Security Audits

KhipuVault undergoes regular security audits to ensure the safety of your Bitcoin. This page contains all audit reports, findings, and remediation status.

Audit Overview

Current Audit Status

✅ Production Contracts (Mezo Testnet)

All deployed contracts have passed automated security scans:

Slither Audit

Audit Date: January 2025 Tool: Slither Static Analyzer Version: 0.10.0 Contracts Analyzed: 5 core contracts

Summary

Slither performed comprehensive static analysis of our smart contracts, checking for:

• Reentrancy vulnerabilities
• Access control issues
• Arithmetic errors
• Gas optimization opportunities
• Best practice violations

Key Findings

Total Issues: 12

• 🟢 Informational: 10
• 🟡 Low: 2
• 🟠 Medium: 0
• 🔴 High: 0
• ⚫ Critical: 0

Detailed Results

Informational Issues (10)

These are code quality and gas optimization suggestions:

1. Solidity Version Pragma (4 instances)

   • Location: All contract files
   • Finding: Non-locked pragma version
   • Recommendation: Use fixed pragma for production
   • Status: ✅ Fixed - Locked to ^0.8.27

2. Event Missing Indexed Fields (3 instances)

   • Location: IndividualPool.sol, CooperativePool.sol
   • Finding: Events could benefit from indexed parameters
   • Recommendation: Add indexed to address and uint256 fields
   • Status: ✅ Fixed

3. Public Functions Could Be External (2 instances)

   • Location: Helper functions in utility contracts
   • Finding: Gas optimization opportunity
   • Recommendation: Change visibility to external
   • Status: ✅ Fixed

4. Missing NatSpec Documentation (1 instance)

   • Location: Internal helper functions
   • Finding: Incomplete documentation
   • Recommendation: Add NatSpec comments
   • Status: ✅ Fixed

Low Severity Issues (2)

1. Reentrancy in Withdraw Function

   • Contract: IndividualPool.sol
   • Function: withdraw(uint256 amount)
   • Finding: External call before state update (lines 234-236)
   • Severity: Low (protected by OpenZeppelin ReentrancyGuard)
   • Recommendation: Move state update before external call
   • Status: ✅ Fixed - Reordered operations in commit d3733c6

2. Unchecked Low-Level Call

   • Contract: MezoIntegration.sol
   • Function: _processYield()
   • Finding: Low-level call without success check
   • Severity: Low (internal function with validation)
   • Recommendation: Add explicit success validation
   • Status: ✅ Fixed - Added require statement

Recommendations Implemented

All Slither recommendations have been addressed:

✅ Fixed pragma versions to ^0.8.27 ✅ Added indexed parameters to all major events ✅ Optimized function visibility for gas savings ✅ Completed NatSpec documentation across all contracts ✅ Reordered state updates to follow checks-effects-interactions pattern ✅ Added explicit validations for low-level calls

Full Report

# View the complete Slither report
git clone https://github.com/khipuvault/khipuvault
cd packages/contracts
slither . --config-file slither.config.json

Aderyn Audit

Audit Date: January 2025 Tool: Aderyn Static Analyzer Version: 0.3.0 Contracts Analyzed: 5 core contracts

Summary

Aderyn performed Rust-based static analysis focusing on:

• Common vulnerability patterns
• Solidity best practices
• Gas optimization
• Code quality metrics

Key Findings

Total Issues: 8

• 🟢 Informational: 7
• 🟡 Low: 1
• 🟠 Medium: 0
• 🔴 High: 0
• ⚫ Critical: 0

Detailed Results

Informational Issues (7)

1. Floating Pragma (5 instances)

   • Status: ✅ Fixed - Locked pragma versions

2. Missing Zero Address Checks (1 instance)

   • Contract: Constructor initialization
   • Recommendation: Add zero address validation
   • Status: ✅ Fixed - Added validation

3. Large Literal Values (1 instance)

   • Finding: Hardcoded large numbers reduce readability
   • Recommendation: Use constants with descriptive names
   • Status: ✅ Fixed - Defined constants

Low Severity Issues (1)

1. Centralization Risk
   • Contract: YieldAggregator.sol
   • Finding: Single admin address controls yield distribution
   • Severity: Low
   • Recommendation: Implement multi-sig or timelock
   • Status: 🔄 Planned - Multi-sig implementation in Q1 2026

Full Report

# Generate Aderyn report
cd packages/contracts
aderyn . --output aderyn-report.md

Manual Code Review (In Progress)

Status: 🔄 In Progress Expected Completion: February 2025 Auditor: TBD

Scope

The manual audit will cover:

• Smart Contract Review: Deep dive into contract logic and edge cases
• Integration Testing: Cross-contract interaction analysis
• Economic Security: Game theory and incentive alignment
• Upgrade Path Review: Future upgradeability considerations

Timeline

• Week 1-2: Contract logic review
• Week 3-4: Integration and edge case testing
• Week 5: Report preparation
• Week 6: Remediation and re-audit

Historical Audits

Pre-Production Reviews (2024)

Before mainnet launch, we conducted internal security reviews:

• December 2024: Initial contract design review
• December 2024: Integration testing and edge case analysis
• January 2025: Pre-deployment security checklist

All findings were addressed before testnet deployment.

Continuous Security

Automated Scanning

Our CI/CD pipeline includes automated security checks:

# GitHub Actions: .github/workflows/security.yml
- Slither static analysis on every PR
- Aderyn scan on main branch commits
- Gas optimization reports
- Coverage requirement: 80% minimum

Bug Bounty Integration

Security researchers can earn rewards for finding vulnerabilities not caught in audits.

View Bug Bounty Program

Audit Methodology

Our audit process follows industry standards:

1. Automated Analysis

• Static analysis with Slither and Aderyn
• Gas profiling with Foundry
• Coverage analysis with lcov

2. Manual Review

• Line-by-line code review
• Architecture and design analysis
• Integration testing
• Economic attack vector analysis

3. Testing

• Unit tests (100% coverage target)
• Integration tests
• Fuzzing with Echidna
• Formal verification (planned)

4. Remediation

• Fix all critical and high severity issues
• Address medium severity findings
• Document accepted risks for low severity items
• Re-audit after fixes

Known Limitations

We maintain transparency about current limitations:

Testnet Status

Centralization Points

• Yield Distribution: Currently controlled by admin multi-sig
• Contract Upgrades: Timelock + multi-sig required (planned)
• Emergency Pause: Admin can pause contracts (required for security)

External Dependencies

Our contracts depend on:

• OpenZeppelin libraries (v5.0.0) - Audited
• Mezo blockchain infrastructure - Third-party
• Oracle systems for yield calculation - In development

Reporting Process

Found an issue during your own review? Here's how to report it:

For Security Vulnerabilities

🔒 Private Disclosure: security@khipuvault.com

Include:

• Vulnerability description
• Proof of concept
• Suggested fix
• Impact assessment

For Code Quality Issues

🐛 Public Issue: GitHub Issues

Use the "Security Review" template.

Audit Transparency

We commit to full transparency:

✅ All audit reports are public and published on this page ✅ Source code is open-source on GitHub ✅ Contracts are verified on Mezo block explorer ✅ Changes are tracked in our public changelog

Future Audits

Planned Reviews

• Q1 2026: Third-party professional audit (budget: $50k)
• Q2 2026: Economic security analysis
• Q3 2026: Formal verification with Certora
• Q4 2026: Pre-mainnet comprehensive audit

Ongoing Commitment

• Quarterly automated scans
• Annual professional audits
• Continuous bug bounty program
• Regular security updates

Questions?

Have questions about our audit process?

• 📧 Email: security@khipuvault.com
• 💬 Discord: #security channel
• 📖 FAQ: Security FAQ

Thank you for helping us maintain the highest security standards.