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MyNFT.sol
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MyNFT.sol
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// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
contract MyNFT is ERC721, Ownable {
string public myBaseURI;
mapping (uint256 => bool) private myTokensMinted;
uint256 private myTotalTokensMinted;
constructor(string memory _name, string memory _symbol, string memory _baseURI) ERC721(_name, _symbol) {
myBaseURI = _baseURI;
}
function createMyToken(address _to) public onlyOwner returns (uint256) {
require(myTotalTokensMinted < 100, "Maximum number of tokens minted");
uint256 tokenId = myTotalTokensMinted + 1;
myTokensMinted[tokenId] = true;
myTotalTokensMinted++;
_safeMint(_to, tokenId);
return tokenId;
}
function setMyBaseURI(string memory _newBaseURI) public onlyOwner {
myBaseURI = _newBaseURI;
}
function myTokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
return bytes(myBaseURI).length > 0 ? string(abi.encodePacked(myBaseURI, tokenId.toString())) : "";
}
function totalMyTokensMinted() public view returns (uint256) {
return myTotalTokensMinted;
}
function isMyTokenMinted(uint256 tokenId) public view returns (bool) {
return myTokensMinted[tokenId];
}
function burnMyToken(uint256 tokenId) public onlyOwner {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
_burn(tokenId);
myTotalTokensMinted--;
myTokensMinted[tokenId] = false;
}
}