Caching VAT and FX Rates at Build Time, Not on the Request Path

Two ways to get exchange rates or VAT tables into an application, and both are wrong in a familiar way. Call a rates API on every request or every checkout, and you’ve added latency plus a new third-party dependency to a path where a customer is trying to pay you money. Or hardcode a { GBP: 0.86, CHF: 0.94 } object in source once, and it drifts... Weiterlesen