[tor-dev] tor weather warning tor ops about expiring signing keys?

[nusenu]

Hi,

I'm wondering if a service like a future tor weather could have an
additional check to warn relay ops about key expiry:
(something like "Email me when the router's signing key is about to
expire")

Do relays disclose the fact that they are run via OfflineMasterKey 1?
Do dir auths/tor clients see when a currently used signing key is about
to expire?

thanks