AI-Augmented DeFi Security Audits That Prevent Catastrophic Exploits
Don't become another headline. Our rigorous, enterprise-grade smart contract audits secure your protocol, protect your users, and build unwavering investor trust.
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Why DeFi Security is Non-Negotiable
In the high-stakes world of Decentralized Finance, your smart contract is your vault, your rulebook, and your reputation all rolled into one. A single vulnerability can lead to millions in lost funds, irreparable damage to user trust, and the end of your project. Proactive, expert security auditing isn't just a best practice; it's a fundamental requirement for survival and success in the Web3 ecosystem.
Our Comprehensive DeFi Security Audit Services
We go beyond simple line-by-line code checks. Our multi-faceted approach analyzes your entire DeFi ecosystem, from the core logic to economic modeling, ensuring robust security at every layer.
Smart Contract Code Audit
A meticulous, line-by-line review of your Solidity, Rust, or Vyper code to identify common and complex vulnerabilities.
- Detects issues like re-entrancy, integer overflows, and access control flaws.
- Ensures adherence to the latest security best practices and standards.
- Provides actionable code-level recommendations for remediation.
Tokenomics & Economic Model Audit
Analysis of your protocol's economic incentives and mechanisms to identify potential manipulation vectors.
- Stress-tests for vulnerabilities to flash loan attacks and oracle manipulation.
- Evaluates the sustainability and fairness of your token distribution and reward models.
- Protects against economic exploits that drain protocol value.
Gas Optimization Analysis
Identifies inefficiencies in your smart contracts to reduce transaction costs for your users, enhancing usability.
- Lowers the barrier to entry and interaction with your dApp.
- Improves your protocol's competitiveness on the blockchain.
- Provides code refactoring suggestions for optimal gas usage.
Access Control & Permissions Audit
Verifies that your protocol's administrative functions and privileged roles are securely implemented and managed.
- Prevents unauthorized access to critical functions like pausing contracts or minting tokens.
- Ensures a robust and secure governance structure.
- Checks for centralization risks that could compromise decentralization.
Upgradeability & Proxy Pattern Review
Examines your proxy contract implementation to ensure that your protocol can be upgraded securely without introducing new risks.
- Validates the logic of your upgrade mechanism to prevent hijacking.
- Checks for storage collisions and initialization flaws.
- Ensures smooth and secure future development of your protocol.
Cross-Chain Bridge Security Audit
A specialized audit focusing on the unique challenges of interoperability protocols, a prime target for attackers.
- Analyzes validator security, message passing, and asset locking mechanisms.
- Protects against re-entrancy and replay attacks across chains.
- Ensures the integrity of assets as they move between blockchains.
Oracle & Data Feed Integration Audit
Secures your protocol's reliance on external data feeds, a critical point of failure for many DeFi applications.
- Prevents price manipulation through oracle attacks.
- Verifies fallback mechanisms and data source decentralization.
- Ensures the reliability and integrity of the data your protocol depends on.
Front-Running & MEV Vulnerability Testing
Identifies opportunities for Maximal Extractable Value (MEV) that can be exploited at the expense of your users.
- Analyzes transaction ordering and potential for sandwich attacks.
- Recommends mitigation strategies to protect users from value extraction.
- Ensures a fairer and more equitable experience for your community.
NFT & Marketplace Security Audit
Tailored security analysis for ERC-721/1155 contracts and the marketplaces they trade on.
- Ensures compliance with standards and prevents unexpected minting behaviors.
- Secures auction and bidding logic against exploits.
- Protects metadata integrity and ownership records.
DAO Governance & Voting Security
Audits the smart contracts that power your Decentralized Autonomous Organization to ensure fair and secure governance.
- Protects against malicious proposal execution and voting manipulation.
- Verifies the logic of your treasury management and delegation contracts.
- Ensures the integrity of your community-led governance process.
Pre-Launch Security Audit
A comprehensive audit conducted before your protocol goes live, providing the critical green light for a safe deployment.
- Provides the highest level of assurance for your initial launch.
- Builds immediate trust with your early users and investors.
- Includes a final check of deployment scripts and initial state.
Post-Launch & Live Monitoring
Ongoing security services after deployment, because security is a process, not a one-time event.
- Continuous monitoring of on-chain activity for threats.
- Rapid incident response planning and support.
- Keeps your protocol secure as the threat landscape evolves.
Delta & Incremental Audit
An efficient audit process for protocol upgrades and new feature additions, focusing only on the code that has changed.
- Saves time and money compared to a full re-audit.
- Enables agile development cycles without compromising security.
- Ensures new features integrate securely with the existing codebase.
Formal Verification
Utilizes mathematical proofs to verify that your smart contract's logic behaves exactly as intended under all possible conditions.
- Provides the highest possible level of security assurance for critical components.
- Eliminates entire classes of bugs and vulnerabilities.
- Ideal for core financial primitives and high-value contracts.
Incident Response & Post-Mortem
Expert support in the unfortunate event of a security breach to mitigate damage and prevent future occurrences.
- Helps analyze the attack vector and secure remaining funds.
- Provides a detailed post-mortem analysis for your community.
- Assists in developing remediation plans and stronger security controls.
Why Partner with Errna for Your Audit?
Choosing an auditor is a critical decision. We combine deep technical expertise with a business-centric, partnership approach to provide audits that deliver real, measurable value and peace of mind.
AI-Powered Threat Detection
Our proprietary AI tools scan for complex, non-obvious vulnerabilities and logical flaws that manual analysis can miss, providing an extra layer of deep, intelligent security analysis.
A Partner in Remediation
We don't just deliver a report and disappear. Our experts work directly with your development team to ensure vulnerabilities are understood and correctly patched, including re-testing.
20+ Years of Security DNA
Founded in 2003, we bring decades of enterprise-grade software security experience to the Web3 space. Our CMMI Level 5 processes ensure a level of rigor and maturity others can't match.
Investor-Grade Reporting
Our audit reports are clear, comprehensive, and respected by top V.C.s and launchpads. A security audit certificate from Errna is a powerful signal of trust and credibility.
Beyond Code, We Audit Systems
We understand that security isn't just about code. We analyze your entire system, including tokenomics, governance, and external dependencies, for a holistic risk assessment.
Full-Stack Development Context
As a full-service development company, our auditors understand the practicalities of building and scaling complex applications. Our recommendations are pragmatic and actionable, not just theoretical.
Agile & Efficient Process
We integrate with your development workflow, providing rapid feedback and clear communication to keep your roadmap on track without sacrificing security for speed.
Dedicated Support
You get a dedicated project manager and direct access to our security engineers, ensuring your questions are answered promptly and the audit process is smooth and transparent.
End-to-End Partnership
An audit is just the beginning. We offer a full suite of blockchain services, from development to ongoing security retainers, ready to support your project's long-term growth.
Our Battle-Tested Audit Methodology
Our process is designed for maximum transparency and effectiveness, combining automated tools with deep manual analysis to uncover every potential threat.
1. Scoping & Reconnaissance
We begin by understanding your project's architecture, business logic, and specific security concerns. Our team reviews your documentation and establishes clear goals for the audit.
2. Automated Analysis
We leverage a suite of industry-leading static and dynamic analysis tools, including our proprietary AI scanners, to perform an initial sweep and identify low-hanging fruit and common vulnerability patterns.
3. Manual Code Review
This is the core of our audit. Our expert security engineers conduct a meticulous line-by-line review of your codebase, searching for subtle logic flaws, economic vulnerabilities, and architectural issues that automated tools cannot find.
4. Reporting & Collaboration
We compile our findings into a clear, detailed report, categorizing vulnerabilities by severity and providing actionable recommendations. We then schedule a call with your team to discuss the findings and plan remediation.
5. Remediation & Re-Testing
After your team implements the fixes, we perform a re-audit of the affected code to verify that the vulnerabilities have been successfully resolved and no new issues have been introduced.
6. Final Report & Certification
Once all critical issues are addressed, we issue the final, public-facing audit report and a certificate of security compliance, which you can share with your community and investors to build trust.
Success Stories: Audits That Made a Difference
Our audits have protected millions in assets and helped projects launch with the confidence they need to succeed. Here are a few examples.
Preventing a $10M Exploit in a Lending Protocol
Industry: Decentralized Finance (DeFi)"Errna's team didn't just find a bug; they prevented a catastrophe. Their deep dive into our economic model was beyond what we expected. They are now our go-to security partners for all future development."
The Problem
LendFi, an emerging lending protocol, was preparing for its mainnet launch with over $10M in initial liquidity. They needed a final, comprehensive security audit to ensure user funds would be safe from day one and to secure the confidence of their institutional liquidity providers.
Key Challenges
- Complex interest rate calculation model.
- Integration with multiple, volatile asset oracles.
- Highly recursive logic for collateralized debt positions.
- Tight deadline before the scheduled public launch.
Our Solution
Errna conducted an intensive two-week audit combining AI-powered analysis with deep manual review by two senior security engineers.
- Identified a critical re-entrancy vulnerability in the withdrawal function that was masked by a complex series of contract calls.
- Discovered a vector for price oracle manipulation during periods of high network congestion.
- Modeled a flash loan attack scenario that could drain a significant portion of the protocol's reserves.
- Provided optimized code snippets and worked directly with LendFi's developers for rapid remediation.
Securing a High-Profile NFT Marketplace Launch
Industry: NFTs & Digital Collectibles"The NFT space moves incredibly fast, and security can be an afterthought. Errna's audit was thorough, professional, and gave our community the confidence to participate in our launch. We had a flawless mint thanks to their work."
The Problem
ArtBlock Creators was launching a novel NFT marketplace with a unique, generative art minting function. They needed to ensure their ERC-721 contract and auction logic were airtight to prevent exploits that could devalue the collection or allow unfair minting practices.
Key Challenges
- Complex on-chain random number generation for art traits.
- A tiered whitelist and public sale minting structure.
- Gas-intensive minting process that needed optimization.
- Protection against bots during the public sale.
Our Solution
Our team performed a targeted audit on the NFT contract, marketplace logic, and front-end integration.
- Uncovered a flaw in the whitelist logic that would have allowed non-whitelisted addresses to mint early.
- Recommended significant gas optimizations that saved users an average of 30% on minting fees.
- Strengthened the randomness function to make it more resistant to block hash manipulation.
- Provided best-practice recommendations for front-end security to mitigate bot activity.
Technical Due Diligence for a $5M Seed Investment
Industry: Venture Capital"Errna's audit report was the most crucial piece of our due diligence process. Their findings—both positive and negative—were clear, objective, and gave us the technical conviction needed to make our investment decision. They are an invaluable resource for any Web3 investor."
The Problem
Crypto Capital Ventures was considering a $5M seed investment in a promising new cross-chain messaging protocol. Before committing capital, they needed an independent, expert assessment of the protocol's security, architecture, and overall technical viability.
Key Challenges
- Highly experimental and complex codebase.
- Assessing the security of the off-chain validator network.
- Evaluating the long-term scalability of the architecture.
- Translating deep technical risks into a clear business impact report for V.C. partners.
Our Solution
We acted as the V.C.'s technical partner, performing a comprehensive audit that went beyond standard vulnerability checks.
- Conducted a full smart contract audit, identifying several medium-risk issues.
- Performed an architectural review, highlighting potential centralization risks in their validator design.
- Assessed the development team's coding practices and documentation quality.
- Delivered a two-part report: a detailed technical analysis for their dev team and an executive summary for the partners, outlining risks in clear, investment-focused language.
Technology & Tools We Use
We employ a sophisticated arsenal of industry-standard and proprietary tools to ensure the most comprehensive audit coverage.
What Our Clients Say
Our success is measured by the trust and confidence we build with our partners.
"The audit process was seamless and incredibly insightful. The Errna team felt like an extension of our own, providing clear, actionable feedback that significantly hardened our protocol before launch."
"As a V.C., we rely on Errna for technical due diligence. Their reports are the gold standard—thorough, objective, and crucial for assessing risk in potential investments. They've saved us from more than one bad bet."
"We engaged Errna for a pre-launch audit of our new cross-chain bridge. Their expertise in this specific, high-risk area was evident. They found a subtle but critical flaw that other firms might have missed."
"The AI-augmented analysis was a game-changer. It surfaced potential edge cases in our tokenomics model that we hadn't considered. This level of depth provides true peace of mind."
"Their remediation support is what sets them apart. They didn't just hand us a list of problems; they patiently worked with our junior developers to ensure every patch was implemented correctly."
"Fast, professional, and incredibly thorough. We were on a tight timeline for our GameFi launch, and Errna delivered a comprehensive audit without cutting any corners. Highly recommended."
Flexible Engagement Models
We offer a range of engagement models designed to meet your specific needs, budget, and development lifecycle.
One-Time Project Audit
A comprehensive, end-to-end security audit for your protocol before a major launch or upgrade. This is our most popular offering, providing a complete security snapshot and a public report to build community trust.
Continuous Security Retainer
An ongoing partnership for projects that are constantly evolving. We provide continuous monitoring, regular delta audits for new code, and on-demand security consultation, acting as your dedicated security team.
Pre-Launch Security Package
A bundled service for startups that includes an initial architectural review, a full pre-launch audit, and post-launch support. This package is designed to provide maximum security and confidence for new projects entering the market.
Audit Service Comparison
See how a professional, third-party audit from Errna provides a level of assurance that internal reviews and basic scanners simply cannot match.
| Feature | Internal Review | Automated Scanner | Errna Professional Audit |
|---|---|---|---|
| Unbiased, Third-Party Perspective | |||
| Detection of Common Vulnerabilities | |||
| Logic & Business Rule Flaw Detection | |||
| Economic Model & Tokenomics Analysis | |||
| AI-Augmented Threat Analysis | |||
| Expert Remediation Guidance | |||
| Investor-Grade Public Report |
Frequently Asked Questions
The cost of an audit depends on the complexity and lines of code in your smart contracts. A simple token contract may cost a few thousand dollars, while a complex DeFi protocol can range from $20,000 to over $100,000. We provide a custom quote after an initial review of your project. Remember, the cost of an audit is an investment that is far less than the potential cost of an exploit.
The timeline typically ranges from one to four weeks, depending on the project's scope. We work with you to establish a timeline that aligns with your development roadmap. We can often expedite audits for urgent needs.
To get started, we typically need access to your code repository (e.g., GitHub), any existing technical documentation, and a clear understanding of the project's intended functionality. The more information you can provide, the more effective our audit will be.
Yes. While we have deep expertise in Solidity and the EVM, our team is also proficient in auditing smart contracts written in Rust for chains like Solana and Polkadot, as well as other emerging blockchain ecosystems. Our fundamental security principles apply across all platforms.
If we discover a critical vulnerability, we notify you immediately through a secure channel before it's included in the formal report. We believe in responsible disclosure and will work closely with your team to understand the issue and begin remediation as quickly as possible.
No. Security is an ongoing process, not a one-time fix. An audit provides a critical snapshot of your code's security at a specific point in time. Any future changes or upgrades to your code should be audited as well. This is why we recommend our Continuous Security Retainer model for active projects.
Ready to Secure Your Place in the Future of Finance?
Don't leave your project's fate to chance. Schedule a free, no-obligation consultation with our security experts to discuss your needs and get a custom audit proposal.
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