# cerulea-relay

Realtime non-archival relay for third-party AT Proto PDSes.

In the interest of cost control, we are scaling down the network:
- Only PDSes with fewer than 1000 repos are crawled
- We do no backfilling, only current events are relayed to consumers
- Stale data (≈ 24hrs?) is purged from the database [not doing this yet]

The idea is that we can have apps with much larger limits if we scale down the volume of the network.
- Large block sizes
- Large record size limit
- therefore: Large text field in post records, large uploads
- etcetcetc

## todo

- metrics / tracing / observability shit
- history:
  - store indexedAt values
  - purge based on ttl
  - takedowns