Does it make sense to consider ‘seconds’ for this? Block times are seconds since epoch. These times can also differ from real time by a large delta. ‘Nanoseconds’ may lead to a belief that these times are more meaningful than they are.

Yeah I don't think it's a great metric by any means, but it's consistent with how libxmtp filters through installation_ids. I'll leave it in ns for the demo but it would make sense not to use timestamp at all in libxmtp and instead use block height and log index.

I think that seconds could be used instead of nanoseconds, libxmtp doesn't check for it, so I'll experiment with that too