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Smart Contract Audit Services for Secure Blockchain Deployment
Smart contract audits help identify vulnerabilities in smart contract code before they lead to security incidents. At A2CO, our smart contract audit service involves a detailed analysis of every line of code, using advanced tools to ensure the security and reliability of blockchain applications. With detailed reports, formal verification options and support from experienced auditors, we help ensure your contracts are ready for deployment.
What Is a Smart Contract Audit and Why Security Matters
A smart contract audit is a detailed security review of the codebase to ensure the smart contract works as intended and is free from critical vulnerabilities. Smart contracts are self-executing programs on the blockchain, often used in DeFi and Web3 projects to manage transactions, enforce agreements and remove third-party involvement. Because smart contracts can hold real value or manage key business operations, even a small error in the code can lead to serious security issues.
A smart contract security audit, carried out by experienced auditors or security researchers, helps identify risks, follow best practices, and prepare the contract for safe deployment on Ethereum or other networks. Our audit process involves both manual review and the use of tools to identify vulnerabilities across the entire codebase. Whether the goal is compliance, performance or trust, a proper blockchain security audit helps strengthen your smart contract and protects your users before launch. For projects preparing to launch a digital asset, we also offer token issuance services to support your next steps.
How Our Smart Contract Audit Process Works
Code Review
We begin with a full audit of the smart contract code to identify vulnerabilities and inefficiencies. Our smart contract audit service reviews the complexity of the contract and uses tools to ensure the code meets blockchain security standards, supports gas optimisation, and aligns with industry norms.
Functionality Testing
We test the contract’s logic by simulating various scenarios and inputs. This helps verify that individual functions behave correctly, and that the overall performance of your decentralised application matches expectations.
Security Testing
We conduct formal verification, unit tests, and integration tests as part of our security analysis. This step focuses on spotting smart contract vulnerabilities such as access control flaws, overflow errors and other security issues often found within the smart contract code. Our goal is to prevent security incidents before they occur.
Compliance Checks
If your blockchain project is subject to regulatory requirements, we align the audit with the original whitepaper and any legal documentation. Our blockchain security audits ensure smart contracts are ready for deployment, especially in regulated sectors like decentralised finance.
We also support token compliance advisory for teams navigating complex regulatory frameworks.
Documentation Review
We check all related documentation to ensure it is accurate, complete and easy to understand. This supports independent auditors, developers and stakeholders in reviewing the completed audit. Clear documentation also helps explain potential issues or updates required after the final report.
We can support multiple audits, bug bounty support, or audit contests depending on the size and complexity of the code. A2CO acts as your trusted security partner, helping you complete a smart contract security audit that enhances the performance and reliability of your blockchain and smart contract solutions.
Code Review
We begin with a full audit of the smart contract code to identify vulnerabilities and inefficiencies. Our smart contract audit service reviews the complexity of the contract and uses tools to ensure the code meets blockchain security standards, supports gas optimisation, and aligns with industry norms.
Functionality Testing
We test the contract’s logic by simulating various scenarios and inputs. This helps verify that individual functions behave correctly, and that the overall performance of your decentralised application matches expectations.
Security Testing
We conduct formal verification, unit tests, and integration tests as part of our security analysis. This step focuses on spotting smart contract vulnerabilities such as access control flaws, overflow errors and other security issues often found within the smart contract code. Our goal is to prevent security incidents before they occur.
Compliance Checks
If your blockchain project is subject to regulatory requirements, we align the audit with the original whitepaper and any legal documentation. Our blockchain security audits ensure smart contracts are ready for deployment, especially in regulated sectors like decentralised finance.
We also support token compliance advisory for teams navigating complex regulatory frameworks.
Documentation Review
We check all related documentation to ensure it is accurate, complete and easy to understand. This supports independent auditors, developers and stakeholders in reviewing the completed audit. Clear documentation also helps explain potential issues or updates required after the final report.
We can support multiple audits, bug bounty support, or audit contests depending on the size and complexity of the code. A2CO acts as your trusted security partner, helping you complete a smart contract security audit that enhances the performance and reliability of your blockchain and smart contract solutions.
DeFi, Web3, and Blockchain Smart Contract Vulnerabilities and How We Address Them
Even well-written smart contracts can carry hidden risks. These vulnerabilities might not be obvious at first, but they can be exploited once the contract is live on the blockchain. That is why our audit process focuses on identifying and resolving these issues early. We use a mix of manual and automated methods to spot these issues, test how they behave and suggest fixes.
Every finding is clearly documented, with recommendations on how to resolve or mitigate the risk. If your platform handles user onboarding or transactions, we also provide AML and KYC support for crypto firms to help you stay fully compliant. Our aim is to make your contract not only secure, but also robust and reliable for real-world use.
Here are some of the most common vulnerabilities we look out for:
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Re-entrancy attacks: Where an attacker repeatedly calls a function before the previous execution is finished, draining funds or disrupting operations.
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Integer overflows and underflows: Small miscalculations that can lead to major errors or unexpected behaviour.
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Access control issues: Weak or missing permission checks that allow unauthorised users to perform restricted actions.
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Uninitialised storage variables: These can be used to manipulate contract behaviour if not properly set.
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Business logic flaws: Mistakes in how the contract is designed to work, which could lead to unintended outcomes.
Our Services
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Full smart contract audits for Ethereum and other EVM-based blockchains
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Manual code review and automated analysis to identify vulnerabilities
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Detailed reports with risk assessment and clear recommendations
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Gas optimisation and performance improvements
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Formal verification for high-assurance use cases
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Audit readiness and documentation support for DeFi and token launches
Why Choose A2CO
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Clear, straightforward advice you can act on
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Experience across Ethereum and other major blockchains
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Trusted network of smart contract auditors
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Support from audit prep to final report
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Based in Malta, active across the EU
Frequently Asked Questions
A smart contract audit includes a thorough review of the code to identify vulnerabilities, logic flaws, and security issues, along with a detailed report outlining risks, recommendations, and suggested fixes.
Costs depend on the contract's length, complexity, and urgency, but most audits range from a few thousand to tens of thousands of euros.
The timeline depends on the size, complexity, and scope of the contract, as well as the level of review required. We’ll provide a clear estimate once we understand the details of your project.
Yes, a code audit is essential before launch to identify any critical vulnerabilities and ensure your smart contract is secure, reliable, and ready for deployment.
