We architect and deploy custom Solidity and Rust smart contracts that form the backbone of your protocol. Our development process is built on security-first principles, utilizing battle-tested libraries like OpenZeppelin and implementing comprehensive unit and integration testing before any code touches mainnet.
LABS
Services
Cross-Border Tax Rule Engine Integration
Integrate a dynamic rules engine that automatically applies the correct tax treatment (income, capital gains, withholding) to tokenized asset transactions based on the jurisdictions of the transacting parties and assets.
Chainscore © 2026
overview
CORE SERVICE
Smart Contract Development
Secure, production-ready smart contracts built by Web3-native engineers.
- Full Lifecycle Development: From initial design and
Hardhat/Foundrysetup to deployment, verification, and monitoring. - Gas Optimization: Expert-level code reviews to reduce transaction costs by 15-40%.
- Security Audits: All contracts undergo internal review against OWASP Top 10 and are prepared for third-party audits.
- Multi-Chain Ready: Deployments optimized for
EVMchains (Ethereum, Polygon, Arbitrum) andSolana.
We deliver auditable, maintainable code that scales. Your smart contracts are your product's foundation—we build them to last.
key-features-cards
ENTERPRISE-GRADE COMPLIANCE
Core Capabilities of Our Tax Rule Engine
Our engine delivers deterministic tax calculations for cross-border crypto transactions, eliminating compliance risk and operational overhead. Built for global scale and regulatory complexity.
02
Automated Cost-Basis & Gain/Loss Tracking
FIFO, LIFO, and HIFO accounting across wallets and exchanges. Calculates realized/unrealized gains in fiat equivalents for accurate tax reporting and portfolio management.
100%
Audit Trail
FIFO/LIFO/HIFO
Methods
04
Enterprise-Grade Data Integration
Seamless API integration with major exchanges (Coinbase, Binance), wallets, and on-chain data providers. Normalizes fragmented data into a single source of truth.
50+
Exchange APIs
Sub-Second
Sync Speed
05
Audit-Ready Reporting & Filing
Generate jurisdiction-specific tax forms (IRS 8949, HMRC SA108), comprehensive transaction ledgers, and audit reports. All data is cryptographically verifiable.
IRS, HMRC
Forms
One-Click
Generation
06
Privacy-First Architecture
Client data is encrypted in transit and at rest. Our zero-knowledge proof architecture allows for tax computation without exposing raw transaction details.
SOC 2
Compliant
ZK-Proofs
Optional
benefits
DELIVERABLES
Business Outcomes: Scale with Confidence, Not Complexity
Our integration delivers more than just code. We provide the technical foundation and operational certainty you need to expand globally without the typical compliance overhead.
01
Automated Global Tax Compliance
Integrate a single API to automatically apply VAT, GST, and sales tax rules for over 150 jurisdictions. Eliminate manual rule maintenance and reduce compliance risk.
150+
Jurisdictions Covered
Real-time
Rule Updates
02
Reduced Settlement & Reconciliation Time
Direct blockchain-native integration means tax calculations happen on-chain at transaction time. Slash settlement cycles from days to minutes and eliminate post-trade reconciliation.
90%
Faster Settlement
Near-zero
Reconciliation Effort
03
Enterprise-Grade Security & Audit Trail
Every calculation is cryptographically verified and immutably logged on-chain. Provides a tamper-proof audit trail for regulators and simplifies financial reporting.
100%
Immutable Logging
SOC 2
Compliant Infrastructure
04
Faster Time-to-Market for New Regions
Launch your product in new countries in weeks, not months. Our pre-built, maintained rule engine handles local regulatory complexity, so your engineering team can focus on core features.
< 4 weeks
New Region Launch
0
Local Legal Retainers Needed
Choose the right implementation path for your compliance needs
Phased Integration Tiers
Our modular integration approach allows you to start with core compliance and scale to full automation. Compare service levels, support, and pricing to match your operational complexity and volume.
| Feature / Capability | Compliance Foundation | Operational Scale | Enterprise Automation |
|---|---|---|---|
Global Tax Rule Engine (200+ Jurisdictions) | |||
Real-Time Liability Calculation | |||
Automated Reporting (VAT, GST, Sales Tax) | |||
Cross-Border Transaction Monitoring | |||
Custom Rule Logic & Whitelabeling | |||
Direct ERP/Accounting System Sync | |||
Implementation & Onboarding Support | Guided Self-Service | Dedicated Technical Lead | Full Project Management |
API Support & SLA | Business Hours | 24/7 with 12h Response | 24/7 with 1h Response & Escalation |
Annual Compliance Updates | Manual Review Required | Automated Updates | Automated Updates + Advisory |
Typical Implementation Timeline | 4-6 weeks | 8-12 weeks | 12-16 weeks |
Estimated Annual Investment | $25K - $75K | $100K - $250K | Custom Quote ($300K+) |
how-we-deliver
CORE SERVICE
Smart Contract Development
Secure, production-ready smart contracts built for scale and compliance.
We architect and deploy custom smart contracts on EVM and Solana with a focus on security-first development. Every contract undergoes rigorous internal audits and follows OpenZeppelin standards, ensuring your core logic is resilient against exploits.
- Custom Tokenomics & DeFi Logic: Design and implement
ERC-20,ERC-721, and bespoke protocols for staking, lending, or governance. - Gas Optimization: We write efficient code to reduce transaction costs by up to 40%, critical for user adoption.
- Full Audit Trail: Deliverables include comprehensive documentation, test suites with >95% coverage, and a clear path to third-party audits from firms like
CertiKorQuantstamp.
From a 2-week MVP to a mainnet launch, we provide the technical foundation that VCs and users trust. Our contracts power applications handling over $500M in cumulative value.
Cross-Border Tax Integration
Frequently Asked Questions
Get clear answers on how we deliver secure, compliant tax rule engines for global crypto businesses.
We deliver a production-ready, audited tax rule engine in 4-6 weeks for standard integrations. This includes requirements analysis, smart contract development, security audit, and deployment to your testnet/mainnet. Complex multi-jurisdiction logic or custom oracle integrations may extend this to 8-10 weeks.
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