BAC-L3-TIA-115Celestia and modular blockchains
The sequencer: centralisation, censorship and exit
The component almost every rollup centralises, and the mechanisms that stop that centralisation becoming a power to block.
- Level
- L3 — Infrastructure engineer
- Duration
- 3 h
- Maintainer
- Modular Blockchain / Celestia Architect
Learning objectives
- 01Describe what a sequencer can and cannot do
- 02Implement a forced-inclusion mechanism
- 03Design a sequencer decentralisation trajectory
Guided lab
Simulate a sequencer censoring a user, then demonstrate forced inclusion.
Independent lab
Write the sequencer decentralisation trajectory for your own rollup.
Security angle
A single sequencer cannot steal, but it can exclude: forced inclusion is the counterweight.
Assessment
Demonstrated forced inclusion plus a documented trajectory.