Electrs server status page

frontend/src/app/app-routing.module.ts

@@ -6,6 +6,7 @@ import { EightBlocksComponent } from './components/eight-blocks/eight-blocks.com
 import { MempoolBlockViewComponent } from './components/mempool-block-view/mempool-block-view.component';
 import { ClockComponent } from './components/clock/clock.component';
 import { StatusViewComponent } from './components/status-view/status-view.component';
+import { ServerHealthComponent } from './components/server-health/server-health.component';
 
 const browserWindow = window || {};
 // @ts-ignore
@@ -31,6 +32,11 @@ let routes: Routes = [
         data: { networks: ['bitcoin', 'liquid'] },
         component: StatusViewComponent
       },
+      {
+        path: 'nodes',
+        data: { networks: ['bitcoin', 'liquid'] },
+        component: ServerHealthComponent
+      },
       {
         path: '',
         loadChildren: () => import('./bitcoin-graphs.module').then(m => m.BitcoinGraphsModule),
@@ -66,6 +72,11 @@ let routes: Routes = [
         data: { networks: ['bitcoin', 'liquid'] },
         component: StatusViewComponent
       },
+      {
+        path: 'nodes',
+        data: { networks: ['bitcoin', 'liquid'] },
+        component: ServerHealthComponent
+      },
       {
         path: '',
         loadChildren: () => import('./bitcoin-graphs.module').then(m => m.BitcoinGraphsModule),
@@ -134,6 +145,11 @@ let routes: Routes = [
     data: { networks: ['bitcoin', 'liquid'] },
     component: StatusViewComponent
   },
+  {
+    path: 'nodes',
+    data: { networks: ['bitcoin', 'liquid'] },
+    component: ServerHealthComponent
+  },
   {
     path: '',
     loadChildren: () => import('./bitcoin-graphs.module').then(m => m.BitcoinGraphsModule),
@@ -173,6 +189,11 @@ if (browserWindowEnv && browserWindowEnv.BASE_MODULE === 'liquid') {
           data: { networks: ['bitcoin', 'liquid'] },
           component: StatusViewComponent
         },
+        {
+          path: 'nodes',
+          data: { networks: ['bitcoin', 'liquid'] },
+          component: ServerHealthComponent
+        },
         {
           path: '',
           loadChildren: () => import('./liquid/liquid-graphs.module').then(m => m.LiquidGraphsModule),
@@ -213,6 +234,11 @@ if (browserWindowEnv && browserWindowEnv.BASE_MODULE === 'liquid') {
       data: { networks: ['bitcoin', 'liquid']},
       component: StatusViewComponent
     },
+    {
+      path: 'nodes',
+      data: { networks: ['bitcoin', 'liquid'] },
+      component: ServerHealthComponent
+    },
     {
       path: '',
       loadChildren: () => import('./liquid/liquid-graphs.module').then(m => m.LiquidGraphsModule),

frontend/src/app/components/server-health/server-health.component.html

@@ -0,0 +1,29 @@
+<div class="tomahawk">
+  <ng-container *ngIf="(hosts$ | async) as hosts">
+    <div class="status-panel">
+      <table class="status-table table table-borderless table-striped" *ngIf="(tip$ | async) as tip">
+        <tbody>
+          <tr>
+            <th class="active"></th>
+            <th class="host">Host</th>
+            <th class="rtt">RTT</th>
+            <th class="height">Height</th>
+          </tr>
+          <tr *ngFor="let host of hosts;" (click)="scrollTo(host)">
+            <td class="active"><span *ngIf="host.active">⭐️</span></td>
+            <td class="host">{{ host.host }}</td>
+            <td class="rtt">{{ host.rtt | number : '1.0-0' }} {{ host.rtt == null ? '' : 'ms'}} {{ !host.checked ? '⏳' : (host.unreachable ? '🔥' : '✅') }}</td>
+            <td class="height">{{ host.latestHeight }} {{ !host.checked ? '⏳' : (host.outOfSync ? '🚫' : (host.latestHeight && host.latestHeight < tip ? '🟧' : '✅')) }}</td>
+          </tr>
+        </tbody>
+      </table>
+    </div>
+  </ng-container>
+
+  <ng-container *ngFor="let host of hosts; trackBy: trackByFn">
+    <h5 [id]="host.host" class="hostLink">
+      <a [href]="host.link">{{ host.link }}</a>
+    </h5>
+    <iframe class="mempoolStatus" [src]="host.statusPage"></iframe>
+  </ng-container>
+</div>

frontend/src/app/components/server-health/server-health.component.scss

@@ -0,0 +1,35 @@
+.tomahawk {
+  .status-panel {
+    max-width: 720px;
+    margin: auto;
+    margin-top: 2em;
+    padding: 1em;
+    background: #24273e;
+  }
+
+  .status-table {
+    width: 100%;
+
+    td, th {
+      padding: 0.25em;
+      &.rtt, &.height {
+        text-align: right;
+      }
+    }
+
+    td {
+      cursor: pointer;
+    }
+  }
+
+  .mempoolStatus {
+    width: 100%;
+    height: 270px;
+  }
+
+  .hostLink {
+    text-align: center;
+    margin: auto;
+    margin-top: 1em;
+  }
+}

frontend/src/app/components/server-health/server-health.component.ts

@@ -0,0 +1,68 @@
+import { Component, OnInit, ChangeDetectionStrategy, SecurityContext, OnDestroy } from '@angular/core';
+import { WebsocketService } from '../../services/websocket.service';
+import { Observable, Subject, map, tap } from 'rxjs';
+import { StateService } from '../../services/state.service';
+import { HealthCheckHost } from '../../interfaces/websocket.interface';
+import { DomSanitizer } from '@angular/platform-browser';
+
+@Component({
+  selector: 'app-server-health',
+  templateUrl: './server-health.component.html',
+  styleUrls: ['./server-health.component.scss'],
+  changeDetection: ChangeDetectionStrategy.OnPush,
+})
+export class ServerHealthComponent implements OnInit, OnDestroy {
+  hosts$: Observable<HealthCheckHost[]>;
+  tip$: Subject<number>;
+  hosts: HealthCheckHost[] = [];
+
+  constructor(
+    private websocketService: WebsocketService,
+    private stateService: StateService,
+    public sanitizer: DomSanitizer,
+  ) {}
+
+  ngOnInit(): void {
+    this.hosts$ = this.stateService.serverHealth$.pipe(
+      map((hosts) => {
+        const subpath = window.location.pathname.slice(0, -6);
+        for (const host of hosts) {
+          let statusUrl = '';
+          let linkHost = '';
+          if (host.socket) {
+            statusUrl = window.location.host + subpath + '/status';
+            linkHost = window.location.host + subpath;
+          } else {
+            statusUrl = host.host.slice(0, -4) + subpath + '/status';
+            linkHost = host.host.slice(0, -4) + subpath;
+          }
+          host.statusPage = this.sanitizer.bypassSecurityTrustResourceUrl(this.sanitizer.sanitize(SecurityContext.URL, statusUrl));
+          host.link = linkHost;
+        }
+        return hosts;
+      }),
+      tap((hosts) => {
+        if (this.hosts.length !== hosts.length) {
+          this.hosts = hosts;
+        }
+      })
+    );
+    this.tip$ = this.stateService.chainTip$;
+    this.websocketService.want(['blocks', 'tomahawk']);
+  }
+
+  scrollTo(host: HealthCheckHost): void {
+    const el = document.getElementById(host.host);
+    if (el) {
+      el.scrollIntoView();
+    }
+  }
+
+  trackByFn(index: number, host: HealthCheckHost): string {
+    return host.host;
+  }
+
+  ngOnDestroy(): void {
+    this.hosts = [];
+  }
+}

frontend/src/app/interfaces/websocket.interface.ts

@@ -1,3 +1,4 @@
+import { SafeResourceUrl } from '@angular/platform-browser';
 import { ILoadingIndicators } from '../services/state.service';
 import { Transaction } from './electrs.interface';
 import { BlockExtended, DifficultyAdjustment, RbfTree } from './node-api.interface';
@@ -120,4 +121,17 @@ export interface Recommendedfees {
   hourFee: number;
   minimumFee: number;
   economyFee: number;
+}
+
+export interface HealthCheckHost {
+  host: string;
+  active: boolean;
+  rtt: number;
+  latestHeight: number;
+  socket: boolean;
+  outOfSync: boolean;
+  unreachable: boolean;
+  checked: boolean;
+  link?: string;
+  statusPage?: SafeResourceUrl;
 }

frontend/src/app/services/state.service.ts

@@ -1,14 +1,13 @@
 import { Inject, Injectable, PLATFORM_ID, LOCALE_ID } from '@angular/core';
 import { ReplaySubject, BehaviorSubject, Subject, fromEvent, Observable, merge } from 'rxjs';
 import { Transaction } from '../interfaces/electrs.interface';
-import { IBackendInfo, MempoolBlock, MempoolBlockDelta, MempoolInfo, Recommendedfees, ReplacedTransaction, ReplacementInfo, TransactionCompressed, TransactionStripped } from '../interfaces/websocket.interface';
+import { HealthCheckHost, IBackendInfo, MempoolBlock, MempoolBlockDelta, MempoolInfo, Recommendedfees, ReplacedTransaction, ReplacementInfo, TransactionStripped } from '../interfaces/websocket.interface';
 import { BlockExtended, CpfpInfo, DifficultyAdjustment, MempoolPosition, OptimizedMempoolStats, RbfTree } from '../interfaces/node-api.interface';
 import { Router, NavigationStart } from '@angular/router';
 import { isPlatformBrowser } from '@angular/common';
 import { filter, map, scan, shareReplay } from 'rxjs/operators';
 import { StorageService } from './storage.service';
 import { hasTouchScreen } from '../shared/pipes/bytes-pipe/utils';
-import { ApiService } from './api.service';
 import { ActiveFilter } from '../shared/filters.utils';
 
 export interface MarkBlockState {
@@ -129,6 +128,7 @@ export class StateService {
   loadingIndicators$ = new ReplaySubject<ILoadingIndicators>(1);
   recommendedFees$ = new ReplaySubject<Recommendedfees>(1);
   chainTip$ = new ReplaySubject<number>(-1);
+  serverHealth$ = new Subject<HealthCheckHost[]>();
 
   live2Chart$ = new Subject<OptimizedMempoolStats>();
 

frontend/src/app/services/websocket.service.ts

@@ -415,6 +415,10 @@ export class WebsocketService {
       this.stateService.previousRetarget$.next(response.previousRetarget);
     }
 
+    if (response['tomahawk']) {
+      this.stateService.serverHealth$.next(response['tomahawk']);
+    }
+
     if (response['git-commit']) {
       this.stateService.backendInfo$.next(response['git-commit']);
     }

frontend/src/app/shared/shared.module.ts

@@ -53,6 +53,7 @@ import { AssetComponent } from '../components/asset/asset.component';
 import { AssetsComponent } from '../components/assets/assets.component';
 import { AssetsNavComponent } from '../components/assets/assets-nav/assets-nav.component';
 import { StatusViewComponent } from '../components/status-view/status-view.component';
+import { ServerHealthComponent } from '../components/server-health/server-health.component';
 import { FeesBoxComponent } from '../components/fees-box/fees-box.component';
 import { DifficultyComponent } from '../components/difficulty/difficulty.component';
 import { DifficultyTooltipComponent } from '../components/difficulty/difficulty-tooltip.component';
@@ -151,6 +152,7 @@ import { OnlyVsizeDirective, OnlyWeightDirective } from './components/weight-dir
     AssetComponent,
     AssetsComponent,
     StatusViewComponent,
+    ServerHealthComponent,
     FeesBoxComponent,
     DifficultyComponent,
     DifficultyMiningComponent,
@@ -277,6 +279,7 @@ import { OnlyVsizeDirective, OnlyWeightDirective } from './components/weight-dir
     AssetComponent,
     AssetsComponent,
     StatusViewComponent,
+    ServerHealthComponent,
     FeesBoxComponent,
     DifficultyComponent,
     DifficultyMiningComponent,