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Smart Contract Security Audits
View Audit Services
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Explore DeFi
Full-Stack Web3 dApp Development
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Book Consultation
Smart Contract Security Audits
View Audit Services
Custom DeFi Protocol Development
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Full-Stack Web3 dApp Development
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LABS
Services

StarkNet/zkSync Invoice Logic Implementation

We build enterprise-grade invoice generation and tracking applications on StarkNet or zkSync. Our ZK-Rollup solutions deliver data confidentiality, sub-cent transaction costs, and settlement in under 5 minutes.
Chainscore © 2026
overview
SECURE, AUDITED CODE

Custom Smart Contract Development

Enterprise-grade smart contract development with formal verification and comprehensive security audits.

We architect and deploy secure, gas-optimized smart contracts for ERC-20, ERC-721, and custom protocols. Our process includes formal verification and third-party audits from firms like CertiK or Quantstamp to eliminate vulnerabilities before mainnet deployment.

  • Full Lifecycle Support: From initial design and Solidity 0.8+ development to deployment, monitoring, and upgrade management.
  • Proven Security: Built on OpenZeppelin standards with custom security patterns for access control and reentrancy protection.
  • Gas Optimization: We reduce transaction costs by 15-40% through efficient code and storage patterns, critical for user adoption.

Deliver production-ready contracts in 2-4 weeks, backed by a 99.9% uptime SLA and post-launch support.

key-features-cards
ENTERPRISE-GRADE INFRASTRUCTURE

Core Capabilities of Our ZK-Rollup Invoice System

Our implementation delivers a production-ready, secure, and scalable invoice management layer on StarkNet or zkSync, designed to meet the stringent demands of B2B finance.

01

Zero-Knowledge Proof Generation

Automated generation and verification of ZK proofs for invoice state transitions, ensuring transaction validity and privacy without revealing sensitive commercial data on-chain.

< 5 min
Proof Gen Time
256-bit
Security Level
02

Custom Invoice Logic & Smart Contracts

Tailored Solidity/Cairo smart contracts implementing your specific invoice lifecycle, payment terms, discounting rules, and multi-currency settlement logic.

OpenZeppelin
Audit Standards
ERC-20/721
Token Standards
03

High-Throughput Batch Processing

Process thousands of invoice updates, payments, and settlements in a single L2 batch, reducing per-transaction costs by 90-99% compared to L1 execution.

10k+ TPS
Theoretical Capacity
$0.01
Avg. Tx Cost
04

Real-Time Data Availability & Finality

Guaranteed data availability on Ethereum L1 with sub-4 hour finality on StarkNet or near-instant finality on zkSync, ensuring audit trails and dispute resolution.

99.9%
Uptime SLA
< 4 hrs
Ethereum Finality
05

Regulatory-Compliant Audit Trails

Immutable, timestamped records of all invoice actions compliant with financial reporting standards, enabling seamless integration with enterprise ERP systems.

FIPS 140-2
Crypto Module
GDPR-ready
Data Privacy
06

Enterprise API & Web3 Integration

REST/GraphQL APIs for traditional systems paired with Web3 wallet integration (MetaMask, Argent) for a hybrid user experience, accelerating adoption.

< 100ms
API Latency
2 weeks
Integration Time
benefits
DELIVERABLES

Business Outcomes for Your FinTech or Web3 Product

Our StarkNet/zkSync Invoice Logic Implementation is engineered to deliver measurable business results. We focus on technical execution that drives your product's growth, security, and user adoption.

01

Faster Time-to-Market

Deploy a fully audited, production-ready invoice and payment system on StarkNet or zkSync in under 3 weeks. Our modular, pre-tested components eliminate months of R&D and integration time.

< 3 weeks
Deployment Time
Pre-tested
Modular Components
02

Radically Lower Transaction Costs

Leverage ZK-rollup efficiency to reduce invoice settlement fees by over 90% compared to Ethereum L1. Enable micro-payments and high-frequency billing models previously cost-prohibitive.

> 90%
Cost Reduction
Sub-cent
Settlement Fees
03

Enterprise-Grade Security & Compliance

Receive logic built with formal verification principles and audited against OWASP Top 10 for Web3. Includes built-in compliance hooks for KYC/AML and automated audit trails.

Formally Verified
Core Logic
OWASP Audited
Security Standard
04

Seamless Fiat & Crypto Integration

Go beyond crypto-native payments. Our implementation includes secure on/off-ramp connectors and multi-currency settlement logic (stablecoins, ETH, ERC-20s) to serve a global customer base.

Multi-Currency
Settlement
On/Off-Ramp
Integrated
05

Automated, Trustless Workflows

Replace manual reconciliation with smart contract automation. Features include automatic late fee application, recurring billing schedules, and instant payment verification—all without intermediaries.

Zero Manual
Reconciliation
Instant
Payment Proof
06

Scalable Infrastructure Foundation

Build on a system designed for volume. Our architecture supports thousands of invoices per second with sub-second finality, ensuring performance scales with your business growth.

1000+ TPS
Invoice Capacity
< 1 sec
Finality
Infrastructure Decision Matrix

Build vs. Buy: ZK-Rollup Invoice Logic

A detailed comparison of the costs, risks, and timelines for developing a custom ZK-Rollup invoice solution in-house versus partnering with Chainscore Labs for a production-ready implementation.

FactorBuild In-HouseChainscore Implementation

Time to Production

6-12 months

4-8 weeks

Initial Development Cost

$250K - $600K+

$50K - $150K

Security & Audit Overhead

High (unaudited, custom risk)

Low (pre-audited patterns, formal verification)

Core Team Required

3-5 Senior ZK Engineers

Your Product Team + Our Experts

ZK-Circuit Expertise

Must hire/build internally

Included (StarkNet Cairo/zkSync Era)

Ongoing Maintenance

Full internal team burden

Optional SLA with 24/7 monitoring

Time to First Invoice Settled

9+ months

< 2 weeks (PoC)

Compliance & Reporting Features

Custom build from scratch

Pre-built modules (VAT, multi-currency)

Total Cost of Ownership (Year 1)

$400K - $800K+

$75K - $200K

how-we-deliver
A PROVEN 6-STEP FRAMEWORK

Our Implementation Process: From Audit to Mainnet

We deliver secure, production-ready StarkNet or zkSync invoice logic with a transparent, milestone-driven process that de-risks your deployment and accelerates time-to-market.

01

1. Architecture & Specification

We conduct a deep-dive workshop to define your invoice logic, payment flows, and integration points. You receive a detailed technical specification and a 2-week implementation roadmap.

2-3 days
Workshop
100%
Spec Alignment
02

2. Smart Contract Development

Our certified Cairo/Solidity developers build your custom invoice logic with gas optimization, upgradability patterns, and comprehensive unit tests for StarkNet or zkSync.

OpenZeppelin
Standards
100%
Test Coverage
03

3. Security Audit & Review

Every contract undergoes a rigorous internal audit against the latest vulnerabilities. We provide a formal audit report with findings and remediation before proceeding.

2 Auditors
Peer Review
Critical: 0
Guarantee
04

4. Testnet Deployment & Integration

We deploy the audited contracts to StarkNet Goerli or zkSync Sepolia, execute end-to-end integration tests with your front-end, and validate all business logic.

Goerli/Sepolia
Testnets
E2E
Testing
05

5. Mainnet Deployment & Verification

We manage the secure mainnet deployment on StarkNet or zkSync Era, verify the contract source code on block explorers, and execute final security checks.

Verified
Source Code
SLA
Deployment Window
06

6. Monitoring & Support Handoff

We provide 30 days of post-launch monitoring, performance dashboards, and comprehensive documentation to ensure your team can own and scale the system.

30 days
Included Support
Full Docs
Handoff
Structured Implementation Phases

Typical 8-12 Week Delivery Timeline

A detailed breakdown of our phased delivery model for custom StarkNet or zkSync invoice logic, ensuring predictable delivery and clear milestones.

Phase & DeliverablesWeek 1-3: Discovery & DesignWeek 4-8: Core DevelopmentWeek 9-12: Testing & Launch

Requirements & Architecture

Smart Contract Specification

Core Invoice Logic (zkVM)

Payment & Dispute Modules

Frontend Integration Kit

Internal Security Audit

Testnet Deployment & QA

Mainnet Launch Support

Documentation & Handoff

Typical Investment

$15K - $25K

$40K - $70K

$20K - $30K

StarkNet & zkSync Invoice Logic

Frequently Asked Questions

Get clear answers on our implementation process, security, and support for your Layer-2 invoice system.

A complete, production-ready invoice logic implementation typically takes 3-5 weeks. This includes a 1-week discovery and design phase, 2-3 weeks of core development and unit testing, and a final week for integration, security review, and deployment. Complex integrations with existing ERP or accounting systems may extend this by 1-2 weeks.

ENQUIRY

Get In Touch
today.

Our experts will offer a free quote and a 30min call to discuss your project.

NDA Protected
24h Response
Directly to Engineering Team
10+
Protocols Shipped
$20M+
TVL Overall
NDA Protected Directly to Engineering Team