#asknostr I wanted to build a thing to check an npubs first note, kinda like to see how long I've been using nostr, but it doesn't work for everyone I try. What's the right way to do this? Running it here: https://notecheck.bspr.UK Code made by a robot: ❯ cat server.js 10:16:39const express = require("express"); const { nip19 } = require("nostr-tools"); const { SimplePool, useWebSocketImplementation } = require("nostr-tools/pool"); const WebSocket = require("ws"); useWebSocketImplementation(WebSocket); const app = express(); const PORT = 4747; app.use(express.urlencoded({ extended: true })); // Convert npub to hex function npubToHex(npub) { const { type, data } = nip19.decode(npub); if (type !== "npub") throw new Error("Invalid npub"); return data; } // Expanded default relay list const defaultRelays = [ "wss://relay.damus.io", "wss://nos.lol", "wss://nostr.wine", "wss://relay.nostr.band", "wss://nostr.bitcoiner.social", "wss://nostr.oxtr.dev", "wss://soloco.nl", "wss://nostr.einundzwanzig.space", "wss://relay.nostr.net", "wss://offchain.pub", "wss://relay.snort.social", "wss://eden.nostr.land", "wss://nostr.mom", "wss://relay.nostrview.com", "wss://nostr.plebchain.org", "wss://nostr.21sats.net" ]; // Get oldest kind 1 (note) timestamp from multiple relays async function getFirstNoteTimestamp(pubkeyHex, extraRelays = []) { const relays = [...defaultRelays, ...extraRelays]; const pool = new SimplePool(); let oldestTimestamp = Infinity; const promises = relays.map(url => { return new Promise((resolve) => { const sub = pool.subscribe( [url], { kinds: [1], authors: [pubkeyHex] }, { onevent(event) { if (event.created_at < oldestTimestamp) { oldestTimestamp = event.created_at; } }, oneose() { resolve(); } } ); // Safety timeout per relay setTimeout(() => { sub?.close(); resolve(); }, 12000); }); }); await Promise.all(promises); pool.close(relays); return oldestTimestamp === Infinity ? null : oldestTimestamp; } // Home page app.get("/", (req, res) => { res.send(renderPage()); }); // Handle form submission app.post("/", async (req, res) => { const npub = req.body.npub; const extraRelays = req.body.extraRelays ? req.body.extraRelays.split(/\s+/).filter(Boolean) : []; let message; try { const pubkeyHex = npubToHex(npub); const ts = await getFirstNoteTimestamp(pubkeyHex, extraRelays); if (ts) { const timestampStr = new Date(ts * 1000).toUTCString(); message = `First Note: ${timestampStr}`; } else { message = "No notes found for this npub."; } } catch (err) { message = `Error: ${err.message}`; } res.send(renderPage(npub, message, extraRelays)); }); // Render HTML page function renderPage(npub = "", message = "", extraRelays = []) { return ` Nostr First Note Finder

Nostr First Note Finder

${message ? `

${message}

` : ""} `; } app.listen(PORT, () => { console.log(`Server running at http://localhost:${PORT}`); });