> For the complete documentation index, see [llms.txt](https://brkt-gg.gitbook.io/brkt.gg-whitepaper/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://brkt-gg.gitbook.io/brkt.gg-whitepaper/4.1-expiration-epoch.md).

# 4.1 Expiration Epoch

The expiration epoch is a built-in mechanism that allows for user refunds in PaidPredictableCompetition if the competition manager fails to progress the competition within a reasonable timeframe. This feature ensures that users' funds are protected.