We deliver production-ready smart contracts with formal verification and multiple audit passes before mainnet deployment. Our code follows OpenZeppelin standards and includes comprehensive test suites.
LABS
Services
StarkNet Cairo Verifiable Feed Development
We build custom, computationally verifiable data feeds using Cairo for StarkNet. Deploy oracles that execute complex off-chain logic and deliver STARK-based validity proofs for secure, trust-minimized on-chain verification.
Chainscore © 2026
overview
CORE ENGINEERING
Smart Contract Development
Secure, audited smart contracts built on `Solidity`, `Rust`, or `Move` for any EVM or non-EVM chain.
- Custom Logic: DeFi protocols (AMMs, lending/borrowing), NFT marketplaces, DAO governance, and enterprise tokenization.
- Multi-Chain: EVM (Ethereum, Polygon, Arbitrum), Solana (
Rust), Aptos/Sui (Move), and Cosmos SDK. - Security First: Every contract undergoes manual review, automated analysis (Slither, MythX), and third-party audit coordination.
Launch your MVP in 2-4 weeks with battle-tested patterns. We handle the entire lifecycle from architecture and development to deployment and post-launch monitoring.
key-features-cards
ENTERPRISE-GRADE ORACLE INFRASTRUCTURE
Core Capabilities of Our Verifiable Feed Service
We deliver production-ready, high-frequency data feeds for StarkNet applications, built on Cairo 1.0 with cryptographic guarantees for data integrity and availability.
01
High-Frequency Data Feeds
Real-time price feeds for DeFi (ETH/USD, BTC/USD) and custom data streams (sports, weather, IoT) with sub-5 second update intervals on StarkNet mainnet.
< 5 sec
Update Interval
100+
Supported Assets
02
Cairo 1.0 Smart Contracts
End-to-end verifiable logic written in Cairo 1.0. Our feed aggregator and publisher contracts are formally verified for security and gas efficiency.
Cairo 1.0
Language
Formal Verification
Security Standard
03
Cryptographic Data Integrity
Every data point is signed and verified on-chain. Clients can cryptographically prove the authenticity and timestamp of any feed update.
EdDSA Signatures
Proof System
Tamper-Proof
Data Guarantee
04
Multi-Source Aggregation
Aggregate data from 10+ premium and decentralized sources (Chainlink, Pyth, Binance, Coinbase) with outlier detection and weighted median logic.
10+
Data Sources
Weighted Median
Aggregation Logic
05
99.9% Uptime SLA
Enterprise-grade reliability with redundant node operators, automatic failover, and 24/7 monitoring. Guaranteed availability for your critical applications.
99.9%
Uptime SLA
< 60 sec
Failover Time
06
Custom Feed Development
Need a feed for a novel asset or real-world data? We build custom verifiable feeds from specification to mainnet deployment in 2-4 weeks.
2-4 weeks
Deployment Time
Full Customization
Scope
benefits
DELIVERABLES & GUARANTEES
Business Outcomes for Your StarkNet Application
Our StarkNet Cairo Verifiable Feed Development service delivers concrete, measurable results. We focus on building infrastructure that directly impacts your application's performance, security, and scalability.
01
High-Fidelity Data Feeds
Deploy custom Cairo verifiable feeds that deliver off-chain data (prices, sports scores, weather) to your StarkNet dApp with cryptographic integrity. Eliminate reliance on centralized oracles.
< 1 sec
Update Latency
100%
On-Chain Verifiability
02
Proven Security Posture
All feed logic and Cairo contracts undergo rigorous security audits following OpenZeppelin standards. We provide a formal verification report for your most critical components.
Zero
Critical Bugs Shipped
100%
Code Coverage Target
03
Accelerated Time-to-Market
Leverage our battle-tested templates and StarkNet expertise to go from concept to a production-ready verifiable feed in weeks, not months. We handle the Cairo complexity.
2-4 weeks
Production Deployment
24/7
DevOps & Monitoring
04
Cost-Efficient Scaling
Build feeds optimized for StarkNet's L2 gas economics. Our architecture minimizes prover costs and data availability fees, ensuring your application scales affordably.
> 90%
vs L1 Cost
Predictable
Fee Structure
05
Reliable Data Infrastructure
Enterprise-grade feed architecture with multi-source aggregation, fault tolerance, and automatic failover. Guaranteed uptime with transparent SLA-backed performance.
99.9%
Uptime SLA
< 5 min
Mean Time to Recovery
06
Seamless dApp Integration
Receive a complete integration package: well-documented Cairo interfaces, TypeScript SDKs, and example implementations for seamless connection to your frontend and smart contracts.
Full SDK
Included
< 1 day
Integration Support
Infrastructure Decision Matrix
Build vs. Buy: Custom Cairo Feed vs. Standard Oracle
A technical and economic comparison for teams deciding between developing a custom verifiable data feed in-house versus using a standard oracle solution on StarkNet.
| Decision Factor | Build In-House Feed | Use Standard Oracle | Chainscore Custom Cairo Feed |
|---|---|---|---|
Development Timeline | 4-9 months | 2-4 weeks | 6-10 weeks |
Initial Development Cost | $120K - $300K+ | $5K - $20K (integration) | $45K - $150K |
Cairo/StarkNet Expertise Required | Expert (Senior Team) | Minimal | Provided by Chainscore |
Custom Data Logic & Sources | Full control | Limited to provider's API | Fully customizable |
Security & Audit Overhead | High (unaudited risk) | Medium (shared risk) | Low (pre-audited patterns) |
Ongoing Maintenance & Updates | Your team's responsibility | Oracle provider's responsibility | Optional SLA from Chainscore |
Protocol-Specific Optimizations | Possible but costly | Not available | Built-in (e.g., storage proofs) |
Time to First Reliable Production Data | 6+ months | 1 month | 2-3 months |
Total Cost of Ownership (Year 1) | $200K - $600K+ | $25K - $100K | $75K - $200K |
how-we-deliver
END-TO-END DELIVERY
Our Development Process for Cairo Verifiable Feeds
A structured, security-first approach to building and deploying high-integrity data feeds on StarkNet. We deliver production-ready verifiable feeds with clear SLAs, from initial design to mainnet launch.
01
Requirement & Architecture Design
We analyze your data source and business logic to architect a custom Cairo verifiable feed. This includes defining the data model, update frequency, and on-chain verification strategy for optimal gas efficiency and security.
1-2 days
Design Sprint
100%
Requirement Sign-off
02
Cairo Smart Contract Development
Our team writes, tests, and optimizes the core Cairo contracts for your feed. We implement proven patterns for data attestation, access control, and upgradeability using OpenZeppelin Cairo libraries.
Solidity 0.8+
Security Patterns
2-3 weeks
Avg. Dev Time
03
Prover Integration & Off-Chain Service
We build the secure off-chain service that fetches source data, generates STARK proofs of its validity, and submits verified updates to your Cairo contract on StarkNet.
99.9%
Uptime SLA
< 5 min
Proof Gen Time
05
Mainnet Launch & Monitoring
We manage the mainnet deployment process and provide 24/7 monitoring dashboards for feed health, proof submission success rates, and contract performance.
< 1 day
Deployment Window
24/7
Health Monitoring
06
Ongoing Support & Upgrades
Receive proactive maintenance, performance reports, and seamless contract upgrades. We ensure your verifiable feed remains secure and operational as protocols evolve.
4-hr
Response SLA
Zero Downtime
Upgrade Guarantee
tech-stack
ENTERPRISE-GRADE FOUNDATION
Technology & Protocol Stack
We build verifiable feeds on a battle-tested, production-ready technology stack. Our expertise ensures your data infrastructure is secure, scalable, and seamlessly integrated with StarkNet's ecosystem.
03
Security-First Development
Smart contracts built with OpenZeppelin Cairo libraries and undergo rigorous internal review cycles, following best practices to mitigate common vulnerabilities.
04
Scalable Data Pipelines
Architecture designed for high-throughput data ingestion and proof generation, capable of scaling with your application's demand without compromising reliability.
05
Full-Stack Integration
End-to-end delivery including off-chain relayers, indexers, and frontend SDKs, providing a complete, operable feed for your dApp.
06
Continuous Maintenance
Post-deployment monitoring, StarkNet OS upgrade compatibility checks, and proactive optimization to ensure long-term feed integrity and performance.
StarkNet Cairo Verifiable Feed Development
Typical Project Timeline & Deliverables
Transparent breakdown of project phases, key outputs, and estimated timelines for delivering a production-ready verifiable feed on StarkNet.
| Phase & Deliverable | Starter (4-6 Weeks) | Professional (6-10 Weeks) | Enterprise (10-16 Weeks) |
|---|---|---|---|
Project Scoping & Architecture Design | |||
Core Cairo Smart Contract Development | 1 Feed, 1 Data Source | Multi-Source Feed, Custom Logic | Complex Oracle Network, ZK-Proof Integration |
Comprehensive Security Audit | Basic Review | Full Audit + Report | Full Audit + Formal Verification |
Testnet Deployment & Integration Support | StarkNet Goerli | Multi-Testnet (Goerli, Sepolia) | Private Testnet + Mainnet Fork |
Mainnet Deployment & Verification | Assisted Deployment | Full Deployment & Configuration | Automated CI/CD Pipeline Setup |
Performance & Load Testing | Basic Throughput Tests | Stress Tests (10k+ TPS) | Custom Benchmarking & Optimization |
Documentation | Technical Specs & API Docs | Developer Guides + Integration SDK | Full Architectural Runbook & SLA |
Post-Launch Support Window | 2 Weeks | 1 Month | Ongoing SLA (Optional) |
Estimated Investment | $25K - $40K | $60K - $100K | $150K+ (Custom) |
StarkNet Cairo Verifiable Feed
Frequently Asked Questions
Get clear, technical answers about our development process, security, and delivery for your verifiable data feed project.
A verifiable feed is a smart contract that provides authenticated, tamper-proof data (like price oracles, randomness, or sports scores) to other on-chain applications. On StarkNet, using Cairo, these feeds leverage ZK-proofs to be extremely gas-efficient and secure. You need one to build reliable DeFi protocols, prediction markets, or gaming dApps that require trusted, low-cost external data without relying on centralized oracles.
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