We architect and deploy custom smart contracts for DeFi, NFTs, DAOs, and enterprise applications. Our development process ensures security-first code with comprehensive audits, delivering contracts that are gas-optimized and ready for mainnet deployment.
LABS
Services
StarkNet Cairo ZK-Rollup Payment Circuits
We develop high-throughput, low-cost programmable payment applications using StarkNet's Cairo language. Our ZK-rollup circuits enable microtransactions, real-time streaming, and batch processing for neobanks and fintechs.
Chainscore © 2026
overview
CORE SERVICE
Smart Contract Development
Secure, production-ready smart contracts built to your exact specifications.
We don't just write code; we engineer systems that manage real value and require absolute reliability.
- Full-Stack Development: From
ERC-20tokens andERC-721NFTs to complex DeFi protocols and cross-chain bridges. - Security & Auditing: Rigorous testing using Foundry/Hardhat, formal verification, and third-party audits from firms like CertiK and Quantstamp.
- Gas Optimization: Expert-level Solidity to minimize transaction costs, a critical factor for user adoption.
- Mainnet Deployment & Verification: We handle the entire deployment lifecycle on Ethereum, Polygon, Arbitrum, and other EVM chains.
key-features-cards
ENGINEERED FOR SCALE
Core Capabilities of Our Payment Circuits
Our StarkNet Cairo ZK-Rollup Payment Circuits are built from the ground up to deliver enterprise-grade transaction throughput, security, and cost efficiency. We provide the foundational infrastructure so you can focus on your product.
01
High-Throughput Transaction Engine
Process thousands of payments per second with sub-second finality. Our Cairo circuits are optimized for batched processing, enabling scalable micro-transactions for DeFi, gaming, and marketplaces.
> 2,000 TPS
Peak Capacity
< 1 sec
Finality
02
Gas-Optimized Cairo Smart Contracts
Reduce user transaction costs by up to 90% compared to L1. We develop custom payment logic in Cairo, leveraging StarkNet's ZK-proofs for maximum efficiency and minimal on-chain footprint.
~90%
Cost Reduction
Cairo 1.0+
Language
03
Enterprise Security & Audits
Every circuit undergoes rigorous security review. We implement formal verification patterns and partner with leading audit firms to ensure your payment infrastructure is battle-tested.
100%
Audit Coverage
Formal Verification
Methodology
04
Custom Payment Logic & Settlement
Tailor transaction flows for your specific use case—from recurring subscriptions and payroll to cross-border settlements. We implement complex business rules directly into the ZK-circuit.
4-6 weeks
Custom Build Time
Multi-Asset
Settlement
06
Real-Time Analytics & Monitoring
Gain full visibility into payment flows with our dashboard. Monitor transaction success rates, fee analytics, and circuit health with alerts for any anomalies.
99.9% SLA
Uptime
Real-Time
Data
benefits
DELIVERABLES
Business Outcomes for Your Neobank or Fintech
Our StarkNet Cairo ZK-Rollup payment circuits deliver measurable infrastructure advantages, reducing operational costs and accelerating your time-to-market.
01
Sub-Second Settlement
Finalize high-volume payments in under 1 second on Layer 2, eliminating the 15+ minute wait times of traditional blockchains and enabling real-time user experiences.
< 1 sec
Settlement Time
15+ min
vs. L1 Ethereum
02
Cost Reduction by 100x
Process thousands of micro-payments for less than $0.01 each. StarkNet's ZK-Rollup architecture dramatically reduces gas fees compared to operating directly on Ethereum mainnet.
< $0.01
Per Tx Cost
100x
Cost Reduction
03
Enterprise-Grade Security
Payment circuits built with formal verification in Cairo and audited by leading security firms. Inherit Ethereum's security with zero-trust, cryptographically proven state transitions.
Formal
Verification
Ethereum L1
Security Inherited
04
Regulatory Compliance Ready
Architected with built-in hooks for AML/KYC checks, transaction monitoring, and audit trails. Simplify compliance reporting for financial regulators.
AML/KYC
Hooks
Full Audit
Trail
05
Scalable Throughput
Handle millions of daily transactions without congestion. Our optimized Cairo circuits ensure consistent performance as your user base grows, avoiding the scaling pitfalls of monolithic L1s.
Millions
Daily Tx Capacity
No Congestion
Guaranteed
06
4-Week Deployment
Go from specification to production in one month. We deliver a fully integrated, tested, and documented payment circuit, accelerating your product launch cycle.
4 weeks
To Production
Full Integration
Delivered
Choose the Right Development Path
StarkNet Payment Circuit Development Tiers
Compare our structured service packages for building custom, high-throughput payment circuits on StarkNet's Cairo ZK-Rollup. Each tier is designed to match your project's scale, security requirements, and operational needs.
| Feature / Deliverable | Starter | Professional | Enterprise |
|---|---|---|---|
Cairo 1.0 Payment Circuit Development | |||
Comprehensive Smart Contract Audit | 1 Round | 2 Rounds + Fix Verification | 3 Rounds + Formal Verification |
Deployment & Mainnet Integration | |||
Performance Optimization (TPS/Fees) | Basic | Advanced (Custom Prover) | Bespoke (Multi-chain Settlements) |
Ongoing Monitoring & Alerting | Self-Service Dashboard | Managed Dashboard + Weekly Reports | 24/7 Proactive Monitoring |
Developer Support SLA | Email (48h) | Priority Slack (24h) | Dedicated Engineer (4h) |
Custom Integrations (e.g., Oracles, Wallets) | Up to 2 | Unlimited Scope | |
Post-Launch Maintenance & Upgrades | Ad-hoc | 6-Month Warranty | Annual SLA with 99.9% Uptime |
Estimated Timeline | 4-6 Weeks | 8-12 Weeks | 12+ Weeks (Custom) |
Typical Project Investment | $15K - $30K | $50K - $150K | Custom Quote ($200K+) |
how-we-deliver
PROVEN METHODOLOGY
Our Development Process for StarkNet Circuits
A structured, security-first approach to building production-ready ZK-Rollup payment circuits. We deliver auditable, high-performance Cairo code with clear milestones and predictable timelines.
01
Requirement Analysis & Architecture
We begin by mapping your payment logic (e.g., multi-asset swaps, batch settlements) to Cairo's computational model. We define the circuit's public inputs, outputs, and constraints to ensure optimal STARK proof generation.
1-2 weeks
Design Phase
100%
Requirement Sign-off
02
Circuit Implementation in Cairo 1.0
Our developers write high-assurance Cairo 1.0 code, focusing on gas efficiency and proof efficiency. We implement custom business logic, state transitions, and data availability layers for your specific payment use case.
Sol 0.8+
Security Patterns
Cairo 1.0
Native Language
03
Rigorous Testing & Formal Verification
Every circuit undergoes unit, integration, and property-based testing. We use formal verification tools for critical state transitions to mathematically prove correctness, eliminating edge-case vulnerabilities before audit.
100%
Branch Coverage
Formal
Verification
04
Security Audit & Optimization
Code is reviewed by our internal security team and submitted to leading third-party auditors specializing in ZK-Rollups. We then optimize for proof generation cost and verification gas on L1.
Third-Party
Audit Mandatory
> 50%
Gas Reduction Target
05
Deployment & Integration
We deploy the verified circuit to StarkNet testnet and mainnet. We provide integration kits (SDKs, event listeners) and documentation for your front-end and backend to interact with the new payment layer.
< 1 day
Deployment Time
Full SDK
Included
06
Monitoring & Maintenance
Post-launch, we offer monitoring for proof generation health, circuit performance, and L1 verification costs. We provide ongoing support for upgrades and optimizations as the StarkNet ecosystem evolves.
24/7
Alerting
SLA
Support Tiers
Strategic Decision Analysis
Build vs. Buy: StarkNet Payment Circuit Development
A detailed comparison of the total cost, risk, and time investment required to develop a secure, production-ready ZK-Rollup payment circuit in Cairo, contrasting an in-house build with a specialized development partner.
| Factor | Build In-House | Partner with Chainscore |
|---|---|---|
Time to Production | 6-12 months | 4-8 weeks |
Initial Development Cost | $200K - $500K+ | $50K - $150K |
Security Audit Requirement | Mandatory (External Cost) | Included (Pre-Audited Patterns) |
Cairo & STARK Prover Expertise | Must Hire/Build | Included (Core Contributors) |
Ongoing Maintenance & Upgrades | Full Internal Team | Optional SLA Support |
Integration Risk | High (Unproven Architecture) | Low (Battle-Tested Circuits) |
Time-to-First-Transaction |
| < 2 months |
Total Year 1 Cost (Est.) | $300K - $600K+ | $75K - $200K |
StarkNet Payment Circuits
Frequently Asked Questions
Get clear answers on our development process, timelines, and security for your StarkNet Cairo ZK-rollup payment infrastructure.
We deliver production-ready StarkNet Cairo payment circuits in 3-6 weeks from kickoff. A standard 4-week timeline includes: Week 1 for requirements & architecture, Weeks 2-3 for core development and unit testing, and Week 4 for integration testing and final audit. Complex multi-asset or cross-chain circuits may extend this timeline, which we scope and quote upfront.
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