frontend resync recent blocks when necessary

backend/src/api/websocket-handler.ts

@@ -116,7 +116,7 @@ class WebsocketHandler {
           }
 
           // send initial data when a client first starts a subscription
-          if (wantNow['want-blocks']) {
+          if (wantNow['want-blocks'] || (parsedMessage && parsedMessage['refresh-blocks'])) {
             response['blocks'] = this.socketData['blocks'];
           }
 

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

@@ -31,6 +31,7 @@ export interface WebsocketResponse {
   'track-rbf'?: string;
   'watch-mempool'?: boolean;
   'track-bisq-market'?: string;
+  'refresh-blocks'?: boolean;
 }
 
 export interface ReplacedTransaction extends Transaction {

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

@@ -235,6 +235,8 @@ export class WebsocketService {
   }
 
   handleResponse(response: WebsocketResponse) {
+    let reinitBlocks = false;
+
     if (response.blocks && response.blocks.length) {
       const blocks = response.blocks;
       let maxHeight = 0;
@@ -256,9 +258,11 @@ export class WebsocketService {
     }
 
     if (response.block) {
-      if (response.block.height > this.stateService.latestBlockHeight) {
+      if (response.block.height === this.stateService.latestBlockHeight + 1) {
         this.stateService.updateChainTip(response.block.height);
         this.stateService.blocks$.next([response.block, response.txConfirmed || '']);
+      } else if (response.block.height > this.stateService.latestBlockHeight + 1) {
+        reinitBlocks = true;
       }
 
       if (response.txConfirmed) {
@@ -369,5 +373,9 @@ export class WebsocketService {
     if (response['git-commit']) {
       this.stateService.backendInfo$.next(response['git-commit']);
     }
+
+    if (reinitBlocks) {
+      this.websocketSubject.next({'refresh-blocks': true});
+    }
   }
 }