BAC-L3-COSMOS-122Cosmos SDK
Operating an IBC relayer
A relayer carries packets without being able to forge them — but if it stops, funds get stuck. Critical infrastructure with no privilege.
- Level
- L3 — Infrastructure engineer
- Duration
- 4 h
- Track
- Cosmos SDK
- Maintainer
- Cosmos Lead Architect
Learning objectives
- 01Configure and operate a relayer between two chains
- 02Monitor pending packets and clients nearing expiry
- 03Cost out running a relayer
Guided lab
Deploy a relayer, monitor it, then stop it and watch packets pile up.
Independent lab
Set up an alert for imminent client expiry and actually trigger it.
Security angle
A relayer cannot steal, but it can censor: redundancy and operator diversity.
Assessment
Monitored relayer with a working dashboard and alert.