AaveEcosystemReserveController

< // SPDX-License-Identifier: MIT
pragma solidity 0.8.11;

// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)



// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)



/**
 * @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;
    }
}

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

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _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);
    }
}
interface IStreamable {
    struct Stream {
        uint256 deposit;
        uint256 ratePerSecond;
        uint256 remainingBalance;
        uint256 startTime;
        uint256 stopTime;
        address recipient;
        address sender;
        address tokenAddress;
        bool isEntity;
    }

    event CreateStream(
        uint256 indexed streamId,
        address indexed sender,
        address indexed recipient,
        uint256 deposit,
        address tokenAddress,
        uint256 startTime,
        uint256 stopTime
    );

    event WithdrawFromStream(
        uint256 indexed streamId,
        address indexed recipient,
        uint256 amount
    );

    event CancelStream(
        uint256 indexed streamId,
        address indexed sender,
        address indexed recipient,
        uint256 senderBalance,
        uint256 recipientBalance
    );

    function balanceOf(uint256 streamId, address who)
        external
        view
        returns (uint256 balance);

    function getStream(uint256 streamId)
        external
        view
        returns (
            address sender,
            address recipient,
            uint256 deposit,
            address token,
            uint256 startTime,
            uint256 stopTime,
            uint256 remainingBalance,
            uint256 ratePerSecond
        );

    function createStream(
        address recipient,
        uint256 deposit,
        address tokenAddress,
        uint256 startTime,
        uint256 stopTime
    ) external returns (uint256 streamId);

    function withdrawFromStream(uint256 streamId, uint256 funds)
        external
        returns (bool);

    function cancelStream(uint256 streamId) external returns (bool);

    function initialize(address fundsAdmin) external;
}
interface IERC20 {
  /**
   * @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 `recipient`.
   *
   * Returns a boolean value indicating whether the operation succeeded.
   *
   * Emits a {Transfer} event.
   */
  function transfer(address recipient, 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 `sender` to `recipient` 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 sender,
    address recipient,
    uint256 amount
  ) external returns (bool);

  /**
   * @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);
}

interface IAdminControlledEcosystemReserve {
    /** @notice Emitted when the funds admin changes
     * @param fundsAdmin The new funds admin
     **/
    event NewFundsAdmin(address indexed fundsAdmin);

    /** @notice Returns the mock ETH reference address
     * @return address The address
     **/
    function ETH_MOCK_ADDRESS() external pure returns (address);

    /**
     * @notice Return the funds admin, only entity to be able to interact with this contract (controller of reserve)
     * @return address The address of the funds admin
     **/
    function getFundsAdmin() external view returns (address);

    /**
     * @dev Function for the funds admin to give ERC20 allowance to other parties
     * @param token The address of the token to give allowance from
     * @param recipient Allowance's recipient
     * @param amount Allowance to approve
     **/
    function approve(
        IERC20 token,
        address recipient,
        uint256 amount
    ) external;

    /**
     * @notice Function for the funds admin to transfer ERC20 tokens to other parties
     * @param token The address of the token to transfer
     * @param recipient Transfer's recipient
     * @param amount Amount to transfer
     **/
    function transfer(
        IERC20 token,
        address recipient,
        uint256 amount
    ) external;
}
interface IAaveEcosystemReserveController {
    /**
     * @notice Proxy function for ERC20's approve(), pointing to a specific collector contract
     * @param collector The collector contract with funds (Aave ecosystem reserve)
     * @param token The asset address
     * @param recipient Allowance's recipient
     * @param amount Allowance to approve
     **/
    function approve(
        address collector,
        IERC20 token,
        address recipient,
        uint256 amount
    ) external;

    /**
     * @notice Proxy function for ERC20's transfer(), pointing to a specific collector contract
     * @param collector The collector contract with funds (Aave ecosystem reserve)
     * @param token The asset address
     * @param recipient Transfer's recipient
     * @param amount Amount to transfer
     **/
    function transfer(
        address collector,
        IERC20 token,
        address recipient,
        uint256 amount
    ) external;

    /**
     * @notice Proxy function to create a stream of token on a specific collector contract
     * @param collector The collector contract with funds (Aave ecosystem reserve)
     * @param recipient The recipient of the stream of token
     * @param deposit Total amount to be streamed
     * @param tokenAddress The ERC20 token to use as streaming asset
     * @param startTime The unix timestamp for when the stream starts
     * @param stopTime The unix timestamp for when the stream stops
     * @return uint256 The stream id created
     **/
    function createStream(
        address collector,
        address recipient,
        uint256 deposit,
        IERC20 tokenAddress,
        uint256 startTime,
        uint256 stopTime
    ) external returns (uint256);

    /**
     * @notice Proxy function to withdraw from a stream of token on a specific collector contract
     * @param collector The collector contract with funds (Aave ecosystem reserve)
     * @param streamId The id of the stream to withdraw tokens from
     * @param funds Amount to withdraw
     * @return bool If the withdrawal finished properly
     **/
    function withdrawFromStream(
        address collector,
        uint256 streamId,
        uint256 funds
    ) external returns (bool);

    /**
     * @notice Proxy function to cancel a stream of token on a specific collector contract
     * @param collector The collector contract with funds (Aave ecosystem reserve)
     * @param streamId The id of the stream to cancel
     * @return bool If the cancellation happened correctly
     **/
    function cancelStream(address collector, uint256 streamId)
        external
        returns (bool);
}


contract AaveEcosystemReserveController is
    Ownable,
    IAaveEcosystemReserveController
{
    /**
     * @notice Constructor.
     * @param aaveGovShortTimelock The address of the Aave's governance executor, owning this contract
     */
    constructor(address aaveGovShortTimelock) {
        transferOwnership(aaveGovShortTimelock);
    }

    /// @inheritdoc IAaveEcosystemReserveController
    function approve(
        address collector,
        IERC20 token,
        address recipient,
        uint256 amount
    ) external onlyOwner {
        IAdminControlledEcosystemReserve(collector).approve(
            token,
            recipient,
            amount
        );
    }

    /// @inheritdoc IAaveEcosystemReserveController
    function transfer(
        address collector,
        IERC20 token,
        address recipient,
        uint256 amount
    ) external onlyOwner {
        IAdminControlledEcosystemReserve(collector).transfer(
            token,
            recipient,
            amount
        );
    }

    /// @inheritdoc IAaveEcosystemReserveController
    function createStream(
        address collector,
        address recipient,
        uint256 deposit,
        IERC20 tokenAddress,
        uint256 startTime,
        uint256 stopTime
    ) external onlyOwner returns (uint256) {
        return
            IStreamable(collector).createStream(
                recipient,
                deposit,
                address(tokenAddress),
                startTime,
                stopTime
            );
    }

    /// @inheritdoc IAaveEcosystemReserveController
    function withdrawFromStream(
        address collector,
        uint256 streamId,
        uint256 funds
    ) external onlyOwner returns (bool) {
        return IStreamable(collector).withdrawFromStream(streamId, funds);
    }

    /// @inheritdoc IAaveEcosystemReserveController
    function cancelStream(address collector, uint256 streamId)
        external
        onlyOwner
        returns (bool)
    {
        return IStreamable(collector).cancelStream(streamId);
    }
} <