[log] print a message in validator if consensus reached

This will help node runners check the status in the validator's local log.

Signed-off-by: Leo Chen <leo@harmony.one>

consensus/consensus.go

@@ -641,3 +641,8 @@ func (consensus *Consensus) GetLeaderPubKey() *bls.PublicKey {
 func (consensus *Consensus) GetNumPeers() int {
 	return len(consensus.PublicKeys)
 }
+
+// GetConsensusID returns the consensus ID
+func (consensus *Consensus) GetConsensusID() uint32 {
+	return consensus.consensusID
+}

node/node_handler.go

@@ -281,7 +281,10 @@ func (node *Node) PostConsensusProcessing(newBlock *types.Block) {
 	utils.GetLogInstance().Info("PostConsensusProcessing")
 	if node.Consensus.IsLeader {
 		node.BroadcastNewBlock(newBlock)
+	} else {
+		utils.GetLogInstance().Info("BINGO !!! Reached Consensus", "ConsensusID", node.Consensus.GetConsensusID())
 	}
+
 	node.AddNewBlock(newBlock)
 
 	// TODO: enable drand only for beacon chain