Dispatches / a short note
Transaction networks
Visa, Mastercard, RuPay what do they do?
Authorization, Clearning, and settlement of funds over the wire. Also about disputes and arbitration. More on: https://tautology.town/2026/06/01/card-networks.html
Discussion: https://news.ycombinator.com/item?id=49614280
Also, europe is now building European Payments Initiative, but that is similar to UPI in india (direct account to account transfer).