// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        uint256 c = a + b;
        if (c < a) return (false, 0);
        return (true, c);
    }
    /**
     * @dev Returns the substraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b > a) return (false, 0);
        return (true, a - b);
    }
    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) return (true, 0);
        uint256 c = a * b;
        if (c / a != b) return (false, 0);
        return (true, c);
    }
    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b == 0) return (false, 0);
        return (true, a / b);
    }
    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b == 0) return (false, 0);
        return (true, a % b);
    }
    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");
        return c;
    }
    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b <= a, "SafeMath: subtraction overflow");
        return a - b;
    }
    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) return 0;
        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");
        return c;
    }
    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b > 0, "SafeMath: division by zero");
        return a / b;
    }
    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b > 0, "SafeMath: modulo by zero");
        return a % b;
    }
    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        return a - b;
    }
    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryDiv}.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        return a / b;
    }
    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        return a % b;
    }
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../../utils/Context.sol";
import "./IERC20.sol";
import "../../math/SafeMath.sol";
/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20PresetMinterPauser}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * We have followed general OpenZeppelin guidelines: functions revert instead
 * of returning `false` on failure. This behavior is nonetheless conventional
 * and does not conflict with the expectations of ERC20 applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
contract ERC20 is Context, IERC20 {
    using SafeMath for uint256;
    mapping (address => uint256) private _balances;
    mapping (address => mapping (address => uint256)) private _allowances;
    uint256 private _totalSupply;
    string private _name;
    string private _symbol;
    uint8 private _decimals;
    /**
     * @dev Sets the values for {name} and {symbol}, initializes {decimals} with
     * a default value of 18.
     *
     * To select a different value for {decimals}, use {_setupDecimals}.
     *
     * All three of these values are immutable: they can only be set once during
     * construction.
     */
    constructor (string memory name_, string memory symbol_) public {
        _name = name_;
        _symbol = symbol_;
        _decimals = 18;
    }
    /**
     * @dev Returns the name of the token.
     */
    function name() public view virtual returns (string memory) {
        return _name;
    }
    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual returns (string memory) {
        return _symbol;
    }
    /**
     * @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() public view virtual returns (uint8) {
        return _decimals;
    }
    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }
    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view virtual override returns (uint256) {
        return _balances[account];
    }
    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `recipient` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }
    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }
    /**
     * @dev See {IERC20-approve}.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }
    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * Requirements:
     *
     * - `sender` and `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     * - the caller must have allowance for ``sender``'s tokens of at least
     * `amount`.
     */
    function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
        return true;
    }
    /**
     * @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}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
        return true;
    }
    /**
     * @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}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
        return true;
    }
    /**
     * @dev Moves tokens `amount` from `sender` to `recipient`.
     *
     * This is internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `sender` cannot be the zero address.
     * - `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     */
    function _transfer(address sender, address recipient, uint256 amount) internal virtual {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");
        _beforeTokenTransfer(sender, recipient, amount);
        _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
        _balances[recipient] = _balances[recipient].add(amount);
        emit Transfer(sender, recipient, amount);
    }
    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");
        _beforeTokenTransfer(address(0), account, amount);
        _totalSupply = _totalSupply.add(amount);
        _balances[account] = _balances[account].add(amount);
        emit Transfer(address(0), account, amount);
    }
    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");
        _beforeTokenTransfer(account, address(0), amount);
        _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
        _totalSupply = _totalSupply.sub(amount);
        emit Transfer(account, address(0), amount);
    }
    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(address owner, address spender, uint256 amount) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");
        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }
    /**
     * @dev Sets {decimals} to a value other than the default one of 18.
     *
     * WARNING: This function should only be called from the constructor. Most
     * applications that interact with token contracts will not expect
     * {decimals} to ever change, and may work incorrectly if it does.
     */
    function _setupDecimals(uint8 decimals_) internal virtual {
        _decimals = decimals_;
    }
    /**
     * @dev Hook that is called before any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * will be to transferred to `to`.
     * - when `from` is zero, `amount` tokens will be minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
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);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <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 GSN 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 payable) {
        return msg.sender;
    }
    function _msgData() internal view virtual returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}
/**
  *       .
  *      / \\
  *     |.'.|
  *     |'.'|
  *   ,'|   |`.
  *  |,-'-|-'-.|
  *   __|_| |         _        _      _____           _
  *  | ___ \\|        | |      | |    | ___ \\         | |
  *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
  *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
  *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
  *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
  * +---------------------------------------------------+
  * |    DECENTRALISED STAKING PROTOCOL FOR ETHEREUM    |
  * +---------------------------------------------------+
  *
  *  Rocket Pool is a first-of-its-kind Ethereum staking pool protocol, designed to
  *  be community-owned, decentralised, and trustless.
  *
  *  For more information about Rocket Pool, visit https://rocketpool.net
  *
  *  Authors: David Rugendyke, Jake Pospischil, Kane Wallmann, Darren Langley, Joe Clapis, Nick Doherty
  *
  */
pragma solidity 0.7.6;
// SPDX-License-Identifier: GPL-3.0-only
import "../interface/RocketStorageInterface.sol";
/// @title Base settings / modifiers for each contract in Rocket Pool
/// @author David Rugendyke
abstract contract RocketBase {
    // Calculate using this as the base
    uint256 constant calcBase = 1 ether;
    // Version of the contract
    uint8 public version;
    // The main storage contract where primary persistant storage is maintained
    RocketStorageInterface rocketStorage = RocketStorageInterface(0);
    /*** Modifiers **********************************************************/
    /**
    * @dev Throws if called by any sender that doesn't match a Rocket Pool network contract
    */
    modifier onlyLatestNetworkContract() {
        require(getBool(keccak256(abi.encodePacked("contract.exists", msg.sender))), "Invalid or outdated network contract");
        _;
    }
    /**
    * @dev Throws if called by any sender that doesn't match one of the supplied contract or is the latest version of that contract
    */
    modifier onlyLatestContract(string memory _contractName, address _contractAddress) {
        require(_contractAddress == getAddress(keccak256(abi.encodePacked("contract.address", _contractName))), "Invalid or outdated contract");
        _;
    }
    /**
    * @dev Throws if called by any sender that isn't a registered node
    */
    modifier onlyRegisteredNode(address _nodeAddress) {
        require(getBool(keccak256(abi.encodePacked("node.exists", _nodeAddress))), "Invalid node");
        _;
    }
    /**
    * @dev Throws if called by any sender that isn't a trusted node DAO member
    */
    modifier onlyTrustedNode(address _nodeAddress) {
        require(getBool(keccak256(abi.encodePacked("dao.trustednodes.", "member", _nodeAddress))), "Invalid trusted node");
        _;
    }
    /**
    * @dev Throws if called by any sender that isn't a registered minipool
    */
    modifier onlyRegisteredMinipool(address _minipoolAddress) {
        require(getBool(keccak256(abi.encodePacked("minipool.exists", _minipoolAddress))), "Invalid minipool");
        _;
    }
    
    /**
    * @dev Throws if called by any account other than a guardian account (temporary account allowed access to settings before DAO is fully enabled)
    */
    modifier onlyGuardian() {
        require(msg.sender == rocketStorage.getGuardian(), "Account is not a temporary guardian");
        _;
    }
    /*** Methods **********************************************************/
    /// @dev Set the main Rocket Storage address
    constructor(RocketStorageInterface _rocketStorageAddress) {
        // Update the contract address
        rocketStorage = RocketStorageInterface(_rocketStorageAddress);
    }
    /// @dev Get the address of a network contract by name
    function getContractAddress(string memory _contractName) internal view returns (address) {
        // Get the current contract address
        address contractAddress = getAddress(keccak256(abi.encodePacked("contract.address", _contractName)));
        // Check it
        require(contractAddress != address(0x0), "Contract not found");
        // Return
        return contractAddress;
    }
    /// @dev Get the address of a network contract by name (returns address(0x0) instead of reverting if contract does not exist)
    function getContractAddressUnsafe(string memory _contractName) internal view returns (address) {
        // Get the current contract address
        address contractAddress = getAddress(keccak256(abi.encodePacked("contract.address", _contractName)));
        // Return
        return contractAddress;
    }
    /// @dev Get the name of a network contract by address
    function getContractName(address _contractAddress) internal view returns (string memory) {
        // Get the contract name
        string memory contractName = getString(keccak256(abi.encodePacked("contract.name", _contractAddress)));
        // Check it
        require(bytes(contractName).length > 0, "Contract not found");
        // Return
        return contractName;
    }
    /// @dev Get revert error message from a .call method
    function getRevertMsg(bytes memory _returnData) internal pure returns (string memory) {
        // If the _res length is less than 68, then the transaction failed silently (without a revert message)
        if (_returnData.length < 68) return "Transaction reverted silently";
        assembly {
            // Slice the sighash.
            _returnData := add(_returnData, 0x04)
        }
        return abi.decode(_returnData, (string)); // All that remains is the revert string
    }
    /*** Rocket Storage Methods ****************************************/
    // Note: Unused helpers have been removed to keep contract sizes down
    /// @dev Storage get methods
    function getAddress(bytes32 _key) internal view returns (address) { return rocketStorage.getAddress(_key); }
    function getUint(bytes32 _key) internal view returns (uint) { return rocketStorage.getUint(_key); }
    function getString(bytes32 _key) internal view returns (string memory) { return rocketStorage.getString(_key); }
    function getBytes(bytes32 _key) internal view returns (bytes memory) { return rocketStorage.getBytes(_key); }
    function getBool(bytes32 _key) internal view returns (bool) { return rocketStorage.getBool(_key); }
    function getInt(bytes32 _key) internal view returns (int) { return rocketStorage.getInt(_key); }
    function getBytes32(bytes32 _key) internal view returns (bytes32) { return rocketStorage.getBytes32(_key); }
    /// @dev Storage set methods
    function setAddress(bytes32 _key, address _value) internal { rocketStorage.setAddress(_key, _value); }
    function setUint(bytes32 _key, uint _value) internal { rocketStorage.setUint(_key, _value); }
    function setString(bytes32 _key, string memory _value) internal { rocketStorage.setString(_key, _value); }
    function setBytes(bytes32 _key, bytes memory _value) internal { rocketStorage.setBytes(_key, _value); }
    function setBool(bytes32 _key, bool _value) internal { rocketStorage.setBool(_key, _value); }
    function setInt(bytes32 _key, int _value) internal { rocketStorage.setInt(_key, _value); }
    function setBytes32(bytes32 _key, bytes32 _value) internal { rocketStorage.setBytes32(_key, _value); }
    /// @dev Storage delete methods
    function deleteAddress(bytes32 _key) internal { rocketStorage.deleteAddress(_key); }
    function deleteUint(bytes32 _key) internal { rocketStorage.deleteUint(_key); }
    function deleteString(bytes32 _key) internal { rocketStorage.deleteString(_key); }
    function deleteBytes(bytes32 _key) internal { rocketStorage.deleteBytes(_key); }
    function deleteBool(bytes32 _key) internal { rocketStorage.deleteBool(_key); }
    function deleteInt(bytes32 _key) internal { rocketStorage.deleteInt(_key); }
    function deleteBytes32(bytes32 _key) internal { rocketStorage.deleteBytes32(_key); }
    /// @dev Storage arithmetic methods
    function addUint(bytes32 _key, uint256 _amount) internal { rocketStorage.addUint(_key, _amount); }
    function subUint(bytes32 _key, uint256 _amount) internal { rocketStorage.subUint(_key, _amount); }
}
/**
  *       .
  *      / \\
  *     |.'.|
  *     |'.'|
  *   ,'|   |`.
  *  |,-'-|-'-.|
  *   __|_| |         _        _      _____           _
  *  | ___ \\|        | |      | |    | ___ \\         | |
  *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
  *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
  *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
  *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
  * +---------------------------------------------------+
  * |    DECENTRALISED STAKING PROTOCOL FOR ETHEREUM    |
  * +---------------------------------------------------+
  *
  *  Rocket Pool is a first-of-its-kind Ethereum staking pool protocol, designed to
  *  be community-owned, decentralised, and trustless.
  *
  *  For more information about Rocket Pool, visit https://rocketpool.net
  *
  *  Authors: David Rugendyke, Jake Pospischil, Kane Wallmann, Darren Langley, Joe Clapis, Nick Doherty
  *
  */
pragma solidity 0.7.6;
// SPDX-License-Identifier: GPL-3.0-only
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "../RocketBase.sol";
import "../../interface/deposit/RocketDepositPoolInterface.sol";
import "../../interface/network/RocketNetworkBalancesInterface.sol";
import "../../interface/token/RocketTokenRETHInterface.sol";
import "../../interface/dao/protocol/settings/RocketDAOProtocolSettingsNetworkInterface.sol";
// rETH is a tokenised stake in the Rocket Pool network
// rETH is backed by ETH (subject to liquidity) at a variable exchange rate
contract RocketTokenRETH is RocketBase, ERC20, RocketTokenRETHInterface {
    // Libs
    using SafeMath for uint;
    // Events
    event EtherDeposited(address indexed from, uint256 amount, uint256 time);
    event TokensMinted(address indexed to, uint256 amount, uint256 ethAmount, uint256 time);
    event TokensBurned(address indexed from, uint256 amount, uint256 ethAmount, uint256 time);
    // Construct with our token details
    constructor(RocketStorageInterface _rocketStorageAddress) RocketBase(_rocketStorageAddress) ERC20("Rocket Pool ETH", "rETH") {
        // Version
        version = 1;
    }
    // Receive an ETH deposit from a minipool or generous individual
    receive() external payable {
        // Emit ether deposited event
        emit EtherDeposited(msg.sender, msg.value, block.timestamp);
    }
    // Calculate the amount of ETH backing an amount of rETH
    function getEthValue(uint256 _rethAmount) override public view returns (uint256) {
        // Get network balances
        RocketNetworkBalancesInterface rocketNetworkBalances = RocketNetworkBalancesInterface(getContractAddress("rocketNetworkBalances"));
        uint256 totalEthBalance = rocketNetworkBalances.getTotalETHBalance();
        uint256 rethSupply = rocketNetworkBalances.getTotalRETHSupply();
        // Use 1:1 ratio if no rETH is minted
        if (rethSupply == 0) { return _rethAmount; }
        // Calculate and return
        return _rethAmount.mul(totalEthBalance).div(rethSupply);
    }
    // Calculate the amount of rETH backed by an amount of ETH
    function getRethValue(uint256 _ethAmount) override public view returns (uint256) {
        // Get network balances
        RocketNetworkBalancesInterface rocketNetworkBalances = RocketNetworkBalancesInterface(getContractAddress("rocketNetworkBalances"));
        uint256 totalEthBalance = rocketNetworkBalances.getTotalETHBalance();
        uint256 rethSupply = rocketNetworkBalances.getTotalRETHSupply();
        // Use 1:1 ratio if no rETH is minted
        if (rethSupply == 0) { return _ethAmount; }
        // Check network ETH balance
        require(totalEthBalance > 0, "Cannot calculate rETH token amount while total network balance is zero");
        // Calculate and return
        return _ethAmount.mul(rethSupply).div(totalEthBalance);
    }
    // Get the current ETH : rETH exchange rate
    // Returns the amount of ETH backing 1 rETH
    function getExchangeRate() override external view returns (uint256) {
        return getEthValue(1 ether);
    }
    // Get the total amount of collateral available
    // Includes rETH contract balance & excess deposit pool balance
    function getTotalCollateral() override public view returns (uint256) {
        RocketDepositPoolInterface rocketDepositPool = RocketDepositPoolInterface(getContractAddress("rocketDepositPool"));
        return rocketDepositPool.getExcessBalance().add(address(this).balance);
    }
    // Get the current ETH collateral rate
    // Returns the portion of rETH backed by ETH in the contract as a fraction of 1 ether
    function getCollateralRate() override public view returns (uint256) {
        uint256 totalEthValue = getEthValue(totalSupply());
        if (totalEthValue == 0) { return calcBase; }
        return calcBase.mul(address(this).balance).div(totalEthValue);
    }
    // Deposit excess ETH from deposit pool
    // Only accepts calls from the RocketDepositPool contract
    function depositExcess() override external payable onlyLatestContract("rocketDepositPool", msg.sender) {
        // Emit ether deposited event
        emit EtherDeposited(msg.sender, msg.value, block.timestamp);
    }
    // Mint rETH
    // Only accepts calls from the RocketDepositPool contract
    function mint(uint256 _ethAmount, address _to) override external onlyLatestContract("rocketDepositPool", msg.sender) {
        // Get rETH amount
        uint256 rethAmount = getRethValue(_ethAmount);
        // Check rETH amount
        require(rethAmount > 0, "Invalid token mint amount");
        // Update balance & supply
        _mint(_to, rethAmount);
        // Emit tokens minted event
        emit TokensMinted(_to, rethAmount, _ethAmount, block.timestamp);
    }
    // Burn rETH for ETH
    function burn(uint256 _rethAmount) override external {
        // Check rETH amount
        require(_rethAmount > 0, "Invalid token burn amount");
        require(balanceOf(msg.sender) >= _rethAmount, "Insufficient rETH balance");
        // Get ETH amount
        uint256 ethAmount = getEthValue(_rethAmount);
        // Get & check ETH balance
        uint256 ethBalance = getTotalCollateral();
        require(ethBalance >= ethAmount, "Insufficient ETH balance for exchange");
        // Update balance & supply
        _burn(msg.sender, _rethAmount);
        // Withdraw ETH from deposit pool if required
        withdrawDepositCollateral(ethAmount);
        // Transfer ETH to sender
        msg.sender.transfer(ethAmount);
        // Emit tokens burned event
        emit TokensBurned(msg.sender, _rethAmount, ethAmount, block.timestamp);
    }
    // Withdraw ETH from the deposit pool for collateral if required
    function withdrawDepositCollateral(uint256 _ethRequired) private {
        // Check rETH contract balance
        uint256 ethBalance = address(this).balance;
        if (ethBalance >= _ethRequired) { return; }
        // Withdraw
        RocketDepositPoolInterface rocketDepositPool = RocketDepositPoolInterface(getContractAddress("rocketDepositPool"));
        rocketDepositPool.withdrawExcessBalance(_ethRequired.sub(ethBalance));
    }
    // Sends any excess ETH from this contract to the deposit pool (as determined by target collateral rate)
    function depositExcessCollateral() external override {
        // Load contracts
        RocketDAOProtocolSettingsNetworkInterface rocketDAOProtocolSettingsNetwork = RocketDAOProtocolSettingsNetworkInterface(getContractAddress("rocketDAOProtocolSettingsNetwork"));
        RocketDepositPoolInterface rocketDepositPool = RocketDepositPoolInterface(getContractAddress("rocketDepositPool"));
        // Get collateral and target collateral rate
        uint256 collateralRate = getCollateralRate();
        uint256 targetCollateralRate = rocketDAOProtocolSettingsNetwork.getTargetRethCollateralRate();
        // Check if we are in excess
        if (collateralRate > targetCollateralRate) {
            // Calculate our target collateral in ETH
            uint256 targetCollateral = address(this).balance.mul(targetCollateralRate).div(collateralRate);
            // If we have excess
            if (address(this).balance > targetCollateral) {
                // Send that excess to deposit pool
                uint256 excessCollateral = address(this).balance.sub(targetCollateral);
                rocketDepositPool.recycleExcessCollateral{value: excessCollateral}();
            }
        }
    }
    // This is called by the base ERC20 contract before all transfer, mint, and burns
    function _beforeTokenTransfer(address from, address, uint256) internal override {
        // Don't run check if this is a mint transaction
        if (from != address(0)) {
            // Check which block the user's last deposit was
            bytes32 key = keccak256(abi.encodePacked("user.deposit.block", from));
            uint256 lastDepositBlock = getUint(key);
            if (lastDepositBlock > 0) {
                // Ensure enough blocks have passed
                uint256 depositDelay = getUint(keccak256(abi.encodePacked(keccak256("dao.protocol.setting.network"), "network.reth.deposit.delay")));
                uint256 blocksPassed = block.number.sub(lastDepositBlock);
                require(blocksPassed > depositDelay, "Not enough time has passed since deposit");
                // Clear the state as it's no longer necessary to check this until another deposit is made
                deleteUint(key);
            }
        }
    }
}
/**
  *       .
  *      / \\
  *     |.'.|
  *     |'.'|
  *   ,'|   |`.
  *  |,-'-|-'-.|
  *   __|_| |         _        _      _____           _
  *  | ___ \\|        | |      | |    | ___ \\         | |
  *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
  *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
  *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
  *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
  * +---------------------------------------------------+
  * |    DECENTRALISED STAKING PROTOCOL FOR ETHEREUM    |
  * +---------------------------------------------------+
  *
  *  Rocket Pool is a first-of-its-kind Ethereum staking pool protocol, designed to
  *  be community-owned, decentralised, and trustless.
  *
  *  For more information about Rocket Pool, visit https://rocketpool.net
  *
  *  Authors: David Rugendyke, Jake Pospischil, Kane Wallmann, Darren Langley, Joe Clapis, Nick Doherty
  *
  */
pragma solidity 0.7.6;
// SPDX-License-Identifier: GPL-3.0-only
interface RocketStorageInterface {
    // Deploy status
    function getDeployedStatus() external view returns (bool);
    // Guardian
    function getGuardian() external view returns(address);
    function setGuardian(address _newAddress) external;
    function confirmGuardian() external;
    // Getters
    function getAddress(bytes32 _key) external view returns (address);
    function getUint(bytes32 _key) external view returns (uint);
    function getString(bytes32 _key) external view returns (string memory);
    function getBytes(bytes32 _key) external view returns (bytes memory);
    function getBool(bytes32 _key) external view returns (bool);
    function getInt(bytes32 _key) external view returns (int);
    function getBytes32(bytes32 _key) external view returns (bytes32);
    // Setters
    function setAddress(bytes32 _key, address _value) external;
    function setUint(bytes32 _key, uint _value) external;
    function setString(bytes32 _key, string calldata _value) external;
    function setBytes(bytes32 _key, bytes calldata _value) external;
    function setBool(bytes32 _key, bool _value) external;
    function setInt(bytes32 _key, int _value) external;
    function setBytes32(bytes32 _key, bytes32 _value) external;
    // Deleters
    function deleteAddress(bytes32 _key) external;
    function deleteUint(bytes32 _key) external;
    function deleteString(bytes32 _key) external;
    function deleteBytes(bytes32 _key) external;
    function deleteBool(bytes32 _key) external;
    function deleteInt(bytes32 _key) external;
    function deleteBytes32(bytes32 _key) external;
    // Arithmetic
    function addUint(bytes32 _key, uint256 _amount) external;
    function subUint(bytes32 _key, uint256 _amount) external;
    // Protected storage
    function getNodeWithdrawalAddress(address _nodeAddress) external view returns (address);
    function getNodePendingWithdrawalAddress(address _nodeAddress) external view returns (address);
    function setWithdrawalAddress(address _nodeAddress, address _newWithdrawalAddress, bool _confirm) external;
    function confirmWithdrawalAddress(address _nodeAddress) external;
}
/**
  *       .
  *      / \\
  *     |.'.|
  *     |'.'|
  *   ,'|   |`.
  *  |,-'-|-'-.|
  *   __|_| |         _        _      _____           _
  *  | ___ \\|        | |      | |    | ___ \\         | |
  *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
  *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
  *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
  *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
  * +---------------------------------------------------+
  * |    DECENTRALISED STAKING PROTOCOL FOR ETHEREUM    |
  * +---------------------------------------------------+
  *
  *  Rocket Pool is a first-of-its-kind Ethereum staking pool protocol, designed to
  *  be community-owned, decentralised, and trustless.
  *
  *  For more information about Rocket Pool, visit https://rocketpool.net
  *
  *  Authors: David Rugendyke, Jake Pospischil, Kane Wallmann, Darren Langley, Joe Clapis, Nick Doherty
  *
  */
pragma solidity 0.7.6;
// SPDX-License-Identifier: GPL-3.0-only
interface RocketDAOProtocolSettingsNetworkInterface {
    function getNodeConsensusThreshold() external view returns (uint256);
    function getSubmitBalancesEnabled() external view returns (bool);
    function getSubmitBalancesFrequency() external view returns (uint256);
    function getSubmitPricesEnabled() external view returns (bool);
    function getSubmitPricesFrequency() external view returns (uint256);
    function getMinimumNodeFee() external view returns (uint256);
    function getTargetNodeFee() external view returns (uint256);
    function getMaximumNodeFee() external view returns (uint256);
    function getNodeFeeDemandRange() external view returns (uint256);
    function getTargetRethCollateralRate() external view returns (uint256);
    function getRethDepositDelay() external view returns (uint256);
}
/**
  *       .
  *      / \\
  *     |.'.|
  *     |'.'|
  *   ,'|   |`.
  *  |,-'-|-'-.|
  *   __|_| |         _        _      _____           _
  *  | ___ \\|        | |      | |    | ___ \\         | |
  *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
  *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
  *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
  *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
  * +---------------------------------------------------+
  * |    DECENTRALISED STAKING PROTOCOL FOR ETHEREUM    |
  * +---------------------------------------------------+
  *
  *  Rocket Pool is a first-of-its-kind Ethereum staking pool protocol, designed to
  *  be community-owned, decentralised, and trustless.
  *
  *  For more information about Rocket Pool, visit https://rocketpool.net
  *
  *  Authors: David Rugendyke, Jake Pospischil, Kane Wallmann, Darren Langley, Joe Clapis, Nick Doherty
  *
  */
pragma solidity 0.7.6;
// SPDX-License-Identifier: GPL-3.0-only
interface RocketDepositPoolInterface {
    function getBalance() external view returns (uint256);
    function getExcessBalance() external view returns (uint256);
    function deposit() external payable;
    function recycleDissolvedDeposit() external payable;
    function recycleExcessCollateral() external payable;
    function recycleLiquidatedStake() external payable;
    function assignDeposits() external;
    function withdrawExcessBalance(uint256 _amount) external;
    function getUserLastDepositBlock(address _address) external view returns (uint256);
}
/**
  *       .
  *      / \\
  *     |.'.|
  *     |'.'|
  *   ,'|   |`.
  *  |,-'-|-'-.|
  *   __|_| |         _        _      _____           _
  *  | ___ \\|        | |      | |    | ___ \\         | |
  *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
  *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
  *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
  *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
  * +---------------------------------------------------+
  * |    DECENTRALISED STAKING PROTOCOL FOR ETHEREUM    |
  * +---------------------------------------------------+
  *
  *  Rocket Pool is a first-of-its-kind Ethereum staking pool protocol, designed to
  *  be community-owned, decentralised, and trustless.
  *
  *  For more information about Rocket Pool, visit https://rocketpool.net
  *
  *  Authors: David Rugendyke, Jake Pospischil, Kane Wallmann, Darren Langley, Joe Clapis, Nick Doherty
  *
  */
pragma solidity 0.7.6;
// SPDX-License-Identifier: GPL-3.0-only
interface RocketNetworkBalancesInterface {
    function getBalancesBlock() external view returns (uint256);
    function getLatestReportableBlock() external view returns (uint256);
    function getTotalETHBalance() external view returns (uint256);
    function getStakingETHBalance() external view returns (uint256);
    function getTotalRETHSupply() external view returns (uint256);
    function getETHUtilizationRate() external view returns (uint256);
    function submitBalances(uint256 _block, uint256 _total, uint256 _staking, uint256 _rethSupply) external;
    function executeUpdateBalances(uint256 _block, uint256 _totalEth, uint256 _stakingEth, uint256 _rethSupply) external;
}
/**
  *       .
  *      / \\
  *     |.'.|
  *     |'.'|
  *   ,'|   |`.
  *  |,-'-|-'-.|
  *   __|_| |         _        _      _____           _
  *  | ___ \\|        | |      | |    | ___ \\         | |
  *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
  *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
  *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
  *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
  * +---------------------------------------------------+
  * |    DECENTRALISED STAKING PROTOCOL FOR ETHEREUM    |
  * +---------------------------------------------------+
  *
  *  Rocket Pool is a first-of-its-kind Ethereum staking pool protocol, designed to
  *  be community-owned, decentralised, and trustless.
  *
  *  For more information about Rocket Pool, visit https://rocketpool.net
  *
  *  Authors: David Rugendyke, Jake Pospischil, Kane Wallmann, Darren Langley, Joe Clapis, Nick Doherty
  *
  */
pragma solidity 0.7.6;
// SPDX-License-Identifier: GPL-3.0-only
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
interface RocketTokenRETHInterface is IERC20 {
    function getEthValue(uint256 _rethAmount) external view returns (uint256);
    function getRethValue(uint256 _ethAmount) external view returns (uint256);
    function getExchangeRate() external view returns (uint256);
    function getTotalCollateral() external view returns (uint256);
    function getCollateralRate() external view returns (uint256);
    function depositExcess() external payable;
    function depositExcessCollateral() external;
    function mint(uint256 _ethAmount, address _to) external;
    function burn(uint256 _rethAmount) external;
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        uint256 c = a + b;
        if (c < a) return (false, 0);
        return (true, c);
    }
    /**
     * @dev Returns the substraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b > a) return (false, 0);
        return (true, a - b);
    }
    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) return (true, 0);
        uint256 c = a * b;
        if (c / a != b) return (false, 0);
        return (true, c);
    }
    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b == 0) return (false, 0);
        return (true, a / b);
    }
    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b == 0) return (false, 0);
        return (true, a % b);
    }
    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");
        return c;
    }
    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b <= a, "SafeMath: subtraction overflow");
        return a - b;
    }
    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) return 0;
        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");
        return c;
    }
    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b > 0, "SafeMath: division by zero");
        return a / b;
    }
    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b > 0, "SafeMath: modulo by zero");
        return a % b;
    }
    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        return a - b;
    }
    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryDiv}.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        return a / b;
    }
    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        return a % b;
    }
}
/**
  *       .
  *      / \\
  *     |.'.|
  *     |'.'|
  *   ,'|   |`.
  *  |,-'-|-'-.|
  *   __|_| |         _        _      _____           _
  *  | ___ \\|        | |      | |    | ___ \\         | |
  *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
  *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
  *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
  *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
  * +---------------------------------------------------+
  * |    DECENTRALISED STAKING PROTOCOL FOR ETHEREUM    |
  * +---------------------------------------------------+
  *
  *  Rocket Pool is a first-of-its-kind Ethereum staking pool protocol, designed to
  *  be community-owned, decentralised, and trustless.
  *
  *  For more information about Rocket Pool, visit https://rocketpool.net
  *
  *  Authors: David Rugendyke, Jake Pospischil, Kane Wallmann, Darren Langley, Joe Clapis, Nick Doherty
  *
  */
pragma solidity 0.7.6;
// SPDX-License-Identifier: GPL-3.0-only
import "../interface/RocketStorageInterface.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
/// @title The primary persistent storage for Rocket Pool
/// @author David Rugendyke
contract RocketStorage is RocketStorageInterface {
    // Events
    event NodeWithdrawalAddressSet(address indexed node, address indexed withdrawalAddress, uint256 time);
    event GuardianChanged(address oldGuardian, address newGuardian);
    // Libraries
    using SafeMath for uint256;
    // Storage maps
    mapping(bytes32 => string)     private stringStorage;
    mapping(bytes32 => bytes)      private bytesStorage;
    mapping(bytes32 => uint256)    private uintStorage;
    mapping(bytes32 => int256)     private intStorage;
    mapping(bytes32 => address)    private addressStorage;
    mapping(bytes32 => bool)       private booleanStorage;
    mapping(bytes32 => bytes32)    private bytes32Storage;
    // Protected storage (not accessible by network contracts)
    mapping(address => address)    private withdrawalAddresses;
    mapping(address => address)    private pendingWithdrawalAddresses;
    // Guardian address
    address guardian;
    address newGuardian;
    // Flag storage has been initialised
    bool storageInit = false;
    /// @dev Only allow access from the latest version of a contract in the Rocket Pool network after deployment
    modifier onlyLatestRocketNetworkContract() {
        if (storageInit == true) {
            // Make sure the access is permitted to only contracts in our Dapp
            require(booleanStorage[keccak256(abi.encodePacked("contract.exists", msg.sender))], "Invalid or outdated network contract");
        } else {
            // Only Dapp and the guardian account are allowed access during initialisation.
            // tx.origin is only safe to use in this case for deployment since no external contracts are interacted with
            require((
                booleanStorage[keccak256(abi.encodePacked("contract.exists", msg.sender))] || tx.origin == guardian
            ), "Invalid or outdated network contract attempting access during deployment");
        }
        _;
    }
    /// @dev Construct RocketStorage
    constructor() {
        // Set the guardian upon deployment
        guardian = msg.sender;
    }
    // Get guardian address
    function getGuardian() external override view returns (address) {
        return guardian;
    }
    // Transfers guardianship to a new address
    function setGuardian(address _newAddress) external override {
        // Check tx comes from current guardian
        require(msg.sender == guardian, "Is not guardian account");
        // Store new address awaiting confirmation
        newGuardian = _newAddress;
    }
    // Confirms change of guardian
    function confirmGuardian() external override {
        // Check tx came from new guardian address
        require(msg.sender == newGuardian, "Confirmation must come from new guardian address");
        // Store old guardian for event
        address oldGuardian = guardian;
        // Update guardian and clear storage
        guardian = newGuardian;
        delete newGuardian;
        // Emit event
        emit GuardianChanged(oldGuardian, guardian);
    }
    // Set this as being deployed now
    function getDeployedStatus() external override view returns (bool) {
        return storageInit;
    }
    // Set this as being deployed now
    function setDeployedStatus() external {
        // Only guardian can lock this down
        require(msg.sender == guardian, "Is not guardian account");
        // Set it now
        storageInit = true;
    }
    // Protected storage
    // Get a node's withdrawal address
    function getNodeWithdrawalAddress(address _nodeAddress) public override view returns (address) {
        // If no withdrawal address has been set, return the nodes address
        address withdrawalAddress = withdrawalAddresses[_nodeAddress];
        if (withdrawalAddress == address(0)) {
            return _nodeAddress;
        }
        return withdrawalAddress;
    }
    // Get a node's pending withdrawal address
    function getNodePendingWithdrawalAddress(address _nodeAddress) external override view returns (address) {
        return pendingWithdrawalAddresses[_nodeAddress];
    }
    // Set a node's withdrawal address
    function setWithdrawalAddress(address _nodeAddress, address _newWithdrawalAddress, bool _confirm) external override {
        // Check new withdrawal address
        require(_newWithdrawalAddress != address(0x0), "Invalid withdrawal address");
        // Confirm the transaction is from the node's current withdrawal address
        address withdrawalAddress = getNodeWithdrawalAddress(_nodeAddress);
        require(withdrawalAddress == msg.sender, "Only a tx from a node's withdrawal address can update it");
        // Update immediately if confirmed
        if (_confirm) {
            updateWithdrawalAddress(_nodeAddress, _newWithdrawalAddress);
        }
        // Set pending withdrawal address if not confirmed
        else {
            pendingWithdrawalAddresses[_nodeAddress] = _newWithdrawalAddress;
        }
    }
    // Confirm a node's new withdrawal address
    function confirmWithdrawalAddress(address _nodeAddress) external override {
        // Get node by pending withdrawal address
        require(pendingWithdrawalAddresses[_nodeAddress] == msg.sender, "Confirmation must come from the pending withdrawal address");
        delete pendingWithdrawalAddresses[_nodeAddress];
        // Update withdrawal address
        updateWithdrawalAddress(_nodeAddress, msg.sender);
    }
    // Update a node's withdrawal address
    function updateWithdrawalAddress(address _nodeAddress, address _newWithdrawalAddress) private {
        // Set new withdrawal address
        withdrawalAddresses[_nodeAddress] = _newWithdrawalAddress;
        // Emit withdrawal address set event
        emit NodeWithdrawalAddressSet(_nodeAddress, _newWithdrawalAddress, block.timestamp);
    }
    /// @param _key The key for the record
    function getAddress(bytes32 _key) override external view returns (address r) {
        return addressStorage[_key];
    }
    /// @param _key The key for the record
    function getUint(bytes32 _key) override external view returns (uint256 r) {
        return uintStorage[_key];
    }
    /// @param _key The key for the record
    function getString(bytes32 _key) override external view returns (string memory) {
        return stringStorage[_key];
    }
    /// @param _key The key for the record
    function getBytes(bytes32 _key) override external view returns (bytes memory) {
        return bytesStorage[_key];
    }
    /// @param _key The key for the record
    function getBool(bytes32 _key) override external view returns (bool r) {
        return booleanStorage[_key];
    }
    /// @param _key The key for the record
    function getInt(bytes32 _key) override external view returns (int r) {
        return intStorage[_key];
    }
    /// @param _key The key for the record
    function getBytes32(bytes32 _key) override external view returns (bytes32 r) {
        return bytes32Storage[_key];
    }
    /// @param _key The key for the record
    function setAddress(bytes32 _key, address _value) onlyLatestRocketNetworkContract override external {
        addressStorage[_key] = _value;
    }
    /// @param _key The key for the record
    function setUint(bytes32 _key, uint _value) onlyLatestRocketNetworkContract override external {
        uintStorage[_key] = _value;
    }
    /// @param _key The key for the record
    function setString(bytes32 _key, string calldata _value) onlyLatestRocketNetworkContract override external {
        stringStorage[_key] = _value;
    }
    /// @param _key The key for the record
    function setBytes(bytes32 _key, bytes calldata _value) onlyLatestRocketNetworkContract override external {
        bytesStorage[_key] = _value;
    }
    /// @param _key The key for the record
    function setBool(bytes32 _key, bool _value) onlyLatestRocketNetworkContract override external {
        booleanStorage[_key] = _value;
    }
    /// @param _key The key for the record
    function setInt(bytes32 _key, int _value) onlyLatestRocketNetworkContract override external {
        intStorage[_key] = _value;
    }
    /// @param _key The key for the record
    function setBytes32(bytes32 _key, bytes32 _value) onlyLatestRocketNetworkContract override external {
        bytes32Storage[_key] = _value;
    }
    /// @param _key The key for the record
    function deleteAddress(bytes32 _key) onlyLatestRocketNetworkContract override external {
        delete addressStorage[_key];
    }
    /// @param _key The key for the record
    function deleteUint(bytes32 _key) onlyLatestRocketNetworkContract override external {
        delete uintStorage[_key];
    }
    /// @param _key The key for the record
    function deleteString(bytes32 _key) onlyLatestRocketNetworkContract override external {
        delete stringStorage[_key];
    }
    /// @param _key The key for the record
    function deleteBytes(bytes32 _key) onlyLatestRocketNetworkContract override external {
        delete bytesStorage[_key];
    }
    /// @param _key The key for the record
    function deleteBool(bytes32 _key) onlyLatestRocketNetworkContract override external {
        delete booleanStorage[_key];
    }
    /// @param _key The key for the record
    function deleteInt(bytes32 _key) onlyLatestRocketNetworkContract override external {
        delete intStorage[_key];
    }
    /// @param _key The key for the record
    function deleteBytes32(bytes32 _key) onlyLatestRocketNetworkContract override external {
        delete bytes32Storage[_key];
    }
    /// @param _key The key for the record
    /// @param _amount An amount to add to the record's value
    function addUint(bytes32 _key, uint256 _amount) onlyLatestRocketNetworkContract override external {
        uintStorage[_key] = uintStorage[_key].add(_amount);
    }
    /// @param _key The key for the record
    /// @param _amount An amount to subtract from the record's value
    function subUint(bytes32 _key, uint256 _amount) onlyLatestRocketNetworkContract override external {
        uintStorage[_key] = uintStorage[_key].sub(_amount);
    }
}
/**
  *       .
  *      / \\
  *     |.'.|
  *     |'.'|
  *   ,'|   |`.
  *  |,-'-|-'-.|
  *   __|_| |         _        _      _____           _
  *  | ___ \\|        | |      | |    | ___ \\         | |
  *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
  *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
  *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
  *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
  * +---------------------------------------------------+
  * |    DECENTRALISED STAKING PROTOCOL FOR ETHEREUM    |
  * +---------------------------------------------------+
  *
  *  Rocket Pool is a first-of-its-kind Ethereum staking pool protocol, designed to
  *  be community-owned, decentralised, and trustless.
  *
  *  For more information about Rocket Pool, visit https://rocketpool.net
  *
  *  Authors: David Rugendyke, Jake Pospischil, Kane Wallmann, Darren Langley, Joe Clapis, Nick Doherty
  *
  */
pragma solidity 0.7.6;
// SPDX-License-Identifier: GPL-3.0-only
interface RocketStorageInterface {
    // Deploy status
    function getDeployedStatus() external view returns (bool);
    // Guardian
    function getGuardian() external view returns(address);
    function setGuardian(address _newAddress) external;
    function confirmGuardian() external;
    // Getters
    function getAddress(bytes32 _key) external view returns (address);
    function getUint(bytes32 _key) external view returns (uint);
    function getString(bytes32 _key) external view returns (string memory);
    function getBytes(bytes32 _key) external view returns (bytes memory);
    function getBool(bytes32 _key) external view returns (bool);
    function getInt(bytes32 _key) external view returns (int);
    function getBytes32(bytes32 _key) external view returns (bytes32);
    // Setters
    function setAddress(bytes32 _key, address _value) external;
    function setUint(bytes32 _key, uint _value) external;
    function setString(bytes32 _key, string calldata _value) external;
    function setBytes(bytes32 _key, bytes calldata _value) external;
    function setBool(bytes32 _key, bool _value) external;
    function setInt(bytes32 _key, int _value) external;
    function setBytes32(bytes32 _key, bytes32 _value) external;
    // Deleters
    function deleteAddress(bytes32 _key) external;
    function deleteUint(bytes32 _key) external;
    function deleteString(bytes32 _key) external;
    function deleteBytes(bytes32 _key) external;
    function deleteBool(bytes32 _key) external;
    function deleteInt(bytes32 _key) external;
    function deleteBytes32(bytes32 _key) external;
    // Arithmetic
    function addUint(bytes32 _key, uint256 _amount) external;
    function subUint(bytes32 _key, uint256 _amount) external;
    // Protected storage
    function getNodeWithdrawalAddress(address _nodeAddress) external view returns (address);
    function getNodePendingWithdrawalAddress(address _nodeAddress) external view returns (address);
    function setWithdrawalAddress(address _nodeAddress, address _newWithdrawalAddress, bool _confirm) external;
    function confirmWithdrawalAddress(address _nodeAddress) external;
}

/**
   *       .
   *      / \\
   *     |.'.|
   *     |'.'|
   *   ,'|   |'.
   *  |,-'-|-'-.|
   *   __|_| |         _        _      _____           _
   *  | ___ \\|        | |      | |    | ___ \\         | |
   *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
   *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
   *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
   *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
   * +---------------------------------------------------+
   * |    DECENTRALISED STAKING PROTOCOL FOR ETHEREUM    |
   * +---------------------------------------------------+
   *
   *  Rocket Pool is a first-of-its-kind Ethereum staking pool protocol, designed to
   *  be community-owned, decentralised, permissionless, & trustless.
   *
   *  For more information about Rocket Pool, visit https://rocketpool.net
   *
   *  Authored by the Rocket Pool Core Team
   *  Contributors: https://github.com/rocket-pool/rocketpool/graphs/contributors
   *  A special thanks to the Rocket Pool community for all their contributions.
   *
   */
pragma solidity >0.5.0 <0.9.0;
// SPDX-License-Identifier: GPL-3.0-only
interface RocketStorageInterface {
    // Deploy status
    function getDeployedStatus() external view returns (bool);
    // Guardian
    function getGuardian() external view returns(address);
    function setGuardian(address _newAddress) external;
    function confirmGuardian() external;
    // Getters
    function getAddress(bytes32 _key) external view returns (address);
    function getUint(bytes32 _key) external view returns (uint);
    function getString(bytes32 _key) external view returns (string memory);
    function getBytes(bytes32 _key) external view returns (bytes memory);
    function getBool(bytes32 _key) external view returns (bool);
    function getInt(bytes32 _key) external view returns (int);
    function getBytes32(bytes32 _key) external view returns (bytes32);
    // Setters
    function setAddress(bytes32 _key, address _value) external;
    function setUint(bytes32 _key, uint _value) external;
    function setString(bytes32 _key, string calldata _value) external;
    function setBytes(bytes32 _key, bytes calldata _value) external;
    function setBool(bytes32 _key, bool _value) external;
    function setInt(bytes32 _key, int _value) external;
    function setBytes32(bytes32 _key, bytes32 _value) external;
    // Deleters
    function deleteAddress(bytes32 _key) external;
    function deleteUint(bytes32 _key) external;
    function deleteString(bytes32 _key) external;
    function deleteBytes(bytes32 _key) external;
    function deleteBool(bytes32 _key) external;
    function deleteInt(bytes32 _key) external;
    function deleteBytes32(bytes32 _key) external;
    // Arithmetic
    function addUint(bytes32 _key, uint256 _amount) external;
    function subUint(bytes32 _key, uint256 _amount) external;
    // Protected storage
    function getNodeWithdrawalAddress(address _nodeAddress) external view returns (address);
    function getNodePendingWithdrawalAddress(address _nodeAddress) external view returns (address);
    function setWithdrawalAddress(address _nodeAddress, address _newWithdrawalAddress, bool _confirm) external;
    function confirmWithdrawalAddress(address _nodeAddress) external;
}
/**
   *       .
   *      / \\
   *     |.'.|
   *     |'.'|
   *   ,'|   |'.
   *  |,-'-|-'-.|
   *   __|_| |         _        _      _____           _
   *  | ___ \\|        | |      | |    | ___ \\         | |
   *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
   *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
   *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
   *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
   * +---------------------------------------------------+
   * |    DECENTRALISED STAKING PROTOCOL FOR ETHEREUM    |
   * +---------------------------------------------------+
   *
   *  Rocket Pool is a first-of-its-kind Ethereum staking pool protocol, designed to
   *  be community-owned, decentralised, permissionless, & trustless.
   *
   *  For more information about Rocket Pool, visit https://rocketpool.net
   *
   *  Authored by the Rocket Pool Core Team
   *  Contributors: https://github.com/rocket-pool/rocketpool/graphs/contributors
   *  A special thanks to the Rocket Pool community for all their contributions.
   *
   */
pragma solidity >0.5.0 <0.9.0;
// SPDX-License-Identifier: GPL-3.0-only
import "../interface/RocketStorageInterface.sol";
/// @title Base settings / modifiers for each contract in Rocket Pool
/// @author David Rugendyke
abstract contract RocketBase {
    // Calculate using this as the base
    uint256 constant calcBase = 1 ether;
    // Version of the contract
    uint8 public version;
    // The main storage contract where primary persistant storage is maintained
    RocketStorageInterface rocketStorage = RocketStorageInterface(address(0));
    /*** Modifiers **********************************************************/
    /**
    * @dev Throws if called by any sender that doesn't match a Rocket Pool network contract
    */
    modifier onlyLatestNetworkContract() {
        require(getBool(keccak256(abi.encodePacked("contract.exists", msg.sender))), "Invalid or outdated network contract");
        _;
    }
    /**
    * @dev Throws if called by any sender that doesn't match one of the supplied contract or is the latest version of that contract
    */
    modifier onlyLatestContract(string memory _contractName, address _contractAddress) {
        require(_contractAddress == getAddress(keccak256(abi.encodePacked("contract.address", _contractName))), "Invalid or outdated contract");
        _;
    }
    /**
    * @dev Throws if called by any sender that isn't a registered node
    */
    modifier onlyRegisteredNode(address _nodeAddress) {
        require(getBool(keccak256(abi.encodePacked("node.exists", _nodeAddress))), "Invalid node");
        _;
    }
    /**
    * @dev Throws if called by any sender that isn't a trusted node DAO member
    */
    modifier onlyTrustedNode(address _nodeAddress) {
        require(getBool(keccak256(abi.encodePacked("dao.trustednodes.", "member", _nodeAddress))), "Invalid trusted node");
        _;
    }
    /**
    * @dev Throws if called by any sender that isn't a registered minipool
    */
    modifier onlyRegisteredMinipool(address _minipoolAddress) {
        require(getBool(keccak256(abi.encodePacked("minipool.exists", _minipoolAddress))), "Invalid minipool");
        _;
    }
    
    /**
    * @dev Throws if called by any account other than a guardian account (temporary account allowed access to settings before DAO is fully enabled)
    */
    modifier onlyGuardian() {
        require(msg.sender == rocketStorage.getGuardian(), "Account is not a temporary guardian");
        _;
    }
    /*** Methods **********************************************************/
    /// @dev Set the main Rocket Storage address
    constructor(RocketStorageInterface _rocketStorageAddress) {
        // Update the contract address
        rocketStorage = RocketStorageInterface(_rocketStorageAddress);
    }
    /// @dev Get the address of a network contract by name
    function getContractAddress(string memory _contractName) internal view returns (address) {
        // Get the current contract address
        address contractAddress = getAddress(keccak256(abi.encodePacked("contract.address", _contractName)));
        // Check it
        require(contractAddress != address(0x0), "Contract not found");
        // Return
        return contractAddress;
    }
    /// @dev Get the address of a network contract by name (returns address(0x0) instead of reverting if contract does not exist)
    function getContractAddressUnsafe(string memory _contractName) internal view returns (address) {
        // Get the current contract address
        address contractAddress = getAddress(keccak256(abi.encodePacked("contract.address", _contractName)));
        // Return
        return contractAddress;
    }
    /// @dev Get the name of a network contract by address
    function getContractName(address _contractAddress) internal view returns (string memory) {
        // Get the contract name
        string memory contractName = getString(keccak256(abi.encodePacked("contract.name", _contractAddress)));
        // Check it
        require(bytes(contractName).length > 0, "Contract not found");
        // Return
        return contractName;
    }
    /// @dev Get revert error message from a .call method
    function getRevertMsg(bytes memory _returnData) internal pure returns (string memory) {
        // If the _res length is less than 68, then the transaction failed silently (without a revert message)
        if (_returnData.length < 68) return "Transaction reverted silently";
        assembly {
            // Slice the sighash.
            _returnData := add(_returnData, 0x04)
        }
        return abi.decode(_returnData, (string)); // All that remains is the revert string
    }
    /*** Rocket Storage Methods ****************************************/
    // Note: Unused helpers have been removed to keep contract sizes down
    /// @dev Storage get methods
    function getAddress(bytes32 _key) internal view returns (address) { return rocketStorage.getAddress(_key); }
    function getUint(bytes32 _key) internal view returns (uint) { return rocketStorage.getUint(_key); }
    function getString(bytes32 _key) internal view returns (string memory) { return rocketStorage.getString(_key); }
    function getBytes(bytes32 _key) internal view returns (bytes memory) { return rocketStorage.getBytes(_key); }
    function getBool(bytes32 _key) internal view returns (bool) { return rocketStorage.getBool(_key); }
    function getInt(bytes32 _key) internal view returns (int) { return rocketStorage.getInt(_key); }
    function getBytes32(bytes32 _key) internal view returns (bytes32) { return rocketStorage.getBytes32(_key); }
    /// @dev Storage set methods
    function setAddress(bytes32 _key, address _value) internal { rocketStorage.setAddress(_key, _value); }
    function setUint(bytes32 _key, uint _value) internal { rocketStorage.setUint(_key, _value); }
    function setString(bytes32 _key, string memory _value) internal { rocketStorage.setString(_key, _value); }
    function setBytes(bytes32 _key, bytes memory _value) internal { rocketStorage.setBytes(_key, _value); }
    function setBool(bytes32 _key, bool _value) internal { rocketStorage.setBool(_key, _value); }
    function setInt(bytes32 _key, int _value) internal { rocketStorage.setInt(_key, _value); }
    function setBytes32(bytes32 _key, bytes32 _value) internal { rocketStorage.setBytes32(_key, _value); }
    /// @dev Storage delete methods
    function deleteAddress(bytes32 _key) internal { rocketStorage.deleteAddress(_key); }
    function deleteUint(bytes32 _key) internal { rocketStorage.deleteUint(_key); }
    function deleteString(bytes32 _key) internal { rocketStorage.deleteString(_key); }
    function deleteBytes(bytes32 _key) internal { rocketStorage.deleteBytes(_key); }
    function deleteBool(bytes32 _key) internal { rocketStorage.deleteBool(_key); }
    function deleteInt(bytes32 _key) internal { rocketStorage.deleteInt(_key); }
    function deleteBytes32(bytes32 _key) internal { rocketStorage.deleteBytes32(_key); }
    /// @dev Storage arithmetic methods
    function addUint(bytes32 _key, uint256 _amount) internal { rocketStorage.addUint(_key, _amount); }
    function subUint(bytes32 _key, uint256 _amount) internal { rocketStorage.subUint(_key, _amount); }
}
/**
   *       .
   *      / \\
   *     |.'.|
   *     |'.'|
   *   ,'|   |'.
   *  |,-'-|-'-.|
   *   __|_| |         _        _      _____           _
   *  | ___ \\|        | |      | |    | ___ \\         | |
   *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
   *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
   *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
   *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
   * +---------------------------------------------------+
   * |    DECENTRALISED STAKING PROTOCOL FOR ETHEREUM    |
   * +---------------------------------------------------+
   *
   *  Rocket Pool is a first-of-its-kind Ethereum staking pool protocol, designed to
   *  be community-owned, decentralised, permissionless, & trustless.
   *
   *  For more information about Rocket Pool, visit https://rocketpool.net
   *
   *  Authored by the Rocket Pool Core Team
   *  Contributors: https://github.com/rocket-pool/rocketpool/graphs/contributors
   *  A special thanks to the Rocket Pool community for all their contributions.
   *
   */
pragma solidity >0.5.0 <0.9.0;
// SPDX-License-Identifier: GPL-3.0-only
interface RocketDAONodeTrustedInterface {
    function getBootstrapModeDisabled() external view returns (bool);
    function getMemberQuorumVotesRequired() external view returns (uint256);
    function getMemberAt(uint256 _index) external view returns (address);
    function getMemberCount() external view returns (uint256);
    function getMemberMinRequired() external view returns (uint256);
    function getMemberIsValid(address _nodeAddress) external view returns (bool);
    function getMemberLastProposalTime(address _nodeAddress) external view returns (uint256);
    function getMemberID(address _nodeAddress) external view returns (string memory);
    function getMemberUrl(address _nodeAddress) external view returns (string memory);
    function getMemberJoinedTime(address _nodeAddress) external view returns (uint256);
    function getMemberProposalExecutedTime(string memory _proposalType, address _nodeAddress) external view returns (uint256);
    function getMemberRPLBondAmount(address _nodeAddress) external view returns (uint256);
    function getMemberIsChallenged(address _nodeAddress) external view returns (bool);
    function getMemberUnbondedValidatorCount(address _nodeAddress) external view returns (uint256);
    function incrementMemberUnbondedValidatorCount(address _nodeAddress) external;
    function decrementMemberUnbondedValidatorCount(address _nodeAddress) external;
    function bootstrapMember(string memory _id, string memory _url, address _nodeAddress) external;
    function bootstrapSettingUint(string memory _settingContractName, string memory _settingPath, uint256 _value) external;
    function bootstrapSettingBool(string memory _settingContractName, string memory _settingPath, bool _value) external;
    function bootstrapUpgrade(string memory _type, string memory _name, string memory _contractAbi, address _contractAddress) external;
    function bootstrapDisable(bool _confirmDisableBootstrapMode) external;
    function memberJoinRequired(string memory _id, string memory _url) external;
}
/**
   *       .
   *      / \\
   *     |.'.|
   *     |'.'|
   *   ,'|   |'.
   *  |,-'-|-'-.|
   *   __|_| |         _        _      _____           _
   *  | ___ \\|        | |      | |    | ___ \\         | |
   *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
   *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
   *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
   *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
   * +---------------------------------------------------+
   * |    DECENTRALISED STAKING PROTOCOL FOR ETHEREUM    |
   * +---------------------------------------------------+
   *
   *  Rocket Pool is a first-of-its-kind Ethereum staking pool protocol, designed to
   *  be community-owned, decentralised, permissionless, & trustless.
   *
   *  For more information about Rocket Pool, visit https://rocketpool.net
   *
   *  Authored by the Rocket Pool Core Team
   *  Contributors: https://github.com/rocket-pool/rocketpool/graphs/contributors
   *  A special thanks to the Rocket Pool community for all their contributions.
   *
   */
pragma solidity >0.5.0 <0.9.0;
pragma abicoder v2;
// SPDX-License-Identifier: GPL-3.0-only
interface RocketNetworkBalancesInterface {
    function getBalancesBlock() external view returns (uint256);
    function getTotalETHBalance() external view returns (uint256);
    function getStakingETHBalance() external view returns (uint256);
    function getTotalRETHSupply() external view returns (uint256);
    function getETHUtilizationRate() external view returns (uint256);
    function submitBalances(uint256 _block, uint256 _slotTimestamp, uint256 _total, uint256 _staking, uint256 _rethSupply) external;
    function executeUpdateBalances(uint256 _block, uint256 _slotTimestamp, uint256 _totalEth, uint256 _stakingEth, uint256 _rethSupply) external;
}
/**
   *       .
   *      / \\
   *     |.'.|
   *     |'.'|
   *   ,'|   |'.
   *  |,-'-|-'-.|
   *   __|_| |         _        _      _____           _
   *  | ___ \\|        | |      | |    | ___ \\         | |
   *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
   *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
   *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
   *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
   * +---------------------------------------------------+
   * |    DECENTRALISED STAKING PROTOCOL FOR ETHEREUM    |
   * +---------------------------------------------------+
   *
   *  Rocket Pool is a first-of-its-kind Ethereum staking pool protocol, designed to
   *  be community-owned, decentralised, permissionless, & trustless.
   *
   *  For more information about Rocket Pool, visit https://rocketpool.net
   *
   *  Authored by the Rocket Pool Core Team
   *  Contributors: https://github.com/rocket-pool/rocketpool/graphs/contributors
   *  A special thanks to the Rocket Pool community for all their contributions.
   *
   */
pragma solidity >0.5.0 <0.9.0;
// SPDX-License-Identifier: GPL-3.0-only
interface RocketDAOProtocolSettingsNetworkInterface {
    function getNodeConsensusThreshold() external view returns (uint256);
    function getNodePenaltyThreshold() external view returns (uint256);
    function getPerPenaltyRate() external view returns (uint256);
    function getSubmitBalancesEnabled() external view returns (bool);
    function getSubmitBalancesFrequency() external view returns (uint256);
    function getSubmitPricesEnabled() external view returns (bool);
    function getSubmitPricesFrequency() external view returns (uint256);
    function getMinimumNodeFee() external view returns (uint256);
    function getTargetNodeFee() external view returns (uint256);
    function getMaximumNodeFee() external view returns (uint256);
    function getNodeFeeDemandRange() external view returns (uint256);
    function getTargetRethCollateralRate() external view returns (uint256);
    function getRethDepositDelay() external view returns (uint256);
    function getSubmitRewardsEnabled() external view returns (bool);
}
/**
   *       .
   *      / \\
   *     |.'.|
   *     |'.'|
   *   ,'|   |'.
   *  |,-'-|-'-.|
   *   __|_| |         _        _      _____           _
   *  | ___ \\|        | |      | |    | ___ \\         | |
   *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
   *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
   *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
   *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
   * +---------------------------------------------------+
   * |    DECENTRALISED STAKING PROTOCOL FOR ETHEREUM    |
   * +---------------------------------------------------+
   *
   *  Rocket Pool is a first-of-its-kind Ethereum staking pool protocol, designed to
   *  be community-owned, decentralised, permissionless, & trustless.
   *
   *  For more information about Rocket Pool, visit https://rocketpool.net
   *
   *  Authored by the Rocket Pool Core Team
   *  Contributors: https://github.com/rocket-pool/rocketpool/graphs/contributors
   *  A special thanks to the Rocket Pool community for all their contributions.
   *
   */
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity 0.8.18;
pragma abicoder v2;
import "../RocketBase.sol";
import "../../interface/dao/node/RocketDAONodeTrustedInterface.sol";
import "../../interface/network/RocketNetworkBalancesInterface.sol";
import "../../interface/dao/protocol/settings/RocketDAOProtocolSettingsNetworkInterface.sol";
/// @notice Oracle contract for network balance data
contract RocketNetworkBalances is RocketBase, RocketNetworkBalancesInterface {
    // Events
    event BalancesSubmitted(address indexed from, uint256 block, uint256 slotTimestamp, uint256 totalEth, uint256 stakingEth, uint256 rethSupply, uint256 blockTimestamp);
    event BalancesUpdated(uint256 indexed block, uint256 slotTimestamp, uint256 totalEth, uint256 stakingEth, uint256 rethSupply, uint256 blockTimestamp);
    constructor(RocketStorageInterface _rocketStorageAddress) RocketBase(_rocketStorageAddress) {
        version = 3;
    }
    /// @notice The block number which balances are current for
    function getBalancesBlock() override public view returns (uint256) {
        return getUint(keccak256("network.balances.updated.block"));
    }
    /// @notice Sets the block number which balances are current for
    function setBalancesBlock(uint256 _value) private {
        setUint(keccak256("network.balances.updated.block"), _value);
    }
    /// @notice The current RP network total ETH balance
    function getTotalETHBalance() override public view returns (uint256) {
        return getUint(keccak256("network.balance.total"));
    }
    /// @notice Sets the current RP network total ETH balance
    function setTotalETHBalance(uint256 _value) private {
        setUint(keccak256("network.balance.total"), _value);
    }
    /// @notice The current RP network staking ETH balance
    function getStakingETHBalance() override public view returns (uint256) {
        return getUint(keccak256("network.balance.staking"));
    }
    /// @notice Sets the current RP network staking ETH balance
    function setStakingETHBalance(uint256 _value) private {
        setUint(keccak256("network.balance.staking"), _value);
    }
    /// @notice The current RP network total rETH supply
    function getTotalRETHSupply() override external view returns (uint256) {
        return getUint(keccak256("network.balance.reth.supply"));
    }
    /// @notice Sets the current RP network total rETH supply
    function setTotalRETHSupply(uint256 _value) private {
        setUint(keccak256("network.balance.reth.supply"), _value);
    }
    /// @notice Get the current RP network ETH utilization rate as a fraction of 1 ETH
    ///         Represents what % of the network's balance is actively earning rewards
    function getETHUtilizationRate() override external view returns (uint256) {
        uint256 totalEthBalance = getTotalETHBalance();
        uint256 stakingEthBalance = getStakingETHBalance();
        if (totalEthBalance == 0) { return calcBase; }
        return calcBase * stakingEthBalance / totalEthBalance;
    }
    /// @notice Submit network balances for a block.
    ///         Only accepts calls from trusted (oracle) nodes.
    function submitBalances(uint256 _block, uint256 _slotTimestamp, uint256 _totalEth, uint256 _stakingEth, uint256 _rethSupply) override external onlyLatestContract("rocketNetworkBalances", address(this)) onlyTrustedNode(msg.sender) {
        // Check settings
        RocketDAOProtocolSettingsNetworkInterface rocketDAOProtocolSettingsNetwork = RocketDAOProtocolSettingsNetworkInterface(getContractAddress("rocketDAOProtocolSettingsNetwork"));
        require(rocketDAOProtocolSettingsNetwork.getSubmitBalancesEnabled(), "Submitting balances is currently disabled");
        // Check block
        require(_block < block.number, "Balances can not be submitted for a future block");
        uint256 lastBalancesBlock = getBalancesBlock();
        require(_block >= lastBalancesBlock, "Network balances for a higher block are set");
        // Get submission keys
        bytes32 nodeSubmissionKey = keccak256(abi.encodePacked("network.balances.submitted.node", msg.sender, _block, _slotTimestamp, _totalEth, _stakingEth, _rethSupply));
        bytes32 submissionCountKey = keccak256(abi.encodePacked("network.balances.submitted.count", _block, _slotTimestamp, _totalEth, _stakingEth, _rethSupply));
        // Check & update node submission status
        require(!getBool(nodeSubmissionKey), "Duplicate submission from node");
        setBool(nodeSubmissionKey, true);
        setBool(keccak256(abi.encodePacked("network.balances.submitted.node", msg.sender, _block)), true);
        // Increment submission count
        uint256 submissionCount = getUint(submissionCountKey) + 1;
        setUint(submissionCountKey, submissionCount);
        // Emit balances submitted event
        emit BalancesSubmitted(msg.sender, _block, _slotTimestamp, _totalEth, _stakingEth, _rethSupply, block.timestamp);
        // If voting past consensus, return
        if (_block == lastBalancesBlock) {
            return;
        }
        // Check submission count & update network balances
        RocketDAONodeTrustedInterface rocketDAONodeTrusted = RocketDAONodeTrustedInterface(getContractAddress("rocketDAONodeTrusted"));
        if (calcBase * submissionCount / rocketDAONodeTrusted.getMemberCount() >= rocketDAOProtocolSettingsNetwork.getNodeConsensusThreshold()) {
            updateBalances(_block, _slotTimestamp, _totalEth, _stakingEth, _rethSupply);
        }
    }
    /// @notice Executes updateBalances if consensus threshold is reached
    function executeUpdateBalances(uint256 _block, uint256 _slotTimestamp, uint256 _totalEth, uint256 _stakingEth, uint256 _rethSupply) override external onlyLatestContract("rocketNetworkBalances", address(this)) {
        // Check settings
        RocketDAOProtocolSettingsNetworkInterface rocketDAOProtocolSettingsNetwork = RocketDAOProtocolSettingsNetworkInterface(getContractAddress("rocketDAOProtocolSettingsNetwork"));
        require(rocketDAOProtocolSettingsNetwork.getSubmitBalancesEnabled(), "Submitting balances is currently disabled");
        // Check block
        require(_block < block.number, "Balances can not be submitted for a future block");
        require(_block > getBalancesBlock(), "Network balances for an equal or higher block are set");
        // Check balances
        require(_stakingEth <= _totalEth, "Invalid network balances");
        // Get submission keys
        bytes32 submissionCountKey = keccak256(abi.encodePacked("network.balances.submitted.count", _block, _slotTimestamp, _totalEth, _stakingEth, _rethSupply));
        // Get submission count
        uint256 submissionCount = getUint(submissionCountKey);
        // Check submission count & update network balances
        RocketDAONodeTrustedInterface rocketDAONodeTrusted = RocketDAONodeTrustedInterface(getContractAddress("rocketDAONodeTrusted"));
        require(calcBase * submissionCount / rocketDAONodeTrusted.getMemberCount() >= rocketDAOProtocolSettingsNetwork.getNodeConsensusThreshold(), "Consensus has not been reached");
        updateBalances(_block, _slotTimestamp, _totalEth, _stakingEth, _rethSupply);
    }
    /// @dev Internal method to update network balances
    function updateBalances(uint256 _block, uint256 _slotTimestamp, uint256 _totalEth, uint256 _stakingEth, uint256 _rethSupply) private {
        // Update balances
        setBalancesBlock(_block);
        setTotalETHBalance(_totalEth);
        setStakingETHBalance(_stakingEth);
        setTotalRETHSupply(_rethSupply);
        // Emit balances updated event
        emit BalancesUpdated(_block, _slotTimestamp, _totalEth, _stakingEth, _rethSupply, block.timestamp);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        uint256 c = a + b;
        if (c < a) return (false, 0);
        return (true, c);
    }
    /**
     * @dev Returns the substraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b > a) return (false, 0);
        return (true, a - b);
    }
    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) return (true, 0);
        uint256 c = a * b;
        if (c / a != b) return (false, 0);
        return (true, c);
    }
    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b == 0) return (false, 0);
        return (true, a / b);
    }
    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b == 0) return (false, 0);
        return (true, a % b);
    }
    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");
        return c;
    }
    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b <= a, "SafeMath: subtraction overflow");
        return a - b;
    }
    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) return 0;
        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");
        return c;
    }
    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b > 0, "SafeMath: division by zero");
        return a / b;
    }
    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b > 0, "SafeMath: modulo by zero");
        return a % b;
    }
    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        return a - b;
    }
    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryDiv}.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        return a / b;
    }
    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        return a % b;
    }
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
 * @title SignedSafeMath
 * @dev Signed math operations with safety checks that revert on error.
 */
library SignedSafeMath {
    int256 constant private _INT256_MIN = -2**255;
    /**
     * @dev Returns the multiplication of two signed integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(int256 a, int256 b) internal pure returns (int256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) {
            return 0;
        }
        require(!(a == -1 && b == _INT256_MIN), "SignedSafeMath: multiplication overflow");
        int256 c = a * b;
        require(c / a == b, "SignedSafeMath: multiplication overflow");
        return c;
    }
    /**
     * @dev Returns the integer division of two signed integers. Reverts on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(int256 a, int256 b) internal pure returns (int256) {
        require(b != 0, "SignedSafeMath: division by zero");
        require(!(b == -1 && a == _INT256_MIN), "SignedSafeMath: division overflow");
        int256 c = a / b;
        return c;
    }
    /**
     * @dev Returns the subtraction of two signed integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(int256 a, int256 b) internal pure returns (int256) {
        int256 c = a - b;
        require((b >= 0 && c <= a) || (b < 0 && c > a), "SignedSafeMath: subtraction overflow");
        return c;
    }
    /**
     * @dev Returns the addition of two signed integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(int256 a, int256 b) internal pure returns (int256) {
        int256 c = a + b;
        require((b >= 0 && c >= a) || (b < 0 && c < a), "SignedSafeMath: addition overflow");
        return c;
    }
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
 * @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow
 * checks.
 *
 * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can
 * easily result in undesired exploitation or bugs, since developers usually
 * assume that overflows raise errors. `SafeCast` restores this intuition by
 * reverting the transaction when such an operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 *
 * Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing
 * all math on `uint256` and `int256` and then downcasting.
 */
library SafeCast {
    /**
     * @dev Returns the downcasted uint128 from uint256, reverting on
     * overflow (when the input is greater than largest uint128).
     *
     * Counterpart to Solidity's `uint128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     */
    function toUint128(uint256 value) internal pure returns (uint128) {
        require(value < 2**128, "SafeCast: value doesn\\'t fit in 128 bits");
        return uint128(value);
    }
    /**
     * @dev Returns the downcasted uint64 from uint256, reverting on
     * overflow (when the input is greater than largest uint64).
     *
     * Counterpart to Solidity's `uint64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     */
    function toUint64(uint256 value) internal pure returns (uint64) {
        require(value < 2**64, "SafeCast: value doesn\\'t fit in 64 bits");
        return uint64(value);
    }
    /**
     * @dev Returns the downcasted uint32 from uint256, reverting on
     * overflow (when the input is greater than largest uint32).
     *
     * Counterpart to Solidity's `uint32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     */
    function toUint32(uint256 value) internal pure returns (uint32) {
        require(value < 2**32, "SafeCast: value doesn\\'t fit in 32 bits");
        return uint32(value);
    }
    /**
     * @dev Returns the downcasted uint16 from uint256, reverting on
     * overflow (when the input is greater than largest uint16).
     *
     * Counterpart to Solidity's `uint16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     */
    function toUint16(uint256 value) internal pure returns (uint16) {
        require(value < 2**16, "SafeCast: value doesn\\'t fit in 16 bits");
        return uint16(value);
    }
    /**
     * @dev Returns the downcasted uint8 from uint256, reverting on
     * overflow (when the input is greater than largest uint8).
     *
     * Counterpart to Solidity's `uint8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits.
     */
    function toUint8(uint256 value) internal pure returns (uint8) {
        require(value < 2**8, "SafeCast: value doesn\\'t fit in 8 bits");
        return uint8(value);
    }
    /**
     * @dev Converts a signed int256 into an unsigned uint256.
     *
     * Requirements:
     *
     * - input must be greater than or equal to 0.
     */
    function toUint256(int256 value) internal pure returns (uint256) {
        require(value >= 0, "SafeCast: value must be positive");
        return uint256(value);
    }
    /**
     * @dev Returns the downcasted int128 from int256, reverting on
     * overflow (when the input is less than smallest int128 or
     * greater than largest int128).
     *
     * Counterpart to Solidity's `int128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     *
     * _Available since v3.1._
     */
    function toInt128(int256 value) internal pure returns (int128) {
        require(value >= -2**127 && value < 2**127, "SafeCast: value doesn\\'t fit in 128 bits");
        return int128(value);
    }
    /**
     * @dev Returns the downcasted int64 from int256, reverting on
     * overflow (when the input is less than smallest int64 or
     * greater than largest int64).
     *
     * Counterpart to Solidity's `int64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     *
     * _Available since v3.1._
     */
    function toInt64(int256 value) internal pure returns (int64) {
        require(value >= -2**63 && value < 2**63, "SafeCast: value doesn\\'t fit in 64 bits");
        return int64(value);
    }
    /**
     * @dev Returns the downcasted int32 from int256, reverting on
     * overflow (when the input is less than smallest int32 or
     * greater than largest int32).
     *
     * Counterpart to Solidity's `int32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     *
     * _Available since v3.1._
     */
    function toInt32(int256 value) internal pure returns (int32) {
        require(value >= -2**31 && value < 2**31, "SafeCast: value doesn\\'t fit in 32 bits");
        return int32(value);
    }
    /**
     * @dev Returns the downcasted int16 from int256, reverting on
     * overflow (when the input is less than smallest int16 or
     * greater than largest int16).
     *
     * Counterpart to Solidity's `int16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     *
     * _Available since v3.1._
     */
    function toInt16(int256 value) internal pure returns (int16) {
        require(value >= -2**15 && value < 2**15, "SafeCast: value doesn\\'t fit in 16 bits");
        return int16(value);
    }
    /**
     * @dev Returns the downcasted int8 from int256, reverting on
     * overflow (when the input is less than smallest int8 or
     * greater than largest int8).
     *
     * Counterpart to Solidity's `int8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits.
     *
     * _Available since v3.1._
     */
    function toInt8(int256 value) internal pure returns (int8) {
        require(value >= -2**7 && value < 2**7, "SafeCast: value doesn\\'t fit in 8 bits");
        return int8(value);
    }
    /**
     * @dev Converts an unsigned uint256 into a signed int256.
     *
     * Requirements:
     *
     * - input must be less than or equal to maxInt256.
     */
    function toInt256(uint256 value) internal pure returns (int256) {
        require(value < 2**255, "SafeCast: value doesn't fit in an int256");
        return int256(value);
    }
}
/**
  *       .
  *      / \\
  *     |.'.|
  *     |'.'|
  *   ,'|   |`.
  *  |,-'-|-'-.|
  *   __|_| |         _        _      _____           _
  *  | ___ \\|        | |      | |    | ___ \\         | |
  *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
  *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
  *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
  *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
  * +---------------------------------------------------+
  * |  DECENTRALISED STAKING PROTOCOL FOR ETHEREUM 2.0  |
  * +---------------------------------------------------+
  *
  *  Rocket Pool is a first-of-its-kind ETH2 Proof of Stake protocol, designed to be community owned,
  *  decentralised, trustless and compatible with staking in Ethereum 2.0.
  *
  *  For more information about Rocket Pool, visit https://rocketpool.net
  *
  *  Authors: David Rugendyke, Jake Pospischil, Kane Wallmann, Darren Langley, Joe Clapis, Nick Doherty
  *
  */
pragma solidity >0.5.0 <0.9.0;
// SPDX-License-Identifier: GPL-3.0-only
interface RocketStorageInterface {
    // Deploy status
    function getDeployedStatus() external view returns (bool);
    // Guardian
    function getGuardian() external view returns(address);
    function setGuardian(address _newAddress) external;
    function confirmGuardian() external;
    // Getters
    function getAddress(bytes32 _key) external view returns (address);
    function getUint(bytes32 _key) external view returns (uint);
    function getString(bytes32 _key) external view returns (string memory);
    function getBytes(bytes32 _key) external view returns (bytes memory);
    function getBool(bytes32 _key) external view returns (bool);
    function getInt(bytes32 _key) external view returns (int);
    function getBytes32(bytes32 _key) external view returns (bytes32);
    // Setters
    function setAddress(bytes32 _key, address _value) external;
    function setUint(bytes32 _key, uint _value) external;
    function setString(bytes32 _key, string calldata _value) external;
    function setBytes(bytes32 _key, bytes calldata _value) external;
    function setBool(bytes32 _key, bool _value) external;
    function setInt(bytes32 _key, int _value) external;
    function setBytes32(bytes32 _key, bytes32 _value) external;
    // Deleters
    function deleteAddress(bytes32 _key) external;
    function deleteUint(bytes32 _key) external;
    function deleteString(bytes32 _key) external;
    function deleteBytes(bytes32 _key) external;
    function deleteBool(bytes32 _key) external;
    function deleteInt(bytes32 _key) external;
    function deleteBytes32(bytes32 _key) external;
    // Arithmetic
    function addUint(bytes32 _key, uint256 _amount) external;
    function subUint(bytes32 _key, uint256 _amount) external;
    // Protected storage
    function getNodeWithdrawalAddress(address _nodeAddress) external view returns (address);
    function getNodePendingWithdrawalAddress(address _nodeAddress) external view returns (address);
    function setWithdrawalAddress(address _nodeAddress, address _newWithdrawalAddress, bool _confirm) external;
    function confirmWithdrawalAddress(address _nodeAddress) external;
}
/**
  *       .
  *      / \\
  *     |.'.|
  *     |'.'|
  *   ,'|   |`.
  *  |,-'-|-'-.|
  *   __|_| |         _        _      _____           _
  *  | ___ \\|        | |      | |    | ___ \\         | |
  *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
  *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
  *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
  *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
  * +---------------------------------------------------+
  * |  DECENTRALISED STAKING PROTOCOL FOR ETHEREUM 2.0  |
  * +---------------------------------------------------+
  *
  *  Rocket Pool is a first-of-its-kind ETH2 Proof of Stake protocol, designed to be community owned,
  *  decentralised, trustless and compatible with staking in Ethereum 2.0.
  *
  *  For more information about Rocket Pool, visit https://rocketpool.net
  *
  *  Authors: David Rugendyke, Jake Pospischil, Kane Wallmann, Darren Langley, Joe Clapis, Nick Doherty
  *
  */
pragma solidity 0.7.6;
// SPDX-License-Identifier: GPL-3.0-only
import "../interface/RocketStorageInterface.sol";
/// @title Base settings / modifiers for each contract in Rocket Pool
/// @author David Rugendyke
abstract contract RocketBase {
    // Calculate using this as the base
    uint256 constant calcBase = 1 ether;
    // Version of the contract
    uint8 public version;
    // The main storage contract where primary persistant storage is maintained
    RocketStorageInterface rocketStorage = RocketStorageInterface(0);
    /*** Modifiers **********************************************************/
    /**
    * @dev Throws if called by any sender that doesn't match a Rocket Pool network contract
    */
    modifier onlyLatestNetworkContract() {
        require(getBool(keccak256(abi.encodePacked("contract.exists", msg.sender))), "Invalid or outdated network contract");
        _;
    }
    /**
    * @dev Throws if called by any sender that doesn't match one of the supplied contract or is the latest version of that contract
    */
    modifier onlyLatestContract(string memory _contractName, address _contractAddress) {
        require(_contractAddress == getAddress(keccak256(abi.encodePacked("contract.address", _contractName))), "Invalid or outdated contract");
        _;
    }
    /**
    * @dev Throws if called by any sender that isn't a registered node
    */
    modifier onlyRegisteredNode(address _nodeAddress) {
        require(getBool(keccak256(abi.encodePacked("node.exists", _nodeAddress))), "Invalid node");
        _;
    }
    /**
    * @dev Throws if called by any sender that isn't a trusted node DAO member
    */
    modifier onlyTrustedNode(address _nodeAddress) {
        require(getBool(keccak256(abi.encodePacked("dao.trustednodes.", "member", _nodeAddress))), "Invalid trusted node");
        _;
    }
    /**
    * @dev Throws if called by any sender that isn't a registered minipool
    */
    modifier onlyRegisteredMinipool(address _minipoolAddress) {
        require(getBool(keccak256(abi.encodePacked("minipool.exists", _minipoolAddress))), "Invalid minipool");
        _;
    }
    
    /**
    * @dev Throws if called by any account other than a guardian account (temporary account allowed access to settings before DAO is fully enabled)
    */
    modifier onlyGuardian() {
        require(msg.sender == rocketStorage.getGuardian(), "Account is not a temporary guardian");
        _;
    }
    /*** Methods **********************************************************/
    /// @dev Set the main Rocket Storage address
    constructor(RocketStorageInterface _rocketStorageAddress) {
        // Update the contract address
        rocketStorage = RocketStorageInterface(_rocketStorageAddress);
    }
    /// @dev Get the address of a network contract by name
    function getContractAddress(string memory _contractName) internal view returns (address) {
        // Get the current contract address
        address contractAddress = getAddress(keccak256(abi.encodePacked("contract.address", _contractName)));
        // Check it
        require(contractAddress != address(0x0), "Contract not found");
        // Return
        return contractAddress;
    }
    /// @dev Get the address of a network contract by name (returns address(0x0) instead of reverting if contract does not exist)
    function getContractAddressUnsafe(string memory _contractName) internal view returns (address) {
        // Get the current contract address
        address contractAddress = getAddress(keccak256(abi.encodePacked("contract.address", _contractName)));
        // Return
        return contractAddress;
    }
    /// @dev Get the name of a network contract by address
    function getContractName(address _contractAddress) internal view returns (string memory) {
        // Get the contract name
        string memory contractName = getString(keccak256(abi.encodePacked("contract.name", _contractAddress)));
        // Check it
        require(bytes(contractName).length > 0, "Contract not found");
        // Return
        return contractName;
    }
    /// @dev Get revert error message from a .call method
    function getRevertMsg(bytes memory _returnData) internal pure returns (string memory) {
        // If the _res length is less than 68, then the transaction failed silently (without a revert message)
        if (_returnData.length < 68) return "Transaction reverted silently";
        assembly {
            // Slice the sighash.
            _returnData := add(_returnData, 0x04)
        }
        return abi.decode(_returnData, (string)); // All that remains is the revert string
    }
    /*** Rocket Storage Methods ****************************************/
    // Note: Unused helpers have been removed to keep contract sizes down
    /// @dev Storage get methods
    function getAddress(bytes32 _key) internal view returns (address) { return rocketStorage.getAddress(_key); }
    function getUint(bytes32 _key) internal view returns (uint) { return rocketStorage.getUint(_key); }
    function getString(bytes32 _key) internal view returns (string memory) { return rocketStorage.getString(_key); }
    function getBytes(bytes32 _key) internal view returns (bytes memory) { return rocketStorage.getBytes(_key); }
    function getBool(bytes32 _key) internal view returns (bool) { return rocketStorage.getBool(_key); }
    function getInt(bytes32 _key) internal view returns (int) { return rocketStorage.getInt(_key); }
    function getBytes32(bytes32 _key) internal view returns (bytes32) { return rocketStorage.getBytes32(_key); }
    /// @dev Storage set methods
    function setAddress(bytes32 _key, address _value) internal { rocketStorage.setAddress(_key, _value); }
    function setUint(bytes32 _key, uint _value) internal { rocketStorage.setUint(_key, _value); }
    function setString(bytes32 _key, string memory _value) internal { rocketStorage.setString(_key, _value); }
    function setBytes(bytes32 _key, bytes memory _value) internal { rocketStorage.setBytes(_key, _value); }
    function setBool(bytes32 _key, bool _value) internal { rocketStorage.setBool(_key, _value); }
    function setInt(bytes32 _key, int _value) internal { rocketStorage.setInt(_key, _value); }
    function setBytes32(bytes32 _key, bytes32 _value) internal { rocketStorage.setBytes32(_key, _value); }
    /// @dev Storage delete methods
    function deleteAddress(bytes32 _key) internal { rocketStorage.deleteAddress(_key); }
    function deleteUint(bytes32 _key) internal { rocketStorage.deleteUint(_key); }
    function deleteString(bytes32 _key) internal { rocketStorage.deleteString(_key); }
    function deleteBytes(bytes32 _key) internal { rocketStorage.deleteBytes(_key); }
    function deleteBool(bytes32 _key) internal { rocketStorage.deleteBool(_key); }
    function deleteInt(bytes32 _key) internal { rocketStorage.deleteInt(_key); }
    function deleteBytes32(bytes32 _key) internal { rocketStorage.deleteBytes32(_key); }
    /// @dev Storage arithmetic methods
    function addUint(bytes32 _key, uint256 _amount) internal { rocketStorage.addUint(_key, _amount); }
    function subUint(bytes32 _key, uint256 _amount) internal { rocketStorage.subUint(_key, _amount); }
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
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);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <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 GSN 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 payable) {
        return msg.sender;
    }
    function _msgData() internal view virtual returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../../utils/Context.sol";
import "./IERC20.sol";
import "../../math/SafeMath.sol";
/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20PresetMinterPauser}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * We have followed general OpenZeppelin guidelines: functions revert instead
 * of returning `false` on failure. This behavior is nonetheless conventional
 * and does not conflict with the expectations of ERC20 applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
contract ERC20 is Context, IERC20 {
    using SafeMath for uint256;
    mapping (address => uint256) private _balances;
    mapping (address => mapping (address => uint256)) private _allowances;
    uint256 private _totalSupply;
    string private _name;
    string private _symbol;
    uint8 private _decimals;
    /**
     * @dev Sets the values for {name} and {symbol}, initializes {decimals} with
     * a default value of 18.
     *
     * To select a different value for {decimals}, use {_setupDecimals}.
     *
     * All three of these values are immutable: they can only be set once during
     * construction.
     */
    constructor (string memory name_, string memory symbol_) public {
        _name = name_;
        _symbol = symbol_;
        _decimals = 18;
    }
    /**
     * @dev Returns the name of the token.
     */
    function name() public view virtual returns (string memory) {
        return _name;
    }
    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual returns (string memory) {
        return _symbol;
    }
    /**
     * @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() public view virtual returns (uint8) {
        return _decimals;
    }
    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }
    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view virtual override returns (uint256) {
        return _balances[account];
    }
    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `recipient` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }
    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }
    /**
     * @dev See {IERC20-approve}.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }
    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * Requirements:
     *
     * - `sender` and `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     * - the caller must have allowance for ``sender``'s tokens of at least
     * `amount`.
     */
    function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
        return true;
    }
    /**
     * @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}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
        return true;
    }
    /**
     * @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}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
        return true;
    }
    /**
     * @dev Moves tokens `amount` from `sender` to `recipient`.
     *
     * This is internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `sender` cannot be the zero address.
     * - `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     */
    function _transfer(address sender, address recipient, uint256 amount) internal virtual {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");
        _beforeTokenTransfer(sender, recipient, amount);
        _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
        _balances[recipient] = _balances[recipient].add(amount);
        emit Transfer(sender, recipient, amount);
    }
    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");
        _beforeTokenTransfer(address(0), account, amount);
        _totalSupply = _totalSupply.add(amount);
        _balances[account] = _balances[account].add(amount);
        emit Transfer(address(0), account, amount);
    }
    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");
        _beforeTokenTransfer(account, address(0), amount);
        _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
        _totalSupply = _totalSupply.sub(amount);
        emit Transfer(account, address(0), amount);
    }
    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(address owner, address spender, uint256 amount) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");
        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }
    /**
     * @dev Sets {decimals} to a value other than the default one of 18.
     *
     * WARNING: This function should only be called from the constructor. Most
     * applications that interact with token contracts will not expect
     * {decimals} to ever change, and may work incorrectly if it does.
     */
    function _setupDecimals(uint8 decimals_) internal virtual {
        _decimals = decimals_;
    }
    /**
     * @dev Hook that is called before any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * will be to transferred to `to`.
     * - when `from` is zero, `amount` tokens will be minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../../utils/Context.sol";
import "./ERC20.sol";
/**
 * @dev Extension of {ERC20} that allows token holders to destroy both their own
 * tokens and those that they have an allowance for, in a way that can be
 * recognized off-chain (via event analysis).
 */
abstract contract ERC20Burnable is Context, ERC20 {
    using SafeMath for uint256;
    /**
     * @dev Destroys `amount` tokens from the caller.
     *
     * See {ERC20-_burn}.
     */
    function burn(uint256 amount) public virtual {
        _burn(_msgSender(), amount);
    }
    /**
     * @dev Destroys `amount` tokens from `account`, deducting from the caller's
     * allowance.
     *
     * See {ERC20-_burn} and {ERC20-allowance}.
     *
     * Requirements:
     *
     * - the caller must have allowance for ``accounts``'s tokens of at least
     * `amount`.
     */
    function burnFrom(address account, uint256 amount) public virtual {
        uint256 decreasedAllowance = allowance(account, _msgSender()).sub(amount, "ERC20: burn amount exceeds allowance");
        _approve(account, _msgSender(), decreasedAllowance);
        _burn(account, amount);
    }
}
/**
  *       .
  *      / \\
  *     |.'.|
  *     |'.'|
  *   ,'|   |`.
  *  |,-'-|-'-.|
  *   __|_| |         _        _      _____           _
  *  | ___ \\|        | |      | |    | ___ \\         | |
  *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
  *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
  *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
  *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
  * +---------------------------------------------------+
  * |  DECENTRALISED STAKING PROTOCOL FOR ETHEREUM 2.0  |
  * +---------------------------------------------------+
  *
  *  Rocket Pool is a first-of-its-kind ETH2 Proof of Stake protocol, designed to be community owned,
  *  decentralised, trustless and compatible with staking in Ethereum 2.0.
  *
  *  For more information about Rocket Pool, visit https://rocketpool.net
  *
  *  Authors: David Rugendyke, Jake Pospischil, Kane Wallmann, Darren Langley, Joe Clapis, Nick Doherty
  *
  */
pragma solidity >0.5.0 <0.9.0;
// SPDX-License-Identifier: GPL-3.0-only
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20Burnable.sol";
interface RocketVaultInterface {
    function balanceOf(string memory _networkContractName) external view returns (uint256);
    function depositEther() external payable;
    function withdrawEther(uint256 _amount) external;
    function depositToken(string memory _networkContractName, IERC20 _tokenAddress, uint256 _amount) external;
    function withdrawToken(address _withdrawalAddress, IERC20 _tokenAddress, uint256 _amount) external;
    function balanceOfToken(string memory _networkContractName, IERC20 _tokenAddress) external view returns (uint256);
    function transferToken(string memory _networkContractName, IERC20 _tokenAddress, uint256 _amount) external;
    function burnToken(ERC20Burnable _tokenAddress, uint256 _amount) external;
}
/**
  *       .
  *      / \\
  *     |.'.|
  *     |'.'|
  *   ,'|   |`.
  *  |,-'-|-'-.|
  *   __|_| |         _        _      _____           _
  *  | ___ \\|        | |      | |    | ___ \\         | |
  *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
  *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
  *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
  *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
  * +---------------------------------------------------+
  * |  DECENTRALISED STAKING PROTOCOL FOR ETHEREUM 2.0  |
  * +---------------------------------------------------+
  *
  *  Rocket Pool is a first-of-its-kind ETH2 Proof of Stake protocol, designed to be community owned,
  *  decentralised, trustless and compatible with staking in Ethereum 2.0.
  *
  *  For more information about Rocket Pool, visit https://rocketpool.net
  *
  *  Authors: David Rugendyke, Jake Pospischil, Kane Wallmann, Darren Langley, Joe Clapis, Nick Doherty
  *
  */
pragma solidity >0.5.0 <0.9.0;
// SPDX-License-Identifier: GPL-3.0-only
interface RocketVaultWithdrawerInterface {
    function receiveVaultWithdrawalETH() external payable; 
}
/**
  *       .
  *      / \\
  *     |.'.|
  *     |'.'|
  *   ,'|   |`.
  *  |,-'-|-'-.|
  *   __|_| |         _        _      _____           _
  *  | ___ \\|        | |      | |    | ___ \\         | |
  *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
  *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
  *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
  *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
  * +---------------------------------------------------+
  * |  DECENTRALISED STAKING PROTOCOL FOR ETHEREUM 2.0  |
  * +---------------------------------------------------+
  *
  *  Rocket Pool is a first-of-its-kind ETH2 Proof of Stake protocol, designed to be community owned,
  *  decentralised, trustless and compatible with staking in Ethereum 2.0.
  *
  *  For more information about Rocket Pool, visit https://rocketpool.net
  *
  *  Authors: David Rugendyke, Jake Pospischil, Kane Wallmann, Darren Langley, Joe Clapis, Nick Doherty
  *
  */
pragma solidity >0.5.0 <0.9.0;
// SPDX-License-Identifier: GPL-3.0-only
interface RocketDepositPoolInterface {
    function getBalance() external view returns (uint256);
    function getNodeBalance() external view returns (uint256);
    function getUserBalance() external view returns (int256);
    function getExcessBalance() external view returns (uint256);
    function deposit() external payable;
    function getMaximumDepositAmount() external view returns (uint256);
    function nodeDeposit(uint256 _totalAmount) external payable;
    function nodeCreditWithdrawal(uint256 _amount) external;
    function recycleDissolvedDeposit() external payable;
    function recycleExcessCollateral() external payable;
    function recycleLiquidatedStake() external payable;
    function assignDeposits() external;
    function maybeAssignDeposits() external returns (bool);
    function withdrawExcessBalance(uint256 _amount) external;
}
/**
  *       .
  *      / \\
  *     |.'.|
  *     |'.'|
  *   ,'|   |`.
  *  |,-'-|-'-.|
  *   __|_| |         _        _      _____           _
  *  | ___ \\|        | |      | |    | ___ \\         | |
  *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
  *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
  *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
  *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
  * +---------------------------------------------------+
  * |  DECENTRALISED STAKING PROTOCOL FOR ETHEREUM 2.0  |
  * +---------------------------------------------------+
  *
  *  Rocket Pool is a first-of-its-kind ETH2 Proof of Stake protocol, designed to be community owned,
  *  decentralised, trustless and compatible with staking in Ethereum 2.0.
  *
  *  For more information about Rocket Pool, visit https://rocketpool.net
  *
  *  Authors: David Rugendyke, Jake Pospischil, Kane Wallmann, Darren Langley, Joe Clapis, Nick Doherty
  *
  */
pragma solidity 0.7.6;
// SPDX-License-Identifier: GPL-3.0-only
// Represents the type of deposits required by a minipool
enum MinipoolDeposit {
    None,       // Marks an invalid deposit type
    Full,       // The minipool requires 32 ETH from the node operator, 16 ETH of which will be refinanced from user deposits
    Half,       // The minipool required 16 ETH from the node operator to be matched with 16 ETH from user deposits
    Empty,      // The minipool requires 0 ETH from the node operator to be matched with 32 ETH from user deposits (trusted nodes only)
    Variable    // Indicates this minipool is of the new generation that supports a variable deposit amount
}
/**
  *       .
  *      / \\
  *     |.'.|
  *     |'.'|
  *   ,'|   |`.
  *  |,-'-|-'-.|
  *   __|_| |         _        _      _____           _
  *  | ___ \\|        | |      | |    | ___ \\         | |
  *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
  *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
  *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
  *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
  * +---------------------------------------------------+
  * |  DECENTRALISED STAKING PROTOCOL FOR ETHEREUM 2.0  |
  * +---------------------------------------------------+
  *
  *  Rocket Pool is a first-of-its-kind ETH2 Proof of Stake protocol, designed to be community owned,
  *  decentralised, trustless and compatible with staking in Ethereum 2.0.
  *
  *  For more information about Rocket Pool, visit https://rocketpool.net
  *
  *  Authors: David Rugendyke, Jake Pospischil, Kane Wallmann, Darren Langley, Joe Clapis, Nick Doherty
  *
  */
pragma solidity 0.7.6;
// SPDX-License-Identifier: GPL-3.0-only
// Represents a minipool's status within the network
enum MinipoolStatus {
    Initialised,    // The minipool has been initialised and is awaiting a deposit of user ETH
    Prelaunch,      // The minipool has enough ETH to begin staking and is awaiting launch by the node operator
    Staking,        // The minipool is currently staking
    Withdrawable,   // NO LONGER USED
    Dissolved       // The minipool has been dissolved and its user deposited ETH has been returned to the deposit pool
}
/**
  *       .
  *      / \\
  *     |.'.|
  *     |'.'|
  *   ,'|   |`.
  *  |,-'-|-'-.|
  *   __|_| |         _        _      _____           _
  *  | ___ \\|        | |      | |    | ___ \\         | |
  *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
  *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
  *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
  *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
  * +---------------------------------------------------+
  * |  DECENTRALISED STAKING PROTOCOL FOR ETHEREUM 2.0  |
  * +---------------------------------------------------+
  *
  *  Rocket Pool is a first-of-its-kind ETH2 Proof of Stake protocol, designed to be community owned,
  *  decentralised, trustless and compatible with staking in Ethereum 2.0.
  *
  *  For more information about Rocket Pool, visit https://rocketpool.net
  *
  *  Authors: David Rugendyke, Jake Pospischil, Kane Wallmann, Darren Langley, Joe Clapis, Nick Doherty
  *
  */
pragma solidity >0.5.0 <0.9.0;
// SPDX-License-Identifier: GPL-3.0-only
import "../../types/MinipoolDeposit.sol";
import "../../types/MinipoolStatus.sol";
import "../RocketStorageInterface.sol";
interface RocketMinipoolInterface {
    function version() external view returns (uint8);
    function initialise(address _nodeAddress) external;
    function getStatus() external view returns (MinipoolStatus);
    function getFinalised() external view returns (bool);
    function getStatusBlock() external view returns (uint256);
    function getStatusTime() external view returns (uint256);
    function getScrubVoted(address _member) external view returns (bool);
    function getDepositType() external view returns (MinipoolDeposit);
    function getNodeAddress() external view returns (address);
    function getNodeFee() external view returns (uint256);
    function getNodeDepositBalance() external view returns (uint256);
    function getNodeRefundBalance() external view returns (uint256);
    function getNodeDepositAssigned() external view returns (bool);
    function getPreLaunchValue() external view returns (uint256);
    function getNodeTopUpValue() external view returns (uint256);
    function getVacant() external view returns (bool);
    function getPreMigrationBalance() external view returns (uint256);
    function getUserDistributed() external view returns (bool);
    function getUserDepositBalance() external view returns (uint256);
    function getUserDepositAssigned() external view returns (bool);
    function getUserDepositAssignedTime() external view returns (uint256);
    function getTotalScrubVotes() external view returns (uint256);
    function calculateNodeShare(uint256 _balance) external view returns (uint256);
    function calculateUserShare(uint256 _balance) external view returns (uint256);
    function preDeposit(uint256 _bondingValue, bytes calldata _validatorPubkey, bytes calldata _validatorSignature, bytes32 _depositDataRoot) external payable;
    function deposit() external payable;
    function userDeposit() external payable;
    function distributeBalance(bool _rewardsOnly) external;
    function beginUserDistribute() external;
    function userDistributeAllowed() external view returns (bool);
    function refund() external;
    function slash() external;
    function finalise() external;
    function canStake() external view returns (bool);
    function canPromote() external view returns (bool);
    function stake(bytes calldata _validatorSignature, bytes32 _depositDataRoot) external;
    function prepareVacancy(uint256 _bondAmount, uint256 _currentBalance) external;
    function promote() external;
    function dissolve() external;
    function close() external;
    function voteScrub() external;
    function reduceBondAmount() external;
}
/**
  *       .
  *      / \\
  *     |.'.|
  *     |'.'|
  *   ,'|   |`.
  *  |,-'-|-'-.|
  *   __|_| |         _        _      _____           _
  *  | ___ \\|        | |      | |    | ___ \\         | |
  *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
  *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
  *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
  *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
  * +---------------------------------------------------+
  * |  DECENTRALISED STAKING PROTOCOL FOR ETHEREUM 2.0  |
  * +---------------------------------------------------+
  *
  *  Rocket Pool is a first-of-its-kind ETH2 Proof of Stake protocol, designed to be community owned,
  *  decentralised, trustless and compatible with staking in Ethereum 2.0.
  *
  *  For more information about Rocket Pool, visit https://rocketpool.net
  *
  *  Authors: David Rugendyke, Jake Pospischil, Kane Wallmann, Darren Langley, Joe Clapis, Nick Doherty
  *
  */
pragma solidity >0.5.0 <0.9.0;
// SPDX-License-Identifier: GPL-3.0-only
import "../../types/MinipoolDeposit.sol";
interface RocketMinipoolQueueInterface {
    function getTotalLength() external view returns (uint256);
    function getContainsLegacy() external view returns (bool);
    function getLengthLegacy(MinipoolDeposit _depositType) external view returns (uint256);
    function getLength() external view returns (uint256);
    function getTotalCapacity() external view returns (uint256);
    function getEffectiveCapacity() external view returns (uint256);
    function getNextCapacityLegacy() external view returns (uint256);
    function getNextDepositLegacy() external view returns (MinipoolDeposit, uint256);
    function enqueueMinipool(address _minipool) external;
    function dequeueMinipoolByDepositLegacy(MinipoolDeposit _depositType) external returns (address minipoolAddress);
    function dequeueMinipools(uint256 _maxToDequeue) external returns (address[] memory minipoolAddress);
    function removeMinipool(MinipoolDeposit _depositType) external;
    function getMinipoolAt(uint256 _index) external view returns(address);
    function getMinipoolPosition(address _minipool) external view returns (int256);
}
/**
  *       .
  *      / \\
  *     |.'.|
  *     |'.'|
  *   ,'|   |`.
  *  |,-'-|-'-.|
  *   __|_| |         _        _      _____           _
  *  | ___ \\|        | |      | |    | ___ \\         | |
  *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
  *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
  *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
  *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
  * +---------------------------------------------------+
  * |  DECENTRALISED STAKING PROTOCOL FOR ETHEREUM 2.0  |
  * +---------------------------------------------------+
  *
  *  Rocket Pool is a first-of-its-kind ETH2 Proof of Stake protocol, designed to be community owned,
  *  decentralised, trustless and compatible with staking in Ethereum 2.0.
  *
  *  For more information about Rocket Pool, visit https://rocketpool.net
  *
  *  Authors: David Rugendyke, Jake Pospischil, Kane Wallmann, Darren Langley, Joe Clapis, Nick Doherty
  *
  */
pragma solidity >0.5.0 <0.9.0;
// SPDX-License-Identifier: GPL-3.0-only
interface RocketDAOProtocolSettingsDepositInterface {
    function getDepositEnabled() external view returns (bool);
    function getAssignDepositsEnabled() external view returns (bool);
    function getMinimumDeposit() external view returns (uint256);
    function getMaximumDepositPoolSize() external view returns (uint256);
    function getMaximumDepositAssignments() external view returns (uint256);
    function getMaximumDepositSocialisedAssignments() external view returns (uint256);
    function getDepositFee() external view returns (uint256);
}
/**
  *       .
  *      / \\
  *     |.'.|
  *     |'.'|
  *   ,'|   |`.
  *  |,-'-|-'-.|
  *   __|_| |         _        _      _____           _
  *  | ___ \\|        | |      | |    | ___ \\         | |
  *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
  *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
  *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
  *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
  * +---------------------------------------------------+
  * |  DECENTRALISED STAKING PROTOCOL FOR ETHEREUM 2.0  |
  * +---------------------------------------------------+
  *
  *  Rocket Pool is a first-of-its-kind ETH2 Proof of Stake protocol, designed to be community owned,
  *  decentralised, trustless and compatible with staking in Ethereum 2.0.
  *
  *  For more information about Rocket Pool, visit https://rocketpool.net
  *
  *  Authors: David Rugendyke, Jake Pospischil, Kane Wallmann, Darren Langley, Joe Clapis, Nick Doherty
  *
  */
pragma solidity >0.5.0 <0.9.0;
// SPDX-License-Identifier: GPL-3.0-only
import "../../../../types/MinipoolDeposit.sol";
interface RocketDAOProtocolSettingsMinipoolInterface {
    function getLaunchBalance() external view returns (uint256);
    function getPreLaunchValue() external pure returns (uint256);
    function getDepositUserAmount(MinipoolDeposit _depositType) external view returns (uint256);
    function getFullDepositUserAmount() external view returns (uint256);
    function getHalfDepositUserAmount() external view returns (uint256);
    function getVariableDepositAmount() external view returns (uint256);
    function getSubmitWithdrawableEnabled() external view returns (bool);
    function getBondReductionEnabled() external view returns (bool);
    function getLaunchTimeout() external view returns (uint256);
    function getMaximumCount() external view returns (uint256);
    function isWithinUserDistributeWindow(uint256 _time) external view returns (bool);
    function hasUserDistributeWindowPassed(uint256 _time) external view returns (bool);
    function getUserDistributeWindowStart() external view returns (uint256);
    function getUserDistributeWindowLength() external view returns (uint256);
}
/**
  *       .
  *      / \\
  *     |.'.|
  *     |'.'|
  *   ,'|   |`.
  *  |,-'-|-'-.|
  *   __|_| |         _        _      _____           _
  *  | ___ \\|        | |      | |    | ___ \\         | |
  *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
  *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
  *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
  *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
  * +---------------------------------------------------+
  * |  DECENTRALISED STAKING PROTOCOL FOR ETHEREUM 2.0  |
  * +---------------------------------------------------+
  *
  *  Rocket Pool is a first-of-its-kind ETH2 Proof of Stake protocol, designed to be community owned,
  *  decentralised, trustless and compatible with staking in Ethereum 2.0.
  *
  *  For more information about Rocket Pool, visit https://rocketpool.net
  *
  *  Authors: David Rugendyke, Jake Pospischil, Kane Wallmann, Darren Langley, Joe Clapis, Nick Doherty
  *
  */
pragma solidity >0.5.0 <0.9.0;
// SPDX-License-Identifier: GPL-3.0-only
interface RocketDAOProtocolSettingsNetworkInterface {
    function getNodeConsensusThreshold() external view returns (uint256);
    function getNodePenaltyThreshold() external view returns (uint256);
    function getPerPenaltyRate() external view returns (uint256);
    function getSubmitBalancesEnabled() external view returns (bool);
    function getSubmitBalancesFrequency() external view returns (uint256);
    function getSubmitPricesEnabled() external view returns (bool);
    function getSubmitPricesFrequency() external view returns (uint256);
    function getMinimumNodeFee() external view returns (uint256);
    function getTargetNodeFee() external view returns (uint256);
    function getMaximumNodeFee() external view returns (uint256);
    function getNodeFeeDemandRange() external view returns (uint256);
    function getTargetRethCollateralRate() external view returns (uint256);
    function getRethDepositDelay() external view returns (uint256);
    function getSubmitRewardsEnabled() external view returns (bool);
}
/**
  *       .
  *      / \\
  *     |.'.|
  *     |'.'|
  *   ,'|   |`.
  *  |,-'-|-'-.|
  *   __|_| |         _        _      _____           _
  *  | ___ \\|        | |      | |    | ___ \\         | |
  *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
  *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
  *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
  *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
  * +---------------------------------------------------+
  * |  DECENTRALISED STAKING PROTOCOL FOR ETHEREUM 2.0  |
  * +---------------------------------------------------+
  *
  *  Rocket Pool is a first-of-its-kind ETH2 Proof of Stake protocol, designed to be community owned,
  *  decentralised, trustless and compatible with staking in Ethereum 2.0.
  *
  *  For more information about Rocket Pool, visit https://rocketpool.net
  *
  *  Authors: David Rugendyke, Jake Pospischil, Kane Wallmann, Darren Langley, Joe Clapis, Nick Doherty
  *
  */
pragma solidity >0.5.0 <0.9.0;
// SPDX-License-Identifier: GPL-3.0-only
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
interface RocketTokenRETHInterface is IERC20 {
    function getEthValue(uint256 _rethAmount) external view returns (uint256);
    function getRethValue(uint256 _ethAmount) external view returns (uint256);
    function getExchangeRate() external view returns (uint256);
    function getTotalCollateral() external view returns (uint256);
    function getCollateralRate() external view returns (uint256);
    function depositExcess() external payable;
    function depositExcessCollateral() external;
    function mint(uint256 _ethAmount, address _to) external;
    function burn(uint256 _rethAmount) external;
}
/**
  *       .
  *      / \\
  *     |.'.|
  *     |'.'|
  *   ,'|   |`.
  *  |,-'-|-'-.|
  *   __|_| |         _        _      _____           _
  *  | ___ \\|        | |      | |    | ___ \\         | |
  *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
  *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
  *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
  *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
  * +---------------------------------------------------+
  * |  DECENTRALISED STAKING PROTOCOL FOR ETHEREUM 2.0  |
  * +---------------------------------------------------+
  *
  *  Rocket Pool is a first-of-its-kind ETH2 Proof of Stake protocol, designed to be community owned,
  *  decentralised, trustless and compatible with staking in Ethereum 2.0.
  *
  *  For more information about Rocket Pool, visit https://rocketpool.net
  *
  *  Authors: David Rugendyke, Jake Pospischil, Kane Wallmann, Darren Langley, Joe Clapis, Nick Doherty
  *
  */
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity 0.7.6;
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/math/SignedSafeMath.sol";
import "@openzeppelin/contracts/utils/SafeCast.sol";
import "../RocketBase.sol";
import "../../interface/RocketVaultInterface.sol";
import "../../interface/RocketVaultWithdrawerInterface.sol";
import "../../interface/deposit/RocketDepositPoolInterface.sol";
import "../../interface/minipool/RocketMinipoolInterface.sol";
import "../../interface/minipool/RocketMinipoolQueueInterface.sol";
import "../../interface/dao/protocol/settings/RocketDAOProtocolSettingsDepositInterface.sol";
import "../../interface/dao/protocol/settings/RocketDAOProtocolSettingsMinipoolInterface.sol";
import "../../interface/dao/protocol/settings/RocketDAOProtocolSettingsNetworkInterface.sol";
import "../../interface/token/RocketTokenRETHInterface.sol";
import "../../types/MinipoolDeposit.sol";
/// @notice Accepts user deposits and mints rETH; handles assignment of deposited ETH to minipools
contract RocketDepositPool is RocketBase, RocketDepositPoolInterface, RocketVaultWithdrawerInterface {
    // Libs
    using SafeMath for uint256;
    using SignedSafeMath for int256;
    using SafeCast for uint256;
    // Immutables
    RocketVaultInterface immutable rocketVault;
    RocketTokenRETHInterface immutable rocketTokenRETH;
    // Events
    event DepositReceived(address indexed from, uint256 amount, uint256 time);
    event DepositRecycled(address indexed from, uint256 amount, uint256 time);
    event DepositAssigned(address indexed minipool, uint256 amount, uint256 time);
    event ExcessWithdrawn(address indexed to, uint256 amount, uint256 time);
    // Structs
    struct MinipoolAssignment {
        address minipoolAddress;
        uint256 etherAssigned;
    }
    // Modifiers
    modifier onlyThisLatestContract() {
        // Compiler can optimise out this keccak at compile time
        require(address(this) == getAddress(keccak256("contract.addressrocketDepositPool")), "Invalid or outdated contract");
        _;
    }
    constructor(RocketStorageInterface _rocketStorageAddress) RocketBase(_rocketStorageAddress) {
        version = 3;
        // Pre-retrieve non-upgradable contract addresses to save gas
        rocketVault = RocketVaultInterface(getContractAddress("rocketVault"));
        rocketTokenRETH = RocketTokenRETHInterface(getContractAddress("rocketTokenRETH"));
    }
    /// @notice Returns the current deposit pool balance
    function getBalance() override public view returns (uint256) {
        return rocketVault.balanceOf("rocketDepositPool");
    }
    /// @notice Returns the amount of ETH contributed to the deposit pool by node operators waiting in the queue
    function getNodeBalance() override public view returns (uint256) {
        return getUint("deposit.pool.node.balance");
    }
    /// @notice Returns the user owned portion of the deposit pool (negative indicates more ETH has been "lent" to the
    ///         deposit pool by node operators in the queue than is available from user deposits)
    function getUserBalance() override public view returns (int256) {
        return getBalance().toInt256().sub(getNodeBalance().toInt256());
    }
    /// @notice Excess deposit pool balance (in excess of minipool queue capacity)
    function getExcessBalance() override public view returns (uint256) {
        // Get minipool queue capacity
        RocketMinipoolQueueInterface rocketMinipoolQueue = RocketMinipoolQueueInterface(getContractAddress("rocketMinipoolQueue"));
        uint256 minipoolCapacity = rocketMinipoolQueue.getEffectiveCapacity();
        uint256 balance = getBalance();
        // Calculate and return
        if (minipoolCapacity >= balance) { return 0; }
        else { return balance.sub(minipoolCapacity); }
    }
    /// @dev Callback required to receive ETH withdrawal from the vault
    function receiveVaultWithdrawalETH() override external payable onlyThisLatestContract onlyLatestContract("rocketVault", msg.sender) {}
    /// @notice Deposits ETH into Rocket Pool and mints the corresponding amount of rETH to the caller
    function deposit() override external payable onlyThisLatestContract {
        // Check deposit settings
        RocketDAOProtocolSettingsDepositInterface rocketDAOProtocolSettingsDeposit = RocketDAOProtocolSettingsDepositInterface(getContractAddress("rocketDAOProtocolSettingsDeposit"));
        require(rocketDAOProtocolSettingsDeposit.getDepositEnabled(), "Deposits into Rocket Pool are currently disabled");
        require(msg.value >= rocketDAOProtocolSettingsDeposit.getMinimumDeposit(), "The deposited amount is less than the minimum deposit size");
        /*
            Check if deposit exceeds limit based on current deposit size and minipool queue capacity.
            The deposit pool can, at most, accept a deposit that, after assignments, matches ETH to every minipool in
            the queue and leaves the deposit pool with maximumDepositPoolSize ETH.
            capacityNeeded = depositPoolBalance + msg.value
            maxCapacity = maximumDepositPoolSize + queueEffectiveCapacity
            assert(capacityNeeded <= maxCapacity)
        */
        uint256 capacityNeeded = getBalance().add(msg.value);
        uint256 maxDepositPoolSize = rocketDAOProtocolSettingsDeposit.getMaximumDepositPoolSize();
        if (capacityNeeded > maxDepositPoolSize) {
            // Doing a conditional require() instead of a single one optimises for the common
            // case where capacityNeeded fits in the deposit pool without looking at the queue
            if (rocketDAOProtocolSettingsDeposit.getAssignDepositsEnabled()) {
                RocketMinipoolQueueInterface rocketMinipoolQueue = RocketMinipoolQueueInterface(getContractAddress("rocketMinipoolQueue"));
                require(capacityNeeded <= maxDepositPoolSize.add(rocketMinipoolQueue.getEffectiveCapacity()),
                    "The deposit pool size after depositing (and matching with minipools) exceeds the maximum size");
            } else {
                revert("The deposit pool size after depositing exceeds the maximum size");
            }
        }
        // Calculate deposit fee
        uint256 depositFee = msg.value.mul(rocketDAOProtocolSettingsDeposit.getDepositFee()).div(calcBase);
        uint256 depositNet = msg.value.sub(depositFee);
        // Mint rETH to user account
        rocketTokenRETH.mint(depositNet, msg.sender);
        // Emit deposit received event
        emit DepositReceived(msg.sender, msg.value, block.timestamp);
        // Process deposit
        processDeposit(rocketDAOProtocolSettingsDeposit);
    }
    /// @notice Returns the maximum amount that can be accepted into the deposit pool at this time in wei
    function getMaximumDepositAmount() override external view returns (uint256) {
        RocketDAOProtocolSettingsDepositInterface rocketDAOProtocolSettingsDeposit = RocketDAOProtocolSettingsDepositInterface(getContractAddress("rocketDAOProtocolSettingsDeposit"));
        // If deposits are enabled max deposit is 0
        if (!rocketDAOProtocolSettingsDeposit.getDepositEnabled()) {
            return 0;
        }
        uint256 depositPoolBalance = getBalance();
        uint256 maxCapacity = rocketDAOProtocolSettingsDeposit.getMaximumDepositPoolSize();
        // When assignments are enabled, we can accept the max amount plus whatever space is available in the minipool queue
        if (rocketDAOProtocolSettingsDeposit.getAssignDepositsEnabled()) {
            RocketMinipoolQueueInterface rocketMinipoolQueue = RocketMinipoolQueueInterface(getContractAddress("rocketMinipoolQueue"));
            maxCapacity = maxCapacity.add(rocketMinipoolQueue.getEffectiveCapacity());
        }
        // Check we aren't already over
        if (depositPoolBalance >= maxCapacity) {
            return 0;
        }
        return maxCapacity.sub(depositPoolBalance);
    }
    /// @dev Accepts ETH deposit from the node deposit contract (does not mint rETH)
    /// @param _totalAmount The total node deposit amount including any credit balance used
    function nodeDeposit(uint256 _totalAmount) override external payable onlyThisLatestContract onlyLatestContract("rocketNodeDeposit", msg.sender) {
        // Deposit ETH into the vault
        if (msg.value > 0) {
            rocketVault.depositEther{value: msg.value}();
        }
        // Increase recorded node balance
        addUint("deposit.pool.node.balance", _totalAmount);
    }
    /// @dev Withdraws ETH from the deposit pool to RocketNodeDeposit contract to be used for a new minipool
    /// @param _amount The amount of ETH to withdraw
    function nodeCreditWithdrawal(uint256 _amount) override external onlyThisLatestContract onlyLatestContract("rocketNodeDeposit", msg.sender) {
        // Withdraw ETH from the vault
        rocketVault.withdrawEther(_amount);
        // Send it to msg.sender (function modifier verifies msg.sender is RocketNodeDeposit)
        (bool success, ) = address(msg.sender).call{value: _amount}("");
        require(success, "Failed to send ETH");
    }
    /// @dev Recycle a deposit from a dissolved minipool
    function recycleDissolvedDeposit() override external payable onlyThisLatestContract onlyRegisteredMinipool(msg.sender) {
        // Load contracts
        RocketDAOProtocolSettingsDepositInterface rocketDAOProtocolSettingsDeposit = RocketDAOProtocolSettingsDepositInterface(getContractAddress("rocketDAOProtocolSettingsDeposit"));
        // Recycle ETH
        emit DepositRecycled(msg.sender, msg.value, block.timestamp);
        processDeposit(rocketDAOProtocolSettingsDeposit);
    }
    /// @dev Recycle excess ETH from the rETH token contract
    function recycleExcessCollateral() override external payable onlyThisLatestContract onlyLatestContract("rocketTokenRETH", msg.sender) {
        // Load contracts
        RocketDAOProtocolSettingsDepositInterface rocketDAOProtocolSettingsDeposit = RocketDAOProtocolSettingsDepositInterface(getContractAddress("rocketDAOProtocolSettingsDeposit"));
        // Recycle ETH
        emit DepositRecycled(msg.sender, msg.value, block.timestamp);
        processDeposit(rocketDAOProtocolSettingsDeposit);
    }
    /// @dev Recycle a liquidated RPL stake from a slashed minipool
    function recycleLiquidatedStake() override external payable onlyThisLatestContract onlyLatestContract("rocketAuctionManager", msg.sender) {
        // Load contracts
        RocketDAOProtocolSettingsDepositInterface rocketDAOProtocolSettingsDeposit = RocketDAOProtocolSettingsDepositInterface(getContractAddress("rocketDAOProtocolSettingsDeposit"));
        // Recycle ETH
        emit DepositRecycled(msg.sender, msg.value, block.timestamp);
        processDeposit(rocketDAOProtocolSettingsDeposit);
    }
    /// @dev Process a deposit
    function processDeposit(RocketDAOProtocolSettingsDepositInterface _rocketDAOProtocolSettingsDeposit) private {
        // Transfer ETH to vault
        rocketVault.depositEther{value: msg.value}();
        // Assign deposits if enabled
        _assignDeposits(_rocketDAOProtocolSettingsDeposit);
    }
    /// @notice Assign deposits to available minipools. Reverts if assigning deposits is disabled.
    function assignDeposits() override external onlyThisLatestContract {
        // Load contracts
        RocketDAOProtocolSettingsDepositInterface rocketDAOProtocolSettingsDeposit = RocketDAOProtocolSettingsDepositInterface(getContractAddress("rocketDAOProtocolSettingsDeposit"));
        // Revert if assigning is disabled
        require(_assignDeposits(rocketDAOProtocolSettingsDeposit), "Deposit assignments are currently disabled");
    }
    /// @dev Assign deposits to available minipools. Does nothing if assigning deposits is disabled.
    function maybeAssignDeposits() override external onlyThisLatestContract returns (bool) {
        // Load contracts
        RocketDAOProtocolSettingsDepositInterface rocketDAOProtocolSettingsDeposit = RocketDAOProtocolSettingsDepositInterface(getContractAddress("rocketDAOProtocolSettingsDeposit"));
        // Revert if assigning is disabled
        return _assignDeposits(rocketDAOProtocolSettingsDeposit);
    }
    /// @dev Assigns deposits to available minipools, returns false if assignment is currently disabled
    function _assignDeposits(RocketDAOProtocolSettingsDepositInterface _rocketDAOProtocolSettingsDeposit) private returns (bool) {
        // Check if assigning deposits is enabled
        if (!_rocketDAOProtocolSettingsDeposit.getAssignDepositsEnabled()) {
            return false;
        }
        // Load contracts
        RocketMinipoolQueueInterface rocketMinipoolQueue = RocketMinipoolQueueInterface(getContractAddress("rocketMinipoolQueue"));
        // Decide which queue processing implementation to use based on queue contents
        if (rocketMinipoolQueue.getContainsLegacy()) {
            return _assignDepositsLegacy(rocketMinipoolQueue, _rocketDAOProtocolSettingsDeposit);
        } else {
            return _assignDepositsNew(rocketMinipoolQueue, _rocketDAOProtocolSettingsDeposit);
        }
    }
    /// @dev Assigns deposits using the new minipool queue
    function _assignDepositsNew(RocketMinipoolQueueInterface _rocketMinipoolQueue, RocketDAOProtocolSettingsDepositInterface _rocketDAOProtocolSettingsDeposit) private returns (bool) {
        // Load contracts
        RocketDAOProtocolSettingsMinipoolInterface rocketDAOProtocolSettingsMinipool = RocketDAOProtocolSettingsMinipoolInterface(getContractAddress("rocketDAOProtocolSettingsMinipool"));
        // Calculate the number of minipools to assign
        uint256 maxAssignments = _rocketDAOProtocolSettingsDeposit.getMaximumDepositAssignments();
        uint256 variableDepositAmount = rocketDAOProtocolSettingsMinipool.getVariableDepositAmount();
        uint256 scalingCount = msg.value.div(variableDepositAmount);
        uint256 totalEthCount = getBalance().div(variableDepositAmount);
        uint256 assignments = _rocketDAOProtocolSettingsDeposit.getMaximumDepositSocialisedAssignments().add(scalingCount);
        if (assignments > totalEthCount) {
            assignments = totalEthCount;
        }
        if (assignments > maxAssignments) {
            assignments = maxAssignments;
        }
        address[] memory minipools = _rocketMinipoolQueue.dequeueMinipools(assignments);
        if (minipools.length > 0){
            // Withdraw ETH from vault
            uint256 totalEther = minipools.length.mul(variableDepositAmount);
            rocketVault.withdrawEther(totalEther);
            uint256 nodeBalanceUsed = 0;
            // Loop over minipools and deposit the amount required to reach launch balance
            for (uint256 i = 0; i < minipools.length; i++) {
                RocketMinipoolInterface minipool = RocketMinipoolInterface(minipools[i]);
                // Assign deposit to minipool
                minipool.deposit{value: variableDepositAmount}();
                nodeBalanceUsed = nodeBalanceUsed.add(minipool.getNodeTopUpValue());
                // Emit deposit assigned event
                emit DepositAssigned(minipools[i], variableDepositAmount, block.timestamp);
            }
            // Decrease node balance
            subUint("deposit.pool.node.balance", nodeBalanceUsed);
        }
        return true;
    }
    /// @dev Assigns deposits using the legacy minipool queue
    function _assignDepositsLegacy(RocketMinipoolQueueInterface _rocketMinipoolQueue, RocketDAOProtocolSettingsDepositInterface _rocketDAOProtocolSettingsDeposit) private returns (bool) {
        // Load contracts
        RocketDAOProtocolSettingsMinipoolInterface rocketDAOProtocolSettingsMinipool = RocketDAOProtocolSettingsMinipoolInterface(getContractAddress("rocketDAOProtocolSettingsMinipool"));
        // Setup initial variable values
        uint256 balance = getBalance();
        uint256 totalEther = 0;
        // Calculate minipool assignments
        uint256 maxAssignments = _rocketDAOProtocolSettingsDeposit.getMaximumDepositAssignments();
        MinipoolAssignment[] memory assignments = new MinipoolAssignment[](maxAssignments);
        MinipoolDeposit depositType = MinipoolDeposit.None;
        uint256 count = 0;
        uint256 minipoolCapacity = 0;
        for (uint256 i = 0; i < maxAssignments; ++i) {
            // Optimised for multiple of the same deposit type
            if (count == 0) {
                (depositType, count) = _rocketMinipoolQueue.getNextDepositLegacy();
                if (depositType == MinipoolDeposit.None) { break; }
                minipoolCapacity = rocketDAOProtocolSettingsMinipool.getDepositUserAmount(depositType);
            }
            count--;
            if (minipoolCapacity == 0 || balance.sub(totalEther) < minipoolCapacity) { break; }
            // Dequeue the minipool
            address minipoolAddress = _rocketMinipoolQueue.dequeueMinipoolByDepositLegacy(depositType);
            // Update running total
            totalEther = totalEther.add(minipoolCapacity);
            // Add assignment
            assignments[i].etherAssigned = minipoolCapacity;
            assignments[i].minipoolAddress = minipoolAddress;
        }
        if (totalEther > 0) {
            // Withdraw ETH from vault
            rocketVault.withdrawEther(totalEther);
            // Perform assignments
            for (uint256 i = 0; i < maxAssignments; ++i) {
                if (assignments[i].etherAssigned == 0) { break; }
                RocketMinipoolInterface minipool = RocketMinipoolInterface(assignments[i].minipoolAddress);
                // Assign deposit to minipool
                minipool.userDeposit{value: assignments[i].etherAssigned}();
                // Emit deposit assigned event
                emit DepositAssigned(assignments[i].minipoolAddress, assignments[i].etherAssigned, block.timestamp);
            }
        }
        return true;
    }
    /// @dev Withdraw excess deposit pool balance for rETH collateral
    /// @param _amount The amount of excess ETH to withdraw
    function withdrawExcessBalance(uint256 _amount) override external onlyThisLatestContract onlyLatestContract("rocketTokenRETH", msg.sender) {
        // Check amount
        require(_amount <= getExcessBalance(), "Insufficient excess balance for withdrawal");
        // Withdraw ETH from vault
        rocketVault.withdrawEther(_amount);
        // Transfer to rETH contract
        rocketTokenRETH.depositExcess{value: _amount}();
        // Emit excess withdrawn event
        emit ExcessWithdrawn(msg.sender, _amount, block.timestamp);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        uint256 c = a + b;
        if (c < a) return (false, 0);
        return (true, c);
    }
    /**
     * @dev Returns the substraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b > a) return (false, 0);
        return (true, a - b);
    }
    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) return (true, 0);
        uint256 c = a * b;
        if (c / a != b) return (false, 0);
        return (true, c);
    }
    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b == 0) return (false, 0);
        return (true, a / b);
    }
    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b == 0) return (false, 0);
        return (true, a % b);
    }
    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");
        return c;
    }
    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b <= a, "SafeMath: subtraction overflow");
        return a - b;
    }
    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) return 0;
        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");
        return c;
    }
    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b > 0, "SafeMath: division by zero");
        return a / b;
    }
    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b > 0, "SafeMath: modulo by zero");
        return a % b;
    }
    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        return a - b;
    }
    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryDiv}.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        return a / b;
    }
    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        return a % b;
    }
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
 * @title SignedSafeMath
 * @dev Signed math operations with safety checks that revert on error.
 */
library SignedSafeMath {
    int256 constant private _INT256_MIN = -2**255;
    /**
     * @dev Returns the multiplication of two signed integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(int256 a, int256 b) internal pure returns (int256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) {
            return 0;
        }
        require(!(a == -1 && b == _INT256_MIN), "SignedSafeMath: multiplication overflow");
        int256 c = a * b;
        require(c / a == b, "SignedSafeMath: multiplication overflow");
        return c;
    }
    /**
     * @dev Returns the integer division of two signed integers. Reverts on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(int256 a, int256 b) internal pure returns (int256) {
        require(b != 0, "SignedSafeMath: division by zero");
        require(!(b == -1 && a == _INT256_MIN), "SignedSafeMath: division overflow");
        int256 c = a / b;
        return c;
    }
    /**
     * @dev Returns the subtraction of two signed integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(int256 a, int256 b) internal pure returns (int256) {
        int256 c = a - b;
        require((b >= 0 && c <= a) || (b < 0 && c > a), "SignedSafeMath: subtraction overflow");
        return c;
    }
    /**
     * @dev Returns the addition of two signed integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(int256 a, int256 b) internal pure returns (int256) {
        int256 c = a + b;
        require((b >= 0 && c >= a) || (b < 0 && c < a), "SignedSafeMath: addition overflow");
        return c;
    }
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
 * @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow
 * checks.
 *
 * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can
 * easily result in undesired exploitation or bugs, since developers usually
 * assume that overflows raise errors. `SafeCast` restores this intuition by
 * reverting the transaction when such an operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 *
 * Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing
 * all math on `uint256` and `int256` and then downcasting.
 */
library SafeCast {
    /**
     * @dev Returns the downcasted uint128 from uint256, reverting on
     * overflow (when the input is greater than largest uint128).
     *
     * Counterpart to Solidity's `uint128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     */
    function toUint128(uint256 value) internal pure returns (uint128) {
        require(value < 2**128, "SafeCast: value doesn\\'t fit in 128 bits");
        return uint128(value);
    }
    /**
     * @dev Returns the downcasted uint64 from uint256, reverting on
     * overflow (when the input is greater than largest uint64).
     *
     * Counterpart to Solidity's `uint64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     */
    function toUint64(uint256 value) internal pure returns (uint64) {
        require(value < 2**64, "SafeCast: value doesn\\'t fit in 64 bits");
        return uint64(value);
    }
    /**
     * @dev Returns the downcasted uint32 from uint256, reverting on
     * overflow (when the input is greater than largest uint32).
     *
     * Counterpart to Solidity's `uint32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     */
    function toUint32(uint256 value) internal pure returns (uint32) {
        require(value < 2**32, "SafeCast: value doesn\\'t fit in 32 bits");
        return uint32(value);
    }
    /**
     * @dev Returns the downcasted uint16 from uint256, reverting on
     * overflow (when the input is greater than largest uint16).
     *
     * Counterpart to Solidity's `uint16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     */
    function toUint16(uint256 value) internal pure returns (uint16) {
        require(value < 2**16, "SafeCast: value doesn\\'t fit in 16 bits");
        return uint16(value);
    }
    /**
     * @dev Returns the downcasted uint8 from uint256, reverting on
     * overflow (when the input is greater than largest uint8).
     *
     * Counterpart to Solidity's `uint8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits.
     */
    function toUint8(uint256 value) internal pure returns (uint8) {
        require(value < 2**8, "SafeCast: value doesn\\'t fit in 8 bits");
        return uint8(value);
    }
    /**
     * @dev Converts a signed int256 into an unsigned uint256.
     *
     * Requirements:
     *
     * - input must be greater than or equal to 0.
     */
    function toUint256(int256 value) internal pure returns (uint256) {
        require(value >= 0, "SafeCast: value must be positive");
        return uint256(value);
    }
    /**
     * @dev Returns the downcasted int128 from int256, reverting on
     * overflow (when the input is less than smallest int128 or
     * greater than largest int128).
     *
     * Counterpart to Solidity's `int128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     *
     * _Available since v3.1._
     */
    function toInt128(int256 value) internal pure returns (int128) {
        require(value >= -2**127 && value < 2**127, "SafeCast: value doesn\\'t fit in 128 bits");
        return int128(value);
    }
    /**
     * @dev Returns the downcasted int64 from int256, reverting on
     * overflow (when the input is less than smallest int64 or
     * greater than largest int64).
     *
     * Counterpart to Solidity's `int64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     *
     * _Available since v3.1._
     */
    function toInt64(int256 value) internal pure returns (int64) {
        require(value >= -2**63 && value < 2**63, "SafeCast: value doesn\\'t fit in 64 bits");
        return int64(value);
    }
    /**
     * @dev Returns the downcasted int32 from int256, reverting on
     * overflow (when the input is less than smallest int32 or
     * greater than largest int32).
     *
     * Counterpart to Solidity's `int32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     *
     * _Available since v3.1._
     */
    function toInt32(int256 value) internal pure returns (int32) {
        require(value >= -2**31 && value < 2**31, "SafeCast: value doesn\\'t fit in 32 bits");
        return int32(value);
    }
    /**
     * @dev Returns the downcasted int16 from int256, reverting on
     * overflow (when the input is less than smallest int16 or
     * greater than largest int16).
     *
     * Counterpart to Solidity's `int16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     *
     * _Available since v3.1._
     */
    function toInt16(int256 value) internal pure returns (int16) {
        require(value >= -2**15 && value < 2**15, "SafeCast: value doesn\\'t fit in 16 bits");
        return int16(value);
    }
    /**
     * @dev Returns the downcasted int8 from int256, reverting on
     * overflow (when the input is less than smallest int8 or
     * greater than largest int8).
     *
     * Counterpart to Solidity's `int8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits.
     *
     * _Available since v3.1._
     */
    function toInt8(int256 value) internal pure returns (int8) {
        require(value >= -2**7 && value < 2**7, "SafeCast: value doesn\\'t fit in 8 bits");
        return int8(value);
    }
    /**
     * @dev Converts an unsigned uint256 into a signed int256.
     *
     * Requirements:
     *
     * - input must be less than or equal to maxInt256.
     */
    function toInt256(uint256 value) internal pure returns (int256) {
        require(value < 2**255, "SafeCast: value doesn't fit in an int256");
        return int256(value);
    }
}
/**
  *       .
  *      / \\
  *     |.'.|
  *     |'.'|
  *   ,'|   |`.
  *  |,-'-|-'-.|
  *   __|_| |         _        _      _____           _
  *  | ___ \\|        | |      | |    | ___ \\         | |
  *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
  *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
  *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
  *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
  * +---------------------------------------------------+
  * |  DECENTRALISED STAKING PROTOCOL FOR ETHEREUM 2.0  |
  * +---------------------------------------------------+
  *
  *  Rocket Pool is a first-of-its-kind ETH2 Proof of Stake protocol, designed to be community owned,
  *  decentralised, trustless and compatible with staking in Ethereum 2.0.
  *
  *  For more information about Rocket Pool, visit https://rocketpool.net
  *
  *  Authors: David Rugendyke, Jake Pospischil, Kane Wallmann, Darren Langley, Joe Clapis, Nick Doherty
  *
  */
pragma solidity >0.5.0 <0.9.0;
// SPDX-License-Identifier: GPL-3.0-only
interface RocketStorageInterface {
    // Deploy status
    function getDeployedStatus() external view returns (bool);
    // Guardian
    function getGuardian() external view returns(address);
    function setGuardian(address _newAddress) external;
    function confirmGuardian() external;
    // Getters
    function getAddress(bytes32 _key) external view returns (address);
    function getUint(bytes32 _key) external view returns (uint);
    function getString(bytes32 _key) external view returns (string memory);
    function getBytes(bytes32 _key) external view returns (bytes memory);
    function getBool(bytes32 _key) external view returns (bool);
    function getInt(bytes32 _key) external view returns (int);
    function getBytes32(bytes32 _key) external view returns (bytes32);
    // Setters
    function setAddress(bytes32 _key, address _value) external;
    function setUint(bytes32 _key, uint _value) external;
    function setString(bytes32 _key, string calldata _value) external;
    function setBytes(bytes32 _key, bytes calldata _value) external;
    function setBool(bytes32 _key, bool _value) external;
    function setInt(bytes32 _key, int _value) external;
    function setBytes32(bytes32 _key, bytes32 _value) external;
    // Deleters
    function deleteAddress(bytes32 _key) external;
    function deleteUint(bytes32 _key) external;
    function deleteString(bytes32 _key) external;
    function deleteBytes(bytes32 _key) external;
    function deleteBool(bytes32 _key) external;
    function deleteInt(bytes32 _key) external;
    function deleteBytes32(bytes32 _key) external;
    // Arithmetic
    function addUint(bytes32 _key, uint256 _amount) external;
    function subUint(bytes32 _key, uint256 _amount) external;
    // Protected storage
    function getNodeWithdrawalAddress(address _nodeAddress) external view returns (address);
    function getNodePendingWithdrawalAddress(address _nodeAddress) external view returns (address);
    function setWithdrawalAddress(address _nodeAddress, address _newWithdrawalAddress, bool _confirm) external;
    function confirmWithdrawalAddress(address _nodeAddress) external;
}
/**
  *       .
  *      / \\
  *     |.'.|
  *     |'.'|
  *   ,'|   |`.
  *  |,-'-|-'-.|
  *   __|_| |         _        _      _____           _
  *  | ___ \\|        | |      | |    | ___ \\         | |
  *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
  *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
  *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
  *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
  * +---------------------------------------------------+
  * |  DECENTRALISED STAKING PROTOCOL FOR ETHEREUM 2.0  |
  * +---------------------------------------------------+
  *
  *  Rocket Pool is a first-of-its-kind ETH2 Proof of Stake protocol, designed to be community owned,
  *  decentralised, trustless and compatible with staking in Ethereum 2.0.
  *
  *  For more information about Rocket Pool, visit https://rocketpool.net
  *
  *  Authors: David Rugendyke, Jake Pospischil, Kane Wallmann, Darren Langley, Joe Clapis, Nick Doherty
  *
  */
pragma solidity 0.7.6;
// SPDX-License-Identifier: GPL-3.0-only
import "../interface/RocketStorageInterface.sol";
/// @title Base settings / modifiers for each contract in Rocket Pool
/// @author David Rugendyke
abstract contract RocketBase {
    // Calculate using this as the base
    uint256 constant calcBase = 1 ether;
    // Version of the contract
    uint8 public version;
    // The main storage contract where primary persistant storage is maintained
    RocketStorageInterface rocketStorage = RocketStorageInterface(0);
    /*** Modifiers **********************************************************/
    /**
    * @dev Throws if called by any sender that doesn't match a Rocket Pool network contract
    */
    modifier onlyLatestNetworkContract() {
        require(getBool(keccak256(abi.encodePacked("contract.exists", msg.sender))), "Invalid or outdated network contract");
        _;
    }
    /**
    * @dev Throws if called by any sender that doesn't match one of the supplied contract or is the latest version of that contract
    */
    modifier onlyLatestContract(string memory _contractName, address _contractAddress) {
        require(_contractAddress == getAddress(keccak256(abi.encodePacked("contract.address", _contractName))), "Invalid or outdated contract");
        _;
    }
    /**
    * @dev Throws if called by any sender that isn't a registered node
    */
    modifier onlyRegisteredNode(address _nodeAddress) {
        require(getBool(keccak256(abi.encodePacked("node.exists", _nodeAddress))), "Invalid node");
        _;
    }
    /**
    * @dev Throws if called by any sender that isn't a trusted node DAO member
    */
    modifier onlyTrustedNode(address _nodeAddress) {
        require(getBool(keccak256(abi.encodePacked("dao.trustednodes.", "member", _nodeAddress))), "Invalid trusted node");
        _;
    }
    /**
    * @dev Throws if called by any sender that isn't a registered minipool
    */
    modifier onlyRegisteredMinipool(address _minipoolAddress) {
        require(getBool(keccak256(abi.encodePacked("minipool.exists", _minipoolAddress))), "Invalid minipool");
        _;
    }
    
    /**
    * @dev Throws if called by any account other than a guardian account (temporary account allowed access to settings before DAO is fully enabled)
    */
    modifier onlyGuardian() {
        require(msg.sender == rocketStorage.getGuardian(), "Account is not a temporary guardian");
        _;
    }
    /*** Methods **********************************************************/
    /// @dev Set the main Rocket Storage address
    constructor(RocketStorageInterface _rocketStorageAddress) {
        // Update the contract address
        rocketStorage = RocketStorageInterface(_rocketStorageAddress);
    }
    /// @dev Get the address of a network contract by name
    function getContractAddress(string memory _contractName) internal view returns (address) {
        // Get the current contract address
        address contractAddress = getAddress(keccak256(abi.encodePacked("contract.address", _contractName)));
        // Check it
        require(contractAddress != address(0x0), "Contract not found");
        // Return
        return contractAddress;
    }
    /// @dev Get the address of a network contract by name (returns address(0x0) instead of reverting if contract does not exist)
    function getContractAddressUnsafe(string memory _contractName) internal view returns (address) {
        // Get the current contract address
        address contractAddress = getAddress(keccak256(abi.encodePacked("contract.address", _contractName)));
        // Return
        return contractAddress;
    }
    /// @dev Get the name of a network contract by address
    function getContractName(address _contractAddress) internal view returns (string memory) {
        // Get the contract name
        string memory contractName = getString(keccak256(abi.encodePacked("contract.name", _contractAddress)));
        // Check it
        require(bytes(contractName).length > 0, "Contract not found");
        // Return
        return contractName;
    }
    /// @dev Get revert error message from a .call method
    function getRevertMsg(bytes memory _returnData) internal pure returns (string memory) {
        // If the _res length is less than 68, then the transaction failed silently (without a revert message)
        if (_returnData.length < 68) return "Transaction reverted silently";
        assembly {
            // Slice the sighash.
            _returnData := add(_returnData, 0x04)
        }
        return abi.decode(_returnData, (string)); // All that remains is the revert string
    }
    /*** Rocket Storage Methods ****************************************/
    // Note: Unused helpers have been removed to keep contract sizes down
    /// @dev Storage get methods
    function getAddress(bytes32 _key) internal view returns (address) { return rocketStorage.getAddress(_key); }
    function getUint(bytes32 _key) internal view returns (uint) { return rocketStorage.getUint(_key); }
    function getString(bytes32 _key) internal view returns (string memory) { return rocketStorage.getString(_key); }
    function getBytes(bytes32 _key) internal view returns (bytes memory) { return rocketStorage.getBytes(_key); }
    function getBool(bytes32 _key) internal view returns (bool) { return rocketStorage.getBool(_key); }
    function getInt(bytes32 _key) internal view returns (int) { return rocketStorage.getInt(_key); }
    function getBytes32(bytes32 _key) internal view returns (bytes32) { return rocketStorage.getBytes32(_key); }
    /// @dev Storage set methods
    function setAddress(bytes32 _key, address _value) internal { rocketStorage.setAddress(_key, _value); }
    function setUint(bytes32 _key, uint _value) internal { rocketStorage.setUint(_key, _value); }
    function setString(bytes32 _key, string memory _value) internal { rocketStorage.setString(_key, _value); }
    function setBytes(bytes32 _key, bytes memory _value) internal { rocketStorage.setBytes(_key, _value); }
    function setBool(bytes32 _key, bool _value) internal { rocketStorage.setBool(_key, _value); }
    function setInt(bytes32 _key, int _value) internal { rocketStorage.setInt(_key, _value); }
    function setBytes32(bytes32 _key, bytes32 _value) internal { rocketStorage.setBytes32(_key, _value); }
    /// @dev Storage delete methods
    function deleteAddress(bytes32 _key) internal { rocketStorage.deleteAddress(_key); }
    function deleteUint(bytes32 _key) internal { rocketStorage.deleteUint(_key); }
    function deleteString(bytes32 _key) internal { rocketStorage.deleteString(_key); }
    function deleteBytes(bytes32 _key) internal { rocketStorage.deleteBytes(_key); }
    function deleteBool(bytes32 _key) internal { rocketStorage.deleteBool(_key); }
    function deleteInt(bytes32 _key) internal { rocketStorage.deleteInt(_key); }
    function deleteBytes32(bytes32 _key) internal { rocketStorage.deleteBytes32(_key); }
    /// @dev Storage arithmetic methods
    function addUint(bytes32 _key, uint256 _amount) internal { rocketStorage.addUint(_key, _amount); }
    function subUint(bytes32 _key, uint256 _amount) internal { rocketStorage.subUint(_key, _amount); }
}
/**
  *       .
  *      / \\
  *     |.'.|
  *     |'.'|
  *   ,'|   |`.
  *  |,-'-|-'-.|
  *   __|_| |         _        _      _____           _
  *  | ___ \\|        | |      | |    | ___ \\         | |
  *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
  *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
  *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
  *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
  * +---------------------------------------------------+
  * |  DECENTRALISED STAKING PROTOCOL FOR ETHEREUM 2.0  |
  * +---------------------------------------------------+
  *
  *  Rocket Pool is a first-of-its-kind ETH2 Proof of Stake protocol, designed to be community owned,
  *  decentralised, trustless and compatible with staking in Ethereum 2.0.
  *
  *  For more information about Rocket Pool, visit https://rocketpool.net
  *
  *  Authors: David Rugendyke, Jake Pospischil, Kane Wallmann, Darren Langley, Joe Clapis, Nick Doherty
  *
  */
pragma solidity 0.7.6;
// SPDX-License-Identifier: GPL-3.0-only
// Represents the type of deposits required by a minipool
enum MinipoolDeposit {
    None,       // Marks an invalid deposit type
    Full,       // The minipool requires 32 ETH from the node operator, 16 ETH of which will be refinanced from user deposits
    Half,       // The minipool required 16 ETH from the node operator to be matched with 16 ETH from user deposits
    Empty,      // The minipool requires 0 ETH from the node operator to be matched with 32 ETH from user deposits (trusted nodes only)
    Variable    // Indicates this minipool is of the new generation that supports a variable deposit amount
}
/**
  *       .
  *      / \\
  *     |.'.|
  *     |'.'|
  *   ,'|   |`.
  *  |,-'-|-'-.|
  *   __|_| |         _        _      _____           _
  *  | ___ \\|        | |      | |    | ___ \\         | |
  *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
  *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
  *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
  *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
  * +---------------------------------------------------+
  * |  DECENTRALISED STAKING PROTOCOL FOR ETHEREUM 2.0  |
  * +---------------------------------------------------+
  *
  *  Rocket Pool is a first-of-its-kind ETH2 Proof of Stake protocol, designed to be community owned,
  *  decentralised, trustless and compatible with staking in Ethereum 2.0.
  *
  *  For more information about Rocket Pool, visit https://rocketpool.net
  *
  *  Authors: David Rugendyke, Jake Pospischil, Kane Wallmann, Darren Langley, Joe Clapis, Nick Doherty
  *
  */
pragma solidity 0.7.6;
// SPDX-License-Identifier: GPL-3.0-only
// Represents a minipool's status within the network
enum MinipoolStatus {
    Initialised,    // The minipool has been initialised and is awaiting a deposit of user ETH
    Prelaunch,      // The minipool has enough ETH to begin staking and is awaiting launch by the node operator
    Staking,        // The minipool is currently staking
    Withdrawable,   // NO LONGER USED
    Dissolved       // The minipool has been dissolved and its user deposited ETH has been returned to the deposit pool
}
/**
  *       .
  *      / \\
  *     |.'.|
  *     |'.'|
  *   ,'|   |`.
  *  |,-'-|-'-.|
  *   __|_| |         _        _      _____           _
  *  | ___ \\|        | |      | |    | ___ \\         | |
  *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
  *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
  *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
  *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
  * +---------------------------------------------------+
  * |  DECENTRALISED STAKING PROTOCOL FOR ETHEREUM 2.0  |
  * +---------------------------------------------------+
  *
  *  Rocket Pool is a first-of-its-kind ETH2 Proof of Stake protocol, designed to be community owned,
  *  decentralised, trustless and compatible with staking in Ethereum 2.0.
  *
  *  For more information about Rocket Pool, visit https://rocketpool.net
  *
  *  Authors: David Rugendyke, Jake Pospischil, Kane Wallmann, Darren Langley, Joe Clapis, Nick Doherty
  *
  */
pragma solidity >0.5.0 <0.9.0;
// SPDX-License-Identifier: GPL-3.0-only
import "../../types/MinipoolDeposit.sol";
import "../../types/MinipoolStatus.sol";
import "../RocketStorageInterface.sol";
interface RocketMinipoolInterface {
    function version() external view returns (uint8);
    function initialise(address _nodeAddress) external;
    function getStatus() external view returns (MinipoolStatus);
    function getFinalised() external view returns (bool);
    function getStatusBlock() external view returns (uint256);
    function getStatusTime() external view returns (uint256);
    function getScrubVoted(address _member) external view returns (bool);
    function getDepositType() external view returns (MinipoolDeposit);
    function getNodeAddress() external view returns (address);
    function getNodeFee() external view returns (uint256);
    function getNodeDepositBalance() external view returns (uint256);
    function getNodeRefundBalance() external view returns (uint256);
    function getNodeDepositAssigned() external view returns (bool);
    function getPreLaunchValue() external view returns (uint256);
    function getNodeTopUpValue() external view returns (uint256);
    function getVacant() external view returns (bool);
    function getPreMigrationBalance() external view returns (uint256);
    function getUserDistributed() external view returns (bool);
    function getUserDepositBalance() external view returns (uint256);
    function getUserDepositAssigned() external view returns (bool);
    function getUserDepositAssignedTime() external view returns (uint256);
    function getTotalScrubVotes() external view returns (uint256);
    function calculateNodeShare(uint256 _balance) external view returns (uint256);
    function calculateUserShare(uint256 _balance) external view returns (uint256);
    function preDeposit(uint256 _bondingValue, bytes calldata _validatorPubkey, bytes calldata _validatorSignature, bytes32 _depositDataRoot) external payable;
    function deposit() external payable;
    function userDeposit() external payable;
    function distributeBalance(bool _rewardsOnly) external;
    function beginUserDistribute() external;
    function userDistributeAllowed() external view returns (bool);
    function refund() external;
    function slash() external;
    function finalise() external;
    function canStake() external view returns (bool);
    function canPromote() external view returns (bool);
    function stake(bytes calldata _validatorSignature, bytes32 _depositDataRoot) external;
    function prepareVacancy(uint256 _bondAmount, uint256 _currentBalance) external;
    function promote() external;
    function dissolve() external;
    function close() external;
    function voteScrub() external;
    function reduceBondAmount() external;
}
/**
  *       .
  *      / \\
  *     |.'.|
  *     |'.'|
  *   ,'|   |`.
  *  |,-'-|-'-.|
  *   __|_| |         _        _      _____           _
  *  | ___ \\|        | |      | |    | ___ \\         | |
  *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
  *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
  *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
  *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
  * +---------------------------------------------------+
  * |  DECENTRALISED STAKING PROTOCOL FOR ETHEREUM 2.0  |
  * +---------------------------------------------------+
  *
  *  Rocket Pool is a first-of-its-kind ETH2 Proof of Stake protocol, designed to be community owned,
  *  decentralised, trustless and compatible with staking in Ethereum 2.0.
  *
  *  For more information about Rocket Pool, visit https://rocketpool.net
  *
  *  Authors: David Rugendyke, Jake Pospischil, Kane Wallmann, Darren Langley, Joe Clapis, Nick Doherty
  *
  */
pragma solidity >0.5.0 <0.9.0;
// SPDX-License-Identifier: GPL-3.0-only
import "../../types/MinipoolDeposit.sol";
interface RocketMinipoolQueueInterface {
    function getTotalLength() external view returns (uint256);
    function getContainsLegacy() external view returns (bool);
    function getLengthLegacy(MinipoolDeposit _depositType) external view returns (uint256);
    function getLength() external view returns (uint256);
    function getTotalCapacity() external view returns (uint256);
    function getEffectiveCapacity() external view returns (uint256);
    function getNextCapacityLegacy() external view returns (uint256);
    function getNextDepositLegacy() external view returns (MinipoolDeposit, uint256);
    function enqueueMinipool(address _minipool) external;
    function dequeueMinipoolByDepositLegacy(MinipoolDeposit _depositType) external returns (address minipoolAddress);
    function dequeueMinipools(uint256 _maxToDequeue) external returns (address[] memory minipoolAddress);
    function removeMinipool(MinipoolDeposit _depositType) external;
    function getMinipoolAt(uint256 _index) external view returns(address);
    function getMinipoolPosition(address _minipool) external view returns (int256);
}
/**
  *       .
  *      / \\
  *     |.'.|
  *     |'.'|
  *   ,'|   |`.
  *  |,-'-|-'-.|
  *   __|_| |         _        _      _____           _
  *  | ___ \\|        | |      | |    | ___ \\         | |
  *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
  *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
  *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
  *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
  * +---------------------------------------------------+
  * |  DECENTRALISED STAKING PROTOCOL FOR ETHEREUM 2.0  |
  * +---------------------------------------------------+
  *
  *  Rocket Pool is a first-of-its-kind ETH2 Proof of Stake protocol, designed to be community owned,
  *  decentralised, trustless and compatible with staking in Ethereum 2.0.
  *
  *  For more information about Rocket Pool, visit https://rocketpool.net
  *
  *  Authors: David Rugendyke, Jake Pospischil, Kane Wallmann, Darren Langley, Joe Clapis, Nick Doherty
  *
  */
pragma solidity >0.5.0 <0.9.0;
// SPDX-License-Identifier: GPL-3.0-only
import "../../../../types/MinipoolDeposit.sol";
interface RocketDAOProtocolSettingsMinipoolInterface {
    function getLaunchBalance() external view returns (uint256);
    function getPreLaunchValue() external pure returns (uint256);
    function getDepositUserAmount(MinipoolDeposit _depositType) external view returns (uint256);
    function getFullDepositUserAmount() external view returns (uint256);
    function getHalfDepositUserAmount() external view returns (uint256);
    function getVariableDepositAmount() external view returns (uint256);
    function getSubmitWithdrawableEnabled() external view returns (bool);
    function getBondReductionEnabled() external view returns (bool);
    function getLaunchTimeout() external view returns (uint256);
    function getMaximumCount() external view returns (uint256);
    function isWithinUserDistributeWindow(uint256 _time) external view returns (bool);
    function hasUserDistributeWindowPassed(uint256 _time) external view returns (bool);
    function getUserDistributeWindowStart() external view returns (uint256);
    function getUserDistributeWindowLength() external view returns (uint256);
}
/**
  *       .
  *      / \\
  *     |.'.|
  *     |'.'|
  *   ,'|   |`.
  *  |,-'-|-'-.|
  *   __|_| |         _        _      _____           _
  *  | ___ \\|        | |      | |    | ___ \\         | |
  *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
  *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
  *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
  *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
  * +---------------------------------------------------+
  * |  DECENTRALISED STAKING PROTOCOL FOR ETHEREUM 2.0  |
  * +---------------------------------------------------+
  *
  *  Rocket Pool is a first-of-its-kind ETH2 Proof of Stake protocol, designed to be community owned,
  *  decentralised, trustless and compatible with staking in Ethereum 2.0.
  *
  *  For more information about Rocket Pool, visit https://rocketpool.net
  *
  *  Authors: David Rugendyke, Jake Pospischil, Kane Wallmann, Darren Langley, Joe Clapis, Nick Doherty
  *
  */
pragma solidity >0.5.0 <0.9.0;
// SPDX-License-Identifier: GPL-3.0-only
interface AddressQueueStorageInterface {
    function getLength(bytes32 _key) external view returns (uint);
    function getItem(bytes32 _key, uint _index) external view returns (address);
    function getIndexOf(bytes32 _key, address _value) external view returns (int);
    function enqueueItem(bytes32 _key, address _value) external;
    function dequeueItem(bytes32 _key) external returns (address);
    function removeItem(bytes32 _key, address _value) external;
}
/**
  *       .
  *      / \\
  *     |.'.|
  *     |'.'|
  *   ,'|   |`.
  *  |,-'-|-'-.|
  *   __|_| |         _        _      _____           _
  *  | ___ \\|        | |      | |    | ___ \\         | |
  *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
  *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
  *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
  *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
  * +---------------------------------------------------+
  * |  DECENTRALISED STAKING PROTOCOL FOR ETHEREUM 2.0  |
  * +---------------------------------------------------+
  *
  *  Rocket Pool is a first-of-its-kind ETH2 Proof of Stake protocol, designed to be community owned,
  *  decentralised, trustless and compatible with staking in Ethereum 2.0.
  *
  *  For more information about Rocket Pool, visit https://rocketpool.net
  *
  *  Authors: David Rugendyke, Jake Pospischil, Kane Wallmann, Darren Langley, Joe Clapis, Nick Doherty
  *
  */
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity 0.7.6;
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/math/SignedSafeMath.sol";
import "@openzeppelin/contracts/utils/SafeCast.sol";
import "../RocketBase.sol";
import "../../interface/minipool/RocketMinipoolInterface.sol";
import "../../interface/minipool/RocketMinipoolQueueInterface.sol";
import "../../interface/dao/protocol/settings/RocketDAOProtocolSettingsMinipoolInterface.sol";
import "../../interface/util/AddressQueueStorageInterface.sol";
import "../../types/MinipoolDeposit.sol";
/// @notice Minipool queueing for deposit assignment
contract RocketMinipoolQueue is RocketBase, RocketMinipoolQueueInterface {
    // Libs
    using SafeMath for uint;
    using SignedSafeMath for int;
    // Constants
    bytes32 private constant queueKeyFull = keccak256("minipools.available.full");
    bytes32 private constant queueKeyHalf = keccak256("minipools.available.half");
    bytes32 private constant queueKeyVariable = keccak256("minipools.available.variable");
    // Events
    event MinipoolEnqueued(address indexed minipool, bytes32 indexed queueId, uint256 time);
    event MinipoolDequeued(address indexed minipool, bytes32 indexed queueId, uint256 time);
    event MinipoolRemoved(address indexed minipool, bytes32 indexed queueId, uint256 time);
    constructor(RocketStorageInterface _rocketStorageAddress) RocketBase(_rocketStorageAddress) {
        version = 2;
    }
    /// @notice Get the total combined length of the queues
    function getTotalLength() override external view returns (uint256) {
        return (
            getLengthLegacy(queueKeyFull)
        ).add(
            getLengthLegacy(queueKeyHalf)
        ).add(
            getLength()
        );
    }
    /// @notice Returns true if there are any legacy minipools in the queue
    function getContainsLegacy() override external view returns (bool) {
        return getLengthLegacy(queueKeyFull).add(getLengthLegacy(queueKeyHalf)) > 0;
    }
    /// @notice Get the length of a given queue. Returns 0 for invalid queues
    /// @param _depositType Which queue to query the length of
    function getLengthLegacy(MinipoolDeposit _depositType) override external view returns (uint256) {
        if (_depositType == MinipoolDeposit.Full) { return getLengthLegacy(queueKeyFull); }
        if (_depositType == MinipoolDeposit.Half) { return getLengthLegacy(queueKeyHalf); }
        return 0;
    }
    /// @dev Returns a queue length by internal key representation
    /// @param _key The internal key representation of the queue to query the length of
    function getLengthLegacy(bytes32 _key) private view returns (uint256) {
        AddressQueueStorageInterface addressQueueStorage = AddressQueueStorageInterface(getContractAddress("addressQueueStorage"));
        return addressQueueStorage.getLength(_key);
    }
    /// @notice Gets the length of the variable (global) queue
    function getLength() override public view returns (uint256) {
        AddressQueueStorageInterface addressQueueStorage = AddressQueueStorageInterface(getContractAddress("addressQueueStorage"));
        return addressQueueStorage.getLength(queueKeyVariable);
    }
    /// @notice Get the total combined capacity of the queues
    function getTotalCapacity() override external view returns (uint256) {
        RocketDAOProtocolSettingsMinipoolInterface rocketDAOProtocolSettingsMinipool = RocketDAOProtocolSettingsMinipoolInterface(getContractAddress("rocketDAOProtocolSettingsMinipool"));
        return (
            getLengthLegacy(queueKeyFull).mul(rocketDAOProtocolSettingsMinipool.getFullDepositUserAmount())
        ).add(
            getLengthLegacy(queueKeyHalf).mul(rocketDAOProtocolSettingsMinipool.getHalfDepositUserAmount())
        ).add(
            getVariableCapacity()
        );
    }
    /// @notice Get the total effective capacity of the queues (used in node demand calculation)
    function getEffectiveCapacity() override external view returns (uint256) {
        RocketDAOProtocolSettingsMinipoolInterface rocketDAOProtocolSettingsMinipool = RocketDAOProtocolSettingsMinipoolInterface(getContractAddress("rocketDAOProtocolSettingsMinipool"));
        return (
            getLengthLegacy(queueKeyFull).mul(rocketDAOProtocolSettingsMinipool.getFullDepositUserAmount())
        ).add(
            getLengthLegacy(queueKeyHalf).mul(rocketDAOProtocolSettingsMinipool.getHalfDepositUserAmount())
        ).add(
            getVariableCapacity()
        );
    }
    /// @dev Get the ETH capacity of the variable queue
    function getVariableCapacity() internal view returns (uint256) {
        RocketDAOProtocolSettingsMinipoolInterface rocketDAOProtocolSettingsMinipool = RocketDAOProtocolSettingsMinipoolInterface(getContractAddress("rocketDAOProtocolSettingsMinipool"));
        return getLength().mul(rocketDAOProtocolSettingsMinipool.getVariableDepositAmount());
    }
    /// @notice Get the capacity of the next available minipool. Returns 0 if no minipools are available
    function getNextCapacityLegacy() override external view returns (uint256) {
        RocketDAOProtocolSettingsMinipoolInterface rocketDAOProtocolSettingsMinipool = RocketDAOProtocolSettingsMinipoolInterface(getContractAddress("rocketDAOProtocolSettingsMinipool"));
        if (getLengthLegacy(queueKeyHalf) > 0) { return rocketDAOProtocolSettingsMinipool.getHalfDepositUserAmount(); }
        if (getLengthLegacy(queueKeyFull) > 0) { return rocketDAOProtocolSettingsMinipool.getFullDepositUserAmount(); }
        return 0;
    }
    /// @notice Get the deposit type of the next available minipool and the number of deposits in that queue.
    ///         Returns None if no minipools are available
    function getNextDepositLegacy() override external view returns (MinipoolDeposit, uint256) {
        uint256 length = getLengthLegacy(queueKeyHalf);
        if (length > 0) { return (MinipoolDeposit.Half, length); }
        length = getLengthLegacy(queueKeyFull);
        if (length > 0) { return (MinipoolDeposit.Full, length); }
        return (MinipoolDeposit.None, 0);
    }
    /// @dev Add a minipool to the end of the appropriate queue. Only accepts calls from the RocketMinipoolManager contract
    /// @param _minipool Address of the minipool to add to the queue
    function enqueueMinipool(address _minipool) override external onlyLatestContract("rocketMinipoolQueue", address(this)) onlyLatestContract("rocketNodeDeposit", msg.sender) {
        // Enqueue
        AddressQueueStorageInterface addressQueueStorage = AddressQueueStorageInterface(getContractAddress("addressQueueStorage"));
        addressQueueStorage.enqueueItem(queueKeyVariable, _minipool);
        // Emit enqueued event
        emit MinipoolEnqueued(_minipool, queueKeyVariable, block.timestamp);
    }
    /// @dev Dequeues a minipool from a legacy queue
    /// @param _depositType The queue to dequeue a minipool from
    function dequeueMinipoolByDepositLegacy(MinipoolDeposit _depositType) override external onlyLatestContract("rocketMinipoolQueue", address(this)) onlyLatestContract("rocketDepositPool", msg.sender) returns (address minipoolAddress) {
        if (_depositType == MinipoolDeposit.Half) { return dequeueMinipool(queueKeyHalf); }
        if (_depositType == MinipoolDeposit.Full) { return dequeueMinipool(queueKeyFull); }
        require(false, "No minipools are available");
    }
    /// @dev Dequeues multiple minipools from the variable queue and returns them all
    /// @param _maxToDequeue The maximum number of items to dequeue
    function dequeueMinipools(uint256 _maxToDequeue) override external onlyLatestContract("rocketMinipoolQueue", address(this)) onlyLatestContract("rocketDepositPool", msg.sender) returns (address[] memory minipoolAddress) {
        uint256 queueLength = getLength();
        uint256 count = _maxToDequeue;
        if (count > queueLength) {
            count = queueLength;
        }
        address[] memory minipoolAddresses = new address[](count);
        for (uint256 i = 0; i < count; i++) {
            RocketMinipoolInterface minipool = RocketMinipoolInterface(dequeueMinipool(queueKeyVariable));
            minipoolAddresses[i] = address(minipool);
        }
        return minipoolAddresses;
    }
    /// @dev Dequeues a minipool from a queue given an internal key
    /// @param _key The internal key representation of the queue from which to dequeue a minipool from
    function dequeueMinipool(bytes32 _key) private returns (address) {
        // Dequeue
        AddressQueueStorageInterface addressQueueStorage = AddressQueueStorageInterface(getContractAddress("addressQueueStorage"));
        address minipool = addressQueueStorage.dequeueItem(_key);
        // Emit dequeued event
        emit MinipoolDequeued(minipool, _key, block.timestamp);
        // Return
        return minipool;
    }
    /// @dev Remove a minipool from a queue. Only accepts calls from registered minipools
    function removeMinipool(MinipoolDeposit _depositType) override external onlyLatestContract("rocketMinipoolQueue", address(this)) onlyRegisteredMinipool(msg.sender) {
        // Remove minipool from queue
        if (_depositType == MinipoolDeposit.Half) { return removeMinipool(queueKeyHalf, msg.sender); }
        if (_depositType == MinipoolDeposit.Full) { return removeMinipool(queueKeyFull, msg.sender); }
        if (_depositType == MinipoolDeposit.Variable) { return removeMinipool(queueKeyVariable, msg.sender); }
        require(false, "Invalid minipool deposit type");
    }
    /// @dev Removes a minipool from a queue given an internal key
    /// @param _key The internal key representation of the queue from which to remove a minipool from
    /// @param _minipool The address of a minipool to remove from the specified queue
    function removeMinipool(bytes32 _key, address _minipool) private {
        // Remove
        AddressQueueStorageInterface addressQueueStorage = AddressQueueStorageInterface(getContractAddress("addressQueueStorage"));
        addressQueueStorage.removeItem(_key, _minipool);
        // Emit removed event
        emit MinipoolRemoved(_minipool, _key, block.timestamp);
    }
    /// @notice Returns the minipool address of the minipool in the global queue at a given index
    /// @param _index The index into the queue to retrieve
    function getMinipoolAt(uint256 _index) override external view returns(address) {
        AddressQueueStorageInterface addressQueueStorage = AddressQueueStorageInterface(getContractAddress("addressQueueStorage"));
        // Check if index is in the half queue
        uint256 halfLength = addressQueueStorage.getLength(queueKeyHalf);
        if (_index < halfLength) {
            return addressQueueStorage.getItem(queueKeyHalf, _index);
        }
        _index = _index.sub(halfLength);
        // Check if index is in the full queue
        uint256 fullLength = addressQueueStorage.getLength(queueKeyFull);
        if (_index < fullLength) {
            return addressQueueStorage.getItem(queueKeyFull, _index);
        }
        _index = _index.sub(fullLength);
        // Check if index is in the full queue
        uint256 variableLength = addressQueueStorage.getLength(queueKeyVariable);
        if (_index < variableLength) {
            return addressQueueStorage.getItem(queueKeyVariable, _index);
        }
        // Index is out of bounds
        return address(0);
    }
    /// @notice Returns the position a given minipool is in the queue
    /// @param _minipool The minipool to query the position of
    function getMinipoolPosition(address _minipool) override external view returns (int256) {
        AddressQueueStorageInterface addressQueueStorage = AddressQueueStorageInterface(getContractAddress("addressQueueStorage"));
        int256 position;
        // Check in half queue
        position = addressQueueStorage.getIndexOf(queueKeyHalf, _minipool);
        if (position != -1) {
            return position;
        }
        int256 offset = SafeCast.toInt256(addressQueueStorage.getLength(queueKeyHalf));
        // Check in full queue
        position = addressQueueStorage.getIndexOf(queueKeyFull, _minipool);
        if (position != -1) {
            return offset.add(position);
        }
        offset = offset.add(SafeCast.toInt256(addressQueueStorage.getLength(queueKeyFull)));
        // Check in variable queue
        position = addressQueueStorage.getIndexOf(queueKeyVariable, _minipool);
        if (position != -1) {
            return offset.add(position);
        }
        // Isn't in the queue
        return -1;
    }
}

/**
   *       .
   *      / \\
   *     |.'.|
   *     |'.'|
   *   ,'|   |'.
   *  |,-'-|-'-.|
   *   __|_| |         _        _      _____           _
   *  | ___ \\|        | |      | |    | ___ \\         | |
   *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
   *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
   *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
   *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
   * +---------------------------------------------------+
   * |    DECENTRALISED STAKING PROTOCOL FOR ETHEREUM    |
   * +---------------------------------------------------+
   *
   *  Rocket Pool is a first-of-its-kind Ethereum staking pool protocol, designed to
   *  be community-owned, decentralised, permissionless, & trustless.
   *
   *  For more information about Rocket Pool, visit https://rocketpool.net
   *
   *  Authored by the Rocket Pool Core Team
   *  Contributors: https://github.com/rocket-pool/rocketpool/graphs/contributors
   *  A special thanks to the Rocket Pool community for all their contributions.
   *
   */
pragma solidity >0.5.0 <0.9.0;
// SPDX-License-Identifier: GPL-3.0-only
interface RocketStorageInterface {
    // Deploy status
    function getDeployedStatus() external view returns (bool);
    // Guardian
    function getGuardian() external view returns(address);
    function setGuardian(address _newAddress) external;
    function confirmGuardian() external;
    // Getters
    function getAddress(bytes32 _key) external view returns (address);
    function getUint(bytes32 _key) external view returns (uint);
    function getString(bytes32 _key) external view returns (string memory);
    function getBytes(bytes32 _key) external view returns (bytes memory);
    function getBool(bytes32 _key) external view returns (bool);
    function getInt(bytes32 _key) external view returns (int);
    function getBytes32(bytes32 _key) external view returns (bytes32);
    // Setters
    function setAddress(bytes32 _key, address _value) external;
    function setUint(bytes32 _key, uint _value) external;
    function setString(bytes32 _key, string calldata _value) external;
    function setBytes(bytes32 _key, bytes calldata _value) external;
    function setBool(bytes32 _key, bool _value) external;
    function setInt(bytes32 _key, int _value) external;
    function setBytes32(bytes32 _key, bytes32 _value) external;
    // Deleters
    function deleteAddress(bytes32 _key) external;
    function deleteUint(bytes32 _key) external;
    function deleteString(bytes32 _key) external;
    function deleteBytes(bytes32 _key) external;
    function deleteBool(bytes32 _key) external;
    function deleteInt(bytes32 _key) external;
    function deleteBytes32(bytes32 _key) external;
    // Arithmetic
    function addUint(bytes32 _key, uint256 _amount) external;
    function subUint(bytes32 _key, uint256 _amount) external;
    // Protected storage
    function getNodeWithdrawalAddress(address _nodeAddress) external view returns (address);
    function getNodePendingWithdrawalAddress(address _nodeAddress) external view returns (address);
    function setWithdrawalAddress(address _nodeAddress, address _newWithdrawalAddress, bool _confirm) external;
    function confirmWithdrawalAddress(address _nodeAddress) external;
}
/**
   *       .
   *      / \\
   *     |.'.|
   *     |'.'|
   *   ,'|   |'.
   *  |,-'-|-'-.|
   *   __|_| |         _        _      _____           _
   *  | ___ \\|        | |      | |    | ___ \\         | |
   *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
   *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
   *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
   *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
   * +---------------------------------------------------+
   * |    DECENTRALISED STAKING PROTOCOL FOR ETHEREUM    |
   * +---------------------------------------------------+
   *
   *  Rocket Pool is a first-of-its-kind Ethereum staking pool protocol, designed to
   *  be community-owned, decentralised, permissionless, & trustless.
   *
   *  For more information about Rocket Pool, visit https://rocketpool.net
   *
   *  Authored by the Rocket Pool Core Team
   *  Contributors: https://github.com/rocket-pool/rocketpool/graphs/contributors
   *  A special thanks to the Rocket Pool community for all their contributions.
   *
   */
pragma solidity >0.5.0 <0.9.0;
// SPDX-License-Identifier: GPL-3.0-only
import "../interface/RocketStorageInterface.sol";
/// @title Base settings / modifiers for each contract in Rocket Pool
/// @author David Rugendyke
abstract contract RocketBase {
    // Calculate using this as the base
    uint256 constant calcBase = 1 ether;
    // Version of the contract
    uint8 public version;
    // The main storage contract where primary persistant storage is maintained
    RocketStorageInterface rocketStorage = RocketStorageInterface(address(0));
    /*** Modifiers **********************************************************/
    /**
    * @dev Throws if called by any sender that doesn't match a Rocket Pool network contract
    */
    modifier onlyLatestNetworkContract() {
        require(getBool(keccak256(abi.encodePacked("contract.exists", msg.sender))), "Invalid or outdated network contract");
        _;
    }
    /**
    * @dev Throws if called by any sender that doesn't match one of the supplied contract or is the latest version of that contract
    */
    modifier onlyLatestContract(string memory _contractName, address _contractAddress) {
        require(_contractAddress == getAddress(keccak256(abi.encodePacked("contract.address", _contractName))), "Invalid or outdated contract");
        _;
    }
    /**
    * @dev Throws if called by any sender that isn't a registered node
    */
    modifier onlyRegisteredNode(address _nodeAddress) {
        require(getBool(keccak256(abi.encodePacked("node.exists", _nodeAddress))), "Invalid node");
        _;
    }
    /**
    * @dev Throws if called by any sender that isn't a trusted node DAO member
    */
    modifier onlyTrustedNode(address _nodeAddress) {
        require(getBool(keccak256(abi.encodePacked("dao.trustednodes.", "member", _nodeAddress))), "Invalid trusted node");
        _;
    }
    /**
    * @dev Throws if called by any sender that isn't a registered minipool
    */
    modifier onlyRegisteredMinipool(address _minipoolAddress) {
        require(getBool(keccak256(abi.encodePacked("minipool.exists", _minipoolAddress))), "Invalid minipool");
        _;
    }
    
    /**
    * @dev Throws if called by any account other than a guardian account (temporary account allowed access to settings before DAO is fully enabled)
    */
    modifier onlyGuardian() {
        require(msg.sender == rocketStorage.getGuardian(), "Account is not a temporary guardian");
        _;
    }
    /*** Methods **********************************************************/
    /// @dev Set the main Rocket Storage address
    constructor(RocketStorageInterface _rocketStorageAddress) {
        // Update the contract address
        rocketStorage = RocketStorageInterface(_rocketStorageAddress);
    }
    /// @dev Get the address of a network contract by name
    function getContractAddress(string memory _contractName) internal view returns (address) {
        // Get the current contract address
        address contractAddress = getAddress(keccak256(abi.encodePacked("contract.address", _contractName)));
        // Check it
        require(contractAddress != address(0x0), "Contract not found");
        // Return
        return contractAddress;
    }
    /// @dev Get the address of a network contract by name (returns address(0x0) instead of reverting if contract does not exist)
    function getContractAddressUnsafe(string memory _contractName) internal view returns (address) {
        // Get the current contract address
        address contractAddress = getAddress(keccak256(abi.encodePacked("contract.address", _contractName)));
        // Return
        return contractAddress;
    }
    /// @dev Get the name of a network contract by address
    function getContractName(address _contractAddress) internal view returns (string memory) {
        // Get the contract name
        string memory contractName = getString(keccak256(abi.encodePacked("contract.name", _contractAddress)));
        // Check it
        require(bytes(contractName).length > 0, "Contract not found");
        // Return
        return contractName;
    }
    /// @dev Get revert error message from a .call method
    function getRevertMsg(bytes memory _returnData) internal pure returns (string memory) {
        // If the _res length is less than 68, then the transaction failed silently (without a revert message)
        if (_returnData.length < 68) return "Transaction reverted silently";
        assembly {
            // Slice the sighash.
            _returnData := add(_returnData, 0x04)
        }
        return abi.decode(_returnData, (string)); // All that remains is the revert string
    }
    /*** Rocket Storage Methods ****************************************/
    // Note: Unused helpers have been removed to keep contract sizes down
    /// @dev Storage get methods
    function getAddress(bytes32 _key) internal view returns (address) { return rocketStorage.getAddress(_key); }
    function getUint(bytes32 _key) internal view returns (uint) { return rocketStorage.getUint(_key); }
    function getString(bytes32 _key) internal view returns (string memory) { return rocketStorage.getString(_key); }
    function getBytes(bytes32 _key) internal view returns (bytes memory) { return rocketStorage.getBytes(_key); }
    function getBool(bytes32 _key) internal view returns (bool) { return rocketStorage.getBool(_key); }
    function getInt(bytes32 _key) internal view returns (int) { return rocketStorage.getInt(_key); }
    function getBytes32(bytes32 _key) internal view returns (bytes32) { return rocketStorage.getBytes32(_key); }
    /// @dev Storage set methods
    function setAddress(bytes32 _key, address _value) internal { rocketStorage.setAddress(_key, _value); }
    function setUint(bytes32 _key, uint _value) internal { rocketStorage.setUint(_key, _value); }
    function setString(bytes32 _key, string memory _value) internal { rocketStorage.setString(_key, _value); }
    function setBytes(bytes32 _key, bytes memory _value) internal { rocketStorage.setBytes(_key, _value); }
    function setBool(bytes32 _key, bool _value) internal { rocketStorage.setBool(_key, _value); }
    function setInt(bytes32 _key, int _value) internal { rocketStorage.setInt(_key, _value); }
    function setBytes32(bytes32 _key, bytes32 _value) internal { rocketStorage.setBytes32(_key, _value); }
    /// @dev Storage delete methods
    function deleteAddress(bytes32 _key) internal { rocketStorage.deleteAddress(_key); }
    function deleteUint(bytes32 _key) internal { rocketStorage.deleteUint(_key); }
    function deleteString(bytes32 _key) internal { rocketStorage.deleteString(_key); }
    function deleteBytes(bytes32 _key) internal { rocketStorage.deleteBytes(_key); }
    function deleteBool(bytes32 _key) internal { rocketStorage.deleteBool(_key); }
    function deleteInt(bytes32 _key) internal { rocketStorage.deleteInt(_key); }
    function deleteBytes32(bytes32 _key) internal { rocketStorage.deleteBytes32(_key); }
    /// @dev Storage arithmetic methods
    function addUint(bytes32 _key, uint256 _amount) internal { rocketStorage.addUint(_key, _amount); }
    function subUint(bytes32 _key, uint256 _amount) internal { rocketStorage.subUint(_key, _amount); }
}
/**
   *       .
   *      / \\
   *     |.'.|
   *     |'.'|
   *   ,'|   |'.
   *  |,-'-|-'-.|
   *   __|_| |         _        _      _____           _
   *  | ___ \\|        | |      | |    | ___ \\         | |
   *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
   *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
   *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
   *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
   * +---------------------------------------------------+
   * |    DECENTRALISED STAKING PROTOCOL FOR ETHEREUM    |
   * +---------------------------------------------------+
   *
   *  Rocket Pool is a first-of-its-kind Ethereum staking pool protocol, designed to
   *  be community-owned, decentralised, permissionless, & trustless.
   *
   *  For more information about Rocket Pool, visit https://rocketpool.net
   *
   *  Authored by the Rocket Pool Core Team
   *  Contributors: https://github.com/rocket-pool/rocketpool/graphs/contributors
   *  A special thanks to the Rocket Pool community for all their contributions.
   *
   */
pragma solidity >0.5.0 <0.9.0;
// SPDX-License-Identifier: GPL-3.0-only
interface RocketDAOProtocolSettingsInterface {
    function getSettingUint(string memory _settingPath) external view returns (uint256);
    function setSettingUint(string memory _settingPath, uint256 _value) external;
    function getSettingBool(string memory _settingPath) external view returns (bool);
    function setSettingBool(string memory _settingPath, bool _value) external;
    function getSettingAddress(string memory _settingPath) external view returns (address);
    function setSettingAddress(string memory _settingPath, address _value) external;
}
/**
   *       .
   *      / \\
   *     |.'.|
   *     |'.'|
   *   ,'|   |'.
   *  |,-'-|-'-.|
   *   __|_| |         _        _      _____           _
   *  | ___ \\|        | |      | |    | ___ \\         | |
   *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
   *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
   *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
   *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
   * +---------------------------------------------------+
   * |    DECENTRALISED STAKING PROTOCOL FOR ETHEREUM    |
   * +---------------------------------------------------+
   *
   *  Rocket Pool is a first-of-its-kind Ethereum staking pool protocol, designed to
   *  be community-owned, decentralised, permissionless, & trustless.
   *
   *  For more information about Rocket Pool, visit https://rocketpool.net
   *
   *  Authored by the Rocket Pool Core Team
   *  Contributors: https://github.com/rocket-pool/rocketpool/graphs/contributors
   *  A special thanks to the Rocket Pool community for all their contributions.
   *
   */
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >0.5.0 <0.9.0;
import "../../../RocketBase.sol";
import "../../../../interface/dao/protocol/settings/RocketDAOProtocolSettingsInterface.sol";
// Settings in RP which the DAO will have full control over
// This settings contract enables storage using setting paths with namespaces, rather than explicit set methods
abstract contract RocketDAOProtocolSettings is RocketBase, RocketDAOProtocolSettingsInterface {
    // The namespace for a particular group of settings
    bytes32 settingNameSpace;
    // Only allow updating from the DAO proposals contract
    modifier onlyDAOProtocolProposal() {
        // If this contract has been initialised, only allow access from the proposals contract
        if(getBool(keccak256(abi.encodePacked(settingNameSpace, "deployed")))) require(getContractAddress("rocketDAOProtocolProposals") == msg.sender, "Only DAO Protocol Proposals contract can update a setting");
        _;
    }
    // Construct
    constructor(RocketStorageInterface _rocketStorageAddress, string memory _settingNameSpace) RocketBase(_rocketStorageAddress) {
        // Apply the setting namespace
        settingNameSpace = keccak256(abi.encodePacked("dao.protocol.setting.", _settingNameSpace));
    }
    /*** Uints  ****************/
    // A general method to return any setting given the setting path is correct, only accepts uints
    function getSettingUint(string memory _settingPath) public view override returns (uint256) {
        return getUint(keccak256(abi.encodePacked(settingNameSpace, _settingPath)));
    } 
    // Update a Uint setting, can only be executed by the DAO contract when a majority on a setting proposal has passed and been executed
    function setSettingUint(string memory _settingPath, uint256 _value) virtual public override onlyDAOProtocolProposal {
        // Update setting now
        setUint(keccak256(abi.encodePacked(settingNameSpace, _settingPath)), _value);
    } 
   
    /*** Bools  ****************/
    // A general method to return any setting given the setting path is correct, only accepts bools
    function getSettingBool(string memory _settingPath) public view override returns (bool) {
        return getBool(keccak256(abi.encodePacked(settingNameSpace, _settingPath)));
    } 
    // Update a setting, can only be executed by the DAO contract when a majority on a setting proposal has passed and been executed
    function setSettingBool(string memory _settingPath, bool _value) virtual public override onlyDAOProtocolProposal {
        // Update setting now
        setBool(keccak256(abi.encodePacked(settingNameSpace, _settingPath)), _value);
    }
    
    /*** Addresses  ****************/
    // A general method to return any setting given the setting path is correct, only accepts addresses
    function getSettingAddress(string memory _settingPath) external view override returns (address) {
        return getAddress(keccak256(abi.encodePacked(settingNameSpace, _settingPath)));
    } 
    // Update a setting, can only be executed by the DAO contract when a majority on a setting proposal has passed and been executed
    function setSettingAddress(string memory _settingPath, address _value) virtual external override onlyDAOProtocolProposal {
        // Update setting now
        setAddress(keccak256(abi.encodePacked(settingNameSpace, _settingPath)), _value);
    }
}
/**
   *       .
   *      / \\
   *     |.'.|
   *     |'.'|
   *   ,'|   |'.
   *  |,-'-|-'-.|
   *   __|_| |         _        _      _____           _
   *  | ___ \\|        | |      | |    | ___ \\         | |
   *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
   *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
   *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
   *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
   * +---------------------------------------------------+
   * |    DECENTRALISED STAKING PROTOCOL FOR ETHEREUM    |
   * +---------------------------------------------------+
   *
   *  Rocket Pool is a first-of-its-kind Ethereum staking pool protocol, designed to
   *  be community-owned, decentralised, permissionless, & trustless.
   *
   *  For more information about Rocket Pool, visit https://rocketpool.net
   *
   *  Authored by the Rocket Pool Core Team
   *  Contributors: https://github.com/rocket-pool/rocketpool/graphs/contributors
   *  A special thanks to the Rocket Pool community for all their contributions.
   *
   */
pragma solidity >0.5.0 <0.9.0;
// SPDX-License-Identifier: GPL-3.0-only
// Represents the type of deposits required by a minipool
enum MinipoolDeposit {
    None,       // Marks an invalid deposit type
    Full,       // The minipool requires 32 ETH from the node operator, 16 ETH of which will be refinanced from user deposits
    Half,       // The minipool required 16 ETH from the node operator to be matched with 16 ETH from user deposits
    Empty,      // The minipool requires 0 ETH from the node operator to be matched with 32 ETH from user deposits (trusted nodes only)
    Variable    // Indicates this minipool is of the new generation that supports a variable deposit amount
}
/**
   *       .
   *      / \\
   *     |.'.|
   *     |'.'|
   *   ,'|   |'.
   *  |,-'-|-'-.|
   *   __|_| |         _        _      _____           _
   *  | ___ \\|        | |      | |    | ___ \\         | |
   *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
   *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
   *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
   *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
   * +---------------------------------------------------+
   * |    DECENTRALISED STAKING PROTOCOL FOR ETHEREUM    |
   * +---------------------------------------------------+
   *
   *  Rocket Pool is a first-of-its-kind Ethereum staking pool protocol, designed to
   *  be community-owned, decentralised, permissionless, & trustless.
   *
   *  For more information about Rocket Pool, visit https://rocketpool.net
   *
   *  Authored by the Rocket Pool Core Team
   *  Contributors: https://github.com/rocket-pool/rocketpool/graphs/contributors
   *  A special thanks to the Rocket Pool community for all their contributions.
   *
   */
pragma solidity >0.5.0 <0.9.0;
// SPDX-License-Identifier: GPL-3.0-only
import "../../../../types/MinipoolDeposit.sol";
interface RocketDAOProtocolSettingsMinipoolInterface {
    function getLaunchBalance() external view returns (uint256);
    function getPreLaunchValue() external pure returns (uint256);
    function getDepositUserAmount(MinipoolDeposit _depositType) external view returns (uint256);
    function getFullDepositUserAmount() external view returns (uint256);
    function getHalfDepositUserAmount() external view returns (uint256);
    function getVariableDepositAmount() external view returns (uint256);
    function getSubmitWithdrawableEnabled() external view returns (bool);
    function getBondReductionEnabled() external view returns (bool);
    function getLaunchTimeout() external view returns (uint256);
    function getMaximumCount() external view returns (uint256);
    function isWithinUserDistributeWindow(uint256 _time) external view returns (bool);
    function hasUserDistributeWindowPassed(uint256 _time) external view returns (bool);
    function getUserDistributeWindowStart() external view returns (uint256);
    function getUserDistributeWindowLength() external view returns (uint256);
}
/**
   *       .
   *      / \\
   *     |.'.|
   *     |'.'|
   *   ,'|   |'.
   *  |,-'-|-'-.|
   *   __|_| |         _        _      _____           _
   *  | ___ \\|        | |      | |    | ___ \\         | |
   *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
   *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
   *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
   *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
   * +---------------------------------------------------+
   * |    DECENTRALISED STAKING PROTOCOL FOR ETHEREUM    |
   * +---------------------------------------------------+
   *
   *  Rocket Pool is a first-of-its-kind Ethereum staking pool protocol, designed to
   *  be community-owned, decentralised, permissionless, & trustless.
   *
   *  For more information about Rocket Pool, visit https://rocketpool.net
   *
   *  Authored by the Rocket Pool Core Team
   *  Contributors: https://github.com/rocket-pool/rocketpool/graphs/contributors
   *  A special thanks to the Rocket Pool community for all their contributions.
   *
   */
pragma solidity >0.5.0 <0.9.0;
// SPDX-License-Identifier: GPL-3.0-only
interface RocketDAONodeTrustedSettingsMinipoolInterface {
    function getScrubPeriod() external view returns(uint256);
    function getPromotionScrubPeriod() external view returns(uint256);
    function getScrubQuorum() external view returns(uint256);
    function getCancelBondReductionQuorum() external view returns(uint256);
    function getScrubPenaltyEnabled() external view returns(bool);
    function isWithinBondReductionWindow(uint256 _time) external view returns (bool);
    function getBondReductionWindowStart() external view returns (uint256);
    function getBondReductionWindowLength() external view returns (uint256);
}
/**
   *       .
   *      / \\
   *     |.'.|
   *     |'.'|
   *   ,'|   |'.
   *  |,-'-|-'-.|
   *   __|_| |         _        _      _____           _
   *  | ___ \\|        | |      | |    | ___ \\         | |
   *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
   *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
   *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
   *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
   * +---------------------------------------------------+
   * |    DECENTRALISED STAKING PROTOCOL FOR ETHEREUM    |
   * +---------------------------------------------------+
   *
   *  Rocket Pool is a first-of-its-kind Ethereum staking pool protocol, designed to
   *  be community-owned, decentralised, permissionless, & trustless.
   *
   *  For more information about Rocket Pool, visit https://rocketpool.net
   *
   *  Authored by the Rocket Pool Core Team
   *  Contributors: https://github.com/rocket-pool/rocketpool/graphs/contributors
   *  A special thanks to the Rocket Pool community for all their contributions.
   *
   */
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity 0.8.18;
import "./RocketDAOProtocolSettings.sol";
import "../../../../interface/dao/protocol/settings/RocketDAOProtocolSettingsMinipoolInterface.sol";
import "../../../../interface/dao/node/settings/RocketDAONodeTrustedSettingsMinipoolInterface.sol";
import "../../../../types/MinipoolDeposit.sol";
/// @notice Network minipool settings
contract RocketDAOProtocolSettingsMinipool is RocketDAOProtocolSettings, RocketDAOProtocolSettingsMinipoolInterface {
    uint256 constant internal minipoolUserDistributeWindowStart = 90 days;
    constructor(RocketStorageInterface _rocketStorageAddress) RocketDAOProtocolSettings(_rocketStorageAddress, "minipool") {
        version = 3;
        // Initialize settings on deployment
        if(!getBool(keccak256(abi.encodePacked(settingNameSpace, "deployed")))) {
            // Apply settings
            setSettingBool("minipool.submit.withdrawable.enabled", false);
            setSettingBool("minipool.bond.reduction.enabled", false);
            setSettingUint("minipool.launch.timeout", 72 hours);
            setSettingUint("minipool.maximum.count", 14);
            setSettingUint("minipool.user.distribute.window.length", 2 days);
            // Settings initialised
            setBool(keccak256(abi.encodePacked(settingNameSpace, "deployed")), true);
        }
    }
    /// @notice Update a setting, overrides inherited setting method with extra checks for this contract
    /// @param _settingPath The path of the setting within this contract's namespace
    /// @param _value The value to set it to
    function setSettingUint(string memory _settingPath, uint256 _value) override public onlyDAOProtocolProposal {
        // Some safety guards for certain settings
        if(getBool(keccak256(abi.encodePacked(settingNameSpace, "deployed")))) {
            bytes32 settingKey = keccak256(abi.encodePacked(_settingPath));
            if(settingKey == keccak256(abi.encodePacked("minipool.launch.timeout"))) {
                RocketDAONodeTrustedSettingsMinipoolInterface rocketDAONodeTrustedSettingsMinipool = RocketDAONodeTrustedSettingsMinipoolInterface(getContractAddress("rocketDAONodeTrustedSettingsMinipool"));
                require(_value >= (rocketDAONodeTrustedSettingsMinipool.getScrubPeriod() + 1 hours), "Launch timeout must be greater than scrub period");
                // >= 12 hours (RPIP-33)
                require(_value >= 12 hours, "Launch timeout must be greater than 12 hours");
            } 
        }
        // Update setting now
        setUint(keccak256(abi.encodePacked(settingNameSpace, _settingPath)), _value);
    }
    /// @notice Returns the balance required to launch minipool
    function getLaunchBalance() override public pure returns (uint256) {
        return 32 ether;
    }
    /// @notice Returns the value required to pre-launch a minipool
    function getPreLaunchValue() override public pure returns (uint256) {
        return 1 ether;
    }
    /// @notice Returns the deposit amount for a given deposit type (only used for legacy minipool types)
    function getDepositUserAmount(MinipoolDeposit _depositType) override external pure returns (uint256) {
        if (_depositType == MinipoolDeposit.Full) { return getFullDepositUserAmount(); }
        if (_depositType == MinipoolDeposit.Half) { return getHalfDepositUserAmount(); }
        return 0;
    }
    /// @notice Returns the user amount for a "Full" deposit minipool
    function getFullDepositUserAmount() override public pure returns (uint256) {
        return getLaunchBalance() / 2;
    }
    /// @notice Returns the user amount for a "Half" deposit minipool
    function getHalfDepositUserAmount() override public pure returns (uint256) {
        return getLaunchBalance() / 2;
    }
    /// @notice Returns the amount a "Variable" minipool requires to move to staking status
    function getVariableDepositAmount() override public pure returns (uint256) {
        return getLaunchBalance() - getPreLaunchValue();
    }
    /// @notice Submit minipool withdrawable events currently enabled (trusted nodes only)
    function getSubmitWithdrawableEnabled() override external view returns (bool) {
        return getSettingBool("minipool.submit.withdrawable.enabled");
    }
    /// @notice Returns true if bond reductions are currentl enabled
    function getBondReductionEnabled() override external view returns (bool) {
        return getSettingBool("minipool.bond.reduction.enabled");
    }
    /// @notice Returns the timeout period in seconds for prelaunch minipools to launch
    function getLaunchTimeout() override external view returns (uint256) {
        return getSettingUint("minipool.launch.timeout");
    }
    /// @notice Returns the maximum number of minipools allowed at one time
    function getMaximumCount() override external view returns (uint256) {
      return getSettingUint("minipool.maximum.count");
    }
    /// @notice Returns true if the given time is within the user distribute window
    function isWithinUserDistributeWindow(uint256 _time) override external view returns (bool) {
        uint256 start = getUserDistributeWindowStart();
        uint256 length = getUserDistributeWindowLength();
        return (_time >= start && _time < (start + length));
    }
    /// @notice Returns true if the given time has passed the distribute window
    function hasUserDistributeWindowPassed(uint256 _time) override external view returns (bool) {
        uint256 start = getUserDistributeWindowStart();
        uint256 length = getUserDistributeWindowLength();
        return _time >= start + length;
    }
    /// @notice Returns the start of the user distribute window
    function getUserDistributeWindowStart() override public pure returns (uint256) {
        return minipoolUserDistributeWindowStart;
    }
    /// @notice Returns the length of the user distribute window
    function getUserDistributeWindowLength() override public view returns (uint256) {
        return getSettingUint("minipool.user.distribute.window.length");
    }
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        uint256 c = a + b;
        if (c < a) return (false, 0);
        return (true, c);
    }
    /**
     * @dev Returns the substraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b > a) return (false, 0);
        return (true, a - b);
    }
    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) return (true, 0);
        uint256 c = a * b;
        if (c / a != b) return (false, 0);
        return (true, c);
    }
    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b == 0) return (false, 0);
        return (true, a / b);
    }
    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b == 0) return (false, 0);
        return (true, a % b);
    }
    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");
        return c;
    }
    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b <= a, "SafeMath: subtraction overflow");
        return a - b;
    }
    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) return 0;
        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");
        return c;
    }
    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b > 0, "SafeMath: division by zero");
        return a / b;
    }
    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b > 0, "SafeMath: modulo by zero");
        return a % b;
    }
    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        return a - b;
    }
    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryDiv}.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        return a / b;
    }
    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        return a % b;
    }
}
/**
  *       .
  *      / \\
  *     |.'.|
  *     |'.'|
  *   ,'|   |`.
  *  |,-'-|-'-.|
  *   __|_| |         _        _      _____           _
  *  | ___ \\|        | |      | |    | ___ \\         | |
  *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
  *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
  *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
  *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
  * +---------------------------------------------------+
  * |    DECENTRALISED STAKING PROTOCOL FOR ETHEREUM    |
  * +---------------------------------------------------+
  *
  *  Rocket Pool is a first-of-its-kind Ethereum staking pool protocol, designed to
  *  be community-owned, decentralised, and trustless.
  *
  *  For more information about Rocket Pool, visit https://rocketpool.net
  *
  *  Authors: David Rugendyke, Jake Pospischil, Kane Wallmann, Darren Langley, Joe Clapis, Nick Doherty
  *
  */
pragma solidity 0.7.6;
// SPDX-License-Identifier: GPL-3.0-only
import "../interface/RocketStorageInterface.sol";
/// @title Base settings / modifiers for each contract in Rocket Pool
/// @author David Rugendyke
abstract contract RocketBase {
    // Calculate using this as the base
    uint256 constant calcBase = 1 ether;
    // Version of the contract
    uint8 public version;
    // The main storage contract where primary persistant storage is maintained
    RocketStorageInterface rocketStorage = RocketStorageInterface(0);
    /*** Modifiers **********************************************************/
    /**
    * @dev Throws if called by any sender that doesn't match a Rocket Pool network contract
    */
    modifier onlyLatestNetworkContract() {
        require(getBool(keccak256(abi.encodePacked("contract.exists", msg.sender))), "Invalid or outdated network contract");
        _;
    }
    /**
    * @dev Throws if called by any sender that doesn't match one of the supplied contract or is the latest version of that contract
    */
    modifier onlyLatestContract(string memory _contractName, address _contractAddress) {
        require(_contractAddress == getAddress(keccak256(abi.encodePacked("contract.address", _contractName))), "Invalid or outdated contract");
        _;
    }
    /**
    * @dev Throws if called by any sender that isn't a registered node
    */
    modifier onlyRegisteredNode(address _nodeAddress) {
        require(getBool(keccak256(abi.encodePacked("node.exists", _nodeAddress))), "Invalid node");
        _;
    }
    /**
    * @dev Throws if called by any sender that isn't a trusted node DAO member
    */
    modifier onlyTrustedNode(address _nodeAddress) {
        require(getBool(keccak256(abi.encodePacked("dao.trustednodes.", "member", _nodeAddress))), "Invalid trusted node");
        _;
    }
    /**
    * @dev Throws if called by any sender that isn't a registered minipool
    */
    modifier onlyRegisteredMinipool(address _minipoolAddress) {
        require(getBool(keccak256(abi.encodePacked("minipool.exists", _minipoolAddress))), "Invalid minipool");
        _;
    }
    
    /**
    * @dev Throws if called by any account other than a guardian account (temporary account allowed access to settings before DAO is fully enabled)
    */
    modifier onlyGuardian() {
        require(msg.sender == rocketStorage.getGuardian(), "Account is not a temporary guardian");
        _;
    }
    /*** Methods **********************************************************/
    /// @dev Set the main Rocket Storage address
    constructor(RocketStorageInterface _rocketStorageAddress) {
        // Update the contract address
        rocketStorage = RocketStorageInterface(_rocketStorageAddress);
    }
    /// @dev Get the address of a network contract by name
    function getContractAddress(string memory _contractName) internal view returns (address) {
        // Get the current contract address
        address contractAddress = getAddress(keccak256(abi.encodePacked("contract.address", _contractName)));
        // Check it
        require(contractAddress != address(0x0), "Contract not found");
        // Return
        return contractAddress;
    }
    /// @dev Get the address of a network contract by name (returns address(0x0) instead of reverting if contract does not exist)
    function getContractAddressUnsafe(string memory _contractName) internal view returns (address) {
        // Get the current contract address
        address contractAddress = getAddress(keccak256(abi.encodePacked("contract.address", _contractName)));
        // Return
        return contractAddress;
    }
    /// @dev Get the name of a network contract by address
    function getContractName(address _contractAddress) internal view returns (string memory) {
        // Get the contract name
        string memory contractName = getString(keccak256(abi.encodePacked("contract.name", _contractAddress)));
        // Check it
        require(bytes(contractName).length > 0, "Contract not found");
        // Return
        return contractName;
    }
    /// @dev Get revert error message from a .call method
    function getRevertMsg(bytes memory _returnData) internal pure returns (string memory) {
        // If the _res length is less than 68, then the transaction failed silently (without a revert message)
        if (_returnData.length < 68) return "Transaction reverted silently";
        assembly {
            // Slice the sighash.
            _returnData := add(_returnData, 0x04)
        }
        return abi.decode(_returnData, (string)); // All that remains is the revert string
    }
    /*** Rocket Storage Methods ****************************************/
    // Note: Unused helpers have been removed to keep contract sizes down
    /// @dev Storage get methods
    function getAddress(bytes32 _key) internal view returns (address) { return rocketStorage.getAddress(_key); }
    function getUint(bytes32 _key) internal view returns (uint) { return rocketStorage.getUint(_key); }
    function getString(bytes32 _key) internal view returns (string memory) { return rocketStorage.getString(_key); }
    function getBytes(bytes32 _key) internal view returns (bytes memory) { return rocketStorage.getBytes(_key); }
    function getBool(bytes32 _key) internal view returns (bool) { return rocketStorage.getBool(_key); }
    function getInt(bytes32 _key) internal view returns (int) { return rocketStorage.getInt(_key); }
    function getBytes32(bytes32 _key) internal view returns (bytes32) { return rocketStorage.getBytes32(_key); }
    /// @dev Storage set methods
    function setAddress(bytes32 _key, address _value) internal { rocketStorage.setAddress(_key, _value); }
    function setUint(bytes32 _key, uint _value) internal { rocketStorage.setUint(_key, _value); }
    function setString(bytes32 _key, string memory _value) internal { rocketStorage.setString(_key, _value); }
    function setBytes(bytes32 _key, bytes memory _value) internal { rocketStorage.setBytes(_key, _value); }
    function setBool(bytes32 _key, bool _value) internal { rocketStorage.setBool(_key, _value); }
    function setInt(bytes32 _key, int _value) internal { rocketStorage.setInt(_key, _value); }
    function setBytes32(bytes32 _key, bytes32 _value) internal { rocketStorage.setBytes32(_key, _value); }
    /// @dev Storage delete methods
    function deleteAddress(bytes32 _key) internal { rocketStorage.deleteAddress(_key); }
    function deleteUint(bytes32 _key) internal { rocketStorage.deleteUint(_key); }
    function deleteString(bytes32 _key) internal { rocketStorage.deleteString(_key); }
    function deleteBytes(bytes32 _key) internal { rocketStorage.deleteBytes(_key); }
    function deleteBool(bytes32 _key) internal { rocketStorage.deleteBool(_key); }
    function deleteInt(bytes32 _key) internal { rocketStorage.deleteInt(_key); }
    function deleteBytes32(bytes32 _key) internal { rocketStorage.deleteBytes32(_key); }
    /// @dev Storage arithmetic methods
    function addUint(bytes32 _key, uint256 _amount) internal { rocketStorage.addUint(_key, _amount); }
    function subUint(bytes32 _key, uint256 _amount) internal { rocketStorage.subUint(_key, _amount); }
}
/**
  *       .
  *      / \\
  *     |.'.|
  *     |'.'|
  *   ,'|   |`.
  *  |,-'-|-'-.|
  *   __|_| |         _        _      _____           _
  *  | ___ \\|        | |      | |    | ___ \\         | |
  *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
  *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
  *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
  *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
  * +---------------------------------------------------+
  * |    DECENTRALISED STAKING PROTOCOL FOR ETHEREUM    |
  * +---------------------------------------------------+
  *
  *  Rocket Pool is a first-of-its-kind Ethereum staking pool protocol, designed to
  *  be community-owned, decentralised, and trustless.
  *
  *  For more information about Rocket Pool, visit https://rocketpool.net
  *
  *  Authors: David Rugendyke, Jake Pospischil, Kane Wallmann, Darren Langley, Joe Clapis, Nick Doherty
  *
  */
pragma solidity 0.7.6;
// SPDX-License-Identifier: GPL-3.0-only
import "@openzeppelin/contracts/math/SafeMath.sol";
import "../RocketBase.sol";
import "../../interface/util/AddressQueueStorageInterface.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
// Address queue storage helper for RocketStorage data (ring buffer implementation)
contract AddressQueueStorage is RocketBase, AddressQueueStorageInterface {
    // Libs
    using SafeMath for uint256;
    // Settings
    uint256 constant public capacity = 2 ** 255; // max uint256 / 2
    // Construct
    constructor(RocketStorageInterface _rocketStorageAddress) RocketBase(_rocketStorageAddress) {
        version = 1;
    }
    // The number of items in a queue
    function getLength(bytes32 _key) override public view returns (uint) {
        uint start = getUint(keccak256(abi.encodePacked(_key, ".start")));
        uint end = getUint(keccak256(abi.encodePacked(_key, ".end")));
        if (end < start) { end = end.add(capacity); }
        return end.sub(start);
    }
    // The item in a queue by index
    function getItem(bytes32 _key, uint _index) override external view returns (address) {
        uint index = getUint(keccak256(abi.encodePacked(_key, ".start"))).add(_index);
        if (index >= capacity) { index = index.sub(capacity); }
        return getAddress(keccak256(abi.encodePacked(_key, ".item", index)));
    }
    // The index of an item in a queue
    // Returns -1 if the value is not found
    function getIndexOf(bytes32 _key, address _value) override external view returns (int) {
        int index = int(getUint(keccak256(abi.encodePacked(_key, ".index", _value)))) - 1;
        if (index != -1) {
            index -= int(getUint(keccak256(abi.encodePacked(_key, ".start"))));
            if (index < 0) { index += int(capacity); }
        }
        return index;
    }
    // Add an item to the end of a queue
    // Requires that the queue is not at capacity
    // Requires that the item does not exist in the queue
    function enqueueItem(bytes32 _key, address _value) override external onlyLatestContract("addressQueueStorage", address(this)) onlyLatestNetworkContract {
        require(getLength(_key) < capacity.sub(1), "Queue is at capacity");
        require(getUint(keccak256(abi.encodePacked(_key, ".index", _value))) == 0, "Item already exists in queue");
        uint index = getUint(keccak256(abi.encodePacked(_key, ".end")));
        setAddress(keccak256(abi.encodePacked(_key, ".item", index)), _value);
        setUint(keccak256(abi.encodePacked(_key, ".index", _value)), index.add(1));
        index = index.add(1);
        if (index >= capacity) { index = index.sub(capacity); }
        setUint(keccak256(abi.encodePacked(_key, ".end")), index);
    }
    // Remove an item from the start of a queue and return it
    // Requires that the queue is not empty
    function dequeueItem(bytes32 _key) override external onlyLatestContract("addressQueueStorage", address(this)) onlyLatestNetworkContract returns (address) {
        require(getLength(_key) > 0, "Queue is empty");
        uint start = getUint(keccak256(abi.encodePacked(_key, ".start")));
        address item = getAddress(keccak256(abi.encodePacked(_key, ".item", start)));
        start = start.add(1);
        if (start >= capacity) { start = start.sub(capacity); }
        setUint(keccak256(abi.encodePacked(_key, ".index", item)), 0);
        setUint(keccak256(abi.encodePacked(_key, ".start")), start);
        return item;
    }
    // Remove an item from a queue
    // Swaps the item with the last item in the queue and truncates it; computationally cheap
    // Requires that the item exists in the queue
    function removeItem(bytes32 _key, address _value) override external onlyLatestContract("addressQueueStorage", address(this)) onlyLatestNetworkContract {
        uint index = getUint(keccak256(abi.encodePacked(_key, ".index", _value)));
        require(index-- > 0, "Item does not exist in queue");
        uint lastIndex = getUint(keccak256(abi.encodePacked(_key, ".end")));
        if (lastIndex == 0) lastIndex = capacity;
        lastIndex = lastIndex.sub(1);
        if (index != lastIndex) {
            address lastItem = getAddress(keccak256(abi.encodePacked(_key, ".item", lastIndex)));
            setAddress(keccak256(abi.encodePacked(_key, ".item", index)), lastItem);
            setUint(keccak256(abi.encodePacked(_key, ".index", lastItem)), index.add(1));
        }
        setUint(keccak256(abi.encodePacked(_key, ".index", _value)), 0);
        setUint(keccak256(abi.encodePacked(_key, ".end")), lastIndex);
    }
}
/**
  *       .
  *      / \\
  *     |.'.|
  *     |'.'|
  *   ,'|   |`.
  *  |,-'-|-'-.|
  *   __|_| |         _        _      _____           _
  *  | ___ \\|        | |      | |    | ___ \\         | |
  *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
  *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
  *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
  *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
  * +---------------------------------------------------+
  * |    DECENTRALISED STAKING PROTOCOL FOR ETHEREUM    |
  * +---------------------------------------------------+
  *
  *  Rocket Pool is a first-of-its-kind Ethereum staking pool protocol, designed to
  *  be community-owned, decentralised, and trustless.
  *
  *  For more information about Rocket Pool, visit https://rocketpool.net
  *
  *  Authors: David Rugendyke, Jake Pospischil, Kane Wallmann, Darren Langley, Joe Clapis, Nick Doherty
  *
  */
pragma solidity 0.7.6;
// SPDX-License-Identifier: GPL-3.0-only
interface RocketStorageInterface {
    // Deploy status
    function getDeployedStatus() external view returns (bool);
    // Guardian
    function getGuardian() external view returns(address);
    function setGuardian(address _newAddress) external;
    function confirmGuardian() external;
    // Getters
    function getAddress(bytes32 _key) external view returns (address);
    function getUint(bytes32 _key) external view returns (uint);
    function getString(bytes32 _key) external view returns (string memory);
    function getBytes(bytes32 _key) external view returns (bytes memory);
    function getBool(bytes32 _key) external view returns (bool);
    function getInt(bytes32 _key) external view returns (int);
    function getBytes32(bytes32 _key) external view returns (bytes32);
    // Setters
    function setAddress(bytes32 _key, address _value) external;
    function setUint(bytes32 _key, uint _value) external;
    function setString(bytes32 _key, string calldata _value) external;
    function setBytes(bytes32 _key, bytes calldata _value) external;
    function setBool(bytes32 _key, bool _value) external;
    function setInt(bytes32 _key, int _value) external;
    function setBytes32(bytes32 _key, bytes32 _value) external;
    // Deleters
    function deleteAddress(bytes32 _key) external;
    function deleteUint(bytes32 _key) external;
    function deleteString(bytes32 _key) external;
    function deleteBytes(bytes32 _key) external;
    function deleteBool(bytes32 _key) external;
    function deleteInt(bytes32 _key) external;
    function deleteBytes32(bytes32 _key) external;
    // Arithmetic
    function addUint(bytes32 _key, uint256 _amount) external;
    function subUint(bytes32 _key, uint256 _amount) external;
    // Protected storage
    function getNodeWithdrawalAddress(address _nodeAddress) external view returns (address);
    function getNodePendingWithdrawalAddress(address _nodeAddress) external view returns (address);
    function setWithdrawalAddress(address _nodeAddress, address _newWithdrawalAddress, bool _confirm) external;
    function confirmWithdrawalAddress(address _nodeAddress) external;
}
/**
  *       .
  *      / \\
  *     |.'.|
  *     |'.'|
  *   ,'|   |`.
  *  |,-'-|-'-.|
  *   __|_| |         _        _      _____           _
  *  | ___ \\|        | |      | |    | ___ \\         | |
  *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
  *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
  *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
  *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
  * +---------------------------------------------------+
  * |    DECENTRALISED STAKING PROTOCOL FOR ETHEREUM    |
  * +---------------------------------------------------+
  *
  *  Rocket Pool is a first-of-its-kind Ethereum staking pool protocol, designed to
  *  be community-owned, decentralised, and trustless.
  *
  *  For more information about Rocket Pool, visit https://rocketpool.net
  *
  *  Authors: David Rugendyke, Jake Pospischil, Kane Wallmann, Darren Langley, Joe Clapis, Nick Doherty
  *
  */
pragma solidity 0.7.6;
// SPDX-License-Identifier: GPL-3.0-only
interface AddressQueueStorageInterface {
    function getLength(bytes32 _key) external view returns (uint);
    function getItem(bytes32 _key, uint _index) external view returns (address);
    function getIndexOf(bytes32 _key, address _value) external view returns (int);
    function enqueueItem(bytes32 _key, address _value) external;
    function dequeueItem(bytes32 _key) external returns (address);
    function removeItem(bytes32 _key, address _value) external;
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        uint256 c = a + b;
        if (c < a) return (false, 0);
        return (true, c);
    }
    /**
     * @dev Returns the substraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b > a) return (false, 0);
        return (true, a - b);
    }
    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) return (true, 0);
        uint256 c = a * b;
        if (c / a != b) return (false, 0);
        return (true, c);
    }
    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b == 0) return (false, 0);
        return (true, a / b);
    }
    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b == 0) return (false, 0);
        return (true, a % b);
    }
    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");
        return c;
    }
    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b <= a, "SafeMath: subtraction overflow");
        return a - b;
    }
    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) return 0;
        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");
        return c;
    }
    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b > 0, "SafeMath: division by zero");
        return a / b;
    }
    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b > 0, "SafeMath: modulo by zero");
        return a % b;
    }
    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        return a - b;
    }
    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryDiv}.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        return a / b;
    }
    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        return a % b;
    }
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../../utils/Context.sol";
import "./IERC20.sol";
import "../../math/SafeMath.sol";
/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20PresetMinterPauser}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * We have followed general OpenZeppelin guidelines: functions revert instead
 * of returning `false` on failure. This behavior is nonetheless conventional
 * and does not conflict with the expectations of ERC20 applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
contract ERC20 is Context, IERC20 {
    using SafeMath for uint256;
    mapping (address => uint256) private _balances;
    mapping (address => mapping (address => uint256)) private _allowances;
    uint256 private _totalSupply;
    string private _name;
    string private _symbol;
    uint8 private _decimals;
    /**
     * @dev Sets the values for {name} and {symbol}, initializes {decimals} with
     * a default value of 18.
     *
     * To select a different value for {decimals}, use {_setupDecimals}.
     *
     * All three of these values are immutable: they can only be set once during
     * construction.
     */
    constructor (string memory name_, string memory symbol_) public {
        _name = name_;
        _symbol = symbol_;
        _decimals = 18;
    }
    /**
     * @dev Returns the name of the token.
     */
    function name() public view virtual returns (string memory) {
        return _name;
    }
    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual returns (string memory) {
        return _symbol;
    }
    /**
     * @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() public view virtual returns (uint8) {
        return _decimals;
    }
    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }
    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view virtual override returns (uint256) {
        return _balances[account];
    }
    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `recipient` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }
    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }
    /**
     * @dev See {IERC20-approve}.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }
    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * Requirements:
     *
     * - `sender` and `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     * - the caller must have allowance for ``sender``'s tokens of at least
     * `amount`.
     */
    function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
        return true;
    }
    /**
     * @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}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
        return true;
    }
    /**
     * @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}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
        return true;
    }
    /**
     * @dev Moves tokens `amount` from `sender` to `recipient`.
     *
     * This is internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `sender` cannot be the zero address.
     * - `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     */
    function _transfer(address sender, address recipient, uint256 amount) internal virtual {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");
        _beforeTokenTransfer(sender, recipient, amount);
        _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
        _balances[recipient] = _balances[recipient].add(amount);
        emit Transfer(sender, recipient, amount);
    }
    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");
        _beforeTokenTransfer(address(0), account, amount);
        _totalSupply = _totalSupply.add(amount);
        _balances[account] = _balances[account].add(amount);
        emit Transfer(address(0), account, amount);
    }
    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");
        _beforeTokenTransfer(account, address(0), amount);
        _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
        _totalSupply = _totalSupply.sub(amount);
        emit Transfer(account, address(0), amount);
    }
    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(address owner, address spender, uint256 amount) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");
        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }
    /**
     * @dev Sets {decimals} to a value other than the default one of 18.
     *
     * WARNING: This function should only be called from the constructor. Most
     * applications that interact with token contracts will not expect
     * {decimals} to ever change, and may work incorrectly if it does.
     */
    function _setupDecimals(uint8 decimals_) internal virtual {
        _decimals = decimals_;
    }
    /**
     * @dev Hook that is called before any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * will be to transferred to `to`.
     * - when `from` is zero, `amount` tokens will be minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../../utils/Context.sol";
import "./ERC20.sol";
/**
 * @dev Extension of {ERC20} that allows token holders to destroy both their own
 * tokens and those that they have an allowance for, in a way that can be
 * recognized off-chain (via event analysis).
 */
abstract contract ERC20Burnable is Context, ERC20 {
    using SafeMath for uint256;
    /**
     * @dev Destroys `amount` tokens from the caller.
     *
     * See {ERC20-_burn}.
     */
    function burn(uint256 amount) public virtual {
        _burn(_msgSender(), amount);
    }
    /**
     * @dev Destroys `amount` tokens from `account`, deducting from the caller's
     * allowance.
     *
     * See {ERC20-_burn} and {ERC20-allowance}.
     *
     * Requirements:
     *
     * - the caller must have allowance for ``accounts``'s tokens of at least
     * `amount`.
     */
    function burnFrom(address account, uint256 amount) public virtual {
        uint256 decreasedAllowance = allowance(account, _msgSender()).sub(amount, "ERC20: burn amount exceeds allowance");
        _approve(account, _msgSender(), decreasedAllowance);
        _burn(account, amount);
    }
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
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);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "./IERC20.sol";
import "../../math/SafeMath.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 SafeMath for uint256;
    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'
        // solhint-disable-next-line max-line-length
        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).add(value);
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }
    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }
    /**
     * @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
            // solhint-disable-next-line max-line-length
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.2 <0.8.0;
/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.
        uint256 size;
        // solhint-disable-next-line no-inline-assembly
        assembly { size := extcodesize(account) }
        return size > 0;
    }
    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");
        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (bool success, ) = recipient.call{ value: amount }("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }
    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain`call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
      return functionCall(target, data, "Address: low-level call failed");
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }
    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");
        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.call{ value: value }(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");
        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.staticcall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");
        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }
    function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly
                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <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 GSN 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 payable) {
        return msg.sender;
    }
    function _msgData() internal view virtual returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}
/**
  *       .
  *      / \\
  *     |.'.|
  *     |'.'|
  *   ,'|   |`.
  *  |,-'-|-'-.|
  *   __|_| |         _        _      _____           _
  *  | ___ \\|        | |      | |    | ___ \\         | |
  *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
  *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
  *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
  *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
  * +---------------------------------------------------+
  * |    DECENTRALISED STAKING PROTOCOL FOR ETHEREUM    |
  * +---------------------------------------------------+
  *
  *  Rocket Pool is a first-of-its-kind Ethereum staking pool protocol, designed to
  *  be community-owned, decentralised, and trustless.
  *
  *  For more information about Rocket Pool, visit https://rocketpool.net
  *
  *  Authors: David Rugendyke, Jake Pospischil, Kane Wallmann, Darren Langley, Joe Clapis, Nick Doherty
  *
  */
pragma solidity 0.7.6;
// SPDX-License-Identifier: GPL-3.0-only
import "../interface/RocketStorageInterface.sol";
/// @title Base settings / modifiers for each contract in Rocket Pool
/// @author David Rugendyke
abstract contract RocketBase {
    // Calculate using this as the base
    uint256 constant calcBase = 1 ether;
    // Version of the contract
    uint8 public version;
    // The main storage contract where primary persistant storage is maintained
    RocketStorageInterface rocketStorage = RocketStorageInterface(0);
    /*** Modifiers **********************************************************/
    /**
    * @dev Throws if called by any sender that doesn't match a Rocket Pool network contract
    */
    modifier onlyLatestNetworkContract() {
        require(getBool(keccak256(abi.encodePacked("contract.exists", msg.sender))), "Invalid or outdated network contract");
        _;
    }
    /**
    * @dev Throws if called by any sender that doesn't match one of the supplied contract or is the latest version of that contract
    */
    modifier onlyLatestContract(string memory _contractName, address _contractAddress) {
        require(_contractAddress == getAddress(keccak256(abi.encodePacked("contract.address", _contractName))), "Invalid or outdated contract");
        _;
    }
    /**
    * @dev Throws if called by any sender that isn't a registered node
    */
    modifier onlyRegisteredNode(address _nodeAddress) {
        require(getBool(keccak256(abi.encodePacked("node.exists", _nodeAddress))), "Invalid node");
        _;
    }
    /**
    * @dev Throws if called by any sender that isn't a trusted node DAO member
    */
    modifier onlyTrustedNode(address _nodeAddress) {
        require(getBool(keccak256(abi.encodePacked("dao.trustednodes.", "member", _nodeAddress))), "Invalid trusted node");
        _;
    }
    /**
    * @dev Throws if called by any sender that isn't a registered minipool
    */
    modifier onlyRegisteredMinipool(address _minipoolAddress) {
        require(getBool(keccak256(abi.encodePacked("minipool.exists", _minipoolAddress))), "Invalid minipool");
        _;
    }
    
    /**
    * @dev Throws if called by any account other than a guardian account (temporary account allowed access to settings before DAO is fully enabled)
    */
    modifier onlyGuardian() {
        require(msg.sender == rocketStorage.getGuardian(), "Account is not a temporary guardian");
        _;
    }
    /*** Methods **********************************************************/
    /// @dev Set the main Rocket Storage address
    constructor(RocketStorageInterface _rocketStorageAddress) {
        // Update the contract address
        rocketStorage = RocketStorageInterface(_rocketStorageAddress);
    }
    /// @dev Get the address of a network contract by name
    function getContractAddress(string memory _contractName) internal view returns (address) {
        // Get the current contract address
        address contractAddress = getAddress(keccak256(abi.encodePacked("contract.address", _contractName)));
        // Check it
        require(contractAddress != address(0x0), "Contract not found");
        // Return
        return contractAddress;
    }
    /// @dev Get the address of a network contract by name (returns address(0x0) instead of reverting if contract does not exist)
    function getContractAddressUnsafe(string memory _contractName) internal view returns (address) {
        // Get the current contract address
        address contractAddress = getAddress(keccak256(abi.encodePacked("contract.address", _contractName)));
        // Return
        return contractAddress;
    }
    /// @dev Get the name of a network contract by address
    function getContractName(address _contractAddress) internal view returns (string memory) {
        // Get the contract name
        string memory contractName = getString(keccak256(abi.encodePacked("contract.name", _contractAddress)));
        // Check it
        require(bytes(contractName).length > 0, "Contract not found");
        // Return
        return contractName;
    }
    /// @dev Get revert error message from a .call method
    function getRevertMsg(bytes memory _returnData) internal pure returns (string memory) {
        // If the _res length is less than 68, then the transaction failed silently (without a revert message)
        if (_returnData.length < 68) return "Transaction reverted silently";
        assembly {
            // Slice the sighash.
            _returnData := add(_returnData, 0x04)
        }
        return abi.decode(_returnData, (string)); // All that remains is the revert string
    }
    /*** Rocket Storage Methods ****************************************/
    // Note: Unused helpers have been removed to keep contract sizes down
    /// @dev Storage get methods
    function getAddress(bytes32 _key) internal view returns (address) { return rocketStorage.getAddress(_key); }
    function getUint(bytes32 _key) internal view returns (uint) { return rocketStorage.getUint(_key); }
    function getString(bytes32 _key) internal view returns (string memory) { return rocketStorage.getString(_key); }
    function getBytes(bytes32 _key) internal view returns (bytes memory) { return rocketStorage.getBytes(_key); }
    function getBool(bytes32 _key) internal view returns (bool) { return rocketStorage.getBool(_key); }
    function getInt(bytes32 _key) internal view returns (int) { return rocketStorage.getInt(_key); }
    function getBytes32(bytes32 _key) internal view returns (bytes32) { return rocketStorage.getBytes32(_key); }
    /// @dev Storage set methods
    function setAddress(bytes32 _key, address _value) internal { rocketStorage.setAddress(_key, _value); }
    function setUint(bytes32 _key, uint _value) internal { rocketStorage.setUint(_key, _value); }
    function setString(bytes32 _key, string memory _value) internal { rocketStorage.setString(_key, _value); }
    function setBytes(bytes32 _key, bytes memory _value) internal { rocketStorage.setBytes(_key, _value); }
    function setBool(bytes32 _key, bool _value) internal { rocketStorage.setBool(_key, _value); }
    function setInt(bytes32 _key, int _value) internal { rocketStorage.setInt(_key, _value); }
    function setBytes32(bytes32 _key, bytes32 _value) internal { rocketStorage.setBytes32(_key, _value); }
    /// @dev Storage delete methods
    function deleteAddress(bytes32 _key) internal { rocketStorage.deleteAddress(_key); }
    function deleteUint(bytes32 _key) internal { rocketStorage.deleteUint(_key); }
    function deleteString(bytes32 _key) internal { rocketStorage.deleteString(_key); }
    function deleteBytes(bytes32 _key) internal { rocketStorage.deleteBytes(_key); }
    function deleteBool(bytes32 _key) internal { rocketStorage.deleteBool(_key); }
    function deleteInt(bytes32 _key) internal { rocketStorage.deleteInt(_key); }
    function deleteBytes32(bytes32 _key) internal { rocketStorage.deleteBytes32(_key); }
    /// @dev Storage arithmetic methods
    function addUint(bytes32 _key, uint256 _amount) internal { rocketStorage.addUint(_key, _amount); }
    function subUint(bytes32 _key, uint256 _amount) internal { rocketStorage.subUint(_key, _amount); }
}
/**
  *       .
  *      / \\
  *     |.'.|
  *     |'.'|
  *   ,'|   |`.
  *  |,-'-|-'-.|
  *   __|_| |         _        _      _____           _
  *  | ___ \\|        | |      | |    | ___ \\         | |
  *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
  *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
  *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
  *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
  * +---------------------------------------------------+
  * |    DECENTRALISED STAKING PROTOCOL FOR ETHEREUM    |
  * +---------------------------------------------------+
  *
  *  Rocket Pool is a first-of-its-kind Ethereum staking pool protocol, designed to
  *  be community-owned, decentralised, and trustless.
  *
  *  For more information about Rocket Pool, visit https://rocketpool.net
  *
  *  Authors: David Rugendyke, Jake Pospischil, Kane Wallmann, Darren Langley, Joe Clapis, Nick Doherty
  *
  */
pragma solidity 0.7.6;
// SPDX-License-Identifier: GPL-3.0-only
import "./RocketBase.sol";
import "../interface/RocketVaultInterface.sol";
import "../interface/RocketVaultWithdrawerInterface.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20Burnable.sol";
// ETH and rETH are stored here to prevent contract upgrades from affecting balances
// The RocketVault contract must not be upgraded
contract RocketVault is RocketBase, RocketVaultInterface {
    // Libs
    using SafeMath for uint;
    using SafeERC20 for IERC20;
    // Network contract balances
    mapping(string => uint256) etherBalances;
    mapping(bytes32 => uint256) tokenBalances;
    // Events
    event EtherDeposited(string indexed by, uint256 amount, uint256 time);
    event EtherWithdrawn(string indexed by, uint256 amount, uint256 time);
    event TokenDeposited(bytes32 indexed by, address indexed tokenAddress, uint256 amount, uint256 time);
    event TokenWithdrawn(bytes32 indexed by, address indexed tokenAddress, uint256 amount, uint256 time);
    event TokenBurned(bytes32 indexed by, address indexed tokenAddress, uint256 amount, uint256 time);
    event TokenTransfer(bytes32 indexed by, bytes32 indexed to, address indexed tokenAddress, uint256 amount, uint256 time);
\t// Construct
    constructor(RocketStorageInterface _rocketStorageAddress) RocketBase(_rocketStorageAddress) {
        version = 1;
    }
    // Get a contract's ETH balance by address
    function balanceOf(string memory _networkContractName) override external view returns (uint256) {
        // Return balance
        return etherBalances[_networkContractName];
    }
    // Get the balance of a token held by a network contract
    function balanceOfToken(string memory _networkContractName, IERC20 _tokenAddress) override external view returns (uint256) {
        // Return balance
        return tokenBalances[keccak256(abi.encodePacked(_networkContractName, _tokenAddress))];
    }
    // Accept an ETH deposit from a network contract
    // Only accepts calls from Rocket Pool network contracts
    function depositEther() override external payable onlyLatestNetworkContract {
        // Valid amount?
        require(msg.value > 0, "No valid amount of ETH given to deposit");
        // Get contract key
        string memory contractName = getContractName(msg.sender);
        // Update contract balance
        etherBalances[contractName] = etherBalances[contractName].add(msg.value);
        // Emit ether deposited event
        emit EtherDeposited(contractName, msg.value, block.timestamp);
    }
    // Withdraw an amount of ETH to a network contract
    // Only accepts calls from Rocket Pool network contracts
    function withdrawEther(uint256 _amount) override external onlyLatestNetworkContract {
        // Valid amount?
        require(_amount > 0, "No valid amount of ETH given to withdraw");
        // Get contract key
        string memory contractName = getContractName(msg.sender);
        // Check and update contract balance
        require(etherBalances[contractName] >= _amount, "Insufficient contract ETH balance");
        etherBalances[contractName] = etherBalances[contractName].sub(_amount);
        // Withdraw
        RocketVaultWithdrawerInterface withdrawer = RocketVaultWithdrawerInterface(msg.sender);
        withdrawer.receiveVaultWithdrawalETH{value: _amount}();
        // Emit ether withdrawn event
        emit EtherWithdrawn(contractName, _amount, block.timestamp);
    }
    // Accept an token deposit and assign its balance to a network contract (saves a large amount of gas this way through not needing a double token transfer via a network contract first)
    function depositToken(string memory _networkContractName, IERC20 _tokenContract, uint256 _amount) override external {
         // Valid amount?
        require(_amount > 0, "No valid amount of tokens given to deposit");
        // Make sure the network contract is valid (will throw if not)
        require(getContractAddress(_networkContractName) != address(0x0), "Not a valid network contract");
        // Get contract key
        bytes32 contractKey = keccak256(abi.encodePacked(_networkContractName, address(_tokenContract)));
        // Send the tokens to this contract now
        require(_tokenContract.transferFrom(msg.sender, address(this), _amount), "Token transfer was not successful");
        // Update contract balance
        tokenBalances[contractKey] = tokenBalances[contractKey].add(_amount);
        // Emit token transfer
        emit TokenDeposited(contractKey, address(_tokenContract), _amount, block.timestamp);
    }
    // Withdraw an amount of a ERC20 token to an address
    // Only accepts calls from Rocket Pool network contracts
    function withdrawToken(address _withdrawalAddress, IERC20 _tokenAddress, uint256 _amount) override external onlyLatestNetworkContract {
        // Valid amount?
        require(_amount > 0, "No valid amount of tokens given to withdraw");
        // Get contract key
        bytes32 contractKey = keccak256(abi.encodePacked(getContractName(msg.sender), _tokenAddress));
        // Update balances
        tokenBalances[contractKey] = tokenBalances[contractKey].sub(_amount);
        // Get the token ERC20 instance
        IERC20 tokenContract = IERC20(_tokenAddress);
        // Withdraw to the desired address
        require(tokenContract.transfer(_withdrawalAddress, _amount), "Rocket Vault token withdrawal unsuccessful");
        // Emit token withdrawn event
        emit TokenWithdrawn(contractKey, address(_tokenAddress), _amount, block.timestamp);
    }
    // Transfer token from one contract to another
    // Only accepts calls from Rocket Pool network contracts
    function transferToken(string memory _networkContractName, IERC20 _tokenAddress, uint256 _amount) override external onlyLatestNetworkContract {
        // Valid amount?
        require(_amount > 0, "No valid amount of tokens given to transfer");
        // Make sure the network contract is valid (will throw if not)
        require(getContractAddress(_networkContractName) != address(0x0), "Not a valid network contract");
        // Get contract keys
        bytes32 contractKeyFrom = keccak256(abi.encodePacked(getContractName(msg.sender), _tokenAddress));
        bytes32 contractKeyTo = keccak256(abi.encodePacked(_networkContractName, _tokenAddress));
        // Update balances
        tokenBalances[contractKeyFrom] = tokenBalances[contractKeyFrom].sub(_amount);
        tokenBalances[contractKeyTo] = tokenBalances[contractKeyTo].add(_amount);
        // Emit token withdrawn event
        emit TokenTransfer(contractKeyFrom, contractKeyTo, address(_tokenAddress), _amount, block.timestamp);
    }
    // Burns an amount of a token that implements a burn(uint256) method
    // Only accepts calls from Rocket Pool network contracts
    function burnToken(ERC20Burnable _tokenAddress, uint256 _amount) override external onlyLatestNetworkContract {
        // Get contract key
        bytes32 contractKey = keccak256(abi.encodePacked(getContractName(msg.sender), _tokenAddress));
        // Update balances
        tokenBalances[contractKey] = tokenBalances[contractKey].sub(_amount);
        // Get the token ERC20 instance
        ERC20Burnable tokenContract = ERC20Burnable(_tokenAddress);
        // Burn the tokens
        tokenContract.burn(_amount);
        // Emit token burn event
        emit TokenBurned(contractKey, address(_tokenAddress), _amount, block.timestamp);
    }
}
/**
  *       .
  *      / \\
  *     |.'.|
  *     |'.'|
  *   ,'|   |`.
  *  |,-'-|-'-.|
  *   __|_| |         _        _      _____           _
  *  | ___ \\|        | |      | |    | ___ \\         | |
  *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
  *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
  *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
  *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
  * +---------------------------------------------------+
  * |    DECENTRALISED STAKING PROTOCOL FOR ETHEREUM    |
  * +---------------------------------------------------+
  *
  *  Rocket Pool is a first-of-its-kind Ethereum staking pool protocol, designed to
  *  be community-owned, decentralised, and trustless.
  *
  *  For more information about Rocket Pool, visit https://rocketpool.net
  *
  *  Authors: David Rugendyke, Jake Pospischil, Kane Wallmann, Darren Langley, Joe Clapis, Nick Doherty
  *
  */
pragma solidity 0.7.6;
// SPDX-License-Identifier: GPL-3.0-only
interface RocketStorageInterface {
    // Deploy status
    function getDeployedStatus() external view returns (bool);
    // Guardian
    function getGuardian() external view returns(address);
    function setGuardian(address _newAddress) external;
    function confirmGuardian() external;
    // Getters
    function getAddress(bytes32 _key) external view returns (address);
    function getUint(bytes32 _key) external view returns (uint);
    function getString(bytes32 _key) external view returns (string memory);
    function getBytes(bytes32 _key) external view returns (bytes memory);
    function getBool(bytes32 _key) external view returns (bool);
    function getInt(bytes32 _key) external view returns (int);
    function getBytes32(bytes32 _key) external view returns (bytes32);
    // Setters
    function setAddress(bytes32 _key, address _value) external;
    function setUint(bytes32 _key, uint _value) external;
    function setString(bytes32 _key, string calldata _value) external;
    function setBytes(bytes32 _key, bytes calldata _value) external;
    function setBool(bytes32 _key, bool _value) external;
    function setInt(bytes32 _key, int _value) external;
    function setBytes32(bytes32 _key, bytes32 _value) external;
    // Deleters
    function deleteAddress(bytes32 _key) external;
    function deleteUint(bytes32 _key) external;
    function deleteString(bytes32 _key) external;
    function deleteBytes(bytes32 _key) external;
    function deleteBool(bytes32 _key) external;
    function deleteInt(bytes32 _key) external;
    function deleteBytes32(bytes32 _key) external;
    // Arithmetic
    function addUint(bytes32 _key, uint256 _amount) external;
    function subUint(bytes32 _key, uint256 _amount) external;
    // Protected storage
    function getNodeWithdrawalAddress(address _nodeAddress) external view returns (address);
    function getNodePendingWithdrawalAddress(address _nodeAddress) external view returns (address);
    function setWithdrawalAddress(address _nodeAddress, address _newWithdrawalAddress, bool _confirm) external;
    function confirmWithdrawalAddress(address _nodeAddress) external;
}
/**
  *       .
  *      / \\
  *     |.'.|
  *     |'.'|
  *   ,'|   |`.
  *  |,-'-|-'-.|
  *   __|_| |         _        _      _____           _
  *  | ___ \\|        | |      | |    | ___ \\         | |
  *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
  *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
  *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
  *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
  * +---------------------------------------------------+
  * |    DECENTRALISED STAKING PROTOCOL FOR ETHEREUM    |
  * +---------------------------------------------------+
  *
  *  Rocket Pool is a first-of-its-kind Ethereum staking pool protocol, designed to
  *  be community-owned, decentralised, and trustless.
  *
  *  For more information about Rocket Pool, visit https://rocketpool.net
  *
  *  Authors: David Rugendyke, Jake Pospischil, Kane Wallmann, Darren Langley, Joe Clapis, Nick Doherty
  *
  */
pragma solidity 0.7.6;
// SPDX-License-Identifier: GPL-3.0-only
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20Burnable.sol";
interface RocketVaultInterface {
    function balanceOf(string memory _networkContractName) external view returns (uint256);
    function depositEther() external payable;
    function withdrawEther(uint256 _amount) external;
    function depositToken(string memory _networkContractName, IERC20 _tokenAddress, uint256 _amount) external;
    function withdrawToken(address _withdrawalAddress, IERC20 _tokenAddress, uint256 _amount) external;
    function balanceOfToken(string memory _networkContractName, IERC20 _tokenAddress) external view returns (uint256);
    function transferToken(string memory _networkContractName, IERC20 _tokenAddress, uint256 _amount) external;
    function burnToken(ERC20Burnable _tokenAddress, uint256 _amount) external;
}
/**
  *       .
  *      / \\
  *     |.'.|
  *     |'.'|
  *   ,'|   |`.
  *  |,-'-|-'-.|
  *   __|_| |         _        _      _____           _
  *  | ___ \\|        | |      | |    | ___ \\         | |
  *  | |_/ /|__   ___| | _____| |_   | |_/ /__   ___ | |
  *  |    // _ \\ / __| |/ / _ \\ __|  |  __/ _ \\ / _ \\| |
  *  | |\\ \\ (_) | (__|   <  __/ |_   | | | (_) | (_) | |
  *  \\_| \\_\\___/ \\___|_|\\_\\___|\\__|  \\_|  \\___/ \\___/|_|
  * +---------------------------------------------------+
  * |    DECENTRALISED STAKING PROTOCOL FOR ETHEREUM    |
  * +---------------------------------------------------+
  *
  *  Rocket Pool is a first-of-its-kind Ethereum staking pool protocol, designed to
  *  be community-owned, decentralised, and trustless.
  *
  *  For more information about Rocket Pool, visit https://rocketpool.net
  *
  *  Authors: David Rugendyke, Jake Pospischil, Kane Wallmann, Darren Langley, Joe Clapis, Nick Doherty
  *
  */
pragma solidity 0.7.6;
// SPDX-License-Identifier: GPL-3.0-only
interface RocketVaultWithdrawerInterface {
    function receiveVaultWithdrawalETH() external payable; 
}