Something like Bitpay guarantees the exchange rate for 15 minutes between invoicing the customer and conversion to USD.
More generally, you'd outsource those risks to dedicated finance companies and handle USD: Exchange rate risk, fee calculation risk, confirmation/double-spending risk, etc. Just like in how there is an entire shell game of risks being offloaded between companies when you accept credit cards, and no merchant directly accepts credit from an unknown customer.
More generally, you'd outsource those risks to dedicated finance companies and handle USD: Exchange rate risk, fee calculation risk, confirmation/double-spending risk, etc. Just like in how there is an entire shell game of risks being offloaded between companies when you accept credit cards, and no merchant directly accepts credit from an unknown customer.