Checkpointing to Ethereum is part of Polygon’s design

https://open.substack.com/pub/vaginahsae/p/polygon-staking-guide-fees-gas-and?r=7ad624&utm_campaign=post&utm_medium=web&showWelcomeOnShare=true

Checkpointing to Ethereum is part of Polygon’s design, and validators participate in securing sidechain state commitments.