feat(consensus): add try_sync to context API

crates/sequencing/papyrus_consensus/src/test_utils.rs

@@ -90,6 +90,8 @@ mock! {
             precommits: Vec<Vote>,
         ) -> Result<(), ConsensusError>;
 
+        async fn try_sync(&mut self, height: BlockNumber) -> bool;
+
         async fn set_height_and_round(&mut self, height: BlockNumber, round: Round);
     }
 }

crates/sequencing/papyrus_consensus/src/types.rs

@@ -112,6 +112,10 @@ pub trait ConsensusContext {
         precommits: Vec<Vote>,
     ) -> Result<(), ConsensusError>;
 
+    /// Attempt to learn of a decision from the sync protocol.
+    /// Returns true if a decision was learned so consensus can proceed.
+    async fn try_sync(&mut self, height: BlockNumber) -> bool;
+
     /// Update the context with the current height and round.
     /// Must be called at the beginning of each height.
     async fn set_height_and_round(&mut self, height: BlockNumber, round: Round);

crates/sequencing/papyrus_consensus_orchestrator/src/papyrus_consensus_context.rs

@@ -301,6 +301,11 @@ impl ConsensusContext for PapyrusConsensusContext {
         Ok(())
     }
 
+    async fn try_sync(&mut self, _height: BlockNumber) -> bool {
+        // TODO(Asmaa): Implement this.
+        todo!()
+    }
+
     async fn set_height_and_round(&mut self, _height: BlockNumber, _round: Round) {
         // No-op
     }

crates/sequencing/papyrus_consensus_orchestrator/src/sequencer_consensus_context.rs

@@ -339,6 +339,11 @@ impl ConsensusContext for SequencerConsensusContext {
         Ok(())
     }
 
+    async fn try_sync(&mut self, _height: BlockNumber) -> bool {
+        // TODO(Asmaa): Implement sync.
+        todo!()
+    }
+
     async fn set_height_and_round(&mut self, height: BlockNumber, round: Round) {
         if self.current_height.map(|h| height > h).unwrap_or(true) {
             self.current_height = Some(height);