// File: contracts/jobs/CrvStrategyKeep3rStealthJob2.sol



// SPDX-License-Identifier: MIT

pragma solidity 0.8.4;

import "@lbertenasco/contract-utils/contracts/abstract/MachineryReady.sol";
import "@lbertenasco/contract-utils/contracts/keep3r/Keep3rAbstract.sol";
import "@lbertenasco/bonded-stealth-tx/contracts/utils/OnlyStealthRelayer.sol";

import "../interfaces/jobs/ICrvStrategyKeep3rJob.sol";
import "../interfaces/jobs/ICrvStrategyKeep3rJobV2.sol";
import "../interfaces/jobs/v2/IV2Keeper.sol";
import "../interfaces/keep3r/IKeep3rEscrow.sol";
import "../interfaces/stealth/IStealthRelayer.sol";

import "../interfaces/yearn/IV1Controller.sol";
import "../interfaces/yearn/IV1Vault.sol";
import "../interfaces/yearn/IBaseStrategy.sol";
import "../interfaces/crv/ICrvStrategy.sol";
import "../interfaces/crv/ICrvClaimable.sol";

contract CrvStrategyKeep3rStealthJob2 is MachineryReady, OnlyStealthRelayer, Keep3r, ICrvStrategyKeep3rJob, ICrvStrategyKeep3rJobV2 {
    using EnumerableSet for EnumerableSet.AddressSet;

    uint256 public constant PRECISION = 1_000;
    uint256 public constant MAX_REWARD_MULTIPLIER = 1 * PRECISION; // 1x max reward multiplier
    uint256 public override rewardMultiplier = MAX_REWARD_MULTIPLIER;

    mapping(address => uint256) public override requiredHarvest;
    mapping(address => uint256) public override requiredEarn;
    mapping(address => uint256) public override lastWorkAt;
    mapping(address => bool) public override strategyIsV1;

    uint256 public override maxHarvestPeriod;
    uint256 public override lastHarvest;
    uint256 public override harvestCooldown;

    EnumerableSet.AddressSet internal _availableStrategies;

    // v2 specific
    address public override v2Keeper;

    constructor(
        address _mechanicsRegistry,
        address _stealthRelayer,
        address _keep3r,
        address _bond,
        uint256 _minBond,
        uint256 _earned,
        uint256 _age,
        bool _onlyEOA,
        uint256 _maxHarvestPeriod,
        uint256 _harvestCooldown,
        address _v2Keeper
    ) MachineryReady(_mechanicsRegistry) OnlyStealthRelayer(_stealthRelayer) Keep3r(_keep3r) {
        _setKeep3rRequirements(_bond, _minBond, _earned, _age, _onlyEOA);
        _setMaxHarvestPeriod(_maxHarvestPeriod);
        _setHarvestCooldown(_harvestCooldown);
        v2Keeper = _v2Keeper;
    }

    // Stealth Relayer Setters
    function setStealthRelayer(address _stealthRelayer) external override onlyGovernor {
        _setStealthRelayer(_stealthRelayer);
    }

    // Keep3r Setters
    function setKeep3r(address _keep3r) external override onlyGovernor {
        _setKeep3r(_keep3r);
    }

    function setKeep3rRequirements(
        address _bond,
        uint256 _minBond,
        uint256 _earned,
        uint256 _age,
        bool _onlyEOA
    ) external override onlyGovernor {
        _setKeep3rRequirements(_bond, _minBond, _earned, _age, _onlyEOA);
    }

    function setV2Keep3r(address _v2Keeper) external override onlyGovernor {
        v2Keeper = _v2Keeper;
    }

    function setRewardMultiplier(uint256 _rewardMultiplier) external override onlyGovernorOrMechanic {
        _setRewardMultiplier(_rewardMultiplier);
        emit SetRewardMultiplier(_rewardMultiplier);
    }

    function _setRewardMultiplier(uint256 _rewardMultiplier) internal {
        require(_rewardMultiplier <= MAX_REWARD_MULTIPLIER, "CrvStrategyKeep3rJob::set-reward-multiplier:multiplier-exceeds-max");
        rewardMultiplier = _rewardMultiplier;
    }

    // Setters
    function addStrategies(
        address[] calldata _strategies,
        uint256[] calldata _requiredHarvests,
        uint256[] calldata _requiredEarns
    ) external override onlyGovernorOrMechanic {
        require(
            _strategies.length == _requiredHarvests.length && _strategies.length == _requiredEarns.length,
            "CrvStrategyKeep3rJob::add-strategies:strategies-required-harvests-and-earns-different-length"
        );
        for (uint256 i; i < _strategies.length; i++) {
            _addStrategy(_strategies[i], _requiredHarvests[i], _requiredEarns[i]);
        }
    }

    function addStrategy(
        address _strategy,
        uint256 _requiredHarvest,
        uint256 _requiredEarn
    ) external override onlyGovernorOrMechanic {
        _addStrategy(_strategy, _requiredHarvest, _requiredEarn);
    }

    function _addStrategy(
        address _strategy,
        uint256 _requiredHarvest,
        uint256 _requiredEarn
    ) internal {
        require(requiredHarvest[_strategy] == 0, "CrvStrategyKeep3rJob::add-strategy:strategy-already-added");
        _setRequiredHarvest(_strategy, _requiredHarvest);
        _setRequiredEarn(_strategy, _requiredEarn);
        _availableStrategies.add(_strategy);
        lastWorkAt[_strategy] = block.timestamp;
        emit StrategyAdded(_strategy, _requiredHarvest, _requiredEarn);
    }

    function updateStrategies(
        address[] calldata _strategies,
        uint256[] calldata _requiredHarvests,
        uint256[] calldata _requiredEarns
    ) external override onlyGovernorOrMechanic {
        require(
            _strategies.length == _requiredHarvests.length && _strategies.length == _requiredEarns.length,
            "CrvStrategyKeep3rJob::update-strategies:strategies-required-harvests-and-earns-different-length"
        );
        for (uint256 i; i < _strategies.length; i++) {
            _updateStrategy(_strategies[i], _requiredHarvests[i], _requiredEarns[i]);
        }
    }

    function updateStrategy(
        address _strategy,
        uint256 _requiredHarvest,
        uint256 _requiredEarn
    ) external override onlyGovernorOrMechanic {
        _updateStrategy(_strategy, _requiredHarvest, _requiredEarn);
    }

    function _updateStrategy(
        address _strategy,
        uint256 _requiredHarvest,
        uint256 _requiredEarn
    ) internal {
        require(requiredHarvest[_strategy] > 0, "CrvStrategyKeep3rJob::update-required-harvest:strategy-not-added");
        _setRequiredHarvest(_strategy, _requiredHarvest);
        _setRequiredEarn(_strategy, _requiredEarn);
        emit StrategyModified(_strategy, _requiredHarvest, _requiredEarn);
    }

    function removeStrategy(address _strategy) external override onlyGovernorOrMechanic {
        require(requiredHarvest[_strategy] > 0, "CrvStrategyKeep3rJob::remove-strategy:strategy-not-added");
        requiredHarvest[_strategy] = 0;
        _availableStrategies.remove(_strategy);
        emit StrategyRemoved(_strategy);
    }

    function _setRequiredHarvest(address _strategy, uint256 _requiredHarvest) internal {
        require(_requiredHarvest > 0, "CrvStrategyKeep3rJob::set-required-harvest:should-not-be-zero");
        requiredHarvest[_strategy] = _requiredHarvest;
    }

    function _setRequiredEarn(address _strategy, uint256 _requiredEarn) internal {
        require(_requiredEarn > 0, "CrvStrategyKeep3rJob::set-required-earn:should-not-be-zero");
        try ICrvStrategy(_strategy).controller() {
            strategyIsV1[_strategy] = true;
        } catch {}
        requiredEarn[_strategy] = _requiredEarn;
    }

    function setMaxHarvestPeriod(uint256 _maxHarvestPeriod) external override onlyGovernorOrMechanic {
        _setMaxHarvestPeriod(_maxHarvestPeriod);
    }

    function _setMaxHarvestPeriod(uint256 _maxHarvestPeriod) internal {
        require(_maxHarvestPeriod > 0, "CrvStrategyKeep3rJob::set-max-harvest-period:should-not-be-zero");
        maxHarvestPeriod = _maxHarvestPeriod;
    }

    function setHarvestCooldown(uint256 _harvestCooldown) external override onlyGovernorOrMechanic {
        _setHarvestCooldown(_harvestCooldown);
    }

    function _setHarvestCooldown(uint256 _harvestCooldown) internal {
        harvestCooldown = _harvestCooldown;
    }

    // Getters
    function strategies() public view override returns (address[] memory _strategies) {
        _strategies = new address[](_availableStrategies.length());
        for (uint256 i; i < _availableStrategies.length(); i++) {
            _strategies[i] = _availableStrategies.at(i);
        }
    }

    // Keeper view actions
    function calculateHarvest(address _strategy) public override returns (uint256 _amount) {
        require(requiredHarvest[_strategy] > 0, "CrvStrategyKeep3rJob::calculate-harvest:strategy-not-added");
        address _gauge = ICrvStrategy(_strategy).gauge();
        address _voter = strategyIsV1[_strategy] ? ICrvStrategy(ICrvStrategy(_strategy).proxy()).proxy() : ICrvStrategy(_strategy).voter();
        return ICrvClaimable(_gauge).claimable_tokens(_voter);
    }

    function workable(address _strategy) external override notPaused returns (bool) {
        return _workable(_strategy);
    }

    function _workable(address _strategy) internal returns (bool) {
        require(requiredHarvest[_strategy] > 0, "CrvStrategyKeep3rJob::workable:strategy-not-added");
        // ensures no other strategy has been harvested for at least the harvestCooldown
        if (block.timestamp < lastHarvest + harvestCooldown) return false;
        // if strategy has exceeded maxHarvestPeriod, force workable true
        if (block.timestamp > lastWorkAt[_strategy] + maxHarvestPeriod) return true;
        // if V2, check harvestTrigger for "earn"
        if (!strategyIsV1[_strategy] && IBaseStrategy(_strategy).harvestTrigger(requiredEarn[_strategy])) return true;
        return calculateHarvest(_strategy) >= requiredHarvest[_strategy];
    }

    // Keeper actions
    function _work(address _strategy) internal returns (uint256 _credits) {
        uint256 _initialGas = gasleft();
        require(_workable(_strategy), "CrvStrategyKeep3rJob::harvest:not-workable");

        _workInternal(_strategy);

        _credits = _calculateCredits(_initialGas);

        emit Worked(_strategy, msg.sender, _credits);
    }

    function _workInternal(address _strategy) internal {
        if (strategyIsV1[_strategy]) {
            _workV1(_strategy);
        } else {
            _workV2(_strategy);
        }
        _postWork(_strategy);
    }

    function _workV1(address _strategy) internal {
        // Checks if vault has enough available amount to earn
        address controller = ICrvStrategy(_strategy).controller();
        address want = ICrvStrategy(_strategy).want();
        address vault = IV1Controller(controller).vaults(want);
        uint256 available = IV1Vault(vault).available();
        if (available >= requiredEarn[_strategy]) {
            IV1Vault(vault).earn();
        }
        ICrvStrategy(_strategy).harvest();
    }

    function _workV2(address _strategy) internal {
        IV2Keeper(v2Keeper).harvest(_strategy);
    }

    function work(address _strategy) external override notPaused onlyStealthRelayer returns (uint256 _credits) {
        address _keeper = IStealthRelayer(stealthRelayer).caller();
        _isKeeper(_keeper);
        _credits = _work(_strategy);
        _paysKeeperAmount(_keeper, _credits);
    }

    function _calculateCredits(uint256 _initialGas) internal view returns (uint256 _credits) {
        // Gets default credits from KP3R_Helper and applies job reward multiplier
        return (_getQuoteLimitFor(msg.sender, _initialGas) * rewardMultiplier) / PRECISION;
    }

    // Mechanics keeper bypass
    function forceWork(address _strategy) external override onlyStealthRelayer {
        address _caller = IStealthRelayer(stealthRelayer).caller();
        require(isGovernor(_caller) || isMechanic(_caller), "V2Keep3rStealthJob::forceWork:invalid-stealth-caller");
        _forceWork(_strategy);
    }

    function forceWorkUnsafe(address _strategy) external override onlyGovernorOrMechanic {
        _forceWork(_strategy);
    }

    function _forceWork(address _strategy) internal {
        _workInternal(_strategy);
        emit ForceWorked(_strategy);
    }

    function _postWork(address _strategy) internal {
        lastWorkAt[_strategy] = block.timestamp;
        lastHarvest = block.timestamp;
    }
}

// File: @lbertenasco/contract-utils/contracts/abstract/MachineryReady.sol



// SPDX-License-Identifier: MIT

pragma solidity 0.8.4;

import './UtilsReady.sol';
import '../utils/Machinery.sol';

abstract
contract MachineryReady is UtilsReady, Machinery {

  constructor(address _mechanicsRegistry) Machinery(_mechanicsRegistry) UtilsReady() {
  }

  // Machinery: restricted-access
  function setMechanicsRegistry(address _mechanicsRegistry) external override onlyGovernor {
    _setMechanicsRegistry(_mechanicsRegistry);
  }

  // Machinery: modifiers
  modifier onlyGovernorOrMechanic() {
    require(isGovernor(msg.sender) || isMechanic(msg.sender), "Machinery::onlyGovernorOrMechanic:invalid-msg-sender");
    _;
  }

}

// File: @lbertenasco/contract-utils/contracts/keep3r/Keep3rAbstract.sol



// SPDX-License-Identifier: MIT

pragma solidity 0.8.4;

import '../../interfaces/keep3r/IKeep3rV1.sol';
import '../../interfaces/keep3r/IKeep3r.sol';

abstract
contract Keep3r is IKeep3r {

  IKeep3rV1 internal _Keep3r;
  address public override bond;
  uint256 public override minBond;
  uint256 public override earned;
  uint256 public override age;
  bool public override onlyEOA;

  constructor(address _keep3r) {
    _setKeep3r(_keep3r);
  }

  // Setters
  function _setKeep3r(address _keep3r) internal {
    _Keep3r = IKeep3rV1(_keep3r);
    emit Keep3rSet(_keep3r);
  }

  function _setKeep3rRequirements(address _bond, uint256 _minBond, uint256 _earned, uint256 _age, bool _onlyEOA) internal {
    bond = _bond;
    minBond = _minBond;
    earned = _earned;
    age = _age;
    onlyEOA = _onlyEOA;
    emit Keep3rRequirementsSet(_bond, _minBond, _earned, _age, _onlyEOA);
  }

  // Modifiers
  // Only checks if caller is a valid keeper, payment should be handled manually
  modifier onlyKeeper(address _keeper) {
    _isKeeper(_keeper);
    _;
  }

  // view
  function keep3r() external view override returns (address _keep3r) {
    return address(_Keep3r);
  }

  // handles default payment after execution
  modifier paysKeeper(address _keeper) {
    _;
    _paysKeeper(_keeper);
  }

  // Internal helpers
  function _isKeeper(address _keeper) internal {
    if (onlyEOA) require(_keeper == tx.origin, "keep3r::isKeeper:keeper-is-not-eoa");
    if (minBond == 0 && earned == 0 && age == 0) {
      // If no custom keeper requirements are set, just evaluate if sender is a registered keeper
      require(_Keep3r.isKeeper(_keeper), "keep3r::isKeeper:keeper-is-not-registered");
    } else {
      if (bond == address(0)) {
        // Checks for min KP3R, earned and age.
        require(_Keep3r.isMinKeeper(_keeper, minBond, earned, age), "keep3r::isKeeper:keeper-not-min-requirements");
      } else {
        // Checks for min custom-bond, earned and age.
        require(_Keep3r.isBondedKeeper(_keeper, bond, minBond, earned, age), "keep3r::isKeeper:keeper-not-custom-min-requirements");
      }
    }
  }

  function _getQuoteLimitFor(address _for, uint256 _initialGas) internal view returns (uint256 _credits) {
    return _Keep3r.KPRH().getQuoteLimitFor(_for, _initialGas - gasleft());
  }

  // pays in bonded KP3R after execution
  function _paysKeeper(address _keeper) internal {
    _Keep3r.worked(_keeper);
  }
  // pays _amount in KP3R after execution
  function _paysKeeperInTokens(address _keeper, uint256 _amount) internal {
    _Keep3r.receipt(address(_Keep3r), _keeper, _amount);
  }
  // pays _amount in bonded KP3R after execution
  function _paysKeeperAmount(address _keeper, uint256 _amount) internal {
    _Keep3r.workReceipt(_keeper, _amount);
  }
  // pays _amount in _credit after execution
  function _paysKeeperCredit(address _credit, address _keeper, uint256 _amount) internal {
    _Keep3r.receipt(_credit, _keeper, _amount);
  }
  // pays _amount in ETH after execution
  function _paysKeeperEth(address _keeper, uint256 _amount) internal {
    _Keep3r.receiptETH(_keeper, _amount);
  }
}

// File: @lbertenasco/bonded-stealth-tx/contracts/utils/OnlyStealthRelayer.sol



// SPDX-License-Identifier: MIT

pragma solidity 0.8.4;

interface IOnlyStealthRelayer {
  event StealthRelayerSet(address _stealthRelayer);

  function stealthRelayer() external view returns (address _stealthRelayer);

  function setStealthRelayer(address _stealthRelayer) external;
}

/*
 * OnlyStealthRelayerAbstract
 */
abstract contract OnlyStealthRelayer is IOnlyStealthRelayer {
  address public override stealthRelayer;

  constructor(address _stealthRelayer) {
    _setStealthRelayer(_stealthRelayer);
  }

  modifier onlyStealthRelayer() {
    require(stealthRelayer == address(0) || msg.sender == stealthRelayer, 'OnlyStealthRelayer::not-relayer');
    _;
  }

  function _setStealthRelayer(address _stealthRelayer) internal {
    stealthRelayer = _stealthRelayer;
    emit StealthRelayerSet(_stealthRelayer);
  }
}

// File: contracts/interfaces/jobs/ICrvStrategyKeep3rJob.sol



// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;

import "./IKeep3rJob.sol";

interface ICrvStrategyKeep3rJob is IKeep3rJob {
    event StrategyAdded(address _strategy, uint256 _requiredHarvest, uint256 _requiredEarn);
    event StrategyModified(address _strategy, uint256 _requiredHarvest, uint256 _requiredEarn);
    event StrategyRemoved(address _strategy);

    // Actions by Keeper
    event Worked(address _strategy, address _keeper, uint256 _credits);

    // Actions forced by governor
    event ForceWorked(address _strategy);

    // Setters
    function addStrategies(
        address[] calldata _strategies,
        uint256[] calldata _requiredHarvests,
        uint256[] calldata _requiredEarns
    ) external;

    function addStrategy(
        address _strategy,
        uint256 _requiredHarvest,
        uint256 _requiredEarn
    ) external;

    function updateStrategies(
        address[] calldata _strategies,
        uint256[] calldata _requiredHarvests,
        uint256[] calldata _requiredEarns
    ) external;

    function updateStrategy(
        address _strategy,
        uint256 _requiredHarvest,
        uint256 _requiredEarn
    ) external;

    function removeStrategy(address _strategy) external;

    function setMaxHarvestPeriod(uint256 _maxHarvestPeriod) external;

    function setHarvestCooldown(uint256 _harvestCooldown) external;

    // Getters
    function strategies() external view returns (address[] memory _strategies);

    function workable(address _strategy) external returns (bool);

    function requiredHarvest(address _strategy) external view returns (uint256 _requiredHarvest);

    function requiredEarn(address _strategy) external view returns (uint256 _requiredEarn);

    function lastWorkAt(address _strategy) external view returns (uint256 _lastWorkAt);

    function maxHarvestPeriod() external view returns (uint256 _maxHarvestPeriod);

    function lastHarvest() external view returns (uint256 _lastHarvest);

    function harvestCooldown() external view returns (uint256 _harvestCooldown);

    function calculateHarvest(address _strategy) external returns (uint256 _amount);

    // Keeper actions
    function work(address _strategy) external returns (uint256 _credits);

    // Mechanics keeper bypass
    function forceWork(address _strategy) external;
}

// File: contracts/interfaces/jobs/ICrvStrategyKeep3rJobV2.sol



// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;

interface ICrvStrategyKeep3rJobV2 {
    function v2Keeper() external view returns (address _v2Keeper);

    function strategyIsV1(address _strategy) external view returns (bool);

    function setV2Keep3r(address _v2Keeper) external;

    function forceWorkUnsafe(address _strategy) external;
}

// File: contracts/interfaces/jobs/v2/IV2Keeper.sol



// SPDX-License-Identifier: MIT
pragma solidity >=0.6.8;

interface IV2Keeper {
    // Getters
    function jobs() external view returns (address[] memory);

    event JobAdded(address _job);
    event JobRemoved(address _job);

    // Setters
    function addJobs(address[] calldata _jobs) external;

    function addJob(address _job) external;

    function removeJob(address _job) external;

    // Jobs actions
    function tend(address _strategy) external;

    function harvest(address _strategy) external;
}

// File: contracts/interfaces/keep3r/IKeep3rEscrow.sol



// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;

import "@lbertenasco/contract-utils/interfaces/abstract/IUtilsReady.sol";

interface IKeep3rEscrow is IUtilsReady {
    function returnLPsToGovernance() external;

    function addLiquidityToJob(
        address liquidity,
        address job,
        uint256 amount
    ) external;

    function applyCreditToJob(
        address provider,
        address liquidity,
        address job
    ) external;

    function unbondLiquidityFromJob(
        address liquidity,
        address job,
        uint256 amount
    ) external;

    function removeLiquidityFromJob(address liquidity, address job) external;
}

// File: contracts/interfaces/stealth/IStealthRelayer.sol



// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;
import "./IStealthTx.sol";

interface IStealthRelayer is IStealthTx {
    function caller() external view returns (address _caller);

    function forceBlockProtection() external view returns (bool _forceBlockProtection);

    function jobs() external view returns (address[] memory _jobsList);

    function setForceBlockProtection(bool _forceBlockProtection) external;

    function addJobs(address[] calldata _jobsList) external;

    function addJob(address _job) external;

    function removeJobs(address[] calldata _jobsList) external;

    function removeJob(address _job) external;

    function execute(
        address _address,
        bytes memory _callData,
        bytes32 _stealthHash,
        uint256 _blockNumber
    ) external payable returns (bytes memory _returnData);

    function executeAndPay(
        address _address,
        bytes memory _callData,
        bytes32 _stealthHash,
        uint256 _blockNumber,
        uint256 _payment
    ) external payable returns (bytes memory _returnData);

    function executeWithoutBlockProtection(
        address _address,
        bytes memory _callData,
        bytes32 _stealthHash
    ) external payable returns (bytes memory _returnData);

    function executeWithoutBlockProtectionAndPay(
        address _job,
        bytes memory _callData,
        bytes32 _stealthHash,
        uint256 _payment
    ) external payable returns (bytes memory _returnData);
}

// File: contracts/interfaces/yearn/IV1Controller.sol



// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;

interface IV1Controller {
    function stretegies(address _want) external view returns (address _strategy);

    function vaults(address _want) external view returns (address _vault);
}

// File: contracts/interfaces/yearn/IV1Vault.sol



// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;

interface IV1Vault {
    function token() external view returns (address);

    function underlying() external view returns (address);

    function name() external view returns (string memory);

    function symbol() external view returns (string memory);

    function decimals() external view returns (uint8);

    function controller() external view returns (address);

    function governance() external view returns (address);

    function getPricePerFullShare() external view returns (uint256);

    function available() external view returns (uint256);

    function earn() external;
}

// File: contracts/interfaces/yearn/IBaseStrategy.sol



// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;

interface IBaseStrategy {
    function vault() external view returns (address _vault);

    function strategist() external view returns (address _strategist);

    function rewards() external view returns (address _rewards);

    function keeper() external view returns (address _keeper);

    function want() external view returns (address _want);

    function name() external view returns (string memory _name);

    function profitFactor() external view returns (uint256 _profitFactor);

    function maxReportDelay() external view returns (uint256 _maxReportDelay);

    // custom view
    function crv() external view returns (address _crv);

    // Setters
    function setStrategist(address _strategist) external;

    function setKeeper(address _keeper) external;

    function setRewards(address _rewards) external;

    function tendTrigger(uint256 callCost) external view returns (bool);

    function tend() external;

    function harvestTrigger(uint256 callCost) external view returns (bool);

    function harvest() external;

    function setBorrowCollateralizationRatio(uint256 _c) external;
}

// File: contracts/interfaces/crv/ICrvStrategy.sol



// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;
import "./../yearn/IHarvestableStrategy.sol";

interface ICrvStrategy is IHarvestableStrategy {
    function gauge() external pure returns (address);

    function proxy() external pure returns (address);

    function voter() external pure returns (address);
}

// File: contracts/interfaces/crv/ICrvClaimable.sol



// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;

interface ICrvClaimable {
    function claimable_tokens(address _address) external returns (uint256 _amount);
}

// File: @lbertenasco/contract-utils/contracts/abstract/UtilsReady.sol



// SPDX-License-Identifier: MIT

pragma solidity 0.8.4;

import '../utils/Governable.sol';
import '../utils/CollectableDust.sol';
import '../utils/Pausable.sol';

abstract
contract UtilsReady is Governable, CollectableDust, Pausable {

  constructor() Governable(msg.sender) { }

  // Governable: restricted-access
  function setPendingGovernor(address _pendingGovernor) external override onlyGovernor {
    _setPendingGovernor(_pendingGovernor);
  }

  function acceptGovernor() external override onlyPendingGovernor {
    _acceptGovernor();
  }

  // Collectable Dust: restricted-access
  function sendDust(
    address _to,
    address _token,
    uint256 _amount
  ) external override virtual onlyGovernor {
    _sendDust(_to, _token, _amount);
  }

  // Pausable: restricted-access
  function pause(bool _paused) external override onlyGovernor {
    _pause(_paused);
  }

}

// File: @lbertenasco/contract-utils/contracts/utils/Machinery.sol



// SPDX-License-Identifier: MIT

pragma solidity 0.8.4;

import "@openzeppelin/contracts/utils/structs/EnumerableSet.sol";
import '../../interfaces/utils/IMachinery.sol';
import '../../interfaces/mechanics/IMechanicsRegistry.sol';

contract Machinery is IMachinery {
  using EnumerableSet for EnumerableSet.AddressSet;

  IMechanicsRegistry internal _mechanicsRegistry;

  constructor(address __mechanicsRegistry) {
    _setMechanicsRegistry(__mechanicsRegistry);
  }

  modifier onlyMechanic {
    require(_mechanicsRegistry.isMechanic(msg.sender), 'Machinery: not mechanic');
    _;
  }

  function setMechanicsRegistry(address __mechanicsRegistry) external virtual override {
    _setMechanicsRegistry(__mechanicsRegistry);
  }

  function _setMechanicsRegistry(address __mechanicsRegistry) internal {
    _mechanicsRegistry = IMechanicsRegistry(__mechanicsRegistry);
  }

  // View helpers
  function mechanicsRegistry() external view override returns (address _mechanicRegistry) {
    return address(_mechanicsRegistry);
  }

  function isMechanic(address _mechanic) public view override returns (bool _isMechanic) {
    return _mechanicsRegistry.isMechanic(_mechanic);
  }

}

// File: @lbertenasco/contract-utils/contracts/utils/Governable.sol



// SPDX-License-Identifier: MIT

pragma solidity 0.8.4;

import '../../interfaces/utils/IGovernable.sol';

contract Governable is IGovernable {
  address public override governor;
  address public override pendingGovernor;

  constructor(address _governor) {
    require(_governor != address(0), 'governable/governor-should-not-be-zero-address');
    governor = _governor;
  }

  function setPendingGovernor(address _pendingGovernor) external virtual override onlyGovernor {
    _setPendingGovernor(_pendingGovernor);
  }

  function acceptGovernor() external virtual override onlyPendingGovernor {
    _acceptGovernor();
  }

  function _setPendingGovernor(address _pendingGovernor) internal {
    require(_pendingGovernor != address(0), 'governable/pending-governor-should-not-be-zero-addres');
    pendingGovernor = _pendingGovernor;
    emit PendingGovernorSet(_pendingGovernor);
  }

  function _acceptGovernor() internal {
    governor = pendingGovernor;
    pendingGovernor = address(0);
    emit GovernorAccepted();
  }

  function isGovernor(address _account) public view override returns (bool _isGovernor) {
    return _account == governor;
  }

  modifier onlyGovernor {
    require(isGovernor(msg.sender), 'governable/only-governor');
    _;
  }

  modifier onlyPendingGovernor {
    require(msg.sender == pendingGovernor, 'governable/only-pending-governor');
    _;
  }
}

// File: @lbertenasco/contract-utils/contracts/utils/CollectableDust.sol




// SPDX-License-Identifier: MIT

pragma solidity 0.8.4;

import '@openzeppelin/contracts/utils/structs/EnumerableSet.sol';
import '@openzeppelin/contracts/token/ERC20/IERC20.sol';
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";

import '../../interfaces/utils/ICollectableDust.sol';

abstract
contract CollectableDust is ICollectableDust {
  using SafeERC20 for IERC20;
  using EnumerableSet for EnumerableSet.AddressSet;

  address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;
  EnumerableSet.AddressSet internal protocolTokens;

  constructor() {}

  function _addProtocolToken(address _token) internal {
    require(!protocolTokens.contains(_token), 'collectable-dust/token-is-part-of-the-protocol');
    protocolTokens.add(_token);
  }

  function _removeProtocolToken(address _token) internal {
    require(protocolTokens.contains(_token), 'collectable-dust/token-not-part-of-the-protocol');
    protocolTokens.remove(_token);
  }

  function _sendDust(
    address _to,
    address _token,
    uint256 _amount
  ) internal {
    require(_to != address(0), 'collectable-dust/cant-send-dust-to-zero-address');
    require(!protocolTokens.contains(_token), 'collectable-dust/token-is-part-of-the-protocol');
    if (_token == ETH_ADDRESS) {
      payable(_to).transfer(_amount);
    } else {
      IERC20(_token).safeTransfer(_to, _amount);
    }
    emit DustSent(_to, _token, _amount);
  }
}

// File: @lbertenasco/contract-utils/contracts/utils/Pausable.sol




// SPDX-License-Identifier: MIT

pragma solidity 0.8.4;

import '../../interfaces/utils/IPausable.sol';

abstract
contract Pausable is IPausable {
  bool public paused;

  constructor() {}
  
  modifier notPaused() {
    require(!paused, 'paused');
    _;
  }

  function _pause(bool _paused) internal {
    require(paused != _paused, 'no-change');
    paused = _paused;
    emit Paused(_paused);
  }

}

// File: @lbertenasco/contract-utils/interfaces/utils/IGovernable.sol



// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;

interface IGovernable {
  event PendingGovernorSet(address pendingGovernor);
  event GovernorAccepted();

  function setPendingGovernor(address _pendingGovernor) external;
  function acceptGovernor() external;

  function governor() external view returns (address _governor);
  function pendingGovernor() external view returns (address _pendingGovernor);

  function isGovernor(address _account) external view returns (bool _isGovernor);
}

// File: @openzeppelin/contracts/utils/structs/EnumerableSet.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev Library for managing
 * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
 * types.
 *
 * Sets have the following properties:
 *
 * - Elements are added, removed, and checked for existence in constant time
 * (O(1)).
 * - Elements are enumerated in O(n). No guarantees are made on the ordering.
 *
 * ```
 * contract Example {
 *     // Add the library methods
 *     using EnumerableSet for EnumerableSet.AddressSet;
 *
 *     // Declare a set state variable
 *     EnumerableSet.AddressSet private mySet;
 * }
 * ```
 *
 * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
 * and `uint256` (`UintSet`) are supported.
 */
library EnumerableSet {
    // To implement this library for multiple types with as little code
    // repetition as possible, we write it in terms of a generic Set type with
    // bytes32 values.
    // The Set implementation uses private functions, and user-facing
    // implementations (such as AddressSet) are just wrappers around the
    // underlying Set.
    // This means that we can only create new EnumerableSets for types that fit
    // in bytes32.

    struct Set {
        // Storage of set values
        bytes32[] _values;
        // Position of the value in the `values` array, plus 1 because index 0
        // means a value is not in the set.
        mapping(bytes32 => uint256) _indexes;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function _add(Set storage set, bytes32 value) private returns (bool) {
        if (!_contains(set, value)) {
            set._values.push(value);
            // The value is stored at length-1, but we add 1 to all indexes
            // and use 0 as a sentinel value
            set._indexes[value] = set._values.length;
            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function _remove(Set storage set, bytes32 value) private returns (bool) {
        // We read and store the value's index to prevent multiple reads from the same storage slot
        uint256 valueIndex = set._indexes[value];

        if (valueIndex != 0) {
            // Equivalent to contains(set, value)
            // To delete an element from the _values array in O(1), we swap the element to delete with the last one in
            // the array, and then remove the last element (sometimes called as 'swap and pop').
            // This modifies the order of the array, as noted in {at}.

            uint256 toDeleteIndex = valueIndex - 1;
            uint256 lastIndex = set._values.length - 1;

            if (lastIndex != toDeleteIndex) {
                bytes32 lastvalue = set._values[lastIndex];

                // Move the last value to the index where the value to delete is
                set._values[toDeleteIndex] = lastvalue;
                // Update the index for the moved value
                set._indexes[lastvalue] = valueIndex; // Replace lastvalue's index to valueIndex
            }

            // Delete the slot where the moved value was stored
            set._values.pop();

            // Delete the index for the deleted slot
            delete set._indexes[value];

            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function _contains(Set storage set, bytes32 value) private view returns (bool) {
        return set._indexes[value] != 0;
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function _length(Set storage set) private view returns (uint256) {
        return set._values.length;
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function _at(Set storage set, uint256 index) private view returns (bytes32) {
        return set._values[index];
    }

    // Bytes32Set

    struct Bytes32Set {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _add(set._inner, value);
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _remove(set._inner, value);
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
        return _contains(set._inner, value);
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(Bytes32Set storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
        return _at(set._inner, index);
    }

    // AddressSet

    struct AddressSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(AddressSet storage set, address value) internal returns (bool) {
        return _add(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(AddressSet storage set, address value) internal returns (bool) {
        return _remove(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(AddressSet storage set, address value) internal view returns (bool) {
        return _contains(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(AddressSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(AddressSet storage set, uint256 index) internal view returns (address) {
        return address(uint160(uint256(_at(set._inner, index))));
    }

    // UintSet

    struct UintSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(UintSet storage set, uint256 value) internal returns (bool) {
        return _add(set._inner, bytes32(value));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(UintSet storage set, uint256 value) internal returns (bool) {
        return _remove(set._inner, bytes32(value));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(UintSet storage set, uint256 value) internal view returns (bool) {
        return _contains(set._inner, bytes32(value));
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function length(UintSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(UintSet storage set, uint256 index) internal view returns (uint256) {
        return uint256(_at(set._inner, index));
    }
}

// File: @openzeppelin/contracts/token/ERC20/IERC20.sol



// SPDX-License-Identifier: MIT

pragma solidity ^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);
}

// File: @openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

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

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

    function safeTransferFrom(
        IERC20 token,
        address from,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

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

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

    function safeDecreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            uint256 newAllowance = oldAllowance - value;
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
        }
    }

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

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

// File: @lbertenasco/contract-utils/interfaces/utils/ICollectableDust.sol



// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;

interface ICollectableDust {
  event DustSent(address _to, address token, uint256 amount);

  function sendDust(address _to, address _token, uint256 _amount) external;
}

// File: @openzeppelin/contracts/utils/Address.sol



// SPDX-License-Identifier: MIT

pragma solidity ^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;
        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");

        (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");

        (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");

        (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");

        (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

                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

// File: @lbertenasco/contract-utils/interfaces/utils/IPausable.sol



// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;

interface IPausable {
  event Paused(bool _paused);

  function pause(bool _paused) external;
}

// File: @lbertenasco/contract-utils/interfaces/utils/IMachinery.sol



// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;

interface IMachinery {
    // View helpers
    function mechanicsRegistry() external view returns (address _mechanicsRegistry);
    function isMechanic(address mechanic) external view returns (bool _isMechanic);

    // Setters
    function setMechanicsRegistry(address _mechanicsRegistry) external;

}

// File: @lbertenasco/contract-utils/interfaces/mechanics/IMechanicsRegistry.sol



// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;

interface IMechanicsRegistry {
    event MechanicAdded(address _mechanic);
    event MechanicRemoved(address _mechanic);

    function addMechanic(address _mechanic) external;

    function removeMechanic(address _mechanic) external;

    function mechanics() external view returns (address[] memory _mechanicsList);

    function isMechanic(address mechanic) external view returns (bool _isMechanic);

}

// File: @lbertenasco/contract-utils/interfaces/keep3r/IKeep3rV1.sol



// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "./IKeep3rV1Helper.sol";

interface IKeep3rV1 is IERC20 {
    function name() external returns (string memory);
    function KPRH() external view returns (IKeep3rV1Helper);

    function isKeeper(address _keeper) external returns (bool);
    function isMinKeeper(address _keeper, uint256 _minBond, uint256 _earned, uint256 _age) external returns (bool);
    function isBondedKeeper(address _keeper, address _bond, uint256 _minBond, uint256 _earned, uint256 _age) external returns (bool);
    function addKPRCredit(address _job, uint256 _amount) external;
    function addJob(address _job) external;
    function removeJob(address _job) external;
    function addVotes(address voter, uint256 amount) external;
    function removeVotes(address voter, uint256 amount) external;
    function revoke(address keeper) external;

    function worked(address _keeper) external;
    function workReceipt(address _keeper, uint256 _amount) external;
    function receipt(address credit, address _keeper, uint256 _amount) external;
    function receiptETH(address _keeper, uint256 _amount) external;

    function addLiquidityToJob(address liquidity, address job, uint amount) external;
    function applyCreditToJob(address provider, address liquidity, address job) external;
    function unbondLiquidityFromJob(address liquidity, address job, uint amount) external;
    function removeLiquidityFromJob(address liquidity, address job) external;

    function jobs(address _job) external view returns (bool);
    function jobList(uint256 _index) external view returns (address _job);
    function credits(address _job, address _credit) external view returns (uint256 _amount);

    function liquidityAccepted(address _liquidity) external view returns (bool);

    function liquidityProvided(address _provider, address _liquidity, address _job) external view returns (uint256 _amount);
    function liquidityApplied(address _provider, address _liquidity, address _job) external view returns (uint256 _amount);
    function liquidityAmount(address _provider, address _liquidity, address _job) external view returns (uint256 _amount);
    
    function liquidityUnbonding(address _provider, address _liquidity, address _job) external view returns (uint256 _amount);
    function liquidityAmountsUnbonding(address _provider, address _liquidity, address _job) external view returns (uint256 _amount);

    function bond(address bonding, uint256 amount) external;
    function activate(address bonding) external;
    function unbond(address bonding, uint256 amount) external;
    function withdraw(address bonding) external;
}

// File: @lbertenasco/contract-utils/interfaces/keep3r/IKeep3r.sol



// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;
interface IKeep3r {
    event Keep3rSet(address _keep3r);
    event Keep3rRequirementsSet(address _bond, uint256 _minBond, uint256 _earned, uint256 _age, bool _onlyEOA);
    
    function keep3r() external view returns (address _keep3r);
    function bond() external view returns (address _bond);
    function minBond() external view returns (uint256 _minBond);
    function earned() external view returns (uint256 _earned);
    function age() external view returns (uint256 _age);
    function onlyEOA() external view returns (bool _onlyEOA);

    function setKeep3r(address _keep3r) external;
    function setKeep3rRequirements(address _bond, uint256 _minBond, uint256 _earned, uint256 _age, bool _onlyEOA) external;
}

// File: @lbertenasco/contract-utils/interfaces/keep3r/IKeep3rV1Helper.sol



// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;

interface IKeep3rV1Helper {
    function quote(uint256 eth) external view returns (uint256);

    function getFastGas() external view returns (uint256);

    function bonds(address keeper) external view returns (uint256);

    function getQuoteLimit(uint256 gasUsed) external view returns (uint256);

    function getQuoteLimitFor(address origin, uint256 gasUsed) external view returns (uint256);
}

// File: contracts/interfaces/jobs/IKeep3rJob.sol



// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;

interface IKeep3rJob {
    event SetRewardMultiplier(uint256 _rewardMultiplier);

    function rewardMultiplier() external view returns (uint256 _rewardMultiplier);

    function setRewardMultiplier(uint256 _rewardMultiplier) external;
}

// File: @lbertenasco/contract-utils/interfaces/abstract/IUtilsReady.sol



// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;
import '../utils/IGovernable.sol';
import '../utils/ICollectableDust.sol';
import '../utils/IPausable.sol';

interface IUtilsReady is IGovernable, ICollectableDust, IPausable {
}

// File: contracts/interfaces/stealth/IStealthTx.sol



// SPDX-License-Identifier: MIT

pragma solidity 0.8.4;

interface IStealthTx {
    event StealthVaultSet(address _stealthVault);
    event PenaltySet(uint256 _penalty);
    event MigratedStealthVault(address _migratedTo);

    function stealthVault() external view returns (address);

    function penalty() external view returns (uint256);

    function setStealthVault(address _stealthVault) external;

    function setPenalty(uint256 _penalty) external;
}

// File: contracts/interfaces/yearn/IHarvestableStrategy.sol



// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;

interface IHarvestableStrategy {
    function harvest() external;

    function controller() external view returns (address);

    function want() external view returns (address);
}