community: spaces, an owner-signed roster with epochs, a bounded window of signed lines, bodies sealed to a rotating key when private

src-tauri/src/inbox.rs

@@ -49,6 +49,29 @@ pub enum Cargo {
     FriendAssertion(fr::FriendAssertion),
     FriendDecline([u8; 16]),
     Share(ShareCargo),
+    SpaceInvite(SpaceInvite),
+    SpaceKey(SpaceKeyCargo),
+}
+
+/// "You are on the roster now, here is where the Space is" — and, for a
+/// private Space, the epoch's key.
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct SpaceInvite {
+    pub space_id: [u8; 16],
+    pub owner: [u8; 32],
+    pub name: String,
+    pub private: bool,
+    pub epoch: u64,
+    pub key: Option<[u8; 32]>,
+}
+
+/// A rotated space key for members who stay after a removal.
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct SpaceKeyCargo {
+    pub space_id: [u8; 16],
+    pub owner: [u8; 32],
+    pub epoch: u64,
+    pub key: [u8; 32],
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
@@ -410,6 +433,8 @@ async fn dispatch(app: &tauri::AppHandle, sender: [u8; 32], cargo: Cargo) {
         Cargo::FriendAssertion(a) => crate::friends::on_inbox_assertion(app, sender, a).await,
         Cargo::FriendDecline(id) => crate::friends::on_inbox_decline(app, sender, id),
         Cargo::Share(s) => crate::shared_playlists::on_inbox_share(app, sender, s),
+        Cargo::SpaceInvite(i) => crate::spaces::on_inbox_invite(app, sender, i),
+        Cargo::SpaceKey(k) => crate::spaces::on_inbox_space_key(app, sender, k),
     }
 }