> For the complete documentation index, see [llms.txt](https://docs.crossfimain.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.crossfimain.com/english/announcement/let-the-countdown-begin.md).

# Let the countdown begin!

<figure><img src="/files/sxA9ayqel6NdHazMC753" alt=""><figcaption></figcaption></figure>

![🔥](https://abs-0.twimg.com/emoji/v2/svg/1f525.svg) CrossFi Swap Opportunity (CSO) is a 1-day-only Swap-and-Burn event that allows users to earn liquidity and profits as an investor in CrossFi. Barter your [$CRFI](https://twitter.com/search?q=%24CRFI\&src=cashtag_click) tokens for cFILs (1:1 pegged synthetic filecoin) and earn amazing interests [#Filecoin](https://twitter.com/hashtag/Filecoin?src=hashtag_click)<br>