// File: @franknft.eth/erc721-f/contracts/interfaces/IERC4883.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.9 <0.9.0;

import "@openzeppelin/contracts/interfaces/IERC165.sol";

/// @title EIP-4883 Non-Fungible Token Standard
/// Based on https://eips.ethereum.org/EIPS/eip-4883
interface IERC4883 is IERC165 {
    /**
     * @dev Generates the SVG image of `id`
     *
     * Requirements:
     *
     * - `id` must exist
     * - must return the SVG body for the specified token `id`
     * - must either be an empty string or a valid SVG element(s)
     */
    function renderTokenById(uint256 id) external view returns (string memory);
}

// File: @franknft.eth/erc721-f/contracts/token/ERC721/ERC721F.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.9 <0.9.0;

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

/**
 * @title ERC721F
 * @dev Extends ERC721 Non-Fungible Token Standard basic implementation.
 * Optimized to no longer use ERC721Enumerable , but still provide a totalSupply() and walletOfOwner(address _owner) implementation.
 * @author @FrankNFT.eth
 *
 */

contract ERC721F is Ownable, ERC721 {
    uint256 private _tokenSupply;
    uint256 private _burnCounter;

    // Base URI for Meta data
    string private _baseTokenURI;

    constructor(string memory name_, string memory symbol_)
        ERC721(name_, symbol_)
    {}

    /**
     * @dev walletofOwner
     * @return tokens id owned by the given address
     * This read function is O(totalSupply). If calling from a separate contract, be sure to test gas first.
     * It may also degrade with extremely large collection sizes (e.g >> 10000), test for your use case.
     */
    function walletOfOwner(address _owner)
        external
        view
        virtual
        returns (uint256[] memory)
    {
        uint256 ownerTokenCount = balanceOf(_owner);
        uint256[] memory ownedTokenIds = new uint256[](ownerTokenCount);
        uint256 currentTokenId = _startTokenId();
        uint256 ownedTokenIndex = 0;
        uint256 tokenSupply = _tokenSupply;

        unchecked {
            for(;;) {
                if (ownedTokenIndex >= ownerTokenCount) {
                    break;
                }
                if (currentTokenId >= tokenSupply) {
                    break;
                }
                if (_ownerOf(currentTokenId) == _owner) {
                    ownedTokenIds[ownedTokenIndex] = currentTokenId;
                    ownedTokenIndex++;
                }
                currentTokenId++;
            }
        }
        return ownedTokenIds;
    }

    /**
     * To change the starting tokenId, override this function.
     */
    function _startTokenId() internal view virtual returns (uint256) {
        return 0;
    }

    /**
     * @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 overriden in child contracts.
     */
    function _baseURI() internal view virtual override returns (string memory) {
        return _baseTokenURI;
    }

    /**
     * @dev Set the base token URI
     */
    function setBaseTokenURI(string memory baseURI) public onlyOwner {
        _baseTokenURI = baseURI;
    }

    /**
     *
     * @dev Mints `tokenId` and transfers it to `to`.
     *
     */
    function _mint(address to, uint256 tokenId) internal virtual override {
        super._mint(to, tokenId);
        unchecked {
            _tokenSupply++;
        }
    }

    /**
     * @dev See {ERC721-_burn}
     * Increases value of _burnCounter
     */
    function _burn(uint256 tokenId) internal virtual override {
        super._burn(tokenId);
        unchecked {
            _burnCounter++;
        }
    }

    /**
     * @dev Gets the total amount of existing tokens stored by the contract.
     * @return uint256 representing the total amount of tokens
     */
    function totalSupply() public view virtual returns (uint256) {
        return _tokenSupply - _burnCounter;
    }

    /**
     * @dev Gets total amount of tokens minted by the contract
     */
    function _totalMinted() internal view virtual returns (uint256) {
        return _tokenSupply;
    }

    /**
     * @dev Gets total amount of burned tokens
     */
    function _totalBurned() internal view virtual returns (uint256) {
        return _burnCounter;
    }
}

// File: @franknft.eth/erc721-f/contracts/token/ERC721/ERC721FCOMMON.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.9 <0.9.0;

import "./ERC721F.sol";
import "../../utils/Payable.sol";
import "@openzeppelin/contracts/token/common/ERC2981.sol";

contract ERC721FCOMMON is ERC721F, Payable, ERC2981 {
    uint16 private royalties = 500;
    address private royaltyReceiver;

    event ROYALTIESUPDATED(uint256 royalties);

    constructor(string memory name_, string memory symbol_) ERC721F(name_, symbol_) {
        setRoyaltyReceiver(address(this));
    }

    /**
     * @notice Indicates whether this contract supports an interface
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * [EIP section](https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified)
     * to learn more about how these ids are created.
     *
     * @return `true` if the contract implements `interfaceID` or is 0x2a55205a, `false` otherwise
     */
    function supportsInterface(bytes4 _interfaceId)
        public
        view
        virtual
        override(ERC721, ERC2981)
        returns (bool)
    {
        return
            _interfaceId == type(IERC2981).interfaceId ||
            super.supportsInterface(_interfaceId);
    }

    /**
     * @dev it will update the royalties for token
     * @param _royalties is new percentage of royalties. It should be more than 0 and least 90
     */
    function setRoyalties(uint16 _royalties) external onlyOwner {
        require(
            _royalties != 0 && _royalties < 90,
            "royalties should be between 0 and 90"
        );

        royalties = (_royalties * 100);

        emit ROYALTIESUPDATED(_royalties);
    }

    /**
     * @notice Returns how much royalty is owed and to whom, based on a sale price that may be denominated in any unit of
     * exchange. The royalty amount is denominated and should be paid in that same unit of exchange.
     * @param _tokenId is the token being sold and should exist.
     */
    function royaltyInfo(uint256 _tokenId, uint256 _salePrice)
        public
        view
        virtual
        override
        returns (address receiver, uint256 royaltyAmount)
    {
        require(
            _exists(_tokenId),
            "ERC2981RoyaltyStandard: Royalty info for nonexistent token"
        );
        return (royaltyReceiver, (_salePrice * royalties) / 10000);
    }

    /**
     * @notice Sets `receiver` as royaltyReceiver
     */
    function setRoyaltyReceiver(address receiver) public virtual onlyOwner {
        royaltyReceiver = receiver;
    }
}

// File: @franknft.eth/erc721-f/contracts/utils/AllowList.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.9 <0.9.0;

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

abstract contract AllowList is Ownable {
    mapping(address => bool) private allowList;

    modifier onlyAllowList() {
        require(isAllowList(msg.sender), "Address is not within allowList");
        _;
    }

    /**
     * @notice Adds an address to the allowList
     */
    function allowAddress(address _address) public onlyOwner {
        allowList[_address] = true;
    }

    /**
     * @notice Adds an array of addresses to the allowList
     */
    function allowAddresses(address[] calldata _addresses) external onlyOwner {
        uint length = _addresses.length;
        for (uint i; i < length; ) {
            allowAddress(_addresses[i]);
            unchecked {
                i++;
            }
        }
    }

    /**
     * @notice Removes an address off the allowList
     */
    function disallowAddress(address _address) external onlyOwner {
        _disallowAddress(_address);
    }

    /**
     * @dev Sets `_address` to `false` in allowList
     */
    function _disallowAddress(address _address) internal {
        delete allowList[_address];
    }

    /**
     * @notice Returns `true` if `_address` is in and `true` in the allowList
     */
    function isAllowList(address _address) public view returns (bool) {
        return allowList[_address];
    }
}

// File: @franknft.eth/erc721-f/contracts/utils/Payable.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.9 <0.9.0;

abstract contract Payable {
    /**
    * Helper method to allow ETH withdraws.
    */
    function _withdraw(address _address, uint256 _amount) internal {
        (bool success, ) = _address.call{ value: _amount }("");
        require(success, "Failed to withdraw Ether");
    }

    // contract can recieve Ether
    receive() external payable { }
}

// File: @openzeppelin/contracts/access/Ownable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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 Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

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

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

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

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

// File: @openzeppelin/contracts/interfaces/IERC165.sol



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

pragma solidity ^0.8.0;

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

// File: @openzeppelin/contracts/interfaces/IERC2981.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (interfaces/IERC2981.sol)

pragma solidity ^0.8.0;

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

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

// File: @openzeppelin/contracts/token/common/ERC2981.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/common/ERC2981.sol)

pragma solidity ^0.8.0;

import "../../interfaces/IERC2981.sol";
import "../../utils/introspection/ERC165.sol";

/**
 * @dev Implementation of the NFT Royalty Standard, a standardized way to retrieve royalty payment information.
 *
 * Royalty information can be specified globally for all token ids via {_setDefaultRoyalty}, and/or individually for
 * specific token ids via {_setTokenRoyalty}. The latter takes precedence over the first.
 *
 * Royalty is specified as a fraction of sale price. {_feeDenominator} is overridable but defaults to 10000, meaning the
 * fee is specified in basis points by default.
 *
 * IMPORTANT: ERC-2981 only specifies a way to signal royalty information and does not enforce its payment. See
 * https://eips.ethereum.org/EIPS/eip-2981#optional-royalty-payments[Rationale] in the EIP. Marketplaces are expected to
 * voluntarily pay royalties together with sales, but note that this standard is not yet widely supported.
 *
 * _Available since v4.5._
 */
abstract contract ERC2981 is IERC2981, ERC165 {
    struct RoyaltyInfo {
        address receiver;
        uint96 royaltyFraction;
    }

    RoyaltyInfo private _defaultRoyaltyInfo;
    mapping(uint256 => RoyaltyInfo) private _tokenRoyaltyInfo;

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC165) returns (bool) {
        return interfaceId == type(IERC2981).interfaceId || super.supportsInterface(interfaceId);
    }

    /**
     * @inheritdoc IERC2981
     */
    function royaltyInfo(uint256 tokenId, uint256 salePrice) public view virtual override returns (address, uint256) {
        RoyaltyInfo memory royalty = _tokenRoyaltyInfo[tokenId];

        if (royalty.receiver == address(0)) {
            royalty = _defaultRoyaltyInfo;
        }

        uint256 royaltyAmount = (salePrice * royalty.royaltyFraction) / _feeDenominator();

        return (royalty.receiver, royaltyAmount);
    }

    /**
     * @dev The denominator with which to interpret the fee set in {_setTokenRoyalty} and {_setDefaultRoyalty} as a
     * fraction of the sale price. Defaults to 10000 so fees are expressed in basis points, but may be customized by an
     * override.
     */
    function _feeDenominator() internal pure virtual returns (uint96) {
        return 10000;
    }

    /**
     * @dev Sets the royalty information that all ids in this contract will default to.
     *
     * Requirements:
     *
     * - `receiver` cannot be the zero address.
     * - `feeNumerator` cannot be greater than the fee denominator.
     */
    function _setDefaultRoyalty(address receiver, uint96 feeNumerator) internal virtual {
        require(feeNumerator <= _feeDenominator(), "ERC2981: royalty fee will exceed salePrice");
        require(receiver != address(0), "ERC2981: invalid receiver");

        _defaultRoyaltyInfo = RoyaltyInfo(receiver, feeNumerator);
    }

    /**
     * @dev Removes default royalty information.
     */
    function _deleteDefaultRoyalty() internal virtual {
        delete _defaultRoyaltyInfo;
    }

    /**
     * @dev Sets the royalty information for a specific token id, overriding the global default.
     *
     * Requirements:
     *
     * - `receiver` cannot be the zero address.
     * - `feeNumerator` cannot be greater than the fee denominator.
     */
    function _setTokenRoyalty(uint256 tokenId, address receiver, uint96 feeNumerator) internal virtual {
        require(feeNumerator <= _feeDenominator(), "ERC2981: royalty fee will exceed salePrice");
        require(receiver != address(0), "ERC2981: Invalid parameters");

        _tokenRoyaltyInfo[tokenId] = RoyaltyInfo(receiver, feeNumerator);
    }

    /**
     * @dev Resets royalty information for the token id back to the global default.
     */
    function _resetTokenRoyalty(uint256 tokenId) internal virtual {
        delete _tokenRoyaltyInfo[tokenId];
    }
}

// File: @openzeppelin/contracts/token/ERC721/ERC721.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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: address zero is not a valid owner");
        return _balances[owner];
    }

    /**
     * @dev See {IERC721-ownerOf}.
     */
    function ownerOf(uint256 tokenId) public view virtual override returns (address) {
        address owner = _ownerOf(tokenId);
        require(owner != address(0), "ERC721: invalid token ID");
        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) {
        _requireMinted(tokenId);

        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 token owner or approved for all"
        );

        _approve(to, tokenId);
    }

    /**
     * @dev See {IERC721-getApproved}.
     */
    function getApproved(uint256 tokenId) public view virtual override returns (address) {
        _requireMinted(tokenId);

        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: caller is not token owner or 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: caller is not token owner or 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 the owner of the `tokenId`. Does NOT revert if token doesn't exist
     */
    function _ownerOf(uint256 tokenId) internal view virtual returns (address) {
        return _owners[tokenId];
    }

    /**
     * @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 _ownerOf(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) {
        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, 1);

        // Check that tokenId was not minted by `_beforeTokenTransfer` hook
        require(!_exists(tokenId), "ERC721: token already minted");

        unchecked {
            // Will not overflow unless all 2**256 token ids are minted to the same owner.
            // Given that tokens are minted one by one, it is impossible in practice that
            // this ever happens. Might change if we allow batch minting.
            // The ERC fails to describe this case.
            _balances[to] += 1;
        }

        _owners[tokenId] = to;

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

        _afterTokenTransfer(address(0), to, tokenId, 1);
    }

    /**
     * @dev Destroys `tokenId`.
     * The approval is cleared when the token is burned.
     * This is an internal function that does not check if the sender is authorized to operate on the token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     *
     * Emits a {Transfer} event.
     */
    function _burn(uint256 tokenId) internal virtual {
        address owner = ERC721.ownerOf(tokenId);

        _beforeTokenTransfer(owner, address(0), tokenId, 1);

        // Update ownership in case tokenId was transferred by `_beforeTokenTransfer` hook
        owner = ERC721.ownerOf(tokenId);

        // Clear approvals
        delete _tokenApprovals[tokenId];

        unchecked {
            // Cannot overflow, as that would require more tokens to be burned/transferred
            // out than the owner initially received through minting and transferring in.
            _balances[owner] -= 1;
        }
        delete _owners[tokenId];

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

        _afterTokenTransfer(owner, address(0), tokenId, 1);
    }

    /**
     * @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, 1);

        // Check that tokenId was not transferred by `_beforeTokenTransfer` hook
        require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer from incorrect owner");

        // Clear approvals from the previous owner
        delete _tokenApprovals[tokenId];

        unchecked {
            // `_balances[from]` cannot overflow for the same reason as described in `_burn`:
            // `from`'s balance is the number of token held, which is at least one before the current
            // transfer.
            // `_balances[to]` could overflow in the conditions described in `_mint`. That would require
            // all 2**256 token ids to be minted, which in practice is impossible.
            _balances[from] -= 1;
            _balances[to] += 1;
        }
        _owners[tokenId] = to;

        emit Transfer(from, to, tokenId);

        _afterTokenTransfer(from, to, tokenId, 1);
    }

    /**
     * @dev Approve `to` to operate on `tokenId`
     *
     * Emits an {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 an {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 Reverts if the `tokenId` has not been minted yet.
     */
    function _requireMinted(uint256 tokenId) internal view virtual {
        require(_exists(tokenId), "ERC721: invalid token ID");
    }

    /**
     * @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 {
                    /// @solidity memory-safe-assembly
                    assembly {
                        revert(add(32, reason), mload(reason))
                    }
                }
            }
        } else {
            return true;
        }
    }

    /**
     * @dev Hook that is called before any token transfer. This includes minting and burning. If {ERC721Consecutive} is
     * used, the hook may be called as part of a consecutive (batch) mint, as indicated by `batchSize` greater than 1.
     *
     * Calling conditions:
     *
     * - When `from` and `to` are both non-zero, ``from``'s tokens will be transferred to `to`.
     * - When `from` is zero, the tokens will be minted for `to`.
     * - When `to` is zero, ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     * - `batchSize` is non-zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(address from, address to, uint256 firstTokenId, uint256 batchSize) internal virtual {}

    /**
     * @dev Hook that is called after any token transfer. This includes minting and burning. If {ERC721Consecutive} is
     * used, the hook may be called as part of a consecutive (batch) mint, as indicated by `batchSize` greater than 1.
     *
     * Calling conditions:
     *
     * - When `from` and `to` are both non-zero, ``from``'s tokens were transferred to `to`.
     * - When `from` is zero, the tokens were minted for `to`.
     * - When `to` is zero, ``from``'s tokens were burned.
     * - `from` and `to` are never both zero.
     * - `batchSize` is non-zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _afterTokenTransfer(address from, address to, uint256 firstTokenId, uint256 batchSize) internal virtual {}

    /**
     * @dev Unsafe write access to the balances, used by extensions that "mint" tokens using an {ownerOf} override.
     *
     * WARNING: Anyone calling this MUST ensure that the balances remain consistent with the ownership. The invariant
     * being that for any address `a` the value returned by `balanceOf(a)` must be equal to the number of tokens such
     * that `ownerOf(tokenId)` is `a`.
     */
    // solhint-disable-next-line func-name-mixedcase
    function __unsafe_increaseBalance(address account, uint256 amount) internal {
        _balances[account] += amount;
    }
}

// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol



// 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);
}

// File: @openzeppelin/contracts/token/ERC721/IERC721.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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 have been allowed to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(address from, address to, uint256 tokenId) external;

    /**
     * @dev Transfers `tokenId` token from `from` to `to`.
     *
     * WARNING: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC721
     * or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must
     * understand this adds an external call which potentially creates a reentrancy vulnerability.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 tokenId) external;

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

    /**
     * @dev Approve or remove `operator` as an operator for the caller.
     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
     *
     * Requirements:
     *
     * - The `operator` cannot be the 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);
}

// File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol



// 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);
}

// File: @openzeppelin/contracts/utils/Address.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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
     *
     * Furthermore, `isContract` will also return true if the target contract within
     * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
     * which only has an effect at the end of a transaction.
     * ====
     *
     * [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://consensys.net/diligence/blog/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/v0.8.0/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 functionCallWithValue(target, data, 0, "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");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, 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) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, 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) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or 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 {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // 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
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}

// File: @openzeppelin/contracts/utils/Base64.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/Base64.sol)

pragma solidity ^0.8.0;

/**
 * @dev Provides a set of functions to operate with Base64 strings.
 *
 * _Available since v4.5._
 */
library Base64 {
    /**
     * @dev Base64 Encoding/Decoding Table
     */
    string internal constant _TABLE = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";

    /**
     * @dev Converts a `bytes` to its Bytes64 `string` representation.
     */
    function encode(bytes memory data) internal pure returns (string memory) {
        /**
         * Inspired by Brecht Devos (Brechtpd) implementation - MIT licence
         * https://github.com/Brechtpd/base64/blob/e78d9fd951e7b0977ddca77d92dc85183770daf4/base64.sol
         */
        if (data.length == 0) return "";

        // Loads the table into memory
        string memory table = _TABLE;

        // Encoding takes 3 bytes chunks of binary data from `bytes` data parameter
        // and split into 4 numbers of 6 bits.
        // The final Base64 length should be `bytes` data length multiplied by 4/3 rounded up
        // - `data.length + 2`  -> Round up
        // - `/ 3`              -> Number of 3-bytes chunks
        // - `4 *`              -> 4 characters for each chunk
        string memory result = new string(4 * ((data.length + 2) / 3));

        /// @solidity memory-safe-assembly
        assembly {
            // Prepare the lookup table (skip the first "length" byte)
            let tablePtr := add(table, 1)

            // Prepare result pointer, jump over length
            let resultPtr := add(result, 32)

            // Run over the input, 3 bytes at a time
            for {
                let dataPtr := data
                let endPtr := add(data, mload(data))
            } lt(dataPtr, endPtr) {

            } {
                // Advance 3 bytes
                dataPtr := add(dataPtr, 3)
                let input := mload(dataPtr)

                // To write each character, shift the 3 bytes (18 bits) chunk
                // 4 times in blocks of 6 bits for each character (18, 12, 6, 0)
                // and apply logical AND with 0x3F which is the number of
                // the previous character in the ASCII table prior to the Base64 Table
                // The result is then added to the table to get the character to write,
                // and finally write it in the result pointer but with a left shift
                // of 256 (1 byte) - 8 (1 ASCII char) = 248 bits

                mstore8(resultPtr, mload(add(tablePtr, and(shr(18, input), 0x3F))))
                resultPtr := add(resultPtr, 1) // Advance

                mstore8(resultPtr, mload(add(tablePtr, and(shr(12, input), 0x3F))))
                resultPtr := add(resultPtr, 1) // Advance

                mstore8(resultPtr, mload(add(tablePtr, and(shr(6, input), 0x3F))))
                resultPtr := add(resultPtr, 1) // Advance

                mstore8(resultPtr, mload(add(tablePtr, and(input, 0x3F))))
                resultPtr := add(resultPtr, 1) // Advance
            }

            // When data `bytes` is not exactly 3 bytes long
            // it is padded with `=` characters at the end
            switch mod(mload(data), 3)
            case 1 {
                mstore8(sub(resultPtr, 1), 0x3d)
                mstore8(sub(resultPtr, 2), 0x3d)
            }
            case 2 {
                mstore8(sub(resultPtr, 1), 0x3d)
            }
        }

        return result;
    }
}

// File: @openzeppelin/contracts/utils/Context.sol



// 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;
    }
}

// File: @openzeppelin/contracts/utils/introspection/ERC165.sol



// 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;
    }
}

// File: @openzeppelin/contracts/utils/introspection/IERC165.sol



// 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);
}

// File: @openzeppelin/contracts/utils/math/Math.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/math/Math.sol)

pragma solidity ^0.8.0;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    enum Rounding {
        Down, // Toward negative infinity
        Up, // Toward infinity
        Zero // Toward zero
    }

    /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a > b ? a : b;
    }

    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two numbers. The result is rounded towards
     * zero.
     */
    function average(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b) / 2 can overflow.
        return (a & b) + (a ^ b) / 2;
    }

    /**
     * @dev Returns the ceiling of the division of two numbers.
     *
     * This differs from standard division with `/` in that it rounds up instead
     * of rounding down.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b - 1) / b can overflow on addition, so we distribute.
        return a == 0 ? 0 : (a - 1) / b + 1;
    }

    /**
     * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
     * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)
     * with further edits by Uniswap Labs also under MIT license.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) {
        unchecked {
            // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
            // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
            // variables such that product = prod1 * 2^256 + prod0.
            uint256 prod0; // Least significant 256 bits of the product
            uint256 prod1; // Most significant 256 bits of the product
            assembly {
                let mm := mulmod(x, y, not(0))
                prod0 := mul(x, y)
                prod1 := sub(sub(mm, prod0), lt(mm, prod0))
            }

            // Handle non-overflow cases, 256 by 256 division.
            if (prod1 == 0) {
                // Solidity will revert if denominator == 0, unlike the div opcode on its own.
                // The surrounding unchecked block does not change this fact.
                // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.
                return prod0 / denominator;
            }

            // Make sure the result is less than 2^256. Also prevents denominator == 0.
            require(denominator > prod1, "Math: mulDiv overflow");

            ///////////////////////////////////////////////
            // 512 by 256 division.
            ///////////////////////////////////////////////

            // Make division exact by subtracting the remainder from [prod1 prod0].
            uint256 remainder;
            assembly {
                // Compute remainder using mulmod.
                remainder := mulmod(x, y, denominator)

                // Subtract 256 bit number from 512 bit number.
                prod1 := sub(prod1, gt(remainder, prod0))
                prod0 := sub(prod0, remainder)
            }

            // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.
            // See https://cs.stackexchange.com/q/138556/92363.

            // Does not overflow because the denominator cannot be zero at this stage in the function.
            uint256 twos = denominator & (~denominator + 1);
            assembly {
                // Divide denominator by twos.
                denominator := div(denominator, twos)

                // Divide [prod1 prod0] by twos.
                prod0 := div(prod0, twos)

                // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
                twos := add(div(sub(0, twos), twos), 1)
            }

            // Shift in bits from prod1 into prod0.
            prod0 |= prod1 * twos;

            // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
            // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
            // four bits. That is, denominator * inv = 1 mod 2^4.
            uint256 inverse = (3 * denominator) ^ 2;

            // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works
            // in modular arithmetic, doubling the correct bits in each step.
            inverse *= 2 - denominator * inverse; // inverse mod 2^8
            inverse *= 2 - denominator * inverse; // inverse mod 2^16
            inverse *= 2 - denominator * inverse; // inverse mod 2^32
            inverse *= 2 - denominator * inverse; // inverse mod 2^64
            inverse *= 2 - denominator * inverse; // inverse mod 2^128
            inverse *= 2 - denominator * inverse; // inverse mod 2^256

            // Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
            // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
            // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
            // is no longer required.
            result = prod0 * inverse;
            return result;
        }
    }

    /**
     * @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) {
        uint256 result = mulDiv(x, y, denominator);
        if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {
            result += 1;
        }
        return result;
    }

    /**
     * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down.
     *
     * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
     */
    function sqrt(uint256 a) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }

        // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
        //
        // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
        // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
        //
        // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
        // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
        // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
        //
        // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
        uint256 result = 1 << (log2(a) >> 1);

        // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
        // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
        // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
        // into the expected uint128 result.
        unchecked {
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            return min(result, a / result);
        }
    }

    /**
     * @notice Calculates sqrt(a), following the selected rounding direction.
     */
    function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = sqrt(a);
            return result + (rounding == Rounding.Up && result * result < a ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 2, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 128;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 64;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 32;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 16;
            }
            if (value >> 8 > 0) {
                value >>= 8;
                result += 8;
            }
            if (value >> 4 > 0) {
                value >>= 4;
                result += 4;
            }
            if (value >> 2 > 0) {
                value >>= 2;
                result += 2;
            }
            if (value >> 1 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 2, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log2(value);
            return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 10, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >= 10 ** 64) {
                value /= 10 ** 64;
                result += 64;
            }
            if (value >= 10 ** 32) {
                value /= 10 ** 32;
                result += 32;
            }
            if (value >= 10 ** 16) {
                value /= 10 ** 16;
                result += 16;
            }
            if (value >= 10 ** 8) {
                value /= 10 ** 8;
                result += 8;
            }
            if (value >= 10 ** 4) {
                value /= 10 ** 4;
                result += 4;
            }
            if (value >= 10 ** 2) {
                value /= 10 ** 2;
                result += 2;
            }
            if (value >= 10 ** 1) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log10(value);
            return result + (rounding == Rounding.Up && 10 ** result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 256, rounded down, of a positive value.
     * Returns 0 if given 0.
     *
     * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
     */
    function log256(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 16;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 8;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 4;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 2;
            }
            if (value >> 8 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 256, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log256(value);
            return result + (rounding == Rounding.Up && 1 << (result << 3) < value ? 1 : 0);
        }
    }
}

// File: @openzeppelin/contracts/utils/math/SignedMath.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SignedMath.sol)

pragma solidity ^0.8.0;

/**
 * @dev Standard signed math utilities missing in the Solidity language.
 */
library SignedMath {
    /**
     * @dev Returns the largest of two signed numbers.
     */
    function max(int256 a, int256 b) internal pure returns (int256) {
        return a > b ? a : b;
    }

    /**
     * @dev Returns the smallest of two signed numbers.
     */
    function min(int256 a, int256 b) internal pure returns (int256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two signed numbers without overflow.
     * The result is rounded towards zero.
     */
    function average(int256 a, int256 b) internal pure returns (int256) {
        // Formula from the book "Hacker's Delight"
        int256 x = (a & b) + ((a ^ b) >> 1);
        return x + (int256(uint256(x) >> 255) & (a ^ b));
    }

    /**
     * @dev Returns the absolute unsigned value of a signed value.
     */
    function abs(int256 n) internal pure returns (uint256) {
        unchecked {
            // must be unchecked in order to support `n = type(int256).min`
            return uint256(n >= 0 ? n : -n);
        }
    }
}

// File: @openzeppelin/contracts/utils/Strings.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Strings.sol)

pragma solidity ^0.8.0;

import "./math/Math.sol";
import "./math/SignedMath.sol";

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _SYMBOLS = "0123456789abcdef";
    uint8 private constant _ADDRESS_LENGTH = 20;

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        unchecked {
            uint256 length = Math.log10(value) + 1;
            string memory buffer = new string(length);
            uint256 ptr;
            /// @solidity memory-safe-assembly
            assembly {
                ptr := add(buffer, add(32, length))
            }
            while (true) {
                ptr--;
                /// @solidity memory-safe-assembly
                assembly {
                    mstore8(ptr, byte(mod(value, 10), _SYMBOLS))
                }
                value /= 10;
                if (value == 0) break;
            }
            return buffer;
        }
    }

    /**
     * @dev Converts a `int256` to its ASCII `string` decimal representation.
     */
    function toString(int256 value) internal pure returns (string memory) {
        return string(abi.encodePacked(value < 0 ? "-" : "", toString(SignedMath.abs(value))));
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        unchecked {
            return toHexString(value, Math.log256(value) + 1);
        }
    }

    /**
     * @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] = _SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }

    /**
     * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation.
     */
    function toHexString(address addr) internal pure returns (string memory) {
        return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);
    }

    /**
     * @dev Returns true if the two strings are equal.
     */
    function equal(string memory a, string memory b) internal pure returns (bool) {
        return keccak256(bytes(a)) == keccak256(bytes(b));
    }
}

// File: contracts/OnChainBunnies.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.9 <0.9.0;

import "@franknft.eth/erc721-f/contracts/interfaces/IERC4883.sol";
import "@franknft.eth/erc721-f/contracts/token/ERC721/ERC721FCOMMON.sol";
import "@openzeppelin/contracts/utils/Strings.sol";
import "@openzeppelin/contracts/utils/Base64.sol";
import "@franknft.eth/erc721-f/contracts/utils/AllowList.sol";


/**
 * @title OnChainBunnies
 * 99.95% deployment cost reduction
 * Excluding insider trading with a new sampling algorithm without replacement
 * 
 */
contract OnChainBunnies is IERC4883, ERC721FCOMMON, AllowList {
    
    uint256 public last_selected = 0; 
    bool public saleIsActive;
    bool public preSaleIsActive;
    uint public tokenPrice = 0.01 ether;
    mapping(uint256 => uint256) private IdToAlgorithmId;


    string[5] private frame = ['<svg width="1080" height="1080" style="background-color:#',
            '" stroke="#000" xmlns="http://www.w3.org/2000/svg">',
            '<ellipse stroke-width="10" ry="266" rx="200" cy="540" cx="540" fill="#fff"/>',
            '<ellipse transform="rotate(25 660 250)" ry="107" rx="45" cy="250" cx="660" stroke-width="10" fill="#fff"/><ellipse transform="rotate(-25 420 250)" ry="107" rx="45" cy="250" cx="420" stroke-width="10" fill="#fff"/><ellipse transform="rotate(-25 435 283)" ry="68" rx="26" cy="283" cx="435" stroke-width="10" fill="#FFAFCC"/><ellipse transform="rotate(25 645 283)" ry="68" rx="26" cy="283" cx="645" stroke-width="10" fill="#FFAFCC"/><circle cy="427" cx="470" stroke-width="10" r="30"/><circle cy="427" cx="610" stroke-width="10" r="30"/><circle cy="418" cx="465" r="12" fill="#fff" stroke="none"/><circle cy="440" cx="484" r="6" fill="#fff" stroke="none"/><circle cy="418" cx="615" r="12" fill="#fff" stroke="none"/><circle cy="440" cx="600" r="8" fill="#fff" stroke="none"/><circle cy="520" cx="540" stroke-width="4" fill="#FFAFCC" r="14"/><ellipse ry="120" rx="100" cy="685" cx="540" stroke-width="4" fill="#FFE2FF"/><ellipse ry="106" rx="80" cy="697" cx="540" fill="#FFAFCC" stroke="none"/><ellipse transform="rotate(-17 610 804)" ry="43" rx="30" cy="804" cx="610" stroke-width="10" fill="#fff"/><ellipse transform="rotate(17 470 804)" ry="43" rx="30" cy="804" cx="470" stroke-width="10" fill="#fff"/><ellipse transform="rotate(30 750 518)" ry="48" rx="31" cy="518" cx="750" stroke-width="10" fill="#fff"/><ellipse transform="rotate(-30 330 518)" ry="48" rx="31" cy="518" cx="330" stroke-width="10" fill="#fff"/>',
            '</svg>']; 

    constructor() ERC721FCOMMON("OnChainBunnies", "OCB") {
    }


    /**
     * Changes the state of saleIsActive from true to false and false to true
     */
    function flipSaleState() external onlyOwner {
        saleIsActive = !saleIsActive;
        preSaleIsActive = false;
    }

    function flipPreSaleState() external onlyOwner {
        preSaleIsActive = !preSaleIsActive;
    }

    /**
     * @notice Creates the tokenURI which contains the name, description, generated SVG image and token traits
     */
    function tokenURI(uint256 tokenId)
        public
        view
        override
        returns (string memory)
    {
        require(_exists(tokenId), "Non-Existing");
        string memory svgData = renderTokenById(tokenId);
        string memory traits = getTraits(tokenId);
        string memory json = Base64.encode(
            bytes(
                string(
                    abi.encodePacked(
                        '{"name": "',
                        name(),
                        " ",
                        Strings.toString(tokenId),
                        '", "description": "',
                        "ocb"
                        '", "image": "data:image/svg+xml;base64,',
                        Base64.encode(bytes(svgData)),
                        bytes(traits).length == 0 ? '"' : '", "attributes": ',
                        traits,
                        "}"
                    )
                )
            )
        );
        return string(abi.encodePacked("data:application/json;base64,", json));
    }

    


    function sample(uint256 numberOfTokens) public payable {
        require(msg.sender == tx.origin, "No Contracts allowed");
        require(numberOfTokens > 0, "#NFTS != 0");
        uint256 supply = _totalMinted(); 
        require(
            supply + numberOfTokens <= 2000,
            "Sold out"
        );
        while (numberOfTokens != 0 ) {
            uint256 randomNumber = uint256(keccak256(abi.encodePacked(block.timestamp, block.difficulty, supply, msg.sender))) % 47217;
            uint256 algorithmId = last_selected + randomNumber;
            if (checkId(algorithmId)){
                _mint(msg.sender, supply + 1); 
                unchecked {
                    supply++;
                    numberOfTokens--;
                }
                IdToAlgorithmId[supply + 1] = algorithmId;
            }
            last_selected = algorithmId;
        }
    }

    /**
     * @notice Mints `numberOfTokens` tokens for `sender`
     */
    function mint(uint256 numberOfTokens) external payable {
        require(saleIsActive, "Sale inactive");
        require(
            numberOfTokens < 31,
            "Max 30 NFTs"
        );
        require(
            tokenPrice * numberOfTokens <= msg.value,
            "Value incorrect"
        );
        sample(numberOfTokens);
    }

    function mintPresale(uint256 numberOfTokens) external payable onlyAllowList{
        require(preSaleIsActive, "PreSale inactive");
        require(
            numberOfTokens < 11,
            "Max 20 NFTs"
        );
        require(
            tokenPrice * numberOfTokens <= msg.value,
            "Value incorrect"
        );
        sample(2 * numberOfTokens);
        
    }

    function getPurseId(uint256 Id) internal pure returns (uint256 purseId){
        uint256 bit_1 = (Id >> 4) & 1;
        uint256 bit_2 = (Id >> 10) & 1;
        uint256 bit_3 = (Id >> 24) & 1;
        return ((bit_3 << 2) | (bit_2 << 1) | bit_1);
    }

    function getBraceletId(uint256 Id) internal pure returns (uint256 braceletId){
        uint256 bit_1 = (Id >> 3) & 1;
        uint256 bit_2 = (Id >> 9) & 1;
        uint256 bit_3 = (Id >> 23) & 1;
        return ((bit_3 << 2) | (bit_2 << 1) | bit_1);
    }

    function getWizardId(uint256 Id) internal pure returns (uint256 wizardId){
        uint256 bit_1 = (Id >> 2) & 1;
        uint256 bit_2 = (Id >> 8) & 1;
        uint256 bit_3 = (Id >> 22) & 1;
        return ((bit_3 << 2) | (bit_2 << 1) | bit_1);
    }

    function getWhiskersId(uint256 Id) internal pure returns (uint256 whiskersId){
        uint256 bit_1 = (Id >> 1) & 1;
        uint256 bit_2 = (Id >> 21) & 1;
        return ((bit_2 << 1) | bit_1);
    }
    
    function getEyebrowsId(uint256 Id) internal pure returns (uint256 eyebrowsId){
        uint256 bit_1 = Id & 1;
        uint256 bit_2 = (Id >> 20) & 1;
        return ((bit_2 << 1) | bit_1);
    }

    function getHatId(uint256 Id) internal pure returns (uint256 hatId){
        uint256 bit_1 = (Id >> 5) & 1;
        uint256 bit_5 = (Id >> 25) & 1;
        uint256 trait_mask = 7; //0b111 = 7
        uint256 bitMask = trait_mask << 11;
        uint256 bit_234 = ((Id & bitMask) >> 11);
        return ((bit_5 << 4) | (bit_234 << 1) | bit_1);
    }

    function getGlassesId(uint256 Id) internal pure returns (uint256 glassesId){
        uint256 bit_1 = (Id >> 6) & 1;
        uint256 bit_5 = (Id >> 26) & 1;
        uint256 trait_mask = 7; //0b111 = 7
        uint256 bitMask = trait_mask << 14;
        uint256 bit_234 = ((Id & bitMask) >> 14);
        return ((bit_5 << 4) | (bit_234 << 1) | bit_1);
    }

    function getTieId(uint256 Id) internal pure returns (uint256 tieId){
        uint256 bit_1 = (Id >> 7) & 1;
        uint256 bit_5 = (Id >> 27) & 1;
        uint256 trait_mask = 7; //0b111 = 7
        uint256 bitMask = trait_mask << 17;
        uint256 bit_234 = ((Id & bitMask) >> 17);
        return ((bit_5 << 4) | (bit_234 << 1) | bit_1);
    }

    function checkId(uint256 Id) private pure returns (bool ok){
        return !(getGlassesId(Id) > 24 || getTieId(Id) > 28 || getWizardId(Id) > 5 || getHatId(Id) > 30);
    }


    function getTie(uint256 tie_id) internal pure returns(string memory){
        string memory bow = '<path stroke-width="8" fill="#';
        string[2] memory bow_tie_circle = [
            '" d="m540 570 80-20v40zm0 0-80-20v40z"/><circle cy="570" cx="540" r="14" stroke-width="8" fill="#',
            '"/>'];
        string[2] memory bow_tie_square = [
            '" d="m540 570 80-20v40zm0 0-80-20v40z"/><rect x="527" y="557" width="26" height="26" stroke-width="8" fill="',
            '"/>'];
        string[3] memory tie = ['<polygon points="540,555 510,710 570,710"  stroke-width="8" fill="#',
        '"/><circle cy="570" cx="540" r="15" stroke-width="8" fill="#',
        '"/>'];
        string[3] memory tie_colors = ['56aaff', '5f00bf', 'ff7f00'];
        
        if (tie_id == 0){
            return'';
        }
        //bow_ties
        if (tie_id%3 == 0){
            //tie circle
            return string(abi.encodePacked(
                bow,
                tie_colors[tie_id/3%3],
                bow_tie_circle[0],
                tie_colors[tie_id/9%3],
                bow_tie_circle[1]
        )
        );
        }
        if (tie_id%3 == 1){
            //tie square
            return string(abi.encodePacked(
                bow,
                tie_colors[tie_id/3%3],
                bow_tie_square[0],
                tie_colors[tie_id/9%3],
                bow_tie_square[1]
        )
        );
        }
        
        //normal tie 
        return string(abi.encodePacked(
                tie[0],
                tie_colors[tie_id/3%3],
                tie[1],
                tie_colors[tie_id/9%3],
                tie[2]
        )
        );

        
        
    }

    function getWhiskers(uint256 whiskers_id) internal pure returns(string memory){
        string[13] memory whiskers = ['<path stroke-width="4" d="M', ' 520h','v2', 'zm','L512 510l-.347 1.97-', 'zm0', 'L512 530l.347 1.97-', 'zM570 520h', 'v2', 'zm-2-10', 'zm0 20 ', '1.97-', 'z"/>'];
        string[12] memory whiskers_short = ['430', '80', 'h-80', '3.215-23.8922', '78.785-13.892', ' 47.784', '78.784 13.891', '80', 'h-80', ' 78.785-13.892.347 1.97-78.785 13.892', ' 78.785 13.892-.348 ', '78.784-13.892'];
        string[12] memory whiskers_long = ['390', '120', 'H390', '3.823-30.8382', '118.177-20.838', ' 61.676', '118.177 20.837', '120','H570', ' 118.177-20.838.347 1.97-118.177 20.838', ' 118.177 20.838-.347 ', '118.177-20.838' ];
        string[12] memory whiskers_very_short = ['490', '20', 'h-20', '2.304-13.473', '19.696-3.473', ' 26.946', '19.696 3.473', '20', 'h-20', ' 19.696-3.473.347 1.97-19.696 3.473', ' 19.696 3.473-.347 ', '19.696-3.473'];
    
        string[12] memory short_or_long;
        if (whiskers_id == 0){
            return '';
        }
        else if (whiskers_id == 1){
            short_or_long = whiskers_short;
        }
        else if (whiskers_id == 2){
            short_or_long = whiskers_long;
        }
        else if (whiskers_id > 2){
            short_or_long = whiskers_very_short;
        }
        string memory whisker_string;
        
        for (uint i=0; i<12;){
            whisker_string = string(abi.encodePacked(whisker_string, whiskers[i], short_or_long[i]));
            unchecked{
                i++;
              }
        }
    
        return string(abi.encodePacked(
            whisker_string, 
            whiskers[12]
        )
        ); 
    }

    function getMagic(uint256 magic_id) internal pure returns(string memory){
        string[2] memory magic = ['<rect y="350" x="750" width="20" height="160" stroke-width="8" fill="#', '"/><rect y="350" x="748" width="24" height="40" stroke-width="8" fill="#FFEA00"/><circle cy="300" cx="710" r="12" fill="#FFEA00" stroke-width="8"/><circle cy="260" cx="800" r="12" fill="#FFEA00" stroke-width="8"/><circle cy="230" cx="730" r="12" fill="#FFEA00" stroke-width="8"/><circle cy="300" cx="760" r="12" fill="#FFEA00" stroke-width="8"/><circle cy="340" cx="810" r="12" fill="#FFEA00" stroke-width="8"/>'];
        string[4] memory magic_colors = ['f', 'CEC9DF','FDF1CA', 'EDCCB6'];

        if (magic_id == 0){
            return '';
        }
        return string(abi.encodePacked(
            magic[0],
            magic_colors[magic_id-1],
            magic[1]
        )
        ); 

        
    }

    function getBracelet(uint256 bracelet_id) internal pure returns(string memory){
        string[5] memory bracelet_colors = ['FFF093', '05faf6', '07ab2d', 'f70505', 'f768e2'];
        string[2] memory bracelet = ['<circle cy="520" cx="310" r="8" fill="#FFF093" stroke-width="4"/><circle cy="510" cx="350" r="8" fill="#FFF093" stroke-width="4"/><circle cy="519" cx="331" r="12" fill="#',
    '       " stroke-width="4"/>'];
        if (bracelet_id == 0){
            return '';
        }
        return string(abi.encodePacked(
            bracelet[0],
            bracelet_colors[bracelet_id-1],
            bracelet[1]
        )
        ); 
    }

    function getPurse(uint256 purse_id) internal pure returns(string memory){
        string[2] memory upper_part_purse = ['<circle cy="580" cx="330" r="60" stroke="none"/><circle cy="580" cx="330" r="40" fill="#fff" stroke="none"/>','<rect y="530" x="280" width="100" height="120" stroke-width="8"/><rect y="530" x="290" width="80" height="100" stroke-width="8" fill="#fff"/>'];
        string memory lower_part_purse = '<rect y="580" x="240" width="180" height="120" stroke-width="8" ';
        string[5] memory design_purse = ['fill="#f05de4"/><circle cy="600" cx="340" r="15" fill="#f0b267" stroke-width="8"/><circle cy="650" cx="380" r="20" fill="#f0b267" stroke-width="8"/><circle cy="650" cx="280" r="16" fill="#f0b267" stroke-width="8"/><circle cy="600" cx="400" r="13" fill="#f0b267" stroke-width="8"/>', 
            'fill="#f73149"/><rect y="600" x="260" width="140" height="80" stroke-width="8" fill="#f58822"/><rect y="620" x="280" width="100" height="40" stroke-width="8" fill="#f5c43d"/>', 
            'fill="#9F87FB"/><rect y="650" x="310" width="30" height="30" stroke-width="8" fill="#e06cf5"/><rect y="590" x="350" width="30" height="30" stroke-width="8" fill="#e06cf5"/><rect y="640" x="380" width="30" height="30" stroke-width="8" fill="#e06cf5"/><rect y="610" x="260" width="30" height="30" stroke-width="8" fill="#e06cf5"/>', 
            '<rect y="550" x="240" width="180" height="30" stroke-width="8" fill="#9efa84"/><rect y="580" x="240" width="180" height="30" stroke-width="8" fill="#7ac9fa"/><rect y="610" x="240" width="180" height="30" stroke-width="8" fill="#b67afa"/><rect y="640" x="240" width="180" height="30" stroke-width="8" fill="#ea72f7"/>', 
            '<rect y="560" x="240" width="45" height="120" stroke-width="8" fill="#9efa84"/><rect y="560" x="285" width="45" height="120" stroke-width="8" fill="#7ac9fa"/><rect y="560" x="330" width="45" height="120" stroke-width="8" fill="#b67afa"/><rect y="560" x="375" width="45" height="120" stroke-width="8" fill="#ea72f7"/>'];
  
        if (purse_id == 0){
            return '';
        }
        if (purse_id == 5){
            return string(abi.encodePacked(
            upper_part_purse[1],
            design_purse[4]
        )
        ); 
        }

        if (purse_id == 4){
            return string(abi.encodePacked(
            upper_part_purse[1],
            design_purse[3]
        )
        ); 
        }

        return string(abi.encodePacked(
            upper_part_purse[0],
            lower_part_purse,
            design_purse[purse_id - 1])
        ); 
        
    }

    /**
     * 3 types of eyebrows + None = 4 options
     */
    function getEyeBrows(uint256 eyebrows_id) internal pure returns(string memory){
        string[3] memory rotations_left_eyebrows = ['25', '-25', '0'];
        string[3] memory rotations_right_eyebrows = ['-25', '25', '0'];
        string[3] memory eyebrows = ['<rect transform="rotate(',' 465 350)" height="8" width="80" y="370" x="425" fill="#000000"/><rect transform="rotate(',' 615 350)" height="8" width="80" y="370" x="575" fill="#000000"/>'];
    
    
        if (eyebrows_id%4 == 0){
            return '';
        }
        return string(abi.encodePacked(
            eyebrows[0],
            rotations_left_eyebrows[eyebrows_id%4-1],
            eyebrows[1],
            rotations_right_eyebrows[eyebrows_id%4-1],
            eyebrows[2]
        )
        );
    }

    /**
     * 5 types of hats
     * Should give 30 different combo's: 3 possibilities for up, 2 for down and 5 colors = 6*5=30
     */
    function getHat(uint256 hat_id) internal pure returns(string memory){
        string memory hat_basic = '"/>';
        string[3] memory hat_up = ['<rect y="205" x="475" width="130" height="60" stroke-width="8" fill="#',
            '<rect y="140" x="485" width="110" height="120" stroke-width="8" fill="#',
            '<circle cy="238" cx="540" stroke-width="10" r="62" fill="#'];
        string[2] memory hat_down = ['<rect y="262" x="440" width="200" height="40" stroke-width="8"  fill="#',
            '<ellipse ry="22" rx="70" cy="280" cx="540" stroke-width="8" fill="#'];
        string[5] memory hat_colors_up = ['5fbf00', '000000','e960ff', '56aaff', '5fbf00'];
        string[5] memory hat_colors_down = ['56aaff','ff0000','ff0000', 'ffff93', 'ffff93'];
        if (hat_id == 0){
            return '';
        }
        return string(abi.encodePacked(
            hat_up[hat_id/5%3],
            hat_colors_up[hat_id%5],
            hat_basic,
            hat_down[hat_id/15%2],
            hat_colors_down[hat_id%5],
            hat_basic
        )
        );
    }

    function getGlasses(uint256 glasses_id) internal pure returns(string memory){
        string[8] memory glasses_colors = ['ed4949','ffff56', 'ff7f00', '00bf00', '1900bf', 'e960ff', '68f7ce', '56aaff'];
        string memory glasses_common = '<path stroke-width="4" fill="#';
        string[3] memory small_glasses = ['" d="M492 417h140v20H492z"/><circle cy="427" cx="470" stroke-width="4" r="45" fill="#',
            '"/><circle cy="427" cx="610" stroke-width="4" r="45" fill="#',
            '"/>'];
        string[3] memory big_glasses = ['" d="M492 417h140v20H492z"/><circle cy="427" cx="470" stroke-width="4" r="55" fill="#',
            '"/><circle cy="427" cx="470" stroke-width="4" r="45" fill="#fff"/><circle cy="427" cx="610" stroke-width="4" r="55" fill="#',
            '"/><circle cy="427" cx="610" stroke-width="4" r="45" fill="#fff"/>'];

        string[3] memory square_glasses = ['" d="M492 417h140v20H492z"/><rect x="420" y="377" width="100" height="100" fill="#',
        '" stroke-width="4"/><rect x="430" y="387" width="80" height="80" fill="#fff" stroke-width="4"/><rect x="560" y="377" width="100" height="100" fill="#',
        '" stroke-width="4"/><rect x="570" y="387" width="80" height="80" fill="#fff" stroke-width="4"/>'];

        string memory output;
        if (glasses_id == 0){
            return '';
        }

        else if (glasses_id%3 == 0){
            output = string(abi.encodePacked(
                glasses_common,
                glasses_colors[glasses_id/3%8],
                small_glasses[0]));

            return string(abi.encodePacked(output,
                glasses_colors[glasses_id/3%8],
                small_glasses[1],
                glasses_colors[glasses_id/3%8],
                small_glasses[2]
                ));
        }
        else if (glasses_id%3 == 1){
            output = string(abi.encodePacked(
                glasses_common,
                glasses_colors[glasses_id/3%8],
                big_glasses[0]));

            return string(abi.encodePacked(
                output,
                glasses_colors[glasses_id/3%8],
                big_glasses[1],
                glasses_colors[glasses_id/3%8],
                big_glasses[2]
                ));
        }
        //enabling optimizer: 7 is too deep for stack so split up
        output = string(abi.encodePacked(
                glasses_common,
                glasses_colors[glasses_id/3%8],
                square_glasses[0]));

        return string(abi.encodePacked(
                output,
                glasses_colors[glasses_id/3%8],
                square_glasses[1],
                glasses_colors[glasses_id/3%8],
                square_glasses[2]
                ));
    }


    function getBackground(uint256 id) internal pure returns(string memory){
        string[6] memory colors = ["CEC9DF", "FDF1CA", "EDCCB6", "B2C6DE", "E1E1E1", "C8DCB8"];
        return colors[id%6];
    }

    /**
     * @notice Overridden function which creates custom SVG image
     * 
     */
    function renderTokenById(uint256 tokenId)
        public
        view
        override
        returns (string memory)
    {
        
        require(_exists(tokenId), "Non-Existing");
        uint256 algorithmId = IdToAlgorithmId[tokenId];        

        string memory output = string(abi.encodePacked(frame[0],getBackground(algorithmId % 6), frame[1], frame[2], getGlasses(getGlassesId(algorithmId))));
        output = string(abi.encodePacked(output,
        getHat(getHatId(algorithmId)), 
        getEyeBrows(getEyebrowsId(algorithmId))));
        output = string(abi.encodePacked(output,frame[3], 
        getBracelet(getBraceletId(algorithmId)), 
        getTie(getTieId(algorithmId)), 
        getMagic(getWizardId(algorithmId)),
        getPurse(getPurseId(algorithmId)),
        getWhiskers(getWhiskersId(algorithmId)),
        frame[4]));
        return string(output);
    }


    function getTraits(
        uint256 tokenId
    ) internal view returns (string memory) {
        string memory tr1='[{"trait_type": "Background","value": "';
        string memory tr2='"},{"trait_type": "Bracelet","value": "';
        string memory tr3='"},{"trait_type": "Eyebrows","value": "';
        string memory tr4='"},{"trait_type": "Hat","value": "';
        string memory tr5='"},{"trait_type": "Glasses","value": "';
        string memory tr6='"},{"trait_type": "Tie","value": "';
        string memory tr7='"},{"trait_type": "Wizard","value": "';
        string memory tr8='"},{"trait_type": "Whiskers","value": "';
        string memory tr9='"},{"trait_type": "Purse","value": "';
        string memory tr10='"}]';
        uint256 algorithmId = IdToAlgorithmId[tokenId];
        require(_exists(tokenId), "Non-Existing");
        string memory o=string(abi.encodePacked(tr1,Strings.toString(algorithmId % 6),tr2,Strings.toString(getBraceletId(algorithmId)),tr3,Strings.toString(getEyebrowsId(algorithmId))));
        o = string(abi.encodePacked(o, tr4,Strings.toString(getHatId(algorithmId)),tr5,Strings.toString(getGlassesId(algorithmId)), tr6,Strings.toString(getTieId(algorithmId))));
        return string(abi.encodePacked(o,tr7,Strings.toString(getWizardId(algorithmId)), tr8, Strings.toString(getWhiskersId(algorithmId)), tr9, Strings.toString(getPurseId(algorithmId)),tr10));
    }

    function withdraw() external onlyOwner {
        uint256 balance = address(this).balance;
        require(balance > 0, "0 balance");
        _withdraw(owner(), balance);
    }
    
    
}