// File: @openzeppelin/contracts/access/Ownable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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 Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

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

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

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

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

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

// File: @openzeppelin/contracts/finance/PaymentSplitter.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (finance/PaymentSplitter.sol)

pragma solidity ^0.8.0;

import "../token/ERC20/utils/SafeERC20.sol";
import "../utils/Address.sol";
import "../utils/Context.sol";

/**
 * @title PaymentSplitter
 * @dev This contract allows to split Ether payments among a group of accounts. The sender does not need to be aware
 * that the Ether will be split in this way, since it is handled transparently by the contract.
 *
 * The split can be in equal parts or in any other arbitrary proportion. The way this is specified is by assigning each
 * account to a number of shares. Of all the Ether that this contract receives, each account will then be able to claim
 * an amount proportional to the percentage of total shares they were assigned. The distribution of shares is set at the
 * time of contract deployment and can't be updated thereafter.
 *
 * `PaymentSplitter` follows a _pull payment_ model. This means that payments are not automatically forwarded to the
 * accounts but kept in this contract, and the actual transfer is triggered as a separate step by calling the {release}
 * function.
 *
 * NOTE: This contract assumes that ERC20 tokens will behave similarly to native tokens (Ether). Rebasing tokens, and
 * tokens that apply fees during transfers, are likely to not be supported as expected. If in doubt, we encourage you
 * to run tests before sending real value to this contract.
 */
contract PaymentSplitter is Context {
    event PayeeAdded(address account, uint256 shares);
    event PaymentReleased(address to, uint256 amount);
    event ERC20PaymentReleased(IERC20 indexed token, address to, uint256 amount);
    event PaymentReceived(address from, uint256 amount);

    uint256 private _totalShares;
    uint256 private _totalReleased;

    mapping(address => uint256) private _shares;
    mapping(address => uint256) private _released;
    address[] private _payees;

    mapping(IERC20 => uint256) private _erc20TotalReleased;
    mapping(IERC20 => mapping(address => uint256)) private _erc20Released;

    /**
     * @dev Creates an instance of `PaymentSplitter` where each account in `payees` is assigned the number of shares at
     * the matching position in the `shares` array.
     *
     * All addresses in `payees` must be non-zero. Both arrays must have the same non-zero length, and there must be no
     * duplicates in `payees`.
     */
    constructor(address[] memory payees, uint256[] memory shares_) payable {
        require(payees.length == shares_.length, "PaymentSplitter: payees and shares length mismatch");
        require(payees.length > 0, "PaymentSplitter: no payees");

        for (uint256 i = 0; i < payees.length; i++) {
            _addPayee(payees[i], shares_[i]);
        }
    }

    /**
     * @dev The Ether received will be logged with {PaymentReceived} events. Note that these events are not fully
     * reliable: it's possible for a contract to receive Ether without triggering this function. This only affects the
     * reliability of the events, and not the actual splitting of Ether.
     *
     * To learn more about this see the Solidity documentation for
     * https://solidity.readthedocs.io/en/latest/contracts.html#fallback-function[fallback
     * functions].
     */
    receive() external payable virtual {
        emit PaymentReceived(_msgSender(), msg.value);
    }

    /**
     * @dev Getter for the total shares held by payees.
     */
    function totalShares() public view returns (uint256) {
        return _totalShares;
    }

    /**
     * @dev Getter for the total amount of Ether already released.
     */
    function totalReleased() public view returns (uint256) {
        return _totalReleased;
    }

    /**
     * @dev Getter for the total amount of `token` already released. `token` should be the address of an IERC20
     * contract.
     */
    function totalReleased(IERC20 token) public view returns (uint256) {
        return _erc20TotalReleased[token];
    }

    /**
     * @dev Getter for the amount of shares held by an account.
     */
    function shares(address account) public view returns (uint256) {
        return _shares[account];
    }

    /**
     * @dev Getter for the amount of Ether already released to a payee.
     */
    function released(address account) public view returns (uint256) {
        return _released[account];
    }

    /**
     * @dev Getter for the amount of `token` tokens already released to a payee. `token` should be the address of an
     * IERC20 contract.
     */
    function released(IERC20 token, address account) public view returns (uint256) {
        return _erc20Released[token][account];
    }

    /**
     * @dev Getter for the address of the payee number `index`.
     */
    function payee(uint256 index) public view returns (address) {
        return _payees[index];
    }

    /**
     * @dev Getter for the amount of payee's releasable Ether.
     */
    function releasable(address account) public view returns (uint256) {
        uint256 totalReceived = address(this).balance + totalReleased();
        return _pendingPayment(account, totalReceived, released(account));
    }

    /**
     * @dev Getter for the amount of payee's releasable `token` tokens. `token` should be the address of an
     * IERC20 contract.
     */
    function releasable(IERC20 token, address account) public view returns (uint256) {
        uint256 totalReceived = token.balanceOf(address(this)) + totalReleased(token);
        return _pendingPayment(account, totalReceived, released(token, account));
    }

    /**
     * @dev Triggers a transfer to `account` of the amount of Ether they are owed, according to their percentage of the
     * total shares and their previous withdrawals.
     */
    function release(address payable account) public virtual {
        require(_shares[account] > 0, "PaymentSplitter: account has no shares");

        uint256 payment = releasable(account);

        require(payment != 0, "PaymentSplitter: account is not due payment");

        // _totalReleased is the sum of all values in _released.
        // If "_totalReleased += payment" does not overflow, then "_released[account] += payment" cannot overflow.
        _totalReleased += payment;
        unchecked {
            _released[account] += payment;
        }

        Address.sendValue(account, payment);
        emit PaymentReleased(account, payment);
    }

    /**
     * @dev Triggers a transfer to `account` of the amount of `token` tokens they are owed, according to their
     * percentage of the total shares and their previous withdrawals. `token` must be the address of an IERC20
     * contract.
     */
    function release(IERC20 token, address account) public virtual {
        require(_shares[account] > 0, "PaymentSplitter: account has no shares");

        uint256 payment = releasable(token, account);

        require(payment != 0, "PaymentSplitter: account is not due payment");

        // _erc20TotalReleased[token] is the sum of all values in _erc20Released[token].
        // If "_erc20TotalReleased[token] += payment" does not overflow, then "_erc20Released[token][account] += payment"
        // cannot overflow.
        _erc20TotalReleased[token] += payment;
        unchecked {
            _erc20Released[token][account] += payment;
        }

        SafeERC20.safeTransfer(token, account, payment);
        emit ERC20PaymentReleased(token, account, payment);
    }

    /**
     * @dev internal logic for computing the pending payment of an `account` given the token historical balances and
     * already released amounts.
     */
    function _pendingPayment(
        address account,
        uint256 totalReceived,
        uint256 alreadyReleased
    ) private view returns (uint256) {
        return (totalReceived * _shares[account]) / _totalShares - alreadyReleased;
    }

    /**
     * @dev Add a new payee to the contract.
     * @param account The address of the payee to add.
     * @param shares_ The number of shares owned by the payee.
     */
    function _addPayee(address account, uint256 shares_) private {
        require(account != address(0), "PaymentSplitter: account is the zero address");
        require(shares_ > 0, "PaymentSplitter: shares are 0");
        require(_shares[account] == 0, "PaymentSplitter: account already has shares");

        _payees.push(account);
        _shares[account] = shares_;
        _totalShares = _totalShares + shares_;
        emit PayeeAdded(account, shares_);
    }
}

// File: @openzeppelin/contracts/interfaces/IERC2981.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (interfaces/IERC2981.sol)

pragma solidity ^0.8.0;

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

/**
 * @dev Interface for the NFT Royalty Standard.
 *
 * A standardized way to retrieve royalty payment information for non-fungible tokens (NFTs) to enable universal
 * support for royalty payments across all NFT marketplaces and ecosystem participants.
 *
 * _Available since v4.5._
 */
interface IERC2981 is IERC165 {
    /**
     * @dev Returns how much royalty is owed and to whom, based on a sale price that may be denominated in any unit of
     * exchange. The royalty amount is denominated and should be paid in that same unit of exchange.
     */
    function royaltyInfo(
        uint256 tokenId,
        uint256 salePrice
    ) external view returns (address receiver, uint256 royaltyAmount);
}

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



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (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 Modifier to make a function callable only when the contract is not paused.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    modifier whenNotPaused() {
        _requireNotPaused();
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    modifier whenPaused() {
        _requirePaused();
        _;
    }

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

    /**
     * @dev Throws if the contract is paused.
     */
    function _requireNotPaused() internal view virtual {
        require(!paused(), "Pausable: paused");
    }

    /**
     * @dev Throws if the contract is not paused.
     */
    function _requirePaused() internal view virtual {
        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());
    }
}

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



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be _NOT_ENTERED
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

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

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

    /**
     * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
     * `nonReentrant` function in the call stack.
     */
    function _reentrancyGuardEntered() internal view returns (bool) {
        return _status == _ENTERED;
    }
}

// File: @openzeppelin/contracts/token/common/ERC2981.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/common/ERC2981.sol)

pragma solidity ^0.8.0;

import "../../interfaces/IERC2981.sol";
import "../../utils/introspection/ERC165.sol";

/**
 * @dev Implementation of the NFT Royalty Standard, a standardized way to retrieve royalty payment information.
 *
 * Royalty information can be specified globally for all token ids via {_setDefaultRoyalty}, and/or individually for
 * specific token ids via {_setTokenRoyalty}. The latter takes precedence over the first.
 *
 * Royalty is specified as a fraction of sale price. {_feeDenominator} is overridable but defaults to 10000, meaning the
 * fee is specified in basis points by default.
 *
 * IMPORTANT: ERC-2981 only specifies a way to signal royalty information and does not enforce its payment. See
 * https://eips.ethereum.org/EIPS/eip-2981#optional-royalty-payments[Rationale] in the EIP. Marketplaces are expected to
 * voluntarily pay royalties together with sales, but note that this standard is not yet widely supported.
 *
 * _Available since v4.5._
 */
abstract contract ERC2981 is IERC2981, ERC165 {
    struct RoyaltyInfo {
        address receiver;
        uint96 royaltyFraction;
    }

    RoyaltyInfo private _defaultRoyaltyInfo;
    mapping(uint256 => RoyaltyInfo) private _tokenRoyaltyInfo;

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC165) returns (bool) {
        return interfaceId == type(IERC2981).interfaceId || super.supportsInterface(interfaceId);
    }

    /**
     * @inheritdoc IERC2981
     */
    function royaltyInfo(uint256 tokenId, uint256 salePrice) public view virtual override returns (address, uint256) {
        RoyaltyInfo memory royalty = _tokenRoyaltyInfo[tokenId];

        if (royalty.receiver == address(0)) {
            royalty = _defaultRoyaltyInfo;
        }

        uint256 royaltyAmount = (salePrice * royalty.royaltyFraction) / _feeDenominator();

        return (royalty.receiver, royaltyAmount);
    }

    /**
     * @dev The denominator with which to interpret the fee set in {_setTokenRoyalty} and {_setDefaultRoyalty} as a
     * fraction of the sale price. Defaults to 10000 so fees are expressed in basis points, but may be customized by an
     * override.
     */
    function _feeDenominator() internal pure virtual returns (uint96) {
        return 10000;
    }

    /**
     * @dev Sets the royalty information that all ids in this contract will default to.
     *
     * Requirements:
     *
     * - `receiver` cannot be the zero address.
     * - `feeNumerator` cannot be greater than the fee denominator.
     */
    function _setDefaultRoyalty(address receiver, uint96 feeNumerator) internal virtual {
        require(feeNumerator <= _feeDenominator(), "ERC2981: royalty fee will exceed salePrice");
        require(receiver != address(0), "ERC2981: invalid receiver");

        _defaultRoyaltyInfo = RoyaltyInfo(receiver, feeNumerator);
    }

    /**
     * @dev Removes default royalty information.
     */
    function _deleteDefaultRoyalty() internal virtual {
        delete _defaultRoyaltyInfo;
    }

    /**
     * @dev Sets the royalty information for a specific token id, overriding the global default.
     *
     * Requirements:
     *
     * - `receiver` cannot be the zero address.
     * - `feeNumerator` cannot be greater than the fee denominator.
     */
    function _setTokenRoyalty(uint256 tokenId, address receiver, uint96 feeNumerator) internal virtual {
        require(feeNumerator <= _feeDenominator(), "ERC2981: royalty fee will exceed salePrice");
        require(receiver != address(0), "ERC2981: Invalid parameters");

        _tokenRoyaltyInfo[tokenId] = RoyaltyInfo(receiver, feeNumerator);
    }

    /**
     * @dev Resets royalty information for the token id back to the global default.
     */
    function _resetTokenRoyalty(uint256 tokenId) internal virtual {
        delete _tokenRoyaltyInfo[tokenId];
    }
}

// File: @openzeppelin/contracts/token/ERC20/extensions/IERC20Permit.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/extensions/IERC20Permit.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    /**
     * @dev Returns the current nonce for `owner`. This value must be
     * included whenever a signature is generated for {permit}.
     *
     * Every successful call to {permit} increases ``owner``'s nonce by one. This
     * prevents a signature from being used multiple times.
     */
    function nonces(address owner) external view returns (uint256);

    /**
     * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
     */
    // solhint-disable-next-line func-name-mixedcase
    function DOMAIN_SEPARATOR() external view returns (bytes32);
}

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



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

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

    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

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

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

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

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

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

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



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../extensions/IERC20Permit.sol";
import "../../../utils/Address.sol";

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

    /**
     * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    /**
     * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the
     * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.
     */
    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

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

    /**
     * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 oldAllowance = token.allowance(address(this), spender);
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value));
    }

    /**
     * @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value));
        }
    }

    /**
     * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful. Compatible with tokens that require the approval to be set to
     * 0 before setting it to a non-zero value.
     */
    function forceApprove(IERC20 token, address spender, uint256 value) internal {
        bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value);

        if (!_callOptionalReturnBool(token, approvalCall)) {
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0));
            _callOptionalReturn(token, approvalCall);
        }
    }

    /**
     * @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`.
     * Revert on invalid signature.
     */
    function safePermit(
        IERC20Permit token,
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal {
        uint256 nonceBefore = token.nonces(owner);
        token.permit(owner, spender, value, deadline, v, r, s);
        uint256 nonceAfter = token.nonces(owner);
        require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
    }

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

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

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     *
     * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.
     */
    function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false
        // and not revert is the subcall reverts.

        (bool success, bytes memory returndata) = address(token).call(data);
        return
            success && (returndata.length == 0 || abi.decode(returndata, (bool))) && Address.isContract(address(token));
    }
}

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



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC721/ERC721.sol)

pragma solidity ^0.8.0;

import "./IERC721.sol";
import "./IERC721Receiver.sol";
import "./extensions/IERC721Metadata.sol";
import "../../utils/Address.sol";
import "../../utils/Context.sol";
import "../../utils/Strings.sol";
import "../../utils/introspection/ERC165.sol";

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

    // Token name
    string private _name;

    // Token symbol
    string private _symbol;

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

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

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

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

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

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

    /**
     * @dev See {IERC721-balanceOf}.
     */
    function balanceOf(address owner) public view virtual override returns (uint256) {
        require(owner != address(0), "ERC721: address zero is not a valid owner");
        return _balances[owner];
    }

    /**
     * @dev See {IERC721-ownerOf}.
     */
    function ownerOf(uint256 tokenId) public view virtual override returns (address) {
        address owner = _ownerOf(tokenId);
        require(owner != address(0), "ERC721: invalid token ID");
        return owner;
    }

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

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

    /**
     * @dev See {IERC721Metadata-tokenURI}.
     */
    function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
        _requireMinted(tokenId);

        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 overridden in child contracts.
     */
    function _baseURI() internal view virtual returns (string memory) {
        return "";
    }

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

        require(
            _msgSender() == owner || isApprovedForAll(owner, _msgSender()),
            "ERC721: approve caller is not token owner or approved for all"
        );

        _approve(to, tokenId);
    }

    /**
     * @dev See {IERC721-getApproved}.
     */
    function getApproved(uint256 tokenId) public view virtual override returns (address) {
        _requireMinted(tokenId);

        return _tokenApprovals[tokenId];
    }

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

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

    /**
     * @dev See {IERC721-transferFrom}.
     */
    function transferFrom(address from, address to, uint256 tokenId) public virtual override {
        //solhint-disable-next-line max-line-length
        require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: caller is not token owner or 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: caller is not token owner or 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 the owner of the `tokenId`. Does NOT revert if token doesn't exist
     */
    function _ownerOf(uint256 tokenId) internal view virtual returns (address) {
        return _owners[tokenId];
    }

    /**
     * @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 _ownerOf(tokenId) != address(0);
    }

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

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

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

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

        _beforeTokenTransfer(address(0), to, tokenId, 1);

        // Check that tokenId was not minted by `_beforeTokenTransfer` hook
        require(!_exists(tokenId), "ERC721: token already minted");

        unchecked {
            // Will not overflow unless all 2**256 token ids are minted to the same owner.
            // Given that tokens are minted one by one, it is impossible in practice that
            // this ever happens. Might change if we allow batch minting.
            // The ERC fails to describe this case.
            _balances[to] += 1;
        }

        _owners[tokenId] = to;

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

        _afterTokenTransfer(address(0), to, tokenId, 1);
    }

    /**
     * @dev Destroys `tokenId`.
     * The approval is cleared when the token is burned.
     * This is an internal function that does not check if the sender is authorized to operate on the token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     *
     * Emits a {Transfer} event.
     */
    function _burn(uint256 tokenId) internal virtual {
        address owner = ERC721.ownerOf(tokenId);

        _beforeTokenTransfer(owner, address(0), tokenId, 1);

        // Update ownership in case tokenId was transferred by `_beforeTokenTransfer` hook
        owner = ERC721.ownerOf(tokenId);

        // Clear approvals
        delete _tokenApprovals[tokenId];

        unchecked {
            // Cannot overflow, as that would require more tokens to be burned/transferred
            // out than the owner initially received through minting and transferring in.
            _balances[owner] -= 1;
        }
        delete _owners[tokenId];

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

        _afterTokenTransfer(owner, address(0), tokenId, 1);
    }

    /**
     * @dev Transfers `tokenId` from `from` to `to`.
     *  As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     *
     * Emits a {Transfer} event.
     */
    function _transfer(address from, address to, uint256 tokenId) internal virtual {
        require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer from incorrect owner");
        require(to != address(0), "ERC721: transfer to the zero address");

        _beforeTokenTransfer(from, to, tokenId, 1);

        // Check that tokenId was not transferred by `_beforeTokenTransfer` hook
        require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer from incorrect owner");

        // Clear approvals from the previous owner
        delete _tokenApprovals[tokenId];

        unchecked {
            // `_balances[from]` cannot overflow for the same reason as described in `_burn`:
            // `from`'s balance is the number of token held, which is at least one before the current
            // transfer.
            // `_balances[to]` could overflow in the conditions described in `_mint`. That would require
            // all 2**256 token ids to be minted, which in practice is impossible.
            _balances[from] -= 1;
            _balances[to] += 1;
        }
        _owners[tokenId] = to;

        emit Transfer(from, to, tokenId);

        _afterTokenTransfer(from, to, tokenId, 1);
    }

    /**
     * @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);
    }

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

    /**
     * @dev Reverts if the `tokenId` has not been minted yet.
     */
    function _requireMinted(uint256 tokenId) internal view virtual {
        require(_exists(tokenId), "ERC721: invalid token ID");
    }

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

    /**
     * @dev Hook that is called before any token transfer. This includes minting and burning. If {ERC721Consecutive} is
     * used, the hook may be called as part of a consecutive (batch) mint, as indicated by `batchSize` greater than 1.
     *
     * Calling conditions:
     *
     * - When `from` and `to` are both non-zero, ``from``'s tokens will be transferred to `to`.
     * - When `from` is zero, the tokens will be minted for `to`.
     * - When `to` is zero, ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     * - `batchSize` is non-zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(address from, address to, uint256 firstTokenId, uint256 batchSize) internal virtual {}

    /**
     * @dev Hook that is called after any token transfer. This includes minting and burning. If {ERC721Consecutive} is
     * used, the hook may be called as part of a consecutive (batch) mint, as indicated by `batchSize` greater than 1.
     *
     * Calling conditions:
     *
     * - When `from` and `to` are both non-zero, ``from``'s tokens were transferred to `to`.
     * - When `from` is zero, the tokens were minted for `to`.
     * - When `to` is zero, ``from``'s tokens were burned.
     * - `from` and `to` are never both zero.
     * - `batchSize` is non-zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _afterTokenTransfer(address from, address to, uint256 firstTokenId, uint256 batchSize) internal virtual {}

    /**
     * @dev Unsafe write access to the balances, used by extensions that "mint" tokens using an {ownerOf} override.
     *
     * WARNING: Anyone calling this MUST ensure that the balances remain consistent with the ownership. The invariant
     * being that for any address `a` the value returned by `balanceOf(a)` must be equal to the number of tokens such
     * that `ownerOf(tokenId)` is `a`.
     */
    // solhint-disable-next-line func-name-mixedcase
    function __unsafe_increaseBalance(address account, uint256 amount) internal {
        _balances[account] += amount;
    }
}

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



// 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);
}

// File: @openzeppelin/contracts/token/ERC721/IERC721.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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 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: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC721
     * or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must
     * understand this adds an external call which potentially creates a reentrancy vulnerability.
     *
     * 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);
}

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



// 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);
}

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



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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
     *
     * Furthermore, `isContract` will also return true if the target contract within
     * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
     * which only has an effect at the end of a transaction.
     * ====
     *
     * [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://consensys.net/diligence/blog/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/v0.8.0/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 functionCallWithValue(target, data, 0, "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");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, 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) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, 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) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or 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 {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // 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
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}

// File: @openzeppelin/contracts/utils/Base64.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/Base64.sol)

pragma solidity ^0.8.0;

/**
 * @dev Provides a set of functions to operate with Base64 strings.
 *
 * _Available since v4.5._
 */
library Base64 {
    /**
     * @dev Base64 Encoding/Decoding Table
     */
    string internal constant _TABLE = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";

    /**
     * @dev Converts a `bytes` to its Bytes64 `string` representation.
     */
    function encode(bytes memory data) internal pure returns (string memory) {
        /**
         * Inspired by Brecht Devos (Brechtpd) implementation - MIT licence
         * https://github.com/Brechtpd/base64/blob/e78d9fd951e7b0977ddca77d92dc85183770daf4/base64.sol
         */
        if (data.length == 0) return "";

        // Loads the table into memory
        string memory table = _TABLE;

        // Encoding takes 3 bytes chunks of binary data from `bytes` data parameter
        // and split into 4 numbers of 6 bits.
        // The final Base64 length should be `bytes` data length multiplied by 4/3 rounded up
        // - `data.length + 2`  -> Round up
        // - `/ 3`              -> Number of 3-bytes chunks
        // - `4 *`              -> 4 characters for each chunk
        string memory result = new string(4 * ((data.length + 2) / 3));

        /// @solidity memory-safe-assembly
        assembly {
            // Prepare the lookup table (skip the first "length" byte)
            let tablePtr := add(table, 1)

            // Prepare result pointer, jump over length
            let resultPtr := add(result, 32)

            // Run over the input, 3 bytes at a time
            for {
                let dataPtr := data
                let endPtr := add(data, mload(data))
            } lt(dataPtr, endPtr) {

            } {
                // Advance 3 bytes
                dataPtr := add(dataPtr, 3)
                let input := mload(dataPtr)

                // To write each character, shift the 3 bytes (18 bits) chunk
                // 4 times in blocks of 6 bits for each character (18, 12, 6, 0)
                // and apply logical AND with 0x3F which is the number of
                // the previous character in the ASCII table prior to the Base64 Table
                // The result is then added to the table to get the character to write,
                // and finally write it in the result pointer but with a left shift
                // of 256 (1 byte) - 8 (1 ASCII char) = 248 bits

                mstore8(resultPtr, mload(add(tablePtr, and(shr(18, input), 0x3F))))
                resultPtr := add(resultPtr, 1) // Advance

                mstore8(resultPtr, mload(add(tablePtr, and(shr(12, input), 0x3F))))
                resultPtr := add(resultPtr, 1) // Advance

                mstore8(resultPtr, mload(add(tablePtr, and(shr(6, input), 0x3F))))
                resultPtr := add(resultPtr, 1) // Advance

                mstore8(resultPtr, mload(add(tablePtr, and(input, 0x3F))))
                resultPtr := add(resultPtr, 1) // Advance
            }

            // When data `bytes` is not exactly 3 bytes long
            // it is padded with `=` characters at the end
            switch mod(mload(data), 3)
            case 1 {
                mstore8(sub(resultPtr, 1), 0x3d)
                mstore8(sub(resultPtr, 2), 0x3d)
            }
            case 2 {
                mstore8(sub(resultPtr, 1), 0x3d)
            }
        }

        return result;
    }
}

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



// 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;
    }
}

// File: @openzeppelin/contracts/utils/cryptography/ECDSA.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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 // Deprecated in v4.8
    }

    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");
        }
    }

    /**
     * @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) {
        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.
            /// @solidity memory-safe-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 {
            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 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 message) {
        // 32 is the length in bytes of hash,
        // enforced by the type signature above
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x00, "\x19Ethereum Signed Message:\n32")
            mstore(0x1c, hash)
            message := keccak256(0x00, 0x3c)
        }
    }

    /**
     * @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 data) {
        /// @solidity memory-safe-assembly
        assembly {
            let ptr := mload(0x40)
            mstore(ptr, "\x19\x01")
            mstore(add(ptr, 0x02), domainSeparator)
            mstore(add(ptr, 0x22), structHash)
            data := keccak256(ptr, 0x42)
        }
    }

    /**
     * @dev Returns an Ethereum Signed Data with intended validator, created from a
     * `validator` and `data` according to the version 0 of EIP-191.
     *
     * See {recover}.
     */
    function toDataWithIntendedValidatorHash(address validator, bytes memory data) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19\x00", validator, data));
    }
}

// File: @openzeppelin/contracts/utils/introspection/ERC165.sol



// 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;
    }
}

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



// 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);
}

// File: @openzeppelin/contracts/utils/math/Math.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/math/Math.sol)

pragma solidity ^0.8.0;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    enum Rounding {
        Down, // Toward negative infinity
        Up, // Toward infinity
        Zero // Toward zero
    }

    /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a > b ? a : b;
    }

    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two numbers. The result is rounded towards
     * zero.
     */
    function average(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b) / 2 can overflow.
        return (a & b) + (a ^ b) / 2;
    }

    /**
     * @dev Returns the ceiling of the division of two numbers.
     *
     * This differs from standard division with `/` in that it rounds up instead
     * of rounding down.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b - 1) / b can overflow on addition, so we distribute.
        return a == 0 ? 0 : (a - 1) / b + 1;
    }

    /**
     * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
     * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)
     * with further edits by Uniswap Labs also under MIT license.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) {
        unchecked {
            // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
            // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
            // variables such that product = prod1 * 2^256 + prod0.
            uint256 prod0; // Least significant 256 bits of the product
            uint256 prod1; // Most significant 256 bits of the product
            assembly {
                let mm := mulmod(x, y, not(0))
                prod0 := mul(x, y)
                prod1 := sub(sub(mm, prod0), lt(mm, prod0))
            }

            // Handle non-overflow cases, 256 by 256 division.
            if (prod1 == 0) {
                // Solidity will revert if denominator == 0, unlike the div opcode on its own.
                // The surrounding unchecked block does not change this fact.
                // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.
                return prod0 / denominator;
            }

            // Make sure the result is less than 2^256. Also prevents denominator == 0.
            require(denominator > prod1, "Math: mulDiv overflow");

            ///////////////////////////////////////////////
            // 512 by 256 division.
            ///////////////////////////////////////////////

            // Make division exact by subtracting the remainder from [prod1 prod0].
            uint256 remainder;
            assembly {
                // Compute remainder using mulmod.
                remainder := mulmod(x, y, denominator)

                // Subtract 256 bit number from 512 bit number.
                prod1 := sub(prod1, gt(remainder, prod0))
                prod0 := sub(prod0, remainder)
            }

            // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.
            // See https://cs.stackexchange.com/q/138556/92363.

            // Does not overflow because the denominator cannot be zero at this stage in the function.
            uint256 twos = denominator & (~denominator + 1);
            assembly {
                // Divide denominator by twos.
                denominator := div(denominator, twos)

                // Divide [prod1 prod0] by twos.
                prod0 := div(prod0, twos)

                // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
                twos := add(div(sub(0, twos), twos), 1)
            }

            // Shift in bits from prod1 into prod0.
            prod0 |= prod1 * twos;

            // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
            // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
            // four bits. That is, denominator * inv = 1 mod 2^4.
            uint256 inverse = (3 * denominator) ^ 2;

            // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works
            // in modular arithmetic, doubling the correct bits in each step.
            inverse *= 2 - denominator * inverse; // inverse mod 2^8
            inverse *= 2 - denominator * inverse; // inverse mod 2^16
            inverse *= 2 - denominator * inverse; // inverse mod 2^32
            inverse *= 2 - denominator * inverse; // inverse mod 2^64
            inverse *= 2 - denominator * inverse; // inverse mod 2^128
            inverse *= 2 - denominator * inverse; // inverse mod 2^256

            // Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
            // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
            // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
            // is no longer required.
            result = prod0 * inverse;
            return result;
        }
    }

    /**
     * @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) {
        uint256 result = mulDiv(x, y, denominator);
        if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {
            result += 1;
        }
        return result;
    }

    /**
     * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down.
     *
     * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
     */
    function sqrt(uint256 a) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }

        // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
        //
        // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
        // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
        //
        // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
        // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
        // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
        //
        // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
        uint256 result = 1 << (log2(a) >> 1);

        // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
        // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
        // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
        // into the expected uint128 result.
        unchecked {
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            return min(result, a / result);
        }
    }

    /**
     * @notice Calculates sqrt(a), following the selected rounding direction.
     */
    function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = sqrt(a);
            return result + (rounding == Rounding.Up && result * result < a ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 2, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 128;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 64;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 32;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 16;
            }
            if (value >> 8 > 0) {
                value >>= 8;
                result += 8;
            }
            if (value >> 4 > 0) {
                value >>= 4;
                result += 4;
            }
            if (value >> 2 > 0) {
                value >>= 2;
                result += 2;
            }
            if (value >> 1 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 2, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log2(value);
            return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 10, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >= 10 ** 64) {
                value /= 10 ** 64;
                result += 64;
            }
            if (value >= 10 ** 32) {
                value /= 10 ** 32;
                result += 32;
            }
            if (value >= 10 ** 16) {
                value /= 10 ** 16;
                result += 16;
            }
            if (value >= 10 ** 8) {
                value /= 10 ** 8;
                result += 8;
            }
            if (value >= 10 ** 4) {
                value /= 10 ** 4;
                result += 4;
            }
            if (value >= 10 ** 2) {
                value /= 10 ** 2;
                result += 2;
            }
            if (value >= 10 ** 1) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log10(value);
            return result + (rounding == Rounding.Up && 10 ** result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 256, rounded down, of a positive value.
     * Returns 0 if given 0.
     *
     * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
     */
    function log256(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 16;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 8;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 4;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 2;
            }
            if (value >> 8 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 256, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log256(value);
            return result + (rounding == Rounding.Up && 1 << (result << 3) < value ? 1 : 0);
        }
    }
}

// File: @openzeppelin/contracts/utils/math/SignedMath.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SignedMath.sol)

pragma solidity ^0.8.0;

/**
 * @dev Standard signed math utilities missing in the Solidity language.
 */
library SignedMath {
    /**
     * @dev Returns the largest of two signed numbers.
     */
    function max(int256 a, int256 b) internal pure returns (int256) {
        return a > b ? a : b;
    }

    /**
     * @dev Returns the smallest of two signed numbers.
     */
    function min(int256 a, int256 b) internal pure returns (int256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two signed numbers without overflow.
     * The result is rounded towards zero.
     */
    function average(int256 a, int256 b) internal pure returns (int256) {
        // Formula from the book "Hacker's Delight"
        int256 x = (a & b) + ((a ^ b) >> 1);
        return x + (int256(uint256(x) >> 255) & (a ^ b));
    }

    /**
     * @dev Returns the absolute unsigned value of a signed value.
     */
    function abs(int256 n) internal pure returns (uint256) {
        unchecked {
            // must be unchecked in order to support `n = type(int256).min`
            return uint256(n >= 0 ? n : -n);
        }
    }
}

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



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Strings.sol)

pragma solidity ^0.8.0;

import "./math/Math.sol";
import "./math/SignedMath.sol";

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _SYMBOLS = "0123456789abcdef";
    uint8 private constant _ADDRESS_LENGTH = 20;

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        unchecked {
            uint256 length = Math.log10(value) + 1;
            string memory buffer = new string(length);
            uint256 ptr;
            /// @solidity memory-safe-assembly
            assembly {
                ptr := add(buffer, add(32, length))
            }
            while (true) {
                ptr--;
                /// @solidity memory-safe-assembly
                assembly {
                    mstore8(ptr, byte(mod(value, 10), _SYMBOLS))
                }
                value /= 10;
                if (value == 0) break;
            }
            return buffer;
        }
    }

    /**
     * @dev Converts a `int256` to its ASCII `string` decimal representation.
     */
    function toString(int256 value) internal pure returns (string memory) {
        return string(abi.encodePacked(value < 0 ? "-" : "", toString(SignedMath.abs(value))));
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        unchecked {
            return toHexString(value, Math.log256(value) + 1);
        }
    }

    /**
     * @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] = _SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }

    /**
     * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation.
     */
    function toHexString(address addr) internal pure returns (string memory) {
        return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);
    }

    /**
     * @dev Returns true if the two strings are equal.
     */
    function equal(string memory a, string memory b) internal pure returns (bool) {
        return keccak256(bytes(a)) == keccak256(bytes(b));
    }
}

// File: contracts/artist/common/minter/utils/IOasis.sol



// SPDX-License-Identifier: GPL-3.0-or-later

// IOasis.sol - Simplified interface for the Oasis NFT contract

pragma solidity ^0.8.17;

interface IOasis {
    function balanceOf(address _address) external view returns (uint256);

    function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256);
}
// File: contracts/artist/common/minter/utils/ISanctionsList.sol



// SPDX-License-Identifier: GPL-3.0-or-later

// ISanctionsList.sol - Simplified interface for the SanctionsList contract

pragma solidity ^0.8.17;

interface ISanctionsList {
    function isSanctioned(address addr) external view returns (bool);
}
// File: contracts/artist/common/simple-minter/IWildXYZMinter.sol



// SPDX-License-Identifier: GPL-3.0-or-later

// ░██╗░░░░░░░██╗░██╗░██╗░░░░░░██████╗░░██╗░░██╗░██╗░░░██╗░███████╗
// ░██║░░██╗░░██║░██║░██║░░░░░░██╔══██╗░╚██╗██╔╝░╚██╗░██╔╝░╚════██║
// ░╚██╗████╗██╔╝░██║░██║░░░░░░██║░░██║░░╚███╔╝░░░╚████╔╝░░░░███╔═╝
// ░░████╔═████║░░██║░██║░░░░░░██║░░██║░░██╔██╗░░░░╚██╔╝░░░██╔══╝░░
// ░░╚██╔╝░╚██╔╝░░██║░███████╗░██████╔╝░██╔╝╚██╗░░░░██║░░░░███████╗
// ░░░╚═╝░░░╚═╝░░░╚═╝░╚══════╝░╚═════╝░░╚═╝░░╚═╝░░░░╚═╝░░░░╚══════╝

pragma solidity ^0.8.17;

interface IDelegationRegistry {
  /** @notice Returns true if the address is delegated to act on your behalf for a token contract or an entire vault
   * @param delegate The hotwallet to act on your behalf
   * @param contract_ The address for the contract you're delegating
   * @param vault The cold wallet who issued the delegation
   */
  function checkDelegateForContract(address delegate, address vault, address contract_) external view returns (bool);
}

interface IWildXYZMinter {
  // enums

  /// @dev States for the minter
  enum State {
    Setup, // also "comingsoon"
    Live, // defer to phases for state name
    Complete, // also "soldout"
    Paused // temporary paused state
  }

  enum MintType {
    // DO NOT CHANGE ORDERING - APPEND ONLY
    // DO NOT CHANGE ORDERING, I WILL FIND YOU AND MAKE YOU PAY FOR YOUR SINS
    // DO NOT CHANGE ORDERING - APPEND ONLY

    // promo mint types
    Promo,
    CreditCard,
    WildPass,
    // groups
    Oasis,
    Allowlist,
    PublicSale,
    // artist
    ArtistAllowlist,
    // presale
    PresalePurchase,
    // not used
    // other
    Auction,
    Raffle,
    DutchAuction
  }

  // structs

  /// @dev Represents a minting group
  struct Group {
    string name;
    uint256 id;
    uint256 startTime;
    uint256 endTime;
    uint256 price;
  }

  struct MinterInfo {
    State minterState;
    uint256 maxSupply;
    uint256 totalSupply;
    uint256 maxPerOasis;
    uint256 maxPerAddress;
    address allowlistSigner;
    Group[] groups;
  }

  struct UserInfo {
    uint256 userGroupId;
    uint256 allowance;
    uint256 totalSupply;
    bool isGroupLive;
  }

  // events

  /** @notice Emitted when a new token is minted
   * @dev Generalized mint event, uses the mintType parameter to distinguish mint types
   * @param to - address of the token owner
   * @param tokenIds - token ID array
   * @param mintType - MintType enum
   * @param amountPaid - amount paid for the mint
   * @param isDelegated - whether or not the mint was delegated
   * @param delegatedVault - address of the delegated vault
   * @param oasisUsed - whether or not an Oasis pass was used. Can be true even if oasisIds is empty (ex. oasis price in public sale).
   * @param oasisIds - Oasis pass ID array (same index/length as tokenId). Empty if ids not specified.
   */
  event TokenMint(address indexed to, uint256[] tokenIds, MintType indexed mintType, uint256 amountPaid, bool isDelegated, address delegatedVault, bool oasisUsed, uint256[] oasisIds);

  // errors

  /// @notice Emitted when trying to call setup twice
  error AlreadySetup();

  /// @notice Emitted when not in live state
  error NotLive();

  /// @notice Emitted when not in complete state
  error NotComplete();

  /// @notice Emitted when group is not allowed to mint yet
  error GroupNotLive(uint256 _groupId);

  /// @notice Emitted when a non-admin tries to call an admin function
  error OnlyAdmin();

  /// @notice Emitted when given a zero address
  error ZeroAddress();

  /// @notice Emitted when given a zero amount
  error ZeroAmount();

  /// @notice Emitted when setting group start time to an invalid value
  error InvalidGroupStartTime(uint256 _startTime);

  /// @notice Emitted when a signature is invalid
  error InvalidSignature(bytes _signature);

  /// @notice Emitted when an OFAC sanctioned address tries to interact with a function
  error SanctionedAddress(address _to);

  /// @notice Emitted when a function is called by a non-delegated address
  error NotDelegated(address _sender, address _vault, address _contract);

  /// @notice Emitted when failing to withdraw to wallet
  error FailedToWithdraw(string _walletName, address _wallet);

  /// @notice Emitted when given a non-existing groupId
  error GroupDoesNotExist(uint256 _groupId);

  /// @notice Emitted when amount requested exceeds nft max supply
  error MaxSupplyExceeded();

  /// @notice Emitted when the value provided is not enough for the function
  error InsufficientFunds();

  /// @notice Emitted when two or more arrays do not match in size
  error ArraySizeMismatch();

  error NotEnoughOasisMints(address _receiver);
  error ZeroOasisAllowance(address _receiver);

  error FailedToMint(address _receiver);

  /// @notice Emitted when a user tries to mint too many toksns
  error MaxPerAddressExceeded(address _receiver, uint256 _amount);

  /// @notice Emitted when a non-admin or non-manager tries to call an admin or manager function
  error OnlyAdminOrManager();

  /// @notice Emitted when presaleMint function receives a non-presale mint type
  error InvalidPresaleMintType(MintType _mintType);

  /// @notice Emitted when presaleMint function fails to mint
  error FailedToPresaleMint(address _receiver, MintType _mintType);

  /// @notice Emitted when presaleMint function is called by a non-presale minter
  error OnlyPresaleMinterOrAdmin();
}

// File: contracts/artist/common/simple-minter/WildXYZMinterPresale.sol



// SPDX-License-Identifier: GPL-3.0-or-later

// ░██╗░░░░░░░██╗░██╗░██╗░░░░░░██████╗░░██╗░░██╗░██╗░░░██╗░███████╗
// ░██║░░██╗░░██║░██║░██║░░░░░░██╔══██╗░╚██╗██╔╝░╚██╗░██╔╝░╚════██║
// ░╚██╗████╗██╔╝░██║░██║░░░░░░██║░░██║░░╚███╔╝░░░╚████╔╝░░░░███╔═╝
// ░░████╔═████║░░██║░██║░░░░░░██║░░██║░░██╔██╗░░░░╚██╔╝░░░██╔══╝░░
// ░░╚██╔╝░╚██╔╝░░██║░███████╗░██████╔╝░██╔╝╚██╗░░░░██║░░░░███████╗
// ░░░╚═╝░░░╚═╝░░░╚═╝░╚══════╝░╚═════╝░░╚═╝░░╚═╝░░░░╚═╝░░░░╚══════╝

// It ain't much, but it's honest work.

pragma solidity ^0.8.17;

import '@openzeppelin/contracts/access/Ownable.sol';
import '@openzeppelin/contracts/security/Pausable.sol';
import '@openzeppelin/contracts/security/ReentrancyGuard.sol';
import '@openzeppelin/contracts/utils/cryptography/ECDSA.sol';

import '@openzeppelin/contracts/utils/math/Math.sol';

import '../WildNFT.sol';

import '../minter/utils/IOasis.sol';
import '../minter/utils/ISanctionsList.sol';

import './IWildXYZMinter.sol';

contract WildXYZMinterPresale is IWildXYZMinter, Ownable, Pausable, ReentrancyGuard {
  // private variables

  mapping(uint256 => Group) private groups;
  uint256 private numGroups;

  /// @dev One-time variable used to set up the contract.
  bool private isSetup = false;

  mapping(uint256 => uint8) private oasisPassMints;

  // public variables

  // presale variables

  struct PresaleMinterInfo {
    State minterState;
    bool isPresaleLive;
    uint256 maxSupply;
    uint256 totalSupply;
    uint256 presaleMaxSupply;
    uint256 presaleTotalSupply;
    uint256 maxPerOasis;
    uint256 maxPerAddress;
    address allowlistSigner;
    Group[] groups;
  }

  uint256 public presaleMaxSupply;
  uint256 public presaleTotalSupply;

  uint256 public numPresaleMints;

  uint256 public presaleStartTime;
  uint256 public presaleEndTime;

  uint256 public presaleGroupIdOasis;
  uint256 public presaleGroupIdAllowlist;

  struct PresalePurchaseInfo {
    address owner;
    uint256 amount;
    uint256 value;
    bool processed;
    uint256 amountProcessed;
  }
  // mapping(uint256 => PresalePurchaseInfo) public presalePurchaseInfo;
  mapping(address => PresalePurchaseInfo) public presalePurchaseInfo;
  address[] public presalePurchaseOwners;
  uint256 public numPresalePurchaseOwners;

  uint256 private constant maxNFTsPerTransaction = 20;

  // mapping(address => uint256) public presaleAddressTotalSupply;

  event PresalePurchase(address indexed owner, uint256 indexed amount, uint256 value, MintType mintType);

  event PresalePurchaseProcessed(address indexed owner, uint256[] tokenIds);

  /// @notice Emitted when we have already processed a presale purchase for minting the actual nft
  error AlreadyProcessedPresalePurchase();

  error PresalePurchaseNotFound();

  error InvalidAllowlistType();

  /// @notice Emitted when the requesting minter is not on an allowlist (either wild allowlist, oasis holder or allowlisted NFT holder)
  error NotOnAllowlist(address _receiver);

  // drop variables

  /// @notice Max supply of NFTs available. Same as NFT contract.
  uint256 public maxSupply;

  /// @notice Wildxyz royalty percentage.
  /// @dev Wildxyz royalty is `wildRoyalty`%. Artist royalty is `100 - wildRoyalty`% (100 - wildRoyalty).
  uint256 public wildRoyalty;

  /// @notice Royalty total denominator.
  uint256 public royaltyTotal = 100;

  /// @notice Wildxyz royalty wallet
  /// @dev This is the wallet that will receive the `wildRoyalty`% of the primary sale eth.
  address payable public wildWallet;

  /// @notice Artist royalty wallet
  /// @dev This is the wallet that will receive the `100 - wildRoyalty`% of the primary sale eth.
  address payable public artistWallet;

  /// @notice The contract admin address.
  address public admin;

  /// @notice The WildNFT contract address.
  WildNFT public nft;

  /// @notice The OFAC sanctions list contract address.
  /// @dev Used to block unsanctioned addresses from minting NFTs.
  ISanctionsList public sanctionsList;

  /// @notice Oasis NFT address.
  IOasis public oasis;

  /// @notice The DelegateCash registry address.
  IDelegationRegistry public delegationRegistry = IDelegationRegistry(0x00000000000076A84feF008CDAbe6409d2FE638B);

  // minter variables

  /// @notice The admin signature signer address.
  address public adminSigner;

  /// @notice The total number of promo minted tokens.
  uint256 public promoMintTotalSupply = 0;

  uint256 public maxPerAddress;

  uint256 public groupIdOasis;
  uint256 public groupIdAllowlist;
  uint256 public groupIdPublicSale;

  mapping(uint256 => address) allowlistedERC721Addresses;
  uint256 public numAllowlistedERC721Addresses;

  mapping(address => uint256) public addressTotalSupply;

  // modifiers

  modifier setupOnce() {
    if (isSetup) revert AlreadySetup();
    isSetup = true;
    _;
  }

  modifier onlyAdmin() {
    if (msg.sender != admin) revert OnlyAdmin();
    _;
  }

  modifier onlyLive() {
    if (getState() != State.Live) revert NotLive();
    _;
  }

  modifier validGroup(uint256 _groupId) {
    _validGroup(_groupId);
    _;
  }

  modifier validateSigner(address _address, bytes memory _signature) {
    if (!verifySignature(_address, _signature)) revert InvalidSignature(_signature);
    _;
  }

  modifier onlyUnsanctioned(address _to) {
    if (sanctionsList.isSanctioned(_to)) revert SanctionedAddress(_to);
    _;
  }

  modifier onlyDelegated(address _vault, address _contract) {
    if (!delegationRegistry.checkDelegateForContract(msg.sender, _vault, _contract)) revert NotDelegated(msg.sender, _vault, _contract);
    _;
  }

  modifier nonZeroAmount(uint256 _amount) {
    _nonZeroAmount(_amount);
    _;
  }

  // modifier validation hooks

  modifier validAllowlistPresalePurchase(address _receiver, uint256 _amount) {
    _validAllowlistPresalePurchase(_receiver, _amount);
    _;
  }

  modifier validOasisPresalePurchase(
    address _receiver,
    address _vault,
    uint256 _amount
  ) {
    _validOasisPresalePurchase(_receiver, _vault, _amount);
    _;
  }

  modifier validOasisMint(
    address _receiver,
    address _vault,
    uint256 _amount
  ) {
    _validOasisMint(_receiver, _vault, _amount);
    _;
  }

  modifier validAllowlistMint(address _receiver, uint256 _amount) {
    _validAllowlistMint(_receiver, _amount);
    _;
  }

  modifier validPublicSaleMint(address _receiver, uint256 _amount) {
    _validPublicSaleMint(_receiver, _amount);
    _;
  }

  /** @notice BaseMinter constructor
   * @param _maxSupply The max supply of the NFT (same as WildNFT)
   * @param _wildRoyalty The royalty percentage for Wildxyz
   * @param _wildWallet The wallet address for Wildxyz
   * @param _artistWallet The wallet address for the artist
   * @param _admin The admin address
   * @param _sanctions The sanctions list contract address
   * @param _nft The WildNFT contract address
   */
  constructor(uint256 _maxSupply, uint256 _wildRoyalty, address _wildWallet, address _artistWallet, address _admin, ISanctionsList _sanctions, WildNFT _nft) {
    maxSupply = _maxSupply;
    wildRoyalty = _wildRoyalty;
    wildWallet = payable(_wildWallet);
    artistWallet = payable(_artistWallet);
    admin = _admin;
    sanctionsList = _sanctions;
    nft = _nft;
  }

  // internal functions

  function _createGroup(string memory _name, uint256 _startTime, uint256 _endTime, uint256 _price) internal onlyOwner returns (uint256 groupId) {
    groupId = numGroups;

    groups[groupId] = Group(_name, groupId, _startTime, _endTime, _price);

    numGroups++;
  }

  // function validation hooks

  function _isGroupLive(uint256 _groupId) internal view returns (bool) {
    return block.timestamp >= groups[_groupId].startTime && (groups[_groupId].endTime == 0 || block.timestamp < groups[_groupId].endTime);
  }

  function _nonZeroAmount(uint256 _amount) internal pure {
    if (_amount < 1) revert ZeroAmount();
  }

  function _validGroup(uint256 _groupId) internal view {
    if (_groupId >= numGroups) revert GroupDoesNotExist(_groupId);
  }

  function _groupAllowed(uint256 _group) internal view {
    if (!_isGroupLive(_group)) revert GroupNotLive(_group);
  }

  function _validPrice(uint256 _amount, uint256 _groupId) internal view {
    if (msg.value < _amount * groups[_groupId].price) revert InsufficientFunds();
  }

  function _validSupply(uint256 _amount) internal view {
    uint256 supplyRemaining = maxSupply - _nftTotalSupply() - (presaleTotalSupply - numPresaleMints);

    if (_amount > supplyRemaining) revert MaxSupplyExceeded();
  }

  function _validMaxPerTransaction(address _receiver, uint256 _amount) internal view {
    if (_amount > maxPerAddress) revert MaxPerAddressExceeded(_receiver, _amount);
  }

  function _validGroupPriceSupply(uint256 _groupId, uint256 _amount) internal view {
    _groupAllowed(_groupId);
    _validPrice(_amount, _groupId);
    _validSupply(_amount);
    _validMaxPerTransaction(msg.sender, _amount);
  }

  function _validPresaleSupply(uint256 _amount) internal view {
    if (presaleTotalSupply + _amount > presaleMaxSupply) revert MaxSupplyExceeded();
  }

  function _validPresaleGroupPriceSupply(uint256 _groupId, uint256 _amount) internal view {
    _groupAllowed(_groupId);
    _validPrice(_amount, _groupId);
    _validPresaleSupply(_amount);
    _validMaxPerTransaction(msg.sender, _amount);
  }

  // public mint validation hooks

  function _validOasisPresalePurchase(address /*_receiver*/, address _vault, uint256 _amount) internal virtual {
    // check oasis ownership
    if (oasis.balanceOf(_vault) == 0) revert ZeroOasisAllowance(_vault);

    _validPresaleGroupPriceSupply(presaleGroupIdOasis, _amount);
  }

  function _validAllowlistPresalePurchase(address /*_receiver*/, uint256 _amount) internal virtual {
    _validPresaleGroupPriceSupply(presaleGroupIdAllowlist, _amount);
  }

  function _validAllowlistMint(address /*_receiver*/, uint256 _amount) internal virtual {
    _validGroupPriceSupply(groupIdAllowlist, _amount);
  }

  function _validOasisMint(address /*_receiver*/, address _vault, uint256 _amount) internal virtual {
    // check oasis ownership
    if (oasis.balanceOf(_vault) == 0) revert ZeroOasisAllowance(_vault);

    _validGroupPriceSupply(groupIdOasis, _amount);
  }

  function _validPublicSaleMint(address /*_receiver*/, uint256 _amount) internal virtual {
    _validGroupPriceSupply(groupIdPublicSale, _amount);
  }

  function _mapAllowlistTypeToMintType(uint256 _allowlistType) internal pure returns (MintType) {
    if (_allowlistType == 1) {
      return MintType.Allowlist;
    } else if (_allowlistType == 2) {
      return MintType.ArtistAllowlist;
    }

    revert InvalidAllowlistType();
  }

  function _isAllowlisted(address _receiver, bytes memory _signature) internal view returns (uint256) {
    // check signer is valid or not
    if (verifySignature(_receiver, _signature)) {
      return 1;
    }

    // check allowlisted NFT ownership
    for (uint256 i = 0; i < numAllowlistedERC721Addresses; i++) {
      address nftAddress = allowlistedERC721Addresses[i];
      if (nftAddress != address(0)) {
        if (IERC721(nftAddress).balanceOf(_receiver) > 0) {
          return 2;
        }
      }
    }

    return 0;
  }

  // on pre-sale puchase hook

  function _onPresalePurchase(address _receiver, uint256 _amount, MintType _mintType) internal virtual {
    PresalePurchaseInfo storage purchaseInfo = presalePurchaseInfo[_receiver];

    if (purchaseInfo.owner == address(0)) {
      purchaseInfo.owner = _receiver;

      presalePurchaseOwners.push(_receiver);

      numPresalePurchaseOwners++;
    }

    purchaseInfo.amount += _amount;
    purchaseInfo.value += msg.value;

    presaleTotalSupply += _amount;

    emit PresalePurchase(_receiver, _amount, msg.value, _mintType);
  }

  // on-mint hooks

  function _onPromoMint(address _receiver, uint256[] memory _tokenIds, MintType _mintType) internal virtual {
    promoMintTotalSupply += _tokenIds.length;

    emit TokenMint(_receiver, _tokenIds, _mintType, msg.value, false, address(0), false, new uint256[](0));
  }

  function _onAllowlistMint(address _receiver, uint256[] memory _tokenIds, MintType _mintType) internal virtual {
    _addAddressTotalSupply(_receiver, _tokenIds.length);

    emit TokenMint(_receiver, _tokenIds, _mintType, msg.value, false, address(0), false, new uint256[](0));
  }

  function _onOasisMint(address _receiver, uint256[] memory _tokenIds) internal virtual {
    _addAddressTotalSupply(_receiver, _tokenIds.length);

    emit TokenMint(_receiver, _tokenIds, MintType.Oasis, msg.value, false, address(0), true, new uint256[](0));
  }

  function _onOasisMintDelegated(address _receiver, address _vault, uint256[] memory _tokenIds) internal virtual {
    _addAddressTotalSupply(_receiver, _tokenIds.length);

    emit TokenMint(_receiver, _tokenIds, MintType.Oasis, msg.value, true, _vault, true, new uint256[](0));
  }

  function _onPublicSaleMint(address _receiver, uint256[] memory _tokenIds) internal virtual {
    _addAddressTotalSupply(_receiver, _tokenIds.length);

    emit TokenMint(_receiver, _tokenIds, MintType.PublicSale, msg.value, false, address(0), false, new uint256[](0));
  }

  // helpers

  /// @dev Withdraws the funds to wild and artist wallets acconting for royalty fees. Only callable by owner.
  function _withdraw() internal virtual {
    // send a fraction of the balance to wild first
    if (wildRoyalty > 0) {
      (bool successWild, ) = wildWallet.call{value: ((address(this).balance * wildRoyalty) / royaltyTotal)}('');
      if (!successWild) revert FailedToWithdraw('wild', wildWallet);
    }

    // then, send the rest to payee
    (bool successPayee, ) = artistWallet.call{value: address(this).balance}('');
    if (!successPayee) revert FailedToWithdraw('artist', artistWallet);
  }

  /// @dev Sets the admin signer address.
  function _setAdminSigner(address _adminSigner) internal {
    adminSigner = _adminSigner;
  }

  /// @dev Wraps the nft.totalSupply call.
  function _nftTotalSupply() internal view virtual returns (uint256) {
    return nft.totalSupply();
  }

  /** @dev Internal mint function. Use if minting only 1 token.
   * @param _receiver Token receiver address.
   * @return tokenId Newly minted Token ID.
   */
  function _mint(address _receiver) internal virtual returns (uint256 tokenId) {
    tokenId = nft.mint(_receiver);
  }

  /** @dev Internal mint multiple function. Use if minting more than 1 token.
   * @param _receiver Token receiver address.
   * @param _amount Amount to mint.
   * @return tokenIds Newly minted Token IDs.
   */
  function _mintMultiple(address _receiver, uint256 _amount) internal virtual returns (uint256[] memory tokenIds) {
    tokenIds = new uint256[](_amount);

    for (uint256 i = 0; i < _amount; i++) {
      uint256 tokenId = nft.mint(_receiver);
      tokenIds[i] = tokenId;
    }
  }

  function _addAddressTotalSupply(address _receiver, uint256 _amount) internal {
    addressTotalSupply[_receiver] += _amount;
  }

  function _promoMint(address _receiver, uint256 _amount, MintType _mintType) internal {
    uint256[] memory tokenIds = _mintMultiple(_receiver, _amount);

    _onPromoMint(_receiver, tokenIds, _mintType);
  }

  function _promoMintBatch(address[] memory _receiver, uint256[] memory _amounts, MintType _mintType) internal {
    if (_receiver.length == 0 || _receiver.length != _amounts.length) revert ArraySizeMismatch();

    // sum amounts to validate total supply
    uint256 totalAmount = 0;
    for (uint256 i = 0; i < _amounts.length; i++) {
      totalAmount += _amounts[i];
    }

    _validSupply(totalAmount);

    for (uint256 i = 0; i < _receiver.length; i++) {
      address to = _receiver[i];
      uint256 amount = _amounts[i];

      uint256[] memory tokenIds = _mintMultiple(to, amount);

      _onPromoMint(to, tokenIds, _mintType);
    }
  }

  function _isPresaleGroup(uint256 _groupId) internal view returns (bool) {
    return _groupId == presaleGroupIdOasis || _groupId == presaleGroupIdAllowlist;
  }

  function _isPresaleLive() internal view returns (bool) {
    return block.timestamp >= presaleStartTime && block.timestamp < presaleEndTime;
  }

  // public admin-only functions

  function setupMinter(uint256[2] memory _startTimes, uint256 _salePrice, uint256 _presaleMaxSupply, uint256 _presaleStartTime, uint256 _presaleEndTime, uint256 _presalePrice, uint256 _maxPerAddress, address _allowlistSigner, IOasis _oasis, address[] memory _allowlistedERC721Addresses) public setupOnce onlyOwner {
    presaleMaxSupply = _presaleMaxSupply;
    presaleStartTime = _presaleStartTime;
    presaleEndTime = _presaleEndTime;

    presaleGroupIdOasis = _createGroup('Presale Oasis', _presaleStartTime, _presaleEndTime, _presalePrice);
    presaleGroupIdAllowlist = _createGroup('Presale Allowlist', _presaleStartTime, _presaleEndTime, _presalePrice);

    groupIdOasis = _createGroup('Oasis', _startTimes[0], 0, _salePrice);
    groupIdAllowlist = _createGroup('Allowlist', _startTimes[0], 0, _salePrice);
    groupIdPublicSale = _createGroup('Public Sale', _startTimes[1], 0, _salePrice);

    maxPerAddress = _maxPerAddress;

    for (uint256 i = 0; i < _allowlistedERC721Addresses.length; i++) {
      allowlistedERC721Addresses[i] = _allowlistedERC721Addresses[i];
    }

    _setAdminSigner(_allowlistSigner);
    oasis = _oasis;
  }

  /** @notice Pause the minter.
   * @dev Sets the minter state to Paused and pauses the minter and any mint functions. Only callable by admin.
   */
  function pause() public virtual onlyAdmin {
    _pause();
  }

  /** @notice Unpause the minter.
   * @dev Resumes normal minter state and any mint functions. Only callable by admin.
   */
  function unpause() public virtual onlyAdmin {
    _unpause();
  }

  /** @notice Sets the admin signer address.
   * @dev Can only be called by the contract admin.
   * @param _adminSigner The new admin signer address.
   */
  function setAdminSigner(address _adminSigner) public onlyAdmin {
    if (_adminSigner == address(0)) revert ZeroAddress();

    _setAdminSigner(_adminSigner);
  }

  /** @notice Sets the DelegateCash contract address.
   * @dev Can only be called by the contract admin.
   * @param _delegationRegistry The new delegation registry contract address.
   */
  function setDelegationRegistry(address _delegationRegistry) external onlyAdmin {
    delegationRegistry = IDelegationRegistry(_delegationRegistry);
  }

  /** @notice Sets the max per address.
   * @dev Sets the given max per address. Only callable by admin.
   * @param _maxPerAddress The new max per address.
   */
  function setMaxPerAddress(uint256 _maxPerAddress) public onlyAdmin {
    maxPerAddress = _maxPerAddress;
  }

  /** @notice Sets the group price.
   * @dev Sets the given group price. Only callable by admin.
   * @param _groupId The group ID. Must be a valid group ID.
   * @param _price The new price of the group. Must be non-zero.
   */
  function setGroupPrice(uint256 _groupId, uint256 _price) public virtual validGroup(_groupId) nonZeroAmount(_price) onlyAdmin {
    groups[_groupId].price = _price;
  }

  /** @notice Sets the group start time.
   * @dev Sets the given group start time. Only callable by admin.
   * @param _groupId The group ID. Must be a valid group ID.
   * @param _startTime The new start time of the group.
   */
  function setGroupStartTime(uint256 _groupId, uint256 _startTime) public virtual validGroup(_groupId) onlyAdmin {
    groups[_groupId].startTime = _startTime;
  }

  /** @notice Sets the group end time.
   * @dev Sets the given group end time. Only callable by admin.
   * @param _groupId The group ID. Must be a valid group ID.
   * @param _endTime The new end time of the group.
   */
  function setGroupEndTime(uint256 _groupId, uint256 _endTime) public virtual validGroup(_groupId) onlyAdmin {
    groups[_groupId].endTime = _endTime;
  }

  function setPresaleStartTime(uint256 _presaleStartTime) public onlyAdmin {
    presaleStartTime = _presaleStartTime;

    groups[presaleGroupIdOasis].startTime = _presaleStartTime;
    groups[presaleGroupIdAllowlist].startTime = _presaleStartTime;
  }

  function setPresaleEndTime(uint256 _presaleEndTime) public onlyAdmin {
    presaleEndTime = _presaleEndTime;

    groups[presaleGroupIdOasis].endTime = _presaleEndTime;
    groups[presaleGroupIdAllowlist].endTime = _presaleEndTime;
  }

  // public only-owner functions

  /** @notice Withdraws funds to wild and artist wallets.
   * @dev Withdraws the funds to wild and artist wallets acconting for royalty fees. Only callable by owner.
   */
  function withdraw() public virtual onlyOwner {
    _withdraw();
  }

  function withdrawToOwner() public virtual onlyOwner {
    (bool successWild, ) = wildWallet.call{value: address(this).balance}('');
    if (!successWild) revert FailedToWithdraw('wild', wildWallet);
  }

  function addAllowlistedNFTAddress(address _nftAddress) public onlyOwner {
    allowlistedERC721Addresses[numAllowlistedERC721Addresses++] = _nftAddress;
  }

  function removeAllowlistedNFTAddress(address _nftAddress) public onlyOwner {
    for (uint256 i = 0; i < numAllowlistedERC721Addresses; i++) {
      if (allowlistedERC721Addresses[i] == _nftAddress) {
        allowlistedERC721Addresses[i] = address(0);
      }
    }
  }

  // only-owner presale functions

  function processPresaleMint(uint256 _index) public onlyOwner {
    address receiver = presalePurchaseOwners[_index];

    if (presalePurchaseInfo[receiver].processed) revert AlreadyProcessedPresalePurchase();

    PresalePurchaseInfo storage purchaseInfo = presalePurchaseInfo[receiver];

    uint256 amount = Math.min(maxNFTsPerTransaction, purchaseInfo.amount - purchaseInfo.amountProcessed);

    uint256[] memory tokenIds = _mintMultiple(receiver, amount);

    emit PresalePurchaseProcessed(receiver, tokenIds);

    //if (purchaseInfo.amountProcessed == 0) {
      emit TokenMint(receiver, tokenIds, MintType.PresalePurchase, purchaseInfo.value, false, address(0), false, new uint256[](0));
    //}

    purchaseInfo.amountProcessed += amount;

    // mark as processed if we have processed all tokens
    if (purchaseInfo.amountProcessed == purchaseInfo.amount) {
      purchaseInfo.processed = true;
    }
   
    numPresaleMints += amount;
  }

  function processPresaleMintBatch(uint256 _fromIndex, uint256 _toIndex) public onlyOwner {
    for (uint256 i = _fromIndex; i < _toIndex; i++) {
      processPresaleMint(i);
    }
  }

  /*function revokePresalePurchase(uint256 _tokenId) public onlyOwner {
    PresalePurchaseInfo storage purchaseInfo = presalePurchaseInfo[_tokenId];

    if (purchaseInfo.processed) revert AlreadyProcessedPresalePurchase();

    purchaseInfo.processed = true;

    addressTotalSupply[purchaseInfo.owner] -= 1;

    presaleTotalSupply += 1;
  }

  function refundPresalePurchase(uint256 _tokenId) public onlyOwner {
    PresalePurchaseInfo storage purchaseInfo = presalePurchaseInfo[_tokenId];

    if (purchaseInfo.processed) revert AlreadyProcessedPresalePurchase();

    address payable receiver = payable(purchaseInfo.owner);
    uint256 price = purchaseInfo.price;

    (bool success, ) = receiver.call{value: price}('');
    if(!success) revert FailedToWithdraw('presale', receiver);

    purchaseInfo.processed = true;

    addressTotalSupply[purchaseInfo.owner] -= 1;

    presaleTotalSupply += 1;
  }*/

  // public functions

  /** @notice Get the current minter state.
   * @dev Returns the current minter state. If groups are not directly one after another (ie presale), it is possible to re-enter Setup state.
   * @return state Minter state (0 = Setup, 1 = Live, 2 = Complete, 3 = Paused).
   */
  function getState() public view virtual returns (State) {
    if (paused()) {
      return State.Paused;
    }

    // if sold out, return Complete state
    // NOTE: this would not work with a ReserveAuction where this minter holds the token!!!!
    if (_nftTotalSupply() == maxSupply) {
      return State.Complete;
    }

    // check if we are in any group using _isGroupLive
    // if we are in a group, return Live state
    // note: if groups are not directly one after another (ie presale), it is possible to re-enter Setup state
    for (uint256 i = 0; i < numGroups; i++) {
      if (_isGroupLive(i)) {
        return State.Live;
      }
    }

    return State.Setup;
  }

  function getUserGroup(address _user, bytes memory _signature) public view returns (uint256) {
    bool isPresaleLive = _isPresaleLive();

    if (oasis.balanceOf(_user) > 0) {
      return isPresaleLive ? presaleGroupIdOasis : groupIdOasis;
    }

    if (_isAllowlisted(_user, _signature) > 0) {
      return isPresaleLive ? presaleGroupIdAllowlist : groupIdAllowlist;
    }

    return groupIdPublicSale;
  }

  // returns user allowance: Y
  function getUserGroupAllowance(uint256 _groupId) public view returns (uint256) {
    uint256 supplyRemaining;

    if (_isPresaleGroup(_groupId)) {
      supplyRemaining = presaleMaxSupply - presaleTotalSupply;
    } else {
      supplyRemaining = maxSupply - _nftTotalSupply() - (presaleTotalSupply - numPresaleMints);
    }

    if (supplyRemaining == 0) {
      return 0;
    }

    return Math.min(maxPerAddress, supplyRemaining);
  }

  function getUserGroupTotalSupply(address _user, uint256 _groupId) public view returns (uint256) {
    if (_isPresaleGroup(_groupId)) {
      return presalePurchaseInfo[_user].amount;
    } else {
      return addressTotalSupply[_user];
    }
  }

  function getMinterInfo() public view returns (PresaleMinterInfo memory) {
    Group[] memory _groups = new Group[](numGroups);
    for (uint256 i = 0; i < numGroups; i++) {
      _groups[i] = groups[i];
    }

    return PresaleMinterInfo(getState(), _isPresaleLive(), maxSupply, _nftTotalSupply(), presaleMaxSupply, presaleTotalSupply, maxPerAddress, maxPerAddress, adminSigner, _groups);
  }

  function getUserInfo(address _user, bytes memory _signature) public view returns (UserInfo memory) {
    uint256 userGroupId = getUserGroup(_user, _signature);

    return UserInfo(userGroupId, getUserGroupAllowance(/*_user, */ userGroupId), getUserGroupTotalSupply(_user, userGroupId), _isGroupLive(userGroupId));
  }

  function getUserMinterInfo(address _user, bytes memory _signature) public view returns (UserInfo memory userInfo, PresaleMinterInfo memory minterInfo) {
    userInfo = getUserInfo(_user, _signature);
    minterInfo = getMinterInfo();
  }

  /** @notice Verifies the signature of the signer for a given address.
   * @param _address The address the message was signed for.
   * @param _signature The signature to verify.
   * @return valid True if the signature is valid, false otherwise.
   */
  function verifySignature(address _address, bytes memory _signature) public view returns (bool valid) {
    if (_signature.length == 65) {
      // we pass the uers _address and this contracts address to
      // verify that it is intended for this contract specifically
      bytes32 addressHash = keccak256(abi.encodePacked(_address, address(this)));
      bytes32 message = ECDSA.toEthSignedMessageHash(addressHash);
      address signerAddress = ECDSA.recover(message, _signature);

      return (signerAddress != address(0) && signerAddress == adminSigner);
    } else {
      return false;
    }
  }

  function getGroups() public view returns (Group[] memory _groups) {
    _groups = new Group[](numGroups);
    for (uint256 i = 0; i < numGroups; i++) {
      _groups[i] = groups[i];
    }
  }

  function getGroup(uint256 _groupId) public view validGroup(_groupId) returns (Group memory) {
    return groups[_groupId];
  }

  function getGroupStartTime(uint256 _groupId) public view validGroup(_groupId) returns (uint256) {
    return groups[_groupId].startTime;
  }

  function getGroupEndTime(uint256 _groupId) public view validGroup(_groupId) returns (uint256) {
    return groups[_groupId].endTime;
  }

  function getGroupPrice(uint256 _groupId) public view validGroup(_groupId) returns (uint256) {
    return groups[_groupId].price;
  }

  // mint functions

  // promo minting

  function promoMint(address _receiver, uint256 _amount, MintType _mintType) external onlyAdmin nonZeroAmount(_amount) {
    _promoMint(_receiver, _amount, _mintType);
  }

  function promoMintBatch(address[] memory _receiver, uint256[] memory _amounts, MintType _mintType) external onlyAdmin {
    _promoMintBatch(_receiver, _amounts, _mintType);
  }

  // public presale purchase

  function allowlistPresalePurchase(uint256 _amount, bytes memory _signature)
    public payable virtual
    onlyUnsanctioned(msg.sender)
    whenNotPaused
    nonReentrant
    onlyLive
    validAllowlistPresalePurchase(msg.sender, _amount)
  {
    uint256 allowlistType = _isAllowlisted(msg.sender, _signature);
    if (allowlistType == 0) revert NotOnAllowlist(msg.sender);

    MintType mintType = _mapAllowlistTypeToMintType(allowlistType);

    _onPresalePurchase(msg.sender, _amount, mintType);
  }

  function oasisPresalePurchase(uint256 _amount)
    public payable virtual
    onlyUnsanctioned(msg.sender)
    whenNotPaused
    nonReentrant
    onlyLive
    validOasisPresalePurchase(msg.sender, msg.sender, _amount)
  {
    _onPresalePurchase(msg.sender, _amount, MintType.Oasis);
  }

  function oasisPresalePurchaseDelegated(uint256 _amount, address _vault)
    public payable virtual
    onlyUnsanctioned(msg.sender)
    whenNotPaused
    nonReentrant
    onlyLive
    onlyDelegated(_vault, address(oasis))
    validOasisPresalePurchase(msg.sender, _vault, _amount)
  {
    _onPresalePurchase(msg.sender, _amount, MintType.Oasis);
  }

  // public minting

  function allowlistMint(uint256 _amount, bytes memory _signature)
    public payable virtual
    onlyUnsanctioned(msg.sender)
    whenNotPaused
    nonReentrant
    onlyLive
    validAllowlistMint(msg.sender, _amount)
  {
    uint256 allowlistType = _isAllowlisted(msg.sender, _signature);
    if (allowlistType == 0) revert NotOnAllowlist(msg.sender);

    MintType mintType = _mapAllowlistTypeToMintType(allowlistType);

    uint256[] memory tokenIds = _mintMultiple(msg.sender, _amount);

    _onAllowlistMint(msg.sender, tokenIds, mintType);
  }

  function oasisMint(uint256 _amount)
    public payable virtual
    onlyUnsanctioned(msg.sender)
    whenNotPaused
    nonReentrant
    onlyLive
    validOasisMint(msg.sender, msg.sender, _amount)
  {
    uint256[] memory tokenIds = _mintMultiple(msg.sender, _amount);

    _onOasisMint(msg.sender, tokenIds);
  }

  function oasisMintDelegated(uint256 _amount, address _vault)
    public payable virtual
    onlyUnsanctioned(msg.sender)
    whenNotPaused
    nonReentrant
    onlyLive
    onlyDelegated(_vault, address(oasis))
    validOasisMint(msg.sender, _vault, _amount)
  {
    uint256[] memory tokenIds = _mintMultiple(msg.sender, _amount);

    _onOasisMintDelegated(msg.sender, _vault, tokenIds);
  }

  function publicSaleMint(uint256 _amount)
    public payable virtual
    onlyUnsanctioned(msg.sender)
    whenNotPaused
    nonReentrant
    onlyLive
    validPublicSaleMint(msg.sender, _amount)
  {
    uint256[] memory tokenIds = _mintMultiple(msg.sender, _amount);

    _onPublicSaleMint(msg.sender, tokenIds);
  }
}

// File: contracts/artist/common/WildNFT.sol



// SPDX-License-Identifier: GPL-3.0
// LICENSE
// This is a modified version of the original code from the
// NounsToken.sol— an implementation of OpenZeppelin's ERC-721:
// https://github.com/nounsDAO/nouns-monorepo/blob/master/packages/nouns-contracts/contracts/NounsToken.sol
// The original code is licensed under the GPL-3.0 license
// Thank you to the Nouns team for the inspiration and code!

pragma solidity ^0.8.6;

import {UpdatableOperatorFilterer} from 'operator-filter-registry/src/UpdatableOperatorFilterer.sol';
import {RevokableDefaultOperatorFilterer} from 'operator-filter-registry/src/RevokableDefaultOperatorFilterer.sol';

import {Ownable} from '@openzeppelin/contracts/access/Ownable.sol';
import {Strings} from '@openzeppelin/contracts/utils/Strings.sol';
import {Base64} from '@openzeppelin/contracts/utils/Base64.sol';
import {Math} from '@openzeppelin/contracts/utils/math/Math.sol';

import {IERC721} from '@openzeppelin/contracts/token/ERC721/IERC721.sol';
import {ERC721} from '@openzeppelin/contracts/token/ERC721/ERC721.sol';

import {ERC2981} from '@openzeppelin/contracts/token/common/ERC2981.sol';

import {IERC165} from '@openzeppelin/contracts/utils/introspection/IERC165.sol';

import {PaymentSplitter} from '@openzeppelin/contracts/finance/PaymentSplitter.sol';

import {WildNFT} from './WildNFT.sol';

interface IWildNFT is IERC721 {
  event TokenCreated(uint256 indexed tokenId, address mintedTo);
  event TokenBurned(uint256 indexed tokenId);
  event MetadataUpdate(uint256 _tokenId);
  event BatchMetadataUpdate(uint256 _fromTokenId, uint256 _toTokenId);

  function mint(address _to) external returns (uint256);

  function burn(uint256 tokenId) external;

  function setMinter(address minter) external;

  function setBaseURI(string memory _newBaseURI) external;

  function totalSupply() external view returns (uint256);

  function maxSupply() external view returns (uint256);
}

abstract contract WildNFT is IWildNFT, Ownable, RevokableDefaultOperatorFilterer, ERC721, ERC2981, PaymentSplitter {
  // An address who has permissions to mint qf tokens
  address public minter;

  // Mapping of operators to whether they are approved or not
  mapping(address => bool) public authorized;

  // Mapping of addresses flagged for denying token interactions
  mapping(address => bool) public blockList;
  uint256 public _currentTokenId;
  uint256 public maxSupply;
  string public baseURI;

  constructor(string memory name_, string memory symbol_, address _minter, uint256 _maxSupply, string memory _baseURI, address[] memory _payees, uint256[] memory _shares, uint96 _feeNumerator) PaymentSplitter(_payees, _shares) ERC721(name_, symbol_) {
    minter = _minter;
    maxSupply = _maxSupply;
    baseURI = _baseURI;
    _setDefaultRoyalty(address(this), _feeNumerator);
  }

  function supportsInterface(bytes4 interfaceId) public view virtual override(ERC721, IERC165, ERC2981) returns (bool) {
    return super.supportsInterface(interfaceId);
  }

  /**
   * @notice Require that the sender is the minter.
   */
  modifier onlyMinter() {
    require(msg.sender == minter, 'Sender is not the minter');
    _;
  }

  /**
   * @notice updates the deny list
   * @param flaggedOperator the address to be added to the deny list
   * @param status whether the address is to be added or removed from the deny list
   */
  function updateDenyList(address flaggedOperator, bool status) public onlyOwner {
    _updateDenyList(flaggedOperator, status);
  }

  /*
   * @notice Override isApprovedForAll
   * @param owner The owner of the Nouns
   * @param operator The operator to check if approved
   */
  function isApprovedForAll(address _owner, address operator) public view override(IERC721, ERC721) returns (bool) {
    require(blockList[operator] == false, 'Operator has been denied by contract owner.');

    if (authorized[operator] == true) {
      return true;
    }

    return super.isApprovedForAll(_owner, operator);
  }

  /* OS */
  function setApprovalForAll(address operator, bool approved) public override(IERC721, ERC721) onlyAllowedOperatorApproval(operator) {
    super.setApprovalForAll(operator, approved);
  }

  function approve(address operator, uint256 tokenId) public override(IERC721, ERC721) onlyAllowedOperatorApproval(operator) {
    super.approve(operator, tokenId);
  }

  function transferFrom(address from, address to, uint256 tokenId) public override(IERC721, ERC721) onlyAllowedOperator(from) {
    super.transferFrom(from, to, tokenId);
  }

  function safeTransferFrom(address from, address to, uint256 tokenId) public override(IERC721, ERC721) onlyAllowedOperator(from) {
    super.safeTransferFrom(from, to, tokenId);
  }

  function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory data) public override(IERC721, ERC721) onlyAllowedOperator(from) {
    super.safeTransferFrom(from, to, tokenId, data);
  }

  function owner() public view virtual override(Ownable, UpdatableOperatorFilterer) returns (address) {
    return Ownable.owner();
  }

  /**
   * @notice sets the authorized operators for interacting with the contract
   * @param operator the address to be added to the authorized operators
   * @param approved whether the address is approved or not within authorized operators
   */
  function setAuthorized(address operator, bool approved) public onlyOwner {
    authorized[operator] = approved;
  }

  /**
   * @notice Set the token minter.
   * @dev Only callable by the owner when not locked.
   * @param _minter The address of the new minter.
   */
  function setMinter(address _minter) external onlyOwner {
    minter = _minter;
  }

  /**
   * @notice updates the deny list
   * @param flaggedOperator The address to be approved.
   * @param status True if the operator is approved, false to revoke approval.
   */
  function _updateDenyList(address flaggedOperator, bool status) internal virtual {
    blockList[flaggedOperator] = status;
  }

  /**
   * @notice Mint a token to the given address.
   * @dev Only callable by the minter.
   * @param _to The address to mint the qf token to.
   * @return The ID of the newly minted qf token.
   */
  function mint(address _to) public override onlyMinter returns (uint256) {
    require(_currentTokenId < maxSupply, 'Max supply reached');
    return _mintTo(_to, _currentTokenId++);
  }

  /**
   * @notice Burn a pass.
   * @dev Only callable by the minter.
   * @param tokenId The ID of the qf token to burn.
   */
  function burn(uint256 tokenId) public override onlyMinter {
    _burn(tokenId);
    emit TokenBurned(tokenId);
  }

  /**
   * @notice Set the base URI.
   * @dev Only callable by the owner.
   * @param _newBaseURI The new base URI.
   */
  function setBaseURI(string memory _newBaseURI) public onlyOwner {
    baseURI = _newBaseURI;
    emit BatchMetadataUpdate(0, maxSupply - 1);
  }

  /// @notice Identical to setBaseURI but callable by minter only.
  function setBaseURIMinter(string memory _newBaseURI) public onlyMinter {
    baseURI = _newBaseURI;
    emit BatchMetadataUpdate(0, maxSupply - 1);
  }

  /** @notice Mints a new token
   * @param to: the address of the new owner looking to mint
   * @param tokenId: the token ID
   * @return the ID of the newly minted token
   */
  function _mintTo(address to, uint256 tokenId) internal returns (uint256) {
    _mint(to, tokenId);
    emit TokenCreated(tokenId, to);

    return tokenId;
  }

  function totalSupply() public view returns (uint256) {
    return _currentTokenId;
  }
}

// File: operator-filter-registry/src/IOperatorFilterRegistry.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;

interface IOperatorFilterRegistry {
    /**
     * @notice Returns true if operator is not filtered for a given token, either by address or codeHash. Also returns
     *         true if supplied registrant address is not registered.
     */
    function isOperatorAllowed(address registrant, address operator) external view returns (bool);

    /**
     * @notice Registers an address with the registry. May be called by address itself or by EIP-173 owner.
     */
    function register(address registrant) external;

    /**
     * @notice Registers an address with the registry and "subscribes" to another address's filtered operators and codeHashes.
     */
    function registerAndSubscribe(address registrant, address subscription) external;

    /**
     * @notice Registers an address with the registry and copies the filtered operators and codeHashes from another
     *         address without subscribing.
     */
    function registerAndCopyEntries(address registrant, address registrantToCopy) external;

    /**
     * @notice Unregisters an address with the registry and removes its subscription. May be called by address itself or by EIP-173 owner.
     *         Note that this does not remove any filtered addresses or codeHashes.
     *         Also note that any subscriptions to this registrant will still be active and follow the existing filtered addresses and codehashes.
     */
    function unregister(address addr) external;

    /**
     * @notice Update an operator address for a registered address - when filtered is true, the operator is filtered.
     */
    function updateOperator(address registrant, address operator, bool filtered) external;

    /**
     * @notice Update multiple operators for a registered address - when filtered is true, the operators will be filtered. Reverts on duplicates.
     */
    function updateOperators(address registrant, address[] calldata operators, bool filtered) external;

    /**
     * @notice Update a codeHash for a registered address - when filtered is true, the codeHash is filtered.
     */
    function updateCodeHash(address registrant, bytes32 codehash, bool filtered) external;

    /**
     * @notice Update multiple codeHashes for a registered address - when filtered is true, the codeHashes will be filtered. Reverts on duplicates.
     */
    function updateCodeHashes(address registrant, bytes32[] calldata codeHashes, bool filtered) external;

    /**
     * @notice Subscribe an address to another registrant's filtered operators and codeHashes. Will remove previous
     *         subscription if present.
     *         Note that accounts with subscriptions may go on to subscribe to other accounts - in this case,
     *         subscriptions will not be forwarded. Instead the former subscription's existing entries will still be
     *         used.
     */
    function subscribe(address registrant, address registrantToSubscribe) external;

    /**
     * @notice Unsubscribe an address from its current subscribed registrant, and optionally copy its filtered operators and codeHashes.
     */
    function unsubscribe(address registrant, bool copyExistingEntries) external;

    /**
     * @notice Get the subscription address of a given registrant, if any.
     */
    function subscriptionOf(address addr) external returns (address registrant);

    /**
     * @notice Get the set of addresses subscribed to a given registrant.
     *         Note that order is not guaranteed as updates are made.
     */
    function subscribers(address registrant) external returns (address[] memory);

    /**
     * @notice Get the subscriber at a given index in the set of addresses subscribed to a given registrant.
     *         Note that order is not guaranteed as updates are made.
     */
    function subscriberAt(address registrant, uint256 index) external returns (address);

    /**
     * @notice Copy filtered operators and codeHashes from a different registrantToCopy to addr.
     */
    function copyEntriesOf(address registrant, address registrantToCopy) external;

    /**
     * @notice Returns true if operator is filtered by a given address or its subscription.
     */
    function isOperatorFiltered(address registrant, address operator) external returns (bool);

    /**
     * @notice Returns true if the hash of an address's code is filtered by a given address or its subscription.
     */
    function isCodeHashOfFiltered(address registrant, address operatorWithCode) external returns (bool);

    /**
     * @notice Returns true if a codeHash is filtered by a given address or its subscription.
     */
    function isCodeHashFiltered(address registrant, bytes32 codeHash) external returns (bool);

    /**
     * @notice Returns a list of filtered operators for a given address or its subscription.
     */
    function filteredOperators(address addr) external returns (address[] memory);

    /**
     * @notice Returns the set of filtered codeHashes for a given address or its subscription.
     *         Note that order is not guaranteed as updates are made.
     */
    function filteredCodeHashes(address addr) external returns (bytes32[] memory);

    /**
     * @notice Returns the filtered operator at the given index of the set of filtered operators for a given address or
     *         its subscription.
     *         Note that order is not guaranteed as updates are made.
     */
    function filteredOperatorAt(address registrant, uint256 index) external returns (address);

    /**
     * @notice Returns the filtered codeHash at the given index of the list of filtered codeHashes for a given address or
     *         its subscription.
     *         Note that order is not guaranteed as updates are made.
     */
    function filteredCodeHashAt(address registrant, uint256 index) external returns (bytes32);

    /**
     * @notice Returns true if an address has registered
     */
    function isRegistered(address addr) external returns (bool);

    /**
     * @dev Convenience method to compute the code hash of an arbitrary contract
     */
    function codeHashOf(address addr) external returns (bytes32);
}

// File: operator-filter-registry/src/lib/Constants.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;

address constant CANONICAL_OPERATOR_FILTER_REGISTRY_ADDRESS = 0x000000000000AAeB6D7670E522A718067333cd4E;
address constant CANONICAL_CORI_SUBSCRIPTION = 0x3cc6CddA760b79bAfa08dF41ECFA224f810dCeB6;

// File: operator-filter-registry/src/RevokableDefaultOperatorFilterer.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;

import {RevokableOperatorFilterer} from "./RevokableOperatorFilterer.sol";
import {CANONICAL_CORI_SUBSCRIPTION, CANONICAL_OPERATOR_FILTER_REGISTRY_ADDRESS} from "./lib/Constants.sol";
/**
 * @title  RevokableDefaultOperatorFilterer
 * @notice Inherits from RevokableOperatorFilterer and automatically subscribes to the default OpenSea subscription.
 *         Note that OpenSea will disable creator earnings enforcement if filtered operators begin fulfilling orders
 *         on-chain, eg, if the registry is revoked or bypassed.
 */

abstract contract RevokableDefaultOperatorFilterer is RevokableOperatorFilterer {
    /// @dev The constructor that is called when the contract is being deployed.
    constructor()
        RevokableOperatorFilterer(CANONICAL_OPERATOR_FILTER_REGISTRY_ADDRESS, CANONICAL_CORI_SUBSCRIPTION, true)
    {}
}

// File: operator-filter-registry/src/RevokableOperatorFilterer.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;

import {UpdatableOperatorFilterer} from "./UpdatableOperatorFilterer.sol";
import {IOperatorFilterRegistry} from "./IOperatorFilterRegistry.sol";

/**
 * @title  RevokableOperatorFilterer
 * @notice This contract is meant to allow contracts to permanently skip OperatorFilterRegistry checks if desired. The
 *         Registry itself has an "unregister" function, but if the contract is ownable, the owner can re-register at
 *         any point. As implemented, this abstract contract allows the contract owner to permanently skip the
 *         OperatorFilterRegistry checks by calling revokeOperatorFilterRegistry. Once done, the registry
 *         address cannot be further updated.
 *         Note that OpenSea will still disable creator earnings enforcement if filtered operators begin fulfilling orders
 *         on-chain, eg, if the registry is revoked or bypassed.
 */
abstract contract RevokableOperatorFilterer is UpdatableOperatorFilterer {
    /// @dev Emitted when the registry has already been revoked.
    error RegistryHasBeenRevoked();
    /// @dev Emitted when the initial registry address is attempted to be set to the zero address.
    error InitialRegistryAddressCannotBeZeroAddress();

    event OperatorFilterRegistryRevoked();

    bool public isOperatorFilterRegistryRevoked;

    /// @dev The constructor that is called when the contract is being deployed.
    constructor(address _registry, address subscriptionOrRegistrantToCopy, bool subscribe)
        UpdatableOperatorFilterer(_registry, subscriptionOrRegistrantToCopy, subscribe)
    {
        // don't allow creating a contract with a permanently revoked registry
        if (_registry == address(0)) {
            revert InitialRegistryAddressCannotBeZeroAddress();
        }
    }

    /**
     * @notice Update the address that the contract will make OperatorFilter checks against. When set to the zero
     *         address, checks will be permanently bypassed, and the address cannot be updated again. OnlyOwner.
     */
    function updateOperatorFilterRegistryAddress(address newRegistry) public override {
        if (msg.sender != owner()) {
            revert OnlyOwner();
        }
        // if registry has been revoked, do not allow further updates
        if (isOperatorFilterRegistryRevoked) {
            revert RegistryHasBeenRevoked();
        }

        operatorFilterRegistry = IOperatorFilterRegistry(newRegistry);
        emit OperatorFilterRegistryAddressUpdated(newRegistry);
    }

    /**
     * @notice Revoke the OperatorFilterRegistry address, permanently bypassing checks. OnlyOwner.
     */
    function revokeOperatorFilterRegistry() public {
        if (msg.sender != owner()) {
            revert OnlyOwner();
        }
        // if registry has been revoked, do not allow further updates
        if (isOperatorFilterRegistryRevoked) {
            revert RegistryHasBeenRevoked();
        }

        // set to zero address to bypass checks
        operatorFilterRegistry = IOperatorFilterRegistry(address(0));
        isOperatorFilterRegistryRevoked = true;
        emit OperatorFilterRegistryRevoked();
    }
}

// File: operator-filter-registry/src/UpdatableOperatorFilterer.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;

import {IOperatorFilterRegistry} from "./IOperatorFilterRegistry.sol";

/**
 * @title  UpdatableOperatorFilterer
 * @notice Abstract contract whose constructor automatically registers and optionally subscribes to or copies another
 *         registrant's entries in the OperatorFilterRegistry. This contract allows the Owner to update the
 *         OperatorFilterRegistry address via updateOperatorFilterRegistryAddress, including to the zero address,
 *         which will bypass registry checks.
 *         Note that OpenSea will still disable creator earnings enforcement if filtered operators begin fulfilling orders
 *         on-chain, eg, if the registry is revoked or bypassed.
 * @dev    This smart contract is meant to be inherited by token contracts so they can use the following:
 *         - `onlyAllowedOperator` modifier for `transferFrom` and `safeTransferFrom` methods.
 *         - `onlyAllowedOperatorApproval` modifier for `approve` and `setApprovalForAll` methods.
 */
abstract contract UpdatableOperatorFilterer {
    /// @dev Emitted when an operator is not allowed.
    error OperatorNotAllowed(address operator);
    /// @dev Emitted when someone other than the owner is trying to call an only owner function.
    error OnlyOwner();

    event OperatorFilterRegistryAddressUpdated(address newRegistry);

    IOperatorFilterRegistry public operatorFilterRegistry;

    /// @dev The constructor that is called when the contract is being deployed.
    constructor(address _registry, address subscriptionOrRegistrantToCopy, bool subscribe) {
        IOperatorFilterRegistry registry = IOperatorFilterRegistry(_registry);
        operatorFilterRegistry = registry;
        // If an inheriting token contract is deployed to a network without the registry deployed, the modifier
        // will not revert, but the contract will need to be registered with the registry once it is deployed in
        // order for the modifier to filter addresses.
        if (address(registry).code.length > 0) {
            if (subscribe) {
                registry.registerAndSubscribe(address(this), subscriptionOrRegistrantToCopy);
            } else {
                if (subscriptionOrRegistrantToCopy != address(0)) {
                    registry.registerAndCopyEntries(address(this), subscriptionOrRegistrantToCopy);
                } else {
                    registry.register(address(this));
                }
            }
        }
    }

    /**
     * @dev A helper function to check if the operator is allowed.
     */
    modifier onlyAllowedOperator(address from) virtual {
        // Allow spending tokens from addresses with balance
        // Note that this still allows listings and marketplaces with escrow to transfer tokens if transferred
        // from an EOA.
        if (from != msg.sender) {
            _checkFilterOperator(msg.sender);
        }
        _;
    }

    /**
     * @dev A helper function to check if the operator approval is allowed.
     */
    modifier onlyAllowedOperatorApproval(address operator) virtual {
        _checkFilterOperator(operator);
        _;
    }

    /**
     * @notice Update the address that the contract will make OperatorFilter checks against. When set to the zero
     *         address, checks will be bypassed. OnlyOwner.
     */
    function updateOperatorFilterRegistryAddress(address newRegistry) public virtual {
        if (msg.sender != owner()) {
            revert OnlyOwner();
        }
        operatorFilterRegistry = IOperatorFilterRegistry(newRegistry);
        emit OperatorFilterRegistryAddressUpdated(newRegistry);
    }

    /**
     * @dev Assume the contract has an owner, but leave specific Ownable implementation up to inheriting contract.
     */
    function owner() public view virtual returns (address);

    /**
     * @dev A helper function to check if the operator is allowed.
     */
    function _checkFilterOperator(address operator) internal view virtual {
        IOperatorFilterRegistry registry = operatorFilterRegistry;
        // Check registry code length to facilitate testing in environments without a deployed registry.
        if (address(registry) != address(0) && address(registry).code.length > 0) {
            // under normal circumstances, this function will revert rather than return false, but inheriting contracts
            // may specify their own OperatorFilterRegistry implementations, which may behave differently
            if (!registry.isOperatorAllowed(address(this), operator)) {
                revert OperatorNotAllowed(operator);
            }
        }
    }
}