00 / brass elevator panel
A subterranean atlas where transactions ride below the public Layer 1 street and reappear as compressed, proven civic records.
01 / mempool lobby
Before a Layer 2 system can compress or prove anything, it collects intent: transfers, swaps, messages, and calls waiting to be ordered. The lobby is noisy, but each ticket is still legible.
02 / rollup press
Rollups batch activity off the foundation street, then publish a compact record back to Layer 1. The press does not erase history; it binds many pages into a smaller archive object.
03 / sequencer clockroom
A sequencer chooses an ordering for the waiting tickets. The stamp is not finality by itself; it is the schedule that lets the machinery produce a coherent batch.
04 / fraud window
Optimistic systems assume a batch is valid unless a watcher opens the courthouse shutters and proves a wrong step. The ticket carries a temporary coral shadow until the window closes.
05 / validity lantern
Validity systems attach compact mathematical evidence. The lantern does not trust the story; it verifies a proof that the state transition followed the rules.
06 / bridge customs
Bridges move claims, assets, and messages across jurisdictional floors. The customs desk checks which side has recognized the record and when withdrawal receipts may leave.
07 / data availability stacks
Data availability means outsiders can retrieve the ingredients needed to verify or rebuild state. Without shelves that can be opened, the proof theater becomes a sealed black box.
08 / settlement vault
Settlement is where the lower machinery writes back to the foundation slab. The journey ends as an archived record: ordered, compressed, proved or challenge-cleared, and anchored.