*rewrite for new design

This commit is contained in:
Derrick Hammer 2023-01-31 05:10:12 -05:00
parent f8b5bcab64
commit 35e394fec4
Signed by: pcfreak30
GPG Key ID: C997C339BE476FF2
3 changed files with 900 additions and 175 deletions

View File

@ -1,5 +1,5 @@
{ {
"name": "@lumeweb/dht-web", "name": "@lumeweb/hyperswarm-web",
"type": "module", "type": "module",
"version": "0.1.0", "version": "0.1.0",
"main": "dist/index.js", "main": "dist/index.js",
@ -8,21 +8,16 @@
}, },
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"@hyperswarm/dht-relay": "^0.3.0", "@hyperswarm/dht-relay": "^0.3.0",
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"libkernel": "^0.1.41", "@lumeweb/libkernel-universal": "git+https://git.lumeweb.com/LumeWeb/libkernel-universal.git",
"libkmodule": "^0.2.12", "hyperswarm": "^4.3.7"
"libskynet": "^0.0.48",
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"random-number-csprng": "^1.0.2",
"safe-buffer": "^5.2.1",
"websocket-pool": "^1.3.1"
} }
} }

781
pnpm-lock.yaml Normal file
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@ -0,0 +1,781 @@
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version: 0.1.0
dependencies:
b4a: 1.6.1
dev: false

View File

@ -2,99 +2,80 @@
import DhtNode from "@hyperswarm/dht-relay"; import DhtNode from "@hyperswarm/dht-relay";
// @ts-ignore // @ts-ignore
import Stream from "@hyperswarm/dht-relay/ws"; import Stream from "@hyperswarm/dht-relay/ws";
// @ts-ignore import { createClient } from "@lumeweb/kernel-peer-discovery-client";
import createRoundRobin from "@derhuerst/round-robin-scheduler"; import type {
// @ts-ignore PeerDiscoveryClient,
// @ts-ignore Peer,
import { blake2b, errTuple, hexToBuf } from "libskynet"; } from "@lumeweb/kernel-peer-discovery-client";
// @ts-ignore import { load } from "@lumeweb/libkernel-universal";
import { registryRead } from "libkmodule";
import { unpack } from "msgpackr"; // @ts-ignore
import Hyperswarm from "hyperswarm";
import randomNumber from "random-number-csprng"; import randomNumber from "random-number-csprng";
import EventEmitter from "node:events";
const REGISTRY_DHT_KEY = "lumeweb-dht-node"; export default class HyperswarmWeb extends EventEmitter {
export default class DHT {
private _options: any; private _options: any;
private _relays: Map<string, string> = new Map(); private _relays: Set<string> = new Set();
private _activeRelays: Map<string, typeof DhtNode> = new Map(); private _activeRelay: Hyperswarm;
private _maxConnections = 10; private _discovery: PeerDiscoveryClient;
private _inited = false; constructor(opts: any = {}) {
super();
constructor(opts = {}) {
// @ts-ignore
opts.custodial = false; opts.custodial = false;
this._options = opts; this._options = opts;
this._discovery = createClient();
} }
ready(): Promise<void> { ready(): Promise<void> {
if (this._inited) { return this.ensureConnection();
return Promise.resolve();
}
this._inited = true;
return this.fillConnections();
} }
get relays(): string[] { private async ensureConnection(): Promise<any> {
return [...this._relays.keys()]; const logErr = (await load()).logErr;
}
get relayServers(): string[] { if (this._activeRelay) {
return [...this._relays.values()]; return;
}
public async addRelay(pubkey: string): Promise<boolean> {
let entry: errTuple = await registryRead(
hexToBuf(pubkey).shift() as Uint8Array,
hashDataKey(REGISTRY_DHT_KEY)
);
if (entry[1] || !entry[0]?.exists) {
return false;
} }
let host; const relays = this.relays;
try { do {
host = unpack(entry[0].entryData); const index = await randomNumber(0, relays.length - 1);
} catch (e) { const relay = relays[index];
return false;
let ret;
try {
ret = await this._discovery.discover(relay);
} catch (e) {
logErr(e);
relays.splice(index, 1);
continue;
}
ret = ret as Peer;
const connection = `wss://${ret.host}:${ret.port}`;
if (!(await this.isServerAvailable(connection))) {
relays.splice(index, 1);
continue;
}
this._activeRelay = new DhtNode(
new Stream(true, new WebSocket(connection)),
this._options
);
this._activeRelay.on("close", () => {
this._activeRelay = undefined;
});
} while (relays.length > 0);
if (!this._activeRelay) {
throw new Error("Failed to find an available relay");
} }
const [domain, port] = host.split(":"); await this._activeRelay.dht.ready();
if (isNaN(parseInt(port))) {
return false;
}
this._relays.set(pubkey, `wss://${domain}:${port}/`);
if (this._inited) {
await this.fillConnections();
}
return true;
}
public removeRelay(pubkey: string): boolean {
if (!this._relays.has(pubkey)) {
return false;
}
if (this._activeRelays.has(pubkey)) {
this._activeRelays.get(pubkey).destroy();
this._activeRelays.delete(pubkey);
}
this._relays.delete(pubkey);
return true;
}
public clearRelays(): void {
[...this._relays.keys()].forEach(this.removeRelay);
} }
private async isServerAvailable(connection: string): Promise<boolean> { private async isServerAvailable(connection: string): Promise<boolean> {
@ -109,99 +90,67 @@ export default class DHT {
}); });
}); });
} }
async connect(pubkey: string, options = {}): Promise<DhtNode> { async connect(pubkey: string, options = {}): Promise<DhtNode> {
if (this._activeRelays.size === 0) { if (!this._activeRelay) {
await this.fillConnections(); await this.ensureConnection();
}
if (this._activeRelays.size === 0) {
throw new Error("Failed to find an available relay");
} }
let index = 0; return this._activeRelay.connect(pubkey, options);
if (this._activeRelays.size > 1) {
index = await randomNumber(0, this._activeRelays.size - 1);
}
const node = this._activeRelays.get([...this._activeRelays.keys()][index]);
return node.connect(pubkey, options);
} }
private async fillConnections(): Promise<any> { get relays(): string[] {
let available: string[] = []; return [...this._relays.values()];
}
const updateAvailable = () => { public async addRelay(pubkey: string): Promise<void> {
available = [...this._relays.keys()].filter( this._relays.add(pubkey);
(x) => ![...this._activeRelays.keys()].includes(x) }
);
};
updateAvailable();
let relayPromises = []; public removeRelay(pubkey: string): boolean {
while ( if (!this._relays.has(pubkey)) {
this._activeRelays.size <= return false;
Math.min(this._maxConnections, available.length)
) {
if (0 === available.length) {
break;
}
let relayIndex = 0;
if (available.length > 1) {
relayIndex = await randomNumber(0, available.length - 1);
}
const pubkey = available[relayIndex];
const connection = this._relays.get(available[relayIndex]) as string;
if (!(await this.isServerAvailable(connection))) {
available.splice(relayIndex, 1);
this.removeRelay(available[relayIndex]);
continue;
}
const node = new DhtNode(
new Stream(true, new WebSocket(connection)),
this._options
);
this._activeRelays.set(available[relayIndex], node);
updateAvailable();
relayPromises.push(node.ready());
node._protocol._stream.on("close", () => {
this._activeRelays.delete(pubkey);
});
} }
return Promise.allSettled(relayPromises); this._relays.delete(pubkey);
return true;
}
public clearRelays(): void {
this._relays.clear();
}
on(
eventName: string | symbol,
listener: (...args: any[]) => void
): Hyperswarm {
return this._activeRelay?.on(eventName, listener);
}
addListener(
eventName: string | symbol,
listener: (...args: any[]) => void
): this {
return this.on(eventName, listener);
}
off(
eventName: string | symbol,
listener: (...args: any[]) => void
): Hyperswarm {
return this._activeRelay?.off(eventName, listener);
}
removeListener(
eventName: string | symbol,
listener: (...args: any[]) => void
): this {
return this.on(eventName, listener);
}
emit(eventName: string | symbol, ...args: any[]): boolean {
return this._activeRelay?.emit(eventName, ...args);
}
once(eventName: string | symbol, listener: (...args: any[]) => void): this {
return this._activeRelay?.once(eventName, listener);
} }
} }
export function hashDataKey(dataKey: string): Uint8Array {
return blake2b(encodeUtf8String(dataKey));
}
function encodeUtf8String(str: string): Uint8Array {
const byteArray = stringToUint8ArrayUtf8(str);
const encoded = new Uint8Array(8 + byteArray.length);
encoded.set(encodeNumber(byteArray.length));
encoded.set(byteArray, 8);
return encoded;
}
function stringToUint8ArrayUtf8(str: string): Uint8Array {
return new TextEncoder().encode(str);
}
function encodeNumber(num: number): Uint8Array {
const encoded = new Uint8Array(8);
for (let index = 0; index < encoded.length; index++) {
encoded[index] = num & 0xff;
num = num >> 8;
}
return encoded;
}