Replace 3 stub RPCs with real implementations: - get_system_status: fan-out gRPC health checks to all backends, reports SystemStatus - get_health_check: fan-out checks with response time measurement, returns HealthCheck entries - get_metrics: queries Prometheus for requested metric names MonitoringServiceHandler now accepts backend URLs via with_backends() builder. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
api_gateway
API Gateway service with 6-layer authentication, RBAC, rate limiting, and gRPC proxy routing.
Key Types
ApiGatewayService-- main service implementationRoleBasedAccessControl-- RBAC authorizationRateLimiter-- 3-tier rate limiting (auth/trading/compute)CircuitBreaker-- upstream service protection
Configuration
JWT_SECRET-- JWT signing secret (min 32 chars)UPSTREAM_TRADING_URL-- trading service gRPC endpointUPSTREAM_ML_URL-- ML service gRPC endpoint
Features
mfa(default) -- multi-factor authentication support- Build without:
cargo check -p api_gateway --no-default-features --features minimal