Smart Contract Security

Noderr Protocol implements multiple layers of security to protect user funds and ensure protocol integrity.

Security Architecture

Access Control

All contracts use OpenZeppelin's AccessControlUpgradeable with role-based permissions:

Multi-Signature Requirements

Critical operations require multi-sig approval:

• Contract Upgrades: 3/5 signatures
• Parameter Changes: 2/5 signatures
• Emergency Pause: Any address holding PAUSER_ROLE (granted to GovernanceManager contract at deployment)
• Unpause: 3/5 signatures via MultiSigTimelock

Upgradeability

Contracts use the UUPS (Universal Upgradeable Proxy Standard) pattern:

contract ERC7540VaultBase is
Initializable,
UUPSUpgradeable,
AccessControlUpgradeable,
PausableUpgradeable,
ReentrancyGuardUpgradeable
{
function _authorizeUpgrade(address newImplementation)
internal
override
onlyRole(UPGRADER_ROLE)
{}
}

Security Features

Reentrancy Protection

All external functions that modify state use nonReentrant modifier:

function deposit(uint256 assets, address receiver)
external
nonReentrant
whenNotPaused
returns (uint256 shares)
{
// ...
}

Pausability

Contracts can be paused in emergencies:

function pause() external onlyRole(PAUSER_ROLE) {
_pause();
emit ProtocolPaused(msg.sender, block.timestamp);
}

Input Validation

All user inputs are validated:

function requestDeposit(uint256 assets, address receiver, address owner)
external
returns (uint256 requestId)
{
require(assets >= minDeposit, "Below minimum deposit");
require(assets <= maxDeposit, "Exceeds maximum deposit");
require(receiver != address(0), "Invalid receiver");
require(owner != address(0), "Invalid owner");
// ...
}

Slippage Protection

Vault operations include slippage protection:

function withdraw(
uint256 assets,
address receiver,
address owner,
uint256 maxSharesBurned
) external returns (uint256 shares) {
shares = previewWithdraw(assets);
require(shares <= maxSharesBurned, "Slippage exceeded");
// ...
}

ERC-7540 Security

Async Operation Safety

The ERC-7540 implementation includes:

1. Request Tracking: Each request has unique ID
2. Fulfillment Delay: Minimum 1-hour delay before fulfillment
3. Validator Selection: Chainlink VRF for fair selection
4. Double-Fulfillment Prevention: On-chain tracking

mapping(uint256 => FulfillmentRequest) public fulfillmentRequests;
mapping(bytes32 => bool) public processedRequests;
function fulfillDeposit(uint256 requestId) external onlyRole(FULFILLER_ROLE) {
FulfillmentRequest storage request = fulfillmentRequests[requestId];
require(!request.fulfilled, "Already fulfilled");
require(block.timestamp >= request.requestTime + fulfillmentDelay, "Delay not passed");
// ...
}

Operator Permissions

Users can delegate claim operations to operators:

mapping(address => mapping(address => bool)) public isOperator;
function setOperator(address operator, bool approved) external {
isOperator[msg.sender][operator] = approved;
emit OperatorSet(msg.sender, operator, approved);
}

Audit Status

Testnet (Current)

• Internal security review: ✅ Complete
• Automated testing: ✅ 24/24 tests passing
• Fuzzing: ✅ 10,000+ iterations

Mainnet (Planned)

• Third-party audit: 🔄 Scheduled Q3-Q4 2026
• Bug bounty program: 🔄 Launch with mainnet
• Formal verification: 🔄 Critical functions

Bug Bounty Program

Coming with Mainnet Launch

Security Contacts

• Security Email: [email protected]
• Bug Reports:https://github.com/Noderrxyz/noderr-protocol/security
• Discord: #security-reports channel

Known Limitations

1. Testnet Only: Current deployment is on Base Sepolia testnet
2. Single Admin Key: Testnet uses single admin for convenience (multi-sig for mainnet)
3. No Formal Verification: Planned for mainnet critical paths

Last Updated: December 2025