diff --git a/src/runtime/endpoint.rs b/src/runtime/endpoint.rs
index e95ca3737b1052d4557ad0dc4613c69ace0b9b6c..5bf6f48d9ee1cdcf027d9332e1c9cc8df4cba735 100644
--- a/src/runtime/endpoint.rs
+++ b/src/runtime/endpoint.rs
@@ -18,6 +18,12 @@ pub struct EndpointInfo {
     pub channel_id: ChannelId,
 }
 
+#[derive(Debug, Clone)]
+pub(crate) enum Decision {
+    Failure,
+    Success(Predicate),
+}
+
 #[derive(Clone, Debug)]
 pub(crate) enum Msg {
     SetupMsg(SetupMsg),
@@ -45,8 +51,9 @@ pub(crate) struct CommMsg {
 #[derive(Clone, Debug)]
 pub(crate) enum CommMsgContents {
     SendPayload { payload_predicate: Predicate, payload: Payload },
-    Elaborate { partial_oracle: Predicate },
-    Announce { oracle: Predicate },
+    Elaborate { partial_oracle: Predicate }, // SINKWARD
+    Failure,                                 // SINKWARD
+    Announce { decision: Decision },         // SINKAWAYS
 }
 
 pub struct NetworkEndpoint {