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



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (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 anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

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

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

// File: @openzeppelin/contracts/security/ReentrancyGuard.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;

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

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

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be _NOT_ENTERED
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

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

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

// 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/math/Math.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (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) {
                return prod0 / denominator;
            }

            // Make sure the result is less than 2^256. Also prevents denominator == 0.
            require(denominator > prod1);

            ///////////////////////////////////////////////
            // 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 10, 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 * 8) < value ? 1 : 0);
        }
    }
}

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



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

pragma solidity ^0.8.0;

import "./math/Math.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 `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);
    }
}

// File: contracts/ChainMortal.sol



pragma solidity ^0.8.4;

import "erc721a/contracts/ERC721A.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "./ChainmortalFactory.sol";

contract ChainMortal is ERC721A, Ownable, ReentrancyGuard {
    uint256 public price = 0.004 ether;
    bool public forSale = false;
    uint256 supplyCap = 6000;

    mapping(uint256 => uint256) internal idToSeed;

    constructor() ERC721A("Chainmortal", "CM") {}

    function mint(uint256 quantity) external payable {
        require(forSale, "ERROR: Mint not enabled");
        require(quantity < 100, "ERROR: Mint limit Exceeds");
        require(msg.value >= price * quantity, "ERROR: insufficient balance");
        require(
            totalSupply() + quantity <= supplyCap,
            "ERORR: Supply cap reached"
        );

        uint256 nextTokenId = _nextTokenId();

        for (uint32 i; i < quantity; ) {
            idToSeed[nextTokenId] = random(nextTokenId);
            unchecked {
                ++nextTokenId;
                ++i;
            }
        }

        _mint(msg.sender, quantity);
    }

    function tokenURI(
        uint256 tokenId
    ) public view override returns (string memory) {
        require(_exists(tokenId), "ERROR: query for nonexistent token");
        uint256 seed = idToSeed[tokenId];
        return ChainmortalFactory.art(seed, tokenId);
    }

    function toggleSale() external onlyOwner {
        forSale = true;
    }

    function changePrice(uint256 _newPrice) external onlyOwner {
        price = _newPrice;
    }

    function updateSeed(uint256 tokenId, uint256 seed) external onlyOwner {
        idToSeed[tokenId] = seed;
    }

    // function generateSeed(uint256 tokenId) private view returns (uint256) {
    //     uint256 r = random(tokenId);
    //     uint256 topSeed = 100 * ((r % 7) + 10) + (((r >> 48) % 20) + 10);
    //     uint256 eyeSeed = 100 *
    //         (((r >> 96) % 6) + 10) +
    //         (((r >> 96) % 20) + 10);
    //     uint256 nodeSeed = 100 *
    //         (((r >> 144) % 7) + 10) +
    //         (((r >> 144) % 20) + 10);
    //     uint256 mouthSeed = 100 *
    //         (((r >> 192) % 2) + 10) +
    //         (((r >> 192) % 20) + 10);
    //     return
    //         10000 *
    //         (10000 * (10000 * topSeed + eyeSeed) + nodeSeed) +
    //         mouthSeed;
    // }

    function random(
        uint256 tokenId
    ) private view returns (uint256 pseudoRandomness) {
        pseudoRandomness = uint256(
            keccak256(abi.encodePacked(blockhash(block.number - 1), tokenId))
        );
    }

    function withdrawMoney() external onlyOwner nonReentrant {
        (bool success, ) = msg.sender.call{value: address(this).balance}("");
        require(success, "Transfer failed.");
    }
}

// File: contracts/ChainmortalFactory.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/utils/Strings.sol";

library Base64 {
    string internal constant TABLE_ENCODE =
        "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
    bytes internal constant TABLE_DECODE =
        hex"0000000000000000000000000000000000000000000000000000000000000000"
        hex"00000000000000000000003e0000003f3435363738393a3b3c3d000000000000"
        hex"00000102030405060708090a0b0c0d0e0f101112131415161718190000000000"
        hex"001a1b1c1d1e1f202122232425262728292a2b2c2d2e2f303132330000000000";

    function encode(bytes memory data) internal pure returns (string memory) {
        if (data.length == 0) return "";

        // load the table into memory
        string memory table = TABLE_ENCODE;

        // multiply by 4/3 rounded up
        uint256 encodedLen = 4 * ((data.length + 2) / 3);

        // add some extra buffer at the end required for the writing
        string memory result = new string(encodedLen + 32);

        assembly {
            // set the actual output length
            mstore(result, encodedLen)

            // prepare the lookup table
            let tablePtr := add(table, 1)

            // input ptr
            let dataPtr := data
            let endPtr := add(dataPtr, mload(data))

            // result ptr, jump over length
            let resultPtr := add(result, 32)

            // run over the input, 3 bytes at a time
            for {

            } lt(dataPtr, endPtr) {

            } {
                // read 3 bytes
                dataPtr := add(dataPtr, 3)
                let input := mload(dataPtr)

                // write 4 characters
                mstore8(
                    resultPtr,
                    mload(add(tablePtr, and(shr(18, input), 0x3F)))
                )
                resultPtr := add(resultPtr, 1)
                mstore8(
                    resultPtr,
                    mload(add(tablePtr, and(shr(12, input), 0x3F)))
                )
                resultPtr := add(resultPtr, 1)
                mstore8(
                    resultPtr,
                    mload(add(tablePtr, and(shr(6, input), 0x3F)))
                )
                resultPtr := add(resultPtr, 1)
                mstore8(resultPtr, mload(add(tablePtr, and(input, 0x3F))))
                resultPtr := add(resultPtr, 1)
            }

            // padding with '='
            switch mod(mload(data), 3)
            case 1 {
                mstore(sub(resultPtr, 2), shl(240, 0x3d3d))
            }
            case 2 {
                mstore(sub(resultPtr, 1), shl(248, 0x3d))
            }
        }

        return result;
    }

    function decode(string memory _data) internal pure returns (bytes memory) {
        bytes memory data = bytes(_data);

        if (data.length == 0) return new bytes(0);
        require(data.length % 4 == 0, "invalid base64 decoder input");

        // load the table into memory
        bytes memory table = TABLE_DECODE;

        // every 4 characters represent 3 bytes
        uint256 decodedLen = (data.length / 4) * 3;

        // add some extra buffer at the end required for the writing
        bytes memory result = new bytes(decodedLen + 32);

        assembly {
            // padding with '='
            let lastBytes := mload(add(data, mload(data)))
            if eq(and(lastBytes, 0xFF), 0x3d) {
                decodedLen := sub(decodedLen, 1)
                if eq(and(lastBytes, 0xFFFF), 0x3d3d) {
                    decodedLen := sub(decodedLen, 1)
                }
            }

            // set the actual output length
            mstore(result, decodedLen)

            // prepare the lookup table
            let tablePtr := add(table, 1)

            // input ptr
            let dataPtr := data
            let endPtr := add(dataPtr, mload(data))

            // result ptr, jump over length
            let resultPtr := add(result, 32)

            // run over the input, 4 characters at a time
            for {

            } lt(dataPtr, endPtr) {

            } {
                // read 4 characters
                dataPtr := add(dataPtr, 4)
                let input := mload(dataPtr)

                // write 3 bytes
                let output := add(
                    add(
                        shl(
                            18,
                            and(
                                mload(add(tablePtr, and(shr(24, input), 0xFF))),
                                0xFF
                            )
                        ),
                        shl(
                            12,
                            and(
                                mload(add(tablePtr, and(shr(16, input), 0xFF))),
                                0xFF
                            )
                        )
                    ),
                    add(
                        shl(
                            6,
                            and(
                                mload(add(tablePtr, and(shr(8, input), 0xFF))),
                                0xFF
                            )
                        ),
                        and(mload(add(tablePtr, and(input, 0xFF))), 0xFF)
                    )
                )
                mstore(resultPtr, shl(232, output))
                resultPtr := add(resultPtr, 3)
            }
        }

        return result;
    }
}

library ChainmortalFactory {

    using Strings for uint256;

    string private constant SVG_END_TAG = "</svg>";

    function charcterType(uint256 _seed) public pure returns (string memory) {
        uint256 rand = uint256(keccak256(abi.encodePacked(_seed))) % 1e18;
        uint256 id = ((rand / 1e16) % 1e2) % 10;

        if (id == 0) {
            return "Face0";
        } else if (id == 1) {
            return "Face1";
        } else if (id == 2) {
            return "Face2";
        } else if (id == 3) {
            return "Face3";
        } else if (id == 4) {
            return "Face4";
        } else if (id == 5) {
            return "Face5";
        } else if (id == 6) {
            return "Face6";
        } else if (id == 7) {
            return "Face7";
        } else if (id == 8) {
            return "Face8";
        } else if (id == 9) {
            return "Face9";
        } else {
            return string(abi.encodePacked("ERROR"));
        }
    }

    function art(uint256 _seed,uint256 _tokenId) public pure returns (string memory) {
        uint256 characterDNA = uint256(keccak256(abi.encodePacked(_seed))) %
            1e18;
        uint256 colorGene = ((characterDNA / 1e12) % 1e2) % 13;

        string[4][13] memory colors = [
            [
                unicode"#5f005f",
                unicode"#5f0087",
                unicode"#5f00af",
                unicode"#5f00d7"
            ],
            [
                unicode"#af005f",
                unicode"#af0087",
                unicode"#af00af",
                unicode"#af00d7"
            ],
            [unicode"#FFF", unicode"#FFF", unicode"#FFF", unicode"#FFF"],
            [
                unicode"#ff005f",
                unicode"#ff0087",
                unicode"#ff00af",
                unicode"#ff00d7"
            ],
            [
                unicode"#ff5f00",
                unicode"#ff5f5f",
                unicode"#ff5f87",
                unicode"#ff5faf"
            ],
            [
                unicode"#ff875f",
                unicode"#ff8787",
                unicode"#ff87af",
                unicode"#ff87d7"
            ],
            [unicode"#FFF", unicode"#FFF", unicode"#FFF", unicode"#FFF"],
            [
                unicode"#0087ff",
                unicode"#5f87ff",
                unicode"#8787ff",
                unicode"#af87ff"
            ],
            [
                unicode"#00af00",
                unicode"#5faf00",
                unicode"#87af00",
                unicode"#afaf00"
            ],
            [unicode"#FFF", unicode"#FFF", unicode"#FFF", unicode"#FFF"],
            [
                unicode"#00ffff",
                unicode"#5fffff",
                unicode"#87ffff",
                unicode"#afffff"
            ],
            [
                unicode"#00d7ff",
                unicode"#5fd7ff",
                unicode"#87d7ff",
                unicode"#afd7ff"
            ],
            [
                unicode"#00ff5f",
                unicode"#5fff5f",
                unicode"#87ff5f",
                unicode"#afff5f"
            ]
        ];

        string memory hair = _chooseTops(characterDNA, colors[colorGene][0]);
        string memory brows = _chooseEyeBrows(characterDNA);
        string memory eyes = _chooseEyes(characterDNA);
        string memory nose = _chooseNose(characterDNA, colors[colorGene][3]);
        string memory mouth = _chooseMouth(characterDNA, colors[colorGene][3]);
        string memory rawSvg = string(
            abi.encodePacked(
                '<svg width="320" height="320" viewBox="0 0 320 320" xmlns="http://www.w3.org/2000/svg">',
                '<rect width="100%" height="100%" fill="#121212"/>',
                '<text x="160" y="80" font-family="Courier,monospace" font-weight="700" font-size="20" text-anchor="middle" letter-spacing="1">',
                hair,
                string(
                    abi.encodePacked(
                        '<tspan dy="20" x="160" fill="',
                        colors[colorGene][1],
                        '">',
                        brows,
                        "</tspan>"
                    )
                ),
                string(
                    abi.encodePacked(
                        '<tspan dy="25" x="160" fill="',
                        colors[colorGene][2],
                        '">',
                        eyes,
                        "</tspan>"
                    )
                ),
                nose,
                mouth,
                "</text>",
                SVG_END_TAG
            )
        );
        string memory encodedSvg = Base64.encode(bytes(rawSvg));
        string memory description = "Chainmortal";

        return
            string(
                abi.encodePacked(
                   
                    "data:application/json;base64,",
                    Base64.encode(
                        bytes(
                            abi.encodePacked(
                                "{",
                                '"name":"Chainmortal #', _tokenId.toString(), '",',
                                '"description":"',
                                description,
                                '",',
                                '"image": "',
                                "data:image/svg+xml;base64,",
                                encodedSvg,
                                '",',
                                "}"
                            )
                        )
                    )
                )
            );
    }

    function _chooseTops(
        uint256 characterDNA,
        string memory _color
    ) internal pure returns (string memory) {
        string[27] memory hairs = [
            string(
                abi.encodePacked(
                    '<tspan fill="',
                    _color,
                    '">',
                    unicode"       ",
                     "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    "_______",
                    "</tspan>"
                )
            ),
            string(
                abi.encodePacked(
                    '<tspan fill="',
                    _color,
                    '">',
                    unicode"       ",
                     "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    "///////",
                    "</tspan>"
                )
            ),
            string(
                abi.encodePacked(
                    '<tspan fill="',
                    _color,
                    '">',
                    unicode"       ",
                     "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    "!!!!!!!",
                    "</tspan>"
                )
            ),
            string(
                abi.encodePacked(
                    '<tspan fill="',
                    _color,
                    '">',
                    unicode"       ",
                     "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode"║║║║║║║",
                    "</tspan>"
                )
            ),
            string(
                abi.encodePacked(
                    '<tspan fill="',
                    _color,
                    '">',
                    unicode"       ",
                     "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode"▄▄▄▄▄▄▄",
                    "</tspan>"
                )
            ),
            string(
                abi.encodePacked(
                    '<tspan fill="',
                    _color,
                    '">',
                    unicode"       ",
                     "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode"███████",
                    "</tspan>"
                )
            ),
            string(
                abi.encodePacked(
                    '<tspan fill="',
                    _color,
                    '">',
                    unicode"┌─────┐",
                    "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode"│     │",
                    "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode"─┴─────┴─",
                    "</tspan>"
                )
            ),
            string(
                abi.encodePacked(
                    '<tspan fill="',
                    _color,
                    '">',
                    unicode"┌─────┐",
                    "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode"├─────│",
                    "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode"─┴─────┴─",
                    "</tspan>"
                )
            ),
            string(
                abi.encodePacked(
                    '<tspan fill="',
                    _color,
                    '">',
                    unicode"┌▄▄▄▄▄┐",
                    "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode"├─────┤",
                    "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode"─┴─────┴─",
                    "</tspan>"
                )
            ),
            string(
                abi.encodePacked(
                    '<tspan fill="',
                    _color,
                    '">',
                    unicode"┌─────┐",
                    "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode"├─────┤",
                    "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode"─┴▀▀▀▀▀┴─",
                    "</tspan>"
                )
            ),
            string(
                abi.encodePacked(
                    '<tspan fill="',
                    _color,
                    '">',
                    unicode"┌▄▄▄▄▄┐",
                    "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode"├─────┤",
                    "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode"─┴▀▀▀▀▀┴─",
                    "</tspan>"
                )
            ),
            string(
                abi.encodePacked(
                    '<tspan fill="',
                    _color,
                    '">',
                    unicode"┌▄▄▄▄▄┐",
                    "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode"├█████┤",
                    "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode"─┴▀▀▀▀▀┴─",
                    "</tspan>"
                )
            ),
            string(
                abi.encodePacked(
                    '<tspan fill="',
                    _color,
                    '">',
                    unicode"┌─────┐",
                    "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode"│     │",
                    "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode"─┴▀▀▀▀▀┴─",
                    "</tspan>"
                )
            ),
            string(
                abi.encodePacked(
                    '<tspan fill="',
                    _color,
                    '">',
                    unicode"       ",
                    "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode"┌─────┐",
                    "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode"─┴─────┴─",
                    "</tspan>"
                )
            ),
            string(
                abi.encodePacked(
                    '<tspan fill="',
                    _color,
                    '">',
                    unicode"       ",
                    "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode"┌─────┐",
                    "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode"─┴▀▀▀▀▀┴─",
                    "</tspan>"
                )
            ),
            string(
                abi.encodePacked(
                    '<tspan fill="',
                    _color,
                    '">',
                    unicode"       ",
                    "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode" /███  ",
                    "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode"─┴▀▀▀▀▀┴─",
                    "</tspan>"
                )
            ),
            string(
                abi.encodePacked(
                    '<tspan fill="',
                    _color,
                    '">',
                    unicode"       ",
                    "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode" /▓▓▓  ",
                    "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode"─┴▀▀▀▀▀┴─",
                    "</tspan>"
                )
            ),
            string(
                abi.encodePacked(
                    '<tspan fill="',
                    _color,
                    '">',
                    unicode"       ",
                    "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode" ┌───┐ ",
                    "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode"└─┴─────┴──",
                    "</tspan>"
                )
            ),
            string(
                abi.encodePacked(
                    '<tspan fill="',
                    _color,
                    '">',
                    unicode"       ",
                    "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode" ┌───┐/'",
                    "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode"└─┴─────┴──",
                    "</tspan>"
                )
            ),
            string(
                abi.encodePacked(
                    '<tspan fill="',
                    _color,
                    '">',
                    unicode"       ",
                    "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode"  .▄▄▄.",
                    "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode"└─┴▀▀▀▀▀┴──",
                    "</tspan>"
                )
            ),
            string(
                abi.encodePacked(
                    '<tspan fill="',
                    _color,
                    '">',
                    unicode"     ,/",
                    "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode".▄▄▄./'",
                    "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode"└─┴▀▀▀▀▀┴──",
                    "</tspan>"
                )
            ),
            string(
                abi.encodePacked(
                    '<tspan fill="',
                    _color,
                    '">',
                    unicode"       ",
                    "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode" /ˇˇˇ  ",
                    "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode"┴─────┴",
                    "</tspan>"
                )
            ),
            string(
                abi.encodePacked(
                    '<tspan fill="',
                    _color,
                    '">',
                    unicode"┌─────┐",
                    "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode"┌┴─────┴┐",
                    "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode"└───────┘",
                    "</tspan>"
                )
            ),
            string(
                abi.encodePacked(
                    '<tspan fill="',
                    _color,
                    '">',
                    unicode"       ",
                    "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode"┌─────┐",
                    "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode"|░░░░░░░|",
                    "</tspan>"
                )
            ),
            string(
                abi.encodePacked(
                    '<tspan fill="',
                    _color,
                    '">',
                    unicode" ,.O., ",
                    "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode" /»»»»» ",
                    "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode"/«««««««",
                    "</tspan>"
                )
            ),
            string(
                abi.encodePacked(
                    '<tspan fill="',
                    _color,
                    '">',
                    unicode" ,.O.,",
                    "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode"/AAAAA",
                    "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode"/VVVVVVV",
                    "</tspan>"
                )
            ),
            string(
                abi.encodePacked(
                    '<tspan fill="',
                    _color,
                    '">',
                    unicode" ,.O.,",
                    "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode"/WWWWW",
                    "</tspan>",
                    '<tspan dy="20" x="160" fill="',
                    _color,
                    '">',
                    unicode"/MMMMMMM",
                    "</tspan>"
                )
            )
        ];

        uint256 topsGene = ((characterDNA / 1e8) % 1e2) % 27;

        return string(abi.encodePacked(hairs[topsGene]));
    }

    function _chooseEyeBrows(
        uint256 characterDNA
    ) internal pure returns (string memory) {
        uint256 id = ((characterDNA / 1e16) % 1e2) % 10;
        uint256 browsGene = ((characterDNA / 1e6) % 1e2) % 3;
        string[3] memory brows = [unicode"_", unicode"~", unicode"¬"];
        string memory leftBrow = brows[browsGene];
        string memory rightBrow = brows[browsGene];

        if (id == 0) {
            return
                string(
                    abi.encodePacked("# ", leftBrow, "   ", rightBrow, " #")
                );
        } else if (id == 1) {
            return
                string(
                    abi.encodePacked("! ", leftBrow, "   ", rightBrow, " !")
                );
        } else if (id == 2) {
            return
                string(
                    abi.encodePacked("| ", leftBrow, "   ", rightBrow, " |")
                );
        } else if (id == 3) {
            return
                string(
                    abi.encodePacked("{ ", leftBrow, "   ", rightBrow, " }")
                );
        } else if (id == 4) {
            return
                string(
                    abi.encodePacked(
                        unicode"║ ",
                        leftBrow,
                        "   ",
                        rightBrow,
                        unicode" ║"
                    )
                );
        } else if (id == 5) {
            return
                string(
                    abi.encodePacked(
                        unicode"# ",
                        leftBrow,
                        "   ",
                        rightBrow,
                        unicode" #"
                    )
                );
        } else if (id == 6) {
            return
                string(
                    abi.encodePacked(
                        unicode") ",
                        leftBrow,
                        "   ",
                        rightBrow,
                        unicode" )"
                    )
                );
        } else if (id == 7) {
            return
                string(
                    abi.encodePacked("(# ", leftBrow, "   ", rightBrow, " #)")
                );
        } else if (id == 8) {
            return
                string(
                    abi.encodePacked(
                        unicode"|  ",
                        leftBrow,
                        "   ",
                        rightBrow,
                        unicode"  |"
                    )
                );
        } else if (id == 9) {
            return
                string(
                    abi.encodePacked(
                        unicode"|  ",
                        leftBrow,
                        "   ",
                        rightBrow,
                        unicode"  |"
                    )
                );
        } else {
            return string(abi.encodePacked("ERROR"));
        }
    }

    function _chooseEyes(
        uint256 characterDNA
    ) internal pure returns (string memory) {
        uint256 id = ((characterDNA / 1e16) % 1e2) % 10;
        uint256 eyeGene = ((characterDNA / 1e4) % 1e2) % 22;
        uint256 isEyeOrGlassGene = ((characterDNA / 1e10) % 1e2) % 2;

        if (isEyeOrGlassGene % 2 == 0 && id != 9) {
            return _chooseGlasses(characterDNA, id);
        }

        string[22] memory Eyes = [
            unicode"0",
            unicode"9",
            unicode"o",
            unicode"O",
            unicode"p",
            unicode"P",
            unicode"q",
            unicode"°",
            unicode"Q",
            unicode"Ö",
            unicode"ö",
            unicode"ó",
            unicode"Ô",
            unicode"■",
            unicode"Ó",
            unicode"Ő",
            unicode"ő",
            unicode"○",
            unicode"╬",
            unicode"♥",
            unicode"¤",
            unicode"đ"
        ];

        string memory leftEye = Eyes[eyeGene];
        string memory rightEye = Eyes[eyeGene];

        if (id == 0) {
            return
                string(
                    abi.encodePacked("d| ", leftEye, "   ", rightEye, " |b")
                );
        } else if (id == 1) {
            return
                string(
                    abi.encodePacked(
                        unicode"«│ ",
                        leftEye,
                        "   ",
                        rightEye,
                        unicode" │»"
                    )
                );
        } else if (id == 2) {
            return
                string(abi.encodePacked("( ", leftEye, "   ", rightEye, " )"));
        } else if (id == 3) {
            return
                string(
                    abi.encodePacked("d| ", leftEye, "   ", rightEye, " |b")
                );
        } else if (id == 4) {
            return
                string(
                    abi.encodePacked(
                        unicode"d║ ",
                        leftEye,
                        "   ",
                        rightEye,
                        unicode" ║b"
                    )
                );
        } else if (id == 5) {
            return
                string(
                    abi.encodePacked(
                        unicode"d| ",
                        leftEye,
                        "   ",
                        rightEye,
                        unicode" |b"
                    )
                );
        } else if (id == 6) {
            return
                string(
                    abi.encodePacked(
                        unicode"( ",
                        leftEye,
                        "   ",
                        rightEye,
                        unicode" ("
                    )
                );
        } else if (id == 7) {
            return
                string(
                    abi.encodePacked(
                        unicode"@| ",
                        leftEye,
                        "   ",
                        rightEye,
                        unicode" |@"
                    )
                );
        } else if (id == 8) {
            return
                string(
                    abi.encodePacked(
                        unicode"|\\|  ",
                        leftEye,
                        "   ",
                        rightEye,
                        unicode"  |/|"
                    )
                );
        } else if (id == 9) {
            return
                string(
                    abi.encodePacked(
                        unicode"\\ (",
                        leftEye,
                        "   ",
                        rightEye,
                        unicode") /"
                    )
                );
        } else {
            return string(abi.encodePacked("ERROR"));
        }
    }

    function _chooseNose(
        uint256 characterDNA,
        string memory _color
    ) internal pure returns (string memory) {
        uint256 id = ((characterDNA / 1e16) % 1e2) % 10;
        uint256 noseGene = characterDNA % 13;

        string[13] memory noses = [
            ">",
            "V",
            "v",
            "u",
            "c",
            "C",
            unicode"┴",
            "L",
            unicode"Ł",
            unicode"└",
            unicode"┘",
            unicode"╚",
            unicode"╝"
        ];

        if (id == 0) {
            return
                string(
                    abi.encodePacked(
                        '<tspan dy="25" x="160" fill="',
                        _color,
                        '">',
                        "(   ",
                        noses[noseGene],
                        "   )",
                        "</tspan>"
                    )
                );
        } else if (id == 1) {
            return
                string(
                    abi.encodePacked(
                        '<tspan dy="25" x="160" fill="',
                        _color,
                        '">',
                        "\\   ",
                        noses[noseGene],
                        "   /",
                        "</tspan>"
                    )
                );
        } else if (id == 2) {
            return
                string(
                    abi.encodePacked(
                        '<tspan dy="25" x="160" fill="',
                        _color,
                        '">',
                        "(    ",
                        noses[noseGene],
                        "    )",
                        "</tspan>"
                    )
                );
        } else if (id == 3) {
            return
                string(
                    abi.encodePacked(
                        '<tspan dy="25" x="160" fill="',
                        _color,
                        '">',
                        "\\   ",
                        noses[noseGene],
                        "   /",
                        "</tspan>"
                    )
                );
        } else if (id == 4) {
            return
                string(
                    abi.encodePacked(
                        '<tspan dy="25" x="160" fill="',
                        _color,
                        '">',
                        unicode"║   ",
                        noses[noseGene],
                        unicode"   ║",
                        "</tspan>"
                    )
                );
        } else if (id == 5) {
            return
                string(
                    abi.encodePacked(
                        '<tspan dy="25" x="160" fill="',
                        _color,
                        '">',
                        unicode"(   ",
                        noses[noseGene],
                        unicode"   )",
                        "</tspan>"
                    )
                );
        } else if (id == 6) {
            return
                string(
                    abi.encodePacked(
                        '<tspan dy="25" x="160" fill="',
                        _color,
                        '">',
                        unicode")   ",
                        noses[noseGene],
                        unicode"    )",
                        "</tspan>"
                    )
                );
        } else if (id == 7) {
            return
                string(
                    abi.encodePacked(
                        '<tspan dy="25" x="160" fill="',
                        _color,
                        '">',
                        "(/   ",
                        noses[noseGene],
                        "   \\)",
                        "</tspan>"
                    )
                );
        } else if (id == 8) {
            return
                string(
                    abi.encodePacked(
                        '<tspan dy="25" x="160" fill="',
                        _color,
                        '">',
                        unicode"\\│    ",
                        noses[noseGene],
                        unicode"    │/",
                        "</tspan>"
                    )
                );
        } else if (id == 9) {
            return
                string(
                    abi.encodePacked(
                        '<tspan dy="25" x="160" fill="',
                        _color,
                        '">',
                        "'. /V\\ ,'",
                        "</tspan>"
                    )
                );
        } else {
            return string(abi.encodePacked("ERROR"));
        }
    }

    function _chooseMouth(
        uint256 characterDNA,
        string memory _color
    ) internal pure returns (string memory) {
        uint256 id = ((characterDNA / 1e16) % 1e2) % 10;
        uint256 mouthGene = ((characterDNA / 1e0) % 1e2) % 5;

        string[5] memory mouths = [
            unicode"---",
            unicode"___",
            unicode"===",
            unicode"~~~",
            unicode"═══"
        ];

        if (id == 0) {
            return
                string(
                    abi.encodePacked(
                        '<tspan dy="25" x="160" fill="',
                        _color,
                        '">',
                        ") ",
                        mouths[mouthGene],
                        " (",
                        "</tspan>",
                        '<tspan dy="25" x="160" fill="',
                        _color,
                        '">',
                        unicode"(_____)",
                        "</tspan>"
                    )
                );
        } else if (id == 1) {
            return
                string(
                    abi.encodePacked(
                        '<tspan dy="25" x="160" fill="',
                        _color,
                        '">',
                        unicode"├ ",
                        mouths[mouthGene],
                        unicode" ┤",
                        "</tspan>",
                        '<tspan dy="25" x="160" fill="  ',
                        _color,
                        '">',
                        unicode"'───'",
                        "</tspan>"
                    )
                );
        } else if (id == 2) {
            return
                string(
                    abi.encodePacked(
                        '<tspan dy="25" x="160" fill="',
                        _color,
                        '">',
                        unicode"\\  ",
                        mouths[mouthGene],
                        unicode"  /",
                        "</tspan>",
                        '<tspan dy="25" x="160" fill="',
                        _color,
                        '">',
                        unicode"\\ˍˍˍ/",
                        "</tspan>"
                    )
                );
        } else if (id == 3) {
            return
                string(
                    abi.encodePacked(
                        '<tspan dy="25" x="160" fill="',
                        _color,
                        '">',
                        unicode"{ ",
                        mouths[mouthGene],
                        unicode" }",
                        "</tspan>",
                        '<tspan dy="25" x="160" fill="',
                        _color,
                        '">',
                        unicode"└~~~┘",
                        "</tspan>"
                    )
                );
        } else if (id == 4) {
            return
                string(
                    abi.encodePacked(
                        '<tspan dy="25" x="160" fill="',
                        _color,
                        '">',
                        unicode"╚╗ ",
                        mouths[mouthGene],
                        unicode" ╔╝",
                        "</tspan>",
                        '<tspan dy="25" x="160" fill="',
                        _color,
                        '">',
                        unicode"╚═════╝",
                        "</tspan>"
                    )
                );
        } else if (id == 5) {
            return
                string(
                    abi.encodePacked(
                        '<tspan dy="25" x="160" fill="',
                        _color,
                        '">',
                        unicode"|\\ ",
                        mouths[mouthGene],
                        unicode" /|",
                        "</tspan>",
                        '<tspan dy="25" x="160" fill="',
                        _color,
                        '">',
                        unicode"\\_‿_/",
                        "</tspan>"
                    )
                );
        } else if (id == 6) {
            return
                string(
                    abi.encodePacked(
                        '<tspan dy="25" x="160" fill="',
                        _color,
                        '">',
                        unicode"(   ",
                        mouths[mouthGene],
                        unicode"  (",
                        "</tspan>",
                        '<tspan dy="25" x="160" fill="',
                        _color,
                        '">',
                        unicode"`─ ─ ─ ─´",
                        "</tspan>"
                    )
                );
        } else if (id == 7) {
            return
                string(
                    abi.encodePacked(
                        '<tspan dy="25" x="160" fill="',
                        _color,
                        '">',
                        unicode"(|  ",
                        mouths[mouthGene],
                        unicode"  |)",
                        "</tspan>",
                        '<tspan dy="25" x="160" fill="',
                        _color,
                        '">',
                        unicode"`─────´",
                        "</tspan>"
                    )
                );
        } else if (id == 8) {
            return
                string(
                    abi.encodePacked(
                        '<tspan dy="25" x="160" fill="',
                        _color,
                        '">',
                        unicode"\\  ",
                        mouths[mouthGene],
                        unicode"  /",
                        "</tspan>",
                        '<tspan dy="25" x="160" fill="',
                        _color,
                        '">',
                        unicode"\\___/",
                        "</tspan>"
                    )
                );
        } else if (id == 9) {
            return
                string(
                    abi.encodePacked(
                        '<tspan dy="25" x="160" fill="',
                        _color,
                        '">',
                        unicode"\\ ",
                        mouths[mouthGene],
                        unicode" /",
                        "</tspan>",
                        '<tspan dy="25" x="160" fill="',
                        _color,
                        '">',
                        unicode"'---'",
                        "</tspan>"
                    )
                );
        } else {
            return string(abi.encodePacked("ERROR"));
        }
    }

    function _chooseGlasses(
        uint256 characterDNA,
        uint256 id
    ) internal pure returns (string memory) {
        uint256 glassesGene = ((characterDNA / 1e4) % 1e2) % 16;

        string[16] memory glasses = [
            unicode"-O---O-",
            unicode"-O-_-O-",
            unicode"-┴┴-┴┴-",
            unicode"-┬┬-┬┬-",
            unicode"-▄---▄-",
            unicode"-▄-_-▄-",
            unicode"-▀---▀-",
            unicode"-▀-_-▀-",
            unicode"-█---█-",
            unicode"-█-_-█-",
            unicode"-▓---▓-",
            unicode"-▓-_-▓-",
            unicode"-▒---▒-",
            unicode"-▒-_-▒-",
            unicode"-░---░-",
            unicode"-░-_-░-"
        ];

        string memory glass = glasses[glassesGene];

        if (id == 0) {
            return string(abi.encodePacked("   d|", glass, "|b", unicode" \n"));
        } else if (id == 1) {
            return string(abi.encodePacked(unicode"«│", glass, unicode"│»"));
        } else if (id == 2) {
            return string(abi.encodePacked("(", glass, ")"));
        } else if (id == 3) {
            return string(abi.encodePacked("d|", glass, "|b"));
        } else if (id == 4) {
            return string(abi.encodePacked(unicode"d║", glass, unicode"║b"));
        } else if (id == 5) {
            return string(abi.encodePacked(unicode"d|", glass, unicode"|b"));
        } else if (id == 6) {
            return string(abi.encodePacked(unicode"(", glass, unicode"("));
        } else if (id == 7) {
            return string(abi.encodePacked(unicode"@| ", glass, unicode" |@"));
        } else if (id == 8) {
            return
                string(abi.encodePacked(unicode"|\\| ", glass, unicode" |/|"));
        } else if (id == 9) {
            return string(abi.encodePacked(unicode"\\  ", glass, unicode"  /"));
        } else {
            return string(abi.encodePacked("ERROR"));
        }
    }
}

// File: erc721a/contracts/ERC721A.sol



// SPDX-License-Identifier: MIT
// ERC721A Contracts v4.2.3
// Creator: Chiru Labs

pragma solidity ^0.8.4;

import './IERC721A.sol';

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

/**
 * @title ERC721A
 *
 * @dev Implementation of the [ERC721](https://eips.ethereum.org/EIPS/eip-721)
 * Non-Fungible Token Standard, including the Metadata extension.
 * Optimized for lower gas during batch mints.
 *
 * Token IDs are minted in sequential order (e.g. 0, 1, 2, 3, ...)
 * starting from `_startTokenId()`.
 *
 * Assumptions:
 *
 * - An owner cannot have more than 2**64 - 1 (max value of uint64) of supply.
 * - The maximum token ID cannot exceed 2**256 - 1 (max value of uint256).
 */
contract ERC721A is IERC721A {
    // Bypass for a `--via-ir` bug (https://github.com/chiru-labs/ERC721A/pull/364).
    struct TokenApprovalRef {
        address value;
    }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

    // Token name
    string private _name;

    // Token symbol
    string private _symbol;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

        return _tokenApprovals[tokenId].value;
    }

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

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

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

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

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

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

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

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

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

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

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

        _beforeTokenTransfers(from, to, tokenId, 1);

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

            uint256 toMasked;
            uint256 end = startTokenId + quantity;

            // Use assembly to loop and emit the `Transfer` event for gas savings.
            // The duplicated `log4` removes an extra check and reduces stack juggling.
            // The assembly, together with the surrounding Solidity code, have been
            // delicately arranged to nudge the compiler into producing optimized opcodes.
            assembly {
                // Mask `to` to the lower 160 bits, in case the upper bits somehow aren't clean.
                toMasked := and(to, _BITMASK_ADDRESS)
                // Emit the `Transfer` event.
                log4(
                    0, // Start of data (0, since no data).
                    0, // End of data (0, since no data).
                    _TRANSFER_EVENT_SIGNATURE, // Signature.
                    0, // `address(0)`.
                    toMasked, // `to`.
                    startTokenId // `tokenId`.
                )

                // The `iszero(eq(,))` check ensures that large values of `quantity`
                // that overflows uint256 will make the loop run out of gas.
                // The compiler will optimize the `iszero` away for performance.
                for {
                    let tokenId := add(startTokenId, 1)
                } iszero(eq(tokenId, end)) {
                    tokenId := add(tokenId, 1)
                } {
                    // Emit the `Transfer` event. Similar to above.
                    log4(0, 0, _TRANSFER_EVENT_SIGNATURE, 0, toMasked, tokenId)
                }
            }
            if (toMasked == 0) revert MintToZeroAddress();

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

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

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

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

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

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

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

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

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

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

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

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

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

        address from = address(uint160(prevOwnershipPacked));

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

    /**
     * @dev Converts a uint256 to its ASCII string decimal representation.
     */
    function _toString(uint256 value) internal pure virtual returns (string memory str) {
        assembly {
            // The maximum value of a uint256 contains 78 digits (1 byte per digit), but
            // we allocate 0xa0 bytes to keep the free memory pointer 32-byte word aligned.
            // We will need 1 word for the trailing zeros padding, 1 word for the length,
            // and 3 words for a maximum of 78 digits. Total: 5 * 0x20 = 0xa0.
            let m := add(mload(0x40), 0xa0)
            // Update the free memory pointer to allocate.
            mstore(0x40, m)
            // Assign the `str` to the end.
            str := sub(m, 0x20)
            // Zeroize the slot after the string.
            mstore(str, 0)

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

            // We write the string from rightmost digit to leftmost digit.
            // The following is essentially a do-while loop that also handles the zero case.
            // prettier-ignore
            for { let temp := value } 1 {} {
                str := sub(str, 1)
                // Write the character to the pointer.
                // The ASCII index of the '0' character is 48.
                mstore8(str, add(48, mod(temp, 10)))
                // Keep dividing `temp` until zero.
                temp := div(temp, 10)
                // prettier-ignore
                if iszero(temp) { break }
            }

            let length := sub(end, str)
            // Move the pointer 32 bytes leftwards to make room for the length.
            str := sub(str, 0x20)
            // Store the length.
            mstore(str, length)
        }
    }
}

// File: erc721a/contracts/IERC721A.sol



// SPDX-License-Identifier: MIT
// ERC721A Contracts v4.2.3
// Creator: Chiru Labs

pragma solidity ^0.8.4;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

    /**
     * @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 payable;

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

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

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

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

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

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

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

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

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