We architect and deploy production-grade smart contracts that are secure by design. Every contract undergoes a multi-stage audit process, including automated analysis and manual review by our senior Solidity engineers, before deployment to mainnet.
LABS
Services
StarkNet ZK-Rollup Checkout System
We design and deploy custom checkout systems using StarkNet's ZK-rollup technology. Batch thousands of merchant transactions off-chain for 90% lower fees and enhanced privacy. Built for high-volume payment processors.
Chainscore © 2026
overview
CORE INFRASTRUCTURE
Custom Smart Contract Development
Secure, audited smart contracts built to your exact specifications, from tokens to complex DeFi logic.
- Token Systems: Custom
ERC-20,ERC-721, andERC-1155contracts with bespoke minting, vesting, and governance logic. - DeFi Protocols: Automated Market Makers (AMMs), lending/borrowing pools, staking mechanisms, and yield aggregators.
- Enterprise Logic: Multi-signature wallets, asset management systems, and custom business logic for real-world asset (RWA) tokenization.
- Security First: Built with
OpenZeppelinlibraries and following established patterns to mitigate reentrancy, overflow, and access control risks.
We deliver a fully documented, tested, and mainnet-ready contract suite in 2-4 weeks, giving you a secure foundation to build upon without the development risk.
key-features-cards
END-TO-END STARKNET CHECKOUT
Core Components We Deliver
We architect and deliver the complete technical stack for a production-ready, secure, and scalable ZK-Rollup checkout system. Each component is built to enterprise standards, ensuring compliance, performance, and seamless user experience.
benefits
DELIVERABLES & METRICS
Business Outcomes for Your Platform
Our StarkNet ZK-Rollup Checkout System delivers measurable results, from accelerated time-to-market to quantifiable cost reductions. Here’s what you can expect.
01
Accelerated Time-to-Market
Deploy a production-ready, audited checkout system in under 4 weeks. We provide the full stack: smart contracts, frontend SDK, and merchant dashboard, so you can launch faster.
< 4 weeks
To Production
0 lines
ZK-Circuit Code to Write
02
Radically Lower Transaction Costs
Batch thousands of L2 transactions into a single L1 proof. Achieve >99% cost reduction per checkout compared to L1, making micro-transactions and high-volume sales viable.
> 99%
vs. L1 Gas Costs
$0.01 - $0.05
Avg. Cost per Tx
03
Enterprise-Grade Security & Compliance
Built with Cairo 1.0 and audited by leading security firms. Includes built-in fraud detection, KYC/AML integration hooks, and non-custodial fund flows for complete trust.
100%
Non-Custodial
Formal Verification
Cairo 1.0
04
Seamless User & Developer Experience
One-click L1→L2 bridging for users and a modular SDK for developers. Eliminate onboarding friction with social logins and abstract gas fees for end-users.
< 60 sec
User Onboarding
5+
Wallet Integrations
05
Scalable & Future-Proof Architecture
Handle 10,000+ TPS at checkout peaks. Our modular design allows easy upgrades for new payment rails (crypto/fiat), loyalty programs, and StarkNet protocol updates.
10,000+
Peak TPS Capacity
99.9%
Uptime SLA
StarkNet ZK-Rollup Checkout System
Phased Development & Delivery
A structured, milestone-driven approach to deliver a production-ready checkout system with clear deliverables, timelines, and costs.
| Phase & Deliverables | Timeline | Key Outcomes | Investment |
|---|---|---|---|
Phase 1: Architecture & Smart Contracts | 2-3 weeks | Audited core contracts, technical spec, gas optimization report | $15K - $25K |
Phase 2: Frontend SDK & Integration | 3-4 weeks | React/TypeScript SDK, merchant dashboard, testnet deployment | $20K - $35K |
Phase 3: Security Audit & Mainnet Launch | 2-3 weeks | Full audit report, mainnet deployment, monitoring setup | $15K - $30K |
Phase 4: Scaling & Optimization (Optional) | Ongoing | Multi-chain expansion, performance tuning, custom features | Custom |
Post-Launch Support SLA | 12 months | 99.9% uptime, 24h critical bug response, protocol updates | 15-20% of project cost/year |
Total Time to Market | 7-10 weeks | Fully audited, mainnet-ready ZK-Rollup checkout | $50K - $90K + support |
how-we-deliver
PREDICTABLE DELIVERY
Our Development & Deployment Process
A structured, security-first approach to deliver your production-ready ZK-Rollup checkout system in weeks, not months.
01
Architecture & Smart Contract Design
We architect your custom StarkNet checkout logic using Cairo 1.0, implementing gas-efficient payment flows and secure fund custody patterns. This ensures your system is scalable and cost-effective from day one.
Cairo 1.0
Language
OpenZeppelin
Standards
02
Security Audit & Formal Verification
Every contract undergoes rigorous testing and a multi-stage audit process, including static analysis, fuzzing, and manual review, before formal verification on the StarkNet network to eliminate critical vulnerabilities.
Multi-Stage
Audit Process
Formal Proofs
Verification
03
Frontend SDK & Merchant Integration
We deliver a lightweight, type-safe SDK (React/TypeScript) for seamless merchant integration. Includes pre-built UI components for wallet connection, transaction status, and payment confirmation.
React/TS
SDK
< 1 day
Integration Time
04
Deployment & Mainnet Launch
We manage the full deployment lifecycle on StarkNet mainnet, including contract deployment, indexer setup, and RPC endpoint configuration. We provide 24/7 monitoring for the first 30 days post-launch.
StarkNet
Mainnet
24/7
Launch Support
StarkNet Checkout System
Frequently Asked Questions
Get clear answers about our ZK-Rollup checkout development process, timelines, and support.
A standard, production-ready ZK-Rollup checkout system typically deploys in 4-6 weeks. This includes smart contract development, Cairo integration, frontend SDK creation, and security audits. Complex integrations with existing payment rails or custom tokenomics may extend this to 8-10 weeks. We provide a detailed project 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