The condition a RemoteSite implementation raises when a transport,
authentication, or timeout failure stops it from answering. This is
not the same event as returning NA, which means the requested
theta is non-evaluable at a site that answered perfectly well; see
the contract in RemoteSite. Raising it aborts the round rather
than silently changing the set of sites being summed over.
Arguments
- message
what went wrong, for the caller.
- site
optionally, the Site that was unreachable; its name is added to the message by
master_aggregate().- parent
optionally, the underlying condition (an
httr2error, say) to chain for debugging.
Value
nothing — called for its side effect of signaling a
condition of class homomorpheR_site_unavailable.
What the re-raised condition carries
When master_aggregate() or decrypt() re-raise this, the
condition they signal carries a site_name field and not the
site object. A LocalSite would drag its data, and under threshold
keys its key share, into anything that logs or serializes the
condition. Catch on the class and read cnd$site_name.