Avoid logging statistics while affected by esplora failover

backend/src/api/bitcoin/bitcoin-api-abstract-factory.ts

@@ -25,6 +25,7 @@ export interface AbstractBitcoinApi {
   $getBatchedOutspends(txId: string[]): Promise<IEsploraApi.Outspend[][]>;
 
   startHealthChecks(): void;
+  isFailedOver(): boolean;
 }
 export interface BitcoinRpcCredentials {
   host: string;

backend/src/api/bitcoin/bitcoin-api.ts

@@ -356,6 +356,9 @@ class BitcoinApi implements AbstractBitcoinApi {
   }
 
   public startHealthChecks(): void {};
+  public isFailedOver(): boolean {
+    return false;
+  }
 }
 
 export default BitcoinApi;

backend/src/api/bitcoin/esplora-api.ts

@@ -17,6 +17,8 @@ interface FailoverHost {
 }
 
 class FailoverRouter {
+  isFailedOver: boolean = false;
+  preferredHost: FailoverHost;
   activeHost: FailoverHost;
   fallbackHost: FailoverHost;
   hosts: FailoverHost[];
@@ -46,6 +48,7 @@ class FailoverRouter {
       socket: !!config.ESPLORA.UNIX_SOCKET_PATH,
       preferred: true,
     };
+    this.preferredHost = this.activeHost;
     this.fallbackHost = this.activeHost;
     this.hosts.unshift(this.activeHost);
     this.multihost = this.hosts.length > 1;
@@ -151,6 +154,7 @@ class FailoverRouter {
     this.sortHosts();
     this.activeHost = this.hosts[0];
     logger.warn(`Switching esplora host to ${this.activeHost.host}`);
+    this.isFailedOver = this.activeHost !== this.preferredHost;
   }
 
   private addFailure(host: FailoverHost): FailoverHost {
@@ -302,6 +306,10 @@ class ElectrsApi implements AbstractBitcoinApi {
   public startHealthChecks(): void {
     this.failoverRouter.startHealthChecks();
   }
+
+  public isFailedOver(): boolean {
+    return this.failoverRouter.isFailedOver;
+  }
 }
 
 export default ElectrsApi;