Smart Contract Audit

Smart contracts are irreversible by default and adversarial by nature. Once value is live, attackers don’t “report bugs,” they atomize your TVL. We prioritize real loss paths and economic abuse, not cosmetic linting.

What we cover

  • Access control and privilege boundaries

  • State transitions, invariants, and asset accounting

  • External calls, reentrancy, and callback surfaces

  • Upgradeability, initialization, and governance controls

  • Oracle/price dependencies and MEV exposure

  • Integration surfaces (bridges, routers, hooks, vaults)

Common Failure Modes

Asset loss and accounting breaks

Asset loss and accounting breaks

  • Incorrect balance accounting and share math drift
  • Rounding/precision extraction over repeated actions
  • Unsafe assumptions about token behavior and transfers
Control-plane compromise

Control-plane compromise

  • Missing/weak authorization checks
  • Admin/upgrade key risks and unsafe initializers
  • Governance capture vectors and privileged bypasses
Adversarial execution environment abuse

Adversarial execution environment abuse

  • Reentrancy and cross-function reentrancy
  • MEV and sandwichable state transitions
  • Oracle manipulation and timing-based extraction

How we work

01

Spec first

Spec first

expected invariants and safety properties

02

Manual review

Manual review

logic, accounting, and trust boundaries

03

Adversarial testing

Adversarial testing

“how do I steal or freeze funds?”

04

Property checks

Property checks

fuzz/symbolic where it adds signal

05

Report + retest

Report + retest

fix validation, not vibes

Tools and Standards

Core Tooling

  • Foundry-based testing workflows (unit + invariant-style testing)
  • Medusa for fuzzing harnesses where properties are clear
  • Halmos for symbolic testing on critical behaviors
  • Certora for rule-driven formal verification when warranted

Audit outputs

  • Public-safe summary format (website/PR friendly)
  • Engineering appendix (full technical reproduction)
PortswiggerGithubMitreOWASP

What we map to

  • Protocol-specific invariants and “must never happen” properties
  • Attack-surface modeling aligned to real adversarial behaviors
Background

Deliverables

Securing High-Impact Enterprise System

What Our Clients Trust us with

Client Video
▶

We partnered with ImmuneBytes for a security audit of our products. Their expertise and professionalism instilled confidence throughout the process. They promptly addressed our questions, and their thorough analysis significantly enhanced our project's security, safeguarding our users' assets. We highly recommend ImmuneBytes and look forward to future collaborations.

Aruje Jahan

Lokr, Product Owner

ImmuneBytes demonstrated the perfect blend of expertise, commitment, and accountability, resulting in an audit that surpassed expectations. Their thorough approach and dedication ensured a high-quality outcome, reflecting their capability and professionalism in delivering exceptional service.

Dheeraj Borra

Stader Labs, Co-Founder

Robots can do audits, but the personal touch makes a difference. That's why we love Immunebytes! Not only do they do top-class audits, but they also take the time to understand our project and why certain things are done in specific ways. They take the time to ensure we feel heard, which shows in their work.

Yog Shrusti

Farmsent, Co-Founder & CEO

We are thoroughly impressed by their team, who left no scope for a communication gap and provided a quick turnaround time. They took up each requirement with utmost detail and acted on it. It was a pleasing experience to work with you. Looking to working with you guys again!

Mac P

Ethernity, Chief Engineer

What You Need to Know?

Frequently Asked Questions

We review your on-chain code before deployment to find vulnerabilities that could lead to fund loss, unauthorized access, or protocol manipulation. Unlike web apps, smart contracts can't be patched after deployment—audits are your last line of defense.

If you're deploying contracts that hold user funds, manage permissions, or interact with other protocols—you need an audit. This includes DeFi protocols, NFT projects, DAOs, token contracts, bridges, and wallets.

Deployed contracts are immutable. One missed vulnerability can drain millions with no undo button. Post-deployment fixes require redeployment, migration, and user trust recovery—expensive and often impossible.

Reentrancy attacks, access control failures, oracle manipulation, precision/rounding errors, unsafe external calls, initialization bugs, upgrade logic flaws, and protocol-specific economic exploits. The actual mix depends on your project type.

Automated tools (Slither, Aderyn) catch known patterns fast but miss business logic flaws and novel attacks.

Manual audits find what tools can't: economic exploits, governance attacks, integration risks, and context-specific vulnerabilities.

We use both—tools for speed, humans for depth.

Simple token contract: 1-2 weeks

DeFi protocol (2K-5K lines): 2-4 weeks

Complex multi-contract system (10K+ lines): 4-6 weeks

Use our pricing calculator—it factors in code size, complexity, chain, and project type. Ballpark: $8K-$50K+ depending on scope.

Ethereum/EVM chains, Solana, Cosmos, Polkadot, Move-based chains (Aptos/Sui), and custom chains. Different chains have different attack surfaces—we adapt our testing accordingly.

Use the "Submit Query" form on our website or email directly. We respond within 24 hours.

Secure Systems

Let’s Evaluate Risks and Secure your Systems

+917303699708team@immunebytes.com
Immunebytes

A blockchain security audit firm with the goal of making the Web3 space more secure through innovative and effective solutions.

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