relay/src/dht.ts

import {createRequire} from "module";

const require = createRequire(import.meta.url);
const DHT = require("@hyperswarm/dht");
import {errorExit} from "./util.js";
import {
    deriveMyskyRootKeypair,
    ed25519Keypair,
    seedPhraseToSeed,
    validSeedPhrase,
} from "libskynet";
import config from "./config.js";

let node: {
    ready: () => any;
    createServer: () => any;
    defaultKeyPair: any;
    on: any;
};
let server: {
    listen: (arg0: ed25519Keypair) => any;
    on: any;
};

async function start() {
    const seed = config.str("relay-seed");

    let [, err] = validSeedPhrase(seed);
    if (err !== null) {
        errorExit("RELAY_SEED is invalid. Aborting.");
    }

    const keyPair = deriveMyskyRootKeypair(seedPhraseToSeed(seed)[0]);

    node = new DHT({keyPair});

    await node.ready();

    server = node.createServer();
    await server.listen(keyPair);

    return node;
}

export async function get(
    ret: "server" | "dht" = "dht"
): Promise<typeof server | typeof node> {
    if (!node) {
        await start();
    }

    if (ret == "server") {
        return server;
    }

    return node;
}