Introduction
Imagine you want to buy a single item online or pay for a service just once. You need a way to send money that happens only one time, without setting up ongoing charges or subscriptions.
Think of buying a coffee at a café. You pay the barista once for your drink, and that’s it. You don’t have to pay every day unless you come back and buy again.
┌───────────────┐ ┌───────────────┐
│ Buyer │──────▶│ Payment │
│ (Customer) │ │ Processor │
└───────────────┘ └───────────────┘
│
▼
┌───────────────┐
│ Seller │
│ (Merchant) │
└───────────────┘