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CEX Compliance Engine — AML Transaction Monitoring and SAR Filing

Architecture — FinCEN's BSA/AML requirements for cryptocurrency exchanges (MSB registration required for US operators) mandate transaction monitoring, SAR filing, and CTR filing. Here is the production compliance engine architecture.

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Overview

FinCEN's BSA/AML requirements for crypto exchanges include: MSB registration (Form 107), written AML program with designated compliance officer, CTR filing for transactions over $10,000, SAR filing for suspicious transactions over $5,000 within 30 days, and Travel Rule (FinCEN 1073) for transfers over $3,000. Productio...

  • FinCEN BSA/AML
  • Transaction monitoring
  • SAR filing automation
  • CTR reporting

Technical deliverables

  • › Auditable smart contract source code (verifiable)
  • › Test suite with CI integration
  • › Deployment scripts and infra as code
  • › Monitoring dashboard and runbooks

Integrations

Common integrations: The Graph, Alchemy/Infura, OpenZeppelin Defender, and popular wallet providers.

Timeline

  1. 1

    Discovery

    1-2 weeks

    Clarify requirements, compliance needs, architecture risks, and launch goals.

  2. 2

    Build

    3-8 weeks

    Implement core contracts, integrations, product flows, tests, and deployment automation.

  3. 3

    Launch

    1-2 weeks

    Run QA, prepare audit handoff, deploy infrastructure, and support production rollout.

Frequently asked questions

Chainalysis and TRM Labs are the two dominant blockchain analytics providers. Alternatives: Elliptic, CipherTrace (acquired by Mastercard). For smaller exchanges with limited budgets: Scorechain and Crystal Blockchain offer lower-cost options. All require API integration into your transaction monitoring pipeline. Cost: $50,000–$250,000 annually depending on transaction volume and contract terms.

Quick estimate

Small module: 2–4 weeks · Medium: 6–10 weeks · Large: 10+ weeks

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Focus Areas

  • FinCEN BSA/AML
  • Transaction monitoring
  • SAR filing automation
  • CTR reporting

Project Details

  • Security
  • 10 min read
  • Architecture planning
  • Implementation support

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