We deliver audit-ready code for ERC-20, ERC-721, and custom logic, ensuring your tokenomics and business rules are executed flawlessly on-chain. Our contracts are built with OpenZeppelin standards and include comprehensive testing suites.
LABS
Services
Cairo Program zk-Verifier Audit
Expert security assessment of Cairo programs and StarkNet verifiers. We audit the correctness of AIR constraints, proof generation logic, and the integration with StarkWare's prover toolchain to eliminate critical vulnerabilities.
Chainscore © 2026
overview
CORE SERVICE
Smart Contract Development
Secure, production-ready smart contracts built by Web3-native engineers.
- DeFi Protocols: Custom AMMs, lending/borrowing systems, and yield vaults.
- NFT Ecosystems: Generative collections, marketplaces with royalties, and utility-driven contracts.
- Enterprise Logic: Multi-signature wallets, DAO governance modules, and verifiable supply-chain tracking.
- Security First: Every line undergoes peer review and is optimized for gas efficiency and attack resistance.
From concept to mainnet deployment in as little as 4-6 weeks, with guaranteed post-launch support and upgrade pathways.
key-features-cards
PROVEN PROCESS
Our Audit Methodology for Cairo & StarkNet
Our structured, multi-layered approach ensures your Cairo program's logic, security, and performance are rigorously validated before deployment. We focus on delivering actionable insights, not just a checklist.
01
Architecture & Design Review
We analyze the high-level system design, data flow, and integration points with L1 Ethereum. This pre-audit phase identifies architectural risks and ensures the Cairo program aligns with StarkNet's execution model.
100%
Architecture Coverage
Day 1
Risk Identification
02
Manual Code Review
Senior auditors conduct line-by-line analysis of your Cairo 1.0/2.0 code. We focus on logic errors, StarkNet-specific vulnerabilities (e.g., storage pointer safety), and adherence to Cairo best practices.
100%
Manual Line Review
5+ Years
Avg. Auditor Exp.
03
Automated Analysis & Fuzzing
We employ custom static analysis tools and property-based fuzzing to uncover edge cases and invariant violations that manual review may miss, simulating millions of execution paths.
10M+
Paths Tested
Custom Tools
Analysis Suite
04
Formal Verification Assistance
For critical components, we assist in specifying and verifying formal properties using Cairo's native proof system, providing mathematical certainty for core financial logic.
Mathematical
Certainty
Core Logic
Focus Area
05
Gas & Performance Optimization
We profile your verifier's L1 and L2 gas consumption, identifying optimization opportunities to reduce user costs and improve transaction throughput without compromising security.
Up to 40%
Gas Savings
Full Profile
L1 & L2 Costs
06
Remediation & Final Verification
We provide prioritized findings with clear remediation guidance and conduct a final verification audit on the fixed code to ensure all critical issues are resolved before mainnet deployment.
Priority
Findings List
Re-audit
Guaranteed
benefits
SECURITY FIRST
Why a Specialized zk-Verifier Audit is Critical
Standard smart contract audits are insufficient for Cairo-based zk-Verifiers. These programs are the cryptographic heart of your validity rollup, requiring deep expertise in zero-knowledge proofs, Cairo VM internals, and StarkNet's security model. A missed vulnerability here compromises the entire chain's integrity.
01
Cryptographic Proof Verification
We audit the core logic that validates STARK proofs, ensuring soundness against adversarial inputs and preventing invalid state transitions from being finalized on L1.
100%
Proof Soundness Review
Cairo VM
Execution Context
02
Cairo-Specific Vulnerability Detection
Our experts identify risks unique to Cairo, such as non-deterministic hints, unsafe built-in usage, memory corruption, and arithmetic overflows in the finite field, which generic auditors often miss.
50+
Cairo-Specific Checks
OpenZeppelin
Methodology
03
L1/L2 Bridge & State Transition Security
We verify the verifier's interaction with the L1 bridge contract and the state update logic, guarding against double-spends, fake proofs, and synchronization attacks.
End-to-End
Data Flow Analysis
Solidity + Cairo
Cross-Layer Audit
04
Gas & Performance Optimization
Beyond security, we analyze and recommend optimizations for proof verification costs, a critical factor for your rollup's operational economics and user transaction fees.
Up to 40%
Potential Gas Savings
Benchmarked
Against Standards
05
Formal Verification Readiness
We structure findings and provide remediation guidance that prepares your codebase for formal verification tools, delivering mathematical certainty for your core proving logic.
Spec-Driven
Audit Approach
Giza, Kani
Tool Compatibility
06
Regulatory & Institutional Confidence
A specialized audit from recognized experts provides the assurance required by institutional partners, investors, and auditors evaluating the security of your chain's settlement layer.
Audit Report
For Due Diligence
Certified
StarkNet Devs
Transparent Pricing & Services
Standard Audit Scope & Deliverables
A detailed breakdown of our Cairo zk-Verifier audit packages, designed to match your project's security needs and stage.
| Audit Component | Essential | Comprehensive | Enterprise |
|---|---|---|---|
Cairo Program Logic Review | |||
STARK Proof System Verification | |||
Cryptographic Primitive Analysis | |||
Gas & Performance Optimization | |||
Formal Verification Report | Summary | Detailed | Detailed + Remediation Plan |
Remediation Support | 1 Round | 2 Rounds | Unlimited |
Response Time SLA | 72 hours | 48 hours | 24 hours |
Post-Audit Consultation | |||
Verifier Deployment Review | |||
Starting Price | $8,000 | $25,000 | Custom Quote |
process-walkthrough
FOUNDATION
Custom Blockchain Development
Build your core blockchain infrastructure with battle-tested protocols and expert architecture.
We architect and deploy custom Layer 1, Layer 2, and app-chain solutions tailored to your specific transaction volume, finality, and decentralization requirements. Our development is built on audited codebases like Cosmos SDK, Substrate, and OP Stack.
Deliver a production-ready chain in weeks, not months, with a clear path to mainnet launch.
- Smart Contract Integration: Native support for
EVM,CosmWasm, or custom VMs. - Consensus & Security: Implement
Tendermint,IBFT, or other BFT consensus with validator set management. - Node Infrastructure: Full deployment of RPC endpoints, block explorers, and indexers with 99.9% uptime SLA.
zk-Verifier Audit
Frequently Asked Questions
Get clear answers about our specialized Cairo program zk-Verifier audit process, timelines, and deliverables.
Our standard audit engagement for a Cairo-based zk-Verifier program takes 2-3 weeks from kickoff to final report. This includes a 1-week deep-dive analysis, a 1-week review and verification period, and a final week for report generation and a remediation walkthrough. Complex protocols with multiple verifiers or custom Cairo-Cairo VM interactions may extend this timeline, which we scope and communicate upfront.
ENQUIRY
Get In Touch
today.
Our experts will offer a free quote and a 30min call to discuss your project.
NDA Protected
Confidentiality24h Response
Time to ValueDirectly to Engineering Team
No Sales Fluff10+
Protocols Shipped
$20M+
TVL Overall