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Submission Details
Severity: medium
Invalid

test/ethStaking/wl-operator-controller.test.ts

kp8877

Detailed Solutions for WLOperatorController Vulnerabilities and Improvements

1. Access Control

Implementation:

  1. Define roles: Create a Roles contract or use OpenZeppelin's AccessControl library to define roles like OperatorOwner, KeyValidationOracle, and BeaconOracle.

  2. Assign roles: Assign these roles to appropriate accounts during deployment or using a governance mechanism.

  3. Use modifiers: Apply modifiers like onlyOperatorOwner or onlyKeyValidationOracle to functions requiring specific roles.

Example using OpenZeppelin's AccessControl:

Solidity

import "@openzeppelin/contracts/access/AccessControl.sol";
​
contract WLOperatorController is AccessControl {
bytes32 public constant OPERATOR_OWNER_ROLE = keccak256("OPERATOR_OWNER_ROLE");
bytes32 public constant KEY_VALIDATION_ORACLE_ROLE = keccak256("KEY_VALIDATION_ORACLE_ROLE");
bytes32 public constant BEACON_ORACLE_ROLE = keccak256("BEACON_ORACLE_ROLE");
​
constructor() {
_grantRole(DEFAULT_ADMIN_ROLE, msg.sender);
_grantRole(OPERATOR_OWNER_ROLE, msg.sender);
}
​
modifier onlyOperatorOwner() {
require(hasRole(OPERATOR_OWNER_ROLE, msg.sender), "Caller is not operator owner");
_;
}
​
// ...
}
​

2. Reentrancy

Implementation:

  1. Use OpenZeppelin's ReentrancyGuard contract or implement a reentrancy guard pattern manually.

Example using ReentrancyGuard:

Solidity

import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
​
contract WLOperatorController is ReentrancyGuard {
// ...
}
​

3. Gas Optimization

Implementation:

  1. Store active validators per operator in a mapping.

  2. Update this mapping efficiently when operators are added, removed, or their validators are reported as stopped.

Example:

Solidity

mapping(uint256 => address[]) public activeValidators;
​
function reportStoppedValidators(uint256[] memory operatorIds, uint256[] memory stoppedValidatorCounts) public onlyBeaconOracle {
// ...
for (uint256 i = 0; i < operatorIds.length; i++) {
uint256 operatorId = operatorIds[i];
uint256 stoppedCount = stoppedValidatorCounts[i];
// ...
activeValidators[operatorId] = activeValidators[operatorId][stoppedCount:];
}
// ...
}
​

4. Event Emission

Implementation:

  1. Emit events for significant state changes like OperatorAdded, OperatorRemoved, ValidatorsAssigned, StoppedValidatorsReported, etc.

Example:

Solidity

event OperatorAdded(uint256 operatorId, address owner);
​
function addOperator(string memory name) public onlyOperatorOwner {
// ...
emit OperatorAdded(operatorId, msg.sender);
}
​

5. Error Handling

Implementation:

  1. Provide more informative error messages for unexpected conditions.

  2. Use custom error types or revert() with a string message.

Example:

Solidity

error InvalidOperatorId(uint256 operatorId);
​
function getNextValidators(uint256 operatorId) public view returns (uint256[] memory, uint256[] memory, uint256, bytes memory) {
// ...
if (!operators.contains(operatorId)) {
revert InvalidOperatorId(operatorId);
}
// ...
}
​

Additional Improvements

  • Documentation: Add comments and docstrings to explain the purpose of functions, variables, and contracts.

  • Testing: Write unit tests for edge cases and error handling scenarios.

  • Security Audits: Consider conducting formal security audits to identify potential vulnerabilities.

  • Maintainability: Follow coding conventions and best practices to improve code readability and maintainability.

By implementing these improvements, the WLOperatorController contract can become more secure, efficient, and user-friendly.

Updates

Lead Judging Commences

inallhonesty Lead Judge about 1 year ago
Submission Judgement Published
Invalidated
Reason: Lack of quality

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