We architect and deploy custom smart contracts on EVM and Solana that power your core business logic. Every contract undergoes a rigorous audit cycle with our internal security team before deployment.
LABS
Services
POS Off-Chain Payment Channel Development
We build custom off-chain payment channels for retail POS systems, enabling instant, feeless crypto transactions with final on-chain settlement. Designed for high-volume environments.
Chainscore © 2026
overview
CORE SERVICE
Smart Contract Development
Secure, production-ready smart contracts built for scale and compliance.
Deliver a battle-tested, gas-optimized foundation for your token, DeFi protocol, or NFT project in as little as 2 weeks.
- Full-Stack Development: From
ERC-20/ERC-721tokens to complex DeFi primitives like AMMs and lending vaults. - Security-First Process: Built with
OpenZeppelinstandards, tested withFoundry/Hardhat, and verified on-chain. - Post-Deployment Support: Includes monitoring, upgradeability patterns, and incident response planning.
key-features-cards
ENGINEERING EXCELLENCE
Core Technical Capabilities We Deliver
We build production-ready, secure, and scalable off-chain payment systems. Our engineering approach focuses on delivering measurable outcomes: faster transactions, lower costs, and robust security from day one.
01
Custom State Channel Architecture
Design and implement bespoke payment channel networks using Nitro, Sprites, or custom protocols. We optimize for your specific use case—microtransactions, streaming payments, or high-volume P2P transfers—ensuring sub-second finality and negligible fees.
< 1 sec
Finality
~$0.001
Avg. Tx Cost
02
Secure Smart Contract Development
Deploy battle-tested, audited hub and adjudicator contracts. We use Solidity 0.8+ with OpenZeppelin libraries, implement formal verification for critical logic, and ensure seamless integration with L1/L2 settlement layers like Arbitrum or Optimism.
100%
Coverage Audits
Zero
Critical Bugs
03
High-Availability Node Infrastructure
Provision and manage dedicated, geo-distributed watchtower and relayer nodes. We guarantee 99.9% uptime SLA, automatic failover, and DDoS protection to keep your payment channels operational and censorship-resistant 24/7.
99.9%
Uptime SLA
< 50ms
Global Latency
04
Gas Optimization & Cost Engineering
Reduce on-chain footprint by up to 90% through advanced batching, signature aggregation (EIP-712), and state compression techniques. We deliver detailed gas reports and cost models for predictable operational expenses.
Up to 90%
Gas Reduction
Fixed Fee
Cost Model
05
Cross-Chain & Multi-Asset Support
Enable payments across EVM chains (Ethereum, Polygon, Base) and support native assets, stablecoins, and wrapped tokens. Our systems handle atomic swaps and cross-chain messaging (CCIP, LayerZero) for seamless interoperability.
5+
Chain Support
Any ERC-20
Asset Compatible
benefits
TANGIBLE RESULTS
Business Outcomes for Your Retail Operation
Our POS Off-Chain Payment Channel Development delivers measurable improvements to your bottom line, customer experience, and operational efficiency.
01
Eliminate Payment Processor Fees
Replace traditional card networks with direct, off-chain settlements. Save 1.5-3.5% per transaction by cutting out interchange fees and middlemen.
1.5-3.5%
Cost Savings
0%
Chargeback Risk
02
Sub-Second Transaction Finality
Enable instant, offline-capable payments at the point of sale. Customers experience checkout speeds under 500ms, matching or exceeding contactless card taps.
< 500ms
Checkout Time
100%
Offline Capable
03
Enterprise-Grade Security & Compliance
Deploy with confidence. Our channels use state channel cryptography and are built with OpenZeppelin libraries, following financial-grade security practices.
24/7
Fraud Monitoring
SOC 2
Compliance Ready
04
Seamless Loyalty & Token Integration
Natively integrate your branded tokens, NFTs, or reward points into the payment flow. Increase customer LTV with programmable incentives at checkout.
1-Click
Reward Redemption
+40%
Program Engagement
05
Reduced Operational Complexity
Consolidate payment reconciliation into a single, immutable ledger. Automate settlement and reporting, eliminating manual back-office processes.
90%
Reconciliation Time
Real-Time
Revenue Reporting
06
Future-Proof Payment Infrastructure
Build on a flexible framework that supports new digital assets and regulations. Deploy once, adapt easily to CBDCs, stablecoins, or regional payment rails.
< 2 Weeks
New Asset Integration
Modular
Architecture
Technical & Commercial Comparison
On-Chain vs. Our Off-Chain POS Solution
A direct comparison of traditional on-chain payment processing against our purpose-built off-chain payment channel solution for retail and point-of-sale applications.
| Key Factor | Traditional On-Chain | Chainscore Off-Chain Solution |
|---|---|---|
Transaction Finality | 2 minutes to 15+ minutes | < 2 seconds |
Cost Per Transaction | $0.50 - $15.00+ (Gas Volatility) | < $0.01 (Fixed Fee) |
Peak Throughput (TPS) | ~15-100 TPS (Network Dependent) | 10,000+ TPS (Guaranteed) |
Customer Experience | Wallet pop-ups, confirmations, delays | Tap-to-pay speed, no confirmations |
Development & Integration Time | 3-6 months (Complex wallet logic) | 4-8 weeks (Pre-built SDKs & APIs) |
Settlement Security | High (On-chain finality) | High (Cryptographically secured channels with on-chain dispute resolution) |
Ongoing Operational Cost | Unpredictable, scales with volume | Predictable subscription + minimal fixed fees |
Regulatory & Compliance Readiness | Basic (Raw transactions) | Advanced (Built-in KYT, AML screening, merchant reporting) |
how-we-deliver
END-TO-END DELIVERY
Our Development & Integration Process
We deliver production-ready POS payment channels from concept to launch. Our structured process ensures security, speed, and seamless integration with your existing systems.
01
Architecture & Design
We design a custom off-chain architecture tailored to your transaction volume and settlement needs. This includes defining channel parameters, dispute resolution logic, and integration APIs for your POS terminals.
2-3 days
Design Sprint
3+ Options
Architecture Reviewed
02
Smart Contract Development
Our team builds and audits the core state channel contracts in Solidity. We implement secure deposit handling, fraud-proof dispute mechanisms, and multi-signature finalization.
OpenZeppelin
Security Base
2+ Audits
Internal Review
03
Client SDK & API Integration
We provide a lightweight SDK for your POS terminals to create, sign, and broadcast payment states off-chain. Includes REST APIs for merchant backend reconciliation and balance queries.
< 100ms
API Latency
5+ Languages
SDK Support
04
Security Audit & Testing
Every component undergoes rigorous testing, including unit tests, integration tests simulating network failure, and a formal security audit by a third-party firm before mainnet deployment.
100%
Line Coverage
Certik / Quantstamp
Audit Partners
05
Deployment & Mainnet Launch
We manage the deployment of contracts to your chosen EVM network (Polygon, Arbitrum, Base), configure the infrastructure, and execute the initial funding and channel setup.
1 day
Deployment Window
99.9% SLA
Uptime
06
Monitoring & Support
Post-launch, we provide 24/7 monitoring of channel health, transaction success rates, and automated alerting. Includes dedicated technical support and performance optimization.
24/7
Monitoring
< 15 min
Response Time
security-settlement
CORE ENGINEERING
Smart Contract Development
Secure, production-ready smart contracts built by Web3-native engineers.
We architect and deploy custom smart contracts that form the backbone of your protocol. Our development lifecycle includes formal verification, gas optimization, and comprehensive unit testing to ensure security and efficiency.
Deliver a battle-tested foundation for your token, DeFi protocol, or NFT project in as little as 2-4 weeks.
- Security-First Development: Built with
Solidity 0.8+and auditedOpenZeppelinlibraries. - Multi-Chain Deployment: Deploy to
EVMchains (Ethereum, Polygon, Arbitrum) orSolana. - Full Audit Support: We prepare contracts for and manage third-party audits with firms like CertiK and Quantstamp.
Technical & Commercial Details
POS Payment Channel Development FAQs
Get clear answers on timelines, costs, security, and our development process for building custom off-chain payment channels for your point-of-sale system.
A standard POS payment channel deployment takes 2-4 weeks from kickoff to mainnet launch. This includes smart contract development, integration with your existing POS APIs, and end-to-end testing. Complex multi-chain or high-frequency batch settlement systems may extend to 6-8 weeks. We provide a detailed sprint-by-sprint project plan during 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