They've migrated to a wartime economy, which gives you a lot of command over the economy. They're currently doing a careful dance of increasing their money supply, while trying to stabilize inflation using what foreign currency reserves and income they have.

The biggest thing keeping their economy going is the price of oil, which is hovering around 80-90$ a barrel. The vast majority of this is being gobbled up by the government via their national wealth fund.

So long as heightened domestic productivity is maintained for the war, and the price of oil is higher than 60-65$ they could retain solvency for years.

A real economic collapse won't be felt until the price of oil bottoms out, or if they attempt to transition out of a war time economy.