MegaTicketing is designed to handle high-concurrency environments and is resistant to automated abuse, state corruption, and denial-of-service (DDoS).

• Edge Layer: Cloudflare Workers intercept requests at the edge. The seatmap-cache.js worker aggressively caches read-heavy endpoints, absorbing traffic spikes before they hit the origin.
• WAF: cloudflare_filter and cloudflare_firewall_rule enforce managed challenges for IP addresses exhibiting bot-like behavior or invalid HTTP verbs.
• Application Layer: Fastify's native rate limiter acts as a secondary defense mechanism.

• Distributed Locking: Lua scripts in Redis prevent race conditions.
• Database Partitioning: PostgreSQL Hash Partitioning on the eservations table mitigates row-level lock contention during massive concurrent insertions.
• Webhook Idempotency: Stripe webhook payloads are parsed as raw Buffer objects for cryptographic signature verification, preventing replay attacks and payload tampering.

• Least Privilege: The production Dockerfile executes the API as the ode user, denying root access to the containerized environment.
• Supply Chain: The CI/CD pipeline enforces Snyk for Software Composition Analysis (SCA).

Reports concerning Redis lock bypassing, JWT token forging, Database isolation failures, or Webhook signature circumvention should be submitted via GitHub Issues.