Add backend type flag, disable address graphs for non-esplora

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

@@ -92,6 +92,7 @@ const defaultEnv: Env = {
 export class StateService {
   isBrowser: boolean = isPlatformBrowser(this.platformId);
   isMempoolSpaceBuild = window['isMempoolSpaceBuild'] ?? false;
+  backend: 'esplora' | 'electrum' | 'none' = 'esplora';
   network = '';
   lightning = false;
   blockVSize: number;
@@ -99,6 +100,7 @@ export class StateService {
   latestBlockHeight = -1;
   blocks: BlockExtended[] = [];
 
+  backend$ = new BehaviorSubject<'esplora' | 'electrum' | 'none'>('esplora');
   networkChanged$ = new ReplaySubject<string>(1);
   lightningChanged$ = new ReplaySubject<boolean>(1);
   blocksSubject$ = new BehaviorSubject<BlockExtended[]>([]);
@@ -257,6 +259,10 @@ export class StateService {
 
     const rateUnitPreference = this.storageService.getValue('rate-unit-preference');
     this.rateUnits$ = new BehaviorSubject<string>(rateUnitPreference || 'vb');
+
+    this.backend$.subscribe(backend => {
+      this.backend = backend;
+    });
   }
 
   setNetworkBasedonUrl(url: string) {

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

@@ -62,6 +62,7 @@ export class WebsocketService {
         if (theInitData.body.blocks) {
           theInitData.body.blocks = theInitData.body.blocks.reverse();
         }
+        this.stateService.backend$.next(theInitData.backend);
         this.stateService.isLoadingWebSocket$.next(false);
         this.handleResponse(theInitData.body);
         this.startSubscription(false, true);
@@ -290,6 +291,10 @@ export class WebsocketService {
   handleResponse(response: WebsocketResponse) {
     let reinitBlocks = false;
 
+    if (response.backend) {
+      this.stateService.backend$.next(response.backend);
+    }
+
     if (response.blocks && response.blocks.length) {
       const blocks = response.blocks;
       this.stateService.resetBlocks(blocks);