BAC-L3-XCHAIN-109Interoperable systems engineering
Data availability as an interoperability substrate
Two chains publishing to the same data layer can verify each other without a bridge: an often-overlooked route.
- Level
- L3 — Infrastructure engineer
- Duration
- 3 h
- Maintainer
- Chief Blockchain Architect
Learning objectives
- 01Explain how a shared data layer eases verification
- 02Compare that approach with a classical bridge
- 03Identify its real limits
Guided lab
Have one rollup verify another's state from their shared data layer.
Independent lab
Document what this approach does not solve, and what it still requires.
Security angle
Publishing to the same place does not make states mutually valid: availability is not validity.
Assessment
Cross-verification demonstration plus a limits note.