BAC-L2-TIA-110Celestia and modular blockchains
Rollup sovereignty: who decides the valid chain
The decisive difference between a rollup that can evolve its own rules and one whose fate a foreign contract arbitrates.
- Level
- L2 — Appchain developer
- Duration
- 4 h
- Maintainer
- Modular Blockchain / Celestia Architect
Learning objectives
- 01Explain where fork-choice lives in each model
- 02Describe how a sovereign rollup upgrades itself
- 03Assess what sovereignty costs in guarantees
Guided lab
Simulate a contested upgrade and determine, in each model, which chain wins.
Independent lab
Write the upgrade procedure for a sovereign rollup, dissent mechanism included.
Security angle
Sovereignty means no external recourse: internal governance becomes the last line of defence.
Assessment
Upgrade procedure assessed on how it handles dissent.