reject and warn about too large delta blobs

1 files changed, 4 insertions, 0 deletions

diff --git a/src/swarm/blob.rs b/src/swarm/blob.rs
index 679e1c6..c13bcd9 100644
--- a/src/swarm/blob.rs
+++ b/src/swarm/blob.rs
@@ -88,6 +88,10 @@ pub(crate) struct Blobs {
 /// within Mycelium's deadline.
 const DELTA_THRESHOLD_CHUNKS: usize = 16;
 
+/// The largest sync message accepted: the threshold of a sender with the largest chunks
+/// it may have configured. Anything larger comes from a node that doesn't keep to it.
+pub(crate) const MAX_SYNC_MESSAGE: usize = DELTA_THRESHOLD_CHUNKS * MAX_CHUNK as usize;
+
 struct Prepared {
     bytes: Arc<Vec<u8>>,
     hashes: Vec<[u8; 32]>,