Fix relay dedup: normalize URLs to prevent trailing-slash duplicates

src/components/shared/RelaysView.tsx

@@ -1,5 +1,5 @@
 import { useEffect, useState } from "react";
-import { getNDK, getStoredRelayUrls, addRelay, removeRelay, publishRelayList, fetchRelayRecommendations } from "../../lib/nostr";
+import { getNDK, getStoredRelayUrls, addRelay, removeRelay, publishRelayList, fetchRelayRecommendations, normalizeRelayUrl } from "../../lib/nostr";
 import { useRelayHealthStore } from "../../stores/relayHealth";
 import { useUserStore } from "../../stores/user";
 import type { RelayHealthResult } from "../../lib/nostr/relayHealth";
@@ -154,7 +154,7 @@ export function RelaysView() {
   const { loggedIn } = useUserStore();
   const ndk = getNDK();
   const poolRelays = Array.from(ndk.pool?.relays?.values() ?? []);
-  const poolConnectedUrls = new Set(poolRelays.filter((r) => r.connected).map((r) => r.url));
+  const poolConnectedUrls = new Set(poolRelays.filter((r) => r.connected).map((r) => normalizeRelayUrl(r.url)));
 
   const [input, setInput] = useState("");
   const [addError, setAddError] = useState<string | null>(null);
@@ -180,7 +180,7 @@ export function RelaysView() {
       setAddError("URL must start with ws:// or wss://");
       return;
     }
-    if (getStoredRelayUrls().includes(url)) {
+    if (getStoredRelayUrls().includes(normalizeRelayUrl(url))) {
       setAddError("Already in list");
       return;
     }
@@ -218,8 +218,8 @@ export function RelaysView() {
   };
 
   // Merge: show health results first, then any pool relays not yet checked
-  const checkedUrls = new Set(results.map((r) => r.url));
-  const uncheckedPoolRelays = poolRelays.filter((r) => !checkedUrls.has(r.url));
+  const checkedUrls = new Set(results.map((r) => normalizeRelayUrl(r.url)));
+  const uncheckedPoolRelays = poolRelays.filter((r) => !checkedUrls.has(normalizeRelayUrl(r.url)));
 
   // Sort: online first, then slow, then offline
   const sortedResults = [...results].sort((a, b) => {

src/lib/nostr/core.ts

@@ -51,16 +51,30 @@ export const OUTBOX_RELAYS = [
   "wss://relay.nostr.band/",
 ];
 
+/** Normalize relay URL: lowercase host, strip trailing slash, deduplicate. */
+export function normalizeRelayUrl(url: string): string {
+  return url.replace(/\/+$/, "");
+}
+
 export function getStoredRelayUrls(): string[] {
   try {
     const stored = localStorage.getItem(RELAY_STORAGE_KEY);
-    if (stored) return JSON.parse(stored);
+    if (stored) {
+      // Deduplicate on load (handles legacy duplicates from trailing-slash mismatch)
+      const urls: string[] = JSON.parse(stored);
+      const seen = new Set<string>();
+      return urls.map(normalizeRelayUrl).filter((u) => {
+        if (seen.has(u)) return false;
+        seen.add(u);
+        return true;
+      });
+    }
   } catch { /* ignore */ }
   return FALLBACK_RELAYS;
 }
 
 export function saveRelayUrls(urls: string[]) {
-  localStorage.setItem(RELAY_STORAGE_KEY, JSON.stringify(urls));
+  localStorage.setItem(RELAY_STORAGE_KEY, JSON.stringify(urls.map(normalizeRelayUrl)));
 }
 
 let ndk: NDK | null = null;
@@ -119,13 +133,15 @@ export async function resetNDK(): Promise<void> {
 }
 
 export function addRelay(url: string): void {
+  const normalized = normalizeRelayUrl(url);
   const instance = getNDK();
   const urls = getStoredRelayUrls();
-  if (!urls.includes(url)) {
-    saveRelayUrls([...urls, url]);
+  if (!urls.includes(normalized)) {
+    saveRelayUrls([...urls, normalized]);
   }
-  if (!instance.pool?.relays.has(url)) {
-    const relay = new NDKRelay(url, undefined, instance);
+  // Check both with and without trailing slash since NDK may use either
+  if (!instance.pool?.relays.has(normalized) && !instance.pool?.relays.has(normalized + "/")) {
+    const relay = new NDKRelay(normalized, undefined, instance);
     instance.pool?.addRelay(relay, true);
   }
 }

src/lib/nostr/index.ts

@@ -1,4 +1,4 @@
-export { getNDK, getNDKUptimeMs, connectToRelays, ensureConnected, resetNDK, getStoredRelayUrls, addRelay, removeRelay, fetchWithTimeout, withTimeout, FEED_TIMEOUT, THREAD_TIMEOUT, SINGLE_TIMEOUT } from "./core";
+export { getNDK, getNDKUptimeMs, connectToRelays, ensureConnected, resetNDK, getStoredRelayUrls, normalizeRelayUrl, addRelay, removeRelay, fetchWithTimeout, withTimeout, FEED_TIMEOUT, THREAD_TIMEOUT, SINGLE_TIMEOUT } from "./core";
 export { fetchGlobalFeed, fetchFollowFeed, fetchUserNotes, fetchUserNotesNIP65, fetchNoteById, fetchReplies, publishNote, publishReply, publishRepost, publishQuote, fetchHashtagFeed, fetchThreadEvents, fetchAncestors } from "./notes";
 export { publishProfile, publishContactList, fetchProfile, fetchFollowSuggestions, fetchMentions, fetchFollowers, fetchNewFollowers } from "./social";
 export { publishArticle, fetchArticle, fetchAuthorArticles, fetchArticleFeed, searchArticles, fetchByAddr } from "./articles";