some changes

src/libraries/AddressStringUtil.sol

@@ -1,16 +1,20 @@
 // SPDX-License-Identifier: UNLICENSED
-pragma solidity ^0.8.20;
+pragma solidity ^0.8.0;
 
 /// @title AddressStringUtil
 /// @notice provides utility functions for converting addresses to strings
 /// @dev Reference: https://github.com/Uniswap/solidity-lib/blob/master/contracts/libraries/AddressStringUtil.sol
 library AddressStringUtil {
+    error InvalidAddressLength(uint256 len);
+
     /// @notice Converts an address to the uppercase hex string, extracting only len bytes (up to 20, multiple of 2)
     /// @param addr the address to convert
     /// @param len the number of bytes to extract
     /// @return the hex string
     function toAsciiString(address addr, uint256 len) internal pure returns (string memory) {
-        require(len % 2 == 0 && len > 0 && len <= 40, "AddressStringUtil: INVALID_LEN");
+        if (!(len % 2 == 0 && len > 0 && len <= 40)) {
+            revert InvalidAddressLength(len);
+        }
 
         bytes memory s = new bytes(len);
         uint256 addrNum = uint256(uint160(addr));

src/libraries/CurrencyRatioSortOrder.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: UNLICENSED
-pragma solidity ^0.8.20;
+pragma solidity ^0.8.0;
 
 library CurrencyRatioSortOrder {
     int256 constant NUMERATOR_MOST = 300;

src/libraries/Descriptor.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: UNLICENSED
-pragma solidity ^0.8.20;
+pragma solidity ^0.8.0;
 
 import {Currency, CurrencyLibrary} from "@uniswap/v4-core/src/types/Currency.sol";
 import {IHooks} from "@uniswap/v4-core/src/interfaces/IHooks.sol";
@@ -12,6 +12,7 @@ import {HexStrings} from "./HexStrings.sol";
 
 /// @title Descriptor
 /// @notice Describes NFT token positions
+/// @dev Reference: https://github.com/Uniswap/v3-periphery/blob/main/contracts/libraries/NFTDescriptor.sol
 library Descriptor {
     using TickMath for int24;
     using Strings for uint256;
@@ -37,7 +38,7 @@ library Descriptor {
         address hooks;
     }
 
-    /// @notice Constructs the token URI for a Uniswap V4 NFT
+    /// @notice Constructs the token URI for a Uniswap v4 NFT
     /// @param params Parameters needed to construct the token URI
     /// @return The token URI as a string
     function constructTokenURI(ConstructTokenURIParams calldata params) public pure returns (string memory) {
@@ -106,7 +107,7 @@ library Descriptor {
         return symbol;
     }
 
-    /// @notice Generates the first part of the description for a Uniswap V4 NFT
+    /// @notice Generates the first part of the description for a Uniswap v4 NFT
     /// @param quoteCurrencySymbol The symbol of the quote currency
     /// @param baseCurrencySymbol The symbol of the base currency
     /// @param poolManager The address of the pool manager
@@ -138,7 +139,7 @@ library Descriptor {
         );
     }
 
-    /// @notice Generates the second part of the description for a Uniswap V4 NFTs
+    /// @notice Generates the second part of the description for a Uniswap v4 NFTs
     /// @param tokenId The token ID
     /// @param baseCurrencySymbol The symbol of the base currency
     /// @param baseCurrency The address of the base currency
@@ -169,7 +170,7 @@ library Descriptor {
         );
     }
 
-    /// @notice Generates the name for a Uniswap V4 NFT
+    /// @notice Generates the name for a Uniswap v4 NFT
     /// @param params Parameters needed to generate the name
     /// @param feeTier The fee tier of the pool
     /// @return The name of the NFT
@@ -452,7 +453,7 @@ library Descriptor {
         return (uint256(uint160(addr))).toHexString(20);
     }
 
-    /// @notice Generates the SVG image for a Uniswap V4 NFT
+    /// @notice Generates the SVG image for a Uniswap v4 NFT
     /// @param params Parameters needed to generate the SVG image
     /// @return svg The SVG image as a string
     function generateSVGImage(ConstructTokenURIParams memory params) internal pure returns (string memory svg) {
@@ -503,7 +504,7 @@ library Descriptor {
         pure
         returns (string memory)
     {
-        return (n - inMn * (outMx - outMn) / (inMx - inMn) + outMn).toString();
+        return ((n - inMn) * (outMx - outMn) / (inMx - inMn) + outMn).toString();
     }
 
     function currencyToColorHex(uint256 currency, uint256 offset) internal pure returns (string memory str) {

src/libraries/HexStrings.sol

@@ -1,8 +1,9 @@
 // SPDX-License-Identifier: UNLICENSED
-pragma solidity ^0.8.20;
+pragma solidity ^0.8.0;
 
 /// @title HexStrings
 /// @notice Provides function for converting numbers to hexadecimal strings
+/// @dev Reference: https://github.com/Uniswap/v3-periphery/blob/main/contracts/libraries/HexStrings.sol
 library HexStrings {
     bytes16 internal constant ALPHABET = "0123456789abcdef";
 

src/libraries/SVG.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: UNLICENSED
-pragma solidity ^0.8.20;
+pragma solidity ^0.8.0;
 
 import {Currency, CurrencyLibrary} from "@uniswap/v4-core/src/types/Currency.sol";
 import {IHooks} from "@uniswap/v4-core/src/interfaces/IHooks.sol";
@@ -9,6 +9,7 @@ import {Base64} from "@openzeppelin/contracts/utils/Base64.sol";
 
 /// @title SVG
 /// @notice Provides a function for generating an SVG associated with a Uniswap NFT
+/// @dev Reference: https://github.com/Uniswap/v3-periphery/blob/main/contracts/libraries/NFTSVG.sol
 library SVG {
     using Strings for uint256;
 
@@ -48,7 +49,7 @@ library SVG {
         string y3;
     }
 
-    /// @notice Generate the SVG associated with a Uniswap V4 NFT
+    /// @notice Generate the SVG associated with a Uniswap v4 NFT
     /// @param params The SVGParams struct containing the parameters for the SVG
     /// @return svg The SVG string associated with the NFT
     function generateSVG(SVGParams memory params) internal pure returns (string memory svg) {

src/libraries/SafeERC20Namer.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: UNLICENSED
-pragma solidity ^0.8.20;
+pragma solidity ^0.8.0;
 
 import "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";
 import "./AddressStringUtil.sol";