Chapter 25: Resilience, Testing, SRE & Privacy-Preserving ML

This chapter covers the engineering controls that keep web3 and embedded-finance systems correct under failure, experimentation, privacy constraints, and regional disruption. It connects test evidence, feature delivery, privacy-preserving computation, and incident operations.

• 25.1 Testing Strategy: Unit/Integration/Contract/E2E, Chaos Engineering (Litmus, Chaos Mesh)
• 25.2 Feature Flags & Experimentation Infrastructure (A/B Test Deployment)
• 25.3 Privacy Tech & Privacy-Preserving ML: Differential Privacy, Federated Learning, Homomorphic Encryption
• 25.4 SRE Practices & Incident Engineering: Runbooks, Post-Mortems, SLA/SLO/SLI Error Budgets, Incident Response, Multi-Region Disaster Recovery & Active-Active Failover
• Chapter 25 References