data/static/web3-snippets/JuiceShopSBT.sol
// SPDX-License-Identifier: MIT
// vuln-code-snippet start nftUnlockChallenge
pragma solidity ^0.8.4;
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Counters.sol";
contract JuiceShopSBT is ERC721, ERC721URIStorage, Ownable {
using Counters for Counters.Counter;
Counters.Counter private _tokenIdCounter;
constructor() ERC721("JuiceShopSBT", "JS") {}
function safeMint(address to, string memory uri) public onlyOwner {
uint256 tokenId = _tokenIdCounter.current(); // vuln-code-snippet vuln-line nftUnlockChallenge
_tokenIdCounter.increment();
_safeMint(to, tokenId);
_setTokenURI(tokenId, uri);
}
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId // vuln-code-snippet neutral-line nftUnlockChallenge
) internal override virtual {
require(from == address(0), "Err: token transfer is BLOCKED");
super._beforeTokenTransfer(from, to, tokenId);
}
function _burn(uint256 tokenId) internal override(ERC721, ERC721URIStorage) { // vuln-code-snippet neutral-line nftUnlockChallenge
super._burn(tokenId);
}
function tokenURI(uint256 tokenId) // vuln-code-snippet neutral-line nftUnlockChallenge
public
view
override(ERC721, ERC721URIStorage)
returns (string memory)
{
return super.tokenURI(tokenId);
}
}
// vuln-code-snippet end nftUnlockChallenge