diff --git a/src/runtime2/inbox2.rs b/src/runtime2/inbox2.rs
index ff2d65a34b542ca74445a72bbbb3499091ce8011..fdffe317a062dc1a0b20e61b0d22d2ae197fea79 100644
--- a/src/runtime2/inbox2.rs
+++ b/src/runtime2/inbox2.rs
@@ -29,7 +29,7 @@ pub(crate) struct DataHeader {
 }
 
 /// A data message is a message that is intended for the receiver's PDL code,
-/// but will also be handled by the consensus algrorithm
+/// but will also be handled by the consensus algorithm
 #[derive(Debug, Clone)]
 pub(crate) struct DataMessageFancy {
     pub sync_header: SyncHeader,
@@ -39,7 +39,8 @@ pub(crate) struct DataMessageFancy {
 
 #[derive(Debug)]
 pub(crate) enum SyncContent {
-
+    LocalSolution(), // sending a local solution to the leader
+    Notification, // just a notification (so message is about sending the SyncHeader)
 }
 
 /// A sync message is a message that is intended only for the consensus
@@ -47,6 +48,7 @@ pub(crate) enum SyncContent {
 #[derive(Debug)]
 pub(crate) struct SyncMessageFancy {
     pub sync_header: SyncHeader,
+    pub target_component_id: ConnectorId,
     pub content: SyncContent,
 }