From 91ddf7ea98b97766ebd90a920e18e345d7b9c761 Mon Sep 17 00:00:00 2001
From: softsimon <softsimon@protonmail.com>
Date: Mon, 24 Jun 2024 17:10:33 +0900
Subject: [PATCH] Fix tx position crash

---
 .../app/components/mempool-blocks/mempool-blocks.component.ts   | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/frontend/src/app/components/mempool-blocks/mempool-blocks.component.ts b/frontend/src/app/components/mempool-blocks/mempool-blocks.component.ts
index b4d698bb2..13608bb73 100644
--- a/frontend/src/app/components/mempool-blocks/mempool-blocks.component.ts
+++ b/frontend/src/app/components/mempool-blocks/mempool-blocks.component.ts
@@ -412,7 +412,7 @@ export class MempoolBlocksComponent implements OnInit, OnChanges, OnDestroy {
   }
 
   calculateTransactionPosition() {
-    if ((!this.txPosition && !this.txFeePerVSize && (this.markIndex === undefined || this.markIndex === -1)) || !this.mempoolBlocks) {
+    if ((!this.txPosition && !this.txFeePerVSize && (this.markIndex === undefined || this.markIndex === -1)) || !this.mempoolBlocks?.length) {
       this.arrowVisible = false;
       return;
     } else if (this.markIndex > -1) {