How is Sri Lanka recovering from its economic crisis?

Just a year and a half ago, the world witnessed widespread political violence in a country that was almost bankrupt due to a severe economic crisis. But the overall situation of the island nation of Sri Lanka is now quite stable.

In addition to overcoming the food and energy crisis, the country's foreign exchange reserves are now on the rise.

What are the reasons and principles behind the story of Sri Lanka's comeback from the ruins?