diff --git a/js/nostr/client.js b/js/nostr/client.js
index bb7e4ccb..c04865fa 100644
--- a/js/nostr/client.js
+++ b/js/nostr/client.js
@@ -213,7 +213,8 @@ import { queueSignEvent } from "./signRequestQueue.js";
 import { EventsMap } from "./eventsMap.js";
 import { PersistenceManager } from "./managers/PersistenceManager.js";
 import { ConnectionManager } from "./managers/ConnectionManager.js";
-import { SignerManager } from "./managers/SignerManager.js";
+import { SignerManager, resolveSignerCapabilities } from "./managers/SignerManager.js";
+import { RelayBatchFetcher } from "./relayBatchFetcher.js";
 import {
   prepareVideoPublishPayload,
   prepareVideoMirrorOptions,
@@ -463,6 +464,7 @@ export class NostrClient {
     this.dirtyTombstones = new Set();
     this.persistenceManager = new PersistenceManager(this);
     this.syncMetadataStore = new SyncMetadataStore();
+    this.relayBatchFetcher = new RelayBatchFetcher(this);
 
     this.nip71Cache = new Map();
     this.watchHistory = createWatchHistoryManager({
diff --git a/js/nostr/managers/SignerManager.js b/js/nostr/managers/SignerManager.js
index e794c862..267d62eb 100644
--- a/js/nostr/managers/SignerManager.js
+++ b/js/nostr/managers/SignerManager.js
@@ -53,7 +53,7 @@ import { queueSignEvent } from "../signRequestQueue.js";
 import { signEventWithPrivateKey } from "../publishHelpers.js";
 import { ensureNostrTools, getCachedNostrTools } from "../toolkit.js";
 
-function resolveSignerCapabilities(signer) {
+export function resolveSignerCapabilities(signer) {
   const fallback = {
     sign: false,
     nip44: false,