Develop A Shopify Node JS API Middleware |Development| Zarthi

Design and implement a Node.js middleware layer for Shopify apps that centralizes authentication, request validation, rate-limit handling, logging, and error normalization. This is a core building block for Zarthi-grade, production-ready Shopify services.

Production Enhancements

Redis-based rate limiting

Structured logs (Winston / Pino)

Circuit breaker for Shopify API

Request tracing (OpenTelemetry)

Webhook signature middleware

Best Practices (Zarthi)
Always store sessions server-side
Normalize Shopify API errors
Retry on 429 with backoff
Use GraphQL cost analysis
Isolate middleware per responsibility

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