The public relay used to accept a shared auth key compiled into every
hub, so its bandwidth was open to anyone. The relay now issues a
per-hub credential it can meter and revoke, and hubs obtain one on
their own.
- --relay resolves an auth key at startup: HAPI_RELAY_AUTH env, then a
key persisted in settings.json, then a fresh key from the relay's
/issue endpoint. There is no shared-key fallback; if no key can be
obtained the tunnel does not start and the hub says why.
- A persisted key rejected by the relay (HTTP 403 after revocation or a
secret rotation) is discarded and replaced once, then the tunnel is
restarted, so a revoked hub recovers without manual edits. Keys given
explicitly through the environment are never overwritten.
- Issuance is rate-limited per public IP; HTTP 429 is reported with the
retry hint instead of being retried blindly, which matters for users
sharing a CGNAT or corporate egress address.
- The tunnel URL now comes from upstream tunwg's slog JSON on stderr
(msg="listener started"), replacing the fork's custom --json event,
and --log_level=0 keeps per-request logs out of the hub console.
Requires a relay running tunwg with TUNWG_AUTH_SECRET configured.
weishu