We architect and deploy custom smart contracts for tokens, DeFi protocols, and NFTs. Our development process is built on audited security patterns and gas-optimized code to ensure reliability and cost-efficiency from day one.
LABS
Services
Privacy-Preserving Cross-Chain NFT Transfers
Chainscore delivers custom bridge infrastructure using zero-knowledge proofs to enable private, verifiable NFT transfers across Ethereum, Solana, and other major chains.
Chainscore © 2026
overview
CORE INFRASTRUCTURE
Smart Contract Development
Secure, production-ready smart contracts built by Web3 specialists.
- Token Standards:
ERC-20,ERC-721,ERC-1155, and custom implementations. - DeFi & DAOs: Automated market makers, staking pools, governance modules.
- Security First: Code reviews, formal verification, and integration with
OpenZeppelinlibraries. - Full Lifecycle: From audit-ready development to mainnet deployment and monitoring.
Deliver a secure, scalable foundation for your Web3 product in as little as 2-4 weeks.
key-features-cards
ENGINEERED FOR PRIVACY AND INTEROPERABILITY
Core Technical Capabilities
Our infrastructure delivers the cryptographic guarantees and cross-chain messaging required for secure, private NFT transfers, built on verifiable protocols and audited code.
03
Audited Smart Contract Architecture
Every privacy-preserving bridge and wrapper contract is built with Solidity 0.8+ and OpenZeppelin libraries, then audited by third-party security firms. We provide the audit report upon delivery.
100%
Contracts Audited
0 Critical
Audit Findings
04
Gas-Optimized Transaction Relaying
Our relayer network batches and subsidizes transactions to abstract gas fees from end-users, reducing the cost of private cross-chain transfers by up to 40% compared to manual execution.
40%
Cost Reduction
< 5 min
Avg. Relay Time
05
Modular Privacy SDK
Integrate privacy features into your existing dApp with our TypeScript SDK. It handles proof generation, chain abstraction, and wallet connectivity, cutting integration time from months to weeks.
< 3 weeks
Integration Time
EVM + Solana
Chain Support
06
Real-Time Monitoring & Alerts
Get full visibility into bridge health, proof verification success rates, and cross-chain message queues with our dashboard and PagerDuty/Slack integrations for instant incident response.
99.95%
Uptime SLA
< 60 sec
Alert Latency
benefits
DELIVERABLES
Business Outcomes for Your Project
Our privacy-preserving cross-chain NFT transfer service delivers measurable results, from accelerated time-to-market to enhanced user trust and security.
01
Faster Time-to-Market
Deploy a production-ready, privacy-first NFT bridge in under 4 weeks. We provide a fully integrated solution with custom smart contracts, relayers, and front-end SDKs.
< 4 weeks
Deployment Time
Pre-audited
Contract Templates
02
Enhanced User Privacy & Security
Implement zero-knowledge proofs (zk-SNARKs) to shield transaction metadata. All core contracts undergo formal verification and audits by firms like Spearbit or CertiK.
zk-SNARKs
Privacy Layer
Formal Verification
Security Standard
03
Reduced Operational Complexity
We manage the cross-chain messaging layer (Wormhole, Axelar, LayerZero) and validator infrastructure, providing a 99.9% uptime SLA so you can focus on your core product.
99.9%
Uptime SLA
Managed Relayers
Infrastructure
04
Seamless Multi-Chain User Experience
Enable single-click NFT transfers between Ethereum, Solana, and Polygon with gas abstraction. Our SDKs handle wallet detection, fee estimation, and transaction status.
3+ Chains
Native Support
< 60 sec
Average Transfer Time
05
Future-Proof Architecture
Built with modular, upgradeable contracts (using proxies) and standard interfaces (ERC-721, Metaplex). Easily integrate new chains or privacy techniques as protocols evolve.
Upgradeable
Smart Contracts
ERC-721
Compliance Standard
06
Proven Implementation Track Record
Leverage our experience from deploying cross-chain systems for leading NFT marketplaces and gaming studios, ensuring battle-tested reliability and best practices.
10+
Live Deployments
$100M+
Secured Volume
Strategic Infrastructure Decision
Build vs. Buy: Custom ZK Bridge vs. Generic Public Solutions
A detailed comparison of developing a custom ZK-powered NFT bridge in-house versus using a generic public bridge, highlighting the operational, financial, and security trade-offs for Web3 projects.
| Key Factor | Build In-House | Generic Public Bridge | Chainscore Custom ZK Bridge |
|---|---|---|---|
Time to Market | 6-12+ months | Immediate | 4-8 weeks |
Upfront Development Cost | $250K - $750K+ | $0 | $50K - $200K |
Protocol-Level Privacy | Customizable | None (Public) | ZK-SNARKs/STARKs |
Security & Audit Burden | High (Your Risk) | High (Shared Risk) | Low (Audited & Insured) |
Custom Logic & Compliance | Full Control | None | Tailored (AML/KYC Hooks) |
Ongoing Maintenance & Updates | Your Engineering Team | Bridge Operator | Optional SLA Included |
Gas Fee Optimization | Your Responsibility | Fixed by Protocol | Optimized per Chain |
Settlement Finality | Custom (2-12 secs) | 10 mins - 7 days | < 2 seconds |
Total Cost of Ownership (Year 1) | $300K - $900K+ | $10K - $50K (Fees) | $75K - $250K |
how-we-deliver
TRANSPARENT & SECURE
Our Development Process
A battle-tested, four-phase methodology designed to deliver secure, scalable, and production-ready privacy-preserving NFT bridges. We focus on technical excellence and clear communication to ensure your project launches on time and within spec.
01
Architecture & Protocol Design
We design a custom cross-chain architecture, selecting the optimal privacy primitives (ZKPs, TEEs) and bridge protocols (IBC, Axelar, Wormhole) for your specific use case. This phase establishes the security model and technical foundation.
2-3 weeks
Design Phase
3+ Options
Architecture Reviewed
02
Smart Contract & ZKP Development
Our engineers develop and audit the core smart contracts for minting/burning and the zero-knowledge circuits or trusted execution logic that enables private state verification across chains. Built with Solidity 0.8+ and frameworks like Circom or Halo2.
OpenZeppelin
Security Standards
Gas-Optimized
Contract Design
03
Relayer & Infrastructure Build
We deploy the off-chain relayer infrastructure that securely listens to events, generates proofs, and submits cross-chain messages. This includes high-availability node setups, monitoring, and failover systems on AWS/GCP.
99.9% SLA
Relayer Uptime
< 2 sec
Message Relay
04
Security Audit & Production Launch
The complete system undergoes rigorous internal review and a formal audit by a leading third-party firm like Trail of Bits or Quantstamp. We then manage the mainnet deployment, including multi-sig setup and ongoing monitoring.
Third-Party
Security Audit
Full Support
Go-Live Handoff
From Architecture to Mainnet
Typical 10-Week Project Timeline
A structured delivery plan for implementing privacy-preserving cross-chain NFT transfers, ensuring predictable milestones and clear deliverables.
| Phase & Milestone | Duration | Key Deliverables | Client Involvement |
|---|---|---|---|
Phase 1: Architecture & Design | 2 weeks | Technical specification document, Privacy model design (ZK or TEE), Chain selection analysis | Requirements workshop, Final spec sign-off |
Phase 2: Core Protocol Development | 3 weeks | Zero-knowledge circuits or TEE modules, Core bridging smart contracts, On-chain verifier deployment | Weekly technical syncs, Test environment access |
Phase 3: Integration & UI/API | 3 weeks | Wallet connector SDK, Admin dashboard (mint/bridge/burn), Public API for 3rd-party integration | UI/UX feedback sessions, Staging environment testing |
Phase 4: Security & Testing | 1 week | Internal audit report, Testnet deployment on 2+ chains, Load & edge-case testing suite | User acceptance testing (UAT), Bug bounty program setup |
Phase 5: Launch & Handover | 1 week | Mainnet deployment, Production monitoring dashboard, Technical documentation & runbooks | Go/No-Go decision, Final knowledge transfer session |
Total Project Timeline | 10 weeks | Fully audited, production-ready cross-chain privacy system | Structured collaboration at each phase |
Privacy-Preserving Cross-Chain NFT Transfers
Frequently Asked Questions
Get clear answers on how we deliver secure, private NFT bridges for your project.
We implement a multi-layered privacy architecture. Core transfers use zero-knowledge proofs (ZK-SNARKs via Circom) to validate ownership and state changes without revealing token metadata or sender/receiver details on the public chain. We combine this with secure multi-party computation (MPC) for threshold signatures and utilize private mempools or encrypted state channels for transaction batching, ensuring end-to-end privacy from initiation to finalization.
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