We architect, develop, and audit custom Solidity and Rust smart contracts that form the unbreakable backbone of your Web3 application. Our code is built for security first, leveraging battle-tested libraries like OpenZeppelin and following industry best practices to mitigate risks.
LABS
Services
Privacy-Focused NFT Circuit Design
We design and implement custom zero-knowledge circuits for NFTs, enabling confidential ownership, private metadata, and hidden traits. Build private collectibles, undisclosed art, and gated access applications on-chain.
Chainscore © 2026
overview
CORE SERVICE
Smart Contract Development
Secure, production-ready smart contracts for DeFi, NFTs, and enterprise applications.
- Full Lifecycle Development: From initial concept and technical design to deployment, verification, and ongoing maintenance on EVM (
Ethereum,Polygon,Arbitrum) and non-EVM (Solana,Aptos) chains. - Security-First Approach: Every contract undergoes rigorous internal review and is prepared for third-party audits by firms like
CertiKorQuantstamp. - Gas Optimization: We write efficient code to minimize transaction costs for your users, a critical factor for adoption and scalability.
Deliver a secure, audited, and gas-optimized smart contract suite in as little as 4-6 weeks, reducing your technical risk and accelerating your path to mainnet.
key-features-cards
ENGINEERED FOR PRIVACY
Core Capabilities of Our ZK NFT Circuit Service
We design and implement custom zero-knowledge circuits that enable private, verifiable, and scalable NFT applications. Our service delivers production-ready circuits with proven security and performance.
01
Custom Private NFT Minting
Design and implement ZK circuits for confidential NFT creation. Hide sensitive metadata, creator identity, and minting logic while proving validity on-chain. Enables private collections and membership passes.
Circom 2.1+
Framework
Plonk / Groth16
Proof Systems
02
Selective Disclosure & Proofs
Build circuits that allow NFT holders to prove specific attributes (e.g., ownership tier, traits) without revealing the entire token or wallet address. Essential for gated experiences and anonymous verification.
< 500ms
Proof Generation
ERC-721/1155
Standards
03
Private NFT Trading & Transfers
Implement ZK-powered dark pools and OTC mechanisms. Enable confidential bids, asks, and settlements where trade details and counterparties remain hidden, protecting market strategies.
zk-SNARKs
Technology
Audited
Security
04
Gas-Optimized Verifier Contracts
Deploy highly efficient Solidity verifier contracts tailored to your circuit logic. We optimize for minimal on-chain gas costs, critical for mainnet deployment and user adoption.
~200k gas
Avg. Verify Cost
Solidity 0.8+
Language
05
Full Audit & Security Review
Every circuit undergoes rigorous manual review and automated testing for logical soundness and cryptographic security. We provide a comprehensive audit report for your team and stakeholders.
2+ Auditors
Per Review
Formal Spec
Deliverable
06
Integration & Developer Support
We deliver a complete integration package: circuit files, verifier contracts, TypeScript/JavaScript SDKs, and documentation. Get from prototype to production with our technical guidance.
2-4 Weeks
Typical Timeline
Full SDK
Included
use-cases
PRIVATE BY DESIGN
Applications for Confidential NFT Circuits
Our confidential NFT circuits enable new business models and enhanced user experiences by embedding privacy directly into the token logic. Move beyond public metadata to build compliant, competitive, and secure digital assets.
01
Private Art & Collectibles
Enable confidential sales, private ownership transfers, and hidden metadata for high-value digital art. Protect collector identities and transaction histories while maintaining verifiable provenance on-chain.
ZK-SNARKs
Privacy Tech
ERC-721/1155
Standards
02
Membership & Gated Access
Create verifiable, private membership tokens for exclusive communities, events, or content. Prove eligibility without revealing member identity or wallet history, ensuring true exclusivity.
Selective Reveal
Access Control
Soulbound
Token Type
03
Confidential Gaming Assets
Build games with hidden item stats, undisclosed player inventories, and private in-game economies. Prevent front-running and data scraping to preserve competitive integrity and asset value.
< 100ms
Proof Gen
Plonk / Groth16
Proof Systems
04
Enterprise Tokenization
Tokenize sensitive assets like intellectual property, financial instruments, or supply chain data with enforceable privacy. Share selective proofs for compliance (KYC/AML) without exposing underlying data.
Audit Trail
Compliance
Role-Based
View Permissions
05
Private Identity & Credentials
Issue self-sovereign identity tokens, verifiable credentials, and attestations with zero-knowledge proofs. Users control disclosure, enabling private verification for DeFi, voting, or access rights.
W3C VC
Standard
Selective Disclosure
Core Feature
06
Royalty & Revenue Sharing
Implement confidential, automated royalty streams and profit-sharing agreements. Enforce terms and distribute payments privately, protecting business relationships and financial terms.
Programmable
Logic
Immutable Terms
On-Chain
benefits
DELIVERABLES
Business Outcomes for Your Project
Our privacy-focused NFT circuit design service delivers concrete, auditable results that protect your assets and accelerate your roadmap. We focus on verifiable security and measurable performance.
02
Gas-Optimized Private Minting
We design circuits that reduce the computational overhead of privacy operations, cutting minting and transfer gas costs by up to 40% compared to generic implementations. This makes privacy economically viable at scale.
≤ 40%
Gas Reduction
04
Regulatory-Compliant Privacy
We architect selective disclosure mechanisms, allowing authorized parties (e.g., auditors, regulators) to view concealed data via cryptographic keys, ensuring compliance without compromising user privacy.
05
Cross-Chain Privacy Bridges
We design circuits that enable the private transfer of NFT provenance and attributes across EVM and non-EVM chains (e.g., Solana, Starknet), preserving privacy guarantees throughout the asset's lifecycle.
06
Audit-Ready Code & Documentation
We deliver comprehensive technical specifications, circuit diagrams, and inline documentation that streamline third-party security audits from firms like Trail of Bits or Quantstamp, reducing review time by weeks.
2-3 weeks
Faster Audit Cycle
Structured for Project Scale
ZK NFT Circuit Development Tiers
Compare our service packages for privacy-focused NFT circuit design, from initial proof-of-concept to enterprise-grade production systems.
| Feature / Deliverable | Starter | Professional | Enterprise |
|---|---|---|---|
Custom ZK Circuit Design | |||
Circom 2.0+ Implementation | |||
Smart Contract Integration | Basic (Mint/Transfer) | Full Suite (Mint/Burn/Trade) | Full Suite + Admin Controls |
Zero-Knowledge Proof System | Groth16 | Plonk or Groth16 | Plonk with Custom Gates |
Security Audit Scope | Circuit Logic Review | Full Circuit + Contract Audit | Full Audit + Formal Verification |
Performance Optimization | Standard | Gas & Proof Size Optimized | Gas, Size & Prover Time Optimized |
Deployment Support | Mainnet Only | Multi-Chain (2 Networks) | Multi-Chain + Custom Testnet |
Ongoing Maintenance & Updates | 3 Months | 12 Months | 24 Months with SLA |
Developer Support Response | Email (72h) | Priority Slack (24h) | Dedicated Engineer (4h) |
Typical Timeline | 4-6 Weeks | 8-12 Weeks | 12-16 Weeks |
Starting Price | $25,000 | $75,000 | Custom Quote |
how-we-deliver
CORE SERVICE
Smart Contract Development
Secure, production-ready smart contracts built for scale and compliance.
We architect and deploy custom smart contracts on EVM and Solana that are audit-ready from day one. Our development process integrates security-first patterns from OpenZeppelin and formal verification to mitigate risks before the first line of code is written.
From tokenomics to complex DeFi logic, we translate your business requirements into gas-efficient, upgradeable code.
- Standard & Custom Tokens:
ERC-20,ERC-721,ERC-1155, and bespoke implementations with minting, vesting, and governance modules. - DeFi & dApp Logic: Automated Market Makers (AMMs), staking pools, lending protocols, and multi-signature wallets.
- Full Lifecycle Support: Development, testing on
Hardhat/Foundry, deployment, and post-launch maintenance with 99.9% uptime SLAs.
Privacy-Focused NFT Circuit Design
Frequently Asked Questions
Get clear answers on our process, security, and delivery for custom zero-knowledge NFT circuits.
A standard privacy-focused NFT circuit (e.g., a shielded transfer or selective reveal mechanism) takes 4-8 weeks from specification to audit-ready delivery. Complex projects with novel logic or multi-asset support can extend to 12+ weeks. We provide a detailed project plan with milestones after the initial 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