announcements answered only if heads differ

1 files changed, 4 insertions, 0 deletions

diff --git a/src/transport/mod.rs b/src/transport/mod.rs
index b8b57af..25f9b7c 100644
--- a/src/transport/mod.rs
+++ b/src/transport/mod.rs
@@ -202,6 +202,10 @@ pub(crate) struct Status {
     /// The sender is shutting down: its farewell (`keepalive::farewell`). The
     /// recipient holds it dormant at once, rather than after `dormant_after` of silence.
     pub(crate) leaving: bool,
+    /// The sender announces new heads (`swarm::relay`), rather than keeping alive: a
+    /// STATUS answered only if the recipient's heads differ. Most announcements reach a
+    /// neighbour that has the changes already, which has nothing to tell.
+    pub(crate) announcing: bool,
 }
 
 /// Cheap to clone: large parts are shared (`bytes::Bytes`).