From 0d79de61a2661087e95af515ecdf952b3bd1246e Mon Sep 17 00:00:00 2001
From: Dennis Won <jhwon0820@gmail.com>
Date: Fri, 9 Aug 2019 12:13:07 -0700
Subject: [PATCH] added error handling for the case when msg was not able to
 extracted from tx during throttling tx

---
 node/worker/worker.go | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/node/worker/worker.go b/node/worker/worker.go
index 220961486..7e5d62b52 100644
--- a/node/worker/worker.go
+++ b/node/worker/worker.go
@@ -128,7 +128,10 @@ func (w *Worker) SelectTransactionsForNewBlock(newBlockNum uint64, txs types.Tra
 
 			} else {
 				selected = append(selected, tx)
-				recentTxsStats[newBlockNum][sender]++
+				// handle the case when msg was not able to extracted from tx
+				if len(sender.String()) > 0 {
+					recentTxsStats[newBlockNum][sender]++
+				}
 			}
 		}