552 lines
15 KiB
JavaScript
552 lines
15 KiB
JavaScript
"use strict";
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var __defProp = Object.defineProperty;
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var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
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var __getOwnPropNames = Object.getOwnPropertyNames;
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var __hasOwnProp = Object.prototype.hasOwnProperty;
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var __export = (target, all) => {
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for (var name in all)
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__defProp(target, name, { get: all[name], enumerable: true });
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};
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var __copyProps = (to, from, except, desc) => {
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if (from && typeof from === "object" || typeof from === "function") {
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for (let key of __getOwnPropNames(from))
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if (!__hasOwnProp.call(to, key) && key !== except)
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__defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
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}
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return to;
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};
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var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);
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// abstract-relay.ts
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var abstract_relay_exports = {};
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__export(abstract_relay_exports, {
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AbstractRelay: () => AbstractRelay,
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SendingOnClosedConnection: () => SendingOnClosedConnection,
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Subscription: () => Subscription
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});
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module.exports = __toCommonJS(abstract_relay_exports);
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// utils.ts
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var import_utils = require("@noble/hashes/utils");
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var utf8Decoder = new TextDecoder("utf-8");
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var utf8Encoder = new TextEncoder();
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function normalizeURL(url) {
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try {
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if (url.indexOf("://") === -1)
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url = "wss://" + url;
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let p = new URL(url);
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p.pathname = p.pathname.replace(/\/+/g, "/");
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if (p.pathname.endsWith("/"))
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p.pathname = p.pathname.slice(0, -1);
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if (p.port === "80" && p.protocol === "ws:" || p.port === "443" && p.protocol === "wss:")
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p.port = "";
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p.searchParams.sort();
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p.hash = "";
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return p.toString();
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} catch (e) {
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throw new Error(`Invalid URL: ${url}`);
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}
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}
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var QueueNode = class {
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value;
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next = null;
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prev = null;
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constructor(message) {
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this.value = message;
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}
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};
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var Queue = class {
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first;
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last;
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constructor() {
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this.first = null;
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this.last = null;
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}
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enqueue(value) {
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const newNode = new QueueNode(value);
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if (!this.last) {
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this.first = newNode;
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this.last = newNode;
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} else if (this.last === this.first) {
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this.last = newNode;
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this.last.prev = this.first;
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this.first.next = newNode;
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} else {
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newNode.prev = this.last;
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this.last.next = newNode;
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this.last = newNode;
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}
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return true;
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}
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dequeue() {
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if (!this.first)
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return null;
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if (this.first === this.last) {
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const target2 = this.first;
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this.first = null;
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this.last = null;
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return target2.value;
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}
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const target = this.first;
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this.first = target.next;
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if (this.first) {
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this.first.prev = null;
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}
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return target.value;
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}
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};
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// kinds.ts
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var ClientAuth = 22242;
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// filter.ts
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function matchFilter(filter, event) {
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if (filter.ids && filter.ids.indexOf(event.id) === -1) {
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return false;
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}
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if (filter.kinds && filter.kinds.indexOf(event.kind) === -1) {
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return false;
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}
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if (filter.authors && filter.authors.indexOf(event.pubkey) === -1) {
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return false;
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}
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for (let f in filter) {
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if (f[0] === "#") {
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let tagName = f.slice(1);
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let values = filter[`#${tagName}`];
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if (values && !event.tags.find(([t, v]) => t === f.slice(1) && values.indexOf(v) !== -1))
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return false;
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}
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}
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if (filter.since && event.created_at < filter.since)
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return false;
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if (filter.until && event.created_at > filter.until)
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return false;
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return true;
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}
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function matchFilters(filters, event) {
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for (let i = 0; i < filters.length; i++) {
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if (matchFilter(filters[i], event)) {
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return true;
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}
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}
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return false;
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}
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// fakejson.ts
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function getHex64(json, field) {
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let len = field.length + 3;
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let idx = json.indexOf(`"${field}":`) + len;
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let s = json.slice(idx).indexOf(`"`) + idx + 1;
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return json.slice(s, s + 64);
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}
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function getSubscriptionId(json) {
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let idx = json.slice(0, 22).indexOf(`"EVENT"`);
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if (idx === -1)
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return null;
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let pstart = json.slice(idx + 7 + 1).indexOf(`"`);
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if (pstart === -1)
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return null;
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let start = idx + 7 + 1 + pstart;
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let pend = json.slice(start + 1, 80).indexOf(`"`);
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if (pend === -1)
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return null;
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let end = start + 1 + pend;
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return json.slice(start + 1, end);
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}
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// nip42.ts
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function makeAuthEvent(relayURL, challenge) {
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return {
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kind: ClientAuth,
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created_at: Math.floor(Date.now() / 1e3),
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tags: [
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["relay", relayURL],
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["challenge", challenge]
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],
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content: ""
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};
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}
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// helpers.ts
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async function yieldThread() {
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return new Promise((resolve) => {
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const ch = new MessageChannel();
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const handler = () => {
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ch.port1.removeEventListener("message", handler);
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resolve();
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};
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ch.port1.addEventListener("message", handler);
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ch.port2.postMessage(0);
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ch.port1.start();
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});
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}
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// abstract-relay.ts
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var SendingOnClosedConnection = class extends Error {
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constructor(message, relay) {
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super(`Tried to send message '${message} on a closed connection to ${relay}.`);
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this.name = "SendingOnClosedConnection";
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}
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};
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var AbstractRelay = class {
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url;
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_connected = false;
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onclose = null;
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onnotice = (msg) => console.debug(`NOTICE from ${this.url}: ${msg}`);
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baseEoseTimeout = 4400;
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connectionTimeout = 4400;
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publishTimeout = 4400;
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pingFrequency = 2e4;
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pingTimeout = 2e4;
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openSubs = /* @__PURE__ */ new Map();
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enablePing;
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connectionTimeoutHandle;
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connectionPromise;
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openCountRequests = /* @__PURE__ */ new Map();
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openEventPublishes = /* @__PURE__ */ new Map();
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ws;
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incomingMessageQueue = new Queue();
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queueRunning = false;
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challenge;
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authPromise;
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serial = 0;
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verifyEvent;
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_WebSocket;
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constructor(url, opts) {
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this.url = normalizeURL(url);
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this.verifyEvent = opts.verifyEvent;
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this._WebSocket = opts.websocketImplementation || WebSocket;
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this.enablePing = opts.enablePing;
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}
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static async connect(url, opts) {
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const relay = new AbstractRelay(url, opts);
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await relay.connect();
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return relay;
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}
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closeAllSubscriptions(reason) {
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for (let [_, sub] of this.openSubs) {
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sub.close(reason);
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}
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this.openSubs.clear();
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for (let [_, ep] of this.openEventPublishes) {
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ep.reject(new Error(reason));
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}
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this.openEventPublishes.clear();
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for (let [_, cr] of this.openCountRequests) {
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cr.reject(new Error(reason));
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}
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this.openCountRequests.clear();
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}
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get connected() {
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return this._connected;
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}
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async connect() {
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if (this.connectionPromise)
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return this.connectionPromise;
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this.challenge = void 0;
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this.authPromise = void 0;
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this.connectionPromise = new Promise((resolve, reject) => {
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this.connectionTimeoutHandle = setTimeout(() => {
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reject("connection timed out");
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this.connectionPromise = void 0;
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this.onclose?.();
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this.closeAllSubscriptions("relay connection timed out");
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}, this.connectionTimeout);
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try {
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this.ws = new this._WebSocket(this.url);
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} catch (err) {
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clearTimeout(this.connectionTimeoutHandle);
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reject(err);
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return;
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}
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this.ws.onopen = () => {
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clearTimeout(this.connectionTimeoutHandle);
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this._connected = true;
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if (this.enablePing) {
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this.pingpong();
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}
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resolve();
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};
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this.ws.onerror = (ev) => {
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clearTimeout(this.connectionTimeoutHandle);
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reject(ev.message || "websocket error");
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this._connected = false;
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this.connectionPromise = void 0;
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this.onclose?.();
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this.closeAllSubscriptions("relay connection errored");
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};
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this.ws.onclose = (ev) => {
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clearTimeout(this.connectionTimeoutHandle);
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reject(ev.message || "websocket closed");
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this._connected = false;
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this.connectionPromise = void 0;
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this.onclose?.();
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this.closeAllSubscriptions("relay connection closed");
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};
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this.ws.onmessage = this._onmessage.bind(this);
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});
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return this.connectionPromise;
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}
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async waitForPingPong() {
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return new Promise((res, err) => {
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;
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this.ws && this.ws.on && this.ws.on("pong", () => res(true)) || err("ws can't listen for pong");
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this.ws && this.ws.ping && this.ws.ping();
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});
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}
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async waitForDummyReq() {
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return new Promise((resolve, _) => {
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const sub = this.subscribe([{ ids: ["a".repeat(64)] }], {
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oneose: () => {
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sub.close();
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resolve(true);
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},
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eoseTimeout: this.pingTimeout + 1e3
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});
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});
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}
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async pingpong() {
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if (this.ws?.readyState === 1) {
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const result = await Promise.any([
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this.ws && this.ws.ping && this.ws.on ? this.waitForPingPong() : this.waitForDummyReq(),
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new Promise((res) => setTimeout(() => res(false), this.pingTimeout))
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]);
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if (result) {
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setTimeout(() => this.pingpong(), this.pingFrequency);
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} else {
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this.closeAllSubscriptions("pingpong timed out");
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this._connected = false;
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this.onclose?.();
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this.ws?.close();
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}
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}
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}
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async runQueue() {
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this.queueRunning = true;
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while (true) {
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if (false === this.handleNext()) {
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break;
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}
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await yieldThread();
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}
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this.queueRunning = false;
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}
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handleNext() {
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const json = this.incomingMessageQueue.dequeue();
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if (!json) {
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return false;
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}
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const subid = getSubscriptionId(json);
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if (subid) {
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const so = this.openSubs.get(subid);
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if (!so) {
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return;
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}
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const id = getHex64(json, "id");
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const alreadyHave = so.alreadyHaveEvent?.(id);
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so.receivedEvent?.(this, id);
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if (alreadyHave) {
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return;
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}
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}
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try {
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let data = JSON.parse(json);
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switch (data[0]) {
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case "EVENT": {
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const so = this.openSubs.get(data[1]);
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const event = data[2];
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if (this.verifyEvent(event) && matchFilters(so.filters, event)) {
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so.onevent(event);
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}
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return;
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}
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case "COUNT": {
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const id = data[1];
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const payload = data[2];
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const cr = this.openCountRequests.get(id);
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if (cr) {
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cr.resolve(payload.count);
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this.openCountRequests.delete(id);
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}
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return;
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}
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case "EOSE": {
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const so = this.openSubs.get(data[1]);
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if (!so)
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return;
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so.receivedEose();
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return;
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}
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case "OK": {
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const id = data[1];
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const ok = data[2];
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const reason = data[3];
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const ep = this.openEventPublishes.get(id);
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if (ep) {
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clearTimeout(ep.timeout);
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if (ok)
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ep.resolve(reason);
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else
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ep.reject(new Error(reason));
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this.openEventPublishes.delete(id);
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}
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return;
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}
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case "CLOSED": {
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const id = data[1];
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const so = this.openSubs.get(id);
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if (!so)
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return;
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so.closed = true;
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so.close(data[2]);
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return;
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}
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case "NOTICE":
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this.onnotice(data[1]);
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return;
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case "AUTH": {
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this.challenge = data[1];
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return;
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}
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}
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} catch (err) {
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return;
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}
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}
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async send(message) {
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if (!this.connectionPromise)
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throw new SendingOnClosedConnection(message, this.url);
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this.connectionPromise.then(() => {
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this.ws?.send(message);
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});
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}
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async auth(signAuthEvent) {
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const challenge = this.challenge;
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if (!challenge)
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throw new Error("can't perform auth, no challenge was received");
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if (this.authPromise)
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return this.authPromise;
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this.authPromise = new Promise(async (resolve, reject) => {
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try {
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let evt = await signAuthEvent(makeAuthEvent(this.url, challenge));
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let timeout = setTimeout(() => {
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let ep = this.openEventPublishes.get(evt.id);
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if (ep) {
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ep.reject(new Error("auth timed out"));
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this.openEventPublishes.delete(evt.id);
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}
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}, this.publishTimeout);
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this.openEventPublishes.set(evt.id, { resolve, reject, timeout });
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this.send('["AUTH",' + JSON.stringify(evt) + "]");
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} catch (err) {
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console.warn("subscribe auth function failed:", err);
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}
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});
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return this.authPromise;
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}
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async publish(event) {
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const ret = new Promise((resolve, reject) => {
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const timeout = setTimeout(() => {
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const ep = this.openEventPublishes.get(event.id);
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if (ep) {
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ep.reject(new Error("publish timed out"));
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this.openEventPublishes.delete(event.id);
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}
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}, this.publishTimeout);
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this.openEventPublishes.set(event.id, { resolve, reject, timeout });
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});
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this.send('["EVENT",' + JSON.stringify(event) + "]");
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return ret;
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}
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async count(filters, params) {
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this.serial++;
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const id = params?.id || "count:" + this.serial;
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const ret = new Promise((resolve, reject) => {
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this.openCountRequests.set(id, { resolve, reject });
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});
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this.send('["COUNT","' + id + '",' + JSON.stringify(filters).substring(1));
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return ret;
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}
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subscribe(filters, params) {
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const subscription = this.prepareSubscription(filters, params);
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subscription.fire();
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return subscription;
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}
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prepareSubscription(filters, params) {
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this.serial++;
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const id = params.id || (params.label ? params.label + ":" : "sub:") + this.serial;
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const subscription = new Subscription(this, id, filters, params);
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this.openSubs.set(id, subscription);
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return subscription;
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}
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close() {
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this.closeAllSubscriptions("relay connection closed by us");
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this._connected = false;
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this.onclose?.();
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this.ws?.close();
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}
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_onmessage(ev) {
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this.incomingMessageQueue.enqueue(ev.data);
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if (!this.queueRunning) {
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this.runQueue();
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}
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}
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};
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var Subscription = class {
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relay;
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id;
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closed = false;
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eosed = false;
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filters;
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alreadyHaveEvent;
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receivedEvent;
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onevent;
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oneose;
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onclose;
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eoseTimeout;
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eoseTimeoutHandle;
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constructor(relay, id, filters, params) {
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this.relay = relay;
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this.filters = filters;
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this.id = id;
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this.alreadyHaveEvent = params.alreadyHaveEvent;
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this.receivedEvent = params.receivedEvent;
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this.eoseTimeout = params.eoseTimeout || relay.baseEoseTimeout;
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this.oneose = params.oneose;
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this.onclose = params.onclose;
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this.onevent = params.onevent || ((event) => {
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console.warn(
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`onevent() callback not defined for subscription '${this.id}' in relay ${this.relay.url}. event received:`,
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event
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);
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});
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}
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fire() {
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this.relay.send('["REQ","' + this.id + '",' + JSON.stringify(this.filters).substring(1));
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this.eoseTimeoutHandle = setTimeout(this.receivedEose.bind(this), this.eoseTimeout);
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}
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receivedEose() {
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if (this.eosed)
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return;
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clearTimeout(this.eoseTimeoutHandle);
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this.eosed = true;
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|
this.oneose?.();
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}
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|
close(reason = "closed by caller") {
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if (!this.closed && this.relay.connected) {
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|
try {
|
|
this.relay.send('["CLOSE",' + JSON.stringify(this.id) + "]");
|
|
} catch (err) {
|
|
if (err instanceof SendingOnClosedConnection) {
|
|
} else {
|
|
throw err;
|
|
}
|
|
}
|
|
this.closed = true;
|
|
}
|
|
this.relay.openSubs.delete(this.id);
|
|
this.onclose?.(reason);
|
|
}
|
|
};
|