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// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.3.2 (utils/Address.sol)

pragma solidity ^0.8.0;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        assembly {
            size := extcodesize(account)
        }
        return size > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    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");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    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");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    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);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    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);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    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);
    }

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.3.2 (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.3.2 (utils/introspection/ERC165.sol)

pragma solidity ^0.8.0;

import "../Interface/IERC165.sol";

/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
 * for the additional interface id that will be supported. For example:
 *
 * ```solidity
 * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
 *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
 * }
 * ```
 *
 * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
 */
abstract contract ERC165 is IERC165 {
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IERC165).interfaceId;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.3.2 (token/ERC721/ERC721.sol)

pragma solidity ^0.8.0;

import "../Interface/IERC721.sol";
import "../Interface/IERC721Receiver.sol";
import "../Interface/IERC721Metadata.sol";
import "../utils/Address.sol";
import "../utils/Context.sol";
import "../utils/Strings.sol";
import "./ERC165.sol";

/**
 * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
 * the Metadata extension, but not including the Enumerable extension, which is available separately as
 * {ERC721Enumerable}.
 */
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {

    using Address for address;
    using Strings for uint256;

    // Token name
    string private _name;

    // Token symbol
    string private _symbol;

    // Mapping from token ID to owner address
    mapping(uint256 => address) private _owners;

    // Mapping owner address to token count
    mapping(address => uint256) private _balances;

    // Mapping from token ID to approved address
    mapping(uint256 => address) private _tokenApprovals;

    // Mapping from owner to operator approvals
    mapping(address => mapping(address => bool)) private _operatorApprovals;

    /**
     * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
     */
    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
        return
            interfaceId == type(IERC721).interfaceId ||
            interfaceId == type(IERC721Metadata).interfaceId ||
            super.supportsInterface(interfaceId);
    }

    /**
     * @dev See {IERC721-balanceOf}.
     */
    function balanceOf(address owner) public view virtual override returns (uint256) {
        require(owner != address(0), "ERC721: balance query for the zero address");
        return _balances[owner];
    }

    /**
     * @dev See {IERC721-ownerOf}.
     */
    function ownerOf(uint256 tokenId) public view virtual override returns (address) {
        address owner = _owners[tokenId];
        require(owner != address(0), "ERC721: owner query for nonexistent token");
        return owner;
    }

    /**
     * @dev See {IERC721Metadata-name}.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev See {IERC721Metadata-symbol}.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev See {IERC721Metadata-tokenURI}.
     */

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

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

    /**
     * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
     * token will be the concatenation of the `baseURI` and the `tokenId`. Empty
     * by default, can be overriden in child contracts.
     */
    function _baseURI() internal view virtual returns (string memory) {
        return "";
    }

    /**
     * @dev See {IERC721-approve}.
     */
    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 owner nor approved for all"
        );

        _approve(to, tokenId);
    }

    /**
     * @dev See {IERC721-getApproved}.
     */
    function getApproved(uint256 tokenId) public view virtual override returns (address) {
        require(_exists(tokenId), "ERC721: approved query for nonexistent token");

        return _tokenApprovals[tokenId];
    }

    /**
     * @dev See {IERC721-setApprovalForAll}.
     */
    function setApprovalForAll(address operator, bool approved) public virtual override {
        _setApprovalForAll(_msgSender(), operator, approved);
    }

    /**
     * @dev See {IERC721-isApprovedForAll}.
     */
    function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
        return _operatorApprovals[owner][operator];
    }

    /**
     * @dev See {IERC721-transferFrom}.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) public virtual override {
        //solhint-disable-next-line max-line-length
        require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");

        _transfer(from, to, tokenId);
    }

    /**
     * @dev See {IERC721-safeTransferFrom}.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) public virtual override {
        safeTransferFrom(from, to, tokenId, "");
    }

    /**
     * @dev See {IERC721-safeTransferFrom}.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) public virtual override {
        require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
        _safeTransfer(from, to, tokenId, _data);
    }

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
     *
     * `_data` is additional data, it has no specified format and it is sent in call to `to`.
     *
     * This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
     * implement alternative mechanisms to perform token transfer, such as signature-based.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    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");
    }

    /**
     * @dev Returns whether `tokenId` exists.
     *
     * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
     *
     * Tokens start existing when they are minted (`_mint`),
     * and stop existing when they are burned (`_burn`).
     */
    function _exists(uint256 tokenId) internal view virtual returns (bool) {
        return _owners[tokenId] != address(0);
    }

    /**
     * @dev Returns whether `spender` is allowed to manage `tokenId`.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
        require(_exists(tokenId), "ERC721: operator query for nonexistent token");
        address owner = ERC721.ownerOf(tokenId);
        return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
    }

    /**
     * @dev Safely mints `tokenId` and transfers it to `to`.
     *
     * Requirements:
     *
     * - `tokenId` must not exist.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function _safeMint(address to, uint256 tokenId) internal virtual {
        _safeMint(to, tokenId, "");
    }

    /**
     * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
     * forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
     */
    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"
        );
    }

    /**
     * @dev Mints `tokenId` and transfers it to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
     *
     * Requirements:
     *
     * - `tokenId` must not exist.
     * - `to` cannot be the zero address.
     *
     * Emits a {Transfer} event.
     */
    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);
    }

    /**
     * @dev Destroys `tokenId`.
     * The approval is cleared when the token is burned.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     *
     * Emits a {Transfer} event.
     */
    function _burn(uint256 tokenId) internal virtual {
        address owner = ERC721.ownerOf(tokenId);

        _beforeTokenTransfer(owner, address(0), tokenId);

        // Clear approvals
        _approve(address(0), tokenId);

        _balances[owner] -= 1;
        delete _owners[tokenId];

        emit Transfer(owner, address(0), tokenId);
    }

    /**
     * @dev Transfers `tokenId` from `from` to `to`.
     *  As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     *
     * Emits a {Transfer} event.
     */
    function _transfer(
        address from,
        address to,
        uint256 tokenId
    ) internal virtual {
        require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
        require(to != address(0), "ERC721: transfer to the zero address");

        _beforeTokenTransfer(from, to, tokenId);

        // Clear approvals from the previous owner
        _approve(address(0), tokenId);

        _balances[from] -= 1;
        _balances[to] += 1;
        _owners[tokenId] = to;

        emit Transfer(from, to, tokenId);
    }

    /**
     * @dev Approve `to` to operate on `tokenId`
     *
     * Emits a {Approval} event.
     */
    function _approve(address to, uint256 tokenId) internal virtual {
        _tokenApprovals[tokenId] = to;
        emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
    }

    /**
     * @dev Approve `operator` to operate on all of `owner` tokens
     *
     * Emits a {ApprovalForAll} event.
     */
    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);
    }

    /**
     * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
     * The call is not executed if the target address is not a contract.
     *
     * @param from address representing the previous owner of the given token ID
     * @param to target address that will receive the tokens
     * @param tokenId uint256 ID of the token to be transferred
     * @param _data bytes optional data to send along with the call
     * @return bool whether the call correctly returned the expected magic value
     */
    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;
        }
    }

    /**
     * @dev Hook that is called before any token transfer. This includes minting
     * and burning.
     *
     * Calling conditions:
     *
     * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
     * transferred to `to`.
     * - When `from` is zero, `tokenId` will be minted for `to`.
     * - When `to` is zero, ``from``'s `tokenId` will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 tokenId
    ) internal virtual {}
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.3.2 (token/ERC721/extensions/ERC721Enumerable.sol)

pragma solidity ^0.8.0;

import "./ERC721.sol";
import "../Interface/IERC721Enumerable.sol";

/**
 * @dev This implements an optional extension of {ERC721} defined in the EIP that adds
 * enumerability of all the token ids in the contract as well as all token ids owned by each
 * account.
 */
abstract contract ERC721Enumerable is ERC721, IERC721Enumerable {
    // Mapping from owner to list of owned token IDs
    mapping(address => mapping(uint256 => uint256)) private _ownedTokens;

    // Mapping from token ID to index of the owner tokens list
    mapping(uint256 => uint256) private _ownedTokensIndex;

    // Array with all token ids, used for enumeration
    uint256[] private _allTokens;

    // Mapping from token id to position in the allTokens array
    mapping(uint256 => uint256) private _allTokensIndex;

    mapping(uint256 => bool) staking;

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC721) returns (bool) {
        return interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId);
    }

    /**
     * @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
     */
    function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) {
        require(index < ERC721.balanceOf(owner), "ERC721Enumerable: owner index out of bounds");
        return _ownedTokens[owner][index];
    }

    /**
     * @dev See {IERC721Enumerable-totalSupply}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        return _allTokens.length;
    }

    /**
     * @dev See {IERC721Enumerable-tokenByIndex}.
     */
    function tokenByIndex(uint256 index) public view virtual override returns (uint256) {
        require(index < ERC721Enumerable.totalSupply(), "ERC721Enumerable: global index out of bounds");
        return _allTokens[index];
    }

    /**
     * @dev Hook that is called before any token transfer. This includes minting
     * and burning.
     *
     * Calling conditions:
     *
     * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
     * transferred to `to`.
     * - When `from` is zero, `tokenId` will be minted for `to`.
     * - When `to` is zero, ``from``'s `tokenId` will be burned.
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 tokenId
    ) internal virtual override {
        require(!staking[tokenId], "ERC721Enumerable: token is staking");
        super._beforeTokenTransfer(from, to, tokenId);

        if (from == address(0)) {
            _addTokenToAllTokensEnumeration(tokenId);
        } else if (from != to) {
            _removeTokenFromOwnerEnumeration(from, tokenId);
        }
        if (to == address(0)) {
            _removeTokenFromAllTokensEnumeration(tokenId);
        } else if (to != from) {
            _addTokenToOwnerEnumeration(to, tokenId);
        }
    }

    /**
     * @dev Private function to add a token to this extension's ownership-tracking data structures.
     * @param to address representing the new owner of the given token ID
     * @param tokenId uint256 ID of the token to be added to the tokens list of the given address
     */
    function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private {
        uint256 length = ERC721.balanceOf(to);
        _ownedTokens[to][length] = tokenId;
        _ownedTokensIndex[tokenId] = length;
    }

    /**
     * @dev Private function to add a token to this extension's token tracking data structures.
     * @param tokenId uint256 ID of the token to be added to the tokens list
     */
    function _addTokenToAllTokensEnumeration(uint256 tokenId) private {
        _allTokensIndex[tokenId] = _allTokens.length;
        _allTokens.push(tokenId);
    }

    /**
     * @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that
     * while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for
     * gas optimizations e.g. when performing a transfer operation (avoiding double writes).
     * This has O(1) time complexity, but alters the order of the _ownedTokens array.
     * @param from address representing the previous owner of the given token ID
     * @param tokenId uint256 ID of the token to be removed from the tokens list of the given address
     */
    function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private {
        // To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and
        // then delete the last slot (swap and pop).

        uint256 lastTokenIndex = ERC721.balanceOf(from) - 1;
        uint256 tokenIndex = _ownedTokensIndex[tokenId];

        // When the token to delete is the last token, the swap operation is unnecessary
        if (tokenIndex != lastTokenIndex) {
            uint256 lastTokenId = _ownedTokens[from][lastTokenIndex];

            _ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
            _ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
        }

        // This also deletes the contents at the last position of the array
        delete _ownedTokensIndex[tokenId];
        delete _ownedTokens[from][lastTokenIndex];
    }

    /**
     * @dev Private function to remove a token from this extension's token tracking data structures.
     * This has O(1) time complexity, but alters the order of the _allTokens array.
     * @param tokenId uint256 ID of the token to be removed from the tokens list
     */
    function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private {
        // To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and
        // then delete the last slot (swap and pop).

        uint256 lastTokenIndex = _allTokens.length - 1;
        uint256 tokenIndex = _allTokensIndex[tokenId];

        // When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so
        // rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding
        // an 'if' statement (like in _removeTokenFromOwnerEnumeration)
        uint256 lastTokenId = _allTokens[lastTokenIndex];

        _allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
        _allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index

        // This also deletes the contents at the last position of the array
        delete _allTokensIndex[tokenId];
        _allTokens.pop();
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./Owner.sol";
import "./token/ERC721Enumerable.sol";
import "./Interface/IMachinie.sol";
import "./Interface/IERC20.sol";

contract Humach  is ERC721Enumerable, Ownable
{
    using Strings for uint256;
    mapping(uint256 => uint256)private level;
    mapping(uint256 => uint256) private exp;
    mapping(uint256 => uint256) private stakeTime;
    mapping(address => uint8) private whiteListsMints;
    mapping(address => bool) private whiteLists;
    mapping(uint256 => uint256) breedFee;
    mapping(uint256 => string) private idName;
    mapping(uint256 => string) private idDescription; 
    
    address private machinieOld = 0xE6d3e488b9D31943dF6e3B7d82f6F842679a1a8c;
    address private blackHole = 0x000000000000000000000000000000000000dEaD;
    
    address private machinieNew = 0xB826bDe739897ad50363d045d65eE5b83FDb730d ; 
    address private floppy = 0x9F3dDF3309D501FfBDC4587ab11e9D61ADD3126a;    

    uint256 private tokenId = 888; 
    uint256 private mintFee = 0.068 ether;
    uint256 private changeNameFee = 35 ether;
    uint256 private changeDescFee = 35 ether;
    uint256 private maximumMintAmount = 2562; 
    uint256 private maximumBreedAmount = 5388;
    uint256 private upgradeAmount;
    uint256 private totalMintFee;
    uint256 private mintAmount ; 
    uint256 private breedAmount  ;
    uint256 private maxSupply = 8888;
    uint256 private expPerLevel =10;
    uint256 private minStakeForExp = 86400;
    uint256 private maxLevel = 5;
    uint256 private tOpenWhiteLists = 1637024400; // Tue Nov 16 2021 08:00:00 GMT+0700
    uint256 private tCloseWhiteLists = 1637197200; // Thu Nov 18 2021 08:00:00 GMT+0700
    uint256 private tOpenPublicMint = 1637197200; // Thu Nov 18 2021 08:00:00 GMT+0700
    uint8 private maximunMintPerTransaction =3;
    uint8 private maximumWhiteListsMint = 2; 
    uint16 private maximumNameLength = 20;
    uint16 private maximumDescLength = 300;
    bool private enableStake;
    string private uri = "https://api.machinienft.com/api/humach/unrevealed/";
    
    constructor() ERC721("Humach", "Humach")
    {
        breedFee[0] = 8888 ether;
        breedFee[1] = 170 ether;
        breedFee[2] = 165 ether;
        breedFee[3] = 160 ether;
        breedFee[4] = 155 ether;
        breedFee[5] = 150 ether;

        _worker[machinieNew] = true;
        _admin[0x714FdF665698837f2F31c57A3dB2Dd23a4Efe84c] = true;


    }

    function tokenURI(uint256 tokenId_) public view override returns (string memory) {
        require(_exists(tokenId_), "Humach: URI query for nonexistent token tokenId");
        (uint256 _level, )= calculateLevel(tokenId_);
        require(_level != 0 ,"Humach: abnormal Level" );
        uint256 _imgId = ((_level - 1 ) * maxSupply ) + tokenId_;
        string memory baseURI = _baseURI();
        return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, _imgId.toString())) : "";
    }

    function machinieUpgrade(uint256 tokenId_ ) external returns (uint256) {
        require(IERC721(machinieOld).ownerOf(tokenId_) == _msgSender() , "Humach : owner query for nonexistent machinie token");
        require(IERC721(machinieOld).isApprovedForAll(_msgSender(), address(this)), "Humach : Need approve this address for All");
        IERC721(machinieOld).safeTransferFrom(_msgSender(), blackHole, tokenId_);
        _safeMint(_msgSender(), tokenId_);
        IMachinie(machinieNew).mintMachinie( _msgSender(),tokenId_);
        level[tokenId_] = 1;
        upgradeAmount++;
        return tokenId_;
    }

    function machiniesUpgrade(uint256[] memory tokenIds_ ) external  {
        require(IERC721(machinieOld).isApprovedForAll(_msgSender(), address(this)), "Humach : Need approve this address for All");
        for(uint _i =0; _i< tokenIds_.length; _i++)
        {
            require(IERC721(machinieOld).ownerOf(tokenIds_[_i]) == _msgSender() , "Humach : owner query for nonexistent machinie token");          
            IERC721(machinieOld).safeTransferFrom(_msgSender(), blackHole, tokenIds_[_i]);
            _safeMint(_msgSender(), tokenIds_[_i]);
            IMachinie(machinieNew).mintMachinie( _msgSender(),tokenIds_[_i]);
            level[tokenIds_[_i]] = 1;
            upgradeAmount++;
        }
    }

    function whiteListsMintHumach(uint8 amount_ ) external payable returns (uint256 [] memory){
        require(block.timestamp >= tOpenWhiteLists, "Humach : is not available period");
        require(block.timestamp <= tCloseWhiteLists, "Humach : is not available period");
        require(whiteLists[_msgSender()], "Humach : you are not in whiteLists");
        require(whiteListsMints[_msgSender()] + amount_ <= maximumWhiteListsMint, "Humach : already use whiteLists Mint Humach");
        require(msg.value >= (mintFee * amount_), "Humach : mintFee is not enought");
        require((mintAmount + amount_ ) <=  maximumMintAmount, "Humach : is over maxSupply");

        uint256 [] memory _id = new uint256 [](amount_);
        for(uint8 _i=0; _i< amount_; _i++){
            _id[_i] = tokenId;
            tokenId++;
            _safeMint(_msgSender(), _id[_i]);
            level[_id[_i]] = 1;            
        }
        totalMintFee = totalMintFee + msg.value;
        mintAmount =  mintAmount + amount_;
        whiteListsMints[_msgSender()] = whiteListsMints[_msgSender()] + amount_;
        return _id;
    }

    function publicMintHumach(uint8 amount_) external payable returns (uint256 [] memory){
        require(amount_ <= maximunMintPerTransaction , "Humach : over Maximum min per transaction");
        require(block.timestamp >= tOpenPublicMint, "Humach : is not available period");
        require(msg.value >= (mintFee *amount_) , "Humach : mintFee is not enought");
        require((mintAmount + amount_) <=  maximumMintAmount, "Humach : is over maxSupply");

        uint256 [] memory _id = new uint256 [](amount_);
        for(uint8 _i=0; _i< amount_; _i++){
            _id[_i] = tokenId;
            tokenId++;
            _safeMint(_msgSender(), _id[_i]);
            level[_id[_i]] = 1;
        }
        totalMintFee = totalMintFee + msg.value;
        mintAmount =  mintAmount + amount_;
        return _id;

    }
    
    function giveAway(address account_, uint8 amount_) external  onlyAdmin returns (uint256 [] memory){
        require((mintAmount + amount_)  <=  maximumMintAmount, "Humach :  is over mint capacity");
        uint256 [] memory _id = new uint256 [](amount_);
        for(uint8 _i=0; _i< amount_; _i++){
            _id[_i] = tokenId;
            tokenId++;
            _safeMint(account_, _id[_i]);
            level[_id[_i]] = 1;
        }
        mintAmount =  mintAmount + amount_;
        return _id;
    }

    function breedHumach(uint256 tokenId_) external returns (uint256){
        require(ownerOf(tokenId_) == _msgSender() , "Humach : owner query for nonexistent Humach token");
        require(breedAmount <  maximumBreedAmount, "Humach : is over Breed capacity");
        uint256 _level = level[tokenId_];
        uint256 _fee = breedFee[_level];
        require(_fee !=0 ,"Humach : breedFee Problem" );
        require(IERC20(floppy).balanceOf(_msgSender()) >= _fee, "Humach : balanceOf Floppy is not enought");
        require(IERC20(floppy).allowance(_msgSender(), address(this)) >= _fee, "Humach : allowance Floppy is not enought");

        IERC20(floppy).transferFrom(_msgSender(), blackHole, _fee);
        uint256 _tokenId = tokenId;
        tokenId++;
        _safeMint(_msgSender(), _tokenId);
        level[_tokenId] = 1;
        breedAmount++;

        return(_tokenId);
    } 

    function stakeHumach (uint256 [] memory tokenIds_) external {
        require(enableStake, "Humach : Stake function is disable");
        for(uint8 _i=0; _i< tokenIds_.length; _i++)
        {
            require(ownerOf(tokenIds_[_i]) == _msgSender() , "Humach : owner query for nonexistent Humach token");
            require(!staking[tokenIds_[_i]], "Humach : HumachID is staking");
            stakeTime[tokenIds_[_i]] = block.timestamp;
            staking[tokenIds_[_i]] = true;
        }

    }

    function unStakeHumach (uint256 [] memory tokenIds_) external {
        for(uint8 _i=0; _i< tokenIds_.length; _i++)
        {
            require(ownerOf(tokenIds_[_i]) == _msgSender() , "Humach : You are not owner of this tokenId");
            require(staking[tokenIds_[_i]], "Humach : HumachID is staking");
            require(stakeTime[tokenIds_[_i]] !=0, "Humach: is staking with Machinie" );
        
            (uint256 _level, uint256 _exp) = calculateLevel(tokenIds_[_i]);
            level[tokenIds_[_i]] =_level;
            exp[tokenIds_[_i]] =_exp;
            staking[tokenIds_[_i]] = false;
            stakeTime[tokenIds_[_i]] = 0;
        }


    }

    function calculateLevel(uint256 tokenId_) public view returns(uint256,uint256){
        if(stakeTime[tokenId_] == 0)
            return (level[tokenId_],exp[tokenId_]);
        uint256 _tStake = block.timestamp - stakeTime[tokenId_];
        uint256 _addExp = _tStake / minStakeForExp;
        uint256 _lastExp = (level[tokenId_] * expPerLevel) + exp[tokenId_];
        uint256 _newExp = _lastExp + _addExp;
        uint256 _maxExp = maxLevel * expPerLevel;
        if(_newExp >= _maxExp )
            return (maxLevel,0);
        uint256 _level = _newExp / expPerLevel;
        uint256 _exp = _newExp % expPerLevel;
        return (_level,_exp);
    }

    function updateWhiteLists(address [] memory account_, bool status_) external onlyAdmin{
        for(uint _i =0; _i<account_.length; _i++)
        {
            whiteLists[account_[_i]] = status_;
        }
    }

    function updateTokenName (uint256 tokenId_ ,string memory name_ ) external  {
        require(ownerOf(tokenId_) == _msgSender() , "Humach : owner query for nonexistent Humach token");
        require(IERC20(floppy).balanceOf(_msgSender()) >= changeNameFee, "Humach : BalanceOf Floppy is not enought");
        require(IERC20(floppy).allowance(_msgSender(), address(this)) >= changeNameFee, "Humach : allowance Floppy isnot enought");
        require(bytes(name_).length <= maximumNameLength, "Humach : Name length is over Limit");

        IERC20(floppy).transferFrom(_msgSender(), blackHole, changeNameFee);
        idName[tokenId_] = name_;
        emit changeName(tokenId_ , name_, idDescription[tokenId_]);
    }

    function updateTokenDescription (uint256 tokenId_  ,string memory description_ ) external  {
        require(ownerOf(tokenId_) == _msgSender() , "Humach : owner query for nonexistent Humach token");
        require(IERC20(floppy).balanceOf(_msgSender()) >= changeDescFee, "Humach : BalanceOf Floppy is not enought");
        require(IERC20(floppy).allowance(_msgSender(), address(this)) >= changeDescFee, "Humach : allowance Floppy isnot enought");
        require(bytes(description_).length <= maximumDescLength, "Humach : Description length is over Limit");

        IERC20(floppy).transferFrom(_msgSender(), blackHole, changeDescFee);
        idDescription[tokenId_] = description_;
        emit changeName(tokenId_ , idName[tokenId_], description_);
    }
   
    function burnHumach(uint256 tokenId_) external {
        require(ownerOf(tokenId_) == _msgSender() , "Humach : You are not owner of this tokenId");
        _burn(tokenId_);
    }

    function updateEnableStake(bool status_) external onlyAdmin{
        enableStake = status_;
    }

    function updateStakStatus(uint256 tokenId_,bool status_) external onlyWorker{
        staking[tokenId_] = status_;
    }

    function updateMintFee(uint256 amount_) external onlyAdmin{
        mintFee = amount_;
    }

    function updateBreedFee (uint256 level_ , uint256 fee_) external onlyAdmin{
        breedFee[level_] = fee_ ;
    }

    function updateChangeNameFee(uint256 changeName_,uint256 changeDesc_) external onlyAdmin{
        changeNameFee = changeName_;
        changeDescFee = changeDesc_;
    }

    function updateMintPerTranaction (uint8 amount_ )external onlyAdmin{
        maximunMintPerTransaction = amount_;
    }
    function updateExpParameter (uint256 expPerLevel_ , uint256 minStakeForExp_ ,uint256 maxLevel_ ) external onlyAdmin {
        expPerLevel = expPerLevel_;
        minStakeForExp = minStakeForExp_;
        maxLevel = maxLevel_;
    }

    function updateMaximumMint(uint256 amount_)external onlyAdmin{
        maximumMintAmount = amount_;
    }

    function updateMaximumBreed(uint256 amount_)external onlyAdmin{
        maximumBreedAmount = amount_;
    }

    function updateProjectTime (uint256 openWhiteLists_ ,uint256 closeWhiteLists_,uint256 openPublic_ ) external onlyAdmin {
        tOpenWhiteLists = openWhiteLists_;
        tCloseWhiteLists = closeWhiteLists_;
        tOpenPublicMint = openPublic_;
    }

    function updateLevel(uint256 [] memory tokenId_, uint256  level_) external onlyAdmin{
        for(uint _i =0; _i<tokenId_.length; _i++)
        {
            level[tokenId_[_i]] = level_;
        }
    }
    function updateNameLength (uint16 nameLength_, uint16 descLength_) external onlyAdmin{
        maximumNameLength = nameLength_;
        maximumDescLength = descLength_;
    }

    function updateContractMachinieOld (address newContract) external onlyOwner {
        machinieOld = newContract;
    }

    function updateContractMachinie (address newContract) external onlyOwner {
        machinieNew = newContract;
    }

    function updateContractFloppy (address newContract) external onlyOwner {
        floppy = newContract;
    }

    function updateBaseURI(string memory baseURI_)external onlyOwner{
        uri = baseURI_;
    }

    function withdraw() external payable onlyOwner {
        require(payable(msg.sender).send(address(this).balance));
    }
    
    function withdraw(uint256 amount_) external payable onlyOwner {
        require(payable(msg.sender).send(amount_));
    }   

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

    function isStaking (uint256 tokenId_) external view returns(bool){
        return staking[tokenId_];
    }

    function getStakeTime (uint256 tokenId_) external view returns (uint256){
        return stakeTime[tokenId_];
    }

    function isWhiteLists (address account_) external view returns(bool){
        return whiteLists[account_];
    }

    function getMintFee(uint256 amount_) external view returns(uint256){
        return mintFee*amount_;
    }

    function getBreedHumachFee(uint256 tokenId_) external view  returns (uint256){
        return breedFee[level[tokenId_]];
    }  

    function  getChangeDataFee() external view returns (uint256,uint256){
        return (changeNameFee,changeDescFee);       
    }

    function getUpgradeAmount ()external view returns (uint256){
        return upgradeAmount;
    }
    
    function getTotalMintFee ()external view returns (uint256){
        return totalMintFee;
    }

    function getMintAmount ()external view returns (uint256){
        return mintAmount;
    }

    function getBreedAmount ()external view returns (uint256){
        return breedAmount;
    }

    function getTokenIdName(uint256 tokenId_) external view returns(string memory, string memory){
        return(idName[tokenId_],idDescription[tokenId_]);
    }

    function getEnableStake() external view returns (bool){
        return enableStake;
    }

    function getWhiteListminted(address account_) external view returns(uint8) {
        return whiteListsMints[account_];
    }

    function walletOfOwner(address _owner) external view returns(uint256[] memory) {
        uint256 tokenCount = balanceOf(_owner);
        uint256[] memory tokensId = new uint256[](tokenCount);
        for(uint256 _i; _i < tokenCount; _i++){
            tokensId[_i] = tokenOfOwnerByIndex(_owner, _i);
        }
        return tokensId;
    }

    function getMintPerTranaction ( )external view returns(uint8){
        return maximunMintPerTransaction;
    }

    function getExpParameter () external view returns(uint256,uint256,uint256) {
        return (expPerLevel,minStakeForExp,maxLevel);
    }

    function getNameLength () external view returns(uint16,uint16) {
        return (maximumNameLength,maximumDescLength);
    }

    function getTokenId() external view returns(uint256){
        return tokenId;
    } 

    function getProjectTime () external view returns(uint256,uint256,uint256){
        return(tOpenWhiteLists,tCloseWhiteLists,tOpenPublicMint);
    }

    function getContractMachinieOld() external view returns(address){
        return machinieOld;
    }

    function getContractMachinie() external view returns(address){
        return machinieNew;
    }
    
    function getContractFloppy() external view returns(address){
        return floppy;
    }

    event changeName(uint256 tokenId_ , string  name_, string  description_);
    
    receive() external payable{
        
    }

}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.3.2 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.3.2 (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `sender` to `recipient` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) external returns (bool);

    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.3.2 (token/ERC721/IERC721.sol)

pragma solidity ^0.8.0;

import "./IERC165.sol";

/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721 is IERC165 {
    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
     */
    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
     */
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    /**
     * @dev Returns the number of tokens in ``owner``'s account.
     */
    function balanceOf(address owner) external view returns (uint256 balance);

    /**
     * @dev Returns the owner of the `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function ownerOf(uint256 tokenId) external view returns (address owner);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Transfers `tokenId` token from `from` to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Gives permission to `to` to transfer `tokenId` token to another account.
     * The approval is cleared when the token is transferred.
     *
     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.
     *
     * Requirements:
     *
     * - The caller must own the token or be an approved operator.
     * - `tokenId` must exist.
     *
     * Emits an {Approval} event.
     */
    function approve(address to, uint256 tokenId) external;

    /**
     * @dev Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) external view returns (address operator);

    /**
     * @dev Approve or remove `operator` as an operator for the caller.
     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
     *
     * Requirements:
     *
     * - The `operator` cannot be the caller.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool _approved) external;

    /**
     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
     *
     * See {setApprovalForAll}
     */
    function isApprovedForAll(address owner, address operator) external view returns (bool);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes calldata data
    ) external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.3.2 (token/ERC721/extensions/IERC721Enumerable.sol)

pragma solidity ^0.8.0;

import "./IERC721.sol";

/**
 * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721Enumerable is IERC721 {
    /**
     * @dev Returns the total amount of tokens stored by the contract.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns a token ID owned by `owner` at a given `index` of its token list.
     * Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
     */
    function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId);

    /**
     * @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
     * Use along with {totalSupply} to enumerate all tokens.
     */
    function tokenByIndex(uint256 index) external view returns (uint256);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.3.2 (token/ERC721/extensions/IERC721Metadata.sol)

pragma solidity ^0.8.0;

import "./IERC721.sol";

/**
 * @title ERC-721 Non-Fungible Token Standard, optional metadata extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721Metadata is IERC721 {
    /**
     * @dev Returns the token collection name.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the token collection symbol.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
     */
    function tokenURI(uint256 tokenId) external view returns (string memory);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.3.2 (token/ERC721/IERC721Receiver.sol)

pragma solidity ^0.8.0;

/**
 * @title ERC721 token receiver interface
 * @dev Interface for any contract that wants to support safeTransfers
 * from ERC721 asset contracts.
 */
interface IERC721Receiver {
    /**
     * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
     * by `operator` from `from`, this function is called.
     *
     * It must return its Solidity selector to confirm the token transfer.
     * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
     *
     * The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
     */
    function onERC721Received(
        address operator,
        address from,
        uint256 tokenId,
        bytes calldata data
    ) external returns (bytes4);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./IERC721Enumerable.sol";


interface IMachinie  is IERC721Enumerable{

    function mintMachinie( address to_,uint256 tokenId_) external; 

    function stakeMachinie(uint256[] memory machinieIds_,uint256[] memory hamachIds_) external;  

    function unStakeMachinie(uint256[] memory machinieIds_) external returns(uint256) ; 

    function claimFloppy(uint256[] memory machinieIds_) external returns(uint256) ;

    function getStakeReward(uint256 machinieId_) external view returns(uint256) ;

    function updateTokenName (uint256 tokenId_ ,string memory name_ ) external ;

    function updateTokenDescription (uint256 tokenId_  ,string memory description_ ) external ;

    function burnMachinie(uint256 tokenId_) external;
    
    function updateStakStatus(uint256 tokenId_,bool status_) external ; 

    function updateStakeTime (uint256 tokenId_ ,uint256 stakeTime_) external; 

    function walletOfOwner(address _owner) external view returns(uint256[] memory) ;

    function isLevel (uint256 tokenId_) external view returns(uint256);
    
    function isStaking (uint256 tokenId_) external view returns(bool);
    
    function getStakeTime (uint256 tokenId_) external view returns (uint256);
    
    function getTokenIdName(uint256 tokenId_) external view returns(string memory, string memory);
    
    function getStakeRate(uint256 level_) external view returns(uint256) ;

    function getHumachTokenId(uint256 machinieId_) external view returns(uint256);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.3.2 (access/Ownable.sol)

pragma solidity ^0.8.0;

import "./utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;
    mapping (address => bool) _admin;
    mapping (address => bool) _worker;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
        _admin[_msgSender()] = true;
        _worker[_msgSender()] = true;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }
    function isAdmin(address account_) public view virtual returns (bool) {
        return _admin[account_];
    }
    function isWorker(address account_) public view virtual returns (bool) {
        return _worker[account_];
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    modifier onlyAdmin() {
        require(isAdmin(_msgSender()), "Ownable: caller is not the Admin");
        _;
    }
    modifier onlyWorker() {
        require(isWorker(_msgSender()), "Ownable: caller is not the Worker");
        _;
    }
    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }

    function updateAdmin(address account_, bool status_) public  onlyOwner{
        require(account_ != address(0), "Ownable: new Admin is the zero address");
        _admin[account_] = status_;
    }

    function updateWorker(address account_, bool status_) public  onlyOwner{
        require(account_ != address(0), "Ownable: new Worker is the zero address");
        _worker[account_] = status_;
    }

}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.3.2 (utils/Strings.sol)

pragma solidity ^0.8.0;

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        // Inspired by OraclizeAPI's implementation - MIT licence
        // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol

        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);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    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);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed 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);
    }
}

{
  "compilationTarget": {
    "contracts/Humach.sol": "Humach"
  },
  "evmVersion": "istanbul",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "remappings": []
}