[relay] Support uncached resolve #161
Description
GCP and AWS are having issues communicating with the Mainline DHT. To get around this, all pkarr traffic could be redirected via relay in a different cloud.
Currently, the relay only supports cached resolve queries. resolve_most_recent() is not supported but is an important part of the client.
For republishing, the homeserver is dependent on resolving the users current packet with resolve_most_resent(). CAS will prevent the publishing of older packets but the republishing would still not succeed.
Adding an uncached resolve to the relay is obviously a more expensive operation. I see two ways to accomplish this:
- Extend the config.toml so one can disable the cache. Practically, this relay would likely need to be gatekept from public access.
- Add an option to the relay for uncached queries. This would need to be added cleverly to keep ensure compatibility with old pkarr clients + one needs to think about how to rate limit this api separately.