Contract Source Code (Solidity Standard Json-Input format)

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// SPDX-License-Identifier: MIT

pragma solidity ^0.8.12;

import "erc721a/contracts/ERC721A.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "./Utilities.sol";
import "./Renderer.sol";
import "svgnft/contracts/Base64.sol";

contract SolarSystems is ERC721A, Ownable {
  uint256 public price;
  uint256 public maxSupply;
  Renderer public renderer;

  /**
   * @dev Constructs a new instance of the contract.
   * @param _name Name of the ERC721 token.
   * @param _symbol Symbol of the ERC721 token.
   * @param _price Price of each solar system in wei.
   * @param _maxSupply Maximum supply of solar systems.
   */
  constructor(
    string memory _name,
    string memory _symbol,
    uint256 _price,
    uint256 _maxSupply,
    address _renderer
  ) ERC721A(_name, _symbol) {
    price = _price;
    maxSupply = _maxSupply;
    renderer = Renderer(_renderer);
  }

  /**
   * @notice Sets the price of each solar system in wei.
   * @param _price Price of each solar system in wei.
   */
  function setPrice(uint256 _price) external onlyOwner {
    price = _price;
  }

  /**
   * @notice Returns the token URI for a given token ID.
   * @param tokenId ID of the token to get the URI for.
   * @return Token URI.
   */
  function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
    if (!_exists(tokenId)) revert URIQueryForNonexistentToken();

    string memory name = string(abi.encodePacked("Solar System #", utils.uint2str(tokenId)));
    string memory description = "Fully on-chain, procedurally generated, animated solar systems.";
    string memory svg = renderer.getSVG(tokenId);

    string memory json = string(
      abi.encodePacked(
        '{"name":"',
        name,
        '","description":"',
        description,
        '","attributes":[{"trait_type":"Planets","value":"',
        utils.uint2str(renderer.numPlanetsForTokenId(tokenId)),
        '"}, {"trait_type":"Ringed Planets", "value": "',
        utils.uint2str(renderer.numRingedPlanetsForTokenId(tokenId)),
        '"}, {"trait_type":"Star Type", "value": "',
        renderer.hasRareStarForTokenId(tokenId) ? "Blue" : "Normal",
        '"}], "image": "data:image/svg+xml;base64,',
        Base64.encode(bytes(svg)),
        '"}'
      )
    );
    return string(abi.encodePacked("data:application/json;base64,", Base64.encode(bytes(json))));
  }

  /**
   * @notice Mints new solar systems for the caller.
   * @param _quantity Quantity of solar systems to mint.
   */
  function mint(uint256 _quantity) external payable {
    require(msg.value >= price * _quantity, "Insufficient fee");
    require(totalSupply() + _quantity <= maxSupply, "Exceeds max supply");
    _mint(msg.sender, _quantity);
  }

  /**
   * @notice  Airdrops solar systems to a list of recipients. Only callable by the contract owner.
   * @param _recipients List of recipients to receive the airdrop.
   * @param _quantity Quantity of solar systems to airdrop to each recipient.
   */
  function airdrop(address[] memory _recipients, uint256 _quantity) external payable onlyOwner {
    require(totalSupply() + _quantity * _recipients.length <= maxSupply, "Exceeds max supply");
    for (uint256 i = 0; i < _recipients.length; i++) {
      _mint(_recipients[i], _quantity);
    }
  }

  /**
   * @notice Withdraws the contract's balance. Only callable by the contract owner.
   */
  function withdraw() external onlyOwner {
    require(payable(msg.sender).send(address(this).balance));
  }

  function _startTokenId() internal view virtual override returns (uint256) {
    return 1;
  }
}

// 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);
    }
}

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

pragma solidity ^0.8.0;

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

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

//SPDX-License-Identifier: MIT
pragma solidity ^0.8.12;

import "./Trigonometry.sol";
import "./Utilities.sol";

contract Renderer {
  uint256 constant SIZE = 500;

  struct Planet {
    uint256 planetRadius;
    uint256 ringsOffset;
    uint256 orbitRadius;
    uint256[3] color;
    uint256 initialAngleDegrees;
    uint256 duration;
  }

  function translateWithAngle(
    int256 x,
    int256 y,
    uint256 degrees
  ) internal pure returns (int256, int256) {
    int256 newX = x;
    int256 newY = y;

    newX =
      x *
      Trigonometry.cos(degrees * (Trigonometry.PI / 180)) -
      y *
      Trigonometry.sin(degrees * (Trigonometry.PI / 180));
    newY =
      x *
      Trigonometry.sin(degrees * (Trigonometry.PI / 180)) +
      y *
      Trigonometry.cos(degrees * (Trigonometry.PI / 180));

    return (newX, newY);
  }


  /**
  * @notice Gets the SVG representation of a planet's orbit.
  * @param planet The planet to generate the SVG for.
  */
  function getOrbitSVG(Planet memory planet) public pure returns (string memory) {
    uint256 halfCanvasWidth = SIZE / 2;

    // Calculate the initial position of the planet
    int256 x = int256(planet.orbitRadius);
    int256 y = 0;

    (int256 innerX, int256 innerY) = translateWithAngle(x - 1, y, planet.initialAngleDegrees);
    (int256 outerX, int256 outerY) = translateWithAngle(x, y, planet.initialAngleDegrees);

    string memory colorTuple = string.concat(
      utils.uint2str(planet.color[0]),
      ",",
      utils.uint2str(planet.color[1]),
      ",",
      utils.uint2str(planet.color[2])
    );

    // Generate the SVG string
    string memory renderedSVG = string.concat(
      '<circle cx="',
      utils.uint2str(halfCanvasWidth),
      '" cy="',
      utils.uint2str(halfCanvasWidth),
      '" r="',
       utils.uint2str(planet.orbitRadius),
      '" fill="none" stroke="rgba(',
      colorTuple,
      ',0.5)"/>',
      // Inner circle
      '<g><circle cx="',
      utils.uint2str(uint256(int256(halfCanvasWidth) + innerX / 1e18)),
      '" cy="'
      
    );

    renderedSVG = string.concat(
      renderedSVG,
      utils.uint2str(uint256(int256(halfCanvasWidth) - innerY / 1e18)),
      '" r="',
      utils.uint2str(planet.planetRadius - 2),
      '" fill="rgb(',
      colorTuple,
      ')"/>'
      // Outer circle
      '<circle cx="',
      utils.uint2str(uint256(int256(halfCanvasWidth) + outerX / 1e18)),
      '" cy="'
    );

    renderedSVG = string.concat(
      renderedSVG,
      utils.uint2str(uint256(int256(halfCanvasWidth) - outerY / 1e18)),
      '" r="',
      utils.uint2str(planet.planetRadius),
      '" fill-opacity="0.8" fill="rgb(',
      colorTuple,
      ')"/>'
    );

    if (planet.ringsOffset != 0) {
      uint256 ringsRadius = planet.planetRadius + planet.ringsOffset;
      renderedSVG = string.concat(
        renderedSVG,
        // Rings
        '<circle cx="',
        utils.uint2str(uint256(int256(halfCanvasWidth) + outerX / 1e18)),
        '" cy="',
        utils.uint2str(uint256(int256(halfCanvasWidth) - outerY / 1e18)),
        '" r="',
        utils.uint2str(ringsRadius),
        '" fill="none" stroke-width="1" stroke="rgb(',
        colorTuple,
        ')"/>'
      );
    }

    renderedSVG = string.concat(
      renderedSVG,
      '<animateTransform attributeName="transform" type="rotate" from="0 ',
      utils.uint2str(halfCanvasWidth),
      " ",
      utils.uint2str(halfCanvasWidth),
      '" to="360 ',
      utils.uint2str(halfCanvasWidth),
      " ",
      utils.uint2str(halfCanvasWidth),
      '" dur="'
    );

    renderedSVG = string.concat(
      renderedSVG,
      utils.uint2str(planet.duration),
      's" repeatCount="indefinite"></animateTransform>',
      "</g>"
    );

    return renderedSVG;
  }

  /**
  * @notice Gets the number of planets in a solar system.
  * @param _tokenId The token ID of the solar system to get the number of planets for.
  */
  function numPlanetsForTokenId(uint256 _tokenId) public pure returns (uint256) {
    return utils.randomRange(_tokenId, "numPlanets", 1, 6);
  }

  /**
  * @notice Gets the number of ringed planets in a solar system.
  * @param _tokenId The token ID of the solar system to get the number of ringed planets for.
  */
  function numRingedPlanetsForTokenId(uint256 _tokenId) public pure returns (uint256) {
    uint256 numRingedPlanets;
    for (uint256 i = 0; i < numPlanetsForTokenId(_tokenId); i++) {
      if (utils.randomRange(_tokenId, string.concat("ringsOffset", utils.uint2str(i)), 0, 10) == 5) {
        numRingedPlanets++;
      }
    }
    return numRingedPlanets;
  }

  /**
  * @notice Determines if a solar system has a rare star.
  * @param _tokenId The token ID of the solar system to check.
  */
  function hasRareStarForTokenId(uint256 _tokenId) public pure returns (bool) {
    return utils.randomRange(_tokenId, "rareStar", 0, 10) == 5;
  }

  /**
  * @notice Gets the SVG representation of a solar system.
  * @param _tokenId The token ID of the solar system to generate the SVG for.
  */
  function getSVG(uint256 _tokenId) public pure returns (string memory) {
    uint256 numPlanets = numPlanetsForTokenId(_tokenId);
    uint256 radiusInterval = SIZE / 2 / (numPlanets + 3);
    uint256 planetRadiusUpperBound = utils.min(radiusInterval / 2, SIZE / 4);
    uint256 planetRadiusLowerBound = radiusInterval / 4;

    uint256 starRadius = utils.randomRange(_tokenId, "starRadius", radiusInterval, radiusInterval * 2 - 10);
    string memory starAttributes = hasRareStarForTokenId(_tokenId) ? 'fill="#39B1FF"' : 'fill="#FFDA17"';

    string memory renderSvg = string.concat(
      '<svg width="',
      utils.uint2str(SIZE),
      '" height="',
      utils.uint2str(SIZE),
      '" viewBox="0 0 ',
      utils.uint2str(SIZE),
      " ",
      utils.uint2str(SIZE),
      '" xmlns="http://www.w3.org/2000/svg">',
      '<rect width="',
      utils.uint2str(SIZE),
      '" height="',
      utils.uint2str(SIZE),
      '" fill="#0D1F2F"></rect>',
      '<circle cx="',
      utils.uint2str(SIZE / 2),
      '" cy="',
      utils.uint2str(SIZE / 2),
      '" r="',
      utils.uint2str(starRadius),
      '" ',
      starAttributes,
      "/>"
    );

    for (uint256 i = 0; i < numPlanets; i++) {
      Planet memory planet;

      if (utils.randomRange(_tokenId, string.concat("ringsOffset", utils.uint2str(i)), 0, 10) == 5) {
        planet.ringsOffset = 4;
      }

      planet.planetRadius = utils.randomRange(
        _tokenId,
        string.concat("planetRadius", utils.uint2str(i)),
        planetRadiusLowerBound,
        planetRadiusUpperBound - planet.ringsOffset
      );

      planet.orbitRadius = radiusInterval * (i + 3);
      planet.duration = utils.randomRange(_tokenId, string.concat("duration", utils.uint2str(i)), 5, 15);

      planet.color[0] = utils.randomRange(_tokenId, string.concat("colorR", utils.uint2str(i)), 100, 255);
      planet.color[1] = utils.randomRange(_tokenId, string.concat("colorG", utils.uint2str(i)), 100, 255);
      planet.color[2] = utils.randomRange(_tokenId, string.concat("colorB", utils.uint2str(i)), 100, 255);

      planet.initialAngleDegrees = utils.randomRange(
        _tokenId,
        string.concat("initialAngle", utils.uint2str(i)),
        0,
        360
      );

      string memory planetSVG = getOrbitSVG(planet);
      renderSvg = string.concat(renderSvg, planetSVG);
    }

    renderSvg = string.concat(renderSvg, "</svg>");

    return renderSvg;
  }

  function render(uint256 _tokenId) public pure returns (string memory) {
    return getSVG(_tokenId);
  }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.12;

/**
 * @notice Solidity library offering basic trigonometry functions where inputs and outputs are
 * integers. Inputs are specified in radians scaled by 1e18, and similarly outputs are scaled by 1e18.
 *
 * This implementation is based off the Solidity trigonometry library written by Lefteris Karapetsas
 * which can be found here: https://github.com/Sikorkaio/sikorka/blob/e75c91925c914beaedf4841c0336a806f2b5f66d/contracts/trigonometry.sol
 *
 * Compared to Lefteris' implementation, this version makes the following changes:
 *   - Uses a 32 bits instead of 16 bits for improved accuracy
 *   - Updated for Solidity 0.8.x
 *   - Various gas optimizations
 *   - Change inputs/outputs to standard trig format (scaled by 1e18) instead of requiring the
 *     integer format used by the algorithm
 *
 * Lefertis' implementation is based off Dave Dribin's trigint C library
 *     http://www.dribin.org/dave/trigint/
 *
 * Which in turn is based from a now deleted article which can be found in the Wayback Machine:
 *     http://web.archive.org/web/20120301144605/http://www.dattalo.com/technical/software/pic/picsine.html
 */
library Trigonometry {
  // Table index into the trigonometric table
  uint256 constant INDEX_WIDTH = 8;
  // Interpolation between successive entries in the table
  uint256 constant INTERP_WIDTH = 16;
  uint256 constant INDEX_OFFSET = 28 - INDEX_WIDTH;
  uint256 constant INTERP_OFFSET = INDEX_OFFSET - INTERP_WIDTH;
  uint32 constant ANGLES_IN_CYCLE = 1073741824;
  uint32 constant QUADRANT_HIGH_MASK = 536870912;
  uint32 constant QUADRANT_LOW_MASK = 268435456;
  uint256 constant SINE_TABLE_SIZE = 256;

  // Pi as an 18 decimal value, which is plenty of accuracy: "For JPL's highest accuracy calculations, which are for
  // interplanetary navigation, we use 3.141592653589793: https://www.jpl.nasa.gov/edu/news/2016/3/16/how-many-decimals-of-pi-do-we-really-need/
  uint256 constant PI = 3141592653589793238;
  uint256 constant TWO_PI = 2 * PI;
  uint256 constant PI_OVER_TWO = PI / 2;

  // The constant sine lookup table was generated by generate_trigonometry.py. We must use a constant
  // bytes array because constant arrays are not supported in Solidity. Each entry in the lookup
  // table is 4 bytes. Since we're using 32-bit parameters for the lookup table, we get a table size
  // of 2^(32/4) + 1 = 257, where the first and last entries are equivalent (hence the table size of
  // 256 defined above)
  uint8 constant entry_bytes = 4; // each entry in the lookup table is 4 bytes
  uint256 constant entry_mask = ((1 << (8 * entry_bytes)) - 1); // mask used to cast bytes32 -> lookup table entry
  bytes constant sin_table =
    hex"00_00_00_00_00_c9_0f_88_01_92_1d_20_02_5b_26_d7_03_24_2a_bf_03_ed_26_e6_04_b6_19_5d_05_7f_00_35_06_47_d9_7c_07_10_a3_45_07_d9_5b_9e_08_a2_00_9a_09_6a_90_49_0a_33_08_bc_0a_fb_68_05_0b_c3_ac_35_0c_8b_d3_5e_0d_53_db_92_0e_1b_c2_e4_0e_e3_87_66_0f_ab_27_2b_10_72_a0_48_11_39_f0_cf_12_01_16_d5_12_c8_10_6e_13_8e_db_b1_14_55_76_b1_15_1b_df_85_15_e2_14_44_16_a8_13_05_17_6d_d9_de_18_33_66_e8_18_f8_b8_3c_19_bd_cb_f3_1a_82_a0_25_1b_47_32_ef_1c_0b_82_6a_1c_cf_8c_b3_1d_93_4f_e5_1e_56_ca_1e_1f_19_f9_7b_1f_dc_dc_1b_20_9f_70_1c_21_61_b3_9f_22_23_a4_c5_22_e5_41_af_23_a6_88_7e_24_67_77_57_25_28_0c_5d_25_e8_45_b6_26_a8_21_85_27_67_9d_f4_28_26_b9_28_28_e5_71_4a_29_a3_c4_85_2a_61_b1_01_2b_1f_34_eb_2b_dc_4e_6f_2c_98_fb_ba_2d_55_3a_fb_2e_11_0a_62_2e_cc_68_1e_2f_87_52_62_30_41_c7_60_30_fb_c5_4d_31_b5_4a_5d_32_6e_54_c7_33_26_e2_c2_33_de_f2_87_34_96_82_4f_35_4d_90_56_36_04_1a_d9_36_ba_20_13_37_6f_9e_46_38_24_93_b0_38_d8_fe_93_39_8c_dd_32_3a_40_2d_d1_3a_f2_ee_b7_3b_a5_1e_29_3c_56_ba_70_3d_07_c1_d5_3d_b8_32_a5_3e_68_0b_2c_3f_17_49_b7_3f_c5_ec_97_40_73_f2_1d_41_21_58_9a_41_ce_1e_64_42_7a_41_d0_43_25_c1_35_43_d0_9a_ec_44_7a_cd_50_45_24_56_bc_45_cd_35_8f_46_75_68_27_47_1c_ec_e6_47_c3_c2_2e_48_69_e6_64_49_0f_57_ee_49_b4_15_33_4a_58_1c_9d_4a_fb_6c_97_4b_9e_03_8f_4c_3f_df_f3_4c_e1_00_34_4d_81_62_c3_4e_21_06_17_4e_bf_e8_a4_4f_5e_08_e2_4f_fb_65_4c_50_97_fc_5e_51_33_cc_94_51_ce_d4_6e_52_69_12_6e_53_02_85_17_53_9b_2a_ef_54_33_02_7d_54_ca_0a_4a_55_60_40_e2_55_f5_a4_d2_56_8a_34_a9_57_1d_ee_f9_57_b0_d2_55_58_42_dd_54_58_d4_0e_8c_59_64_64_97_59_f3_de_12_5a_82_79_99_5b_10_35_ce_5b_9d_11_53_5c_29_0a_cc_5c_b4_20_df_5d_3e_52_36_5d_c7_9d_7b_5e_50_01_5d_5e_d7_7c_89_5f_5e_0d_b2_5f_e3_b3_8d_60_68_6c_ce_60_ec_38_2f_61_6f_14_6b_61_f1_00_3e_62_71_fa_68_62_f2_01_ac_63_71_14_cc_63_ef_32_8f_64_6c_59_bf_64_e8_89_25_65_63_bf_91_65_dd_fb_d2_66_57_3c_bb_66_cf_81_1f_67_46_c7_d7_67_bd_0f_bc_68_32_57_aa_68_a6_9e_80_69_19_e3_1f_69_8c_24_6b_69_fd_61_4a_6a_6d_98_a3_6a_dc_c9_64_6b_4a_f2_78_6b_b8_12_d0_6c_24_29_5f_6c_8f_35_1b_6c_f9_34_fb_6d_62_27_f9_6d_ca_0d_14_6e_30_e3_49_6e_96_a9_9c_6e_fb_5f_11_6f_5f_02_b1_6f_c1_93_84_70_23_10_99_70_83_78_fe_70_e2_cb_c5_71_41_08_04_71_9e_2c_d1_71_fa_39_48_72_55_2c_84_72_af_05_a6_73_07_c3_cf_73_5f_66_25_73_b5_eb_d0_74_0b_53_fa_74_5f_9d_d0_74_b2_c8_83_75_04_d3_44_75_55_bd_4b_75_a5_85_ce_75_f4_2c_0a_76_41_af_3c_76_8e_0e_a5_76_d9_49_88_77_23_5f_2c_77_6c_4e_da_77_b4_17_df_77_fa_b9_88_78_40_33_28_78_84_84_13_78_c7_ab_a1_79_09_a9_2c_79_4a_7c_11_79_8a_23_b0_79_c8_9f_6d_7a_05_ee_ac_7a_42_10_d8_7a_7d_05_5a_7a_b6_cb_a3_7a_ef_63_23_7b_26_cb_4e_7b_5d_03_9d_7b_92_0b_88_7b_c5_e2_8f_7b_f8_88_2f_7c_29_fb_ed_7c_5a_3d_4f_7c_89_4b_dd_7c_b7_27_23_7c_e3_ce_b1_7d_0f_42_17_7d_39_80_eb_7d_62_8a_c5_7d_8a_5f_3f_7d_b0_fd_f7_7d_d6_66_8e_7d_fa_98_a7_7e_1d_93_e9_7e_3f_57_fe_7e_5f_e4_92_7e_7f_39_56_7e_9d_55_fb_7e_ba_3a_38_7e_d5_e5_c5_7e_f0_58_5f_7f_09_91_c3_7f_21_91_b3_7f_38_57_f5_7f_4d_e4_50_7f_62_36_8e_7f_75_4e_7f_7f_87_2b_f2_7f_97_ce_bc_7f_a7_36_b3_7f_b5_63_b2_7f_c2_55_95_7f_ce_0c_3d_7f_d8_87_8d_7f_e1_c7_6a_7f_e9_cb_bf_7f_f0_94_77_7f_f6_21_81_7f_fa_72_d0_7f_fd_88_59_7f_ff_62_15_7f_ff_ff_ff";

  /**
   * @notice Return the sine of a value, specified in radians scaled by 1e18
   * @dev This algorithm for converting sine only uses integer values, and it works by dividing the
   * circle into 30 bit angles, i.e. there are 1,073,741,824 (2^30) angle units, instead of the
   * standard 360 degrees (2pi radians). From there, we get an output in range -2,147,483,647 to
   * 2,147,483,647, (which is the max value of an int32) which is then converted back to the standard
   * range of -1 to 1, again scaled by 1e18
   * @param _angle Angle to convert
   * @return Result scaled by 1e18
   */
  function sin(uint256 _angle) internal pure returns (int256) {
    unchecked {
      // Convert angle from from arbitrary radian value (range of 0 to 2pi) to the algorithm's range
      // of 0 to 1,073,741,824
      _angle = (ANGLES_IN_CYCLE * (_angle % TWO_PI)) / TWO_PI;

      // Apply a mask on an integer to extract a certain number of bits, where angle is the integer
      // whose bits we want to get, the width is the width of the bits (in bits) we want to extract,
      // and the offset is the offset of the bits (in bits) we want to extract. The result is an
      // integer containing _width bits of _value starting at the offset bit
      uint256 interp = (_angle >> INTERP_OFFSET) & ((1 << INTERP_WIDTH) - 1);
      uint256 index = (_angle >> INDEX_OFFSET) & ((1 << INDEX_WIDTH) - 1);

      // The lookup table only contains data for one quadrant (since sin is symmetric around both
      // axes), so here we figure out which quadrant we're in, then we lookup the values in the
      // table then modify values accordingly
      bool is_odd_quadrant = (_angle & QUADRANT_LOW_MASK) == 0;
      bool is_negative_quadrant = (_angle & QUADRANT_HIGH_MASK) != 0;

      if (!is_odd_quadrant) {
        index = SINE_TABLE_SIZE - 1 - index;
      }

      bytes memory table = sin_table;
      // We are looking for two consecutive indices in our lookup table
      // Since EVM is left aligned, to read n bytes of data from idx i, we must read from `i * data_len` + `n`
      // therefore, to read two entries of size entry_bytes `index * entry_bytes` + `entry_bytes * 2`
      uint256 offset1_2 = (index + 2) * entry_bytes;

      // This following snippet will function for any entry_bytes <= 15
      uint256 x1_2;
      assembly {
        // mload will grab one word worth of bytes (32), as that is the minimum size in EVM
        x1_2 := mload(add(table, offset1_2))
      }

      // We now read the last two numbers of size entry_bytes from x1_2
      // in example: entry_bytes = 4; x1_2 = 0x00...12345678abcdefgh
      // therefore: entry_mask = 0xFFFFFFFF

      // 0x00...12345678abcdefgh >> 8*4 = 0x00...12345678
      // 0x00...12345678 & 0xFFFFFFFF = 0x12345678
      uint256 x1 = (x1_2 >> (8 * entry_bytes)) & entry_mask;
      // 0x00...12345678abcdefgh & 0xFFFFFFFF = 0xabcdefgh
      uint256 x2 = x1_2 & entry_mask;

      // Approximate angle by interpolating in the table, accounting for the quadrant
      uint256 approximation = ((x2 - x1) * interp) >> INTERP_WIDTH;
      int256 sine = is_odd_quadrant ? int256(x1) + int256(approximation) : int256(x2) - int256(approximation);
      if (is_negative_quadrant) {
        sine *= -1;
      }

      // Bring result from the range of -2,147,483,647 through 2,147,483,647 to -1e18 through 1e18.
      // This can never overflow because sine is bounded by the above values
      return (sine * 1e18) / 2_147_483_647;
    }
  }

  /**
   * @notice Return the cosine of a value, specified in radians scaled by 1e18
   * @dev This is identical to the sin() method, and just computes the value by delegating to the
   * sin() method using the identity cos(x) = sin(x + pi/2)
   * @dev Overflow when `angle + PI_OVER_TWO > type(uint256).max` is ok, results are still accurate
   * @param _angle Angle to convert
   * @return Result scaled by 1e18
   */
  function cos(uint256 _angle) internal pure returns (int256) {
    unchecked {
      return sin(_angle + PI_OVER_TWO);
    }
  }
}

//SPDX-License-Identifier: MIT
pragma solidity ^0.8.12;

// Core utils used extensively to format CSS and numbers.
library utils {
  function random(string memory input) internal pure returns (uint256) {
    return uint256(keccak256(abi.encodePacked(input)));
  }

  function randomRange(
    uint256 tokenId,
    string memory keyPrefix,
    uint256 lower,
    uint256 upper
  ) internal pure returns (uint256) {
    uint256 rand = random(string(abi.encodePacked(keyPrefix, uint2str(tokenId))));
    return (rand % (upper - lower)) + lower;
  }

  function min(uint256 a, uint256 b) internal pure returns (uint256) {
    return a < b ? a : b;
  }

  // converts an unsigned integer to a string
  function uint2str(uint256 _i) internal pure returns (string memory _uintAsString) {
    if (_i == 0) {
      return "0";
    }
    uint256 j = _i;
    uint256 len;
    while (j != 0) {
      len++;
      j /= 10;
    }
    bytes memory bstr = new bytes(len);
    uint256 k = len;
    while (_i != 0) {
      k = k - 1;
      uint8 temp = (48 + uint8(_i - (_i / 10) * 10));
      bytes1 b1 = bytes1(temp);
      bstr[k] = b1;
      _i /= 10;
    }
    return string(bstr);
  }
}

// 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)
        }
    }
}

// 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);
}

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

/// [MIT License]
/// @title Base64
/// @notice Provides a function for encoding some bytes in base64
/// @author Brecht Devos <[email protected]>
library Base64 {
  bytes internal constant TABLE = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";

  /// @notice Encodes some bytes to the base64 representation
  function encode(bytes memory data) internal pure returns (string memory) {
    uint256 len = data.length;
    if (len == 0) return "";

    // multiply by 4/3 rounded up
    uint256 encodedLen = 4 * ((len + 2) / 3);

    // Add some extra buffer at the end
    bytes memory result = new bytes(encodedLen + 32);

    bytes memory table = TABLE;

    assembly {
      let tablePtr := add(table, 1)
      let resultPtr := add(result, 32)

      for {
        let i := 0
      } lt(i, len) {

      } {
        i := add(i, 3)
        let input := and(mload(add(data, i)), 0xffffff)

        let out := mload(add(tablePtr, and(shr(18, input), 0x3F)))
        out := shl(8, out)
        out := add(out, and(mload(add(tablePtr, and(shr(12, input), 0x3F))), 0xFF))
        out := shl(8, out)
        out := add(out, and(mload(add(tablePtr, and(shr(6, input), 0x3F))), 0xFF))
        out := shl(8, out)
        out := add(out, and(mload(add(tablePtr, and(input, 0x3F))), 0xFF))
        out := shl(224, out)

        mstore(resultPtr, out)

        resultPtr := add(resultPtr, 4)
      }

      switch mod(len, 3)
      case 1 {
        mstore(sub(resultPtr, 2), shl(240, 0x3d3d))
      }
      case 2 {
        mstore(sub(resultPtr, 1), shl(248, 0x3d))
      }

      mstore(result, encodedLen)
    }

    return string(result);
  }
}

{
  "evmVersion": "london",
  "libraries": {
    "contracts/SolarSystem.sol:SolarSystems": {
      "Utilities": "0x78b005A56b91bE61c7d988b346F69233e81E4e4F",
      "Trigonometry": "0x3c0d3c2a9A73fbDF4C4F12597AF8Ba0927A4C810"
    }
  },
  "metadata": {
    "bytecodeHash": "ipfs",
    "useLiteralContent": true
  },
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "remappings": [],
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

• No Contract Security Audit Submitted- Submit Audit Here

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-----Decoded View---------------
Arg [0] : _name (string): SolarSystems
Arg [1] : _symbol (string): SOLSYS
Arg [2] : _price (uint256): 10000000000000000
Arg [3] : _maxSupply (uint256): 1000
Arg [4] : _renderer (address): 0xb3AFac116F43B90EC03dB56844c16Ec777c2f197

-----Encoded View---------------
9 Constructor Arguments found :
Arg [0] : 00000000000000000000000000000000000000000000000000000000000000a0
Arg [1] : 00000000000000000000000000000000000000000000000000000000000000e0
Arg [2] : 000000000000000000000000000000000000000000000000002386f26fc10000
Arg [3] : 00000000000000000000000000000000000000000000000000000000000003e8
Arg [4] : 000000000000000000000000b3afac116f43b90ec03db56844c16ec777c2f197
Arg [5] : 000000000000000000000000000000000000000000000000000000000000000c
Arg [6] : 536f6c617253797374656d730000000000000000000000000000000000000000
Arg [7] : 0000000000000000000000000000000000000000000000000000000000000006
Arg [8] : 534f4c5359530000000000000000000000000000000000000000000000000000