> For the complete Linea documentation index, see [llms.txt](/llms.txt). > Agents can fetch this page as Markdown at [https://docs.linea.build/reference/smart-contracts.md](https://docs.linea.build/reference/smart-contracts.md). # Smart contracts This section documents the Lineth smart contract interfaces and implementations. These pages are generated from the Lineth contract source. On Linea Mainnet, the finalization contract is `LineaRollup` on Ethereum. A custom deployment can deploy these contracts at its own addresses, or deploy an equivalent that satisfies the interfaces its finalization design requires. See [Smart contracts](/protocol/architecture/smart-contracts) for how the contracts fit the protocol. The sidebar groups this reference into interfaces, libraries, the rollup, the message service, and the token bridge.