我的程式碼有效，但它不應該，我不明白為什麼

所以我有程式碼，我正在鑄造一個 NFT。我的元數據位於一個名為 tokenURI() 的函式中。但是當我執行我的腳本進行部署時，我從未真正呼叫過這個函式，但它仍然以某種方式用正確的元數據鑄造了我的 NFT。我很高興它正在工作，但實際上它根本不應該工作。為什麼我的 tokenURI() 函式會被呼叫？

Github repo 以備不時之需：https ://github.com/jaysnel/js-nft

正在執行的命令：

npx hardhat run scripts/deploy.js --network goerli

我的 .sol 文件：

// SPDX-License-Identifier: UNLICENSED

pragma solidity ^0.8.17;

// OpenZeppelin Contracts and hardhat
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol";
import "@openzeppelin/contracts/utils/Counters.sol";
import "hardhat/console.sol";

contract JSNFT is ERC721URIStorage {
   using Counters for Counters.Counter;
   Counters.Counter private _tokenIds;

   constructor() ERC721 ('jsNFT', 'JSNFT'){
       console.log('NFT contract deployed');
   }

   
   function makeJSNFT() public {
       uint256 newItemId = _tokenIds.current();
       _safeMint(msg.sender, newItemId);
       _tokenIds.increment();
   }


   function tokenURI(uint256 _tokenId) public view override returns (string memory) {
       require(_exists(_tokenId));
       console.log("An NFT SVG w/ ID %s has been minted to %s", _tokenId, msg.sender);
       return string(
           abi.encodePacked(
               "data:application/json;base64",
               "data:application/json;base64,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"
           )
       );
   }
}

部署.js：

const deployContract = async () => {
   const nftContractFactory = await hre.ethers.getContractFactory('JSNFT');
   const nftContract = await nftContractFactory.deploy();
   await nftContract.deployed();
   console.log("Contract deployed to:", nftContract.address);

   // Call the function
   let txn = await nftContract.makeJSNFT()
   await txn.wait()
 };


const main = async () => {
   try {
     await deployContract();
     process.exit(0);
   } catch (error) {
     console.log(error);
     process.exit(1);
   }
 };
 
 main();

makeJSNFT您的部署腳本使用該函式創建 NFT 。tokenURI與鑄幣本身無關，它只允許您獲取已經存在的元數據

引用自：https://ethereum.stackexchange.com/questions/137854