// SPDX-License-Identifier: MIT
pragma solidity ^0.8.9 <0.9.0;

library Address {
    function isContract(address account) internal view returns (bool) {
        return account.code.length > 0;
    }
	
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCall(target, data, "Address: low-level call failed");
    }

    function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");

        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    function verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            if (returndata.length > 0) {
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

library Counters {
    struct Counter {
        uint256 _value;
    }

    function current(Counter storage counter) internal view returns (uint256) {
        return counter._value;
    }

    function increment(Counter storage counter) internal {
        unchecked {
            counter._value += 1;
        }
    }

    function decrement(Counter storage counter) internal {
        uint256 value = counter._value;
        require(value > 0, "Counter: decrement overflow");
        unchecked {
            counter._value = value - 1;
        }
    }

    function reset(Counter storage counter) internal {
        counter._value = 0;
    }
}

library Strings {
    bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
    uint8 private constant _ADDRESS_LENGTH = 20;

    function toString(uint256 value) internal pure returns (string memory) {
        if (value == 0) {
            return "0";
        }
        uint256 temp = value;
        uint256 digits;
        while (temp != 0) {
            digits++;
            temp /= 10;
        }
        bytes memory buffer = new bytes(digits);
        while (value != 0) {
            digits -= 1;
            buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
            value /= 10;
        }
        return string(buffer);
    }

    function toHexString(uint256 value) internal pure returns (string memory) {
        if (value == 0) {
            return "0x00";
        }
        uint256 temp = value;
        uint256 length = 0;
        while (temp != 0) {
            length++;
            temp >>= 8;
        }
        return toHexString(value, length);
    }

    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = _HEX_SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }

    function toHexString(address addr) internal pure returns (string memory) {
        return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);
    }
}

library MerkleProof {
    function verify(bytes32[] memory proof, bytes32 root, bytes32 leaf) internal pure returns (bool) {
        return processProof(proof, leaf) == root;
    }

    function verifyCalldata(bytes32[] calldata proof, bytes32 root, bytes32 leaf) internal pure returns (bool) {
        return processProofCalldata(proof, leaf) == root;
    }

    function processProof(bytes32[] memory proof, bytes32 leaf) internal pure returns (bytes32) {
        bytes32 computedHash = leaf;
        for (uint256 i = 0; i < proof.length; i++) {
            computedHash = _hashPair(computedHash, proof[i]);
        }
        return computedHash;
    }

    function processProofCalldata(bytes32[] calldata proof, bytes32 leaf) internal pure returns (bytes32) {
        bytes32 computedHash = leaf;
        for (uint256 i = 0; i < proof.length; i++) {
            computedHash = _hashPair(computedHash, proof[i]);
        }
        return computedHash;
    }

    function multiProofVerify(bytes32[] memory proof, bool[] memory proofFlags, bytes32 root, bytes32[] memory leaves) internal pure returns (bool) {
        return processMultiProof(proof, proofFlags, leaves) == root;
    }

    function multiProofVerifyCalldata(bytes32[] calldata proof, bool[] calldata proofFlags, bytes32 root, bytes32[] memory leaves) internal pure returns (bool) {
        return processMultiProofCalldata(proof, proofFlags, leaves) == root;
    }

    function processMultiProof(bytes32[] memory proof, bool[] memory proofFlags, bytes32[] memory leaves) internal pure returns (bytes32 merkleRoot) {
        uint256 leavesLen = leaves.length;
        uint256 totalHashes = proofFlags.length;
        require(leavesLen + proof.length - 1 == totalHashes, "MerkleProof: invalid multiproof");

        bytes32[] memory hashes = new bytes32[](totalHashes);
        uint256 leafPos = 0;
        uint256 hashPos = 0;
        uint256 proofPos = 0;

        for (uint256 i = 0; i < totalHashes; i++) {
            bytes32 a = leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++];
            bytes32 b = proofFlags[i] ? leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++] : proof[proofPos++];
            hashes[i] = _hashPair(a, b);
        }

        if (totalHashes > 0) {
            return hashes[totalHashes - 1];
        } else if (leavesLen > 0) {
            return leaves[0];
        } else {
            return proof[0];
        }
    }

    function processMultiProofCalldata(bytes32[] calldata proof, bool[] calldata proofFlags, bytes32[] memory leaves) internal pure returns (bytes32 merkleRoot) {
        uint256 leavesLen = leaves.length;
        uint256 totalHashes = proofFlags.length;
        require(leavesLen + proof.length - 1 == totalHashes, "MerkleProof: invalid multiproof");

        bytes32[] memory hashes = new bytes32[](totalHashes);
        uint256 leafPos = 0;
        uint256 hashPos = 0;
        uint256 proofPos = 0;
        for (uint256 i = 0; i < totalHashes; i++) {
            bytes32 a = leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++];
            bytes32 b = proofFlags[i] ? leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++] : proof[proofPos++];
            hashes[i] = _hashPair(a, b);
        }

        if (totalHashes > 0) {
            return hashes[totalHashes - 1];
        } else if (leavesLen > 0) {
            return leaves[0];
        } else {
            return proof[0];
        }
    }

    function _hashPair(bytes32 a, bytes32 b) private pure returns (bytes32) {
        return a < b ? _efficientHash(a, b) : _efficientHash(b, a);
    }

    function _efficientHash(bytes32 a, bytes32 b) private pure returns (bytes32 value) {
        assembly {
            mstore(0x00, a)
            mstore(0x20, b)
            value := keccak256(0x00, 0x40)
        }
    }
}

interface IERC165 {
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

interface IERC721 is IERC165 {
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
    function balanceOf(address owner) external view returns (uint256 balance);
    function ownerOf(uint256 tokenId) external view returns (address owner);
    function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external;
    function safeTransferFrom(address from, address to, uint256 tokenId) external;
    function transferFrom(address from, address to, uint256 tokenId) external;
    function approve(address to, uint256 tokenId) external;
    function setApprovalForAll(address operator, bool _approved) external;
    function getApproved(uint256 tokenId) external view returns (address operator);
    function isApprovedForAll(address owner, address operator) external view returns (bool);
}

interface IOperatorFilterRegistry {
    function isOperatorAllowed(address registrant, address operator) external view returns (bool);
    function register(address registrant) external;
    function registerAndSubscribe(address registrant, address subscription) external;
    function registerAndCopyEntries(address registrant, address registrantToCopy) external;
    function unregister(address addr) external;
    function updateOperator(address registrant, address operator, bool filtered) external;
    function updateOperators(address registrant, address[] calldata operators, bool filtered) external;
    function updateCodeHash(address registrant, bytes32 codehash, bool filtered) external;
    function updateCodeHashes(address registrant, bytes32[] calldata codeHashes, bool filtered) external;
    function subscribe(address registrant, address registrantToSubscribe) external;
    function unsubscribe(address registrant, bool copyExistingEntries) external;
    function subscriptionOf(address addr) external returns (address registrant);
    function subscribers(address registrant) external returns (address[] memory);
    function subscriberAt(address registrant, uint256 index) external returns (address);
    function copyEntriesOf(address registrant, address registrantToCopy) external;
    function isOperatorFiltered(address registrant, address operator) external returns (bool);
    function isCodeHashOfFiltered(address registrant, address operatorWithCode) external returns (bool);
    function isCodeHashFiltered(address registrant, bytes32 codeHash) external returns (bool);
    function filteredOperators(address addr) external returns (address[] memory);
    function filteredCodeHashes(address addr) external returns (bytes32[] memory);
    function filteredOperatorAt(address registrant, uint256 index) external returns (address);
    function filteredCodeHashAt(address registrant, uint256 index) external returns (bytes32);
    function isRegistered(address addr) external returns (bool);
    function codeHashOf(address addr) external returns (bytes32);
}

interface IERC721Metadata is IERC721 {
    function name() external view returns (string memory);
    function symbol() external view returns (string memory);
    function tokenURI(uint256 tokenId) external view returns (string memory);
}

interface IERC721Receiver {
    function onERC721Received(address operator, address from, uint256 tokenId, bytes calldata data) external returns (bytes4);
}

abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    constructor() {
        _transferOwnership(_msgSender());
    }

    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    function owner() public view virtual returns (address) {
        return _owner;
    }

    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

abstract contract OperatorFilterer {
    error OperatorNotAllowed(address operator);
    IOperatorFilterRegistry constant operatorFilterRegistry = IOperatorFilterRegistry(0x000000000000AAeB6D7670E522A718067333cd4E);
    
	constructor(address subscriptionOrRegistrantToCopy, bool subscribe) {
        if (address(operatorFilterRegistry).code.length > 0) {
            if (subscribe) {
                operatorFilterRegistry.registerAndSubscribe(address(this), subscriptionOrRegistrantToCopy);
            } else {
                if (subscriptionOrRegistrantToCopy != address(0)) {
                    operatorFilterRegistry.registerAndCopyEntries(address(this), subscriptionOrRegistrantToCopy);
                } else {
                    operatorFilterRegistry.register(address(this));
                }
            }
        }
    }

    modifier onlyAllowedOperator(address from) virtual {
        if (address(operatorFilterRegistry).code.length > 0) {
            if (from == msg.sender) {
                _;
                return;
            }
            if (
                !(
                    operatorFilterRegistry.isOperatorAllowed(address(this), msg.sender)
                        && operatorFilterRegistry.isOperatorAllowed(address(this), from)
                )
            ) {
                revert OperatorNotAllowed(msg.sender);
            }
        }
        _;
    }
}

abstract contract ERC165 is IERC165 {
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IERC165).interfaceId;
    }
}

abstract contract DefaultOperatorFilterer is OperatorFilterer {
    address constant DEFAULT_SUBSCRIPTION = address(0x3cc6CddA760b79bAfa08dF41ECFA224f810dCeB6);
    constructor() OperatorFilterer(DEFAULT_SUBSCRIPTION, true) {}
}

contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
    using Address for address;
    using Strings for uint256;

    string private _name;
    string private _symbol;
    mapping(uint256 => address) private _owners;
    mapping(address => uint256) private _balances;
    mapping(uint256 => address) private _tokenApprovals;
    mapping(address => mapping(address => bool)) private _operatorApprovals;

    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
        return
            interfaceId == type(IERC721).interfaceId ||
            interfaceId == type(IERC721Metadata).interfaceId ||
            super.supportsInterface(interfaceId);
    }

    function balanceOf(address owner) public view virtual override returns (uint256) {
        require(owner != address(0), "ERC721: address zero is not a valid owner");
        return _balances[owner];
    }

    function ownerOf(uint256 tokenId) public view virtual override returns (address) {
        address owner = _owners[tokenId];
        require(owner != address(0), "ERC721: invalid token ID");
        return owner;
    }

    function name() public view virtual override returns (string memory) {
        return _name;
    }

    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
        _requireMinted(tokenId);
        string memory baseURI = _baseURI();
        return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString(), ".json")) : "";
    }

    function _baseURI() internal view virtual returns (string memory) {
        return "";
    }

    function approve(address to, uint256 tokenId) public virtual override {
        address owner = ERC721.ownerOf(tokenId);
        require(to != owner, "ERC721: approval to current owner");
        require(_msgSender() == owner || isApprovedForAll(owner, _msgSender()), "ERC721: approve caller is not token owner nor approved for all");
        _approve(to, tokenId);
    }

    function getApproved(uint256 tokenId) public view virtual override returns (address) {
        _requireMinted(tokenId);
        return _tokenApprovals[tokenId];
    }

    function setApprovalForAll(address operator, bool approved) public virtual override {
        _setApprovalForAll(_msgSender(), operator, approved);
    }

	function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
		return _operatorApprovals[owner][operator];
	}

    function transferFrom(address from, address to, uint256 tokenId) public virtual override {
        require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: caller is not token owner nor approved");
        _transfer(from, to, tokenId);
    }

    function safeTransferFrom(address from, address to, uint256 tokenId) public virtual override {
        safeTransferFrom(from, to, tokenId, "");
    }

    function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory data) public virtual override {
        require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: caller is not token owner nor approved");
        _safeTransfer(from, to, tokenId, data);
    }

    function _safeTransfer(address from, address to, uint256 tokenId, bytes memory data) internal virtual {
        _transfer(from, to, tokenId);
        require(_checkOnERC721Received(from, to, tokenId, data), "ERC721: transfer to non ERC721Receiver implementer");
    }

    function _exists(uint256 tokenId) internal view virtual returns (bool) {
        return _owners[tokenId] != address(0);
    }

    function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
        address owner = ERC721.ownerOf(tokenId);
        return (spender == owner || isApprovedForAll(owner, spender) || getApproved(tokenId) == spender);
    }

    function _safeMint(address to, uint256 tokenId) internal virtual {
        _safeMint(to, tokenId, "");
    }

    function _safeMint(address to, uint256 tokenId, bytes memory data) internal virtual {
        _mint(to, tokenId);
        require(_checkOnERC721Received(address(0), to, tokenId, data), "ERC721: transfer to non ERC721Receiver implementer");
    }

    function _mint(address to, uint256 tokenId) internal virtual {
        require(to != address(0), "ERC721: mint to the zero address");
        require(!_exists(tokenId), "ERC721: token already minted");
        _beforeTokenTransfer(address(0), to, tokenId);
        _balances[to] += 1;
        _owners[tokenId] = to;
        emit Transfer(address(0), to, tokenId);
        _afterTokenTransfer(address(0), to, tokenId);
    }

    function _burn(uint256 tokenId) internal virtual {
        address owner = ERC721.ownerOf(tokenId);
        _beforeTokenTransfer(owner, address(0), tokenId);
        _approve(address(0), tokenId);
        _balances[owner] -= 1;
        delete _owners[tokenId];
        emit Transfer(owner, address(0), tokenId);
        _afterTokenTransfer(owner, address(0), tokenId);
    }

    function _transfer(address from, address to, uint256 tokenId) internal virtual {
        require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer from incorrect owner");
        require(to != address(0), "ERC721: transfer to the zero address");
        _beforeTokenTransfer(from, to, tokenId);
        _approve(address(0), tokenId);
        _balances[from] -= 1;
        _balances[to] += 1;
        _owners[tokenId] = to;
        emit Transfer(from, to, tokenId);
        _afterTokenTransfer(from, to, tokenId);
    }

    function _approve(address to, uint256 tokenId) internal virtual {
        _tokenApprovals[tokenId] = to;
        emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
    }

    function _setApprovalForAll(address owner, address operator, bool approved) internal virtual {
        require(owner != operator, "ERC721: approve to caller");
        _operatorApprovals[owner][operator] = approved;
        emit ApprovalForAll(owner, operator, approved);
    }

    function _requireMinted(uint256 tokenId) internal view virtual {
        require(_exists(tokenId), "ERC721: invalid token ID");
    }

    function _checkOnERC721Received(address from, address to, uint256 tokenId, bytes memory data) private returns (bool) {
        if (to.isContract()) {
            try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, data) returns (bytes4 retval) {
                return retval == IERC721Receiver.onERC721Received.selector;
            } catch (bytes memory reason) {
                if (reason.length == 0) {
                    revert("ERC721: transfer to non ERC721Receiver implementer");
                } else {
                    assembly {
                        revert(add(32, reason), mload(reason))
                    }
                }
            }
        } else {
            return true;
        }
    }
    function _beforeTokenTransfer(address from, address to, uint256 tokenId) internal virtual {}
    function _afterTokenTransfer(address from, address to, uint256 tokenId) internal virtual {}
}

contract ERC721F is Ownable, ERC721, DefaultOperatorFilterer {
    using Counters for Counters.Counter;

    Counters.Counter private _tokenSupply;

    string private _baseTokenURI;

    constructor(string memory name_, string memory symbol_) ERC721(name_, symbol_) {
    }

    function walletOfOwner(address _owner) external view returns (uint256[] memory){
        uint256 ownerTokenCount = balanceOf(_owner);
        uint256[] memory ownedTokenIds = new uint256[](ownerTokenCount);
        uint256 currentTokenId = _startTokenId();
        uint256 ownedTokenIndex = 0;

        while (ownedTokenIndex < ownerTokenCount && currentTokenId < _tokenSupply.current()) {
            if (ownerOf(currentTokenId) == _owner) {
                ownedTokenIds[ownedTokenIndex] = currentTokenId;
                unchecked{ ownedTokenIndex++;}
            }
            unchecked{ currentTokenId++;}
        }
        return ownedTokenIds;
    }
    
    function _startTokenId() internal view virtual returns (uint256) {
        return 0;
    }

    function _baseURI() internal view virtual override returns (string memory) {
        return _baseTokenURI;
    }

    function setBaseTokenURI(string memory baseURI) public onlyOwner {
        _baseTokenURI = baseURI;
    }

    function _mint(address to, uint256 tokenId) internal virtual override {
        super._mint(to, tokenId);
        _tokenSupply.increment();
    }
	
    function transferFrom(address from, address to, uint256 tokenId) public override onlyAllowedOperator(from) {
        super.transferFrom(from, to, tokenId);
    }

    function safeTransferFrom(address from, address to, uint256 tokenId) public override onlyAllowedOperator(from) {
        super.safeTransferFrom(from, to, tokenId);
    }

    function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory data) public override onlyAllowedOperator(from) {
        super.safeTransferFrom(from, to, tokenId, data);
    }
	
    function totalSupply() public view returns (uint256) {
        return _tokenSupply.current();
    }
}

abstract contract ERC721Payable {
    function _withdraw(address _address, uint256 _amount) internal {
        (bool success, ) = _address.call{ value: _amount }("");
        require(success, "Failed to withdraw Ether");
    }
    receive() external payable { }
}

contract ERC721FCOMMON is ERC721F, ERC721Payable {
    constructor(string memory name_, string memory symbol_) ERC721F(name_, symbol_) {
    }
}

contract MinerBox is ERC721FCOMMON {
    uint256 public tokenPrice = 0.06 ether; 
    uint256 public preSaleTokenPrice = 0.04 ether;
    uint256 public constant MAX_TOKENS = 10000;
	uint256 public constant MINT_LIMIT = 8601;
    uint public constant MAX_RESERVE = 1399;
    uint256 public CLAIM_TOKENS = 601;
    uint public saleState;

    bytes32 public preSaleMerkleRoot;
    bytes32 public claimlistMerkleRoot;
	mapping(address => uint256) private userBalancePreSaleMint;
    mapping(address => uint256) private userBalance;
    
    constructor() ERC721FCOMMON("MinerBox", "SMB") {
        setBaseTokenURI("https://mint.ordersatoshi.com/erc721/");
        _mint(msg.sender, 0);
    }

    function airdrop(address to, uint256 numberOfTokens) public onlyOwner {    
        uint supply = totalSupply();
		require(numberOfTokens != 0, "numberOfNfts cannot be 0");
        require(supply + numberOfTokens <= MAX_TOKENS, "Reserve would exceed max supply of Tokens");
        require(numberOfTokens < MAX_RESERVE, "Can only mint reserved tokens at a time");
        for (uint i = 0; i < numberOfTokens;) {
            _safeMint(to, supply + i);
            unchecked{ i++;}
        }
    }

    function setMintPrice(uint256 price) external onlyOwner {
        tokenPrice = price;
    }
	
    function setPresalePrice(uint256 price) external onlyOwner {
        preSaleTokenPrice = price;
    }

    function setClaimTokens(uint256 limit) external onlyOwner {
        CLAIM_TOKENS = limit;
    }
	
    function setMerkleRoot(uint256 _ID, bytes32 _newRoot) external onlyOwner {
        require(_ID < 3 && _ID > 0, "!id");
        if (_ID == 2) {
            preSaleMerkleRoot = _newRoot;
        } else if (_ID == 1) {
            claimlistMerkleRoot = _newRoot;
        }
    }

    function setSaleState(uint256 _id) external onlyOwner {
        require(_id < 4, "!id");
        saleState=_id;
    }

    function mint(uint256 numberOfTokens) external payable {
        require(numberOfTokens != 0, "numberOfNfts cannot be 0");
        require(msg.sender == tx.origin, "No Contracts allowed.");
        require(numberOfTokens < 4, "Can only mint 3 tokens at a time");
        require(tokenPrice * numberOfTokens <= msg.value, "Ether value sent is not correct");
        require(saleState==3, "Sale NOT active yet");
        uint256 supply = totalSupply();
        require(supply + numberOfTokens <= MINT_LIMIT, "Purchase would exceed max mint limit of Tokens");
        for (uint256 i; i < numberOfTokens; ) {
            _mint(msg.sender, supply + i);
            unchecked {
                i++;
            }
        }
    }

    function claim(uint256 numberOfTokens, bytes32[] calldata merkleProof) external {
        require(numberOfTokens != 0, "numberOfNfts cannot be 0");
        require(userBalance[msg.sender]+numberOfTokens<2,"Max claim is 1 token");
        require(saleState==1, "Claim is not active yet");
        uint256 supply = totalSupply();
        require(supply + numberOfTokens <= CLAIM_TOKENS, "Purchase would exceed max claim supply of Tokens");
        require(checkValidity(merkleProof, claimlistMerkleRoot), "Invalid Merkle Proof");
        userBalance[msg.sender] += numberOfTokens;
        for (uint256 i; i < numberOfTokens; ) {
            _safeMint(msg.sender, supply + i);
            unchecked {
                i++;
            }
        }
    }

    function mintPreSale(uint256 numberOfTokens, bytes32[] calldata merkleProof) external payable {
        require(numberOfTokens != 0, "numberOfNfts cannot be 0");
        require(userBalancePreSaleMint[msg.sender]+numberOfTokens<4,"Max mint is 3 tokens");
        require(saleState==2, "PreSale is not active yet");
        require(preSaleTokenPrice * numberOfTokens <= msg.value, "Ether value sent is not correct");
        uint256 supply = totalSupply();
        require(supply + numberOfTokens <= MINT_LIMIT, "Purchase would exceed max mint limit of Tokens");
        require(checkValidity(merkleProof, preSaleMerkleRoot), "Invalid Merkle Proof");
		userBalancePreSaleMint[msg.sender] += numberOfTokens;
        for (uint256 i; i < numberOfTokens; ) {
            _safeMint(msg.sender, supply + i);
            unchecked {
                i++;
            }
        }
    }

    function checkValidity(bytes32[] calldata merkleProof, bytes32 root) internal view returns (bool) {
        bytes32 leafToCheck = keccak256(abi.encodePacked(msg.sender));
        return MerkleProof.verify(merkleProof, root, leafToCheck);
    }

    function withdraw() external onlyOwner {
        uint256 balance = address(this).balance;
        require(balance > 0, "Insufficient balance");
        _withdraw(owner(), address(this).balance);
    }
}