Merge pull request #188 from keep-network/chaosnet

Chaosnet

Author: dimpar

contracts/Chaosnet.sol

@@ -0,0 +1,84 @@
+pragma solidity 0.8.9;
+
+/// @title Chaosnet
+/// @notice This is a beta staker program for stakers willing to go the extra
+/// mile with monitoring, share their logs with the dev team, and allow to more
+/// carefully monitor the bootstrapping network. As the network matures, the
+/// beta program will be ended.
+contract Chaosnet {
+  /// @notice Indicates if the chaosnet is active. The chaosnet is active
+  /// after the contract deployment and can be ended with a call to
+  /// `deactivateChaosnet()`. Once deactivated chaosnet can not be activated
+  /// again.
+  bool public isChaosnetActive;
+
+  /// @notice Indicates if the given operator is a beta operator for chaosnet.
+  mapping(address => bool) public isBetaOperator;
+
+  /// @notice Address controlling chaosnet status and beta operator addresses.
+  address public chaosnetOwner;
+
+  event BetaOperatorsAdded(address[] operators);
+
+  event ChaosnetOwnerRoleTransferred(
+    address oldChaosnetOwner,
+    address newChaosnetOwner
+  );
+
+  event ChaosnetDeactivated();
+
+  constructor() {
+    _transferChaosnetOwner(msg.sender);
+    isChaosnetActive = true;
+  }
+
+  modifier onlyChaosnetOwner() {
+    require(msg.sender == chaosnetOwner, "Not the chaosnet owner");
+    _;
+  }
+
+  modifier onlyOnChaosnet() {
+    require(isChaosnetActive, "Chaosnet is not active");
+    _;
+  }
+
+  /// @notice Adds beta operator to chaosnet. Can be called only by the
+  /// chaosnet owner when the chaosnet is active. Once the operator is added
+  /// as a beta operator, it can not be removed.
+  function addBetaOperators(address[] calldata operators)
+    public
+    onlyOnChaosnet
+    onlyChaosnetOwner
+  {
+    for (uint256 i = 0; i < operators.length; i++) {
+      isBetaOperator[operators[i]] = true;
+    }
+
+    emit BetaOperatorsAdded(operators);
+  }
+
+  /// @notice Deactivates the chaosnet. Can be called only by the chaosnet
+  /// owner. Once deactivated chaosnet can not be activated again.
+  function deactivateChaosnet() public onlyOnChaosnet onlyChaosnetOwner {
+    isChaosnetActive = false;
+    emit ChaosnetDeactivated();
+  }
+
+  /// @notice Transfers the chaosnet owner role to another non-zero address.
+  function transferChaosnetOwnerRole(address newChaosnetOwner)
+    public
+    onlyChaosnetOwner
+  {
+    require(
+      newChaosnetOwner != address(0),
+      "New chaosnet owner must not be zero address"
+    );
+    _transferChaosnetOwner(newChaosnetOwner);
+  }
+
+  function _transferChaosnetOwner(address newChaosnetOwner) internal {
+    address oldChaosnetOwner = chaosnetOwner;
+    chaosnetOwner = newChaosnetOwner;
+    emit ChaosnetOwnerRoleTransferred(oldChaosnetOwner, newChaosnetOwner);
+  }
+}

contracts/SortitionPool.sol

@@ -8,12 +8,19 @@ import "@openzeppelin/contracts/access/Ownable.sol";
 import "./RNG.sol";
 import "./SortitionTree.sol";
 import "./Rewards.sol";
+import "./Chaosnet.sol";
 
 /// @title Sortition Pool
 /// @notice A logarithmic data structure used to store the pool of eligible
 /// operators weighted by their stakes. It allows to select a group of operators
 /// based on the provided pseudo-random seed.
-contract SortitionPool is SortitionTree, Rewards, Ownable, IReceiveApproval {
+contract SortitionPool is
+  SortitionTree,
+  Rewards,
+  Ownable,
+  Chaosnet,
+  IReceiveApproval
+{
   using Branch for uint256;
   using Leaf for uint256;
   using Position for uint256;
@@ -98,7 +105,9 @@ contract SortitionPool is SortitionTree, Rewards, Ownable, IReceiveApproval {
   }
 
   /// @notice Inserts an operator to the pool. Reverts if the operator is
-  /// already present.
+  /// already present. Reverts if the operator is not eligible because of their
+  /// authorized stake. Reverts if the chaosnet is active and the operator is
+  /// not a beta operator.
   /// @dev Can be called only by the contract owner.
   /// @param operator Address of the inserted operator.
   /// @param authorizedStake Inserted operator's authorized stake for the application.
@@ -110,6 +119,10 @@ contract SortitionPool is SortitionTree, Rewards, Ownable, IReceiveApproval {
     uint256 weight = getWeight(authorizedStake);
     require(weight > 0, "Operator not eligible");
 
+    if (isChaosnetActive) {
+      require(isBetaOperator[operator], "Not beta operator for chaosnet");
+    }
+
     _insertOperator(operator, weight);
     uint32 id = getOperatorID(operator);
     Rewards.updateOperatorRewards(id, uint32(weight));