ERC 721 未部署為合約

我正在嘗試在 Ropsten 網路上部署我的 ERC-721 合約。部署腳本成功返回了部署合約的地址。但是，當我在 Etherscan 上搜尋該地址時，它顯示為普通地址而不是 Contract。我做錯了什麼？

我正在使用 OpenZepplin 實現和 Hardhat 進行部署。這是我的契約：

pragma solidity ^0.7.3;

import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/utils/Counters.sol";
import "@openzeppelin/contracts/access/Ownable.sol";


contract Sakura is ERC721, Ownable {
   using Counters for Counters.Counter;
   Counters.Counter private _tokenIds;
   string public proofFile = ""; // IPFS URL WILL BE ADDED LATER
   bool public saleIsActive = false;
   uint public reserve = 125;
   uint256 public cost = 0.05 ether;

   constructor() ERC721("Sakura", "SAKURA") {}

   function mintNFT(address recipient, string memory tokenURI)
       public onlyOwner
       returns (uint256)
   {
       // require(msg.value >= cost, "Not enough ETH sent: check price.");

       _tokenIds.increment();

       uint256 newItemId = _tokenIds.current();
       _mint(recipient, newItemId);
       _setTokenURI(newItemId, tokenURI);

       return newItemId;
   }

   // function setTokenURIById (uint256 tokenId, string memory tokenURI) public onlyOwner{
   //     _setTokenURI(tokenId, tokenURI);
   // }
   

   function withdraw() public onlyOwner {
       uint balance = address(this).balance;
       msg.sender.transfer(balance);
   }

   function tokensOfOwner(address _owner) external view returns(uint256[] memory ) {
       uint256 tokenCount = balanceOf(_owner);
       if (tokenCount == 0) {
           // Return an empty array
           return new uint256[](0);
       } else {
           uint256[] memory result = new uint256[](tokenCount);
           uint256 index;
           for (index = 0; index < tokenCount; index++) {
               result[index] = tokenOfOwnerByIndex(_owner, index);
           }
           return result;
       }
   }

   function setProvenanceHash(string memory provenanceHash) public onlyOwner {
       proofFile = provenanceHash;
   }

   function flipSaleState() public onlyOwner {
       saleIsActive = !saleIsActive;
   }
}

這是部署腳本：

async function main() {
   // Grab the contract factory 
   const MyNFT = await ethers.getContractFactory("Sakura");

   // Start deployment, returning a promise that resolves to a contract object
   const myNFT = await MyNFT.deploy(); // Instance of the contract 
   console.log("Contract deployed to address:", myNFT.address);
}

main()
  .then(() => process.exit(0))
  .catch(error => {
    console.error(error);
    process.exit(1);
  });

在錢包地址上呼叫創建合約的函式，這可能需要一些時間，具體取決於網路擁塞、gas 費用等。如果您不斷刷新 Etherscan 頁面，您最終會看到呼叫的合約創建方法，並且地址從普通地址到合約地址。

引用自：https://ethereum.stackexchange.com/questions/121869