// Verified using https://dapp.tools

// hevm: flattened sources of src/Loaded.sol
// SPDX-License-Identifier: MIT AND GPL-3.0-or-later
pragma solidity >=0.8.0 <0.9.0;

////// lib/openzeppelin-contracts/contracts/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;
    }
}

////// lib/openzeppelin-contracts/contracts/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;

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _setOwner(_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 {
        _setOwner(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");
        _setOwner(newOwner);
    }

    function _setOwner(address newOwner) private {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

////// lib/openzeppelin-contracts/contracts/security/ReentrancyGuard.sol

/* pragma solidity ^0.8.0; */

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        // On the first call to nonReentrant, _notEntered will be true
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;

        _;

        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }
}

////// lib/openzeppelin-contracts/contracts/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);
}

////// lib/openzeppelin-contracts/contracts/token/ERC721/IERC721.sol

/* pragma solidity ^0.8.0; */

/* import "../../utils/introspection/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;
}

////// lib/openzeppelin-contracts/contracts/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);
}

////// lib/openzeppelin-contracts/contracts/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);
}

////// lib/openzeppelin-contracts/contracts/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);
            }
        }
    }
}

////// lib/openzeppelin-contracts/contracts/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);
    }
}

////// lib/openzeppelin-contracts/contracts/utils/introspection/ERC165.sol

/* pragma solidity ^0.8.0; */

/* import "./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;
    }
}

////// lib/openzeppelin-contracts/contracts/token/ERC721/ERC721.sol

/* pragma solidity ^0.8.0; */

/* import "./IERC721.sol"; */
/* import "./IERC721Receiver.sol"; */
/* import "./extensions/IERC721Metadata.sol"; */
/* import "../../utils/Address.sol"; */
/* import "../../utils/Context.sol"; */
/* import "../../utils/Strings.sol"; */
/* import "../../utils/introspection/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 {
        require(operator != _msgSender(), "ERC721: approve to caller");

        _operatorApprovals[_msgSender()][operator] = approved;
        emit ApprovalForAll(_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 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 {}
}

////// src/MetadataUtils.sol
/* pragma solidity ^0.8.0; */

//@notice helper function to convert a  uint to string. Taken from the lootloose repo.
function toString(uint256 value) pure returns (string memory) {
    // Inspired by OraclizeAPI's implementation - MIT license
    // 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);
}

/// [MIT License]
/// @title Base64
/// @notice Provides a function for ncoding some bytes in base64
/// @author Brecht Devos <brecht@loopring.org>
library Base64 {
    bytes internal constant TABLE =
        "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";

    /// @notice Encodes some bytes to the base64 representation
    function encode(bytes memory data) internal pure returns (string memory) {
        uint256 len = data.length;
        if (len == 0) return "";

        // multiply by 4/3 rounded up
        uint256 encodedLen = 4 * ((len + 2) / 3);

        // Add some extra buffer at the end
        bytes memory result = new bytes(encodedLen + 32);

        bytes memory table = TABLE;

        assembly {
            let tablePtr := add(table, 1)
            let resultPtr := add(result, 32)

            for {
                let i := 0
            } lt(i, len) {

            } {
                i := add(i, 3)
                let input := and(mload(add(data, i)), 0xffffff)

                let out := mload(add(tablePtr, and(shr(18, input), 0x3F)))
                out := shl(8, out)
                out := add(
                    out,
                    and(mload(add(tablePtr, and(shr(12, input), 0x3F))), 0xFF)
                )
                out := shl(8, out)
                out := add(
                    out,
                    and(mload(add(tablePtr, and(shr(6, input), 0x3F))), 0xFF)
                )
                out := shl(8, out)
                out := add(
                    out,
                    and(mload(add(tablePtr, and(input, 0x3F))), 0xFF)
                )
                out := shl(224, out)

                mstore(resultPtr, out)

                resultPtr := add(resultPtr, 4)
            }

            switch mod(len, 3)
            case 1 {
                mstore(sub(resultPtr, 2), shl(240, 0x3d3d))
            }
            case 2 {
                mstore(sub(resultPtr, 1), shl(248, 0x3d))
            }

            mstore(result, encodedLen)
        }

        return string(result);
    }
}

////// src/LoadedComponents.sol
/* pragma solidity ^0.8.0; */
/* import {toString} from "./MetadataUtils.sol"; */

/// @title Loadout Components
/// @author Odysseas Lamtzidis
/// @notice Helper contract that stores all the available Loadout weapons and perks.
/// It's also responsible for generating the Loadout kit for every ID. The generated tokens are ERC721 compatible.

contract LoadedComponents {

/// An array of all available weapons, organized by category.
    string[48] internal primaryWeapons= [
        "SIG MCX", //assault rifles, index = 0
        "M4A1",
        "FAMAS",
        "FAL",
        "SCAR",
        "VLK",
        "HK433",
        "TAR-21",
        "SIG SG 552",
        "GALIL",
        "AN-94",
        "AK-47",
        "M16A1,",
        "MP5", //smgs, index = 13
        "MP7",
        "AUG",
        "P90",
        "PP19 BISON",
        "UZI",
        "UMP-45",
        "APC9",
        "AK-74U",
        "870 MCS", // shotguns , index = 22
        "DP12",
        "ORIGIN 12",
        "B725",
        "ORIGIN 12",
        "VLK",
        "AA-12",
        "M249", // light machine guns, index = 29
        "PK",
        "MG 24",
        "SA80",
        "G36",
        "M249 SAW",
        "STONER 96",
        "MK 14", //rifles, index = 36
        "KAR98",
        "MK12 CARBINE",
        "CROSSBOW",
        "SKS",
        "M24",
        "HK G28",
       "BARRETT M82 .50", // sniper rifles, index = 43
        "AX50",
        "DRAGUNOV",
        "M40 RIFLE",
        "L96A1"
    ];
    /// attributes of every weapon, scale of 0 to 10. Attributes are as follows:
    /// [DAMAGE, ACCURACY, RATE OF FIRE]
    uint256[3][48] internal primaryWeaponLevels = [
    [5,7,6], // assault rifles
    [6,7,7],
    [5,8,4],
    [6,8,4],
    [6,7,6],
    [5,7,7],
    [5,6,7],
    [4,8,7],
    [5,7,7],
    [6,7,6],
    [6,6,6],
    [7,4,7],
    [6,7,5],
    [4,7,6], // smgs
    [4,7,6],
    [5,7,5],
    [4,5,8],
    [3,3,8],
    [3,5,7],
    [4,7,6],
    [4,6,7],
    [6,4,7],
    [8,3,2], // shotguns
    [7,4,3],
    [7,4,5],
    [7,3,2],
    [7,4,4],
    [7,4,5],
    [8,7,5],
    [7,5,5],
    [7,6,5],
    [6,7,7],
    [8,7,6],
    [7,6,5],
    [8,5,3], // rifles
    [8,4,2],
    [7,5,4],
    [2,2,4],
    [8,5,4],
    [7,4,4],
    [7,4,4],
    [9,7,4], // sniper rifles
    [8,6,3],
    [8,6,3],
    [8,6,3],
    [8,6,2]
    ];
    // Stats for secondary weapons. Scale 0 to 10.
    // [DAMAGE, ACCURACY, RATE OF FIRE]
   uint256[3][13] internal secondaryWeaponLevels = [
    [2,4,4], // pistols
    [2,3,3],
    [3,3,2],
    [3,2,3],
    [2,3,3],
    [2,3,3],
    [10,1,1], // launchers
    [10,3,1],
    [10,2,1],
    [10,3,1],
    [1,2,0], // melee
    [0,0,0],
    [1,1,0]
   ];

   // unicode characters that are used to create the visual effect of a stats bar
    string[] internal levelBars = [
        unicode" ",
        unicode"█",
        unicode"██",
        unicode"███",
        unicode"████",
        unicode"█████",
        unicode"██████",
        unicode"███████",
        unicode"████████",
        unicode"█████████",
        unicode"██████████"
    ];

    string[] internal secondaryWeapons = [
        "GLOCK 18", // pistols, index = 0
        "M1911",
        ".357 MAGNUM",
        "DESERT EAGLE .50",
        "M17",
        "BERETTA M9",
        "RPG-7", // launchers, index =  6
        "M72 LAW",
        "FGM-148",
        "9K32 STRELA-2",
        "COMBAT KNIFE", //melee, index = 10
        "RIOT SHIELD",
        "KARAMBIT"

    ];

// Equipment is both grenades and tactical equipment
    string[] internal equipment = [
        "CLAYMORE",
        "FRAG GRENADE",
        "C4",
        "SEMTEX",
        "THROWING KNIFE",
        "THROWING AXE",
        "PROXIMITY MINE",
        "THERMITE",
        "FLASH GRENADE",
        "STUN GRENADE",
        "SMOKE GRENADE",
        "HEARTBEAT SENSOR",
        "GAS GRENADE",
        "DECOY GRENADE",
        "TEAR GAS"
    ];

// Perks are loosely defined. Some are skill-based and other role-based. Use your imagination.
    string[] internal perks = [
        "SCAVENGER",
        "GHOST",
        "MEDIC",
        "HARDLINE",
        "OVERKILL",
        "HIGH ALERT",
        "RECON",
        "AMPED",
        "STEADY AIM",
        "TRACKER",
        "SUPPORT",
        "GUNNER",
        "SCOUT",
        "TECHNICIAN",
        "QUICK DRAW",
        "MARKSMAN",
        "DEAD SILENCE",
        "TOUGHNESS",
        "HARD WIRED",
        "RECOVER",
        "LAST STAND",
        "UAV JAMMER",
        "IRON LUNGS",
        "SUPPLIER",
        "ASSASSIN"
    ];
// For every Loaded kit, there is a unique seed that is used to generate the metadata. It's stored in this array.
    uint256[10001] internal loadedSeeds;

// @notice saveSeed generates a seed when a particular Loaded kit is claimed. The seed is stored and used to generate the metadata.
// Seed generation algorithm is inspired by the Hymns project: https://etherscan.io/address/0x83f1d1396b19fed8fbb31ed189579d07362d661d
// @dev Seed is generated based on the time and the block when the function was invoked. It's saved so that metadata for a particular ID stays constant.
    function saveSeed(uint256 loadedId)
        internal
        {
          uint256 seed = uint256(
             keccak256(
                   abi.encodePacked(
                       block.timestamp +
                       block.difficulty +
                       (
                               (uint256(keccak256(abi.encodePacked(block.coinbase))) / (block.timestamp))
                               + block.gaslimit +
                           (
                               (uint256(keccak256(abi.encodePacked(msg.sender)))) /
                               (block.timestamp + block.number)
                            )
                       )

                    )
               )
           );
           loadedSeeds[loadedId] = seed;
        }

//Turns a string into a uint. Not random.
    function random(string memory input)
        internal
        pure
        returns (uint256)
        {
            return uint256(keccak256(abi.encodePacked(input)));
        }
//@notice getPrimaryWeapon returns an index to  pick primary weapon from the primaryWeapon array
    function getPrimaryWeapon(uint256 tokenId)
        internal
        view
        returns (uint256 )
    {
        return pluck(tokenId, "PRIMARY WEAPON" , 48);
    }

///@notice getSecondaryWeapon returns three uints to be used as indexes  to pick items from the secondaryWeapon array
    function getSecondaryWeapon(uint256 tokenId)
        internal
        view
        returns (uint256 )
    {
            return pluck(tokenId, "SECONDARY WEAPON", 13);
    }
///@notice getEquipment returns three uints to be used as indexes  to pick items from the equipment array
    function getEquipment(uint256 tokenId)
        internal
        view
        returns (uint256[3] memory)
    {
            return ([pluck(tokenId, "EQUIPMENT ONE", 15), pluck(tokenId, "EQUIPMENT TWO", 15), pluck(tokenId, "EQUIPMENT THREE", 15)]);
    }
///@notice getPerks returns three uints to be used as indexes to pick items from the perks array
    function getPerks(uint256 tokenId)
        internal
        view
        returns (uint256[3] memory)
    {
            return ([pluck(tokenId, "PERK ONE", 25), pluck(tokenId, "PERK TWO", 25) , pluck(tokenId, "PERK THREE", 25)]);
    }

// @notice pluck is used to choose an item for every category and id
// @param loadID the ID for the ERC721 token
// @param keyPrefix a string to differentiate the output betwen items in different categories for the same ERC721 token ID
// @param sourceArrayLength The length of the category from which the item will be chosen.  The modulo % operator ensures that no out-of-boundaries index will be returned
// @dev the returned value is used as an index for the items category to pick a particular item.
// The function will always output the same component for the same arguments. It's deterministic.
    function pluck(
        uint256 loadId,
        string memory keyPrefix,
        uint256 sourceArrayLength
        )
        internal
        view
        returns (uint256 )
    {
        uint256 seed = loadedSeeds[loadId];
        require(seed != 0, "Invalid ID: Load has not been locked");
        uint256 rand = random(keyPrefix);
        uint256 component = (rand % (seed % 10000)) % sourceArrayLength;
        return component;
    }
}

////// src/LoadedMetadata.sol
/* pragma solidity ^0.8.0; */

/* import "./LoadedComponents.sol"; */
/* import {Base64, toString} from "./MetadataUtils.sol"; */

/// @title Helper contract for generating metadata information about Loadouts.
/// @author Odysseas Lamtzidis
/// @dev Instead of inheriting from ths contract, you can use the public arrays to pull weapons and stats for your contracts.
contract LoadedMetadata is LoadedComponents{
    string tokenName = unicode"Loaded - ︻デ═一 #";
    function buildSVG(uint256 tokenId) internal view returns (string memory) {
        string[] memory parts = new string[](34);
        uint256 index = getPrimaryWeapon(tokenId);
        uint256[3] memory primaryWeaponStats = primaryWeaponLevels[index];
        parts[26] =  primaryWeapons[index];
        index = getSecondaryWeapon(tokenId);
        parts[5] = secondaryWeapons[index];
        uint256[3] memory  secondaryWeaponStats = secondaryWeaponLevels[index];
        uint256[3] memory indexes = getEquipment(tokenId);
        parts[13] = equipment[indexes[0]];
        parts[14] = '</tspan><tspan x="40" y="360">';
        parts[15] = equipment[indexes[1]];
        parts[16] = '</tspan><tspan x="40" y="390">';
        parts[17] = equipment[indexes[2]];
        indexes = getPerks(tokenId);
        parts[0] = '<svg fill="#FFFFFF" font-family="HelveticaNeue-CondensedBold" font-style="condensed" font-weight="bold" width="500px" height="500px" viewBox="0 0 500 500" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">';
        // parts[1] is empty
        parts[2] = '<rect fill="#000000" x="0" y="0" width="500" height="500"></rect><text font-size="24" x="40" y="123">';
        parts[3] = string(abi.encodePacked(tokenName, toString(tokenId)));
        parts[4] = '</text><text font-size="20" x="270" y="197">';
        //parts[5]
        parts[6] = '</text><text font-size="10"  line-spacing="20" letter-spacing="0.416666667" x="270" y="221">DAMAGE<tspan x="326" y="221">';
        parts[7] = levelBars[secondaryWeaponStats[0]];
        parts[8] = '</tspan><tspan x="426" y="221" ></tspan><tspan x="270" y="241">ACCURACY</tspan><tspan x="316.703333" y="241" ></tspan><tspan x="326" y="241" >';
        parts[9] = levelBars[secondaryWeaponStats[1]];
        parts[10] = '</tspan><tspan x="270" y="261">FIRE RATE</tspan><tspan x="326" y="261" >';
        parts[11] = levelBars[secondaryWeaponStats[2]];
        parts[12] = '</tspan></text><text font-size="20" line-spacing="30"><tspan x="40" y="330">';
        // parts[13]
        // parts[14]
        // parts[15]
        // parts[16]
        // parts[17]
        parts[18] = '</tspan></text><text font-size="20" line-spacing="30"><tspan x="270" y="330">';
        parts[19] = perks[indexes[0]];
        parts[20] = '</tspan><tspan x="270" y="360">';
        parts[21] = perks[indexes[1]];
        parts[22] = '</tspan><tspan x="270" y="390">';
        parts[23] = perks[indexes[2]];
        parts[24] = '</tspan></text><text font-size="20" x="40" y="197">';
        // parts[26]
        parts[27] = '</text><text font-size="10" line-spacing="20" letter-spacing="0.416666667"><tspan x="40" y="221">DAMAGE</tspan><tspan x="96" y="221">';
        parts[28] = levelBars[primaryWeaponStats[0]];
        parts[29] = '</tspan><tspan x="40" y="241">ACCURACY</tspan><tspan x="96" y="241">';
        parts[30] = levelBars[primaryWeaponStats[1]];
        parts[31] = '</tspan><tspan x="40" y="261">FIRE RATE</tspan><tspan x="96" y="261">';
        parts[32] = levelBars[primaryWeaponStats[2]];
        parts[33] = '</tspan></text></svg>';
        bytes memory output5 = abi.encodePacked(abi.encodePacked(parts[0], parts[2], parts[3], parts[4], parts[5], parts[6], parts[7] ,parts[8], parts[9]),
                                                abi.encodePacked(parts[10], parts[11], parts[12], parts[13], parts[14], parts[15], parts[16], parts[17], parts[18]),
                                                abi.encodePacked(parts[19], parts[20], parts[21], parts[22], parts[23], parts[24], parts[25], parts[26]),
                                                abi.encodePacked(parts[27], parts[28], parts[29], parts[30], parts[31], parts[32], parts[33]));
        return string(output5);
    }
 }


////// src/Loaded.sol
/* pragma solidity ^0.8.0; */

// ============ Imports ============

/* import "@openzeppelin/contracts/token/ERC721/ERC721.sol"; */
/* import "@openzeppelin/contracts/access/Ownable.sol"; */
/* import "@openzeppelin/contracts/security/ReentrancyGuard.sol"; */

/* import "./LoadedMetadata.sol"; */

/// @title Loadout
/// @author Odysseas Lamtzidis
/// @notice A loot-inspired NFT project in the era of modern combat. Every Loudout is pseudo-randomly generated.
/// @notice We add a se
/// @dev Project structure is based on lootloose by Georgios Konstantopoulos: https://github.com/gakonst/lootloose

contract Loaded is ERC721, LoadedMetadata, Ownable, ReentrancyGuard{

    constructor() ERC721("Loaded", "LOADED") Ownable() {}
/// @notice Claims a new load that is not claimed and it's ID is between the boundaries.
/// It's the first wave of claimable Loads. The ID is passed to a pseudo-random generator to create and store the seed.
    function locknload(uint256 loadId) public nonReentrant {
        require(loadId > 0 && loadId < 4242, "Ser, Loaded has been already locked or you entered an invalid ID");
        saveSeed(loadId);
        _safeMint(_msgSender(), loadId);
    }
/// @notice Claims a new load that has not been claimed. The function can be ran only after a certain timestamp,
/// giving the chance to everyone to participate.
    function locknloadWave2(uint256 loadId) public nonReentrant {
        require(loadId > 4243 && loadId < 8888, "Ser, Loaded has been already locked or you entered an invalid ID");
        require(block.timestamp > 1631976975, "ETA is unknown");
        saveSeed(loadId);
        _safeMint(_msgSender(), loadId);
    }
/// @notice Same claim function as before, reserved for the creators of the project.
    function commanderLocknload(uint256 loadId) public nonReentrant onlyOwner {
        require(loadId > 9222 && loadId < 10001, "Ser, Loaded has been already locked or you are not the Commander");
        saveSeed(loadId);
        _safeMint(owner(), loadId);
    }
/// @notice Same claim function as before, reserved for the creators of the project.
    function ministerOfDefenseLocknload(uint256 loadId) public nonReentrant {
        require(loadId >  8887 && loadId < 9223 && msg.sender == address(0x4783CaA6645B566465978b5d19Cd55329AE6e964), "Ser, Loaded has been already locked or you are not the Minister");
        saveSeed(loadId);
        _safeMint(msg.sender, loadId);
    }
/// @notice It returns the Base64 encoded json according to the ERC721 spec. The svg image is generated inside the contract.
    function tokenURI(uint256 loadId) override public view returns (string memory)
        {
            string memory output = buildSVG(loadId);
            string memory json = Base64.encode(
                bytes(
                    string(
                        abi.encodePacked(
                            '{ "name": "', string(abi.encodePacked(tokenName, toString(loadId))),'", ',
                            '"description" : ', '"Loaded is randomized gear for soldiers, generated and stored on chain. The weapon stats are open and available on chain.",',
                            '"image": "data:image/svg+xml;base64,', Base64.encode(bytes(output)), '"'
                            '}'
                        )
                    )
                )
            );
            output = string(abi.encodePacked("data:application/json;base64,", json)
            );
        return output;
        }
}