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CustomERC721.sol
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CustomERC721.sol
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.2;
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";
import "@openzeppelin/contracts/security/Pausable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Burnable.sol";
import "@openzeppelin/contracts/utils/Counters.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol";
contract CustomERC721 is ERC721, ERC721Enumerable, ERC721URIStorage, Pausable, Ownable, ERC721Burnable {
using Counters for Counters.Counter;
Counters.Counter private _tokenIdCounter;
constructor() ERC721("ERC721", "NFT") {}
event NFTMinted(uint indexed tokenId, address indexed to);
function pause() public onlyOwner {
_pause();
}
function unpause() public onlyOwner {
_unpause();
}
function safeMint(address to, string calldata _ipfsUri) public returns(uint){
uint256 tokenId = _tokenIdCounter.current();
// require(_ipfsURI == whitelisted, "we should add some logic to whitelist this or something maybe?");
_safeMint(to, tokenId);
_setTokenURI(tokenId, _ipfsUri);
_tokenIdCounter.increment();
emit NFTMinted(tokenId, address(to));
return tokenId;
}
function _beforeTokenTransfer(address from, address to, uint256 tokenId)
internal
whenNotPaused
override(ERC721, ERC721Enumerable)
{
super._beforeTokenTransfer(from, to, tokenId);
}
// The following functions are overrides required by Solidity.
function _burn(uint256 tokenId) internal override(ERC721, ERC721URIStorage) {
super._burn(tokenId);
}
// function addToPortfolio() {
// uint256 tokenId = 6;
// bytes memory tokenIdBytes = new bytes(32);
// assembly { mstore(add(tokenIdBytes, 32), tokenId) }
// safeTransferFrom(msg.sender, address(), 3, tokenIdBytes);
// }
function tokenURI(uint256 tokenId)
public
view
override(ERC721, ERC721URIStorage)
returns (string memory)
{
return super.tokenURI(tokenId);
}
function supportsInterface(bytes4 interfaceId)
public
view
override(ERC721, ERC721Enumerable)
returns (bool)
{
return super.supportsInterface(interfaceId);
}
}