Great use case, but what we see here is using the Tando app to accept Sats, while Tando then pays Carrefour with Kenyan shillings.

Carrefour did not actually receive Sats, and can't spend Sats. It is a step in the right direction, but Carrefour can actually directly accept Sats without worrying about Volatility as a fiat-run business by using "Fiat Lightning channels" and running its own infrastructure.

Very easy, no reliance on any third-party swaps and conversions.