Use xo-cash/utils sse. Add vending machine template. Greatly improve startup times.

src/services/rates.ts

@@ -1,3 +1,4 @@
+import { OracleClient } from '@generalprotocols/oracle-client';
 import { EventEmitter } from '../utils/event-emitter.js';
 import {
   type RatesEventMap,
@@ -73,8 +74,17 @@ export class RatesService extends EventEmitter<RatesServiceEventMap> {
     settings: SettingsService,
     adapter?: RatesAdapter,
   ): Promise<RatesService> {
-    const resolvedAdapter = adapter ?? (await RatesOracle.from(undefined, settings));
-    return new RatesService(resolvedAdapter, settings);
+    if (adapter) {
+      return new RatesService(adapter, settings);
+    }
+
+    const oracleClient = new OracleClient();
+    oracleClient.start();
+
+    const ratesOracle = new RatesOracle(oracleClient, settings);
+    ratesOracle.start();
+
+    return new RatesService(ratesOracle, settings);
   }
 
   /**