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// SPDX-License-Identifier: AGPL-3.0

pragma solidity ^0.8.9;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";

import "../../../common/meta-transactions/ERC2771ContextOwnable.sol";
import "../extensions/ERC721CollectionMetadataExtension.sol";
import "../extensions/ERC721PrefixedMetadataExtension.sol";
import "../extensions/ERC721AutoIdMinterExtension.sol";
import "../extensions/ERC721OwnerMintExtension.sol";
import "../extensions/ERC721PreSaleExtension.sol";
import "../extensions/ERC721PublicSaleExtension.sol";
import "../extensions/ERC721SimpleProceedsExtension.sol";
import "../extensions/ERC721RoleBasedMintExtension.sol";
import "../extensions/ERC721RoyaltyExtension.sol";
import "../extensions/ERC721BulkifyExtension.sol";
import "../extensions/ERC721OpenSeaNoGasExtension.sol";

contract ERC721FullFeaturedCollection is
    Ownable,
    ERC165Storage,
    ERC721,
    ERC2771ContextOwnable,
    ERC721CollectionMetadataExtension,
    ERC721PrefixedMetadataExtension,
    ERC721AutoIdMinterExtension,
    ERC721OwnerMintExtension,
    ERC721PreSaleExtension,
    ERC721PublicSaleExtension,
    ERC721SimpleProceedsExtension,
    ERC721RoleBasedMintExtension,
    ERC721RoyaltyExtension,
    ERC721OpenSeaNoGasExtension,
    ERC721BulkifyExtension
{
    struct Config {
        string name;
        string symbol;
        string contractURI;
        string placeholderURI;
        uint256 maxSupply;
        uint256 preSalePrice;
        uint256 preSaleMaxMintPerWallet;
        uint256 publicSalePrice;
        uint256 publicSaleMaxMintPerTx;
        address defaultRoyaltyAddress;
        uint16 defaultRoyaltyBps;
        address openSeaProxyRegistryAddress;
        address openSeaExchangeAddress;
        address trustedForwarder;
    }

    constructor(Config memory config)
        ERC721(config.name, config.symbol)
        ERC721CollectionMetadataExtension(config.contractURI)
        ERC721PrefixedMetadataExtension(config.placeholderURI)
        ERC721AutoIdMinterExtension(config.maxSupply)
        ERC721PreSaleExtension(
            config.preSalePrice,
            config.preSaleMaxMintPerWallet
        )
        ERC721PublicSaleExtension(
            config.publicSalePrice,
            config.publicSaleMaxMintPerTx
        )
        ERC721RoyaltyExtension(
            config.defaultRoyaltyAddress,
            config.defaultRoyaltyBps
        )
        ERC721OpenSeaNoGasExtension(
            config.openSeaProxyRegistryAddress,
            config.openSeaExchangeAddress
        )
        ERC2771ContextOwnable(config.trustedForwarder)
    {
        _setupRole(DEFAULT_ADMIN_ROLE, _msgSender());
        _setupRole(MINTER_ROLE, _msgSender());
    }

    function _msgSender()
        internal
        view
        virtual
        override(ERC2771ContextOwnable, Context)
        returns (address sender)
    {
        return super._msgSender();
    }

    function _msgData()
        internal
        view
        virtual
        override(ERC2771ContextOwnable, Context)
        returns (bytes calldata)
    {
        return super._msgData();
    }

    // PUBLIC

    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(
            ERC165Storage,
            ERC721,
            ERC721CollectionMetadataExtension,
            ERC721PrefixedMetadataExtension,
            ERC721AutoIdMinterExtension,
            ERC721PreSaleExtension,
            ERC721PublicSaleExtension,
            ERC721SimpleProceedsExtension,
            ERC721OwnerMintExtension,
            ERC721RoleBasedMintExtension,
            ERC721RoyaltyExtension,
            ERC721OpenSeaNoGasExtension,
            ERC721BulkifyExtension
        )
        returns (bool)
    {
        return
            ERC721.supportsInterface(interfaceId) ||
            ERC165Storage.supportsInterface(interfaceId);
    }

    /**
     * Override isApprovedForAll to whitelist user's OpenSea proxy accounts to enable gas-less listings.
     */
    function isApprovedForAll(address owner, address operator)
        public
        view
        override(ERC721, ERC721OpenSeaNoGasExtension)
        returns (bool)
    {
        return super.isApprovedForAll(owner, operator);
    }

    function tokenURI(uint256 _tokenId)
        public
        view
        virtual
        override(ERC721, ERC721PrefixedMetadataExtension)
        returns (string memory)
    {
        return ERC721PrefixedMetadataExtension.tokenURI(_tokenId);
    }

    function getInfo()
        external
        view
        returns (
            uint256 _maxSupply,
            uint256 _totalSupply,
            uint256 _senderBalance,
            uint256 _preSalePrice,
            uint256 _preSaleMaxMintPerWallet,
            uint256 _preSaleAlreadyClaimed,
            bool _preSaleActive,
            uint256 _publicSalePrice,
            uint256 _publicSaleMaxMintPerTx,
            bool _publicSaleActive
        )
    {
        uint256 balance = 0;

        if (_msgSender() != address(0)) {
            balance = this.balanceOf(_msgSender());
        }

        return (
            maxSupply,
            this.totalSupply(),
            balance,
            preSalePrice,
            preSaleMaxMintPerWallet,
            preSaleAllowlistClaimed[_msgSender()],
            preSaleStatus,
            publicSalePrice,
            publicSaleMaxMintPerTx,
            publicSaleStatus
        );
    }
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity ^0.8.9;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol";

interface ERC721AutoIdMinterExtensionInterface {
    function setMaxSupply(uint256 newValue) external;

    function freezeMaxSupply() external;

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

/**
 * @dev Extension to add minting capability with an auto incremented ID for each token and a maximum supply setting.
 */
abstract contract ERC721AutoIdMinterExtension is
    Ownable,
    ERC165Storage,
    ERC721,
    ERC721AutoIdMinterExtensionInterface
{
    using SafeMath for uint256;

    uint256 public maxSupply;

    bool internal _maxSupplyFrozen;
    uint256 internal _currentTokenId = 0;

    constructor(uint256 _maxSupply) {
        maxSupply = _maxSupply;

        _registerInterface(
            type(ERC721AutoIdMinterExtensionInterface).interfaceId
        );
    }

    // ADMIN

    function setMaxSupply(uint256 newValue) external onlyOwner {
        require(!_maxSupplyFrozen, "BASE_URI_FROZEN");
        maxSupply = newValue;
    }

    function freezeMaxSupply() external onlyOwner {
        _maxSupplyFrozen = true;
    }

    // PUBLIC

    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(ERC165Storage, ERC721)
        returns (bool)
    {
        return ERC165Storage.supportsInterface(interfaceId);
    }

    function totalSupply() public view returns (uint256) {
        return _currentTokenId;
    }

    // INTERNAL

    function _mintTo(address to, uint256 count) internal {
        require(totalSupply() + count <= maxSupply, "EXCEEDS_MAX_SUPPLY");

        for (uint256 i = 0; i < count; i++) {
            uint256 newTokenId = _getNextTokenId();
            _safeMint(to, newTokenId);
            _incrementTokenId();
        }
    }

    /**
     * Calculates the next token ID based on value of _currentTokenId
     * @return uint256 for the next token ID
     */
    function _getNextTokenId() internal view returns (uint256) {
        return _currentTokenId.add(1);
    }

    /**
     * Increments the value of _currentTokenId
     */
    function _incrementTokenId() internal {
        _currentTokenId++;
    }
}

// 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);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (utils/math/SafeMath.sol)

pragma solidity ^0.8.0;

// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.

/**
 * @dev Wrappers over Solidity's arithmetic operations.
 *
 * NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler
 * now has built in overflow checking.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
            // benefit is lost if 'b' is also tested.
            // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        return a + b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return a - b;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        return a * b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/ERC721.sol)

pragma solidity ^0.8.0;

import "./IERC721.sol";
import "./IERC721Receiver.sol";
import "./extensions/IERC721Metadata.sol";
import "../../utils/Address.sol";
import "../../utils/Context.sol";
import "../../utils/Strings.sol";
import "../../utils/introspection/ERC165.sol";

/**
 * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
 * the Metadata extension, but not including the Enumerable extension, which is available separately as
 * {ERC721Enumerable}.
 */
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
    using Address for address;
    using Strings for uint256;

    // Token name
    string private _name;

    // Token symbol
    string private _symbol;

    // Mapping from token ID to owner address
    mapping(uint256 => address) private _owners;

    // Mapping owner address to token count
    mapping(address => uint256) private _balances;

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

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

    /**
     * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
     */
    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
        return
            interfaceId == type(IERC721).interfaceId ||
            interfaceId == type(IERC721Metadata).interfaceId ||
            super.supportsInterface(interfaceId);
    }

    /**
     * @dev See {IERC721-balanceOf}.
     */
    function balanceOf(address owner) public view virtual override returns (uint256) {
        require(owner != address(0), "ERC721: balance query for the zero address");
        return _balances[owner];
    }

    /**
     * @dev See {IERC721-ownerOf}.
     */
    function ownerOf(uint256 tokenId) public view virtual override returns (address) {
        address owner = _owners[tokenId];
        require(owner != address(0), "ERC721: owner query for nonexistent token");
        return owner;
    }

    /**
     * @dev See {IERC721Metadata-name}.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev See {IERC721Metadata-symbol}.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev See {IERC721Metadata-tokenURI}.
     */
    function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
        require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");

        string memory baseURI = _baseURI();
        return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
    }

    /**
     * @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, can be overridden in child contracts.
     */
    function _baseURI() internal view virtual returns (string memory) {
        return "";
    }

    /**
     * @dev See {IERC721-approve}.
     */
    function approve(address to, uint256 tokenId) public virtual override {
        address owner = ERC721.ownerOf(tokenId);
        require(to != owner, "ERC721: approval to current owner");

        require(
            _msgSender() == owner || isApprovedForAll(owner, _msgSender()),
            "ERC721: approve caller is not owner nor approved for all"
        );

        _approve(to, tokenId);
    }

    /**
     * @dev See {IERC721-getApproved}.
     */
    function getApproved(uint256 tokenId) public view virtual override returns (address) {
        require(_exists(tokenId), "ERC721: approved query for nonexistent token");

        return _tokenApprovals[tokenId];
    }

    /**
     * @dev See {IERC721-setApprovalForAll}.
     */
    function setApprovalForAll(address operator, bool approved) public virtual override {
        _setApprovalForAll(_msgSender(), operator, approved);
    }

    /**
     * @dev See {IERC721-isApprovedForAll}.
     */
    function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
        return _operatorApprovals[owner][operator];
    }

    /**
     * @dev See {IERC721-transferFrom}.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) public virtual override {
        //solhint-disable-next-line max-line-length
        require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");

        _transfer(from, to, tokenId);
    }

    /**
     * @dev See {IERC721-safeTransferFrom}.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) public virtual override {
        safeTransferFrom(from, to, tokenId, "");
    }

    /**
     * @dev See {IERC721-safeTransferFrom}.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) public virtual override {
        require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
        _safeTransfer(from, to, tokenId, _data);
    }

    /**
     * @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.
     *
     * `_data` is additional data, it has no specified format and it is sent in call to `to`.
     *
     * This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
     * implement alternative mechanisms to perform token transfer, such as signature-based.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function _safeTransfer(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) internal virtual {
        _transfer(from, to, tokenId);
        require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
    }

    /**
     * @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 (`_mint`),
     * and stop existing when they are burned (`_burn`).
     */
    function _exists(uint256 tokenId) internal view virtual returns (bool) {
        return _owners[tokenId] != address(0);
    }

    /**
     * @dev Returns whether `spender` is allowed to manage `tokenId`.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
        require(_exists(tokenId), "ERC721: operator query for nonexistent token");
        address owner = ERC721.ownerOf(tokenId);
        return (spender == owner || isApprovedForAll(owner, spender) || getApproved(tokenId) == spender);
    }

    /**
     * @dev Safely mints `tokenId` and transfers it to `to`.
     *
     * Requirements:
     *
     * - `tokenId` must not exist.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function _safeMint(address to, uint256 tokenId) internal virtual {
        _safeMint(to, tokenId, "");
    }

    /**
     * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
     * forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
     */
    function _safeMint(
        address to,
        uint256 tokenId,
        bytes memory _data
    ) internal virtual {
        _mint(to, tokenId);
        require(
            _checkOnERC721Received(address(0), to, tokenId, _data),
            "ERC721: transfer to non ERC721Receiver implementer"
        );
    }

    /**
     * @dev Mints `tokenId` and transfers it to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
     *
     * Requirements:
     *
     * - `tokenId` must not exist.
     * - `to` cannot be the zero address.
     *
     * Emits a {Transfer} event.
     */
    function _mint(address to, uint256 tokenId) internal virtual {
        require(to != address(0), "ERC721: mint to the zero address");
        require(!_exists(tokenId), "ERC721: token already minted");

        _beforeTokenTransfer(address(0), to, tokenId);

        _balances[to] += 1;
        _owners[tokenId] = to;

        emit Transfer(address(0), to, tokenId);

        _afterTokenTransfer(address(0), to, tokenId);
    }

    /**
     * @dev Destroys `tokenId`.
     * The approval is cleared when the token is burned.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     *
     * Emits a {Transfer} event.
     */
    function _burn(uint256 tokenId) internal virtual {
        address owner = ERC721.ownerOf(tokenId);

        _beforeTokenTransfer(owner, address(0), tokenId);

        // Clear approvals
        _approve(address(0), tokenId);

        _balances[owner] -= 1;
        delete _owners[tokenId];

        emit Transfer(owner, address(0), tokenId);

        _afterTokenTransfer(owner, address(0), tokenId);
    }

    /**
     * @dev Transfers `tokenId` from `from` to `to`.
     *  As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     *
     * Emits a {Transfer} event.
     */
    function _transfer(
        address from,
        address to,
        uint256 tokenId
    ) internal virtual {
        require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer from incorrect owner");
        require(to != address(0), "ERC721: transfer to the zero address");

        _beforeTokenTransfer(from, to, tokenId);

        // Clear approvals from the previous owner
        _approve(address(0), tokenId);

        _balances[from] -= 1;
        _balances[to] += 1;
        _owners[tokenId] = to;

        emit Transfer(from, to, tokenId);

        _afterTokenTransfer(from, to, tokenId);
    }

    /**
     * @dev Approve `to` to operate on `tokenId`
     *
     * Emits a {Approval} event.
     */
    function _approve(address to, uint256 tokenId) internal virtual {
        _tokenApprovals[tokenId] = to;
        emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
    }

    /**
     * @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, "ERC721: approve to caller");
        _operatorApprovals[owner][operator] = approved;
        emit ApprovalForAll(owner, operator, approved);
    }

    /**
     * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
     * The call is not executed if the target address is not a contract.
     *
     * @param from address representing the previous owner of the given token ID
     * @param to target address that will receive the tokens
     * @param tokenId uint256 ID of the token to be transferred
     * @param _data bytes optional data to send along with the call
     * @return bool whether the call correctly returned the expected magic value
     */
    function _checkOnERC721Received(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) private returns (bool) {
        if (to.isContract()) {
            try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
                return retval == IERC721Receiver.onERC721Received.selector;
            } catch (bytes memory reason) {
                if (reason.length == 0) {
                    revert("ERC721: transfer to non ERC721Receiver implementer");
                } else {
                    assembly {
                        revert(add(32, reason), mload(reason))
                    }
                }
            }
        } else {
            return true;
        }
    }

    /**
     * @dev Hook that is called before any token transfer. This includes minting
     * and burning.
     *
     * 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, ``from``'s `tokenId` will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 tokenId
    ) internal virtual {}

    /**
     * @dev Hook that is called after any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _afterTokenTransfer(
        address from,
        address to,
        uint256 tokenId
    ) internal virtual {}
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165Storage.sol)

pragma solidity ^0.8.0;

import "./ERC165.sol";

/**
 * @dev Storage based implementation of the {IERC165} interface.
 *
 * Contracts may inherit from this and call {_registerInterface} to declare
 * their support of an interface.
 */
abstract contract ERC165Storage is ERC165 {
    /**
     * @dev Mapping of interface ids to whether or not it's supported.
     */
    mapping(bytes4 => bool) private _supportedInterfaces;

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return super.supportsInterface(interfaceId) || _supportedInterfaces[interfaceId];
    }

    /**
     * @dev Registers the contract as an implementer of the interface defined by
     * `interfaceId`. Support of the actual ERC165 interface is automatic and
     * registering its interface id is not required.
     *
     * See {IERC165-supportsInterface}.
     *
     * Requirements:
     *
     * - `interfaceId` cannot be the ERC165 invalid interface (`0xffffffff`).
     */
    function _registerInterface(bytes4 interfaceId) internal virtual {
        require(interfaceId != 0xffffffff, "ERC165: invalid interface id");
        _supportedInterfaces[interfaceId] = true;
    }
}

// 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 (last updated v4.6.0) (token/ERC721/IERC721.sol)

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

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

    /**
     * @dev 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);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol)

pragma solidity ^0.8.0;

/**
 * @title ERC721 token receiver interface
 * @dev Interface for any contract that wants to support safeTransfers
 * from ERC721 asset contracts.
 */
interface IERC721Receiver {
    /**
     * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
     * by `operator` from `from`, this function is called.
     *
     * It must return its Solidity selector to confirm the token transfer.
     * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
     *
     * The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`.
     */
    function onERC721Received(
        address operator,
        address from,
        uint256 tokenId,
        bytes calldata data
    ) external returns (bytes4);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)

pragma solidity ^0.8.0;

import "../IERC721.sol";

/**
 * @title ERC-721 Non-Fungible Token Standard, optional metadata extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721Metadata is IERC721 {
    /**
     * @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);
}

// 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/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
// 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/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: AGPL-3.0

pragma solidity ^0.8.9;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";

import "../../../common/meta-transactions/ERC2771ContextOwnable.sol";
import "../extensions/ERC721CollectionMetadataExtension.sol";
import "../extensions/ERC721PrefixedMetadataExtension.sol";
import "../extensions/ERC721AutoIdMinterExtension.sol";
import "../extensions/ERC721OwnerMintExtension.sol";

contract ERC721SimplePrefixedCollection is
    Ownable,
    ERC165Storage,
    ERC2771ContextOwnable,
    ERC721,
    ERC721CollectionMetadataExtension,
    ERC721PrefixedMetadataExtension,
    ERC721AutoIdMinterExtension,
    ERC721OwnerMintExtension
{
    struct Config {
        string name;
        string symbol;
        string contractURI;
        string placeholderURI;
        uint256 maxSupply;
        address trustedForwarder;
    }

    constructor(Config memory config)
        ERC721(config.name, config.symbol)
        ERC721CollectionMetadataExtension(config.contractURI)
        ERC721PrefixedMetadataExtension(config.placeholderURI)
        ERC721AutoIdMinterExtension(maxSupply)
        ERC2771ContextOwnable(config.trustedForwarder)
    {}

    function _msgSender()
        internal
        view
        virtual
        override(ERC2771ContextOwnable, Context)
        returns (address sender)
    {
        return super._msgSender();
    }

    function _msgData()
        internal
        view
        virtual
        override(ERC2771ContextOwnable, Context)
        returns (bytes calldata)
    {
        return super._msgData();
    }

    // PUBLIC

    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(
            ERC165Storage,
            ERC721,
            ERC721AutoIdMinterExtension,
            ERC721CollectionMetadataExtension,
            ERC721OwnerMintExtension,
            ERC721PrefixedMetadataExtension
        )
        returns (bool)
    {
        return
            ERC721.supportsInterface(interfaceId) ||
            ERC165Storage.supportsInterface(interfaceId);
    }

    function tokenURI(uint256 _tokenId)
        public
        view
        virtual
        override(ERC721, ERC721PrefixedMetadataExtension)
        returns (string memory)
    {
        return ERC721PrefixedMetadataExtension.tokenURI(_tokenId);
    }

    function getInfo()
        external
        view
        returns (
            uint256 _maxSupply,
            uint256 _totalSupply,
            uint256 _senderBalance
        )
    {
        uint256 balance = 0;

        if (_msgSender() != address(0)) {
            balance = this.balanceOf(_msgSender());
        }

        return (maxSupply, this.totalSupply(), balance);
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.9;

import "@openzeppelin/contracts/utils/Context.sol";
import "@openzeppelin/contracts/access/Ownable.sol";

/**
 * @dev Context variant with ERC2771 support.
 */
abstract contract ERC2771ContextOwnable is Context, Ownable {
    address public _trustedForwarder;

    /// @custom:oz-upgrades-unsafe-allow constructor
    constructor(address trustedForwarder) {
        _trustedForwarder = trustedForwarder;
    }

    function setTrustedForwarder(address trustedForwarder) public onlyOwner {
        _trustedForwarder = trustedForwarder;
    }

    function isTrustedForwarder(address forwarder)
        public
        view
        virtual
        returns (bool)
    {
        return forwarder == _trustedForwarder;
    }

    function _msgSender()
        internal
        view
        virtual
        override
        returns (address sender)
    {
        if (isTrustedForwarder(msg.sender)) {
            // The assembly code is more direct than the Solidity version using `abi.decode`.
            assembly {
                sender := shr(96, calldataload(sub(calldatasize(), 20)))
            }
        } else {
            return super._msgSender();
        }
    }

    function _msgData()
        internal
        view
        virtual
        override
        returns (bytes calldata)
    {
        if (isTrustedForwarder(msg.sender)) {
            return msg.data[:msg.data.length - 20];
        } else {
            return super._msgData();
        }
    }
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity ^0.8.9;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol";

interface ERC721CollectionMetadataExtensionInterface {
    function setContractURI(string memory newValue) external;

    function contractURI() external view returns (string memory);
}

/**
 * @dev Extension to allow configuring contract-level collection metadata URI.
 */
abstract contract ERC721CollectionMetadataExtension is
    Ownable,
    ERC165Storage,
    ERC721CollectionMetadataExtensionInterface
{
    string private _contractURI;

    constructor(string memory contractURI_) {
        _contractURI = contractURI_;

        _registerInterface(
            type(ERC721CollectionMetadataExtensionInterface).interfaceId
        );
    }

    // ADMIN

    function setContractURI(string memory newValue) external onlyOwner {
        _contractURI = newValue;
    }

    // PUBLIC

    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(ERC165Storage)
        returns (bool)
    {
        return ERC165Storage.supportsInterface(interfaceId);
    }

    function contractURI() public view returns (string memory) {
        return _contractURI;
    }
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity ^0.8.9;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Strings.sol";
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol";

interface ERC721PrefixedMetadataExtensionInterface {
    function setPlaceholderURI(string memory newValue) external;

    function setBaseURI(string memory newValue) external;

    function freezeBaseURI() external;

    function baseTokenURI() external view returns (string memory);

    function placeholderURI() external view returns (string memory);

    function tokenURI(uint256 _tokenId) external view returns (string memory);
}

/**
 * @dev Extension to allow configuring tokens metadata URI.
 *      In this extension tokens will have a shared token URI prefix,
 *      therefore on tokenURI() token's ID will be appended to the base URI.
 *      It also allows configuring a fallback "placeholder" URI when prefix is not set yet.
 */
abstract contract ERC721PrefixedMetadataExtension is
    Ownable,
    ERC165Storage,
    ERC721,
    ERC721PrefixedMetadataExtensionInterface
{
    string private _placeholderURI;
    string private _baseTokenURI;
    bool private _baseURIFrozen;

    constructor(string memory placeholderURI_) {
        _placeholderURI = placeholderURI_;

        _registerInterface(
            type(ERC721PrefixedMetadataExtensionInterface).interfaceId
        );
    }

    // ADMIN

    function setPlaceholderURI(string memory newValue) external onlyOwner {
        _placeholderURI = newValue;
    }

    function setBaseURI(string memory newValue) external onlyOwner {
        require(!_baseURIFrozen, "BASE_URI_FROZEN");
        _baseTokenURI = newValue;
    }

    function freezeBaseURI() external onlyOwner {
        _baseURIFrozen = true;
    }

    // PUBLIC

    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(ERC165Storage, ERC721)
        returns (bool)
    {
        return ERC165Storage.supportsInterface(interfaceId);
    }

    function baseTokenURI() public view returns (string memory) {
        return _baseTokenURI;
    }

    function placeholderURI() public view returns (string memory) {
        return _placeholderURI;
    }

    function tokenURI(uint256 _tokenId)
        public
        view
        virtual
        override(ERC721, ERC721PrefixedMetadataExtensionInterface)
        returns (string memory)
    {
        return
            bytes(_baseTokenURI).length > 0
                ? string(
                    abi.encodePacked(_baseTokenURI, Strings.toString(_tokenId))
                )
                : _placeholderURI;
    }
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity ^0.8.9;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol";

import "./ERC721AutoIdMinterExtension.sol";

interface ERC721OwnerMintExtensionInterface {
    function mintByOwner(address to, uint256 count) external;
}

/**
 * @dev Extension to allow owner to mint directly without paying.
 */
abstract contract ERC721OwnerMintExtension is
    Ownable,
    ERC165Storage,
    ERC721AutoIdMinterExtension,
    ERC721OwnerMintExtensionInterface
{
    constructor() {
        _registerInterface(type(ERC721OwnerMintExtensionInterface).interfaceId);
    }

    // ADMIN

    function mintByOwner(address to, uint256 count) external onlyOwner {
        _mintTo(to, count);
    }

    // PUBLIC

    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(ERC165Storage, ERC721AutoIdMinterExtension)
        returns (bool)
    {
        return ERC165Storage.supportsInterface(interfaceId);
    }
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity ^0.8.9;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";

import "../../../common/meta-transactions/ERC2771ContextOwnable.sol";
import "../extensions/ERC721CollectionMetadataExtension.sol";
import "../extensions/ERC721PerTokenMetadataExtension.sol";
import "../extensions/ERC721OneOfOneMintExtension.sol";
import "../extensions/ERC721AutoIdMinterExtension.sol";
import "../extensions/ERC721OwnerMintExtension.sol";
import "../extensions/ERC721RoyaltyExtension.sol";
import "../extensions/ERC721OpenSeaNoGasExtension.sol";

contract ERC721OneOfOneCollection is
    Ownable,
    ERC165Storage,
    ERC2771ContextOwnable,
    ERC721,
    ERC721AutoIdMinterExtension,
    ERC721CollectionMetadataExtension,
    ERC721OwnerMintExtension,
    ERC721PerTokenMetadataExtension,
    ERC721OneOfOneMintExtension,
    ERC721RoyaltyExtension,
    ERC721OpenSeaNoGasExtension
{
    struct Config {
        string name;
        string symbol;
        string contractURI;
        uint256 maxSupply;
        address defaultRoyaltyAddress;
        uint16 defaultRoyaltyBps;
        address openSeaProxyRegistryAddress;
        address openSeaExchangeAddress;
        address trustedForwarder;
    }

    constructor(Config memory config)
        ERC721(config.name, config.symbol)
        ERC721CollectionMetadataExtension(config.contractURI)
        ERC721PerTokenMetadataExtension()
        ERC721OneOfOneMintExtension()
        ERC721AutoIdMinterExtension(config.maxSupply)
        ERC721RoyaltyExtension(
            config.defaultRoyaltyAddress,
            config.defaultRoyaltyBps
        )
        ERC721OpenSeaNoGasExtension(
            config.openSeaProxyRegistryAddress,
            config.openSeaExchangeAddress
        )
        ERC2771ContextOwnable(config.trustedForwarder)
    {
        _setupRole(DEFAULT_ADMIN_ROLE, _msgSender());
        _setupRole(MINTER_ROLE, _msgSender());
    }

    function _burn(uint256 tokenId)
        internal
        virtual
        override(ERC721, ERC721OneOfOneMintExtension, ERC721URIStorage)
    {
        return ERC721OneOfOneMintExtension._burn(tokenId);
    }

    function _msgSender()
        internal
        view
        virtual
        override(ERC2771ContextOwnable, Context)
        returns (address sender)
    {
        return super._msgSender();
    }

    function _msgData()
        internal
        view
        virtual
        override(ERC2771ContextOwnable, Context)
        returns (bytes calldata)
    {
        return super._msgData();
    }

    // PUBLIC

    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(
            ERC165Storage,
            ERC721,
            ERC721AutoIdMinterExtension,
            ERC721CollectionMetadataExtension,
            ERC721OwnerMintExtension,
            ERC721OneOfOneMintExtension,
            ERC721PerTokenMetadataExtension,
            ERC721RoyaltyExtension,
            ERC721OpenSeaNoGasExtension
        )
        returns (bool)
    {
        return
            ERC721.supportsInterface(interfaceId) ||
            ERC165Storage.supportsInterface(interfaceId);
    }

    /**
     * Override isApprovedForAll to whitelist user's OpenSea proxy accounts to enable gas-less listings.
     */
    function isApprovedForAll(address owner, address operator)
        public
        view
        override(ERC721, ERC721OpenSeaNoGasExtension)
        returns (bool)
    {
        return super.isApprovedForAll(owner, operator);
    }

    function tokenURI(uint256 _tokenId)
        public
        view
        virtual
        override(ERC721, ERC721OneOfOneMintExtension, ERC721URIStorage)
        returns (string memory)
    {
        return ERC721OneOfOneMintExtension.tokenURI(_tokenId);
    }

    function getInfo()
        external
        view
        returns (
            uint256 _maxSupply,
            uint256 _totalSupply,
            uint256 _senderBalance
        )
    {
        uint256 balance = 0;

        if (_msgSender() != address(0)) {
            balance = this.balanceOf(_msgSender());
        }

        return (maxSupply, this.totalSupply(), balance);
    }
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity ^0.8.9;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Strings.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol";

interface ERC721PerTokenMetadataExtensionInterface {
    function freezeTokenURIs(uint256 _lastFrozenTokenId) external;

    function setTokenURI(uint256 tokenId, string memory tokenURI) external;
}

/**
 * @dev Extension to allow configuring collection and tokens metadata URI.
 *      In this extension each token will have a different independent token URI set by contract owner.
 *      To enable true self-custody for token owners, an admin can freeze URIs using a token ID pointer that can only be increased.
 */
abstract contract ERC721PerTokenMetadataExtension is
    Ownable,
    ERC165Storage,
    ERC721URIStorage,
    ERC721PerTokenMetadataExtensionInterface
{
    uint256 public lastFrozenTokenId;

    constructor() {
        _registerInterface(
            type(ERC721PerTokenMetadataExtensionInterface).interfaceId
        );
    }

    // ADMIN

    function freezeTokenURIs(uint256 _lastFrozenTokenId) external onlyOwner {
        require(_lastFrozenTokenId > lastFrozenTokenId, "CANNOT_UNFREEZE");
        lastFrozenTokenId = _lastFrozenTokenId;
    }

    function setTokenURI(uint256 tokenId, string memory tokenURI)
        external
        onlyOwner
    {
        require(tokenId > lastFrozenTokenId, "FROZEN_TOKEN");
        _setTokenURI(tokenId, tokenURI);
    }

    // PUBLIC

    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(ERC165Storage, ERC721)
        returns (bool)
    {
        return ERC165Storage.supportsInterface(interfaceId);
    }
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity ^0.8.9;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/access/AccessControl.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol";

import "./ERC721AutoIdMinterExtension.sol";
import "./ERC721PerTokenMetadataExtension.sol";

interface ERC721OneOfOneMintExtensionInterface {
    function mintWithTokenURIsByOwner(
        address to,
        uint256 count,
        string[] memory tokenURIs
    ) external;

    function mintWithTokenURIsByRole(
        address to,
        uint256 count,
        string[] memory tokenURIs
    ) external;

    function tokenURI(uint256 tokenId) external view returns (string memory);
}

/**
 * @dev Extension to allow owner to mint 1-of-1 NFTs by providing dedicated metadata URI for each token.
 */
abstract contract ERC721OneOfOneMintExtension is
    Ownable,
    ERC165Storage,
    AccessControl,
    ERC721AutoIdMinterExtension,
    ERC721PerTokenMetadataExtension,
    ERC721OneOfOneMintExtensionInterface
{
    bytes32 public constant MINTER_ROLE = keccak256("MINTER_ROLE");

    constructor() {
        _registerInterface(
            type(ERC721OneOfOneMintExtensionInterface).interfaceId
        );
    }

    // ADMIN

    function mintWithTokenURIsByOwner(
        address to,
        uint256 count,
        string[] memory tokenURIs
    ) external onlyOwner {
        uint256 startingTokenId = _getNextTokenId();
        _mintTo(to, count);
        for (uint256 i = 0; i < count; i++) {
            _setTokenURI(startingTokenId + i, tokenURIs[i]);
        }
    }

    function mintWithTokenURIsByRole(
        address to,
        uint256 count,
        string[] memory tokenURIs
    ) external {
        require(hasRole(MINTER_ROLE, _msgSender()), "NOT_MINTER_ROLE");

        uint256 startingTokenId = _getNextTokenId();
        _mintTo(to, count);
        for (uint256 i = 0; i < count; i++) {
            _setTokenURI(startingTokenId + i, tokenURIs[i]);
        }
    }

    // PUBLIC

    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(
            ERC165Storage,
            AccessControl,
            ERC721AutoIdMinterExtension,
            ERC721PerTokenMetadataExtension
        )
        returns (bool)
    {
        return ERC165Storage.supportsInterface(interfaceId);
    }

    function tokenURI(uint256 tokenId)
        public
        view
        virtual
        override(ERC721, ERC721URIStorage, ERC721OneOfOneMintExtensionInterface)
        returns (string memory)
    {
        return ERC721URIStorage.tokenURI(tokenId);
    }

    function _burn(uint256 tokenId)
        internal
        virtual
        override(ERC721, ERC721URIStorage)
    {
        return ERC721URIStorage._burn(tokenId);
    }
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity ^0.8.9;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@manifoldxyz/royalty-registry-solidity/contracts/overrides/IRoyaltyOverride.sol";
import "@manifoldxyz/royalty-registry-solidity/contracts/overrides/RoyaltyOverrideCore.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol";

import "../../../misc/rarible/IRoyalties.sol";
import "../../../misc/rarible/LibPart.sol";
import "../../../misc/rarible/LibRoyaltiesV2.sol";

interface ERC721RoyaltyExtensionInterface {
    function setTokenRoyalties(
        IEIP2981RoyaltyOverride.TokenRoyaltyConfig[] calldata royaltyConfigs
    ) external;

    function setDefaultRoyalty(
        IEIP2981RoyaltyOverride.TokenRoyalty calldata royalty
    ) external;

    function getRaribleV2Royalties(uint256 id)
        external
        view
        returns (LibPart.Part[] memory result);
}

/**
 * @dev Extension to signal configured royalty to famous marketplaces as well as ERC2981.
 *
 * This extension currently supports Standard ERC2981, Rarible.
 * Note that OpenSea is supported via Flair metadata feature.
 */
abstract contract ERC721RoyaltyExtension is
    Ownable,
    ERC165Storage,
    EIP2981RoyaltyOverrideCore,
    IRoyalties,
    ERC721RoyaltyExtensionInterface
{
    constructor(address defaultRoyaltyReceiver, uint16 defaultRoyaltyBps) {
        TokenRoyalty memory royalty = TokenRoyalty(
            defaultRoyaltyReceiver,
            defaultRoyaltyBps
        );

        _setDefaultRoyalty(royalty);

        _registerInterface(type(ERC721RoyaltyExtensionInterface).interfaceId);
        _registerInterface(type(IEIP2981).interfaceId);
        _registerInterface(type(IEIP2981RoyaltyOverride).interfaceId);
        _registerInterface(LibRoyaltiesV2._INTERFACE_ID_ROYALTIES);
    }

    function setTokenRoyalties(TokenRoyaltyConfig[] calldata royaltyConfigs)
        external
        override(IEIP2981RoyaltyOverride, ERC721RoyaltyExtensionInterface)
        onlyOwner
    {
        _setTokenRoyalties(royaltyConfigs);
    }

    function setDefaultRoyalty(TokenRoyalty calldata royalty)
        external
        override(IEIP2981RoyaltyOverride, ERC721RoyaltyExtensionInterface)
        onlyOwner
    {
        _setDefaultRoyalty(royalty);
    }

    function getRaribleV2Royalties(uint256 id)
        external
        view
        override(IRoyalties, ERC721RoyaltyExtensionInterface)
        returns (LibPart.Part[] memory result)
    {
        result = new LibPart.Part[](1);

        result[0].account = payable(defaultRoyalty.recipient);
        result[0].value = defaultRoyalty.bps;

        id;
        // avoid unused param warning
    }

    // PUBLIC

    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(ERC165Storage, EIP2981RoyaltyOverrideCore)
        returns (bool)
    {
        return ERC165Storage.supportsInterface(interfaceId);
    }
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity ^0.8.9;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol";

import "../../../misc/opensea/ProxyRegistry.sol";

interface ERC721OpenSeaNoGasExtensionInterface {
    function setOpenSeaProxyRegistryAddress(address addr) external;

    function setOpenSeaExchangeAddress(address addr) external;

    function isApprovedForAll(address owner, address operator)
        external
        view
        returns (bool);
}

/**
 * @dev Extension that automatically approves OpenSea to avoid having users to "Approve" your collection before trading.
 */
abstract contract ERC721OpenSeaNoGasExtension is
    Ownable,
    ERC165Storage,
    ERC721,
    ERC721OpenSeaNoGasExtensionInterface
{
    address internal _openSeaProxyRegistryAddress;
    address private _openSeaExchangeAddress;

    constructor(
        address openSeaProxyRegistryAddress,
        address openSeaExchangeAddress
    ) {
        _openSeaProxyRegistryAddress = openSeaProxyRegistryAddress;
        _openSeaExchangeAddress = openSeaExchangeAddress;

        _registerInterface(
            type(ERC721OpenSeaNoGasExtensionInterface).interfaceId
        );
    }

    // ADMIN

    function setOpenSeaProxyRegistryAddress(address addr) external onlyOwner {
        _openSeaProxyRegistryAddress = addr;
    }

    function setOpenSeaExchangeAddress(address addr) external onlyOwner {
        _openSeaExchangeAddress = addr;
    }

    // PUBLIC

    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(ERC165Storage, ERC721)
        returns (bool)
    {
        return ERC165Storage.supportsInterface(interfaceId);
    }

    /**
     * Override isApprovedForAll to whitelist user's OpenSea proxy accounts to enable gas-less listings.
     */
    function isApprovedForAll(address owner, address operator)
        public
        view
        virtual
        override(ERC721, ERC721OpenSeaNoGasExtensionInterface)
        returns (bool)
    {
        if (_openSeaProxyRegistryAddress != address(0)) {
            // Whitelist OpenSea proxy contract for easy trading.
            ProxyRegistry proxyRegistry = ProxyRegistry(
                _openSeaProxyRegistryAddress
            );

            if (address(proxyRegistry.proxies(owner)) == operator) {
                return true;
            }
        }

        if (_openSeaExchangeAddress != address(0)) {
            // If OpenSea's ERC721 exchange address is detected, auto-approve
            if (operator == address(_openSeaExchangeAddress)) {
                return true;
            }
        }

        return super.isApprovedForAll(owner, operator);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/ERC721URIStorage.sol)

pragma solidity ^0.8.0;

import "../ERC721.sol";

/**
 * @dev ERC721 token with storage based token URI management.
 */
abstract contract ERC721URIStorage is ERC721 {
    using Strings for uint256;

    // Optional mapping for token URIs
    mapping(uint256 => string) private _tokenURIs;

    /**
     * @dev See {IERC721Metadata-tokenURI}.
     */
    function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
        require(_exists(tokenId), "ERC721URIStorage: URI query for nonexistent token");

        string memory _tokenURI = _tokenURIs[tokenId];
        string memory base = _baseURI();

        // If there is no base URI, return the token URI.
        if (bytes(base).length == 0) {
            return _tokenURI;
        }
        // If both are set, concatenate the baseURI and tokenURI (via abi.encodePacked).
        if (bytes(_tokenURI).length > 0) {
            return string(abi.encodePacked(base, _tokenURI));
        }

        return super.tokenURI(tokenId);
    }

    /**
     * @dev Sets `_tokenURI` as the tokenURI of `tokenId`.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function _setTokenURI(uint256 tokenId, string memory _tokenURI) internal virtual {
        require(_exists(tokenId), "ERC721URIStorage: URI set of nonexistent token");
        _tokenURIs[tokenId] = _tokenURI;
    }

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

        if (bytes(_tokenURIs[tokenId]).length != 0) {
            delete _tokenURIs[tokenId];
        }
    }
}

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

pragma solidity ^0.8.0;

import "./IAccessControl.sol";
import "../utils/Context.sol";
import "../utils/Strings.sol";
import "../utils/introspection/ERC165.sol";

/**
 * @dev Contract module that allows children to implement role-based access
 * control mechanisms. This is a lightweight version that doesn't allow enumerating role
 * members except through off-chain means by accessing the contract event logs. Some
 * applications may benefit from on-chain enumerability, for those cases see
 * {AccessControlEnumerable}.
 *
 * Roles are referred to by their `bytes32` identifier. These should be exposed
 * in the external API and be unique. The best way to achieve this is by
 * using `public constant` hash digests:
 *
 * ```
 * bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
 * ```
 *
 * Roles can be used to represent a set of permissions. To restrict access to a
 * function call, use {hasRole}:
 *
 * ```
 * function foo() public {
 *     require(hasRole(MY_ROLE, msg.sender));
 *     ...
 * }
 * ```
 *
 * Roles can be granted and revoked dynamically via the {grantRole} and
 * {revokeRole} functions. Each role has an associated admin role, and only
 * accounts that have a role's admin role can call {grantRole} and {revokeRole}.
 *
 * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
 * that only accounts with this role will be able to grant or revoke other
 * roles. More complex role relationships can be created by using
 * {_setRoleAdmin}.
 *
 * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
 * grant and revoke this role. Extra precautions should be taken to secure
 * accounts that have been granted it.
 */
abstract contract AccessControl is Context, IAccessControl, ERC165 {
    struct RoleData {
        mapping(address => bool) members;
        bytes32 adminRole;
    }

    mapping(bytes32 => RoleData) private _roles;

    bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;

    /**
     * @dev Modifier that checks that an account has a specific role. Reverts
     * with a standardized message including the required role.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     *
     * _Available since v4.1._
     */
    modifier onlyRole(bytes32 role) {
        _checkRole(role);
        _;
    }

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

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) public view virtual override returns (bool) {
        return _roles[role].members[account];
    }

    /**
     * @dev Revert with a standard message if `_msgSender()` is missing `role`.
     * Overriding this function changes the behavior of the {onlyRole} modifier.
     *
     * Format of the revert message is described in {_checkRole}.
     *
     * _Available since v4.6._
     */
    function _checkRole(bytes32 role) internal view virtual {
        _checkRole(role, _msgSender());
    }

    /**
     * @dev Revert with a standard message if `account` is missing `role`.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     */
    function _checkRole(bytes32 role, address account) internal view virtual {
        if (!hasRole(role, account)) {
            revert(
                string(
                    abi.encodePacked(
                        "AccessControl: account ",
                        Strings.toHexString(uint160(account), 20),
                        " is missing role ",
                        Strings.toHexString(uint256(role), 32)
                    )
                )
            );
        }
    }

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) public view virtual override returns (bytes32) {
        return _roles[role].adminRole;
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
        _grantRole(role, account);
    }

    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
        _revokeRole(role, account);
    }

    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been revoked `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `account`.
     */
    function renounceRole(bytes32 role, address account) public virtual override {
        require(account == _msgSender(), "AccessControl: can only renounce roles for self");

        _revokeRole(role, account);
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event. Note that unlike {grantRole}, this function doesn't perform any
     * checks on the calling account.
     *
     * [WARNING]
     * ====
     * This function should only be called from the constructor when setting
     * up the initial roles for the system.
     *
     * Using this function in any other way is effectively circumventing the admin
     * system imposed by {AccessControl}.
     * ====
     *
     * NOTE: This function is deprecated in favor of {_grantRole}.
     */
    function _setupRole(bytes32 role, address account) internal virtual {
        _grantRole(role, account);
    }

    /**
     * @dev Sets `adminRole` as ``role``'s admin role.
     *
     * Emits a {RoleAdminChanged} event.
     */
    function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
        bytes32 previousAdminRole = getRoleAdmin(role);
        _roles[role].adminRole = adminRole;
        emit RoleAdminChanged(role, previousAdminRole, adminRole);
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * Internal function without access restriction.
     */
    function _grantRole(bytes32 role, address account) internal virtual {
        if (!hasRole(role, account)) {
            _roles[role].members[account] = true;
            emit RoleGranted(role, account, _msgSender());
        }
    }

    /**
     * @dev Revokes `role` from `account`.
     *
     * Internal function without access restriction.
     */
    function _revokeRole(bytes32 role, address account) internal virtual {
        if (hasRole(role, account)) {
            _roles[role].members[account] = false;
            emit RoleRevoked(role, account, _msgSender());
        }
    }
}

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

pragma solidity ^0.8.0;

/**
 * @dev External interface of AccessControl declared to support ERC165 detection.
 */
interface IAccessControl {
    /**
     * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
     *
     * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
     * {RoleAdminChanged} not being emitted signaling this.
     *
     * _Available since v3.1._
     */
    event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);

    /**
     * @dev Emitted when `account` is granted `role`.
     *
     * `sender` is the account that originated the contract call, an admin role
     * bearer except when using {AccessControl-_setupRole}.
     */
    event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Emitted when `account` is revoked `role`.
     *
     * `sender` is the account that originated the contract call:
     *   - if using `revokeRole`, it is the admin role bearer
     *   - if using `renounceRole`, it is the role bearer (i.e. `account`)
     */
    event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) external view returns (bool);

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {AccessControl-_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) external view returns (bytes32);

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function grantRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function revokeRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been granted `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `account`.
     */
    function renounceRole(bytes32 role, address account) external;
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/// @author: manifold.xyz

import "@openzeppelin/contracts/utils/introspection/IERC165.sol";

/**
 * Simple EIP2981 reference override implementation
 */
interface IEIP2981RoyaltyOverride is IERC165 {

    event TokenRoyaltyRemoved(uint256 tokenId);
    event TokenRoyaltySet(uint256 tokenId, address recipient, uint16 bps);
    event DefaultRoyaltySet(address recipient, uint16 bps);

    struct TokenRoyalty {
        address recipient;
        uint16 bps;
    }

    struct TokenRoyaltyConfig {
        uint256 tokenId;
        address recipient;
        uint16 bps;
    }

    /**
     * @dev Set per token royalties.  Passing a recipient of address(0) will delete any existing configuration
     */
    function setTokenRoyalties(TokenRoyaltyConfig[] calldata royalties) external;

    /**
     * @dev Get the number of token specific overrides.  Used to enumerate over all configurations
     */
    function getTokenRoyaltiesCount() external view returns(uint256);

    /**
     * @dev Get a token royalty configuration by index.  Use in conjunction with getTokenRoyaltiesCount to get all per token configurations
     */
    function getTokenRoyaltyByIndex(uint256 index) external view returns(TokenRoyaltyConfig memory);

    /**
     * @dev Set a default royalty configuration.  Will be used if no token specific configuration is set
     */
    function setDefaultRoyalty(TokenRoyalty calldata royalty) external;

}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/// @author: manifold.xyz

import "@openzeppelin/contracts/utils/introspection/ERC165.sol";
import "@openzeppelin/contracts/utils/structs/EnumerableSet.sol";

import "./IRoyaltyOverride.sol";
import "../specs/IEIP2981.sol";

/**
 * Simple EIP2981 reference override implementation
 */
abstract contract EIP2981RoyaltyOverrideCore is IEIP2981, IEIP2981RoyaltyOverride, ERC165 {
    using EnumerableSet for EnumerableSet.UintSet;

    TokenRoyalty public defaultRoyalty;
    mapping(uint256 => TokenRoyalty) private _tokenRoyalties;
    EnumerableSet.UintSet private _tokensWithRoyalties;

    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
        return interfaceId == type(IEIP2981).interfaceId || interfaceId == type(IEIP2981RoyaltyOverride).interfaceId || super.supportsInterface(interfaceId);
    }

    /**
     * @dev Sets token royalties. When you override this in the implementation contract
     * ensure that you access restrict it to the contract owner or admin
     */
    function _setTokenRoyalties(TokenRoyaltyConfig[] memory royaltyConfigs) internal {
        for (uint i = 0; i < royaltyConfigs.length; i++) {
            TokenRoyaltyConfig memory royaltyConfig = royaltyConfigs[i];
            require(royaltyConfig.bps < 10000, "Invalid bps");
            if (royaltyConfig.recipient == address(0)) {
                delete _tokenRoyalties[royaltyConfig.tokenId];
                _tokensWithRoyalties.remove(royaltyConfig.tokenId);
                emit TokenRoyaltyRemoved(royaltyConfig.tokenId);
            } else {
                _tokenRoyalties[royaltyConfig.tokenId] = TokenRoyalty(royaltyConfig.recipient, royaltyConfig.bps);
                _tokensWithRoyalties.add(royaltyConfig.tokenId);
                emit TokenRoyaltySet(royaltyConfig.tokenId, royaltyConfig.recipient, royaltyConfig.bps);
            }
        }
    }

    /**
     * @dev Sets default royalty. When you override this in the implementation contract
     * ensure that you access restrict it to the contract owner or admin
     */
    function _setDefaultRoyalty(TokenRoyalty memory royalty) internal {
        require(royalty.bps < 10000, "Invalid bps");
        defaultRoyalty = TokenRoyalty(royalty.recipient, royalty.bps);
        emit DefaultRoyaltySet(royalty.recipient, royalty.bps);
    }

    /**
     * @dev See {IEIP2981RoyaltyOverride-getTokenRoyaltiesCount}.
     */
    function getTokenRoyaltiesCount() external override view returns(uint256) {
        return _tokensWithRoyalties.length();
    }

    /**
     * @dev See {IEIP2981RoyaltyOverride-getTokenRoyaltyByIndex}.
     */
    function getTokenRoyaltyByIndex(uint256 index) external override view returns(TokenRoyaltyConfig memory) {
        uint256 tokenId = _tokensWithRoyalties.at(index);
        TokenRoyalty memory royalty = _tokenRoyalties[tokenId];
        return TokenRoyaltyConfig(tokenId, royalty.recipient, royalty.bps);
    }

    /**
     * @dev See {IEIP2981RoyaltyOverride-royaltyInfo}.
     */
    function royaltyInfo(uint256 tokenId, uint256 value) public override view returns (address, uint256) {
        if (_tokenRoyalties[tokenId].recipient != address(0)) {
            return (_tokenRoyalties[tokenId].recipient, value*_tokenRoyalties[tokenId].bps/10000);
        }
        if (defaultRoyalty.recipient != address(0) && defaultRoyalty.bps != 0) {
            return (defaultRoyalty.recipient, value*defaultRoyalty.bps/10000);
        }
        return (address(0), 0);
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.9;
pragma abicoder v2;

import "./LibPart.sol";

interface IRoyalties {
    function getRaribleV2Royalties(uint256 id)
        external
        view
        returns (LibPart.Part[] memory);
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.9;

library LibPart {
    bytes32 public constant TYPE_HASH =
        keccak256("Part(address account,uint96 value)");

    struct Part {
        address payable account;
        uint96 value;
    }

    function hash(Part memory part) internal pure returns (bytes32) {
        return keccak256(abi.encode(TYPE_HASH, part.account, part.value));
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.9;

library LibRoyaltiesV2 {
    /*
     * bytes4(keccak256('getRaribleV2Royalties(uint256)')) == 0xcad96cca
     */
    bytes4 constant _INTERFACE_ID_ROYALTIES = 0xcad96cca;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (utils/structs/EnumerableSet.sol)

pragma solidity ^0.8.0;

/**
 * @dev Library for managing
 * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
 * types.
 *
 * Sets have the following properties:
 *
 * - Elements are added, removed, and checked for existence in constant time
 * (O(1)).
 * - Elements are enumerated in O(n). No guarantees are made on the ordering.
 *
 * ```
 * contract Example {
 *     // Add the library methods
 *     using EnumerableSet for EnumerableSet.AddressSet;
 *
 *     // Declare a set state variable
 *     EnumerableSet.AddressSet private mySet;
 * }
 * ```
 *
 * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
 * and `uint256` (`UintSet`) are supported.
 */
library EnumerableSet {
    // To implement this library for multiple types with as little code
    // repetition as possible, we write it in terms of a generic Set type with
    // bytes32 values.
    // The Set implementation uses private functions, and user-facing
    // implementations (such as AddressSet) are just wrappers around the
    // underlying Set.
    // This means that we can only create new EnumerableSets for types that fit
    // in bytes32.

    struct Set {
        // Storage of set values
        bytes32[] _values;
        // Position of the value in the `values` array, plus 1 because index 0
        // means a value is not in the set.
        mapping(bytes32 => uint256) _indexes;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function _add(Set storage set, bytes32 value) private returns (bool) {
        if (!_contains(set, value)) {
            set._values.push(value);
            // The value is stored at length-1, but we add 1 to all indexes
            // and use 0 as a sentinel value
            set._indexes[value] = set._values.length;
            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function _remove(Set storage set, bytes32 value) private returns (bool) {
        // We read and store the value's index to prevent multiple reads from the same storage slot
        uint256 valueIndex = set._indexes[value];

        if (valueIndex != 0) {
            // Equivalent to contains(set, value)
            // To delete an element from the _values array in O(1), we swap the element to delete with the last one in
            // the array, and then remove the last element (sometimes called as 'swap and pop').
            // This modifies the order of the array, as noted in {at}.

            uint256 toDeleteIndex = valueIndex - 1;
            uint256 lastIndex = set._values.length - 1;

            if (lastIndex != toDeleteIndex) {
                bytes32 lastValue = set._values[lastIndex];

                // Move the last value to the index where the value to delete is
                set._values[toDeleteIndex] = lastValue;
                // Update the index for the moved value
                set._indexes[lastValue] = valueIndex; // Replace lastValue's index to valueIndex
            }

            // Delete the slot where the moved value was stored
            set._values.pop();

            // Delete the index for the deleted slot
            delete set._indexes[value];

            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function _contains(Set storage set, bytes32 value) private view returns (bool) {
        return set._indexes[value] != 0;
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function _length(Set storage set) private view returns (uint256) {
        return set._values.length;
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function _at(Set storage set, uint256 index) private view returns (bytes32) {
        return set._values[index];
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function _values(Set storage set) private view returns (bytes32[] memory) {
        return set._values;
    }

    // Bytes32Set

    struct Bytes32Set {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _add(set._inner, value);
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _remove(set._inner, value);
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
        return _contains(set._inner, value);
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(Bytes32Set storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
        return _at(set._inner, index);
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(Bytes32Set storage set) internal view returns (bytes32[] memory) {
        return _values(set._inner);
    }

    // AddressSet

    struct AddressSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(AddressSet storage set, address value) internal returns (bool) {
        return _add(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(AddressSet storage set, address value) internal returns (bool) {
        return _remove(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(AddressSet storage set, address value) internal view returns (bool) {
        return _contains(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(AddressSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(AddressSet storage set, uint256 index) internal view returns (address) {
        return address(uint160(uint256(_at(set._inner, index))));
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(AddressSet storage set) internal view returns (address[] memory) {
        bytes32[] memory store = _values(set._inner);
        address[] memory result;

        assembly {
            result := store
        }

        return result;
    }

    // UintSet

    struct UintSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(UintSet storage set, uint256 value) internal returns (bool) {
        return _add(set._inner, bytes32(value));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(UintSet storage set, uint256 value) internal returns (bool) {
        return _remove(set._inner, bytes32(value));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(UintSet storage set, uint256 value) internal view returns (bool) {
        return _contains(set._inner, bytes32(value));
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function length(UintSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(UintSet storage set, uint256 index) internal view returns (uint256) {
        return uint256(_at(set._inner, index));
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(UintSet storage set) internal view returns (uint256[] memory) {
        bytes32[] memory store = _values(set._inner);
        uint256[] memory result;

        assembly {
            result := store
        }

        return result;
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * EIP-2981
 */
interface IEIP2981 {
    /**
     * bytes4(keccak256("royaltyInfo(uint256,uint256)")) == 0x2a55205a
     *
     * => 0x2a55205a = 0x2a55205a
     */
    function royaltyInfo(uint256 tokenId, uint256 value) external view returns (address, uint256);
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.9;

contract OwnableDelegateProxy {}

contract ProxyRegistry {
    mapping(address => OwnableDelegateProxy) public proxies;
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity ^0.8.9;

import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/utils/cryptography/MerkleProof.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol";

import "./ERC721AutoIdMinterExtension.sol";

interface ERC721PreSaleExtensionInterface {
    function setPreSalePrice(uint256 newValue) external;

    function setPreSaleMaxMintPerWallet(uint256 newValue) external;

    function setAllowlistMerkleRoot(bytes32 newRoot) external;

    function togglePreSaleStatus(bool isActive) external;

    function onPreSaleAllowList(address minter, bytes32[] calldata proof)
        external
        view
        returns (bool);

    function mintPreSale(uint256 count, bytes32[] calldata proof)
        external
        payable;
}

/**
 * @dev Extension to provide pre-sale capabilities for certain collectors to mint for a specific price.
 */
abstract contract ERC721PreSaleExtension is
    ERC165Storage,
    ERC721AutoIdMinterExtension,
    ReentrancyGuard,
    ERC721PreSaleExtensionInterface
{
    uint256 public preSalePrice;
    uint256 public preSaleMaxMintPerWallet;
    bytes32 public preSaleAllowlistMerkleRoot;
    bool public preSaleStatus;

    mapping(address => uint256) internal preSaleAllowlistClaimed;

    constructor(uint256 _preSalePrice, uint256 _preSaleMaxMintPerWallet) {
        preSalePrice = _preSalePrice;
        preSaleMaxMintPerWallet = _preSaleMaxMintPerWallet;

        _registerInterface(type(ERC721PreSaleExtensionInterface).interfaceId);
    }

    // ADMIN

    function setPreSalePrice(uint256 newValue) external onlyOwner {
        preSalePrice = newValue;
    }

    function setPreSaleMaxMintPerWallet(uint256 newValue) external onlyOwner {
        preSaleMaxMintPerWallet = newValue;
    }

    function setAllowlistMerkleRoot(bytes32 newRoot) external onlyOwner {
        preSaleAllowlistMerkleRoot = newRoot;
    }

    function togglePreSaleStatus(bool isActive) external onlyOwner {
        preSaleStatus = isActive;
    }

    // PUBLIC

    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(ERC165Storage, ERC721AutoIdMinterExtension)
        returns (bool)
    {
        return ERC165Storage.supportsInterface(interfaceId);
    }

    function onPreSaleAllowList(address minter, bytes32[] calldata proof)
        external
        view
        returns (bool)
    {
        return
            MerkleProof.verify(
                proof,
                preSaleAllowlistMerkleRoot,
                _generateMerkleLeaf(minter)
            );
    }

    function mintPreSale(uint256 count, bytes32[] calldata proof)
        external
        payable
        nonReentrant
    {
        require(preSaleStatus, "PRE_SALE_NOT_ACTIVE");

        address to = _msgSender();

        require(
            MerkleProof.verify(
                proof,
                preSaleAllowlistMerkleRoot,
                _generateMerkleLeaf(to)
            ),
            "PRE_SALE_WRONG_PROOF"
        );
        require(
            preSaleAllowlistClaimed[to] + count <= preSaleMaxMintPerWallet,
            "PRE_SALE_LIMIT"
        );
        require(preSalePrice * count <= msg.value, "INSUFFICIENT_AMOUNT");

        preSaleAllowlistClaimed[to] += count;

        _mintTo(to, count);
    }

    // INTERNAL

    function _generateMerkleLeaf(address account)
        internal
        pure
        returns (bytes32)
    {
        return keccak256(abi.encodePacked(account));
    }
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity ^0.8.9;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol";

import "./ERC721AutoIdMinterExtension.sol";

interface ERC721PublicSaleExtensionInterface {
    function setPublicSalePrice(uint256 newValue) external;

    function setPublicSaleMaxMintPerTx(uint256 newValue) external;

    function togglePublicSaleStatus(bool isActive) external;

    function mintPublicSale(address to, uint256 count) external payable;
}

/**
 * @dev Extension to provide pre-sale and public-sale capabilities for colelctors to mint for a specific price.
 */
abstract contract ERC721PublicSaleExtension is
    Ownable,
    ERC165Storage,
    ERC721AutoIdMinterExtension,
    ReentrancyGuard,
    ERC721PublicSaleExtensionInterface
{
    uint256 public publicSalePrice;
    uint256 public publicSaleMaxMintPerTx;
    bool public publicSaleStatus;

    constructor(uint256 _publicSalePrice, uint256 _publicSaleMaxMintPerTx) {
        publicSalePrice = _publicSalePrice;
        publicSaleMaxMintPerTx = _publicSaleMaxMintPerTx;

        _registerInterface(
            type(ERC721PublicSaleExtensionInterface).interfaceId
        );
    }

    // ADMIN

    function setPublicSalePrice(uint256 newValue) external onlyOwner {
        publicSalePrice = newValue;
    }

    function setPublicSaleMaxMintPerTx(uint256 newValue) external onlyOwner {
        publicSaleMaxMintPerTx = newValue;
    }

    function togglePublicSaleStatus(bool isActive) external onlyOwner {
        publicSaleStatus = isActive;
    }

    // PUBLIC

    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(ERC165Storage, ERC721AutoIdMinterExtension)
        returns (bool)
    {
        return ERC165Storage.supportsInterface(interfaceId);
    }

    function mintPublicSale(address to, uint256 count)
        external
        payable
        nonReentrant
    {
        require(publicSaleStatus, "PRE_SALE_NOT_ACTIVE");
        require(count <= publicSaleMaxMintPerTx, "PUBLIC_SALE_LIMIT");
        require(publicSalePrice * count <= msg.value, "INSUFFICIENT_AMOUNT");

        _mintTo(to, count);
    }
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity ^0.8.9;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol";

interface ERC721SimpleProceedsExtensionInterface {
    function withdraw() external;
}

/**
 * @dev Extension to allow contract owner to withdraw all the funds directly.
 */
abstract contract ERC721SimpleProceedsExtension is
    Ownable,
    ERC165Storage,
    ERC721SimpleProceedsExtensionInterface
{
    constructor() {
        _registerInterface(
            type(ERC721SimpleProceedsExtensionInterface).interfaceId
        );
    }

    // ADMIN

    function withdraw() external onlyOwner {
        uint256 balance = address(this).balance;

        payable(this.owner()).transfer(balance);
    }

    // PUBLIC

    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(ERC165Storage)
        returns (bool)
    {
        return ERC165Storage.supportsInterface(interfaceId);
    }
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity ^0.8.9;

import "@openzeppelin/contracts/access/AccessControl.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol";

import "./ERC721AutoIdMinterExtension.sol";

interface ERC721RoleBasedMintExtensionInterface {
    function mintByRole(address to, uint256 count) external;
}

/**
 * @dev Extension to allow holders of a OpenZepplin-based role to mint directly.
 */
abstract contract ERC721RoleBasedMintExtension is
    ERC165Storage,
    ERC721AutoIdMinterExtension,
    AccessControl,
    ERC721RoleBasedMintExtensionInterface
{
    bytes32 public constant MINTER_ROLE = keccak256("MINTER_ROLE");

    constructor() {
        _registerInterface(
            type(ERC721RoleBasedMintExtensionInterface).interfaceId
        );
    }

    // ADMIN

    function mintByRole(address to, uint256 count) external {
        require(hasRole(MINTER_ROLE, _msgSender()), "NOT_MINTER_ROLE");

        _mintTo(to, count);
    }

    // PUBLIC

    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(ERC165Storage, AccessControl, ERC721AutoIdMinterExtension)
        returns (bool)
    {
        return ERC165Storage.supportsInterface(interfaceId);
    }
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity ^0.8.9;

import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol";

interface ERC721BulkifyExtensionInterface {
    function transferFromBulk(
        address from,
        address to,
        uint256[] memory tokenIds
    ) external;
}

/**
 * @dev Extension to add bulk operations to a standard ERC721 contract.
 */
abstract contract ERC721BulkifyExtension is
    Context,
    ERC165Storage,
    ERC721,
    ERC721BulkifyExtensionInterface
{
    constructor() {
        _registerInterface(type(ERC721BulkifyExtensionInterface).interfaceId);
    }

    // PUBLIC

    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(ERC165Storage, ERC721)
        returns (bool)
    {
        return ERC165Storage.supportsInterface(interfaceId);
    }

    /**
     * Useful for when user wants to return tokens to get a refund,
     * or when they want to transfer lots of tokens by paying gas fee only once.
     */
    function transferFromBulk(
        address from,
        address to,
        uint256[] memory tokenIds
    ) public virtual {
        for (uint256 i = 0; i < tokenIds.length; i++) {
            require(_isApprovedOrOwner(_msgSender(), tokenIds[i]), "NOT_OWNER");
            _transfer(from, to, tokenIds[i]);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        // On the first call to nonReentrant, _notEntered will be true
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

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

        _;

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (utils/cryptography/MerkleProof.sol)

pragma solidity ^0.8.0;

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

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

    function _efficientHash(bytes32 a, bytes32 b) private pure returns (bytes32 value) {
        assembly {
            mstore(0x00, a)
            mstore(0x20, b)
            value := keccak256(0x00, 0x40)
        }
    }
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity ^0.8.9;

import "@openzeppelin/contracts/access/AccessControl.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol";
import "@openzeppelin/contracts/security/Pausable.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/extensions/ERC20Burnable.sol";

import "../extensions/ERC20RoleBasedLockingExtension.sol";

contract ERC20LockableToken is
    ERC165Storage,
    AccessControl,
    ERC20,
    ERC20Burnable,
    Pausable,
    ERC20RoleBasedLockingExtension
{
    bytes32 public constant PAUSER_ROLE = keccak256("PAUSER_ROLE");
    bytes32 public constant MINTER_ROLE = keccak256("MINTER_ROLE");

    struct Config {
        string name;
        string symbol;
    }

    constructor(Config memory config) ERC20(config.name, config.symbol) {
        _grantRole(DEFAULT_ADMIN_ROLE, msg.sender);
        _grantRole(PAUSER_ROLE, msg.sender);
        _grantRole(MINTER_ROLE, msg.sender);
    }

    // ADMIN

    function pause() public onlyRole(PAUSER_ROLE) {
        _pause();
    }

    function unpause() public onlyRole(PAUSER_ROLE) {
        _unpause();
    }

    function mint(address to, uint256 amount) public onlyRole(MINTER_ROLE) {
        _mint(to, amount);
    }

    // PUBLIC

    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(ERC165Storage, AccessControl, ERC20RoleBasedLockingExtension)
        returns (bool)
    {
        return ERC165Storage.supportsInterface(interfaceId);
    }

    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount
    )
        internal
        virtual
        override(ERC20, ERC20RoleBasedLockingExtension)
        whenNotPaused
    {
        ERC20RoleBasedLockingExtension._beforeTokenTransfer(from, to, amount);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (security/Pausable.sol)

pragma solidity ^0.8.0;

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

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

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

    bool private _paused;

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

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

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/ERC20.sol)

pragma solidity ^0.8.0;

import "./IERC20.sol";
import "./extensions/IERC20Metadata.sol";
import "../../utils/Context.sol";

/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20PresetMinterPauser}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * We have followed general OpenZeppelin Contracts guidelines: functions revert
 * instead returning `false` on failure. This behavior is nonetheless
 * conventional and does not conflict with the expectations of ERC20
 * applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
contract ERC20 is Context, IERC20, IERC20Metadata {
    mapping(address => uint256) private _balances;

    mapping(address => mapping(address => uint256)) private _allowances;

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

    /**
     * @dev Sets the values for {name} and {symbol}.
     *
     * The default value of {decimals} is 18. To select a different value for
     * {decimals} you should overload it.
     *
     * All two of these values are immutable: they can only be set once during
     * construction.
     */
    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

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

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5.05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the value {ERC20} uses, unless this function is
     * overridden;
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view virtual override returns (uint8) {
        return 18;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view virtual override returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address to, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _transfer(owner, to, amount);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on
     * `transferFrom`. This is semantically equivalent to an infinite approval.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * NOTE: Does not update the allowance if the current allowance
     * is the maximum `uint256`.
     *
     * Requirements:
     *
     * - `from` and `to` cannot be the zero address.
     * - `from` must have a balance of at least `amount`.
     * - the caller must have allowance for ``from``'s tokens of at least
     * `amount`.
     */
    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) public virtual override returns (bool) {
        address spender = _msgSender();
        _spendAllowance(from, spender, amount);
        _transfer(from, to, amount);
        return true;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, allowance(owner, spender) + addedValue);
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        address owner = _msgSender();
        uint256 currentAllowance = allowance(owner, spender);
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        unchecked {
            _approve(owner, spender, currentAllowance - subtractedValue);
        }

        return true;
    }

    /**
     * @dev Moves `amount` of tokens from `sender` to `recipient`.
     *
     * This internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `from` must have a balance of at least `amount`.
     */
    function _transfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {
        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(from, to, amount);

        uint256 fromBalance = _balances[from];
        require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
        unchecked {
            _balances[from] = fromBalance - amount;
        }
        _balances[to] += amount;

        emit Transfer(from, to, amount);

        _afterTokenTransfer(from, to, amount);
    }

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _beforeTokenTransfer(address(0), account, amount);

        _totalSupply += amount;
        _balances[account] += amount;
        emit Transfer(address(0), account, amount);

        _afterTokenTransfer(address(0), account, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        uint256 accountBalance = _balances[account];
        require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
        unchecked {
            _balances[account] = accountBalance - amount;
        }
        _totalSupply -= amount;

        emit Transfer(account, address(0), amount);

        _afterTokenTransfer(account, address(0), amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    /**
     * @dev Updates `owner` s allowance for `spender` based on spent `amount`.
     *
     * Does not update the allowance amount in case of infinite allowance.
     * Revert if not enough allowance is available.
     *
     * Might emit an {Approval} event.
     */
    function _spendAllowance(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        uint256 currentAllowance = allowance(owner, spender);
        if (currentAllowance != type(uint256).max) {
            require(currentAllowance >= amount, "ERC20: insufficient allowance");
            unchecked {
                _approve(owner, spender, currentAllowance - amount);
            }
        }
    }

    /**
     * @dev Hook that is called before any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * will be transferred to `to`.
     * - when `from` is zero, `amount` tokens will be minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}

    /**
     * @dev Hook that is called after any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * has been transferred to `to`.
     * - when `from` is zero, `amount` tokens have been minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens have been burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _afterTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}
}

// 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 v4.5.0) (token/ERC20/extensions/ERC20Burnable.sol)

pragma solidity ^0.8.0;

import "../ERC20.sol";
import "../../../utils/Context.sol";

/**
 * @dev Extension of {ERC20} that allows token holders to destroy both their own
 * tokens and those that they have an allowance for, in a way that can be
 * recognized off-chain (via event analysis).
 */
abstract contract ERC20Burnable is Context, ERC20 {
    /**
     * @dev Destroys `amount` tokens from the caller.
     *
     * See {ERC20-_burn}.
     */
    function burn(uint256 amount) public virtual {
        _burn(_msgSender(), amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, deducting from the caller's
     * allowance.
     *
     * See {ERC20-_burn} and {ERC20-allowance}.
     *
     * Requirements:
     *
     * - the caller must have allowance for ``accounts``'s tokens of at least
     * `amount`.
     */
    function burnFrom(address account, uint256 amount) public virtual {
        _spendAllowance(account, _msgSender(), amount);
        _burn(account, amount);
    }
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity ^0.8.9;

import "@openzeppelin/contracts/access/AccessControl.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";

interface ERC20RoleBasedLockingExtensionInterface {
    function lockForAll() external;

    function unlockForAll() external;

    function canTransfer(address) external view returns (bool);
}

/**
 * @dev Extension to allow locking transfers and only allow certain addresses do to transfers.
 */
abstract contract ERC20RoleBasedLockingExtension is
    ERC165Storage,
    AccessControl,
    ERC20,
    ERC20RoleBasedLockingExtensionInterface
{
    bytes32 public constant TRANSFER_ROLE = keccak256("TRANSFER_ROLE");

    constructor() {
        _registerInterface(
            type(ERC20RoleBasedLockingExtensionInterface).interfaceId
        );

        _grantRole(TRANSFER_ROLE, msg.sender);
    }

    // ADMIN

    function lockForAll() external {
        require(hasRole(DEFAULT_ADMIN_ROLE, _msgSender()), "NOT_ADMIN");

        _revokeRole(TRANSFER_ROLE, address(0));
    }

    function unlockForAll() external {
        require(hasRole(DEFAULT_ADMIN_ROLE, _msgSender()), "NOT_ADMIN");

        _grantRole(TRANSFER_ROLE, address(0));
    }

    // PUBLIC

    function canTransfer(address operator)
        external
        view
        override
        returns (bool)
    {
        return hasRole(TRANSFER_ROLE, operator);
    }

    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(ERC165Storage, AccessControl)
        returns (bool)
    {
        return ERC165Storage.supportsInterface(interfaceId);
    }

    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual override {
        require(
            hasRole(TRANSFER_ROLE, address(0)) ||
                hasRole(TRANSFER_ROLE, _msgSender()),
            "TRANSFER_LOCKED"
        );

        super._beforeTokenTransfer(from, to, amount);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";

/**
 * @dev Interface for the optional metadata functions from the ERC20 standard.
 *
 * _Available since v4.1._
 */
interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

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

    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity ^0.8.9;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/token/ERC20/extensions/ERC20Burnable.sol";
import "@openzeppelin/contracts/security/Pausable.sol";
import "@openzeppelin/contracts/access/AccessControl.sol";

contract ERC20BasicToken is ERC20, ERC20Burnable, Pausable, AccessControl {
    bytes32 public constant PAUSER_ROLE = keccak256("PAUSER_ROLE");
    bytes32 public constant MINTER_ROLE = keccak256("MINTER_ROLE");

    struct Config {
        string name;
        string symbol;
    }

    constructor(Config memory config) ERC20(config.name, config.symbol) {
        _grantRole(DEFAULT_ADMIN_ROLE, msg.sender);
        _grantRole(PAUSER_ROLE, msg.sender);
        _grantRole(MINTER_ROLE, msg.sender);
    }

    function pause() public onlyRole(PAUSER_ROLE) {
        _pause();
    }

    function unpause() public onlyRole(PAUSER_ROLE) {
        _unpause();
    }

    function mint(address to, uint256 amount) public onlyRole(MINTER_ROLE) {
        _mint(to, amount);
    }

    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal override whenNotPaused {
        super._beforeTokenTransfer(from, to, amount);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/extensions/IERC721Enumerable.sol)

pragma solidity ^0.8.0;

import "../IERC721.sol";

/**
 * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721Enumerable is IERC721 {
    /**
     * @dev Returns the total amount of tokens stored by the contract.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns a token ID owned by `owner` at a given `index` of its token list.
     * Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
     */
    function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256);

    /**
     * @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
     * Use along with {totalSupply} to enumerate all tokens.
     */
    function tokenByIndex(uint256 index) external view returns (uint256);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/ERC721Enumerable.sol)

pragma solidity ^0.8.0;

import "../ERC721.sol";
import "./IERC721Enumerable.sol";

/**
 * @dev This implements an optional extension of {ERC721} defined in the EIP that adds
 * enumerability of all the token ids in the contract as well as all token ids owned by each
 * account.
 */
abstract contract ERC721Enumerable is ERC721, IERC721Enumerable {
    // Mapping from owner to list of owned token IDs
    mapping(address => mapping(uint256 => uint256)) private _ownedTokens;

    // Mapping from token ID to index of the owner tokens list
    mapping(uint256 => uint256) private _ownedTokensIndex;

    // Array with all token ids, used for enumeration
    uint256[] private _allTokens;

    // Mapping from token id to position in the allTokens array
    mapping(uint256 => uint256) private _allTokensIndex;

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC721) returns (bool) {
        return interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId);
    }

    /**
     * @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
     */
    function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) {
        require(index < ERC721.balanceOf(owner), "ERC721Enumerable: owner index out of bounds");
        return _ownedTokens[owner][index];
    }

    /**
     * @dev See {IERC721Enumerable-totalSupply}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        return _allTokens.length;
    }

    /**
     * @dev See {IERC721Enumerable-tokenByIndex}.
     */
    function tokenByIndex(uint256 index) public view virtual override returns (uint256) {
        require(index < ERC721Enumerable.totalSupply(), "ERC721Enumerable: global index out of bounds");
        return _allTokens[index];
    }

    /**
     * @dev Hook that is called before any token transfer. This includes minting
     * and burning.
     *
     * 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, ``from``'s `tokenId` will be burned.
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 tokenId
    ) internal virtual override {
        super._beforeTokenTransfer(from, to, tokenId);

        if (from == address(0)) {
            _addTokenToAllTokensEnumeration(tokenId);
        } else if (from != to) {
            _removeTokenFromOwnerEnumeration(from, tokenId);
        }
        if (to == address(0)) {
            _removeTokenFromAllTokensEnumeration(tokenId);
        } else if (to != from) {
            _addTokenToOwnerEnumeration(to, tokenId);
        }
    }

    /**
     * @dev Private function to add a token to this extension's ownership-tracking data structures.
     * @param to address representing the new owner of the given token ID
     * @param tokenId uint256 ID of the token to be added to the tokens list of the given address
     */
    function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private {
        uint256 length = ERC721.balanceOf(to);
        _ownedTokens[to][length] = tokenId;
        _ownedTokensIndex[tokenId] = length;
    }

    /**
     * @dev Private function to add a token to this extension's token tracking data structures.
     * @param tokenId uint256 ID of the token to be added to the tokens list
     */
    function _addTokenToAllTokensEnumeration(uint256 tokenId) private {
        _allTokensIndex[tokenId] = _allTokens.length;
        _allTokens.push(tokenId);
    }

    /**
     * @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that
     * while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for
     * gas optimizations e.g. when performing a transfer operation (avoiding double writes).
     * This has O(1) time complexity, but alters the order of the _ownedTokens array.
     * @param from address representing the previous owner of the given token ID
     * @param tokenId uint256 ID of the token to be removed from the tokens list of the given address
     */
    function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private {
        // To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and
        // then delete the last slot (swap and pop).

        uint256 lastTokenIndex = ERC721.balanceOf(from) - 1;
        uint256 tokenIndex = _ownedTokensIndex[tokenId];

        // When the token to delete is the last token, the swap operation is unnecessary
        if (tokenIndex != lastTokenIndex) {
            uint256 lastTokenId = _ownedTokens[from][lastTokenIndex];

            _ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
            _ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
        }

        // This also deletes the contents at the last position of the array
        delete _ownedTokensIndex[tokenId];
        delete _ownedTokens[from][lastTokenIndex];
    }

    /**
     * @dev Private function to remove a token from this extension's token tracking data structures.
     * This has O(1) time complexity, but alters the order of the _allTokens array.
     * @param tokenId uint256 ID of the token to be removed from the tokens list
     */
    function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private {
        // To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and
        // then delete the last slot (swap and pop).

        uint256 lastTokenIndex = _allTokens.length - 1;
        uint256 tokenIndex = _allTokensIndex[tokenId];

        // When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so
        // rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding
        // an 'if' statement (like in _removeTokenFromOwnerEnumeration)
        uint256 lastTokenId = _allTokens[lastTokenIndex];

        _allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
        _allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index

        // This also deletes the contents at the last position of the array
        delete _allTokensIndex[tokenId];
        _allTokens.pop();
    }
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity ^0.8.9;

import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";

contract TestERC721 is ERC721("FlairTest", "FTS"), ERC721Enumerable {
    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(ERC721, ERC721Enumerable)
        returns (bool)
    {
        return super.supportsInterface(interfaceId);
    }

    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 tokenId
    ) internal virtual override(ERC721, ERC721Enumerable) {
        return super._beforeTokenTransfer(from, to, tokenId);
    }

    function mintExact(address to, uint256 tokenId) public returns (bool) {
        _mint(to, tokenId);
        return true;
    }

    function mintBulk(address to, uint256 total) public returns (bool) {
        for (uint256 i = 0; i < total; i++) {
            _mint(to, totalSupply());
        }
        return true;
    }
}

// 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 (utils/cryptography/draft-EIP712.sol)

pragma solidity ^0.8.0;

import "./ECDSA.sol";

/**
 * @dev https://eips.ethereum.org/EIPS/eip-712[EIP 712] is a standard for hashing and signing of typed structured data.
 *
 * The encoding specified in the EIP is very generic, and such a generic implementation in Solidity is not feasible,
 * thus this contract does not implement the encoding itself. Protocols need to implement the type-specific encoding
 * they need in their contracts using a combination of `abi.encode` and `keccak256`.
 *
 * This contract implements the EIP 712 domain separator ({_domainSeparatorV4}) that is used as part of the encoding
 * scheme, and the final step of the encoding to obtain the message digest that is then signed via ECDSA
 * ({_hashTypedDataV4}).
 *
 * The implementation of the domain separator was designed to be as efficient as possible while still properly updating
 * the chain id to protect against replay attacks on an eventual fork of the chain.
 *
 * NOTE: This contract implements the version of the encoding known as "v4", as implemented by the JSON RPC method
 * https://docs.metamask.io/guide/signing-data.html[`eth_signTypedDataV4` in MetaMask].
 *
 * _Available since v3.4._
 */
abstract contract EIP712 {
    /* solhint-disable var-name-mixedcase */
    // Cache the domain separator as an immutable value, but also store the chain id that it corresponds to, in order to
    // invalidate the cached domain separator if the chain id changes.
    bytes32 private immutable _CACHED_DOMAIN_SEPARATOR;
    uint256 private immutable _CACHED_CHAIN_ID;
    address private immutable _CACHED_THIS;

    bytes32 private immutable _HASHED_NAME;
    bytes32 private immutable _HASHED_VERSION;
    bytes32 private immutable _TYPE_HASH;

    /* solhint-enable var-name-mixedcase */

    /**
     * @dev Initializes the domain separator and parameter caches.
     *
     * The meaning of `name` and `version` is specified in
     * https://eips.ethereum.org/EIPS/eip-712#definition-of-domainseparator[EIP 712]:
     *
     * - `name`: the user readable name of the signing domain, i.e. the name of the DApp or the protocol.
     * - `version`: the current major version of the signing domain.
     *
     * NOTE: These parameters cannot be changed except through a xref:learn::upgrading-smart-contracts.adoc[smart
     * contract upgrade].
     */
    constructor(string memory name, string memory version) {
        bytes32 hashedName = keccak256(bytes(name));
        bytes32 hashedVersion = keccak256(bytes(version));
        bytes32 typeHash = keccak256(
            "EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"
        );
        _HASHED_NAME = hashedName;
        _HASHED_VERSION = hashedVersion;
        _CACHED_CHAIN_ID = block.chainid;
        _CACHED_DOMAIN_SEPARATOR = _buildDomainSeparator(typeHash, hashedName, hashedVersion);
        _CACHED_THIS = address(this);
        _TYPE_HASH = typeHash;
    }

    /**
     * @dev Returns the domain separator for the current chain.
     */
    function _domainSeparatorV4() internal view returns (bytes32) {
        if (address(this) == _CACHED_THIS && block.chainid == _CACHED_CHAIN_ID) {
            return _CACHED_DOMAIN_SEPARATOR;
        } else {
            return _buildDomainSeparator(_TYPE_HASH, _HASHED_NAME, _HASHED_VERSION);
        }
    }

    function _buildDomainSeparator(
        bytes32 typeHash,
        bytes32 nameHash,
        bytes32 versionHash
    ) private view returns (bytes32) {
        return keccak256(abi.encode(typeHash, nameHash, versionHash, block.chainid, address(this)));
    }

    /**
     * @dev Given an already https://eips.ethereum.org/EIPS/eip-712#definition-of-hashstruct[hashed struct], this
     * function returns the hash of the fully encoded EIP712 message for this domain.
     *
     * This hash can be used together with {ECDSA-recover} to obtain the signer of a message. For example:
     *
     * ```solidity
     * bytes32 digest = _hashTypedDataV4(keccak256(abi.encode(
     *     keccak256("Mail(address to,string contents)"),
     *     mailTo,
     *     keccak256(bytes(mailContents))
     * )));
     * address signer = ECDSA.recover(digest, signature);
     * ```
     */
    function _hashTypedDataV4(bytes32 structHash) internal view virtual returns (bytes32) {
        return ECDSA.toTypedDataHash(_domainSeparatorV4(), structHash);
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.9;

import {SafeMath} from "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/utils/cryptography/draft-EIP712.sol";
import "@openzeppelin/contracts/utils/Context.sol";

abstract contract NativeMetaTransaction is Context, EIP712 {
    using SafeMath for uint256;

    bytes32 private constant META_TRANSACTION_TYPEHASH =
        keccak256(
            bytes(
                "MetaTransaction(uint256 nonce,address from,bytes functionSignature)"
            )
        );

    event MetaTransactionExecuted(
        address userAddress,
        address payable relayerAddress,
        bytes functionSignature
    );

    mapping(address => uint256) nonces;

    /*
     * Meta transaction structure.
     * No point of including value field here as if user is doing value transfer then he has the funds to pay for gas
     * He should call the desired function directly in that case.
     */
    struct MetaTransaction {
        uint256 nonce;
        address from;
        bytes functionSignature;
    }

    function _msgSender() internal view override returns (address sender) {
        if (msg.sender == address(this)) {
            bytes memory array = msg.data;
            uint256 index = msg.data.length;
            assembly {
                // Load the 32 bytes word from memory with the address on the lower 20 bytes, and mask those.
                sender := and(
                    mload(add(array, index)),
                    0xffffffffffffffffffffffffffffffffffffffff
                )
            }
        } else {
            sender = msg.sender;
        }

        return sender;
    }

    function executeMetaTransaction(
        address userAddress,
        bytes memory functionSignature,
        bytes32 sigR,
        bytes32 sigS,
        uint8 sigV
    ) public payable returns (bytes memory) {
        MetaTransaction memory metaTx = MetaTransaction({
            nonce: nonces[userAddress],
            from: userAddress,
            functionSignature: functionSignature
        });

        require(
            verify(userAddress, metaTx, sigR, sigS, sigV),
            "Signer and signature do not match"
        );

        // increase nonce for user (to avoid re-use)
        nonces[userAddress] = nonces[userAddress].add(1);

        emit MetaTransactionExecuted(
            userAddress,
            payable(msg.sender),
            functionSignature
        );

        // Append userAddress and relayer address at the end to extract it from calling context
        (bool success, bytes memory returnData) = address(this).call(
            abi.encodePacked(functionSignature, userAddress)
        );

        require(success, "Function call not successful");

        return returnData;
    }

    function hashMetaTransaction(MetaTransaction memory metaTx)
        internal
        pure
        returns (bytes32)
    {
        return
            keccak256(
                abi.encode(
                    META_TRANSACTION_TYPEHASH,
                    metaTx.nonce,
                    metaTx.from,
                    keccak256(metaTx.functionSignature)
                )
            );
    }

    function getNonce(address user) public view returns (uint256 nonce) {
        nonce = nonces[user];
    }

    function verify(
        address signer,
        MetaTransaction memory metaTx,
        bytes32 sigR,
        bytes32 sigS,
        uint8 sigV
    ) internal view returns (bool) {
        require(signer != address(0), "NativeMetaTransaction: INVALID_SIGNER");
        return
            signer ==
            ecrecover(
                _hashTypedDataV4(hashMetaTransaction(metaTx)),
                sigV,
                sigR,
                sigS
            );
    }
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity ^0.8.9;

import "@openzeppelin/contracts/utils/Context.sol";
import "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
import "@openzeppelin/contracts/utils/cryptography/draft-EIP712.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";

contract UnorderedForwarder is EIP712, ReentrancyGuard {
    using ECDSA for bytes32;

    struct MetaTransaction {
        address from;
        address to;
        uint256 value;
        uint256 minGasPrice;
        uint256 maxGasPrice;
        uint256 expiresAt;
        uint256 nonce;
        bytes data;
    }

    bytes32 private constant _TYPEHASH =
        keccak256(
            "MetaTransaction(address from,address to,uint256 value,uint256 minGasPrice,uint256 maxGasPrice,uint256 expiresAt,uint256 nonce,bytes data)"
        );

    mapping(bytes32 => uint256) mtxHashToExecutedBlockNumber;

    constructor() EIP712("UnorderedForwarder", "0.0.1") {}

    /// @dev Refunds up to `msg.value` leftover ETH at the end of the call.
    modifier refundsAttachedEth() {
        _;
        uint256 remainingBalance = msg.value > address(this).balance
            ? address(this).balance
            : msg.value;
        if (remainingBalance > 0) {
            payable(msg.sender).transfer(remainingBalance);
        }
    }

    /// @dev Ensures that the ETH balance of `this` does not go below the
    ///      initial ETH balance before the call (excluding ETH attached to the call).
    modifier doesNotReduceEthBalance() {
        uint256 initialBalance = address(this).balance - msg.value;
        _;
        require(initialBalance <= address(this).balance, "FWD_ETH_LEAK");
    }

    function verify(MetaTransaction calldata mtx, bytes calldata signature)
        public
        view
        returns (bytes32 mtxHash)
    {
        mtxHash = _hashTypedDataV4(
            keccak256(
                abi.encode(
                    _TYPEHASH,
                    mtx.from,
                    mtx.to,
                    mtx.value,
                    mtx.minGasPrice,
                    mtx.maxGasPrice,
                    mtx.expiresAt,
                    mtx.nonce,
                    keccak256(mtx.data)
                )
            )
        );

        // Must not be expired.
        require(mtx.expiresAt > block.timestamp, "FWD_EXPIRED");

        // Must be signed by the signer.
        require(
            mtxHash.recover(signature) == mtx.from,
            "FWD_INVALID_SIGNATURE"
        );

        // Transaction must not have been already executed.
        require(mtxHashToExecutedBlockNumber[mtxHash] == 0, "FWD_REPLAYED");

        return mtxHash;
    }

    function execute(MetaTransaction calldata mtx, bytes calldata signature)
        public
        payable
        nonReentrant
        doesNotReduceEthBalance
        refundsAttachedEth
        returns (bytes memory)
    {
        return _execute(mtx, signature);
    }

    function batchExecute(
        MetaTransaction[] calldata mtxs,
        bytes[] calldata signatures
    )
        public
        payable
        nonReentrant
        doesNotReduceEthBalance
        refundsAttachedEth
        returns (bytes[] memory returnResults)
    {
        require(mtxs.length == signatures.length, "FWD_MISMATCH_SIGNATURES");

        returnResults = new bytes[](mtxs.length);

        for (uint256 i = 0; i < mtxs.length; ++i) {
            returnResults[i] = _execute(mtxs[i], signatures[i]);
        }
    }

    function _execute(MetaTransaction calldata mtx, bytes calldata signature)
        internal
        returns (bytes memory)
    {
        // Must have a valid gas price.
        require(
            mtx.minGasPrice <= tx.gasprice && tx.gasprice <= mtx.maxGasPrice,
            "FWD_INVALID_GAS"
        );

        // Must have enough ETH.
        require(mtx.value <= address(this).balance, "FWD_INVALID_VALUE");

        bytes32 mtxHash = verify(mtx, signature);

        mtxHashToExecutedBlockNumber[mtxHash] = block.number;

        (bool success, bytes memory returndata) = mtx.to.call{value: mtx.value}(
            abi.encodePacked(mtx.data, mtx.from)
        );

        require(success, "FWD_CALL_FAILED");

        return returndata;
    }
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity ^0.8.9;

import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/Counters.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts/proxy/utils/Initializable.sol";

import "../core/ERC721BaseDistributor.sol";

contract ERC721HolderVestedDistributor is
    Ownable,
    Initializable,
    ERC721BaseDistributor
{
    using Address for address;
    using Address for address payable;

    string public constant name = "ERC721 Vested Distributor";

    string public constant version = "0.1";

    struct Config {
        address claimToken;
        address ticketToken;
        uint256 vestingRate;
        uint256 vestingTimeUnit;
        uint256 claimStart;
        uint256 claimEnd;
    }

    uint256 public vestingRate;
    uint256 public vestingTimeUnit;
    uint256 public claimStart;
    uint256 public claimEnd;

    /* INTERNAL */

    constructor(Config memory config) {
        initialize(msg.sender, config);
    }

    // To enable factory cloning
    function initialize(address owner, Config memory config)
        public
        initializer
    {
        Ownable._transferOwnership(owner);
        ERC721BaseDistributor._setup(config.claimToken, config.ticketToken);

        vestingRate = config.vestingRate;
        vestingTimeUnit = config.vestingTimeUnit;
        claimStart = config.claimStart;
        claimEnd = config.claimEnd;
    }

    /* PUBLIC */

    function setVestingRate(uint256 newValue) public onlyOwner {
        vestingRate = newValue;
    }

    function setVestingTimeUnit(uint256 newValue) public onlyOwner {
        vestingTimeUnit = newValue;
    }

    function setClaimStart(uint256 newValue) public onlyOwner {
        claimStart = newValue;
    }

    function setClaimEnd(uint256 newValue) public onlyOwner {
        claimEnd = newValue;
    }

    function _beforeClaim(uint256 ticketTokenId) internal view override {
        require(claimStart < block.timestamp, "DISTRIBUTOR/NOT_STARTED");

        require(
            entitlements[ticketTokenId].lastClaimedAt <
                block.timestamp - vestingTimeUnit,
            "DISTRIBUTOR/TOO_EARLY"
        );
    }

    function getTotalReleasedBulk(uint256[] calldata ticketTokenIds)
        public
        view
        returns (uint256)
    {
        uint256 totalReleased = 0;

        for (uint256 i = 0; i < ticketTokenIds.length; i++) {
            totalReleased += calculateReleasedAmount(ticketTokenIds[i]);
        }

        return totalReleased;
    }

    function calculateClaimableAmount(uint256 ticketTokenId)
        public
        view
        override
        returns (uint256 claimableAmount)
    {
        claimableAmount =
            calculateClaimableAmountUntil(
                claimEnd > 0 && block.timestamp > claimEnd
                    ? claimEnd
                    : block.timestamp
            ) -
            entitlements[ticketTokenId].totalClaimed;
    }

    function calculateClaimableAmountUntil(uint256 calcUntil)
        public
        view
        returns (uint256)
    {
        if (calcUntil < claimStart) {
            return 0;
        }

        return
            vestingRate *
            // Intentionally rounded down:
            ((calcUntil - claimStart) / vestingTimeUnit);
    }

    function calculateReleasedAmount(uint256 ticketTokenId)
        public
        view
        returns (uint256 releasedAmount)
    {
        releasedAmount =
            calculateReleasedAmountUntil(
                claimEnd > 0 && block.timestamp > claimEnd
                    ? claimEnd
                    : block.timestamp
            ) -
            entitlements[ticketTokenId].totalClaimed;
    }

    function calculateReleasedAmountUntil(uint256 calcUntil)
        public
        view
        returns (uint256)
    {
        return ((calcUntil - claimStart) * vestingRate) / vestingTimeUnit;
    }
}

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

pragma solidity ^0.8.0;

/**
 * @title Counters
 * @author Matt Condon (@shrugs)
 * @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number
 * of elements in a mapping, issuing ERC721 ids, or counting request ids.
 *
 * Include with `using Counters for Counters.Counter;`
 */
library Counters {
    struct Counter {
        // This variable should never be directly accessed by users of the library: interactions must be restricted to
        // the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
        // this feature: see https://github.com/ethereum/solidity/issues/4637
        uint256 _value; // default: 0
    }

    function current(Counter storage counter) internal view returns (uint256) {
        return counter._value;
    }

    function increment(Counter storage counter) internal {
        unchecked {
            counter._value += 1;
        }
    }

    function decrement(Counter storage counter) internal {
        uint256 value = counter._value;
        require(value > 0, "Counter: decrement overflow");
        unchecked {
            counter._value = value - 1;
        }
    }

    function reset(Counter storage counter) internal {
        counter._value = 0;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (proxy/utils/Initializable.sol)

pragma solidity ^0.8.2;

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

/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 *
 * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be
 * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in
 * case an upgrade adds a module that needs to be initialized.
 *
 * For example:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * contract MyToken is ERC20Upgradeable {
 *     function initialize() initializer public {
 *         __ERC20_init("MyToken", "MTK");
 *     }
 * }
 * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {
 *     function initializeV2() reinitializer(2) public {
 *         __ERC20Permit_init("MyToken");
 *     }
 * }
 * ```
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 *
 * [CAUTION]
 * ====
 * Avoid leaving a contract uninitialized.
 *
 * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
 * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke
 * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * /// @custom:oz-upgrades-unsafe-allow constructor
 * constructor() {
 *     _disableInitializers();
 * }
 * ```
 * ====
 */
abstract contract Initializable {
    /**
     * @dev Indicates that the contract has been initialized.
     * @custom:oz-retyped-from bool
     */
    uint8 private _initialized;

    /**
     * @dev Indicates that the contract is in the process of being initialized.
     */
    bool private _initializing;

    /**
     * @dev Triggered when the contract has been initialized or reinitialized.
     */
    event Initialized(uint8 version);

    /**
     * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,
     * `onlyInitializing` functions can be used to initialize parent contracts. Equivalent to `reinitializer(1)`.
     */
    modifier initializer() {
        bool isTopLevelCall = _setInitializedVersion(1);
        if (isTopLevelCall) {
            _initializing = true;
        }
        _;
        if (isTopLevelCall) {
            _initializing = false;
            emit Initialized(1);
        }
    }

    /**
     * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the
     * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be
     * used to initialize parent contracts.
     *
     * `initializer` is equivalent to `reinitializer(1)`, so a reinitializer may be used after the original
     * initialization step. This is essential to configure modules that are added through upgrades and that require
     * initialization.
     *
     * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in
     * a contract, executing them in the right order is up to the developer or operator.
     */
    modifier reinitializer(uint8 version) {
        bool isTopLevelCall = _setInitializedVersion(version);
        if (isTopLevelCall) {
            _initializing = true;
        }
        _;
        if (isTopLevelCall) {
            _initializing = false;
            emit Initialized(version);
        }
    }

    /**
     * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
     * {initializer} and {reinitializer} modifiers, directly or indirectly.
     */
    modifier onlyInitializing() {
        require(_initializing, "Initializable: contract is not initializing");
        _;
    }

    /**
     * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.
     * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized
     * to any version. It is recommended to use this to lock implementation contracts that are designed to be called
     * through proxies.
     */
    function _disableInitializers() internal virtual {
        _setInitializedVersion(type(uint8).max);
    }

    function _setInitializedVersion(uint8 version) private returns (bool) {
        // If the contract is initializing we ignore whether _initialized is set in order to support multiple
        // inheritance patterns, but we only do this in the context of a constructor, and for the lowest level
        // of initializers, because in other contexts the contract may have been reentered.
        if (_initializing) {
            require(
                version == 1 && !Address.isContract(address(this)),
                "Initializable: contract is already initialized"
            );
            return false;
        } else {
            require(_initialized < version, "Initializable: contract is already initialized");
            _initialized = version;
            return true;
        }
    }
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity ^0.8.9;

import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/Counters.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts/proxy/utils/Initializable.sol";

abstract contract ERC721BaseDistributor is Ownable, ReentrancyGuard {
    using Address for address;
    using Address for address payable;

    struct Entitlement {
        uint256 totalClaimed;
        uint256 lastClaimedAt;
    }

    // Config
    address public claimToken;
    address public ticketToken;

    // Map of ticket token ID -> entitlement
    mapping(uint256 => Entitlement) public entitlements;

    // Total amount claimed by all holders
    uint256 public streamTotalClaimed;

    /* EVENTS */

    event Claim(address claimer, uint256 ticketTokenId, uint256 releasedAmount);

    event ClaimBulk(
        address claimer,
        uint256[] ticketTokenIds,
        uint256 releasedAmount
    );

    function _setup(address _claimToken, address _ticketToken) internal {
        claimToken = _claimToken;
        ticketToken = _ticketToken;
    }

    /* PUBLIC */

    receive() external payable {
        require(msg.value > 0);
        require(ticketToken == address(0));
    }

    function claim(uint256 ticketTokenId) public nonReentrant {
        /* CHECKS */

        _beforeClaim(ticketTokenId);

        require(
            IERC721(ticketToken).ownerOf(ticketTokenId) == _msgSender(),
            "DISTRIBUTOR/NOT_NFT_OWNER"
        );

        uint256 claimableAmount = calculateClaimableAmount(ticketTokenId);
        require(claimableAmount > 0, "DISTRIBUTOR/NOTHING_TO_CLAIM");

        /* EFFECTS */

        entitlements[ticketTokenId].totalClaimed += claimableAmount;
        entitlements[ticketTokenId].lastClaimedAt = block.timestamp;

        streamTotalClaimed += claimableAmount;

        /* INTERACTIONS */

        if (claimToken == address(0)) {
            payable(address(_msgSender())).sendValue(claimableAmount);
        } else {
            IERC20(claimToken).transfer(_msgSender(), claimableAmount);
        }

        /* LOGS */

        emit Claim(_msgSender(), ticketTokenId, claimableAmount);
    }

    function claimBulk(uint256[] calldata ticketTokenIds) public nonReentrant {
        uint256 totalClaimableAmount;

        for (uint256 i = 0; i < ticketTokenIds.length; i++) {
            _beforeClaim(ticketTokenIds[i]);

            /* CHECKS */
            require(
                IERC721(ticketToken).ownerOf(ticketTokenIds[i]) == _msgSender(),
                "DISTRIBUTOR/NOT_NFT_OWNER"
            );

            /* EFFECTS */
            uint256 claimableAmount = calculateClaimableAmount(
                ticketTokenIds[i]
            );

            if (claimableAmount > 0) {
                entitlements[ticketTokenIds[i]].totalClaimed += claimableAmount;
                entitlements[ticketTokenIds[i]].lastClaimedAt = block.timestamp;

                totalClaimableAmount += claimableAmount;
            }
        }

        streamTotalClaimed += totalClaimableAmount;

        /* INTERACTIONS */

        if (claimToken == address(0)) {
            payable(address(_msgSender())).sendValue(totalClaimableAmount);
        } else {
            IERC20(claimToken).transfer(_msgSender(), totalClaimableAmount);
        }

        /* LOGS */

        emit ClaimBulk(_msgSender(), ticketTokenIds, totalClaimableAmount);
    }

    /* READ ONLY */

    function streamTotalSupply() public view returns (uint256) {
        return streamTotalClaimed + IERC20(claimToken).balanceOf(address(this));
    }

    function getTotalClaimedBulk(uint256[] calldata ticketTokenIds)
        public
        view
        returns (uint256)
    {
        uint256 totalClaimed = 0;

        for (uint256 i = 0; i < ticketTokenIds.length; i++) {
            totalClaimed += entitlements[ticketTokenIds[i]].totalClaimed;
        }

        return totalClaimed;
    }

    function getTotalClaimableBulk(uint256[] calldata ticketTokenIds)
        public
        view
        returns (uint256)
    {
        uint256 totalClaimable = 0;

        for (uint256 i = 0; i < ticketTokenIds.length; i++) {
            totalClaimable += calculateClaimableAmount(ticketTokenIds[i]);
        }

        return totalClaimable;
    }

    function calculateClaimableAmount(uint256 ticketTokenId)
        public
        view
        virtual
        returns (uint256 claimableAmount);

    // INTERNAL

    function _beforeClaim(uint256 ticketTokenId) internal virtual;
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity ^0.8.9;

import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/Counters.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts/proxy/utils/Initializable.sol";

import "../core/ERC721BaseDistributor.sol";

contract ERC721HolderSplitDistributor is
    Ownable,
    Initializable,
    ERC721BaseDistributor
{
    using Address for address;
    using Address for address payable;

    string public constant name = "ERC721 Equal-share Distributor";

    string public constant version = "0.1";

    struct Config {
        address claimToken;
        address ticketToken;
    }

    /* INTERNAL */

    constructor(Config memory config) {
        initialize(msg.sender, config);
    }

    function initialize(address owner, Config memory config)
        public
        initializer
    {
        Ownable._transferOwnership(owner);
        ERC721BaseDistributor._setup(config.claimToken, config.ticketToken);
    }

    // PUBLIC

    function calculateClaimableAmount(uint256 ticketTokenId)
        public
        view
        override
        returns (uint256 claimableAmount)
    {
        claimableAmount = 0; // TODO implement
    }

    // INTERNAL

    function _beforeClaim(uint256 ticketTokenId) internal view override {
        // TODO implement
    }
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity ^0.8.9;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol";

import "./ERC721AutoIdMinterExtension.sol";

interface ERC721FreeMintExtensionInterface {
    function mintFree(address to, uint256 count) external;
}

/**
 * @dev Extension to allow anyone to mint directly without paying.
 */
abstract contract ERC721FreeMintExtension is
    ERC165Storage,
    ERC721AutoIdMinterExtension,
    ERC721FreeMintExtensionInterface
{
    constructor() {
        _registerInterface(type(ERC721FreeMintExtensionInterface).interfaceId);
    }

    // PUBLIC

    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(ERC165Storage, ERC721AutoIdMinterExtension)
        returns (bool)
    {
        return ERC165Storage.supportsInterface(interfaceId);
    }

    function mintFree(address to, uint256 count) external {
        _mintTo(to, count);
    }
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity ^0.8.9;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";

contract TestERC20 is ERC20("FlairTest", "FTS") {
    function mint(address to, uint256 amount) public {
        _mint(to, amount);
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 5
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "metadata": {
    "useLiteralContent": true
  }
}

• No Contract Security Audit Submitted- Submit Audit Here

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IEIP2981RoyaltyOverride.TokenRoyalty","name":"royalty","type":"tuple"}],"name":"setDefaultRoyalty","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"newValue","type":"uint256"}],"name":"setMaxSupply","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"addr","type":"address"}],"name":"setOpenSeaExchangeAddress","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"addr","type":"address"}],"name":"setOpenSeaProxyRegistryAddress","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"newValue","type":"string"}],"name":"setPlaceholderURI","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"newValue","type":"uint256"}],"name":"setPreSaleMaxMintPerWallet","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"newValue","type":"uint256"}],"name":"setPreSalePrice","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"newValue","type":"uint256"}],"name":"setPublicSaleMaxMintPerTx","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"newValue","type":"uint256"}],"name":"setPublicSalePrice","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint16","name":"bps","type":"uint16"}],"internalType":"struct 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-----Decoded View---------------
Arg [0] : config (tuple): System.Collections.Generic.List`1[Nethereum.ABI.FunctionEncoding.ParameterOutput]

-----Encoded View---------------
25 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000020
Arg [1] : 00000000000000000000000000000000000000000000000000000000000001c0
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000200
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000240
Arg [4] : 00000000000000000000000000000000000000000000000000000000000002a0
Arg [5] : 0000000000000000000000000000000000000000000000000000000000001388
Arg [6] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [7] : 0000000000000000000000000000000000000000000000000000000000000003
Arg [8] : 000000000000000000000000000000000000000000000000002386f26fc10000
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Arg [10] : 000000000000000000000000790d99f0d48660a0a93eca2a5b0635fe84b08997
Arg [11] : 00000000000000000000000000000000000000000000000000000000000002bc
Arg [12] : 000000000000000000000000a5409ec958c83c3f309868babaca7c86dcb077c1
Arg [13] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [14] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [15] : 000000000000000000000000000000000000000000000000000000000000000b
Arg [16] : 56696b696e6720546f776e000000000000000000000000000000000000000000
Arg [17] : 0000000000000000000000000000000000000000000000000000000000000006
Arg [18] : 56494b494e470000000000000000000000000000000000000000000000000000
Arg [19] : 0000000000000000000000000000000000000000000000000000000000000035
Arg [20] : 697066733a2f2f516d5877356d43354675455a35383257367167795a36553352
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Arg [22] : 0000000000000000000000000000000000000000000000000000000000000035
Arg [23] : 697066733a2f2f516d51674e33614c6241423972697a484e635234476b347a76
Arg [24] : 346338624c445564697452647835706b38435476470000000000000000000000