Rollup Finality

Rollup Finality refers to the point in time when a transaction processed on a layer-two rollup is considered immutable and confirmed on the underlying layer-one blockchain. Because rollups rely on the security of the base chain, achieving finality requires the submission of proofs or data to the mainnet.

This process involves a trade-off between speed and security; faster finality usually requires less rigorous verification, while slower finality offers higher guarantees. Understanding the mechanics of finality is critical for users and developers who need to know when their assets are truly secure.

It also impacts market microstructure, as liquidity providers and traders must account for the time it takes to reach finality when managing their positions and risk.