already released. `token` should be the address of an IERC20
     * contract.
     */
    function totalReleased(IERC20 token) public view returns (uint256) {
        return _erc20TotalReleased[token];
    }

    /**
     * @dev Getter for the amount of shares held by an account.
     */
    function shares(address account) public view returns (uint256) {
        return _shares[account];
    }

    /**
     * @dev Getter for the amount of Ether already released to a payee.
     */
    function released(address account) public view returns (uint256) {
        return _released[account];
    }

    function releasedAll()
        public
        view
        returns (address[] memory, uint256[] memory)
    {
        address[] memory addresses = new address[](_payees.length);
        uint256[] memory releasedAmounts = new uint256[](_payees.length);

        for (uint256 i = 0; i < _payees.length; i++) {
            addresses[i] = _payees[i];
            releasedAmounts[i] = _released[_payees[i]];
        }
        return (addresses, releasedAmounts);
    }

    /**
     * @dev Getter for the amount of payee's releasable Ether.
     */
    function releasable(address account) public view returns (uint256) {
        uint256 totalReceived = address(this).balance + totalReleased();
        return _pendingPayment(account, totalReceived, released(account));
    }

    /**
     * @dev Getter for the amounts of all payees' releasable Ether.
     */
    function releasableAll()
        public
        view
        returns (address[] memory, uint256[] memory)
    {
        address[] memory addresses = new address[](_payees.length);
        uint256[] memory releasableAmounts = new uint256[](_payees.length);

        for (uint256 i = 0; i < _payees.length; i++) {
            addresses[i] = _payees[i];
            releasableAmounts[i] = releasable(_payees[i]);
        }
        return (addresses, releasableAmounts);
    }

    /**
     * @dev Getter for the amount of `token` tokens already released to a payee. `token` should be the address of an
     * IERC20 contract.
     */
    function released(IERC20 token, address account)
        public
        view
        returns (uint256)
    {
        return _erc20Released[token][account];
    }

    /// @dev added here because _erc20Released is private
    function releasedAll(IERC20 token)
        public
        view
        returns (address[] memory, uint256[] memory)
    {
        address[] memory addresses = new address[](_payees.length);
        uint256[] memory releasedAmounts = new uint256[](_payees.length);

        for (uint256 i = 0; i < _payees.length; i++) {
            addresses[i] = _payees[i];
            releasedAmounts[i] = _erc20Released[token][_payees[i]];
        }
        return (addresses, releasedAmounts);
    }

    /**
     * @dev Getter for the amount of payee's releasable `token` tokens. `token` should be the address of an
     * IERC20 contract.
     */
    function releasable(IERC20 token, address account)
        public
        view
        returns (uint256)
    {
        uint256 totalReceived = token.balanceOf(address(this)) +
            totalReleased(token);
        return
            _pendingPayment(account, totalReceived, released(token, account));
    }

    /**
     * @dev Getter for the amounts of all payees' releasable `token` tokens. `token` should be the address of an
     * IERC20 contract.
     */
    function releasableAll(IERC20 token)
        public
        view
        returns (address[] memory, uint256[] memory)
    {
        address[] memory addresses = new address[](_payees.length);
        uint256[] memory releasableAmounts = new uint256[](_payees.length);

        for (uint256 i = 0; i < _payees.length; i++) {
            addresses[i] = _payees[i];
            releasableAmounts[i] = releasable(token, _payees[i]);
        }
        return (addresses, releasableAmounts);
    }

    /**
     * @dev Getter for the address of the payee number `index`.
     */
    function payee(uint256 index) public view returns (address) {
        return _payees[index];
    }

    /**
     * @dev Triggers a transfer to `account` of the amount of Ether they are owed, according to their percentage of the
     * total shares and their previous withdrawals.
     */
    function release(address payable account) public virtual {
        require(_shares[account] > 0, 'PaymentSplitter: account has no shares');

        uint256 payment = releasable(account);

        require(payment != 0, 'PaymentSplitter: account is not due payment');

        // _totalReleased is the sum of all values in _released.
        // If "_totalReleased += payment" does not overflow, then "_released[account] += payment" cannot overflow.
        _totalReleased += payment;
        unchecked {
            _released[account] += payment;
        }

        Address.sendValue(account, payment);
        emit PaymentReleased(account, payment);
    }

    /**
     * @dev Triggers a transfer to `account` of the amount of `token` tokens they are owed, according to their
     * percentage of the total shares and their previous withdrawals. `token` must be the address of an IERC20
     * contract.
     */
    function release(IERC20 token, address account) public virtual {
        require(_shares[account] > 0, 'PaymentSplitter: account has no shares');

        uint256 payment = releasable(token, account);

        require(payment != 0, 'PaymentSplitter: account is not due payment');

        // _erc20TotalReleased[token] is the sum of all values in _erc20Released[token].
        // If "_erc20TotalReleased[token] += payment" does not overflow, then "_erc20Released[token][account] += payment"
        // cannot overflow.
        _erc20TotalReleased[token] += payment;
        unchecked {
            _erc20Released[token][account] += payment;
        }

        SafeERC20.safeTransfer(token, account, payment);
        emit ERC20PaymentReleased(token, account, payment);
    }

    /**
     * @dev internal logic for computing the pending payment of an `account` given the token historical balances and
     * already released amounts.
     */
    function _pendingPayment(
        address account,
        uint256 totalReceived,
        uint256 alreadyReleased
    ) private view returns (uint256) {
        return
            (totalReceived * _shares[account]) / _totalShares - alreadyReleased;
    }

    /**
     * @dev Add a new payee to the contract.
     * @param account The address of the payee to add.
     * @param shares_ The number of shares owned by the payee.
     */
    function _addPayee(address account, uint256 shares_) internal {
        require(
            account != address(0),
            'PaymentSplitter: account is the zero address'
        );
        require(shares_ > 0, 'PaymentSplitter: shares are 0');
        require(
            _shares[account] == 0,
            'PaymentSplitter: account already has shares'
        );

        _payees.push(account);
        _shares[account] = shares_;
        _totalShares = _totalShares + shares_;
        emit PayeeAdded(account, shares_);
    }
}

//SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

import './PaymentSplitter.sol';
import '@openzeppelin/contracts/access/Ownable.sol';

contract Splitter is Ownable, PaymentSplitter {
    constructor(address[] memory _payees, uint256[] memory _shares)
        PaymentSplitter(_payees, _shares)
    {}

    function totalPayees() public view returns (uint256) {
        return _payees.length;
    }

    function isPayee(address account) public view returns (bool) {
        return _shares[account] > 0;
    }

    function addPayee(address account, uint256 shares_) public onlyOwner {
        _addPayee(account, shares_);
    }

    function addPayees(address[] memory payees, uint256[] memory shares_)
        public
        onlyOwner
    {
        for (uint256 i = 0; i < payees.length; i++) {
            _addPayee(payees[i], shares_[i]);
        }
    }

    /********************** ETH **********************/
    function releaseAll() public onlyOwner {
        for (uint256 i = 0; i < _payees.length; i++) {
            release(payable(_payees[i]));
        }
    }

    /********************* ERC20 *********************/
    function releaseAll(IERC20 token) public onlyOwner {
        for (uint256 i = 0; i < _payees.length; i++) {
            release(token, _payees[i]);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/Context.sol";

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

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

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

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

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

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

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

{
  "evmVersion": "istanbul",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": true,
    "runs": 1000
  },
  "remappings": [],
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

• No Contract Security Audit Submitted- Submit Audit Here

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