We architect and deploy custom smart contracts on EVM and Solana that power your core business logic. Our contracts are built for high-frequency trading, NFT minting, and DeFi protocols with gas optimization and upgradability in mind.
Smart Contract Sanctions Screening
Smart Contract Development
Secure, production-ready smart contracts built for scale and compliance.
- Security-First Development: Code is written in
Solidity 0.8+orRust, followingOpenZeppelinstandards and undergoing rigorous internal audits before deployment. - Full Lifecycle Support: From initial design and
Hardhat/Anchortesting to mainnet deployment and post-launch monitoring viaChainscore. - Measurable Outcomes: Achieve >99.9% uptime, gas costs reduced by 15-40%, and a production-ready MVP in 2-4 weeks.
Core Capabilities of Our Sanctions Screening System
Our on-chain sanctions screening system is engineered for the unique demands of Web3, providing real-time, automated compliance that scales with your protocol's growth.
Real-Time On-Chain Monitoring
Continuous scanning of wallet addresses and transactions against global sanctions lists (OFAC, UN, EU) with sub-second latency. Prevents non-compliant interactions before they are finalized on-chain.
Modular Risk Engine
A configurable rules engine that allows you to define custom risk parameters, screening thresholds, and automated actions (block, flag, alert) based on your jurisdiction and risk appetite.
Enterprise-Grade Uptime & Security
Built with multi-region redundancy and a 99.9% uptime SLA. All data is encrypted in transit and at rest. Our screening logic is independently audited for security and accuracy.
Seamless Protocol Integration
Deploy with a simple API or smart contract hook. Supports all major EVM chains (Ethereum, Polygon, Arbitrum) and non-EVM environments. No protocol redesign required.
Comprehensive Audit Trail
Automated logging of all screening decisions with immutable proof for regulators. Generate compliance reports on-demand to demonstrate adherence to AML/CFT obligations.
Proactive List Updates
Our system automatically ingests updates from global regulatory bodies within 60 minutes of publication, ensuring your protocol is always screening against the most current sanctions data.
Business Outcomes: Mitigate Risk and Build Trust
Smart contract sanctions screening isn't just a compliance checkbox. It's a foundational layer for secure, sustainable growth. Here's how our service delivers tangible business value.
Regulatory Confidence
Deploy with confidence in regulated markets. Our screening integrates OFAC, EU, and global sanctions lists, providing auditable proof of compliance for financial partners and regulators.
Reduced Legal & Reputational Risk
Prevent illicit fund flows at the protocol level. Automated, real-time screening minimizes exposure to fines, blacklisting, and the severe brand damage associated with sanctions violations.
Enhanced Investor & Partner Trust
Signal operational maturity to VCs, custodians, and enterprise clients. A verifiable compliance framework is a key differentiator during due diligence and partnership negotiations.
Future-Proof Protocol Design
Build compliance into your core architecture. Our modular screening logic adapts to evolving global regulations, protecting your long-term roadmap from disruptive compliance overhauls.
Build vs. Buy: Custom Integration vs. Generic APIs
A technical and financial comparison of developing sanctions screening in-house versus using Chainscore's managed service.
| Factor | Build In-House | Generic API Provider | Chainscore |
|---|---|---|---|
Time to Deploy | 4-6 months | 2-4 weeks | 1-2 weeks |
Initial Development Cost | $150K - $300K+ | $5K - $20K | $25K - $75K |
Coverage Accuracy | Custom (your team's research) | 70-85% (public lists only) |
|
Smart Contract Integration | Your team builds | External API calls only | On-chain & off-chain hybrid engine |
Real-time Blocking | |||
Gas Cost per Check | High (on-chain logic) | None (off-chain) | Optimized (<$0.01 avg.) |
Ongoing List Maintenance | Full-time analyst(s) | Provider updates | Fully managed by Chainscore |
Regulatory Updates | Your legal team | Basic compliance | Proactive monitoring & patching |
Annual Total Cost (Year 1) | $300K - $600K+ | $50K - $100K | $75K - $150K |
Audit & Security Liability | Your responsibility | Shared (limited SLA) | Full indemnification available |
Our Delivery Process: From Risk Assessment to Live Monitoring
We deliver a structured, transparent process that integrates sanctions screening directly into your development lifecycle, ensuring compliance from day one without slowing you down.
1. Risk Assessment & Protocol Analysis
We conduct a deep technical audit of your smart contracts and tokenomics to identify sanctions exposure vectors. This includes analyzing governance mechanisms, cross-chain bridges, and liquidity pools for compliance gaps.
2. Custom Rule Engine Configuration
Our team configures the Chainscore Sanctions API and on-chain monitoring rules to match your specific protocol logic, jurisdiction requirements, and risk tolerance. We handle OFAC, EU, and other global lists.
3. Integration & Smart Contract Deployment
We provide SDKs and direct support to integrate screening into your minting, transfer, or swap functions. Includes deployment of upgradeable proxy contracts for future rule updates without migration.
4. Security Audit & Penetration Testing
Every integration undergoes a dedicated security review. We test for logic flaws, oracle manipulation, and gas optimization to ensure the screening layer does not become an attack vector.
5. Staging Environment Validation
We deploy and test the complete solution on a forked mainnet or testnet environment. This includes stress testing with simulated sanctioned addresses and validating all transaction reverts.
6. Live Monitoring & Alerting
Post-launch, we provide 24/7 monitoring dashboards and real-time alerts for blocked transactions, list updates, and system health. Includes monthly compliance reports and rule updates.
Smart Contract Sanctions Screening: Technical Specifications & Supported Standards
Compare our tiered service levels for integrating real-time sanctions screening directly into your smart contract logic and transaction flows.
| Specification / Feature | Starter | Professional | Enterprise |
|---|---|---|---|
Supported Blockchains | Ethereum, Polygon, Arbitrum | Ethereum, Polygon, Arbitrum, Base, Optimism | All EVM & SVM chains + Custom L2s |
Screening List Coverage | OFAC SDN, UN, EU | OFAC SDN/NS-MBS, UN, EU, UK, 5+ Jurisdictions | Global coverage: 30+ sanctions lists, PEPs, Adverse Media |
Integration Method | API Call-Out (Post-Execution) | Pre-Execution Hook + API | On-Chain Verifier Node + Pre/Post Hooks |
Screening Latency | < 500ms | < 200ms | < 50ms |
Uptime & Reliability SLA | 99.5% | 99.9% | 99.99% |
Audit Trail & Reporting | Basic Transaction Logs | Comprehensive Audit Logs + Monthly Reports | Real-Time Dashboard, Custom Reports, Regulatory Export |
Compliance Updates | Weekly | Daily | Real-Time (Sub-1 hour) |
Smart Contract Audit Support | Review of Integration | Full Security Review + Gas Optimization | Custom Circuit Design & Formal Verification |
Dedicated Support & Response | Email (48h) | Slack Channel (24h) | 24/7 Dedicated Engineer + 4h Escalation |
Starting Price (Annual) | $12,000 | $48,000 | Custom Quote |
Frequently Asked Questions on Smart Contract Sanctions Screening
Get clear answers on how our sanctions screening service integrates, operates, and scales with your protocol.
Our service integrates an on-chain oracle or a secure off-chain API with your smart contract. When a user initiates a transaction (e.g., a token transfer or swap), the contract queries our screening engine. The engine checks the user's address against real-time, aggregated sanctions lists (OFAC, UN, EU, etc.). A compliant result allows the transaction; a flagged address triggers a configurable action—like reverting the transaction or routing to a holding contract—all within the same block. We use zero-knowledge proofs for private screening where required.
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