// SPDX-License-Identifier: MIT
// Donkeverse Contracts v0.0.1
// File: @openzeppelin/contracts/utils/Strings.sol


// OpenZeppelin Contracts v4.4.1 (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);
    }
}

// File: @openzeppelin/contracts/utils/Context.sol


// OpenZeppelin Contracts v4.4.1 (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;
    }
}

// File: @openzeppelin/contracts/access/Ownable.sol


// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)

pragma solidity ^0.8.0;


/**
 * @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;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @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);
    }
}

// File: @openzeppelin/contracts/utils/Address.sol


// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @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
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 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);
            }
        }
    }
}

// File: @openzeppelin/contracts/utils/introspection/IERC165.sol


// OpenZeppelin Contracts v4.4.1 (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);
}

// File: @openzeppelin/contracts/utils/introspection/ERC165.sol


// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)

pragma solidity ^0.8.0;


/**
 * @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;
    }
}

// File: @openzeppelin/contracts/token/ERC1155/IERC1155Receiver.sol


// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC1155/IERC1155Receiver.sol)

pragma solidity ^0.8.0;


/**
 * @dev _Available since v3.1._
 */
interface IERC1155Receiver is IERC165 {
    /**
     * @dev Handles the receipt of a single ERC1155 token type. This function is
     * called at the end of a `safeTransferFrom` after the balance has been updated.
     *
     * NOTE: To accept the transfer, this must return
     * `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`
     * (i.e. 0xf23a6e61, or its own function selector).
     *
     * @param operator The address which initiated the transfer (i.e. msg.sender)
     * @param from The address which previously owned the token
     * @param id The ID of the token being transferred
     * @param value The amount of tokens being transferred
     * @param data Additional data with no specified format
     * @return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))` if transfer is allowed
     */
    function onERC1155Received(
        address operator,
        address from,
        uint256 id,
        uint256 value,
        bytes calldata data
    ) external returns (bytes4);

    /**
     * @dev Handles the receipt of a multiple ERC1155 token types. This function
     * is called at the end of a `safeBatchTransferFrom` after the balances have
     * been updated.
     *
     * NOTE: To accept the transfer(s), this must return
     * `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))`
     * (i.e. 0xbc197c81, or its own function selector).
     *
     * @param operator The address which initiated the batch transfer (i.e. msg.sender)
     * @param from The address which previously owned the token
     * @param ids An array containing ids of each token being transferred (order and length must match values array)
     * @param values An array containing amounts of each token being transferred (order and length must match ids array)
     * @param data Additional data with no specified format
     * @return `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))` if transfer is allowed
     */
    function onERC1155BatchReceived(
        address operator,
        address from,
        uint256[] calldata ids,
        uint256[] calldata values,
        bytes calldata data
    ) external returns (bytes4);
}

// File: @openzeppelin/contracts/token/ERC1155/IERC1155.sol


// OpenZeppelin Contracts v4.4.1 (token/ERC1155/IERC1155.sol)

pragma solidity ^0.8.0;


/**
 * @dev Required interface of an ERC1155 compliant contract, as defined in the
 * https://eips.ethereum.org/EIPS/eip-1155[EIP].
 *
 * _Available since v3.1._
 */
interface IERC1155 is IERC165 {
    /**
     * @dev Emitted when `value` tokens of token type `id` are transferred from `from` to `to` by `operator`.
     */
    event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value);

    /**
     * @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all
     * transfers.
     */
    event TransferBatch(
        address indexed operator,
        address indexed from,
        address indexed to,
        uint256[] ids,
        uint256[] values
    );

    /**
     * @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to
     * `approved`.
     */
    event ApprovalForAll(address indexed account, address indexed operator, bool approved);

    /**
     * @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI.
     *
     * If an {URI} event was emitted for `id`, the standard
     * https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value
     * returned by {IERC1155MetadataURI-uri}.
     */
    event URI(string value, uint256 indexed id);

    /**
     * @dev Returns the amount of tokens of token type `id` owned by `account`.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function balanceOf(address account, uint256 id) external view returns (uint256);

    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}.
     *
     * Requirements:
     *
     * - `accounts` and `ids` must have the same length.
     */
    function balanceOfBatch(address[] calldata accounts, uint256[] calldata ids)
        external
        view
        returns (uint256[] memory);

    /**
     * @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`,
     *
     * Emits an {ApprovalForAll} event.
     *
     * Requirements:
     *
     * - `operator` cannot be the caller.
     */
    function setApprovalForAll(address operator, bool approved) external;

    /**
     * @dev Returns true if `operator` is approved to transfer ``account``'s tokens.
     *
     * See {setApprovalForAll}.
     */
    function isApprovedForAll(address account, address operator) external view returns (bool);

    /**
     * @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
     *
     * Emits a {TransferSingle} event.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - If the caller is not `from`, it must be have been approved to spend ``from``'s tokens via {setApprovalForAll}.
     * - `from` must have a balance of tokens of type `id` of at least `amount`.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
     * acceptance magic value.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 id,
        uint256 amount,
        bytes calldata data
    ) external;

    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}.
     *
     * Emits a {TransferBatch} event.
     *
     * Requirements:
     *
     * - `ids` and `amounts` must have the same length.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
     * acceptance magic value.
     */
    function safeBatchTransferFrom(
        address from,
        address to,
        uint256[] calldata ids,
        uint256[] calldata amounts,
        bytes calldata data
    ) external;
}

// File: @openzeppelin/contracts/token/ERC1155/extensions/IERC1155MetadataURI.sol


// OpenZeppelin Contracts v4.4.1 (token/ERC1155/extensions/IERC1155MetadataURI.sol)

pragma solidity ^0.8.0;


/**
 * @dev Interface of the optional ERC1155MetadataExtension interface, as defined
 * in the https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[EIP].
 *
 * _Available since v3.1._
 */
interface IERC1155MetadataURI is IERC1155 {
    /**
     * @dev Returns the URI for token type `id`.
     *
     * If the `\{id\}` substring is present in the URI, it must be replaced by
     * clients with the actual token type ID.
     */
    function uri(uint256 id) external view returns (string memory);
}

// File: contracts/abc.sol



// Donkeverse Contracts v0.0.1



pragma solidity ^0.8.0;









/**

 * @dev Implementation of the basic standard multi-token.

 * See https://eips.ethereum.org/EIPS/eip-1155

 * Originally based on code by Enjin: https://github.com/enjin/erc-1155

 *

 * _Available since v3.1._

 */

contract ERC1155 is Context, ERC165, IERC1155, IERC1155MetadataURI,Ownable {

    using Address for address;



    uint256 public constant MAX_SUPPLY = 8888;



    address[MAX_SUPPLY] internal _owners;



    // Mapping from account to operator approvals

    mapping(address => mapping(address => bool)) private _operatorApprovals;



    // Used as the URI for all token types by relying on ID substitution, e.g. https://token-cdn-domain/{id}.json

    string private _uri;



    bool locked; 

    string public name;

    // Contract symbol

    string public symbol;



    /**

     * @dev See {_setURI}. 

     */

      constructor(string memory _name,string memory _symbol,string memory uri_){

        name=_name;

        symbol=_symbol; 

        _uri= uri_;

    }

 

    /**

     * @dev See {IERC165-supportsInterface}.

     */

    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {

        return

            interfaceId == type(IERC1155).interfaceId ||

            interfaceId == type(IERC1155MetadataURI).interfaceId ||

            super.supportsInterface(interfaceId);

    }



    function uri(uint256 _tokenId) public view virtual override returns (string memory) {

        return string(

          abi.encodePacked(

            _uri,

            Strings.toString(_tokenId)

          )

        );

    }



     function setURI(string memory uri_) public onlyOwner {

         _setURI(uri_);

    } 





    function airdrop(address[] calldata addresses, uint256 id)external onlyOwner{

        

        for(uint i;i<addresses.length;i++){

        

        _mint(addresses[i], id, 1, ""); 



        } 

    }



    function setlock(bool enter)public onlyOwner{

       locked =enter;

    }

    



    function checkiflocked()public view returns(bool){

       return locked; 

    }

     



    function transfer(address from,address to, uint256 amount,uint256 id)public{

           safeTransferFrom(from,to,id,amount,"");

    

     }





    function balanceOf(address account, uint256 id) public view virtual override returns (uint256) {

        require(account != address(0), "ERC1155: balance query for the zero address");

        require(id < MAX_SUPPLY, "ERC1155D: id exceeds maximum");



        return _owners[id] == account ? 1 : 0;

    }



    /**

     * @dev See {IERC1155-balanceOfBatch}.

     *

     * Requirements:

     *

     * - `accounts` and `ids` must have the same length.

     */

    function balanceOfBatch(address[] memory accounts, uint256[] memory ids)

        public

        view

        virtual

        override

        returns (uint256[] memory)

    {

        require(accounts.length == ids.length, "ERC1155: accounts and ids length mismatch");



        uint256[] memory batchBalances = new uint256[](accounts.length);



        for (uint256 i = 0; i < accounts.length; ++i) {

            batchBalances[i] = balanceOf(accounts[i], ids[i]);

        }



        return batchBalances;

    }



    /**

     * @dev See {IERC1155-setApprovalForAll}.

     */

    function setApprovalForAll(address operator, bool approved) public virtual override {

        _setApprovalForAll(_msgSender(), operator, approved);

    }



    /**

     * @dev See {IERC1155-isApprovedForAll}.

     */

    function isApprovedForAll(address account, address operator) public view virtual override returns (bool) {

        return _operatorApprovals[account][operator];

    }



    /**

     * @dev See {IERC1155-safeTransferFrom}.

     */

    function safeTransferFrom(

        address from,

        address to,

        uint256 id,

        uint256 amount,

        bytes memory data

    ) public virtual override {

        require(

            from == _msgSender() || isApprovedForAll(from, _msgSender()),

            "ERC1155: caller is not owner nor approved"

        );

        _safeTransferFrom(from, to, id, amount, data);

    }



    /**

     * @dev See {IERC1155-safeBatchTransferFrom}.

     */

    function safeBatchTransferFrom(

        address from,

        address to,

        uint256[] memory ids,

        uint256[] memory amounts,

        bytes memory data

    ) public virtual override {

        require(

            from == _msgSender() || isApprovedForAll(from, _msgSender()),

            "ERC1155: transfer caller is not owner nor approved"

        );

        _safeBatchTransferFrom(from, to, ids, amounts, data);

    }



    /**

     * @dev Transfers `amount` tokens of token type `id` from `from` to `to`.

     *

     * Emits a {TransferSingle} event.

     *

     * Requirements:

     *

     * - `to` cannot be the zero address.

     * - `from` must have a balance of tokens of type `id` of at least `amount`.

     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the

     * acceptance magic value.

     */

    function _safeTransferFrom(

        address from,

        address to,

        uint256 id,

        uint256 amount,

        bytes memory data

    ) internal virtual {

        require(to != address(0), "ERC1155: transfer to the zero address");

        require(locked==false, "cant transfer currently locked");

        address operator = _msgSender();

        uint256[] memory ids = _asSingletonArray(id);

        uint256[] memory amounts = _asSingletonArray(amount);

         



        _beforeTokenTransfer(operator, from, to, ids, amounts, data);



        require(_owners[id] == from && amount < 2, "ERC1155: insufficient balance for transfer");



        // The ERC1155 spec allows for transfering zero tokens, but we are still expected

        // to run the other checks and emit the event. But we don't want an ownership change

        // in that case

        if (amount == 1) {

            _owners[id] = to;

        }



        emit TransferSingle(operator, from, to, id, amount);



        _afterTokenTransfer(operator, from, to, ids, amounts, data);



        _doSafeTransferAcceptanceCheck(operator, from, to, id, amount, data);

    }



    /**

     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_safeTransferFrom}.

     *

     * Emits a {TransferBatch} event.

     *

     * Requirements:

     *

     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the

     * acceptance magic value.

     */

    function _safeBatchTransferFrom(

        address from,

        address to,

        uint256[] memory ids,

        uint256[] memory amounts,

        bytes memory data

    ) internal virtual {

        require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");

        require(to != address(0), "ERC1155: transfer to the zero address");

        require(locked==false, "cant transfer currently locked");



        address operator = _msgSender();



        _beforeTokenTransfer(operator, from, to, ids, amounts, data);



        for (uint256 i = 0; i < ids.length; ++i) {

            uint256 id = ids[i];



            require(_owners[id] == from && amounts[i] < 2, "ERC1155: insufficient balance for transfer");



            if (amounts[i] == 1) {

                _owners[id] = to;

            }

        }



        emit TransferBatch(operator, from, to, ids, amounts);



        _afterTokenTransfer(operator, from, to, ids, amounts, data);



        _doSafeBatchTransferAcceptanceCheck(operator, from, to, ids, amounts, data);

    }



    /**

     * @dev Sets a new URI for all token types, by relying on the token type ID

     * substitution mechanism

     * https://eips.ethereum.org/EIPS/eip-1155#metadata[defined in the EIP].

     *

     * By this mechanism, any occurrence of the `\{id\}` substring in either the

     * URI or any of the amounts in the JSON file at said URI will be replaced by

     * clients with the token type ID.

     *

     * For example, the `https://token-cdn-domain/\{id\}.json` URI would be

     * interpreted by clients as

     * `https://token-cdn-domain/000000000000000000000000000000000000000000000000000000000004cce0.json`

     * for token type ID 0x4cce0.

     *

     * See {uri}.

     *

     * Because these URIs cannot be meaningfully represented by the {URI} event,

     * this function emits no events.

     */

    function _setURI(string memory newuri) internal virtual {

        _uri = newuri;

    }



    /**

     * @dev Creates `amount` tokens of token type `id`, and assigns them to `to`.

     *

     * Emits a {TransferSingle} event.

     *

     * Requirements:

     *

     * - `to` cannot be the zero address.

     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the

     * acceptance magic value.

     */







    function _mint(

        address to,

        uint256 id,

        uint256 amount,

        bytes memory data

    ) internal virtual {

        require(to != address(0), "ERC1155: mint to the zero address");

        // require(amount < 2, "ERC1155D: exceeds supply");

        // require(id < MAX_SUPPLY, "ERC1155D: invalid id");



        address operator = _msgSender();

        uint256[] memory ids = _asSingletonArray(id);

        uint256[] memory amounts = _asSingletonArray(amount);



        _beforeTokenTransfer(operator, address(0), to, ids, amounts, data);



        // The ERC1155 spec allows for transfering zero tokens, but we are still expected

        // to run the other checks and emit the event. But we don't want an ownership change

        // in that case

        if (amount == 1) {

            _owners[id] = to;

        }



        emit TransferSingle(operator, address(0), to, id, amount);



        _afterTokenTransfer(operator, address(0), to, ids, amounts, data);



        _doSafeTransferAcceptanceCheck(operator, address(0), to, id, amount, data);

    }



    /**

     * @dev Creates `amount` tokens of token type `id`, and assigns them to `to`.

     *

     * Emits a {TransferSingle} event.

     *

     * Requirements:

     *

     * - `to` cannot be the zero address.

     * - `id` must be less than MAX_SUPPLY;

     * This does not implement smart contract checks according to ERC1155 so it exists as a separate function

     */



    function _mintSingle(address to, uint256 id) internal virtual {

        require(to != address(0), "ERC1155: mint to the zero address"); // you can remove this if only minting to msg.sender

        require(_owners[id] == address(0), "ERC1155D: supply exceeded");

        require(id < MAX_SUPPLY, "ERC1155D: invalid id"); // you can remove this if the check is done outside



        _owners[id] = to; // this can be made more efficient with assembly if you know what you are doing!

        emit TransferSingle(to, address(0), to, id, 1);

    }



    /**

     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_mint}.

     *

     * Requirements:

     *

     * - `ids` and `amounts` must have the same length.

     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the

     * acceptance magic value.

     */

    function _mintBatch(

        address to,

        uint256[] memory ids,

        uint256[] memory amounts,

        bytes memory data

    ) internal virtual {

        require(to != address(0), "ERC1155: mint to the zero address");

        require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");



        address operator = _msgSender();



        _beforeTokenTransfer(operator, address(0), to, ids, amounts, data);



        for (uint256 i = 0; i < ids.length; i++) {

            require(amounts[i] < 2, "ERC1155D: exceeds supply");

            require(_owners[ids[i]] == address(0), "ERC1155D: supply exceeded");



            if (amounts[i] == 1) {

                _owners[ids[i]] = to;

            }

        }



        emit TransferBatch(operator, address(0), to, ids, amounts);



        _afterTokenTransfer(operator, address(0), to, ids, amounts, data);



        _doSafeBatchTransferAcceptanceCheck(operator, address(0), to, ids, amounts, data);

    }



    /**

     * @dev Destroys `amount` tokens of token type `id` from `from`

     *

     * Requirements:

     *

     * - `from` cannot be the zero address.

     * - `from` must have at least `amount` tokens of token type `id`.

     */

    function _burn(

        address from,

        uint256 id,

        uint256 amount

    ) internal virtual {

        require(from != address(0), "ERC1155: burn from the zero address");



        address operator = _msgSender();

        uint256[] memory ids = _asSingletonArray(id);

        uint256[] memory amounts = _asSingletonArray(amount);



        _beforeTokenTransfer(operator, from, address(0), ids, amounts, "");



        require(_owners[id] == from && amount < 2, "ERC1155: burn amount exceeds balance");

        if (amount == 1) {

            _owners[id] = address(0);

        }



        emit TransferSingle(operator, from, address(0), id, amount);



        _afterTokenTransfer(operator, from, address(0), ids, amounts, "");

    }



    /**

     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_burn}.

     *

     * Requirements:

     *

     * - `ids` and `amounts` must have the same length.

     */

    function _burnBatch(

        address from,

        uint256[] memory ids,

        uint256[] memory amounts

    ) internal virtual {

        require(from != address(0), "ERC1155: burn from the zero address");

        require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");



        address operator = _msgSender();



        _beforeTokenTransfer(operator, from, address(0), ids, amounts, "");



        for (uint256 i = 0; i < ids.length; i++) {

            uint256 id = ids[i];

            require(_owners[id] == from && amounts[i] < 2, "ERC1155: burn amount exceeds balance");

            if (amounts[i] == 1) {

                _owners[id] = address(0);

            }

        }



        emit TransferBatch(operator, from, address(0), ids, amounts);



        _afterTokenTransfer(operator, from, address(0), ids, amounts, "");

    }



    /**

     * @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, "ERC1155: setting approval status for self");

        _operatorApprovals[owner][operator] = approved;

        emit ApprovalForAll(owner, operator, approved);

    }



    /**

     * @dev Hook that is called before any token transfer. This includes minting

     * and burning, as well as batched variants.

     *

     * The same hook is called on both single and batched variants. For single

     * transfers, the length of the `id` and `amount` arrays will be 1.

     *

     * Calling conditions (for each `id` and `amount` pair):

     *

     * - When `from` and `to` are both non-zero, `amount` of ``from``'s tokens

     * of token type `id` will be  transferred to `to`.

     * - When `from` is zero, `amount` tokens of token type `id` will be minted

     * for `to`.

     * - when `to` is zero, `amount` of ``from``'s tokens of token type `id`

     * will be burned.

     * - `from` and `to` are never both zero.

     * - `ids` and `amounts` have the same, non-zero length.

     *

     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].

     */

    function _beforeTokenTransfer(

        address operator,

        address from,

        address to,

        uint256[] memory ids,

        uint256[] memory amounts,

        bytes memory data

    ) internal virtual {}



    /**

     * @dev Hook that is called after any token transfer. This includes minting

     * and burning, as well as batched variants.

     *

     * The same hook is called on both single and batched variants. For single

     * transfers, the length of the `id` and `amount` arrays will be 1.

     *

     * Calling conditions (for each `id` and `amount` pair):

     *

     * - When `from` and `to` are both non-zero, `amount` of ``from``'s tokens

     * of token type `id` will be  transferred to `to`.

     * - When `from` is zero, `amount` tokens of token type `id` will be minted

     * for `to`.

     * - when `to` is zero, `amount` of ``from``'s tokens of token type `id`

     * will be burned.

     * - `from` and `to` are never both zero.

     * - `ids` and `amounts` have the same, non-zero length.

     *

     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].

     */

    function _afterTokenTransfer(

        address operator,

        address from,

        address to,

        uint256[] memory ids,

        uint256[] memory amounts,

        bytes memory data

    ) internal virtual {}



    function _doSafeTransferAcceptanceCheck(

        address operator,

        address from,

        address to,

        uint256 id,

        uint256 amount,

        bytes memory data

    ) private {

        if (to.isContract()) {

            try IERC1155Receiver(to).onERC1155Received(operator, from, id, amount, data) returns (bytes4 response) {

                if (response != IERC1155Receiver.onERC1155Received.selector) {

                    revert("ERC1155: ERC1155Receiver rejected tokens");

                }

            } catch Error(string memory reason) {

                revert(reason);

            } catch {

                revert("ERC1155: transfer to non ERC1155Receiver implementer");

            }

        }

    }



    function _doSafeBatchTransferAcceptanceCheck(

        address operator,

        address from,

        address to,

        uint256[] memory ids,

        uint256[] memory amounts,

        bytes memory data

    ) private {

        if (to.isContract()) {

            try IERC1155Receiver(to).onERC1155BatchReceived(operator, from, ids, amounts, data) returns (

                bytes4 response

            ) {

                if (response != IERC1155Receiver.onERC1155BatchReceived.selector) {

                    revert("ERC1155: ERC1155Receiver rejected tokens");

                }

            } catch Error(string memory reason) {

                revert(reason);

            } catch {

                revert("ERC1155: transfer to non ERC1155Receiver implementer");

            }

        }

    }



    function _asSingletonArray(uint256 element) internal pure returns (uint256[] memory) {

        uint256[] memory array = new uint256[](1);

        array[0] = element;



        return array;

    }



    function _prepayGas(uint256 start, uint256 end) internal {

        require(end <= MAX_SUPPLY, "ERC1155D: end id exceeds maximum");



        for (uint256 i = start; i < end; i++) {



            bytes32 slotValue;

            assembly {

                slotValue := sload(add(_owners.slot, i))

            }



            bytes32 leftmostBitSetToOne = slotValue | bytes32(uint256(1) << 255);

            assembly {

                sstore(add(_owners.slot, i), leftmostBitSetToOne)

            }

        }

    }



    function getOwnershipRecordOffChain() external view returns(address[MAX_SUPPLY] memory) {

        return _owners;

    }



    function ownerOfERC721Like(uint256 id) external view returns(address) {

        require(id < _owners.length, "ERC1155D: id exceeds maximum");

        address owner = _owners[id];

        require(owner != address(0), "ERC1155D: owner query for nonexistent token");

        return owner;

    }



    function getERC721BalanceOffChain(address _address) external view returns(uint256) {

        uint256 counter = 0;

        for (uint256 i; i < _owners.length; i++) {

            if (_owners[i] == _address) {

                counter++;

            }

        }

        return counter;

    }

}