Smart Contract Audit Services

We don’t just find vulnerabilities — we fix them. Dev-first smart contract audit by the team that writes production Solidity and Rust.

What We Find: Common Smart Contract Vulnerabilities

Reentrancy Attacks

We check contracts for reentrancy patterns that might let someone make repeated withdrawals in one transaction. This vulnerability has caused major losses in the past and is found through manual review and tools like Slither.

Oracle Manipulation

We check price feeds and outside data for signs of manipulation. Incorrect prices can trigger liquidations or allow someone to take funds, so we use multiple data sources and pricing checks to prevent this.

Flash Loan Exploits

Contracts are reviewed for vulnerabilities that can be exploited using uncollateralized loans. Detection focuses on transaction sequencing, price impact, and missing validation steps that allow rapid value extraction.

Access Control Failures

We verify role management and permissions to stop unauthorized actions like minting or transferring funds. Our checks cover admin access, ownership rules, and multi-signature requirements.

Integer Overflow / Underflow

Arithmetic operations are analyzed to prevent balance manipulation or incorrect calculations. Modern Solidity protections are verified alongside additional safety checks.

Logic Errors & Business Rule Violations

We validate contract logic to make sure it matches expected behavior, such as fee calculations, reward distribution, and handling edge cases. We use scenario-based testing to find inconsistencies and errors.

Layer Audit Methodology

1

Manual Code Review

The smart contract audit process begins with a careful review of each line of Solidity or Rust code. We focus on the business logic and how the contract is supposed to work. We compare the specification to the actual implementation to find inconsistencies, edge cases, and logic errors that automated tools might overlook.

2

Automated Analysis

We use static and dynamic analysis tools such as Slither, MythX, and fuzzing frameworks to find known vulnerability patterns. These automated checks help us identify reentrancy risks, arithmetic errors, and other common issues in smart contracts.

3

Layer 3 — Offensive Testing

We test contracts by simulating real attack scenarios, such as reentrancy, flash loan exploits, and front-running. We also create proof-of-concept exploits to check if vulnerabilities can actually be used in practice.

4

Layer 3 — Re-Audit After Fixes

Once fixes are made, we review all identified issues again to make sure they are fully resolved. We deliver the final report only after all critical and high-severity problems have been addressed.

Chains & Languages We Audit

1

Ethereum / EVM (Solidity)

Solidity smart contract audit across Ethereum mainnet, Arbitrum, Optimism, Polygon, BSC, and Base. Covers ERC-20, ERC-721, ERC-1155 standards, as well as DeFi, NFT, and governance contracts.

2

Solana (Rust / Anchor)

Solana smart contract audit for programs built with Rust and Anchor. Includes SPL tokens, Metaplex NFTs, and DeFi protocols with custom program logic.

3

Rust-Based Chains

Rust smart contract audit for ecosystems such as Cosmos (CosmWasm), NEAR, and Polkadot (ink!). Focus on contract execution logic, state handling, and cross-module interactions.

4

BSC / BNB Chain

BSC smart contract audit for BEP-20 tokens, PancakeSwap forks, and GameFi projects. Includes transaction logic validation, token behavior, and integration patterns.

What You Get: Audit Deliverables

Severity Classification

Every smart contract audit report sorts findings by severity: Critical, High, Medium, Low, or Informational. Each issue comes with context, its impact, and a recommended fix.

Proof-of-Concept Exploits

For critical and high-severity issues, we include working proof-of-concept exploits. These show how a vulnerability could actually be used, not just described in theory.

Remediation Guide

We explain fixes with clear references to functions and contract logic, showing exactly how and where to make changes.

Executive Summary

Stakeholders get a non-technical summary that covers the overall risk level, number of findings, and the audit result. This helps teams quickly understand the contract’s status.

Public Report Badge (optional)

You can choose to publish the audit and show a public badge that confirms your contract passed the security review.

Audit Process & Timeline

1

Day 1–2 — Scoping & Quote

We review your code to understand its complexity, scope, and any potential risks. Based on the contract size and your requirements, we prepare a timeline and cost estimate. The initial scoping is free of charge.

2

Week 1–2 — Deep Audit

Our audit uses a three-step approach: manual review, automated analysis, and offensive testing. We keep you updated throughout the process so you can see our findings and any potential risks.

3

Day 10–12 — Draft Report

We deliver a draft audit report that includes findings sorted by severity, proof-of-concept exploits, and a guide for remediation. You can schedule a review call with us to go over the results and ask any technical questions.

4

Week 3 — Remediation & Re-Audit

Identified issues are fixed, either by your team or as part of the engagement. We then verify all fixes through a re-audit, making sure that all critical and high-severity findings are resolved.

5

Final — Report & Badge

Once all key issues are addressed, we deliver the final report. You can also choose to publish the audit and display a public badge to show your project is ready for deployment.

Secure Your Smart Contracts Before Deployment

Make sure vulnerabilities are found, checked, and fixed before your contracts go live.

Why Choose Stubbs for Smart Contract Audit

1

Dev-First Audit Approach

Smart contract audit is performed by engineers who also build Solidity and Rust systems, which allows both identifying vulnerabilities and resolving them within the same process.

2

Focus on Real Attack Scenarios

Audit goes beyond static checks and includes simulation of real exploits such as reentrancy, flash loans, and oracle manipulation.

3

Clear and Actionable Reports

Each smart contract audit report includes severity classification, proof-of-concept exploits, and clear recommendations for fixing issues at the code level.

4

Re-Audit Until Issues Are Resolved

All critical and high-severity findings are verified after fixes, with re-audit included before final delivery.

FAQs

1.  

What is a smart contract audit?

A smart contract audit is a careful review of your contract’s code. We use both manual checks and automated tools to find vulnerabilities, test the logic, and make sure your contract works as intended before it goes live.

2.  

How much does a smart contract audit cost?

Prices usually range from $3,000 to over $60,000, depending on how many contracts you have, how much code there is, and how complex the logic is. We’ll give you a more accurate quote after a free review of your code.

3.  

How long does an audit take?

A typical audit for one contract takes about 3 to 5 days. If you have a larger protocol or platform, it can take 2 to 4 weeks. This schedule includes the first review, the report, and a follow-up audit after you make any fixes.

4.  

What does the audit report include?

The report organizes findings by how serious they are, adds proof-of-concept examples for major issues, and offers a guide with clear fixes. It also has an executive summary for stakeholders and an optional public audit badge.

5.  

Do you fix the vulnerabilities too?

Yes, we help fix any issues we find, not just report them. Fixes are included in the same engagement, and we’ll do a re-audit afterward.

6.  

Which chains do you audit?

We audit Ethereum and EVM-compatible chains, Solana, Rust-based platforms like NEAR and Cosmos, and BSC. Our approach changes based on the platform and programming language.

7.  

What tools do you use?

We use tools like Slither, MythX, Echidna, Foundry, and Certora, along with manual code review. This helps us find both common vulnerabilities and deeper logic issues.

8.  

Can you audit existing deployed contracts?

Yes, we can audit contracts that are already deployed in read-only mode. If your contract supports upgrades, we’ll suggest ways to improve its security and logic.

9.  

Do you provide re-audit after fixes?

Yes, a re-audit is included to make sure all critical and high-severity issues are fixed. We deliver the final report only after these vulnerabilities are addressed.

10.  

How to get started?

Send us your code or a GitHub link for an initial review. After we scope your project, you’ll get a detailed estimate and can move forward with the audit.

Still have questions?
Let’s talk — book a 15-minute intro call with our team
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We would love to help.

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