Smart Contract Audit Services: Fortify Your Code. Secure Your Future.
Don't let a single vulnerability drain your treasury. Our AI-enhanced, expert-led audits identify and neutralize threats before they go live.
Secure Your Project NowTrusted by Innovative Startups and Global Enterprises
Why Partner with Errna for Smart Contract Audits?
AI-Augmented Precision
We leverage advanced AI and machine learning tools to run exhaustive automated analyses, detecting subtle anti-patterns and potential vulnerabilities that manual reviews can miss. This tech-first layer ensures comprehensive initial coverage.
Expert-Led Manual Analysis
Technology is only half the equation. Our seasoned security engineers, with deep expertise in adversarial tactics, manually review every line of code to understand business logic, identify complex exploits, and eliminate false positives.
Full-Stack Context
A contract doesn't exist in a vacuum. Our auditors understand the entire Web3 stack, from front-end interactions to oracle data feeds and cross-chain dependencies, allowing us to identify systemic risks beyond the contract's code.
Enterprise-Grade Process
With CMMI Level 5 and SOC 2 compliance, our auditing process is rigorous, documented, and repeatable. You receive enterprise-grade assurance, perfect for projects requiring regulatory compliance and institutional trust.
Actionable, Prioritized Reporting
We don't just dump a list of issues. Our reports categorize vulnerabilities by severity (Critical, High, Medium, Low), provide clear explanations, and offer concrete code recommendations for remediation, empowering your developers to fix issues fast.
Adversarial Mindset
We think like hackers to protect you from them. Our team actively participates in bug bounties and security research, staying on the bleeding edge of attack vectors to ensure your protocol is defended against current and future threats.
Beyond Security: Gas Optimization
An inefficient contract can cost your users thousands in transaction fees. Our audit includes a gas optimization analysis, providing recommendations to make your dApp more efficient and cost-effective for your community.
Collaborative Partnership
We view an audit as a partnership. We work closely with your development team, offering a dedicated communication channel for questions and providing post-audit support to verify fixes and ensure a secure deployment.
Public Trust & Verification
Upon successful remediation, we provide a public audit report and an official attestation. This serves as a verifiable "seal of approval," building critical trust with your users, investors, and the wider Web3 community.
Our Comprehensive Smart Contract Audit Services
We provide a full spectrum of security services tailored to the unique needs of the decentralized ecosystem. From DeFi protocols to enterprise solutions, we ensure your on-chain logic is sound, secure, and ready for production.
1. Comprehensive DeFi Protocol Audits
In the high-stakes world of Decentralized Finance, a single flaw can lead to multi-million dollar exploits. Our DeFi audits go deep into the economic models and complex interactions of your protocol to prevent flash loan attacks, reentrancy, oracle manipulation, and other common vectors.
- In-depth analysis of lending/borrowing, staking, and yield farming logic.
- Economic model simulation to identify potential exploits and market manipulation risks.
- Assessment of governance mechanisms and admin key privileges to prevent hostile takeovers.
2. NFT & Marketplace Contract Audits
We secure the backbone of the creator economy. Our audits for NFT (ERC-721/1155) contracts and marketplaces focus on ensuring fair minting processes, preventing fraudulent ownership transfers, and securing royalty payment mechanisms.
- Verification of minting logic to prevent exploits like re-mints or unfair distribution.
- Security analysis of auction and bidding mechanisms in marketplace contracts.
- Protection against common NFT-related vulnerabilities and adherence to token standards.
3. Standard Token Contract Audits (ERC-20, BEP-20, etc.)
Your token is the lifeblood of your project. We audit your token contract to ensure it complies with established standards, has proper access controls, and is free from vulnerabilities that could compromise its integrity or supply.
- Compliance checks against official ERC/BEP standards for seamless ecosystem integration.
- Analysis of tokenomics implementation, including supply caps, burning, and minting functions.
- Prevention of vulnerabilities like integer overflow/underflow and unauthorized transfers.
4. Gas Optimization & Performance Analysis
High gas fees are a major barrier to user adoption. Our audit includes a detailed analysis of your contract's gas consumption, providing actionable recommendations to reduce transaction costs and improve on-chain performance.
- Identification of inefficient code patterns and data structures.
- Recommendations for optimizing loops, storage, and function calls.
- Benchmarking of key functions to quantify performance improvements.
5. Formal Verification Services
For mission-critical contracts where absolute certainty is required, we offer formal verification. This mathematical approach proves that your smart contract's logic behaves exactly as intended under all possible conditions, eliminating entire classes of bugs.
- Creation of a formal specification that mathematically defines the contract's intended behavior.
- Use of industry-leading tools to rigorously check the code against the specification.
- Ideal for core financial protocols, custody solutions, and critical infrastructure.
Our Rigorous 4-Step Audit Process
1. Scoping & Automated Analysis
We begin by understanding your project's architecture and business logic. Our AI-powered static and dynamic analysis tools then perform an initial sweep, identifying common vulnerabilities and code quality issues to establish a baseline.
2. Manual Code Review & Logic Assessment
This is the core of our audit. Our security experts conduct a line-by-line manual review, focusing on the business logic, access controls, and potential economic exploits that automated tools cannot detect. We think like an attacker to find every possible flaw.
3. Reporting & Collaborative Remediation
We deliver a comprehensive report detailing all findings, categorized by severity, with clear explanations and actionable recommendations. We then establish a direct line of communication with your team to discuss the findings and guide the remediation process.
4. Verification & Final Attestation
Once your team has implemented the fixes, we perform a verification audit to ensure all vulnerabilities have been effectively resolved. Upon successful verification, we issue a final audit report and public attestation, certifying your project's commitment to security.
Real-World Impact: Our Audit Success Stories
Securing a $50M TVL Lending Protocol from a Critical Reentrancy Flaw
Industry: Decentralized Finance (DeFi)
Client Overview: A fast-growing DeFi startup launched a novel lending and borrowing protocol on the Ethereum network. With their Total Value Locked (TVL) quickly approaching $50 million, they recognized the urgent need for a comprehensive, third-party audit to secure user funds and build institutional trust before scaling further.
Key Challenges:
- Protecting a large and growing pool of user assets from potential exploits.
- Ensuring the complex interest rate calculation model was free of manipulation vectors.
- Validating the security of the liquidation mechanism under extreme market volatility.
- Building trust with the community and potential institutional investors.
Our Solution:
Our team conducted a multi-faceted audit combining automated analysis with deep manual review. We focused on the economic logic and state-changing functions, simulating various attack scenarios.
- Identified a critical reentrancy vulnerability in the withdrawal function that could have allowed an attacker to drain the protocol's entire liquidity pool.
- Discovered a medium-severity flaw in the oracle price feed integration that could be manipulated during high network congestion.
- Provided specific, gas-efficient code recommendations using the checks-effects-interactions pattern to mitigate the reentrancy risk.
- Worked directly with their developers to implement and verify the fixes, ensuring the protocol was fully secured.
Ensuring Fair Mints and Preventing Exploits for a High-Profile NFT Launch
Industry: NFTs & Digital Collectibles
Client Overview: An established digital artist partnered with a development studio to launch a highly anticipated 10,000-piece PFP (Profile Picture) NFT collection. With massive community hype and a whitelist of over 50,000 users, ensuring a smooth, fair, and exploit-free minting process was their top priority.
Key Challenges:
- Preventing bots from sniping the collection during the public sale.
- Ensuring the whitelist and minting logic were tamper-proof.
- Verifying the randomness and provenance of NFT trait distribution.
- Protecting the contract's ownership and royalty funds post-mint.
Our Solution:
We performed a pre-launch audit focused on the ERC-721 contract and its associated minting and metadata logic. Our approach prioritized fairness and security throughout the launch phases.
- Uncovered a flaw in the whitelist verification that could have allowed a single user to mint multiple times.
- Recommended improvements to the minting function to make it more resistant to botting and gas wars.
- Validated the on-chain provenance hash mechanism, ensuring the trait distribution could not be predicted or manipulated pre-reveal.
- Strengthened access controls on administrative functions to secure withdrawal of primary sale funds.
Validating a Supply Chain Smart Contract for a Fortune 500 Client
Industry: Enterprise Blockchain & Supply Chain
Client Overview: A global logistics leader was developing a private blockchain solution to track high-value pharmaceuticals through their supply chain. The smart contracts needed to be flawless to ensure data integrity, meet regulatory compliance, and manage automated payments between manufacturers, distributors, and pharmacies.
Key Challenges:
- Ensuring the immutability and correctness of the chain-of-custody data.
- Securing the complex state machine logic that governed asset handovers.
- Guaranteeing that access control permissions were strictly enforced for all participants.
- Meeting stringent internal security and compliance standards for enterprise software.
Our Solution:
Our audit focused on the unique requirements of a permissioned enterprise environment. We analyzed the role-based access control, the business process logic, and the integration points with off-chain systems.
- Identified a potential race condition in the asset transfer function that could have led to duplicated records under specific circumstances.
- Strengthened the role-based access control logic to prevent unauthorized status updates.
- Provided recommendations for event logging to improve off-chain monitoring and compliance reporting.
- Delivered a CMMI 5-compliant audit report that satisfied the client's internal risk management and quality assurance teams.
Platforms & Languages We Secure
Our expertise spans the entire Web3 ecosystem. We audit contracts on all major EVM-compatible chains and are proficient in the languages and technologies that power decentralized applications.
What Our Clients Say
"The audit from Errna was incredibly thorough. They found a critical vulnerability our internal team missed, potentially saving us millions. Their report was clear, concise, and their team was a pleasure to work with during remediation. Absolute professionals."
"As a non-technical founder, I needed an audit partner I could trust to explain complex risks in simple terms. Errna did exactly that. They gave us the confidence to launch our NFT project knowing it was secure and fair for our community."
"We engaged Errna to audit our enterprise supply chain solution. Their process maturity and detailed documentation were exactly what our compliance department needed. They delivered on time and exceeded our expectations."
Frequently Asked Questions
The cost of an audit depends on the complexity and length of the smart contract code. A simple ERC-20 token might start in the low thousands, while a complex DeFi protocol can be significantly more. We provide a custom quote after an initial review of your codebase. Remember, the cost of an audit is an investment to prevent a potentially catastrophic loss.
Timelines vary based on code complexity. A standard audit typically takes 1-3 weeks. This includes the initial analysis, manual review, report generation, and a round of verification after your team implements fixes. We can often accommodate expedited timelines for urgent projects.
To begin, we typically need access to your private code repository (e.g., GitHub), any technical documentation you have, and a clear understanding of the project's intended functionality. A preliminary call with your development team is also highly beneficial.
Yes. Our standard audit process includes one round of verification to confirm that the vulnerabilities we identified have been correctly patched. If you make significant architectural changes later, we can scope a re-audit at a reduced cost.
No security audit can provide a 100% guarantee against all possible exploits, as new attack vectors are constantly emerging. However, a professional audit from a reputable firm like Errna significantly reduces your risk by identifying and eliminating known vulnerabilities and logical flaws. It is a critical and non-negotiable step in securing any Web3 project.
Ready to Secure Your Smart Contracts?
Don't leave your project's future to chance. A single oversight can cost everything. Let our expert auditors provide the peace of mind you need to launch and scale with confidence. Schedule a free, no-obligation consultation to discuss your project's security needs.
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