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// SPDX-License-Identifier: AGPLv3
pragma solidity ^0.8.23;

// solhint-disable max-states-count
// Notes: SuperToken is rich with states, disable this default rule here.

import { UUPSProxiable } from "../upgradability/UUPSProxiable.sol";
import {
    ISuperfluid,
    ISuperToken,
    IERC20,
    IPoolAdminNFT,
    IPoolMemberNFT
} from "../interfaces/superfluid/ISuperfluid.sol";
import { SuperfluidToken } from "./SuperfluidToken.sol";
import { ERC777Helper } from "../libs/ERC777Helper.sol";
import { SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import { SafeMath } from "@openzeppelin/contracts/utils/math/SafeMath.sol";
import { SafeCast } from "@openzeppelin/contracts/utils/math/SafeCast.sol";
import { IERC777Recipient } from "@openzeppelin/contracts/token/ERC777/IERC777Recipient.sol";
import { IERC777Sender } from "@openzeppelin/contracts/token/ERC777/IERC777Sender.sol";
import { Address } from "@openzeppelin/contracts/utils/Address.sol";

// placeholder types needed as an intermediate step before complete removal of FlowNFTs
// solhint-disable-next-line no-empty-blocks
interface IConstantOutflowNFT {}
// solhint-disable-next-line no-empty-blocks
interface IConstantInflowNFT {}

/**
 * @title Superfluid's super token implementation
 *
 * @author Superfluid
 */
contract SuperToken is
    UUPSProxiable,
    SuperfluidToken,
    ISuperToken
{

    using SafeMath for uint256;
    using SafeCast for uint256;
    using Address for address;
    using ERC777Helper for ERC777Helper.Operators;
    using SafeERC20 for IERC20;

    // See: https://eips.ethereum.org/EIPS/eip-1967#admin-address
    bytes32 constant private _ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;

    uint8 constant private _STANDARD_DECIMALS = 18;

    // solhint-disable-next-line var-name-mixedcase
    IConstantOutflowNFT immutable public CONSTANT_OUTFLOW_NFT;

    // solhint-disable-next-line var-name-mixedcase
    IConstantInflowNFT immutable public CONSTANT_INFLOW_NFT;

    // solhint-disable-next-line var-name-mixedcase
    IPoolMemberNFT immutable public POOL_MEMBER_NFT;

    // solhint-disable-next-line var-name-mixedcase
    IPoolAdminNFT immutable public POOL_ADMIN_NFT;

    /* WARNING: NEVER RE-ORDER VARIABLES! Including the base contracts.
       Always double-check that new
       variables are added APPEND-ONLY. Re-ordering variables can
       permanently BREAK the deployed proxy contract. */

    /// @dev The underlying ERC20 token
    IERC20 internal _underlyingToken;

    /// @dev Decimals of the underlying token
    uint8 internal _underlyingDecimals;

    /// @dev IERC20Metadata Name property
    string internal _name;

    /// @dev IERC20Metadata Symbol property
    string internal _symbol;

    /// @dev ERC20 Allowances Storage
    mapping(address => mapping (address => uint256)) internal _allowances;

    /// @dev ERC777 operators support data
    ERC777Helper.Operators internal _operators;

    // NOTE: for future compatibility, these are reserved solidity slots
    // The sub-class of SuperToken solidity slot will start after _reserve22

    // NOTE: Whenever modifying the storage layout here it is important to update the validateStorageLayout
    // function in its respective mock contract to ensure that it doesn't break anything or lead to unexpected
    // behaviors/layout when upgrading

    uint256 internal _reserve22;
    uint256 private _reserve23;
    uint256 private _reserve24;
    uint256 private _reserve25;
    uint256 private _reserve26;
    uint256 private _reserve27;
    uint256 private _reserve28;
    uint256 private _reserve29;
    uint256 private _reserve30;
    uint256 internal _reserve31;

    // NOTE: You cannot add more storage here. Refer to CustomSuperTokenBase.sol
    // to see the hard-coded storage padding used by SETH and PureSuperToken

    constructor(
        ISuperfluid host,
        IConstantOutflowNFT constantOutflowNFT,
        IConstantInflowNFT constantInflowNFT,
        IPoolAdminNFT poolAdminNFT,
        IPoolMemberNFT poolMemberNFT
    )
        SuperfluidToken(host)
        // solhint-disable-next-line no-empty-blocks
    {
        // @note This constructor is only run for the initial
        // deployment of the logic contract.

        // set the immutable canonical NFT proxy addresses
        CONSTANT_OUTFLOW_NFT = constantOutflowNFT;
        CONSTANT_INFLOW_NFT = constantInflowNFT;

        POOL_ADMIN_NFT = poolAdminNFT;
        POOL_MEMBER_NFT = poolMemberNFT;

        emit PoolAdminNFTCreated(poolAdminNFT);
        emit PoolMemberNFTCreated(poolMemberNFT);
    }

    /// @dev Initialize the Super Token proxy
    function initialize(
        IERC20 underlyingToken,
        uint8 underlyingDecimals,
        string calldata n,
        string calldata s
    )
        external
        virtual
        override
        initializer // OpenZeppelin Initializable
    {
        // @note This function is only run once during the initial
        // deployment of the proxy contract.

        // initialize the Super Token
        _initialize(underlyingToken, underlyingDecimals, n, s, address(0));
    }

    /// @dev Initialize the Super Token proxy with an admin
    function initializeWithAdmin(
        IERC20 underlyingToken,
        uint8 underlyingDecimals,
        string calldata n,
        string calldata s,
        address admin
    )
        external
        virtual
        override
        initializer // OpenZeppelin Initializable
    {
        // @note This function is only run once during the initial
        // deployment of the proxy contract.

        // initialize the Super Token
        _initialize(underlyingToken, underlyingDecimals, n, s, admin);
    }

    function proxiableUUID() public pure virtual override returns (bytes32) {
        return keccak256("org.superfluid-finance.contracts.SuperToken.implementation");
    }

    /**
     * @notice Updates the logic contract the proxy is pointing at
     * @dev Only the admin can call this function (host if admin == address(0))
     * @param newAddress Address of the new logic contract
     */
    function updateCode(address newAddress) external virtual override onlyAdmin {
        UUPSProxiable._updateCodeAddress(newAddress);
    }

    function changeAdmin(address newAdmin) external override onlyAdmin {
        address oldAdmin = _getAdmin();
        _setAdmin(newAdmin);

        emit AdminChanged(oldAdmin, newAdmin);
    }

    function getAdmin() external view override returns (address) {
        return _getAdmin();
    }

    function _getAdmin() internal view returns (address admin) {
        assembly {
            // solium-disable-line
            admin := sload(_ADMIN_SLOT)
        }
    }

    function _setAdmin(address newAdmin) internal {
        assembly {
            // solium-disable-line
            sstore(_ADMIN_SLOT, newAdmin)
        }
    }


    /**************************************************************************
     * ERC20 Token Info
     *************************************************************************/

    function name() external view virtual override returns (string memory) {
        return _name;
    }

    function symbol() external view virtual override returns (string memory) {
        return _symbol;
    }

    function decimals() external pure virtual override returns (uint8) {
        return _STANDARD_DECIMALS;
    }

    /**************************************************************************
     * (private) Token Logics
     *************************************************************************/

    function _initialize(
        IERC20 underlyingToken,
        uint8 underlyingDecimals,
        string calldata n,
        string calldata s,
        address admin
    ) internal {
        _underlyingToken = underlyingToken;
        _underlyingDecimals = underlyingDecimals;

        _name = n;
        _symbol = s;

        _setAdmin(admin);

        // register interfaces
        ERC777Helper.register(address(this));

        // help tools like explorers detect the token contract
        emit Transfer(address(0), address(0), 0);

        // previous admin will always be the zero address in an uninitialized contract
        emit AdminChanged(address(0), admin);
    }

    /**
     * @notice in the original openzeppelin implementation, transfer() and transferFrom()
     * did invoke the send and receive hooks, as required by ERC777.
     * This hooks were removed from super tokens for ERC20 transfers in order to protect
     * interfacing contracts which don't expect invocations of ERC20 transfers to potentially reenter.
     * Interactions relying on ERC777 hooks need to use the ERC777 interface.
     * For more context, see https://github.com/superfluid-finance/protocol-monorepo/wiki/About-ERC-777
     */
    function _transferFrom(address spender, address holder, address recipient, uint amount)
        internal returns (bool)
    {
        if (holder == address(0)) {
            revert SUPER_TOKEN_TRANSFER_FROM_ZERO_ADDRESS();
        }
        if (recipient == address(0)) {
            revert SUPER_TOKEN_TRANSFER_TO_ZERO_ADDRESS();
        }
        address operator = msg.sender;

        _move(operator, holder, recipient, amount, "", "");

        if (spender != holder) {
            _approve(
                holder,
                spender,
                _allowances[holder][spender].sub(amount, "SuperToken: transfer amount exceeds allowance"));
        }

        return true;
    }

    /**
     * @dev Send tokens
     * @param operator address operator address
     * @param from address token holder address
     * @param to address recipient address
     * @param amount uint256 amount of tokens to transfer
     * @param userData bytes extra information provided by the token holder (if any)
     * @param operatorData bytes extra information provided by the operator (if any)
     * @param requireReceptionAck if true, contract recipients are required to implement ERC777TokensRecipient
     */
    function _send(
        address operator,
        address from,
        address to,
        uint256 amount,
        bytes memory userData,
        bytes memory operatorData,
        bool requireReceptionAck
    )
        internal
    {
        if (from == address(0)) {
            revert SUPER_TOKEN_TRANSFER_FROM_ZERO_ADDRESS();
        }
        if (to == address(0)) {
            revert SUPER_TOKEN_TRANSFER_TO_ZERO_ADDRESS();
        }

        _callTokensToSend(operator, from, to, amount, userData, operatorData);

        _move(operator, from, to, amount, userData, operatorData);

        _callTokensReceived(operator, from, to, amount, userData, operatorData, requireReceptionAck);
    }

    function _move(
        address operator,
        address from,
        address to,
        uint256 amount,
        bytes memory userData,
        bytes memory operatorData
    )
        private
    {
        SuperfluidToken._move(from, to, amount.toInt256());

        emit Sent(operator, from, to, amount, userData, operatorData);
        emit Transfer(from, to, amount);
    }

    /**
     * @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * If invokeHook is true and a send hook is registered for `account`,
     * the corresponding function will be called with `operator`, `userData` and `operatorData`.
     *
     * See {IERC777Sender} and {IERC777Recipient}.
     *
     * Emits {Minted} and {IERC20.Transfer} events.
     *
     * Requirements
     *
     * - `account` cannot be the zero address.
     * - if `invokeHook` and `requireReceptionAck` are set and `account` is a contract,
     *   it must implement the {IERC777Recipient}
     * interface.
     */
    function _mint(
        address operator,
        address account,
        uint256 amount,
        bool invokeHook,
        bool requireReceptionAck,
        bytes memory userData,
        bytes memory operatorData
    )
        internal
    {
        if (account == address(0)) {
            revert SUPER_TOKEN_MINT_TO_ZERO_ADDRESS();
        }

        SuperfluidToken._mint(account, amount);

        if (invokeHook) {
            _callTokensReceived(operator, address(0), account, amount, userData, operatorData, requireReceptionAck);
        }

        emit Minted(operator, account, amount, userData, operatorData);
        emit Transfer(address(0), account, amount);
    }

    /**
     * @dev Burn tokens
     * @param from address token holder address
     * @param amount uint256 amount of tokens to burn
     * @param userData bytes extra information provided by the token holder
     * @param operatorData bytes extra information provided by the operator (if any)
     */
    function _burn(
        address operator,
        address from,
        uint256 amount,
        bool invokeHook,
        bytes memory userData,
        bytes memory operatorData
    )
        internal
    {
        if (from == address(0)) {
            revert SUPER_TOKEN_BURN_FROM_ZERO_ADDRESS();
        }

        if (invokeHook) {
            _callTokensToSend(operator, from, address(0), amount, userData, operatorData);
        }

        SuperfluidToken._burn(from, amount);

        emit Burned(operator, from, amount, userData, operatorData);
        emit Transfer(from, address(0), amount);
    }

    /**
     * @notice Sets `amount` as the allowance of `spender` over the `account`s tokens.
     *
     * This is internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(address account, address spender, uint256 amount)
        internal
    {
        if (account == address(0)) {
            revert SUPER_TOKEN_APPROVE_FROM_ZERO_ADDRESS();
        }
        if (spender == address(0)) {
            revert SUPER_TOKEN_APPROVE_TO_ZERO_ADDRESS();
        }

        _allowances[account][spender] = amount;
        emit Approval(account, spender, amount);
    }

    /**
     * @dev Call from.tokensToSend() if the interface is registered
     * @param operator address operator requesting the transfer
     * @param from address token holder address
     * @param to address recipient address
     * @param amount uint256 amount of tokens to transfer
     * @param userData bytes extra information provided by the token holder (if any)
     * @param operatorData bytes extra information provided by the operator (if any)
     */
    function _callTokensToSend(
        address operator,
        address from,
        address to,
        uint256 amount,
        bytes memory userData,
        bytes memory operatorData
    )
        private
    {
        address implementer = ERC777Helper._ERC1820_REGISTRY.getInterfaceImplementer(
            from, ERC777Helper._TOKENS_SENDER_INTERFACE_HASH);
        if (implementer != address(0)) {
            IERC777Sender(implementer).tokensToSend(operator, from, to, amount, userData, operatorData);
        }
    }

    /**
     * @dev Call to.tokensReceived() if the interface is registered. Reverts if the recipient is a contract but
     * tokensReceived() was not registered for the recipient
     * @param operator address operator requesting the transfer
     * @param from address token holder address
     * @param to address recipient address
     * @param amount uint256 amount of tokens to transfer
     * @param userData bytes extra information provided by the token holder (if any)
     * @param operatorData bytes extra information provided by the operator (if any)
     * @param requireReceptionAck if true, contract recipients are required to implement ERC777TokensRecipient
     */
    function _callTokensReceived(
        address operator,
        address from,
        address to,
        uint256 amount,
        bytes memory userData,
        bytes memory operatorData,
        bool requireReceptionAck
    )
        private
    {
        address implementer = ERC777Helper._ERC1820_REGISTRY.getInterfaceImplementer(
            to, ERC777Helper._TOKENS_RECIPIENT_INTERFACE_HASH);
        if (implementer != address(0)) {
            IERC777Recipient(implementer).tokensReceived(operator, from, to, amount, userData, operatorData);
        } else if (requireReceptionAck) {
            if (to.isContract()) revert SUPER_TOKEN_NOT_ERC777_TOKENS_RECIPIENT();
        }
    }

    /**************************************************************************
     * ERC20 Implementations
     *************************************************************************/

    function totalSupply()
        public view virtual override returns (uint256)
    {
        return _totalSupply;
    }

    function balanceOf(
        address account
    )
        public
        view
        virtual
        override
        returns(uint256 balance)
    {
        // solhint-disable-next-line not-rely-on-time
        (int256 availableBalance, , ,) = super.realtimeBalanceOfNow(account);
        return availableBalance < 0 ? 0 : uint256(availableBalance);
    }

    function transfer(address recipient, uint256 amount)
        public virtual override returns (bool)
    {
        return _transferFrom(msg.sender, msg.sender, recipient, amount);
    }

    function allowance(address account, address spender)
        public view virtual override returns (uint256)
    {
        return _allowances[account][spender];
    }

    function approve(address spender, uint256 amount)
        public virtual override
        returns (bool)
    {
        _approve(msg.sender, spender, amount);
        return true;
    }

    function transferFrom(address holder, address recipient, uint256 amount)
        public virtual override returns (bool)
    {
        return _transferFrom(msg.sender, holder, recipient, amount);
    }

    function increaseAllowance(address spender, uint256 addedValue)
        public virtual override returns (bool) {
        _approve(msg.sender, spender, _allowances[msg.sender][spender] + addedValue);
        return true;
    }

    function decreaseAllowance(address spender, uint256 subtractedValue)
        public virtual override returns (bool) {
        _approve(msg.sender, spender, _allowances[msg.sender][spender].sub(subtractedValue,
            "SuperToken: decreased allowance below zero"));
        return true;
    }

    /**************************************************************************
     * ERC-777 functions
     *************************************************************************/

    function granularity() external pure virtual override returns (uint256) { return 1; }

    function send(address recipient, uint256 amount, bytes calldata userData) external virtual override {
        _send(msg.sender, msg.sender, recipient, amount, userData, "", true);
    }

    function burn(uint256 amount, bytes calldata userData) external virtual override {
        _downgrade(msg.sender, msg.sender, msg.sender, amount, userData, "");
    }

    function isOperatorFor(address operator, address tokenHolder) external virtual override view returns (bool) {
        return _operators.isOperatorFor(operator, tokenHolder);
    }

    function authorizeOperator(address operator) external virtual override {
        address holder = msg.sender;
        _operators.authorizeOperator(holder, operator);
        emit AuthorizedOperator(operator, holder);
    }

    function revokeOperator(address operator) external virtual override {
        address holder = msg.sender;
        _operators.revokeOperator(holder, operator);
        emit RevokedOperator(operator, holder);
    }

    function defaultOperators() external virtual override view returns (address[] memory) {
        return ERC777Helper.defaultOperators(_operators);
    }

    function operatorSend(
        address sender,
        address recipient,
        uint256 amount,
        bytes calldata userData,
        bytes calldata operatorData
    ) external virtual override {
        address operator = msg.sender;
        if (!_operators.isOperatorFor(operator, sender)) revert SUPER_TOKEN_CALLER_IS_NOT_OPERATOR_FOR_HOLDER();
        _send(operator, sender, recipient, amount, userData, operatorData, true);
    }

    function operatorBurn(
        address account,
        uint256 amount,
        bytes calldata userData,
        bytes calldata operatorData
    ) external virtual override {
        address operator = msg.sender;
        if (!_operators.isOperatorFor(operator, account)) revert SUPER_TOKEN_CALLER_IS_NOT_OPERATOR_FOR_HOLDER();
        _downgrade(operator, account, account, amount, userData, operatorData);
    }

    function _setupDefaultOperators(address[] memory operators) internal {
        _operators.setupDefaultOperators(operators);
    }

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

    function selfMint(
        address account,
        uint256 amount,
        bytes memory userData
    )
        external virtual override
        onlySelf
    {
        _mint(msg.sender, account, amount, userData.length != 0 /* invokeHook */,
            userData.length != 0 /* requireReceptionAck */, userData, new bytes(0));
    }

    function selfBurn(
       address account,
       uint256 amount,
       bytes memory userData
    )
       external virtual override
       onlySelf
    {
       _burn(msg.sender, account, amount, userData.length != 0 /* invokeHook */, userData, new bytes(0));
    }

    function selfApproveFor(
        address account,
        address spender,
        uint256 amount
    )
        external virtual override
        onlySelf
    {
        _approve(account, spender, amount);
    }

    function selfTransferFrom(
        address holder,
        address spender,
        address recipient,
        uint256 amount
    )
        external virtual override
        onlySelf
    {
        _transferFrom(spender, holder, recipient, amount);
    }

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

    function transferAll(address recipient)
        external virtual override
    {
        _transferFrom(msg.sender, msg.sender, recipient, balanceOf(msg.sender));
    }

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

    /// @inheritdoc ISuperToken
    function getUnderlyingToken() external view virtual override returns(address) {
        return address(_underlyingToken);
    }

    /// @inheritdoc ISuperToken
    function getUnderlyingDecimals() external view virtual override returns (uint8) {
        return _underlyingDecimals;
    }

    /// @inheritdoc ISuperToken
    function toUnderlyingAmount(uint256 amount)
        external
        view
        virtual
        override
        returns (uint256 underlyingAmount, uint256 adjustedAmount)
    {
        return _toUnderlyingAmount(amount);
    }

    /// @inheritdoc ISuperToken
    function upgrade(uint256 amount) external virtual override {
        _upgrade(msg.sender, msg.sender, msg.sender, amount, "", "");
    }

    /// @inheritdoc ISuperToken
    function upgradeTo(address to, uint256 amount, bytes calldata userData) external virtual override {
        _upgrade(msg.sender, msg.sender, to, amount, userData, "");
    }

    /// @inheritdoc ISuperToken
    function downgrade(uint256 amount) external virtual override {
        _downgrade(msg.sender, msg.sender, msg.sender, amount, "", "");
    }

    /// @inheritdoc ISuperToken
    function downgradeTo(address to, uint256 amount) external virtual override {
        _downgrade(msg.sender, msg.sender, to, amount, "", "");
    }

    function _upgrade(
        address operator,
        address account,
        address to,
        uint256 amount,
        bytes memory userData,
        bytes memory operatorData
    ) internal {
        if (address(_underlyingToken) == address(0)) revert SUPER_TOKEN_NO_UNDERLYING_TOKEN();

        (uint256 underlyingAmount, uint256 adjustedAmount) = _toUnderlyingAmount(amount);

        uint256 amountBefore = _underlyingToken.balanceOf(address(this));
        _underlyingToken.safeTransferFrom(account, address(this), underlyingAmount);
        uint256 amountAfter = _underlyingToken.balanceOf(address(this));
        uint256 actualUpgradedAmount = amountAfter - amountBefore;
        if (underlyingAmount != actualUpgradedAmount) revert SUPER_TOKEN_INFLATIONARY_DEFLATIONARY_NOT_SUPPORTED();

        _mint(operator, to, adjustedAmount,
            // if `userData.length` is greater than 0, we set invokeHook and requireReceptionAck true
            userData.length != 0, userData.length != 0, userData, operatorData);

        emit TokenUpgraded(to, adjustedAmount);
    }

    function _downgrade(
        address operator, // the account executing the transaction
        address account,  // the account whose super tokens we are burning
        address to,       // the account receiving the underlying tokens
        uint256 amount,
        bytes memory userData,
        bytes memory operatorData
    ) internal {
        if (address(_underlyingToken) == address(0)) revert SUPER_TOKEN_NO_UNDERLYING_TOKEN();

        (uint256 underlyingAmount, uint256 adjustedAmount) = _toUnderlyingAmount(amount);

         // _burn will check the (actual) amount availability again
         _burn(operator, account, adjustedAmount, userData.length != 0, userData, operatorData);

        uint256 amountBefore = _underlyingToken.balanceOf(address(this));
        _underlyingToken.safeTransfer(to, underlyingAmount);
        uint256 amountAfter = _underlyingToken.balanceOf(address(this));
        uint256 actualDowngradedAmount = amountBefore - amountAfter;
        if (underlyingAmount != actualDowngradedAmount) revert SUPER_TOKEN_INFLATIONARY_DEFLATIONARY_NOT_SUPPORTED();

        emit TokenDowngraded(account, adjustedAmount);
    }

    /**
     * @dev Handle decimal differences between underlying token and super token
     */
    function _toUnderlyingAmount(uint256 amount)
        private view
        returns (uint256 underlyingAmount, uint256 adjustedAmount)
    {
        uint256 factor;
        if (_underlyingDecimals < _STANDARD_DECIMALS) {
            // if underlying has less decimals
            // one can upgrade less "granualar" amount of tokens
            factor = 10 ** (_STANDARD_DECIMALS - _underlyingDecimals);
            underlyingAmount = amount / factor;
            // remove precision errors
            adjustedAmount = underlyingAmount * factor;
        } else if (_underlyingDecimals > _STANDARD_DECIMALS) {
            // if underlying has more decimals
            // one can upgrade more "granualar" amount of tokens
            factor = 10 ** (_underlyingDecimals - _STANDARD_DECIMALS);
            underlyingAmount = amount * factor;
            adjustedAmount = amount;
        } else {
            underlyingAmount = adjustedAmount = amount;
        }
    }

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

    function operationApprove(
        address account,
        address spender,
        uint256 amount
    )
        external virtual override
        onlyHost
    {
        _approve(account, spender, amount);
    }

    function operationIncreaseAllowance(
        address account,
        address spender,
        uint256 addedValue
    )
        external virtual override
        onlyHost
    {
        _approve(account, spender, _allowances[account][spender] + addedValue);
    }

    function operationDecreaseAllowance(
        address account,
        address spender,
        uint256 subtractedValue
    )
        external virtual override
        onlyHost
    {
        _approve(account, spender, _allowances[account][spender].sub(subtractedValue,
            "SuperToken: decreased allowance below zero"));
    }

    function operationTransferFrom(
        address account,
        address spender,
        address recipient,
        uint256 amount
    )
        external virtual override
        onlyHost
    {
        _transferFrom(account, spender, recipient, amount);
    }

    function operationSend(
        address spender,
        address recipient,
        uint256 amount,
        bytes memory userData
    )
        external virtual override
        onlyHost
    {
        _send(msg.sender, spender, recipient, amount, userData, "", true);
    }

    function operationUpgrade(address account, uint256 amount)
        external virtual override
        onlyHost
    {
        _upgrade(msg.sender, account, account, amount, "", "");
    }

    function operationDowngrade(address account, uint256 amount)
        external virtual override
        onlyHost
    {
        _downgrade(msg.sender, account, account, amount, "", "");
    }

    function operationUpgradeTo(address account, address to, uint256 amount)
        external virtual override
        onlyHost
    {
        _upgrade(msg.sender, account, to, amount, "", "");
    }

    function operationDowngradeTo(address account, address to, uint256 amount)
        external virtual override
        onlyHost
    {
        _downgrade(msg.sender, account, to, amount, "", "");
    }

    /**************************************************************************
    * Modifiers
    *************************************************************************/

    modifier onlySelf() {
        if (msg.sender != address(this)) revert SUPER_TOKEN_ONLY_SELF();
        _;
    }

    /**
     * @dev The host contract is implicitly the admin if admin is address(0) else it is the explicitly set admin
     * override address
     */
    modifier onlyAdmin() {
        address adminSlotAdmin = _getAdmin();
        address admin = adminSlotAdmin == address(0) ? address(_host) : adminSlotAdmin;
        if (msg.sender != admin) revert SUPER_TOKEN_ONLY_ADMIN();
        _;
    }

}

// SPDX-License-Identifier: AGPLv3
pragma solidity ^0.8.23;

/**
 * @title UUPS (Universal Upgradeable Proxy Standard) Shared Library
 */
library UUPSUtils {

    /**
     * @dev Implementation slot constant.
     * Using https://eips.ethereum.org/EIPS/eip-1967 standard
     * Storage slot 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc
     * (obtained as bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1)).
     */
    bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;

    /// @dev Get implementation address.
    function implementation() internal view returns (address impl) {
        assembly { // solium-disable-line
            impl := sload(_IMPLEMENTATION_SLOT)
        }
    }

    /// @dev Set new implementation address.
    function setImplementation(address codeAddress) internal {
        assembly {
            // solium-disable-line
            sstore(
                _IMPLEMENTATION_SLOT,
                codeAddress
            )
        }
    }

}

// SPDX-License-Identifier: AGPLv3
pragma solidity ^0.8.23;

import { UUPSUtils } from "./UUPSUtils.sol";
import { Initializable } from "@openzeppelin/contracts/proxy/utils/Initializable.sol";

/**
 * @title UUPS (Universal Upgradeable Proxy Standard) Proxiable contract.
 */
abstract contract UUPSProxiable is Initializable {

    /**
     * @dev Get current implementation code address.
     */
    function getCodeAddress() public view returns (address codeAddress)
    {
        return UUPSUtils.implementation();
    }

    function updateCode(address newAddress) external virtual;

    // allows to mark logic contracts as initialized
    // solhint-disable-next-line no-empty-blocks
    function castrate() external initializer { }

    /**
     * @dev Proxiable UUID marker function, this would help to avoid wrong logic
     *      contract to be used for upgrading.
     *
     * NOTE: The semantics of the UUID deviates from the actual UUPS standard,
     *       where it is equivalent of _IMPLEMENTATION_SLOT.
     */
    function proxiableUUID() public view virtual returns (bytes32);

    /**
     * @dev Update code address function.
     *      It is internal, so the derived contract could setup its own permission logic.
     */
    function _updateCodeAddress(address newAddress) internal
    {
        // require UUPSProxy.initializeProxy first
        require(UUPSUtils.implementation() != address(0), "UUPSProxiable: not upgradable");
        require(
            proxiableUUID() == UUPSProxiable(newAddress).proxiableUUID(),
            "UUPSProxiable: not compatible logic"
        );
        require(
            address(this) != newAddress,
            "UUPSProxiable: proxy loop"
        );
        UUPSUtils.setImplementation(newAddress);
        emit CodeUpdated(proxiableUUID(), newAddress);
    }

    event CodeUpdated(bytes32 uuid, address codeAddress);

}

// SPDX-License-Identifier: AGPLv3
pragma solidity ^0.8.23;

import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import { SafeCast } from "@openzeppelin/contracts/utils/math/SafeCast.sol";
import {
    ISuperfluid,
    ISuperAgreement,
    ISuperfluidGovernance,
    ISuperfluidToken
} from "../interfaces/superfluid/ISuperfluid.sol";
import { FixedSizeData } from "../libs/FixedSizeData.sol";

/**
 * @title Superfluid's token implementation
 *
 * @author Superfluid
 */
abstract contract SuperfluidToken is ISuperfluidToken
{

    bytes32 private constant _REWARD_ADDRESS_CONFIG_KEY =
        keccak256("org.superfluid-finance.superfluid.rewardAddress");

    using SafeCast for uint256;
    using SafeCast for int256;

    /// @dev Superfluid contract
    ISuperfluid immutable internal _host;

    /// @dev Active agreement bitmap
    mapping(address => uint256) internal _inactiveAgreementBitmap;

    /// @dev Shared Settled balance for the account
    mapping(address => int256) internal _sharedSettledBalances;

    /// @dev Total supply
    uint256 internal _totalSupply;

    // NOTE: for future compatibility, these are reserved solidity slots
    // The sub-class of SuperfluidToken solidity slot will start after _reserve13
    uint256 internal _reserve4;
    uint256 private _reserve5;
    uint256 private _reserve6;
    uint256 private _reserve7;
    uint256 private _reserve8;
    uint256 private _reserve9;
    uint256 private _reserve10;
    uint256 private _reserve11;
    uint256 private _reserve12;
    uint256 internal _reserve13;

    constructor(
        ISuperfluid host
    ) {
        _host = host;
    }

    /// @dev ISuperfluidToken.getHost implementation
    function getHost()
       external view
       override(ISuperfluidToken)
       returns(address host)
    {
       return address(_host);
    }

    /**************************************************************************
     * Real-time balance functions
     *************************************************************************/

    /// @dev ISuperfluidToken.realtimeBalanceOf implementation
    function realtimeBalanceOf(
       address account,
       uint256 timestamp
    )
       public view virtual override
       returns (
           int256 availableBalance,
           uint256 deposit,
           uint256 owedDeposit)
    {
        availableBalance = _sharedSettledBalances[account];
        ISuperAgreement[] memory activeAgreements = getAccountActiveAgreements(account);
        for (uint256 i = 0; i < activeAgreements.length; ++i) {
            (
                int256 agreementDynamicBalance,
                uint256 agreementDeposit,
                uint256 agreementOwedDeposit) = activeAgreements[i]
                    .realtimeBalanceOf(
                         this,
                         account,
                         timestamp
                     );
            deposit = deposit + agreementDeposit;
            owedDeposit = owedDeposit + agreementOwedDeposit;
            // 1. Available Balance = Dynamic Balance - Max(0, Deposit - OwedDeposit)
            // 2. Deposit should not be shared between agreements
            availableBalance = availableBalance
                + agreementDynamicBalance
                - (
                    agreementDeposit > agreementOwedDeposit ?
                    (agreementDeposit - agreementOwedDeposit) : 0
                ).toInt256();
        }
    }

    /// @dev ISuperfluidToken.realtimeBalanceOfNow implementation
    function realtimeBalanceOfNow(
       address account
    )
        public view virtual override
        returns (
            int256 availableBalance,
            uint256 deposit,
            uint256 owedDeposit,
            uint256 timestamp)
    {
        timestamp = _host.getNow();
        (
            availableBalance,
            deposit,
            owedDeposit
        ) = realtimeBalanceOf(account, timestamp);
    }

    function isAccountCritical(
        address account,
        uint256 timestamp
    )
        public view virtual override
        returns(bool isCritical)
    {
        (int256 availableBalance,,) = realtimeBalanceOf(account, timestamp);
        return availableBalance < 0;
    }

    function isAccountCriticalNow(
       address account
    )
        external view virtual override
       returns(bool isCritical)
    {
        return isAccountCritical(account, _host.getNow());
    }

    function isAccountSolvent(
        address account,
        uint256 timestamp
    )
        public view virtual override
        returns(bool isSolvent)
    {
        (int256 availableBalance, uint256 deposit, uint256 owedDeposit) =
            realtimeBalanceOf(account, timestamp);
        // Available Balance = Realtime Balance - Max(0, Deposit - OwedDeposit)
        int realtimeBalance = availableBalance
            + (deposit > owedDeposit ? (deposit - owedDeposit) : 0).toInt256();
        return realtimeBalance >= 0;
    }

    function isAccountSolventNow(
       address account
    )
       external view virtual override
       returns(bool isSolvent)
    {
        return isAccountSolvent(account, _host.getNow());
    }

    /// @dev ISuperfluidToken.getAccountActiveAgreements implementation
    function getAccountActiveAgreements(address account)
       public view virtual override
       returns(ISuperAgreement[] memory)
    {
       return _host.mapAgreementClasses(~_inactiveAgreementBitmap[account]);
    }

    /**************************************************************************
     * Token implementation helpers
     *************************************************************************/

    function _mint(
        address account,
        uint256 amount
    )
        internal
    {
        _sharedSettledBalances[account] = _sharedSettledBalances[account] + amount.toInt256();
        _totalSupply = _totalSupply + amount;
    }

    function _burn(
        address account,
        uint256 amount
    )
        internal
    {
        (int256 availableBalance,,) = realtimeBalanceOf(account, _host.getNow());
        if (availableBalance < amount.toInt256()) {
            revert SF_TOKEN_BURN_INSUFFICIENT_BALANCE();
        }
        _sharedSettledBalances[account] = _sharedSettledBalances[account] - amount.toInt256();
        _totalSupply = _totalSupply - amount;
    }

    function _move(
        address from,
        address to,
        int256 amount
    )
        internal
    {
        (int256 availableBalance,,) = realtimeBalanceOf(from, _host.getNow());
        if (availableBalance < amount) {
            revert SF_TOKEN_MOVE_INSUFFICIENT_BALANCE();
        }
        _sharedSettledBalances[from] = _sharedSettledBalances[from] - amount;
        _sharedSettledBalances[to] = _sharedSettledBalances[to] + amount;
    }

    function _getRewardAccount() internal view returns (address rewardAccount) {
        ISuperfluidGovernance gov = _host.getGovernance();
        rewardAccount = gov.getConfigAsAddress(_host, this, _REWARD_ADDRESS_CONFIG_KEY);
    }

    /**************************************************************************
     * Super Agreement hosting functions
     *************************************************************************/

    /// @dev ISuperfluidToken.createAgreement implementation
    function createAgreement(
        bytes32 id,
        bytes32[] calldata data
    )
        external virtual override
    {
        address agreementClass = msg.sender;
        bytes32 slot = keccak256(abi.encode("AgreementData", agreementClass, id));
        if (FixedSizeData.hasData(slot, data.length)) {
            revert SF_TOKEN_AGREEMENT_ALREADY_EXISTS();
        }
        FixedSizeData.storeData(slot, data);
        emit AgreementCreated(agreementClass, id, data);
    }

    /// @dev ISuperfluidToken.getAgreementData implementation
    function getAgreementData(
        address agreementClass,
        bytes32 id,
        uint dataLength
    )
        external view virtual override
        returns(bytes32[] memory data)
    {
        bytes32 slot = keccak256(abi.encode("AgreementData", agreementClass, id));
        data = FixedSizeData.loadData(slot, dataLength);
    }

    /// @dev ISuperfluidToken.updateAgreementData implementation
    function updateAgreementData(
        bytes32 id,
        bytes32[] calldata data
    )
        external virtual override
    {
        address agreementClass = msg.sender;
        bytes32 slot = keccak256(abi.encode("AgreementData", agreementClass, id));
        FixedSizeData.storeData(slot, data);
        emit AgreementUpdated(msg.sender, id, data);
    }

    /// @dev ISuperfluidToken.terminateAgreement implementation
    function terminateAgreement(
        bytes32 id,
        uint dataLength
    )
        external virtual override
    {
        address agreementClass = msg.sender;
        bytes32 slot = keccak256(abi.encode("AgreementData", agreementClass, id));
        if (!FixedSizeData.hasData(slot,dataLength)) {
            revert SF_TOKEN_AGREEMENT_DOES_NOT_EXIST();
        }
        FixedSizeData.eraseData(slot, dataLength);
        emit AgreementTerminated(msg.sender, id);
    }

    /// @dev ISuperfluidToken.updateAgreementState implementation
    function updateAgreementStateSlot(
        address account,
        uint256 slotId,
        bytes32[] calldata slotData
    )
        external virtual override
    {
        bytes32 slot = keccak256(abi.encode("AgreementState", msg.sender, account, slotId));
        FixedSizeData.storeData(slot, slotData);
        emit AgreementStateUpdated(msg.sender, account, slotId);
    }

    /// @dev ISuperfluidToken.getAgreementState implementation
    function getAgreementStateSlot(
        address agreementClass,
        address account,
        uint256 slotId,
        uint dataLength
    )
        external view virtual override
        returns (bytes32[] memory slotData) {
        bytes32 slot = keccak256(abi.encode("AgreementState", agreementClass, account, slotId));
        slotData = FixedSizeData.loadData(slot, dataLength);
    }

    /// @dev ISuperfluidToken.settleBalance implementation
    function settleBalance(
        address account,
        int256 delta
    )
        external virtual override
        onlyAgreement
    {
        _sharedSettledBalances[account] = _sharedSettledBalances[account] + delta;
    }

    /// @dev ISuperfluidToken.makeLiquidationPayoutsV2 implementation
    function makeLiquidationPayoutsV2(
        bytes32 id,
        bytes memory liquidationTypeData,
        address liquidatorAccount, // the address executing the liquidation
        bool useDefaultRewardAccount, // Whether or not the default reward account receives the rewardAmount
        address targetAccount, // Account to be liquidated
        uint256 rewardAmount, // The amount the rewarded account will receive
        int256 targetAccountBalanceDelta // The delta amount the target account balance should change by
    ) external virtual override onlyAgreement {
        address rewardAccount = _getRewardAccount();

        // we set the rewardAccount to the user who executed the liquidation if
        // no rewardAccount is set (aka. ANARCHY MODE - should not occur in reality, for testing purposes)
        if (rewardAccount == address(0)) {
            rewardAccount = liquidatorAccount;
        }

        address rewardAmountReceiver = useDefaultRewardAccount ? rewardAccount : liquidatorAccount;

        if (targetAccountBalanceDelta <= 0) {
            // LIKELY BRANCH: target account pays penalty to rewarded account
            assert(rewardAmount.toInt256() == -targetAccountBalanceDelta);

            _sharedSettledBalances[rewardAmountReceiver] += rewardAmount.toInt256();
            _sharedSettledBalances[targetAccount] += targetAccountBalanceDelta;

            emit IERC20.Transfer(targetAccount, rewardAmountReceiver, rewardAmount);
        } else {
            // LESS LIKELY BRANCH: target account is bailed out
            // NOTE: useDefaultRewardAccount being true is undefined behavior
            // because the default reward account isn't receiving the rewardAmount by default
            assert(!useDefaultRewardAccount);
            _sharedSettledBalances[rewardAccount] -= (rewardAmount.toInt256() + targetAccountBalanceDelta);
            _sharedSettledBalances[liquidatorAccount] += rewardAmount.toInt256();
            _sharedSettledBalances[targetAccount] += targetAccountBalanceDelta;

            emit IERC20.Transfer(rewardAccount, liquidatorAccount, rewardAmount);
            emit IERC20.Transfer(rewardAccount, targetAccount, uint256(targetAccountBalanceDelta));
        }

        emit AgreementLiquidatedV2(
            msg.sender,
            id,
            liquidatorAccount,
            targetAccount,
            rewardAmountReceiver,
            rewardAmount,
            targetAccountBalanceDelta,
            liquidationTypeData
        );
    }

    /**************************************************************************
    * Modifiers
    *************************************************************************/

    modifier onlyAgreement() {
        if (!_host.isAgreementClassListed(ISuperAgreement(msg.sender))) {
            revert SF_TOKEN_ONLY_LISTED_AGREEMENT();
        }
        _;
    }

    modifier onlyHost() {
        if (address(_host) != msg.sender) {
            revert SF_TOKEN_ONLY_HOST();
        }
        _;
    }

}

// SPDX-License-Identifier: AGPLv3
pragma solidity ^0.8.23;

/**
 * @title Utilities for fixed size data in storage
 * @author Superfluid
 *
 * When using solidity dynamic array, first word is used to store the length
 * of the array. For use cases that the length doesn't change, it is better
 * to use a fixed size data premitive.
 *
 * To use this library:
 * - The pointer to the storage is `slot`, the user could use `keccak256(abi.encode(...))`
 *   scheme to create collision-free slot ID for locating the data.
 * - To load data, or erase data and get all gas refund, data length is always required.
 */
library FixedSizeData {

    /**
     * @dev Store data to the slot at `slot`
     */
    function storeData(bytes32 slot, bytes32[] memory data) internal {
        for (uint j = 0; j < data.length; ++j) {
            bytes32 d = data[j];
            assembly { sstore(add(slot, j), d) }
        }
    }

    function hasData(bytes32 slot, uint dataLength) internal view returns (bool) {
        for (uint j = 0; j < dataLength; ++j) {
            bytes32 d;
            assembly { d := sload(add(slot, j)) }
            if (uint256(d) > 0) return true;
        }
        return false;
    }

    /**
     * @dev Load data of size `dataLength` from the slot at `slot`
     */
    function loadData(bytes32 slot, uint dataLength) internal view returns (bytes32[] memory data) {
        data = new bytes32[](dataLength);
        for (uint j = 0; j < dataLength; ++j) {
            bytes32 d;
            assembly { d := sload(add(slot, j)) }
            data[j] = d;
        }
    }

    /**
     * @dev Erase data of size `dataLength` from the slot at `slot`
     */
    function eraseData(bytes32 slot, uint dataLength) internal {
        for (uint j = 0; j < dataLength; ++j) {
            assembly { sstore(add(slot, j), 0) }
        }
    }

}

// SPDX-License-Identifier: AGPLv3
pragma solidity ^0.8.23;

import { IERC1820Registry } from "@openzeppelin/contracts/utils/introspection/IERC1820Registry.sol";

/**
 * @title ERC777 helper library
 * @author Superfluid
 */
library ERC777Helper {

    IERC1820Registry constant internal _ERC1820_REGISTRY =
        IERC1820Registry(0x1820a4B7618BdE71Dce8cdc73aAB6C95905faD24);

    bytes32 constant internal _TOKENS_SENDER_INTERFACE_HASH = keccak256("ERC777TokensSender");
    bytes32 constant internal _TOKENS_RECIPIENT_INTERFACE_HASH = keccak256("ERC777TokensRecipient");


    /// @dev ERC777 operators support self structure
    struct Operators {
        address[] defaultOperatorsArray;
        mapping(address => bool) defaultOperators;
        mapping(address => mapping(address => bool)) operators;
        mapping(address => mapping(address => bool)) revokedDefaultOperators;
    }

    function register(address token) internal {
        _ERC1820_REGISTRY.setInterfaceImplementer(token, keccak256("ERC777Token"), address(this));
        _ERC1820_REGISTRY.setInterfaceImplementer(token, keccak256("ERC20Token"), address(this));
    }

    function isOperatorFor(Operators storage self, address operator, address tokenHolder) internal view returns (bool) {
        return operator == tokenHolder ||
            (
                self.defaultOperators[operator] &&
                !self.revokedDefaultOperators[tokenHolder][operator]
            ) ||
            self.operators[tokenHolder][operator];
    }

    function authorizeOperator(Operators storage self, address holder, address operator) internal {
        require(holder != operator, "ERC777Operators: authorizing self as operator");

        if (self.defaultOperators[operator]) {
            delete self.revokedDefaultOperators[holder][operator];
        } else {
            self.operators[holder][operator] = true;
        }
    }

    function revokeOperator(Operators storage self, address holder, address operator) internal {
        require(operator != msg.sender, "ERC777Operators: revoking self as operator");
        if (self.defaultOperators[operator]) {
            self.revokedDefaultOperators[holder][operator] = true;
        } else {
            delete self.operators[holder][operator];
        }
    }

    function defaultOperators(Operators storage self) internal view returns (address[] memory) {
        return self.defaultOperatorsArray;
    }

    function setupDefaultOperators(Operators storage self, address[] memory operators) internal {
        // According to 777 spec: default operators should only be setup once
        assert(self.defaultOperatorsArray.length == 0);
        self.defaultOperatorsArray = operators;
        for (uint i = 0; i < operators.length; ++i) {
            self.defaultOperators[operators[i]] = true;
        }
    }

}

// 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 { ISuperAgreement } from "./ISuperAgreement.sol";

/**
 * @title Superfluid token interface
 * @author Superfluid
 */
interface ISuperfluidToken {

    /**************************************************************************
     * Errors
     *************************************************************************/
    error SF_TOKEN_AGREEMENT_ALREADY_EXISTS();  // 0xf05521f6
    error SF_TOKEN_AGREEMENT_DOES_NOT_EXIST();  // 0xdae18809
    error SF_TOKEN_BURN_INSUFFICIENT_BALANCE(); // 0x10ecdf44
    error SF_TOKEN_MOVE_INSUFFICIENT_BALANCE(); // 0x2f4cb941
    error SF_TOKEN_ONLY_LISTED_AGREEMENT();     // 0xc9ff6644
    error SF_TOKEN_ONLY_HOST();                 // 0xc51efddd

    /**************************************************************************
     * Basic information
     *************************************************************************/

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

    /**
     * @dev Encoded liquidation type data mainly used for handling stack to deep errors
     *
     * @custom:note 
     * - version: 1
     * - liquidationType key:
     *    - 0 = reward account receives reward (PIC period)
     *    - 1 = liquidator account receives reward (Pleb period)
     *    - 2 = liquidator account receives reward (Pirate period/bailout)
     */
    struct LiquidationTypeData {
        uint256 version;
        uint8 liquidationType;
    }

    /**************************************************************************
     * Real-time balance functions
     *************************************************************************/

    /**
    * @dev Calculate the real balance of a user, taking in consideration all agreements of the account
    * @param account for the query
    * @param timestamp Time of balance
    * @return availableBalance Real-time balance
    * @return deposit Account deposit
    * @return owedDeposit Account owed Deposit
    */
    function realtimeBalanceOf(
       address account,
       uint256 timestamp
    )
        external view
        returns (
            int256 availableBalance,
            uint256 deposit,
            uint256 owedDeposit);

    /**
     * @notice Calculate the realtime balance given the current host.getNow() value
     * @dev realtimeBalanceOf with timestamp equals to block timestamp
     * @param account for the query
     * @return availableBalance Real-time balance
     * @return deposit Account deposit
     * @return owedDeposit Account owed Deposit
     */
    function realtimeBalanceOfNow(
       address account
    )
        external view
        returns (
            int256 availableBalance,
            uint256 deposit,
            uint256 owedDeposit,
            uint256 timestamp);

    /**
    * @notice Check if account is critical
    * @dev A critical account is when availableBalance < 0
    * @param account The account to check
    * @param timestamp The time we'd like to check if the account is critical (should use future)
    * @return isCritical Whether the account is critical
    */
    function isAccountCritical(
        address account,
        uint256 timestamp
    )
        external view
        returns(bool isCritical);

    /**
    * @notice Check if account is critical now (current host.getNow())
    * @dev A critical account is when availableBalance < 0
    * @param account The account to check
    * @return isCritical Whether the account is critical
    */
    function isAccountCriticalNow(
        address account
    )
        external view
        returns(bool isCritical);

    /**
     * @notice Check if account is solvent
     * @dev An account is insolvent when the sum of deposits for a token can't cover the negative availableBalance
     * @param account The account to check
     * @param timestamp The time we'd like to check if the account is solvent (should use future)
     * @return isSolvent True if the account is solvent, false otherwise
     */
    function isAccountSolvent(
        address account,
        uint256 timestamp
    )
        external view
        returns(bool isSolvent);

    /**
     * @notice Check if account is solvent now
     * @dev An account is insolvent when the sum of deposits for a token can't cover the negative availableBalance
     * @param account The account to check
     * @return isSolvent True if the account is solvent, false otherwise
     */
    function isAccountSolventNow(
        address account
    )
        external view
        returns(bool isSolvent);

    /**
    * @notice Get a list of agreements that is active for the account
    * @dev An active agreement is one that has state for the account
    * @param account Account to query
    * @return activeAgreements List of accounts that have non-zero states for the account
    */
    function getAccountActiveAgreements(address account)
       external view
       returns(ISuperAgreement[] memory activeAgreements);


   /**************************************************************************
    * Super Agreement hosting functions
    *************************************************************************/

    /**
     * @dev Create a new agreement
     * @param id Agreement ID
     * @param data Agreement data
     */
    function createAgreement(
        bytes32 id,
        bytes32[] calldata data
    )
        external;
    /**
     * @dev Agreement created event
     * @param agreementClass Contract address of the agreement
     * @param id Agreement ID
     * @param data Agreement data
     */
    event AgreementCreated(
        address indexed agreementClass,
        bytes32 id,
        bytes32[] data
    );

    /**
     * @dev Get data of the agreement
     * @param agreementClass Contract address of the agreement
     * @param id Agreement ID
     * @return data Data of the agreement
     */
    function getAgreementData(
        address agreementClass,
        bytes32 id,
        uint dataLength
    )
        external view
        returns(bytes32[] memory data);

    /**
     * @dev Create a new agreement
     * @param id Agreement ID
     * @param data Agreement data
     */
    function updateAgreementData(
        bytes32 id,
        bytes32[] calldata data
    )
        external;
    /**
     * @dev Agreement updated event
     * @param agreementClass Contract address of the agreement
     * @param id Agreement ID
     * @param data Agreement data
     */
    event AgreementUpdated(
        address indexed agreementClass,
        bytes32 id,
        bytes32[] data
    );

    /**
     * @dev Close the agreement
     * @param id Agreement ID
     */
    function terminateAgreement(
        bytes32 id,
        uint dataLength
    )
        external;
    /**
     * @dev Agreement terminated event
     * @param agreementClass Contract address of the agreement
     * @param id Agreement ID
     */
    event AgreementTerminated(
        address indexed agreementClass,
        bytes32 id
    );

    /**
     * @dev Update agreement state slot
     * @param account Account to be updated
     *
     * @custom:note 
     * - To clear the storage out, provide zero-ed array of intended length
     */
    function updateAgreementStateSlot(
        address account,
        uint256 slotId,
        bytes32[] calldata slotData
    )
        external;
    /**
     * @dev Agreement account state updated event
     * @param agreementClass Contract address of the agreement
     * @param account Account updated
     * @param slotId slot id of the agreement state
     */
    event AgreementStateUpdated(
        address indexed agreementClass,
        address indexed account,
        uint256 slotId
    );

    /**
     * @dev Get data of the slot of the state of an agreement
     * @param agreementClass Contract address of the agreement
     * @param account Account to query
     * @param slotId slot id of the state
     * @param dataLength length of the state data
     */
    function getAgreementStateSlot(
        address agreementClass,
        address account,
        uint256 slotId,
        uint dataLength
    )
        external view
        returns (bytes32[] memory slotData);

    /**
     * @notice Settle balance from an account by the agreement
     * @dev The agreement needs to make sure that the balance delta is balanced afterwards
     * @param account Account to query.
     * @param delta Amount of balance delta to be settled
     *
     * @custom:modifiers 
     *  - onlyAgreement
     */
    function settleBalance(
        address account,
        int256 delta
    )
        external;

    /**
     * @dev Make liquidation payouts (v2)
     * @param id Agreement ID
     * @param liquidationTypeData Data regarding the version of the liquidation schema and the type
     * @param liquidatorAccount Address of the executor of the liquidation
     * @param useDefaultRewardAccount Whether or not the default reward account receives the rewardAmount
     * @param targetAccount Account to be liquidated
     * @param rewardAmount The amount the rewarded account will receive
     * @param targetAccountBalanceDelta The delta amount the target account balance should change by
     *
     * @custom:note 
     * - If a bailout is required (bailoutAmount > 0)
     *   - the actual reward (single deposit) goes to the executor,
     *   - while the reward account becomes the bailout account
     *   - total bailout include: bailout amount + reward amount
     *   - the targetAccount will be bailed out
     * - If a bailout is not required
     *   - the targetAccount will pay the rewardAmount
     *   - the liquidator (reward account in PIC period) will receive the rewardAmount
     *
     * @custom:modifiers 
     *  - onlyAgreement
     */
    function makeLiquidationPayoutsV2
    (
        bytes32 id,
        bytes memory liquidationTypeData,
        address liquidatorAccount,
        bool useDefaultRewardAccount,
        address targetAccount,
        uint256 rewardAmount,
        int256 targetAccountBalanceDelta
    ) external;
    /**
     * @dev Agreement liquidation event v2 (including agent account)
     * @param agreementClass Contract address of the agreement
     * @param id Agreement ID
     * @param liquidatorAccount Address of the executor of the liquidation
     * @param targetAccount Account of the stream sender
     * @param rewardAmountReceiver Account that collects the reward or bails out insolvent accounts
     * @param rewardAmount The amount the reward recipient account balance should change by
     * @param targetAccountBalanceDelta The amount the sender account balance should change by
     * @param liquidationTypeData The encoded liquidation type data including the version (how to decode)
     *
     * @custom:note 
     * Reward account rule:
     * - if the agreement is liquidated during the PIC period
     *   - the rewardAmountReceiver will get the rewardAmount (remaining deposit), regardless of the liquidatorAccount
     *   - the targetAccount will pay for the rewardAmount
     * - if the agreement is liquidated after the PIC period AND the targetAccount is solvent
     *   - the rewardAmountReceiver will get the rewardAmount (remaining deposit)
     *   - the targetAccount will pay for the rewardAmount
     * - if the targetAccount is insolvent
     *   - the liquidatorAccount will get the rewardAmount (single deposit)
     *   - the default reward account (governance) will pay for both the rewardAmount and bailoutAmount
     *   - the targetAccount will receive the bailoutAmount
     */
    event AgreementLiquidatedV2(
        address indexed agreementClass,
        bytes32 id,
        address indexed liquidatorAccount,
        address indexed targetAccount,
        address rewardAmountReceiver,
        uint256 rewardAmount,
        int256 targetAccountBalanceDelta,
        bytes liquidationTypeData
    );

    /**************************************************************************
     * 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 host contract
     //modifier onlyHost() virtual;

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

    /**************************************************************************
     * DEPRECATED
     *************************************************************************/

    /**
     * @dev Agreement liquidation event (DEPRECATED BY AgreementLiquidatedBy)
     * @param agreementClass Contract address of the agreement
     * @param id Agreement ID
     * @param penaltyAccount Account of the agreement to be penalized
     * @param rewardAccount Account that collect the reward
     * @param rewardAmount Amount of liquidation reward
     *
     * @custom:deprecated Use AgreementLiquidatedV2 instead
     */
    event AgreementLiquidated(
        address indexed agreementClass,
        bytes32 id,
        address indexed penaltyAccount,
        address indexed rewardAccount,
        uint256 rewardAmount
    );

    /**
     * @dev System bailout occurred (DEPRECATED BY AgreementLiquidatedBy)
     * @param bailoutAccount Account that bailout the penalty account
     * @param bailoutAmount Amount of account bailout
     *
     * @custom:deprecated Use AgreementLiquidatedV2 instead
     */
    event Bailout(
        address indexed bailoutAccount,
        uint256 bailoutAmount
    );

    /**
     * @dev Agreement liquidation event (DEPRECATED BY AgreementLiquidatedV2)
     * @param liquidatorAccount Account of the agent that performed the liquidation.
     * @param agreementClass Contract address of the agreement
     * @param id Agreement ID
     * @param penaltyAccount Account of the agreement to be penalized
     * @param bondAccount Account that collect the reward or bailout accounts
     * @param rewardAmount Amount of liquidation reward
     * @param bailoutAmount Amount of liquidation bailouot
     *
     * @custom:deprecated Use AgreementLiquidatedV2 instead
     *
     * @custom:note 
     * Reward account rule:
     * - if bailout is equal to 0, then
     *   - the bondAccount will get the rewardAmount,
     *   - the penaltyAccount will pay for the rewardAmount.
     * - if bailout is larger than 0, then
     *   - the liquidatorAccount will get the rewardAmouont,
     *   - the bondAccount will pay for both the rewardAmount and bailoutAmount,
     *   - the penaltyAccount will pay for the rewardAmount while get the bailoutAmount.
     */
    event AgreementLiquidatedBy(
        address liquidatorAccount,
        address indexed agreementClass,
        bytes32 id,
        address indexed penaltyAccount,
        address indexed bondAccount,
        uint256 rewardAmount,
        uint256 bailoutAmount
    );
}

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

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

/**
 * @title Superfluid governance interface
 * @author Superfluid
 */
interface ISuperfluidGovernance {

    /**************************************************************************
     * Errors
     *************************************************************************/
    error SF_GOV_INVALID_LIQUIDATION_OR_PATRICIAN_PERIOD(); // 0xe171980a
    error SF_GOV_MUST_BE_CONTRACT();                        // 0x80dddd73

    /**
     * @dev Replace the current governance with a new governance
     */
    function replaceGovernance(
        ISuperfluid host,
        address newGov) external;

    /**
     * @dev Register a new agreement class
     */
    function registerAgreementClass(
        ISuperfluid host,
        address agreementClass) external;

    /**
     * @dev Update logics of the contracts
     *
     * @custom:note
     * - Because they might have inter-dependencies, it is good to have one single function to update them all
     */
    function updateContracts(
        ISuperfluid host,
        address hostNewLogic,
        address[] calldata agreementClassNewLogics,
        address superTokenFactoryNewLogic,
        address beaconNewLogic
    ) external;

    /**
     * @dev Update supertoken logic contract to the latest that is managed by the super token factory
     */
    function batchUpdateSuperTokenLogic(
        ISuperfluid host,
        ISuperToken[] calldata tokens) external;

    /**
     * @dev Update supertoken logic contract to the provided logic contracts.
     *      Note that this is an overloaded version taking an additional argument `tokenLogics`
     */
    function batchUpdateSuperTokenLogic(
        ISuperfluid host,
        ISuperToken[] calldata tokens,
        address[] calldata tokenLogics) external;

    /**
     * @dev Set configuration as address value
     */
    function setConfig(
        ISuperfluid host,
        ISuperfluidToken superToken,
        bytes32 key,
        address value
    ) external;

    /**
     * @dev Set configuration as uint256 value
     */
    function setConfig(
        ISuperfluid host,
        ISuperfluidToken superToken,
        bytes32 key,
        uint256 value
    ) external;

    /**
     * @dev Clear configuration
     */
    function clearConfig(
        ISuperfluid host,
        ISuperfluidToken superToken,
        bytes32 key
    ) external;

    /**
     * @dev Get configuration as address value
     */
    function getConfigAsAddress(
        ISuperfluid host,
        ISuperfluidToken superToken,
        bytes32 key) external view returns (address value);

    /**
     * @dev Get configuration as uint256 value
     */
    function getConfigAsUint256(
        ISuperfluid host,
        ISuperfluidToken superToken,
        bytes32 key) external view returns (uint256 value);

}

// 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 { 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
     *
     * NOTE: `batchCall` is `payable, because there's limited support for sending
     * native tokens to batch operation targets.
     * If value is > 0, the whole amount is sent to the first operation matching any of:
     * - OPERATION_TYPE_SUPERFLUID_CALL_APP_ACTION
     * - OPERATION_TYPE_SIMPLE_FORWARD_CALL
     * - OPERATION_TYPE_ERC2771_FORWARD_CALL
     * If the first such operation does not allow receiving native tokens,
     * the transaction will revert.
     * It's currently not possible to send native tokens to multiple operations, or to
     * any but the first operation of one of the above mentioned types.
     * If no such operation is included, the native tokens will be sent back to the sender.
     */
    function batchCall(Operation[] calldata operations) external payable;

    /**
     * @dev Batch call function with EIP-2771 encoded msgSender
     * @param operations Array of batch operations
     *
     * NOTE: This can be called only by contracts recognized as _trusted forwarder_
     * by the host contract (see `Superfluid.isTrustedForwarder`).
     * If native tokens are passed along, the same rules as for `batchCall` apply,
     * with an optional refund going to the encoded msgSender.
     */
    function forwardBatchCall(Operation[] calldata operations) external payable;

    /**************************************************************************
     * 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; */
}

// 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;

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 { 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 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;

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

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

    /**
     * @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 { 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";

/**
 * @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;

/**
 * @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 SuperToken.upgradeTo batch operation type
     *
     * Call spec:
     * ISuperToken(target).operationUpgradeTo(
     *     abi.decode(data, (address to, uint256 amount)
     * )
     */
    uint32 constant internal OPERATION_TYPE_SUPERTOKEN_UPGRADE_TO = 3 + 100;
    /**
     * @dev SuperToken.downgradeTo batch operation type
     *
     * Call spec:
     * ISuperToken(target).operationDowngradeTo(
     *     abi.decode(data, (address to, uint256 amount)
     * )
     */
    uint32 constant internal OPERATION_TYPE_SUPERTOKEN_DOWNGRADE_TO = 4 + 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;
    /**
     * @dev DMZForwarder.forwardCall batch operation type
     *
     * Call spec:
     * forwardCall(
     *     target,
     *     data
     * )
     */
    uint32 constant internal OPERATION_TYPE_SIMPLE_FORWARD_CALL = 1 + 300;
    /**
     * @dev DMZForwarder.forward2771Call batch operation type
     *
     * Call spec:
     * forward2771Call(
     *     target,
     *     msgSender,
     *     data
     * )
     *
     * NOTE: In the context of this operation, the `DZMForwarder` contract acts as the
     * _trusted forwarder_ which must be trusted by the _recipient contract_ (operation target).
     * It shall do so by dynamically looking up the DMZForwarder used by the host, like this:
     *
     * function isTrustedForwarder(address forwarder) public view returns(bool) {
     *     return forwarder == address(host.DMZ_FORWARDER());
     * }
     *
     * If used in the context of a `forwardBatchCall`, we effectively have a chaining/nesting
     * of ERC-2771 calls where the host acts as _recipient contract_ of the enveloping 2771 call
     * and the DMZForwarder acts as the _trusted forwarder_ of the nested 2771 call(s).
     * That's why `msgSender` could be either the actual `msg.sender` (if using `batchCall`)
     * or the relayed sender address (if using `forwardBatchCall`).
     */
    uint32 constant internal OPERATION_TYPE_ERC2771_FORWARD_CALL = 2 + 300;
}

/**
 * @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: AGPLv3
pragma solidity >=0.8.4;

import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import { ISuperfluidToken } from "../../superfluid/ISuperfluidToken.sol";

/**
 * @dev The interface for any super token pool regardless of the distribution schemes.
 */
interface ISuperfluidPool is IERC20 {
    // Custom Errors

    error SUPERFLUID_POOL_INVALID_TIME();               // 0x83c35016
    error SUPERFLUID_POOL_NO_POOL_MEMBERS();            // 0xe10f405a
    error SUPERFLUID_POOL_NO_ZERO_ADDRESS();            // 0x54eb6ee6
    error SUPERFLUID_POOL_NOT_POOL_ADMIN_OR_GDA();      // 0x1c5fbdcb
    error SUPERFLUID_POOL_NOT_GDA();                    // 0xfcbe3f9e
    error SUPERFLUID_POOL_TRANSFER_UNITS_NOT_ALLOWED(); // 0x2285efba
    error SUPERFLUID_POOL_SELF_TRANSFER_NOT_ALLOWED();  // 0xceddc0be

    // Events
    event MemberUnitsUpdated(
        ISuperfluidToken indexed token, address indexed member, uint128 oldUnits, uint128 newUnits
    );
    event DistributionClaimed(
        ISuperfluidToken indexed token, address indexed member, int256 claimedAmount, int256 totalClaimed
    );

    /// @notice A boolean indicating whether pool members can transfer their units
    function transferabilityForUnitsOwner() external view returns (bool);

    /// @notice A boolean indicating whether addresses other than the pool admin can distribute via the pool
    function distributionFromAnyAddress() external view returns (bool);

    /// @notice The pool admin
    /// @dev The admin is the creator of the pool and has permissions to update member units
    /// and is the recipient of the adjustment flow rate
    function admin() external view returns (address);

    /// @notice The SuperToken for the pool
    function superToken() external view returns (ISuperfluidToken);

    /// @notice The total units of the pool
    function getTotalUnits() external view returns (uint128);

    /// @notice The total number of units of connected members
    function getTotalConnectedUnits() external view returns (uint128);

    /// @notice The total number of units of disconnected members
    function getTotalDisconnectedUnits() external view returns (uint128);

    /// @notice The total number of units for `memberAddr`
    /// @param memberAddr The address of the member
    function getUnits(address memberAddr) external view returns (uint128);

    /// @notice The total flow rate of the pool
    function getTotalFlowRate() external view returns (int96);

    /// @notice The flow rate of the connected members
    function getTotalConnectedFlowRate() external view returns (int96);

    /// @notice The flow rate of the disconnected members
    function getTotalDisconnectedFlowRate() external view returns (int96);

    /// @notice The balance of all the disconnected members at `time`
    /// @param time The time to query
    function getDisconnectedBalance(uint32 time) external view returns (int256 balance);

    /// @notice The total amount received by `memberAddr` in the pool
    /// @param memberAddr The address of the member
    /// @return totalAmountReceived The total amount received by the member
    function getTotalAmountReceivedByMember(address memberAddr) external view returns (uint256 totalAmountReceived);

    /// @notice The flow rate a member is receiving from the pool
    /// @param memberAddr The address of the member
    function getMemberFlowRate(address memberAddr) external view returns (int96);

    /// @notice The claimable balance for `memberAddr` at `time` in the pool
    /// @param memberAddr The address of the member
    /// @param time The time to query
    function getClaimable(address memberAddr, uint32 time) external view returns (int256);

    /// @notice The claimable balance for `memberAddr` at `block.timestamp` in the pool
    /// @param memberAddr The address of the member
    function getClaimableNow(address memberAddr) external view returns (int256 claimableBalance, uint256 timestamp);

    /// @notice Sets `memberAddr` ownedUnits to `newUnits`
    /// @param memberAddr The address of the member
    /// @param newUnits The new units for the member
    function updateMemberUnits(address memberAddr, uint128 newUnits) external returns (bool);

    /// @notice Claims the claimable balance for `memberAddr` at `block.timestamp`
    /// @param memberAddr The address of the member
    function claimAll(address memberAddr) external returns (bool);

    /// @notice Claims the claimable balance for `msg.sender` at `block.timestamp`
    function claimAll() external returns (bool);

    /// @notice Increases the allowance of `spender` by `addedValue`
    /// @param spender The address of the spender
    /// @param addedValue The amount to increase the allowance by
    /// @return true if successful
    function increaseAllowance(address spender, uint256 addedValue) external returns (bool);

    /// @notice Decreases the allowance of `spender` by `subtractedValue`
    /// @param spender The address of the spender
    /// @param subtractedValue The amount to decrease the allowance by
    /// @return true if successful
    function decreaseAllowance(address spender, uint256 subtractedValue) external returns (bool);
}

// 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 { 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: 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: 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 {

    // 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);

    /// @dev Gets the GDA flow data between `from` and `to` of `token`
    /// @param token The token address
    /// @param from The sender address
    /// @param to The receiver address
    /// @return lastUpdated The timestamp of when the flow was last updated
    /// @return flowRate The flow rate
    /// @return deposit The amount of deposit the flow
    function getFlow(ISuperfluidToken token, address from, ISuperfluidPool to)
        external
        view
        virtual
        returns (uint256 lastUpdated, int96 flowRate, uint256 deposit);

    /// @dev Gets the aggregated GDA flow info of `account` for `token`
    /// @param token The token address
    /// @param account The account address
    /// @return timestamp The timestamp of when the 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
    function getAccountFlowInfo(ISuperfluidToken token, address account)
        external
        view
        virtual
        returns (uint256 timestamp, int96 flowRate, uint256 deposit);

    /// @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 { 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
// OpenZeppelin Contracts (last updated v4.9.0) (utils/math/SafeMath.sol)

pragma solidity ^0.8.0;

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

/**
 * @dev Wrappers over Solidity's arithmetic operations.
 *
 * NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler
 * now has built in overflow checking.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

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

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

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

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

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

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

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

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SafeCast.sol)
// This file was procedurally generated from scripts/generate/templates/SafeCast.js.

pragma solidity ^0.8.0;

/**
 * @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow
 * checks.
 *
 * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can
 * easily result in undesired exploitation or bugs, since developers usually
 * assume that overflows raise errors. `SafeCast` restores this intuition by
 * reverting the transaction when such an operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 *
 * Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing
 * all math on `uint256` and `int256` and then downcasting.
 */
library SafeCast {
    /**
     * @dev Returns the downcasted uint248 from uint256, reverting on
     * overflow (when the input is greater than largest uint248).
     *
     * Counterpart to Solidity's `uint248` operator.
     *
     * Requirements:
     *
     * - input must fit into 248 bits
     *
     * _Available since v4.7._
     */
    function toUint248(uint256 value) internal pure returns (uint248) {
        require(value <= type(uint248).max, "SafeCast: value doesn't fit in 248 bits");
        return uint248(value);
    }

    /**
     * @dev Returns the downcasted uint240 from uint256, reverting on
     * overflow (when the input is greater than largest uint240).
     *
     * Counterpart to Solidity's `uint240` operator.
     *
     * Requirements:
     *
     * - input must fit into 240 bits
     *
     * _Available since v4.7._
     */
    function toUint240(uint256 value) internal pure returns (uint240) {
        require(value <= type(uint240).max, "SafeCast: value doesn't fit in 240 bits");
        return uint240(value);
    }

    /**
     * @dev Returns the downcasted uint232 from uint256, reverting on
     * overflow (when the input is greater than largest uint232).
     *
     * Counterpart to Solidity's `uint232` operator.
     *
     * Requirements:
     *
     * - input must fit into 232 bits
     *
     * _Available since v4.7._
     */
    function toUint232(uint256 value) internal pure returns (uint232) {
        require(value <= type(uint232).max, "SafeCast: value doesn't fit in 232 bits");
        return uint232(value);
    }

    /**
     * @dev Returns the downcasted uint224 from uint256, reverting on
     * overflow (when the input is greater than largest uint224).
     *
     * Counterpart to Solidity's `uint224` operator.
     *
     * Requirements:
     *
     * - input must fit into 224 bits
     *
     * _Available since v4.2._
     */
    function toUint224(uint256 value) internal pure returns (uint224) {
        require(value <= type(uint224).max, "SafeCast: value doesn't fit in 224 bits");
        return uint224(value);
    }

    /**
     * @dev Returns the downcasted uint216 from uint256, reverting on
     * overflow (when the input is greater than largest uint216).
     *
     * Counterpart to Solidity's `uint216` operator.
     *
     * Requirements:
     *
     * - input must fit into 216 bits
     *
     * _Available since v4.7._
     */
    function toUint216(uint256 value) internal pure returns (uint216) {
        require(value <= type(uint216).max, "SafeCast: value doesn't fit in 216 bits");
        return uint216(value);
    }

    /**
     * @dev Returns the downcasted uint208 from uint256, reverting on
     * overflow (when the input is greater than largest uint208).
     *
     * Counterpart to Solidity's `uint208` operator.
     *
     * Requirements:
     *
     * - input must fit into 208 bits
     *
     * _Available since v4.7._
     */
    function toUint208(uint256 value) internal pure returns (uint208) {
        require(value <= type(uint208).max, "SafeCast: value doesn't fit in 208 bits");
        return uint208(value);
    }

    /**
     * @dev Returns the downcasted uint200 from uint256, reverting on
     * overflow (when the input is greater than largest uint200).
     *
     * Counterpart to Solidity's `uint200` operator.
     *
     * Requirements:
     *
     * - input must fit into 200 bits
     *
     * _Available since v4.7._
     */
    function toUint200(uint256 value) internal pure returns (uint200) {
        require(value <= type(uint200).max, "SafeCast: value doesn't fit in 200 bits");
        return uint200(value);
    }

    /**
     * @dev Returns the downcasted uint192 from uint256, reverting on
     * overflow (when the input is greater than largest uint192).
     *
     * Counterpart to Solidity's `uint192` operator.
     *
     * Requirements:
     *
     * - input must fit into 192 bits
     *
     * _Available since v4.7._
     */
    function toUint192(uint256 value) internal pure returns (uint192) {
        require(value <= type(uint192).max, "SafeCast: value doesn't fit in 192 bits");
        return uint192(value);
    }

    /**
     * @dev Returns the downcasted uint184 from uint256, reverting on
     * overflow (when the input is greater than largest uint184).
     *
     * Counterpart to Solidity's `uint184` operator.
     *
     * Requirements:
     *
     * - input must fit into 184 bits
     *
     * _Available since v4.7._
     */
    function toUint184(uint256 value) internal pure returns (uint184) {
        require(value <= type(uint184).max, "SafeCast: value doesn't fit in 184 bits");
        return uint184(value);
    }

    /**
     * @dev Returns the downcasted uint176 from uint256, reverting on
     * overflow (when the input is greater than largest uint176).
     *
     * Counterpart to Solidity's `uint176` operator.
     *
     * Requirements:
     *
     * - input must fit into 176 bits
     *
     * _Available since v4.7._
     */
    function toUint176(uint256 value) internal pure returns (uint176) {
        require(value <= type(uint176).max, "SafeCast: value doesn't fit in 176 bits");
        return uint176(value);
    }

    /**
     * @dev Returns the downcasted uint168 from uint256, reverting on
     * overflow (when the input is greater than largest uint168).
     *
     * Counterpart to Solidity's `uint168` operator.
     *
     * Requirements:
     *
     * - input must fit into 168 bits
     *
     * _Available since v4.7._
     */
    function toUint168(uint256 value) internal pure returns (uint168) {
        require(value <= type(uint168).max, "SafeCast: value doesn't fit in 168 bits");
        return uint168(value);
    }

    /**
     * @dev Returns the downcasted uint160 from uint256, reverting on
     * overflow (when the input is greater than largest uint160).
     *
     * Counterpart to Solidity's `uint160` operator.
     *
     * Requirements:
     *
     * - input must fit into 160 bits
     *
     * _Available since v4.7._
     */
    function toUint160(uint256 value) internal pure returns (uint160) {
        require(value <= type(uint160).max, "SafeCast: value doesn't fit in 160 bits");
        return uint160(value);
    }

    /**
     * @dev Returns the downcasted uint152 from uint256, reverting on
     * overflow (when the input is greater than largest uint152).
     *
     * Counterpart to Solidity's `uint152` operator.
     *
     * Requirements:
     *
     * - input must fit into 152 bits
     *
     * _Available since v4.7._
     */
    function toUint152(uint256 value) internal pure returns (uint152) {
        require(value <= type(uint152).max, "SafeCast: value doesn't fit in 152 bits");
        return uint152(value);
    }

    /**
     * @dev Returns the downcasted uint144 from uint256, reverting on
     * overflow (when the input is greater than largest uint144).
     *
     * Counterpart to Solidity's `uint144` operator.
     *
     * Requirements:
     *
     * - input must fit into 144 bits
     *
     * _Available since v4.7._
     */
    function toUint144(uint256 value) internal pure returns (uint144) {
        require(value <= type(uint144).max, "SafeCast: value doesn't fit in 144 bits");
        return uint144(value);
    }

    /**
     * @dev Returns the downcasted uint136 from uint256, reverting on
     * overflow (when the input is greater than largest uint136).
     *
     * Counterpart to Solidity's `uint136` operator.
     *
     * Requirements:
     *
     * - input must fit into 136 bits
     *
     * _Available since v4.7._
     */
    function toUint136(uint256 value) internal pure returns (uint136) {
        require(value <= type(uint136).max, "SafeCast: value doesn't fit in 136 bits");
        return uint136(value);
    }

    /**
     * @dev Returns the downcasted uint128 from uint256, reverting on
     * overflow (when the input is greater than largest uint128).
     *
     * Counterpart to Solidity's `uint128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     *
     * _Available since v2.5._
     */
    function toUint128(uint256 value) internal pure returns (uint128) {
        require(value <= type(uint128).max, "SafeCast: value doesn't fit in 128 bits");
        return uint128(value);
    }

    /**
     * @dev Returns the downcasted uint120 from uint256, reverting on
     * overflow (when the input is greater than largest uint120).
     *
     * Counterpart to Solidity's `uint120` operator.
     *
     * Requirements:
     *
     * - input must fit into 120 bits
     *
     * _Available since v4.7._
     */
    function toUint120(uint256 value) internal pure returns (uint120) {
        require(value <= type(uint120).max, "SafeCast: value doesn't fit in 120 bits");
        return uint120(value);
    }

    /**
     * @dev Returns the downcasted uint112 from uint256, reverting on
     * overflow (when the input is greater than largest uint112).
     *
     * Counterpart to Solidity's `uint112` operator.
     *
     * Requirements:
     *
     * - input must fit into 112 bits
     *
     * _Available since v4.7._
     */
    function toUint112(uint256 value) internal pure returns (uint112) {
        require(value <= type(uint112).max, "SafeCast: value doesn't fit in 112 bits");
        return uint112(value);
    }

    /**
     * @dev Returns the downcasted uint104 from uint256, reverting on
     * overflow (when the input is greater than largest uint104).
     *
     * Counterpart to Solidity's `uint104` operator.
     *
     * Requirements:
     *
     * - input must fit into 104 bits
     *
     * _Available since v4.7._
     */
    function toUint104(uint256 value) internal pure returns (uint104) {
        require(value <= type(uint104).max, "SafeCast: value doesn't fit in 104 bits");
        return uint104(value);
    }

    /**
     * @dev Returns the downcasted uint96 from uint256, reverting on
     * overflow (when the input is greater than largest uint96).
     *
     * Counterpart to Solidity's `uint96` operator.
     *
     * Requirements:
     *
     * - input must fit into 96 bits
     *
     * _Available since v4.2._
     */
    function toUint96(uint256 value) internal pure returns (uint96) {
        require(value <= type(uint96).max, "SafeCast: value doesn't fit in 96 bits");
        return uint96(value);
    }

    /**
     * @dev Returns the downcasted uint88 from uint256, reverting on
     * overflow (when the input is greater than largest uint88).
     *
     * Counterpart to Solidity's `uint88` operator.
     *
     * Requirements:
     *
     * - input must fit into 88 bits
     *
     * _Available since v4.7._
     */
    function toUint88(uint256 value) internal pure returns (uint88) {
        require(value <= type(uint88).max, "SafeCast: value doesn't fit in 88 bits");
        return uint88(value);
    }

    /**
     * @dev Returns the downcasted uint80 from uint256, reverting on
     * overflow (when the input is greater than largest uint80).
     *
     * Counterpart to Solidity's `uint80` operator.
     *
     * Requirements:
     *
     * - input must fit into 80 bits
     *
     * _Available since v4.7._
     */
    function toUint80(uint256 value) internal pure returns (uint80) {
        require(value <= type(uint80).max, "SafeCast: value doesn't fit in 80 bits");
        return uint80(value);
    }

    /**
     * @dev Returns the downcasted uint72 from uint256, reverting on
     * overflow (when the input is greater than largest uint72).
     *
     * Counterpart to Solidity's `uint72` operator.
     *
     * Requirements:
     *
     * - input must fit into 72 bits
     *
     * _Available since v4.7._
     */
    function toUint72(uint256 value) internal pure returns (uint72) {
        require(value <= type(uint72).max, "SafeCast: value doesn't fit in 72 bits");
        return uint72(value);
    }

    /**
     * @dev Returns the downcasted uint64 from uint256, reverting on
     * overflow (when the input is greater than largest uint64).
     *
     * Counterpart to Solidity's `uint64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     *
     * _Available since v2.5._
     */
    function toUint64(uint256 value) internal pure returns (uint64) {
        require(value <= type(uint64).max, "SafeCast: value doesn't fit in 64 bits");
        return uint64(value);
    }

    /**
     * @dev Returns the downcasted uint56 from uint256, reverting on
     * overflow (when the input is greater than largest uint56).
     *
     * Counterpart to Solidity's `uint56` operator.
     *
     * Requirements:
     *
     * - input must fit into 56 bits
     *
     * _Available since v4.7._
     */
    function toUint56(uint256 value) internal pure returns (uint56) {
        require(value <= type(uint56).max, "SafeCast: value doesn't fit in 56 bits");
        return uint56(value);
    }

    /**
     * @dev Returns the downcasted uint48 from uint256, reverting on
     * overflow (when the input is greater than largest uint48).
     *
     * Counterpart to Solidity's `uint48` operator.
     *
     * Requirements:
     *
     * - input must fit into 48 bits
     *
     * _Available since v4.7._
     */
    function toUint48(uint256 value) internal pure returns (uint48) {
        require(value <= type(uint48).max, "SafeCast: value doesn't fit in 48 bits");
        return uint48(value);
    }

    /**
     * @dev Returns the downcasted uint40 from uint256, reverting on
     * overflow (when the input is greater than largest uint40).
     *
     * Counterpart to Solidity's `uint40` operator.
     *
     * Requirements:
     *
     * - input must fit into 40 bits
     *
     * _Available since v4.7._
     */
    function toUint40(uint256 value) internal pure returns (uint40) {
        require(value <= type(uint40).max, "SafeCast: value doesn't fit in 40 bits");
        return uint40(value);
    }

    /**
     * @dev Returns the downcasted uint32 from uint256, reverting on
     * overflow (when the input is greater than largest uint32).
     *
     * Counterpart to Solidity's `uint32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     *
     * _Available since v2.5._
     */
    function toUint32(uint256 value) internal pure returns (uint32) {
        require(value <= type(uint32).max, "SafeCast: value doesn't fit in 32 bits");
        return uint32(value);
    }

    /**
     * @dev Returns the downcasted uint24 from uint256, reverting on
     * overflow (when the input is greater than largest uint24).
     *
     * Counterpart to Solidity's `uint24` operator.
     *
     * Requirements:
     *
     * - input must fit into 24 bits
     *
     * _Available since v4.7._
     */
    function toUint24(uint256 value) internal pure returns (uint24) {
        require(value <= type(uint24).max, "SafeCast: value doesn't fit in 24 bits");
        return uint24(value);
    }

    /**
     * @dev Returns the downcasted uint16 from uint256, reverting on
     * overflow (when the input is greater than largest uint16).
     *
     * Counterpart to Solidity's `uint16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     *
     * _Available since v2.5._
     */
    function toUint16(uint256 value) internal pure returns (uint16) {
        require(value <= type(uint16).max, "SafeCast: value doesn't fit in 16 bits");
        return uint16(value);
    }

    /**
     * @dev Returns the downcasted uint8 from uint256, reverting on
     * overflow (when the input is greater than largest uint8).
     *
     * Counterpart to Solidity's `uint8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits
     *
     * _Available since v2.5._
     */
    function toUint8(uint256 value) internal pure returns (uint8) {
        require(value <= type(uint8).max, "SafeCast: value doesn't fit in 8 bits");
        return uint8(value);
    }

    /**
     * @dev Converts a signed int256 into an unsigned uint256.
     *
     * Requirements:
     *
     * - input must be greater than or equal to 0.
     *
     * _Available since v3.0._
     */
    function toUint256(int256 value) internal pure returns (uint256) {
        require(value >= 0, "SafeCast: value must be positive");
        return uint256(value);
    }

    /**
     * @dev Returns the downcasted int248 from int256, reverting on
     * overflow (when the input is less than smallest int248 or
     * greater than largest int248).
     *
     * Counterpart to Solidity's `int248` operator.
     *
     * Requirements:
     *
     * - input must fit into 248 bits
     *
     * _Available since v4.7._
     */
    function toInt248(int256 value) internal pure returns (int248 downcasted) {
        downcasted = int248(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 248 bits");
    }

    /**
     * @dev Returns the downcasted int240 from int256, reverting on
     * overflow (when the input is less than smallest int240 or
     * greater than largest int240).
     *
     * Counterpart to Solidity's `int240` operator.
     *
     * Requirements:
     *
     * - input must fit into 240 bits
     *
     * _Available since v4.7._
     */
    function toInt240(int256 value) internal pure returns (int240 downcasted) {
        downcasted = int240(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 240 bits");
    }

    /**
     * @dev Returns the downcasted int232 from int256, reverting on
     * overflow (when the input is less than smallest int232 or
     * greater than largest int232).
     *
     * Counterpart to Solidity's `int232` operator.
     *
     * Requirements:
     *
     * - input must fit into 232 bits
     *
     * _Available since v4.7._
     */
    function toInt232(int256 value) internal pure returns (int232 downcasted) {
        downcasted = int232(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 232 bits");
    }

    /**
     * @dev Returns the downcasted int224 from int256, reverting on
     * overflow (when the input is less than smallest int224 or
     * greater than largest int224).
     *
     * Counterpart to Solidity's `int224` operator.
     *
     * Requirements:
     *
     * - input must fit into 224 bits
     *
     * _Available since v4.7._
     */
    function toInt224(int256 value) internal pure returns (int224 downcasted) {
        downcasted = int224(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 224 bits");
    }

    /**
     * @dev Returns the downcasted int216 from int256, reverting on
     * overflow (when the input is less than smallest int216 or
     * greater than largest int216).
     *
     * Counterpart to Solidity's `int216` operator.
     *
     * Requirements:
     *
     * - input must fit into 216 bits
     *
     * _Available since v4.7._
     */
    function toInt216(int256 value) internal pure returns (int216 downcasted) {
        downcasted = int216(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 216 bits");
    }

    /**
     * @dev Returns the downcasted int208 from int256, reverting on
     * overflow (when the input is less than smallest int208 or
     * greater than largest int208).
     *
     * Counterpart to Solidity's `int208` operator.
     *
     * Requirements:
     *
     * - input must fit into 208 bits
     *
     * _Available since v4.7._
     */
    function toInt208(int256 value) internal pure returns (int208 downcasted) {
        downcasted = int208(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 208 bits");
    }

    /**
     * @dev Returns the downcasted int200 from int256, reverting on
     * overflow (when the input is less than smallest int200 or
     * greater than largest int200).
     *
     * Counterpart to Solidity's `int200` operator.
     *
     * Requirements:
     *
     * - input must fit into 200 bits
     *
     * _Available since v4.7._
     */
    function toInt200(int256 value) internal pure returns (int200 downcasted) {
        downcasted = int200(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 200 bits");
    }

    /**
     * @dev Returns the downcasted int192 from int256, reverting on
     * overflow (when the input is less than smallest int192 or
     * greater than largest int192).
     *
     * Counterpart to Solidity's `int192` operator.
     *
     * Requirements:
     *
     * - input must fit into 192 bits
     *
     * _Available since v4.7._
     */
    function toInt192(int256 value) internal pure returns (int192 downcasted) {
        downcasted = int192(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 192 bits");
    }

    /**
     * @dev Returns the downcasted int184 from int256, reverting on
     * overflow (when the input is less than smallest int184 or
     * greater than largest int184).
     *
     * Counterpart to Solidity's `int184` operator.
     *
     * Requirements:
     *
     * - input must fit into 184 bits
     *
     * _Available since v4.7._
     */
    function toInt184(int256 value) internal pure returns (int184 downcasted) {
        downcasted = int184(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 184 bits");
    }

    /**
     * @dev Returns the downcasted int176 from int256, reverting on
     * overflow (when the input is less than smallest int176 or
     * greater than largest int176).
     *
     * Counterpart to Solidity's `int176` operator.
     *
     * Requirements:
     *
     * - input must fit into 176 bits
     *
     * _Available since v4.7._
     */
    function toInt176(int256 value) internal pure returns (int176 downcasted) {
        downcasted = int176(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 176 bits");
    }

    /**
     * @dev Returns the downcasted int168 from int256, reverting on
     * overflow (when the input is less than smallest int168 or
     * greater than largest int168).
     *
     * Counterpart to Solidity's `int168` operator.
     *
     * Requirements:
     *
     * - input must fit into 168 bits
     *
     * _Available since v4.7._
     */
    function toInt168(int256 value) internal pure returns (int168 downcasted) {
        downcasted = int168(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 168 bits");
    }

    /**
     * @dev Returns the downcasted int160 from int256, reverting on
     * overflow (when the input is less than smallest int160 or
     * greater than largest int160).
     *
     * Counterpart to Solidity's `int160` operator.
     *
     * Requirements:
     *
     * - input must fit into 160 bits
     *
     * _Available since v4.7._
     */
    function toInt160(int256 value) internal pure returns (int160 downcasted) {
        downcasted = int160(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 160 bits");
    }

    /**
     * @dev Returns the downcasted int152 from int256, reverting on
     * overflow (when the input is less than smallest int152 or
     * greater than largest int152).
     *
     * Counterpart to Solidity's `int152` operator.
     *
     * Requirements:
     *
     * - input must fit into 152 bits
     *
     * _Available since v4.7._
     */
    function toInt152(int256 value) internal pure returns (int152 downcasted) {
        downcasted = int152(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 152 bits");
    }

    /**
     * @dev Returns the downcasted int144 from int256, reverting on
     * overflow (when the input is less than smallest int144 or
     * greater than largest int144).
     *
     * Counterpart to Solidity's `int144` operator.
     *
     * Requirements:
     *
     * - input must fit into 144 bits
     *
     * _Available since v4.7._
     */
    function toInt144(int256 value) internal pure returns (int144 downcasted) {
        downcasted = int144(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 144 bits");
    }

    /**
     * @dev Returns the downcasted int136 from int256, reverting on
     * overflow (when the input is less than smallest int136 or
     * greater than largest int136).
     *
     * Counterpart to Solidity's `int136` operator.
     *
     * Requirements:
     *
     * - input must fit into 136 bits
     *
     * _Available since v4.7._
     */
    function toInt136(int256 value) internal pure returns (int136 downcasted) {
        downcasted = int136(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 136 bits");
    }

    /**
     * @dev Returns the downcasted int128 from int256, reverting on
     * overflow (when the input is less than smallest int128 or
     * greater than largest int128).
     *
     * Counterpart to Solidity's `int128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     *
     * _Available since v3.1._
     */
    function toInt128(int256 value) internal pure returns (int128 downcasted) {
        downcasted = int128(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 128 bits");
    }

    /**
     * @dev Returns the downcasted int120 from int256, reverting on
     * overflow (when the input is less than smallest int120 or
     * greater than largest int120).
     *
     * Counterpart to Solidity's `int120` operator.
     *
     * Requirements:
     *
     * - input must fit into 120 bits
     *
     * _Available since v4.7._
     */
    function toInt120(int256 value) internal pure returns (int120 downcasted) {
        downcasted = int120(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 120 bits");
    }

    /**
     * @dev Returns the downcasted int112 from int256, reverting on
     * overflow (when the input is less than smallest int112 or
     * greater than largest int112).
     *
     * Counterpart to Solidity's `int112` operator.
     *
     * Requirements:
     *
     * - input must fit into 112 bits
     *
     * _Available since v4.7._
     */
    function toInt112(int256 value) internal pure returns (int112 downcasted) {
        downcasted = int112(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 112 bits");
    }

    /**
     * @dev Returns the downcasted int104 from int256, reverting on
     * overflow (when the input is less than smallest int104 or
     * greater than largest int104).
     *
     * Counterpart to Solidity's `int104` operator.
     *
     * Requirements:
     *
     * - input must fit into 104 bits
     *
     * _Available since v4.7._
     */
    function toInt104(int256 value) internal pure returns (int104 downcasted) {
        downcasted = int104(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 104 bits");
    }

    /**
     * @dev Returns the downcasted int96 from int256, reverting on
     * overflow (when the input is less than smallest int96 or
     * greater than largest int96).
     *
     * Counterpart to Solidity's `int96` operator.
     *
     * Requirements:
     *
     * - input must fit into 96 bits
     *
     * _Available since v4.7._
     */
    function toInt96(int256 value) internal pure returns (int96 downcasted) {
        downcasted = int96(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 96 bits");
    }

    /**
     * @dev Returns the downcasted int88 from int256, reverting on
     * overflow (when the input is less than smallest int88 or
     * greater than largest int88).
     *
     * Counterpart to Solidity's `int88` operator.
     *
     * Requirements:
     *
     * - input must fit into 88 bits
     *
     * _Available since v4.7._
     */
    function toInt88(int256 value) internal pure returns (int88 downcasted) {
        downcasted = int88(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 88 bits");
    }

    /**
     * @dev Returns the downcasted int80 from int256, reverting on
     * overflow (when the input is less than smallest int80 or
     * greater than largest int80).
     *
     * Counterpart to Solidity's `int80` operator.
     *
     * Requirements:
     *
     * - input must fit into 80 bits
     *
     * _Available since v4.7._
     */
    function toInt80(int256 value) internal pure returns (int80 downcasted) {
        downcasted = int80(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 80 bits");
    }

    /**
     * @dev Returns the downcasted int72 from int256, reverting on
     * overflow (when the input is less than smallest int72 or
     * greater than largest int72).
     *
     * Counterpart to Solidity's `int72` operator.
     *
     * Requirements:
     *
     * - input must fit into 72 bits
     *
     * _Available since v4.7._
     */
    function toInt72(int256 value) internal pure returns (int72 downcasted) {
        downcasted = int72(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 72 bits");
    }

    /**
     * @dev Returns the downcasted int64 from int256, reverting on
     * overflow (when the input is less than smallest int64 or
     * greater than largest int64).
     *
     * Counterpart to Solidity's `int64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     *
     * _Available since v3.1._
     */
    function toInt64(int256 value) internal pure returns (int64 downcasted) {
        downcasted = int64(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 64 bits");
    }

    /**
     * @dev Returns the downcasted int56 from int256, reverting on
     * overflow (when the input is less than smallest int56 or
     * greater than largest int56).
     *
     * Counterpart to Solidity's `int56` operator.
     *
     * Requirements:
     *
     * - input must fit into 56 bits
     *
     * _Available since v4.7._
     */
    function toInt56(int256 value) internal pure returns (int56 downcasted) {
        downcasted = int56(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 56 bits");
    }

    /**
     * @dev Returns the downcasted int48 from int256, reverting on
     * overflow (when the input is less than smallest int48 or
     * greater than largest int48).
     *
     * Counterpart to Solidity's `int48` operator.
     *
     * Requirements:
     *
     * - input must fit into 48 bits
     *
     * _Available since v4.7._
     */
    function toInt48(int256 value) internal pure returns (int48 downcasted) {
        downcasted = int48(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 48 bits");
    }

    /**
     * @dev Returns the downcasted int40 from int256, reverting on
     * overflow (when the input is less than smallest int40 or
     * greater than largest int40).
     *
     * Counterpart to Solidity's `int40` operator.
     *
     * Requirements:
     *
     * - input must fit into 40 bits
     *
     * _Available since v4.7._
     */
    function toInt40(int256 value) internal pure returns (int40 downcasted) {
        downcasted = int40(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 40 bits");
    }

    /**
     * @dev Returns the downcasted int32 from int256, reverting on
     * overflow (when the input is less than smallest int32 or
     * greater than largest int32).
     *
     * Counterpart to Solidity's `int32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     *
     * _Available since v3.1._
     */
    function toInt32(int256 value) internal pure returns (int32 downcasted) {
        downcasted = int32(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 32 bits");
    }

    /**
     * @dev Returns the downcasted int24 from int256, reverting on
     * overflow (when the input is less than smallest int24 or
     * greater than largest int24).
     *
     * Counterpart to Solidity's `int24` operator.
     *
     * Requirements:
     *
     * - input must fit into 24 bits
     *
     * _Available since v4.7._
     */
    function toInt24(int256 value) internal pure returns (int24 downcasted) {
        downcasted = int24(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 24 bits");
    }

    /**
     * @dev Returns the downcasted int16 from int256, reverting on
     * overflow (when the input is less than smallest int16 or
     * greater than largest int16).
     *
     * Counterpart to Solidity's `int16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     *
     * _Available since v3.1._
     */
    function toInt16(int256 value) internal pure returns (int16 downcasted) {
        downcasted = int16(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 16 bits");
    }

    /**
     * @dev Returns the downcasted int8 from int256, reverting on
     * overflow (when the input is less than smallest int8 or
     * greater than largest int8).
     *
     * Counterpart to Solidity's `int8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits
     *
     * _Available since v3.1._
     */
    function toInt8(int256 value) internal pure returns (int8 downcasted) {
        downcasted = int8(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 8 bits");
    }

    /**
     * @dev Converts an unsigned uint256 into a signed int256.
     *
     * Requirements:
     *
     * - input must be less than or equal to maxInt256.
     *
     * _Available since v3.0._
     */
    function toInt256(uint256 value) internal pure returns (int256) {
        // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive
        require(value <= uint256(type(int256).max), "SafeCast: value doesn't fit in an int256");
        return int256(value);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/introspection/IERC1820Registry.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the global ERC1820 Registry, as defined in the
 * https://eips.ethereum.org/EIPS/eip-1820[EIP]. Accounts may register
 * implementers for interfaces in this registry, as well as query support.
 *
 * Implementers may be shared by multiple accounts, and can also implement more
 * than a single interface for each account. Contracts can implement interfaces
 * for themselves, but externally-owned accounts (EOA) must delegate this to a
 * contract.
 *
 * {IERC165} interfaces can also be queried via the registry.
 *
 * For an in-depth explanation and source code analysis, see the EIP text.
 */
interface IERC1820Registry {
    event InterfaceImplementerSet(address indexed account, bytes32 indexed interfaceHash, address indexed implementer);

    event ManagerChanged(address indexed account, address indexed newManager);

    /**
     * @dev Sets `newManager` as the manager for `account`. A manager of an
     * account is able to set interface implementers for it.
     *
     * By default, each account is its own manager. Passing a value of `0x0` in
     * `newManager` will reset the manager to this initial state.
     *
     * Emits a {ManagerChanged} event.
     *
     * Requirements:
     *
     * - the caller must be the current manager for `account`.
     */
    function setManager(address account, address newManager) external;

    /**
     * @dev Returns the manager for `account`.
     *
     * See {setManager}.
     */
    function getManager(address account) external view returns (address);

    /**
     * @dev Sets the `implementer` contract as ``account``'s implementer for
     * `interfaceHash`.
     *
     * `account` being the zero address is an alias for the caller's address.
     * The zero address can also be used in `implementer` to remove an old one.
     *
     * See {interfaceHash} to learn how these are created.
     *
     * Emits an {InterfaceImplementerSet} event.
     *
     * Requirements:
     *
     * - the caller must be the current manager for `account`.
     * - `interfaceHash` must not be an {IERC165} interface id (i.e. it must not
     * end in 28 zeroes).
     * - `implementer` must implement {IERC1820Implementer} and return true when
     * queried for support, unless `implementer` is the caller. See
     * {IERC1820Implementer-canImplementInterfaceForAddress}.
     */
    function setInterfaceImplementer(address account, bytes32 _interfaceHash, address implementer) external;

    /**
     * @dev Returns the implementer of `interfaceHash` for `account`. If no such
     * implementer is registered, returns the zero address.
     *
     * If `interfaceHash` is an {IERC165} interface id (i.e. it ends with 28
     * zeroes), `account` will be queried for support of it.
     *
     * `account` being the zero address is an alias for the caller's address.
     */
    function getInterfaceImplementer(address account, bytes32 _interfaceHash) external view returns (address);

    /**
     * @dev Returns the interface hash for an `interfaceName`, as defined in the
     * corresponding
     * https://eips.ethereum.org/EIPS/eip-1820#interface-name[section of the EIP].
     */
    function interfaceHash(string calldata interfaceName) external pure returns (bytes32);

    /**
     * @notice Updates the cache with whether the contract implements an ERC165 interface or not.
     * @param account Address of the contract for which to update the cache.
     * @param interfaceId ERC165 interface for which to update the cache.
     */
    function updateERC165Cache(address account, bytes4 interfaceId) external;

    /**
     * @notice Checks whether a contract implements an ERC165 interface or not.
     * If the result is not cached a direct lookup on the contract address is performed.
     * If the result is not cached or the cached value is out-of-date, the cache MUST be updated manually by calling
     * {updateERC165Cache} with the contract address.
     * @param account Address of the contract to check.
     * @param interfaceId ERC165 interface to check.
     * @return True if `account` implements `interfaceId`, false otherwise.
     */
    function implementsERC165Interface(address account, bytes4 interfaceId) external view returns (bool);

    /**
     * @notice Checks whether a contract implements an ERC165 interface or not without using or updating the cache.
     * @param account Address of the contract to check.
     * @param interfaceId ERC165 interface to check.
     * @return True if `account` implements `interfaceId`, false otherwise.
     */
    function implementsERC165InterfaceNoCache(address account, bytes4 interfaceId) external view returns (bool);
}

// 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) (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 v4.4.1 (token/ERC777/IERC777Sender.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC777TokensSender standard as defined in the EIP.
 *
 * {IERC777} Token holders can be notified of operations performed on their
 * tokens by having a contract implement this interface (contract holders can be
 * their own implementer) and registering it on the
 * https://eips.ethereum.org/EIPS/eip-1820[ERC1820 global registry].
 *
 * See {IERC1820Registry} and {ERC1820Implementer}.
 */
interface IERC777Sender {
    /**
     * @dev Called by an {IERC777} token contract whenever a registered holder's
     * (`from`) tokens are about to be moved or destroyed. The type of operation
     * is conveyed by `to` being the zero address or not.
     *
     * This call occurs _before_ the token contract's state is updated, so
     * {IERC777-balanceOf}, etc., can be used to query the pre-operation state.
     *
     * This function may revert to prevent the operation from being executed.
     */
    function tokensToSend(
        address operator,
        address from,
        address to,
        uint256 amount,
        bytes calldata userData,
        bytes calldata operatorData
    ) external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC777/IERC777Recipient.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC777TokensRecipient standard as defined in the EIP.
 *
 * Accounts can be notified of {IERC777} tokens being sent to them by having a
 * contract implement this interface (contract holders can be their own
 * implementer) and registering it on the
 * https://eips.ethereum.org/EIPS/eip-1820[ERC1820 global registry].
 *
 * See {IERC1820Registry} and {ERC1820Implementer}.
 */
interface IERC777Recipient {
    /**
     * @dev Called by an {IERC777} token contract whenever tokens are being
     * moved or created into a registered account (`to`). The type of operation
     * is conveyed by `from` being the zero address or not.
     *
     * This call occurs _after_ the token contract's state is updated, so
     * {IERC777-balanceOf}, etc., can be used to query the post-operation state.
     *
     * This function may revert to prevent the operation from being executed.
     */
    function tokensReceived(
        address operator,
        address from,
        address to,
        uint256 amount,
        bytes calldata userData,
        bytes calldata operatorData
    ) external;
}

// 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
// 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 v4.9.0) (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 (last updated v4.9.3) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.4) (token/ERC20/extensions/IERC20Permit.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 *
 * ==== Security Considerations
 *
 * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature
 * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be
 * considered as an intention to spend the allowance in any specific way. The second is that because permits have
 * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should
 * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be
 * generally recommended is:
 *
 * ```solidity
 * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public {
 *     try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {}
 *     doThing(..., value);
 * }
 *
 * function doThing(..., uint256 value) public {
 *     token.safeTransferFrom(msg.sender, address(this), value);
 *     ...
 * }
 * ```
 *
 * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of
 * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also
 * {SafeERC20-safeTransferFrom}).
 *
 * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so
 * contracts should have entry points that don't rely on permit.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     *
     * CAUTION: See Security Considerations above.
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

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

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

// 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/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 (last updated v4.9.0) (proxy/utils/Initializable.sol)

pragma solidity ^0.8.2;

import "../../utils/Address.sol";

/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 *
 * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be
 * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in
 * case an upgrade adds a module that needs to be initialized.
 *
 * For example:
 *
 * [.hljs-theme-light.nopadding]
 * ```solidity
 * contract MyToken is ERC20Upgradeable {
 *     function initialize() initializer public {
 *         __ERC20_init("MyToken", "MTK");
 *     }
 * }
 *
 * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {
 *     function initializeV2() reinitializer(2) public {
 *         __ERC20Permit_init("MyToken");
 *     }
 * }
 * ```
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 *
 * [CAUTION]
 * ====
 * Avoid leaving a contract uninitialized.
 *
 * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
 * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke
 * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * /// @custom:oz-upgrades-unsafe-allow constructor
 * constructor() {
 *     _disableInitializers();
 * }
 * ```
 * ====
 */
abstract contract Initializable {
    /**
     * @dev Indicates that the contract has been initialized.
     * @custom:oz-retyped-from bool
     */
    uint8 private _initialized;

    /**
     * @dev Indicates that the contract is in the process of being initialized.
     */
    bool private _initializing;

    /**
     * @dev Triggered when the contract has been initialized or reinitialized.
     */
    event Initialized(uint8 version);

    /**
     * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,
     * `onlyInitializing` functions can be used to initialize parent contracts.
     *
     * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a
     * constructor.
     *
     * Emits an {Initialized} event.
     */
    modifier initializer() {
        bool isTopLevelCall = !_initializing;
        require(
            (isTopLevelCall && _initialized < 1) || (!Address.isContract(address(this)) && _initialized == 1),
            "Initializable: contract is already initialized"
        );
        _initialized = 1;
        if (isTopLevelCall) {
            _initializing = true;
        }
        _;
        if (isTopLevelCall) {
            _initializing = false;
            emit Initialized(1);
        }
    }

    /**
     * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the
     * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be
     * used to initialize parent contracts.
     *
     * A reinitializer may be used after the original initialization step. This is essential to configure modules that
     * are added through upgrades and that require initialization.
     *
     * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`
     * cannot be nested. If one is invoked in the context of another, execution will revert.
     *
     * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in
     * a contract, executing them in the right order is up to the developer or operator.
     *
     * WARNING: setting the version to 255 will prevent any future reinitialization.
     *
     * Emits an {Initialized} event.
     */
    modifier reinitializer(uint8 version) {
        require(!_initializing && _initialized < version, "Initializable: contract is already initialized");
        _initialized = version;
        _initializing = true;
        _;
        _initializing = false;
        emit Initialized(version);
    }

    /**
     * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
     * {initializer} and {reinitializer} modifiers, directly or indirectly.
     */
    modifier onlyInitializing() {
        require(_initializing, "Initializable: contract is not initializing");
        _;
    }

    /**
     * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.
     * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized
     * to any version. It is recommended to use this to lock implementation contracts that are designed to be called
     * through proxies.
     *
     * Emits an {Initialized} event the first time it is successfully executed.
     */
    function _disableInitializers() internal virtual {
        require(!_initializing, "Initializable: contract is initializing");
        if (_initialized != type(uint8).max) {
            _initialized = type(uint8).max;
            emit Initialized(type(uint8).max);
        }
    }

    /**
     * @dev Returns the highest version that has been initialized. See {reinitializer}.
     */
    function _getInitializedVersion() internal view returns (uint8) {
        return _initialized;
    }

    /**
     * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.
     */
    function _isInitializing() internal view returns (bool) {
        return _initializing;
    }
}

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

• No Contract Security Audit Submitted- Submit Audit Here

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ion"},{"inputs":[{"internalType":"bytes32","name":"id","type":"bytes32"},{"internalType":"bytes32[]","name":"data","type":"bytes32[]"}],"name":"updateAgreementData","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"slotId","type":"uint256"},{"internalType":"bytes32[]","name":"slotData","type":"bytes32[]"}],"name":"updateAgreementStateSlot","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newAddress","type":"address"}],"name":"updateCode","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"upgrade","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"bytes","name":"userData","type":"bytes"}],"name":"upgradeTo","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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000000000000000000000000cf8acb4ef033eff16e8080aed4c7d5b9285d2192000000000000000000000000051e766e2d8dc65ae2bfcf084a50ad04476342270000000000000000000000000043d7c85c8b96a49a72a92c0b48cdc4720437d7000000000000000000000000a132a33bb6ed51085d376b3cc90c7723171ebb790000000000000000000000009dc144ba10c1d0ac64b36f409c70093c72300257

-----Decoded View---------------
Arg [0] : host (address): 0xCf8Acb4eF033efF16E8080aed4c7D5B9285D2192
Arg [1] : constantOutflowNFT (address): 0x051e766e2d8dc65ae2bFCF084A50AD0447634227
Arg [2] : constantInflowNFT (address): 0x0043d7c85C8b96a49A72A92C0B48CdC4720437d7
Arg [3] : poolAdminNFT (address): 0xa132a33bB6ED51085d376b3CC90c7723171ebb79
Arg [4] : poolMemberNFT (address): 0x9dC144bA10C1d0AC64B36f409C70093c72300257

-----Encoded View---------------
5 Constructor Arguments found :
Arg [0] : 000000000000000000000000cf8acb4ef033eff16e8080aed4c7d5b9285d2192
Arg [1] : 000000000000000000000000051e766e2d8dc65ae2bfcf084a50ad0447634227
Arg [2] : 0000000000000000000000000043d7c85c8b96a49a72a92c0b48cdc4720437d7
Arg [3] : 000000000000000000000000a132a33bb6ed51085d376b3cc90c7723171ebb79
Arg [4] : 0000000000000000000000009dc144ba10c1d0ac64b36f409c70093c72300257