Batch Finality

Batch finality refers to the point at which a group of transactions, submitted by a rollup, is considered irreversibly confirmed on the main chain. Before finality, the transactions may be pending or subject to challenge in optimistic systems.

Once the batch is finalized, the state root is committed, and the transactions are effectively settled. This process is crucial for users who need assurance that their funds have moved or their smart contract interactions are complete.

Different scaling solutions offer varying times to finality, ranging from near-instant for ZK-rollups to several days for optimistic rollups with fraud proof windows. Achieving fast finality is a key competitive advantage for L2 protocols.

It reduces the time users must wait to withdraw assets or perform subsequent actions. Finality is the culmination of the consensus process.

It ensures that the ledger is immutable and the state is secure. It is the bridge between the high-speed L2 and the robust L1 security.