It is a typical Wednesday summer evening in Delhi. Hot. Dry. Crowded. The place is Sarita Vihar. Specifically, a Red Tape store.

On the face of it, it doesn’t look like a busy day. But just then, a 30-something-year-old man walks into the store and starts looking at shoes. He is smartly dressed. In jeans and a shirt. He mumbles something about needing a size 10. The salesman points to a rack stacked with shoes and steps back. The man looks at the merchandise. Likes one. Picks it. Turns it over. Nods. Takes his phone out, taps on the Paytm* app, scans the Paytm QR code kept next to the shoes on the rack.