Smart Contract Solutions

Smart Contract Audit

Static scans plus manual exploit reviewDeFi, NFT, proxy, and upgrade scopesFoundry fuzz and invariant regressionsMixBytes primary partner · broad auditor network

OQTACORE performs smart contract audits that combine automated analysis, manual code review, economic-risk reasoning, exploit simulation, and developer-friendly remediation guidance before you expose funds or reputation to mainnet.

Get a clear, prioritized view of what is actually risky in your contracts, with proof-of-concept exploit scenarios where useful and a remediation plan your engineers can actually act on.

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Engagements typically run 3–8 weeks · Scoped from one critical module to a full protocol plus upgrades.

Since 2017Shipping Web3 and deeptech products

50+Full-scale apps shipped

20+Blockchains supported in production

MixBytesPrimary smart contract audit partner

Working alongside

Smart contract audits

Primary audit partner:MixBytes

Also audited by:Pashov ·0xleastwood ·Zellic ·Certik ·Halborn ·Hacken ·Sherlock

What it is

Defining smart contract audit

Smart contract audit is the discipline of inspecting EVM logic for correctness and adversarial faults, tying each issue to reachable states, economically meaningful loss, and upgrade or governance edges, then grading fixes so teams can ship with an evidence trail external reviewers can follow.

OQTACORE layers automated scanning with senior manual review so reentrancy, oracle and price-manipulation paths, mis-scoped roles, initialization gaps, and proxy storage-layout mistakes surface as reproducible findings before capital is callable on-chain.

What you get

What OQTACORE delivers in smart contract audit

Senior engineers, security-aware architecture, and an operations-ready handoff. Every engagement is scoped to your specific product, chain, and timeline.

Manual code review

Senior auditors read every meaningful function and document where invariants live, where they break, and what depends on them.

Automated analysis

Slither, Mythril, Aderyn, and custom tooling — used as a first pass, not a substitute for thinking.

Fuzzing and invariants

Echidna and Foundry-based property and invariant testing for the parts of the protocol where math has to hold.

Exploit simulations

Foundry proof-of-concept tests for findings that benefit from concrete demonstration to your team.

Economic review

Liquidations, oracles, MEV, fees, incentives, and rebasing tested against adversarial scenarios, not just unit tests.

Launch readiness

Deployment scripts, role keys, pause and upgrade flows, monitoring, and incident-response checklists, not just a PDF.

How an audit engagement flowsEach phase produces artefacts the next can trust — not a single monolithic review at the end.

How we work

A six-phase smart contract audit delivery you can plan around

Predictable milestones, clear ownership, and a security pass on every meaningful change. No mystery between scoping and launch.

Scoping and threat model

Define exact contracts and modules in scope, asset flows, trust assumptions, integration boundaries, and the worst case for each role.

Automated analysis

Static analyzers, fuzzers, and symbolic execution surface a first wave of issues that we triage and filter to remove false positives.

Manual review

Senior auditors read every meaningful function, model economic risk, and look for issues the tooling will not catch — especially around incentives.

Exploit simulation

We write proof-of-concept tests for findings that warrant them so the impact and remediation are unambiguous to your team.

Remediation and re-review

Track each finding through your fix, re-test, and confirm the new behavior. Severity downgrades only happen when the code earns them.

Final report and launch readiness

Final report with prioritized findings, mitigations, deployment recommendations, and a launch-day checklist for monitoring and incident response.

Need findings triaged before your external audit?

Tell us about your product, chain, timeline, and the outcome you need. We will reply within one business day with a clear next step — a scoping workshop, an audit, or a delivery plan.

Start a conversation

Five fields. We respond within one business day.

Technology

The stack we use for smart contract audit

We pick tools because they make the product safer, faster, or easier to operate — not because they are trending. Here is what tends to show up in smart contract audit work.

Slither

Mythril

Foundry

Hardhat

Echidna

Tenderly

OpenZeppelin

Solidity

Chains we ship to

Ethereum Arbitrum Polygon BNB Chain

How they differ

Smart contract audit vs. internal-only review before launch

Both teams read Solidity. Only one routes findings through independent severity discipline, archived tool output, and handoff artifacts an external auditor can reuse without replaying the whole discovery phase.

Dimension

Smart contract audit with OQTACORE

Internal-only pre-launch review

Threat model

Documented assets, roles, trust boundaries, and failure incentives shared with reviewers.

Assumptions stay informal; economic attack paths are often noticed after deploy.

Tooling

Slither, Mythril-class analysis, and Foundry fuzz stored with each revision.

Spot checks and unit tests; coverage holes stay unknown until incidents.

Finding quality

Each critical pairs repro steps, impact, and fix guidance auditable by a third party.

Bug lists mix severity styles; showstoppers can be downgraded to ship on time.

Incentives

Reviewers are chartered to challenge the happy path, not protect the schedule.

The same engineers who wrote the code also sign off, which blunts doubt.

Launch posture

Remediation is proven with added tests before mainnet and audit kickoff.

Hot patches land without invariant or fork replay, reopening dormant risk.

Outcomes

What smart contract audit delivers in production

Ranked exploit backlogSeverities tied to reachable PoCs and loss narratives

Tool-backed evidence trailsSlither and Mythril exports stored per reviewed commit

Verified remediation loopsPatch diffs gated on new Foundry tests passing

External audit briefing packScope, threats, diagrams, repro zips ready to share

Standards we work to

References our smart contract audit engagements rely on

We treat these documents as the working baseline for design, testing, and review. Linking out so you can verify the reasoning instead of taking our word for it.

SlitherStatic analysis framework we archive with each snapshot for repeatable diffs.MythrilSymbolic analyzer we use to hunt deep transaction sequences static passes can miss.Foundry BookReference for forge fuzz, invariant, fork, and gas testing we require on every fix.OpenZeppelin ContractsSecurity patterns for proxies, access control, and tokens we compare code against.OWASP Smart Contract Top 10Community control list we map findings against so coverage stays gap-aware.

Where smart contract audit with OQTACORE pays off

High-stakes launches — new AMM curves, isolated lending markets, cross-margin vaults, liquid staking derivatives, NFT mint contracts with allowlists, GameFi economies, DAO treasuries, bridge adapters, restaking modules, and permissioned RWA pools — benefit when economic and implementation risks are named before liquidity arrives. Even battle-tested patterns fail when parameters, composability, or slight opcode-level assumptions drift from the reference design.

An engagement is not only a PDF. You receive updated tests, CI hooks, diff-reviewed patches, and communication rhythm that slot into your release train. We stay explicit that examples such as Uniswap-style AMMs, Aave-style lending markets, OpenZeppelin proxy kits, or Chainlink-style oracle feeds illustrate industry patterns — not prior OQTACORE client work — while calibrating the rigour your launch demands.

How a smart contract audit engagement starts

Kickoff is a half-day to day-long technical session covering architecture diagrams, repository access, threat modeling notes, branch policy, deployment plans, and the launch window. We agree acceptance criteria for documentation, tooling exports, meetings, reporting format, and confidentiality so expectations stay visible to engineering, product, and compliance stakeholders.

After scoping you receive a milestone plan that may cover focused module review, repository-wide pass, post-fix reverification, live-fork replay of production configuration, or an audit-prep track ahead of MixBytes. Shorter crisis reviews can target a single vulnerability class or an emergency patch set; larger programs layer internal review, external audit coordination, and mainnet hypercare so fixes stay auditable through go-live.

Related work

Services teams usually combine with smart contract audit

Most engagements pair smart contract audit with a few neighbours. Open the ones closest to your project to see how we deliver them.

Smart Contract Development

Design, build, test, and deploy production smart contracts for DeFi, tokens, RWA, payments, DAOs, and Web3 apps.

Learn more

Solidity Development

Solidity engineering for Ethereum and EVM chains: account abstraction, upgradeable contracts, and protocol integrations.

Learn more

DeFi Smart Contract Development

AMMs, lending, staking, vaults, derivatives, liquidity incentives, and risk-controlled DeFi protocol modules.

Learn more

Token Smart Contract Development

ERC-20, ERC-721, ERC-1155, governance, vesting, utility, and security tokens with launch controls.

Learn more

MVP Development

Launch a focused MVP with product discovery, UX, backend, integrations, analytics, and investor-ready delivery.

Learn more

Blockchain Development

Build blockchain networks, protocols, integrations, wallets, data services, and production Web3 applications.

Learn more

FAQ

Smart Contract Audit — questions before you start

The answers most teams ask for before scoping a project with us.

What does a smart contract audit cost and how long does it take?

Most OQTACORE smart contract audit engagements run about 3–8 weeks after materials are stable, with cost tied to lines of code, module count, oracle and upgrade complexity, and how many revision cycles you want. We issue a fixed-scope proposal after repository walkthrough so pricing reflects the attack surface you actually ship, not a generic retainer.

Which systems and languages can OQTACORE review during a smart contract audit?

We focus on EVM bytecode and Solidity-centric repositories, including Hardhat and Foundry layouts, upgradeable proxy stacks, governance modules, token standards, DeFi primitives, NFT mint and marketplace routes, and supporting TypeScript or Python off-chain services when they influence on-chain trust. Tooling references include Slither, Mythril-class analyzers, Foundry fuzz, and OpenZeppelin pattern checks tied to your architecture.

Do you run the external audit, or do we bring our own firm?

OQTACORE performs the internal security and audit-readiness work described here, then coordinates handoff with MixBytes as the primary audit partner when you want that path. Teams may instead engage auditors from the broader network that has reviewed OQTACORE contracts — Pashov, 0xleastwood, Zellic, Certik, Halborn, Hacken, Sherlock — and we reshape scope documents, reproducible repos, test suites, and fix logs so whichever firm you pick starts from structured evidence.

How long does smart contract audit take?

A small, well-scoped module can take 2–4 weeks. A protocol, tokenization workflow, marketplace, or DeFi system can take 6–16+ weeks depending on integrations, testing depth, audit requirements, and governance complexity.

Can OQTACORE work with an existing codebase?

Yes. We can review existing contracts, improve tests, fix vulnerabilities, add features, prepare for audit, or integrate the contracts with backend and frontend systems.

Do you provide audits as well as development?

Yes. We provide internal security review and audit-preparation support, and we can also help resolve third-party audit findings. For high-value launches, an independent external audit is still recommended.

Which chains do you support?

We commonly work with Ethereum and EVM-compatible networks, and can support other ecosystems depending on scope. Chain choice is usually part of the architecture discussion.

Can you also build the application around the contracts?

Yes. OQTACORE can deliver the frontend, backend, wallet flows, APIs, indexing, analytics, admin panels, CI/CD, monitoring, and documentation needed to turn contracts into a product.

Ready when you are.

Send a few lines about your project. We will reply within one business day with a clear next step — a scoping workshop, a security review, or a delivery plan with milestones.

Prefer a longer brief or want to share an NDA before we exchange details? Mention it in the message and we will route it appropriately.

Engagements typically run 3–8 weeks · Scoped from one critical module to a full protocol plus upgrades.

Page last reviewed May 7, 2026

Start a smart contract audit with OQTACORE

One business day reply. NDA on request.