From ac1371adabab75574b75ea030d282e4be1eeb0c2 Mon Sep 17 00:00:00 2001
From: KOSASIH <kosasihg88@gmail.com>
Date: Wed, 4 Dec 2024 16:40:03 +0700
Subject: [PATCH] Create NFTContract.sol

---
 .../smart_contracts/NFTContract.sol           | 48 +++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 coin/QuantumCoin/smart_contracts/NFTContract.sol

diff --git a/coin/QuantumCoin/smart_contracts/NFTContract.sol b/coin/QuantumCoin/smart_contracts/NFTContract.sol
new file mode 100644
index 000000000..0de2992c4
--- /dev/null
+++ b/coin/QuantumCoin/smart_contracts/NFTContract.sol
@@ -0,0 +1,48 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.0;
+
+import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
+import "@openzeppelin/contracts/access/Ownable.sol";
+import "@openzeppelin/contracts/utils/Counters.sol";
+
+contract NFTContract is ERC721, Ownable {
+    using Counters for Counters.Counter;
+    Counters.Counter private _tokenIdCounter;
+
+    // Mapping from token ID to token metadata URI
+    mapping(uint256 => string) private _tokenURIs;
+
+    // Event emitted when a new NFT is minted
+    event NFTMinted(address indexed owner, uint256 indexed tokenId, string tokenURI);
+
+    constructor() ERC721("QuantumNFT", "QNFT") {}
+
+    // Mint a new NFT
+    function mintNFT(address to, string memory tokenURI) external onlyOwner {
+        uint256 tokenId = _tokenIdCounter.current();
+        _mint(to, tokenId);
+        _setTokenURI(tokenId, tokenURI);
+        _tokenIdCounter.increment();
+
+        emit NFTMinted(to, tokenId, tokenURI);
+    }
+
+    // Set the token URI for a specific token ID
+    function _setTokenURI(uint256 tokenId, string memory tokenURI) internal {
+        require(_exists(tokenId), "ERC721Metadata: URI set of nonexistent token");
+        _tokenURIs[tokenId] = tokenURI;
+    }
+
+    // Override the base URI function
+    function tokenURI(uint256 tokenId) public view override returns (string memory) {
+        require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
+        return _tokenURIs[tokenId];
+    }
+
+    // Burn an NFT
+    function burn(uint256 tokenId) external {
+        require(ownerOf(tokenId) == msg.sender, "You are not the owner of this token");
+        _burn(tokenId);
+        delete _tokenURIs[tokenId];
+    }
+}