We architect and deploy custom smart contracts for tokens, DeFi protocols, and NFT ecosystems. Our code is built on Solidity 0.8+ with OpenZeppelin security patterns, ensuring audit-ready quality from day one.
LABS
Services
StarkNet Cairo Payment Gateway Audit
Specialized security audit and formal verification of zk-rollup based payment gateways built with Cairo, ensuring mathematical proof of correctness for high-value transactions.
Chainscore © 2026
overview
CORE SERVICE
Smart Contract Development
Secure, production-ready smart contracts built for scale and compliance.
- Token Systems:
ERC-20,ERC-721,ERC-1155with custom minting, vesting, and governance logic. - DeFi Logic: Automated market makers (AMMs), staking pools, and yield strategies with gas optimization.
- Security First: Every contract undergoes internal review against common vulnerabilities before delivery.
We deliver contracts that are secure by design, reducing audit cycles and mitigating costly post-launch fixes.
key-features-cards
PROVEN FRAMEWORK
Our Audit Methodology for Cairo Payment Systems
Our battle-tested, multi-layered audit process is designed to secure high-value payment gateways on StarkNet, delivering actionable insights and verifiable security guarantees.
03
Manual Code Review & Logic Testing
Our senior Cairo auditors perform line-by-line manual review and logic flow analysis, focusing on business logic, access control, and payment state transitions.
100%
Manual Review
5+ years
Avg. Experience
05
Economic & MEV Analysis
We simulate adversarial market conditions to identify potential for front-running, sandwich attacks, and liquidity manipulation within your payment flow.
Real-world
Attack Vectors
Gas Cost
Optimization Report
06
Comprehensive Reporting & Remediation
Receive a detailed audit report with severity-ranked findings, actionable remediation steps, and follow-up verification to ensure all issues are resolved.
72 hrs
Report Delivery
Guaranteed
Re-audit Support
benefits
FROM AUDIT TO EXECUTION
Business Outcomes: Secure, Compliant, Fundable
A StarkNet Cairo payment gateway audit from Chainscore Labs delivers more than a security report. It provides the technical foundation for sustainable growth, investor confidence, and regulatory readiness.
01
Enterprise-Grade Security Posture
We deliver a comprehensive audit of your Cairo 1.0 payment logic, identifying critical vulnerabilities in fund flows, access control, and oracle integrations. This eliminates single points of failure and protects user assets, directly reducing the risk of catastrophic exploits that can destroy a project's reputation and treasury.
100%
Line Coverage
0 Critical
Vulnerability Guarantee
02
Regulatory & Compliance Readiness
Our audit includes a compliance-focused review of transaction logic, AML/CFT pattern detection, and data privacy considerations. We provide a clear remediation roadmap, giving your legal team and potential banking partners the technical assurance needed for compliant operations in regulated markets.
SOC 2
Framework Alignment
FATF
Travel Rule Ready
03
Investor & Due Diligence Confidence
A Chainscore audit report is a fundability asset. It provides verifiable, expert validation of your core technology, significantly de-risking the technical due diligence process for VCs and institutional investors. This accelerates funding rounds and increases valuation by proving engineering maturity.
2-4 Weeks
DD Acceleration
100+
VCs Trusted
04
Production Resilience & Uptime
We stress-test your gateway's failure modes, reorg handling, and sequencer dependency. Our recommendations ensure high availability and graceful degradation, supporting the Service Level Agreements (SLAs) required by enterprise partners and high-volume merchants.
99.9%
Uptime Design
< 2 sec
Fallback Latency
Choose the right level of security and support
StarkNet Payment Gateway Audit Tiers
Select the audit package that matches your project's scale, risk profile, and operational needs. All tiers include a comprehensive security review of your Cairo smart contracts.
| Audit Feature | Starter | Professional | Enterprise |
|---|---|---|---|
Comprehensive Cairo Smart Contract Audit | |||
Automated Vulnerability Scanning | |||
Manual Code Review & Logic Analysis | |||
Gas Optimization Report | |||
Formal Verification (Key Functions) | |||
Deployment & Configuration Review | |||
Final Audit Report & Executive Summary | PDF Report | PDF + Video Walkthrough | PDF + Video + Live Presentation |
Remediation Support & Re-audit | 1 round | 2 rounds | Unlimited rounds |
Post-Audit Consultation | 1 hour | 4 hours | Ongoing |
Priority Response Time SLA | 72 hours | 24 hours | 4 hours |
24/7 Security Monitoring & Alerting | |||
Incident Response Retainer | |||
Typical Project Scope | Single contract, < 1K LOC | Gateway suite, 1K-5K LOC | Full protocol, 5K+ LOC |
Estimated Timeline | 1-2 weeks | 2-4 weeks | 4-6 weeks |
Starting Price | $8,000 | $25,000 | Custom Quote |
process-walkthrough
CORE SERVICE
Smart Contract Development
Secure, production-ready smart contracts built to your exact specifications.
We architect and deploy custom smart contracts that form the backbone of your Web3 application. Our development process ensures security-first code and gas optimization from day one.
- From Concept to Mainnet: We handle the full lifecycle—specification, development, testing, and deployment—for
ERC-20,ERC-721,ERC-1155, and custom standards. - Built for Security: Every contract undergoes rigorous audits using static analysis, fuzzing, and formal verification methods.
- Optimized for Performance: We write gas-efficient code to minimize user transaction costs and maximize network throughput.
Deliver a battle-tested, auditable smart contract system in as little as 2-4 weeks.
tech-stack
EXPERTISE IN ACTION
Protocols & Tools We Audit
Our audit methodology is battle-tested against the core protocols and developer tools that power the StarkNet ecosystem. We deliver actionable security insights for the specific technologies you rely on.
01
Cairo Smart Contracts
In-depth security review of your custom Cairo 1.0/2.0 logic, focusing on arithmetic overflow, storage vulnerabilities, and access control patterns specific to StarkNet's VM.
100%
Line Coverage
48 hrs
Report Delivery
02
Account Abstraction (AA) Wallets
Security assessment for ERC-4337-compatible smart accounts, including paymaster integrations, signature validation, and session key management to prevent user fund loss.
Zero
Critical Findings SLA
AA-SPEC
Compliance Check
04
Oracle & Price Feed Integrations
Security validation for data oracles (e.g., Pragma, Chainlink) within payment flows, ensuring manipulation resistance and fail-safe mechanisms for critical financial data.
99.99%
Uptime Validation
3+ Sources
Redundancy Check
05
Cross-Chain Bridges & Messaging
Audit of L1<>L2 messaging layers (StarkNet Messaging) and bridge contracts, focusing on withdrawal proofs, replay protection, and economic security of locked assets.
$1B+
TVL Audited
24/7
Monitoring
06
DeFi Protocol Components
Security analysis for AMM curves, lending vaults, and staking mechanisms built on StarkNet, with stress testing for edge cases and economic model exploits.
200k+
Simulated TX
OpenZeppelin
Standards Audit
StarkNet Cairo Payment Gateway Audit
Frequently Asked Questions for Founders
Get clear, direct answers about our specialized security audit process for Cairo-based payment systems on StarkNet.
Our standard audit for a Cairo-based payment gateway takes 2-3 weeks from kickoff to final report. The scope includes a comprehensive review of your core payment logic, fee structures, token handling, withdrawal/deposit flows, and integration points with L1 Ethereum. We deliver a detailed report with severity-ranked findings, code fixes, and gas optimization recommendations.
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