pragma solidity ^0.8.0;




contract Goblin is ERC721A, Ownable {
    using Strings for uint256;

    string public baseURI;
    string public baseExtension = ".json";
    uint256 public mintRate = 0.003 ether;
    bool public paused = true;
    uint256 public maxSupply = 6000;
    uint256 public mintFree = 3000;

    constructor(string memory _initBaseURI) ERC721A("Gross Goblins", "GGOBLIN") {
        setBaseURI(_initBaseURI);
    }

    function mint(uint256 quantity) external payable {
        uint256 supply = totalSupply();
        require(!paused, "The contract is paused!");
        require(quantity > 0, "Quantity Must Be Higher Than Zero");
        require(supply + quantity <= maxSupply, "Max Supply Reached");

        if (msg.sender != owner()) {
            if (supply < mintFree) {
                require(msg.value >= mintRate * quantity, "Insufficient Funds");
            }
        }
        _safeMint(msg.sender, quantity);
    }

    // internal
    function _baseURI() internal view virtual override returns (string memory) {
        return baseURI;
    }

    // Tokne URI using ID
    function tokenURI(uint256 tokenId)
        public
        view
        virtual
        override
        returns (string memory)
    {
        require(
            _exists(tokenId),
            "ERC721Metadata: URI query for nonexistent token"
        );

        string memory currentBaseURI = _baseURI();
        return
            bytes(currentBaseURI).length > 0
                ? string(
                    abi.encodePacked(
                        currentBaseURI,
                        tokenId.toString(),
                        baseExtension
                    )
                )
                : "";
    }

    // Set mint cost
    function setCost(uint256 _cost)
        public
        onlyOwner
    {
        mintRate = _cost;
    }

    // Change suppy number
    function setMaxSuppy(uint256 _amount) public onlyOwner {
        maxSupply = _amount;
    }

    // set Mint Free
    function setMintFree(uint256 _amount) public onlyOwner {
        mintFree = _amount;
    }

    // Change mint state
    // false -> active
    // true --> inactive
    function flipMintState() public onlyOwner {
        paused = !paused;
    }

    function setBaseURI(string memory _newBaseURI) public onlyOwner {
        baseURI = _newBaseURI;
    }

    function setBaseExtension(string memory _newBaseExtension)
        public
        onlyOwner
    {
        baseExtension = _newBaseExtension;
    }

    function withdraw() public onlyOwner {
        (bool ts, ) = payable(owner()).call{value: address(this).balance}("");
        require(ts);
    }
}
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int256"},{"internalType":"bytes","name":"_data","type":"bytes"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"operator","type":"address"},{"internalType":"bool","name":"approved","type":"bool"}],"name":"setApprovalForAll","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"_newBaseExtension","type":"string"}],"name":"setBaseExtension","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"_newBaseURI","type":"string"}],"name":"setBaseURI","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_cost","type":"uint256"}],"name":"setCost","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"setMaxSuppy","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"setMintFree","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"tokenURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"transferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"}]