On that general note, I think the comparison point to look at for 'state of the art' in the subject would be India's just plain excellent UPI system (https://en.wikipedia.org/wiki/Unified_Payments_Interface) and all its supporting infrastructure. It's seriously great in a way that's hard to understand for people whose only context is being familiar with Western credit card or bank transfer systems. Nigh instant payment reconciliation, free and extremely convenient for individuals, operational costs small enough that it's practical for everyday micro-transactions for the poor (I'm talking on the territory of 5¢ in USD terms) which makes cashless payments extremely practical for even ordinary street merchants.