Question

I am getting below error while running the smart contract:

DeclarationError: Undeclared identifier. --> @openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol:35:9: | 35 | _requireOwned(tokenId); | ^^^^^^^^^^^^^

Smart contract code:

//SPDX-License-Identifier: Unlicense
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/utils/Counters.sol";
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol";

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

    constructor() ERC721("Real Estate", "REAL") {}

    function mint(string memory tokenURI) public returns (uint256) {
        _tokenIds.increment();

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

        return newItemId;
    }

    function totalSupply() public view returns (uint256) {
        return _tokenIds.current();
    }
}

I tried removing the _requireOwned(tokenId); from ERC721URIStorage.sol but still getting the error.

Any help would be appreciated.

I tried removing the _requireOwned(tokenId); from ERC721URIStorage.sol but still getting the error.

Also tried adding the _requireOwned(tokenId) into my smart contract but it s throwing same error.

Answer 1

* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *

import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC721/extensions/ERC721URIStorage.sol";

友情链接