We architect and deploy custom smart contracts on EVM and Solana that power your core business logic. Our focus is on security-first development, using audited patterns from OpenZeppelin and rigorous internal testing to mitigate risks before mainnet deployment.
LABS
Services
Cross-Chain ZK Proof System Security Audit
Specialized security review and formal verification of custom ZK circuits, verifier contracts, and cryptographic protocols designed for cross-chain communication, ensuring mathematical correctness and robustness.
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-1155, andSPLtokens with custom minting, vesting, and governance. - DeFi Protocols: Automated market makers (AMMs), liquidity pools, staking, and yield vaults.
- Enterprise Logic: Multi-signature wallets, access control, and compliant asset management modules.
- Gas Optimization: Code written for efficiency, reducing user transaction costs by up to 40%.
From initial audit to final deployment, we ensure your contracts are battle-tested and maintainable. We provide full documentation and a deployment package ready for your team or our ongoing managed services.
key-features-cards
PROVEN PROCESS
Our ZK Security Audit Methodology
Our systematic, multi-layered approach de-risks your cross-chain ZK proof system, ensuring mathematical correctness, implementation security, and production readiness.
01
Architectural & Cryptographic Review
We analyze the system's high-level design, threat model, and the underlying ZK-SNARK/STARK protocols for soundness and completeness. This includes verifying circuit logic, trusted setup assumptions, and cryptographic primitives.
100%
Circuit Logic Coverage
Formal
Proof Verification
02
Smart Contract & Integration Audit
In-depth manual and automated review of on-chain verifier contracts, cross-chain messaging layers (e.g., LayerZero, Axelar), and integration points. We focus on reentrancy, access control, and logic flaws in the verification flow.
OZ Standards
Security Patterns
Gas Optimization
Included
03
Circuit Implementation Analysis
Line-by-line review of the ZK circuit code (Circom, Halo2, Cairo) for constraint correctness, under-constrained signals, and side-channel vulnerabilities. We ensure the circuit faithfully represents the intended computation.
Zero-Knowledge
Property Checks
Side-Channel
Resistance Audit
04
Prover & Trusted Setup Security
Assessment of the proving system's implementation for memory safety, denial-of-service vectors, and potential trusted setup ceremony compromises. We evaluate the security of the entire proof generation pipeline.
Ceremony Audit
Optional
Memory-Safe
Code Review
05
Formal Verification & Fuzzing
Employing advanced techniques like symbolic execution and differential fuzzing to mathematically prove security properties and discover edge-case failures in complex state transitions and proof verification.
Property-Based
Testing
Symbolic Execution
Applied
06
Remediation & Final Certification
We provide a prioritized vulnerability report with actionable fixes and proof-of-concept exploits. Follow-up review ensures all issues are resolved before issuing a final security certification for your system.
Detailed POCs
For Critical Issues
Public Report
Optional
benefits
THE DIFFERENCE
Why a Specialized ZK Audit is Critical
Generic smart contract audits miss the unique complexities of zero-knowledge cryptography and cross-chain logic. Our specialized approach isolates the critical vulnerabilities that matter.
01
Cryptographic Protocol Review
We audit the core ZK-SNARK or STARK proving system, circuit logic, and trusted setup assumptions for soundness and completeness, preventing fundamental protocol failures.
100%
Circuit Coverage
O(1)
Proof Verification
02
Cross-Chain State Consistency
We verify the integrity of state proofs as they bridge between chains, ensuring no double-spends, replay attacks, or consensus failures across heterogeneous networks.
0
State Gaps
< 2 sec
Finality Check
03
Gas & Performance Optimization
We analyze and optimize on-chain verifier contracts for extreme gas efficiency and proof verification speed, directly reducing your end-users' transaction costs.
40-70%
Gas Reduction
Sub-second
Verification
04
Adversarial Test Net Deployment
We deploy your system to a private testnet and execute coordinated attack simulations, including front-running and MEV extraction, under real-world conditions.
50+
Attack Vectors
Live
Simulation
Choose Your Security Audit Package
Comprehensive Audit Deliverables & Timeline
A detailed comparison of our audit packages for cross-chain ZK proof systems, from core code review to full-scale enterprise security.
| Audit Component | Starter | Professional | Enterprise |
|---|---|---|---|
ZK Circuit & Smart Contract Audit | |||
Cross-Chain Bridge Logic Review | |||
Formal Verification (ZK-SNARKs/STARKs) | |||
Gas Optimization & Cost Analysis | |||
Post-Audit Remediation Support | 1 round | 3 rounds | Unlimited |
Final Report & Executive Summary | |||
Time to Completion | 2-3 weeks | 3-4 weeks | 4-6 weeks |
Response Time SLA | 72h | 24h | 4h |
Ongoing Security Monitoring | |||
Starting Price | $25,000 | $75,000 | Custom Quote |
Why Specialization Matters for ZK Systems
Chainscore vs. Generalist Audit Firms
Cross-chain ZK proof systems require deep, specialized expertise. This comparison highlights the critical differences between our focused audit service and generalist firms.
| Audit Dimension | Generalist Firm | Chainscore Labs |
|---|---|---|
ZK Circuit & Proof System Review | ||
Cross-Chain Bridge & Messaging Logic | Surface-level | In-depth (State, Fraud, Validity Proofs) |
Cryptographic Primitive Analysis (e.g., PLONK, Groth16) | Limited | Core Expertise |
Gas Optimization for ZK-Verifier Contracts | ||
Formal Verification for Custom ZK Opcodes | ||
Adherence to ZK-Specific Standards (e.g., EIPs) | Basic | Advanced |
Audit Report Remediation Support | Document only | Guided Implementation |
Post-Audit Consultation on Upgrades | Optional add-on | Included for 90 days |
Typical Engagement Timeline | 3-4 weeks | 2-3 weeks (accelerated) |
Average Project Cost | $25K - $75K+ | $40K - $100K+ (Specialized Value) |
process-walkthrough
CORE SERVICE
Smart Contract Development
Secure, production-ready smart contracts built by Web3 experts.
We architect, develop, and audit custom Solidity/Rust contracts that form the backbone of your protocol. Our focus is on security-first development using battle-tested patterns from OpenZeppelin and rigorous internal audits.
- Custom Logic: DeFi primitives, NFT mechanics, DAO governance, and bespoke business logic.
- Gas Optimization: Code reviewed for up to 40% lower execution costs.
- Full Audit Trail: Comprehensive testing suite and documentation for
Etherscanverification. - Mainnet Deployment: Managed deployment and verification on Ethereum, Polygon, Arbitrum, and other EVM/L1 chains.
We deliver contracts you can stake your business on, with a proven track record of zero critical vulnerabilities in production deployments.
Security & Process
Frequently Asked Questions on ZK Proof Audits
Get clear answers on our methodology, timeline, and what to expect from a Chainscore security audit for your cross-chain ZK system.
We employ a multi-layered methodology: 1. Manual Code Review: In-depth line-by-line analysis of ZK circuits (Circom, Halo2, Noir), cross-chain messaging contracts, and state management logic by senior auditors. 2. Formal Verification: We use tools like Certora and K-framework to mathematically prove critical properties of your system. 3. Differential Fuzzing: We run custom fuzzers (Echidna, Foundry) against your implementation and a reference model to uncover edge cases. 4. Threat Modeling: We map out attack vectors specific to cross-chain state transitions and trusted setup assumptions. This process has secured over $500M in TVL across 50+ ZK projects.
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