506 lines
11 KiB
TypeScript
506 lines
11 KiB
TypeScript
// @ts-ignore
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import Hyperswarm from "@lumeweb/hyperswarm-web";
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import type { ActiveQuery } from "libkmodule";
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import { addHandler, getSeed, handleMessage } from "libkmodule";
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import { handlePresentSeed as handlePresentSeedModule } from "libkmodule/dist/seed.js";
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import type { Buffer } from "buffer";
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import * as ed from "@noble/ed25519";
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import b4a from "b4a";
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import { pubKeyToIpv6 } from "./addr.js";
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import { EventEmitter2 as EventEmitter } from "eventemitter2";
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import { logErr } from "libkmodule/dist";
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// @ts-ignore
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import Protomux from "protomux";
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import { Mutex } from "async-mutex";
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const MAX_PEER_LISTENERS = 20;
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interface SwarmConnection {
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swarm: number;
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conn: any;
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}
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interface SwarmEvents {
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swarm: number;
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events: EventEmitter;
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}
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const connections = new Map<number, SwarmConnection>();
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const swarmInstances = new Map<number, Hyperswarm>();
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const swarmEvents = new Map<number, SwarmEvents>();
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let defaultSwarm: Hyperswarm;
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let moduleReadyResolve: Function;
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let moduleReady: Promise<void> = new Promise((resolve) => {
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moduleReadyResolve = resolve;
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});
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onmessage = handleMessage;
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function idFactory(start = 1) {
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let id = start;
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return function nextId() {
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const nextId = id;
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id += 1;
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return nextId;
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};
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}
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const getSwarmId = idFactory();
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const getSocketId = idFactory();
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addHandler("presentSeed", handlePresentSeed);
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addHandler("join", handleJoin);
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addHandler("getPeerByPubkey", handleGetPeerByPubkey);
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addHandler("addRelay", handleAddRelay);
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addHandler("removeRelay", handleRemoveRelay);
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addHandler("clearRelays", handleClearRelays);
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addHandler("getRelays", handleGetRelays);
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addHandler("init", handleInit);
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addHandler("ready", handleReady);
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addHandler("listenConnections", handleListenConnections, {
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receiveUpdates: true,
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});
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addHandler("socketGetInfo", handleGetSocketInfo);
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addHandler("socketExists", handleSocketExists);
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addHandler("socketListenEvent", handleSocketListenEvent, {
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receiveUpdates: true,
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});
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addHandler("socketWrite", handleWriteSocketEvent);
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addHandler("socketClose", handleCloseSocketEvent);
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addHandler("syncProtomux", handleSyncProtomux, {
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receiveUpdates: true,
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});
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async function handlePresentSeed(aq: ActiveQuery) {
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const pubkey = await ed.getPublicKey(aq.callerInput.rootKey);
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handlePresentSeedModule({
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callerInput: {
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seed: {
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publicKey: await ed.getPublicKey(aq.callerInput.rootKey),
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secretKey: b4a.concat([aq.callerInput.rootKey, pubkey]),
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},
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},
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} as ActiveQuery);
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if (!defaultSwarm) {
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defaultSwarm = swarmInstances.get(await createSwarm()) as Hyperswarm;
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}
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moduleReadyResolve();
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}
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async function createSwarm(): Promise<number> {
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const swarmInstance = new Hyperswarm({ keyPair: await getSeed() });
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const id = getSwarmId();
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swarmInstances.set(id, swarmInstance);
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swarmInstance.onSelf("init", () => {
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const swarmInstanceEvents = new EventEmitter();
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swarmInstanceEvents.setMaxListeners(MAX_PEER_LISTENERS);
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swarmEvents.set(id, { swarm: id, events: swarmInstanceEvents });
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swarmInstance.on("connection", (peer: any) => {
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const socketId = getSocketId();
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connections.set(socketId, {
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swarm: id,
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conn: peer,
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});
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peer.once("close", () => {
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connections.delete(socketId);
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});
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swarmInstanceEvents.emit("connection", peer);
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});
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});
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swarmInstance.onSelf("close", (...args) => {
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swarmEvents.get(id)?.events.emit("close", ...args);
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swarmEvents.get(id)?.events.removeAllListeners();
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swarmEvents.delete(id);
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});
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return id;
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}
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function handleSocketListenEvent(aq: ActiveQuery) {
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const { event = null } = aq.callerInput;
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const socket = validateConnection(aq);
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if (!socket) {
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return;
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}
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if (!event) {
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aq.reject("Invalid event");
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return;
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}
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let responded = false;
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const respond = () => {
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if (responded) {
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return;
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}
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responded = true;
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aq.respond();
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};
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const cb = (data: Buffer) => {
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aq.sendUpdate(data);
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};
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socket.on(event, cb);
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socket.once("close", () => {
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socket.off(event, cb);
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respond();
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});
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aq.setReceiveUpdate?.(() => {
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socket.off(event, cb);
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respond();
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});
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}
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async function handleSocketExists(aq: ActiveQuery) {
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const { id = null } = aq.callerInput;
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aq.respond(connections.has(Number(id)));
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}
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function handleCloseSocketEvent(aq: ActiveQuery) {
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const socket = validateConnection(aq);
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if (!socket) {
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return;
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}
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socket.end();
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aq.respond();
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}
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function handleWriteSocketEvent(aq: ActiveQuery) {
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const socket = validateConnection(aq);
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if (!socket) {
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return;
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}
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const { message = null } = aq.callerInput;
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if (!message) {
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aq.reject("empty message");
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return false;
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}
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socket.write(message);
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aq.respond();
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}
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function validateConnection(aq: ActiveQuery): any | boolean {
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const { id = null } = aq.callerInput;
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if (!id || !connections.has(id)) {
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aq.reject("Invalid connection id");
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return false;
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}
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return connections.get(id)?.conn;
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}
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async function getSwarm(aq: ActiveQuery): Promise<Hyperswarm> {
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await moduleReady;
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let swarm;
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if ("callerInput" in aq && aq.callerInput) {
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swarm = aq.callerInput.swarm ?? null;
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if (swarm && !swarmInstances.has(swarm)) {
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const error = "Invalid swarm id";
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aq.reject(error);
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throw new Error(error);
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}
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}
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if (!swarm) {
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if (defaultSwarm.activeRelay && defaultSwarm.ready) {
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await defaultSwarm.activeRelay.dht._protocol.opened;
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}
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return defaultSwarm;
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}
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if (swarm.activeRelay && swarm.ready) {
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await swarm.activeRelay.dht._protocol.opened;
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}
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return swarmInstances.get(swarm) as Hyperswarm;
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}
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async function handleAddRelay(aq: ActiveQuery) {
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const { pubkey = null } = aq.callerInput;
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if (!pubkey) {
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aq.reject("invalid pubkey");
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return;
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}
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const swarm = await getSwarm(aq);
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aq.respond(await swarm.addRelay(pubkey));
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}
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async function handleRemoveRelay(aq: ActiveQuery) {
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const { pubkey = null } = aq.callerInput;
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if (!pubkey) {
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aq.reject("invalid pubkey");
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return;
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}
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const swarm = await getSwarm(aq);
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aq.respond(swarm.removeRelay(pubkey));
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}
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async function handleClearRelays(aq: ActiveQuery) {
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const swarm = await getSwarm(aq);
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swarm.clearRelays();
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aq.respond();
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}
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async function handleGetRelays(aq: ActiveQuery) {
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aq.respond(await (await getSwarm(aq)).relays);
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}
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async function handleJoin(aq: ActiveQuery) {
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const { topic = null } = aq.callerInput;
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const swarm = await getSwarm(aq);
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if (!topic) {
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aq.reject("invalid topic");
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return;
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}
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if (!b4a.isBuffer(topic)) {
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aq.reject("topic must be a buffer");
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return;
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}
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// @ts-ignore
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swarm.join(topic, { server: false });
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aq.respond();
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}
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async function handleGetPeerByPubkey(aq: ActiveQuery) {
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const { pubkey = null } = aq.callerInput;
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const swarm = await getSwarm(aq);
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if (!pubkey) {
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aq.reject("invalid topic");
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return;
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}
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if (!b4a.isBuffer(pubkey)) {
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aq.reject("pubkey must be a buffer");
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return;
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}
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// @ts-ignore
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if (!swarm._allConnections.has(pubkey)) {
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aq.reject("peer does not exist");
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return;
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}
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// @ts-ignore
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const peer = swarm._allConnections.get(pubkey);
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aq.respond(getSwarmToSocketConnectionId(peer));
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}
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async function handleInit(aq: ActiveQuery) {
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const swarm = await getSwarm(aq);
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try {
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await swarm.init();
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} catch (e) {
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aq.reject((e as Error).message);
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return;
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}
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aq.respond();
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}
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async function handleReady(aq: ActiveQuery) {
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const swarm = await getSwarm(aq);
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if (swarm.activeRelay && swarm.ready) {
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aq.respond();
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await swarm.activeRelay.dht._protocol.opened;
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return;
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}
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swarm.once("ready", async () => {
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await swarm.activeRelay.dht._protocol.opened;
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aq.respond();
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});
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}
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async function handleListenConnections(aq: ActiveQuery) {
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const swarm = await getSwarm(aq);
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const swarmId = getSwarmToSwarmId(swarm);
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const listener = (peer: any) => {
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aq.sendUpdate(getSwarmToSocketConnectionId(peer));
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};
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const swarmEvent = swarmEvents.get(swarmId as number)?.events;
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if (!swarmEvent) {
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logErr("swarm event object is missing");
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}
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swarmEvent?.on("connection", listener);
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aq.setReceiveUpdate?.(() => {
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swarmEvent?.off("connection", listener);
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aq.respond();
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});
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for (const conn of connections) {
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if (conn[1].swarm === swarmId) {
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listener(conn[1].conn);
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}
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}
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const closeCb = () => {
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swarmEvent?.off("connection", listener);
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swarmEvent?.emit("close");
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aq.respond();
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};
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const hookClose = () => {
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swarmEvent?.once("close", closeCb);
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};
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if (swarm.activeRelay) {
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hookClose();
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return;
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}
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swarm.onceSelf("ready", hookClose);
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}
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async function handleGetSocketInfo(aq: ActiveQuery) {
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const socket = validateConnection(aq);
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if (!socket) {
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return;
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}
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aq.respond({
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remotePublicKey: socket.remotePublicKey,
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publicKey: socket.publicKey,
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rawStream: {
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remoteHost: pubKeyToIpv6(socket.remotePublicKey),
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remotePort: 0,
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remoteFamily: "IPv6",
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},
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});
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}
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async function handleSyncProtomux(aq: ActiveQuery) {
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const socket = validateConnection(aq);
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if (!socket) {
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return;
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}
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if (!("action" in aq.callerInput)) {
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aq.reject("action required");
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return;
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}
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if (!("data" in aq.callerInput)) {
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aq.reject("data required");
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return;
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}
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if (isNaN(parseInt(aq.callerInput))) {
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aq.reject("data must be a number");
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return;
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}
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const mux = Protomux.from(socket);
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let mutex: Mutex | null = null;
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if (mux.mutex) {
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mutex = mux.mutex;
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}
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if (!mutex) {
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mutex = new Mutex();
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mux.mutex = mutex;
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}
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await mutex.acquire();
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const data = aq.callerInput.data;
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let ret;
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switch (aq.callerInput.action) {
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case "popFree":
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if (mux._free.includes(data)) {
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mux._free[mux._free.indexOf(data)] = null;
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mux._free = mux._free.filter((item: number) => item !== null);
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}
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break;
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case "pushFree":
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mux._free.push(data);
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mux._free = Array.from(new Set(mux._free));
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break;
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case "pushLocal":
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if (typeof mux._local[data] === "undefined") {
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mux._local[data] = null;
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}
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break;
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case "pushRemote":
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if (typeof mux._remote[data] === "undefined") {
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mux._remote[data] = null;
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}
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break;
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case "pullFree":
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ret = Object.values(mux._free);
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break;
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case "pullLocal":
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ret = Object.keys(mux._local);
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break;
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case "pullRemote":
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ret = Object.keys(mux._remote);
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break;
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}
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aq.respond(ret);
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}
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function getSwarmToSocketConnectionId(socket: any) {
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for (const conn of connections) {
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if (conn[1].conn === socket) {
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return conn[0];
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}
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}
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return false;
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}
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function getSwarmToSwarmId(swarm: any) {
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for (const swarmInstance of swarmInstances) {
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if (swarmInstance[1] === swarm) {
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return swarmInstance[0];
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}
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}
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return false;
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}
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