Token Hedgeys

/**
 *Submitted for verification at Etherscan.io on 2022-08-07
*/

// File: contracts/interfaces/IWETH.sol

pragma solidity ^0.8.13;

/// @dev used for handling ETH wrapping into WETH to be stored in smart contracts upon deposit,
/// ... and used to unwrap WETH into ETH to deliver when withdrawing from smart contracts
interface IWETH {
  function deposit() external payable;

  function transfer(address to, uint256 value) external returns (bool);

  function withdraw(uint256) external;
}

// File: @openzeppelin/contracts/security/ReentrancyGuard.sol


// OpenZeppelin Contracts v4.4.1 (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;
    }
}

// File: @openzeppelin/contracts/utils/Counters.sol


// OpenZeppelin Contracts v4.4.1 (utils/Counters.sol)

pragma solidity ^0.8.0;

/**
 * @title Counters
 * @author Matt Condon (@shrugs)
 * @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number
 * of elements in a mapping, issuing ERC721 ids, or counting request ids.
 *
 * Include with `using Counters for Counters.Counter;`
 */
library Counters {
    struct Counter {
        // This variable should never be directly accessed by users of the library: interactions must be restricted to
        // the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
        // this feature: see https://github.com/ethereum/solidity/issues/4637
        uint256 _value; // default: 0
    }

    function current(Counter storage counter) internal view returns (uint256) {
        return counter._value;
    }

    function increment(Counter storage counter) internal {
        unchecked {
            counter._value += 1;
        }
    }

    function decrement(Counter storage counter) internal {
        uint256 value = counter._value;
        require(value > 0, "Counter: decrement overflow");
        unchecked {
            counter._value = value - 1;
        }
    }

    function reset(Counter storage counter) internal {
        counter._value = 0;
    }
}

// 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/token/ERC721/IERC721Receiver.sol


// OpenZeppelin Contracts v4.4.1 (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);
}

// 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/ERC721/IERC721.sol


// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)

pragma solidity ^0.8.0;


/**
 * @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;
}

// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol


// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/extensions/IERC721Enumerable.sol)

pragma solidity ^0.8.0;


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

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

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

// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol


// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)

pragma solidity ^0.8.0;


/**
 * @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);
}

// 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/token/ERC721/ERC721.sol


// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/ERC721.sol)

pragma solidity ^0.8.0;








/**
 * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
 * the Metadata extension, but not including the Enumerable extension, which is available separately as
 * {ERC721Enumerable}.
 */
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
    using Address for address;
    using Strings for uint256;

    // Token name
    string private _name;

    // Token symbol
    string private _symbol;

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

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

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

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

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

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

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

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

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

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

    /**
     * @dev See {IERC721Metadata-tokenURI}.
     */
    function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
        require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");

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

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

    /**
     * @dev See {IERC721-approve}.
     */
    function approve(address to, uint256 tokenId) public virtual override {
        address owner = ERC721.ownerOf(tokenId);
        require(to != owner, "ERC721: approval to current owner");

        require(
            _msgSender() == owner || isApprovedForAll(owner, _msgSender()),
            "ERC721: approve caller is not owner nor approved for all"
        );

        _approve(to, tokenId);
    }

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

        return _tokenApprovals[tokenId];
    }

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

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

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

        _transfer(from, to, tokenId);
    }

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

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

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
     *
     * `_data` is additional data, it has no specified format and it is sent in call to `to`.
     *
     * This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
     * implement alternative mechanisms to perform token transfer, such as signature-based.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function _safeTransfer(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) internal virtual {
        _transfer(from, to, tokenId);
        require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
    }

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

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

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

    /**
     * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
     * forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
     */
    function _safeMint(
        address to,
        uint256 tokenId,
        bytes memory _data
    ) internal virtual {
        _mint(to, tokenId);
        require(
            _checkOnERC721Received(address(0), to, tokenId, _data),
            "ERC721: transfer to non ERC721Receiver implementer"
        );
    }

    /**
     * @dev Mints `tokenId` and transfers it to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
     *
     * Requirements:
     *
     * - `tokenId` must not exist.
     * - `to` cannot be the zero address.
     *
     * Emits a {Transfer} event.
     */
    function _mint(address to, uint256 tokenId) internal virtual {
        require(to != address(0), "ERC721: mint to the zero address");
        require(!_exists(tokenId), "ERC721: token already minted");

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

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

        emit Transfer(address(0), to, tokenId);

        _afterTokenTransfer(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);

        _afterTokenTransfer(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 from incorrect owner");
        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);

        _afterTokenTransfer(from, to, tokenId);
    }

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

    /**
     * @dev Approve `operator` to operate on all of `owner` tokens
     *
     * Emits a {ApprovalForAll} event.
     */
    function _setApprovalForAll(
        address owner,
        address operator,
        bool approved
    ) internal virtual {
        require(owner != operator, "ERC721: approve to caller");
        _operatorApprovals[owner][operator] = approved;
        emit ApprovalForAll(owner, operator, approved);
    }

    /**
     * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
     * The call is not executed if the target address is not a contract.
     *
     * @param from address representing the previous owner of the given token ID
     * @param to target address that will receive the tokens
     * @param tokenId uint256 ID of the token to be transferred
     * @param _data bytes optional data to send along with the call
     * @return bool whether the call correctly returned the expected magic value
     */
    function _checkOnERC721Received(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) private returns (bool) {
        if (to.isContract()) {
            try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
                return retval == IERC721Receiver.onERC721Received.selector;
            } catch (bytes memory reason) {
                if (reason.length == 0) {
                    revert("ERC721: transfer to non ERC721Receiver implementer");
                } else {
                    assembly {
                        revert(add(32, reason), mload(reason))
                    }
                }
            }
        } else {
            return true;
        }
    }

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

    /**
     * @dev Hook that is called after any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _afterTokenTransfer(
        address from,
        address to,
        uint256 tokenId
    ) internal virtual {}
}

// File: @openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol


// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/ERC721Enumerable.sol)

pragma solidity ^0.8.0;



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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

// File: @openzeppelin/contracts/token/ERC20/IERC20.sol


// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

// File: @openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol


// OpenZeppelin Contracts v4.4.1 (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;



/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using Address for address;

    function safeTransfer(
        IERC20 token,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(
        IERC20 token,
        address from,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        require(
            (value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    function safeIncreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender) + value;
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            uint256 newAllowance = oldAllowance - value;
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
        }
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        if (returndata.length > 0) {
            // Return data is optional
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

// File: contracts/libraries/TransferHelper.sol


pragma solidity ^0.8.13;




library TransferHelper {
  using SafeERC20 for IERC20;


  /// @notice This function used for standard ERC20 transfers 
  /// @notice it contains a pre and post balance check
  /// @notice as well as a check on the msg.senders balance
  /// @param token is the address of the ERC20 being transferred
  /// @param from is the remitting address
  /// @param to is the location where they are being delivered
  function transferTokens(
    address token,
    address from,
    address to,
    uint256 amount
  ) internal {
    uint256 priorBalance = IERC20(token).balanceOf(address(to));
    require(IERC20(token).balanceOf(msg.sender) >= amount, 'THL01');
    SafeERC20.safeTransferFrom(IERC20(token), from, to, amount);
    uint256 postBalance = IERC20(token).balanceOf(address(to));
    require(postBalance - priorBalance == amount, "THL02");
  }

  function withdrawTokens(
    address token,
    address to,
    uint256 amount
  ) internal {
    uint256 priorBalance = IERC20(token).balanceOf(address(to));
    SafeERC20.safeTransfer(IERC20(token), to, amount);
    uint256 postBalance = IERC20(token).balanceOf(address(to));
    require(postBalance - priorBalance == amount, "THL02");
  }

  
  /// @dev internal function that handles transfering payments from buyers to sellers with special WETH handling
  /// @dev this function assumes that if the recipient address is a contract, it cannot handle ETH - so we always deliver WETH
  /// @dev special care needs to be taken when using contract addresses to sell deals - to ensure it can handle WETH properly when received
  function transferPayment(
    address weth,
    address token,
    address from,
    address payable to,
    uint256 amount
  ) internal {
    if (token == weth) {
      require(msg.value == amount, 'THL03');
      if (!Address.isContract(to)) {
        (bool success, ) = to.call{value: amount}("");
        require(success, "THL04");
      } else {
        // we want to deliver WETH from ETH here for better handling at contract
        IWETH(weth).deposit{value: amount}();
        assert(IWETH(weth).transfer(to, amount));
      }
    } else {
      transferTokens(token, from, to, amount); 
    }
  }

  /// @dev internal funciton that handles withdrawing tokens that are up for sale to buyers
  /// @dev this function is only called if the tokens are not timelocked
  /// @dev this function handles weth specially and delivers ETH to the recipient
  function withdrawPayment(
    address weth,
    address token,
    address payable to,
    uint256 amount
  ) internal {
    if (token == weth) {
      IWETH(weth).withdraw(amount);
      (bool success, ) = to.call{value: amount}("");
      require(success, "THL04");
    } else {
      withdrawTokens(token, to, amount);
    }
  }


}

// File: contracts/Hedgeys.sol


pragma solidity 0.8.13;









/**
 * @title An NFT representation of ownership of time locked tokens
 * @notice The time locked tokens are redeemable by the owner of the NFT
 * @notice The NFT is basic ERC721 with an ownable usage to ensure only a single owner call mint new NFTs
 * @notice it uses the Enumerable extension to allow for easy lookup to pull balances of one account for multiple NFTs
 */
contract Hedgeys is ERC721Enumerable, ReentrancyGuard {
  using SafeERC20 for IERC20;
  using Counters for Counters.Counter;
  Counters.Counter private _tokenIds;

  address payable public weth;
  string private baseURI;
  uint8 private uriSet = 0;

  /// @dev the Future is the storage in a struct of the tokens that are time locked
  /// @dev the Future contains the information about the amount of tokens, the underlying token address (asset), and the date in which they are unlocked
  struct Future {
    uint256 amount;
    address token;
    uint256 unlockDate;
  }

  /// @dev this maping maps the same uint from Counters that is used to mint an NFT to the Future struct
  mapping(uint256 => Future) public futures;

  constructor(address payable _weth, string memory uri) ERC721('Hedgeys', 'HDGY') {
    weth = _weth;
    baseURI = uri;
  }

  receive() external payable {}


  /**
   * @notice The external function creates a Future position
   * @notice This funciton does not accept ETH, must send in wrapped ETH to lock ETH
   * @notice A Future position is the combination of an NFT and a Future struct with the same index uint storing both information separately but with the same index
   * @notice Anyone can mint an NFT & create a futures Struct, so long as they have sufficient tokens to lock up
   * @notice A user can mint the NFT to themselves, passing in their address to the first parameter, or they can directly assign and mint it to another wallet
   * @param _holder is the owner of the minted NFT and the owner of the locked tokens
   * @param _amount is the amount with full decimals of the tokens being locked into the future
   * @param _token is the address of the tokens that are being delivered to this contract to be held and locked
   * @param _unlockDate is the date in UTC in which the tokens can become redeemed - evaluated based on the block.timestamp
   */
  function createNFT(
    address _holder,
    uint256 _amount,
    address _token,
    uint256 _unlockDate
  ) external nonReentrant returns (uint256) {
    _tokenIds.increment();
    uint256 newItemId = _tokenIds.current();
    /// @dev require that the amount is not 0, address is not the 0 address, and that the expiration date is actually beyond today
    require(_amount > 0 && _token != address(0) && _unlockDate > block.timestamp, 'NFT01');
    /// @dev using the same newItemID we generate a Future struct recording the token address (asset), the amount of tokens (amount), and time it can be unlocked (_expiry)
    futures[newItemId] = Future(_amount, _token, _unlockDate);
    /// @dev pulls funds from the msg.sender into this contract for escrow
    TransferHelper.transferTokens(_token, msg.sender, address(this), _amount);
    _safeMint(_holder, newItemId);
    emit NFTCreated(newItemId, _holder, _amount, _token, _unlockDate);
    return newItemId;
  }

  /// @dev internal function used by the standard ER721 function tokenURI to retrieve the baseURI privately held to visualize and get the metadata
  function _baseURI() internal view override returns (string memory) {
    return baseURI;
  }

  /// @dev onlyOwner function to set the base URI after the contract has been launched
  /// @dev there is no actual on-chain functions that require this URI to be anything beyond a blank string ("")
  /// @dev there are no vulnerabilities should this be changed as it is for astetic purposes only
  function updateBaseURI(string memory _uri) external {
    require(uriSet == 0, 'NFT02');
    baseURI = _uri;
    uriSet = 1;
    emit URISet(_uri);
  }

  /// @notice this is the external function that actually redeems an NFT position
  /// @dev this function calls the _redeemFuture(...) internal function which handles the requirements and checks
  function redeemNFT(uint256 _id) external nonReentrant returns (bool) {
    _redeemNFT(payable(msg.sender), _id);
    return true;
  }

  /**
   * @notice This internal function, called by redeemNFT to physically burn the NFT and distribute the locked tokens to its owner
   * @dev this function does five things: 1) Checks to ensure only the owner of the NFT can call this function
   * @dev 2) it checks that the tokens can actually be unlocked based on the time from the expiration
   * @dev 3) it burns the NFT - removing it from storage entirely
   * @dev 4) it also deletes the futures struct from storage so that nothing can be redeemed from that storage index again
   * @dev 5) it withdraws the tokens that have been locked - delivering them to the current owner of the NFT
   */
  function _redeemNFT(address payable _holder, uint256 _id) internal {
    require(ownerOf(_id) == _holder, 'NFT03');
    Future memory future = futures[_id];
    require(future.unlockDate < block.timestamp && future.amount > 0, 'NFT04');
    //delivers the vested tokens to the vester
    emit NFTRedeemed(_id, _holder, future.amount, future.token, future.unlockDate);
    _burn(_id);
    TransferHelper.withdrawPayment(weth, future.token, _holder, future.amount);
    delete futures[_id];
  }

  

  ///@notice Events when a new NFT (future) is created and one with a Future is redeemed (burned)
  event NFTCreated(uint256 _i, address _holder, uint256 _amount, address _token, uint256 _unlockDate);
  event NFTRedeemed(uint256 _i, address _holder, uint256 _amount, address _token, uint256 _unlockDate);
  event URISet(string newURI);
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"address payable","name":"_weth","type":"address"},{"internalType":"string","name":"uri","type":"string"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"approved","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"operator","type":"address"},{"indexed":false,"internalType":"bool","name":"approved","type":"bool"}],"name":"ApprovalForAll","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"_i","type":"uint256"},{"indexed":false,"internalType":"address","name":"_holder","type":"address"},{"indexed":false,"internalType":"uint256","name":"_amount","type":"uint256"},{"indexed":false,"internalType":"address","name":"_token","type":"address"},{"indexed":false,"internalType":"uint256","name":"_unlockDate","type":"uint256"}],"name":"NFTCreated","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"_i","type":"uint256"},{"indexed":false,"internalType":"address","name":"_holder","type":"address"},{"indexed":false,"internalType":"uint256","name":"_amount","type":"uint256"},{"indexed":false,"internalType":"address","name":"_token","type":"address"},{"indexed":false,"internalType":"uint256","name":"_unlockDate","type":"uint256"}],"name":"NFTRedeemed","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"string","name":"newURI","type":"string"}],"name":"URISet","type":"event"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"approve","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_holder","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"},{"internalType":"address","name":"_token","type":"address"},{"internalType":"uint256","name":"_unlockDate","type":"uint256"}],"name":"createNFT","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"futures","outputs":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"unlockDate","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"getApproved","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"operator","type":"address"}],"name":"isApprovedForAll","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"ownerOf","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_id","type":"uint256"}],"name":"redeemNFT","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"bytes","name":"_data","type":"bytes"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"operator","type":"address"},{"internalType":"bool","name":"approved","type":"bool"}],"name":"setApprovalForAll","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"index","type":"uint256"}],"name":"tokenByIndex","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"uint256","name":"index","type":"uint256"}],"name":"tokenOfOwnerByIndex","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"tokenURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"transferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"_uri","type":"string"}],"name":"updateBaseURI","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"weth","outputs":[{"internalType":"address payable","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"stateMutability":"payable","type":"receive"}]

6080604052600e805460ff191690553480156200001b57600080fd5b50604051620029e1380380620029e18339810160408190526200003e916200019c565b60408051808201825260078152664865646765797360c81b6020808301918252835180850190945260048452634844475960e01b9084015281519192916200008991600091620000e0565b5080516200009f906001906020840190620000e0565b50506001600a5550600c80546001600160a01b0319166001600160a01b0384161790558051620000d790600d906020840190620000e0565b505050620002d8565b828054620000ee906200029c565b90600052602060002090601f0160209004810192826200011257600085556200015d565b82601f106200012d57805160ff19168380011785556200015d565b828001600101855582156200015d579182015b828111156200015d57825182559160200191906001019062000140565b506200016b9291506200016f565b5090565b5b808211156200016b576000815560010162000170565b634e487b7160e01b600052604160045260246000fd5b60008060408385031215620001b057600080fd5b82516001600160a01b0381168114620001c857600080fd5b602084810151919350906001600160401b0380821115620001e857600080fd5b818601915086601f830112620001fd57600080fd5b81518181111562000212576200021262000186565b604051601f8201601f19908116603f011681019083821181831017156200023d576200023d62000186565b8160405282815289868487010111156200025657600080fd5b600093505b828410156200027a57848401860151818501870152928501926200025b565b828411156200028c5760008684830101525b8096505050505050509250929050565b600181811c90821680620002b157607f821691505b602082108103620002d257634e487b7160e01b600052602260045260246000fd5b50919050565b6126f980620002e86000396000f3fe60806040526004361061012e5760003560e01c806358dc2cdb116100ab57806395d89b411161006f57806395d89b4114610392578063a22cb465146103a7578063b273e653146103c7578063b88d4fde146103e7578063c87b56dd14610407578063e985e9c51461042757600080fd5b806358dc2cdb146102aa5780636352211e146102ca57806370a08231146102ea5780638a1a110d1461030a578063931688cb1461037257600080fd5b806323b872dd116100f257806323b872dd1461020a5780632f745c591461022a5780633fc8cef31461024a57806342842e0e1461026a5780634f6ccce71461028a57600080fd5b806301ffc9a71461013a57806306fdde031461016f578063081812fc14610191578063095ea7b3146101c957806318160ddd146101eb57600080fd5b3661013557005b600080fd5b34801561014657600080fd5b5061015a6101553660046120f8565b610470565b60405190151581526020015b60405180910390f35b34801561017b57600080fd5b5061018461049b565b604051610166919061216d565b34801561019d57600080fd5b506101b16101ac366004612180565b61052d565b6040516001600160a01b039091168152602001610166565b3480156101d557600080fd5b506101e96101e43660046121b5565b6105c7565b005b3480156101f757600080fd5b506008545b604051908152602001610166565b34801561021657600080fd5b506101e96102253660046121df565b6106dc565b34801561023657600080fd5b506101fc6102453660046121b5565b61070d565b34801561025657600080fd5b50600c546101b1906001600160a01b031681565b34801561027657600080fd5b506101e96102853660046121df565b6107a3565b34801561029657600080fd5b506101fc6102a5366004612180565b6107be565b3480156102b657600080fd5b5061015a6102c5366004612180565b610851565b3480156102d657600080fd5b506101b16102e5366004612180565b6108c0565b3480156102f657600080fd5b506101fc61030536600461221b565b610937565b34801561031657600080fd5b5061034f610325366004612180565b600f6020526000908152604090208054600182015460029092015490916001600160a01b03169083565b604080519384526001600160a01b03909216602084015290820152606001610166565b34801561037e57600080fd5b506101e961038d3660046122c2565b6109be565b34801561039e57600080fd5b50610184610a55565b3480156103b357600080fd5b506101e96103c2366004612319565b610a64565b3480156103d357600080fd5b506101fc6103e2366004612350565b610a73565b3480156103f357600080fd5b506101e9610402366004612394565b610c10565b34801561041357600080fd5b50610184610422366004612180565b610c48565b34801561043357600080fd5b5061015a610442366004612410565b6001600160a01b03918216600090815260056020908152604080832093909416825291909152205460ff1690565b60006001600160e01b0319821663780e9d6360e01b1480610495575061049582610d23565b92915050565b6060600080546104aa90612443565b80601f01602080910402602001604051908101604052809291908181526020018280546104d690612443565b80156105235780601f106104f857610100808354040283529160200191610523565b820191906000526020600020905b81548152906001019060200180831161050657829003601f168201915b5050505050905090565b6000818152600260205260408120546001600160a01b03166105ab5760405162461bcd60e51b815260206004820152602c60248201527f4552433732313a20617070726f76656420717565727920666f72206e6f6e657860448201526b34b9ba32b73a103a37b5b2b760a11b60648201526084015b60405180910390fd5b506000908152600460205260409020546001600160a01b031690565b60006105d2826108c0565b9050806001600160a01b0316836001600160a01b03160361063f5760405162461bcd60e51b815260206004820152602160248201527f4552433732313a20617070726f76616c20746f2063757272656e74206f776e656044820152603960f91b60648201526084016105a2565b336001600160a01b038216148061065b575061065b8133610442565b6106cd5760405162461bcd60e51b815260206004820152603860248201527f4552433732313a20617070726f76652063616c6c6572206973206e6f74206f7760448201527f6e6572206e6f7220617070726f76656420666f7220616c6c000000000000000060648201526084016105a2565b6106d78383610d73565b505050565b6106e63382610de1565b6107025760405162461bcd60e51b81526004016105a29061247d565b6106d7838383610ed8565b600061071883610937565b821061077a5760405162461bcd60e51b815260206004820152602b60248201527f455243373231456e756d657261626c653a206f776e657220696e646578206f7560448201526a74206f6620626f756e647360a81b60648201526084016105a2565b506001600160a01b03919091166000908152600660209081526040808320938352929052205490565b6106d783838360405180602001604052806000815250610c10565b60006107c960085490565b821061082c5760405162461bcd60e51b815260206004820152602c60248201527f455243373231456e756d657261626c653a20676c6f62616c20696e646578206f60448201526b7574206f6620626f756e647360a01b60648201526084016105a2565b6008828154811061083f5761083f6124ce565b90600052602060002001549050919050565b60006002600a54036108a55760405162461bcd60e51b815260206004820152601f60248201527f5265656e7472616e637947756172643a207265656e7472616e742063616c6c0060448201526064016105a2565b6002600a556108b4338361107f565b50600180600a55919050565b6000818152600260205260408120546001600160a01b0316806104955760405162461bcd60e51b815260206004820152602960248201527f4552433732313a206f776e657220717565727920666f72206e6f6e657869737460448201526832b73a103a37b5b2b760b91b60648201526084016105a2565b60006001600160a01b0382166109a25760405162461bcd60e51b815260206004820152602a60248201527f4552433732313a2062616c616e636520717565727920666f7220746865207a65604482015269726f206164647265737360b01b60648201526084016105a2565b506001600160a01b031660009081526003602052604090205490565b600e5460ff16156109f95760405162461bcd60e51b815260206004820152600560248201526427232a181960d91b60448201526064016105a2565b8051610a0c90600d906020840190612046565b50600e805460ff191660011790556040517fde63cc2d19581e57e158d078c2df83f9ab70addd6257f7f12bfecb21c06c912890610a4a90839061216d565b60405180910390a150565b6060600180546104aa90612443565b610a6f338383611213565b5050565b60006002600a5403610ac75760405162461bcd60e51b815260206004820152601f60248201527f5265656e7472616e637947756172643a207265656e7472616e742063616c6c0060448201526064016105a2565b6002600a55610ada600b80546001019055565b6000610ae5600b5490565b9050600085118015610aff57506001600160a01b03841615155b8015610b0a57504283115b610b3e5760405162461bcd60e51b81526020600482015260056024820152644e4654303160d81b60448201526064016105a2565b604080516060810182528681526001600160a01b0386811660208084019182528385018881526000878152600f90925294902092518355516001830180546001600160a01b031916919092161790559051600290910155610ba1843330886112e1565b610bab86826114b6565b604080518281526001600160a01b038881166020830152818301889052861660608201526080810185905290517fcd994fa262ab94dc214c94042fdc0563334c749730f5b49663732eda398fe1299181900360a00190a16001600a5595945050505050565b610c1a3383610de1565b610c365760405162461bcd60e51b81526004016105a29061247d565b610c42848484846114d0565b50505050565b6000818152600260205260409020546060906001600160a01b0316610cc75760405162461bcd60e51b815260206004820152602f60248201527f4552433732314d657461646174613a2055524920717565727920666f72206e6f60448201526e3732bc34b9ba32b73a103a37b5b2b760891b60648201526084016105a2565b6000610cd1611503565b90506000815111610cf15760405180602001604052806000815250610d1c565b80610cfb84611512565b604051602001610d0c9291906124e4565b6040516020818303038152906040525b9392505050565b60006001600160e01b031982166380ac58cd60e01b1480610d5457506001600160e01b03198216635b5e139f60e01b145b8061049557506301ffc9a760e01b6001600160e01b0319831614610495565b600081815260046020526040902080546001600160a01b0319166001600160a01b0384169081179091558190610da8826108c0565b6001600160a01b03167f8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b92560405160405180910390a45050565b6000818152600260205260408120546001600160a01b0316610e5a5760405162461bcd60e51b815260206004820152602c60248201527f4552433732313a206f70657261746f7220717565727920666f72206e6f6e657860448201526b34b9ba32b73a103a37b5b2b760a11b60648201526084016105a2565b6000610e65836108c0565b9050806001600160a01b0316846001600160a01b03161480610ea05750836001600160a01b0316610e958461052d565b6001600160a01b0316145b80610ed057506001600160a01b0380821660009081526005602090815260408083209388168352929052205460ff165b949350505050565b826001600160a01b0316610eeb826108c0565b6001600160a01b031614610f4f5760405162461bcd60e51b815260206004820152602560248201527f4552433732313a207472616e736665722066726f6d20696e636f72726563742060448201526437bbb732b960d91b60648201526084016105a2565b6001600160a01b038216610fb15760405162461bcd60e51b8152602060048201526024808201527f4552433732313a207472616e7366657220746f20746865207a65726f206164646044820152637265737360e01b60648201526084016105a2565b610fbc838383611613565b610fc7600082610d73565b6001600160a01b0383166000908152600360205260408120805460019290610ff0908490612529565b90915550506001600160a01b038216600090815260036020526040812080546001929061101e908490612540565b909155505060008181526002602052604080822080546001600160a01b0319166001600160a01b0386811691821790925591518493918716917fddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef91a4505050565b816001600160a01b0316611092826108c0565b6001600160a01b0316146110d05760405162461bcd60e51b81526020600482015260056024820152644e4654303360d81b60448201526064016105a2565b6000818152600f602090815260409182902082516060810184528154815260018201546001600160a01b03169281019290925260020154918101829052904211801561111c5750805115155b6111505760405162461bcd60e51b81526020600482015260056024820152641391950c0d60da1b60448201526064016105a2565b8051602082015160408084015190517f59e3d61947ca8bf2d075b2e99dd29f02f9be1be5206aa07df0fff70a8b1ca5b9936111b793879389939485526001600160a01b03938416602086015260408501929092529091166060830152608082015260a00190565b60405180910390a16111c8826116cb565b600c54602082015182516111e8926001600160a01b031691908690611772565b506000908152600f602052604081208181556001810180546001600160a01b03191690556002015550565b816001600160a01b0316836001600160a01b0316036112745760405162461bcd60e51b815260206004820152601960248201527f4552433732313a20617070726f766520746f2063616c6c65720000000000000060448201526064016105a2565b6001600160a01b03838116600081815260056020908152604080832094871680845294825291829020805460ff191686151590811790915591519182527f17307eab39ab6107e8899845ad3d59bd9653f200f220920489ca2b5937696c31910160405180910390a3505050565b6040516370a0823160e01b81526001600160a01b038381166004830152600091908616906370a0823190602401602060405180830381865afa15801561132b573d6000803e3d6000fd5b505050506040513d601f19601f8201168201806040525081019061134f9190612558565b6040516370a0823160e01b815233600482015290915082906001600160a01b038716906370a0823190602401602060405180830381865afa158015611398573d6000803e3d6000fd5b505050506040513d601f19601f820116820180604052508101906113bc9190612558565b10156113f25760405162461bcd60e51b815260206004820152600560248201526454484c303160d81b60448201526064016105a2565b6113fe85858585611881565b6040516370a0823160e01b81526001600160a01b038481166004830152600091908716906370a0823190602401602060405180830381865afa158015611448573d6000803e3d6000fd5b505050506040513d601f19601f8201168201806040525081019061146c9190612558565b9050826114798383612529565b146114ae5760405162461bcd60e51b81526020600482015260056024820152642a2426181960d91b60448201526064016105a2565b505050505050565b610a6f8282604051806020016040528060008152506118ec565b6114db848484610ed8565b6114e78484848461191f565b610c425760405162461bcd60e51b81526004016105a290612571565b6060600d80546104aa90612443565b6060816000036115395750506040805180820190915260018152600360fc1b602082015290565b8160005b8115611563578061154d816125c3565b915061155c9050600a836125f2565b915061153d565b60008167ffffffffffffffff81111561157e5761157e612236565b6040519080825280601f01601f1916602001820160405280156115a8576020820181803683370190505b5090505b8415610ed0576115bd600183612529565b91506115ca600a86612606565b6115d5906030612540565b60f81b8183815181106115ea576115ea6124ce565b60200101906001600160f81b031916908160001a90535061160c600a866125f2565b94506115ac565b6001600160a01b03831661166e5761166981600880546000838152600960205260408120829055600182018355919091527ff3f7a9fe364faab93b216da50a3214154f22a0a2b415b23a84c8169e8b636ee30155565b611691565b816001600160a01b0316836001600160a01b031614611691576116918382611a20565b6001600160a01b0382166116a8576106d781611abd565b826001600160a01b0316826001600160a01b0316146106d7576106d78282611b6c565b60006116d6826108c0565b90506116e481600084611613565b6116ef600083610d73565b6001600160a01b0381166000908152600360205260408120805460019290611718908490612529565b909155505060008281526002602052604080822080546001600160a01b0319169055518391906001600160a01b038416907fddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef908390a45050565b836001600160a01b0316836001600160a01b03160361187657604051632e1a7d4d60e01b8152600481018290526001600160a01b03851690632e1a7d4d90602401600060405180830381600087803b1580156117cd57600080fd5b505af11580156117e1573d6000803e3d6000fd5b505050506000826001600160a01b03168260405160006040518083038185875af1925050503d8060008114611832576040519150601f19603f3d011682016040523d82523d6000602084013e611837565b606091505b50509050806118705760405162461bcd60e51b81526020600482015260056024820152641512130c0d60da1b60448201526064016105a2565b50610c42565b610c42838383611bb0565b6040516001600160a01b0380851660248301528316604482015260648101829052610c429085906323b872dd60e01b906084015b60408051601f198184030181529190526020810180516001600160e01b03166001600160e01b031990931692909217909152611ce2565b6118f68383611db4565b611903600084848461191f565b6106d75760405162461bcd60e51b81526004016105a290612571565b60006001600160a01b0384163b15611a1557604051630a85bd0160e11b81526001600160a01b0385169063150b7a029061196390339089908890889060040161261a565b6020604051808303816000875af192505050801561199e575060408051601f3d908101601f1916820190925261199b91810190612657565b60015b6119fb573d8080156119cc576040519150601f19603f3d011682016040523d82523d6000602084013e6119d1565b606091505b5080516000036119f35760405162461bcd60e51b81526004016105a290612571565b805181602001fd5b6001600160e01b031916630a85bd0160e11b149050610ed0565b506001949350505050565b60006001611a2d84610937565b611a379190612529565b600083815260076020526040902054909150808214611a8a576001600160a01b03841660009081526006602090815260408083208584528252808320548484528184208190558352600790915290208190555b5060009182526007602090815260408084208490556001600160a01b039094168352600681528383209183525290812055565b600854600090611acf90600190612529565b60008381526009602052604081205460088054939450909284908110611af757611af76124ce565b906000526020600020015490508060088381548110611b1857611b186124ce565b6000918252602080832090910192909255828152600990915260408082208490558582528120556008805480611b5057611b50612674565b6001900381819060005260206000200160009055905550505050565b6000611b7783610937565b6001600160a01b039093166000908152600660209081526040808320868452825280832085905593825260079052919091209190915550565b6040516370a0823160e01b81526001600160a01b038381166004830152600091908516906370a0823190602401602060405180830381865afa158015611bfa573d6000803e3d6000fd5b505050506040513d601f19601f82011682018060405250810190611c1e9190612558565b9050611c2b848484611f02565b6040516370a0823160e01b81526001600160a01b038481166004830152600091908616906370a0823190602401602060405180830381865afa158015611c75573d6000803e3d6000fd5b505050506040513d601f19601f82011682018060405250810190611c999190612558565b905082611ca68383612529565b14611cdb5760405162461bcd60e51b81526020600482015260056024820152642a2426181960d91b60448201526064016105a2565b5050505050565b6000611d37826040518060400160405280602081526020017f5361666545524332303a206c6f772d6c6576656c2063616c6c206661696c6564815250856001600160a01b0316611f329092919063ffffffff16565b8051909150156106d75780806020019051810190611d55919061268a565b6106d75760405162461bcd60e51b815260206004820152602a60248201527f5361666545524332303a204552433230206f7065726174696f6e20646964206e6044820152691bdd081cdd58d8d9595960b21b60648201526084016105a2565b6001600160a01b038216611e0a5760405162461bcd60e51b815260206004820181905260248201527f4552433732313a206d696e7420746f20746865207a65726f206164647265737360448201526064016105a2565b6000818152600260205260409020546001600160a01b031615611e6f5760405162461bcd60e51b815260206004820152601c60248201527f4552433732313a20746f6b656e20616c7265616479206d696e7465640000000060448201526064016105a2565b611e7b60008383611613565b6001600160a01b0382166000908152600360205260408120805460019290611ea4908490612540565b909155505060008181526002602052604080822080546001600160a01b0319166001600160a01b03861690811790915590518392907fddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef908290a45050565b6040516001600160a01b0383166024820152604481018290526106d790849063a9059cbb60e01b906064016118b5565b6060610ed08484600085856001600160a01b0385163b611f945760405162461bcd60e51b815260206004820152601d60248201527f416464726573733a2063616c6c20746f206e6f6e2d636f6e747261637400000060448201526064016105a2565b600080866001600160a01b03168587604051611fb091906126a7565b60006040518083038185875af1925050503d8060008114611fed576040519150601f19603f3d011682016040523d82523d6000602084013e611ff2565b606091505b509150915061200282828661200d565b979650505050505050565b6060831561201c575081610d1c565b82511561202c5782518084602001fd5b8160405162461bcd60e51b81526004016105a2919061216d565b82805461205290612443565b90600052602060002090601f01602090048101928261207457600085556120ba565b82601f1061208d57805160ff19168380011785556120ba565b828001600101855582156120ba579182015b828111156120ba57825182559160200191906001019061209f565b506120c69291506120ca565b5090565b5b808211156120c657600081556001016120cb565b6001600160e01b0319811681146120f557600080fd5b50565b60006020828403121561210a57600080fd5b8135610d1c816120df565b60005b83811015612130578181015183820152602001612118565b83811115610c425750506000910152565b60008151808452612159816020860160208601612115565b601f01601f19169290920160200192915050565b602081526000610d1c6020830184612141565b60006020828403121561219257600080fd5b5035919050565b80356001600160a01b03811681146121b057600080fd5b919050565b600080604083850312156121c857600080fd5b6121d183612199565b946020939093013593505050565b6000806000606084860312156121f457600080fd5b6121fd84612199565b925061220b60208501612199565b9150604084013590509250925092565b60006020828403121561222d57600080fd5b610d1c82612199565b634e487b7160e01b600052604160045260246000fd5b600067ffffffffffffffff8084111561226757612267612236565b604051601f8501601f19908116603f0116810190828211818310171561228f5761228f612236565b816040528093508581528686860111156122a857600080fd5b858560208301376000602087830101525050509392505050565b6000602082840312156122d457600080fd5b813567ffffffffffffffff8111156122eb57600080fd5b8201601f810184136122fc57600080fd5b610ed08482356020840161224c565b80151581146120f557600080fd5b6000806040838503121561232c57600080fd5b61233583612199565b915060208301356123458161230b565b809150509250929050565b6000806000806080858703121561236657600080fd5b61236f85612199565b93506020850135925061238460408601612199565b9396929550929360600135925050565b600080600080608085870312156123aa57600080fd5b6123b385612199565b93506123c160208601612199565b925060408501359150606085013567ffffffffffffffff8111156123e457600080fd5b8501601f810187136123f557600080fd5b6124048782356020840161224c565b91505092959194509250565b6000806040838503121561242357600080fd5b61242c83612199565b915061243a60208401612199565b90509250929050565b600181811c9082168061245757607f821691505b60208210810361247757634e487b7160e01b600052602260045260246000fd5b50919050565b60208082526031908201527f4552433732313a207472616e736665722063616c6c6572206973206e6f74206f6040820152701ddb995c881b9bdc88185c1c1c9bdd9959607a1b606082015260800190565b634e487b7160e01b600052603260045260246000fd5b600083516124f6818460208801612115565b83519083019061250a818360208801612115565b01949350505050565b634e487b7160e01b600052601160045260246000fd5b60008282101561253b5761253b612513565b500390565b6000821982111561255357612553612513565b500190565b60006020828403121561256a57600080fd5b5051919050565b60208082526032908201527f4552433732313a207472616e7366657220746f206e6f6e20455243373231526560408201527131b2b4bb32b91034b6b83632b6b2b73a32b960711b606082015260800190565b6000600182016125d5576125d5612513565b5060010190565b634e487b7160e01b600052601260045260246000fd5b600082612601576126016125dc565b500490565b600082612615576126156125dc565b500690565b6001600160a01b038581168252841660208201526040810183905260806060820181905260009061264d90830184612141565b9695505050505050565b60006020828403121561266957600080fd5b8151610d1c816120df565b634e487b7160e01b600052603160045260246000fd5b60006020828403121561269c57600080fd5b8151610d1c8161230b565b600082516126b9818460208701612115565b919091019291505056fea264697066735822122016750d81edc923a9a75d7ab042a5f765d238433d417044c3d5ad43fe9cb3a39d64736f6c634300080d0033000000000000000000000000e91d153e0b41518a2ce8dd3d7944fa863463a97d00000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000000

000000000000000000000000e91d153e0b41518a2ce8dd3d7944fa863463a97d00000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000000

-----Decoded View---------------
Arg [0] : _weth (address): 0xe91d153e0b41518a2ce8dd3d7944fa863463a97d
Arg [1] : uri (string): 

-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 000000000000000000000000e91d153e0b41518a2ce8dd3d7944fa863463a97d
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000040
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000000