New base code for mempool blockchain explorerer

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

@@ -0,0 +1,20 @@
+import { Injectable } from '@angular/core';
+import { ReplaySubject, BehaviorSubject, Subject } from 'rxjs';
+import { Block } from '../interfaces/electrs.interface';
+import { MempoolBlock } from '../interfaces/websocket.interface';
+import { MempoolStats } from '../interfaces/node-api.interface';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class StateService {
+  latestBlockHeight = 0;
+  blocks$ = new ReplaySubject<Block>(8);
+  conversions$ = new ReplaySubject<any>(1);
+  mempoolBlocks$ = new ReplaySubject<MempoolBlock[]>(1);
+  txConfirmed = new Subject<Block>();
+  live2Chart$ = new Subject<MempoolStats>();
+
+  viewFiat$ = new BehaviorSubject<boolean>(false);
+  isOffline$ = new BehaviorSubject<boolean>(false);
+}