// 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);
        }
    }
}

// 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;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.9.0;

// ----------------------------------------------------------------------------
// BokkyPooBah's DateTime Library v1.01
//
// A gas-efficient Solidity date and time library
//
// https://github.com/bokkypoobah/BokkyPooBahsDateTimeLibrary
//
// Tested date range 1970/01/01 to 2345/12/31
//
// Conventions:
// Unit      | Range         | Notes
// :-------- |:-------------:|:-----
// timestamp | >= 0          | Unix timestamp, number of seconds since 1970/01/01 00:00:00 UTC
// year      | 1970 ... 2345 |
// month     | 1 ... 12      |
// day       | 1 ... 31      |
// hour      | 0 ... 23      |
// minute    | 0 ... 59      |
// second    | 0 ... 59      |
// dayOfWeek | 1 ... 7       | 1 = Monday, ..., 7 = Sunday
//
//
// Enjoy. (c) BokkyPooBah / Bok Consulting Pty Ltd 2018-2019. The MIT Licence.
// ----------------------------------------------------------------------------

library BokkyPooBahsDateTimeLibrary {

    uint constant SECONDS_PER_DAY = 24 * 60 * 60;
    uint constant SECONDS_PER_HOUR = 60 * 60;
    uint constant SECONDS_PER_MINUTE = 60;
    int constant OFFSET19700101 = 2440588;

    uint constant DOW_MON = 1;
    uint constant DOW_TUE = 2;
    uint constant DOW_WED = 3;
    uint constant DOW_THU = 4;
    uint constant DOW_FRI = 5;
    uint constant DOW_SAT = 6;
    uint constant DOW_SUN = 7;

    // ------------------------------------------------------------------------
    // Calculate the number of days from 1970/01/01 to year/month/day using
    // the date conversion algorithm from
    //   https://aa.usno.navy.mil/faq/JD_formula.html
    // and subtracting the offset 2440588 so that 1970/01/01 is day 0
    //
    // days = day
    //      - 32075
    //      + 1461 * (year + 4800 + (month - 14) / 12) / 4
    //      + 367 * (month - 2 - (month - 14) / 12 * 12) / 12
    //      - 3 * ((year + 4900 + (month - 14) / 12) / 100) / 4
    //      - offset
    // ------------------------------------------------------------------------
    function _daysFromDate(uint year, uint month, uint day) internal pure returns (uint _days) {
        require(year >= 1970);
        int _year = int(year);
        int _month = int(month);
        int _day = int(day);

        int __days = _day
          - 32075
          + 1461 * (_year + 4800 + (_month - 14) / 12) / 4
          + 367 * (_month - 2 - (_month - 14) / 12 * 12) / 12
          - 3 * ((_year + 4900 + (_month - 14) / 12) / 100) / 4
          - OFFSET19700101;

        _days = uint(__days);
    }

    // ------------------------------------------------------------------------
    // Calculate year/month/day from the number of days since 1970/01/01 using
    // the date conversion algorithm from
    //   http://aa.usno.navy.mil/faq/docs/JD_Formula.php
    // and adding the offset 2440588 so that 1970/01/01 is day 0
    //
    // int L = days + 68569 + offset
    // int N = 4 * L / 146097
    // L = L - (146097 * N + 3) / 4
    // year = 4000 * (L + 1) / 1461001
    // L = L - 1461 * year / 4 + 31
    // month = 80 * L / 2447
    // dd = L - 2447 * month / 80
    // L = month / 11
    // month = month + 2 - 12 * L
    // year = 100 * (N - 49) + year + L
    // ------------------------------------------------------------------------
    function _daysToDate(uint _days) internal pure returns (uint year, uint month, uint day) {
        int __days = int(_days);

        int L = __days + 68569 + OFFSET19700101;
        int N = 4 * L / 146097;
        L = L - (146097 * N + 3) / 4;
        int _year = 4000 * (L + 1) / 1461001;
        L = L - 1461 * _year / 4 + 31;
        int _month = 80 * L / 2447;
        int _day = L - 2447 * _month / 80;
        L = _month / 11;
        _month = _month + 2 - 12 * L;
        _year = 100 * (N - 49) + _year + L;

        year = uint(_year);
        month = uint(_month);
        day = uint(_day);
    }

    function timestampFromDate(uint year, uint month, uint day) internal pure returns (uint timestamp) {
        timestamp = _daysFromDate(year, month, day) * SECONDS_PER_DAY;
    }
    function timestampFromDateTime(uint year, uint month, uint day, uint hour, uint minute, uint second) internal pure returns (uint timestamp) {
        timestamp = _daysFromDate(year, month, day) * SECONDS_PER_DAY + hour * SECONDS_PER_HOUR + minute * SECONDS_PER_MINUTE + second;
    }
    function timestampToDate(uint timestamp) internal pure returns (uint year, uint month, uint day) {
        (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY);
    }
    function timestampToDateTime(uint timestamp) internal pure returns (uint year, uint month, uint day, uint hour, uint minute, uint second) {
        (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY);
        uint secs = timestamp % SECONDS_PER_DAY;
        hour = secs / SECONDS_PER_HOUR;
        secs = secs % SECONDS_PER_HOUR;
        minute = secs / SECONDS_PER_MINUTE;
        second = secs % SECONDS_PER_MINUTE;
    }

    function isValidDate(uint year, uint month, uint day) internal pure returns (bool valid) {
        if (year >= 1970 && month > 0 && month <= 12) {
            uint daysInMonth = _getDaysInMonth(year, month);
            if (day > 0 && day <= daysInMonth) {
                valid = true;
            }
        }
    }
    function isValidDateTime(uint year, uint month, uint day, uint hour, uint minute, uint second) internal pure returns (bool valid) {
        if (isValidDate(year, month, day)) {
            if (hour < 24 && minute < 60 && second < 60) {
                valid = true;
            }
        }
    }
    function isLeapYear(uint timestamp) internal pure returns (bool leapYear) {
        (uint year,,) = _daysToDate(timestamp / SECONDS_PER_DAY);
        leapYear = _isLeapYear(year);
    }
    function _isLeapYear(uint year) internal pure returns (bool leapYear) {
        leapYear = ((year % 4 == 0) && (year % 100 != 0)) || (year % 400 == 0);
    }
    function isWeekDay(uint timestamp) internal pure returns (bool weekDay) {
        weekDay = getDayOfWeek(timestamp) <= DOW_FRI;
    }
    function isWeekEnd(uint timestamp) internal pure returns (bool weekEnd) {
        weekEnd = getDayOfWeek(timestamp) >= DOW_SAT;
    }
    function getDaysInMonth(uint timestamp) internal pure returns (uint daysInMonth) {
        (uint year, uint month,) = _daysToDate(timestamp / SECONDS_PER_DAY);
        daysInMonth = _getDaysInMonth(year, month);
    }
    function _getDaysInMonth(uint year, uint month) internal pure returns (uint daysInMonth) {
        if (month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10 || month == 12) {
            daysInMonth = 31;
        } else if (month != 2) {
            daysInMonth = 30;
        } else {
            daysInMonth = _isLeapYear(year) ? 29 : 28;
        }
    }
    // 1 = Monday, 7 = Sunday
    function getDayOfWeek(uint timestamp) internal pure returns (uint dayOfWeek) {
        uint _days = timestamp / SECONDS_PER_DAY;
        dayOfWeek = (_days + 3) % 7 + 1;
    }

    function getYear(uint timestamp) internal pure returns (uint year) {
        (year,,) = _daysToDate(timestamp / SECONDS_PER_DAY);
    }
    function getMonth(uint timestamp) internal pure returns (uint month) {
        (,month,) = _daysToDate(timestamp / SECONDS_PER_DAY);
    }
    function getDay(uint timestamp) internal pure returns (uint day) {
        (,,day) = _daysToDate(timestamp / SECONDS_PER_DAY);
    }
    function getHour(uint timestamp) internal pure returns (uint hour) {
        uint secs = timestamp % SECONDS_PER_DAY;
        hour = secs / SECONDS_PER_HOUR;
    }
    function getMinute(uint timestamp) internal pure returns (uint minute) {
        uint secs = timestamp % SECONDS_PER_HOUR;
        minute = secs / SECONDS_PER_MINUTE;
    }
    function getSecond(uint timestamp) internal pure returns (uint second) {
        second = timestamp % SECONDS_PER_MINUTE;
    }

    function addYears(uint timestamp, uint _years) internal pure returns (uint newTimestamp) {
        (uint year, uint month, uint day) = _daysToDate(timestamp / SECONDS_PER_DAY);
        year += _years;
        uint daysInMonth = _getDaysInMonth(year, month);
        if (day > daysInMonth) {
            day = daysInMonth;
        }
        newTimestamp = _daysFromDate(year, month, day) * SECONDS_PER_DAY + timestamp % SECONDS_PER_DAY;
        require(newTimestamp >= timestamp);
    }
    function addMonths(uint timestamp, uint _months) internal pure returns (uint newTimestamp) {
        (uint year, uint month, uint day) = _daysToDate(timestamp / SECONDS_PER_DAY);
        month += _months;
        year += (month - 1) / 12;
        month = (month - 1) % 12 + 1;
        uint daysInMonth = _getDaysInMonth(year, month);
        if (day > daysInMonth) {
            day = daysInMonth;
        }
        newTimestamp = _daysFromDate(year, month, day) * SECONDS_PER_DAY + timestamp % SECONDS_PER_DAY;
        require(newTimestamp >= timestamp);
    }
    function addDays(uint timestamp, uint _days) internal pure returns (uint newTimestamp) {
        newTimestamp = timestamp + _days * SECONDS_PER_DAY;
        require(newTimestamp >= timestamp);
    }
    function addHours(uint timestamp, uint _hours) internal pure returns (uint newTimestamp) {
        newTimestamp = timestamp + _hours * SECONDS_PER_HOUR;
        require(newTimestamp >= timestamp);
    }
    function addMinutes(uint timestamp, uint _minutes) internal pure returns (uint newTimestamp) {
        newTimestamp = timestamp + _minutes * SECONDS_PER_MINUTE;
        require(newTimestamp >= timestamp);
    }
    function addSeconds(uint timestamp, uint _seconds) internal pure returns (uint newTimestamp) {
        newTimestamp = timestamp + _seconds;
        require(newTimestamp >= timestamp);
    }

    function subYears(uint timestamp, uint _years) internal pure returns (uint newTimestamp) {
        (uint year, uint month, uint day) = _daysToDate(timestamp / SECONDS_PER_DAY);
        year -= _years;
        uint daysInMonth = _getDaysInMonth(year, month);
        if (day > daysInMonth) {
            day = daysInMonth;
        }
        newTimestamp = _daysFromDate(year, month, day) * SECONDS_PER_DAY + timestamp % SECONDS_PER_DAY;
        require(newTimestamp <= timestamp);
    }
    function subMonths(uint timestamp, uint _months) internal pure returns (uint newTimestamp) {
        (uint year, uint month, uint day) = _daysToDate(timestamp / SECONDS_PER_DAY);
        uint yearMonth = year * 12 + (month - 1) - _months;
        year = yearMonth / 12;
        month = yearMonth % 12 + 1;
        uint daysInMonth = _getDaysInMonth(year, month);
        if (day > daysInMonth) {
            day = daysInMonth;
        }
        newTimestamp = _daysFromDate(year, month, day) * SECONDS_PER_DAY + timestamp % SECONDS_PER_DAY;
        require(newTimestamp <= timestamp);
    }
    function subDays(uint timestamp, uint _days) internal pure returns (uint newTimestamp) {
        newTimestamp = timestamp - _days * SECONDS_PER_DAY;
        require(newTimestamp <= timestamp);
    }
    function subHours(uint timestamp, uint _hours) internal pure returns (uint newTimestamp) {
        newTimestamp = timestamp - _hours * SECONDS_PER_HOUR;
        require(newTimestamp <= timestamp);
    }
    function subMinutes(uint timestamp, uint _minutes) internal pure returns (uint newTimestamp) {
        newTimestamp = timestamp - _minutes * SECONDS_PER_MINUTE;
        require(newTimestamp <= timestamp);
    }
    function subSeconds(uint timestamp, uint _seconds) internal pure returns (uint newTimestamp) {
        newTimestamp = timestamp - _seconds;
        require(newTimestamp <= timestamp);
    }

    function diffYears(uint fromTimestamp, uint toTimestamp) internal pure returns (uint _years) {
        require(fromTimestamp <= toTimestamp);
        (uint fromYear,,) = _daysToDate(fromTimestamp / SECONDS_PER_DAY);
        (uint toYear,,) = _daysToDate(toTimestamp / SECONDS_PER_DAY);
        _years = toYear - fromYear;
    }
    function diffMonths(uint fromTimestamp, uint toTimestamp) internal pure returns (uint _months) {
        require(fromTimestamp <= toTimestamp);
        (uint fromYear, uint fromMonth,) = _daysToDate(fromTimestamp / SECONDS_PER_DAY);
        (uint toYear, uint toMonth,) = _daysToDate(toTimestamp / SECONDS_PER_DAY);
        _months = toYear * 12 + toMonth - fromYear * 12 - fromMonth;
    }
    function diffDays(uint fromTimestamp, uint toTimestamp) internal pure returns (uint _days) {
        require(fromTimestamp <= toTimestamp);
        _days = (toTimestamp - fromTimestamp) / SECONDS_PER_DAY;
    }
    function diffHours(uint fromTimestamp, uint toTimestamp) internal pure returns (uint _hours) {
        require(fromTimestamp <= toTimestamp);
        _hours = (toTimestamp - fromTimestamp) / SECONDS_PER_HOUR;
    }
    function diffMinutes(uint fromTimestamp, uint toTimestamp) internal pure returns (uint _minutes) {
        require(fromTimestamp <= toTimestamp);
        _minutes = (toTimestamp - fromTimestamp) / SECONDS_PER_MINUTE;
    }
    function diffSeconds(uint fromTimestamp, uint toTimestamp) internal pure returns (uint _seconds) {
        require(fromTimestamp <= toTimestamp);
        _seconds = toTimestamp - fromTimestamp;
    }
}

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

pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity >= 0.8.11;

/**
 * @title Super app definitions library
 * @author Superfluid
 */
library SuperAppDefinitions {

    /**************************************************************************
    / App manifest config word
    /**************************************************************************/

    /*
     * App level is a way to allow the app to whitelist what other app it can
     * interact with (aka. composite app feature).
     *
     * For more details, refer to the technical paper of superfluid protocol.
     */
    uint256 constant internal APP_LEVEL_MASK = 0xFF;

    // The app is at the final level, hence it doesn't want to interact with any other app
    uint256 constant internal APP_LEVEL_FINAL = 1 << 0;

    // The app is at the second level, it may interact with other final level apps if whitelisted
    uint256 constant internal APP_LEVEL_SECOND = 1 << 1;

    function getAppCallbackLevel(uint256 configWord) internal pure returns (uint8) {
        return uint8(configWord & APP_LEVEL_MASK);
    }

    uint256 constant internal APP_JAIL_BIT = 1 << 15;
    function isAppJailed(uint256 configWord) internal pure returns (bool) {
        return (configWord & SuperAppDefinitions.APP_JAIL_BIT) > 0;
    }

    /**************************************************************************
    / Callback implementation bit masks
    /**************************************************************************/
    uint256 constant internal AGREEMENT_CALLBACK_NOOP_BITMASKS = 0xFF << 32;
    uint256 constant internal BEFORE_AGREEMENT_CREATED_NOOP = 1 << (32 + 0);
    uint256 constant internal AFTER_AGREEMENT_CREATED_NOOP = 1 << (32 + 1);
    uint256 constant internal BEFORE_AGREEMENT_UPDATED_NOOP = 1 << (32 + 2);
    uint256 constant internal AFTER_AGREEMENT_UPDATED_NOOP = 1 << (32 + 3);
    uint256 constant internal BEFORE_AGREEMENT_TERMINATED_NOOP = 1 << (32 + 4);
    uint256 constant internal AFTER_AGREEMENT_TERMINATED_NOOP = 1 << (32 + 5);

    /**************************************************************************
    / App Jail Reasons
    /**************************************************************************/
    uint256 constant internal APP_RULE_NO_REVERT_ON_TERMINATION_CALLBACK = 10;
    uint256 constant internal APP_RULE_NO_CRITICAL_SENDER_ACCOUNT = 11;
    uint256 constant internal APP_RULE_NO_CRITICAL_RECEIVER_ACCOUNT = 12;
    uint256 constant internal APP_RULE_CTX_IS_READONLY = 20;
    uint256 constant internal APP_RULE_CTX_IS_NOT_CLEAN = 21;
    uint256 constant internal APP_RULE_CTX_IS_MALFORMATED = 22;
    uint256 constant internal APP_RULE_COMPOSITE_APP_IS_NOT_WHITELISTED = 30;
    uint256 constant internal APP_RULE_COMPOSITE_APP_IS_JAILED = 31;
    uint256 constant internal APP_RULE_MAX_APP_LEVEL_REACHED = 40;

    // Validate configWord cleaness for future compatibility, or else may introduce undefined future behavior
    function isConfigWordClean(uint256 configWord) internal pure returns (bool) {
        return (configWord & ~(APP_LEVEL_MASK | APP_JAIL_BIT | AGREEMENT_CALLBACK_NOOP_BITMASKS)) == uint256(0);
    }
}

/**
 * @title Context definitions library
 * @author Superfluid
 */
library ContextDefinitions {

    /**************************************************************************
    / Call info
    /**************************************************************************/

    // app level
    uint256 constant internal CALL_INFO_APP_LEVEL_MASK = 0xFF;

    // call type
    uint256 constant internal CALL_INFO_CALL_TYPE_SHIFT = 32;
    uint256 constant internal CALL_INFO_CALL_TYPE_MASK = 0xF << CALL_INFO_CALL_TYPE_SHIFT;
    uint8 constant internal CALL_INFO_CALL_TYPE_AGREEMENT = 1;
    uint8 constant internal CALL_INFO_CALL_TYPE_APP_ACTION = 2;
    uint8 constant internal CALL_INFO_CALL_TYPE_APP_CALLBACK = 3;

    function decodeCallInfo(uint256 callInfo)
        internal pure
        returns (uint8 appCallbackLevel, uint8 callType)
    {
        appCallbackLevel = uint8(callInfo & CALL_INFO_APP_LEVEL_MASK);
        callType = uint8((callInfo & CALL_INFO_CALL_TYPE_MASK) >> CALL_INFO_CALL_TYPE_SHIFT);
    }

    function encodeCallInfo(uint8 appCallbackLevel, uint8 callType)
        internal pure
        returns (uint256 callInfo)
    {
        return uint256(appCallbackLevel) | (uint256(callType) << CALL_INFO_CALL_TYPE_SHIFT);
    }

}

/**
 * @title Flow Operator definitions library
  * @author Superfluid
 */
library FlowOperatorDefinitions {
   uint8 constant internal AUTHORIZE_FLOW_OPERATOR_CREATE = uint8(1) << 0;
   uint8 constant internal AUTHORIZE_FLOW_OPERATOR_UPDATE = uint8(1) << 1;
   uint8 constant internal AUTHORIZE_FLOW_OPERATOR_DELETE = uint8(1) << 2;
   uint8 constant internal AUTHORIZE_FULL_CONTROL =
       AUTHORIZE_FLOW_OPERATOR_CREATE | AUTHORIZE_FLOW_OPERATOR_UPDATE | AUTHORIZE_FLOW_OPERATOR_DELETE;
   uint8 constant internal REVOKE_FLOW_OPERATOR_CREATE = ~(uint8(1) << 0);
   uint8 constant internal REVOKE_FLOW_OPERATOR_UPDATE = ~(uint8(1) << 1);
   uint8 constant internal REVOKE_FLOW_OPERATOR_DELETE = ~(uint8(1) << 2);

   function isPermissionsClean(uint8 permissions) internal pure returns (bool) {
       return (
           permissions & ~(AUTHORIZE_FLOW_OPERATOR_CREATE
               | AUTHORIZE_FLOW_OPERATOR_UPDATE
               | AUTHORIZE_FLOW_OPERATOR_DELETE)
           ) == uint8(0);
   }
}

/**
 * @title Batch operation library
 * @author Superfluid
 */
library BatchOperation {
    /**
     * @dev ERC20.approve batch operation type
     *
     * Call spec:
     * ISuperToken(target).operationApprove(
     *     abi.decode(data, (address spender, uint256 amount))
     * )
     */
    uint32 constant internal OPERATION_TYPE_ERC20_APPROVE = 1;
    /**
     * @dev ERC20.transferFrom batch operation type
     *
     * Call spec:
     * ISuperToken(target).operationTransferFrom(
     *     abi.decode(data, (address sender, address recipient, uint256 amount)
     * )
     */
    uint32 constant internal OPERATION_TYPE_ERC20_TRANSFER_FROM = 2;
    /**
     * @dev ERC777.send batch operation type
     *
     * Call spec:
     * ISuperToken(target).operationSend(
     *     abi.decode(data, (address recipient, uint256 amount, bytes userData)
     * )
     */
    uint32 constant internal OPERATION_TYPE_ERC777_SEND = 3;
    /**
     * @dev ERC20.increaseAllowance batch operation type
     *
     * Call spec:
     * ISuperToken(target).operationIncreaseAllowance(
     *     abi.decode(data, (address account, address spender, uint256 addedValue))
     * )
     */
    uint32 constant internal OPERATION_TYPE_ERC20_INCREASE_ALLOWANCE = 4;
    /**
     * @dev ERC20.decreaseAllowance batch operation type
     *
     * Call spec:
     * ISuperToken(target).operationDecreaseAllowance(
     *     abi.decode(data, (address account, address spender, uint256 subtractedValue))
     * )
     */
    uint32 constant internal OPERATION_TYPE_ERC20_DECREASE_ALLOWANCE = 5;
    /**
     * @dev SuperToken.upgrade batch operation type
     *
     * Call spec:
     * ISuperToken(target).operationUpgrade(
     *     abi.decode(data, (uint256 amount)
     * )
     */
    uint32 constant internal OPERATION_TYPE_SUPERTOKEN_UPGRADE = 1 + 100;
    /**
     * @dev SuperToken.downgrade batch operation type
     *
     * Call spec:
     * ISuperToken(target).operationDowngrade(
     *     abi.decode(data, (uint256 amount)
     * )
     */
    uint32 constant internal OPERATION_TYPE_SUPERTOKEN_DOWNGRADE = 2 + 100;
    /**
     * @dev Superfluid.callAgreement batch operation type
     *
     * Call spec:
     * callAgreement(
     *     ISuperAgreement(target)),
     *     abi.decode(data, (bytes callData, bytes userData)
     * )
     */
    uint32 constant internal OPERATION_TYPE_SUPERFLUID_CALL_AGREEMENT = 1 + 200;
    /**
     * @dev Superfluid.callAppAction batch operation type
     *
     * Call spec:
     * callAppAction(
     *     ISuperApp(target)),
     *     data
     * )
     */
    uint32 constant internal OPERATION_TYPE_SUPERFLUID_CALL_APP_ACTION = 2 + 200;
}

/**
 * @title Superfluid governance configs library
 * @author Superfluid
 */
library SuperfluidGovernanceConfigs {

    bytes32 constant internal SUPERFLUID_REWARD_ADDRESS_CONFIG_KEY =
        keccak256("org.superfluid-finance.superfluid.rewardAddress");
    bytes32 constant internal CFAV1_PPP_CONFIG_KEY =
        keccak256("org.superfluid-finance.agreements.ConstantFlowAgreement.v1.PPPConfiguration");
    bytes32 constant internal SUPERTOKEN_MINIMUM_DEPOSIT_KEY =
        keccak256("org.superfluid-finance.superfluid.superTokenMinimumDeposit");

    function getTrustedForwarderConfigKey(address forwarder) internal pure returns (bytes32) {
        return keccak256(abi.encode(
            "org.superfluid-finance.superfluid.trustedForwarder",
            forwarder));
    }

    function getAppRegistrationConfigKey(address deployer, string memory registrationKey) internal pure
        returns (bytes32)
    {
        return keccak256(abi.encode(
            "org.superfluid-finance.superfluid.appWhiteListing.registrationKey",
            deployer,
            registrationKey));
    }

    function getAppFactoryConfigKey(address factory) internal pure returns (bytes32)
    {
        return keccak256(abi.encode(
            "org.superfluid-finance.superfluid.appWhiteListing.factory",
            factory));
    }

    function decodePPPConfig(uint256 pppConfig) internal pure
        returns (uint256 liquidationPeriod, uint256 patricianPeriod)
    {
        liquidationPeriod = (pppConfig >> 32) & type(uint32).max;
        patricianPeriod = pppConfig & type(uint32).max;
    }
}

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

pragma solidity ^0.8.0;

import "./IERC165.sol";

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (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;
    }
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.19;

import {ERC721} from "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import {ReentrancyGuard} from "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import {SuperTokenV1Library} from "@superfluid-finance/ethereum-contracts/contracts/apps/SuperTokenV1Library.sol";
import {ISuperfluidPool, PoolConfig} from "@superfluid-finance/ethereum-contracts/contracts/interfaces/agreements/gdav1/IGeneralDistributionAgreementV1.sol";
import {ISETH} from "@superfluid-finance/ethereum-contracts/contracts/interfaces/tokens/ISETH.sol";
import {Base64} from "@openzeppelin/contracts/utils/Base64.sol";
import {Strings} from "@openzeppelin/contracts/utils/Strings.sol";
import {BokkyPooBahsDateTimeLibrary} from "./BokkyPooBahsDateTimeLibrary.sol";

/**
 * @title GdaNFTContract
 * @author Superfluid
 * The GdaNFTContract provides an easy to use ERC721 contract that mints NFTs for a given price.
 * In the same transaction, the contract will also upgrade the native token to super token and
 * distribute the flow to the pool. The flow will be distributed to pool members, who are no other than
 * the NFT minters.
 */
contract GdaNFTContract is ERC721, Ownable, ReentrancyGuard {
    using SuperTokenV1Library for ISETH;

    struct Mint {
        uint tokenId;
        uint timestamp;
    }

    ISuperfluidPool public pool;
    ISETH public nativeToken;
    uint96 public flowDuration;
    uint96 public tokenPrice;
    string public ipfsURI;
    uint public tokenToMint;
    uint public lastMintTimestamp;
    mapping(address => Mint) public userMint;
    mapping(address => bool) public hasMinted;
    mapping (uint=>address) public minter;

    event TokenMinted(address indexed to, uint tokenId);
    event BalanceRecovered(address indexed to, uint amount);
    event priceUpdated(uint96 newPrice);
    event ipfsURIUpdated(string newURI);

    /**
     * @dev Contructor of the GdaNFTContract
     * @param name Name of the NFT
     * @param symbol Symbol of the NFT
     * @param _nativeToken Address of the native super token
     * @param _tokenPrice Price of the NFT
     * @param _flowDuration Duration of the flow
     */
    constructor(
        string memory name,
        string memory symbol,
        ISETH _nativeToken,
        uint96 _tokenPrice,
        uint96 _flowDuration
    ) ERC721(name, symbol) {
        nativeToken = _nativeToken;
        tokenPrice = _tokenPrice;
        flowDuration = _flowDuration;
        pool = SuperTokenV1Library.createPool(
            nativeToken,
            address(this),
            PoolConfig({transferabilityForUnitsOwner: false, distributionFromAnyAddress: true})
        );
        lastMintTimestamp = block.timestamp;
    }

    /**
     * @dev Internal function that mints a NFT for the given address
     * @notice in the same transaction, the contract will also upgrade the native token to super token and
     * distribute the flow to the pool. The flow will be distributed to pool members, who are no other than
     * the NFT minters.
     * @param to Address of the NFT receiver
     * @param tokenId Id of the NFT
     */
    function _gdaMint(address to, uint tokenId) private {
        hasMinted[to] = true;
        userMint[to] = Mint(tokenId, block.timestamp);
        minter[tokenId]=to;
        lastMintTimestamp = block.timestamp;
        _mint(to, tokenId);
        uint amountToUpgrade = (tokenPrice / 100) * 95;
        nativeToken.upgradeByETH{value: amountToUpgrade}();
        int96 newFlowRate = int96(
            uint96(nativeToken.balanceOf(address(this))) / flowDuration
        );
        nativeToken.updateMemberUnits(pool, to, 1);
        nativeToken.distributeFlow(address(this), pool, newFlowRate);
    }

    /**
     * @dev Public function that mints a NFT for the given address
     */
    function gdaMint() external payable nonReentrant {
        require(!hasMinted[_msgSender()], "GdaNFTContract: account already minted");
        require(msg.value == tokenPrice, "GdaNFTContract: not enough eth sent");
        _gdaMint(_msgSender(), tokenToMint);
        tokenToMint++;
        emit TokenMinted(_msgSender(), tokenToMint);
    }

    /**
     * @dev Function to set the token price
     * @param _tokenPrice Price to set
     */
    function setTokenPrice(uint96 _tokenPrice) external onlyOwner {
        tokenPrice = _tokenPrice;
        emit priceUpdated(_tokenPrice);
    }

    /**
     * @dev Function to recover balance by the owner of the contract
     * @param to Address of send the balance
     * @param amount Amount to recover
     */
    function recoverBalance(address to, uint amount) external onlyOwner {
        payable(to).transfer(amount);
        emit BalanceRecovered(to, amount);
    }

    //**URI LOGIC *//

    function calcHash(uint _tokenId) public view returns (string memory) {
        return
            Strings.toString(
                uint32(
                    uint(keccak256(abi.encodePacked(_tokenId, minter[_tokenId])))
                )
            );
    }

    function setIPFSURI(string memory _ipfsuri) public onlyOwner {
        ipfsURI = _ipfsuri;
        emit ipfsURIUpdated(_ipfsuri);
    }

    function calcURI(uint _tokenId) public view returns (string memory) {
        return
            string.concat(
                ipfsURI,
                calcHash(_tokenId)
            );
    }

    function generateJSON(uint _tokenId) private view returns (string memory) {
        // Using the BokkyPooBahsDateTimeLibrary to convert the timestamp to a date
        // This library stops working beyond the year 2345
        // The question remails : is assuming your code will break in 300 years ethereum aligned?

        (uint year, uint month, uint day, , ,) = BokkyPooBahsDateTimeLibrary.timestampToDateTime(lastMintTimestamp + flowDuration);
        string memory fullDate = string.concat(
            Strings.toString(year),
            "-",
            Strings.toString(month),
            "-",
            Strings.toString(day)
        );

        string memory stringFlowRate = string.concat(
            Strings.toString(
            uint96(
                pool.getMemberFlowRate(minter[_tokenId])
            )
        ),
        " wei/s"
        );

        return string(
            abi.encodePacked(
                "data:application/json;base64,",
                Base64.encode(
                    bytes(
                        abi.encodePacked(
                            '{"name":"Superfluid Ecosystem Rewards Pass",',
                            '"description":"An NFT to celebrate the launch of Superfluid Distribution Pools.",',
                            '"animation_url":"',
                            calcURI(_tokenId),
                            '",',
                            '"attributes":[',
                                '{',
                                    '"trait_type":"FlowRate",',
                                    '"value":"',
                                    stringFlowRate,
                                '"},',
                                '{',
                                    '"trait_type":"EndOfFlowDate",',
                                    '"value":"',
                                    fullDate,
                                '"}',
                            ']}'
                        )
                    )
                )
            )
        );
    }

    // token URI:
    function tokenURI(uint _tokenId) public view override returns (string memory) {
        return generateJSON(_tokenId);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity >= 0.8.11;

import { ISuperAgreement } from "../superfluid/ISuperAgreement.sol";
import { ISuperfluidToken } from "../superfluid/ISuperfluidToken.sol";

/**
 * @title Constant Flow Agreement interface
 * @author Superfluid
 */
abstract contract IConstantFlowAgreementV1 is ISuperAgreement {

    /**************************************************************************
     * Errors
     *************************************************************************/
    error CFA_ACL_NO_SENDER_CREATE();               // 0x4b993136
    error CFA_ACL_NO_SENDER_UPDATE();               // 0xedfa0d3b
    error CFA_ACL_OPERATOR_NO_CREATE_PERMISSIONS(); // 0xa3eab6ac
    error CFA_ACL_OPERATOR_NO_UPDATE_PERMISSIONS(); // 0xac434b5f
    error CFA_ACL_OPERATOR_NO_DELETE_PERMISSIONS(); // 0xe30f1bff
    error CFA_ACL_FLOW_RATE_ALLOWANCE_EXCEEDED();   // 0xa0645c1f
    error CFA_ACL_UNCLEAN_PERMISSIONS();            // 0x7939d66c
    error CFA_ACL_NO_SENDER_FLOW_OPERATOR();        // 0xb0ed394d
    error CFA_ACL_NO_NEGATIVE_ALLOWANCE();          // 0x86e0377d
    error CFA_FLOW_ALREADY_EXISTS();                // 0x801b6863
    error CFA_FLOW_DOES_NOT_EXIST();                // 0x5a32bf24
    error CFA_INSUFFICIENT_BALANCE();               // 0xea76c9b3
    error CFA_ZERO_ADDRESS_SENDER();                // 0x1ce9b067
    error CFA_ZERO_ADDRESS_RECEIVER();              // 0x78e02b2a
    error CFA_HOOK_OUT_OF_GAS();                    // 0x9f76430b
    error CFA_DEPOSIT_TOO_BIG();                    // 0x752c2b9c
    error CFA_FLOW_RATE_TOO_BIG();                  // 0x0c9c55c1
    error CFA_NON_CRITICAL_SENDER();                // 0xce11b5d1
    error CFA_INVALID_FLOW_RATE();                  // 0x91acad16
    error CFA_NO_SELF_FLOW();                       // 0xa47338ef

    /// @dev ISuperAgreement.agreementType implementation
    function agreementType() external override pure returns (bytes32) {
        return keccak256("org.superfluid-finance.agreements.ConstantFlowAgreement.v1");
    }

    /**
     * @notice Get the maximum flow rate allowed with the deposit
     * @dev The deposit is clipped and rounded down
     * @param deposit Deposit amount used for creating the flow
     * @return flowRate The maximum flow rate
     */
    function getMaximumFlowRateFromDeposit(
        ISuperfluidToken token,
        uint256 deposit)
        external view virtual
        returns (int96 flowRate);

    /**
     * @notice Get the deposit required for creating the flow
     * @dev Calculates the deposit based on the liquidationPeriod and flowRate
     * @param flowRate Flow rate to be tested
     * @return deposit The deposit amount based on flowRate and liquidationPeriod
     * @custom:note
     * - if calculated deposit (flowRate * liquidationPeriod) is less
     *   than the minimum deposit, we use the minimum deposit otherwise
     *   we use the calculated deposit
     */
    function getDepositRequiredForFlowRate(
        ISuperfluidToken token,
        int96 flowRate)
        external view virtual
        returns (uint256 deposit);

    /**
     * @dev Returns whether it is the patrician period based on host.getNow()
     * @param account The account we are interested in
     * @return isCurrentlyPatricianPeriod Whether it is currently the patrician period dictated by governance
     * @return timestamp The value of host.getNow()
     */
    function isPatricianPeriodNow(
        ISuperfluidToken token,
        address account)
        external view virtual
        returns (bool isCurrentlyPatricianPeriod, uint256 timestamp);

    /**
     * @dev Returns whether it is the patrician period based on timestamp
     * @param account The account we are interested in
     * @param timestamp The timestamp we are interested in observing the result of isPatricianPeriod
     * @return bool Whether it is currently the patrician period dictated by governance
     */
    function isPatricianPeriod(
        ISuperfluidToken token,
        address account,
        uint256 timestamp
    )
        public view virtual
        returns (bool);

    /**
     * @dev msgSender from `ctx` updates permissions for the `flowOperator` with `flowRateAllowance`
     * @param token Super token address
     * @param flowOperator The permission grantee address
     * @param permissions A bitmask representation of the granted permissions
     * @param flowRateAllowance The flow rate allowance the `flowOperator` is granted (only goes down)
     * @param ctx Context bytes (see ISuperfluid.sol for Context struct)
     */
    function updateFlowOperatorPermissions(
        ISuperfluidToken token,
        address flowOperator,
        uint8 permissions,
        int96 flowRateAllowance,
        bytes calldata ctx
    )
        external virtual
        returns(bytes memory newCtx);

    /**
     * @notice msgSender from `ctx` increases flow rate allowance for the `flowOperator` by `addedFlowRateAllowance`
     * @dev if `addedFlowRateAllowance` is negative, we revert with CFA_ACL_NO_NEGATIVE_ALLOWANCE
     * @param token Super token address
     * @param flowOperator The permission grantee address
     * @param addedFlowRateAllowance The flow rate allowance delta
     * @param ctx Context bytes (see ISuperfluid.sol for Context struct)
     * @return newCtx The new context bytes
     */
    function increaseFlowRateAllowance(
        ISuperfluidToken token,
        address flowOperator,
        int96 addedFlowRateAllowance,
        bytes calldata ctx
    ) external virtual returns(bytes memory newCtx);

    /**
     * @dev msgSender from `ctx` decreases flow rate allowance for the `flowOperator` by `subtractedFlowRateAllowance`
     * @dev if `subtractedFlowRateAllowance` is negative, we revert with CFA_ACL_NO_NEGATIVE_ALLOWANCE
     * @param token Super token address
     * @param flowOperator The permission grantee address
     * @param subtractedFlowRateAllowance The flow rate allowance delta
     * @param ctx Context bytes (see ISuperfluid.sol for Context struct)
     * @return newCtx The new context bytes
     */
    function decreaseFlowRateAllowance(
        ISuperfluidToken token,
        address flowOperator,
        int96 subtractedFlowRateAllowance,
        bytes calldata ctx
    ) external virtual returns(bytes memory newCtx);

    /**
     * @dev msgSender from `ctx` increases flow rate allowance for the `flowOperator` by `addedFlowRateAllowance`
     * @dev if `addedFlowRateAllowance` is negative, we revert with CFA_ACL_NO_NEGATIVE_ALLOWANCE
     * @param token Super token address
     * @param flowOperator The permission grantee address
     * @param permissionsToAdd A bitmask representation of the granted permissions to add as a delta
     * @param addedFlowRateAllowance The flow rate allowance delta
     * @param ctx Context bytes (see ISuperfluid.sol for Context struct)
     * @return newCtx The new context bytes
     */
    function increaseFlowRateAllowanceWithPermissions(
        ISuperfluidToken token,
        address flowOperator,
        uint8 permissionsToAdd,
        int96 addedFlowRateAllowance,
        bytes calldata ctx
    ) external virtual returns(bytes memory newCtx);

    /**
     * @dev msgSender from `ctx` decreases flow rate allowance for the `flowOperator` by `subtractedFlowRateAllowance`
     * @dev if `subtractedFlowRateAllowance` is negative, we revert with CFA_ACL_NO_NEGATIVE_ALLOWANCE
     * @param token Super token address
     * @param flowOperator The permission grantee address
     * @param permissionsToRemove A bitmask representation of the granted permissions to remove as a delta
     * @param subtractedFlowRateAllowance The flow rate allowance delta
     * @param ctx Context bytes (see ISuperfluid.sol for Context struct)
     * @return newCtx The new context bytes
     */
    function decreaseFlowRateAllowanceWithPermissions(
        ISuperfluidToken token,
        address flowOperator,
        uint8 permissionsToRemove,
        int96 subtractedFlowRateAllowance,
        bytes calldata ctx
    ) external virtual returns(bytes memory newCtx);

    /**
     * @dev msgSender from `ctx` grants `flowOperator` all permissions with flowRateAllowance as type(int96).max
     * @param token Super token address
     * @param flowOperator The permission grantee address
     * @param ctx Context bytes (see ISuperfluid.sol for Context struct)
     */
    function authorizeFlowOperatorWithFullControl(
        ISuperfluidToken token,
        address flowOperator,
        bytes calldata ctx
    )
        external virtual
        returns(bytes memory newCtx);

     /**
     * @notice msgSender from `ctx` revokes `flowOperator` create/update/delete permissions
     * @dev `permissions` and `flowRateAllowance` will both be set to 0
     * @param token Super token address
     * @param flowOperator The permission grantee address
     * @param ctx Context bytes (see ISuperfluid.sol for Context struct)
     */
    function revokeFlowOperatorWithFullControl(
        ISuperfluidToken token,
        address flowOperator,
        bytes calldata ctx
    )
        external virtual
        returns(bytes memory newCtx);

    /**
     * @notice Get the permissions of a flow operator between `sender` and `flowOperator` for `token`
     * @param token Super token address
     * @param sender The permission granter address
     * @param flowOperator The permission grantee address
     * @return flowOperatorId The keccak256 hash of encoded string "flowOperator", sender and flowOperator
     * @return permissions A bitmask representation of the granted permissions
     * @return flowRateAllowance The flow rate allowance the `flowOperator` is granted (only goes down)
     */
    function getFlowOperatorData(
       ISuperfluidToken token,
       address sender,
       address flowOperator
    )
        public view virtual
        returns (
            bytes32 flowOperatorId,
            uint8 permissions,
            int96 flowRateAllowance
        );

    /**
     * @notice Get flow operator using flowOperatorId
     * @param token Super token address
     * @param flowOperatorId The keccak256 hash of encoded string "flowOperator", sender and flowOperator
     * @return permissions A bitmask representation of the granted permissions
     * @return flowRateAllowance The flow rate allowance the `flowOperator` is granted (only goes down)
     */
    function getFlowOperatorDataByID(
       ISuperfluidToken token,
       bytes32 flowOperatorId
    )
        external view virtual
        returns (
            uint8 permissions,
            int96 flowRateAllowance
        );

    /**
     * @notice Create a flow betwen ctx.msgSender and receiver
     * @dev flowId (agreementId) is the keccak256 hash of encoded sender and receiver
     * @param token Super token address
     * @param receiver Flow receiver address
     * @param flowRate New flow rate in amount per second
     * @param ctx Context bytes (see ISuperfluid.sol for Context struct)
     *
     * @custom:callbacks
     * - AgreementCreated
     *   - agreementId - can be used in getFlowByID
     *   - agreementData - abi.encode(address flowSender, address flowReceiver)
     *
     * @custom:note
     * - A deposit is taken as safety margin for the solvency agents
     * - A extra gas fee may be taken to pay for solvency agent liquidations
     */
    function createFlow(
        ISuperfluidToken token,
        address receiver,
        int96 flowRate,
        bytes calldata ctx
    )
        external virtual
        returns(bytes memory newCtx);

    /**
    * @notice Create a flow between sender and receiver
    * @dev A flow created by an approved flow operator (see above for details on callbacks)
    * @param token Super token address
    * @param sender Flow sender address (has granted permissions)
    * @param receiver Flow receiver address
    * @param flowRate New flow rate in amount per second
    * @param ctx Context bytes (see ISuperfluid.sol for Context struct)
    */
    function createFlowByOperator(
        ISuperfluidToken token,
        address sender,
        address receiver,
        int96 flowRate,
        bytes calldata ctx
    )
        external virtual
        returns(bytes memory newCtx);

    /**
     * @notice Update the flow rate between ctx.msgSender and receiver
     * @dev flowId (agreementId) is the keccak256 hash of encoded sender and receiver
     * @param token Super token address
     * @param receiver Flow receiver address
     * @param flowRate New flow rate in amount per second
     * @param ctx Context bytes (see ISuperfluid.sol for Context struct)
     *
     * @custom:callbacks
     * - AgreementUpdated
     *   - agreementId - can be used in getFlowByID
     *   - agreementData - abi.encode(address flowSender, address flowReceiver)
     *
     * @custom:note
     * - Only the flow sender may update the flow rate
     * - Even if the flow rate is zero, the flow is not deleted
     * from the system
     * - Deposit amount will be adjusted accordingly
     * - No new gas fee is charged
     */
    function updateFlow(
        ISuperfluidToken token,
        address receiver,
        int96 flowRate,
        bytes calldata ctx
    )
        external virtual
        returns(bytes memory newCtx);

    /**
    * @notice Update a flow between sender and receiver
    * @dev A flow updated by an approved flow operator (see above for details on callbacks)
    * @param token Super token address
    * @param sender Flow sender address (has granted permissions)
    * @param receiver Flow receiver address
    * @param flowRate New flow rate in amount per second
    * @param ctx Context bytes (see ISuperfluid.sol for Context struct)
    */
    function updateFlowByOperator(
        ISuperfluidToken token,
        address sender,
        address receiver,
        int96 flowRate,
        bytes calldata ctx
    )
        external virtual
        returns(bytes memory newCtx);

    /**
     * @dev Get the flow data between `sender` and `receiver` of `token`
     * @param token Super token address
     * @param sender Flow sender
     * @param receiver Flow receiver
     * @return timestamp Timestamp of when the flow is updated
     * @return flowRate The flow rate
     * @return deposit The amount of deposit the flow
     * @return owedDeposit The amount of owed deposit of the flow
     */
    function getFlow(
        ISuperfluidToken token,
        address sender,
        address receiver
    )
        external view virtual
        returns (
            uint256 timestamp,
            int96 flowRate,
            uint256 deposit,
            uint256 owedDeposit
        );

    /**
     * @notice Get flow data using agreementId
     * @dev flowId (agreementId) is the keccak256 hash of encoded sender and receiver
     * @param token Super token address
     * @param agreementId The agreement ID
     * @return timestamp Timestamp of when the flow is updated
     * @return flowRate The flow rate
     * @return deposit The deposit amount of the flow
     * @return owedDeposit The owed deposit amount of the flow
     */
    function getFlowByID(
       ISuperfluidToken token,
       bytes32 agreementId
    )
        external view virtual
        returns (
            uint256 timestamp,
            int96 flowRate,
            uint256 deposit,
            uint256 owedDeposit
        );

    /**
     * @dev Get the aggregated flow info of the account
     * @param token Super token address
     * @param account Account for the query
     * @return timestamp Timestamp of when a flow was last updated for account
     * @return flowRate The net flow rate of token for account
     * @return deposit The sum of all deposits for account's flows
     * @return owedDeposit The sum of all owed deposits for account's flows
     */
    function getAccountFlowInfo(
        ISuperfluidToken token,
        address account
    )
        external view virtual
        returns (
            uint256 timestamp,
            int96 flowRate,
            uint256 deposit,
            uint256 owedDeposit);

    /**
     * @dev Get the net flow rate of the account
     * @param token Super token address
     * @param account Account for the query
     * @return flowRate Net flow rate
     */
    function getNetFlow(
        ISuperfluidToken token,
        address account
    )
        external view virtual
        returns (int96 flowRate);

    /**
     * @notice Delete the flow between sender and receiver
     * @dev flowId (agreementId) is the keccak256 hash of encoded sender and receiver
     * @param token Super token address
     * @param ctx Context bytes (see ISuperfluid.sol for Context struct)
     * @param receiver Flow receiver address
     *
     * @custom:callbacks
     * - AgreementTerminated
     *   - agreementId - can be used in getFlowByID
     *   - agreementData - abi.encode(address flowSender, address flowReceiver)
     *
     * @custom:note
     * - Both flow sender and receiver may delete the flow
     * - If Sender account is insolvent or in critical state, a solvency agent may
     *   also terminate the agreement
     * - Gas fee may be returned to the sender
     */
    function deleteFlow(
        ISuperfluidToken token,
        address sender,
        address receiver,
        bytes calldata ctx
    )
        external virtual
        returns(bytes memory newCtx);

    /**
     * @notice Delete the flow between sender and receiver
     * @dev A flow deleted by an approved flow operator (see above for details on callbacks)
     * @param token Super token address
     * @param ctx Context bytes (see ISuperfluid.sol for Context struct)
     * @param receiver Flow receiver address
     */
    function deleteFlowByOperator(
        ISuperfluidToken token,
        address sender,
        address receiver,
        bytes calldata ctx
    )
        external virtual
        returns(bytes memory newCtx);

    /**
     * @dev Flow operator updated event
     * @param token Super token address
     * @param sender Flow sender address
     * @param flowOperator Flow operator address
     * @param permissions Octo bitmask representation of permissions
     * @param flowRateAllowance The flow rate allowance the `flowOperator` is granted (only goes down)
     */
    event FlowOperatorUpdated(
        ISuperfluidToken indexed token,
        address indexed sender,
        address indexed flowOperator,
        uint8 permissions,
        int96 flowRateAllowance
    );

    /**
     * @dev Flow updated event
     * @param token Super token address
     * @param sender Flow sender address
     * @param receiver Flow recipient address
     * @param flowRate Flow rate in amount per second for this flow
     * @param totalSenderFlowRate Total flow rate in amount per second for the sender
     * @param totalReceiverFlowRate Total flow rate in amount per second for the receiver
     * @param userData The user provided data
     *
     */
    event FlowUpdated(
        ISuperfluidToken indexed token,
        address indexed sender,
        address indexed receiver,
        int96 flowRate,
        int256 totalSenderFlowRate,
        int256 totalReceiverFlowRate,
        bytes userData
    );

    /**
     * @dev Flow updated extension event
     * @param flowOperator Flow operator address - the Context.msgSender
     * @param deposit The deposit amount for the stream
     */
    event FlowUpdatedExtension(
        address indexed flowOperator,
        uint256 deposit
    );
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.11;

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

interface IConstantInflowNFT is IFlowNFTBase {
    /**************************************************************************
     * Custom Errors
     *************************************************************************/
    error CIF_NFT_ONLY_CONSTANT_OUTFLOW(); // 0xe81ef57a

    /**************************************************************************
     * Write Functions
     *************************************************************************/

    /// @notice The mint function emits the "mint" `Transfer` event.
    /// @dev We don't modify storage as this is handled in ConstantOutflowNFT.sol and this function's sole purpose
    /// is to inform clients that search for events.
    /// @param to the flow receiver (inflow NFT receiver)
    /// @param newTokenId the new token id
    function mint(address to, uint256 newTokenId) external;

    /// @notice This burn function emits the "burn" `Transfer` event.
    /// @dev We don't modify storage as this is handled in ConstantOutflowNFT.sol and this function's sole purpose
    /// is to inform clients that search for events.
    /// @param tokenId desired token id to burn
    function burn(uint256 tokenId) external;
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.11;

import { ISuperfluidToken } from "./ISuperfluidToken.sol";
import { IFlowNFTBase } from "./IFlowNFTBase.sol";

interface IConstantOutflowNFT is IFlowNFTBase {
    /**************************************************************************
     * Custom Errors
     *************************************************************************/

    error COF_NFT_INVALID_SUPER_TOKEN();            // 0x6de98774
    error COF_NFT_MINT_TO_AND_FLOW_RECEIVER_SAME(); // 0x0d1d1161
    error COF_NFT_MINT_TO_ZERO_ADDRESS();           // 0x43d05e51
    error COF_NFT_ONLY_CONSTANT_INFLOW();           // 0xa495a718
    error COF_NFT_ONLY_FLOW_AGREEMENTS();           // 0xd367b64f
    error COF_NFT_TOKEN_ALREADY_EXISTS();           // 0xe2480183


    /**************************************************************************
     * Write Functions
     *************************************************************************/

    /// @notice The onCreate function is called when a new flow is created.
    /// @param token the super token passed from the CFA (flowVars)
    /// @param flowSender the flow sender
    /// @param flowReceiver the flow receiver
    function onCreate(ISuperfluidToken token, address flowSender, address flowReceiver) external;

    /// @notice The onUpdate function is called when a flow is updated.
    /// @param token the super token passed from the CFA (flowVars)
    /// @param flowSender the flow sender
    /// @param flowReceiver the flow receiver
    function onUpdate(ISuperfluidToken token, address flowSender, address flowReceiver) external;

    /// @notice The onDelete function is called when a flow is deleted.
    /// @param token the super token passed from the CFA (flowVars)
    /// @param flowSender the flow sender
    /// @param flowReceiver the flow receiver
    function onDelete(ISuperfluidToken token, address flowSender, address flowReceiver) external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (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);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";

/**
 * @dev Interface for the optional metadata functions from the ERC20 standard.
 *
 * _Available since v4.1._
 */
interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

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

    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}

// 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);
}

// 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);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol)

pragma solidity ^0.8.0;

/**
 * @title ERC721 token receiver interface
 * @dev Interface for any contract that wants to support safeTransfers
 * from ERC721 asset contracts.
 */
interface IERC721Receiver {
    /**
     * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
     * by `operator` from `from`, this function is called.
     *
     * It must return its Solidity selector to confirm the token transfer.
     * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
     *
     * The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`.
     */
    function onERC721Received(
        address operator,
        address from,
        uint256 tokenId,
        bytes calldata data
    ) external returns (bytes4);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC777/IERC777.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC777Token standard as defined in the EIP.
 *
 * This contract uses the
 * https://eips.ethereum.org/EIPS/eip-1820[ERC1820 registry standard] to let
 * token holders and recipients react to token movements by using setting implementers
 * for the associated interfaces in said registry. See {IERC1820Registry} and
 * {ERC1820Implementer}.
 */
interface IERC777 {
    /**
     * @dev Emitted when `amount` tokens are created by `operator` and assigned to `to`.
     *
     * Note that some additional user `data` and `operatorData` can be logged in the event.
     */
    event Minted(address indexed operator, address indexed to, uint256 amount, bytes data, bytes operatorData);

    /**
     * @dev Emitted when `operator` destroys `amount` tokens from `account`.
     *
     * Note that some additional user `data` and `operatorData` can be logged in the event.
     */
    event Burned(address indexed operator, address indexed from, uint256 amount, bytes data, bytes operatorData);

    /**
     * @dev Emitted when `operator` is made operator for `tokenHolder`.
     */
    event AuthorizedOperator(address indexed operator, address indexed tokenHolder);

    /**
     * @dev Emitted when `operator` is revoked its operator status for `tokenHolder`.
     */
    event RevokedOperator(address indexed operator, address indexed tokenHolder);

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

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the smallest part of the token that is not divisible. This
     * means all token operations (creation, movement and destruction) must have
     * amounts that are a multiple of this number.
     *
     * For most token contracts, this value will equal 1.
     */
    function granularity() external view returns (uint256);

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

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

    /**
     * @dev Moves `amount` tokens from the caller's account to `recipient`.
     *
     * If send or receive hooks are registered for the caller and `recipient`,
     * the corresponding functions will be called with `data` and empty
     * `operatorData`. See {IERC777Sender} and {IERC777Recipient}.
     *
     * Emits a {Sent} event.
     *
     * Requirements
     *
     * - the caller must have at least `amount` tokens.
     * - `recipient` cannot be the zero address.
     * - if `recipient` is a contract, it must implement the {IERC777Recipient}
     * interface.
     */
    function send(address recipient, uint256 amount, bytes calldata data) external;

    /**
     * @dev Destroys `amount` tokens from the caller's account, reducing the
     * total supply.
     *
     * If a send hook is registered for the caller, the corresponding function
     * will be called with `data` and empty `operatorData`. See {IERC777Sender}.
     *
     * Emits a {Burned} event.
     *
     * Requirements
     *
     * - the caller must have at least `amount` tokens.
     */
    function burn(uint256 amount, bytes calldata data) external;

    /**
     * @dev Returns true if an account is an operator of `tokenHolder`.
     * Operators can send and burn tokens on behalf of their owners. All
     * accounts are their own operator.
     *
     * See {operatorSend} and {operatorBurn}.
     */
    function isOperatorFor(address operator, address tokenHolder) external view returns (bool);

    /**
     * @dev Make an account an operator of the caller.
     *
     * See {isOperatorFor}.
     *
     * Emits an {AuthorizedOperator} event.
     *
     * Requirements
     *
     * - `operator` cannot be calling address.
     */
    function authorizeOperator(address operator) external;

    /**
     * @dev Revoke an account's operator status for the caller.
     *
     * See {isOperatorFor} and {defaultOperators}.
     *
     * Emits a {RevokedOperator} event.
     *
     * Requirements
     *
     * - `operator` cannot be calling address.
     */
    function revokeOperator(address operator) external;

    /**
     * @dev Returns the list of default operators. These accounts are operators
     * for all token holders, even if {authorizeOperator} was never called on
     * them.
     *
     * This list is immutable, but individual holders may revoke these via
     * {revokeOperator}, in which case {isOperatorFor} will return false.
     */
    function defaultOperators() external view returns (address[] memory);

    /**
     * @dev Moves `amount` tokens from `sender` to `recipient`. The caller must
     * be an operator of `sender`.
     *
     * If send or receive hooks are registered for `sender` and `recipient`,
     * the corresponding functions will be called with `data` and
     * `operatorData`. See {IERC777Sender} and {IERC777Recipient}.
     *
     * Emits a {Sent} event.
     *
     * Requirements
     *
     * - `sender` cannot be the zero address.
     * - `sender` must have at least `amount` tokens.
     * - the caller must be an operator for `sender`.
     * - `recipient` cannot be the zero address.
     * - if `recipient` is a contract, it must implement the {IERC777Recipient}
     * interface.
     */
    function operatorSend(
        address sender,
        address recipient,
        uint256 amount,
        bytes calldata data,
        bytes calldata operatorData
    ) external;

    /**
     * @dev Destroys `amount` tokens from `account`, reducing the total supply.
     * The caller must be an operator of `account`.
     *
     * If a send hook is registered for `account`, the corresponding function
     * will be called with `data` and `operatorData`. See {IERC777Sender}.
     *
     * Emits a {Burned} event.
     *
     * Requirements
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     * - the caller must be an operator for `account`.
     */
    function operatorBurn(address account, uint256 amount, bytes calldata data, bytes calldata operatorData) external;

    event Sent(
        address indexed operator,
        address indexed from,
        address indexed to,
        uint256 amount,
        bytes data,
        bytes operatorData
    );
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.11;

import { IERC721Metadata } from "@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol";

interface IFlowNFTBase is IERC721Metadata {
    // FlowNFTData struct storage packing:
    // b = bits
    // WORD 1: | superToken      | FREE
    //         | 160b            | 96b
    // WORD 2: | flowSender      | FREE
    //         | 160b            | 96b
    // WORD 3: | flowReceiver    | flowStartDate | FREE
    //         | 160b            | 32b           | 64b
    struct FlowNFTData {
        address superToken;
        address flowSender;
        address flowReceiver;
        uint32 flowStartDate;
    }

    /**************************************************************************
     * Custom Errors
     *************************************************************************/

    error CFA_NFT_APPROVE_CALLER_NOT_OWNER_OR_APPROVED_FOR_ALL();   // 0xa3352582
    error CFA_NFT_APPROVE_TO_CALLER();                              // 0xd3c77329
    error CFA_NFT_APPROVE_TO_CURRENT_OWNER();                       // 0xe4790b25
    error CFA_NFT_INVALID_TOKEN_ID();                               // 0xeab95e3b
    error CFA_NFT_ONLY_SUPER_TOKEN_FACTORY();                       // 0xebb7505b
    error CFA_NFT_TRANSFER_CALLER_NOT_OWNER_OR_APPROVED_FOR_ALL();  // 0x2551d606
    error CFA_NFT_TRANSFER_FROM_INCORRECT_OWNER();                  // 0x5a26c744
    error CFA_NFT_TRANSFER_IS_NOT_ALLOWED();                        // 0xaa747eca
    error CFA_NFT_TRANSFER_TO_ZERO_ADDRESS();                       // 0xde06d21e

    /**************************************************************************
     * Events
     *************************************************************************/

    /// @notice Informs third-party platforms that NFT metadata should be updated
    /// @dev This event comes from https://eips.ethereum.org/EIPS/eip-4906
    /// @param tokenId the id of the token that should have its metadata updated
    event MetadataUpdate(uint256 tokenId);

    /**************************************************************************
     * View
     *************************************************************************/

    /// @notice An external function for querying flow data by `tokenId``
    /// @param tokenId the token id
    /// @return flowData the flow data associated with `tokenId`
    function flowDataByTokenId(
        uint256 tokenId
    ) external view returns (FlowNFTData memory flowData);

    /// @notice An external function for computing the deterministic tokenId
    /// @dev tokenId = uint256(keccak256(abi.encode(block.chainId, superToken, flowSender, flowReceiver)))
    /// @param superToken the super token
    /// @param flowSender the flow sender
    /// @param flowReceiver the flow receiver
    /// @return tokenId the tokenId
    function getTokenId(
        address superToken,
        address flowSender,
        address flowReceiver
    ) external view returns (uint256);

    /**************************************************************************
     * Write
     *************************************************************************/

    function initialize(
        string memory nftName,
        string memory nftSymbol
    ) external; // initializer;

    function triggerMetadataUpdate(uint256 tokenId) external;
}

// SPDX-License-Identifier: AGPLv3
pragma solidity >=0.8.4;

import { ISuperAgreement } from "../../superfluid/ISuperAgreement.sol";
import { ISuperfluidToken } from "../../superfluid/ISuperfluidToken.sol";
import { ISuperfluidPool } from "../../agreements/gdav1/ISuperfluidPool.sol";

struct PoolConfig {
    /// @dev if true, the pool members can transfer their owned units
    /// else, only the pool admin can manipulate the units for pool members
    bool transferabilityForUnitsOwner;
    /// @dev if true, anyone can execute distributions via the pool
    /// else, only the pool admin can execute distributions via the pool
    bool distributionFromAnyAddress;
}

/**
 * @title General Distribution Agreement interface
 * @author Superfluid
 */
abstract contract IGeneralDistributionAgreementV1 is ISuperAgreement {
    // Structs
    struct UniversalIndexData {
        int96 flowRate;
        uint32 settledAt;
        uint256 totalBuffer;
        bool isPool;
        int256 settledValue;
    }

    struct FlowDistributionData {
        uint32 lastUpdated;
        int96 flowRate;
        uint256 buffer; // stored as uint96
    }

    struct PoolMemberData {
        address pool;
        uint32 poolID; // the slot id in the pool's subs bitmap
    }

    struct StackVarsLiquidation {
        ISuperfluidToken token;
        int256 availableBalance;
        address sender;
        bytes32 distributionFlowHash;
        int256 signedTotalGDADeposit;
        address liquidator;
    }


    // Custom Errors
    error GDA_DISTRIBUTE_FOR_OTHERS_NOT_ALLOWED();          // 0xf67d263e
    error GDA_DISTRIBUTE_FROM_ANY_ADDRESS_NOT_ALLOWED();    // 0x7761a5e5
    error GDA_FLOW_DOES_NOT_EXIST();                        // 0x29f4697e
    error GDA_NON_CRITICAL_SENDER();                        // 0x666f381d
    error GDA_INSUFFICIENT_BALANCE();                       // 0x33115c3f
    error GDA_NO_NEGATIVE_FLOW_RATE();                      // 0x15f25663
    error GDA_ADMIN_CANNOT_BE_POOL();                       // 0x9ab88a26
    error GDA_NOT_POOL_ADMIN();                             // 0x3a87e565
    error GDA_NO_ZERO_ADDRESS_ADMIN();                      // 0x82c5d837
    error GDA_ONLY_SUPER_TOKEN_POOL();                      // 0x90028c37


    // Events
    event InstantDistributionUpdated(
        ISuperfluidToken indexed token,
        ISuperfluidPool indexed pool,
        address indexed distributor,
        address operator,
        uint256 requestedAmount,
        uint256 actualAmount,
        bytes userData
    );

    event FlowDistributionUpdated(
        ISuperfluidToken indexed token,
        ISuperfluidPool indexed pool,
        address indexed distributor,
        // operator's have permission to liquidate critical flows
        // on behalf of others
        address operator,
        int96 oldFlowRate,
        int96 newDistributorToPoolFlowRate,
        int96 newTotalDistributionFlowRate,
        address adjustmentFlowRecipient,
        int96 adjustmentFlowRate,
        bytes userData
    );

    event PoolCreated(ISuperfluidToken indexed token, address indexed admin, ISuperfluidPool pool);

    event PoolConnectionUpdated(
        ISuperfluidToken indexed token,
        ISuperfluidPool indexed pool,
        address indexed account,
        bool connected,
        bytes userData
    );

    event BufferAdjusted(
        ISuperfluidToken indexed token,
        ISuperfluidPool indexed pool,
        address indexed from,
        int256 bufferDelta,
        uint256 newBufferAmount,
        uint256 totalBufferAmount
    );

    /// @dev ISuperAgreement.agreementType implementation
    function agreementType() external pure override returns (bytes32) {
        return keccak256("org.superfluid-finance.agreements.GeneralDistributionAgreement.v1");
    }

    /// @dev Gets the GDA net flow rate of `account` for `token`.
    /// @param token The token address
    /// @param account The account address
    /// @return net flow rate
    function getNetFlow(ISuperfluidToken token, address account) external view virtual returns (int96);

    /// @notice Gets the GDA flow rate of `from` to `to` for `token`.
    /// @dev This is primarily used to get the flow distribution flow rate from a distributor to a pool or the
    /// adjustment flow rate of a pool.
    /// @param token The token address
    /// @param from The sender address
    /// @param to The receiver address (the pool)
    /// @return flow rate
    function getFlowRate(ISuperfluidToken token, address from, ISuperfluidPool to)
        external
        view
        virtual
        returns (int96);

    /// @notice Executes an optimistic estimation of what the actual flow distribution flow rate may be.
    /// The actual flow distribution flow rate is the flow rate that will be sent from `from`.
    /// NOTE: this is only precise in an atomic transaction. DO NOT rely on this if querying off-chain.
    /// @dev The difference between the requested flow rate and the actual flow rate is the adjustment flow rate,
    /// this adjustment flow rate goes to the pool admin.
    /// @param token The token address
    /// @param from The sender address
    /// @param to The pool address
    /// @param requestedFlowRate The requested flow rate
    /// @return actualFlowRate and totalDistributionFlowRate
    function estimateFlowDistributionActualFlowRate(
        ISuperfluidToken token,
        address from,
        ISuperfluidPool to,
        int96 requestedFlowRate
    ) external view virtual returns (int96 actualFlowRate, int96 totalDistributionFlowRate);

    /// @notice Executes an optimistic estimation of what the actual amount distributed may be.
    /// The actual amount distributed is the amount that will be sent from `from`.
    /// NOTE: this is only precise in an atomic transaction. DO NOT rely on this if querying off-chain.
    /// @dev The difference between the requested amount and the actual amount is the adjustment amount.
    /// @param token The token address
    /// @param from The sender address
    /// @param to The pool address
    /// @param requestedAmount The requested amount
    /// @return actualAmount
    function estimateDistributionActualAmount(
        ISuperfluidToken token,
        address from,
        ISuperfluidPool to,
        uint256 requestedAmount
    ) external view virtual returns (uint256 actualAmount);

    /// @notice Gets the adjustment flow rate of `pool` for `token`.
    /// @param pool The pool address
    /// @return adjustment flow rate
    function getPoolAdjustmentFlowRate(address pool) external view virtual returns (int96);

    ////////////////////////////////////////////////////////////////////////////////
    // Pool Operations
    ////////////////////////////////////////////////////////////////////////////////

    /// @notice Creates a new pool for `token` where the admin is `admin`.
    /// @param token The token address
    /// @param admin The admin of the pool
    /// @param poolConfig The pool configuration (see PoolConfig struct)
    function createPool(ISuperfluidToken token, address admin, PoolConfig memory poolConfig)
        external
        virtual
        returns (ISuperfluidPool pool);

    function updateMemberUnits(ISuperfluidPool pool, address memberAddress, uint128 newUnits, bytes calldata ctx)
        external
        virtual
        returns (bytes memory newCtx);

    function claimAll(ISuperfluidPool pool, address memberAddress, bytes calldata ctx)
        external
        virtual
        returns (bytes memory newCtx);

    /// @notice Connects `msg.sender` to `pool`.
    /// @dev This is used to connect a pool to the GDA.
    /// @param pool The pool address
    /// @param ctx Context bytes (see ISuperfluid.sol for Context struct)
    /// @return newCtx the new context bytes
    function connectPool(ISuperfluidPool pool, bytes calldata ctx) external virtual returns (bytes memory newCtx);

    /// @notice Disconnects `msg.sender` from `pool`.
    /// @dev This is used to disconnect a pool from the GDA.
    /// @param pool The pool address
    /// @param ctx Context bytes (see ISuperfluidPoolAdmin for Context struct)
    /// @return newCtx the new context bytes
    function disconnectPool(ISuperfluidPool pool, bytes calldata ctx) external virtual returns (bytes memory newCtx);

    /// @notice Checks whether `account` is a pool.
    /// @param token The token address
    /// @param account The account address
    /// @return true if `account` is a pool
    function isPool(ISuperfluidToken token, address account) external view virtual returns (bool);

    /// Check if an address is connected to the pool
    function isMemberConnected(ISuperfluidPool pool, address memberAddr) external view virtual returns (bool);

    /// Get pool adjustment flow information: (recipient, flowHash, flowRate)
    function getPoolAdjustmentFlowInfo(ISuperfluidPool pool) external view virtual returns (address, bytes32, int96);

    ////////////////////////////////////////////////////////////////////////////////
    // Agreement Operations
    ////////////////////////////////////////////////////////////////////////////////

    /// @notice Tries to distribute `requestedAmount` of `token` from `from` to `pool`.
    /// @dev NOTE: The actual amount distributed may differ.
    /// @param token The token address
    /// @param from The sender address
    /// @param pool The pool address
    /// @param requestedAmount The requested amount
    /// @param ctx Context bytes (see ISuperfluidPool for Context struct)
    /// @return newCtx the new context bytes
    function distribute(
        ISuperfluidToken token,
        address from,
        ISuperfluidPool pool,
        uint256 requestedAmount,
        bytes calldata ctx
    ) external virtual returns (bytes memory newCtx);

    /// @notice Tries to distributeFlow `requestedFlowRate` of `token` from `from` to `pool`.
    /// @dev NOTE: The actual distribution flow rate may differ.
    /// @param token The token address
    /// @param from The sender address
    /// @param pool The pool address
    /// @param requestedFlowRate The requested flow rate
    /// @param ctx Context bytes (see ISuperfluidPool for Context struct)
    /// @return newCtx the new context bytes
    function distributeFlow(
        ISuperfluidToken token,
        address from,
        ISuperfluidPool pool,
        int96 requestedFlowRate,
        bytes calldata ctx
    ) external virtual returns (bytes memory newCtx);

    ////////////////////////////////////////////////////////////////////////////////
    // Solvency Functions
    ////////////////////////////////////////////////////////////////////////////////

    /**
     * @dev Returns whether it is the patrician period based on host.getNow()
     * @param account The account we are interested in
     * @return isCurrentlyPatricianPeriod Whether it is currently the patrician period dictated by governance
     * @return timestamp The value of host.getNow()
     */
    function isPatricianPeriodNow(ISuperfluidToken token, address account)
        external
        view
        virtual
        returns (bool isCurrentlyPatricianPeriod, uint256 timestamp);

    /**
     * @dev Returns whether it is the patrician period based on timestamp
     * @param account The account we are interested in
     * @param timestamp The timestamp we are interested in observing the result of isPatricianPeriod
     * @return bool Whether it is currently the patrician period dictated by governance
     */
    function isPatricianPeriod(ISuperfluidToken token, address account, uint256 timestamp)
        public
        view
        virtual
        returns (bool);
}

// SPDX-License-Identifier: MIT
pragma solidity >= 0.8.11;

import { ISuperAgreement } from "../superfluid/ISuperAgreement.sol";
import { ISuperfluidToken } from "../superfluid/ISuperfluidToken.sol";

/**
 * @title Instant Distribution Agreement interface
 * @author Superfluid
 *
 * @notice 
 *   - A publisher can create as many as indices as possibly identifiable with `indexId`.
 *     - `indexId` is deliberately limited to 32 bits, to avoid the chance for sha-3 collision.
 *       Despite knowing sha-3 collision is only theoretical.
 *   - A publisher can create a subscription to an index for any subscriber.
 *   - A subscription consists of:
 *     - The index it subscribes to.
 *     - Number of units subscribed.
 *   - An index consists of:
 *     - Current value as `uint128 indexValue`.
 *     - Total units of the approved subscriptions as `uint128 totalUnitsApproved`.
 *     - Total units of the non approved subscription as `uint128 totalUnitsPending`.
 *   - A publisher can update an index with a new value that doesn't decrease.
 *   - A publisher can update a subscription with any number of units.
 *   - A publisher or a subscriber can delete a subscription and reset its units to zero.
 *   - A subscriber must approve the index in order to receive distributions from the publisher
 *     each time the index is updated.
 *     - The amount distributed is $$\Delta{index} * units$$
 *   - Distributions to a non approved subscription stays in the publisher's deposit until:
 *     - the subscriber approves the subscription (side effect),
 *     - the publisher updates the subscription (side effect),
 *     - the subscriber deletes the subscription even if it is never approved (side effect),
 *     - or the subscriber can explicitly claim them.
 */
abstract contract IInstantDistributionAgreementV1 is ISuperAgreement {

    /**************************************************************************
     * Errors
     *************************************************************************/
    error IDA_INDEX_SHOULD_GROW();             // 0xcfdca725
    error IDA_OPERATION_NOT_ALLOWED();         // 0x92da6d17
    error IDA_INDEX_ALREADY_EXISTS();          // 0x5c02a517
    error IDA_INDEX_DOES_NOT_EXIST();          // 0xedeaa63b
    error IDA_SUBSCRIPTION_DOES_NOT_EXIST();   // 0xb6c8c980
    error IDA_SUBSCRIPTION_ALREADY_APPROVED(); // 0x3eb2f849
    error IDA_SUBSCRIPTION_IS_NOT_APPROVED();  // 0x37412573
    error IDA_INSUFFICIENT_BALANCE();          // 0x16e759bb
    error IDA_ZERO_ADDRESS_SUBSCRIBER();       // 0xc90a4674

    /// @dev ISuperAgreement.agreementType implementation
    function agreementType() external override pure returns (bytes32) {
        return keccak256("org.superfluid-finance.agreements.InstantDistributionAgreement.v1");
    }

    /**************************************************************************
     * Index operations
     *************************************************************************/

    /**
     * @dev Create a new index for the publisher
     * @param token Super token address
     * @param indexId Id of the index
     * @param ctx Context bytes (see ISuperfluid.sol for Context struct)
     *
     * @custom:callbacks 
     * None
     */
    function createIndex(
        ISuperfluidToken token,
        uint32 indexId,
        bytes calldata ctx)
            external
            virtual
            returns(bytes memory newCtx);
    /**
    * @dev Index created event
    * @param token Super token address
    * @param publisher Index creator and publisher
    * @param indexId The specified indexId of the newly created index
    * @param userData The user provided data
    */
    event IndexCreated(
        ISuperfluidToken indexed token,
        address indexed publisher,
        uint32 indexed indexId,
        bytes userData);

    /**
     * @dev Query the data of a index
     * @param token Super token address
     * @param publisher The publisher of the index
     * @param indexId Id of the index
     * @return exist Does the index exist
     * @return indexValue Value of the current index
     * @return totalUnitsApproved Total units approved for the index
     * @return totalUnitsPending Total units pending approval for the index
     */
    function getIndex(
        ISuperfluidToken token,
        address publisher,
        uint32 indexId)
            external
            view
            virtual
            returns(
                bool exist,
                uint128 indexValue,
                uint128 totalUnitsApproved,
                uint128 totalUnitsPending);

    /**
     * @dev Calculate actual distribution amount
     * @param token Super token address
     * @param publisher The publisher of the index
     * @param indexId Id of the index
     * @param amount The amount of tokens desired to be distributed
     * @return actualAmount The amount to be distributed after ensuring no rounding errors
     * @return newIndexValue The index value given the desired amount of tokens to be distributed
     */
    function calculateDistribution(
       ISuperfluidToken token,
       address publisher,
       uint32 indexId,
       uint256 amount)
           external view
           virtual
           returns(
               uint256 actualAmount,
               uint128 newIndexValue);

    /**
     * @dev Update index value of an index
     * @param token Super token address
     * @param indexId Id of the index
     * @param indexValue Value of the index
     * @param ctx Context bytes (see ISuperfluid.sol for Context struct)
     *
     * @custom:callbacks 
     * None
     */
    function updateIndex(
        ISuperfluidToken token,
        uint32 indexId,
        uint128 indexValue,
        bytes calldata ctx)
            external
            virtual
            returns(bytes memory newCtx);
    /**
      * @dev Index updated event
      * @param token Super token address
      * @param publisher Index updater and publisher
      * @param indexId The specified indexId of the updated index
      * @param oldIndexValue The previous index value
      * @param newIndexValue The updated index value
      * @param totalUnitsPending The total units pending when the indexValue was updated
      * @param totalUnitsApproved The total units approved when the indexValue was updated
      * @param userData The user provided data
      */
    event IndexUpdated(
        ISuperfluidToken indexed token,
        address indexed publisher,
        uint32 indexed indexId,
        uint128 oldIndexValue,
        uint128 newIndexValue,
        uint128 totalUnitsPending,
        uint128 totalUnitsApproved,
        bytes userData);

    /**
     * @dev Distribute tokens through the index
     * @param token Super token address
     * @param indexId Id of the index
     * @param amount The amount of tokens desired to be distributed
     * @param ctx Context bytes (see ISuperfluid.sol for Context struct)
     *
     * @custom:note 
     * - This is a convenient version of updateIndex. It adds to the index
     *   a delta that equals to `amount / totalUnits`
     * - The actual amount distributed could be obtained via
     *   `calculateDistribution`. This is due to precision error with index
     *   value and units data range
     *
     * @custom:callbacks 
     * None
     */
    function distribute(
        ISuperfluidToken token,
        uint32 indexId,
        uint256 amount,
        bytes calldata ctx)
            external
            virtual
            returns(bytes memory newCtx);


    /**************************************************************************
     * Subscription operations
     *************************************************************************/

    /**
     * @dev Approve the subscription of an index
     * @param token Super token address
     * @param publisher The publisher of the index
     * @param indexId Id of the index
     * @param ctx Context bytes (see ISuperfluid.sol for Context struct)
     *
     * @custom:callbacks 
     * - if subscription exist
     *   - AgreementCreated callback to the publisher:
     *      - agreementId is for the subscription
     * - if subscription does not exist
     *   - AgreementUpdated callback to the publisher:
     *      - agreementId is for the subscription
     */
    function approveSubscription(
        ISuperfluidToken token,
        address publisher,
        uint32 indexId,
        bytes calldata ctx)
            external
            virtual
            returns(bytes memory newCtx);
    /**
      * @dev Index subscribed event
      * @param token Super token address
      * @param publisher Index publisher
      * @param indexId The specified indexId
      * @param subscriber The approved subscriber
      * @param userData The user provided data
      */
    event IndexSubscribed(
        ISuperfluidToken indexed token,
        address indexed publisher,
        uint32 indexed indexId,
        address subscriber,
        bytes userData);

    /**
      * @dev Subscription approved event
      * @param token Super token address
      * @param subscriber The approved subscriber
      * @param publisher Index publisher
      * @param indexId The specified indexId
      * @param userData The user provided data
      */
    event SubscriptionApproved(
        ISuperfluidToken indexed token,
        address indexed subscriber,
        address publisher,
        uint32 indexId,
        bytes userData);

    /**
    * @notice Revoke the subscription of an index
    * @dev "Unapproves" the subscription and moves approved units to pending
    * @param token Super token address
    * @param publisher The publisher of the index
    * @param indexId Id of the index
    * @param ctx Context bytes (see ISuperfluid.sol for Context struct)
    *
    * @custom:callbacks 
    * - AgreementUpdated callback to the publisher:
    *    - agreementId is for the subscription
    */
    function revokeSubscription(
        ISuperfluidToken token,
        address publisher,
        uint32 indexId,
        bytes calldata ctx)
         external
         virtual
         returns(bytes memory newCtx);
    /**
      * @dev Index unsubscribed event
      * @param token Super token address
      * @param publisher Index publisher
      * @param indexId The specified indexId
      * @param subscriber The unsubscribed subscriber
      * @param userData The user provided data
      */
    event IndexUnsubscribed(
        ISuperfluidToken indexed token,
        address indexed publisher,
        uint32 indexed indexId,
        address subscriber,
        bytes userData);
    
    /**
      * @dev Subscription approved event
      * @param token Super token address
      * @param subscriber The approved subscriber
      * @param publisher Index publisher
      * @param indexId The specified indexId
      * @param userData The user provided data
      */
    event SubscriptionRevoked(
        ISuperfluidToken indexed token,
        address indexed subscriber,
        address publisher,
        uint32 indexId,
        bytes userData);

    /**
     * @dev Update the nuber of units of a subscription
     * @param token Super token address
     * @param indexId Id of the index
     * @param subscriber The subscriber of the index
     * @param units Number of units of the subscription
     * @param ctx Context bytes (see ISuperfluid.sol for Context struct)
     *
     * @custom:callbacks 
     * - if subscription exist
     *   - AgreementCreated callback to the subscriber:
     *      - agreementId is for the subscription
     * - if subscription does not exist
     *   - AgreementUpdated callback to the subscriber:
     *      - agreementId is for the subscription
     */
    function updateSubscription(
        ISuperfluidToken token,
        uint32 indexId,
        address subscriber,
        uint128 units,
        bytes calldata ctx)
            external
            virtual
            returns(bytes memory newCtx);

    /**
      * @dev Index units updated event
      * @param token Super token address
      * @param publisher Index publisher
      * @param indexId The specified indexId
      * @param subscriber The subscriber units updated
      * @param units The new units amount
      * @param userData The user provided data
      */
    event IndexUnitsUpdated(
        ISuperfluidToken indexed token,
        address indexed publisher,
        uint32 indexed indexId,
        address subscriber,
        uint128 units,
        bytes userData);
    
    /**
      * @dev Subscription units updated event
      * @param token Super token address
      * @param subscriber The subscriber units updated
      * @param indexId The specified indexId
      * @param publisher Index publisher
      * @param units The new units amount
      * @param userData The user provided data
      */
    event SubscriptionUnitsUpdated(
        ISuperfluidToken indexed token,
        address indexed subscriber,
        address publisher,
        uint32 indexId,
        uint128 units,
        bytes userData);

    /**
     * @dev Get data of a subscription
     * @param token Super token address
     * @param publisher The publisher of the index
     * @param indexId Id of the index
     * @param subscriber The subscriber of the index
     * @return exist Does the subscription exist?
     * @return approved Is the subscription approved?
     * @return units Units of the suscription
     * @return pendingDistribution Pending amount of tokens to be distributed for unapproved subscription
     */
    function getSubscription(
        ISuperfluidToken token,
        address publisher,
        uint32 indexId,
        address subscriber)
            external
            view
            virtual
            returns(
                bool exist,
                bool approved,
                uint128 units,
                uint256 pendingDistribution
            );

    /**
     * @notice Get data of a subscription by agreement ID
     * @dev indexId (agreementId) is the keccak256 hash of encodePacked("publisher", publisher, indexId)
     * @param token Super token address
     * @param agreementId The agreement ID
     * @return publisher The publisher of the index
     * @return indexId Id of the index
     * @return approved Is the subscription approved?
     * @return units Units of the suscription
     * @return pendingDistribution Pending amount of tokens to be distributed for unapproved subscription
     */
    function getSubscriptionByID(
        ISuperfluidToken token,
        bytes32 agreementId)
            external
            view
            virtual
            returns(
                address publisher,
                uint32 indexId,
                bool approved,
                uint128 units,
                uint256 pendingDistribution
            );

    /**
     * @dev List subscriptions of an user
     * @param token Super token address
     * @param subscriber The subscriber's address
     * @return publishers Publishers of the subcriptions
     * @return indexIds Indexes of the subscriptions
     * @return unitsList Units of the subscriptions
     */
    function listSubscriptions(
        ISuperfluidToken token,
        address subscriber)
            external
            view
            virtual
            returns(
                address[] memory publishers,
                uint32[] memory indexIds,
                uint128[] memory unitsList);

    /**
     * @dev Delete the subscription of an user
     * @param token Super token address
     * @param publisher The publisher of the index
     * @param indexId Id of the index
     * @param subscriber The subscriber's address
     * @param ctx Context bytes (see ISuperfluid.sol for Context struct)
     *
     * @custom:callbacks 
     * - if the subscriber called it
     *   - AgreementTerminated callback to the publsiher:
     *      - agreementId is for the subscription
     * - if the publisher called it
     *   - AgreementTerminated callback to the subscriber:
     *      - agreementId is for the subscription
     */
    function deleteSubscription(
        ISuperfluidToken token,
        address publisher,
        uint32 indexId,
        address subscriber,
        bytes calldata ctx)
            external
            virtual
            returns(bytes memory newCtx);

    /**
    * @dev Claim pending distributions
    * @param token Super token address
    * @param publisher The publisher of the index
    * @param indexId Id of the index
    * @param subscriber The subscriber's address
    * @param ctx Context bytes (see ISuperfluid.sol for Context struct)
    *
    * @custom:note The subscription should not be approved yet
    *
    * @custom:callbacks 
    * - AgreementUpdated callback to the publisher:
    *    - agreementId is for the subscription
    */
    function claim(
        ISuperfluidToken token,
        address publisher,
        uint32 indexId,
        address subscriber,
        bytes calldata ctx)
        external
        virtual
        returns(bytes memory newCtx);
    
    /**
      * @dev Index distribution claimed event
      * @param token Super token address
      * @param publisher Index publisher
      * @param indexId The specified indexId
      * @param subscriber The subscriber units updated
      * @param amount The pending amount claimed
      */
    event IndexDistributionClaimed(
        ISuperfluidToken indexed token,
        address indexed publisher,
        uint32 indexed indexId,
        address subscriber,
        uint256 amount);
    
    /**
      * @dev Subscription distribution claimed event
      * @param token Super token address
      * @param subscriber The subscriber units updated
      * @param publisher Index publisher
      * @param indexId The specified indexId
      * @param amount The pending amount claimed
      */
    event SubscriptionDistributionClaimed(
        ISuperfluidToken indexed token,
        address indexed subscriber,
        address publisher,
        uint32 indexId,
        uint256 amount);

}

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.11;

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

interface IPoolAdminNFT is IPoolNFTBase {
    // PoolAdminNFTData struct storage packing:
    // b = bits
    // WORD 1: | pool   | FREE
    //         | 160b   | 96b
    // WORD 2: | admin  | FREE
    //         | 160b   | 96b
    struct PoolAdminNFTData {
        address pool;
        address admin;
    }

    /// Write Functions ///
    function mint(address pool) external;

    function poolAdminDataByTokenId(uint256 tokenId) external view returns (PoolAdminNFTData memory data);
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.11;

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

interface IPoolMemberNFT is IPoolNFTBase {
    // PoolMemberNFTData struct storage packing:
    // b = bits
    // WORD 1: | pool   | FREE
    //         | 160b   | 96b
    // WORD 2: | member | FREE
    //         | 160b   | 96b
    // WORD 3: | units  | FREE
    //         | 128b   | 128b
    struct PoolMemberNFTData {
        address pool;
        address member;
        uint128 units;
    }

    /// Errors ///

    error POOL_MEMBER_NFT_NO_ZERO_POOL();
    error POOL_MEMBER_NFT_NO_ZERO_MEMBER();
    error POOL_MEMBER_NFT_NO_UNITS();
    error POOL_MEMBER_NFT_HAS_UNITS();

    function onCreate(address pool, address member) external;

    function onUpdate(address pool, address member) external;

    function onDelete(address pool, address member) external;

    /// View Functions ///

    function poolMemberDataByTokenId(uint256 tokenId) external view returns (PoolMemberNFTData memory data);
}

// SPDX-License-Identifier: AGPLv3
pragma solidity >=0.8.4;

import { IERC721Metadata } from "@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol";

interface IPoolNFTBase is IERC721Metadata {
    error POOL_NFT_APPROVE_TO_CALLER();                             // 0x9212b333
    error POOL_NFT_ONLY_SUPER_TOKEN_FACTORY();                      // 0x1fd7e3d8
    error POOL_NFT_INVALID_TOKEN_ID();                              // 0x09275994
    error POOL_NFT_APPROVE_TO_CURRENT_OWNER();                      // 0x020226d3
    error POOL_NFT_APPROVE_CALLER_NOT_OWNER_OR_APPROVED_FOR_ALL();  // 0x1e82f255
    error POOL_NFT_NOT_REGISTERED_POOL();                           // 0x6421912e
    error POOL_NFT_TRANSFER_NOT_ALLOWED();                          // 0x432fb160
    error POOL_NFT_TRANSFER_CALLER_NOT_OWNER_OR_APPROVED_FOR_ALL(); // 0x4028ee0e

    /// @notice Informs third-party platforms that NFT metadata should be updated
    /// @dev This event comes from https://eips.ethereum.org/EIPS/eip-4906
    /// @param tokenId the id of the token that should have its metadata updated
    event MetadataUpdate(uint256 tokenId);

    function initialize(string memory nftName, string memory nftSymbol) external; // initializer;

    function triggerMetadataUpdate(uint256 tokenId) external;

    /// @notice Gets the token id
    /// @dev For PoolAdminNFT, `account` is admin and for PoolMemberNFT, `account` is member
    function getTokenId(address pool, address account) external view returns (uint256 tokenId);
}

// SPDX-License-Identifier: MIT
pragma solidity >= 0.8.11;

import { ISuperToken } from "../superfluid/ISuperToken.sol";


/**
 * @title Super ETH (SETH) custom token interface
 * @author Superfluid
 */
interface ISETHCustom {
    // using native token
    function upgradeByETH() external payable;
    function upgradeByETHTo(address to) external payable;
    function downgradeToETH(uint wad) external;
}

/**
 * @title Super ETH (SETH) full interface
 * @author Superfluid
 */
// solhint-disable-next-line no-empty-blocks
interface ISETH is ISETHCustom, ISuperToken {}

// SPDX-License-Identifier: MIT
pragma solidity >= 0.8.11;

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

/**
 * @title Super agreement interface
 * @author Superfluid
 */
interface ISuperAgreement {

    /**
     * @dev Get the type of the agreement class
     */
    function agreementType() external view returns (bytes32);

    /**
     * @dev Calculate the real-time balance for the account of this agreement class
     * @param account Account the state belongs to
     * @param time Time used for the calculation
     * @return dynamicBalance Dynamic balance portion of real-time balance of this agreement
     * @return deposit Account deposit amount of this agreement
     * @return owedDeposit Account owed deposit amount of this agreement
     */
    function realtimeBalanceOf(
        ISuperfluidToken token,
        address account,
        uint256 time
    )
        external
        view
        returns (
            int256 dynamicBalance,
            uint256 deposit,
            uint256 owedDeposit
        );

}

// SPDX-License-Identifier: MIT
pragma solidity >= 0.8.11;

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

/**
 * @title SuperApp interface
 * @author Superfluid
 * @dev Be aware of the app being jailed, when the word permitted is used.
 */
interface ISuperApp {

    /**
     * @dev Callback before a new agreement is created.
     * @param superToken The super token used for the agreement.
     * @param agreementClass The agreement class address.
     * @param agreementId The agreementId
     * @param agreementData The agreement data (non-compressed)
     * @param ctx The context data.
     * @return cbdata A free format in memory data the app can use to pass
     *          arbitary information to the after-hook callback.
     *
     * @custom:note 
     * - It will be invoked with `staticcall`, no state changes are permitted.
     * - Only revert with a "reason" is permitted.
     */
    function beforeAgreementCreated(
        ISuperToken superToken,
        address agreementClass,
        bytes32 agreementId,
        bytes calldata agreementData,
        bytes calldata ctx
    )
        external
        view
        returns (bytes memory cbdata);

    /**
     * @dev Callback after a new agreement is created.
     * @param superToken The super token used for the agreement.
     * @param agreementClass The agreement class address.
     * @param agreementId The agreementId
     * @param agreementData The agreement data (non-compressed)
     * @param cbdata The data returned from the before-hook callback.
     * @param ctx The context data.
     * @return newCtx The current context of the transaction.
     *
     * @custom:note 
     * - State changes is permitted.
     * - Only revert with a "reason" is permitted.
     */
    function afterAgreementCreated(
        ISuperToken superToken,
        address agreementClass,
        bytes32 agreementId,
        bytes calldata agreementData,
        bytes calldata cbdata,
        bytes calldata ctx
    )
        external
        returns (bytes memory newCtx);

    /**
     * @dev Callback before a new agreement is updated.
     * @param superToken The super token used for the agreement.
     * @param agreementClass The agreement class address.
     * @param agreementId The agreementId
     * @param agreementData The agreement data (non-compressed)
     * @param ctx The context data.
     * @return cbdata A free format in memory data the app can use to pass
     *          arbitary information to the after-hook callback.
     *
     * @custom:note 
     * - It will be invoked with `staticcall`, no state changes are permitted.
     * - Only revert with a "reason" is permitted.
     */
    function beforeAgreementUpdated(
        ISuperToken superToken,
        address agreementClass,
        bytes32 agreementId,
        bytes calldata agreementData,
        bytes calldata ctx
    )
        external
        view
        returns (bytes memory cbdata);


    /**
    * @dev Callback after a new agreement is updated.
    * @param superToken The super token used for the agreement.
    * @param agreementClass The agreement class address.
    * @param agreementId The agreementId
    * @param agreementData The agreement data (non-compressed)
    * @param cbdata The data returned from the before-hook callback.
    * @param ctx The context data.
    * @return newCtx The current context of the transaction.
    *
    * @custom:note 
    * - State changes is permitted.
    * - Only revert with a "reason" is permitted.
    */
    function afterAgreementUpdated(
        ISuperToken superToken,
        address agreementClass,
        bytes32 agreementId,
        bytes calldata agreementData,
        bytes calldata cbdata,
        bytes calldata ctx
    )
        external
        returns (bytes memory newCtx);

    /**
    * @dev Callback before a new agreement is terminated.
    * @param superToken The super token used for the agreement.
    * @param agreementClass The agreement class address.
    * @param agreementId The agreementId
    * @param agreementData The agreement data (non-compressed)
    * @param ctx The context data.
    * @return cbdata A free format in memory data the app can use to pass arbitary information to
    *         the after-hook callback.
    *
    * @custom:note 
    * - It will be invoked with `staticcall`, no state changes are permitted.
    * - Revert is not permitted.
    */
    function beforeAgreementTerminated(
        ISuperToken superToken,
        address agreementClass,
        bytes32 agreementId,
        bytes calldata agreementData,
        bytes calldata ctx
    )
        external
        view
        returns (bytes memory cbdata);

    /**
    * @dev Callback after a new agreement is terminated.
    * @param superToken The super token used for the agreement.
    * @param agreementClass The agreement class address.
    * @param agreementId The agreementId
    * @param agreementData The agreement data (non-compressed)
    * @param cbdata The data returned from the before-hook callback.
    * @param ctx The context data.
    * @return newCtx The current context of the transaction.
    *
    * @custom:note 
    * - State changes is permitted.
    * - Revert is not permitted.
    */
    function afterAgreementTerminated(
        ISuperToken superToken,
        address agreementClass,
        bytes32 agreementId,
        bytes calldata agreementData,
        bytes calldata cbdata,
        bytes calldata ctx
    )
        external
        returns (bytes memory newCtx);
}

// SPDX-License-Identifier: MIT
pragma solidity >= 0.8.11;

import { ISuperfluidToken } from "./ISuperfluidToken.sol";
import { IERC20, IERC20Metadata } from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";
import { IERC777 } from "@openzeppelin/contracts/token/ERC777/IERC777.sol";
import { IConstantOutflowNFT } from "./IConstantOutflowNFT.sol";
import { IConstantInflowNFT } from "./IConstantInflowNFT.sol";
import { IPoolAdminNFT } from "../agreements/gdav1/IPoolAdminNFT.sol";
import { IPoolMemberNFT } from "../agreements/gdav1/IPoolMemberNFT.sol";

/**
 * @title Super token (Superfluid Token + ERC20 + ERC777) interface
 * @author Superfluid
 */
interface ISuperToken is ISuperfluidToken, IERC20Metadata, IERC777 {

    /**************************************************************************
     * Errors
     *************************************************************************/
    error SUPER_TOKEN_CALLER_IS_NOT_OPERATOR_FOR_HOLDER();       // 0xf7f02227
    error SUPER_TOKEN_NOT_ERC777_TOKENS_RECIPIENT();             // 0xfe737d05
    error SUPER_TOKEN_INFLATIONARY_DEFLATIONARY_NOT_SUPPORTED(); // 0xe3e13698
    error SUPER_TOKEN_NO_UNDERLYING_TOKEN();                     // 0xf79cf656
    error SUPER_TOKEN_ONLY_SELF();                               // 0x7ffa6648
    error SUPER_TOKEN_ONLY_ADMIN();                              // 0x0484acab
    error SUPER_TOKEN_ONLY_GOV_OWNER();                          // 0xd9c7ed08
    error SUPER_TOKEN_APPROVE_FROM_ZERO_ADDRESS();               // 0x81638627
    error SUPER_TOKEN_APPROVE_TO_ZERO_ADDRESS();                 // 0xdf070274
    error SUPER_TOKEN_BURN_FROM_ZERO_ADDRESS();                  // 0xba2ab184
    error SUPER_TOKEN_MINT_TO_ZERO_ADDRESS();                    // 0x0d243157
    error SUPER_TOKEN_TRANSFER_FROM_ZERO_ADDRESS();              // 0xeecd6c9b
    error SUPER_TOKEN_TRANSFER_TO_ZERO_ADDRESS();                // 0xe219bd39
    error SUPER_TOKEN_NFT_PROXY_ADDRESS_CHANGED();               // 0x6bef249d

    /**
     * @dev Initialize the contract
     */
    function initialize(
        IERC20 underlyingToken,
        uint8 underlyingDecimals,
        string calldata n,
        string calldata s
    ) external;

    /**
     * @dev Initialize the contract with an admin
     */
    function initializeWithAdmin(
        IERC20 underlyingToken,
        uint8 underlyingDecimals,
        string calldata n,
        string calldata s,
        address admin
    ) external;

    /**
     * @notice Changes the admin for the SuperToken
     * @dev Only the current admin can call this function
     * if admin is address(0), it is implicitly the host address
     * @param newAdmin New admin address
     */
    function changeAdmin(address newAdmin) external;

    event AdminChanged(address indexed oldAdmin, address indexed newAdmin);

    /**
     * @dev Returns the admin address for the SuperToken
     */
    function getAdmin() external view returns (address admin);

    /**************************************************************************
    * Immutable variables
    *************************************************************************/

    // solhint-disable-next-line func-name-mixedcase
    function CONSTANT_OUTFLOW_NFT() external view returns (IConstantOutflowNFT);
    // solhint-disable-next-line func-name-mixedcase
    function CONSTANT_INFLOW_NFT() external view returns (IConstantInflowNFT);
    // solhint-disable-next-line func-name-mixedcase
    function POOL_ADMIN_NFT() external view returns (IPoolAdminNFT);
    // solhint-disable-next-line func-name-mixedcase
    function POOL_MEMBER_NFT() external view returns (IPoolMemberNFT);

    /**************************************************************************
    * IERC20Metadata & ERC777
    *************************************************************************/

    /**
     * @dev Returns the name of the token.
     */
    function name() external view override(IERC777, IERC20Metadata) returns (string memory);

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() external view override(IERC777, IERC20Metadata) returns (string memory);

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5,05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
     * called.
     *
     * @custom:note SuperToken always uses 18 decimals.
     *
     * This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() external view override(IERC20Metadata) returns (uint8);

    /**************************************************************************
    * ERC20 & ERC777
    *************************************************************************/

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() external view override(IERC777, IERC20) returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by an account (`owner`).
     */
    function balanceOf(address account) external view override(IERC777, IERC20) returns(uint256 balance);

    /**************************************************************************
    * ERC20
    *************************************************************************/

    /**
     * @dev Moves `amount` tokens from the caller's account to `recipient`.
     *
     * @return Returns Success a boolean value indicating whether the operation succeeded.
     *
     * @custom:emits a {Transfer} event.
     */
    function transfer(address recipient, uint256 amount) external override(IERC20) 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.
     *
     * @notice This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external override(IERC20) view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * @return Returns Success a boolean value indicating whether the operation succeeded.
     *
     * @custom:note 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
     *
     * @custom:emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external override(IERC20) returns (bool);

    /**
     * @dev Moves `amount` tokens from `sender` to `recipient` using the
     *         allowance mechanism. `amount` is then deducted from the caller's
     *         allowance.
     *
     * @return Returns Success a boolean value indicating whether the operation succeeded.
     *
     * @custom:emits a {Transfer} event.
     */
    function transferFrom(address sender, address recipient, uint256 amount) external override(IERC20) returns (bool);

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * @custom:emits an {Approval} event indicating the updated allowance.
     *
     * @custom:requirements
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) external returns (bool);

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * @custom:emits an {Approval} event indicating the updated allowance.
     *
     * @custom:requirements
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
     function decreaseAllowance(address spender, uint256 subtractedValue) external returns (bool);

    /**************************************************************************
    * ERC777
    *************************************************************************/

    /**
     * @dev Returns the smallest part of the token that is not divisible. This
     *         means all token operations (creation, movement and destruction) must have
     *         amounts that are a multiple of this number.
     *
     * @custom:note For super token contracts, this value is always 1
     */
    function granularity() external view override(IERC777) returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `recipient`.
     *
     * @dev If send or receive hooks are registered for the caller and `recipient`,
     *      the corresponding functions will be called with `userData` and empty
     *      `operatorData`. See {IERC777Sender} and {IERC777Recipient}.
     *
     * @custom:emits a {Sent} event.
     *
     * @custom:requirements
     * - the caller must have at least `amount` tokens.
     * - `recipient` cannot be the zero address.
     * - if `recipient` is a contract, it must implement the {IERC777Recipient}
     * interface.
     */
    function send(address recipient, uint256 amount, bytes calldata userData) external override(IERC777);

    /**
     * @dev Destroys `amount` tokens from the caller's account, reducing the
     * total supply and transfers the underlying token to the caller's account.
     *
     * If a send hook is registered for the caller, the corresponding function
     * will be called with `userData` and empty `operatorData`. See {IERC777Sender}.
     *
     * @custom:emits a {Burned} event.
     *
     * @custom:requirements
     * - the caller must have at least `amount` tokens.
     */
    function burn(uint256 amount, bytes calldata userData) external override(IERC777);

    /**
     * @dev Returns true if an account is an operator of `tokenHolder`.
     * Operators can send and burn tokens on behalf of their owners. All
     * accounts are their own operator.
     *
     * See {operatorSend} and {operatorBurn}.
     */
    function isOperatorFor(address operator, address tokenHolder) external override(IERC777) view returns (bool);

    /**
     * @dev Make an account an operator of the caller.
     *
     * See {isOperatorFor}.
     *
     * @custom:emits an {AuthorizedOperator} event.
     *
     * @custom:requirements
     * - `operator` cannot be calling address.
     */
    function authorizeOperator(address operator) external override(IERC777);

    /**
     * @dev Revoke an account's operator status for the caller.
     *
     * See {isOperatorFor} and {defaultOperators}.
     *
     * @custom:emits a {RevokedOperator} event.
     *
     * @custom:requirements
     * - `operator` cannot be calling address.
     */
    function revokeOperator(address operator) external override(IERC777);

    /**
     * @dev Returns the list of default operators. These accounts are operators
     * for all token holders, even if {authorizeOperator} was never called on
     * them.
     *
     * This list is immutable, but individual holders may revoke these via
     * {revokeOperator}, in which case {isOperatorFor} will return false.
     */
    function defaultOperators() external override(IERC777) view returns (address[] memory);

    /**
     * @dev Moves `amount` tokens from `sender` to `recipient`. The caller must
     * be an operator of `sender`.
     *
     * If send or receive hooks are registered for `sender` and `recipient`,
     * the corresponding functions will be called with `userData` and
     * `operatorData`. See {IERC777Sender} and {IERC777Recipient}.
     *
     * @custom:emits a {Sent} event.
     *
     * @custom:requirements
     * - `sender` cannot be the zero address.
     * - `sender` must have at least `amount` tokens.
     * - the caller must be an operator for `sender`.
     * - `recipient` cannot be the zero address.
     * - if `recipient` is a contract, it must implement the {IERC777Recipient}
     * interface.
     */
    function operatorSend(
        address sender,
        address recipient,
        uint256 amount,
        bytes calldata userData,
        bytes calldata operatorData
    ) external override(IERC777);

    /**
     * @dev Destroys `amount` tokens from `account`, reducing the total supply.
     * The caller must be an operator of `account`.
     *
     * If a send hook is registered for `account`, the corresponding function
     * will be called with `userData` and `operatorData`. See {IERC777Sender}.
     *
     * @custom:emits a {Burned} event.
     *
     * @custom:requirements
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     * - the caller must be an operator for `account`.
     */
    function operatorBurn(
        address account,
        uint256 amount,
        bytes calldata userData,
        bytes calldata operatorData
    ) external override(IERC777);

    /**************************************************************************
     * SuperToken custom token functions
     *************************************************************************/

    /**
     * @dev Mint new tokens for the account
     * If `userData` is not empty, the `tokensReceived` hook is invoked according to ERC777 semantics.
     *
     * @custom:modifiers
     *  - onlySelf
     */
    function selfMint(
        address account,
        uint256 amount,
        bytes memory userData
    ) external;

   /**
    * @dev Burn existing tokens for the account
    * If `userData` is not empty, the `tokensToSend` hook is invoked according to ERC777 semantics.
    *
    * @custom:modifiers
    *  - onlySelf
    */
   function selfBurn(
       address account,
       uint256 amount,
       bytes memory userData
   ) external;

   /**
    * @dev Transfer `amount` tokens from the `sender` to `recipient`.
    * If `spender` isn't the same as `sender`, checks if `spender` has allowance to
    * spend tokens of `sender`.
    *
    * @custom:modifiers
    *  - onlySelf
    */
   function selfTransferFrom(
        address sender,
        address spender,
        address recipient,
        uint256 amount
   ) external;

   /**
    * @dev Give `spender`, `amount` allowance to spend the tokens of
    * `account`.
    *
    * @custom:modifiers
    *  - onlySelf
    */
   function selfApproveFor(
        address account,
        address spender,
        uint256 amount
   ) external;

    /**************************************************************************
     * SuperToken extra functions
     *************************************************************************/

    /**
     * @dev Transfer all available balance from `msg.sender` to `recipient`
     */
    function transferAll(address recipient) external;

    /**************************************************************************
     * ERC20 wrapping
     *************************************************************************/

    /**
     * @dev Return the underlying token contract
     * @return tokenAddr Underlying token address
     */
    function getUnderlyingToken() external view returns(address tokenAddr);

    /**
     * @dev Return the underlying token decimals
     * @return underlyingDecimals Underlying token decimals
     */
    function getUnderlyingDecimals() external view returns (uint8 underlyingDecimals);

    /**
     * @dev Return the underlying token conversion rate
     * @param amount Number of tokens to be upgraded (in 18 decimals)
     * @return underlyingAmount The underlying token amount after scaling
     * @return adjustedAmount The super token amount after scaling
     */
    function toUnderlyingAmount(uint256 amount)
        external
        view
        returns (uint256 underlyingAmount, uint256 adjustedAmount);

    /**
     * @dev Upgrade ERC20 to SuperToken.
     * @param amount Number of tokens to be upgraded (in 18 decimals)
     *
     * @custom:note It will use `transferFrom` to get tokens. Before calling this
     * function you should `approve` this contract
     */
    function upgrade(uint256 amount) external;

    /**
     * @dev Upgrade ERC20 to SuperToken and transfer immediately
     * @param to The account to receive upgraded tokens
     * @param amount Number of tokens to be upgraded (in 18 decimals)
     * @param userData User data for the TokensRecipient callback
     *
     * @custom:note It will use `transferFrom` to get tokens. Before calling this
     * function you should `approve` this contract
     *
     * @custom:warning
     * - there is potential of reentrancy IF the "to" account is a registered ERC777 recipient.
     * @custom:requirements
     * - if `userData` is NOT empty AND `to` is a contract, it MUST be a registered ERC777 recipient
     *   otherwise it reverts.
     */
    function upgradeTo(address to, uint256 amount, bytes calldata userData) external;

    /**
     * @dev Token upgrade event
     * @param account Account where tokens are upgraded to
     * @param amount Amount of tokens upgraded (in 18 decimals)
     */
    event TokenUpgraded(
        address indexed account,
        uint256 amount
    );

    /**
     * @dev Downgrade SuperToken to ERC20.
     * @dev It will call transfer to send tokens
     * @param amount Number of tokens to be downgraded
     */
    function downgrade(uint256 amount) external;

    /**
     * @dev Downgrade SuperToken to ERC20 and transfer immediately
     * @param to The account to receive downgraded tokens
     * @param amount Number of tokens to be downgraded (in 18 decimals)
     */
    function downgradeTo(address to, uint256 amount) external;

    /**
     * @dev Token downgrade event
     * @param account Account whose tokens are downgraded
     * @param amount Amount of tokens downgraded
     */
    event TokenDowngraded(
        address indexed account,
        uint256 amount
    );

    /**************************************************************************
    * Batch Operations
    *************************************************************************/

    /**
    * @dev Perform ERC20 approve by host contract.
    * @param account The account owner to be approved.
    * @param spender The spender of account owner's funds.
    * @param amount Number of tokens to be approved.
    *
    * @custom:modifiers
    *  - onlyHost
    */
    function operationApprove(
        address account,
        address spender,
        uint256 amount
    ) external;

    function operationIncreaseAllowance(
        address account,
        address spender,
        uint256 addedValue
    ) external;

    function operationDecreaseAllowance(
        address account,
        address spender,
        uint256 subtractedValue
    ) external;

    /**
    * @dev Perform ERC20 transferFrom by host contract.
    * @param account The account to spend sender's funds.
    * @param spender The account where the funds is sent from.
    * @param recipient The recipient of the funds.
    * @param amount Number of tokens to be transferred.
    *
    * @custom:modifiers
    *  - onlyHost
    */
    function operationTransferFrom(
        address account,
        address spender,
        address recipient,
        uint256 amount
    ) external;

    /**
    * @dev Perform ERC777 send by host contract.
    * @param spender The account where the funds is sent from.
    * @param recipient The recipient of the funds.
    * @param amount Number of tokens to be transferred.
    * @param userData Arbitrary user inputted data
    *
    * @custom:modifiers
    *  - onlyHost
    */
    function operationSend(
        address spender,
        address recipient,
        uint256 amount,
        bytes memory userData
    ) external;

    /**
    * @dev Upgrade ERC20 to SuperToken by host contract.
    * @param account The account to be changed.
    * @param amount Number of tokens to be upgraded (in 18 decimals)
    *
    * @custom:modifiers
    *  - onlyHost
    */
    function operationUpgrade(address account, uint256 amount) external;

    /**
    * @dev Downgrade ERC20 to SuperToken by host contract.
    * @param account The account to be changed.
    * @param amount Number of tokens to be downgraded (in 18 decimals)
    *
    * @custom:modifiers
    *  - onlyHost
    */
    function operationDowngrade(address account, uint256 amount) external;

    // Flow NFT events
    /**
     * @dev Constant Outflow NFT proxy created event
     * @param constantOutflowNFT constant outflow nft address
     */
    event ConstantOutflowNFTCreated(
        IConstantOutflowNFT indexed constantOutflowNFT
    );

    /**
     * @dev Constant Inflow NFT proxy created event
     * @param constantInflowNFT constant inflow nft address
     */
    event ConstantInflowNFTCreated(
        IConstantInflowNFT indexed constantInflowNFT
    );

    /**
     * @dev Pool Admin NFT proxy created event
     * @param poolAdminNFT pool admin nft address
     */
    event PoolAdminNFTCreated(
        IPoolAdminNFT indexed poolAdminNFT
    );

    /**
     * @dev Pool Member NFT proxy created event
     * @param poolMemberNFT pool member nft address
     */
    event PoolMemberNFTCreated(
        IPoolMemberNFT indexed poolMemberNFT
    );

    /**************************************************************************
    * Function modifiers for access control and parameter validations
    *
    * While they cannot be explicitly stated in function definitions, they are
    * listed in function definition comments instead for clarity.
    *
    * NOTE: solidity-coverage not supporting it
    *************************************************************************/

    /// @dev The msg.sender must be the contract itself
    //modifier onlySelf() virtual

}

// SPDX-License-Identifier: MIT
pragma solidity >= 0.8.11;

import { IERC20Metadata } from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";
import { ISuperToken } from "./ISuperToken.sol";
/**
 * @title Super token factory interface
 * @author Superfluid
 */
interface ISuperTokenFactory {

    /**************************************************************************
     * Errors
     *************************************************************************/
    error SUPER_TOKEN_FACTORY_ALREADY_EXISTS();                 // 0x91d67972
    error SUPER_TOKEN_FACTORY_DOES_NOT_EXIST();                 // 0x872cac48
    error SUPER_TOKEN_FACTORY_UNINITIALIZED();                  // 0x1b39b9b4
    error SUPER_TOKEN_FACTORY_ONLY_HOST();                      // 0x478b8e83
    error SUPER_TOKEN_FACTORY_NON_UPGRADEABLE_IS_DEPRECATED();  // 0xc4901a43
    error SUPER_TOKEN_FACTORY_ZERO_ADDRESS();                   // 0x305c9e82

    /**
     * @dev Get superfluid host contract address
     */
    function getHost() external view returns(address host);

    /// @dev Initialize the contract
    function initialize() external;

    /**
     * @notice Get the canonical super token logic.
     */
    function getSuperTokenLogic() external view returns (ISuperToken superToken);

    /**
     * @dev Upgradability modes
     */
    enum Upgradability {
        /// Non upgradable super token, `host.updateSuperTokenLogic` will revert
        NON_UPGRADABLE,
        /// Upgradable through `host.updateSuperTokenLogic` operation
        SEMI_UPGRADABLE,
        /// Always using the latest super token logic
        FULL_UPGRADABLE
    }

    /**
     * @notice Create new super token wrapper for the underlying ERC20 token
     * @param underlyingToken Underlying ERC20 token
     * @param underlyingDecimals Underlying token decimals
     * @param upgradability Upgradability mode
     * @param name Super token name
     * @param symbol Super token symbol
     * @param admin Admin address
     * @return superToken The deployed and initialized wrapper super token
     */
    function createERC20Wrapper(
        IERC20Metadata underlyingToken,
        uint8 underlyingDecimals,
        Upgradability upgradability,
        string calldata name,
        string calldata symbol,
        address admin
    )
        external
        returns (ISuperToken superToken);

    /**
     * @notice Create new super token wrapper for the underlying ERC20 token
     * @param underlyingToken Underlying ERC20 token
     * @param underlyingDecimals Underlying token decimals
     * @param upgradability Upgradability mode
     * @param name Super token name
     * @param symbol Super token symbol
     * @return superToken The deployed and initialized wrapper super token
     */
    function createERC20Wrapper(
        IERC20Metadata underlyingToken,
        uint8 underlyingDecimals,
        Upgradability upgradability,
        string calldata name,
        string calldata symbol
    )
        external
        returns (ISuperToken superToken);

    /**
     * @notice Create new super token wrapper for the underlying ERC20 token
     * @param underlyingToken Underlying ERC20 token
     * @param upgradability Upgradability mode
     * @param name Super token name
     * @param symbol Super token symbol
     * @param admin Admin address
     * @return superToken The deployed and initialized wrapper super token
     */
    function createERC20Wrapper(
        IERC20Metadata underlyingToken,
        Upgradability upgradability,
        string calldata name,
        string calldata symbol,
        address admin
    )
        external
        returns (ISuperToken superToken);

    /**
     * @notice Create new super token wrapper for the underlying ERC20 token with extra token info
     * @param underlyingToken Underlying ERC20 token
     * @param upgradability Upgradability mode
     * @param name Super token name
     * @param symbol Super token symbol
     * @return superToken The deployed and initialized wrapper super token
     * NOTE:
     * - It assumes token provide the .decimals() function
     */
    function createERC20Wrapper(
        IERC20Metadata underlyingToken,
        Upgradability upgradability,
        string calldata name,
        string calldata symbol
    )
        external
        returns (ISuperToken superToken);

    /**
     * @notice Creates a wrapper super token AND sets it in the canonical list OR reverts if it already exists
     * @dev salt for create2 is the keccak256 hash of abi.encode(address(_underlyingToken))
     * @param _underlyingToken Underlying ERC20 token
     * @return ISuperToken the created supertoken
     */
    function createCanonicalERC20Wrapper(IERC20Metadata _underlyingToken)
        external
        returns (ISuperToken);

    /**
     * @notice Computes/Retrieves wrapper super token address given the underlying token address
     * @dev We return from our canonical list if it already exists, otherwise we compute it
     * @dev note that this function only computes addresses for SEMI_UPGRADABLE SuperTokens
     * @param _underlyingToken Underlying ERC20 token address
     * @return superTokenAddress Super token address
     * @return isDeployed whether the super token is deployed AND set in the canonical mapping
     */
    function computeCanonicalERC20WrapperAddress(address _underlyingToken)
        external
        view
        returns (address superTokenAddress, bool isDeployed);

    /**
     * @notice Gets the canonical ERC20 wrapper super token address given the underlying token address
     * @dev We return the address if it exists and the zero address otherwise
     * @param _underlyingTokenAddress Underlying ERC20 token address
     * @return superTokenAddress Super token address
     */
    function getCanonicalERC20Wrapper(address _underlyingTokenAddress)
        external
        view
        returns (address superTokenAddress);

    /**
     * @dev Creates a new custom super token
     * @param customSuperTokenProxy address of the custom supertoken proxy
     */
    function initializeCustomSuperToken(
        address customSuperTokenProxy
    )
        external;

    /**
      * @dev Super token logic created event
      * @param tokenLogic Token logic address
      */
    event SuperTokenLogicCreated(ISuperToken indexed tokenLogic);

    /**
      * @dev Super token created event
      * @param token Newly created super token address
      */
    event SuperTokenCreated(ISuperToken indexed token);

    /**
      * @dev Custom super token created event
      * @param token Newly created custom super token address
      */
    event CustomSuperTokenCreated(ISuperToken indexed token);

}

// SPDX-License-Identifier: MIT
pragma solidity >= 0.8.11;

// ISuperfluid.sol can also be used as an umbrella-import for everything Superfluid, hence we should have these unused
// import.
//
// solhint-disable no-unused-import

/// Global definitions
import {
    SuperAppDefinitions,
    ContextDefinitions,
    FlowOperatorDefinitions,
    BatchOperation,
    SuperfluidGovernanceConfigs
} from "./Definitions.sol";
/// Super token related interfaces:
/// Note: CustomSuperTokenBase is not included for people building CustomSuperToken.
import { IERC20, IERC20Metadata } from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";
import { IERC777 } from "@openzeppelin/contracts/token/ERC777/IERC777.sol";
import { ISuperfluidToken } from "./ISuperfluidToken.sol";
import { ISuperToken } from "./ISuperToken.sol";
import { ISuperTokenFactory } from "./ISuperTokenFactory.sol";
import { ISETH } from "../tokens/ISETH.sol";
/// Superfluid/ERC20x NFTs
import { IFlowNFTBase } from "./IFlowNFTBase.sol";
import { IConstantOutflowNFT } from "./IConstantOutflowNFT.sol";
import { IConstantInflowNFT } from "./IConstantInflowNFT.sol";
import { IPoolAdminNFT } from "../agreements/gdav1/IPoolAdminNFT.sol";
import { IPoolMemberNFT } from "../agreements/gdav1/IPoolMemberNFT.sol";
/// Superfluid agreement interfaces:
import { ISuperAgreement } from "./ISuperAgreement.sol";
import { IConstantFlowAgreementV1 } from "../agreements/IConstantFlowAgreementV1.sol";
import { IInstantDistributionAgreementV1 } from "../agreements/IInstantDistributionAgreementV1.sol";
import { IGeneralDistributionAgreementV1, PoolConfig } from "../agreements/gdav1/IGeneralDistributionAgreementV1.sol";
import { ISuperfluidPool } from "../agreements/gdav1/ISuperfluidPool.sol";
/// Superfluid App interfaces:
import { ISuperApp } from "./ISuperApp.sol";
/// Superfluid governance
import { ISuperfluidGovernance } from "./ISuperfluidGovernance.sol";

/**
 * @title Host interface
 * @author Superfluid
 * @notice This is the central contract of the system where super agreement, super app
 * and super token features are connected.
 *
 * The Superfluid host contract is also the entry point for the protocol users,
 * where batch call and meta transaction are provided for UX improvements.
 *
 */
interface ISuperfluid {

    /**************************************************************************
     * Errors
     *************************************************************************/
    // Superfluid Custom Errors
    error HOST_AGREEMENT_CALLBACK_IS_NOT_ACTION();              // 0xef4295f6
    error HOST_CANNOT_DOWNGRADE_TO_NON_UPGRADEABLE();           // 0x474e7641
    error HOST_CALL_AGREEMENT_WITH_CTX_FROM_WRONG_ADDRESS();    // 0x0cd0ebc2
    error HOST_CALL_APP_ACTION_WITH_CTX_FROM_WRONG_ADDRESS();   // 0x473f7bd4
    error HOST_INVALID_CONFIG_WORD();                           // 0xf4c802a4
    error HOST_MAX_256_AGREEMENTS();                            // 0x7c281a78
    error HOST_NON_UPGRADEABLE();                               // 0x14f72c9f
    error HOST_NON_ZERO_LENGTH_PLACEHOLDER_CTX();               // 0x67e9985b
    error HOST_ONLY_GOVERNANCE();                               // 0xc5d22a4e
    error HOST_UNKNOWN_BATCH_CALL_OPERATION_TYPE();             // 0xb4770115
    error HOST_AGREEMENT_ALREADY_REGISTERED();                  // 0xdc9ddba8
    error HOST_AGREEMENT_IS_NOT_REGISTERED();                   // 0x1c9e9bea
    error HOST_MUST_BE_CONTRACT();                              // 0xd4f6b30c
    error HOST_ONLY_LISTED_AGREEMENT();                         // 0x619c5359
    error HOST_NEED_MORE_GAS();                                 // 0xd4f5d496

    // App Related Custom Errors
    // uses SuperAppDefinitions' App Jail Reasons as _code
    error APP_RULE(uint256 _code);                              // 0xa85ba64f

    error HOST_NOT_A_SUPER_APP();                               // 0x163cbe43
    error HOST_NO_APP_REGISTRATION_PERMISSION();                // 0xb56455f0
    error HOST_RECEIVER_IS_NOT_SUPER_APP();                     // 0x96aa315e
    error HOST_SENDER_IS_NOT_SUPER_APP();                       // 0xbacfdc40
    error HOST_SOURCE_APP_NEEDS_HIGHER_APP_LEVEL();             // 0x44725270
    error HOST_SUPER_APP_IS_JAILED();                           // 0x02384b64
    error HOST_SUPER_APP_ALREADY_REGISTERED();                  // 0x01b0a935

    /**************************************************************************
     * Time
     *
     * > The Oracle: You have the sight now, Neo. You are looking at the world without time.
     * > Neo: Then why can't I see what happens to her?
     * > The Oracle: We can never see past the choices we don't understand.
     * >       - The Oracle and Neo conversing about the future of Trinity and the effects of Neo's choices
     *************************************************************************/

    function getNow() external view returns (uint256);

    /**************************************************************************
     * Governance
     *************************************************************************/

    /**
     * @dev Get the current governance address of the Superfluid host
     */
    function getGovernance() external view returns(ISuperfluidGovernance governance);

    /**
     * @dev Replace the current governance with a new one
     */
    function replaceGovernance(ISuperfluidGovernance newGov) external;
    /**
     * @dev Governance replaced event
     * @param oldGov Address of the old governance contract
     * @param newGov Address of the new governance contract
     */
    event GovernanceReplaced(ISuperfluidGovernance oldGov, ISuperfluidGovernance newGov);

    /**************************************************************************
     * Agreement Whitelisting
     *************************************************************************/

    /**
     * @dev Register a new agreement class to the system
     * @param agreementClassLogic Initial agreement class code
     *
     * @custom:modifiers
     * - onlyGovernance
     */
    function registerAgreementClass(ISuperAgreement agreementClassLogic) external;
    /**
     * @notice Agreement class registered event
     * @dev agreementType is the keccak256 hash of: "org.superfluid-finance.agreements.<AGREEMENT_NAME>.<VERSION>"
     * @param agreementType The agreement type registered
     * @param code Address of the new agreement
     */
    event AgreementClassRegistered(bytes32 agreementType, address code);

    /**
    * @dev Update code of an agreement class
    * @param agreementClassLogic New code for the agreement class
    *
    * @custom:modifiers
    *  - onlyGovernance
    */
    function updateAgreementClass(ISuperAgreement agreementClassLogic) external;
    /**
     * @notice Agreement class updated event
     * @dev agreementType is the keccak256 hash of: "org.superfluid-finance.agreements.<AGREEMENT_NAME>.<VERSION>"
     * @param agreementType The agreement type updated
     * @param code Address of the new agreement
     */
    event AgreementClassUpdated(bytes32 agreementType, address code);

    /**
    * @notice Check if the agreement type is whitelisted
    * @dev agreementType is the keccak256 hash of: "org.superfluid-finance.agreements.<AGREEMENT_NAME>.<VERSION>"
    */
    function isAgreementTypeListed(bytes32 agreementType) external view returns(bool yes);

    /**
    * @dev Check if the agreement class is whitelisted
    */
    function isAgreementClassListed(ISuperAgreement agreementClass) external view returns(bool yes);

    /**
    * @notice Get agreement class
    * @dev agreementType is the keccak256 hash of: "org.superfluid-finance.agreements.<AGREEMENT_NAME>.<VERSION>"
    */
    function getAgreementClass(bytes32 agreementType) external view returns(ISuperAgreement agreementClass);

    /**
    * @dev Map list of the agreement classes using a bitmap
    * @param bitmap Agreement class bitmap
    */
    function mapAgreementClasses(uint256 bitmap)
        external view
        returns (ISuperAgreement[] memory agreementClasses);

    /**
    * @notice Create a new bitmask by adding a agreement class to it
    * @dev agreementType is the keccak256 hash of: "org.superfluid-finance.agreements.<AGREEMENT_NAME>.<VERSION>"
    * @param bitmap Agreement class bitmap
    */
    function addToAgreementClassesBitmap(uint256 bitmap, bytes32 agreementType)
        external view
        returns (uint256 newBitmap);

    /**
    * @notice Create a new bitmask by removing a agreement class from it
    * @dev agreementType is the keccak256 hash of: "org.superfluid-finance.agreements.<AGREEMENT_NAME>.<VERSION>"
    * @param bitmap Agreement class bitmap
    */
    function removeFromAgreementClassesBitmap(uint256 bitmap, bytes32 agreementType)
        external view
        returns (uint256 newBitmap);

    /**************************************************************************
    * Super Token Factory
    **************************************************************************/

    /**
     * @dev Get the super token factory
     * @return factory The factory
     */
    function getSuperTokenFactory() external view returns (ISuperTokenFactory factory);

    /**
     * @dev Get the super token factory logic (applicable to upgradable deployment)
     * @return logic The factory logic
     */
    function getSuperTokenFactoryLogic() external view returns (address logic);

    /**
     * @dev Update super token factory
     * @param newFactory New factory logic
     */
    function updateSuperTokenFactory(ISuperTokenFactory newFactory) external;
    /**
     * @dev SuperToken factory updated event
     * @param newFactory Address of the new factory
     */
    event SuperTokenFactoryUpdated(ISuperTokenFactory newFactory);

    /**
     * @notice Update the super token logic to the latest (canonical) implementation
     * if `newLogicOverride` is zero, or to `newLogicOverride` otherwise.
     * or to the provided implementation `.
     * @dev Refer to ISuperTokenFactory.Upgradability for expected behaviours
     */
    function updateSuperTokenLogic(ISuperToken token, address newLogicOverride) external;
    /**
     * @notice Update the super token logic to the provided one
     * @dev newLogic must implement UUPSProxiable with matching proxiableUUID
     */
    event SuperTokenLogicUpdated(ISuperToken indexed token, address code);

    /**
     * @notice Change the SuperToken admin address
     * @dev The admin is the only account allowed to update the token logic
     * For backward compatibility, the "host" is the default "admin" if unset (address(0)).
     */
    function changeSuperTokenAdmin(ISuperToken token, address newAdmin) external;

    /**
     * @notice Change the implementation address the pool beacon points to
     * @dev Updating the logic the beacon points to will update the logic of all the Pool BeaconProxy instances
     */
    function updatePoolBeaconLogic(address newBeaconLogic) external;

    /**
     * @dev Pool Beacon logic updated event
     * @param beaconProxy addrss of the beacon proxy
     * @param newBeaconLogic address of the new beacon logic
     */
    event PoolBeaconLogicUpdated(address indexed beaconProxy, address newBeaconLogic);

    /**************************************************************************
     * App Registry
     *************************************************************************/

    /**
     * @dev Message sender (must be a contract) registers itself as a super app.
     * @param configWord The super app manifest configuration, flags are defined in
     * `SuperAppDefinitions`
     * @notice On some mainnet deployments, pre-authorization by governance may be needed for this to succeed.
     * See https://github.com/superfluid-finance/protocol-monorepo/wiki/Super-App-White-listing-Guide
     */
    function registerApp(uint256 configWord) external;

    /**
     * @dev Registers an app (must be a contract) as a super app.
     * @param app The super app address
     * @param configWord The super app manifest configuration, flags are defined in
     * `SuperAppDefinitions`
     * @notice On some mainnet deployments, pre-authorization by governance may be needed for this to succeed.
     * See https://github.com/superfluid-finance/protocol-monorepo/wiki/Super-App-White-listing-Guide
     */
    function registerApp(ISuperApp app, uint256 configWord) external;

    /**
     * @dev App registered event
     * @param app Address of jailed app
     */
    event AppRegistered(ISuperApp indexed app);

    /**
     * @dev DO NOT USE for new deployments
     * @custom:deprecated you should use `registerApp(uint256 configWord) instead.
     */
    function registerAppWithKey(uint256 configWord, string calldata registrationKey) external;

    /**
     * @dev DO NOT USE for new deployments
     * @custom:deprecated you should use `registerApp(ISuperApp app, uint256 configWord) instead.
     */
    function registerAppByFactory(ISuperApp app, uint256 configWord) external;

    /**
     * @dev Query if the app is registered
     * @param app Super app address
     */
    function isApp(ISuperApp app) external view returns(bool);

    /**
     * @dev Query app callbacklevel
     * @param app Super app address
     */
    function getAppCallbackLevel(ISuperApp app) external view returns(uint8 appCallbackLevel);

    /**
     * @dev Get the manifest of the super app
     * @param app Super app address
     */
    function getAppManifest(
        ISuperApp app
    )
        external view
        returns (
            bool isSuperApp,
            bool isJailed,
            uint256 noopMask
        );

    /**
     * @dev Query if the app has been jailed
     * @param app Super app address
     */
    function isAppJailed(ISuperApp app) external view returns (bool isJail);

    /**
     * @dev Whitelist the target app for app composition for the source app (msg.sender)
     * @param targetApp The target super app address
     */
    function allowCompositeApp(ISuperApp targetApp) external;

    /**
     * @dev Query if source app is allowed to call the target app as downstream app
     * @param app Super app address
     * @param targetApp The target super app address
     */
    function isCompositeAppAllowed(
        ISuperApp app,
        ISuperApp targetApp
    )
        external view
        returns (bool isAppAllowed);

    /**************************************************************************
     * Agreement Framework
     *
     * Agreements use these function to trigger super app callbacks, updates
     * app credit and charge gas fees.
     *
     * These functions can only be called by registered agreements.
     *************************************************************************/

    /**
     * @dev (For agreements) StaticCall the app before callback
     * @param  app               The super app.
     * @param  callData          The call data sending to the super app.
     * @param  isTermination     Is it a termination callback?
     * @param  ctx               Current ctx, it will be validated.
     * @return cbdata            Data returned from the callback.
     */
    function callAppBeforeCallback(
        ISuperApp app,
        bytes calldata callData,
        bool isTermination,
        bytes calldata ctx
    )
        external
        // onlyAgreement
        // assertValidCtx(ctx)
        returns(bytes memory cbdata);

    /**
     * @dev (For agreements) Call the app after callback
     * @param  app               The super app.
     * @param  callData          The call data sending to the super app.
     * @param  isTermination     Is it a termination callback?
     * @param  ctx               Current ctx, it will be validated.
     * @return newCtx            The current context of the transaction.
     */
    function callAppAfterCallback(
        ISuperApp app,
        bytes calldata callData,
        bool isTermination,
        bytes calldata ctx
    )
        external
        // onlyAgreement
        // assertValidCtx(ctx)
        returns(bytes memory newCtx);

    /**
     * @dev (For agreements) Create a new callback stack
     * @param  ctx                     The current ctx, it will be validated.
     * @param  app                     The super app.
     * @param  appCreditGranted        App credit granted so far.
     * @param  appCreditUsed           App credit used so far.
     * @return newCtx                  The current context of the transaction.
     */
    function appCallbackPush(
        bytes calldata ctx,
        ISuperApp app,
        uint256 appCreditGranted,
        int256 appCreditUsed,
        ISuperfluidToken appCreditToken
    )
        external
        // onlyAgreement
        // assertValidCtx(ctx)
        returns (bytes memory newCtx);

    /**
     * @dev (For agreements) Pop from the current app callback stack
     * @param  ctx                     The ctx that was pushed before the callback stack.
     * @param  appCreditUsedDelta      App credit used by the app.
     * @return newCtx                  The current context of the transaction.
     *
     * @custom:security
     * - Here we cannot do assertValidCtx(ctx), since we do not really save the stack in memory.
     * - Hence there is still implicit trust that the agreement handles the callback push/pop pair correctly.
     */
    function appCallbackPop(
        bytes calldata ctx,
        int256 appCreditUsedDelta
    )
        external
        // onlyAgreement
        returns (bytes memory newCtx);

    /**
     * @dev (For agreements) Use app credit.
     * @param  ctx                      The current ctx, it will be validated.
     * @param  appCreditUsedMore        See app credit for more details.
     * @return newCtx                   The current context of the transaction.
     */
    function ctxUseCredit(
        bytes calldata ctx,
        int256 appCreditUsedMore
    )
        external
        // onlyAgreement
        // assertValidCtx(ctx)
        returns (bytes memory newCtx);

    /**
     * @dev (For agreements) Jail the app.
     * @param  app                     The super app.
     * @param  reason                  Jail reason code.
     * @return newCtx                  The current context of the transaction.
     */
    function jailApp(
        bytes calldata ctx,
        ISuperApp app,
        uint256 reason
    )
        external
        // onlyAgreement
        // assertValidCtx(ctx)
        returns (bytes memory newCtx);

    /**
     * @dev Jail event for the app
     * @param app Address of jailed app
     * @param reason Reason the app is jailed (see Definitions.sol for the full list)
     */
    event Jail(ISuperApp indexed app, uint256 reason);

    /**************************************************************************
     * Contextless Call Proxies
     *
     * NOTE: For EOAs or non-app contracts, they are the entry points for interacting
     * with agreements or apps.
     *
     * NOTE: The contextual call data should be generated using
     * abi.encodeWithSelector. The context parameter should be set to "0x",
     * an empty bytes array as a placeholder to be replaced by the host
     * contract.
     *************************************************************************/

     /**
      * @dev Call agreement function
      * @param agreementClass The agreement address you are calling
      * @param callData The contextual call data with placeholder ctx
      * @param userData Extra user data being sent to the super app callbacks
      */
     function callAgreement(
         ISuperAgreement agreementClass,
         bytes calldata callData,
         bytes calldata userData
     )
        external
        //cleanCtx
        //isAgreement(agreementClass)
        returns(bytes memory returnedData);

    /**
     * @notice Call app action
     * @dev Main use case is calling app action in a batch call via the host
     * @param callData The contextual call data
     *
     * @custom:note See "Contextless Call Proxies" above for more about contextual call data.
     */
    function callAppAction(
        ISuperApp app,
        bytes calldata callData
    )
        external
        //cleanCtx
        //isAppActive(app)
        //isValidAppAction(callData)
        returns(bytes memory returnedData);

    /**************************************************************************
     * Contextual Call Proxies and Context Utilities
     *
     * For apps, they must use context they receive to interact with
     * agreements or apps.
     *
     * The context changes must be saved and returned by the apps in their
     * callbacks always, any modification to the context will be detected and
     * the violating app will be jailed.
     *************************************************************************/

    /**
     * @dev Context Struct
     *
     * @custom:note on backward compatibility:
     * - Non-dynamic fields are padded to 32bytes and packed
     * - Dynamic fields are referenced through a 32bytes offset to their "parents" field (or root)
     * - The order of the fields hence should not be rearranged in order to be backward compatible:
     *    - non-dynamic fields will be parsed at the same memory location,
     *    - and dynamic fields will simply have a greater offset than it was.
     * - We cannot change the structure of the Context struct because of ABI compatibility requirements
     */
    struct Context {
        //
        // Call context
        //
        // app callback level
        uint8 appCallbackLevel;
        // type of call
        uint8 callType;
        // the system timestamp
        uint256 timestamp;
        // The intended message sender for the call
        address msgSender;

        //
        // Callback context
        //
        // For callbacks it is used to know which agreement function selector is called
        bytes4 agreementSelector;
        // User provided data for app callbacks
        bytes userData;

        //
        // App context
        //
        // app credit granted
        uint256 appCreditGranted;
        // app credit wanted by the app callback
        uint256 appCreditWantedDeprecated;
        // app credit used, allowing negative values over a callback session
        // the appCreditUsed value over a callback sessions is calculated with:
        // existing flow data owed deposit + sum of the callback agreements
        // deposit deltas
        // the final value used to modify the state is determined by the
        // _adjustNewAppCreditUsed function (in AgreementLibrary.sol) which takes
        // the appCreditUsed value reached in the callback session and the app
        // credit granted
        int256 appCreditUsed;
        // app address
        address appAddress;
        // app credit in super token
        ISuperfluidToken appCreditToken;
    }

    function callAgreementWithContext(
        ISuperAgreement agreementClass,
        bytes calldata callData,
        bytes calldata userData,
        bytes calldata ctx
    )
        external
        // requireValidCtx(ctx)
        // onlyAgreement(agreementClass)
        returns (bytes memory newCtx, bytes memory returnedData);

    function callAppActionWithContext(
        ISuperApp app,
        bytes calldata callData,
        bytes calldata ctx
    )
        external
        // requireValidCtx(ctx)
        // isAppActive(app)
        returns (bytes memory newCtx);

    function decodeCtx(bytes memory ctx)
        external pure
        returns (Context memory context);

    function isCtxValid(bytes calldata ctx) external view returns (bool);

    /**************************************************************************
    * Batch call
    **************************************************************************/
    /**
     * @dev Batch operation data
     */
    struct Operation {
        // Operation type. Defined in BatchOperation (Definitions.sol)
        uint32 operationType;
        // Operation target
        address target;
        // Data specific to the operation
        bytes data;
    }

    /**
     * @dev Batch call function
     * @param operations Array of batch operations
     */
    function batchCall(Operation[] calldata operations) external payable;

    /**
     * @dev Batch call function for trusted forwarders (EIP-2771)
     * @param operations Array of batch operations
     */
    function forwardBatchCall(Operation[] calldata operations) external;

    /**************************************************************************
     * Function modifiers for access control and parameter validations
     *
     * While they cannot be explicitly stated in function definitions, they are
     * listed in function definition comments instead for clarity.
     *
     * TODO: turning these off because solidity-coverage doesn't like it
     *************************************************************************/

     /* /// @dev The current superfluid context is clean.
     modifier cleanCtx() virtual;

     /// @dev Require the ctx being valid.
     modifier requireValidCtx(bytes memory ctx) virtual;

     /// @dev Assert the ctx being valid.
     modifier assertValidCtx(bytes memory ctx) virtual;

     /// @dev The agreement is a listed agreement.
     modifier isAgreement(ISuperAgreement agreementClass) virtual;

     // onlyGovernance

     /// @dev The msg.sender must be a listed agreement.
     modifier onlyAgreement() virtual;

     /// @dev The app is registered and not jailed.
     modifier isAppActive(ISuperApp app) virtual; */
}