Ironclad Smart Contract Audits
Don't let a single vulnerability sink your project. We find and fix security flaws before they cost you millions.
In the world of Web3, trust is your most valuable asset. A single exploit can lead to catastrophic financial loss, irreparable reputational damage, and the end of your project. Our AI-augmented smart contract audits provide the certainty you need to launch with confidence. We meticulously analyze your code, identify potential attack vectors, and deliver actionable insights to fortify your decentralized applications against emerging threats. Secure your future, today.
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Why Partner with Errna for Security Audits?
We provide more than a checklist; we deliver a comprehensive security partnership to protect your Web3 venture.
AI-Augmented Analysis
Our proprietary AI tools scan for thousands of known vulnerabilities and complex logical flaws, augmenting our manual analysis to provide deeper, faster, and more comprehensive code coverage than traditional methods alone.
Elite Security Experts
Our audit team consists of seasoned cybersecurity professionals, ethical hackers, and blockchain architects who live and breathe smart contract security. You get unbiased, expert-driven insights, not just automated reports.
Full Lifecycle Partnership
We're not a one-off service. We offer end-to-end support, from pre-launch design consultation and threat modeling to post-deployment monitoring and incident response planning, ensuring your project remains secure as it evolves.
Verifiable Process Maturity
With CMMI Level 5 and ISO 27001 certifications, our audit methodology is built on globally recognized standards for quality, rigor, and repeatability. This ensures every audit is thorough, transparent, and delivers consistent, high-quality results.
Actionable, Clear Reporting
We deliver more than just a list of problems. Our reports provide clear, prioritized vulnerability details, risk assessments, and concrete code recommendations for remediation, empowering your developers to fix issues efficiently.
Accelerated & Secure Launch
Our efficient process and clear guidance help you address security concerns without derailing your timeline. Launch your project faster and with the confidence that comes from a robust, independent security validation.
Investor & User Trust
An audit certificate from a reputable firm like Errna is a powerful signal to your community and investors. It demonstrates your commitment to security and builds the foundational trust necessary for ecosystem growth.
Gas Optimization Insights
Beyond security, our analysis identifies inefficiencies in your code. We provide recommendations to optimize gas consumption, saving you and your users significant transaction costs over the life of the contract.
Dedicated Remediation Support
Our engagement doesn't end with the report. We work directly with your development team, offering consultation and re-testing to ensure all identified vulnerabilities are properly and securely resolved before deployment.
Comprehensive Smart Contract Audit Services
Tailored security assessments for every layer of the decentralized ecosystem.
DeFi Protocol Audits
We conduct deep analysis of lending platforms, DEXs, yield farms, and other complex financial protocols to prevent economic exploits and protect user funds.
- Secure against flash loan attacks and re-entrancy.
- Validate mathematical models and incentive mechanisms.
- Ensure robust oracle integration and price manipulation resistance.
Token Contract Audits (ERC-20, BEP-20)
Ensure your fungible token contract is secure, compliant, and functions as intended, protecting your project's core economic asset from minting flaws or transaction vulnerabilities.
- Verify adherence to established token standards.
- Prevent integer overflow/underflow and access control issues.
- Analyze tokenomics implementation for potential exploits.
Stablecoin Audits
We audit the mechanisms of algorithmic and collateralized stablecoins, ensuring the stability of the peg, the security of reserve management, and the integrity of minting/burning functions.
- Assess resilience against de-pegging scenarios.
- Verify collateralization logic and liquidation processes.
- Secure governance and administrative functions.
Staking & Yield Farming Audits
Secure your staking contracts and yield farming strategies. We verify reward calculation logic, protect against unauthorized withdrawals, and ensure the fairness and reliability of your incentive programs.
- Prevent reward manipulation and unfair distribution.
- Secure withdrawal and deposit functionalities.
- Validate time-lock mechanisms and contract upgradeability.
Decentralized Exchange (DEX) Audits
Our audits for AMMs and order-book DEXs focus on preventing liquidity pool exploits, ensuring fair trade execution, and securing routing and swapping logic against manipulation.
- Analyze vulnerability to impermanent loss exploits.
- Secure swap, mint, and burn functions.
- Verify fee calculation and distribution mechanisms.
NFT Contract Audits (ERC-721, ERC-1155)
Protect your digital collectibles and their communities. We audit NFT contracts for secure minting, ownership integrity, metadata handling, and marketplace compatibility.
- Prevent unauthorized minting and ownership exploits.
- Ensure secure and reliable metadata management (IPFS/Arweave).
- Verify royalty standard implementations (e.g., EIP-2981).
NFT Marketplace Audits
We secure the entire trading lifecycle on your NFT marketplace, from listing and bidding to sales execution, ensuring the safety of user assets and the integrity of transactions.
- Protect against fake bids and signature replay attacks.
- Secure auction mechanisms (English, Dutch, Vickrey).
- Ensure safe handling of escrow and fund transfers.
Blockchain Game & GameFi Audits
Secure your play-to-earn (P2E) economy. We audit in-game asset contracts, reward systems, and economic models to prevent exploits that could destabilize your game's ecosystem.
- Protect in-game currency and item generation.
- Validate randomness for loot boxes and chance-based events.
- Secure bridging contracts for cross-chain gaming assets.
Metaverse & Virtual Real Estate Audits
As digital worlds expand, we secure the foundational contracts governing virtual land, wearables, and in-world economies, ensuring persistent and reliable ownership for users.
- Verify land parcel (ERC-721) ownership and transfer logic.
- Secure governance contracts for DAOs controlling virtual spaces.
- Audit interoperability standards for cross-metaverse assets.
DAO Governance Audits
Ensure the integrity of your decentralized governance. We audit voting mechanisms, proposal execution, and treasury management to prevent malicious takeovers or fund theft.
- Protect against voting manipulation and flash loan governance attacks.
- Verify the security of treasury fund management.
- Ensure proposal lifecycle and execution logic is sound.
Layer 2 & Scaling Solution Audits
We audit rollups (Optimistic, ZK), sidechains, and state channels, focusing on the security of bridges, sequencers, and fraud-proof mechanisms that underpin their efficiency and safety.
- Secure deposit and withdrawal bridges to L1.
- Analyze sequencer logic for censorship resistance.
- Validate the implementation of cryptographic proofs (ZK-SNARKs/STARKs).
Cross-Chain Bridge Audits
Bridges are high-value targets. Our audits focus on the lock/unlock and mint/burn mechanisms, validator security, and message passing protocols to prevent catastrophic cross-chain exploits.
- Verify atomicity of cross-chain transactions.
- Secure validator consensus and signature verification.
- Prevent replay attacks and unauthorized asset minting.
Wallet & Custody Solution Audits
We audit smart contract wallets and custody solutions, focusing on key management, access control, and transaction signing logic to ensure the highest level of asset security.
- Analyze multi-sig and social recovery mechanisms.
- Verify session management and transaction approval flows.
- Assess resistance to phishing and private key exposure.
Enterprise Blockchain Audits
For private and consortium chains (Hyperledger, Corda), we audit chaincode and smart contracts for business logic flaws, access control vulnerabilities, and data privacy issues specific to enterprise use cases.
- Ensure strict enforcement of permissions and roles.
- Validate business logic against operational requirements.
- Protect sensitive data and ensure regulatory compliance.
Pre-Deployment & Upgrade Audits
Whether it's a first-time launch or a critical upgrade to a live protocol, we provide a final, comprehensive security review to catch any last-minute issues before they impact users and assets.
- Review changes between contract versions for new vulnerabilities.
- Validate migration logic and data integrity during upgrades.
- Ensure secure proxy patterns (e.g., UUPS, Transparent) are used correctly.
Our Rigorous Audit Methodology
A systematic, multi-faceted approach to uncover every potential vulnerability.
1. Scoping & Discovery
We begin by understanding your project's architecture, business logic, and specific security concerns. This collaborative phase ensures our audit is precisely tailored to your unique threat model.
2. Automated Analysis
Our proprietary and industry-standard static analysis tools, including our AI-powered scanner, perform an initial sweep of the codebase to identify common vulnerabilities and logical hotspots, flagging areas for deep manual review.
3. Manual Code Review
This is the core of our audit. Our experts meticulously review your code line-by-line, searching for subtle flaws, business logic errors, and economic vulnerabilities that automated tools invariably miss.
4. Vulnerability Reporting
We compile our findings into a comprehensive, confidential report. Each vulnerability is detailed with a severity rating (Critical, High, Medium, Low), potential impact, and clear, actionable recommendations for remediation.
5. Remediation & Re-Audit
We work with your team to ensure they understand and correctly implement the fixes. Once remediation is complete, we perform a re-audit to verify that all identified issues have been resolved effectively.
6. Final Report & Certification
Upon successful remediation, we issue the final, public-facing audit report and a certificate of security compliance. This serves as a powerful testament to your project's commitment to security and user safety.
Proven Expertise in Action
See how our audits have secured innovative projects across the Web3 landscape.
Securing a Multi-Million Dollar Lending Platform
Industry: Decentralized Finance (DeFi)
Client: A rapidly growing DeFi protocol preparing to launch a new version with over $50M in projected initial liquidity.
"Errna's audit was incredibly thorough. They found a critical re-entrancy vector we had completely missed. Their intervention didn't just save us from a potential exploit; it saved the entire project."
- Alex Royce, CTO, YieldForge Finance
The Problem
The client needed to ensure their new, complex lending and borrowing contracts were free of critical vulnerabilities before going live, as any exploit could drain the entire protocol of its funds.
Key Challenges
- Complex interactions between multiple smart contracts.
- Integration with third-party oracles for price feeds.
- Novel tokenomics and reward distribution logic.
- High risk of economic exploits like flash loan attacks.
Our Solution
We conducted a multi-week, in-depth audit combining automated scanning and intensive manual review.
- Mapped all possible execution paths and state changes.
- Identified a critical cross-contract re-entrancy vulnerability in the withdrawal function.
- Recommended implementing the Checks-Effects-Interactions pattern and re-entrancy guards.
- Provided gas optimization suggestions that reduced average transaction costs.
in TVL Secured at Launch
Critical Vulnerability Prevented
Reduction in Gas Costs
Fortifying a High-Volume NFT Marketplace
Industry: NFTs & Digital Collectibles
Client: An established art and gaming NFT marketplace launching a new, gas-efficient minting and auction contract.
"The security of our artists' and collectors' assets is paramount. Errna's team provided the assurance we needed. Their detailed report and clear communication made the remediation process smooth and efficient."
- Jenna Raynor, Founder, MintVerse
The Problem
The client needed to guarantee the fairness and security of their new NFT minting contract, which was expected to handle thousands of transactions per hour during popular drops, and protect their auction house from exploits.
Key Challenges
- Preventing bots from front-running public mints.
- Ensuring true randomness in reveal mechanics.
- Securing the bidding and settlement process in auctions.
- Correct implementation of the EIP-2981 royalty standard.
Our Solution
Our audit focused on both the on-chain contracts and their interaction with off-chain systems.
- Discovered a flaw in signature verification that could allow bid manipulation.
- Recommended improvements to their anti-bot measures and commit-reveal scheme for fair minting.
- Validated the royalty calculation logic to ensure artists were paid correctly.
- Confirmed adherence to the ERC-721 standard for maximum wallet and marketplace compatibility.
NFTs Securely Minted
High-Severity Flaws Fixed
Royalty Standard Compliance
Ensuring Data Integrity for an Enterprise Supply Chain
Industry: Logistics & Supply Chain
Client: A Fortune 500 company implementing a private Hyperledger Fabric network to track high-value goods.
"Errna brought deep enterprise blockchain expertise to the table. They understood our unique challenges around data privacy and access control. Their audit was a critical step in getting internal stakeholder buy-in."
- Marcus Dyer, Head of Innovation, Global Logistics Inc.
The Problem
The client needed to verify that their chaincode correctly enforced complex business rules and access controls, ensuring that sensitive shipping data was only visible to authorized parties in the supply chain.
Key Challenges
- Implementing granular, role-based access control for multiple stakeholders.
- Ensuring the immutability and integrity of shipment tracking data.
- Preventing unauthorized state changes to digital assets representing goods.
- Compliance with data privacy regulations like GDPR.
Our Solution
We performed a comprehensive audit of the client's chaincode and network configuration.
- Identified an access control flaw where a party could potentially view data from a competitor.
- Validated the logic for asset creation, transfer, and custody changes.
- Recommended best practices for private data collections to enhance confidentiality.
- Provided a detailed report that satisfied the client's internal security and compliance teams.
Data Breaches Post-Launch
Major Access Flaws Patched
Internal Compliance Approval
Our Auditing Toolkit & Expertise
Leveraging the best tools and technologies to secure your code.
We are proficient with industry-standard analysis tools including Slither, Mythril, Manticore, Echidna, and our own proprietary AI-driven scanners.
What Our Clients Say
Trust built on tangible results and dedicated partnership.
"The level of detail in Errna's audit report was exceptional. They didn't just find vulnerabilities; they explained the 'why' behind them, which helped our team level up our own security practices. Truly a partner, not just a vendor."
"We were on a tight deadline for our NFT launch. Errna's team was responsive, professional, and delivered their findings ahead of schedule. Their audit gave our community the confidence to participate in our record-breaking mint."
"As a venture capital firm, we require all our portfolio companies to undergo a rigorous smart contract audit. We recommend Errna without hesitation. Their process is thorough and their reputation is impeccable."
"The gas optimization report alone was worth the price of the audit. Errna's suggestions saved our users thousands of dollars in transaction fees within the first week of implementation."
"Their expertise in cross-chain bridge security is second to none. They identified a subtle logical flaw in our validator consensus that could have been disastrous. We are incredibly grateful for their diligence."
"Working with Errna felt like having an extension of our own team. Their auditors were always available on a shared channel to discuss findings and help our developers implement fixes correctly. Fantastic support."
Meet Our Lead Security Auditors
A selection of our elite experts dedicated to safeguarding the decentralized web.
Joseph A.
Expert Cybersecurity & Software Engineering, Lead Auditor
Vikas J.
Certified Expert Ethical Hacker, Enterprise Cloud & SecOps Solutions
Akeel Q.
Manager, Certified Cloud Solutions & AI/ML Specialist
Prachi D.
Manager, Certified Cloud & IoT, AI & Quantum Computing Expert
Flexible Engagement Models
Security partnerships designed to fit your project's needs and budget.
Project-Based Audit
A fixed-scope, fixed-price engagement perfect for pre-launch projects or specific contract releases. Ideal for getting a comprehensive security baseline before deployment.
- Clear deliverables and timeline.
- Includes one round of re-auditing.
- Best for startups and defined project milestones.
Audit Retainer
An ongoing partnership for projects with continuous development and frequent updates. We provide continuous security assurance as your protocol evolves.
- Priority access to our audit team.
- Regular, scheduled audits of new code.
- Ideal for established DeFi protocols and L2s.
Security Advisory
A strategic engagement where our experts act as your dedicated security advisors, providing guidance on architecture, threat modeling, and best practices from the earliest stages of development.
- Proactive security, not just reactive auditing.
- Direct access to our top security architects.
- Maximizes security posture from day one.
Frequently Asked Questions
A smart contract audit is a comprehensive security analysis of a blockchain application's code. Its purpose is to identify vulnerabilities, logical errors, and potential exploits before the code is deployed to the blockchain, where it becomes immutable. It's a critical process to protect user funds and ensure the application behaves as intended.
While your developers are experts in your project's logic, they can develop "tunnel vision" and may overlook subtle flaws. A third-party auditor brings a fresh, unbiased perspective and specialized expertise in attack vectors and security best practices that internal teams may not possess. It also provides external validation, which is crucial for building trust with users and investors.
The cost of an audit depends on the complexity and length of the codebase. A simple ERC-20 token will cost less to audit than a complex DeFi lending protocol. We provide a custom quote after an initial review of your code. While it's a significant investment, the cost is minimal compared to the potential loss from a single exploit, which could be in the millions or even billions of dollars.
The timeline varies with code complexity, but a typical audit takes between 1 to 4 weeks. This includes the initial analysis, report generation, and time for your team to remediate the findings, followed by our re-audit. We work with you to establish a timeline that fits your launch schedule without compromising on thoroughness.
You will receive a detailed private report with all our findings, severity levels, and remediation advice. After you've fixed the issues, we conduct a re-audit. Once all critical and high-severity issues are resolved, we issue a final, public-facing report and a certificate of completion that you can share with your community to demonstrate your commitment to security.
We use both. Our process begins with advanced automated and AI-powered tools to catch common vulnerabilities and provide broad coverage. However, the most critical part of our audit is the intensive manual review by our expert security engineers, who analyze business logic and identify complex vulnerabilities that automated tools cannot detect.
Ready to Secure Your Project?
Don't leave your success to chance. An exploit is not a matter of 'if', but 'when'. Let our experts provide the certainty you need to build, launch, and scale with confidence.
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