v0.5.1 (#223)

.gitignore

@@ -12,3 +12,4 @@ refs/
 .vscode
 remix-compiler.config.js
 foundry
+.npmrc

contracts/interfaces/staking/ICandidateStaking.sol

@@ -7,8 +7,8 @@ import "./IRewardPool.sol";
 interface ICandidateStaking is IRewardPool {
   /// @dev Emitted when the minimum staking amount for being a validator is updated.
   event MinValidatorStakingAmountUpdated(uint256 threshold);
-  /// @dev Emitted when the max commission rate is updated.
-  event MaxCommissionRateUpdated(uint256 maxRate);
+  /// @dev Emitted when the commission rate range is updated.
+  event CommissionRateRangeUpdated(uint256 minRate, uint256 maxRate);
 
   /// @dev Emitted when the pool admin staked for themself.
   event Staked(address indexed consensuAddr, uint256 amount);
@@ -57,9 +57,9 @@ interface ICandidateStaking is IRewardPool {
   function minValidatorStakingAmount() external view returns (uint256);
 
   /**
-   * @dev Returns the max commission rate that the candidate can set.
+   * @dev Returns the commission rate range that the candidate can set.
    */
-  function maxCommissionRate() external view returns (uint256);
+  function getCommissionRateRange() external view returns (uint256 _minRange, uint256 _maxRange);
 
   /**
    * @dev Sets the minimum threshold for being a validator candidate.
@@ -73,15 +73,15 @@ interface ICandidateStaking is IRewardPool {
   function setMinValidatorStakingAmount(uint256) external;
 
   /**
-   * @dev Sets the max commission rate that a candidate can set.
+   * @dev Sets the commission rate range that a candidate can set.
    *
    * Requirements:
    * - The method caller is admin.
    *
-   * Emits the `MaxCommissionRateUpdated` event.
+   * Emits the `CommissionRateRangeUpdated` event.
    *
    */
-  function setMaxCommissionRate(uint256 _maxRate) external;
+  function setCommissionRateRange(uint256 _minRate, uint256 _maxRate) external;
 
   /**
    * @dev Proposes a candidate to become a validator.

contracts/ronin/Maintenance.sol

@@ -98,9 +98,9 @@ contract Maintenance is IMaintenance, HasValidatorContract, Initializable {
       "Maintenance: start block is out of offset"
     );
     require(_startedAtBlock < _endedAtBlock, "Maintenance: start block must be less than end block");
-    uint256 _blockPeriod = _endedAtBlock - _startedAtBlock;
+    uint256 _maintenanceElapsed = _endedAtBlock - _startedAtBlock + 1;
     require(
-      _blockPeriod.inRange(minMaintenanceDurationInBlock, maxMaintenanceDurationInBlock),
+      _maintenanceElapsed.inRange(minMaintenanceDurationInBlock, maxMaintenanceDurationInBlock),
       "Maintenance: invalid maintenance duration"
     );
     require(_validator.epochEndingAt(_startedAtBlock - 1), "Maintenance: start block is not at the start of an epoch");

contracts/ronin/gateway/PauseEnforcer.sol

@@ -87,17 +87,6 @@ contract PauseEnforcer is AccessControlEnumerable {
     emit EmergencyUnpaused(msg.sender);
   }
 
-  /**
-   * @dev Helper function to reset emergency status.
-   */
-  function resetEmergency() external {
-    require(
-      hasRole(DEFAULT_ADMIN_ROLE, msg.sender) || hasRole(SENTRY_ROLE, msg.sender),
-      "PauseEnforcer: Unauthorized reset"
-    );
-    emergency = false;
-  }
-
   /**
    * @dev Setter for `target`.
    *

contracts/ronin/staking/CandidateStaking.sol

@@ -14,12 +14,14 @@ abstract contract CandidateStaking is BaseStaking, ICandidateStaking, GlobalConf
 
   /// @dev The max commission rate that the validator can set (in range of [0;100_00] means [0-100%])
   uint256 internal _maxCommissionRate;
+  /// @dev The min commission rate that the validator can set (in range of [0;100_00] means [0-100%])
+  uint256 internal _minCommissionRate;
 
   /**
    * @dev This empty reserved space is put in place to allow future versions to add new
    * variables without shifting down storage in the inheritance chain.
    */
-  uint256[49] ______gap;
+  uint256[48] ______gap;
 
   /**
    * @inheritdoc ICandidateStaking
@@ -31,8 +33,8 @@ abstract contract CandidateStaking is BaseStaking, ICandidateStaking, GlobalConf
   /**
    * @inheritdoc ICandidateStaking
    */
-  function maxCommissionRate() external view override returns (uint256) {
-    return _maxCommissionRate;
+  function getCommissionRateRange() external view override returns (uint256, uint256) {
+    return (_minCommissionRate, _maxCommissionRate);
   }
 
   /**
@@ -45,8 +47,8 @@ abstract contract CandidateStaking is BaseStaking, ICandidateStaking, GlobalConf
   /**
    * @inheritdoc ICandidateStaking
    */
-  function setMaxCommissionRate(uint256 _maxRate) external override onlyAdmin {
-    _setMaxCommissionRate(_maxRate);
+  function setCommissionRateRange(uint256 _minRate, uint256 _maxRate) external override onlyAdmin {
+    _setCommissionRateRange(_minRate, _maxRate);
   }
 
   /**
@@ -60,7 +62,7 @@ abstract contract CandidateStaking is BaseStaking, ICandidateStaking, GlobalConf
     uint256 _commissionRate
   ) external payable override nonReentrant {
     if (isAdminOfActivePool(msg.sender)) revert ErrAdminOfAnyActivePoolForbidden(msg.sender);
-    if (_commissionRate > _maxCommissionRate) revert ErrInvalidCommissionRate();
+    if (_commissionRate > _maxCommissionRate || _commissionRate < _minCommissionRate) revert ErrInvalidCommissionRate();
 
     uint256 _amount = msg.value;
     address payable _poolAdmin = payable(msg.sender);
@@ -91,7 +93,7 @@ abstract contract CandidateStaking is BaseStaking, ICandidateStaking, GlobalConf
     uint256 _effectiveDaysOnwards,
     uint256 _commissionRate
   ) external override poolIsActive(_consensusAddr) onlyPoolAdmin(_stakingPool[_consensusAddr], msg.sender) {
-    if (_commissionRate > _maxCommissionRate) revert ErrInvalidCommissionRate();
+    if (_commissionRate > _maxCommissionRate || _commissionRate < _minCommissionRate) revert ErrInvalidCommissionRate();
     _validatorContract.execRequestUpdateCommissionRate(_consensusAddr, _effectiveDaysOnwards, _commissionRate);
   }
 
@@ -192,8 +194,6 @@ abstract contract CandidateStaking is BaseStaking, ICandidateStaking, GlobalConf
     if (!_unsafeSendRON(_poolAdmin, 0)) revert ErrCannotInitTransferRON(_poolAdmin, "pool admin");
     if (!_unsafeSendRON(_treasuryAddr, 0)) revert ErrCannotInitTransferRON(_treasuryAddr, "treasury");
     if (_amount < _minValidatorStakingAmount) revert ErrInsufficientStakingAmount();
-    if (_commissionRate > _maxCommissionRate) revert ErrInvalidCommissionRate();
-
     if (_poolAdmin != _candidateAdmin || _candidateAdmin != _treasuryAddr) revert ErrThreeInteractionAddrsNotEqual();
 
     address[] memory _diffAddrs = new address[](3);
@@ -269,9 +269,10 @@ abstract contract CandidateStaking is BaseStaking, ICandidateStaking, GlobalConf
    * Emits the `MaxCommissionRateUpdated` event.
    *
    */
-  function _setMaxCommissionRate(uint256 _maxRate) internal {
-    if (_maxRate > _MAX_PERCENTAGE) revert ErrInvalidCommissionRate();
+  function _setCommissionRateRange(uint256 _minRate, uint256 _maxRate) internal {
+    if (_maxRate > _MAX_PERCENTAGE || _minRate > _maxRate) revert ErrInvalidCommissionRate();
     _maxCommissionRate = _maxRate;
-    emit MaxCommissionRateUpdated(_maxRate);
+    _minCommissionRate = _minRate;
+    emit CommissionRateRangeUpdated(_minRate, _maxRate);
   }
 }

contracts/ronin/staking/DelegatorStaking.sol

@@ -150,9 +150,12 @@ abstract contract DelegatorStaking is BaseStaking, IDelegatorStaking {
   ) private notPoolAdmin(_pool, _delegator) {
     if (_amount == 0) revert ErrUndelegateZeroAmount();
     if (_pool.delegatingAmount[_delegator] < _amount) revert ErrInsufficientDelegatingAmount();
-    if (_pool.lastDelegatingTimestamp[_delegator] + _cooldownSecsToUndelegate >= block.timestamp) {
-      revert ErrUndelegateTooEarly();
-    }
+
+    if (
+      _validatorContract.isValidatorCandidate(_pool.addr) &&
+      _validatorContract.getCandidateInfo(_pool.addr).revokingTimestamp == 0 && // if candidate is not on renunciation
+      _pool.lastDelegatingTimestamp[_delegator] + _cooldownSecsToUndelegate >= block.timestamp // delegator is still in cooldown
+    ) revert ErrUndelegateTooEarly();
 
     _changeDelegatingAmount(
       _pool,

contracts/ronin/staking/Staking.sol

@@ -30,7 +30,7 @@ contract Staking is IStaking, CandidateStaking, DelegatorStaking, Initializable
   ) external initializer {
     _setValidatorContract(__validatorContract);
     _setMinValidatorStakingAmount(__minValidatorStakingAmount);
-    _setMaxCommissionRate(__maxCommissionRate);
+    _setCommissionRateRange(0, __maxCommissionRate);
     _setCooldownSecsToUndelegate(__cooldownSecsToUndelegate);
     _setWaitingSecsToRevoke(__waitingSecsToRevoke);
   }

contracts/ronin/validator/CoinbaseExecution.sol

@@ -80,8 +80,8 @@ abstract contract CoinbaseExecution is
     }
 
     _reward -= _cutOffReward;
-    uint256 _maxRate = _stakingContract.maxCommissionRate();
-    uint256 _rate = Math.min(_candidateInfo[msg.sender].commissionRate, _maxRate);
+    (uint256 _minRate, uint256 _maxRate) = _stakingContract.getCommissionRateRange();
+    uint256 _rate = Math.max(Math.min(_candidateInfo[msg.sender].commissionRate, _maxRate), _minRate);
     uint256 _miningAmount = (_rate * _reward) / _MAX_PERCENTAGE;
     _miningReward[msg.sender] += _miningAmount;