STEP 01
1. Auth Service Submits Urgent OTP Alert
Auth Microservice ➔ Ingestion GatewayHTTPS POST /api/v1/sendUser requests 2FA verification. The Auth service dispatches an urgent push alert payload with an Idempotency-Key header to prevent duplicate text messages or pushes on network retry.
NETWORK ACTION & GUARANTEE
ACTION: HTTP POST /api/v1/notifications/send
STATE: {"userId": "usr_bob_99", "priority": "HIGH", "channel": "ios", "template": "2FA_OTP", "code": "841029"}