Contract Source Code (Solidity Standard Json-Input format)

IDE

• Blockscan IDE
• 🤖 Code ReaderBeta
• Remix IDE

More Options

• Similar
• Sol2Uml
• Submit Audit
• Compare

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.2;

import "@openzeppelin/contracts/utils/Context.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
import "@openzeppelin/contracts/security/Pausable.sol";
import './ERC721A.sol';

abstract contract EWALKS is IERC721 {}

contract ETHWalkersPortstown is ERC721A, Ownable, ReentrancyGuard, Pausable {
    using Address for address;
    using Strings for uint256;

    EWALKS private ewalk;
    uint public preSale = 1655316000; // 6/15 at 11am PDT
    uint public publicSale = 1655359200; // 6/15 at 11pm PDT
    uint public endSale = 1655445600; // 6/16 at 11pm PDT
    uint16 public mintedTokenCount = 0;
    string public baseURI;
    mapping(uint256 => bool) walkerRedeemed;
    mapping(address => uint8) numberMinted;
    address public whitelistSigner = 0xCcCCccccCCCCcCCCCCCcCcCccCcCCCcCcccccccC;

    constructor() ERC721A("ETH Walkers Portstown", "EWPortstown") {
        address EwalksAddress = 0x4691b302c37B53c68093f1F5490711d3B0CD2b9C;
        ewalk = EWALKS(EwalksAddress);
    }

    function getMintRedeemed(uint256 _id) public view returns (bool){
        return walkerRedeemed[_id];
    }

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

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

    function setSaleTimes(uint[] memory _newTimes) external onlyOwner {
        require(_newTimes.length == 3, "You need to update all times at once");
        preSale = _newTimes[0];
        publicSale = _newTimes[1];
        endSale = _newTimes[2];
    }

    function setSignerAddress(address signer) public onlyOwner {
        whitelistSigner = signer;
    }

    function portstownSeasonOneClaim(uint256[] memory ids) external whenNotPaused {
        // ids is an array of seasonOne tokenIds
        require(block.timestamp >= preSale && block.timestamp <= endSale, "Pre-sale must be started");
        require(!isContract(msg.sender), "I fight for the user! No contracts");

        for(uint i = 0; i < ids.length; i++) {
            require(ewalk.ownerOf(ids[i]) == msg.sender, "Must own a ETH Walker to mint free Portstown");
            require(!walkerRedeemed[ids[i]], "This ETH Walker already redeemed for mint");
            walkerRedeemed[ids[i]] = true;
        }

        _mint(_msgSender(), ids.length);
    }

    //Constants for signing whitelist
    bytes32 constant DOMAIN_SEPERATOR = keccak256(abi.encode(
        keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"),
        keccak256("Signer NFT Distributor"),
        keccak256("1"),
        uint256(1),
        address(0xCcCCccccCCCCcCCCCCCcCcCccCcCCCcCcccccccC)
    ));

    bytes32 constant ENTRY_TYPEHASH = keccak256("Entry(uint256 index,address wallet)");

    function presaleMintETHWalkersPortstown(uint8 numberOfTokens, uint index, bytes memory signature) external whenNotPaused {
        require(block.timestamp >= preSale && block.timestamp <= endSale, "Pre-sale must be started");
        require(numberMinted[_msgSender()] + numberOfTokens <= 4, "Max of 4 ETH Walkers Portstown per wallet");
        require(!isContract(msg.sender), "I fight for the user! No contracts");

        // verify signature
        bytes32 digest = keccak256(abi.encodePacked(
            "\x19\x01",
            DOMAIN_SEPERATOR,
            keccak256(abi.encode(
                ENTRY_TYPEHASH,
                index, 
                _msgSender()
            ))
        ));
        address claimSigner = ECDSA.recover(digest, signature);
        require(claimSigner == whitelistSigner, "Invalid Message Signer.");

        _mint(_msgSender(), numberOfTokens);
        numberMinted[_msgSender()] += numberOfTokens;
    }

    function publicMintETHWalkersPortstown(uint8 numberOfTokens) external whenNotPaused {
        require(block.timestamp >= publicSale && block.timestamp <= endSale, "Public sale not started");
        require(numberMinted[_msgSender()] + numberOfTokens <= 4, "Max of 4 ETH Walkers Portstown per wallet");
        require(!isContract(msg.sender), "I fight for the user! No contracts");

        _mint(_msgSender(), numberOfTokens);
        numberMinted[_msgSender()] += numberOfTokens;
        mintedTokenCount = mintedTokenCount + numberOfTokens;
    }

    function isContract(address _addr) private view returns (bool){
        uint32 size;
        assembly {
            size := extcodesize(_addr)
        }
        return (size > 0);
    }

    function setPaused(bool _paused) external onlyOwner {
        if (_paused) _pause();
        else _unpause();
    }

    function tokensOfOwner(address _owner) external view returns(uint256[] memory ) {
        uint256 tokenCount = balanceOf(_owner);
        if (tokenCount == 0) {
            return new uint256[](0);
        } else {
            uint256[] memory result = new uint256[](tokenCount);
            uint256 index;
            uint256 current_token = 0;
            for (index = 0; index < totalSupply() && current_token < tokenCount; index++) {
                if (ownerOf(index) == _owner){
                    result[current_token] = index;
                    current_token++;
                }
            }
            return result;
        }
    }

}

// SPDX-License-Identifier: MIT
// 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;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/Context.sol";

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

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (utils/math/SafeMath.sol)

pragma solidity ^0.8.0;

// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.

/**
 * @dev Wrappers over Solidity's arithmetic operations.
 *
 * NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler
 * now has built in overflow checking.
 */
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) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            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) {
        unchecked {
            // 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) {
        unchecked {
            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) {
        unchecked {
            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) {
        return a + b;
    }

    /**
     * @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) {
        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) {
        return a * b;
    }

    /**
     * @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.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        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) {
        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) {
        unchecked {
            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.
     *
     * 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) {
        unchecked {
            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) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}

// SPDX-License-Identifier: MIT
// 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;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721.sol)

pragma solidity ^0.8.0;

import "../../utils/introspection/IERC165.sol";

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

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

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

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

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

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`.
     *
     * 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;

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

    /**
     * @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);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/cryptography/ECDSA.sol)

pragma solidity ^0.8.0;

import "../Strings.sol";

/**
 * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
 *
 * These functions can be used to verify that a message was signed by the holder
 * of the private keys of a given address.
 */
library ECDSA {
    enum RecoverError {
        NoError,
        InvalidSignature,
        InvalidSignatureLength,
        InvalidSignatureS,
        InvalidSignatureV
    }

    function _throwError(RecoverError error) private pure {
        if (error == RecoverError.NoError) {
            return; // no error: do nothing
        } else if (error == RecoverError.InvalidSignature) {
            revert("ECDSA: invalid signature");
        } else if (error == RecoverError.InvalidSignatureLength) {
            revert("ECDSA: invalid signature length");
        } else if (error == RecoverError.InvalidSignatureS) {
            revert("ECDSA: invalid signature 's' value");
        } else if (error == RecoverError.InvalidSignatureV) {
            revert("ECDSA: invalid signature 'v' value");
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature` or error string. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     *
     * Documentation for signature generation:
     * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
     * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
     *
     * _Available since v4.3._
     */
    function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {
        // Check the signature length
        // - case 65: r,s,v signature (standard)
        // - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._
        if (signature.length == 65) {
            bytes32 r;
            bytes32 s;
            uint8 v;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            assembly {
                r := mload(add(signature, 0x20))
                s := mload(add(signature, 0x40))
                v := byte(0, mload(add(signature, 0x60)))
            }
            return tryRecover(hash, v, r, s);
        } else if (signature.length == 64) {
            bytes32 r;
            bytes32 vs;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            assembly {
                r := mload(add(signature, 0x20))
                vs := mload(add(signature, 0x40))
            }
            return tryRecover(hash, r, vs);
        } else {
            return (address(0), RecoverError.InvalidSignatureLength);
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature`. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     */
    function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, signature);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
     *
     * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
     *
     * _Available since v4.3._
     */
    function tryRecover(
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal pure returns (address, RecoverError) {
        bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);
        uint8 v = uint8((uint256(vs) >> 255) + 27);
        return tryRecover(hash, v, r, s);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
     *
     * _Available since v4.2._
     */
    function recover(
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, r, vs);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `v`,
     * `r` and `s` signature fields separately.
     *
     * _Available since v4.3._
     */
    function tryRecover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address, RecoverError) {
        // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
        // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
        // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
        // signatures from current libraries generate a unique signature with an s-value in the lower half order.
        //
        // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
        // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
        // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
        // these malleable signatures as well.
        if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
            return (address(0), RecoverError.InvalidSignatureS);
        }
        if (v != 27 && v != 28) {
            return (address(0), RecoverError.InvalidSignatureV);
        }

        // If the signature is valid (and not malleable), return the signer address
        address signer = ecrecover(hash, v, r, s);
        if (signer == address(0)) {
            return (address(0), RecoverError.InvalidSignature);
        }

        return (signer, RecoverError.NoError);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `v`,
     * `r` and `s` signature fields separately.
     */
    function recover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, v, r, s);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from a `hash`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
        // 32 is the length in bytes of hash,
        // enforced by the type signature above
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from `s`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s));
    }

    /**
     * @dev Returns an Ethereum Signed Typed Data, created from a
     * `domainSeparator` and a `structHash`. This produces hash corresponding
     * to the one signed with the
     * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
     * JSON-RPC method as part of EIP-712.
     *
     * See {recover}.
     */
    function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (security/Pausable.sol)

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @dev Contract module which allows children to implement an emergency stop
 * mechanism that can be triggered by an authorized account.
 *
 * This module is used through inheritance. It will make available the
 * modifiers `whenNotPaused` and `whenPaused`, which can be applied to
 * the functions of your contract. Note that they will not be pausable by
 * simply including this module, only once the modifiers are put in place.
 */
abstract contract Pausable is Context {
    /**
     * @dev Emitted when the pause is triggered by `account`.
     */
    event Paused(address account);

    /**
     * @dev Emitted when the pause is lifted by `account`.
     */
    event Unpaused(address account);

    bool private _paused;

    /**
     * @dev Initializes the contract in unpaused state.
     */
    constructor() {
        _paused = false;
    }

    /**
     * @dev Returns true if the contract is paused, and false otherwise.
     */
    function paused() public view virtual returns (bool) {
        return _paused;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is not paused.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    modifier whenNotPaused() {
        require(!paused(), "Pausable: paused");
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    modifier whenPaused() {
        require(paused(), "Pausable: not paused");
        _;
    }

    /**
     * @dev Triggers stopped state.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    function _pause() internal virtual whenNotPaused {
        _paused = true;
        emit Paused(_msgSender());
    }

    /**
     * @dev Returns to normal state.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    function _unpause() internal virtual whenPaused {
        _paused = false;
        emit Unpaused(_msgSender());
    }
}

// SPDX-License-Identifier: MIT
// Creator: Chiru Labs

pragma solidity ^0.8.4;

import './IERC721A.sol';
import '@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol';
import '@openzeppelin/contracts/utils/Address.sol';
import '@openzeppelin/contracts/utils/Context.sol';
import '@openzeppelin/contracts/utils/Strings.sol';
import '@openzeppelin/contracts/utils/introspection/ERC165.sol';

/**
 * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
 * the Metadata extension. Built to optimize for lower gas during batch mints.
 *
 * Assumes serials are sequentially minted starting at _startTokenId() (defaults to 0, e.g. 0, 1, 2, 3..).
 *
 * Assumes that an owner cannot have more than 2**64 - 1 (max value of uint64) of supply.
 *
 * Assumes that the maximum token id cannot exceed 2**256 - 1 (max value of uint256).
 */
contract ERC721A is Context, ERC165, IERC721A {
    using Address for address;
    using Strings for uint256;

    // The tokenId of the next token to be minted.
    uint256 internal _currentIndex;

    // The number of tokens burned.
    uint256 internal _burnCounter;

    // Token name
    string private _name;

    // Token symbol
    string private _symbol;

    // Mapping from token ID to ownership details
    // An empty struct value does not necessarily mean the token is unowned. See _ownershipOf implementation for details.
    mapping(uint256 => TokenOwnership) internal _ownerships;

    // Mapping owner address to address data
    mapping(address => AddressData) private _addressData;

    // 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;

    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
        _currentIndex = _startTokenId();
    }

    /**
     * To change the starting tokenId, please override this function.
     */
    function _startTokenId() internal view virtual returns (uint256) {
        return 0;
    }

    /**
     * @dev Burned tokens are calculated here, use _totalMinted() if you want to count just minted tokens.
     */
    function totalSupply() override public view returns (uint256) {
        // Counter underflow is impossible as _burnCounter cannot be incremented
        // more than _currentIndex - _startTokenId() times
    unchecked {
        return _currentIndex - _burnCounter - _startTokenId();
    }
    }

    /**
     * Returns the total amount of tokens minted in the contract.
     */
    function _totalMinted() internal view returns (uint256) {
        // Counter underflow is impossible as _currentIndex does not decrement,
        // and it is initialized to _startTokenId()
    unchecked {
        return _currentIndex - _startTokenId();
    }
    }

    /**
     * @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 override returns (uint256) {
        if (owner == address(0)) revert BalanceQueryForZeroAddress();
        return uint256(_addressData[owner].balance);
    }

    /**
     * Returns the number of tokens minted by `owner`.
     */
    function _numberMinted(address owner) internal view returns (uint256) {
        return uint256(_addressData[owner].numberMinted);
    }

    /**
     * Returns the number of tokens burned by or on behalf of `owner`.
     */
    function _numberBurned(address owner) internal view returns (uint256) {
        return uint256(_addressData[owner].numberBurned);
    }

    /**
     * Returns the auxillary data for `owner`. (e.g. number of whitelist mint slots used).
     */
    function _getAux(address owner) internal view returns (uint64) {
        return _addressData[owner].aux;
    }

    /**
     * Sets the auxillary data for `owner`. (e.g. number of whitelist mint slots used).
     * If there are multiple variables, please pack them into a uint64.
     */
    function _setAux(address owner, uint64 aux) internal {
        _addressData[owner].aux = aux;
    }

    /**
     * Gas spent here starts off proportional to the maximum mint batch size.
     * It gradually moves to O(1) as tokens get transferred around in the collection over time.
     */
    function _ownershipOf(uint256 tokenId) internal view returns (TokenOwnership memory) {
        uint256 curr = tokenId;

    unchecked {
        if (_startTokenId() <= curr && curr < _currentIndex) {
            TokenOwnership memory ownership = _ownerships[curr];
            if (!ownership.burned) {
                if (ownership.addr != address(0)) {
                    return ownership;
                }
                // Invariant:
                // There will always be an ownership that has an address and is not burned
                // before an ownership that does not have an address and is not burned.
                // Hence, curr will not underflow.
                while (true) {
                    curr--;
                    ownership = _ownerships[curr];
                    if (ownership.addr != address(0)) {
                        return ownership;
                    }
                }
            }
        }
    }
        revert OwnerQueryForNonexistentToken();
    }

    /**
     * @dev See {IERC721-ownerOf}.
     */
    function ownerOf(uint256 tokenId) public view override returns (address) {
        return _ownershipOf(tokenId).addr;
    }

    /**
     * @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) {
        if (!_exists(tokenId)) revert URIQueryForNonexistentToken();

        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 override {
        address owner = ERC721A.ownerOf(tokenId);
        if (to == owner) revert ApprovalToCurrentOwner();

        if (_msgSender() != owner && !isApprovedForAll(owner, _msgSender())) {
            revert ApprovalCallerNotOwnerNorApproved();
        }

        _approve(to, tokenId, owner);
    }

    /**
     * @dev See {IERC721-getApproved}.
     */
    function getApproved(uint256 tokenId) public view override returns (address) {
        if (!_exists(tokenId)) revert ApprovalQueryForNonexistentToken();

        return _tokenApprovals[tokenId];
    }

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

        _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 {
        _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 {
        _transfer(from, to, tokenId);
        if (to.isContract() && !_checkContractOnERC721Received(from, to, tokenId, _data)) {
            revert TransferToNonERC721ReceiverImplementer();
        }
    }

    /**
     * @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`),
     */
    function _exists(uint256 tokenId) internal view returns (bool) {
        return _startTokenId() <= tokenId && tokenId < _currentIndex && !_ownerships[tokenId].burned;
    }

    /**
     * @dev Equivalent to `_safeMint(to, quantity, '')`.
     */
    function _safeMint(address to, uint256 quantity) internal {
        _safeMint(to, quantity, '');
    }

    /**
     * @dev Safely mints `quantity` tokens and transfers them to `to`.
     *
     * Requirements:
     *
     * - If `to` refers to a smart contract, it must implement
     *   {IERC721Receiver-onERC721Received}, which is called for each safe transfer.
     * - `quantity` must be greater than 0.
     *
     * Emits a {Transfer} event.
     */
    function _safeMint(
        address to,
        uint256 quantity,
        bytes memory _data
    ) internal {
        uint256 startTokenId = _currentIndex;
        if (to == address(0)) revert MintToZeroAddress();
        if (quantity == 0) revert MintZeroQuantity();

        _beforeTokenTransfers(address(0), to, startTokenId, quantity);

        // Overflows are incredibly unrealistic.
        // balance or numberMinted overflow if current value of either + quantity > 1.8e19 (2**64) - 1
        // updatedIndex overflows if _currentIndex + quantity > 1.2e77 (2**256) - 1
    unchecked {
        _addressData[to].balance += uint64(quantity);
        _addressData[to].numberMinted += uint64(quantity);

        _ownerships[startTokenId].addr = to;
        _ownerships[startTokenId].startTimestamp = uint64(block.timestamp);

        uint256 updatedIndex = startTokenId;
        uint256 end = updatedIndex + quantity;

        if (to.isContract()) {
            do {
                emit Transfer(address(0), to, updatedIndex);
                if (!_checkContractOnERC721Received(address(0), to, updatedIndex++, _data)) {
                    revert TransferToNonERC721ReceiverImplementer();
                }
            } while (updatedIndex != end);
            // Reentrancy protection
            if (_currentIndex != startTokenId) revert();
        } else {
            do {
                emit Transfer(address(0), to, updatedIndex++);
            } while (updatedIndex != end);
        }
        _currentIndex = updatedIndex;
    }
        _afterTokenTransfers(address(0), to, startTokenId, quantity);
    }

    /**
     * @dev Mints `quantity` tokens and transfers them to `to`.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - `quantity` must be greater than 0.
     *
     * Emits a {Transfer} event.
     */
    function _mint(address to, uint256 quantity) internal {
        uint256 startTokenId = _currentIndex;
        if (to == address(0)) revert MintToZeroAddress();
        if (quantity == 0) revert MintZeroQuantity();

        _beforeTokenTransfers(address(0), to, startTokenId, quantity);

        // Overflows are incredibly unrealistic.
        // balance or numberMinted overflow if current value of either + quantity > 1.8e19 (2**64) - 1
        // updatedIndex overflows if _currentIndex + quantity > 1.2e77 (2**256) - 1
    unchecked {
        _addressData[to].balance += uint64(quantity);
        _addressData[to].numberMinted += uint64(quantity);

        _ownerships[startTokenId].addr = to;
        _ownerships[startTokenId].startTimestamp = uint64(block.timestamp);

        uint256 updatedIndex = startTokenId;
        uint256 end = updatedIndex + quantity;

        do {
            emit Transfer(address(0), to, updatedIndex++);
        } while (updatedIndex != end);

        _currentIndex = updatedIndex;
    }
        _afterTokenTransfers(address(0), to, startTokenId, quantity);
    }

    /**
     * @dev Transfers `tokenId` from `from` to `to`.
     *
     * 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
    ) private {
        TokenOwnership memory prevOwnership = _ownershipOf(tokenId);

        if (prevOwnership.addr != from) revert TransferFromIncorrectOwner();

        bool isApprovedOrOwner = (_msgSender() == from ||
        isApprovedForAll(from, _msgSender()) ||
        getApproved(tokenId) == _msgSender());

        if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved();
        if (to == address(0)) revert TransferToZeroAddress();

        _beforeTokenTransfers(from, to, tokenId, 1);

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

        // Underflow of the sender's balance is impossible because we check for
        // ownership above and the recipient's balance can't realistically overflow.
        // Counter overflow is incredibly unrealistic as tokenId would have to be 2**256.
    unchecked {
        _addressData[from].balance -= 1;
        _addressData[to].balance += 1;

        TokenOwnership storage currSlot = _ownerships[tokenId];
        currSlot.addr = to;
        currSlot.startTimestamp = uint64(block.timestamp);

        // If the ownership slot of tokenId+1 is not explicitly set, that means the transfer initiator owns it.
        // Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.
        uint256 nextTokenId = tokenId + 1;
        TokenOwnership storage nextSlot = _ownerships[nextTokenId];
        if (nextSlot.addr == address(0)) {
            // This will suffice for checking _exists(nextTokenId),
            // as a burned slot cannot contain the zero address.
            if (nextTokenId != _currentIndex) {
                nextSlot.addr = from;
                nextSlot.startTimestamp = prevOwnership.startTimestamp;
            }
        }
    }

        emit Transfer(from, to, tokenId);
        _afterTokenTransfers(from, to, tokenId, 1);
    }

    /**
     * @dev Equivalent to `_burn(tokenId, false)`.
     */
    function _burn(uint256 tokenId) internal virtual {
        _burn(tokenId, false);
    }

    /**
     * @dev Destroys `tokenId`.
     * The approval is cleared when the token is burned.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     *
     * Emits a {Transfer} event.
     */
    function _burn(uint256 tokenId, bool approvalCheck) internal virtual {
        TokenOwnership memory prevOwnership = _ownershipOf(tokenId);

        address from = prevOwnership.addr;

        if (approvalCheck) {
            bool isApprovedOrOwner = (_msgSender() == from ||
            isApprovedForAll(from, _msgSender()) ||
            getApproved(tokenId) == _msgSender());

            if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved();
        }

        _beforeTokenTransfers(from, address(0), tokenId, 1);

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

        // Underflow of the sender's balance is impossible because we check for
        // ownership above and the recipient's balance can't realistically overflow.
        // Counter overflow is incredibly unrealistic as tokenId would have to be 2**256.
    unchecked {
        AddressData storage addressData = _addressData[from];
        addressData.balance -= 1;
        addressData.numberBurned += 1;

        // Keep track of who burned the token, and the timestamp of burning.
        TokenOwnership storage currSlot = _ownerships[tokenId];
        currSlot.addr = from;
        currSlot.startTimestamp = uint64(block.timestamp);
        currSlot.burned = true;

        // If the ownership slot of tokenId+1 is not explicitly set, that means the burn initiator owns it.
        // Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.
        uint256 nextTokenId = tokenId + 1;
        TokenOwnership storage nextSlot = _ownerships[nextTokenId];
        if (nextSlot.addr == address(0)) {
            // This will suffice for checking _exists(nextTokenId),
            // as a burned slot cannot contain the zero address.
            if (nextTokenId != _currentIndex) {
                nextSlot.addr = from;
                nextSlot.startTimestamp = prevOwnership.startTimestamp;
            }
        }
    }

        emit Transfer(from, address(0), tokenId);
        _afterTokenTransfers(from, address(0), tokenId, 1);

        // Overflow not possible, as _burnCounter cannot be exceed _currentIndex times.
    unchecked {
        _burnCounter++;
    }
    }

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

    /**
     * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target 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 _checkContractOnERC721Received(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) private returns (bool) {
        try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
            return retval == IERC721Receiver(to).onERC721Received.selector;
        } catch (bytes memory reason) {
            if (reason.length == 0) {
                revert TransferToNonERC721ReceiverImplementer();
            } else {
                assembly {
                    revert(add(32, reason), mload(reason))
                }
            }
        }
    }

    /**
     * @dev Hook that is called before a set of serially-ordered token ids are about to be transferred. This includes minting.
     * And also called before burning one token.
     *
     * startTokenId - the first token id to be transferred
     * quantity - the amount to be transferred
     *
     * 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, `tokenId` will be burned by `from`.
     * - `from` and `to` are never both zero.
     */
    function _beforeTokenTransfers(
        address from,
        address to,
        uint256 startTokenId,
        uint256 quantity
    ) internal virtual {}

    /**
     * @dev Hook that is called after a set of serially-ordered token ids have been transferred. This includes
     * minting.
     * And also called after one token has been burned.
     *
     * startTokenId - the first token id to be transferred
     * quantity - the amount to be transferred
     *
     * Calling conditions:
     *
     * - When `from` and `to` are both non-zero, `from`'s `tokenId` has been
     * transferred to `to`.
     * - When `from` is zero, `tokenId` has been minted for `to`.
     * - When `to` is zero, `tokenId` has been burned by `from`.
     * - `from` and `to` are never both zero.
     */
    function _afterTokenTransfers(
        address from,
        address to,
        uint256 startTokenId,
        uint256 quantity
    ) internal virtual {}
}

// SPDX-License-Identifier: MIT
// 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);
}

// SPDX-License-Identifier: MIT
// 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);
    }
}

// SPDX-License-Identifier: MIT
// Creator: Chiru Labs

pragma solidity ^0.8.4;

import '@openzeppelin/contracts/token/ERC721/IERC721.sol';
import '@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol';

/**
 * @dev Interface of an ERC721A compliant contract.
 */
interface IERC721A is IERC721, IERC721Metadata {
    error ApprovalCallerNotOwnerNorApproved();
    error ApprovalQueryForNonexistentToken();
    error ApproveToCaller();
    error ApprovalToCurrentOwner();
    error BalanceQueryForZeroAddress();
    error MintToZeroAddress();
    error MintZeroQuantity();
    error OwnerQueryForNonexistentToken();
    error TransferCallerNotOwnerNorApproved();
    error TransferFromIncorrectOwner();
    error TransferToNonERC721ReceiverImplementer();
    error TransferToZeroAddress();
    error URIQueryForNonexistentToken();

    // Compiler will pack this into a single 256bit word.
    struct TokenOwnership {
        // The address of the owner.
        address addr;
        // Keeps track of the start time of ownership with minimal overhead for tokenomics.
        uint64 startTimestamp;
        // Whether the token has been burned.
        bool burned;
    }

    // Compiler will pack this into a single 256bit word.
    struct AddressData {
        // Realistically, 2**64-1 is more than enough.
        uint64 balance;
        // Keeps track of mint count with minimal overhead for tokenomics.
        uint64 numberMinted;
        // Keeps track of burn count with minimal overhead for tokenomics.
        uint64 numberBurned;
        // For miscellaneous variable(s) pertaining to the address
        // (e.g. number of whitelist mint slots used).
        // If there are multiple variables, please pack them into a uint64.
        uint64 aux;
    }

    /**
     * @dev Returns the total amount of tokens stored by the contract.
     * @dev Burned tokens are calculated here, use _totalMinted() if you want to count just minted tokens.
     */
    function totalSupply() external view returns (uint256);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (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 `IERC721Receiver.onERC721Received.selector`.
     */
    function onERC721Received(
        address operator,
        address from,
        uint256 tokenId,
        bytes calldata data
    ) external returns (bytes4);
}

// SPDX-License-Identifier: MIT
// 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);
            }
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)

pragma solidity ^0.8.0;

import "./IERC165.sol";

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)

pragma solidity ^0.8.0;

import "../IERC721.sol";

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

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

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

{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "metadata": {
    "useLiteralContent": true
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"ApprovalCallerNotOwnerNorApproved","type":"error"},{"inputs":[],"name":"ApprovalQueryForNonexistentToken","type":"error"},{"inputs":[],"name":"ApprovalToCurrentOwner","type":"error"},{"inputs":[],"name":"ApproveToCaller","type":"error"},{"inputs":[],"name":"BalanceQueryForZeroAddress","type":"error"},{"inputs":[],"name":"MintToZeroAddress","type":"error"},{"inputs":[],"name":"MintZeroQuantity","type":"error"},{"inputs":[],"name":"OwnerQueryForNonexistentToken","type":"error"},{"inputs":[],"name":"TransferCallerNotOwnerNorApproved","type":"error"},{"inputs":[],"name":"TransferFromIncorrectOwner","type":"error"},{"inputs":[],"name":"TransferToNonERC721ReceiverImplementer","type":"error"},{"inputs":[],"name":"TransferToZeroAddress","type":"error"},{"inputs":[],"name":"URIQueryForNonexistentToken","type":"error"},{"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":false,"internalType":"address","name":"account","type":"address"}],"name":"Paused","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":"address","name":"account","type":"address"}],"name":"Unpaused","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":[],"name":"baseURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"endSale","outputs":[{"internalType":"uint256","name":"","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":"uint256","name":"_id","type":"uint256"}],"name":"getMintRedeemed","outputs":[{"internalType":"bool","name":"","type":"bool"}],"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":"mintedTokenCount","outputs":[{"internalType":"uint16","name":"","type":"uint16"}],"stateMutability":"view","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":"paused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256[]","name":"ids","type":"uint256[]"}],"name":"portstownSeasonOneClaim","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"preSale","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint8","name":"numberOfTokens","type":"uint8"},{"internalType":"uint256","name":"index","type":"uint256"},{"internalType":"bytes","name":"signature","type":"bytes"}],"name":"presaleMintETHWalkersPortstown","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint8","name":"numberOfTokens","type":"uint8"}],"name":"publicMintETHWalkersPortstown","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"publicSale","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"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":[{"internalType":"address","name":"operator","type":"address"},{"internalType":"bool","name":"approved","type":"bool"}],"name":"setApprovalForAll","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"newBaseURI","type":"string"}],"name":"setBaseURI","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bool","name":"_paused","type":"bool"}],"name":"setPaused","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256[]","name":"_newTimes","type":"uint256[]"}],"name":"setSaleTimes","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"signer","type":"address"}],"name":"setSignerAddress","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":"tokenId","type":"uint256"}],"name":"tokenURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_owner","type":"address"}],"name":"tokensOfOwner","outputs":[{"internalType":"uint256[]","name":"","type":"uint256[]"}],"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"},{"inputs":[],"name":"whitelistSigner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"}]

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