Polygon is a sidechain that uses a modified Tendermint PoS consensus mechanism for transaction ordering/inclusion.
It features two chains:
- Heimdall Chain - responsible for selecting Bor validator sets and checkpointing balances back to the main chain (Ethereum)
- Bor Chain - responsible for executing smart contracts and producing blocks.
- Polygon PoS Chain (Apr 2021, Finematics)
- Polygon: L2 or not L2? (June 2021)
- a brief summary of the behavior of Polygon as a sidechain, plus some discussion of the Polygon SDK for building new blockchains.
- Polygon architecture overview
- Awesome Polygon
- Polygon ecosystem survey (Aug 2021, The Tie)