#citronovastava
grave sigil
pine edge
hi! not entirely sure what you mean by "currency" here.
Currency conversion(and the rates used) is handled by Stripe and depends on the currency you pass to the API versus the currencies you can settle into.
https://stripe.com/docs/currencies
https://stripe.com/docs/payouts#supported-accounts-and-settlement-currencies
simple example being, a merchant in France charges a customer and passes currency:USD in their API request. The customer is charged in USD and that is converted by Stripe(at mid-market rate + some markup) into EUR in order to be paid out to the French merchant's bank account.