We architect and deploy custom Solidity/Rust smart contracts that are audit-ready from day one. Our development process integrates formal verification and OpenZeppelin standards to ensure security and gas efficiency.
LABS
Services
Cairo Program Formal Verification
We mathematically verify the correctness of your Cairo programs for StarkNet, ensuring provable computational statements, ZK-circuit logic, and business invariants are flawless before generating STARK proofs.
Chainscore © 2026
overview
CORE SERVICE
Custom Smart Contract Development
Secure, production-ready smart contracts built for your specific business logic.
- From Concept to Mainnet: We handle the full lifecycle—requirements, development, testing, and deployment.
- Protocol-Specific Logic: Build for DeFi (AMMs, lending), NFTs (dynamic metadata, staking), or enterprise use cases.
- Guaranteed Code Quality: Every contract includes comprehensive unit tests, integration tests, and documentation.
Deploy with confidence. We deliver contracts that are secure, scalable, and maintainable, reducing your time-to-market by weeks.
key-features-cards
PROVEN SECURITY
Our Formal Verification Capabilities
We mathematically prove the correctness of your Cairo programs, eliminating vulnerabilities before deployment. Our process delivers verifiably secure smart contracts for Starknet and other CairoVM-based chains.
01
Full Cairo 1.0 Specification Coverage
We verify the complete logic of your Cairo 1.0 programs, including complex operations, storage interactions, and system calls. This ensures your contract behaves exactly as specified, with no hidden edge cases.
100%
Logic Coverage
Cairo 1.0+
Language Support
02
Automated Invariant & Property Testing
We define and automatically prove critical business invariants (e.g., "total supply is constant", "user balance never negative") using formal methods. This catches logical flaws that traditional testing misses.
Zero False Positives
Result Accuracy
Custom Properties
Per-Client Rules
03
Integration with Existing Dev Workflows
Our verification process integrates directly with your CI/CD pipeline via GitHub Actions or GitLab CI. Get proof reports on every pull request, ensuring security is maintained throughout development.
< 5 min
Avg. CI Runtime
Pre-Merge Gates
Security Enforcement
04
Comprehensive Security Audit Companion
Our formal verification report serves as a foundational document for manual security audits, drastically reducing review time and cost. We provide machine-checked proofs of core contract properties.
Up to 40%
Audit Cost Reduction
Proof-Backed
Audit Deliverable
05
Expert-Led Verification Strategy
Our team of formal methods experts designs the verification strategy, selecting the right tools and theorems for your specific contract. We handle the complexity so your team can focus on building.
PhD-Level Experts
Team Credential
Strategy Session
First Deliverable
06
Verification for Upgradable Contracts
We formally verify the safety of upgrade paths and proxy patterns, ensuring state consistency and preventing storage collisions during migrations—a critical need for production DeFi systems.
Proxy & Beacon
Pattern Support
State Invariants
Post-Upgrade Guarantee
benefits
SECURITY FIRST
Why Formal Verification is Critical for StarkNet
On StarkNet, where high-value assets and complex logic are the norm, formal verification is not optional. It's the only way to mathematically prove your Cairo program's correctness and eliminate entire classes of bugs before deployment.
01
Eliminate Logic & Arithmetic Bugs
We use formal methods to prove your Cairo program's logic is sound, preventing critical errors like integer overflows, underflows, and incorrect state transitions that automated tools miss.
100%
Proof Coverage
0
False Positives
02
Secure High-Value DeFi Protocols
For protocols managing liquidity pools, lending, or derivatives, we formally verify invariants and safety properties, providing mathematical certainty that user funds are protected under all conditions.
$1B+
Assets Secured
24/7
Property Monitoring
03
Accelerate Audit & Compliance
Deliver a machine-checked proof of correctness alongside your code, significantly reducing manual audit time and cost while providing irrefutable evidence for regulatory and partner due diligence.
70%
Faster Audits
Certified
Mathematical Proof
04
Future-Proof Against Upgrades
Formal specifications act as a living document. We verify that future protocol upgrades and optimizations preserve all critical security properties, preventing regression bugs.
Guaranteed
Backward Compatibility
Automated
Upgrade Validation
05
Mitigate Systemic Risk for L2s
StarkNet's security inherits from its provers. We ensure your application's proofs are correct, protecting the entire sequencer and settlement layer from faulty state transitions.
L1 Security
Inherited Guarantee
Systemic
Risk Reduced
06
Build Unshakeable User Trust
Publicly verifiable formal proofs provide the highest standard of transparency. Demonstrate provable security to users and investors, differentiating your protocol in a competitive market.
Provable
Security Marketing
Enterprise-Grade
Trust Signal
Choosing the Right Security Methodology
Formal Verification vs. Traditional Audits
A direct comparison of formal verification and manual audit approaches for Cairo smart contract security, highlighting key differences in methodology, outcomes, and investment.
| Security Factor | Traditional Manual Audit | Chainscore Formal Verification |
|---|---|---|
Methodology | Manual code review by experts | Mathematical proof of correctness |
Coverage | Sample-based (80-95% typical) | Exhaustive (100% of specified properties) |
Guarantee | High confidence, but not absolute | Mathematical proof of absence of bugs |
Time to Result | 2-4 weeks (varies by scope) | 1-3 weeks (deterministic) |
Cost Range | $15K - $50K+ | $25K - $75K+ |
Ideal For | Standard logic, initial security review | Mission-critical logic, DeFi protocols, bridges |
Output | PDF report with findings & recommendations | Verification certificate & machine-checkable proof |
Ongoing Assurance | New audit required after major changes | Proof re-verifies automatically on incremental changes |
Bug Detection | Relies on auditor skill and time | Automated, systematic for defined properties |
Regulatory Readiness | Evidence of due diligence | Provable compliance with formal specifications |
how-we-deliver
RIGOROUS & METHODICAL
Our Verification Process
We apply a structured, multi-layered approach to Cairo program verification, ensuring mathematical proof of correctness for your most critical on-chain logic. This process is designed to deliver absolute confidence and prevent costly vulnerabilities before deployment.
01
Specification & Formal Modeling
We translate your Cairo program's intended behavior into a precise, machine-readable formal specification using TLA+ or Coq. This creates the single source of truth against which all code is verified.
100%
Requirement Coverage
Zero Ambiguity
Specification Clarity
02
Automated Theorem Proving
Our experts use specialized tools like the Cairo verifier in Lean or custom SMT solvers to generate formal proofs. This mathematically confirms the program's execution matches its specification under all possible conditions.
Exhaustive
State Space Analysis
Formal Proof
Guaranteed Correctness
03
Manual Security Audit & Review
Complementing automated proofs, our senior auditors conduct line-by-line reviews focusing on Cairo-specific risks (e.g., non-determinism, hint safety, storage layout) and business logic flaws.
10+ Years
Avg. Auditor Experience
OWASP & NIST
Compliance Frameworks
04
Verification Report & Certification
Receive a comprehensive report detailing the verification methodology, proof artifacts, audit findings, and a formal certificate of verification. This document serves as critical due diligence for stakeholders and users.
Actionable
Remediation Guidance
Investor-Ready
Technical Due Diligence
Cairo Program Formal Verification
Service Specifications & Deliverables
Compare our structured verification packages designed to meet the security needs of projects at every stage, from early development to enterprise-grade production.
| Verification Feature | Starter Audit | Professional Audit | Enterprise Verification |
|---|---|---|---|
Automated Vulnerability Detection | |||
Manual Expert Review | Limited | Comprehensive | Comprehensive + Threat Modeling |
Mathematical Proof Generation | |||
Formal Specification Development | Core Functions | Full Protocol | |
Audit Report & Remediation Guide | |||
Remediation Support & Re-Verification | 1 round | 2 rounds | Unlimited (within scope) |
Response Time SLA | 72h | 24h | 4h |
Post-Audit Consultation | 1 hour | 4 hours | Dedicated Engineer |
Verification for Upgrades | |||
Starting Investment | $8,000 | $25,000 | Custom Quote |
For Technical Decision Makers
Cairo Formal Verification FAQs
Get clear, technical answers to the most common questions CTOs and engineering leads ask about formally verifying Cairo smart contracts.
Timeline: A standard verification for a core Cairo contract (e.g., an AMM pool, lending vault) typically takes 3-6 weeks, from specification to final report. Complex, multi-contract systems can take 8+ weeks.
Pricing: We work on a fixed-scope, fixed-price model. Projects range from $25,000 for a single critical function to $150,000+ for a full protocol suite. The quote is based on the Lines of Code (LoC), architectural complexity, and the number of properties to be proven.
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