This Canadian author in my opinion is one of the best independent international journalists. In this very informative report he helps us untangle the complications of the latest dangerous moves by the Empire to destabilize Iran.
...the Iranians originally wanted to turn to the euro and a petro-euro system with the hope that the competition between the American dollar and the euro would make the European Union an Iranian ally and de-link the E.U from the United States. As political tensions have mounted with the E.U., the petro-euro has become less and less alluring for Tehran. Iran has realized that the European Union is submissive to U.S. interests under corrupt leaders. Thus, to a lesser extent Iran has also tried to move away from the euro too.