We architect and deploy production-grade smart contracts that power your token, DeFi protocol, or NFT platform. Our focus is on security-first development, gas optimization, and future-proof architecture.
LABS
Services
Cross-Chain NFT Marketplace Bridge
Specialized bridges for NFTs that preserve metadata, provenance, and royalty structures when moving digital collectibles between blockchain ecosystems.
Chainscore © 2026
overview
CORE SERVICE
Smart Contract Development
Secure, audited smart contracts built for production by expert Solidity engineers.
- Custom Logic: Build
ERC-20,ERC-721,ERC-1155, or bespoke contracts for DeFi, DAOs, and marketplaces. - Security Audits: Every contract undergoes internal review and is prepared for third-party audits from firms like OpenZeppelin or CertiK.
- Gas Efficiency: Optimized code to reduce user transaction costs by up to 40% versus unaudited templates.
Deploy a secure, audited MVP in as little as 2 weeks, with a 99.9% uptime SLA for mainnet deployments.
Our engineers use Solidity 0.8+, Hardhat/Foundry, and OpenZeppelin Libraries to deliver contracts you can trust to handle real value.
key-features-cards
ENGINEERED FOR SCALE
Core Technical Capabilities
Our bridge infrastructure is built on battle-tested protocols and security-first engineering, delivering the reliability and performance your marketplace demands.
01
Secure Asset Locking & Minting
We implement secure, audited smart contracts for asset custody on the source chain and deterministic minting on the destination chain. Our architecture prevents double-spending and ensures 1:1 asset representation.
Zero
Exploits Since Launch
OpenZeppelin
Security Standard
02
Multi-Chain Protocol Integration
Seamless integration with major bridging protocols (LayerZero, Axelar, Wormhole) and direct RPC connections. We handle the complexity of chain-specific logic and gas management for you.
10+
Supported Chains
< 3 min
Avg. Bridge Time
03
Gas Optimization Engine
Proprietary fee estimation and batching logic minimizes transaction costs for end-users. Dynamic gas pricing adapts to network congestion, reducing failed transactions by over 95%.
40-60%
Gas Savings
> 95%
Tx Success Rate
04
Real-Time State Synchronization
Low-latency indexers and event listeners maintain real-time consistency of NFT metadata, ownership, and collection data across all connected chains, eliminating stale data issues.
< 2 sec
Sync Latency
99.9%
Data Accuracy
05
Enterprise-Grade Monitoring
24/7 monitoring of bridge health, transaction queues, and security events with automated alerts. Full audit trails and dashboards provide operational transparency.
24/7
Monitoring
99.9% SLA
Uptime
06
Custom Bridging Logic
Tailor bridge behavior for your marketplace: royalty enforcement, collection-specific rules, whitelisted destinations, and custom fee structures. We code to your business requirements.
2-4 weeks
Custom Build
Full Audit
Included
benefits
TANGIBLE RESULTS
Business Outcomes for Your Marketplace
Our cross-chain bridge engineering delivers measurable improvements to your marketplace's performance, security, and growth potential.
01
Expanded Liquidity & User Base
Unlock capital and collectors from Ethereum, Solana, Polygon, and other major chains. Increase your Total Addressable Market (TAM) by 5-10x without fragmenting your core platform.
5-10x
Potential TAM Increase
> 10 Chains
Supported Networks
02
Reduced Transaction Friction
Enable seamless NFT transfers with gas-efficient bridging, minimizing user drop-off. Our optimized contracts reduce bridging costs by up to 40% compared to generic solutions.
Up to 40%
Cost Reduction
< 3 min
Avg. Bridge Time
03
Enterprise-Grade Security & Uptime
Deploy with confidence. Our bridge architecture is built with formal verification patterns and undergoes rigorous third-party audits (e.g., CertiK, Halborn).
99.9%
Uptime SLA
Zero
Critical Vulnerabilities
04
Faster Time-to-Market
Leverage our battle-tested bridge modules and SDKs. Go from concept to a production-ready, multi-chain marketplace in 4-6 weeks, not quarters.
4-6 weeks
To Production
Pre-Audited
Core Modules
05
Future-Proof Architecture
Our modular design allows easy integration of new L2s and emerging chains (e.g., zkSync, Base, Arbitrum). Stay ahead of ecosystem shifts without costly re-engineering.
Modular
Design
< 2 weeks
New Chain Integration
06
Enhanced Royalty Enforcement
Maintain creator revenue streams across chains. Our bridge logic preserves and enforces royalty metadata, ensuring sustainable marketplace economics.
100%
Royalty Preservation
On-Chain
Verification
Structured Roadmap for Cross-Chain NFT Marketplace Integration
Phased Development Tiers
Choose the right implementation path for your NFT marketplace's cross-chain bridge, from foundational security to full-scale enterprise deployment.
| Feature / Specification | Starter (Audit & Deploy) | Professional (Managed Launch) | Enterprise (Full-Service) |
|---|---|---|---|
Cross-Chain Bridge Smart Contract Audit | |||
Deployment to 2 Primary Chains (e.g., Ethereum, Polygon) | |||
Multi-Chain NFT Lock/Mint & Burn/Mint Logic | |||
Gas-Optimized Relayer Setup | |||
24/7 Bridge Monitoring & Alerting Dashboard | |||
Incident Response Time SLA | Best Effort | 8 Business Hours | 1 Hour |
Ongoing Maintenance & Protocol Upgrades | Optional Add-on | ||
Custom Fee Model & Treasury Integration | |||
Dedicated Technical Account Manager | |||
Estimated Timeline | 3-4 Weeks | 6-8 Weeks | 10-12 Weeks |
Starting Price | $25,000 | $75,000 | Custom Quote |
how-we-deliver
PROVEN METHODOLOGY
Our Development Process
A systematic, security-first approach to deliver a production-ready cross-chain NFT bridge in 8-12 weeks, minimizing technical risk and accelerating your time-to-market.
01
Discovery & Architecture Design
We conduct a deep technical analysis of your target chains (e.g., Ethereum, Polygon, Solana) and NFT standards to design a gas-efficient, secure bridge architecture. This phase defines the smart contract framework, tokenomics for bridge fees, and the final user flow.
1-2 weeks
Phase Duration
3+ chains
Architecture Review
02
Smart Contract Development & Auditing
Our engineers develop the core bridge contracts (lock-mint, burn-mint) in Solidity/Vyper or Rust, implementing battle-tested security patterns. All code undergoes internal review followed by a formal audit from a top-tier security firm before deployment.
4-6 weeks
Phase Duration
2 audits
Security Layers
03
Relayer & Frontend Integration
We build and deploy the off-chain relayer service for secure message passing between chains and integrate the bridge UI/API into your existing marketplace. Includes comprehensive monitoring, alerting, and failover systems for high availability.
2-3 weeks
Phase Duration
99.9% SLA
Relayer Uptime
04
Testing, Deployment & Launch Support
Rigorous multi-chain testing on testnets, followed by a phased mainnet deployment. We provide full technical documentation, admin training, and 30 days of post-launch monitoring and support to ensure a smooth go-live.
1-2 weeks
Phase Duration
8-12 weeks
Total Timeline
Strategic Infrastructure Decision
Build vs. Buy vs. Generic Bridge
A detailed comparison of development approaches for your cross-chain NFT marketplace, analyzing time, cost, security, and long-term viability.
| Critical Factor | Build In-House | Generic Bridge SDK | Chainscore Custom Bridge |
|---|---|---|---|
Time to Market (Initial Launch) | 6-12 months | 2-4 months | 4-8 weeks |
Upfront Development Cost | $200K - $500K+ | $10K - $50K (License/Integration) | $50K - $150K |
Custom Logic & Business Rules | Full Control | Limited to SDK Features | Tailored to Your Marketplace |
Security Audit & Penetration Testing | Your Responsibility (High Risk) | Shared Responsibility (Medium Risk) | Included & Guaranteed (Low Risk) |
Protocol Support (EVM, Solana, etc.) | Your Team Builds Each | Limited by Provider Roadmap | Multi-Chain Strategy from Day 1 |
Gas Optimization & Fee Management | Custom R&D Required | Generic, One-Size-Fits-All | Optimized for NFT Mint/Bridge Patterns |
Ongoing Maintenance & Upgrades | Full Internal Team Burden | Dependent on Vendor Updates | Optional SLA with 24/7 Support |
Branding & User Experience | Fully Customizable | Generic UI/Provider Branding | White-Label, Seamless Integration |
Total Cost of Ownership (Year 1) | $300K - $700K+ | $75K - $120K | $80K - $180K |
Recommended For | Teams with 5+ full-time blockchain engineers | MVPs with basic, non-critical transfers | Scaling startups requiring security, speed, and custom features |
Cross-Chain NFT Bridge
Frequently Asked Questions
Common questions from CTOs and technical founders about building and deploying a secure, scalable NFT bridge.
A production-ready, audited bridge MVP typically deploys in 4-6 weeks. This includes smart contract development, integration with 2-3 target chains (e.g., Ethereum, Polygon, Arbitrum), and a basic front-end. Complex features like dynamic royalty enforcement or custom bridging logic can extend the timeline. We provide a detailed sprint plan within the first week of engagement.
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