Emit Decide for genesis

crates/task-impls/src/consensus.rs

@@ -507,9 +507,30 @@ impl<TYPES: NodeType, I: NodeImplementation<TYPES>, A: ConsensusApi<TYPES, I> +
 
                 let consensus = self.consensus.upgradable_read().await;
 
-                // Construct the leaf.
+                // Get the parent leaf.
                 let parent = if justify_qc.is_genesis {
-                    self.genesis_leaf().await
+                    // Send the `Decide` event for the genesis block if the justify QC is genesis.
+                    let leaf = self.genesis_leaf().await;
+                    match leaf {
+                        Some(ref leaf) => {
+                            self.output_event_stream
+                                .publish(Event {
+                                    view_number: TYPES::Time::genesis(),
+                                    event: EventType::Decide {
+                                        leaf_chain: Arc::new(vec![leaf.clone()]),
+                                        qc: Arc::new(justify_qc.clone()),
+                                        block_size: None,
+                                    },
+                                })
+                                .await;
+                        }
+                        None => {
+                            error!(
+                                "Failed to find the genesis leaf while the justify QC is genesis."
+                            );
+                        }
+                    }
+                    leaf
                 } else {
                     consensus
                         .saved_leaves