// ⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠿⠿⠿⠿⢿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿
// ⣿⣿⣿⣿⣿⣿⣿⠿⢛⣉⠀⠀⣤⣴⣶⡄⠀⠀⠀⠉⠙⠻⢿⣿⣿⣿⣿⣿⣿⣿
// ⣿⣿⣿⣿⡿⠋⠠⣾⣿⣿⣶⢶⣿⣿⣿⣷⣄⡀⠀⣀⣿⣷⣤⡈⠻⣿⣿⣿⣿⣿
// ⣿⣿⣿⠟⠀⠀⠀⠈⢿⡟⠀⠀⠘⣿⣿⣿⣿⣿⣿⣿⣿⣿⠿⣿⣦⡈⢿⣿⣿⣿
// ⣿⣿⠏⢀⠀⠀⠀⠀⣾⣿⣤⣠⣼⣿⠿⠿⠿⢿⣿⣿⣿⡇⠀⠀⣻⣿⡄⢻⣿⣿
// ⣿⡿⠀⣿⣦⣤⣤⣾⣿⣿⣿⣿⠟⠁⠀⠀⠀⠀⠙⣿⣿⣿⣶⣶⣿⣿⣷⠀⢿⣿
// ⣿⡇⢸⠿⢿⣿⣿⣿⣿⣿⣿⣿⠀⠀⠀⠀⠀⠀⠀⣿⣿⡟⠋⠉⠉⠻⣿⡆⢸⣿
// ⣿⣧⠀⠀⠀⣿⣿⡿⠋⠉⠛⣿⣧⡀⠀⠀⠀⠀⣠⣿⣿⠀⠀⠀⠀⠀⠋⢀⣾⣿
// ⣿⣿⣷⣄⡈⠛⠻⠇⠀⠀⢠⣿⣿⣿⣷⣶⣶⣿⣿⡿⠿⠷⠀⠀⣀⣤⣶⣿⣿⣿
// ⣿⣿⣿⣿⣿⣿⣶⣶⣶⣶⣤⣤⣤⣤⣤⣤⣤⣤⣴⢶⣶⣶⣶⣿⣿⣿⣿⣿⣿⣿
// ⣿⣿⣿⣿⣿⣿⣿⣿⣿⡏⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿
// ⣿⣿⣿⣿⣿⣿⣿⣿⣿⠃⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢹⣿⣿⣿⣿⣿⣿⣿⣿⣿
// ⣿⣿⣿⣿⣿⣿⣿⣿⣿⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢸⣿⣿⣿⣿⣿⣿⣿⣿⣿
// ⣿⣿⣿⣿⣿⣿⣿⣿⣿⣄⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⣼⣿⣿⣿⣿⣿⣿⣿⣿⣿
// ⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣷⣶⣦⣤⣤⣤⣴⣶⣶⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿
// shout outs:
// to dom, timshel, loot community and goblenz for the inspiration
// to msc18, 124, SHZ, og mushroomers and cool guys from thai and nigeria
// to mushrooms つ◕_◕つ 🍄
// =========================
// for the web3 frens with love

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        // Inspired by OraclizeAPI's implementation - MIT licence
        // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol

        if (value == 0) {
            return "0";
        }
        uint256 temp = value;
        uint256 digits;
        while (temp != 0) {
            digits++;
            temp /= 10;
        }
        bytes memory buffer = new bytes(digits);
        while (value != 0) {
            digits -= 1;
            buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
            value /= 10;
        }
        return string(buffer);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        if (value == 0) {
            return "0x00";
        }
        uint256 temp = value;
        uint256 length = 0;
        while (temp != 0) {
            length++;
            temp >>= 8;
        }
        return toHexString(value, length);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
     */
    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = _HEX_SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }
}
// File: ECDSA.sol


// OpenZeppelin Contracts v4.4.1 (utils/cryptography/ECDSA.sol)

pragma solidity ^0.8.0;


/**
 * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
 *
 * These functions can be used to verify that a message was signed by the holder
 * of the private keys of a given address.
 */
library ECDSA {
    enum RecoverError {
        NoError,
        InvalidSignature,
        InvalidSignatureLength,
        InvalidSignatureS,
        InvalidSignatureV
    }

    function _throwError(RecoverError error) private pure {
        if (error == RecoverError.NoError) {
            return; // no error: do nothing
        } else if (error == RecoverError.InvalidSignature) {
            revert("ECDSA: invalid signature");
        } else if (error == RecoverError.InvalidSignatureLength) {
            revert("ECDSA: invalid signature length");
        } else if (error == RecoverError.InvalidSignatureS) {
            revert("ECDSA: invalid signature 's' value");
        } else if (error == RecoverError.InvalidSignatureV) {
            revert("ECDSA: invalid signature 'v' value");
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature` or error string. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     *
     * Documentation for signature generation:
     * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
     * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
     *
     * _Available since v4.3._
     */
    function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {
        // Check the signature length
        // - case 65: r,s,v signature (standard)
        // - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._
        if (signature.length == 65) {
            bytes32 r;
            bytes32 s;
            uint8 v;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            assembly {
                r := mload(add(signature, 0x20))
                s := mload(add(signature, 0x40))
                v := byte(0, mload(add(signature, 0x60)))
            }
            return tryRecover(hash, v, r, s);
        } else if (signature.length == 64) {
            bytes32 r;
            bytes32 vs;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            assembly {
                r := mload(add(signature, 0x20))
                vs := mload(add(signature, 0x40))
            }
            return tryRecover(hash, r, vs);
        } else {
            return (address(0), RecoverError.InvalidSignatureLength);
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature`. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     */
    function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, signature);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
     *
     * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
     *
     * _Available since v4.3._
     */
    function tryRecover(
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal pure returns (address, RecoverError) {
        bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);
        uint8 v = uint8((uint256(vs) >> 255) + 27);
        return tryRecover(hash, v, r, s);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
     *
     * _Available since v4.2._
     */
    function recover(
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, r, vs);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `v`,
     * `r` and `s` signature fields separately.
     *
     * _Available since v4.3._
     */
    function tryRecover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address, RecoverError) {
        // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
        // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
        // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
        // signatures from current libraries generate a unique signature with an s-value in the lower half order.
        //
        // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
        // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
        // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
        // these malleable signatures as well.
        if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
            return (address(0), RecoverError.InvalidSignatureS);
        }
        if (v != 27 && v != 28) {
            return (address(0), RecoverError.InvalidSignatureV);
        }

        // If the signature is valid (and not malleable), return the signer address
        address signer = ecrecover(hash, v, r, s);
        if (signer == address(0)) {
            return (address(0), RecoverError.InvalidSignature);
        }

        return (signer, RecoverError.NoError);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `v`,
     * `r` and `s` signature fields separately.
     */
    function recover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, v, r, s);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from a `hash`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
        // 32 is the length in bytes of hash,
        // enforced by the type signature above
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from `s`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s));
    }

    /**
     * @dev Returns an Ethereum Signed Typed Data, created from a
     * `domainSeparator` and a `structHash`. This produces hash corresponding
     * to the one signed with the
     * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
     * JSON-RPC method as part of EIP-712.
     *
     * See {recover}.
     */
    function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
    }
}
// File: 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: Ownable.sol



pragma solidity ^0.8.0;


/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _setOwner(_msgSender());
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _setOwner(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _setOwner(newOwner);
    }

    function _setOwner(address newOwner) private {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}
// File: Address.sol



pragma solidity ^0.8.0;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        assembly {
            size := extcodesize(account)
        }
        return size > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");

        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        (bool success, bytes memory returndata) = target.staticcall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        (bool success, bytes memory returndata) = target.delegatecall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    function _verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) private pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}
// File: Payment.sol


// OpenZeppelin Contracts v4.4.1 (finance/PaymentSplitter.sol)

pragma solidity ^0.8.0;



/**
 * @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.
 *
 * `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 Payment is Context {
    event PayeeAdded(address account, uint256 shares);
    event PaymentReleased(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;

    /**
     * @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 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 address of the payee number `index`.
     */
    function payee(uint256 index) public view returns (address) {
        return _payees[index];
    }

    /**
     * @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 totalReceived = address(this).balance + totalReleased();
        uint256 payment = _pendingPayment(account, totalReceived, released(account));

        require(payment != 0, "PaymentSplitter: account is not due payment");

        _released[account] += payment;
        _totalReleased += payment;

        Address.sendValue(account, payment);
        emit PaymentReleased(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: IERC721Receiver.sol



pragma solidity ^0.8.0;

/**
 * @title ERC721 token receiver interface
 * @dev Interface for any contract that wants to support safeTransfers
 * from ERC721 asset contracts.
 */
interface IERC721Receiver {
    /**
     * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
     * by `operator` from `from`, this function is called.
     *
     * It must return its Solidity selector to confirm the token transfer.
     * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
     *
     * The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
     */
    function onERC721Received(
        address operator,
        address from,
        uint256 tokenId,
        bytes calldata data
    ) external returns (bytes4);
}
// File: 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: ERC165.sol



pragma solidity ^0.8.0;


/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
 * for the additional interface id that will be supported. For example:
 *
 * ```solidity
 * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
 *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
 * }
 * ```
 *
 * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
 */
abstract contract ERC165 is IERC165 {
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IERC165).interfaceId;
    }
}
// File: IERC721.sol



pragma solidity ^0.8.0;


/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721 is IERC165 {
    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
     */
    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
     */
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    /**
     * @dev Returns the number of tokens in ``owner``'s account.
     */
    function balanceOf(address owner) external view returns (uint256 balance);

    /**
     * @dev Returns the owner of the `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function ownerOf(uint256 tokenId) external view returns (address owner);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Transfers `tokenId` token from `from` to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Gives permission to `to` to transfer `tokenId` token to another account.
     * The approval is cleared when the token is transferred.
     *
     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.
     *
     * Requirements:
     *
     * - The caller must own the token or be an approved operator.
     * - `tokenId` must exist.
     *
     * Emits an {Approval} event.
     */
    function approve(address to, uint256 tokenId) external;

    /**
     * @dev Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) external view returns (address operator);

    /**
     * @dev Approve or remove `operator` as an operator for the caller.
     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
     *
     * Requirements:
     *
     * - The `operator` cannot be the caller.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool _approved) external;

    /**
     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
     *
     * See {setApprovalForAll}
     */
    function isApprovedForAll(address owner, address operator) external view returns (bool);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes calldata data
    ) external;
}
// File: IERC721Enumerable.sol



pragma solidity ^0.8.0;


/**
 * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721Enumerable is IERC721 {
    /**
     * @dev Returns the total amount of tokens stored by the contract.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns a token ID owned by `owner` at a given `index` of its token list.
     * Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
     */
    function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId);

    /**
     * @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
     * Use along with {totalSupply} to enumerate all tokens.
     */
    function tokenByIndex(uint256 index) external view returns (uint256);
}
// File: IERC721Metadata.sol



pragma solidity ^0.8.0;


/**
 * @title ERC-721 Non-Fungible Token Standard, optional metadata extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721Metadata is IERC721 {
    /**
     * @dev Returns the token collection name.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the token collection symbol.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
     */
    function tokenURI(uint256 tokenId) external view returns (string memory);
}
// File: ERC721A.sol


pragma solidity ^0.8.0;









contract ERC721A is Context, ERC165, IERC721, IERC721Metadata, IERC721Enumerable {
    using Address for address;
    using Strings for uint256;

    struct TokenOwnership {
        address addr;
        uint64 startTimestamp;
    }

    struct AddressData {
        uint128 balance;
        uint128 numberMinted;
    }

    uint256 internal currentIndex;

    // Token name
    string private _name;

    // Token symbol
    string private _symbol;

    // Mapping from token ID to ownership details
    // An empty struct value does not necessarily mean the token is unowned. See ownershipOf implementation for details.
    mapping(uint256 => TokenOwnership) internal _ownerships;

    // Mapping owner address to address data
    mapping(address => AddressData) private _addressData;

    // Mapping from token ID to approved address
    mapping(uint256 => address) private _tokenApprovals;

    // Mapping from owner to operator approvals
    mapping(address => mapping(address => bool)) private _operatorApprovals;

    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev See {IERC721Enumerable-totalSupply}.
     */
    function totalSupply() public view override returns (uint256) {
        return currentIndex;
    }

    /**
     * @dev See {IERC721Enumerable-tokenByIndex}.
     */
    function tokenByIndex(uint256 index) public view override returns (uint256) {
        require(index < totalSupply(), 'ERC721A: global index out of bounds');
        return index;
    }

    /**
     * @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
     * This read function is O(totalSupply). If calling from a separate contract, be sure to test gas first.
     * It may also degrade with extremely large collection sizes (e.g >> 10000), test for your use case.
     */
    function tokenOfOwnerByIndex(address owner, uint256 index) public view override returns (uint256) {
        require(index < balanceOf(owner), 'ERC721A: owner index out of bounds');
        uint256 numMintedSoFar = totalSupply();
        uint256 tokenIdsIdx;
        address currOwnershipAddr;

        // Counter overflow is impossible as the loop breaks when uint256 i is equal to another uint256 numMintedSoFar.
        unchecked {
            for (uint256 i; i < numMintedSoFar; i++) {
                TokenOwnership memory ownership = _ownerships[i];
                if (ownership.addr != address(0)) {
                    currOwnershipAddr = ownership.addr;
                }
                if (currOwnershipAddr == owner) {
                    if (tokenIdsIdx == index) {
                        return i;
                    }
                    tokenIdsIdx++;
                }
            }
        }

        revert('ERC721A: unable to get token of owner by index');
    }

    /**
     * @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 ||
            interfaceId == type(IERC721Enumerable).interfaceId ||
            super.supportsInterface(interfaceId);
    }

    /**
     * @dev See {IERC721-balanceOf}.
     */
    function balanceOf(address owner) public view override returns (uint256) {
        require(owner != address(0), 'ERC721A: balance query for the zero address');
        return uint256(_addressData[owner].balance);
    }

    function _numberMinted(address owner) internal view returns (uint256) {
        require(owner != address(0), 'ERC721A: number minted query for the zero address');
        return uint256(_addressData[owner].numberMinted);
    }

    /**
     * Gas spent here starts off proportional to the maximum mint batch size.
     * It gradually moves to O(1) as tokens get transferred around in the collection over time.
     */
    function ownershipOf(uint256 tokenId) internal view returns (TokenOwnership memory) {
        require(_exists(tokenId), 'ERC721A: owner query for nonexistent token');

        unchecked {
            for (uint256 curr = tokenId; curr >= 0; curr--) {
                TokenOwnership memory ownership = _ownerships[curr];
                if (ownership.addr != address(0)) {
                    return ownership;
                }
            }
        }

        revert('ERC721A: unable to determine the owner of token');
    }

    /**
     * @dev See {IERC721-ownerOf}.
     */
    function ownerOf(uint256 tokenId) public view override returns (address) {
        return ownershipOf(tokenId).addr;
    }

    /**
     * @dev See {IERC721Metadata-name}.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev See {IERC721Metadata-symbol}.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev See {IERC721Metadata-tokenURI}.
     */
    function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
        require(_exists(tokenId), 'ERC721Metadata: URI query for nonexistent token');

        string memory baseURI = _baseURI();
        return bytes(baseURI).length != 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : '';
    }

    /**
     * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
     * token will be the concatenation of the `baseURI` and the `tokenId`. Empty
     * by default, can be overriden in child contracts.
     */
    function _baseURI() internal view virtual returns (string memory) {
        return '';
    }

    /**
     * @dev See {IERC721-approve}.
     */
    function approve(address to, uint256 tokenId) public override {
        address owner = ERC721A.ownerOf(tokenId);
        require(to != owner, 'ERC721A: approval to current owner');

        require(
            _msgSender() == owner || isApprovedForAll(owner, _msgSender()),
            'ERC721A: approve caller is not owner nor approved for all'
        );

        _approve(to, tokenId, owner);
    }

    /**
     * @dev See {IERC721-getApproved}.
     */
    function getApproved(uint256 tokenId) public view override returns (address) {
        require(_exists(tokenId), 'ERC721A: approved query for nonexistent token');

        return _tokenApprovals[tokenId];
    }

    /**
     * @dev See {IERC721-setApprovalForAll}.
     */
    function setApprovalForAll(address operator, bool approved) public override {
        require(operator != _msgSender(), 'ERC721A: approve to caller');

        _operatorApprovals[_msgSender()][operator] = approved;
        emit ApprovalForAll(_msgSender(), operator, approved);
    }

    /**
     * @dev See {IERC721-isApprovedForAll}.
     */
    function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
        return _operatorApprovals[owner][operator];
    }

    /**
     * @dev See {IERC721-transferFrom}.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) public override {
        _transfer(from, to, tokenId);
    }

    /**
     * @dev See {IERC721-safeTransferFrom}.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) public override {
        safeTransferFrom(from, to, tokenId, '');
    }

    /**
     * @dev See {IERC721-safeTransferFrom}.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) public override {
        _transfer(from, to, tokenId);
        require(
            _checkOnERC721Received(from, to, tokenId, _data),
            'ERC721A: transfer to non ERC721Receiver implementer'
        );
    }

    /**
     * @dev Returns whether `tokenId` exists.
     *
     * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
     *
     * Tokens start existing when they are minted (`_mint`),
     */
    function _exists(uint256 tokenId) internal view returns (bool) {
        return tokenId < currentIndex;
    }

    function _safeMint(address to, uint256 quantity) internal {
        _safeMint(to, quantity, '');
    }

    /**
     * @dev Safely mints `quantity` tokens and transfers them to `to`.
     *
     * Requirements:
     *
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called for each safe transfer.
     * - `quantity` must be greater than 0.
     *
     * Emits a {Transfer} event.
     */
    function _safeMint(
        address to,
        uint256 quantity,
        bytes memory _data
    ) internal {
        _mint(to, quantity, _data, true);
    }

    /**
     * @dev Mints `quantity` tokens and transfers them to `to`.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - `quantity` must be greater than 0.
     *
     * Emits a {Transfer} event.
     */
    function _mint(
        address to,
        uint256 quantity,
        bytes memory _data,
        bool safe
    ) internal {
        uint256 startTokenId = currentIndex;
        require(to != address(0), 'ERC721A: mint to the zero address');
        require(quantity != 0, 'ERC721A: quantity must be greater than 0');

        _beforeTokenTransfers(address(0), to, startTokenId, quantity);

        // Overflows are incredibly unrealistic.
        // balance or numberMinted overflow if current value of either + quantity > 3.4e38 (2**128) - 1
        // updatedIndex overflows if currentIndex + quantity > 1.56e77 (2**256) - 1
        unchecked {
            _addressData[to].balance += uint128(quantity);
            _addressData[to].numberMinted += uint128(quantity);

            _ownerships[startTokenId].addr = to;
            _ownerships[startTokenId].startTimestamp = uint64(block.timestamp);

            uint256 updatedIndex = startTokenId;

            for (uint256 i; i < quantity; i++) {
                emit Transfer(address(0), to, updatedIndex);
                if (safe) {
                    require(
                        _checkOnERC721Received(address(0), to, updatedIndex, _data),
                        'ERC721A: transfer to non ERC721Receiver implementer'
                    );
                }

                updatedIndex++;
            }

            currentIndex = updatedIndex;
        }

        _afterTokenTransfers(address(0), to, startTokenId, quantity);
    }

    /**
     * @dev Transfers `tokenId` from `from` to `to`.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     *
     * Emits a {Transfer} event.
     */
    function _transfer(
        address from,
        address to,
        uint256 tokenId
    ) private {
        TokenOwnership memory prevOwnership = ownershipOf(tokenId);

        bool isApprovedOrOwner = (_msgSender() == prevOwnership.addr ||
            getApproved(tokenId) == _msgSender() ||
            isApprovedForAll(prevOwnership.addr, _msgSender()));

        require(isApprovedOrOwner, 'ERC721A: transfer caller is not owner nor approved');

        require(prevOwnership.addr == from, 'ERC721A: transfer from incorrect owner');
        require(to != address(0), 'ERC721A: transfer to the zero address');

        _beforeTokenTransfers(from, to, tokenId, 1);

        // Clear approvals from the previous owner
        _approve(address(0), tokenId, prevOwnership.addr);

        // Underflow of the sender's balance is impossible because we check for
        // ownership above and the recipient's balance can't realistically overflow.
        // Counter overflow is incredibly unrealistic as tokenId would have to be 2**256.
        unchecked {
            _addressData[from].balance -= 1;
            _addressData[to].balance += 1;

            _ownerships[tokenId].addr = to;
            _ownerships[tokenId].startTimestamp = uint64(block.timestamp);

            // If the ownership slot of tokenId+1 is not explicitly set, that means the transfer initiator owns it.
            // Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.
            uint256 nextTokenId = tokenId + 1;
            if (_ownerships[nextTokenId].addr == address(0)) {
                if (_exists(nextTokenId)) {
                    _ownerships[nextTokenId].addr = prevOwnership.addr;
                    _ownerships[nextTokenId].startTimestamp = prevOwnership.startTimestamp;
                }
            }
        }

        emit Transfer(from, to, tokenId);
        _afterTokenTransfers(from, to, tokenId, 1);
    }

    /**
     * @dev Approve `to` to operate on `tokenId`
     *
     * Emits a {Approval} event.
     */
    function _approve(
        address to,
        uint256 tokenId,
        address owner
    ) private {
        _tokenApprovals[tokenId] = to;
        emit Approval(owner, to, tokenId);
    }

    /**
     * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target 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(to).onERC721Received.selector;
            } catch (bytes memory reason) {
                if (reason.length == 0) {
                    revert('ERC721A: transfer to non ERC721Receiver implementer');
                } else {
                    assembly {
                        revert(add(32, reason), mload(reason))
                    }
                }
            }
        } else {
            return true;
        }
    }

    /**
     * @dev Hook that is called before a set of serially-ordered token ids are about to be transferred. This includes minting.
     *
     * startTokenId - the first token id to be transferred
     * quantity - the amount to be transferred
     *
     * Calling conditions:
     *
     * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
     * transferred to `to`.
     * - When `from` is zero, `tokenId` will be minted for `to`.
     */
    function _beforeTokenTransfers(
        address from,
        address to,
        uint256 startTokenId,
        uint256 quantity
    ) internal virtual {}

    /**
     * @dev Hook that is called after a set of serially-ordered token ids have been transferred. This includes
     * minting.
     *
     * startTokenId - the first token id to be transferred
     * quantity - the amount to be transferred
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero.
     * - `from` and `to` are never both zero.
     */
    function _afterTokenTransfers(
        address from,
        address to,
        uint256 startTokenId,
        uint256 quantity
    ) internal virtual {}
}

// OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        // On the first call to nonReentrant, _notEntered will be true
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;

        _;

        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }
}



pragma solidity ^0.8.0;

/**********************************************************\
* Author: alxi <chitch@alxi.nl> (https://twitter.com/0xalxi)
* EIP-5050 Token Interaction Standard: [tbd]
*
* Implementation of an interactive token protocol.
/**********************************************************/

/// @title ERC-5050 Token Interaction Standard
/// @dev See https://eips.ethereum.org/EIPS/eip-xxx
interface IERC5050Sender {
    /// @notice Send an action to the target address
    /// @dev The action's `fromContract` is automatically set to `address(this)`,
    /// and the `from` parameter is set to `msg.sender`.
    /// @param action The action to send
    function sendAction(Action memory action) external payable;

    /// @notice Check if an action is valid based on its hash and nonce
    /// @dev When an action passes through all three possible contracts
    /// (`fromContract`, `to`, and `state`) the `state` contract validates the
    /// action with the initating `fromContract` using a nonced action hash.
    /// This hash is calculated and saved to storage on the `fromContract` before
    /// action handling is initiated. The `state` contract calculates the hash
    /// and verifies it and nonce with the `fromContract`.
    /// @param _hash The hash to validate
    /// @param _nonce The nonce to validate
    function isValid(bytes32 _hash, uint256 _nonce) external returns (bool);

    /// @notice Retrieve list of actions that can be sent.
    /// @dev Intended for use by off-chain applications to query compatible contracts,
    /// and to advertise functionality in human-readable form.
    function sendableActions() external view returns (string[] memory);

    /// @notice Change or reaffirm the approved address for an action
    /// @dev The zero address indicates there is no approved address.
    ///  Throws unless `msg.sender` is the `_account`, or an authorized
    ///  operator of the `_account`.
    /// @param _account The account of the account-action pair to approve
    /// @param _action The action of the account-action pair to approve
    /// @param _approved The new approved account-action controller
    function approveForAction(
        address _account,
        bytes4 _action,
        address _approved
    ) external returns (bool);

    /// @notice Enable or disable approval for a third party ("operator") to conduct
    ///  all actions on behalf of `msg.sender`
    /// @dev Emits the ApprovalForAll event. The contract MUST allow
    ///  an unbounded number of operators per owner.
    /// @param _operator Address to add to the set of authorized operators
    /// @param _approved True if the operator is approved, false to revoke approval
    function setApprovalForAllActions(address _operator, bool _approved)
        external;

    /// @notice Get the approved address for an account-action pair
    /// @dev Throws if `_tokenId` is not a valid NFT.
    /// @param _account The account of the account-action to find the approved address for
    /// @param _action The action of the account-action to find the approved address for
    /// @return The approved address for this account-action, or the zero address if
    ///  there is none
    function getApprovedForAction(address _account, bytes4 _action)
        external
        view
        returns (address);

    /// @notice Query if an address is an authorized operator for another address
    /// @param _account The address on whose behalf actions are performed
    /// @param _operator The address that acts on behalf of the account
    /// @return True if `_operator` is an approved operator for `_account`, false otherwise
    function isApprovedForAllActions(address _account, address _operator)
        external
        view
        returns (bool);

    /// @dev This emits when an action is sent (`sendAction()`)
    event SendAction(
        bytes4 indexed name,
        address _from,
        address indexed _fromContract,
        uint256 _tokenId,
        address indexed _to,
        uint256 _toTokenId,
        address _state,
        bytes _data
    );

    /// @dev This emits when the approved address for an account-action pair
    ///  is changed or reaffirmed. The zero address indicates there is no
    ///  approved address.
    event ApprovalForAction(
        address indexed _account,
        bytes4 indexed _action,
        address indexed _approved
    );

    /// @dev This emits when an operator is enabled or disabled for an account.
    ///  The operator can conduct all actions on behalf of the account.
    event ApprovalForAllActions(
        address indexed _account,
        address indexed _operator,
        bool _approved
    );
}

interface IERC5050Receiver {
    /// @notice Handle an action
    /// @dev Both the `to` contract and `state` contract are called via
    /// `onActionReceived()`.
    /// @param action The action to handle
    function onActionReceived(Action calldata action, uint256 _nonce)
        external
        payable;

    /// @notice Retrieve list of actions that can be received.
    /// @dev Intended for use by off-chain applications to query compatible contracts,
    /// and to advertise functionality in human-readable form.
    function receivableActions() external view returns (string[] memory);

    /// @dev This emits when a valid action is received.
    event ActionReceived(
        bytes4 indexed name,
        address _from,
        address indexed _fromContract,
        uint256 _tokenId,
        address indexed _to,
        uint256 _toTokenId,
        address _state,
        bytes _data
    );
}

/// @param _address The address of the interactive object
/// @param tokenId The token that is interacting (optional)
struct Object {
    address _address;
    uint256 _tokenId;
}

/// @param selector The bytes4(keccack256()) encoding of the action string
/// @param user The address of the sender
/// @param from The initiating object
/// @param to The receiving object
/// @param state The state contract
/// @param data Additional data with no specified format
struct Action {
    bytes4 selector;
    address user;
    Object from;
    Object to;
    address state;
    bytes data;
}

// Barely modified version of OpenZeppelin Contracts v4.4.1 (utils/structs/EnumerableSet.sol)

pragma solidity ^0.8.0;

library ActionsSet {
    struct Set {
        // Storage of action names
        string[] _names;
        // Storage of action selectors
        bytes4[] _selectors;
        // Position of the value in the `values` array, plus 1 because index 0
        // means a value is not in the set.
        mapping(bytes4 => uint256) _indexes;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(Set storage set, string memory name) internal returns (bool) {
        bytes4 selector = bytes4(keccak256(bytes(name)));
        if (!contains(set, selector)) {
            set._selectors.push(selector);
            set._names.push(name);
            // The value is stored at length-1, but we add 1 to all indexes
            // and use 0 as a sentinel value
            set._indexes[selector] = set._selectors.length;
            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(Set storage set, bytes4 value) internal returns (bool) {
        // We read and store the value's index to prevent multiple reads from the same storage slot
        uint256 valueIndex = set._indexes[value];

        if (valueIndex != 0) {
            // Equivalent to contains(set, value)
            // To delete an element from the _selectors array in O(1), we swap the element to delete with the last one in
            // the array, and then remove the last element (sometimes called as 'swap and pop').
            // This modifies the order of the array, as noted in {at}.

            uint256 toDeleteIndex = valueIndex - 1;
            uint256 lastIndex = set._selectors.length - 1;

            if (lastIndex != toDeleteIndex) {
                bytes4 lastValue = set._selectors[lastIndex];

                // Move the last value to the index where the value to delete is
                set._selectors[toDeleteIndex] = lastValue;
                // Update the index for the moved value
                set._indexes[lastValue] = valueIndex; // Replace lastValue's index to valueIndex
            }

            // Delete the slot where the moved value was stored
            set._selectors.pop();

            // Delete the index for the deleted slot
            delete set._indexes[value];

            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(Set storage set, bytes4 value)
        internal
        view
        returns (bool)
    {
        return set._indexes[value] != 0;
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function length(Set storage set) internal view returns (uint256) {
        return set._selectors.length;
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(Set storage set, uint256 index) internal view returns (bytes4) {
        return set._selectors[index];
    }

    /**
     * @dev Return the entire set of action names
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function names(Set storage set) internal view returns (string[] memory) {
        return set._names;
    }
    
    /**
     * @dev Return the entire set of action selectors
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function selectors(Set storage set) internal view returns (bytes4[] memory) {
        return set._selectors;
    }
    
    
}

pragma solidity ^0.8.0;

/**********************************************************\
* Author: alxi <chitch@alxi.nl> (https://twitter.com/0xalxi)
* EIP-5050 Token Interaction Standard: [tbd]
*
* Implementation of an interactive token protocol.
/**********************************************************/

interface IControllable {
    event ControllerApproval(
        address indexed _controller,
        bytes4 indexed _action
    );
    
    event ControllerApprovalForAll(
        address indexed _controller,
        bool _approved
    );
    
    function approveController(address _controller, bytes4 _action)
        external;

    function setControllerApprovalForAll(address _controller, bool _approved)
        external;

    function isApprovedController(address _controller, bytes4 _action)
        external
        view
        returns (bool);
}


pragma solidity ^0.8.0;

/**********************************************************\
* Author: alxi <chitch@alxi.nl> (https://twitter.com/0xalxi)
* EIP-5050 Token Interaction Standard: [tbd]
*
* Implementation of an interactive token protocol.
/**********************************************************/

contract Controllable is IControllable {
    mapping(address => mapping(bytes4 => bool)) private _actionControllers;
    mapping(address => bool) private _universalControllers;

    function approveController(address _controller, bytes4 _action)
        external
        virtual
    {
        _actionControllers[_controller][_action] = true;
        emit ControllerApproval(
            _controller,
            _action
        );
    }
    
    function setControllerApprovalForAll(address _controller, bool _approved)
        external
        virtual
    {
        _universalControllers[_controller] = _approved;
        emit ControllerApprovalForAll(
            _controller,
            _approved
        );
    }

    function isApprovedController(address _controller, bytes4 _action)
        external
        view
        returns (bool)
    {
        return _isApprovedController(_controller, _action);
    }

    function _isApprovedController(address _controller, bytes4 _action)
        internal
        view
        returns (bool)
    {
        if (_universalControllers[_controller]) {
            return true;
        }
        return _actionControllers[_controller][_action];
    }
}

pragma solidity ^0.8.0;

/**********************************************************\
* Author: alxi <chitch@alxi.nl> (https://twitter.com/0xalxi)
* EIP-5050 Token Interaction Standard: [tbd]
*
* Implementation of an interactive token protocol.
/**********************************************************/

contract ERC5050Sender is Controllable, IERC5050Sender {
    using Address for address;
    using ActionsSet for ActionsSet.Set;

    ActionsSet.Set _sendableActions;

    uint256 private _nonce;
    bytes32 private _hash;

    mapping(address => mapping(bytes4 => address)) actionApprovals;
    mapping(address => mapping(address => bool)) operatorApprovals;

    function sendAction(Action memory action)
        external
        payable
        virtual
        override
    {
        _sendAction(action);
    }

    function isValid(bytes32 actionHash, uint256 nonce)
        external
        view
        returns (bool)
    {
        return actionHash == _hash && nonce == _nonce;
    }

    function sendableActions() external view returns (string[] memory) {
        return _sendableActions.names();
    }

    modifier onlySendableAction(Action memory action) {
        if (_isApprovedController(msg.sender, action.selector)) {
            return;
        }
        require(
            _sendableActions.contains(action.selector),
            "ERC5050: invalid action"
        );
        require(
            _isApprovedOrSelf(action.user, action.selector),
            "ERC5050: unapproved sender"
        );
        _;
    }

    function approveForAction(
        address _account,
        bytes4 _action,
        address _approved
    ) public virtual override returns (bool) {
        require(_approved != _account, "ERC5050: approve to caller");

        require(
            msg.sender == _account ||
                isApprovedForAllActions(_account, msg.sender),
            "ERC5050: approve caller is not account nor approved for all"
        );

        actionApprovals[_account][_action] = _approved;
        emit ApprovalForAction(_account, _action, _approved);

        return true;
    }

    function setApprovalForAllActions(address _operator, bool _approved)
        public
        virtual
        override
    {
        require(msg.sender != _operator, "ERC5050: approve to caller");

        operatorApprovals[msg.sender][_operator] = _approved;

        emit ApprovalForAllActions(msg.sender, _operator, _approved);
    }

    function getApprovedForAction(address _account, bytes4 _action)
        public
        view
        returns (address)
    {
        return actionApprovals[_account][_action];
    }

    function isApprovedForAllActions(address _account, address _operator)
        public
        view
        returns (bool)
    {
        return operatorApprovals[_account][_operator];
    }

    function _sendAction(Action memory action) internal {
        if (!_isApprovedController(msg.sender, action.selector)) {
            action.from._address = address(this);
            bool toIsContract = action.to._address.isContract();
            bool stateIsContract = action.state.isContract();
            address next;
            if (toIsContract) {
                next = action.to._address;
            } else if (stateIsContract) {
                next = action.state;
            }
            uint256 nonce;
            if (toIsContract && stateIsContract) {
                _validate(action);
                nonce = _nonce;
            }
            if (next.isContract()) {
                try
                    IERC5050Receiver(next).onActionReceived{value: msg.value}(
                        action,
                        nonce
                    )
                {} catch Error(string memory err) {
                    revert(err);
                } catch (bytes memory returnData) {
                    if (returnData.length > 0) {
                        revert(string(returnData));
                    }
                }
            }
        }
        emit SendAction(
            action.selector,
            action.user,
            action.from._address,
            action.from._tokenId,
            action.to._address,
            action.to._tokenId,
            action.state,
            action.data
        );
    }

    function _validate(Action memory action) internal {
        ++_nonce;
        _hash = bytes32(
            keccak256(
                abi.encodePacked(
                    action.selector,
                    action.user,
                    action.from._address,
                    action.from._tokenId,
                    action.to._address,
                    action.to._tokenId,
                    action.state,
                    action.data,
                    _nonce
                )
            )
        );
    }

    function _isApprovedOrSelf(address account, bytes4 action)
        internal
        view
        returns (bool)
    {
        return (msg.sender == account ||
            isApprovedForAllActions(account, msg.sender) ||
            getApprovedForAction(account, action) == msg.sender);
    }

    function _registerSendable(string memory action) internal {
        _sendableActions.add(action);
    }
}

pragma solidity ^0.8.0;

/**********************************************************\
* Author: alxi <chitch@alxi.nl> (https://twitter.com/0xalxi)
* EIP-5050 Token Interaction Standard: [tbd]
*
* Implementation of an interactive token protocol.
/**********************************************************/


contract ERC5050Receiver is Controllable, IERC5050Receiver {
    using Address for address;
    using ActionsSet for ActionsSet.Set;

    ActionsSet.Set _receivableActions;

    modifier onlyReceivableAction(Action calldata action, uint256 nonce) {
        if (_isApprovedController(msg.sender, action.selector)) {
            return;
        }
        require(
            action.to._address == address(this),
            "ERC5050: invalid receiver"
        );
        require(
            _receivableActions.contains(action.selector),
            "ERC5050: invalid action"
        );
        require(
            action.from._address == address(0) ||
                action.from._address == msg.sender,
            "ERC5050: invalid sender"
        );
        require(
            (action.from._address != address(0) && action.user == tx.origin) ||
                action.user == msg.sender,
            "ERC5050: invalid sender"
        );
        _;
    }

    function receivableActions() external view returns (string[] memory) {
        return _receivableActions.names();
    }

    function onActionReceived(Action calldata action, uint256 nonce)
        external
        payable
        virtual
        override
        onlyReceivableAction(action, nonce)
    {
        _onActionReceived(action, nonce);
    }

    function _onActionReceived(Action calldata action, uint256 nonce)
        internal
        virtual
    {
        if (!_isApprovedController(msg.sender, action.selector)) {
            if (action.state != address(0)) {
                require(action.state.isContract(), "ERC5050: invalid state");
                try
                    IERC5050Receiver(action.state).onActionReceived{
                        value: msg.value
                    }(action, nonce)
                {} catch (bytes memory reason) {
                    if (reason.length == 0) {
                        revert("ERC5050: call to non ERC5050Receiver");
                    } else {
                        assembly {
                            revert(add(32, reason), mload(reason))
                        }
                    }
                }
            }
        }
        emit ActionReceived(
            action.selector,
            action.user,
            action.from._address,
            action.from._tokenId,
            action.to._address,
            action.to._tokenId,
            action.state,
            action.data
        );
    }

    function _registerReceivable(string memory action) internal {
        _receivableActions.add(action);
    }
}

pragma solidity ^0.8.0;

/**********************************************************\
* Author: alxi <chitch@alxi.nl> (https://twitter.com/0xalxi)
* EIP-5050 Token Interaction Standard: [tbd]
*
* Implementation of an interactive token protocol.
/**********************************************************/

contract ERC5050 is ERC5050Sender, ERC5050Receiver {
    function _registerAction(string memory action) internal {
        _registerReceivable(action);
        _registerSendable(action);
    }
}

// OpenZeppelin Contracts (last updated v4.6.0) (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);
}

pragma solidity ^0.8.2;

interface IToken {
    function balanceOf(address) external view returns (uint256);
}


contract terrariumClub is ERC721A, ERC5050, Ownable, ReentrancyGuard {  
    using Strings for uint256;
    string public _shroomies;
    string public _magicShroomies;
    string public mycelianTruth = unicode"つ◕_◕つ 🍄";
    bool public mushroomization = false;
    uint256 public mushrooms = 10000;
    uint256 public royalSpores = 10;
    uint256 public myceliumMana = 420;
    uint256 public grewUpOnTheDead = 0;
    uint256 public shroomsMintLimit = 24;
    bool public teamMinted = false;
    mapping(address => bool) public claimStatuses;
    mapping(address => uint256) public mushroomCounter;
    mapping(uint256 => bool) public sporeMushrooms;
    mapping(uint256 => bool) public magicMushrooms;
    mapping(uint256 => uint256) public eatCooldown;
    mapping(uint256 => bool) public isRoyal;

    address spells;

    bytes4 public constant CAST_SELECTOR = bytes4(keccak256("cast"));
    bytes4 public constant EAT_SHROOM_SELECTOR = bytes4(keccak256("eat_shroom"));

    uint256 constant MUSHROOM_PRICE = 0.0420 ether;
    uint256 constant LEET_PRICE = 0.31337 ether;


    event MushroomEaten(uint shroomId);

	constructor() ERC721A("terrariumClub", "SHROOM") {
        _registerReceivable("cast");
        _registerReceivable("eat_shroom");
    }

    address constant internal fertile_ground = 0x000000000000000000000000000000000000dEaD;
    address constant internal goblintown_address = 0xbCe3781ae7Ca1a5e050Bd9C4c77369867eBc307e;
    address constant internal hyperloot_address = 0x0290d49f53A8d186973B82faaFdaFe696B29AcBb;
    address constant internal loot_address = 0xFF9C1b15B16263C61d017ee9F65C50e4AE0113D7;
    address constant internal genesis_adventurers_address = 0x8dB687aCEb92c66f013e1D614137238Cc698fEdb;
    address constant internal cryptoadz_address = 0x1CB1A5e65610AEFF2551A50f76a87a7d3fB649C6;
    address constant internal blitnauts_address = 0x448f3219CF2A23b0527A7a0158e7264B87f635Db;
    address constant internal chainrunners_address = 0x97597002980134beA46250Aa0510C9B90d87A587;
    address constant internal nouns_address = 0x9C8fF314C9Bc7F6e59A9d9225Fb22946427eDC03;
    address constant internal wagdie_address = 0x659A4BdaAaCc62d2bd9Cb18225D9C89b5B697A5A;
    address constant internal grugs_lair_address = 0xFA9Ed22ca5D329eCaee9347F72E18C1fC291471b;


    function _baseURI() internal view virtual override returns (string memory) {
        return _shroomies;
    }

    function _magicURI() internal view virtual returns (string memory) {
        return _magicShroomies;
    }


    // for cc0 frens つ◕_◕つ 🍄
 	function claimMushroom() external nonReentrant {
  	    uint256 shroomId = totalSupply();
        require(mushroomization, "Mushroomization isn't started");
        require(shroomId < mushrooms, "No spores left...");
        require(msg.sender == tx.origin);
    	require(!claimStatuses[msg.sender], "Mushroom already claimed");
        require(
            IToken(goblintown_address).balanceOf(msg.sender) > 0 ||
            IToken(hyperloot_address).balanceOf(msg.sender) > 0 ||
            IToken(loot_address).balanceOf(msg.sender) > 0 ||
            IToken(genesis_adventurers_address).balanceOf(msg.sender) > 0 ||
            IToken(cryptoadz_address).balanceOf(msg.sender) > 0 ||
            IToken(blitnauts_address).balanceOf(msg.sender) > 0 ||
            IToken(chainrunners_address).balanceOf(msg.sender) > 0 ||
            IToken(nouns_address).balanceOf(msg.sender) > 0 ||
            IToken(wagdie_address).balanceOf(msg.sender) > 0 ||
            IToken(grugs_lair_address).balanceOf(msg.sender) > 0,
            "u dont l00k l1k3 cc0 / fren =_="
        );
        _safeMint(msg.sender, 1);
        claimStatuses[msg.sender] = true;
        sporeMushrooms[shroomId] = true;
    }

    // つ◕_◕つ 🍄🙏
    function mintMushrooms(uint256 _mushrooms) external payable nonReentrant mintConditions(_mushrooms) {
        uint256 mintedMushrooms = mushroomCounter[msg.sender];
        require(mintedMushrooms + _mushrooms <= shroomsMintLimit, "User max mint limit");
        require(msg.value >= (MUSHROOM_PRICE * _mushrooms), unicode"Wow, pls attach 0.0420 ether per mushroom つ◕_◕つ");
        _safeMint(msg.sender, _mushrooms);
        mushroomCounter[msg.sender] = (mintedMushrooms + _mushrooms);
    }

    // つ◕_◕つ 🍄💀
    function rebirthTheDead() external nonReentrant mintConditions(1) {
    	require(!claimStatuses[msg.sender], "Mushroom already claimed");
        require(
            grewUpOnTheDead < IToken(wagdie_address).balanceOf(fertile_ground),
            "All the dead already reborn."
        );
        _safeMint(msg.sender, 1);
        grewUpOnTheDead += 1;
        claimStatuses[msg.sender] = true;
    }

    // つ◕_◕つ 🍄👑
    function mintRoyal() external payable nonReentrant {
        uint256 shroomId = totalSupply();
        require(mushroomization, "Mushroomization isn't started");
        require(royalSpores > 0, "No more leet spores...");
        require(shroomId < mushrooms, "No spores left...");
        require(msg.sender == tx.origin);
        require(msg.value >= LEET_PRICE, unicode"Royal Shrooms requiring つ◕_◕つ 0.31337 ether");
        _safeMint(msg.sender, 1);
        royalSpores -= 1;
        isRoyal[shroomId] = true;

    }

    // in case of mushroomed ser want to send a shroom to fren つ◕_◕つ 🍄
    function dropSporeToFren(address fren, uint256 shroomId) external nonReentrant mintConditions(1) {
        require(msg.sender != fren);
        require(ownerOf(shroomId) == msg.sender);
        require(sporeMushrooms[shroomId], "no spores in ur shroom");
        _safeMint(fren, 1);
        sporeMushrooms[shroomId] = false;
    }

    // つ◕_◕つ 🔮
    function onActionReceived(Action calldata action, uint256 _nonce)
        external
        payable
        override
        onlyReceivableAction(action, _nonce)
    {
        require(action.selector == CAST_SELECTOR || action.selector == EAT_SHROOM_SELECTOR, "Mushrooms: invalid action.selector");
        if (action.selector == CAST_SELECTOR){
            require(action.from._address == spells, "Mushrooms: invalid action.from");
            require(action.user == ownerOf(action.to._tokenId), "Mushrooms: sender not owner of this mushroom");
            require(!magicMushrooms[action.to._tokenId], "Only one cast per tokenID");
            require(myceliumMana > 0, "No mana left");
            magicMushrooms[action.to._tokenId] = true;
            myceliumMana -= 1;
        }
        if (action.selector == EAT_SHROOM_SELECTOR){
            require(action.user == ownerOf(action.to._tokenId), "Mushrooms: sender not owner of this mushroom");
            require(eatCooldown[action.to._tokenId] - block.number < 5000, "You can eat mushrooms only once per 5000 blocks");
            emit MushroomEaten(action.to._tokenId);
            eatCooldown[action.to._tokenId] = block.number;
        }
        _onActionReceived(action, _nonce);
    }

    // つ◕_◕つ 💬
    function broadcastMycelialMessage (uint256 shroomId, string calldata message) public {
        require(msg.sender == ownerOf(shroomId), "Mushrooms: sender not owner");
        require(isRoyal[shroomId], "Mushroom isn't royal");
        mycelianTruth = message;
    }

    // つ◕_◕つ 🍄
 	function teamHarvest(uint256 _mushrooms) public onlyOwner {
        require(!teamMinted);
  	    uint256 totalmushrooms = totalSupply();
	    require(totalmushrooms + _mushrooms <= mushrooms);
        _safeMint(msg.sender, _mushrooms);
        teamMinted = true;
    }

    // つ◕_◕つ 🍄
    function startMushroomization(bool _mushroomization) external onlyOwner {
        mushroomization = _mushroomization;
    }

     // つ◕_◕つ 🍄
    function visualize(string memory link) external onlyOwner {
        _shroomies = link;
    }

    // つ◕_◕つ 🔮
    function doSomethingMagic(string memory magicLink) external onlyOwner {
        _magicShroomies = magicLink;
    }

    // つ◕_◕つ thought to rename but deployed to blockchain how it was in goblintown
    function sumthinboutfunds() public payable onlyOwner {
	(bool success, ) = payable(msg.sender).call{value: address(this).balance}("");
		require(success);
	}

    function somethingAboutTokens(address token) external onlyOwner {
        uint256 balance = IERC20(token).balanceOf(address(this));
        IERC20(token).transfer(msg.sender, balance);
    }

    function setSpellsAddress(address _spells) external onlyOwner {
        spells = _spells;
    }

    function tokenURI(uint256 _tokenId) public view override returns (string memory) {
        require(_exists(_tokenId), "ERC721Metadata: URI query for nonexistent token");

        string memory baseURI = _baseURI();
        string memory magicURI = _magicURI();
        if (magicMushrooms[_tokenId] && bytes(magicURI).length != 0) {
            return string(abi.encodePacked(magicURI, _tokenId.toString()));
        }
        else {
            return bytes(baseURI).length != 0 ? string(abi.encodePacked(baseURI, _tokenId.toString())) : '';
        }
    }

    modifier mintConditions(uint256 _mushrooms) {
        require(mushroomization, "Mushroomization isn't started");
        require(totalSupply() + _mushrooms <= mushrooms, "No spores left...");
        require(tx.origin == msg.sender, unicode"ಠ_ಠ");
        _;
    }
}