Rakesh Kumar on Instagram: "1️⃣ High-Level Architecture- UPI follows a distributed, multi-party architecture: —Client apps (PhonePe, GPay, Paytm) —NPCI (UPI Switch) – routing & validation —Payer Bank & Payee Bank —Settlement systems 👉 NPCI does not process money, it coordinates communication. ———- 2️⃣ Request Flow- —User initiates payment from UPI app —Request hits NPCI switch —NPCI validates request format & routes it —Payer bank checks balance & debits —Payee bank credits amount —Confirmation