Add fee rate display component

frontend/src/app/shared/components/fee-rate/fee-rate.component.html

@@ -0,0 +1,4 @@
+<ng-container *ngIf="rateUnits$ | async as units">
+  <ng-container *ngIf="units !== 'wu'">{{ fee / (weight / 4) | feeRounding:rounding }} <span *ngIf="showUnit" [class]="unitClass">sat/vB</span></ng-container>
+  <ng-container *ngIf="units === 'wu'">{{ fee / weight | feeRounding:rounding }} <span *ngIf="showUnit" [class]="unitClass">sat/WU</span></ng-container>
+</ng-container>

frontend/src/app/shared/components/fee-rate/fee-rate.component.ts

@@ -0,0 +1,26 @@
+import { Component, Input, OnInit } from '@angular/core';
+import { Observable } from 'rxjs';
+import { StateService } from '../../../services/state.service';
+
+@Component({
+  selector: 'app-fee-rate',
+  templateUrl: './fee-rate.component.html',
+  styleUrls: ['./fee-rate.component.scss']
+})
+export class FeeRateComponent implements OnInit {
+  @Input() fee: number;
+  @Input() weight: number = 4;
+  @Input() rounding: string = null;
+  @Input() showUnit: boolean = true;
+  @Input() unitClass: string = 'symbol';
+
+  rateUnits$: Observable<string>;
+
+  constructor(
+    private stateService: StateService,
+  ) { }
+
+  ngOnInit() {
+    this.rateUnits$ = this.stateService.rateUnits$;
+  }
+}

frontend/src/app/shared/pipes/fee-rounding/fee-rounding.pipe.ts

@@ -9,7 +9,11 @@ export class FeeRoundingPipe implements PipeTransform {
     @Inject(LOCALE_ID) private locale: string,
   ) {}
 
-  transform(fee: number): string {
+  transform(fee: number, rounding = null): string {
+    if (rounding) {
+      return formatNumber(fee, this.locale, rounding);
+    }
+
     if (fee >= 100) {
       return formatNumber(fee, this.locale, '1.0-0')
     } else if (fee < 10) {

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

@@ -83,6 +83,7 @@ import { IndexingProgressComponent } from '../components/indexing-progress/index
 import { SvgImagesComponent } from '../components/svg-images/svg-images.component';
 import { ChangeComponent } from '../components/change/change.component';
 import { SatsComponent } from './components/sats/sats.component';
+import { FeeRateComponent } from './components/fee-rate/fee-rate.component';
 import { TruncateComponent } from './components/truncate/truncate.component';
 import { SearchResultsComponent } from '../components/search-form/search-results/search-results.component';
 import { TimestampComponent } from './components/timestamp/timestamp.component';
@@ -173,6 +174,7 @@ import { ClockComponent } from '../components/clock/clock.component';
     SvgImagesComponent,
     ChangeComponent,
     SatsComponent,
+    FeeRateComponent,
     TruncateComponent,
     SearchResultsComponent,
     TimestampComponent,
@@ -287,6 +289,7 @@ import { ClockComponent } from '../components/clock/clock.component';
     SvgImagesComponent,
     ChangeComponent,
     SatsComponent,
+    FeeRateComponent,
     TruncateComponent,
     SearchResultsComponent,
     TimestampComponent,

frontend/src/styles.scss

@@ -221,7 +221,7 @@ main {
 }
 
 .block-size, .blocks-container {
-  span {
+  .symbol {
     font-size: 16px;
     color: #fff !important;
   }