We architect and deploy custom smart contracts for DeFi, NFTs, DAOs, and enterprise applications. Our development process ensures security-first code with formal verification, comprehensive testing, and third-party audits.
LABS
Services
ZK-Rollup Batch Settlement with Built-In Tax Deduction
A custom Layer 2 solution that batches thousands of off-chain payments, computes aggregate tax liabilities privately, and settles net amounts with pre-deducted taxes on-chain.
Chainscore © 2026
overview
CORE SERVICE
Smart Contract Development
Secure, production-ready smart contracts built by Web3 experts to power your dApp.
Deliver a battle-tested, gas-optimized contract suite in as little as 2-4 weeks, accelerating your time-to-market.
- Protocols & Standards:
ERC-20,ERC-721,ERC-1155,ERC-4626, and custom logic. - Security Foundation: Built with
OpenZeppelinlibraries andSlither/MythXanalysis. - Full Lifecycle: From architecture and development to deployment, verification, and monitoring on
EVM/L2networks.
key-features-cards
ENGINEERED FOR COMPLIANCE & SCALE
Core Architecture & Capabilities
Our ZK-Rollup settlement layer is built from the ground up to handle high-volume transactions while automating tax compliance, reducing your operational overhead and technical risk.
01
Zero-Knowledge Proof Settlement
Process thousands of transactions off-chain with a single, verifiable proof on the L1. Achieve sub-second finality and reduce gas costs by 90-95% compared to direct L1 execution.
90-95%
Gas Cost Reduction
< 1 sec
Transaction Finality
02
Built-In Tax Deduction Engine
Automated, on-chain calculation and withholding of capital gains tax per jurisdiction. Configurable rulesets ensure real-time compliance without manual intervention, auditable via Merkle proofs.
100%
Automated Compliance
Real-time
Withholding
03
Customizable Sequencer & Prover
Dedicated infrastructure for transaction ordering and proof generation. Offers decentralized sequencing options and hardware-accelerated provers for predictable, low-latency batch settlement.
99.9%
Sequencer Uptime SLA
< 10 min
Proof Generation
04
Modular Smart Contract Framework
Pre-audited, upgradeable core contracts for rollup state management, bridging, and fee logic. Built with OpenZeppelin standards and formal verification patterns for enterprise-grade security.
OpenZeppelin
Security Standard
Upgradeable
Architecture
05
Multi-Chain Settlement & Bridging
Settle proofs and enable asset movement across Ethereum, Arbitrum, and Polygon. Our canonical bridges use optimistic verification and fraud proofs for secure, trust-minimized transfers.
EVM Chains
Supported
7-day
Challenge Period
06
Compliance & Reporting Dashboard
Unified portal for monitoring settlement health, tax withholdings, and generating jurisdiction-specific reports. Provides real-time analytics and audit trails for financial controllers.
Real-time
Analytics
FATF/G20
Reporting Standards
benefits
PRODUCTION-READY SETTLEMENT
Business Outcomes for Payment Platforms
Our ZK-Rollup batch settlement with integrated tax logic delivers measurable improvements in operational efficiency, compliance, and user experience. Built for fintechs scaling high-volume payment rails.
01
Sub-Second Transaction Finality
Settle thousands of payments in a single batch with cryptographic finality in under one second. Eliminate the delays and uncertainty of traditional on-chain confirmations for your users.
< 1 sec
Finality Time
10,000+
Tx per Batch
02
Automated Tax Compliance
Tax deduction logic is executed at the protocol level within each settlement batch. Guarantees regulatory compliance for every transaction, removing manual reconciliation and audit risk.
100%
Coverage
Zero-Touch
Reconciliation
03
Cost Reduction up to 90%
Batch processing amortizes gas costs across all transactions. Drastically lower per-transaction fees compared to direct L1 settlements, enabling micro-payments and new business models.
90%
Cost Savings
$0.001
Avg. Fee per Tx
05
Seamless Fiat On/Off Ramps
Pre-integrated connectors for major payment processors (Stripe, Checkout.com) and banking APIs. Users deposit and withdraw in local currency without leaving your platform.
30+
Currencies
< 5 Min
Settlement to Bank
06
Full Transaction Privacy
Zero-Knowledge proofs validate batches without exposing individual user data on-chain. Protect customer PII and transaction patterns while maintaining a verifiable public ledger.
ZK-SNARKs
Proof System
Data Minimized
On-Chain Footprint
Infrastructure Decision Analysis
Build vs. Buy: ZK-Rollup Tax Settlement
A detailed comparison of the total cost, risk, and time commitment required to build a custom ZK-rollup with automated tax deduction versus leveraging Chainscore's managed service.
| Factor | Build In-House | Chainscore Managed Service |
|---|---|---|
Time to Production | 6-12+ months | 4-8 weeks |
Upfront Development Cost | $250K - $600K+ | $0 |
Security Audit Complexity | High (Multiple ZK circuits, SCs) | Included & Pre-Verified |
Ongoing Infrastructure Cost | $15K - $40K/month (DevOps, nodes) | Usage-based, starts at ~$5K/month |
ZK Circuit Expertise Required | Must hire/develop in-house | Fully abstracted; our expertise |
Regulatory Compliance (Tax Logic) | Your legal team's responsibility | Pre-built, adaptable templates |
Time to First Settlement Batch | After full dev cycle (~6 months) | Day 1 of integration |
SLA for Uptime & Support | Your team's responsibility | 99.9% Uptime, 24/7 SRE Support |
Total Year 1 Cost (Est.) | $430K - $1M+ | $60K - $150K |
Key Risk | Project delays, security vulnerabilities, talent attrition | Predictable cost, accelerated roadmap, mitigated risk |
how-we-deliver
PROVEN PROCESS
Our Delivery Methodology
We deliver production-ready ZK-Rollup infrastructure through a structured, milestone-driven approach that ensures security, compliance, and rapid deployment.
01
Architecture & Protocol Design
We design your custom ZK-Rollup circuit logic, including the built-in tax deduction mechanism, and define the data availability layer (Ethereum, Celestia).
2-3 weeks
Design Phase
EVM / StarkNet
Protocol Options
02
Circuit Development & Proving
Our team implements the zero-knowledge circuits (using Circom, Halo2, or Cairo) for transaction batching and tax computation, ensuring cryptographic correctness.
ZK-SNARK / STARK
Proof System
< 5 sec
Proof Gen Target
03
Smart Contract & Sequencer Deployment
We deploy the on-chain verifier, bridge contracts, and the off-chain sequencer node, establishing the core settlement layer on your chosen network.
Mainnet Ready
Audited Contracts
99.9% SLA
Sequencer Uptime
04
Tax Logic Integration & Compliance
We integrate your specific tax deduction rules (e.g., wash sale, FIFO) directly into the rollup's state transition logic, ensuring on-chain compliance.
Real-time
Calculation
Immutable Audit
Transaction Trail
05
RPC Gateway & Monitoring
We provision dedicated RPC endpoints, block explorers, and a comprehensive dashboard for monitoring batch status, fees, and system health.
< 100ms
RPC Latency
24/7
Alerting
06
Handover & Ongoing Support
We provide full documentation, source code access, and offer ongoing infrastructure management with defined SLAs for upgrades and maintenance.
Full Docs
Knowledge Transfer
Enterprise SLA
Support Tier
security-compliance
CORE SERVICE
Smart Contract Development
Secure, production-ready smart contracts built for speed and reliability.
We deliver audit-ready smart contracts that power your core business logic. Our development process is built on Solidity 0.8+ with OpenZeppelin standards, ensuring security and upgradability from day one.
Deploy a custom
ERC-20,ERC-721, or complex DeFi protocol in 2-4 weeks.
Our full-cycle development includes:
- Architecture & Design: Gas-optimized logic and upgrade paths.
- Implementation: Custom logic for tokens, staking, governance, and marketplaces.
- Testing & Auditing: Comprehensive unit/integration tests and third-party audit preparation.
- Deployment & Verification: Mainnet deployment with full contract verification and documentation.
We focus on measurable outcomes:
- 99.9% uptime for contract interactions.
- Sub-5 second average transaction confirmation.
- Zero critical vulnerabilities in production deployments.
ZK-Rollup Batch Settlement
Frequently Asked Questions
Get clear, technical answers about our ZK-Rollup development service with integrated tax logic.
A standard deployment with built-in tax deduction logic takes 4-6 weeks from kickoff to mainnet launch. This includes 2 weeks for architecture and smart contract development, 1 week for integration and testing, and 1-3 weeks for security audits and final deployment. Complex requirements like custom state transition functions or multi-chain support can extend the timeline, which we scope and agree upon 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