An event of a kind this app has no renderer for shows as what its author's client said it is (NIP-31 alt), not as raw content dressed as a post.

A chess game (kind 64) reached through a reaction to it painted its PGN as
a reply. Now it reads "♟ Daily chess game #11: …".

Co-Authored-By: Claude Fable 5.1 <[email protected]>
Claude-Session: https://claude.ai/code/session_01VhUKyXKtsJ67QAFfb7QR9D

2 files changed, 58 insertions, 12 deletions

diff --git a/src/features/messages.js b/src/features/messages.js
index fdd5643..80ce959 100644
--- a/src/features/messages.js
+++ b/src/features/messages.js
@@ -15,7 +15,7 @@
 import {
   subscribeOn, publishOn, queryOn, fetchInboxRelays, relayAlive, liveRelayList, resetRelay,
   npubOf, neventOf, parseNostrPubkey, parseNostrRef, generateSecretKey, getPublicKey, finalizeEvent, nip44,
-  PROFILE_RELAYS, openWrapsOffthread, unwrapDMsOffthread,
+  PROFILE_RELAYS, openWrapsOffthread, unwrapDMsOffthread, verifyEventsAsync,
 } from '../nostr.js';
 import {
   channelKey, channelStream, channelEpoch, channelIsPrivate, controlKey, guestbookKey, openWrap, wrapRumor, rumorWithId,
@@ -32,6 +32,7 @@ import { saveInbox } from '../dm-inbox.js';
 import { mergeFeedWindow } from '../feed-window.js';
 import { createThreadStore } from '../thread-cache.js';
 import { createFeedCache, FEED_CACHE_POSTS } from '../feed-cache.js';
+import { PUBLIC_FEED_RELAYS, popularCandidates } from '../popular-feed.js';
 import { makeSearcher, resultRows, fallbackAvatar, warmSearch, punkImageUrl, punkSmallUrl } from '../recipient-search.js';
 import { getNetwork } from '../api.js';
 import { decodeBolt11 } from '../ark/lightning.js';
@@ -3948,7 +3949,7 @@ export function messagesFeature(ctx) {
   const RELAY_PICKS = ['wss://relay.coinos.io', 'wss://relay.damus.io', 'wss://nos.lol', 'wss://relay.primal.net', 'wss://relay.snort.social',
     'wss://nostr.mom', 'wss://nostr.bitcoiner.social', 'wss://eden.nostr.land', 'wss://nostr.land', 'wss://nostr.oxtr.dev',
     'wss://relay.nostrplebs.com', 'wss://offchain.pub', 'wss://nostr21.com', 'wss://relay.nostr.net', 'wss://nostr-pub.wellorder.net'];
-  const FIREHOSE_RELAYS = ['wss://relay.coinos.io', 'wss://relay.damus.io', 'wss://nos.lol', 'wss://relay.primal.net'];
+  const FIREHOSE_RELAYS = PUBLIC_FEED_RELAYS;
   const normRelay = (u) => {
     let x = String(u || '').trim();
     if (!x) return null;
@@ -3966,10 +3967,38 @@ export function messagesFeature(ctx) {
   // latest reactions, reposts and zaps, counted per post by distinct
   // people, then the posts enough people touched. Older pages walk the
   // reactions back in time. The prose and language tests run at the door.
-  const POPULAR_MIN = 2;
   const POPULAR_ASK = 600; // reactions per round
   const curateFeed = (evs) => { const lang = getLang(); return evs.filter((e) => !isMachinePost(e.content) && inLanguage(e.content, lang)); };
   async function popularPass(extra, merge, c, def) {
+    // Only the default public feed shares a snapshot. Custom relays and older
+    // pages keep their own queries. A static/offline install falls back quickly.
+    if (extra.until == null && !feedRelays(def)) {
+      try {
+        const response = await fetch('/api/feed', { signal: AbortSignal.timeout(1500) });
+        if (!response.ok || !response.headers.get('content-type')?.includes('application/json')) throw new Error('No feed cache');
+        const data = await response.json();
+        if (data.version !== 1 || !Number.isFinite(data.generatedAt) || Date.now() - data.generatedAt > 86400_000
+          || !Array.isArray(data.notes) || data.notes.length > 240 || !Array.isArray(data.profiles) || data.profiles.length > 240
+          || !Number.isFinite(data.popUntil)) throw new Error('Invalid feed cache');
+        const events = [...data.notes, ...data.profiles];
+        // HTTP is another untrusted source: retain the relay signature checks.
+        const valid = await verifyEventsAsync(events);
+        if (c.stopped) return false;
+        const posts = data.notes.filter((e, i) => valid[i] && e.kind === 1);
+        const usable = curateFeed(posts).filter((e) => !isReply(e) && !hidden(e));
+        if (usable.length) {
+          warmProfiles();
+          for (let i = 0; i < data.profiles.length; i++) {
+            const e = data.profiles[i];
+            if (valid[data.notes.length + i] && e.kind === 0) applyProfile(e.pubkey, e);
+          }
+          c.popUntil = c.popUntil || data.popUntil;
+          const got = await mergeFeed(posts, { ...merge, immediate: true }, c);
+          if (got) scheduleRepaint();
+          return got; // already-known posts also count as a successful cache hit
+        }
+      } catch {} // relay path also covers snapshots with no posts in this language
+    }
     const relays = feedRelaysOr(def, FIREHOSE_RELAYS);
     const wide = [...new Set([...relays, ...NOTE_RELAYS])];
     let until = extra.until != null && c.popUntil ? c.popUntil - 1 : undefined;
@@ -3977,19 +4006,15 @@ export function messagesFeature(ctx) {
     for (let round = 0; round < 3 && !c.stopped; round++) {
       const re = await queryOn(wide, { kinds: [6, 7, 9735], limit: POPULAR_ASK, ...(until ? { until } : {}) }, 4500).catch(() => []);
       if (!re.length) break;
-      const counts = new Map();
-      for (const r of re) {
-        const who = r.kind === 9735 ? ((r.tags.find((x) => x[0] === 'P') || [])[1] || r.pubkey) : r.pubkey;
-        for (const x of r.tags) if (x[0] === 'e' && /^[0-9a-f]{64}$/.test(x[1] || '')) (counts.get(x[1]) || counts.set(x[1], new Set()).get(x[1])).add(who);
-      }
+      const candidates = popularCandidates(re);
       const oldest = Math.min(...re.map((r) => r.created_at));
       c.popUntil = c.popUntil && until ? Math.min(c.popUntil, oldest) : (c.popUntil || oldest);
       until = oldest - 1;
-      const ids = [...counts.entries()].filter(([, s]) => s.size >= POPULAR_MIN).sort((a, b) => b[1].size - a[1].size).slice(0, 80).map(([id]) => id);
+      const ids = candidates.ids;
       if (!ids.length) continue;
       const asks = [];
       for (let i = 0; i < ids.length; i += 40) asks.push(queryOn(wide, { ids: ids.slice(i, i + 40) }, 4500).catch(() => []));
-      const posts = (await Promise.all(asks)).flat().filter((e) => e && e.kind === 1 && (counts.get(e.id) || new Set()).size - (counts.get(e.id)?.has(e.pubkey) ? 1 : 0) >= POPULAR_MIN);
+      const posts = (await Promise.all(asks)).flat().filter(candidates.qualifies);
       if (c.stopped) return got;
       if (await mergeFeed(posts, merge, c)) { got = true; scheduleRepaint(); }
       if (got && round >= 0 && (c.notes.length >= FEED_PAGE || extra.until != null)) break;
@@ -4707,6 +4732,19 @@ export function messagesFeature(ctx) {
     }
     if (c.booting) await c.boot;
     if (c.stopped) return false;
+    if (opts.immediate && !c.notes.length && !opts.catchup) {
+      // The public snapshot already contains verified posts and profiles.
+      // Paint text now using the same progressive rows as the local cache;
+      // slow media/quotes must not hold the whole first page behind a spinner.
+      c.booting = true;
+      admitFeed(add, c);
+      c.boot = notesReady(c.notes.slice(0, FEED_PAGE)).finally(() => {
+        c.booting = false;
+        if (!c.stopped && c === feed) scheduleRepaint();
+      });
+      scheduleRepaint();
+      return true;
+    }
     await notesReady(add);
     if (c.stopped) return false;
     for (const e of add) staged.delete(e.id);
@@ -6357,7 +6395,12 @@ export function messagesFeature(ctx) {
     // punks. The name and face come from the batch; the page loads when the
     // profile is actually opened.
     profileOf(pk);
-    const isReply = ev.tags.some((x) => x[0] === 'e');
+    // An event of a kind this app has no renderer for (a chess game, kind
+    // 64, reached through a reaction to it) is shown as what its author's
+    // client said it is (NIP-31 alt), never as raw content dressed as a post.
+    const foreign = ev.kind !== 1 && ev.kind !== 30023;
+    const altText = foreign ? ((ev.tags.find((x) => x[0] === 'alt') || [])[1] || t('noteForeignKind', { kind: ev.kind })) : null;
+    const isReply = !foreign && ev.tags.some((x) => x[0] === 'e');
     const canZap = canZapPk(pk);
     // an optimistic post mid-publish: visible but not yet a real event —
     // dimmed, and no thread/reply/zap until its signed self takes over
@@ -6402,7 +6445,9 @@ export function messagesFeature(ctx) {
             style: 'flex-shrink:0',
             onClick: (e) => { e.stopPropagation(); ui.noteSheet = ev; render(); },
           }, '\u22ef')),
-        h('div', { class: 'note-text', style: 'white-space:pre-wrap;overflow-wrap:anywhere' }, ...noteBody(ev.content, 0, emojiTagMap(ev.tags))),
+        foreign
+          ? h('div', { class: 'note-text small muted', style: 'white-space:pre-wrap;overflow-wrap:anywhere' }, (ev.kind === 64 ? '\u265f ' : '') + altText)
+          : h('div', { class: 'note-text', style: 'white-space:pre-wrap;overflow-wrap:anywhere' }, ...noteBody(ev.content, 0, emojiTagMap(ev.tags))),
         pending ? null : noteActions(pk, ev, { canZap }),
         !pending && whoOpen(ev.id) ? whoPanel(ev) : null));
   }
diff --git a/src/i18n.js b/src/i18n.js
index 7b92e7d..0f11853 100644
--- a/src/i18n.js
+++ b/src/i18n.js
@@ -457,6 +457,7 @@ const STR = {
     arkFeeChain: 'On-chain fee',
     arkFeeService: 'Service fee',
     arkCoinsExpired: 'expired',
+    noteForeignKind: 'A kind {kind} event this app doesn’t show.',
     arkExpiredDust: '{amount} has expired and is too small to renew. You can forget it from the Manage page.',
     arkCoinForget: 'Forget',
     arkCoinForgetTitle: 'Give this coin up: it has expired and is too small to renew or exit.',