feat: slashers

Author: stevennevins

src/slashers/Slasher.sol

@@ -0,0 +1,39 @@
+// SPDX-License-Identifier: BUSL-1.1
+pragma solidity ^0.8.12;
+
+import {IStrategy} from "eigenlayer-contracts/src/contracts/interfaces/IStrategy.sol";
+import {SlasherBase} from "./SlasherBase.sol";
+
+contract Slasher is SlasherBase {
+    uint256 public nextRequestId;
+
+    event Slashed(
+        uint256 indexed requestId,
+        address indexed operator,
+        uint32 indexed operatorSetId,
+        uint256 wadToSlash,
+        string description
+    );
+
+    function initialize(address _serviceManager) public initializer {
+        __SlasherBase_init(_serviceManager);
+    }
+
+    function fulfillSlashingRequest(
+        address operator,
+        uint32 operatorSetId,
+        IStrategy[] memory strategies,
+        uint256 wadToSlash,
+        string memory description
+    ) external virtual {
+        uint256 requestId = nextRequestId++;
+        _fulfillSlashingRequest(
+            operator,
+            operatorSetId,
+            strategies,
+            wadToSlash,
+            description
+        );
+        emit Slashed(requestId, operator, operatorSetId, wadToSlash, description);
+    }
+}

src/slashers/SimpleSlasher.sol renamed to src/slashers/SlasherBase.sol

@@ -7,18 +7,33 @@ import {SlasherStorage} from "./SlasherStorage.sol";
 import {IAllocationManagerTypes} from "eigenlayer-contracts/src/contracts/interfaces/IAllocationManager.sol";
 import {IStrategy} from "eigenlayer-contracts/src/contracts/interfaces/IStrategy.sol";
 
-contract SimpleSlasher is Initializable, SlasherStorage {
-    function initialize(address _serviceManager) public initializer {
+abstract contract SlasherBase is Initializable, SlasherStorage {
+    enum SlashingStatus {
+        Null,
+        Requested,
+        Completed,
+        Cancelled
+    }
+
+    event OperatorSlashed(
+        address indexed operator,
+        uint32 indexed operatorSetId,
+        IStrategy[] strategies,
+        uint256 wadToSlash,
+        string description
+    );
+
+    function __SlasherBase_init(address _serviceManager) internal onlyInitializing {
         serviceManager = _serviceManager;
     }
 
-    function slashOperator(
+    function _fulfillSlashingRequest(
         address operator,
         uint32 operatorSetId,
         IStrategy[] memory strategies,
         uint256 wadToSlash,
         string memory description
-    ) external {
+    ) internal virtual {
 
         IAllocationManagerTypes.SlashingParams memory params = IAllocationManagerTypes.SlashingParams({
             operator: operator,
@@ -28,6 +43,12 @@ contract SimpleSlasher is Initializable, SlasherStorage {
             description: description
         });
 
+        emit OperatorSlashed(operator, operatorSetId, strategies, wadToSlash, description);
+
         IServiceManager(serviceManager).slashOperator(params);
     }
 }
+
+
+
+

src/slashers/VetoableSlasher.sol

@@ -0,0 +1,107 @@
+// SPDX-License-Identifier: BUSL-1.1
+pragma solidity ^0.8.12;
+
+import {IStrategy} from "eigenlayer-contracts/src/contracts/interfaces/IStrategy.sol";
+import {SlasherBase} from "./SlasherBase.sol";
+
+contract VetoableSlashing is SlasherBase {
+    struct SlashingRequest {
+        address operator;
+        uint32 operatorSetId;
+        IStrategy[] strategies;
+        uint256 wadToSlash;
+        string description;
+        uint256 requestTimestamp;
+        SlashingStatus status;
+    }
+
+    uint256 public constant VETO_PERIOD = 3 days;
+    address public vetoCommittee;
+    uint256 public nextRequestId;
+    mapping(uint256 => SlashingRequest) public slashingRequests;
+
+    event SlashingRequested(
+        uint256 indexed requestId,
+        address indexed operator,
+        uint32 indexed operatorSetId,
+        uint256 wadToSlash,
+        string description
+    );
+
+    event SlashingRequestCancelled(uint256 indexed requestId);
+
+    modifier onlyVetoCommittee() {
+        require(msg.sender == vetoCommittee, "VetoableSlashing: caller is not the veto committee");
+        _;
+    }
+
+    function initialize(address _serviceManager, address _vetoCommittee) external virtual initializer {
+        __SlasherBase_init(_serviceManager);
+        vetoCommittee = _vetoCommittee;
+    }
+
+    function queueSlashingRequest(
+        address operator,
+        uint32 operatorSetId,
+        IStrategy[] memory strategies,
+        uint256 wadToSlash,
+        string memory description
+    ) external virtual {
+        _queueSlashingRequest(operator, operatorSetId, strategies, wadToSlash, description);
+    }
+
+    function cancelSlashingRequest(uint256 requestId) external virtual onlyVetoCommittee {
+        require(
+            block.timestamp < slashingRequests[requestId].requestTimestamp + VETO_PERIOD,
+            "VetoableSlashing: veto period has passed"
+        );
+        require(slashingRequests[requestId].status == SlashingStatus.Requested, "VetoableSlashing: request is not in Requested status");
+
+        _cancelSlashingRequest(requestId);
+    }
+
+    function fulfillSlashingRequest(uint256 requestId) external virtual {
+        SlashingRequest storage request = slashingRequests[requestId];
+        require(
+            block.timestamp >= request.requestTimestamp + VETO_PERIOD,
+            "VetoableSlashing: veto period has not passed"
+        );
+        require(request.status == SlashingStatus.Requested, "VetoableSlashing: request has been cancelled");
+
+        _fulfillSlashingRequest(
+            request.operator,
+            request.operatorSetId,
+            request.strategies,
+            request.wadToSlash,
+            request.description
+        );
+
+        delete slashingRequests[requestId];
+    }
+
+    function _queueSlashingRequest(
+        address operator,
+        uint32 operatorSetId,
+        IStrategy[] memory strategies,
+        uint256 wadToSlash,
+        string memory description
+    ) internal virtual {
+        uint256 requestId = nextRequestId++;
+        slashingRequests[requestId] = SlashingRequest({
+            operator: operator,
+            operatorSetId: operatorSetId,
+            strategies: strategies,
+            wadToSlash: wadToSlash,
+            description: description,
+            requestTimestamp: block.timestamp,
+            status: SlashingStatus.Requested
+        });
+
+        emit SlashingRequested(requestId, operator, operatorSetId, wadToSlash, description);
+    }
+
+    function _cancelSlashingRequest(uint256 requestId) internal virtual {
+        slashingRequests[requestId].status = SlashingStatus.Cancelled;
+        emit SlashingRequestCancelled(requestId);
+    }
+}