> For the complete documentation index, see [llms.txt](https://docs.bella.fi/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.bella.fi/guides/advanced-for-a-better-user-experience-as-a-state-machine/pool-state-and-transition.md).

# PoolState & Transition

A `ConfigurableCorePool` is a state machine based on the math model aka `CorePool` of Uniswap v3 contract implementation.

Every core pool state corresponds to a `PoolState`. Every interaction(`mint`, `burn`, `swap`, `collect` and `fork`) corresponds to a `Transition`. A `Record` contains information about the action. A `Transition` makes a `PoolState` move to next `PoolState` according to the `Record`.