# Review of Smart Rollups Inbox

## Remarks

1. Disable SCORU when error in `begin_application`, `finalize_application` and `init_inbox` (at migration).
- Add a fct helper to disable scoru.
2. Migration to N: take care of `EoL/SoL/Info_level` (check and/or fix). Ok for M.
3. Evaluate gas cost of `add_messages` for different message position, if delta < 100, ok.
4. Make cost of `add_messages` not depend on position.