OptionalcipherMLS cipher suite id from the Welcome struct.
OptionalepochGroup epoch from the previewed GroupInfo.
Decrypted group metadata, or null when unavailable.
OptionalkeyKind-30443 KeyPackage event id this Welcome consumed, if tagged.
OptionalrecipientNumber of recipients the Welcome targets.
Group relay URLs from the Welcome's relays tag.
Everything that can be surfaced about an invite before committing to join — see MarmotClient.previewWelcome. The rumor-level fields decode without key material;
grouprequires decrypting the Welcome with a held KeyPackage and is null when none matches or the decode fails.