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Contract Source Code Verified (Exact Match)

Contract Name:
OnchainMetadataUtils

Compiler Version
v0.8.21+commit.d9974bed

Optimization Enabled:
No with 200 runs

Other Settings:
paris EvmVersion
File 1 of 6 : OnchainMetadataUtils.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.4;
import '@openzeppelin/contracts/utils/Strings.sol';
import '@openzeppelin/contracts/utils/Base64.sol';
import '../interfaces/IScriptyBuilder.sol';

library OnchainMetadataUtils {
  // commonly used eth fs assets
  string public constant POB_STUDIO_SIGNATURE = 'POB_signature_white-min.png';

  string public constant PREVIEW_SERVICE_URL =
    'https://nft-preview.pob.studio/api?';

  bytes public constant URL_SAFE_SCRIPT_TAG = '%253Cscript%253E'; // <script>
  bytes public constant URL_SAFE_SCRIPT_END_TAG = '%253C%252Fscript%253E'; // </script>

  uint public constant URL_SAFE_BUFFER_SIZE = 96;

  uint public constant URL_SAFE_INLINE_SCRIPT_WRAP_BUFFER_SIZE = 16 + 21;

  uint public constant URL_SAFE_BASE64_SCRIPT_WRAP_BUFFER_SIZE = 73 + 31;

  uint public constant URL_SAFE_POB_SIGNATURE_BUFFER_SIZE = 5436;

  function toHexString(
    bytes memory buffer
  ) public pure returns (string memory) {
    // Fixed buffer size for hexadecimal convertion
    bytes memory converted = new bytes(buffer.length * 2);

    bytes memory _base = '0123456789abcdef';

    for (uint256 i = 0; i < buffer.length; i++) {
      converted[i * 2] = _base[uint8(buffer[i]) / _base.length];
      converted[i * 2 + 1] = _base[uint8(buffer[i]) % _base.length];
    }

    return string(abi.encodePacked('0x', converted));
  }

  function getPreviewImageUrl(
    address component,
    uint chainId,
    bytes memory props,
    uint width,
    uint height
  ) public view returns (string memory url) {
    return
      string(
        abi.encodePacked(
          PREVIEW_SERVICE_URL,
          'component=',
          Strings.toHexString(component),
          '&chainId=',
          Strings.toString(chainId),
          '&props=',
          toHexString(props),
          '&width=',
          Strings.toString(width),
          '&height=',
          Strings.toString(height),
          '&blockNumber=',
          Strings.toString(block.number)
        )
      );
  }

  function getPobStudioSignatureRequest(
    address ethfsStorage
  ) public pure returns (WrappedScriptRequest memory request) {
    request.name = POB_STUDIO_SIGNATURE;
    request.contractAddress = ethfsStorage;
    request
      .wrapPrefix = '%253Cscript%253Evar%2520signature%253D%2522data%253Aimage%252Fpng%253Bbase64%252C';
    request.wrapSuffix = '%2522%253B%253C%252Fscript%253E';
    request.wrapType = 4;
  }

  function sizeForBase64Encoding(uint256 value) public pure returns (uint256) {
    unchecked {
      return 4 * ((value + 2) / 3);
    }
  }

  enum NftAttributeDisplayType {
    NONE,
    NUMBER,
    BOOST_NUMBER,
    DATE,
    BOOST_PERCENTAGE
  }

  struct NftAttribute {
    NftAttributeDisplayType displayType;
    bytes traitType;
    bytes value;
    bool isValueStringWrapped;
  }

  function getUrlSafeNftAttributes(
    NftAttribute[] memory attributes
  ) public pure returns (bytes memory encodedAttributes) {
    for (uint i = 0; i < attributes.length; ++i) {
      NftAttribute memory attr = attributes[i];
      bytes memory prefix = '%7B%22trait_type%22%3A%22';
      if (attr.displayType == NftAttributeDisplayType.NUMBER) {
        prefix = '%7B%22display_type%22%3A%20%22number%22%2C%22trait_type%22%3A%22';
      } else if (attr.displayType == NftAttributeDisplayType.BOOST_NUMBER) {
        prefix = '%7B%22display_type%22%3A%20%22boost_number%22%2C%22trait_type%22%3A%22';
      } else if (attr.displayType == NftAttributeDisplayType.DATE) {
        prefix = '%7B%22display_type%22%3A%20%22date%22%2C%22trait_type%22%3A%22';
      } else if (attr.displayType == NftAttributeDisplayType.BOOST_PERCENTAGE) {
        prefix = '%7B%22display_type%22%3A%20%22boost_percentage%22%2C%22trait_type%22%3A%22';
      }
      encodedAttributes = abi.encodePacked(
        encodedAttributes,
        prefix,
        attr.traitType,
        '%22%2C%22value%22%3A',
        attr.isValueStringWrapped ? '%22' : '',
        attr.value,
        attr.isValueStringWrapped ? '%22' : '',
        '%7D',
        i != attributes.length - 1 ? '%2C' : ''
      );
    }
  }
}

File 2 of 6 : Base64.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.2) (utils/Base64.sol)

pragma solidity ^0.8.20;

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

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

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

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

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

            // Prepare result pointer, jump over length
            let resultPtr := add(result, 0x20)
            let dataPtr := data
            let endPtr := add(data, mload(data))

            // In some cases, the last iteration will read bytes after the end of the data. We cache the value, and
            // set it to zero to make sure no dirty bytes are read in that section.
            let afterPtr := add(endPtr, 0x20)
            let afterCache := mload(afterPtr)
            mstore(afterPtr, 0x00)

            // Run over the input, 3 bytes at a time
            for {

            } lt(dataPtr, endPtr) {

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

                // To write each character, shift the 3 byte (24 bits) chunk
                // 4 times in blocks of 6 bits for each character (18, 12, 6, 0)
                // and apply logical AND with 0x3F to bitmask the least significant 6 bits.
                // Use this as an index into the lookup table, mload an entire word
                // so the desired character is in the least significant byte, and
                // mstore8 this least significant byte into the result and continue.

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

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

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

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

            // Reset the value that was cached
            mstore(afterPtr, afterCache)

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

        return result;
    }
}

File 3 of 6 : Math.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/math/Math.sol)

pragma solidity ^0.8.20;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    /**
     * @dev Muldiv operation overflow.
     */
    error MathOverflowedMulDiv();

    enum Rounding {
        Floor, // Toward negative infinity
        Ceil, // Toward positive infinity
        Trunc, // Toward zero
        Expand // Away from zero
    }

    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

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

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

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

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

    /**
     * @dev Returns the 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 towards infinity instead
     * of rounding towards zero.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        if (b == 0) {
            // Guarantee the same behavior as in a regular Solidity division.
            return a / b;
        }

        // (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 = x * y; // Least significant 256 bits of the product
            uint256 prod1; // Most significant 256 bits of the product
            assembly {
                let mm := mulmod(x, y, not(0))
                prod1 := sub(sub(mm, prod0), lt(mm, prod0))
            }

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

            // Make sure the result is less than 2^256. Also prevents denominator == 0.
            if (denominator <= prod1) {
                revert MathOverflowedMulDiv();
            }

            ///////////////////////////////////////////////
            // 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.

            uint256 twos = denominator & (0 - denominator);
            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 (unsignedRoundsUp(rounding) && 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
     * towards zero.
     *
     * 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 + (unsignedRoundsUp(rounding) && result * result < a ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 2 of a positive value rounded towards zero.
     * 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 + (unsignedRoundsUp(rounding) && 1 << result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 10 of a positive value rounded towards zero.
     * 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 + (unsignedRoundsUp(rounding) && 10 ** result < value ? 1 : 0);
        }
    }

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

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

    /**
     * @dev Returns whether a provided rounding mode is considered rounding up for unsigned integers.
     */
    function unsignedRoundsUp(Rounding rounding) internal pure returns (bool) {
        return uint8(rounding) % 2 == 1;
    }
}

File 4 of 6 : SignedMath.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/math/SignedMath.sol)

pragma solidity ^0.8.20;

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

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

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

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

File 5 of 6 : Strings.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/Strings.sol)

pragma solidity ^0.8.20;

import {Math} from "./math/Math.sol";
import {SignedMath} from "./math/SignedMath.sol";

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

    /**
     * @dev The `value` string doesn't fit in the specified `length`.
     */
    error StringsInsufficientHexLength(uint256 value, uint256 length);

    /**
     * @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), HEX_DIGITS))
                }
                value /= 10;
                if (value == 0) break;
            }
            return buffer;
        }
    }

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

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

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

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

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

File 6 of 6 : IScriptyBuilder.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

///////////////////////////////////////////////////////////
// ░██████╗░█████╗░██████╗░██╗██████╗░████████╗██╗░░░██╗ //
// ██╔════╝██╔══██╗██╔══██╗██║██╔══██╗╚══██╔══╝╚██╗░██╔╝ //
// ╚█████╗░██║░░╚═╝██████╔╝██║██████╔╝░░░██║░░░░╚████╔╝░ //
// ░╚═══██╗██║░░██╗██╔══██╗██║██╔═══╝░░░░██║░░░░░╚██╔╝░░ //
// ██████╔╝╚█████╔╝██║░░██║██║██║░░░░░░░░██║░░░░░░██║░░░ //
// ╚═════╝░░╚════╝░╚═╝░░╚═╝╚═╝╚═╝░░░░░░░░╚═╝░░░░░░╚═╝░░░ //
///////////////////////////////////////////////////////////

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

struct WrappedScriptRequest {
  string name;
  address contractAddress;
  bytes contractData;
  uint8 wrapType;
  bytes wrapPrefix;
  bytes wrapSuffix;
  bytes scriptContent;
}

struct InlineScriptRequest {
  string name;
  address contractAddress;
  bytes contractData;
  bytes scriptContent;
}

interface IScriptyBuilder {
  // =============================================================
  //                            ERRORS
  // =============================================================

  /**
   * @notice Error for, Invalid length of requests
   */
  error InvalidRequestsLength();

  // =============================================================
  //                      RAW HTML GETTERS
  // =============================================================

  /**
   * @notice Get requested scripts housed in <body> with custom wrappers
   * @dev Your requested scripts are returned in the following format:
   *      <html>
   *          <head></head>
   *          <body style='margin:0;'>
   *              [wrapPrefix[0]]{request[0]}[wrapSuffix[0]]
   *              [wrapPrefix[1]]{request[1]}[wrapSuffix[1]]
   *              ...
   *              [wrapPrefix[n]]{request[n]}[wrapSuffix[n]]
   *          </body>
   *      </html>
   * @param requests - Array of WrappedScriptRequests
   * @param bufferSize - Total buffer size of all requested scripts
   * @return Full html wrapped scripts
   */
  function getHTMLWrapped(
    WrappedScriptRequest[] calldata requests,
    uint256 bufferSize
  ) external view returns (bytes memory);

  /**
   * @notice Get requested scripts housed in URL Safe wrappers
   * @dev Any wrapper type 0 scripts are converted to base64 and wrapped
   *      with <script src="data:text/javascript;base64,[SCRIPT]"></script>
   *
   *      [WARNING]: Large non-base64 libraries that need base64 encoding
   *      carry a high risk of causing a gas out. Highly advised to use
   *      base64 encoded scripts where possible
   *
   *      Your requested scripts are returned in the following format:
   *      <html>
   *          <head></head>
   *          <body style='margin:0;'>
   *              [wrapPrefix[0]]{request[0]}[wrapSuffix[0]]
   *              [wrapPrefix[1]]{request[1]}[wrapSuffix[1]]
   *              ...
   *              [wrapPrefix[n]]{request[n]}[wrapSuffix[n]]
   *          </body>
   *      </html>
   * @param requests - Array of WrappedScriptRequests
   * @param bufferSize - Total buffer size of all requested scripts
   * @return Full URL Safe wrapped scripts
   */
  function getHTMLWrappedURLSafe(
    WrappedScriptRequest[] calldata requests,
    uint256 bufferSize
  ) external view returns (bytes memory);

  /**
   * @notice Get requested scripts housed in <body> all wrapped in <script></script>
   * @dev Your requested scripts are returned in the following format:
   *      <html>
   *          <head></head>
   *          <body style='margin:0;'>
   *              <script>
   *                  {request[0]}
   *                  {request[1]}
   *                  ...
   *                  {request[n]}
   *              </script>
   *          </body>
   *      </html>
   * @param requests - Array of InlineScriptRequest
   * @param bufferSize - Total buffer size of all requested scripts
   * @return Full html wrapped scripts
   */
  function getHTMLInline(
    InlineScriptRequest[] calldata requests,
    uint256 bufferSize
  ) external view returns (bytes memory);

  // =============================================================
  //                      ENCODED HTML GETTERS
  // =============================================================

  /**
   * @notice Get {getHTMLWrapped} and base64 encode it
   * @param requests - Array of WrappedScriptRequests
   * @param bufferSize - Total buffer size of all requested scripts
   * @return Full html wrapped scripts, base64 encoded
   */
  function getEncodedHTMLWrapped(
    WrappedScriptRequest[] calldata requests,
    uint256 bufferSize
  ) external view returns (bytes memory);

  /**
   * @notice Get {getHTMLInline} and base64 encode it
   * @param requests - Array of InlineScriptRequests
   * @param bufferSize - Total buffer size of all requested scripts
   * @return Full html wrapped scripts, base64 encoded
   */
  function getEncodedHTMLInline(
    InlineScriptRequest[] calldata requests,
    uint256 bufferSize
  ) external view returns (bytes memory);

  // =============================================================
  //                      STRING UTILITIES
  // =============================================================

  /**
   * @notice Convert {getHTMLWrapped} output to a string
   * @param requests - Array of WrappedScriptRequests
   * @param bufferSize - Total buffer size of all requested scripts
   * @return {getHTMLWrapped} as a string
   */
  function getHTMLWrappedString(
    WrappedScriptRequest[] calldata requests,
    uint256 bufferSize
  ) external view returns (string memory);

  /**
   * @notice Convert {getHTMLInline} output to a string
   * @param requests - Array of InlineScriptRequests
   * @param bufferSize - Total buffer size of all requested scripts
   * @return {getHTMLInline} as a string
   */
  function getHTMLInlineString(
    InlineScriptRequest[] calldata requests,
    uint256 bufferSize
  ) external view returns (string memory);

  /**
   * @notice Convert {getEncodedHTMLWrapped} output to a string
   * @param requests - Array of WrappedScriptRequests
   * @param bufferSize - Total buffer size of all requested scripts
   *                     before encoding.
   * @return {getEncodedHTMLWrapped} as a string
   */
  function getEncodedHTMLWrappedString(
    WrappedScriptRequest[] calldata requests,
    uint256 bufferSize
  ) external view returns (string memory);

  /**
   * @notice Convert {getEncodedHTMLInline} output to a string
   * @param requests - Array of InlineScriptRequests
   * @param bufferSize - Total buffer size of all requested scripts
   *                     before encoding.
   * @return {getEncodedHTMLInline} as a string
   */
  function getEncodedHTMLInlineString(
    InlineScriptRequest[] calldata requests,
    uint256 bufferSize
  ) external view returns (string memory);

  // =============================================================
  //                      OFF-CHAIN UTILITIES
  // =============================================================

  /**
   * @notice Get the buffer size of a single inline requested code
   * @param request - InlineScriptRequest data for code
   * @return Buffer size as an unit256
   */
  function getInlineScriptSize(
    InlineScriptRequest memory request
  ) external view returns (uint256);

  /**
   * @notice Get the buffer size of a single wrapped requested code
   * @param request - WrappedScriptRequest data for code
   * @return Buffer size as an unit256
   */
  function getWrappedScriptSize(
    WrappedScriptRequest memory request
  ) external view returns (uint256);

  /**
   * @notice Get the buffer size of a single wrapped requested code
   * @dev If the script is of wrapper type 0, we get buffer size for
   *      base64 encoded version.
   * @param request - WrappedScriptRequest data for code
   * @return Buffer size as an unit256
   */
  function getURLSafeWrappedScriptSize(
    WrappedScriptRequest memory request
  ) external view returns (uint256);

  /**
   * @notice Get the buffer size of an array of html wrapped inline scripts
   * @param requests - InlineScriptRequests data for code
   * @return Buffer size as an unit256
   */
  function getBufferSizeForHTMLInline(
    InlineScriptRequest[] calldata requests
  ) external view returns (uint256);

  /**
   * @notice Get the buffer size of an array of html wrapped, wrapped scripts
   * @param requests - WrappedScriptRequests data for code
   * @return Buffer size as an unit256
   */
  function getBufferSizeForHTMLWrapped(
    WrappedScriptRequest[] calldata requests
  ) external view returns (uint256);

  /**
   * @notice Get the buffer size of an array of URL safe html wrapped scripts
   * @param requests - WrappedScriptRequests data for code
   * @return Buffer size as an unit256
   */
  function getBufferSizeForURLSafeHTMLWrapped(
    WrappedScriptRequest[] calldata requests
  ) external view returns (uint256);

  /**
   * @notice Get the buffer size for encoded HTML inline scripts
   * @param requests - InlineScriptRequests data for code
   * @return Buffer size as an unit256
   */
  function getBufferSizeForEncodedHTMLInline(
    InlineScriptRequest[] calldata requests
  ) external view returns (uint256);

  /**
   * @notice Get the buffer size for encoded HTML inline scripts
   * @param requests - InlineScriptRequests data for code
   * @return Buffer size as an unit256
   */
  function getBufferSizeForEncodedHTMLWrapped(
    WrappedScriptRequest[] calldata requests
  ) external view returns (uint256);
}

Settings
{
  "evmVersion": "paris",
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

Contract Security Audit

Contract ABI

[{"inputs":[{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"uint256","name":"length","type":"uint256"}],"name":"StringsInsufficientHexLength","type":"error"},{"inputs":[],"name":"POB_STUDIO_SIGNATURE","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"PREVIEW_SERVICE_URL","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"URL_SAFE_BASE64_SCRIPT_WRAP_BUFFER_SIZE","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"URL_SAFE_BUFFER_SIZE","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"URL_SAFE_INLINE_SCRIPT_WRAP_BUFFER_SIZE","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"URL_SAFE_POB_SIGNATURE_BUFFER_SIZE","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"URL_SAFE_SCRIPT_END_TAG","outputs":[{"internalType":"bytes","name":"","type":"bytes"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"URL_SAFE_SCRIPT_TAG","outputs":[{"internalType":"bytes","name":"","type":"bytes"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"ethfsStorage","type":"address"}],"name":"getPobStudioSignatureRequest","outputs":[{"components":[{"internalType":"string","name":"name","type":"string"},{"internalType":"address","name":"contractAddress","type":"address"},{"internalType":"bytes","name":"contractData","type":"bytes"},{"internalType":"uint8","name":"wrapType","type":"uint8"},{"internalType":"bytes","name":"wrapPrefix","type":"bytes"},{"internalType":"bytes","name":"wrapSuffix","type":"bytes"},{"internalType":"bytes","name":"scriptContent","type":"bytes"}],"internalType":"struct WrappedScriptRequest","name":"request","type":"tuple"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"address","name":"component","type":"address"},{"internalType":"uint256","name":"chainId","type":"uint256"},{"internalType":"bytes","name":"props","type":"bytes"},{"internalType":"uint256","name":"width","type":"uint256"},{"internalType":"uint256","name":"height","type":"uint256"}],"name":"getPreviewImageUrl","outputs":[{"internalType":"string","name":"url","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"enum OnchainMetadataUtils.NftAttributeDisplayType","name":"displayType","type":"OnchainMetadataUtils.NftAttributeDisplayType"},{"internalType":"bytes","name":"traitType","type":"bytes"},{"internalType":"bytes","name":"value","type":"bytes"},{"internalType":"bool","name":"isValueStringWrapped","type":"bool"}],"internalType":"struct OnchainMetadataUtils.NftAttribute[]","name":"attributes","type":"tuple[]"}],"name":"getUrlSafeNftAttributes","outputs":[{"internalType":"bytes","name":"encodedAttributes","type":"bytes"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"uint256","name":"value","type":"uint256"}],"name":"sizeForBase64Encoding","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"bytes","name":"buffer","type":"bytes"}],"name":"toHexString","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"pure","type":"function"}]

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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.