BERLIN (AP) — A proposed solution to a dispute over Ukrainian natural gas debts to Moscow would see Ukraine’s gas company pay $2 billion to Russia’s Gazprom this week and trigger talks on the price Kiev should pay for future deliveries as it tries to avert a supply cutoff, a top European Union official said Monday.

EU Energy Commissioner Guenther Oettinger said after meeting the Russian and Ukrainian energy ministers in Berlin that both sides must still consult with their political leaders and the gas companies involved, and they have until Wednesday evening to approve the deal. He stressed “we are not done” but said he is optimistic of an agreement.