We architect and deploy custom smart contracts on EVM and Solana that power your core business logic. Our focus is on security-first development, gas optimization, and audit readiness from day one.
LABS
Services
EVM Cross-Chain Off-Ramp Gateway
A unified API gateway enabling users to cash out crypto from any EVM-compatible chain (Ethereum, Polygon, Arbitrum, etc.) into local fiat currencies, abstracting away chain-specific complexities.
Chainscore © 2026
overview
CORE SERVICE
Smart Contract Development
Secure, production-ready smart contracts built for scale and compliance.
Deliver a secure, auditable, and scalable foundation for your token, DeFi protocol, or NFT project in as little as 2-4 weeks.
- Security & Audits: Built with
OpenZeppelinstandards and prepared for third-party audits by firms like CertiK or Quantstamp. - Protocol Expertise:
ERC-20,ERC-721,ERC-1155,ERC-4626, custom AMMs, staking, and governance. - Full Lifecycle: From architecture and development to deployment, verification, and ongoing maintenance.
key-features-cards
BUILT FOR ENTERPRISE
Core Technical Capabilities
Our EVM Cross-Chain Off-Ramp Gateway is engineered with enterprise-grade security, reliability, and performance. We deliver the foundational infrastructure to convert on-chain assets into fiat, enabling seamless user cash-outs.
01
Multi-Chain Smart Contract Architecture
Deploy a unified, audited smart contract system across Ethereum, Polygon, Arbitrum, and other EVM chains. We implement a modular design for easy integration of new networks, ensuring consistent logic and security postures.
10+
Supported Chains
OpenZeppelin
Security Standard
02
Secure Fiat Settlement Engine
A non-custodial settlement layer that connects to licensed payment processors (PSPs) and banking partners. Features automated AML/KYC compliance checks, multi-sig fund release, and real-time transaction reconciliation.
PCI DSS
Compliant
< 60 min
Settlement Time
03
Real-Time Liquidity & Price Feeds
Integrate with decentralized (DEX) and centralized (CEX) liquidity pools for optimal asset pricing. Our system aggregates feeds from Chainlink, Pyth, and proprietary sources to guarantee fair market rates for off-ramp conversions.
0.3%
Max Slippage
Sub-second
Price Updates
04
Gas-Optimized Transaction Relay
Automated meta-transaction system that sponsors user gas fees for the off-ramp initiation. Dramatically improves UX by abstracting blockchain complexity, with configurable subsidy models and cost recovery mechanisms.
90%
Gas Cost Reduction
ERC-2771
Protocol
05
Comprehensive Monitoring & Alerting
End-to-end observability dashboard tracking on-chain transactions, fiat settlement status, system health, and compliance flags. Get Slack/PagerDuty alerts for failures and real-time analytics on conversion volumes and fees.
99.9%
Uptime SLA
< 30 sec
Alert Latency
06
Regulatory Compliance Framework
Pre-built modules for jurisdictional rules, transaction limits, user verification (KYC), and anti-fraud screening. Designed to adapt to evolving regulations in the US, EU, and other major markets, reducing your legal overhead.
Travel Rule
Ready
24/7
Compliance Logs
benefits
TANGIBLE RESULTS
Business Outcomes You Can Measure
Our EVM Cross-Chain Off-Ramp Gateway delivers specific, measurable value that directly impacts your bottom line and user experience.
01
Faster Time-to-Market
Deploy a fully integrated, production-ready off-ramp in under 2 weeks, not months. We provide the complete infrastructure so you can focus on your core product.
< 2 weeks
Deployment Time
Pre-built
Compliance Modules
02
Reduced Operational Cost
Eliminate the overhead of building and maintaining complex cross-chain infrastructure. Our managed service model converts high fixed costs into predictable, usage-based pricing.
> 60%
Cost Reduction
No DevOps
Team Overhead
03
Enhanced User Trust & Retention
Provide a seamless, reliable cash-out experience with 99.9% uptime and sub-30-second settlement. Reliable infrastructure directly translates to higher user satisfaction and repeat usage.
99.9%
Uptime SLA
< 30 sec
Settlement Time
04
Regulatory Compliance by Design
Integrate with leading KYC/AML providers and built-in transaction monitoring. Our gateway is engineered for compliance, reducing your legal risk and enabling global expansion.
Pre-integrated
KYC/AML
Audit-Ready
Transaction Logs
05
Increased Transaction Volume
Support high-throughput off-ramps capable of processing thousands of transactions per second. Scale seamlessly during market volatility without performance degradation.
1000+
TPS Capacity
Zero Downtime
During Scaling
Structured Roadmap to Production
Phased Implementation Tiers
Our modular approach allows you to launch your cross-chain off-ramp with core functionality and scale to enterprise-grade operations. Choose the tier that matches your current stage and expand as your volume grows.
| Feature / Deliverable | Launch (Phase 1) | Scale (Phase 2) | Enterprise (Phase 3) |
|---|---|---|---|
Core Gateway Smart Contracts | |||
Multi-Chain Support (EVM) | 2 Chains | 5+ Chains | All Major EVM L1/L2 |
Liquidity Bridge Integration | Centralized Bridge | 2-3 Bridge Routers | Dynamic Multi-Bridge Router |
Security Audit & Penetration Testing | Basic Audit | Comprehensive Audit + Bug Bounty | Continuous Auditing & Formal Verification |
Gas Optimization & Fee Management | Basic Estimator | Dynamic Fee Engine | MEV-Resistant Scheduler |
Monitoring & Alerting | Basic Dashboard | Real-Time Analytics & Alerts | 24/7 SOC2-Compliant Monitoring |
SLA & Incident Response | Best Effort | 24h Response Time | 4h Response Time, 99.9% Uptime SLA |
Compliance & Reporting Tools | Basic TX Logs | Advanced Analytics Suite | Custom Regulatory Reporting Module |
Implementation Timeline | 4-6 Weeks | 8-12 Weeks | Custom Roadmap |
Typical Investment | $15K - $30K | $50K - $100K | Custom Quote |
how-we-deliver
PROVEN PROCESS
Our Delivery Methodology
Our structured, security-first approach ensures your EVM cross-chain off-ramp gateway is delivered on time, on budget, and built to scale. We focus on measurable outcomes, not just features.
01
Discovery & Architecture Design
We conduct a deep technical analysis of your liquidity needs, target chains, and user flows. Deliverables include a detailed technical specification, gas cost projections, and a security-first architecture blueprint for your gateway.
1-2 weeks
Phase Duration
3+ chains
Architecture Review
02
Smart Contract Development & Auditing
Development of secure, gas-optimized bridge and settlement contracts in Solidity 0.8+. Includes integration of Chainlink CCIP or LayerZero, and a mandatory audit by a third-party security firm before deployment.
2 Audits
Security Layers
OpenZeppelin
Standards Used
03
Relayer & Infrastructure Deployment
We deploy and configure the off-chain relayer infrastructure, monitoring systems, and multi-sig admin panels. This includes setting up high-availability nodes and defining automated failover procedures.
99.9% SLA
Relayer Uptime
< 30 sec
Alert Response
04
Integration & Go-Live Support
Full integration support for your front-end and backend, comprehensive testing on testnets, and a managed mainnet launch. We provide 24/7 monitoring and developer support for the first 30 days post-launch.
30 days
Post-Launch Support
< 2 days
Integration Time
security-compliance
CORE SERVICE
Smart Contract Development
Secure, production-ready smart contracts built for scale and compliance.
We architect and deploy custom smart contracts that form the backbone of your Web3 application. Our process delivers audit-ready code from day one, using battle-tested patterns from OpenZeppelin and rigorous internal reviews.
- Custom Logic: Tailored
Solidity 0.8+contracts for DeFi, NFTs, DAOs, and enterprise use cases. - Security First: Multi-stage review process and integration with leading audit firms.
- Gas Optimization: Code designed for minimum transaction costs and maximum efficiency on mainnet.
- Full Lifecycle: From specification and development to deployment, verification, and upgrade management.
We deliver contracts you can stake your business on, with a focus on security, maintainability, and clear documentation for your team.
EVM Cross-Chain Off-Ramp Gateway
Frequently Asked Questions
Get clear answers on implementation, security, and support for your cross-chain liquidity solution.
A production-ready EVM cross-chain off-ramp gateway typically deploys in 3-6 weeks. This includes smart contract development, integration with your chosen bridges (like Axelar, LayerZero, or Wormhole), and frontend/backend API setup. For a standard implementation with 2-3 target chains, expect 3 weeks. Complex multi-chain deployments with custom fee logic or advanced security modules can extend to 6 weeks. We provide a detailed project plan within the first 48 hours 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