import { Client, factory } from "@lumeweb/libkernel-universal"; import { hexToBuf } from "@siaweb/libweb"; import { blake2b } from "@noble/hashes/blake2b"; import b4a from "b4a"; // @ts-ignore import Backoff from "backoff.js"; export class SwarmClient extends Client { useDefaultSwarm; id = 0; _autoReconnect; _connectBackoff; _ready; _connectionListener; _topics = new Set(); _sockets = new Map(); get dht() { const self = this; return { async ready() { return self.ready(); }, }; } constructor(useDefaultDht = true, autoReconnect = false) { super(); this.useDefaultSwarm = useDefaultDht; this._autoReconnect = autoReconnect; this._connectBackoff = new Backoff({ strategy: "fibo", maxAttempts: Number.MAX_SAFE_INTEGER, }); this._connectBackoff.on("retry", (error) => { this.logErr(error); }); } get swarm() { return this.useDefaultSwarm ? undefined : this.id; } async connect(pubkey) { if (typeof pubkey === "string") { const buf = hexToBuf(pubkey); pubkey = this.handleErrorOrReturn(buf); } let existing = Array.from(this._sockets.values()).filter((socket) => { return b4a.equals(socket.remotePublicKey, pubkey); }); if (existing.length) { return existing[0]; } throw new Error("not implemented"); } async init() { return await this.callModuleReturn("init", { swarm: this.swarm }); } async ready() { if (this._ready) { return this._ready; } this._listen(); this._ready = this.callModuleReturn("ready", { swarm: this.swarm }); await this._ready; this._ready = undefined; for (const topic of this._topics) { await this.join(topic); } } async start() { await this._connectBackoff.run(() => this.init()); await this.ready(); } async _listen() { if (!this._connectionListener) { this._connectionListener = this.connectModule("listenConnections", { swarm: this.swarm }, async (socketId) => { const socket = this._sockets.get(socketId) ?? (await createSocket(socketId)); socket.on("close", () => { this._sockets.delete(socketId); }); if (!this._sockets.has(socketId)) { this._sockets.set(socketId, socket); } this.emit("connection", socket); }); } await this._connectionListener[1]; this._connectionListener = undefined; this.start(); } async addRelay(pubkey) { return this.callModuleReturn("addRelay", { pubkey, swarm: this.swarm }); } async removeRelay(pubkey) { return this.callModuleReturn("removeRelay", { pubkey, swarm: this.swarm }); } async clearRelays() { return this.callModuleReturn("clearRelays", { swarm: this.swarm }); } async getRelays() { return this.callModuleReturn("getRelays", { swarm: this.swarm }); } async join(topic) { if (typeof topic === "string") { topic = blake2b(topic, { dkLen: 32 }); } this._topics.add(topic); this.callModule("join", { id: this.id, topic }); } } export class Socket extends Client { id; eventUpdates = {}; constructor(id) { super(); this.id = id; } _remotePublicKey; get remotePublicKey() { return this._remotePublicKey; } _rawStream; get rawStream() { return this._rawStream; } async setup() { let info = await this.callModuleReturn("socketGetInfo", { id: this.id }); this._remotePublicKey = info.remotePublicKey; this._rawStream = info.rawStream; } on(event, fn, context) { const [update, promise] = this.connectModule("socketListenEvent", { id: this.id, event: event }, (data) => { this.emit(event, data); }); this.trackEvent(event, update); promise.then(() => { this.off(event, fn); }); return super.on(event, fn, context); } off(event, fn, context, once) { const updates = [...this.eventUpdates[event]]; this.eventUpdates[event] = []; for (const func of updates) { func(); } return super.off(event, fn, context, once); } write(message) { this.callModule("socketWrite", { id: this.id, message }); } end() { this.callModule("socketExists", { id: this.id }).then(([exists]) => { if (exists) { this.callModule("socketClose", { id: this.id }); } }); } ensureEvent(event) { if (!(event in this.eventUpdates)) { this.eventUpdates[event] = []; } } trackEvent(event, update) { this.ensureEvent(event); this.eventUpdates[event].push(update); } } const MODULE = "_A4zfYX8-ExD-4m2wGpYDVwOg3jCFj2FXthhf-5GHEVgsQ"; export const createClient = factory(SwarmClient, MODULE); const socketFactory = factory(Socket, MODULE); const createSocket = async (...args) => { const socket = socketFactory(...args); await socket.setup(); return socket; };