Contract Source Code (Solidity Standard Json-Input format)

IDE

• Blockscan IDE
• 🤖 Code ReaderBeta
• Remix IDE

More Options

• Similar
• Sol2Uml
• Submit Audit
• Compare

/**
 *Submitted for verification at Etherscan.io on 2021-04-22
*/

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

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <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 GSN 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 payable) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}

// File: @openzeppelin/contracts/introspection/IERC165.sol





/**
 * @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/token/ERC721/IERC721.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;
}

// File: @openzeppelin/contracts/token/ERC721/IERC721Metadata.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);
}

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






/**
 * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721Enumerable is IERC721 {

    /**
     * @dev Returns the total amount of tokens stored by the contract.
     */
    function totalSupply() external view returns (uint256);

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

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

// File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol





/**
 * @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/introspection/ERC165.sol






/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts may inherit from this and call {_registerInterface} to declare
 * their support of an interface.
 */
abstract contract ERC165 is IERC165 {
    /*
     * bytes4(keccak256('supportsInterface(bytes4)')) == 0x01ffc9a7
     */
    bytes4 private constant _INTERFACE_ID_ERC165 = 0x01ffc9a7;

    /**
     * @dev Mapping of interface ids to whether or not it's supported.
     */
    mapping(bytes4 => bool) private _supportedInterfaces;

    constructor () internal {
        // Derived contracts need only register support for their own interfaces,
        // we register support for ERC165 itself here
        _registerInterface(_INTERFACE_ID_ERC165);
    }

    /**
     * @dev See {IERC165-supportsInterface}.
     *
     * Time complexity O(1), guaranteed to always use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return _supportedInterfaces[interfaceId];
    }

    /**
     * @dev Registers the contract as an implementer of the interface defined by
     * `interfaceId`. Support of the actual ERC165 interface is automatic and
     * registering its interface id is not required.
     *
     * See {IERC165-supportsInterface}.
     *
     * Requirements:
     *
     * - `interfaceId` cannot be the ERC165 invalid interface (`0xffffffff`).
     */
    function _registerInterface(bytes4 interfaceId) internal virtual {
        require(interfaceId != 0xffffffff, "ERC165: invalid interface id");
        _supportedInterfaces[interfaceId] = true;
    }
}

// File: @openzeppelin/contracts/math/SafeMath.sol





/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        uint256 c = a + b;
        if (c < a) return (false, 0);
        return (true, c);
    }

    /**
     * @dev Returns the substraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b > a) return (false, 0);
        return (true, a - b);
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) return (true, 0);
        uint256 c = a * b;
        if (c / a != b) return (false, 0);
        return (true, c);
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b == 0) return (false, 0);
        return (true, a / b);
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b == 0) return (false, 0);
        return (true, a % b);
    }

    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");
        return c;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b <= a, "SafeMath: subtraction overflow");
        return a - b;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) return 0;
        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");
        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b > 0, "SafeMath: division by zero");
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b > 0, "SafeMath: modulo by zero");
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        return a - b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryDiv}.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        return a % b;
    }
}

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





/**
 * @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;
        // solhint-disable-next-line no-inline-assembly
        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");

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (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");

        // solhint-disable-next-line avoid-low-level-calls
        (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");

        // solhint-disable-next-line avoid-low-level-calls
        (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");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private 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

                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

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





/**
 * @dev Library for managing
 * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
 * types.
 *
 * Sets have the following properties:
 *
 * - Elements are added, removed, and checked for existence in constant time
 * (O(1)).
 * - Elements are enumerated in O(n). No guarantees are made on the ordering.
 *
 * ```
 * contract Example {
 *     // Add the library methods
 *     using EnumerableSet for EnumerableSet.AddressSet;
 *
 *     // Declare a set state variable
 *     EnumerableSet.AddressSet private mySet;
 * }
 * ```
 *
 * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
 * and `uint256` (`UintSet`) are supported.
 */
library EnumerableSet {
    // To implement this library for multiple types with as little code
    // repetition as possible, we write it in terms of a generic Set type with
    // bytes32 values.
    // The Set implementation uses private functions, and user-facing
    // implementations (such as AddressSet) are just wrappers around the
    // underlying Set.
    // This means that we can only create new EnumerableSets for types that fit
    // in bytes32.

    struct Set {
        // Storage of set values
        bytes32[] _values;

        // Position of the value in the `values` array, plus 1 because index 0
        // means a value is not in the set.
        mapping (bytes32 => uint256) _indexes;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function _add(Set storage set, bytes32 value) private returns (bool) {
        if (!_contains(set, value)) {
            set._values.push(value);
            // The value is stored at length-1, but we add 1 to all indexes
            // and use 0 as a sentinel value
            set._indexes[value] = set._values.length;
            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function _remove(Set storage set, bytes32 value) private returns (bool) {
        // We read and store the value's index to prevent multiple reads from the same storage slot
        uint256 valueIndex = set._indexes[value];

        if (valueIndex != 0) { // Equivalent to contains(set, value)
            // To delete an element from the _values array in O(1), we swap the element to delete with the last one in
            // the array, and then remove the last element (sometimes called as 'swap and pop').
            // This modifies the order of the array, as noted in {at}.

            uint256 toDeleteIndex = valueIndex - 1;
            uint256 lastIndex = set._values.length - 1;

            // When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs
            // so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement.

            bytes32 lastvalue = set._values[lastIndex];

            // Move the last value to the index where the value to delete is
            set._values[toDeleteIndex] = lastvalue;
            // Update the index for the moved value
            set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based

            // Delete the slot where the moved value was stored
            set._values.pop();

            // Delete the index for the deleted slot
            delete set._indexes[value];

            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function _contains(Set storage set, bytes32 value) private view returns (bool) {
        return set._indexes[value] != 0;
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function _length(Set storage set) private view returns (uint256) {
        return set._values.length;
    }

   /**
    * @dev Returns the value stored at position `index` in the set. O(1).
    *
    * Note that there are no guarantees on the ordering of values inside the
    * array, and it may change when more values are added or removed.
    *
    * Requirements:
    *
    * - `index` must be strictly less than {length}.
    */
    function _at(Set storage set, uint256 index) private view returns (bytes32) {
        require(set._values.length > index, "EnumerableSet: index out of bounds");
        return set._values[index];
    }

    // Bytes32Set

    struct Bytes32Set {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _add(set._inner, value);
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _remove(set._inner, value);
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
        return _contains(set._inner, value);
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(Bytes32Set storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

   /**
    * @dev Returns the value stored at position `index` in the set. O(1).
    *
    * Note that there are no guarantees on the ordering of values inside the
    * array, and it may change when more values are added or removed.
    *
    * Requirements:
    *
    * - `index` must be strictly less than {length}.
    */
    function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
        return _at(set._inner, index);
    }

    // AddressSet

    struct AddressSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(AddressSet storage set, address value) internal returns (bool) {
        return _add(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(AddressSet storage set, address value) internal returns (bool) {
        return _remove(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(AddressSet storage set, address value) internal view returns (bool) {
        return _contains(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(AddressSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

   /**
    * @dev Returns the value stored at position `index` in the set. O(1).
    *
    * Note that there are no guarantees on the ordering of values inside the
    * array, and it may change when more values are added or removed.
    *
    * Requirements:
    *
    * - `index` must be strictly less than {length}.
    */
    function at(AddressSet storage set, uint256 index) internal view returns (address) {
        return address(uint160(uint256(_at(set._inner, index))));
    }


    // UintSet

    struct UintSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(UintSet storage set, uint256 value) internal returns (bool) {
        return _add(set._inner, bytes32(value));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(UintSet storage set, uint256 value) internal returns (bool) {
        return _remove(set._inner, bytes32(value));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(UintSet storage set, uint256 value) internal view returns (bool) {
        return _contains(set._inner, bytes32(value));
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function length(UintSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

   /**
    * @dev Returns the value stored at position `index` in the set. O(1).
    *
    * Note that there are no guarantees on the ordering of values inside the
    * array, and it may change when more values are added or removed.
    *
    * Requirements:
    *
    * - `index` must be strictly less than {length}.
    */
    function at(UintSet storage set, uint256 index) internal view returns (uint256) {
        return uint256(_at(set._inner, index));
    }
}

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





/**
 * @dev Library for managing an enumerable variant of Solidity's
 * https://solidity.readthedocs.io/en/latest/types.html#mapping-types[`mapping`]
 * type.
 *
 * Maps have the following properties:
 *
 * - Entries are added, removed, and checked for existence in constant time
 * (O(1)).
 * - Entries are enumerated in O(n). No guarantees are made on the ordering.
 *
 * ```
 * contract Example {
 *     // Add the library methods
 *     using EnumerableMap for EnumerableMap.UintToAddressMap;
 *
 *     // Declare a set state variable
 *     EnumerableMap.UintToAddressMap private myMap;
 * }
 * ```
 *
 * As of v3.0.0, only maps of type `uint256 -> address` (`UintToAddressMap`) are
 * supported.
 */
library EnumerableMap {
    // To implement this library for multiple types with as little code
    // repetition as possible, we write it in terms of a generic Map type with
    // bytes32 keys and values.
    // The Map implementation uses private functions, and user-facing
    // implementations (such as Uint256ToAddressMap) are just wrappers around
    // the underlying Map.
    // This means that we can only create new EnumerableMaps for types that fit
    // in bytes32.

    struct MapEntry {
        bytes32 _key;
        bytes32 _value;
    }

    struct Map {
        // Storage of map keys and values
        MapEntry[] _entries;

        // Position of the entry defined by a key in the `entries` array, plus 1
        // because index 0 means a key is not in the map.
        mapping (bytes32 => uint256) _indexes;
    }

    /**
     * @dev Adds a key-value pair to a map, or updates the value for an existing
     * key. O(1).
     *
     * Returns true if the key was added to the map, that is if it was not
     * already present.
     */
    function _set(Map storage map, bytes32 key, bytes32 value) private returns (bool) {
        // We read and store the key's index to prevent multiple reads from the same storage slot
        uint256 keyIndex = map._indexes[key];

        if (keyIndex == 0) { // Equivalent to !contains(map, key)
            map._entries.push(MapEntry({ _key: key, _value: value }));
            // The entry is stored at length-1, but we add 1 to all indexes
            // and use 0 as a sentinel value
            map._indexes[key] = map._entries.length;
            return true;
        } else {
            map._entries[keyIndex - 1]._value = value;
            return false;
        }
    }

    /**
     * @dev Removes a key-value pair from a map. O(1).
     *
     * Returns true if the key was removed from the map, that is if it was present.
     */
    function _remove(Map storage map, bytes32 key) private returns (bool) {
        // We read and store the key's index to prevent multiple reads from the same storage slot
        uint256 keyIndex = map._indexes[key];

        if (keyIndex != 0) { // Equivalent to contains(map, key)
            // To delete a key-value pair from the _entries array in O(1), we swap the entry to delete with the last one
            // in the array, and then remove the last entry (sometimes called as 'swap and pop').
            // This modifies the order of the array, as noted in {at}.

            uint256 toDeleteIndex = keyIndex - 1;
            uint256 lastIndex = map._entries.length - 1;

            // When the entry to delete is the last one, the swap operation is unnecessary. However, since this occurs
            // so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement.

            MapEntry storage lastEntry = map._entries[lastIndex];

            // Move the last entry to the index where the entry to delete is
            map._entries[toDeleteIndex] = lastEntry;
            // Update the index for the moved entry
            map._indexes[lastEntry._key] = toDeleteIndex + 1; // All indexes are 1-based

            // Delete the slot where the moved entry was stored
            map._entries.pop();

            // Delete the index for the deleted slot
            delete map._indexes[key];

            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Returns true if the key is in the map. O(1).
     */
    function _contains(Map storage map, bytes32 key) private view returns (bool) {
        return map._indexes[key] != 0;
    }

    /**
     * @dev Returns the number of key-value pairs in the map. O(1).
     */
    function _length(Map storage map) private view returns (uint256) {
        return map._entries.length;
    }

   /**
    * @dev Returns the key-value pair stored at position `index` in the map. O(1).
    *
    * Note that there are no guarantees on the ordering of entries inside the
    * array, and it may change when more entries are added or removed.
    *
    * Requirements:
    *
    * - `index` must be strictly less than {length}.
    */
    function _at(Map storage map, uint256 index) private view returns (bytes32, bytes32) {
        require(map._entries.length > index, "EnumerableMap: index out of bounds");

        MapEntry storage entry = map._entries[index];
        return (entry._key, entry._value);
    }

    /**
     * @dev Tries to returns the value associated with `key`.  O(1).
     * Does not revert if `key` is not in the map.
     */
    function _tryGet(Map storage map, bytes32 key) private view returns (bool, bytes32) {
        uint256 keyIndex = map._indexes[key];
        if (keyIndex == 0) return (false, 0); // Equivalent to contains(map, key)
        return (true, map._entries[keyIndex - 1]._value); // All indexes are 1-based
    }

    /**
     * @dev Returns the value associated with `key`.  O(1).
     *
     * Requirements:
     *
     * - `key` must be in the map.
     */
    function _get(Map storage map, bytes32 key) private view returns (bytes32) {
        uint256 keyIndex = map._indexes[key];
        require(keyIndex != 0, "EnumerableMap: nonexistent key"); // Equivalent to contains(map, key)
        return map._entries[keyIndex - 1]._value; // All indexes are 1-based
    }

    /**
     * @dev Same as {_get}, with a custom error message when `key` is not in the map.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {_tryGet}.
     */
    function _get(Map storage map, bytes32 key, string memory errorMessage) private view returns (bytes32) {
        uint256 keyIndex = map._indexes[key];
        require(keyIndex != 0, errorMessage); // Equivalent to contains(map, key)
        return map._entries[keyIndex - 1]._value; // All indexes are 1-based
    }

    // UintToAddressMap

    struct UintToAddressMap {
        Map _inner;
    }

    /**
     * @dev Adds a key-value pair to a map, or updates the value for an existing
     * key. O(1).
     *
     * Returns true if the key was added to the map, that is if it was not
     * already present.
     */
    function set(UintToAddressMap storage map, uint256 key, address value) internal returns (bool) {
        return _set(map._inner, bytes32(key), bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the key was removed from the map, that is if it was present.
     */
    function remove(UintToAddressMap storage map, uint256 key) internal returns (bool) {
        return _remove(map._inner, bytes32(key));
    }

    /**
     * @dev Returns true if the key is in the map. O(1).
     */
    function contains(UintToAddressMap storage map, uint256 key) internal view returns (bool) {
        return _contains(map._inner, bytes32(key));
    }

    /**
     * @dev Returns the number of elements in the map. O(1).
     */
    function length(UintToAddressMap storage map) internal view returns (uint256) {
        return _length(map._inner);
    }

   /**
    * @dev Returns the element stored at position `index` in the set. O(1).
    * Note that there are no guarantees on the ordering of values inside the
    * array, and it may change when more values are added or removed.
    *
    * Requirements:
    *
    * - `index` must be strictly less than {length}.
    */
    function at(UintToAddressMap storage map, uint256 index) internal view returns (uint256, address) {
        (bytes32 key, bytes32 value) = _at(map._inner, index);
        return (uint256(key), address(uint160(uint256(value))));
    }

    /**
     * @dev Tries to returns the value associated with `key`.  O(1).
     * Does not revert if `key` is not in the map.
     *
     * _Available since v3.4._
     */
    function tryGet(UintToAddressMap storage map, uint256 key) internal view returns (bool, address) {
        (bool success, bytes32 value) = _tryGet(map._inner, bytes32(key));
        return (success, address(uint160(uint256(value))));
    }

    /**
     * @dev Returns the value associated with `key`.  O(1).
     *
     * Requirements:
     *
     * - `key` must be in the map.
     */
    function get(UintToAddressMap storage map, uint256 key) internal view returns (address) {
        return address(uint160(uint256(_get(map._inner, bytes32(key)))));
    }

    /**
     * @dev Same as {get}, with a custom error message when `key` is not in the map.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryGet}.
     */
    function get(UintToAddressMap storage map, uint256 key, string memory errorMessage) internal view returns (address) {
        return address(uint160(uint256(_get(map._inner, bytes32(key), errorMessage))));
    }
}

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





/**
 * @dev String operations.
 */
library Strings {
    /**
     * @dev Converts a `uint256` to its ASCII `string` 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);
        uint256 index = digits - 1;
        temp = value;
        while (temp != 0) {
            buffer[index--] = bytes1(uint8(48 + temp % 10));
            temp /= 10;
        }
        return string(buffer);
    }
}

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
















/**
 * @title ERC721 Non-Fungible Token Standard basic implementation
 * @dev see https://eips.ethereum.org/EIPS/eip-721
 */
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata, IERC721Enumerable {
    using SafeMath for uint256;
    using Address for address;
    using EnumerableSet for EnumerableSet.UintSet;
    using EnumerableMap for EnumerableMap.UintToAddressMap;
    using Strings for uint256;

    // Equals to `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`
    // which can be also obtained as `IERC721Receiver(0).onERC721Received.selector`
    bytes4 private constant _ERC721_RECEIVED = 0x150b7a02;

    // Mapping from holder address to their (enumerable) set of owned tokens
    mapping (address => EnumerableSet.UintSet) private _holderTokens;

    // Enumerable mapping from token ids to their owners
    EnumerableMap.UintToAddressMap private _tokenOwners;

    // 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;

    // Token name
    string private _name;

    // Token symbol
    string private _symbol;

    // Optional mapping for token URIs
    mapping (uint256 => string) private _tokenURIs;

    // Base URI
    string private _baseURI;

    /*
     *     bytes4(keccak256('balanceOf(address)')) == 0x70a08231
     *     bytes4(keccak256('ownerOf(uint256)')) == 0x6352211e
     *     bytes4(keccak256('approve(address,uint256)')) == 0x095ea7b3
     *     bytes4(keccak256('getApproved(uint256)')) == 0x081812fc
     *     bytes4(keccak256('setApprovalForAll(address,bool)')) == 0xa22cb465
     *     bytes4(keccak256('isApprovedForAll(address,address)')) == 0xe985e9c5
     *     bytes4(keccak256('transferFrom(address,address,uint256)')) == 0x23b872dd
     *     bytes4(keccak256('safeTransferFrom(address,address,uint256)')) == 0x42842e0e
     *     bytes4(keccak256('safeTransferFrom(address,address,uint256,bytes)')) == 0xb88d4fde
     *
     *     => 0x70a08231 ^ 0x6352211e ^ 0x095ea7b3 ^ 0x081812fc ^
     *        0xa22cb465 ^ 0xe985e9c5 ^ 0x23b872dd ^ 0x42842e0e ^ 0xb88d4fde == 0x80ac58cd
     */
    bytes4 private constant _INTERFACE_ID_ERC721 = 0x80ac58cd;

    /*
     *     bytes4(keccak256('name()')) == 0x06fdde03
     *     bytes4(keccak256('symbol()')) == 0x95d89b41
     *     bytes4(keccak256('tokenURI(uint256)')) == 0xc87b56dd
     *
     *     => 0x06fdde03 ^ 0x95d89b41 ^ 0xc87b56dd == 0x5b5e139f
     */
    bytes4 private constant _INTERFACE_ID_ERC721_METADATA = 0x5b5e139f;

    /*
     *     bytes4(keccak256('totalSupply()')) == 0x18160ddd
     *     bytes4(keccak256('tokenOfOwnerByIndex(address,uint256)')) == 0x2f745c59
     *     bytes4(keccak256('tokenByIndex(uint256)')) == 0x4f6ccce7
     *
     *     => 0x18160ddd ^ 0x2f745c59 ^ 0x4f6ccce7 == 0x780e9d63
     */
    bytes4 private constant _INTERFACE_ID_ERC721_ENUMERABLE = 0x780e9d63;

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

        // register the supported interfaces to conform to ERC721 via ERC165
        _registerInterface(_INTERFACE_ID_ERC721);
        _registerInterface(_INTERFACE_ID_ERC721_METADATA);
        _registerInterface(_INTERFACE_ID_ERC721_ENUMERABLE);
    }

    /**
     * @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 _holderTokens[owner].length();
    }

    /**
     * @dev See {IERC721-ownerOf}.
     */
    function ownerOf(uint256 tokenId) public view virtual override returns (address) {
        return _tokenOwners.get(tokenId, "ERC721: owner query for nonexistent token");
    }

    /**
     * @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 _tokenURI = _tokenURIs[tokenId];
        string memory base = baseURI();

        // If there is no base URI, return the token URI.
        if (bytes(base).length == 0) {
            return _tokenURI;
        }
        // If both are set, concatenate the baseURI and tokenURI (via abi.encodePacked).
        if (bytes(_tokenURI).length > 0) {
            return string(abi.encodePacked(base, _tokenURI));
        }
        // If there is a baseURI but no tokenURI, concatenate the tokenID to the baseURI.
        return string(abi.encodePacked(base, tokenId.toString()));
    }

    /**
    * @dev Returns the base URI set via {_setBaseURI}. This will be
    * automatically added as a prefix in {tokenURI} to each token's URI, or
    * to the token ID if no specific URI is set for that token ID.
    */
    function baseURI() public view virtual returns (string memory) {
        return _baseURI;
    }

    /**
     * @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
     */
    function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) {
        return _holderTokens[owner].at(index);
    }

    /**
     * @dev See {IERC721Enumerable-totalSupply}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        // _tokenOwners are indexed by tokenIds, so .length() returns the number of tokenIds
        return _tokenOwners.length();
    }

    /**
     * @dev See {IERC721Enumerable-tokenByIndex}.
     */
    function tokenByIndex(uint256 index) public view virtual override returns (uint256) {
        (uint256 tokenId, ) = _tokenOwners.at(index);
        return tokenId;
    }

    /**
     * @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 || ERC721.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 _tokenOwners.contains(tokenId);
    }

    /**
     * @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 || ERC721.isApprovedForAll(owner, spender));
    }

    /**
     * @dev Safely mints `tokenId` and transfers it to `to`.
     *
     * Requirements:
     d*
     * - `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);

        _holderTokens[to].add(tokenId);

        _tokenOwners.set(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); // internal owner

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

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

        // Clear metadata (if any)
        if (bytes(_tokenURIs[tokenId]).length != 0) {
            delete _tokenURIs[tokenId];
        }

        _holderTokens[owner].remove(tokenId);

        _tokenOwners.remove(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"); // internal 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);

        _holderTokens[from].remove(tokenId);
        _holderTokens[to].add(tokenId);

        _tokenOwners.set(tokenId, to);

        emit Transfer(from, to, tokenId);
    }

    /**
     * @dev Sets `_tokenURI` as the tokenURI of `tokenId`.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function _setTokenURI(uint256 tokenId, string memory _tokenURI) internal virtual {
        require(_exists(tokenId), "ERC721Metadata: URI set of nonexistent token");
        _tokenURIs[tokenId] = _tokenURI;
    }

    /**
     * @dev Internal function to set the base URI for all token IDs. It is
     * automatically added as a prefix to the value returned in {tokenURI},
     * or to the token ID if {tokenURI} is empty.
     */
    function _setBaseURI(string memory baseURI_) internal virtual {
        _baseURI = baseURI_;
    }

    /**
     * @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()) {
            return true;
        }
        bytes memory returndata = to.functionCall(abi.encodeWithSelector(
            IERC721Receiver(to).onERC721Received.selector,
            _msgSender(),
            from,
            tokenId,
            _data
        ), "ERC721: transfer to non ERC721Receiver implementer");
        bytes4 retval = abi.decode(returndata, (bytes4));
        return (retval == _ERC721_RECEIVED);
    }

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

    /**
     * @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 { }
}

// File: @openzeppelin/contracts/access/Ownable.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 () internal {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), 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 {
        emit OwnershipTransferred(_owner, address(0));
        _owner = 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");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}

// MerkleProof
// https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v3.4.0/contracts/cryptography/MerkleProof.sol

/**
 * @dev These functions deal with verification of Merkle trees (hash trees),
 */
library MerkleProof {
    /**
     * @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
     * defined by `root`. For this, a `proof` must be provided, containing
     * sibling hashes on the branch from the leaf to the root of the tree. Each
     * pair of leaves and each pair of pre-images are assumed to be sorted.
     */
    function verify(bytes32[] memory proof, bytes32 root, bytes32 leaf) internal pure returns (bool) {
        bytes32 computedHash = leaf;

        for (uint256 i = 0; i < proof.length; i++) {
            bytes32 proofElement = proof[i];

            if (computedHash <= proofElement) {
                // Hash(current computed hash + current element of the proof)
                computedHash = keccak256(abi.encodePacked(computedHash, proofElement));
            } else {
                // Hash(current element of the proof + current computed hash)
                computedHash = keccak256(abi.encodePacked(proofElement, computedHash));
            }
        }

        // Check if the computed hash (root) is equal to the provided root
        return computedHash == root;
    }
}
interface IERC20 {
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
    function transfer(address recipient, uint256 amount) external returns (bool);
    function balanceOf(address account) external view returns (uint256);
}
/**
 * @title AWSBNFT contract
 * @dev Extends ERC721 Non-Fungible Token Standard basic implementation
 */
contract AWSBNFT is ERC721, Ownable {
    using SafeMath for uint256;
    address constant PEOPLE_CONTRACT = 0x7A58c0Be72BE218B41C608b7Fe7C5bB630736C71;
    uint256 constant MINT_PRICE = 10**18;
    uint256 public constant MAX_SUPPLY = 588;
    uint256 public saleIsActive = 0;
    bytes32 public merkleRoot;
    mapping(address => bool) public purchaseAddress;
    mapping(address => bool) public purchasePublicAddress;

    constructor() ERC721("aWSB Genesis 2021", "aWSB") {}

    function setBaseURI(string memory baseURI) public onlyOwner {
        _setBaseURI(baseURI);
    }

    /*
    * Pause sale if active, make active if paused
    */
    function flipSaleState(uint256 _saleIsActive) public onlyOwner {
        saleIsActive = _saleIsActive;
    }

    function setMerkleRoot(bytes32 _merkleRoot) external onlyOwner {
        merkleRoot = _merkleRoot;
    }

    function pullFunds(address tokenAddress_) external onlyOwner{
        if (tokenAddress_ == address(0)) {
            payable(_msgSender()).transfer(address(this).balance);
        } else {
            IERC20 token = IERC20(tokenAddress_);
            token.transfer(_msgSender(), token.balanceOf(address(this)));
        }
    }

    /**
    * Mint
    */
    function mint(bytes32[] calldata merkleProof) external {
        require(saleIsActive > 0, "Sale must be active to mint");
        require(!purchaseAddress[msg.sender], "Address has already minted");
        uint mintIndex = totalSupply();
        require(mintIndex < MAX_SUPPLY, "Purchase would exceed max supply");
        bytes32 leaf = keccak256(abi.encodePacked(msg.sender));
        require(
            MerkleProof.verify(merkleProof, merkleRoot, leaf),
            "Address was not in allowList"
        );
        purchaseAddress[msg.sender] = true;
        IERC20(PEOPLE_CONTRACT).transferFrom(msg.sender, address(this), MINT_PRICE);
        _safeMint(msg.sender, mintIndex);
    }

    /**
    * Public Mint
    */
    function publicMint() external {
        require(saleIsActive > 1, "Sale must be active to mint");
        require(!purchasePublicAddress[msg.sender], "Address has already minted");
        uint mintIndex = totalSupply();
        require(mintIndex < MAX_SUPPLY, "Purchase would exceed max supply");
        purchasePublicAddress[msg.sender] = true;
        IERC20(PEOPLE_CONTRACT).transferFrom(msg.sender, address(this), MINT_PRICE);
        _safeMint(msg.sender, mintIndex);
    }
}

{
  "evmVersion": "istanbul",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs",
    "useLiteralContent": true
  },
  "optimizer": {
    "enabled": true,
    "runs": 2000
  },
  "remappings": [],
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[],"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":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","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"},{"inputs":[],"name":"MAX_SUPPLY","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"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":[],"name":"baseURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_saleIsActive","type":"uint256"}],"name":"flipSaleState","outputs":[],"stateMutability":"nonpayable","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":"merkleRoot","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32[]","name":"merkleProof","type":"bytes32[]"}],"name":"mint","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"ownerOf","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"publicMint","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"tokenAddress_","type":"address"}],"name":"pullFunds","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"purchaseAddress","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"purchasePublicAddress","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"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":[],"name":"saleIsActive","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"operator","type":"address"},{"internalType":"bool","name":"approved","type":"bool"}],"name":"setApprovalForAll","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"baseURI","type":"string"}],"name":"setBaseURI","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"_merkleRoot","type":"bytes32"}],"name":"setMerkleRoot","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":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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