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feat(agent): implement nostr relay load test script
Implements a load testing script for Nostr relays that simulates multiple clients, generates mixed event traffic (View/Video), and measures performance metrics including latency, throughput, and CPU usage. It also includes strict safety guardrails to prevent accidental load testing against public relays. Signed-off-by: Jules <[email protected]> Co-authored-by: PR0M3TH3AN <[email protected]>
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@@ -1,288 +1,382 @@
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import WebSocket, { WebSocketServer } from 'ws';
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import { webcrypto } from 'node:crypto';
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import fs from 'node:fs';
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import path from 'node:path';
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import { generateSecretKey, getPublicKey, finalizeEvent } from 'nostr-tools';
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import { WebSocket } from 'ws';
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import { finalizeEvent, generateSecretKey, getPublicKey } from 'nostr-tools';
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import { startRelay } from './simple-relay.mjs';
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import { buildViewEvent, buildVideoPostEvent } from '../../js/nostrEventSchemas.js';
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import fs from 'fs';
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import path from 'path';
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import { fileURLToPath } from 'url';
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// Polyfills for Node.js environment
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if (typeof globalThis.WebSocket === 'undefined') {
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globalThis.WebSocket = WebSocket;
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// --- Polyfills and Environment Setup ---
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if (typeof global.window === 'undefined') {
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global.window = {};
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}
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if (typeof globalThis.crypto === 'undefined') {
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globalThis.crypto = webcrypto;
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// Ensure TextEncoder is available (should be in Node 18+)
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if (typeof TextEncoder === 'undefined') {
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const { TextEncoder } = await import('util');
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global.TextEncoder = TextEncoder;
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}
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// Configuration
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const ARGS = process.argv.slice(2);
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// Ensure crypto is available for nostr-tools
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if (typeof crypto === 'undefined') {
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const { webcrypto } = await import('node:crypto');
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global.crypto = webcrypto;
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}
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// --- Configuration ---
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const args = process.argv.slice(2);
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const getConfig = (key, defaultVal) => {
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const envKey = key.toUpperCase().replace(/-/g, '_');
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if (process.env[envKey]) return process.env[envKey];
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const flagIndex = ARGS.indexOf(`--${key}`);
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if (flagIndex !== -1 && ARGS[flagIndex + 1]) return ARGS[flagIndex + 1];
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return defaultVal;
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const index = args.indexOf(key);
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return index !== -1 ? args[index + 1] : defaultVal;
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};
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const RELAY_URL = getConfig('relay-url', 'ws://localhost:8080');
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const CLIENT_COUNT = parseInt(getConfig('clients', '1000'), 10);
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const DURATION_SEC = parseInt(getConfig('duration', '600'), 10);
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const EVENT_RATE = parseFloat(getConfig('rate', '1.0')); // events per second per client
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const MODE = getConfig('mode', 'mixed'); // 'view', 'video', 'mixed'
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const MOCK_MODE = ARGS.includes('--mock');
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// Constants
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const KIND_VIDEO_POST = 30078;
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const KIND_WATCH_HISTORY = 30079;
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const START_TIME = Date.now();
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// Guardrails
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const isPublicRelay = (url) => {
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if (MOCK_MODE) return false;
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const u = new URL(url);
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const host = u.hostname;
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return !(
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host === 'localhost' ||
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host === '127.0.0.1' ||
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host === '::1' ||
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host.startsWith('192.168.') ||
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host.startsWith('10.') ||
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host.endsWith('.local')
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);
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const config = {
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clients: parseInt(getConfig('--clients', '1000'), 10),
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duration: parseInt(getConfig('--duration', '600'), 10), // seconds
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rate: parseFloat(getConfig('--rate', '0.1')), // events per second per client
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relay: getConfig('--relay', null),
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outputDir: 'artifacts',
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};
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if (isPublicRelay(RELAY_URL)) {
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console.error(`ERROR: RELAY_URL '${RELAY_URL}' appears to be a public relay.`);
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console.error(' Load tests must be run against local or dedicated test relays.');
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process.exit(1);
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}
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// --- Safety Guardrails ---
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function isSafeRelay(url) {
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try {
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const u = new URL(url);
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const host = u.hostname;
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// Metrics
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const metrics = {
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eventsSent: 0,
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eventsAcked: 0,
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eventsFailed: 0,
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signingTimes: [],
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latencies: [],
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errors: {},
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};
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// Allow local
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if (host === 'localhost' || host === '127.0.0.1' || host === '0.0.0.0' || host === '::1') {
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return true;
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}
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// Mock Relay Server
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let mockServer;
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if (MOCK_MODE) {
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console.log('Starting internal mock relay on port 8080...');
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mockServer = new WebSocketServer({ port: 8080 });
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mockServer.on('connection', (ws) => {
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ws.on('message', (message) => {
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try {
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const data = JSON.parse(message);
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if (Array.isArray(data) && data[0] === 'EVENT') {
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const eventId = data[1].id;
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ws.send(JSON.stringify(['OK', eventId, true, '']));
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// Allow private IP ranges (IPv4)
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// 10.0.0.0 - 10.255.255.255
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if (host.startsWith('10.')) {
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return true;
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}
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// 192.168.0.0 - 192.168.255.255
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if (host.startsWith('192.168.')) {
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return true;
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}
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// 172.16.0.0 - 172.31.255.255
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if (host.startsWith('172.')) {
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const parts = host.split('.');
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if (parts.length === 4) {
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const second = parseInt(parts[1], 10);
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if (second >= 16 && second <= 31) {
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return true;
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}
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} catch (e) {
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// ignore malformed
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}
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});
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});
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}
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return false;
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} catch (e) {
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return false;
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}
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}
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// Helpers
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const sleep = (ms) => new Promise((resolve) => setTimeout(resolve, ms));
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const createClients = (n) => {
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const clients = [];
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for (let i = 0; i < n; i++) {
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const sk = generateSecretKey();
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clients.push({
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sk,
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pk: getPublicKey(sk),
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ws: null,
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connected: false,
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});
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}
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return clients;
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// --- Statistics ---
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const stats = {
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sent: 0,
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accepted: 0,
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rejected: 0,
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errors: 0,
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latencies: [], // Array of ms
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signingTimes: [], // Array of ms
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startTime: Date.now(),
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resourceUsage: [],
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};
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const connectClient = (client) => {
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return new Promise((resolve) => {
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client.ws = new WebSocket(RELAY_URL);
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client.ws.on('open', () => {
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client.connected = true;
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resolve(true);
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});
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client.ws.on('error', (err) => {
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metrics.errors[err.message] = (metrics.errors[err.message] || 0) + 1;
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resolve(false);
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});
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client.ws.on('message', (data) => {
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// --- Load Client Class ---
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class LoadClient {
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constructor(relayUrl, index) {
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this.relayUrl = relayUrl;
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this.index = index;
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this.sk = generateSecretKey();
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this.pk = getPublicKey(this.sk);
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this.ws = null;
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this.connected = false;
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this.msgQueue = new Map(); // id -> {resolve, reject, start}
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}
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connect() {
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return new Promise((resolve, reject) => {
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this.ws = new WebSocket(this.relayUrl);
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this.ws.on('open', () => {
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this.connected = true;
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resolve();
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});
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this.ws.on('message', (data) => {
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try {
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const msg = JSON.parse(data.toString());
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if (msg[0] === 'OK') {
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const eventId = msg[1];
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const accepted = msg[2];
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const info = client.pendingEvents?.get(eventId);
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if (info) {
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const latency = Date.now() - info.sentAt;
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metrics.latencies.push(latency);
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metrics.eventsAcked++;
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client.pendingEvents.delete(eventId);
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}
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const msg = JSON.parse(data);
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if (Array.isArray(msg) && msg[0] === 'OK') {
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const [_, eventId, success, message] = msg;
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if (this.msgQueue.has(eventId)) {
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const { resolve, reject, start } = this.msgQueue.get(eventId);
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const latency = Date.now() - start;
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this.msgQueue.delete(eventId);
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if (success) {
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stats.accepted++;
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stats.latencies.push(latency);
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resolve({ success, message, latency });
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} else {
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stats.rejected++;
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reject(new Error(message));
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}
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}
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} catch (e) {}
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}
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} catch (err) {
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// ignore parsing errors
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}
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});
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this.ws.on('error', (err) => {
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stats.errors++;
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if (!this.connected) reject(err);
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});
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this.ws.on('close', () => {
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this.connected = false;
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// reject all pending
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for (const [id, { reject }] of this.msgQueue.entries()) {
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reject(new Error('Connection closed'));
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}
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this.msgQueue.clear();
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});
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});
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client.pendingEvents = new Map();
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});
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};
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const generateEvent = (client) => {
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const type = MODE === 'mixed' ? (Math.random() > 0.5 ? 'view' : 'video') : MODE;
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const created_at = Math.floor(Date.now() / 1000);
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if (type === 'view') {
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return {
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kind: KIND_WATCH_HISTORY,
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created_at,
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tags: [
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['t', 'view'],
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['d', Math.random().toString(36).substring(7)],
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],
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content: 'Load test view event',
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};
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} else {
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// Video post with multipart simulation (large tags)
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const tags = [
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['d', Math.random().toString(36).substring(7)],
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['t', 'video'],
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['s', `magnet:?xt=urn:btih:${Math.random().toString(16).substring(2)}`],
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];
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// Add dummy imeta tags to simulate load
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for (let i = 0; i < 20; i++) {
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tags.push(['imeta', `url https://example.com/segment_${i}.mp4`, `dim 1920x1080`, `mime video/mp4`]);
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}
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return {
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kind: KIND_VIDEO_POST,
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created_at,
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tags,
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content: JSON.stringify({
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version: 3,
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title: `Load Test Video ${Math.random()}`,
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videoRootId: `root-${Math.random()}`,
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description: 'Simulated multipart video event for load testing.',
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}),
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};
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}
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};
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const runClientLoop = async (client) => {
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const interval = 1000 / EVENT_RATE;
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while (Date.now() - START_TIME < DURATION_SEC * 1000) {
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if (!client.connected) {
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await sleep(1000);
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continue;
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}
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async publish() {
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if (!this.connected) return;
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try {
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const eventTemplate = generateEvent(client);
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// 80% View, 20% Video
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const isView = Math.random() < 0.8;
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let event;
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const signStart = process.hrtime();
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const event = finalizeEvent(eventTemplate, client.sk);
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const signEnd = process.hrtime(signStart);
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const signTimeMs = (signEnd[0] * 1000) + (signEnd[1] / 1e6);
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metrics.signingTimes.push(signTimeMs);
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if (isView) {
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event = buildViewEvent({
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pubkey: this.pk,
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created_at: Math.floor(Date.now() / 1000),
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content: "Load test view event",
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pointerTags: [['a', `30078:${this.pk}:test-video`]]
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});
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} else {
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event = buildVideoPostEvent({
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pubkey: this.pk,
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created_at: Math.floor(Date.now() / 1000),
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content: {
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title: "Load Test Video",
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description: "A multipart video metadata event for load testing.",
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videoRootId: "test-root-" + Math.random(),
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mode: "native",
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duration: 120,
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mime: "video/mp4"
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}
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});
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}
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client.pendingEvents.set(event.id, { sentAt: Date.now() });
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client.ws.send(JSON.stringify(['EVENT', event]));
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metrics.eventsSent++;
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const signStart = performance.now();
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const signedEvent = finalizeEvent(event, this.sk);
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const signEnd = performance.now();
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stats.signingTimes.push(signEnd - signStart);
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} catch (e) {
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metrics.eventsFailed++;
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metrics.errors[e.message] = (metrics.errors[e.message] || 0) + 1;
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const promise = new Promise((resolve, reject) => {
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// Timeout for OK
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const timeout = setTimeout(() => {
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if (this.msgQueue.has(signedEvent.id)) {
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this.msgQueue.delete(signedEvent.id);
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stats.errors++; // Count timeout as error
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reject(new Error('Timeout waiting for OK'));
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}
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}, 10000);
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this.msgQueue.set(signedEvent.id, {
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resolve: (res) => { clearTimeout(timeout); resolve(res); },
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reject: (err) => { clearTimeout(timeout); reject(err); },
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start: Date.now()
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});
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});
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this.ws.send(JSON.stringify(["EVENT", signedEvent]));
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stats.sent++;
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await promise;
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} catch (err) {
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// console.error(`Client ${this.index} error:`, err.message);
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// Already counted in stats if it was a reject from queue
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if (!err.message.includes('Timeout') && !err.message.includes('Connection closed')) {
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// other errors
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}
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}
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// jitter
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const delay = interval + (Math.random() * interval * 0.1);
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await sleep(delay);
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}
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};
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// Main execution
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(async () => {
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console.log(`Starting Load Test`);
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console.log(` Relay: ${RELAY_URL}`);
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console.log(` Clients: ${CLIENT_COUNT}`);
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console.log(` Duration: ${DURATION_SEC}s`);
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console.log(` Rate: ${EVENT_RATE} events/s/client`);
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console.log(` Mode: ${MODE}`);
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if (MOCK_MODE) console.log(' (Mock Mode Enabled)');
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const clients = createClients(CLIENT_COUNT);
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console.log(`Generated ${clients.length} client identities.`);
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console.log('Connecting clients...');
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const connections = await Promise.all(clients.map(connectClient));
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const connectedCount = connections.filter(Boolean).length;
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console.log(`Connected ${connectedCount}/${CLIENT_COUNT} clients.`);
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if (connectedCount === 0) {
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console.error('Failed to connect any clients. Aborting.');
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process.exit(1);
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}
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console.log('Starting load generation...');
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const loops = clients.map(client => runClientLoop(client));
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close() {
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if (this.ws) {
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this.ws.terminate();
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}
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}
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}
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await Promise.all(loops);
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// --- Main Execution ---
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async function main() {
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console.log(`Starting load test with config:`, config);
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console.log('Test finished. Disconnecting...');
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clients.forEach(c => c.ws?.close());
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if (mockServer) mockServer.close();
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let relayServer;
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let relayUrl = config.relay;
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// Reporting
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const avgLatency = metrics.latencies.reduce((a, b) => a + b, 0) / metrics.latencies.length || 0;
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const sortedLatencies = metrics.latencies.sort((a, b) => a - b);
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const p95Latency = sortedLatencies[Math.floor(sortedLatencies.length * 0.95)] || 0;
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const avgSigningTime = metrics.signingTimes.reduce((a, b) => a + b, 0) / metrics.signingTimes.length || 0;
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if (relayUrl) {
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if (!isSafeRelay(relayUrl)) {
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console.error(`\n[FATAL] Guardrail violation: Load tests against public relays are prohibited.\nTarget URL: ${relayUrl}\nAllowed targets: localhost, private IP ranges.\n`);
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process.exit(1);
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}
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console.log(`Using provided relay: ${relayUrl}`);
|
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} else {
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const port = 8899;
|
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relayServer = startRelay(port);
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relayUrl = `ws://localhost:${port}`;
|
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console.log(`Started local relay at ${relayUrl}`);
|
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}
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||||
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||||
const report = {
|
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timestamp: new Date().toISOString(),
|
||||
config: {
|
||||
relayUrl: RELAY_URL,
|
||||
clientCount: CLIENT_COUNT,
|
||||
duration: DURATION_SEC,
|
||||
rate: EVENT_RATE,
|
||||
mode: MODE,
|
||||
},
|
||||
metrics: {
|
||||
totalSent: metrics.eventsSent,
|
||||
totalAcked: metrics.eventsAcked,
|
||||
totalFailed: metrics.eventsFailed,
|
||||
successRate: (metrics.eventsAcked / metrics.eventsSent) * 100 || 0,
|
||||
avgLatencyMs: avgLatency,
|
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p95LatencyMs: p95Latency,
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avgSigningTimeMs: avgSigningTime,
|
||||
throughput: metrics.eventsAcked / DURATION_SEC,
|
||||
},
|
||||
errors: metrics.errors,
|
||||
hotFunctions: [
|
||||
{ name: 'Event Signing', avgTimeMs: avgSigningTime, note: 'Client-side CPU bottleneck' },
|
||||
{ name: 'Network Roundtrip', avgTimeMs: avgLatency, note: 'Network/Relay latency' }
|
||||
],
|
||||
remediation: [
|
||||
'If signing time is high, consider parallelizing clients or using more powerful client machines.',
|
||||
'If latency is high, check relay resource usage (CPU, RAM, Disk I/O) or network bandwidth.',
|
||||
'If failure rate is high, check relay error logs for rate limiting or rejection reasons.'
|
||||
]
|
||||
const clients = [];
|
||||
console.log(`Initializing ${config.clients} clients...`);
|
||||
|
||||
// Create clients
|
||||
for (let i = 0; i < config.clients; i++) {
|
||||
clients.push(new LoadClient(relayUrl, i));
|
||||
}
|
||||
|
||||
// Connect clients (staggered slightly to avoid connection storm issues in node)
|
||||
const chunkSize = 50;
|
||||
for (let i = 0; i < clients.length; i += chunkSize) {
|
||||
await Promise.all(clients.slice(i, i + chunkSize).map(c => c.connect()));
|
||||
if (i + chunkSize < clients.length) await new Promise(r => setTimeout(r, 100));
|
||||
}
|
||||
|
||||
console.log(`All clients connected.`);
|
||||
|
||||
// Scheduler
|
||||
// Total events per second target = clients * rate
|
||||
// We can use a central scheduler to pick a random client and ask it to publish.
|
||||
// This is more efficient than N intervals.
|
||||
|
||||
const eventsPerSecond = config.clients * config.rate;
|
||||
const intervalMs = 1000 / eventsPerSecond;
|
||||
|
||||
console.log(`Targeting ${eventsPerSecond.toFixed(2)} events/sec (interval: ${intervalMs.toFixed(2)}ms)`);
|
||||
|
||||
let active = true;
|
||||
let timer;
|
||||
|
||||
const scheduleNext = () => {
|
||||
if (!active) return;
|
||||
const client = clients[Math.floor(Math.random() * clients.length)];
|
||||
client.publish().catch(() => {}); // fire and forget-ish, errors tracked in client
|
||||
|
||||
// Adjust for drift? Simple setTimeout for now.
|
||||
// For high rates, setTimeout might be too slow/imprecise.
|
||||
// But for 1000 * 0.1 = 100Hz, it's 10ms, which is fine.
|
||||
timer = setTimeout(scheduleNext, intervalMs);
|
||||
};
|
||||
|
||||
const dateStr = new Date().toISOString().split('T')[0].replace(/-/g, '');
|
||||
const reportDir = path.join(process.cwd(), 'artifacts');
|
||||
if (!fs.existsSync(reportDir)) fs.mkdirSync(reportDir);
|
||||
const reportPath = path.join(reportDir, `load-report-${dateStr}.json`);
|
||||
scheduleNext();
|
||||
|
||||
fs.writeFileSync(reportPath, JSON.stringify(report, null, 2));
|
||||
console.log(`Report saved to ${reportPath}`);
|
||||
// Resource monitoring
|
||||
const resourceInterval = setInterval(() => {
|
||||
const cpu = process.cpuUsage();
|
||||
const mem = process.memoryUsage();
|
||||
stats.resourceUsage.push({
|
||||
time: Date.now() - stats.startTime,
|
||||
cpuUser: cpu.user,
|
||||
cpuSystem: cpu.system,
|
||||
rss: mem.rss,
|
||||
heapTotal: mem.heapTotal,
|
||||
heapUsed: mem.heapUsed
|
||||
});
|
||||
}, 5000);
|
||||
|
||||
process.exit(0);
|
||||
})();
|
||||
// Duration
|
||||
await new Promise(resolve => setTimeout(resolve, config.duration * 1000));
|
||||
|
||||
active = false;
|
||||
clearTimeout(timer);
|
||||
clearInterval(resourceInterval);
|
||||
|
||||
console.log('Stopping test...');
|
||||
clients.forEach(c => c.close());
|
||||
if (relayServer) {
|
||||
await relayServer.close();
|
||||
}
|
||||
|
||||
// --- Report Generation ---
|
||||
generateReport();
|
||||
}
|
||||
|
||||
function generateReport() {
|
||||
const durationSec = (Date.now() - stats.startTime) / 1000;
|
||||
const throughput = stats.accepted / durationSec;
|
||||
|
||||
stats.latencies.sort((a, b) => a - b);
|
||||
const p50 = stats.latencies[Math.floor(stats.latencies.length * 0.5)] || 0;
|
||||
const p95 = stats.latencies[Math.floor(stats.latencies.length * 0.95)] || 0;
|
||||
const p99 = stats.latencies[Math.floor(stats.latencies.length * 0.99)] || 0;
|
||||
|
||||
const avgSignTime = stats.signingTimes.reduce((a, b) => a + b, 0) / (stats.signingTimes.length || 1);
|
||||
|
||||
const report = {
|
||||
config,
|
||||
timestamp: new Date().toISOString(),
|
||||
durationSec,
|
||||
throughput,
|
||||
totalSent: stats.sent,
|
||||
totalAccepted: stats.accepted,
|
||||
totalRejected: stats.rejected,
|
||||
totalErrors: stats.errors,
|
||||
latency: {
|
||||
p50,
|
||||
p95,
|
||||
p99,
|
||||
min: stats.latencies[0] || 0,
|
||||
max: stats.latencies[stats.latencies.length - 1] || 0,
|
||||
avg: stats.latencies.reduce((a, b) => a + b, 0) / (stats.latencies.length || 1)
|
||||
},
|
||||
signingTime: {
|
||||
avg: avgSignTime,
|
||||
max: Math.max(...stats.signingTimes, 0)
|
||||
},
|
||||
resources: stats.resourceUsage,
|
||||
topBottlenecks: [],
|
||||
proposedRemediation: []
|
||||
};
|
||||
|
||||
// Analysis
|
||||
if (stats.errors > 0) {
|
||||
report.topBottlenecks.push("High error rate detected");
|
||||
}
|
||||
if (p99 > 1000) {
|
||||
report.topBottlenecks.push("High p99 latency (>1s)");
|
||||
}
|
||||
if (avgSignTime > 10) { // arbitrary threshold for JS signing
|
||||
report.topBottlenecks.push(`Slow client-side signing (avg ${avgSignTime.toFixed(2)}ms)`);
|
||||
report.proposedRemediation.push("Use optimized crypto library or offload signing.");
|
||||
}
|
||||
|
||||
// Output
|
||||
if (!fs.existsSync(config.outputDir)) {
|
||||
fs.mkdirSync(config.outputDir, { recursive: true });
|
||||
}
|
||||
|
||||
const dateStr = new Date().toISOString().slice(0, 10).replace(/-/g, '');
|
||||
const filename = path.join(config.outputDir, `load-report-${dateStr}.json`);
|
||||
|
||||
fs.writeFileSync(filename, JSON.stringify(report, null, 2));
|
||||
console.log(`Report written to ${filename}`);
|
||||
console.log(`Summary:`);
|
||||
console.log(` Throughput: ${throughput.toFixed(2)} events/sec`);
|
||||
console.log(` Latency p50: ${p50}ms`);
|
||||
console.log(` Latency p95: ${p95}ms`);
|
||||
console.log(` Errors: ${stats.errors}`);
|
||||
}
|
||||
|
||||
main().catch(console.error);
|
||||
Reference in new issue
Block a user