StarkEx is the L2 scalability engine, ex:
Future Plan
Step I — Planets: Single-App Rollups
The StarkNet framework will include the following:
Mechanisms needed to generate STARK proofs for arbitrary Cairo logic, and then submit and verify them on Ethereum. Interactions with L1 Ethereum Deposits and withdrawals of L1 tokens Publishing of the on-chain data Escape Mechanisms protecting StarkNet users from malicious StarkNet operators, etc. Management of the L2 user balances, and of the application’s storage and memory. Step II — Constellations: Multi-App Rollups
The next step will support multiple applications running on the same StarkNet instance and accessing the same global L2 state. This will enable interoperability between different applications, as well as reduced gas cost due to improved economies of scale.