Indexer | query optimization | event streaming | Rate limiting | Jest | Cypress | input validation | Event queue | reliability | Sentry | OpenTelemetry | Performance | authentication | SDK | Viem | WebSocket | Node.js | TypeScript | GraphQL | Next.js Indexer | query optimization | event streaming | Rate limiting | Jest | Cypress | input validation | Event queue | reliability | Sentry | OpenTelemetry | Performance | authentication | SDK | Viem | WebSocket | Node.js | TypeScript | GraphQL | Next.js