> For the complete documentation index, see [llms.txt](https://fogcomputingchain.gitbook.io/fog-computing-chain/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://fogcomputingchain.gitbook.io/fog-computing-chain/design-principles/the-layer2-scheme.md).

# The Layer2 scheme

FOGR is also the Layer 2 extension solution built on optimistic rollups (ORU), and FOGR runs a EVM compatible virtual machine called OVM that allows the execution of the same smart contracts as on Ethereum.