I believe the Merchant (Payee) and User (Payer) can choose whatever currency they want to put in their wallet, and it's up to the Exchange to do the conversion.

I believe the Merchant (Payee) and User (Payer) can choose whatever currency they want to put in their wallet, and it's up to the Exchange to do the conversion. The nice thing is that the payer is anonymous while the merchants account is visible, so it is likely to be accepted by nation states that still want to track taxable transactions.