We architect and deploy production-grade smart contracts that are secure by design. Our process includes formal verification and comprehensive audits before mainnet deployment, ensuring your protocol's logic is bulletproof.
LABS
Services
StarkNet Cairo ZK-Identity Library
We develop custom Cairo libraries for integrating zero-knowledge proofs into your identity flows, enabling private credential verification and attestations on StarkNet.
Chainscore © 2026
overview
CORE SERVICE
Smart Contract Development
Secure, audited smart contract development for DeFi, NFTs, and enterprise applications.
- Custom Development: Tailored
Solidity/Rustcontracts for DeFi (DEX, lending), NFTs (ERC-721A, ERC-1155), and DAOs. - Security First: Built with
OpenZeppelinstandards, tested withFoundry/Hardhat, and audited by third-party firms. - Gas Optimization: Expert-level code to minimize transaction costs and maximize user savings.
- Full Lifecycle: From design and development to deployment, verification, and ongoing maintenance.
Deliver a market-ready, audited smart contract suite in as little as 4-6 weeks, backed by a 99.9% uptime SLA for deployed contracts.
key-features-cards
ZK-IDENTITY ENGINEERING
Core Library Capabilities We Deliver
Our StarkNet Cairo library delivers production-ready, audited ZK-Identity primitives. We build the cryptographic foundation so your team can focus on application logic and user experience.
02
On-Chain Verifier Contracts
High-performance StarkNet verifier contracts for your custom ZK circuits. We ensure gas-efficient verification and seamless integration with your application's state.
04
Protocol Integration Adapters
Pre-built adapters for major identity protocols (e.g., Sismo, Polygon ID, ENS). Accelerate interoperability and reduce integration time from months to weeks.
05
Developer SDK & Tooling
Comprehensive TypeScript/Python SDKs, local development environments, and testing frameworks. Includes full documentation and example dApps.
06
Security-First Architecture
All library components are built with formal verification principles and undergo third-party audits (e.g., Nethermind, ABDK). We provide a security audit report with every delivery.
benefits
DELIVERABLES
Business Outcomes for Your Product
Our StarkNet Cairo ZK-Identity Library delivers concrete, measurable results. We focus on the technical outcomes that accelerate your roadmap and secure your competitive edge.
01
Fully Audited ZK-Circuits
Production-ready zero-knowledge circuits for identity verification, audited by leading security firms. Eliminate months of internal R&D and security review cycles.
0
Critical Vulnerabilities
Certified
Security Audit
02
Reduced Time-to-Market
Integrate private identity proofs into your StarkNet dApp in weeks, not quarters. Our modular library includes pre-built verifiers and integration templates.
< 4 weeks
Integration Time
Pre-built
Verifier Templates
03
Gas-Optimized Verification
ZK-identity verification with sub-$0.01 transaction costs on StarkNet. Our Cairo 1.0 implementations are optimized for minimal prover overhead and L1 settlement fees.
< $0.01
Avg. Verify Cost
Cairo 1.0
Optimized Code
04
Compliance-Ready Architecture
Build with privacy-by-design using ZK proofs for GDPR and regulatory compliance. Our library supports selective disclosure and proof-of-personhood patterns.
ZK-Proofs
Privacy Foundation
Selective
Disclosure Built-in
05
Scalable Identity Layer
Handle millions of identity attestations with StarkNet's vertical scaling. Our library is benchmarked for high-throughput applications like DeFi and gaming.
1M+ TPS
StarkNet Capacity
Horizontal
Scalability Path
ZK-Identity Library Integration
Structured Development Packages
Compare our tiered packages for integrating and customizing our Cairo-based ZK-Identity library, designed to match your project's security, support, and compliance needs.
| Feature / Deliverable | Starter | Professional | Enterprise |
|---|---|---|---|
Library Integration & Setup | |||
Custom ZK-Circuit Development | |||
Smart Contract Audit (External) | |||
On-Chain Deployment Support | Self-serve | Guided (2 chains) | Full-service (Multi-chain) |
Compliance & Privacy Review | Basic checklist | Detailed report | Custom framework design |
Technical Support SLA | Email (72h) | Priority Slack (24h) | Dedicated Engineer (4h) |
Library Updates & Maintenance | 6 months | 12 months | 24 months + roadmap input |
Developer Training Sessions | 2 sessions | Ongoing advisory | |
Estimated Timeline | 2-3 weeks | 4-6 weeks | 8+ weeks (custom) |
Starting Price | $25,000 | $75,000 | Custom Quote |
how-we-deliver
PROVEN METHODOLOGY
Our Development & Delivery Process
We deliver production-ready StarkNet identity solutions through a structured, transparent process designed for technical founders and CTOs who need predictable outcomes, not just prototypes.
01
Discovery & Architecture
We start with a technical deep-dive to define your identity model, data attestation sources, and Cairo circuit requirements. We deliver a detailed architecture document and project roadmap.
1-2 weeks
Scoping Sprint
100%
Requirements Locked
02
Circuit Design & Cairo Development
Our Cairo experts design and implement the core ZK circuits for identity verification, privacy-preserving proofs, and on-chain state management. All code follows StarkNet best practices.
OpenZeppelin
Security Patterns
Cairo 2.x
Latest Version
03
Security Audit & Testing
Every library undergoes rigorous internal review, formal verification of critical logic, and comprehensive unit/integration testing against the StarkNet testnet before external audit.
100%
Test Coverage
CertiK
Audit Partner
04
Deployment & Integration
We handle the mainnet deployment, configure the verifier contract, and provide integration SDKs and documentation for your frontend and backend teams to implement seamlessly.
< 72 hours
Deployment Time
Full SDK
Client Support
security
CORE SERVICE
Smart Contract Development
Secure, production-ready smart contracts built by Web3-native engineers.
We architect and deploy audit-ready smart contracts for tokens, DeFi protocols, and NFT projects. Our development process is built on Solidity 0.8+ with OpenZeppelin standards and includes comprehensive unit testing to ensure security and reliability from day one.
Deliver a secure, functional MVP in as little as 2-4 weeks, not months.
- Token Systems: Custom
ERC-20,ERC-721, andERC-1155contracts with advanced features like vesting, minting controls, and governance hooks. - DeFi & dApps: Automated Market Makers (AMMs), staking pools, lending protocols, and multi-signature wallets.
- Security First: Every contract undergoes internal peer review and is structured for seamless third-party audits by firms like CertiK or Quantstamp.
StarkNet Cairo ZK-Identity Library
Frequently Asked Questions
Get clear answers on our development process, security, and support for your identity solution.
A standard implementation with core features like credential issuance and selective disclosure takes 4-6 weeks from kickoff to mainnet deployment. Complex integrations with existing KYC systems or custom proof circuits can extend this to 8-12 weeks. We provide a detailed sprint-by-sprint roadmap during the discovery phase.
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