What Is A Smart Contract Audit And Why Is It Essential Before Deployment?

What sprouted just as a theoretical idea put forth by Nick Szabo in the 1990s, “Smart Contracts” are now the real power behind blockchain technology and the Web3 innovations. Nobody could have predicted that something so unimaginable would actually materialise and impact industries like finance, healthcare, insurance, or nearly any sector seeking automation, security, and efficiency.

These digital agreements are cited with the conditions for their execution, particularly business logic on the blockchain network. Clearly, they contain the most critical data and play a massive role in driving growth among all the verticals worldwide. Thus, they are important, and so is their security.

Web3 technologists take the security of smart contracts very seriously for every blockchain project, whether it’s just for a token, a dApp, or a thriving NFT marketplace. They emphasise smart contract audits, not simply as an option but as a major prerequisite for Smart Contract Development.

In this guide, we will dig a little deeper into smart contract audits and why they are so important.

Understanding Smart Contract Audit

As the term implies, a smart contract audit is the thorough technical evaluation of the smart contracts to detect issues in their source code that can impact their intended functionality and essential security. Furthermore, this process includes identifying the methods for effectively resolving the identified issues.

The technical assessment of smart contract solutions includes inspecting the code for the following:

• Spot potential security vulnerabilities
• Find coding errors, defects, and inefficient code segments.
• Detect logical inconsistencies in the code
• Measure system reliability and performance
• Diagnose issues with storage, data management, memory usage, runtime environment, and other operational parameters.

Smart contract audit is vital due to the immutable nature of blockchain. Although immutability is a generally beneficial feature, it makes it impossible to address any issues once the smart contract is deployed.

That is why a smart audit is performed before deployment to ensure that it adheres to the best coding practices, performs well in the live environment, and cannot be exploited by any unauthorised party. But! This is just the tip of the iceberg! Let’s look at the importance of smart contract auditing in more detail.

Also Read: Why Smart Contract Testing is Crucial for Your Business?

Why Is A Smart Contract Audit Required Prior To Deployment?

Any issue with the smart contract code, even if it is a minor one, can lead to security breaches and substantial monetary losses.

The blockchain industry still hasn’t gotten over the DAO hack of 2016. It led to a loss of around $60 million due to a reentrancy vulnerability. Moreover, in 2022, the famous Wormhole bridge exploit resulted in a loss of about $325 million. It was the result of a validation flaw in the smart contract.

Smart contract audits help industries identify and correct flaws, hence securing valuable business data worth millions. It is because with smart contract audits, any type of vulnerability is addressed on time, prior to deployment. Thus, exploitation can be easily avoided.

Along with minimising financial losses, a smart contract audit can help with:

• Maintain Compliance: Companies can avoid major legal issues by complying with security standards and other regulatory requirements.
• Build User Trust: Platform users prefer secure and transparent systems. A well-audited protocol encourages users to trust it and use it confidently.
• Avoid Reputation Damage: A smart contract audit can help business owners to avoid reputation damage, which rarely leads to the recovery of community trust.
• Validate Code Integrity: Audit reports allow smart contract development companies to prove that the contract is built using best coding practices.

How Does A Smart Contract Audit Work?

A smart contract audit is actually beneficial when it is done correctly. And it genuinely means checking the extra lengthy and complex lines of the source code. Using manual coding alone may result in some human errors. That’s why Smart Contract Development Company uses a well-structured and proven smart contract audit process, which is as follows:

Initial Assessment and Defining Objectives

Instead of blindly jumping into auditing, smart contract auditors would first carry out an initial assessment to define the scope and objectives of the project. Even the smart contract developers collaborate with auditors and define:

• Security standards
• Code compliance standards
• Smart contract logic

Manual Code Review

An auditor or team of auditors would go through the code, checking each and every line of code. They will look for logical errors, security vulnerabilities, and other code mistakes, as well as ensure that code standards are followed.

Automated Analysis

Not replacing but supplementing manual reviews, automated analysis tools are employed for scanning the smart contract code. This approach comprises the use of tools like Slither, Mythril, Oyente, and more for static and dynamic analysis that includes:

• Unit Testing
• Integration Testing
• Fuzzing (random input testing)
• Stress Testing

Simulation and Functional Testing

After the code is analysed, it is passed through functional testing and simulation. It makes it possible to verify the accuracy of smart contracts under a variety of circumstances, including the most unexpected ones.

Reporting And Recommendations

Once the audit is complete, all the spotted issues are gathered and structured in a report citing vulnerabilities and severity levels ranging from low to highly critical ones.

Along with this, the report will also include a list of recommendations for actually dealing with these issues, which developers can employ to fix them.

What Do Auditors Look For In Smart Contract Audits?

Let’s understand much deeper what the smart contract auditors actually spot while approaching highly critical blockchain projects.

Weak Administrative Access

If a smart contract has poor access control, even unauthorised users may be able to access it and manipulate it in some way. This would eventually lead to hefty financial and sensitive data losses.

That is why smart contract auditors look for strict role-based permissions in the smart contract solutions to ensure security and access management.

Gas Limit and Performance Issues

A smart contract performance audit looks for inefficiencies and bottlenecks. Highly complex or redundant code can cause inefficiencies and system failures. However, gas optimisation can improve system performance while also providing a better user experience.

Contract Logic Flaws

Testing and code review of smart contracts (both manual and automated) are essential for identifying logic flaws. Even minor errors can lead to incorrect execution of a smart contract, and that ultimately leads to operational failures and potential financial discrepancies.

Reentrancy Exploits

Smart contracts are thoroughly audited for reentrancy vulnerabilities. Reentrancy attacks are common in smart contracts. It involves a hacker calling a contract function multiple times before the initial execution is complete. Such attacks can impact the smart contract integrity, affecting both platform transactions and funds.

Wrapping Up

Smart contract auditing is an important step that should not be put off at all. It is necessary for the security and actual efficiency of any blockchain project. Moreover, employing both manual and automated approaches before deployment can help secure sensitive data and enterprise assets while maintaining operational reliability.

However, Smart contract audits can be effective, but only if performed by a reputable smart contract development company!

At Webcom Systems, we have a team of experienced smart contract auditors who take special care of the security and integrity of every smart contract we develop. We have all of the latest tools and technologies to equip our auditors to perform the best smart contract auditing possible. Not only is a smart contract audit an essential step in any project, but we also offer specialised smart contract services for your blockchain solutions. Get in touch to learn more about our approach to smart contract auditing.

Also Read: What are Smart Contracts in Blockchain and How Do They Work?