From e02924e8dda4127f35dfc23110c4302f6bbd2a2e Mon Sep 17 00:00:00 2001
From: softsimon <softsimon@protonmail.com>
Date: Mon, 13 Apr 2020 02:43:43 +0700
Subject: [PATCH] Another bugfix related to the mempool transaction
 subscription.

---
 .../src/app/components/transaction/transaction.component.ts  | 2 +-
 frontend/src/app/services/websocket.service.ts               | 5 ++++-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/frontend/src/app/components/transaction/transaction.component.ts b/frontend/src/app/components/transaction/transaction.component.ts
index 412a865d4..78eacbed6 100644
--- a/frontend/src/app/components/transaction/transaction.component.ts
+++ b/frontend/src/app/components/transaction/transaction.component.ts
@@ -56,7 +56,7 @@ export class TransactionComponent implements OnInit, OnDestroy {
           ),
         );
       }),
-      flatMap(() => {
+      switchMap(() => {
         let transactionObservable$: Observable<Transaction>;
         if (history.state.data) {
           transactionObservable$ = of(history.state.data);
diff --git a/frontend/src/app/services/websocket.service.ts b/frontend/src/app/services/websocket.service.ts
index a64a35bc0..34d14c1e0 100644
--- a/frontend/src/app/services/websocket.service.ts
+++ b/frontend/src/app/services/websocket.service.ts
@@ -129,6 +129,9 @@ export class WebsocketService {
   }
 
   startTrackTransaction(txId: string) {
+    if (this.isTrackingTx) {
+      return;
+    }
     this.websocketSubject.next({ 'track-tx': txId });
     this.isTrackingTx = true;
   }
@@ -139,7 +142,7 @@ export class WebsocketService {
   }
 
   stopTrackingTransaction() {
-    if (this.isTrackingTx === false) {
+    if (!this.isTrackingTx) {
       return;
     }
     this.websocketSubject.next({ 'track-tx': 'stop' });