We architect, develop, and deploy custom smart contracts that form the secure backbone of your application. Our engineers specialize in Solidity 0.8+, Rust (Solana), and Vyper, implementing battle-tested patterns from OpenZeppelin and Solmate to ensure gas efficiency and security from day one.
LABS
Services
IoT Recurring Micro-subscription Engine
Gas-efficient smart contracts and off-chain systems to manage recurring micropayments for IoT services, with automated proration and cancellation handling.
Chainscore © 2026
overview
CORE SERVICE
Smart Contract Development
Secure, production-ready smart contracts built by Web3-native engineers.
From token standards to complex DeFi logic, we deliver code you can stake your business on.
- Comprehensive Audit Readiness: Contracts are built with formal verification in mind, featuring NatSpec documentation, comprehensive unit/integration tests, and a clean audit trail.
- Protocol-Specific Expertise:
ERC-20/721/1155, Automated Market Makers (AMMs), Staking/Vesting, Multi-signature wallets, and custom governance systems. - Deployment & DevOps: We handle the full lifecycle—from local
Hardhat/Foundrytesting to mainnet deployment onEthereum,Polygon,Arbitrum, orSolana—with verified source code and monitoring setup.
key-features-cards
BUILT FOR SCALE
Core Engine Capabilities
Our engine is purpose-built for the unique demands of IoT micro-transactions, delivering enterprise-grade reliability and developer velocity.
01
Gas-Optimized Smart Contracts
Custom Solidity contracts for subscription management, payment streaming, and device authorization. Built with OpenZeppelin standards and gas optimization patterns to minimize on-chain costs for high-frequency micro-payments.
40-60%
Gas Reduction
ERC-20/ERC-777
Token Standards
02
Real-Time Payment Streaming
Continuous, automated payment flows from IoT devices to service providers. Supports per-second billing, automated top-ups, and instant settlement via Layer 2s like Polygon or Arbitrum for sub-cent transactions.
< 1 sec
Settlement Time
$0.001+
Min. Tx Value
03
Secure Device Identity & Auth
On-chain device registration and authentication using cryptographic signatures. Implements secure key management and role-based access control (RBAC) to prevent unauthorized billing and device spoofing.
Zero-Trust
Security Model
SOC 2 Type II
Compliance
04
Automated Off-Chain Orchestration
Reliable backend services that listen to on-chain events, trigger device actions, and manage subscription lifecycles. Includes failover mechanisms and idempotent processing for 99.9% operational uptime.
99.9%
Uptime SLA
< 100ms
Event Processing
05
Multi-Chain Settlement Layer
Deployable architecture that abstracts blockchain complexity. Supports settlement on Ethereum L2s, Solana, or other high-throughput chains based on cost and speed requirements, with a unified API.
5+
Supported Chains
Unified API
Developer Experience
06
Compliance & Reporting Engine
Built-in tools for tax calculation, revenue recognition, and audit trails. Generates immutable records for every micro-transaction, simplifying financial reconciliation and regulatory compliance.
FATF Travel Rule
Ready
Real-Time
Reporting
benefits
BUILT FOR SCALE
Why IoT Companies Choose Our Engine
Our blockchain-based micro-subscription engine is engineered for the unique demands of IoT ecosystems, delivering predictable costs, seamless automation, and enterprise-grade reliability.
01
Sub-Second Settlement & Payment Finality
Process micro-transactions in real-time with cryptographic finality. Eliminate chargeback risk and reconcile payments instantly, enabling true pay-per-use IoT business models.
< 1 sec
Settlement Time
0%
Chargeback Risk
02
Automated, Tamper-Proof Billing Logic
Execute subscription rules and tiered pricing via on-chain smart contracts. Billing logic is transparent, auditable, and cannot be altered post-deployment, ensuring complete trust.
100%
Audit Trail
Zero-Touch
Billing Execution
03
Multi-Chain & Multi-Currency Support
Deploy on Ethereum, Polygon, or other EVM-compatible chains. Accept stablecoins, native tokens, or implement gasless meta-transactions for superior user experience.
EVM+
Chain Compatibility
Gasless
Tx Options
04
Enterprise-Grade Security & Compliance
Smart contracts built with OpenZeppelin standards and undergo rigorous third-party audits. Infrastructure includes SOC 2 Type II compliant node operation for regulated environments.
Third-Party
Security Audits
SOC 2
Compliance
05
Seamless IoT Device Integration
Lightweight SDKs and REST APIs allow your devices to trigger billing events directly. Supports both online and offline transaction queuing for unreliable networks.
< 100KB
SDK Footprint
REST/WebSocket
API Protocols
06
Predictable Cost Structure & Scalability
Fixed monthly platform fee replaces variable payment processor percentages. Architecture scales horizontally to support millions of devices and transactions without performance degradation.
Fixed Fee
Pricing Model
Millions
Devices Supported
Structured Roadmap for IoT Micro-subscription Success
Phased Development Tiers
Choose the development path that aligns with your product launch timeline, budget, and operational needs. Each tier builds upon the last, ensuring a clear, scalable progression.
| Feature / Deliverable | Proof-of-Concept | Production-Ready | Fully Managed |
|---|---|---|---|
Architecture Design & Smart Contracts | |||
On-Chain Subscription Logic | Basic (ERC-20) | Advanced (ERC-721/1155) | Custom Hybrid Model |
IoT Device Integration SDK | Basic API | Multi-Protocol SDK | White-Label SDK + Docs |
Payment Gateway (Crypto/Fiat) | Crypto-only | Stripe/Coinbase Integration | Multi-Gateway Aggregator |
Smart Contract Audit | Internal Review | Third-Party Audit Report | Third-Party Audit + Formal Verification |
Deployment & Network Setup | Testnet Only | Mainnet on 1 Chain | Multi-Chain Deployment (3+) |
Dashboard & Admin Panel | Read-only Analytics | Full Admin Control | Custom Branded Portal |
Ongoing Support & SLA | Email (Biz Hours) | 24/7 Slack, 12h Response | Dedicated Engineer, 1h P1 Response |
Infrastructure Monitoring | Basic Alerts | Proactive Health Checks | Predictive Analytics & Auto-Scaling |
Time to Launch | 4-6 weeks | 8-12 weeks | 12-16 weeks |
Estimated Investment | $25K - $50K | $80K - $150K | $200K+ (Custom) |
how-we-deliver
PROVEN METHODOLOGY
Our Development & Integration Process
A structured, security-first approach to deliver a production-ready IoT subscription engine in weeks, not months. We handle the blockchain complexity so you can focus on your product.
01
Discovery & Architecture Design
We map your IoT device ecosystem and business logic to design a scalable, cost-effective smart contract architecture. This includes selecting the optimal L2 (Polygon, Arbitrum) and token standards (ERC-20, ERC-1155) for micro-transactions.
2-3 days
Design Sprint
1 week
Architecture Spec
02
Smart Contract Development
Our engineers build gas-optimized, auditable smart contracts for subscription management, automated billing cycles, and prorated payments. Built with Solidity 0.8+ and OpenZeppelin libraries for maximum security.
OpenZeppelin
Security Standard
2-3 weeks
Development Time
03
Backend & API Integration
We develop the off-chain backend service that securely links your IoT devices to the blockchain. This includes webhook listeners for on-chain events and a robust API for device management and billing status.
REST & WebSocket
API Support
< 100ms
Event Processing
05
Security Audit & Testing
Every component undergoes rigorous testing, including unit tests, integration tests simulating high device load, and a formal smart contract audit review by our internal security team prior to mainnet deployment.
100%
Test Coverage
Internal Audit
Security Review
06
Deployment & Go-Live Support
We manage the deployment to your chosen testnet and mainnet, configure monitoring alerts, and provide 30 days of post-launch support to ensure a smooth transition to production operations.
1-2 days
Deployment Window
30 days
Launch Support
For CTOs & Product Leaders
Technical FAQs: IoT Micro-subscription Engines
Answers to the most common technical and commercial questions from teams building on-chain recurring revenue models for connected devices.
For a standard IoT micro-subscription engine with one payment token and a single device type, we deliver a production-ready, audited system in 4-6 weeks. Complex deployments with multi-chain settlement, multiple device tiers, or custom oracle integrations typically take 6-10 weeks. Our phased delivery includes a 2-week design sprint, 3-4 weeks of core development, and 1-2 weeks for security audit and deployment.
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