We architect, develop, and audit custom Solidity and Rust smart contracts that form the immutable business logic of your application. Our development process integrates OpenZeppelin standards and formal verification to ensure security and reliability from day one.
LABS
Services
Cross-Rollup Privacy Bridge Engineering
We design and build specialized bridges for confidential asset and message transfers between privacy-focused Layer 2 rollups, such as ZK-rollups and confidential Optimistic rollups.
Chainscore © 2026
overview
CORE SERVICE
Smart Contract Development
Secure, production-ready smart contracts built by Web3 experts to power your dApp.
Deliver a secure, gas-optimized foundation that your users and investors can trust.
Our full-service offering includes:
- Custom Logic: Tailored
ERC-20,ERC-721, and bespoke contract development. - Security-First: Multi-stage audits, including automated analysis and manual review.
- Gas Optimization: Code designed for minimum transaction costs and maximum efficiency.
- Full Deployment: End-to-end support from testnet to mainnet launch on your chain of choice.
We move beyond basic templates to deliver contracts engineered for real-world use, scalability, and compliance. Partner with us to transform your product specifications into robust, on-chain code with a typical MVP delivery in 2-4 weeks.
key-features-cards
ENGINEERING EXCELLENCE
Core Technical Capabilities
Our cross-rollup privacy bridge engineering is built on verifiable technical foundations, delivering secure, scalable, and interoperable solutions for institutional-grade applications.
04
Gas-Optimized Smart Contracts
Deployment of highly efficient Solidity/Vyper contracts for bridge operations, reducing user transaction costs by up to 40% through advanced optimization patterns and state management.
40%
Avg. Gas Reduction
Solidity 0.8+
Code Standard
05
End-to-End Security Audits
Comprehensive security review process including automated analysis, manual review by in-house experts, and final certification by leading firms like Trail of Bits or Quantstamp before mainnet deployment.
100%
Audit Coverage
Certified
External Review
06
Modular & Upgradeable Design
Implementation of proxy patterns and modular components (ERC-2535 Diamonds) allowing for seamless future upgrades, new rollup integrations, and feature additions without service disruption.
< 2 weeks
New Chain Integration
Zero Downtime
Upgrades
benefits
DELIVERABLES & GUARANTEES
Business Outcomes for Your Project
Our engineering focus is on delivering measurable infrastructure improvements that directly impact your product's security, speed, and market readiness. Here are the concrete outcomes you can expect.
01
Zero-Knowledge Proof Integration
We implement ZK-SNARKs or ZK-STARKs to enable private cross-rollup transactions. This ensures asset transfers and data are shielded from public ledgers, a critical feature for institutional DeFi and compliant applications.
zk-SNARKs
Proof System
< 5 sec
Proof Generation
02
Multi-Rollup Interoperability
Build a bridge that connects Arbitrum, Optimism, zkSync, and StarkNet. We handle the protocol-specific messaging and state verification, giving your users seamless asset movement across the major L2 ecosystems.
4+
Supported L2s
EVM & Cairo
VM Compatibility
03
Formally Verified Bridge Contracts
Receive core bridge smart contracts that have undergone formal verification, providing mathematical certainty of correctness for critical state transition and custody logic, beyond standard audits.
Formal Verification
Security Standard
0 Critical Bugs
Guarantee
04
Optimized Relayer Network
We deploy and manage a decentralized, incentivized relayer network for message passing. This ensures high availability, censorship resistance, and sub-30 second finality for cross-rollup transactions.
99.9%
Relayer Uptime SLA
< 30 sec
Finality Time
05
Custom Privacy Policy Engine
Integrate a configurable policy layer that enforces compliance rules (e.g., travel rule, sanctions screening) on private transactions before they are finalized, enabling regulated use cases.
On-Chain
Policy Enforcement
FATF Travel Rule
Compliance Ready
06
Production Deployment & Monitoring
We handle the full production deployment, including mainnet security audits, monitoring dashboards for bridge health, and alerting systems for anomalous activity, ensuring operational readiness from day one.
2 Weeks
To Production
24/7
Health Monitoring
Make an informed infrastructure decision
Build vs. Buy: Custom Bridge vs. Generic Solution
A detailed comparison of the time, cost, and risk involved in developing a custom cross-rollup privacy bridge in-house versus partnering with Chainscore Labs for a purpose-built solution.
| Critical Factor | Build In-House | Generic Bridge SDK | Chainscore Custom Bridge |
|---|---|---|---|
Time to Market | 6-12+ months | 2-4 months | 4-8 weeks |
Initial Development Cost | $250K - $750K+ | $50K - $150K | $75K - $200K |
Security Posture | High Risk (unaudited, novel code) | Medium Risk (audited, but generic) | Low Risk (audited, custom for your use case) |
Privacy Guarantees | Your responsibility | Limited (ZK or TEE-based only) | Tailored (ZK, TEE, or MPC as required) |
Cross-Rollup Support | Custom integration per chain | Limited to SDK's whitelist | Full (EVM, zkEVM, L2, AppChains) |
Ongoing Maintenance & Upgrades | Full team required | Vendor-dependent updates | Optional SLA with 24/7 monitoring |
Total Cost of Ownership (Year 1) | $400K - $1M+ | $100K - $250K | $125K - $300K |
Team Requirement | 5-10 senior blockchain engineers | 2-3 integration engineers | 1 technical lead for coordination |
how-we-deliver
CLIENT-CENTRIC DELIVERY
Our Engineering & Delivery Process
A structured, transparent approach to building secure, scalable cross-rollup privacy infrastructure. We deliver production-ready bridges with clear milestones and predictable outcomes.
01
Architecture & Protocol Design
We design the cryptographic and network architecture for your privacy bridge, selecting optimal zero-knowledge proof systems (zk-SNARKs/STARKs) and interoperability protocols (IBC, LayerZero).
2-4 weeks
Design Phase
3+ Options
Architecture Reviewed
02
Smart Contract & Circuit Development
Secure, auditable smart contracts (Solidity/Vyper) for bridge logic, paired with custom zero-knowledge circuits (Circom, Halo2) for private state verification across rollups.
OpenZeppelin
Security Standard
Gas-Optimized
Contract Design
03
Rigorous Security Audits
Multi-layered security review including internal audits, formal verification for critical circuits, and a final review by a top-tier third-party firm (e.g., Trail of Bits, Quantstamp).
3+ Rounds
Audit Cycles
Critical Fixes
Guaranteed Remediation
04
Testnet Deployment & Simulation
Comprehensive deployment on testnets (Sepolia, Holesky, Arbitrum Sepolia) with automated stress testing, adversarial simulations, and performance benchmarking.
> 95%
Code Coverage
Load Tested
At Scale
05
Mainnet Launch & Monitoring
Managed mainnet deployment with phased rollouts, real-time monitoring dashboards for bridge health, and 24/7 incident response protocols.
99.5% SLA
Initial Uptime
< 1 hr
Response Time
security
CORE SERVICE
Smart Contract Development
Secure, audited smart contracts built for production by Web3-native engineers.
We architect and deploy custom smart contracts on EVM-compatible chains (Ethereum, Polygon, Arbitrum) and Solana. Our development process is built for security and speed, delivering a production-ready MVP in 2-3 weeks.
We don't just write code; we engineer systems that are secure by design and ready to scale.
- Security-First Development: Code follows
OpenZeppelinstandards, undergoes internal peer review, and is prepared for third-party audits from firms likeCertiKorQuantstamp. - Full-Stack Integration: Contracts are delivered with comprehensive test suites, deployment scripts, and integration guides for your front-end.
- Protocol Specialization: Expertise in
ERC-20,ERC-721,ERC-1155, staking mechanisms, custom DEX logic, and cross-chain bridges.
Cross-Rollup Privacy Bridge Engineering
Frequently Asked Questions
Get clear answers on our development process, security standards, and delivery for your privacy-focused cross-rollup bridge.
We follow a structured 4-phase process: 1) Discovery & Architecture (1-2 weeks): We analyze your requirements and design the bridge's privacy scheme and rollup compatibility. 2) Core Development (3-6 weeks): Our engineers build the bridge smart contracts, zero-knowledge circuits (using Noir or Circom), and off-chain relayers. 3) Security & Testing (2-3 weeks): Rigorous internal audits, formal verification of ZK proofs, and testnet deployment. 4) Mainnet Launch & Support (1-2 weeks): Deployment assistance and 90 days of post-launch support. We provide weekly sprint updates and maintain a fixed-price or time-and-materials model.
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