hyperdiscovery

See hyperswarm replicator for similar functionality.

More info on active projects and modules at dat-ecosystem.org

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hyperdiscovery

Old documentation below

This library is compatible with hypercore<=v7, which is now out of date.

Join the p2p swarm for hypercore and hyperdrive. Uses discovery-swarm under the hood. Also works in web browsers using discovery-swarm-web.

This module only works

npm install hyperdiscovery

Usage

Run the following code in two different places and they will replicate the contents of the given ARCHIVE_KEY.

var hyperdrive = require('hyperdrive')
var hypercore = require('hypercore')
var Discovery = require('hyperdiscovery')

var archive = hyperdrive('./database', 'ARCHIVE_KEY')
var discovery = Discovery(archive)
discovery.on('connection', function (peer, type) {
  console.log('got', peer, type)
  console.log('connected to', discovery.connections, 'peers')
  peer.on('close', function () {
    console.log('peer disconnected')
  })
})

// add another archive/feed later
var feed = hypercore('./feed')
discovery.add(feed) // adds this hypercore feed to the same discovery swarm

Will use discovery-swarm to attempt to connect peers. Uses dat-swarm-defaults for peer introduction defaults on the server side, which can be overwritten (see below).

The module can also create and join a swarm for a hypercore feed:

var hypercore = require('hypercore')
var Discovery = require('hyperdiscovery')

var feed = hypercore('/feed')
var discovery = Discovery(feed)

API

var discovery = Discovery(archive, opts)

Join the p2p swarm for the given feed. The return object, discovery, is an event emitter that will emit a peer event with the peer information when a peer is found.

discovery.add(archive, [opts])

Add an archive/feed to the discovery swarm. Options will be passed to discovery-swarm. If you pass opts.announce as a falsy value you don't announce your port (discover-only mode).

discovery.totalConnections

Get length of the list of total active connections, across all archives and feeds.

discovery.leave(discoveryKey)

Leave discovery for a specific discovery key.

discovery.rejoin(discoveryKey)

Rejoin discovery for a discovery key (*must be added first using discovery.add).

discovery.close()

Exit the swarm, close all replication streams.

Options

• stream: function, replication stream for connection. Default is archive.replicate({live, upload, download}).
• upload: bool, upload data to the other peer?
• download: bool, download data from the other peer?
• port: port for discovery swarm
• utp: use utp in discovery swarm
• tcp: use tcp in discovery swarm
• bootstrap: [string], WebRTC bootstrap signal servers for web
• discovery: string, discovery-swarm-stream server for web

Defaults from datland-swarm-defaults can also be overwritten:

• dns.server: DNS server
• dns.domain: DNS domain
• dht.bootstrap: distributed hash table bootstrapping nodes

Debugging

Set DEBUG='*' in the environment to enable debugging output inside discovery-swarm.

See Also

• mafintosh/hypercore
• mafintosh/hyperdrive
• mafintosh/hyperdb
• mafintosh/discovery-swarm
• discovery-swarm-web

License

ISC