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

pragma solidity ^0.8.0;

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

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

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

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

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

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

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/draft-IERC20Permit.sol)

pragma solidity ^0.8.0;

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../extensions/draft-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;

    function safeTransfer(
        IERC20 token,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    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));
    }

    function safeIncreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender) + value;
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    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");
            uint256 newAllowance = oldAllowance - value;
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
        }
    }

    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");
        if (returndata.length > 0) {
            // Return data is optional
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

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

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return 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 (utils/Context.sol)

pragma solidity ^0.8.0;

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

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

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

/**
 * @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_REGISTRATION_ONLY_IN_CONSTRUCTOR = 1;
    uint256 constant internal APP_RULE_NO_REGISTRATION_FOR_EOA = 2;
    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 SuperToken.upgrade batch operation type
     *
     * Call spec:
     * ISuperToken(target).operationUpgrade(
     *     abi.decode(data, (uint256 amount)
     * )
     */
    uint32 constant internal OPERATION_TYPE_SUPERTOKEN_UPGRADE = 1 + 100;
    /**
     * @dev SuperToken.downgrade batch operation type
     *
     * Call spec:
     * ISuperToken(target).operationDowngrade(
     *     abi.decode(data, (uint256 amount)
     * )
     */
    uint32 constant internal OPERATION_TYPE_SUPERTOKEN_DOWNGRADE = 2 + 100;
    /**
     * @dev Superfluid.callAgreement batch operation type
     *
     * Call spec:
     * callAgreement(
     *     ISuperAgreement(target)),
     *     abi.decode(data, (bytes callData, bytes userData)
     * )
     */
    uint32 constant internal OPERATION_TYPE_SUPERFLUID_CALL_AGREEMENT = 1 + 200;
    /**
     * @dev Superfluid.callAppAction batch operation type
     *
     * Call spec:
     * callAppAction(
     *     ISuperApp(target)),
     *     data
     * )
     */
    uint32 constant internal OPERATION_TYPE_SUPERFLUID_CALL_APP_ACTION = 2 + 200;
}

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

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

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

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

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

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

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

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: AGPLv3
pragma solidity >= 0.8.4;

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: AGPLv3
pragma solidity >= 0.8.4;

import { ISuperfluidGovernance } from "./ISuperfluidGovernance.sol";
import { ISuperfluidToken } from "./ISuperfluidToken.sol";
import { ISuperToken } from "./ISuperToken.sol";
import { ISuperTokenFactory } from "./ISuperTokenFactory.sol";
import { ISuperAgreement } from "./ISuperAgreement.sol";
import { ISuperApp } from "./ISuperApp.sol";
import {
    BatchOperation,
    ContextDefinitions,
    FlowOperatorDefinitions,
    SuperAppDefinitions,
    SuperfluidGovernanceConfigs
} from "./Definitions.sol";
import { TokenInfo } from "../tokens/TokenInfo.sol";
import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import { IERC777 } from "@openzeppelin/contracts/token/ERC777/IERC777.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

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

    error HOST_INVALID_OR_EXPIRED_SUPER_APP_REGISTRATION_KEY(); // 0x19ab84d1
    error HOST_NOT_A_SUPER_APP();                               // 0x163cbe43
    error HOST_NO_APP_REGISTRATION_PERMISSIONS();               // 0x5b93ebf0
    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
    error HOST_UNAUTHORIZED_SUPER_APP_FACTORY();                // 0x289533c5

    /**************************************************************************
     * 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
     * @dev Refer to ISuperTokenFactory.Upgradability for expected behaviours
     */
    function updateSuperTokenLogic(ISuperToken token) external;
    /**
     * @dev SuperToken logic updated event
     * @param code Address of the new SuperToken logic
     */
    event SuperTokenLogicUpdated(ISuperToken indexed token, address code);

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

    /**
     * @dev Message sender (must be a contract) declares itself as a super app.
     * @custom:deprecated you should use `registerAppWithKey` or `registerAppByFactory` instead,
     * because app registration is currently governance permissioned on mainnets.
     * @param configWord The super app manifest configuration, flags are defined in
     * `SuperAppDefinitions`
     */
    function registerApp(uint256 configWord) external;
    /**
     * @dev App registered event
     * @param app Address of jailed app
     */
    event AppRegistered(ISuperApp indexed app);

    /**
     * @dev Message sender declares itself as a super app.
     * @param configWord The super app manifest configuration, flags are defined in `SuperAppDefinitions`
     * @param registrationKey The registration key issued by the governance, needed to register on a mainnet.
     * @notice See https://github.com/superfluid-finance/protocol-monorepo/wiki/Super-App-White-listing-Guide
     * On testnets or in dev environment, a placeholder (e.g. empty string) can be used.
     * While the message sender must be the super app itself, the transaction sender (tx.origin)
     * must be the deployer account the registration key was issued for.
     */
    function registerAppWithKey(uint256 configWord, string calldata registrationKey) external;

    /**
     * @dev Message sender (must be a contract) declares app as a super app
     * @param configWord The super app manifest configuration, flags are defined in `SuperAppDefinitions`
     * @notice On mainnet deployments, only factory contracts pre-authorized by governance can use this.
     * See https://github.com/superfluid-finance/protocol-monorepo/wiki/Super-App-White-listing-Guide
     */
    function registerAppByFactory(ISuperApp app, uint256 configWord) external;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

     // onlyGovernance

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

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

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

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


/**
 * @title Superfluid governance interface
 * @author Superfluid
 */
interface ISuperfluidGovernance {
    
    /**************************************************************************
     * Errors
     *************************************************************************/
    error SF_GOV_ARRAYS_NOT_SAME_LENGTH();                  // 0x27743aa6
    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
    ) 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 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: AGPLv3
pragma solidity >= 0.8.4;

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: AGPLv3
pragma solidity >= 0.8.4;

import { ISuperfluid } from "./ISuperfluid.sol";
import { ISuperfluidToken } from "./ISuperfluidToken.sol";
import { TokenInfo } from "../tokens/TokenInfo.sol";
import { IERC777 } from "@openzeppelin/contracts/token/ERC777/IERC777.sol";
import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";

/**
 * @title Super token (Superfluid Token + ERC20 + ERC777) interface
 * @author Superfluid
 */
interface ISuperToken is ISuperfluidToken, TokenInfo, IERC20, 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_HOST();                               // 0x98f73704
    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

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

    /**************************************************************************
    * TokenInfo & ERC777
    *************************************************************************/

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

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() external view override(IERC777, TokenInfo) 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(TokenInfo) 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 `data` 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 data) 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 `data` 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 data) 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 `data` 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 data,
        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 `data` 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 data,
        bytes calldata operatorData
    ) external override(IERC777);

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

    /**
     * @dev Mint new tokens for the account
     *
     * @custom:modifiers 
     *  - onlySelf
     */
    function selfMint(
        address account,
        uint256 amount,
        bytes memory userData
    ) external;

   /**
    * @dev Burn existing tokens for the account
    *
    * @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 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 data 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 `data` 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 data) 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;

    /**
    * @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 data Arbitrary user inputted data
    *
    * @custom:modifiers 
    *  - onlyHost
    */
    function operationSend(
        address spender,
        address recipient,
        uint256 amount,
        bytes memory data
    ) 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;


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

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

import {
    IERC20,
    ERC20WithTokenInfo
} from "../tokens/ERC20WithTokenInfo.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_ZERO_ADDRESS();   // 0x305c9e82

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

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

    /**
     * @dev Get the current super token logic used by the factory
     */
    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
     * @return superToken The deployed and initialized wrapper super token
     */
    function createERC20Wrapper(
        IERC20 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 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(
        ERC20WithTokenInfo 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(ERC20WithTokenInfo _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: AGPLv3
pragma solidity >= 0.8.4;

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

/**
 * @title ERC20 token with token info interface
 * @author Superfluid
 * @dev Using abstract contract instead of interfaces because old solidity
 *      does not support interface inheriting other interfaces
 * solhint-disable-next-line no-empty-blocks
 *
 */
// solhint-disable-next-line no-empty-blocks
abstract contract ERC20WithTokenInfo is IERC20, TokenInfo {}

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

/**
 * @title ERC20 token info interface
 * @author Superfluid
 * @dev ERC20 standard interface does not specify these functions, but
 *      often the token implementations have them.
 */
interface TokenInfo {
    /**
     * @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 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.
     *
     * NOTE: 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 returns (uint8);
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";

interface IERC20Mod is IERC20 {
    function decimals() external view returns (uint8);
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;

import { ISuperToken } from "@superfluid-finance/ethereum-contracts/contracts/interfaces/superfluid/ISuperfluid.sol";

interface IStrategy {

    event Wrapped(
        address indexed user,
        address indexed superToken,
        uint256 superTokenAmount
    );
    event ManagerChanged(
        address indexed oldManager,
        address indexed manager
    );
    event EmergencyWithdrawInitiated(
        address indexed receiver,
        address indexed token,
        uint256 amount
    );

    /// Custom error to indicate that null address has been passed.
    error ZeroAddress();

    /// Custom error to indicate that supertoken provided isn't supported.
    /// @param superToken Address of the supertoken which isn't supported.
    error UnsupportedSuperToken(address superToken);

    /// Custom error to indicate that the caller is unauthorized to call a function.
    /// @param caller Address of the caller of the function.
    /// @param expectedCaller Address of the expected caller of the function.
    error UnauthorizedCaller(address caller, address expectedCaller);

    /// Function to get the current Manager contract which interacts with this contract.
    /// strategy contract.
    /// @return Manager contract address.
    function manager() external returns (address);

    /// Function to wrap schedule an account based on certain conditions pre-defined in the Manager contract.
    /// @param user Address of the user whose account needs to be topped-up.
    /// @param superToken Supertoken which needs to be replenished.
    /// @param superTokenAmount Amount of supertoken to be replenished.
    /// @dev This function assumes whatever given by Manager is correct. Therefore, all the necessary-
    /// checks such as if a wrap schedule is required and if so how much amount needs to be topped up, do we have-
    /// enough allowance to perform a wrap schedule and so on must be performed in Manager only.
    function wrap(
        address user,
        ISuperToken superToken,
        uint256 superTokenAmount
    ) external;

    /// Function to check whether a supertoken is supported by a strategy or not.
    /// @dev More specifically, this function checks whether the underlying token of the supertoken-
    /// is supported or not.
    /// @param superToken Supertoken which needs to be checked for support.
    /// @return Boolean indicating the support of the supertoken.
    function isSupportedSuperToken(ISuperToken superToken)
        external
        view
        returns (bool);

    /// Function to change the Manager contract that a strategy interacts with.
    /// This function can only be called by the owner of the strategy contract.
    /// @param newManager Address of the new Manager contract the strategy should interact with.
    function changeManager(address newManager) external;

    /// Function to withdraw any token locked in the contract in case of an emergency.
    /// Ideally, no tokens should ever be sent directly to the contract but in case it happens,
    /// this function can be used by the owner of the strategy contract to transfer all the locked tokens-
    /// to their address.
    /// @param token Address of the locked token which is to be transferred to the owner address.
    function emergencyWithdraw(address token) external;
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "../interfaces/IERC20Mod.sol";
import "../interfaces/IStrategy.sol";

/// @title Base abstract contract for all strategies.
abstract contract StrategyBase is IStrategy, Ownable {

    using SafeERC20 for IERC20Mod;

    /// @dev IStrategy.manager implementation.
    address public override manager;

    /// @dev IStrategy.changeManager implementation.
    function changeManager(address newManager)
        external
        override
        onlyOwner
    {
        if (newManager == address(0)) revert ZeroAddress();

        emit ManagerChanged(manager, newManager);

        manager = newManager;
    }

    /// @dev IStrategy.emergencyWithdraw implementation.
    function emergencyWithdraw(address token) external override onlyOwner {
        uint256 tokenBalance = IERC20Mod(token).balanceOf(address(this));
        IERC20Mod(token).safeTransfer(msg.sender, tokenBalance);
        emit EmergencyWithdrawInitiated(msg.sender, token, tokenBalance);
    }

    function _toUnderlyingAmount(uint256 amount, uint256 underlyingDecimals)
        internal
        pure
        returns (uint256 underlyingAmount, uint256 adjustedAmount)
    {
        uint256 factor;
        if (underlyingDecimals < 18) {
            // If underlying has less decimals
            // one can upgrade less "granular" amount of tokens
            factor = 10**(18 - underlyingDecimals);
            underlyingAmount = amount / factor;
            // remove precision errors
            adjustedAmount = underlyingAmount * factor;
        } else if (underlyingDecimals > 18) {
            // If underlying has more decimals
            // one can upgrade more "granular" amount of tokens
            factor = 10**(underlyingDecimals - 18);
            underlyingAmount = amount * factor;
            adjustedAmount = amount;
        } else {
            underlyingAmount = adjustedAmount = amount;
        }
    }
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "../interfaces/IERC20Mod.sol";
import "./StrategyBase.sol";

/// @title ERC20 Wrap Strategy contract
contract WrapStrategy is StrategyBase {
    using SafeERC20 for IERC20Mod;
    using SafeERC20 for ISuperToken;

    constructor(address _manager) {
        if (_manager == address(0)) revert ZeroAddress();

        manager = _manager;
    }

    /// @dev IStrategy.wrap implementation.
    function wrap(
        address user,
        ISuperToken superToken,
        uint256 superTokenAmount
    ) external override {
        // Only `Manager` can call this method.
        if (msg.sender != manager)
            revert UnauthorizedCaller(msg.sender, manager);

        IERC20Mod underlyingToken = IERC20Mod(superToken.getUnderlyingToken());

        (
            uint256 underlyingAmount,
            uint256 adjustedAmount
        ) = _toUnderlyingAmount(superTokenAmount, underlyingToken.decimals());

        // Transfer the underlying tokens from the user
        underlyingToken.safeTransferFrom(
            user,
            address(this),
            underlyingAmount
        );

        // Giving the Supertoken max allowance for upgrades if that hasn't been done before.
        // We are checking for this condition as there is a possibility that in the lifetime of this contract,
        // `type(uint256).max` amount of allowance might be consumed (very low probability but still possible).
        // Ideally this statement should not be in this contract but rather in `Manager`. For the sake-
        // of compatibility with the existing deployments, we will not make further changes to `Manager`.
        if (
            underlyingToken.allowance(address(this), address(superToken)) <=
            underlyingAmount
        )
            underlyingToken.safeIncreaseAllowance(
                address(superToken),
                type(uint256).max
            );

        // Upgrade the necessary amount of supertokens and transfer them to a user.
        // We are assuming that `upgrade` function will revert upon failure of supertoken transfer to user.
        // If not, we need to check for the same after calling this method.
        superToken.upgrade(adjustedAmount);
        superToken.safeTransfer(user, adjustedAmount);
        emit Wrapped(user, address(superToken), adjustedAmount);
    }

    /// @dev IStrategy.isSupportedSuperToken implementation.
    function isSupportedSuperToken(ISuperToken superToken)
        public
        view
        override
        returns (bool)
    {
        return superToken.getUnderlyingToken() != address(0);
    }
}