I have a thousand barrels of oil for sale. I will sell them for whatever the current quote is for that grade of oil in US dollars. I will gladly accept euros or yen or pounds or any other freely convertible currency, as long as I can convert that currency to the same amount of US dollars. I would accept the equivalent amount of live hogs, as long as I could convert them, easily, to any freely acceptable currency.
They are not enemies of the USA but I would hardly call them "friends".