Relayer

The relayer's responsibility is to fetch validated blocks from the sequencer and pass them along to the DA layer. Because the sequencer's block times are much faster than those of the DA, the relayer batches the ordered data from multiple sequencer blocks before compressing it and submitting it to the DA.

The individual sequencer blocks can also be fetched by the Conductor before the relayer has submitted them to the DA. This enables fast finality for an improved UX, acting as soft commits for the execution layer. The collections of data sent to the DA layer by the relayer are used as a source of truth and are ultimately pulled from the DA to be used as firm commits for finality in the rollups.