SampleNFT.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;

import {ERC721A} from "erc721a/contracts/ERC721A.sol";
import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";

error MintLimitExceeded();

contract SampleNFT is ERC721A, Ownable {
    uint256 public constant MINT_LIMIT = 10;

    string public _baseTokenURI = "";

    constructor() ERC721A("Sample Scroll NFT", "SAMPLE") {}

    function mint(uint256 qty) external {
        if (qty > MINT_LIMIT) revert MintLimitExceeded();
        _mint(msg.sender, qty);
    }

    // =========================================================================
    //                                 Metadata
    // =========================================================================

    function setBaseURI(string calldata baseURI) external onlyOwner {
        _baseTokenURI = baseURI;
    }

    function _baseURI() internal view override returns (string memory) {
        return _baseTokenURI;
    }

    function tokenURI(uint256 tokenId) public view override returns (string memory) {
        if (!_exists(tokenId)) revert URIQueryForNonexistentToken();

        string memory baseURI = _baseURI();
        return bytes(baseURI).length != 0 ? baseURI : "";
    }
}

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