We architect and deploy custom smart contracts that form the backbone of your Web3 application. Our process is built on security-first principles and delivers audit-ready code from day one.
LABS
Services
ZK-Rollup Privacy-First Expense Aggregation
We design and deploy custom ZK-Rollup solutions that batch and settle corporate expense transactions off-chain. Ensure transaction privacy and data confidentiality while maintaining a public proof of validity on Ethereum.
Chainscore © 2026
overview
CORE ENGINEERING
Smart Contract Development
Secure, production-ready smart contracts built for scale and compliance.
From tokenomics to complex DeFi logic, we translate your business requirements into immutable, efficient on-chain systems.
- Full-Stack Development: End-to-end contracts for
ERC-20,ERC-721,ERC-1155, and custom protocols usingSolidity 0.8+andHardhat. - Security & Audits: Development with
OpenZeppelinstandards, integrated testing, and preparation for formal audits by leading firms. - Gas Optimization: Expert-level tuning to reduce deployment and transaction costs by up to 40%.
- Mainnet Deployment: Full support for deployment, verification, and monitoring on
Ethereum,Polygon,Arbitrum, and other EVM chains.
key-features-cards
END-TO-END ARCHITECTURE
Core Components We Deliver
We build and deploy the complete technical stack for your private expense aggregation layer, from zero-knowledge circuits to the production-ready frontend. Each component is designed for enterprise-grade security, compliance, and scalability.
01
ZK-Circuit Design & Implementation
Custom zero-knowledge circuits (using Circom or Noir) that prove transaction validity and privacy compliance without revealing sensitive financial data. We implement the logic for private balance aggregation and regulatory proofs.
ZK-SNARKs/STARKs
Proof System
< 5 sec
Proof Generation
02
Rollup Smart Contract Suite
On-chain verifier and manager contracts deployed on Ethereum L1 or other settlement layers. Handles proof verification, state updates, and fraud challenges with gas-optimized Solidity.
Solidity 0.8+
Language
OpenZeppelin
Security Standard
03
Sequencer & Prover Infrastructure
High-availability node infrastructure that batches transactions, generates ZK proofs, and submits them to the base chain. Built for sub-second latency and 99.9% uptime.
99.9%
Uptime SLA
< 1 sec
Batch Finality
04
Data Availability Layer
Implementation of a secure data availability solution (validium or volition mode) using Celestia, EigenDA, or Ethereum calldata to ensure data is published and accessible for verification.
~$0.01
Avg. Cost/Tx
Ethereum L1
Fallback Option
05
Privacy-First SDK & APIs
Developer SDKs (TypeScript/Go) and REST/GraphQL APIs for seamless integration. Enables applications to submit private transactions and query aggregated balances without handling ZK complexity.
TypeScript/Go
SDK Languages
GraphQL
Query Layer
06
Compliance Dashboard & Frontend
A white-label admin dashboard for financial controllers and auditors. Provides views into aggregated totals, proof of solvency, and compliance reports without exposing individual transaction details.
Audit Trail
Key Feature
White-label
Deployment
benefits
DELIVERABLES
Business Outcomes for Your FinTech
Our ZK-Rollup Privacy-First Expense Aggregation platform delivers measurable results, from accelerated compliance to new revenue streams. Here's what you can expect.
01
Regulatory Compliance by Design
Pre-built modules for GDPR, MiCA, and AML/KYC ensure your expense platform meets global standards from day one. We handle the privacy-preserving identity layer so you can focus on growth.
GDPR
Compliant
MiCA
Ready
02
Zero-Knowledge Transaction Privacy
Enable confidential corporate spending and payroll without exposing sensitive financial data. Our ZK-circuits prove transaction validity while keeping amounts and counterparties private on-chain.
ZK-SNARKs
Proof System
Private
Data Fields
03
Sub-Second Settlement & Finality
Move from batch processing to real-time expense reconciliation. Our optimized rollup architecture provides near-instant finality, improving cash flow and operational efficiency.
< 1 sec
Avg. Finality
24/7
Settlement
04
Multi-Chain Asset Aggregation
Consolidate expenses and payments across Ethereum, Polygon, Arbitrum, and Base into a single, auditable dashboard. Simplify treasury management for multi-chain organizations.
4+
Networks
ERC-20
Token Standard
05
Auditable, Tamper-Proof Ledger
Every expense is immutably recorded on the rollup with cryptographic proofs. Streamline internal audits and provide regulators with verifiable compliance trails on demand.
Immutable
Record
On-Chain
Audit Trail
06
Reduced Operational Overhead
Automate manual reconciliation and reporting processes. Our platform cuts administrative costs by automating policy enforcement, receipt validation, and approval workflows.
70%
Time Saved
Automated
Workflows
Structured Implementation Roadmap
Phased Development & Delivery
A transparent, milestone-driven approach to building your ZK-Rollup expense aggregation layer, from MVP to full-scale enterprise deployment.
| Phase & Deliverables | Foundation (Weeks 1-4) | Scale (Weeks 5-10) | Enterprise (Weeks 11-16+) |
|---|---|---|---|
Core ZK Circuit & Smart Contracts | Custom circuits for private balance aggregation & proof generation. Base settlement contracts on L1. | Advanced circuits for multi-asset support & batch verification. Optimized gas contracts. | Custom circuit extensions for compliance proofs (e.g., travel policy). Cross-chain settlement modules. |
Rollup Node & Prover Infrastructure | Basic sequencer & prover setup for testnet. 1-2 second proof generation time. | High-availability sequencer cluster. Sub-second proof generation. Dedicated RPC endpoints. | Multi-region, fault-tolerant infrastructure. Real-time proof aggregation. 99.9% uptime SLA. |
API Layer & Developer SDK | Core REST APIs for transaction submission & proof status. Basic TypeScript SDK. | Full-featured API suite with webhook support. Enhanced SDKs for web & mobile. | White-labeled API gateway. Custom SDK integrations. Dedicated technical account manager. |
Security & Compliance | Internal audit & testing. Basic fraud proof mechanism. | Formal audit by a top-tier security firm. Enhanced data availability layer. | Continuous security monitoring. Optional KYC/AML proof integration. Quarterly audit reviews. |
Deployment & Go-Live Support | Deployment to testnet. Documentation & basic integration guide. | Mainnet deployment assistance. 2-week launch support window. | Phased production rollout strategy. 24/7 on-call support for first month. |
Estimated Investment | $50K - $80K | $80K - $150K | Custom (Contact for Quote) |
how-we-deliver
SECURE FOUNDATIONS
Custom Smart Contract Development
Build production-grade smart contracts with battle-tested security and gas optimization.
We architect and deploy secure, auditable smart contracts that form the core logic of your Web3 application. Our development process is built on industry-standard security practices and a proven audit-first methodology.
- Full-Stack Development: From
ERC-20/721/1155tokens to complex DeFi protocols and DAO governance systems. - Security-First: Code reviews, formal verification, and integration with leading audit firms before mainnet deployment.
- Gas Optimization: Expert-level Solidity to minimize transaction costs and maximize user savings.
- End-to-End Ownership: We deliver fully documented source code, test suites, and deployment scripts.
Move from concept to a secure, audited mainnet deployment in as little as 4-6 weeks.
tech-stack
ARCHITECTURE & SECURITY
Technology & Protocol Foundation
Our privacy-first expense aggregation platform is built on a robust, battle-tested technology stack designed for enterprise-grade security and scalability. We provide the foundational infrastructure so you can focus on your core business logic.
04
Privacy-Preserving Data Schema
Structured Merkle tree design for efficient proof generation on encrypted expense entries. Supports selective disclosure for compliance audits without exposing the entire dataset, ensuring GDPR & financial regulation readiness.
05
High-Performance Prover Network
Horizontally scalable proving node infrastructure built in Rust/Go to maintain consistent sub-2 second proof times under load. Delivers the performance required for real-time expense reporting.
06
Enterprise-Grade Security Posture
Full-stack security from circuit design to API endpoints. Includes formal verification of critical circuits, penetration testing, and adherence to SOC 2 Type II controls for institutional clients.
Architecture Decision Matrix
ZK-Rollup vs. Alternative Approaches
A technical comparison of privacy-first expense aggregation solutions, evaluating security, scalability, and operational complexity to inform your infrastructure choice.
| Architecture | ZK-Rollup (Our Solution) | Optimistic Rollup | Sidechain | Base Layer (L1) |
|---|---|---|---|---|
Privacy Guarantee | Full transaction privacy via ZK-SNARKs | None (transactions public) | None (transactions public) | None (transactions public) |
Data Availability | On-chain (Ethereum) | On-chain (Ethereum) | Off-chain (operator) | On-chain (Ethereum) |
Withdrawal Finality | < 10 minutes | 7-day challenge period | Instant | Instant |
Throughput (TPS) | 2,000+ | ~500 | 5,000+ | < 30 |
Gas Cost per Tx | $0.01 - $0.05 | $0.10 - $0.20 | $0.001 - $0.01 | $5 - $50 |
Security Model | Ethereum + Cryptographic Proofs | Ethereum + Economic Games | Independent Validator Set | Ethereum Consensus |
Implementation Complexity | High (requires ZK expertise) | Medium | Low | Low |
Audit & Compliance | Built-in for expense data | Manual reporting required | Manual reporting required | Manual reporting required |
Time to Production | 8-12 weeks (with Chainscore) | 6-10 weeks | 4-8 weeks | 2-4 weeks |
ZK-Rollup Privacy-First Expense Aggregation
Frequently Asked Questions
Get clear answers on our development process, security, and timelines for building a private expense aggregation layer.
A production-ready MVP typically deploys in 4-6 weeks. This includes core smart contracts, the ZK-Rollup circuit, and a basic dashboard. Complex integrations with existing ERP or accounting systems can extend this to 8-10 weeks. We provide a detailed sprint-by-sprint roadmap after the initial technical discovery.
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