We architect and deploy custom smart contracts for tokens, DeFi protocols, and NFTs. Our engineers specialize in Solidity 0.8+, Rust, and Vyper, implementing OpenZeppelin standards and gas-optimized patterns from day one.
LABS
Services
Private DeFi Transaction Circuit Audit
Specialized security assessment of ZK-SNARK and ZK-STARK circuits for private DeFi protocols. We verify the correctness of hidden financial logic and prevent value leakage in swaps, loans, and liquidity provision.
Chainscore © 2026
overview
CORE SERVICE
Smart Contract Development
Secure, production-ready smart contracts built by Web3-native engineers.
Deliver a secure, auditable foundation for your protocol in 2-4 weeks.
- Full Lifecycle Development: From specification and
Hardhat/Foundrytesting to mainnet deployment and verification. - Security-First Approach: Rigorous internal review, formal verification tools, and preparation for third-party audits from firms like Trail of Bits or CertiK.
- Protocol-Specific Expertise:
ERC-20,ERC-721,ERC-1155, Automated Market Makers (AMMs), staking vaults, and governance systems.
key-features-cards
PROVEN PROCESS
Our Circuit Audit Methodology
Our systematic, multi-layered approach ensures your private transaction circuits are mathematically sound, secure, and production-ready. We deliver actionable reports, not just a checklist.
benefits
SECURITY FIRST
Why a Specialized ZK Circuit Audit is Critical
Standard smart contract audits miss the unique cryptographic vulnerabilities in zero-knowledge circuits. Our specialized process delivers the mathematical rigor and protocol-specific expertise required to secure your Private DeFi transactions.
01
Mathematical Proof Verification
We formally verify the soundness and completeness of your zk-SNARK or zk-STARK circuits, ensuring the cryptographic proofs are mathematically correct and cannot be forged.
100%
Proof Soundness Check
Plonk, Groth16
Protocols Audited
02
Circuit Logic & Constraint Analysis
Deep audit of the R1CS or Plonkish arithmetization to identify logic flaws, under-constrained systems, and incorrect business rule implementations that could leak data or funds.
Zero-Knowledge
Property Preservation
Circom, Halo2
Framework Expertise
03
Side-Channel & Oracle Risk Assessment
Identify vulnerabilities where circuit inputs or proving keys could leak sensitive user data, and audit dependencies on external oracles for manipulation risks.
Privacy Leak
Vulnerability Detection
Trusted Setup
Ceremony Review
04
Gas & Proving Cost Optimization
Analyze and recommend optimizations to reduce the computational complexity of your circuits, directly lowering end-user proving costs and improving scalability.
Up to 40%
Cost Reduction
Prover/Verifier
Efficiency Audit
05
Integration & Adversarial Testing
Test the full integration of your circuit with on-chain verifiers and off-chain provers, simulating adversarial attacks on the complete transaction flow.
End-to-End
System Test
EVM, Solana
Chain Compatibility
06
Compliance-Ready Audit Report
Receive a detailed, actionable report with CVSS-scored vulnerabilities, proof-of-concept exploits, and remediation guidance to satisfy investor and regulatory due diligence.
72h
Remediation Support
CertiK, Spearbit
Report Standards
Why a ZK-Specific Audit is Critical for Private DeFi
Audit Depth: Generic Smart Contract vs. Specialized ZK Circuit
Standard smart contract audits miss critical vulnerabilities in zero-knowledge circuits. This table compares the scope and rigor of a generic audit versus our specialized ZK circuit audit service designed for private transaction protocols.
| Audit Dimension | Generic Smart Contract Audit | Specialized ZK Circuit Audit |
|---|---|---|
ZK-Specific Vulnerability Coverage | ||
Arithmetic Circuit Logic Review | Surface-level | Full formal verification |
Cryptographic Primitive Validation | Not reviewed | Elliptic curve, hashing, commitment schemes |
Prover & Verifier Contract Integration | Basic interface check | End-to-end soundness & trust assumptions |
Gas Optimization for ZK Operations | General recommendations | Circuit-specific opcode & constraint optimization |
Audit Report Depth | ~50 pages | ~150+ pages with formal proofs |
Remediation Support for ZK Bugs | Limited guidance | Expert remediation with circuit redesign |
Time to Completion | 2-3 weeks | 4-6 weeks |
Typical Engagement Cost | $15K - $50K | $75K - $200K+ |
Recommended For | Standard DApps, Tokens | Private DEXs, L2s, Identity Protocols |
Transparent Scope & Pricing
Audit Deliverables & Standard Timeline
A clear breakdown of our Private DeFi Transaction Circuit audit packages, detailing deliverables, support levels, and typical timelines to secure your protocol.
| Audit Component | Starter | Professional | Enterprise |
|---|---|---|---|
Smart Contract Security Audit | |||
Circuit Logic & ZK-SNARK/STARK Review | |||
Gas Optimization Report | |||
Formal Verification (Where Applicable) | |||
Deployment & Integration Support | |||
Post-Audit Threat Monitoring (30 Days) | |||
Remediation Re-Audit | 1 round | 2 rounds | Unlimited rounds |
Average Turnaround Time | 10-14 business days | 7-10 business days | 5-7 business days |
Priority Support Response SLA | 48 hours | 12 hours | 4 hours |
Typical Investment | $15,000 - $25,000 | $40,000 - $75,000 | Custom Quote |
process-walkthrough
CORE SERVICE
Smart Contract Development
Secure, production-ready smart contracts built for scale and compliance.
We architect and deploy custom Solidity and Rust smart contracts with enterprise-grade security. Every contract undergoes formal verification and third-party audits from firms like CertiK and Quantstamp before mainnet deployment.
- Custom Logic: Tailored
ERC-20,ERC-721, andERC-1155tokens, DeFi protocols, DAOs, and NFT marketplaces. - Security First: Development follows OpenZeppelin standards with comprehensive unit and integration testing.
- Gas Optimization: Contracts are optimized for up to 40% lower gas costs and predictable execution.
- Full Lifecycle: We handle deployment, upgradeability patterns (
Proxy/Beacon), and on-chain monitoring.
Deploy a fully audited, gas-optimized smart contract suite in under 4 weeks, from specification to mainnet readiness.
Private DeFi Transaction Circuit Audit
Frequently Asked Questions
Get clear answers about our specialized security audit process for private transaction circuits in DeFi.
Our standard audit engagement for a private transaction circuit (e.g., zk-SNARKs, zk-STARKs, FHE) takes 3-5 weeks. This includes a 1-week scoping phase, 2-3 weeks for in-depth analysis and testing, and a final week for report generation and remediation review. Complex, multi-circuit systems may extend this timeline, which we define 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