Struct DeviceListDelta 

pub struct DeviceListDelta {
    pub changed: Vec<String>,
    pub left: Vec<String>,
}

The device_lists object of a sync window: mxids, sorted and de-duplicated.

Fields

changed: Vec<String>

Visible users whose device list changed in the window, plus users who NEWLY share an encrypted room with the caller (Matrix: “or who now share an encrypted room with the client since the previous sync”) — the client has never queried their keys.

left: Vec<String>

Users who no longer share any room with the caller: they left/were banned from a shared room, or the caller itself left the room. A user still sharing another room is never listed.