dht-data/src/index.ts

import DHTOnlineBase from "./dhtOnlineBase.js";
import DHTFlood from "@lumeweb/dht-flood";

const DISCONNECT_SMOOTH = 500;

export default class DHTOnline extends DHTOnlineBase {
  private flood: DHTFlood;

  constructor(
    swarm: any,
    {
      id = swarm.keyPair.publicKey,
      data = {},
      ...opts
    }: { id?: Buffer; data?: {}; [key: string]: any } = {}
  ) {
    super(id, { swarm, ...(opts as any) });
    this.flood = new DHTFlood({ id, swarm, ...opts });

    this.flood.on("peer-open", (peer) => this.handlePeerAdd(peer));
    this.flood.on("peer-remove", (peer) => this.handlePeerRemove(peer));
    this.flood.on("message", (message, id) => this.onGetBroadcast(message, id));

    this.swarm.on("connection", (peer: any) =>
      this.flood.send(peer, Buffer.from("hello"), 0)
    );

    this.data = data;

    [...this.swarm.peers.values()].forEach(this.handlePeerAdd.bind(this));
  }

  handlePeerAdd(peer: any) {
    const id = peer.remotePublicKey;
    this.onAddPeer(id);
  }

  handlePeerRemove(peer: any) {
    const id = peer.remotePublicKey;
    // Wait for a bit and check if we're still disconnected before removing the peer
    setTimeout(() => {
      if (this.swarm._allConnections.has(id)) {
        return;
      }
      this.onRemovePeer(id);
    }, DISCONNECT_SMOOTH);
  }

  broadcast(message: any, ttl?: number) {
    this.flood.broadcast(message, ttl);
  }
}