chore: release version v0.26.2

* fix: allow pubsub sub/unsub via promises

* chore: fix linting errors

.aegir.js

@@ -1,76 +1,134 @@
 'use strict'
 
-const PeerInfo = require('peer-info')
-const PeerId = require('peer-id')
 const pull = require('pull-stream')
-const parallel = require('async/parallel')
-
 const WebSocketStarRendezvous = require('libp2p-websocket-star-rendezvous')
 const sigServer = require('libp2p-webrtc-star/src/sig-server')
+const promisify = require('promisify-es6')
+const mplex = require('pull-mplex')
+const spdy = require('libp2p-spdy')
+const PeerBook = require('peer-book')
+const PeerId = require('peer-id')
+const PeerInfo = require('peer-info')
+const path = require('path')
+const Switch = require('./src/switch')
+const WebSockets = require('libp2p-websockets')
 
-const rawPeer = require('./test/fixtures/test-peer.json')
 const Node = require('./test/utils/bundle-nodejs.js')
+const {
+  getPeerRelay,
+  WRTC_RENDEZVOUS_MULTIADDR,
+  WS_RENDEZVOUS_MULTIADDR
+} = require('./test/utils/constants')
 
 let wrtcRendezvous
 let wsRendezvous
 let node
+let peerInfo
+let switchA
+let switchB
 
-const before = (done) => {
-  parallel([
-    (cb) => {
-      sigServer.start({
-        port: 15555
-        // cryptoChallenge: true TODO: needs https://github.com/libp2p/js-libp2p-webrtc-star/issues/128
-      }, (err, server) => {
-        if (err) {
-          return cb(err)
-        }
-        wrtcRendezvous = server
-        cb()
-      })
-    },
-    (cb) => {
-      WebSocketStarRendezvous.start({
-        port: 14444,
-        refreshPeerListIntervalMS: 1000,
-        strictMultiaddr: false,
-        cryptoChallenge: true
-      }, (err, _server) => {
-        if (err) {
-          return cb(err)
-        }
-        wsRendezvous = _server
-        cb()
-      })
-    },
-    (cb) => {
-      PeerId.createFromJSON(rawPeer, (err, peerId) => {
-        if (err) {
-          return done(err)
-        }
-        const peer = new PeerInfo(peerId)
-
-        peer.multiaddrs.add('/ip4/127.0.0.1/tcp/9200/ws')
-
-        node = new Node({
-          peerInfo: peer
-        })
-        node.handle('/echo/1.0.0', (protocol, conn) => pull(conn, conn))
-        node.start(cb)
-      })
-    }
-  ], done)
+function echo (protocol, conn) { pull(conn, conn) }
+function idJSON (id) {
+  const p = path.join(__dirname, `./test/switch/test-data/id-${id}.json`)
+  return require(p)
 }
 
-const after = (done) => {
-  setTimeout(() =>
-    parallel(
-      [node, wrtcRendezvous, wsRendezvous].map((s) => (cb) => s.stop(cb)),
-      done),
-  2000)
+function createSwitchA () {
+  return new Promise((resolve, reject) => {
+    PeerId.createFromJSON(idJSON(1), (err, id) => {
+      if (err) { return reject(err) }
+
+      const peerA = new PeerInfo(id)
+      const maA = '/ip4/127.0.0.1/tcp/15337/ws'
+
+      peerA.multiaddrs.add(maA)
+      const sw = new Switch(peerA, new PeerBook())
+
+      sw.transport.add('ws', new WebSockets())
+      sw.start((err) => {
+        if (err) { return reject(err) }
+        resolve(sw)
+      })
+    })
+  })
+}
+
+function createSwitchB () {
+  return new Promise((resolve, reject) => {
+    PeerId.createFromJSON(idJSON(2), (err, id) => {
+      if (err) { return reject(err) }
+
+      const peerB = new PeerInfo(id)
+      const maB = '/ip4/127.0.0.1/tcp/15347/ws'
+
+      peerB.multiaddrs.add(maB)
+      const sw = new Switch(peerB, new PeerBook())
+
+      sw.transport.add('ws', new WebSockets())
+      sw.connection.addStreamMuxer(mplex)
+      sw.connection.addStreamMuxer(spdy)
+      sw.connection.reuse()
+      sw.handle('/echo/1.0.0', echo)
+      sw.start((err) => {
+        if (err) { return reject(err) }
+        resolve(sw)
+      })
+    })
+  })
+}
+
+const before = async () => {
+  [
+    wrtcRendezvous,
+    wsRendezvous,
+    peerInfo,
+    switchA,
+    switchB
+  ] = await Promise.all([
+    sigServer.start({
+      port: WRTC_RENDEZVOUS_MULTIADDR.nodeAddress().port
+      // cryptoChallenge: true TODO: needs https://github.com/libp2p/js-libp2p-webrtc-star/issues/128
+    }),
+    WebSocketStarRendezvous.start({
+      port: WS_RENDEZVOUS_MULTIADDR.nodeAddress().port,
+      refreshPeerListIntervalMS: 1000,
+      strictMultiaddr: false,
+      cryptoChallenge: true
+    }),
+    getPeerRelay(),
+    createSwitchA(),
+    createSwitchB()
+  ])
+
+  node = new Node({
+    peerInfo,
+    config: {
+      relay: {
+        enabled: true,
+        hop: {
+          enabled: true,
+          active: true
+        }
+      }
+    }
+  })
+
+  node.handle('/echo/1.0.0', (protocol, conn) => pull(conn, conn))
+  await node.start()
+}
+
+const after = () => {
+  return Promise.all([
+    wrtcRendezvous.stop(),
+    wsRendezvous.stop(),
+    node.stop(),
+    promisify(switchA.stop, { context: switchA })(),
+    promisify(switchB.stop, { context: switchB })()
+  ])
 }
 
 module.exports = {
+  bundlesize: { maxSize: '220kB' },
   hooks: {
     pre: before,
     post: after

.gitignore

@@ -9,6 +9,7 @@ logs
 *.log
 
 coverage
+.nyc_output
 
 # Runtime data
 pids
@@ -41,3 +42,4 @@ test/test-data/go-ipfs-repo/LOG.old
 
 # while testing npm5
 package-lock.json
+yarn.lock

.npmignore

@@ -1,37 +0,0 @@
-**/node_modules/
-**/*.log
-test/repo-tests*
-img
-docs
-examples
-
-# Logs
-logs
-*.log
-
-coverage
-
-# Runtime data
-pids
-*.pid
-*.seed
-
-# Directory for instrumented libs generated by jscoverage/JSCover
-lib-cov
-
-# Coverage directory used by tools like istanbul
-coverage
-
-# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
-.grunt
-
-# node-waf configuration
-.lock-wscript
-
-build
-
-# Dependency directory
-# https://www.npmjs.org/doc/misc/npm-faq.html#should-i-check-my-node_modules-folder-into-git
-node_modules
-
-test

.travis.yml

@@ -0,0 +1,44 @@
+language: node_js
+cache: npm
+stages:
+  - check
+  - test
+  - cov
+
+node_js:
+  - '10'
+  - '12'
+
+os:
+  - linux
+  - osx
+
+script: npx nyc -s npm run test:node -- --bail
+after_success: npx nyc report --reporter=text-lcov > coverage.lcov && npx codecov
+
+jobs:
+  include:
+    - stage: check
+      script:
+        - npx aegir build --bundlesize
+        - npx aegir dep-check -- -i wrtc -i electron-webrtc
+        - npm run lint
+
+    - stage: test
+      name: chrome
+      addons:
+        chrome: stable
+      script:
+        - npx aegir test -t browser
+        - npx aegir test -t webworker
+
+    - stage: test
+      name: firefox
+      addons:
+        firefox: latest
+      script:
+        - npx aegir test -t browser -- --browsers FirefoxHeadless
+        - npx aegir test -t webworker -- --browsers FirefoxHeadless
+
+notifications:
+  email: false

CHANGELOG.md

@@ -1,3 +1,240 @@
+<a name="0.26.2"></a>
+## [0.26.2](https://github.com/libp2p/js-libp2p/compare/v0.26.1...v0.26.2) (2019-09-24)
+
+
+### Bug Fixes
+
+* pubsub promisify ([#456](https://github.com/libp2p/js-libp2p/issues/456)) ([ae6af20](https://github.com/libp2p/js-libp2p/commit/ae6af20))
+
+
+
+<a name="0.26.1"></a>
+## [0.26.1](https://github.com/libp2p/js-libp2p/compare/v0.26.0...v0.26.1) (2019-08-21)
+
+
+### Bug Fixes
+
+* avoid using superstruct interface ([aa95ab9](https://github.com/libp2p/js-libp2p/commit/aa95ab9))
+* improve config defaults ([#409](https://github.com/libp2p/js-libp2p/issues/409)) ([3eef695](https://github.com/libp2p/js-libp2p/commit/3eef695)), closes [#406](https://github.com/libp2p/js-libp2p/issues/406)
+* pubsub configuration ([#404](https://github.com/libp2p/js-libp2p/issues/404)) ([b0f124b](https://github.com/libp2p/js-libp2p/commit/b0f124b)), closes [#401](https://github.com/libp2p/js-libp2p/issues/401) [#401](https://github.com/libp2p/js-libp2p/issues/401) [#401](https://github.com/libp2p/js-libp2p/issues/401) [#401](https://github.com/libp2p/js-libp2p/issues/401) [#401](https://github.com/libp2p/js-libp2p/issues/401)
+* reference files directly to avoid npm install failures ([#408](https://github.com/libp2p/js-libp2p/issues/408)) ([b3deb35](https://github.com/libp2p/js-libp2p/commit/b3deb35))
+* reject rather than throw in get peer info ([#410](https://github.com/libp2p/js-libp2p/issues/410)) ([60b0cbc](https://github.com/libp2p/js-libp2p/commit/60b0cbc)), closes [#400](https://github.com/libp2p/js-libp2p/issues/400)
+
+
+
+<a name="0.26.0"></a>
+# [0.26.0](https://github.com/libp2p/js-libp2p/compare/v0.26.0-rc.3...v0.26.0) (2019-08-07)
+
+
+
+<a name="0.26.0-rc.3"></a>
+# [0.26.0-rc.3](https://github.com/libp2p/js-libp2p/compare/v0.26.0-rc.2...v0.26.0-rc.3) (2019-08-06)
+
+
+### Bug Fixes
+
+* promisified methods ([#398](https://github.com/libp2p/js-libp2p/issues/398)) ([ff7a6c8](https://github.com/libp2p/js-libp2p/commit/ff7a6c8))
+
+
+
+<a name="0.26.0-rc.2"></a>
+# [0.26.0-rc.2](https://github.com/libp2p/js-libp2p/compare/v0.26.0-rc.1...v0.26.0-rc.2) (2019-08-01)
+
+
+### Bug Fixes
+
+* dont override methods of created instance ([#394](https://github.com/libp2p/js-libp2p/issues/394)) ([3e95e6f](https://github.com/libp2p/js-libp2p/commit/3e95e6f))
+* pubsub default config ([#393](https://github.com/libp2p/js-libp2p/issues/393)) ([f4f3f0f](https://github.com/libp2p/js-libp2p/commit/f4f3f0f))
+
+
+### Chores
+
+* update switch ([#395](https://github.com/libp2p/js-libp2p/issues/395)) ([684f283](https://github.com/libp2p/js-libp2p/commit/684f283))
+
+
+### BREAKING CHANGES
+
+* switch configuration has changed.
+'blacklistTTL' is now 'denyTTL' and 'blackListAttempts' is now 'denyAttempts'
+
+
+
+<a name="0.26.0-rc.1"></a>
+# [0.26.0-rc.1](https://github.com/libp2p/js-libp2p/compare/v0.26.0-rc.0...v0.26.0-rc.1) (2019-07-31)
+
+
+
+<a name="0.26.0-rc.0"></a>
+# [0.26.0-rc.0](https://github.com/libp2p/js-libp2p/compare/v0.25.5...v0.26.0-rc.0) (2019-07-31)
+
+
+### Bug Fixes
+
+* make subscribe comply with ipfs interface ([#389](https://github.com/libp2p/js-libp2p/issues/389)) ([9554b05](https://github.com/libp2p/js-libp2p/commit/9554b05))
+
+
+### Features
+
+* integrate gossipsub by default ([#365](https://github.com/libp2p/js-libp2p/issues/365)) ([791f39a](https://github.com/libp2p/js-libp2p/commit/791f39a))
+* promisify all api methods that accept callbacks ([#381](https://github.com/libp2p/js-libp2p/issues/381)) ([df6ef45](https://github.com/libp2p/js-libp2p/commit/df6ef45))
+
+
+### BREAKING CHANGES
+
+* new configuration for deciding the implementation of pubsub to be used.
+In this context, the experimental flags were also removed. See the README for the latest usage.
+* The ipfs interface specified that options
+should be provided after the handler, not before.
+https://github.com/ipfs/interface-js-ipfs-core/blob/v0.109.0/SPEC/PUBSUB.md#pubsubsubscribe
+
+This corrects the order of parameters. See the jsdocs examples
+for subscribe to see how it should be used.
+
+
+
+<a name="0.25.5"></a>
+## [0.25.5](https://github.com/libp2p/js-libp2p/compare/v0.25.4...v0.25.5) (2019-07-12)
+
+
+### Bug Fixes
+
+* peer routing for delegate router ([#377](https://github.com/libp2p/js-libp2p/issues/377)) ([905c911](https://github.com/libp2p/js-libp2p/commit/905c911)), closes [/github.com/libp2p/go-libp2p-core/blob/6e566d10f4a5447317a66d64c7459954b969bdab/routing/query.go#L15-L24](https://github.com//github.com/libp2p/go-libp2p-core/blob/6e566d10f4a5447317a66d64c7459954b969bdab/routing/query.go/issues/L15-L24)
+
+
+
+<a name="0.25.4"></a>
+## [0.25.4](https://github.com/libp2p/js-libp2p/compare/v0.25.3...v0.25.4) (2019-06-07)
+
+
+### Features
+
+* add createLibp2p to generate a PeerInfo instance ([#367](https://github.com/libp2p/js-libp2p/issues/367)) ([04faf18](https://github.com/libp2p/js-libp2p/commit/04faf18))
+* pass libp2p as option to transport creation ([#363](https://github.com/libp2p/js-libp2p/issues/363)) ([b06ca1b](https://github.com/libp2p/js-libp2p/commit/b06ca1b))
+
+
+
+<a name="0.25.3"></a>
+## [0.25.3](https://github.com/libp2p/js-libp2p/compare/v0.25.2...v0.25.3) (2019-05-07)
+
+
+### Features
+
+* sign pubsub messages ([#362](https://github.com/libp2p/js-libp2p/issues/362)) ([40978a1](https://github.com/libp2p/js-libp2p/commit/40978a1))
+
+
+
+<a name="0.25.2"></a>
+## [0.25.2](https://github.com/libp2p/js-libp2p/compare/v0.25.1...v0.25.2) (2019-04-17)
+
+
+### Bug Fixes
+
+* dht config ([#359](https://github.com/libp2p/js-libp2p/issues/359)) ([f3801f0](https://github.com/libp2p/js-libp2p/commit/f3801f0))
+
+
+
+<a name="0.25.1"></a>
+## [0.25.1](https://github.com/libp2p/js-libp2p/compare/v0.25.0...v0.25.1) (2019-04-16)
+
+
+### Bug Fixes
+
+* bail when discovering self ([#357](https://github.com/libp2p/js-libp2p/issues/357)) ([f28dffb](https://github.com/libp2p/js-libp2p/commit/f28dffb))
+
+
+
+<a name="0.25.0"></a>
+# [0.25.0](https://github.com/libp2p/js-libp2p/compare/v0.25.0-rc.6...v0.25.0) (2019-04-12)
+
+
+### Bug Fixes
+
+* allow switch to be configured ([#354](https://github.com/libp2p/js-libp2p/issues/354)) ([eb5aa03](https://github.com/libp2p/js-libp2p/commit/eb5aa03))
+
+
+
+<a name="0.25.0-rc.6"></a>
+# [0.25.0-rc.6](https://github.com/libp2p/js-libp2p/compare/v0.25.0-rc.5...v0.25.0-rc.6) (2019-04-11)
+
+
+### Bug Fixes
+
+* connection emits ([#352](https://github.com/libp2p/js-libp2p/issues/352)) ([313b1ea](https://github.com/libp2p/js-libp2p/commit/313b1ea))
+* remove unneeded peerbook puts ([#348](https://github.com/libp2p/js-libp2p/issues/348)) ([e5f19e8](https://github.com/libp2p/js-libp2p/commit/e5f19e8))
+
+
+### Features
+
+* auto dial discovered peers ([#349](https://github.com/libp2p/js-libp2p/issues/349)) ([01aa447](https://github.com/libp2p/js-libp2p/commit/01aa447))
+
+
+
+<a name="0.25.0-rc.5"></a>
+# [0.25.0-rc.5](https://github.com/libp2p/js-libp2p/compare/v0.25.0-rc.4...v0.25.0-rc.5) (2019-03-21)
+
+
+### Bug Fixes
+
+* disable dht by default [#338](https://github.com/libp2p/js-libp2p/issues/338) ([#339](https://github.com/libp2p/js-libp2p/issues/339)) ([e52ce66](https://github.com/libp2p/js-libp2p/commit/e52ce66))
+
+
+### Features
+
+* update to the latest switch ([#336](https://github.com/libp2p/js-libp2p/issues/336)) ([eee60ed](https://github.com/libp2p/js-libp2p/commit/eee60ed))
+
+
+
+<a name="0.25.0-rc.4"></a>
+# [0.25.0-rc.4](https://github.com/libp2p/js-libp2p/compare/v0.25.0-rc.3...v0.25.0-rc.4) (2019-03-06)
+
+
+
+<a name="0.25.0-rc.3"></a>
+# [0.25.0-rc.3](https://github.com/libp2p/js-libp2p/compare/v0.25.0-rc.2...v0.25.0-rc.3) (2019-02-26)
+
+
+
+<a name="0.25.0-rc.2"></a>
+# [0.25.0-rc.2](https://github.com/libp2p/js-libp2p/compare/v0.25.0-rc.1...v0.25.0-rc.2) (2019-02-26)
+
+
+### Bug Fixes
+
+* make the config less restrictive ([#329](https://github.com/libp2p/js-libp2p/issues/329)) ([5f92acd](https://github.com/libp2p/js-libp2p/commit/5f92acd))
+
+
+
+<a name="0.25.0-rc.1"></a>
+# [0.25.0-rc.1](https://github.com/libp2p/js-libp2p/compare/v0.25.0-rc.0...v0.25.0-rc.1) (2019-02-21)
+
+
+### Bug Fixes
+
+* bundle-size ([#298](https://github.com/libp2p/js-libp2p/issues/298)) ([d497961](https://github.com/libp2p/js-libp2p/commit/d497961))
+* emit peer discovery for dht discovery ([9e7a080](https://github.com/libp2p/js-libp2p/commit/9e7a080))
+
+
+### Features
+
+* support unsubscribe all for pubsub ([#321](https://github.com/libp2p/js-libp2p/issues/321)) ([6e76aad](https://github.com/libp2p/js-libp2p/commit/6e76aad))
+
+
+
+<a name="0.24.4"></a>
+## [0.24.4](https://github.com/libp2p/js-libp2p/compare/v0.24.3...v0.24.4) (2019-01-04)
+
+
+
+<a name="0.24.3"></a>
+## [0.24.3](https://github.com/libp2p/js-libp2p/compare/v0.24.2...v0.24.3) (2018-12-14)
+
+
+### Bug Fixes
+
+* not started yet ([#297](https://github.com/libp2p/js-libp2p/issues/297)) ([fdfb7b4](https://github.com/libp2p/js-libp2p/commit/fdfb7b4))
+
+
+
 <a name="0.24.2"></a>
 ## [0.24.2](https://github.com/libp2p/js-libp2p/compare/v0.24.1...v0.24.2) (2018-12-04)
 

CONTRIBUTING.md

@@ -1,8 +1,8 @@
 # Contributing guidelines
 
-libp2p as a project, including js-libp2p and all of its modules, follows the [standard IPFS Community contributing guidelines](https://github.com/ipfs/community/blob/master/contribution-guidelines.md).
+libp2p as a project, including js-libp2p and all of its modules, follows the [standard IPFS Community contributing guidelines](https://github.com/ipfs/community/blob/master/CONTRIBUTING.md).
 
-We also adhere to the [IPFS JavaScript Community contributing guidelines](https://github.com/ipfs/community/blob/master/js-code-guidelines.md) which provide additional information of how to collaborate and contribute in the JavaScript implementation of libp2p.
+We also adhere to the [IPFS JavaScript Community contributing guidelines](https://github.com/ipfs/community/blob/master/CONTRIBUTING_JS.md) which provide additional information of how to collaborate and contribute in the JavaScript implementation of libp2p.
 
 We appreciate your time and attention for going over these. Please open an issue on [ipfs/community](https://github.com/ipfs/community) if you have any question.
 

ISSUE_TEMPLATE.md

@@ -39,5 +39,5 @@ One of following:
 This is for you! Please read, and then delete this text before posting it.
 The js-ipfs issues are only for bug reports and directly actionable features.
 
-Read https://github.com/ipfs/community/blob/master/contributing.md#reporting-issues if your issue doesn't fit either of those categories.
+Read https://github.com/ipfs/community/blob/master/CONTRIBUTING.md#reporting-issues if your issue doesn't fit either of those categories.
 -->

OKR.md

@@ -2,6 +2,10 @@
 
 We try to frame our ongoing work using a process based on quarterly Objectives and Key Results (OKRs). Objectives reflect outcomes that are challenging, but realistic. Results are tangible and measurable.
 
+## 2019 Q1
+
+Find the js-libp2p OKRs for 2019 Q1 at the [2019 Q1 libp2p OKRs Spreadsheet](https://docs.google.com/spreadsheets/d/11GKG1DBRIIAiQnHvLD7_IqWxDGsVdaZFpxJM6NWtXe8/edit#gid=1271182838)
+
 ## 2018 Q4
 
 Find the js-libp2p OKRs for 2018 Q4 at the [2018 Q4 libp2p OKRs Spreadsheet](https://docs.google.com/spreadsheets/d/1BYwmbVicgo6_tOHAbgiUXWge8Ej0qR1M_gAUulazmrg/edit#gid=1241853194)

PEER_DISCOVERY.md

@@ -0,0 +1,60 @@
+# Peer Discovery and Auto Dial
+
+**Synopsis**:
+* All peers discovered are emitted via `peer:discovery` so applications can take any desired action.
+* Libp2p defaults to automatically connecting to new peers, when under the [ConnectionManager](https://github.com/libp2p/js-libp2p-connection-manager) low watermark (minimum peers).
+  * Applications can disable this via the `peerDiscovery.autoDial` config property, and handle connections themselves.
+  * Applications who have not disabled this should **never** connect on peer discovery. Applications should use the `peer:connect` event if they wish to take a specific action on new peers.
+
+## Scenarios
+In any scenario, if a peer is discovered it should be added to the PeerBook. This ensures that even if we don't dial to a node when we discover it, we know about it in the event that it becomes known as a provider for something we need. The scenarios listed below detail what actions the auto dialer will take when peers are discovered.
+
+### 1. Joining the network
+The node is new and needs to join the network. It currently has 0 peers.
+**Discovery Mechanisms**: [Ambient Discovery](#ambient-discovery)
+
+### Action to take
+Connect to discovered peers. This should have some degree of concurrency limiting. While the case should be low, if we immediately discover more peers than our high watermark we should avoid dialing them all.
+
+### 2. Connected to some
+The node is connected to other nodes. The current number of connections is less than the desired low watermark.
+**Discovery Mechanisms**: [Ambient Discovery](#ambient-discovery) and [Active Discovery](#active-discovery)
+
+### Action to take
+Connect to discovered peers. This should have some degree of concurrency limiting. The concurrency may need to be modified to reflect the current number of peers connected. The more peers we have, the lower the concurrency may need to be.
+
+### 3. Connected to enough
+**Discovery Mechanisms**: [Ambient Discovery](#ambient-discovery) and [Active Discovery](#active-discovery)
+
+### Action to take
+None. If we are connected to enough peers, the low watermark, we should not connect to discovered peers. As other peers discover us, they may connect to us based on their current scenario.
+
+For example, a long running node with adequate peers is on an MDNS network. A new peer joins the network and both become aware of each other. The new peer should be the peer that dials, as it has too few peers. The existing node has no reason to dial the new peer, but should keep a record of it in case it later becomes an important node due to its contents/capabilities.
+
+Avoiding dials above the low watermark also allows for a pool of connections to be reserved for application specific actions, such as connecting to a specific content provider via a DHT query to find that content (ipfs-bitswap).
+
+### 4. Connected to too many
+The node has more connections than it wants. The current number of connections is greater than the high watermark.
+
+[WIP Connection Manager v2 spec](https://github.com/libp2p/specs/pull/161)
+**Discovery Mechanisms**: [Ambient Discovery](#ambient-discovery) and [Active Discovery](#active-discovery)
+
+### Action to take
+None, the `ConnectionManager` will automatically prune connections.
+
+## Discovery Mechanisms
+Means of which a libp2p node discovers other peers.
+
+### Active Discovery
+Through active use of the libp2p network, a node may discovery peers.
+
+* Content/Peer routing (DHT, delegated, etc) provider and peer queries
+* DHT random walk
+* Rendezvous servers
+
+### Ambient Discovery
+Leveraging known addresses, or network discovery mechanisms, a node may discover peers outside of the bounds of the libp2p network.
+
+* Bootstrap
+* MDNS
+* proximity based (bluetooth, sound, etc)

README.md

@@ -8,12 +8,15 @@
   <a href="http://ipn.io"><img src="https://img.shields.io/badge/made%20by-Protocol%20Labs-blue.svg?style=flat-square" /></a>
   <a href="http://libp2p.io/"><img src="https://img.shields.io/badge/project-libp2p-yellow.svg?style=flat-square" /></a>
   <a href="http://webchat.freenode.net/?channels=%23libp2p"><img src="https://img.shields.io/badge/freenode-%23libp2p-yellow.svg?style=flat-square" /></a>
-  <a href="https://waffle.io/libp2p/libp2p"><img src="https://img.shields.io/badge/pm-waffle-yellow.svg?style=flat-square" /></a>
+  <a href="https://riot.permaweb.io/#/room/#libp2p:permaweb.io"><img src="https://img.shields.io/badge/matrix-%23libp2p%3Apermaweb.io-blue.svg?style=flat-square" /> </a>
+  <a href="https://discord.gg/66KBrm2"><img src="https://img.shields.io/discord/475789330380488707?color=blueviolet&label=discord&style=flat-square" /></a>
+  <a href="https://discuss.libp2p.io"><img src="https://img.shields.io/discourse/https/discuss.libp2p.io/posts.svg" /></a>
 </p>
 
 <p align="center">
-  <a href="https://ci.ipfs.team/job/libp2p/job/js-libp2p/job/master/"><img src="https://ci.ipfs.team/buildStatus/icon?job=libp2p/js-libp2p/master" /></a>
-  <a href="https://codecov.io/gh/libp2p/js-libp2p"><img src="https://codecov.io/gh/libp2p/js-libp2p/branch/master/graph/badge.svg"></a>
+  <a href="https://travis-ci.com/libp2p/js-libp2p"><img src="https://flat.badgen.net/travis/libp2p/js-libp2p" /></a>
+  <a href="https://codecov.io/gh/libp2p/js-libp2p"><img src="https://img.shields.io/codecov/c/github/ipfs/js-ipfs-multipart/master.svg?style=flat-square"></a>
+  <a href="https://bundlephobia.com/result?p=ipfsd-ctl"><img src="https://flat.badgen.net/bundlephobia/minzip/ipfsd-ctl"></a>
   <br>
   <a href="https://david-dm.org/libp2p/js-libp2p"><img src="https://david-dm.org/libp2p/js-libp2p.svg?style=flat-square" /></a>
   <a href="https://github.com/feross/standard"><img src="https://img.shields.io/badge/code%20style-standard-brightgreen.svg?style=flat-square"></a>
@@ -27,9 +30,7 @@
 
 We've come a long way, but this project is still in Alpha, lots of development is happening, API might change, beware of the Dragons 🐉..
 
-**Want to get started?** Check our [examples folder](/examples). You can check the development status at the [Waffle Board](https://waffle.io/libp2p/js-libp2p).
-
-[![Throughput Graph](https://graphs.waffle.io/libp2p/js-libp2p/throughput.svg)](https://waffle.io/libp2p/js-libp2p/metrics/throughput)
+**Want to get started?** Check our [examples folder](/examples).
 
 [**`Weekly Core Dev Calls`**](https://github.com/ipfs/pm/issues/650)
 
@@ -63,7 +64,9 @@ libp2p is the product of a long and arduous quest to understand the evolution of
 We are in the process of writing better documentation, blog posts, tutorials and a formal specification. Today you can find:
 
 - [libp2p.io](https://libp2p.io)
+- [docs.libp2p.io](https://docs.libp2p.io)
 - [Specification (WIP)](https://github.com/libp2p/specs)
+- [Discussion Forums](https://discuss.libp2p.io)
 - Talks
   - [`libp2p <3 ethereum` at DEVCON2](https://ethereumfoundation.org/devcon/?session=libp2p) [📼 video](https://www.youtube.com/watch?v=HxueJbeMVG4) [slides](https://ethereumfoundation.org/devcon/wp-content/uploads/2016/10/libp2p-HEART-devp2p-IPFS-PLUS-Ethereum-networking.pdf) [📼 demo-1](https://ethereumfoundation.org/devcon/wp-content/uploads/2016/10/libp2p_demo1-1.mp4) [📼 demo-2](https://ethereumfoundation.org/devcon/wp-content/uploads/2016/10/libp2p_demo2-1.mp4)
 - Articles
@@ -90,13 +93,15 @@ npm install --save libp2p
 
 ## Usage
 
+**IMPORTANT NOTE**: We are currently on the way of migrating all our `libp2p` modules to use `async await` and `async iterators`, instead of callbacks and `pull-streams`. As a consequence, when you start a new libp2p project, we must check which versions of the modules you should use. For now, it is required to use the modules using callbacks with `libp2p`, while we are working on getting the remaining modules ready for a full migration. For more details, you can have a look at [libp2p/js-libp2p#266](https://github.com/libp2p/js-libp2p/issues/266).
+
 ### [Tutorials and Examples](/examples)
 
 You can find multiple examples on the [examples folder](/examples) that will guide you through using libp2p for several scenarios.
 
 ### Creating your own libp2p bundle
 
-The libp2p module acts as a glue for every libp2p module that you can use top create your own libp2p bundle. Creating your own libp2p bundle gives you a lot of freedom when it comes to customize it with features and default setup. We recommend creating your own libp2p bundle for the app you are developing that takes in account your needs (e.g. for a browser working version of libp2p that acts as the network layer of IPFS, we have a built one that leverages the Browser transports).
+The libp2p module acts as a glue for every libp2p module that you can use to create your own libp2p bundle. Creating your own libp2p bundle gives you a lot of freedom when it comes to customize it with features and default setup. We recommend creating your own libp2p bundle for the app you are developing that takes in account your needs (e.g. for a browser working version of libp2p that acts as the network layer of IPFS, we have a built one that leverages the Browser transports).
 
 **Example:**
 
@@ -107,7 +112,7 @@ The libp2p module acts as a glue for every libp2p module that you can use top cr
 //   crypto-channel: secio
 //   discovery: multicast-dns
 
-const libp2p = require('libp2p')
+const Libp2p = require('libp2p')
 const TCP = require('libp2p-tcp')
 const WS = require('libp2p-websockets')
 const SPDY = require('libp2p-spdy')
@@ -115,12 +120,13 @@ const MPLEX = require('libp2p-mplex')
 const SECIO = require('libp2p-secio')
 const MulticastDNS = require('libp2p-mdns')
 const DHT = require('libp2p-kad-dht')
+const GossipSub = require('libp2p-gossipsub')
 const defaultsDeep = require('@nodeutils/defaults-deep')
 const Protector = require('libp2p-pnet')
 const DelegatedPeerRouter = require('libp2p-delegated-peer-routing')
 const DelegatedContentRouter = require('libp2p-delegated-content-routing')
 
-class Node extends libp2p {
+class Node extends Libp2p {
   constructor (_options) {
     const peerInfo = _options.peerInfo
     const defaults = {
@@ -150,12 +156,14 @@ class Node extends libp2p {
         peerDiscovery: [
           MulticastDNS
         ],
-        dht: DHT                      // DHT enables PeerRouting, ContentRouting and DHT itself components
+        dht: DHT,                      // DHT enables PeerRouting, ContentRouting and DHT itself components
+        pubsub: GossipSub
       },
 
       // libp2p config options (typically found on a config.json)
       config: {                       // The config object is the part of the config that can go into a file, config.json.
         peerDiscovery: {
+          autoDial: true,             // Auto connect to discovered peers (limited by ConnectionManager minPeers)
           mdns: {                     // mdns options
             interval: 1000,           // ms
             enabled: true
@@ -175,12 +183,18 @@ class Node extends libp2p {
         },
         dht: {
           kBucketSize: 20,
-          enabledDiscovery: true      // Allows to disable discovery (enabled by default)
+          enabled: true,
+          randomWalk: {
+            enabled: true,      // Allows to disable discovery (enabled by default)
+            interval: 300e3,
+            timeout: 10e3
+          }
         },
-        // Enable/Disable Experimental features
-        EXPERIMENTAL: {               // Experimental features ("behind a flag")
-          pubsub: false,
-          dht: false
+        pubsub: {
+          enabled: true,
+          emitSelf: true,      // whether the node should emit to self on publish, in the event of the topic being subscribed
+          signMessages: true,  // if messages should be signed
+          strictSigning: true  // if message signing should be required
         }
       }
     }
@@ -195,13 +209,33 @@ class Node extends libp2p {
 
 ### API
 
-#### Create a Node - `new libp2p.Node(options)`
+**IMPORTANT NOTE**: All the methods listed in the API section that take a callback are also now Promisified. Libp2p is migrating away from callbacks to async/await, and in a future release (that will be announced in advance), callback support will be removed entirely. You can follow progress of the async/await endeavor at https://github.com/ipfs/js-ipfs/issues/1670.
 
-> Creates an instance of the libp2p.Node.
+#### Create a Node - `Libp2p.createLibp2p(options, callback)`
+
+> Behaves exactly like `new Libp2p(options)`, but doesn't require a PeerInfo. One will be generated instead
+
+```js
+const { createLibp2p } = require('libp2p')
+createLibp2p(options, (err, libp2p) => {
+  if (err) throw err
+  libp2p.start((err) => {
+    if (err) throw err
+  })
+})
+```
+
+- `options`: Object of libp2p configuration options
+- `callback`: Function with signature `function (Error, Libp2p) {}`
+
+#### Create a Node alternative - `new Libp2p(options)`
+
+> Creates an instance of Libp2p with a custom `PeerInfo` provided via `options.peerInfo`.
 
 Required keys in the `options` object:
 
 - `peerInfo`: instance of [PeerInfo][] that contains the [PeerId][], Keys and [multiaddrs][multiaddr] of the libp2p Node.
+- `modules.transport`: An array that must include at least 1 transport, such as `libp2p-tcp`.
 
 #### `libp2p.start(callback)`
 
@@ -301,17 +335,32 @@ Required keys in the `options` object:
 
 > Peer has been discovered.
 
+If `autoDial` is `true`, applications should **not** attempt to connect to the peer
+unless they are performing a specific action. See [peer discovery and auto dial](./PEER_DISCOVERY.md) for more information.
+
 - `peer`: instance of [PeerInfo][]
 
 ##### `libp2p.on('peer:connect', (peer) => {})`
 
-> We connected to a new peer
+> We have a new muxed connection to a peer
 
 - `peer`: instance of [PeerInfo][]
 
 ##### `libp2p.on('peer:disconnect', (peer) => {})`
 
-> We disconnected from Peer
+> We have closed a connection to a peer
+
+- `peer`: instance of [PeerInfo][]
+
+##### `libp2p.on('connection:start', (peer) => {})`
+
+> We created a new connection to a peer
+
+- `peer`: instance of [PeerInfo][]
+
+##### `libp2p.on('connection:end', (peer) => {})`
+
+> We closed a connection to a peer
 
 - `peer`: instance of [PeerInfo][]
 
@@ -505,18 +554,6 @@ Some available network protectors:
 > npm run test:browser
 ```
 
-#### Run interop tests
-
-```sh
-N/A
-```
-
-#### Run benchmark tests
-
-```sh
-N/A
-```
-
 ### Packages
 
 List of packages currently in existence for libp2p
@@ -526,66 +563,49 @@ List of packages currently in existence for libp2p
 | Package | Version | Deps | CI | Coverage | Lead Maintainer |
 | ---------|---------|---------|---------|---------|--------- |
 | **Libp2p** |
-| [`interface-libp2p`](//github.com/libp2p/interface-libp2p) | [![npm](https://img.shields.io/npm/v/interface-libp2p.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/interface-libp2p/releases) | [![Deps](https://david-dm.org/libp2p/interface-libp2p.svg?style=flat-square)](https://david-dm.org/libp2p/interface-libp2p) | N/A | [![codecov](https://codecov.io/gh/libp2p/interface-libp2p/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/interface-libp2p) | N/A |
-| [`libp2p`](//github.com/libp2p/js-libp2p) | [![npm](https://img.shields.io/npm/v/libp2p.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p) | [![jenkins](https://ci.ipfs.team/buildStatus/icon?job=libp2p/js-libp2p/master)](https://ci.ipfs.team/job/libp2p/job/js-libp2p/job/master/) | [![codecov](https://codecov.io/gh/libp2p/js-libp2p/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p) | [Jacob Heun](mailto:jacobheun@gmail.com) |
+| [`interface-libp2p`](//github.com/libp2p/interface-libp2p) | [![npm](https://img.shields.io/npm/v/interface-libp2p.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/interface-libp2p/releases) | [![Deps](https://david-dm.org/libp2p/interface-libp2p.svg?style=flat-square)](https://david-dm.org/libp2p/interface-libp2p) | [![Travis CI](https://travis-ci.com/libp2p/interface-libp2p.svg?branch=master)](https://travis-ci.com/libp2p/interface-libp2p) | [![codecov](https://codecov.io/gh/libp2p/interface-libp2p/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/interface-libp2p) | N/A |
+| [`libp2p`](//github.com/libp2p/js-libp2p) | [![npm](https://img.shields.io/npm/v/libp2p.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p) | [![Travis CI](https://travis-ci.com/libp2p/js-libp2p.svg?branch=master)](https://travis-ci.com/libp2p/js-libp2p) | [![codecov](https://codecov.io/gh/libp2p/js-libp2p/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p) | [Jacob Heun](mailto:jacobheun@gmail.com) |
 | **Connection** |
-| [`interface-connection`](//github.com/libp2p/interface-connection) | [![npm](https://img.shields.io/npm/v/interface-connection.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/interface-connection/releases) | [![Deps](https://david-dm.org/libp2p/interface-connection.svg?style=flat-square)](https://david-dm.org/libp2p/interface-connection) | N/A | [![codecov](https://codecov.io/gh/libp2p/interface-connection/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/interface-connection) | N/A |
+| [`interface-connection`](//github.com/libp2p/interface-connection) | [![npm](https://img.shields.io/npm/v/interface-connection.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/interface-connection/releases) | [![Deps](https://david-dm.org/libp2p/interface-connection.svg?style=flat-square)](https://david-dm.org/libp2p/interface-connection) | [![Travis CI](https://travis-ci.com/libp2p/interface-connection.svg?branch=master)](https://travis-ci.com/libp2p/interface-connection) | [![codecov](https://codecov.io/gh/libp2p/interface-connection/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/interface-connection) | [Jacob Heun](mailto:jacobheun@gmail.com) |
 | **Transport** |
-| [`interface-transport`](//github.com/libp2p/interface-transport) | [![npm](https://img.shields.io/npm/v/interface-transport.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/interface-transport/releases) | [![Deps](https://david-dm.org/libp2p/interface-transport.svg?style=flat-square)](https://david-dm.org/libp2p/interface-transport) | N/A | [![codecov](https://codecov.io/gh/libp2p/interface-transport/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/interface-transport) | N/A |
-| [`libp2p-tcp`](//github.com/libp2p/js-libp2p-tcp) | [![npm](https://img.shields.io/npm/v/libp2p-tcp.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-tcp/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-tcp.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-tcp) | [![jenkins](https://ci.ipfs.team/buildStatus/icon?job=libp2p/js-libp2p-tcp/master)](https://ci.ipfs.team/job/libp2p/job/js-libp2p-tcp/job/master/) | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-tcp/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-tcp) | [Jacob Heun](mailto:jacobheun@gmail.com) |
-| [`libp2p-udp`](//github.com/libp2p/js-libp2p-udp) | [![npm](https://img.shields.io/npm/v/libp2p-udp.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-udp/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-udp.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-udp) | N/A | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-udp/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-udp) | N/A |
-| [`libp2p-udt`](//github.com/libp2p/js-libp2p-udt) | [![npm](https://img.shields.io/npm/v/libp2p-udt.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-udt/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-udt.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-udt) | N/A | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-udt/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-udt) | N/A |
-| [`libp2p-utp`](//github.com/libp2p/js-libp2p-utp) | [![npm](https://img.shields.io/npm/v/libp2p-utp.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-utp/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-utp.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-utp) | [![jenkins](https://ci.ipfs.team/buildStatus/icon?job=libp2p/js-libp2p-utp/master)](https://ci.ipfs.team/job/libp2p/job/js-libp2p-utp/job/master/) | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-utp/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-utp) | N/A |
-| [`libp2p-webrtc-direct`](//github.com/libp2p/js-libp2p-webrtc-direct) | [![npm](https://img.shields.io/npm/v/libp2p-webrtc-direct.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-webrtc-direct/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-webrtc-direct.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-webrtc-direct) | [![jenkins](https://ci.ipfs.team/buildStatus/icon?job=libp2p/js-libp2p-webrtc-direct/master)](https://ci.ipfs.team/job/libp2p/job/js-libp2p-webrtc-direct/job/master/) | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-webrtc-direct/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-webrtc-direct) | [Vasco Santos](mailto:vasco.santos@moxy.studio) |
-| [`libp2p-webrtc-star`](//github.com/libp2p/js-libp2p-webrtc-star) | [![npm](https://img.shields.io/npm/v/libp2p-webrtc-star.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-webrtc-star/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-webrtc-star.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-webrtc-star) | [![jenkins](https://ci.ipfs.team/buildStatus/icon?job=libp2p/js-libp2p-webrtc-star/master)](https://ci.ipfs.team/job/libp2p/job/js-libp2p-webrtc-star/job/master/) | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-webrtc-star/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-webrtc-star) | [Vasco Santos](mailto:vasco.santos@moxy.studio) |
-| [`libp2p-websockets`](//github.com/libp2p/js-libp2p-websockets) | [![npm](https://img.shields.io/npm/v/libp2p-websockets.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-websockets/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-websockets.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-websockets) | N/A | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-websockets/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-websockets) | N/A |
-| [`libp2p-websocket-star`](//github.com/libp2p/js-libp2p-websocket-star) | [![npm](https://img.shields.io/npm/v/libp2p-websocket-star.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-websocket-star/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-websocket-star.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-websocket-star) | N/A | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-websocket-star/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-websocket-star) | [Jacob Heun](mailto:jacobheun@gmail.com) |
-| [`libp2p-websocket-star-rendezvous`](//github.com/libp2p/js-libp2p-websocket-star-rendezvous) | [![npm](https://img.shields.io/npm/v/libp2p-websocket-star-rendezvous.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-websocket-star-rendezvous/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-websocket-star-rendezvous.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-websocket-star-rendezvous) | N/A | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-websocket-star-rendezvous/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-websocket-star-rendezvous) | N/A |
+| [`interface-transport`](//github.com/libp2p/interface-transport) | [![npm](https://img.shields.io/npm/v/interface-transport.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/interface-transport/releases) | [![Deps](https://david-dm.org/libp2p/interface-transport.svg?style=flat-square)](https://david-dm.org/libp2p/interface-transport) | [![Travis CI](https://travis-ci.com/libp2p/interface-transport.svg?branch=master)](https://travis-ci.com/libp2p/interface-transport) | [![codecov](https://codecov.io/gh/libp2p/interface-transport/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/interface-transport) | [Jacob Heun](mailto:jacobheun@gmail.com) |
+| [`libp2p-tcp`](//github.com/libp2p/js-libp2p-tcp) | [![npm](https://img.shields.io/npm/v/libp2p-tcp.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-tcp/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-tcp.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-tcp) | [![Travis CI](https://travis-ci.com/libp2p/js-libp2p-tcp.svg?branch=master)](https://travis-ci.com/libp2p/js-libp2p-tcp) | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-tcp/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-tcp) | [Jacob Heun](mailto:jacobheun@gmail.com) |
+| [`libp2p-utp`](//github.com/libp2p/js-libp2p-utp) | [![npm](https://img.shields.io/npm/v/libp2p-utp.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-utp/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-utp.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-utp) | [![Travis CI](https://travis-ci.com/libp2p/js-libp2p-utp.svg?branch=master)](https://travis-ci.com/libp2p/js-libp2p-utp) | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-utp/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-utp) | N/A |
+| [`libp2p-webrtc-direct`](//github.com/libp2p/js-libp2p-webrtc-direct) | [![npm](https://img.shields.io/npm/v/libp2p-webrtc-direct.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-webrtc-direct/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-webrtc-direct.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-webrtc-direct) | [![Travis CI](https://travis-ci.com/libp2p/js-libp2p-webrtc-direct.svg?branch=master)](https://travis-ci.com/libp2p/js-libp2p-webrtc-direct) | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-webrtc-direct/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-webrtc-direct) | [Vasco Santos](mailto:vasco.santos@moxy.studio) |
+| [`libp2p-webrtc-star`](//github.com/libp2p/js-libp2p-webrtc-star) | [![npm](https://img.shields.io/npm/v/libp2p-webrtc-star.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-webrtc-star/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-webrtc-star.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-webrtc-star) | [![Travis CI](https://travis-ci.com/libp2p/js-libp2p-webrtc-star.svg?branch=master)](https://travis-ci.com/libp2p/js-libp2p-webrtc-star) | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-webrtc-star/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-webrtc-star) | [Vasco Santos](mailto:vasco.santos@moxy.studio) |
+| [`libp2p-websockets`](//github.com/libp2p/js-libp2p-websockets) | [![npm](https://img.shields.io/npm/v/libp2p-websockets.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-websockets/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-websockets.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-websockets) | [![Travis CI](https://travis-ci.com/libp2p/js-libp2p-websockets.svg?branch=master)](https://travis-ci.com/libp2p/js-libp2p-websockets) | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-websockets/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-websockets) | [Jacob Heun](mailto:jacobheun@gmail.com) |
+| [`libp2p-websocket-star`](//github.com/libp2p/js-libp2p-websocket-star) | [![npm](https://img.shields.io/npm/v/libp2p-websocket-star.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-websocket-star/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-websocket-star.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-websocket-star) | [![Travis CI](https://travis-ci.com/libp2p/js-libp2p-websocket-star.svg?branch=master)](https://travis-ci.com/libp2p/js-libp2p-websocket-star) | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-websocket-star/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-websocket-star) | [Jacob Heun](mailto:jacobheun@gmail.com) |
 | **Crypto Channels** |
-| [`libp2p-secio`](//github.com/libp2p/js-libp2p-secio) | [![npm](https://img.shields.io/npm/v/libp2p-secio.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-secio/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-secio.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-secio) | N/A | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-secio/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-secio) | N/A |
+| [`libp2p-secio`](//github.com/libp2p/js-libp2p-secio) | [![npm](https://img.shields.io/npm/v/libp2p-secio.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-secio/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-secio.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-secio) | [![Travis CI](https://travis-ci.com/libp2p/js-libp2p-secio.svg?branch=master)](https://travis-ci.com/libp2p/js-libp2p-secio) | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-secio/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-secio) | [Friedel Ziegelmayer](mailto:dignifiedquire@gmail.com) |
 | **Stream Muxers** |
-| [`interface-stream-muxer`](//github.com/libp2p/interface-stream-muxer) | [![npm](https://img.shields.io/npm/v/interface-stream-muxer.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/interface-stream-muxer/releases) | [![Deps](https://david-dm.org/libp2p/interface-stream-muxer.svg?style=flat-square)](https://david-dm.org/libp2p/interface-stream-muxer) | N/A | [![codecov](https://codecov.io/gh/libp2p/interface-stream-muxer/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/interface-stream-muxer) | N/A |
-| [`libp2p-mplex`](//github.com/libp2p/js-libp2p-mplex) | [![npm](https://img.shields.io/npm/v/libp2p-mplex.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-mplex/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-mplex.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-mplex) | N/A | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-mplex/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-mplex) | [Vasco Santos](mailto:vasco.santos@moxy.studio) |
-| [`libp2p-spdy`](//github.com/libp2p/js-libp2p-spdy) | [![npm](https://img.shields.io/npm/v/libp2p-spdy.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-spdy/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-spdy.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-spdy) | [![jenkins](https://ci.ipfs.team/buildStatus/icon?job=libp2p/js-libp2p-spdy/master)](https://ci.ipfs.team/job/libp2p/job/js-libp2p-spdy/job/master/) | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-spdy/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-spdy) | N/A |
+| [`interface-stream-muxer`](//github.com/libp2p/interface-stream-muxer) | [![npm](https://img.shields.io/npm/v/interface-stream-muxer.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/interface-stream-muxer/releases) | [![Deps](https://david-dm.org/libp2p/interface-stream-muxer.svg?style=flat-square)](https://david-dm.org/libp2p/interface-stream-muxer) | [![Travis CI](https://travis-ci.com/libp2p/interface-stream-muxer.svg?branch=master)](https://travis-ci.com/libp2p/interface-stream-muxer) | [![codecov](https://codecov.io/gh/libp2p/interface-stream-muxer/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/interface-stream-muxer) | [Jacob Heun](mailto:jacobheun@gmail.com) |
+| [`libp2p-mplex`](//github.com/libp2p/js-libp2p-mplex) | [![npm](https://img.shields.io/npm/v/libp2p-mplex.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-mplex/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-mplex.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-mplex) | [![Travis CI](https://travis-ci.com/libp2p/js-libp2p-mplex.svg?branch=master)](https://travis-ci.com/libp2p/js-libp2p-mplex) | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-mplex/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-mplex) | [Vasco Santos](mailto:vasco.santos@moxy.studio) |
+| [`libp2p-spdy`](//github.com/libp2p/js-libp2p-spdy) | [![npm](https://img.shields.io/npm/v/libp2p-spdy.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-spdy/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-spdy.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-spdy) | [![Travis CI](https://travis-ci.com/libp2p/js-libp2p-spdy.svg?branch=master)](https://travis-ci.com/libp2p/js-libp2p-spdy) | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-spdy/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-spdy) | [Jacob Heun](mailto:jacobheun@gmail.com) |
 | **Discovery** |
-| [`interface-peer-discovery`](//github.com/libp2p/interface-peer-discovery) | [![npm](https://img.shields.io/npm/v/interface-peer-discovery.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/interface-peer-discovery/releases) | [![Deps](https://david-dm.org/libp2p/interface-peer-discovery.svg?style=flat-square)](https://david-dm.org/libp2p/interface-peer-discovery) | N/A | [![codecov](https://codecov.io/gh/libp2p/interface-peer-discovery/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/interface-peer-discovery) | N/A |
-| [`libp2p-bootstrap`](//github.com/libp2p/js-libp2p-bootstrap) | [![npm](https://img.shields.io/npm/v/libp2p-bootstrap.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-bootstrap/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-bootstrap.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-bootstrap) | [![jenkins](https://ci.ipfs.team/buildStatus/icon?job=libp2p/js-libp2p-bootstrap/master)](https://ci.ipfs.team/job/libp2p/job/js-libp2p-bootstrap/job/master/) | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-bootstrap/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-bootstrap) | [Vasco Santos](mailto:vasco.santos@moxy.studio) |
-| [`libp2p-kad-dht`](//github.com/libp2p/js-libp2p-kad-dht) | [![npm](https://img.shields.io/npm/v/libp2p-kad-dht.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-kad-dht/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-kad-dht.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-kad-dht) | [![jenkins](https://ci.ipfs.team/buildStatus/icon?job=libp2p/js-libp2p-kad-dht/master)](https://ci.ipfs.team/job/libp2p/job/js-libp2p-kad-dht/job/master/) | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-kad-dht/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-kad-dht) | [Vasco Santos](mailto:vasco.santos@moxy.studio) |
-| [`libp2p-mdns`](//github.com/libp2p/js-libp2p-mdns) | [![npm](https://img.shields.io/npm/v/libp2p-mdns.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-mdns/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-mdns.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-mdns) | [![jenkins](https://ci.ipfs.team/buildStatus/icon?job=libp2p/js-libp2p-mdns/master)](https://ci.ipfs.team/job/libp2p/job/js-libp2p-mdns/job/master/) | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-mdns/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-mdns) | N/A |
-| [`libp2p-rendezvous`](//github.com/libp2p/js-libp2p-rendezvous) | [![npm](https://img.shields.io/npm/v/libp2p-rendezvous.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-rendezvous/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-rendezvous.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-rendezvous) | N/A | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-rendezvous/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-rendezvous) | N/A |
-| [`libp2p-webrtc-star`](//github.com/libp2p/js-libp2p-webrtc-star) | [![npm](https://img.shields.io/npm/v/libp2p-webrtc-star.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-webrtc-star/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-webrtc-star.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-webrtc-star) | [![jenkins](https://ci.ipfs.team/buildStatus/icon?job=libp2p/js-libp2p-webrtc-star/master)](https://ci.ipfs.team/job/libp2p/job/js-libp2p-webrtc-star/job/master/) | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-webrtc-star/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-webrtc-star) | [Vasco Santos](mailto:vasco.santos@moxy.studio) |
-| [`libp2p-websocket-star`](//github.com/libp2p/js-libp2p-websocket-star) | [![npm](https://img.shields.io/npm/v/libp2p-websocket-star.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-websocket-star/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-websocket-star.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-websocket-star) | N/A | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-websocket-star/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-websocket-star) | [Jacob Heun](mailto:jacobheun@gmail.com) |
-| **NAT Traversal** |
-| [`libp2p-circuit`](//github.com/libp2p/js-libp2p-circuit) | [![npm](https://img.shields.io/npm/v/libp2p-circuit.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-circuit/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-circuit.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-circuit) | [![jenkins](https://ci.ipfs.team/buildStatus/icon?job=libp2p/js-libp2p-circuit/master)](https://ci.ipfs.team/job/libp2p/job/js-libp2p-circuit/job/master/) | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-circuit/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-circuit) | [Jacob Heun](mailto:jacobheun@gmail.com) |
-| [`libp2p-nat-mngr`](//github.com/libp2p/js-libp2p-nat-mngr) | [![npm](https://img.shields.io/npm/v/libp2p-nat-mngr.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-nat-mngr/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-nat-mngr.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-nat-mngr) | N/A | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-nat-mngr/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-nat-mngr) | N/A |
-| **Data Types** |
-| [`peer-book`](//github.com/libp2p/js-peer-book) | [![npm](https://img.shields.io/npm/v/peer-book.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-peer-book/releases) | [![Deps](https://david-dm.org/libp2p/js-peer-book.svg?style=flat-square)](https://david-dm.org/libp2p/js-peer-book) | N/A | [![codecov](https://codecov.io/gh/libp2p/js-peer-book/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-peer-book) | [Pedro Teixeira](mailto:i@pgte.me) |
-| [`peer-id`](//github.com/libp2p/js-peer-id) | [![npm](https://img.shields.io/npm/v/peer-id.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-peer-id/releases) | [![Deps](https://david-dm.org/libp2p/js-peer-id.svg?style=flat-square)](https://david-dm.org/libp2p/js-peer-id) | [![jenkins](https://ci.ipfs.team/buildStatus/icon?job=libp2p/js-peer-id/master)](https://ci.ipfs.team/job/libp2p/job/js-peer-id/job/master/) | [![codecov](https://codecov.io/gh/libp2p/js-peer-id/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-peer-id) | [Pedro Teixeira](mailto:i@pgte.me) |
-| [`peer-info`](//github.com/libp2p/js-peer-info) | [![npm](https://img.shields.io/npm/v/peer-info.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-peer-info/releases) | [![Deps](https://david-dm.org/libp2p/js-peer-info.svg?style=flat-square)](https://david-dm.org/libp2p/js-peer-info) | [![jenkins](https://ci.ipfs.team/buildStatus/icon?job=libp2p/js-peer-info/master)](https://ci.ipfs.team/job/libp2p/job/js-peer-info/job/master/) | [![codecov](https://codecov.io/gh/libp2p/js-peer-info/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-peer-info) | N/A |
+| [`interface-peer-discovery`](//github.com/libp2p/interface-peer-discovery) | [![npm](https://img.shields.io/npm/v/interface-peer-discovery.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/interface-peer-discovery/releases) | [![Deps](https://david-dm.org/libp2p/interface-peer-discovery.svg?style=flat-square)](https://david-dm.org/libp2p/interface-peer-discovery) | [![Travis CI](https://travis-ci.com/libp2p/interface-peer-discovery.svg?branch=master)](https://travis-ci.com/libp2p/interface-peer-discovery) | [![codecov](https://codecov.io/gh/libp2p/interface-peer-discovery/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/interface-peer-discovery) | N/A |
+| [`libp2p-bootstrap`](//github.com/libp2p/js-libp2p-bootstrap) | [![npm](https://img.shields.io/npm/v/libp2p-bootstrap.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-bootstrap/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-bootstrap.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-bootstrap) | [![Travis CI](https://travis-ci.com/libp2p/js-libp2p-bootstrap.svg?branch=master)](https://travis-ci.com/libp2p/js-libp2p-bootstrap) | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-bootstrap/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-bootstrap) | [Vasco Santos](mailto:vasco.santos@moxy.studio) |
+| [`libp2p-kad-dht`](//github.com/libp2p/js-libp2p-kad-dht) | [![npm](https://img.shields.io/npm/v/libp2p-kad-dht.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-kad-dht/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-kad-dht.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-kad-dht) | [![Travis CI](https://travis-ci.com/libp2p/js-libp2p-kad-dht.svg?branch=master)](https://travis-ci.com/libp2p/js-libp2p-kad-dht) | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-kad-dht/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-kad-dht) | [Vasco Santos](mailto:vasco.santos@moxy.studio) |
+| [`libp2p-mdns`](//github.com/libp2p/js-libp2p-mdns) | [![npm](https://img.shields.io/npm/v/libp2p-mdns.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-mdns/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-mdns.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-mdns) | [![Travis CI](https://travis-ci.com/libp2p/js-libp2p-mdns.svg?branch=master)](https://travis-ci.com/libp2p/js-libp2p-mdns) | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-mdns/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-mdns) | [Jacob Heun](mailto:jacobheun@gmail.com) |
+| [`libp2p-rendezvous`](//github.com/libp2p/js-libp2p-rendezvous) | [![npm](https://img.shields.io/npm/v/libp2p-rendezvous.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-rendezvous/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-rendezvous.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-rendezvous) | [![Travis CI](https://travis-ci.com/libp2p/js-libp2p-rendezvous.svg?branch=master)](https://travis-ci.com/libp2p/js-libp2p-rendezvous) | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-rendezvous/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-rendezvous) | N/A |
+| [`libp2p-webrtc-star`](//github.com/libp2p/js-libp2p-webrtc-star) | [![npm](https://img.shields.io/npm/v/libp2p-webrtc-star.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-webrtc-star/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-webrtc-star.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-webrtc-star) | [![Travis CI](https://travis-ci.com/libp2p/js-libp2p-webrtc-star.svg?branch=master)](https://travis-ci.com/libp2p/js-libp2p-webrtc-star) | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-webrtc-star/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-webrtc-star) | [Vasco Santos](mailto:vasco.santos@moxy.studio) |
+| [`libp2p-websocket-star`](//github.com/libp2p/js-libp2p-websocket-star) | [![npm](https://img.shields.io/npm/v/libp2p-websocket-star.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-websocket-star/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-websocket-star.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-websocket-star) | [![Travis CI](https://travis-ci.com/libp2p/js-libp2p-websocket-star.svg?branch=master)](https://travis-ci.com/libp2p/js-libp2p-websocket-star) | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-websocket-star/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-websocket-star) | [Jacob Heun](mailto:jacobheun@gmail.com) |
 | **Content Routing** |
-| [`interface-content-routing`](//github.com/libp2p/interface-content-routing) | [![npm](https://img.shields.io/npm/v/interface-content-routing.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/interface-content-routing/releases) | [![Deps](https://david-dm.org/libp2p/interface-content-routing.svg?style=flat-square)](https://david-dm.org/libp2p/interface-content-routing) | N/A | [![codecov](https://codecov.io/gh/libp2p/interface-content-routing/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/interface-content-routing) | N/A |
-| [`libp2p-delegated-content-routing`](//github.com/libp2p/js-libp2p-delegated-content-routing) | [![npm](https://img.shields.io/npm/v/libp2p-delegated-content-routing.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-delegated-content-routing/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-delegated-content-routing.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-delegated-content-routing) | N/A | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-delegated-content-routing/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-delegated-content-routing) | [Jacob Heun](mailto:jacobheun@gmail.com) |
-| [`libp2p-kad-dht`](//github.com/libp2p/js-libp2p-kad-dht) | [![npm](https://img.shields.io/npm/v/libp2p-kad-dht.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-kad-dht/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-kad-dht.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-kad-dht) | [![jenkins](https://ci.ipfs.team/buildStatus/icon?job=libp2p/js-libp2p-kad-dht/master)](https://ci.ipfs.team/job/libp2p/job/js-libp2p-kad-dht/job/master/) | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-kad-dht/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-kad-dht) | [Vasco Santos](mailto:vasco.santos@moxy.studio) |
+| [`interface-content-routing`](//github.com/libp2p/interface-content-routing) | [![npm](https://img.shields.io/npm/v/interface-content-routing.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/interface-content-routing/releases) | [![Deps](https://david-dm.org/libp2p/interface-content-routing.svg?style=flat-square)](https://david-dm.org/libp2p/interface-content-routing) | [![Travis CI](https://travis-ci.com/libp2p/interface-content-routing.svg?branch=master)](https://travis-ci.com/libp2p/interface-content-routing) | [![codecov](https://codecov.io/gh/libp2p/interface-content-routing/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/interface-content-routing) | N/A |
+| [`libp2p-delegated-content-routing`](//github.com/libp2p/js-libp2p-delegated-content-routing) | [![npm](https://img.shields.io/npm/v/libp2p-delegated-content-routing.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-delegated-content-routing/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-delegated-content-routing.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-delegated-content-routing) | [![Travis CI](https://travis-ci.com/libp2p/js-libp2p-delegated-content-routing.svg?branch=master)](https://travis-ci.com/libp2p/js-libp2p-delegated-content-routing) | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-delegated-content-routing/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-delegated-content-routing) | [Jacob Heun](mailto:jacobheun@gmail.com) |
+| [`libp2p-kad-dht`](//github.com/libp2p/js-libp2p-kad-dht) | [![npm](https://img.shields.io/npm/v/libp2p-kad-dht.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-kad-dht/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-kad-dht.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-kad-dht) | [![Travis CI](https://travis-ci.com/libp2p/js-libp2p-kad-dht.svg?branch=master)](https://travis-ci.com/libp2p/js-libp2p-kad-dht) | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-kad-dht/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-kad-dht) | [Vasco Santos](mailto:vasco.santos@moxy.studio) |
 | **Peer Routing** |
-| [`interface-peer-routing`](//github.com/libp2p/interface-peer-routing) | [![npm](https://img.shields.io/npm/v/interface-peer-routing.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/interface-peer-routing/releases) | [![Deps](https://david-dm.org/libp2p/interface-peer-routing.svg?style=flat-square)](https://david-dm.org/libp2p/interface-peer-routing) | N/A | [![codecov](https://codecov.io/gh/libp2p/interface-peer-routing/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/interface-peer-routing) | N/A |
-| [`libp2p-delegated-peer-routing`](//github.com/libp2p/js-libp2p-delegated-peer-routing) | [![npm](https://img.shields.io/npm/v/libp2p-delegated-peer-routing.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-delegated-peer-routing/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-delegated-peer-routing.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-delegated-peer-routing) | N/A | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-delegated-peer-routing/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-delegated-peer-routing) | [Jacob Heun](mailto:jacobheun@gmail.com) |
-| [`libp2p-kad-dht`](//github.com/libp2p/js-libp2p-kad-dht) | [![npm](https://img.shields.io/npm/v/libp2p-kad-dht.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-kad-dht/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-kad-dht.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-kad-dht) | [![jenkins](https://ci.ipfs.team/buildStatus/icon?job=libp2p/js-libp2p-kad-dht/master)](https://ci.ipfs.team/job/libp2p/job/js-libp2p-kad-dht/job/master/) | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-kad-dht/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-kad-dht) | [Vasco Santos](mailto:vasco.santos@moxy.studio) |
-| **Record Store** |
-| [`interface-record-store`](//github.com/libp2p/interface-record-store) | [![npm](https://img.shields.io/npm/v/interface-record-store.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/interface-record-store/releases) | [![Deps](https://david-dm.org/libp2p/interface-record-store.svg?style=flat-square)](https://david-dm.org/libp2p/interface-record-store) | N/A | [![codecov](https://codecov.io/gh/libp2p/interface-record-store/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/interface-record-store) | N/A |
-| [`libp2p-record`](//github.com/libp2p/js-libp2p-record) | [![npm](https://img.shields.io/npm/v/libp2p-record.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-record/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-record.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-record) | [![jenkins](https://ci.ipfs.team/buildStatus/icon?job=libp2p/js-libp2p-record/master)](https://ci.ipfs.team/job/libp2p/job/js-libp2p-record/job/master/) | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-record/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-record) | N/A |
-| **Generics** |
-| [`libp2p-connection-manager`](//github.com/libp2p/js-libp2p-connection-manager) | [![npm](https://img.shields.io/npm/v/libp2p-connection-manager.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-connection-manager/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-connection-manager.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-connection-manager) | N/A | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-connection-manager/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-connection-manager) | N/A |
-| [`libp2p-crypto`](//github.com/libp2p/js-libp2p-crypto) | [![npm](https://img.shields.io/npm/v/libp2p-crypto.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-crypto/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-crypto.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-crypto) | [![jenkins](https://ci.ipfs.team/buildStatus/icon?job=libp2p/js-libp2p-crypto/master)](https://ci.ipfs.team/job/libp2p/job/js-libp2p-crypto/job/master/) | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-crypto/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-crypto) | [Friedel Ziegelmayer](mailto:dignifiedquire@gmail.com) |
-| [`libp2p-crypto-secp256k1`](//github.com/libp2p/js-libp2p-crypto-secp256k1) | [![npm](https://img.shields.io/npm/v/libp2p-crypto-secp256k1.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-crypto-secp256k1/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-crypto-secp256k1.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-crypto-secp256k1) | [![jenkins](https://ci.ipfs.team/buildStatus/icon?job=libp2p/js-libp2p-crypto-secp256k1/master)](https://ci.ipfs.team/job/libp2p/job/js-libp2p-crypto-secp256k1/job/master/) | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-crypto-secp256k1/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-crypto-secp256k1) | N/A |
-| [`libp2p-switch`](//github.com/libp2p/js-libp2p-switch) | [![npm](https://img.shields.io/npm/v/libp2p-switch.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-switch/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-switch.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-switch) | [![jenkins](https://ci.ipfs.team/buildStatus/icon?job=libp2p/js-libp2p-switch/master)](https://ci.ipfs.team/job/libp2p/job/js-libp2p-switch/job/master/) | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-switch/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-switch) | [Jacob Heun](mailto:jacobheun@gmail.com) |
-| **Extensions** |
-| [`libp2p-floodsub`](//github.com/libp2p/js-libp2p-floodsub) | [![npm](https://img.shields.io/npm/v/libp2p-floodsub.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-floodsub/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-floodsub.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-floodsub) | N/A | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-floodsub/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-floodsub) | N/A |
-| [`libp2p-identify`](//github.com/libp2p/js-libp2p-identify) | [![npm](https://img.shields.io/npm/v/libp2p-identify.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-identify/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-identify.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-identify) | N/A | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-identify/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-identify) | [Jacob Heun](mailto:jacobheun@gmail.com) |
-| [`libp2p-keychain`](//github.com/libp2p/js-libp2p-keychain) | [![npm](https://img.shields.io/npm/v/libp2p-keychain.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-keychain/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-keychain.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-keychain) | N/A | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-keychain/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-keychain) | [Vasco Santos](mailto:vasco.santos@moxy.studio) |
-| [`libp2p-ping`](//github.com/libp2p/js-libp2p-ping) | [![npm](https://img.shields.io/npm/v/libp2p-ping.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-ping/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-ping.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-ping) | [![jenkins](https://ci.ipfs.team/buildStatus/icon?job=libp2p/js-libp2p-ping/master)](https://ci.ipfs.team/job/libp2p/job/js-libp2p-ping/job/master/) | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-ping/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-ping) | N/A |
-| [`libp2p-pnet`](//github.com/libp2p/js-libp2p-pnet) | [![npm](https://img.shields.io/npm/v/libp2p-pnet.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-pnet/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-pnet.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-pnet) | N/A | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-pnet/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-pnet) | [Jacob Heun](mailto:jacobheun@gmail.com) |
+| [`interface-peer-routing`](//github.com/libp2p/interface-peer-routing) | [![npm](https://img.shields.io/npm/v/interface-peer-routing.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/interface-peer-routing/releases) | [![Deps](https://david-dm.org/libp2p/interface-peer-routing.svg?style=flat-square)](https://david-dm.org/libp2p/interface-peer-routing) | [![Travis CI](https://travis-ci.com/libp2p/interface-peer-routing.svg?branch=master)](https://travis-ci.com/libp2p/interface-peer-routing) | [![codecov](https://codecov.io/gh/libp2p/interface-peer-routing/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/interface-peer-routing) | N/A |
+| [`libp2p-delegated-peer-routing`](//github.com/libp2p/js-libp2p-delegated-peer-routing) | [![npm](https://img.shields.io/npm/v/libp2p-delegated-peer-routing.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-delegated-peer-routing/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-delegated-peer-routing.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-delegated-peer-routing) | [![Travis CI](https://travis-ci.com/libp2p/js-libp2p-delegated-peer-routing.svg?branch=master)](https://travis-ci.com/libp2p/js-libp2p-delegated-peer-routing) | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-delegated-peer-routing/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-delegated-peer-routing) | [Jacob Heun](mailto:jacobheun@gmail.com) |
+| [`libp2p-kad-dht`](//github.com/libp2p/js-libp2p-kad-dht) | [![npm](https://img.shields.io/npm/v/libp2p-kad-dht.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-kad-dht/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-kad-dht.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-kad-dht) | [![Travis CI](https://travis-ci.com/libp2p/js-libp2p-kad-dht.svg?branch=master)](https://travis-ci.com/libp2p/js-libp2p-kad-dht) | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-kad-dht/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-kad-dht) | [Vasco Santos](mailto:vasco.santos@moxy.studio) |
 | **Utilities** |
-| [`p2pcat`](//github.com/libp2p/js-p2pcat) | [![npm](https://img.shields.io/npm/v/p2pcat.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-p2pcat/releases) | [![Deps](https://david-dm.org/libp2p/js-p2pcat.svg?style=flat-square)](https://david-dm.org/libp2p/js-p2pcat) | N/A | [![codecov](https://codecov.io/gh/libp2p/js-p2pcat/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-p2pcat) | N/A |
+| [`libp2p-crypto`](//github.com/libp2p/js-libp2p-crypto) | [![npm](https://img.shields.io/npm/v/libp2p-crypto.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-crypto/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-crypto.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-crypto) | [![Travis CI](https://travis-ci.com/libp2p/js-libp2p-crypto.svg?branch=master)](https://travis-ci.com/libp2p/js-libp2p-crypto) | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-crypto/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-crypto) | [Friedel Ziegelmayer](mailto:dignifiedquire@gmail.com) |
+| [`libp2p-crypto-secp256k1`](//github.com/libp2p/js-libp2p-crypto-secp256k1) | [![npm](https://img.shields.io/npm/v/libp2p-crypto-secp256k1.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-crypto-secp256k1/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-crypto-secp256k1.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-crypto-secp256k1) | [![Travis CI](https://travis-ci.com/libp2p/js-libp2p-crypto-secp256k1.svg?branch=master)](https://travis-ci.com/libp2p/js-libp2p-crypto-secp256k1) | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-crypto-secp256k1/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-crypto-secp256k1) | [Friedel Ziegelmayer](mailto:dignifiedquire@gmail.com) |
+| **Data Types** |
+| [`peer-book`](//github.com/libp2p/js-peer-book) | [![npm](https://img.shields.io/npm/v/peer-book.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-peer-book/releases) | [![Deps](https://david-dm.org/libp2p/js-peer-book.svg?style=flat-square)](https://david-dm.org/libp2p/js-peer-book) | [![Travis CI](https://travis-ci.com/libp2p/js-peer-book.svg?branch=master)](https://travis-ci.com/libp2p/js-peer-book) | [![codecov](https://codecov.io/gh/libp2p/js-peer-book/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-peer-book) | [Pedro Teixeira](mailto:i@pgte.me) |
+| [`peer-id`](//github.com/libp2p/js-peer-id) | [![npm](https://img.shields.io/npm/v/peer-id.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-peer-id/releases) | [![Deps](https://david-dm.org/libp2p/js-peer-id.svg?style=flat-square)](https://david-dm.org/libp2p/js-peer-id) | [![Travis CI](https://travis-ci.com/libp2p/js-peer-id.svg?branch=master)](https://travis-ci.com/libp2p/js-peer-id) | [![codecov](https://codecov.io/gh/libp2p/js-peer-id/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-peer-id) | [Pedro Teixeira](mailto:i@pgte.me) |
+| [`peer-info`](//github.com/libp2p/js-peer-info) | [![npm](https://img.shields.io/npm/v/peer-info.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-peer-info/releases) | [![Deps](https://david-dm.org/libp2p/js-peer-info.svg?style=flat-square)](https://david-dm.org/libp2p/js-peer-info) | [![Travis CI](https://travis-ci.com/libp2p/js-peer-info.svg?branch=master)](https://travis-ci.com/libp2p/js-peer-info) | [![codecov](https://codecov.io/gh/libp2p/js-peer-info/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-peer-info) | [Pedro Teixeira](mailto:i@pgte.me) |
+| **Extensions** |
+| [`libp2p-floodsub`](//github.com/libp2p/js-libp2p-floodsub) | [![npm](https://img.shields.io/npm/v/libp2p-floodsub.svg?maxAge=86400&style=flat-square)](//github.com/libp2p/js-libp2p-floodsub/releases) | [![Deps](https://david-dm.org/libp2p/js-libp2p-floodsub.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-floodsub) | [![Travis CI](https://travis-ci.com/libp2p/js-libp2p-floodsub.svg?branch=master)](https://travis-ci.com/libp2p/js-libp2p-floodsub) | [![codecov](https://codecov.io/gh/libp2p/js-libp2p-floodsub/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/js-libp2p-floodsub) | [Vasco Santos](mailto:vasco.santos@moxy.studio) |
 
 ## Contribute
 

RELEASE.md

@@ -13,6 +13,14 @@
 - Robustness and quality
   - [ ] Ensure that all tests are passing, this includes:
     - [ ] unit
+  - [ ] Publish a release candidate to npm
+    ```sh
+    # Minor prerelease (e.g. 0.24.1 -> 0.25.0-rc.0)
+    $ npx aegir release --type preminor -t node -t browser --preid rc --dist-tag next
+
+    # Increment prerelease (e.g. 0.25.0-rc.0 -> 0.25.0-rc.1)
+    $ npx aegir release --type prerelease -t node -t browser --preid rc --dist-tag next
+    ```
   - [ ] Run tests of the following projects with the new release:
     - [ ] [js-ipfs](https://github.com/ipfs/js-ipfs)
 - Documentation
@@ -20,22 +28,31 @@
   - [ ] Ensure that all the examples run
 - Communication
   - [ ] Create the release issue
+  - [ ] Take a snapshot between of everyone that has contributed to this release (including its subdeps in IPFS, libp2p, IPLD and multiformats) using [`name-your-contributors`](https://www.npmjs.com/package/name-your-contributors). Generate a nice markdown list with [this script](https://gist.github.com/jacobheun/d2ff479ca991733c13cdcf688a1317e5)
   - [ ] Announcements (both pre-release and post-release)
     - [ ] Twitter
     - [ ] IRC
     - [ ] Reddit
+    - [ ] [discuss.libp2p.io](https://discuss.libp2p.io/c/news)
   - [ ] Blog post
+  - [ ] Copy release notes to the [GitHub Release description](https://github.com/libp2p/js-libp2p/releases)
+
+# ❤️ Huge thank you to everyone that made this release possible
+
+In alphabetical order, here are all the humans that contributed to the release:
+
+- ...
 
 # 🙌🏽 Want to contribute?
 
 Would you like to contribute to the libp2p project and don't know how? Well, there are a few places you can get started:
 
-- Check the issues with the `help wanted` label at the Ready column in our waffle board - https://waffle.io/libp2p/js-libp2p?label=help%20wanted
-- Join an IPFS All Hands, introduce yourself and let us know where you would like to contribute - https://github.com/ipfs/pm/#all-hands-call
+- Check the issues with the `help wanted` label in the [libp2p repo](https://github.com/libp2p/js-libp2p/issues?q=is%3Aopen+is%3Aissue+label%3A%22help+wanted%22)
+- Join an IPFS All Hands, introduce yourself and let us know where you would like to contribute - https://github.com/ipfs/team-mgmt#all-hands-call
 - Hack with IPFS and show us what you made! The All Hands call is also the perfect venue for demos, join in and show us what you built
 - Join the discussion at http://discuss.ipfs.io/ and help users finding their answers.
-- Join the [⚡️ⒿⓈ Core Dev Team Weekly Sync 🙌🏽 ](https://github.com/ipfs/pm/issues/650) and be part of the Sprint action!
+- Join the [⚡️ⒿⓈ Core Dev Team Weekly Sync 🙌🏽 ](https://github.com/ipfs/team-mgmt/issues/650) and be part of the Sprint action!
 
 # ⁉️ Do you have questions?
 
-The best place to ask your questions about libp2p, how it works and what you can do with it is at [discuss.ipfs.io](http://discuss.ipfs.io). We are also available at the #libp2p channel on Freenode.
+The best place to ask your questions about libp2p, how it works and what you can do with it is at [discuss.libp2p.io](https://discuss.libp2p.io). We are also available at the #libp2p channel on Freenode.

ci/Jenkinsfile

@@ -1,2 +0,0 @@
-// Warning: This file is automatically synced from https://github.com/ipfs/ci-sync so if you want to change it, please change it there and ask someone to sync all repositories.
-javascript()

examples/chat/README.md

@@ -3,8 +3,8 @@
 This example creates a simple chat app in your terminal.
 
 ## Setup
-1. Install the modules, `npm install`.
-2. Open 2 terminal windows in the `./src` directory.
+1. Install the modules in the libp2p root directory, `npm install`.
+2. Open 2 terminal windows in the `./examples/chat/src` directory.
 
 ## Running
 1. Run the listener in window 1, `node listener.js`

examples/chat/src/dialer.js

@@ -46,7 +46,7 @@ async.parallel([
     console.log('Dialer ready, listening on:')
 
     peerListener.multiaddrs.forEach((ma) => {
-      console.log(ma.toString() + '/ipfs/' + idListener.toB58String())
+      console.log(ma.toString() + '/p2p/' + idListener.toB58String())
     })
 
     nodeDialer.dialProtocol(peerListener, '/chat/1.0.0', (err, conn) => {

examples/chat/src/listener.js

@@ -50,7 +50,7 @@ PeerId.createFromJSON(require('./peer-id-listener'), (err, idListener) => {
 
     console.log('Listener ready, listening on:')
     peerListener.multiaddrs.forEach((ma) => {
-      console.log(ma.toString() + '/ipfs/' + idListener.toB58String())
+      console.log(ma.toString() + '/p2p/' + idListener.toB58String())
     })
   })
 })

examples/delegated-routing/package.json

@@ -3,21 +3,27 @@
   "version": "0.1.0",
   "private": true,
   "dependencies": {
-    "ipfs": "~0.32.2",
-    "libp2p": "../../",
+    "ipfs": "~0.34.4",
+    "libp2p": "github:libp2p/js-libp2p#master",
     "libp2p-delegated-content-routing": "~0.2.2",
     "libp2p-delegated-peer-routing": "~0.2.2",
-    "libp2p-kad-dht": "~0.10.4",
-    "libp2p-mplex": "~0.8.0",
-    "libp2p-secio": "~0.10.0",
-    "libp2p-webrtc-star": "~0.15.5",
-    "libp2p-websocket-star": "~0.8.1",
-    "libp2p-websockets": "~0.12.0",
-    "react": "^16.5.2",
-    "react-dom": "^16.5.2",
-    "react-scripts": "1.1.5"
+    "libp2p-kad-dht": "~0.14.12",
+    "libp2p-mplex": "~0.8.5",
+    "libp2p-secio": "~0.11.1",
+    "libp2p-webrtc-star": "~0.15.8",
+    "libp2p-websocket-star": "~0.10.2",
+    "libp2p-websockets": "~0.12.2",
+    "react": "^16.8.6",
+    "react-dom": "^16.8.6",
+    "react-scripts": "2.1.8"
   },
   "scripts": {
     "start": "react-scripts start"
-  }
+  },
+  "browserslist": [
+    ">0.2%",
+    "not dead",
+    "not ie <= 11",
+    "not op_mini all"
+  ]
 }

examples/delegated-routing/src/App.js

@@ -1,13 +1,12 @@
 // eslint-disable-next-line
 'use strict'
 
-const React = require('react')
+import React from 'react'
+import Ipfs from 'ipfs'
+import libp2pBundle from './libp2p-bundle'
 const Component = React.Component
-const Ipfs = require('ipfs')
-const libp2pBundle = require('./libp2p-bundle')
-// require('./App.css')
 
-const BootstrapNode = '/ip4/127.0.0.1/tcp/8081/ws/ipfs/QmdoG8DpzYUZMVP5dGmgmigZwR1RE8Cf6SxMPg1SBXJAQ8'
+const BootstrapNode = '/ip4/127.0.0.1/tcp/8081/ws/p2p/QmdoG8DpzYUZMVP5dGmgmigZwR1RE8Cf6SxMPg1SBXJAQ8'
 
 class App extends Component {
   constructor (props) {
@@ -150,4 +149,4 @@ class App extends Component {
   }
 }
 
-module.exports = App
+export default App

examples/delegated-routing/src/index.js

@@ -1,9 +1,8 @@
 // eslint-disable-next-line
 'use strict'
 
-const React = require('react') // eslint-disable-line no-unused-vars
-const ReactDOM = require('react-dom')
-const App = require('./App') // eslint-disable-line no-unused-vars
-// require('index.css')
+import React from 'react' // eslint-disable-line no-unused-vars
+import ReactDOM from 'react-dom'
+import App from './App' // eslint-disable-line no-unused-vars
 
 ReactDOM.render(<App />, document.getElementById('root'))

examples/delegated-routing/src/libp2p-bundle.js

@@ -11,7 +11,7 @@ const KadDHT = require('libp2p-kad-dht')
 const DelegatedPeerRouter = require('libp2p-delegated-peer-routing')
 const DelegatedContentRouter = require('libp2p-delegated-content-routing')
 
-module.exports = ({peerInfo, peerBook}) => {
+export default function Libp2pBundle ({peerInfo, peerBook}) {
   const wrtcstar = new WebRTCStar({id: peerInfo.id})
   const wsstar = new WebSocketStar({id: peerInfo.id})
   const delegatedApiOptions = {
@@ -54,6 +54,7 @@ module.exports = ({peerInfo, peerBook}) => {
     },
     config: {
       peerDiscovery: {
+        autoDial: false,
         webrtcStar: {
           enabled: false
         },
@@ -62,16 +63,13 @@ module.exports = ({peerInfo, peerBook}) => {
         }
       },
       dht: {
-        kBucketSize: 20
+        enabled: false
       },
       relay: {
         enabled: true,
         hop: {
           enabled: false
         }
-      },
-      EXPERIMENTAL: {
-        dht: false
       }
     }
   })

examples/discovery-mechanisms/1.js

@@ -12,15 +12,15 @@ const defaultsDeep = require('@nodeutils/defaults-deep')
 
 // Find this list at: https://github.com/ipfs/js-ipfs/blob/master/src/core/runtime/config-nodejs.json
 const bootstrapers = [
-  '/ip4/104.131.131.82/tcp/4001/ipfs/QmaCpDMGvV2BGHeYERUEnRQAwe3N8SzbUtfsmvsqQLuvuJ',
-  '/ip4/104.236.176.52/tcp/4001/ipfs/QmSoLnSGccFuZQJzRadHn95W2CrSFmZuTdDWP8HXaHca9z',
-  '/ip4/104.236.179.241/tcp/4001/ipfs/QmSoLPppuBtQSGwKDZT2M73ULpjvfd3aZ6ha4oFGL1KrGM',
-  '/ip4/162.243.248.213/tcp/4001/ipfs/QmSoLueR4xBeUbY9WZ9xGUUxunbKWcrNFTDAadQJmocnWm',
-  '/ip4/128.199.219.111/tcp/4001/ipfs/QmSoLSafTMBsPKadTEgaXctDQVcqN88CNLHXMkTNwMKPnu',
-  '/ip4/104.236.76.40/tcp/4001/ipfs/QmSoLV4Bbm51jM9C4gDYZQ9Cy3U6aXMJDAbzgu2fzaDs64',
-  '/ip4/178.62.158.247/tcp/4001/ipfs/QmSoLer265NRgSp2LA3dPaeykiS1J6DifTC88f5uVQKNAd',
-  '/ip4/178.62.61.185/tcp/4001/ipfs/QmSoLMeWqB7YGVLJN3pNLQpmmEk35v6wYtsMGLzSr5QBU3',
-  '/ip4/104.236.151.122/tcp/4001/ipfs/QmSoLju6m7xTh3DuokvT3886QRYqxAzb1kShaanJgW36yx'
+  '/ip4/104.131.131.82/tcp/4001/p2p/QmaCpDMGvV2BGHeYERUEnRQAwe3N8SzbUtfsmvsqQLuvuJ',
+  '/ip4/104.236.176.52/tcp/4001/p2p/QmSoLnSGccFuZQJzRadHn95W2CrSFmZuTdDWP8HXaHca9z',
+  '/ip4/104.236.179.241/tcp/4001/p2p/QmSoLPppuBtQSGwKDZT2M73ULpjvfd3aZ6ha4oFGL1KrGM',
+  '/ip4/162.243.248.213/tcp/4001/p2p/QmSoLueR4xBeUbY9WZ9xGUUxunbKWcrNFTDAadQJmocnWm',
+  '/ip4/128.199.219.111/tcp/4001/p2p/QmSoLSafTMBsPKadTEgaXctDQVcqN88CNLHXMkTNwMKPnu',
+  '/ip4/104.236.76.40/tcp/4001/p2p/QmSoLV4Bbm51jM9C4gDYZQ9Cy3U6aXMJDAbzgu2fzaDs64',
+  '/ip4/178.62.158.247/tcp/4001/p2p/QmSoLer265NRgSp2LA3dPaeykiS1J6DifTC88f5uVQKNAd',
+  '/ip4/178.62.61.185/tcp/4001/p2p/QmSoLMeWqB7YGVLJN3pNLQpmmEk35v6wYtsMGLzSr5QBU3',
+  '/ip4/104.236.151.122/tcp/4001/p2p/QmSoLju6m7xTh3DuokvT3886QRYqxAzb1kShaanJgW36yx'
 ]
 
 class MyBundle extends libp2p {
@@ -34,8 +34,9 @@ class MyBundle extends libp2p {
       },
       config: {
         peerDiscovery: {
+          autoDial: true,
           bootstrap: {
-            interval: 2000,
+            interval: 20e3,
             enabled: true,
             list: bootstrapers
           }
@@ -62,8 +63,8 @@ waterfall([
   if (err) { throw err }
 
   node.on('peer:discovery', (peer) => {
+    // No need to dial, autoDial is on
     console.log('Discovered:', peer.id.toB58String())
-    node.dial(peer, () => {})
   })
 
   node.on('peer:connect', (peer) => {

examples/discovery-mechanisms/2.js

@@ -23,7 +23,7 @@ class MyBundle extends libp2p {
       config: {
         peerDiscovery: {
           mdns: {
-            interval: 1000,
+            interval: 20e3,
             enabled: true
           }
         }

examples/discovery-mechanisms/README.md

@@ -43,15 +43,15 @@ In this bundle, we use a `bootstrappers` array listing peers to connect _on boot
 
 ```JavaScript
 const bootstrapers = [
-  '/ip4/104.131.131.82/tcp/4001/ipfs/QmaCpDMGvV2BGHeYERUEnRQAwe3N8SzbUtfsmvsqQLuvuJ',
-  '/ip4/104.236.176.52/tcp/4001/ipfs/QmSoLnSGccFuZQJzRadHn95W2CrSFmZuTdDWP8HXaHca9z',
-  '/ip4/104.236.179.241/tcp/4001/ipfs/QmSoLPppuBtQSGwKDZT2M73ULpjvfd3aZ6ha4oFGL1KrGM',
-  '/ip4/162.243.248.213/tcp/4001/ipfs/QmSoLueR4xBeUbY9WZ9xGUUxunbKWcrNFTDAadQJmocnWm',
-  '/ip4/128.199.219.111/tcp/4001/ipfs/QmSoLSafTMBsPKadTEgaXctDQVcqN88CNLHXMkTNwMKPnu',
-  '/ip4/104.236.76.40/tcp/4001/ipfs/QmSoLV4Bbm51jM9C4gDYZQ9Cy3U6aXMJDAbzgu2fzaDs64',
-  '/ip4/178.62.158.247/tcp/4001/ipfs/QmSoLer265NRgSp2LA3dPaeykiS1J6DifTC88f5uVQKNAd',
-  '/ip4/178.62.61.185/tcp/4001/ipfs/QmSoLMeWqB7YGVLJN3pNLQpmmEk35v6wYtsMGLzSr5QBU3',
-  '/ip4/104.236.151.122/tcp/4001/ipfs/QmSoLju6m7xTh3DuokvT3886QRYqxAzb1kShaanJgW36yx'
+  '/ip4/104.131.131.82/tcp/4001/p2p/QmaCpDMGvV2BGHeYERUEnRQAwe3N8SzbUtfsmvsqQLuvuJ',
+  '/ip4/104.236.176.52/tcp/4001/p2p/QmSoLnSGccFuZQJzRadHn95W2CrSFmZuTdDWP8HXaHca9z',
+  '/ip4/104.236.179.241/tcp/4001/p2p/QmSoLPppuBtQSGwKDZT2M73ULpjvfd3aZ6ha4oFGL1KrGM',
+  '/ip4/162.243.248.213/tcp/4001/p2p/QmSoLueR4xBeUbY9WZ9xGUUxunbKWcrNFTDAadQJmocnWm',
+  '/ip4/128.199.219.111/tcp/4001/p2p/QmSoLSafTMBsPKadTEgaXctDQVcqN88CNLHXMkTNwMKPnu',
+  '/ip4/104.236.76.40/tcp/4001/p2p/QmSoLV4Bbm51jM9C4gDYZQ9Cy3U6aXMJDAbzgu2fzaDs64',
+  '/ip4/178.62.158.247/tcp/4001/p2p/QmSoLer265NRgSp2LA3dPaeykiS1J6DifTC88f5uVQKNAd',
+  '/ip4/178.62.61.185/tcp/4001/p2p/QmSoLMeWqB7YGVLJN3pNLQpmmEk35v6wYtsMGLzSr5QBU3',
+  '/ip4/104.236.151.122/tcp/4001/p2p/QmSoLju6m7xTh3DuokvT3886QRYqxAzb1kShaanJgW36yx'
 ]
 ```
 

examples/echo/README.md

@@ -3,7 +3,7 @@
 This example performs a simple echo from the listener to the dialer.
 
 ## Setup
-1. Install the modules, `npm install`.
+1. Install the modules from libp2p root, `npm install`.
 2. Open 2 terminal windows in the `./src` directory.
 
 ## Running

examples/echo/src/dialer.js

@@ -28,7 +28,7 @@ async.parallel([
   // Peer to Dial
   const listenerPeerInfo = new PeerInfo(ids[1])
   const listenerId = ids[1]
-  const listenerMultiaddr = '/ip4/127.0.0.1/tcp/10333/ipfs/' +
+  const listenerMultiaddr = '/ip4/127.0.0.1/tcp/10333/p2p/' +
       listenerId.toB58String()
   listenerPeerInfo.multiaddrs.add(listenerMultiaddr)
 
@@ -37,7 +37,7 @@ async.parallel([
 
     console.log('Dialer ready, listening on:')
     dialerPeerInfo.multiaddrs.forEach((ma) => console.log(ma.toString() +
-          '/ipfs/' + dialerId.toB58String()))
+          '/p2p/' + dialerId.toB58String()))
 
     console.log('Dialing to peer:', listenerMultiaddr.toString())
     dialerNode.dialProtocol(listenerPeerInfo, '/echo/1.0.0', (err, conn) => {

examples/echo/src/listener.js

@@ -41,6 +41,6 @@ series([
 
   console.log('Listener ready, listening on:')
   listenerNode.peerInfo.multiaddrs.forEach((ma) => {
-    console.log(ma.toString() + '/ipfs/' + listenerId.toB58String())
+    console.log(ma.toString() + '/p2p/' + listenerId.toB58String())
   })
 })

examples/libp2p-in-the-browser/1/package.json

@@ -17,13 +17,16 @@
   },
   "dependencies": {
     "detect-dom-ready": "^1.0.2",
-    "libp2p-bootstrap": "~0.9.3",
-    "libp2p-mplex": "~0.8.0",
-    "libp2p-secio": "~0.10.0",
-    "libp2p-spdy": "~0.12.1",
-    "libp2p-webrtc-star": "~0.15.3",
-    "libp2p-websocket-star": "~0.8.1",
-    "libp2p-websockets": "~0.12.0",
-    "peer-info": "~0.14.1"
+    "libp2p": "../../../",
+    "libp2p-bootstrap": "~0.9.7",
+    "libp2p-gossipsub": "~0.0.4",
+    "libp2p-kad-dht": "^0.15.3",
+    "libp2p-mplex": "~0.8.5",
+    "libp2p-secio": "~0.11.1",
+    "libp2p-spdy": "~0.13.3",
+    "libp2p-webrtc-star": "~0.15.8",
+    "libp2p-websocket-star": "~0.10.2",
+    "libp2p-websockets": "~0.12.2",
+    "peer-info": "~0.15.1"
   }
 }

examples/libp2p-in-the-browser/1/src/browser-bundle.js

@@ -7,27 +7,28 @@ const Mplex = require('libp2p-mplex')
 const SPDY = require('libp2p-spdy')
 const SECIO = require('libp2p-secio')
 const Bootstrap = require('libp2p-bootstrap')
-const defaultsDeep = require('@nodeutils/defaults-deep')
-const libp2p = require('../../../../')
+const DHT = require('libp2p-kad-dht')
+const Gossipsub = require('libp2p-gossipsub')
+const libp2p = require('libp2p')
 
 // Find this list at: https://github.com/ipfs/js-ipfs/blob/master/src/core/runtime/config-browser.json
 const bootstrapList = [
-  '/dns4/ams-1.bootstrap.libp2p.io/tcp/443/wss/ipfs/QmSoLer265NRgSp2LA3dPaeykiS1J6DifTC88f5uVQKNAd',
-  '/dns4/sfo-1.bootstrap.libp2p.io/tcp/443/wss/ipfs/QmSoLju6m7xTh3DuokvT3886QRYqxAzb1kShaanJgW36yx',
-  '/dns4/lon-1.bootstrap.libp2p.io/tcp/443/wss/ipfs/QmSoLMeWqB7YGVLJN3pNLQpmmEk35v6wYtsMGLzSr5QBU3',
-  '/dns4/sfo-2.bootstrap.libp2p.io/tcp/443/wss/ipfs/QmSoLnSGccFuZQJzRadHn95W2CrSFmZuTdDWP8HXaHca9z',
-  '/dns4/sfo-3.bootstrap.libp2p.io/tcp/443/wss/ipfs/QmSoLPppuBtQSGwKDZT2M73ULpjvfd3aZ6ha4oFGL1KrGM',
-  '/dns4/sgp-1.bootstrap.libp2p.io/tcp/443/wss/ipfs/QmSoLSafTMBsPKadTEgaXctDQVcqN88CNLHXMkTNwMKPnu',
-  '/dns4/nyc-1.bootstrap.libp2p.io/tcp/443/wss/ipfs/QmSoLueR4xBeUbY9WZ9xGUUxunbKWcrNFTDAadQJmocnWm',
-  '/dns4/nyc-2.bootstrap.libp2p.io/tcp/443/wss/ipfs/QmSoLV4Bbm51jM9C4gDYZQ9Cy3U6aXMJDAbzgu2fzaDs64',
-  '/dns4/node0.preload.ipfs.io/tcp/443/wss/ipfs/QmZMxNdpMkewiVZLMRxaNxUeZpDUb34pWjZ1kZvsd16Zic',
-  '/dns4/node0.preload.ipfs.io/tcp/443/wss/ipfs/Qmbut9Ywz9YEDrz8ySBSgWyJk41Uvm2QJPhwDJzJyGFsD6'
+  '/dns4/ams-1.bootstrap.libp2p.io/tcp/443/wss/p2p/QmSoLer265NRgSp2LA3dPaeykiS1J6DifTC88f5uVQKNAd',
+  '/dns4/sfo-1.bootstrap.libp2p.io/tcp/443/wss/p2p/QmSoLju6m7xTh3DuokvT3886QRYqxAzb1kShaanJgW36yx',
+  '/dns4/lon-1.bootstrap.libp2p.io/tcp/443/wss/p2p/QmSoLMeWqB7YGVLJN3pNLQpmmEk35v6wYtsMGLzSr5QBU3',
+  '/dns4/sfo-2.bootstrap.libp2p.io/tcp/443/wss/p2p/QmSoLnSGccFuZQJzRadHn95W2CrSFmZuTdDWP8HXaHca9z',
+  '/dns4/sfo-3.bootstrap.libp2p.io/tcp/443/wss/p2p/QmSoLPppuBtQSGwKDZT2M73ULpjvfd3aZ6ha4oFGL1KrGM',
+  '/dns4/sgp-1.bootstrap.libp2p.io/tcp/443/wss/p2p/QmSoLSafTMBsPKadTEgaXctDQVcqN88CNLHXMkTNwMKPnu',
+  '/dns4/nyc-1.bootstrap.libp2p.io/tcp/443/wss/p2p/QmSoLueR4xBeUbY9WZ9xGUUxunbKWcrNFTDAadQJmocnWm',
+  '/dns4/nyc-2.bootstrap.libp2p.io/tcp/443/wss/p2p/QmSoLV4Bbm51jM9C4gDYZQ9Cy3U6aXMJDAbzgu2fzaDs64',
+  '/dns4/node0.preload.ipfs.io/tcp/443/wss/p2p/QmZMxNdpMkewiVZLMRxaNxUeZpDUb34pWjZ1kZvsd16Zic',
+  '/dns4/node0.preload.ipfs.io/tcp/443/wss/p2p/Qmbut9Ywz9YEDrz8ySBSgWyJk41Uvm2QJPhwDJzJyGFsD6'
 ]
 
 class Node extends libp2p {
-  constructor (_options) {
-    const wrtcStar = new WebRTCStar({ id: _options.peerInfo.id })
-    const wsstar = new WebSocketStar({ id: _options.peerInfo.id })
+  constructor ({ peerInfo }) {
+    const wrtcStar = new WebRTCStar({ id: peerInfo.id })
+    const wsstar = new WebSocketStar({ id: peerInfo.id })
 
     const defaults = {
       modules: {
@@ -47,10 +48,13 @@ class Node extends libp2p {
           wrtcStar.discovery,
           wsstar.discovery,
           Bootstrap
-        ]
+        ],
+        dht: DHT,
+        pubsub: Gossipsub
       },
       config: {
         peerDiscovery: {
+          autoDial: true,
           webRTCStar: {
             enabled: true
           },
@@ -58,7 +62,7 @@ class Node extends libp2p {
             enabled: true
           },
           bootstrap: {
-            interval: 10000,
+            interval: 20e3,
             enabled: true,
             list: bootstrapList
           }
@@ -66,21 +70,24 @@ class Node extends libp2p {
         relay: {
           enabled: true,
           hop: {
-            enabled: true,
+            enabled: false,
             active: false
           }
         },
-        EXPERIMENTAL: {
-          dht: false,
-          pubsub: false
+        dht: {
+          enabled: false
+        },
+        pubsub: {
+          enabled: false
         }
       },
       connectionManager: {
+        minPeers: 10,
         maxPeers: 50
       }
     }
 
-    super(defaultsDeep(_options, defaults))
+    super({ ...defaults, peerInfo })
   }
 }
 

examples/libp2p-in-the-browser/1/src/create-node.js

@@ -10,9 +10,11 @@ function createNode (callback) {
     }
 
     const peerIdStr = peerInfo.id.toB58String()
-    const ma = `/dns4/star-signal.cloud.ipfs.team/tcp/443/wss/p2p-webrtc-star/ipfs/${peerIdStr}`
+    const webrtcAddr = `/dns4/star-signal.cloud.ipfs.team/tcp/443/wss/p2p-webrtc-star/p2p/${peerIdStr}`
+    const wsAddr = `/dns4/ws-star.discovery.libp2p.io/tcp/443/wss/p2p-websocket-star`
 
-    peerInfo.multiaddrs.add(ma)
+    peerInfo.multiaddrs.add(webrtcAddr)
+    peerInfo.multiaddrs.add(wsAddr)
 
     const node = new Node({
       peerInfo

examples/libp2p-in-the-browser/1/src/index.js

@@ -14,26 +14,8 @@ domReady(() => {
       return console.log('Could not create the Node, check if your browser has WebRTC Support', err)
     }
 
-    let connections = {}
-
     node.on('peer:discovery', (peerInfo) => {
-      const idStr = peerInfo.id.toB58String()
-      if (connections[idStr]) {
-        // If we're already trying to connect to this peer, dont dial again
-        return
-      }
-      console.log('Discovered a peer:', idStr)
-
-      connections[idStr] = true
-      node.dial(peerInfo, (err, conn) => {
-        if (err) {
-          // Prevent immediate connection retries from happening
-          // and include a 10s jitter
-          const timeToNextDial = 25 * 1000 + (Math.random(0) * 10000).toFixed(0)
-          console.log('Failed to dial:', idStr)
-          setTimeout(() => delete connections[idStr], timeToNextDial)
-        }
-      })
+      console.log('Discovered a peer:', peerInfo.id.toB58String())
     })
 
     node.on('peer:connect', (peerInfo) => {
@@ -47,15 +29,13 @@ domReady(() => {
 
     node.on('peer:disconnect', (peerInfo) => {
       const idStr = peerInfo.id.toB58String()
-      delete connections[idStr]
-      console.log('Lost connection to: ' + idStr)
       const el = document.getElementById(idStr)
       el && el.remove()
     })
 
     node.start((err) => {
       if (err) {
-        return console.log('WebRTC not supported')
+        return console.log(err)
       }
 
       const idStr = node.peerInfo.id.toB58String()
@@ -66,6 +46,9 @@ domReady(() => {
       myPeerDiv.append(idDiv)
 
       console.log('Node is listening o/')
+      node.peerInfo.multiaddrs.toArray().forEach(ma => {
+        console.log(ma.toString())
+      })
 
       // NOTE: to stop the node
       // node.stop((err) => {})

examples/libp2p-in-the-browser/README.md

@@ -4,7 +4,15 @@ One of the primary goals with libp2p P2P was to get it fully working in the brow
 
 # 1. Setting up a simple app that lists connections to other nodes
 
-Simple go into the folder [1](./1) and execute the following
+Start by installing libp2p's dependencies.
+
+```bash
+> cd ../../
+> npm install
+> cd examples/libp2p-in-the-browser
+```
+
+Then simply go into the folder [1](./1) and execute the following
 
 ```bash
 > cd 1
@@ -12,5 +20,3 @@ Simple go into the folder [1](./1) and execute the following
 > npm start
 # open your browser in port :9090
 ```
-
-[Version Published on IPFS](http://ipfs.io/ipfs/Qmbc1J7ehw1dNYachbkCWPto4RsnVvqCKNVzmYEod2gXcy)

examples/peer-and-content-routing/1.js

@@ -23,10 +23,8 @@ class MyBundle extends libp2p {
       },
       config: {
         dht: {
+          enabled: true,
           kBucketSize: 20
-        },
-        EXPERIMENTAL: {
-          dht: true
         }
       }
     }

examples/peer-and-content-routing/2.js

@@ -24,10 +24,8 @@ class MyBundle extends libp2p {
       },
       config: {
         dht: {
+          enabled: true,
           kBucketSize: 20
-        },
-        EXPERIMENTAL: {
-          dht: true
         }
       }
     }

examples/peer-and-content-routing/README.md

@@ -25,11 +25,9 @@ class MyBundle extends libp2p {
       },
       config: {
         dht: {
-          kBucketSize: 20
-        },
-        EXPERIMENTAL: {
           // dht must be enabled
-          dht: true
+          enabled: true,
+          kBucketSize: 20
         }
       }
     }
@@ -69,8 +67,8 @@ You should see the output being something like:
 ```Bash
 > node 1.js
 Found it, multiaddrs are:
-/ip4/127.0.0.1/tcp/63617/ipfs/QmWrFXvZr9S4iDqycyoyc2zDdrT1jg9wpdenUTdd1LTar6
-/ip4/192.168.86.41/tcp/63617/ipfs/QmWrFXvZr9S4iDqycyoyc2zDdrT1jg9wpdenUTdd1LTar6
+/ip4/127.0.0.1/tcp/63617/p2p/QmWrFXvZr9S4iDqycyoyc2zDdrT1jg9wpdenUTdd1LTar6
+/ip4/192.168.86.41/tcp/63617/p2p/QmWrFXvZr9S4iDqycyoyc2zDdrT1jg9wpdenUTdd1LTar6
 ```
 
 You have successfully used Peer Routing to find a peer that you were not directly connected. Now all you have to do is to dial to the multiaddrs you discovered.

examples/pnet-ipfs/.gitignore

@@ -0,0 +1 @@
+tmp/

examples/pnet-ipfs/README.md

@@ -0,0 +1,29 @@
+# Private Networking with IPFS
+This example shows how to set up a private network of IPFS nodes.
+
+## Setup
+Install dependencies:
+
+```
+npm install
+```
+
+## Run
+Running the example will cause two nodes with the same swarm key to be started and exchange basic information.
+
+```
+node index.js
+```
+
+### Using different keys
+This example includes `TASK` comments that can be used to try the example with different swarm keys. This will
+allow you to see how nodes will fail to connect if they are on different private networks and try to connect to
+one another.
+
+To change the swarm key of one of the nodes, look through `index.js` for comments starting with `TASK` to indicate
+where lines are that pertain to changing the swarm key of node 2.
+
+### Exploring the repos
+Once you've run the example you can take a look at the repos in the `./tmp` directory to see how they differ, including
+the swarm keys. You should see a `swarm.key` file in each of the repos and when the nodes are on the same private network
+this contents of the `swarm.key` files should be the same.

examples/pnet-ipfs/index.js

@@ -0,0 +1,145 @@
+/* eslint no-console: ["off"] */
+'use strict'
+
+const IPFS = require('ipfs')
+const assert = require('assert').strict
+const writeKey = require('libp2p-pnet').generate
+const path = require('path')
+const fs = require('fs')
+const privateLibp2pBundle = require('./libp2p-bundle')
+const { mkdirp } = require('./utils')
+
+// Create two separate repo paths so we can run two nodes and check their output
+const repo1 = path.resolve('./tmp', 'repo1', '.ipfs')
+const repo2 = path.resolve('./tmp', 'repo2', '.ipfs')
+mkdirp(repo1)
+mkdirp(repo2)
+
+// Create a buffer and write the swarm key to it
+const swarmKey = Buffer.alloc(95)
+writeKey(swarmKey)
+
+// This key is for the `TASK` mentioned in the writeFileSync calls below
+const otherSwarmKey = Buffer.alloc(95)
+writeKey(otherSwarmKey)
+
+// Add the swarm key to both repos
+const swarmKey1Path = path.resolve(repo1, 'swarm.key')
+const swarmKey2Path = path.resolve(repo2, 'swarm.key')
+fs.writeFileSync(swarmKey1Path, swarmKey)
+// TASK: switch the commented out line below so we're using a different key, to see the nodes fail to connect
+fs.writeFileSync(swarmKey2Path, swarmKey)
+// fs.writeFileSync(swarmKey2Path, otherSwarmKey)
+
+// Create the first ipfs node
+const node1 = new IPFS({
+  repo: repo1,
+  libp2p: privateLibp2pBundle(swarmKey1Path),
+  config: {
+    Addresses: {
+      // Set the swarm address so we dont get port collision on the nodes
+      Swarm: ['/ip4/0.0.0.0/tcp/9101']
+    }
+  }
+})
+
+// Create the second ipfs node
+const node2 = new IPFS({
+  repo: repo2,
+  libp2p: privateLibp2pBundle(swarmKey2Path),
+  config: {
+    Addresses: {
+      // Set the swarm address so we dont get port collision on the nodes
+      Swarm: ['/ip4/0.0.0.0/tcp/9102']
+    }
+  }
+})
+
+console.log('auto starting the nodes...')
+
+// `nodesStarted` keeps track of how many of our nodes have started
+let nodesStarted = 0
+/**
+ * Calls `connectAndTalk` when both nodes have started
+ * @returns {void}
+ */
+const didStartHandler = () => {
+  if (++nodesStarted === 2) {
+    // If both nodes are up, start talking
+    connectAndTalk()
+  }
+}
+
+/**
+ * Exits the process when all started nodes have stopped
+ * @returns {void}
+ */
+const didStopHandler = () => {
+  if (--nodesStarted < 1) {
+    console.log('all nodes stopped, exiting.')
+    process.exit(0)
+  }
+}
+
+/**
+ * Stops the running nodes
+ * @param {Error} err An optional error to log to the console
+ * @returns {void}
+ */
+const doStop = (err) => {
+  if (err) {
+    console.error(err)
+  }
+
+  console.log('Shutting down...')
+  node1.stop()
+  node2.stop()
+}
+
+/**
+ * Connects the IPFS nodes and transfers data between them
+ * @returns {void}
+ */
+const connectAndTalk = async () => {
+  console.log('connecting the nodes...')
+  const node2Id = await node2.id()
+  const dataToAdd = Buffer.from('Hello, private friend!')
+
+  // Connect the nodes
+  // This will error when different private keys are used
+  try {
+    await node1.swarm.connect(node2Id.addresses[0])
+  } catch (err) {
+    return doStop(err)
+  }
+  console.log('the nodes are connected, let\'s add some data')
+
+  // Add some data to node 1
+  let addedCID
+  try {
+    addedCID = await node1.files.add(dataToAdd)
+  } catch (err) {
+    return doStop(err)
+  }
+  console.log(`added ${addedCID[0].path} to the node1`)
+
+  // Retrieve the data from node 2
+  let cattedData
+  try {
+    cattedData = await node2.files.cat(addedCID[0].path)
+  } catch (err) {
+    return doStop(err)
+  }
+  assert.deepEqual(cattedData.toString(), dataToAdd.toString(), 'Should have equal data')
+  console.log(`successfully retrieved "${dataToAdd.toString()}" from node2`)
+
+  doStop()
+}
+
+// Wait for the nodes to boot
+node1.once('start', didStartHandler)
+node2.once('start', didStartHandler)
+
+// Listen for the nodes stopping so we can cleanup
+node1.once('stop', didStopHandler)
+node2.once('stop', didStopHandler)

examples/pnet-ipfs/libp2p-bundle.js

@@ -0,0 +1,60 @@
+'use strict'
+
+const Libp2p = require('libp2p')
+const TCP = require('libp2p-tcp')
+const MPLEX = require('libp2p-mplex')
+const SECIO = require('libp2p-secio')
+const fs = require('fs')
+const Protector = require('libp2p-pnet')
+
+/**
+ * Options for the libp2p bundle
+ * @typedef {Object} libp2pBundle~options
+ * @property {PeerInfo} peerInfo - The PeerInfo of the IPFS node
+ * @property {PeerBook} peerBook - The PeerBook of the IPFS node
+ * @property {Object} config - The config of the IPFS node
+ * @property {Object} options - The options given to the IPFS node
+ */
+
+/**
+ * privateLibp2pBundle returns a libp2p bundle function that will use the swarm
+ * key at the given `swarmKeyPath` to create the Protector
+ *
+ * @param {string} swarmKeyPath The path to our swarm key
+ * @returns {libp2pBundle} Returns a libp2pBundle function for use in IPFS creation
+ */
+const privateLibp2pBundle = (swarmKeyPath) => {
+  /**
+   * This is the bundle we will use to create our fully customized libp2p bundle.
+   *
+   * @param {libp2pBundle~options} opts The options to use when generating the libp2p node
+   * @returns {Libp2p} Our new libp2p node
+   */
+  const libp2pBundle = (opts) => {
+    // Set convenience variables to clearly showcase some of the useful things that are available
+    const peerInfo = opts.peerInfo
+    const peerBook = opts.peerBook
+
+    // Build and return our libp2p node
+    return new Libp2p({
+      peerInfo,
+      peerBook,
+      modules: {
+        transport: [TCP], // We're only using the TCP transport for this example
+        streamMuxer: [MPLEX], // We're only using mplex muxing
+        // Let's make sure to use identifying crypto in our pnet since the protector doesn't
+        // care about node identity, and only the presence of private keys
+        connEncryption: [SECIO],
+        // Leave peer discovery empty, we don't want to find peers. We could omit the property, but it's
+        // being left in for explicit readability.
+        // We should explicitly dial pnet peers, or use a custom discovery service for finding nodes in our pnet
+        peerDiscovery: [],
+        connProtector: new Protector(fs.readFileSync(swarmKeyPath))
+      }
+    })
+  }
+
+  return libp2pBundle
+}
+
+module.exports = privateLibp2pBundle

examples/pnet-ipfs/package.json

@@ -0,0 +1,21 @@
+{
+  "name": "pnet-ipfs-example",
+  "version": "1.0.0",
+  "description": "An example of private networking with IPFS",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "start": "node index.js"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "ipfs": "~0.32.3",
+    "libp2p": "~0.23.1",
+    "libp2p-mplex": "~0.8.2",
+    "libp2p-pnet": "../../",
+    "libp2p-secio": "~0.10.0",
+    "libp2p-tcp": "~0.13.0"
+  }
+}

examples/pnet-ipfs/utils.js

@@ -0,0 +1,28 @@
+'use strict'
+const fs = require('fs')
+const path = require('path')
+
+/**
+ * mkdirp recursively creates needed folders for the given dir path
+ * @param {string} dir
+ * @returns {string} The path that was created
+ */
+module.exports.mkdirp = (dir) => {
+  return path
+    .resolve(dir)
+    .split(path.sep)
+    .reduce((acc, cur) => {
+      const currentPath = path.normalize(acc + path.sep + cur)
+
+      try {
+        fs.statSync(currentPath)
+      } catch (e) {
+        if (e.code === 'ENOENT') {
+          fs.mkdirSync(currentPath)
+        } else {
+          throw e
+        }
+      }
+      return currentPath
+    }, '')
+}

examples/protocol-and-stream-muxing/README.md

@@ -169,7 +169,7 @@ You can see this working on example [3.js](./3.js). The result should look like
 > node 3.js
 from 1 to 2
 Addresses by which both peers are connected
-node 1 to node 2: /ip4/127.0.0.1/tcp/50629/ipfs/QmZwMKTo6wG4Te9A6M2eJnWDpR8uhsGed4YRegnV5DcKiv
-node 2 to node 1: /ip4/127.0.0.1/tcp/50630/ipfs/QmRgormJQeDyXhDKma11eUtksoh8vWmeBoxghVt4meauW9
+node 1 to node 2: /ip4/127.0.0.1/tcp/50629/p2p/QmZwMKTo6wG4Te9A6M2eJnWDpR8uhsGed4YRegnV5DcKiv
+node 2 to node 1: /ip4/127.0.0.1/tcp/50630/p2p/QmRgormJQeDyXhDKma11eUtksoh8vWmeBoxghVt4meauW9
 from 2 to 1
 ```

examples/pubsub/1.js

@@ -7,6 +7,7 @@ const Mplex = require('libp2p-mplex')
 const SECIO = require('libp2p-secio')
 const PeerInfo = require('peer-info')
 const MulticastDNS = require('libp2p-mdns')
+const Gossipsub = require('libp2p-gossipsub')
 const defaultsDeep = require('@nodeutils/defaults-deep')
 const waterfall = require('async/waterfall')
 const parallel = require('async/parallel')
@@ -19,7 +20,8 @@ class MyBundle extends libp2p {
         transport: [ TCP ],
         streamMuxer: [ Mplex ],
         connEncryption: [ SECIO ],
-        peerDiscovery: [ MulticastDNS ]
+        peerDiscovery: [ MulticastDNS ],
+        pubsub: Gossipsub
       },
       config: {
         peerDiscovery: {
@@ -28,8 +30,9 @@ class MyBundle extends libp2p {
             enabled: true
           }
         },
-        EXPERIMENTAL: {
-          pubsub: true
+        pubsub: {
+          enabled: true,
+          emitSelf: true
         }
       }
     }
@@ -62,25 +65,39 @@ parallel([
   const node1 = nodes[0]
   const node2 = nodes[1]
 
-  series([
-    (cb) => node1.once('peer:discovery', (peer) => node1.dial(peer, cb)),
-    (cb) => setTimeout(cb, 500)
-  ], (err) => {
-    if (err) { throw err }
+  node1.once('peer:connect', (peer) => {
+    console.log('connected to %s', peer.id.toB58String())
 
-    // Subscribe to the topic 'news'
-    node1.pubsub.subscribe('news',
-      (msg) => console.log(msg.from, msg.data.toString()),
-      () => {
+    series([
+      // node1 subscribes to "news"
+      (cb) => node1.pubsub.subscribe(
+        'news',
+        (msg) => console.log(`node1 received: ${msg.data.toString()}`),
+        cb
+      ),
+      (cb) => setTimeout(cb, 500),
+      // node2 subscribes to "news"
+      (cb) => node2.pubsub.subscribe(
+        'news',
+        (msg) => console.log(`node2 received: ${msg.data.toString()}`),
+        cb
+      ),
+      (cb) => setTimeout(cb, 500),
+      // node2 publishes "news" every second
+      (cb) => {
         setInterval(() => {
-          // Publish the message on topic 'news'
           node2.pubsub.publish(
             'news',
             Buffer.from('Bird bird bird, bird is the word!'),
-            () => {}
+            (err) => {
+              if (err) { throw err }
+            }
           )
         }, 1000)
-      }
-    )
+        cb()
+      },
+    ], (err) => {
+      if (err) { throw err }
+    })
   })
 })

examples/pubsub/README.md

@@ -1,6 +1,6 @@
 # Publish Subscribe
 
-Publish Subscribe is also included on the stack. Currently, we have on PubSub implementation which we ship by default [libp2p-floodsub](https://github.com/libp2p/js-libp2p-floodsub), with many more being researched at [research-pubsub](https://github.com/libp2p/research-pubsub).
+Publish Subscribe is also included on the stack. Currently, we have two PubSub implementation available [libp2p-floodsub](https://github.com/libp2p/js-libp2p-floodsub) and [libp2p-gossipsub](https://github.com/ChainSafe/gossipsub-js), with many more being researched at [research-pubsub](https://github.com/libp2p/research-pubsub).
 
 We've seen many interesting use cases appear with this, here are some highlights:
 
@@ -12,29 +12,43 @@ We've seen many interesting use cases appear with this, here are some highlights
 
 For this example, we will use MulticastDNS for automatic Peer Discovery. This example is based the previous examples found in [Discovery Mechanisms](../discovery-mechanisms). You can find the complete version at [1.js](./1.js).
 
-Using PubSub is super simple, all you have to do is start a libp2p node, PubSub will be enabled by default.
+Using PubSub is super simple, you only need to provide the implementation of your choice and you are ready to go. No need for extra configuration.
 
 ```JavaScript
-series([
-  (cb) => node1.once('peer:discovery', (peer) => node1.dial(peer, cb)),
-  (cb) => setTimeout(cb, 500)
-], (err) => {
-  if (err) { throw err }
+node1.once('peer:connect', (peer) => {
+  console.log('connected to %s', peer.id.toB58String())
 
-  // Subscribe to the topic 'news'
-  node1.pubsub.subscribe('news',
-    (msg) => console.log(msg.from, msg.data.toString()),
-    () => {
+  series([
+    // node1 subscribes to "news"
+    (cb) => node1.pubsub.subscribe(
+      'news',
+      (msg) => console.log(`node1 received: ${msg.data.toString()}`),
+      cb
+    ),
+    (cb) => setTimeout(cb, 500),
+    // node2 subscribes to "news"
+    (cb) => node2.pubsub.subscribe(
+      'news',
+      (msg) => console.log(`node2 received: ${msg.data.toString()}`),
+      cb
+    ),
+    (cb) => setTimeout(cb, 500),
+    // node2 publishes "news" every second
+    (cb) => {
       setInterval(() => {
-        // Publish the message on topic 'news'
         node2.pubsub.publish(
           'news',
           Buffer.from('Bird bird bird, bird is the word!'),
-          () => {}
+          (err) => {
+            if (err) { throw err }
+          }
         )
       }, 1000)
-    }
-  )
+      cb()
+    },
+  ], (err) => {
+    if (err) { throw err }
+  })
 })
 ```
 
@@ -42,11 +56,30 @@ The output of the program should look like:
 
 ```
 > node 1.js
-QmWpvkKm6qHLhoxpWrTswY6UMNWDyn8hN265Qp9ZYvgS82 Bird bird bird, bird is the word!
-QmWpvkKm6qHLhoxpWrTswY6UMNWDyn8hN265Qp9ZYvgS82 Bird bird bird, bird is the word!
-QmWpvkKm6qHLhoxpWrTswY6UMNWDyn8hN265Qp9ZYvgS82 Bird bird bird, bird is the word!
-QmWpvkKm6qHLhoxpWrTswY6UMNWDyn8hN265Qp9ZYvgS82 Bird bird bird, bird is the word!
-QmWpvkKm6qHLhoxpWrTswY6UMNWDyn8hN265Qp9ZYvgS82 Bird bird bird, bird is the word!
+connected to QmWpvkKm6qHLhoxpWrTswY6UMNWDyn8hN265Qp9ZYvgS82
+node2 received: Bird bird bird, bird is the word!
+node1 received: Bird bird bird, bird is the word!
+node2 received: Bird bird bird, bird is the word!
+node1 received: Bird bird bird, bird is the word!
+```
+
+You can change the pubsub `emitSelf` option if you don't want the publishing node to receive its own messages.
+
+```JavaScript
+const defaults = {
+  config: {
+    peerDiscovery: {
+      mdns: {
+        interval: 2000,
+        enabled: true
+      }
+    },
+    pubsub: {
+      enabled: true,
+      emitSelf: false
+    }
+  }
+}
 ```
 
 ## 2. Future work

examples/transports/README.md

@@ -88,8 +88,8 @@ Running this should result in something like:
 > node 1.js
 node has started (true/false): true
 listening on:
-/ip4/127.0.0.1/tcp/61329/ipfs/QmW2cKTakTYqbQkUzBTEGXgWYFj1YEPeUndE1YWs6CBzDQ
-/ip4/192.168.2.156/tcp/61329/ipfs/QmW2cKTakTYqbQkUzBTEGXgWYFj1YEPeUndE1YWs6CBzDQ
+/ip4/127.0.0.1/tcp/61329/p2p/QmW2cKTakTYqbQkUzBTEGXgWYFj1YEPeUndE1YWs6CBzDQ
+/ip4/192.168.2.156/tcp/61329/p2p/QmW2cKTakTYqbQkUzBTEGXgWYFj1YEPeUndE1YWs6CBzDQ
 ```
 
 That `QmW2cKTakTYqbQkUzBTEGXgWYFj1YEPeUndE1YWs6CBzDQ` is the PeerId that was created during the PeerInfo generation.
@@ -175,11 +175,11 @@ The result should be look like:
 ```bash
 > node 2.js
 node 1 is listening on:
-/ip4/127.0.0.1/tcp/62279/ipfs/QmeM4wNWv1uci7UJjUXZYfvcy9uqAbw7G9icuxdqy88Mj9
-/ip4/192.168.2.156/tcp/62279/ipfs/QmeM4wNWv1uci7UJjUXZYfvcy9uqAbw7G9icuxdqy88Mj9
+/ip4/127.0.0.1/tcp/62279/p2p/QmeM4wNWv1uci7UJjUXZYfvcy9uqAbw7G9icuxdqy88Mj9
+/ip4/192.168.2.156/tcp/62279/p2p/QmeM4wNWv1uci7UJjUXZYfvcy9uqAbw7G9icuxdqy88Mj9
 node 2 is listening on:
-/ip4/127.0.0.1/tcp/62278/ipfs/QmWp58xJgzbouNJcyiNNTpZuqQCJU8jf6ixc7TZT9xEZhV
-/ip4/192.168.2.156/tcp/62278/ipfs/QmWp58xJgzbouNJcyiNNTpZuqQCJU8jf6ixc7TZT9xEZhV
+/ip4/127.0.0.1/tcp/62278/p2p/QmWp58xJgzbouNJcyiNNTpZuqQCJU8jf6ixc7TZT9xEZhV
+/ip4/192.168.2.156/tcp/62278/p2p/QmWp58xJgzbouNJcyiNNTpZuqQCJU8jf6ixc7TZT9xEZhV
 Hello p2p world!
 ```
 
@@ -304,14 +304,14 @@ If everything was set correctly, you now should see the following after you run
 ```Bash
 > node 3.js
 node 1 is listening on:
-/ip4/127.0.0.1/tcp/62620/ipfs/QmWpWmcVJkF6EpmAaVDauku8g1uFGuxPsGP35XZp9GYEqs
-/ip4/192.168.2.156/tcp/62620/ipfs/QmWpWmcVJkF6EpmAaVDauku8g1uFGuxPsGP35XZp9GYEqs
+/ip4/127.0.0.1/tcp/62620/p2p/QmWpWmcVJkF6EpmAaVDauku8g1uFGuxPsGP35XZp9GYEqs
+/ip4/192.168.2.156/tcp/62620/p2p/QmWpWmcVJkF6EpmAaVDauku8g1uFGuxPsGP35XZp9GYEqs
 node 2 is listening on:
-/ip4/127.0.0.1/tcp/10000/ws/ipfs/QmWAQtWdzWXibgfyc7WRHhhv6MdqVKzXvyfSTnN2aAvixX
-/ip4/127.0.0.1/tcp/62619/ipfs/QmWAQtWdzWXibgfyc7WRHhhv6MdqVKzXvyfSTnN2aAvixX
-/ip4/192.168.2.156/tcp/62619/ipfs/QmWAQtWdzWXibgfyc7WRHhhv6MdqVKzXvyfSTnN2aAvixX
+/ip4/127.0.0.1/tcp/10000/ws/p2p/QmWAQtWdzWXibgfyc7WRHhhv6MdqVKzXvyfSTnN2aAvixX
+/ip4/127.0.0.1/tcp/62619/p2p/QmWAQtWdzWXibgfyc7WRHhhv6MdqVKzXvyfSTnN2aAvixX
+/ip4/192.168.2.156/tcp/62619/p2p/QmWAQtWdzWXibgfyc7WRHhhv6MdqVKzXvyfSTnN2aAvixX
 node 3 is listening on:
-/ip4/127.0.0.1/tcp/20000/ws/ipfs/QmVq1PWh3VSDYdFqYMtqp4YQyXcrH27N7968tGdM1VQPj1
+/ip4/127.0.0.1/tcp/20000/ws/p2p/QmVq1PWh3VSDYdFqYMtqp4YQyXcrH27N7968tGdM1VQPj1
 node 3 failed to dial to node 1 with: No available transport to dial to
 node 1 dialed to node 2 successfully
 node 2 dialed to node 3 successfully

package-list.json

@@ -18,14 +18,11 @@
     "Transport",
     ["libp2p/interface-transport", "interface-transport"],
     ["libp2p/js-libp2p-tcp", "libp2p-tcp"],
-    ["libp2p/js-libp2p-udp", "libp2p-udp"],
-    ["libp2p/js-libp2p-udt", "libp2p-udt"],
     ["libp2p/js-libp2p-utp", "libp2p-utp"],
     ["libp2p/js-libp2p-webrtc-direct", "libp2p-webrtc-direct"],
     ["libp2p/js-libp2p-webrtc-star", "libp2p-webrtc-star"],
     ["libp2p/js-libp2p-websockets", "libp2p-websockets"],
     ["libp2p/js-libp2p-websocket-star", "libp2p-websocket-star"],
-    ["libp2p/js-libp2p-websocket-star-rendezvous", "libp2p-websocket-star-rendezvous"],
 
     "Crypto Channels",
     ["libp2p/js-libp2p-secio", "libp2p-secio"],
@@ -44,15 +41,6 @@
     ["libp2p/js-libp2p-webrtc-star", "libp2p-webrtc-star"],
     ["libp2p/js-libp2p-websocket-star", "libp2p-websocket-star"],
 
-    "NAT Traversal",
-    ["libp2p/js-libp2p-circuit", "libp2p-circuit"],
-    ["libp2p/js-libp2p-nat-mngr", "libp2p-nat-mngr"],
-
-    "Data Types",
-    ["libp2p/js-peer-book", "peer-book"],
-    ["libp2p/js-peer-id", "peer-id"],
-    ["libp2p/js-peer-info", "peer-info"],
-
     "Content Routing",
     ["libp2p/interface-content-routing", "interface-content-routing"],
     ["libp2p/js-libp2p-delegated-content-routing", "libp2p-delegated-content-routing"],
@@ -63,24 +51,16 @@
     ["libp2p/js-libp2p-delegated-peer-routing", "libp2p-delegated-peer-routing"],
     ["libp2p/js-libp2p-kad-dht", "libp2p-kad-dht"],
 
-    "Record Store",
-    ["libp2p/interface-record-store", "interface-record-store"],
-    ["libp2p/js-libp2p-record", "libp2p-record"],
-
-    "Generics",
-    ["libp2p/js-libp2p-connection-manager", "libp2p-connection-manager"],
+    "Utilities",
     ["libp2p/js-libp2p-crypto", "libp2p-crypto"],
     ["libp2p/js-libp2p-crypto-secp256k1", "libp2p-crypto-secp256k1"],
-    ["libp2p/js-libp2p-switch", "libp2p-switch"],
+
+    "Data Types",
+    ["libp2p/js-peer-book", "peer-book"],
+    ["libp2p/js-peer-id", "peer-id"],
+    ["libp2p/js-peer-info", "peer-info"],
 
     "Extensions",
-    ["libp2p/js-libp2p-floodsub", "libp2p-floodsub"],
-    ["libp2p/js-libp2p-identify", "libp2p-identify"],
-    ["libp2p/js-libp2p-keychain", "libp2p-keychain"],
-    ["libp2p/js-libp2p-ping", "libp2p-ping"],
-    ["libp2p/js-libp2p-pnet", "libp2p-pnet"],
-
-    "Utilities",
-    ["libp2p/js-p2pcat", "p2pcat"]
+    ["libp2p/js-libp2p-floodsub", "libp2p-floodsub"]
   ]
 }

package.json

@@ -1,7 +1,7 @@
 {
   "name": "libp2p",
-  "version": "0.24.2",
-  "description": "JavaScript base class for libp2p bundles",
+  "version": "0.26.2",
+  "description": "JavaScript implementation of libp2p, a modular peer to peer network stack",
   "leadMaintainer": "Jacob Heun <jacobheun@gmail.com>",
   "main": "src/index.js",
   "files": [
@@ -17,80 +17,107 @@
     "release": "aegir release -t node -t browser",
     "release-minor": "aegir release --type minor -t node -t browser",
     "release-major": "aegir release --type major -t node -t browser",
-    "coverage": "aegir coverage",
-    "coverage-publish": "aegir coverage --provider coveralls"
+    "coverage": "nyc --reporter=text --reporter=lcov npm run test:node"
   },
   "repository": {
     "type": "git",
     "url": "https://github.com/libp2p/js-libp2p.git"
   },
   "keywords": [
+    "libp2p",
+    "network",
+    "p2p",
+    "peer",
+    "peer-to-peer",
     "IPFS"
   ],
-  "engines": {
-    "node": ">=6.0.0",
-    "npm": ">=3.0.0"
-  },
-  "license": "MIT",
   "bugs": {
     "url": "https://github.com/libp2p/js-libp2p/issues"
   },
-  "homepage": "https://github.com/libp2p/js-libp2p",
+  "homepage": "https://libp2p.io",
+  "license": "MIT",
   "browser": {
-    "joi": "joi-browser",
     "./test/utils/bundle-nodejs": "./test/utils/bundle-browser"
   },
+  "engines": {
+    "node": ">=10.0.0",
+    "npm": ">=6.0.0"
+  },
   "dependencies": {
-    "async": "^2.6.1",
-    "debug": "^4.1.0",
+    "async": "^2.6.2",
+    "bignumber.js": "^9.0.0",
+    "class-is": "^1.1.0",
+    "debug": "^4.1.1",
     "err-code": "^1.1.2",
     "fsm-event": "^2.1.0",
-    "joi": "^14.0.6",
-    "joi-browser": "^13.4.0",
-    "libp2p-connection-manager": "~0.0.2",
-    "libp2p-floodsub": "~0.15.1",
-    "libp2p-ping": "~0.8.3",
-    "libp2p-switch": "~0.41.2",
-    "libp2p-websockets": "~0.12.0",
-    "mafmt": "^6.0.2",
-    "multiaddr": "^5.0.2",
-    "peer-book": "~0.8.0",
-    "peer-id": "~0.12.0",
-    "peer-info": "~0.14.1"
+    "hashlru": "^2.3.0",
+    "interface-connection": "~0.3.3",
+    "latency-monitor": "~0.2.1",
+    "libp2p-crypto": "~0.16.1",
+    "libp2p-websockets": "^0.12.2",
+    "mafmt": "^6.0.7",
+    "merge-options": "^1.0.1",
+    "moving-average": "^1.0.0",
+    "multiaddr": "^6.1.0",
+    "multistream-select": "~0.14.6",
+    "once": "^1.4.0",
+    "peer-book": "^0.9.1",
+    "peer-id": "^0.12.2",
+    "peer-info": "~0.15.1",
+    "pull-cat": "^1.1.11",
+    "pull-defer": "~0.2.3",
+    "pull-handshake": "^1.1.4",
+    "pull-reader": "^1.3.1",
+    "pull-stream": "^3.6.9",
+    "promisify-es6": "^1.0.3",
+    "protons": "^1.0.1",
+    "retimer": "^2.0.0",
+    "superstruct": "^0.6.0",
+    "xsalsa20": "^1.0.2"
   },
   "devDependencies": {
     "@nodeutils/defaults-deep": "^1.1.0",
-    "aegir": "^17.0.1",
+    "aegir": "^20.0.0",
     "chai": "^4.2.0",
     "chai-checkmark": "^1.0.1",
-    "cids": "~0.5.5",
+    "cids": "^0.7.1",
+    "delay": "^4.3.0",
     "dirty-chai": "^2.0.1",
-    "electron-webrtc": "~0.3.0",
-    "interface-datastore": "~0.6.0",
-    "libp2p-bootstrap": "~0.9.3",
-    "libp2p-circuit": "~0.3.0",
-    "libp2p-delegated-content-routing": "~0.2.2",
-    "libp2p-delegated-peer-routing": "~0.2.2",
-    "libp2p-kad-dht": "~0.11.1",
-    "libp2p-mdns": "~0.12.0",
-    "libp2p-mplex": "~0.8.4",
-    "libp2p-secio": "~0.10.1",
-    "libp2p-spdy": "~0.13.0",
-    "libp2p-tcp": "~0.13.0",
-    "libp2p-webrtc-star": "~0.15.5",
-    "libp2p-websocket-star": "~0.9.0",
-    "libp2p-websocket-star-rendezvous": "~0.2.4",
+    "electron-webrtc": "^0.3.0",
+    "interface-datastore": "^0.6.0",
+    "libp2p-bootstrap": "^0.9.7",
+    "libp2p-delegated-content-routing": "^0.2.2",
+    "libp2p-delegated-peer-routing": "^0.2.2",
+    "libp2p-floodsub": "~0.17.0",
+    "libp2p-gossipsub": "~0.0.4",
+    "libp2p-kad-dht": "^0.15.3",
+    "libp2p-mdns": "^0.12.3",
+    "libp2p-mplex": "^0.8.4",
+    "libp2p-pnet": "~0.1.0",
+    "libp2p-secio": "^0.11.1",
+    "libp2p-spdy": "^0.13.2",
+    "libp2p-tcp": "^0.13.0",
+    "libp2p-webrtc-star": "^0.16.1",
+    "libp2p-websocket-star": "~0.10.2",
+    "libp2p-websocket-star-rendezvous": "~0.4.1",
     "lodash.times": "^4.3.2",
-    "nock": "^10.0.2",
+    "nock": "^10.0.6",
+    "portfinder": "^1.0.20",
     "pull-goodbye": "0.0.2",
-    "pull-serializer": "~0.3.2",
-    "pull-stream": "^3.6.9",
-    "sinon": "^7.1.1",
-    "webrtcsupport": "^2.2.0",
-    "wrtc": "~0.3.2"
+    "pull-length-prefixed": "^1.3.3",
+    "pull-mplex": "^0.1.2",
+    "pull-pair": "^1.1.0",
+    "pull-protocol-buffers": "~0.1.2",
+    "pull-serializer": "^0.3.2",
+    "sinon": "^7.2.7",
+    "wrtc": "^0.4.1"
   },
   "contributors": [
+    "Aditya Bose <13054902+adbose@users.noreply.github.com>",
+    "Alan Shaw <alan.shaw@protocol.ai>",
     "Alan Shaw <alan@tableflip.io>",
+    "Alex Potsides <alex@achingbrain.net>",
+    "Andrew Nesbitt <andrewnez@gmail.com>",
     "Chris Bratlien <chrisbratlien@gmail.com>",
     "Chris Dostert <chrisdostert@users.noreply.github.com>",
     "Daijiro Wachi <daijiro.wachi@gmail.com>",
@@ -98,10 +125,13 @@
     "Diogo Silva <fsdiogo@gmail.com>",
     "Dmitriy Ryajov <dryajov@gmail.com>",
     "Elven <mon.samuel@qq.com>",
+    "Fei Liu <liu.feiwood@gmail.com>",
     "Florian-Merle <florian.david.merle@gmail.com>",
     "Friedel Ziegelmayer <dignifiedquire@gmail.com>",
     "Giovanni T. Parra <fiatjaf@gmail.com>",
+    "Guy Sviry <32539816+guysv@users.noreply.github.com>",
     "Henrique Dias <hacdias@gmail.com>",
+    "Hugo Dias <mail@hugodias.me>",
     "Hugo Dias <hugomrdias@gmail.com>",
     "Irakli Gozalishvili <rfobic@gmail.com>",
     "Jacob Heun <jacobheun@gmail.com>",
@@ -118,14 +148,21 @@
     "RasmusErik Voel Jensen <github@solsort.com>",
     "Richard Littauer <richard.littauer@gmail.com>",
     "Ryan Bell <ryan@piing.net>",
+    "Soeren <nikorpoulsen@gmail.com>",
     "Sönke Hahn <soenkehahn@gmail.com>",
+    "Thomas Eizinger <thomas@eizinger.io>",
     "Tiago Alves <alvesjtiago@gmail.com>",
-    "Vasco Santos <vasco.santos@ua.pt>",
     "Vasco Santos <vasco.santos@moxy.studio>",
+    "Vasco Santos <vasco.santos@ua.pt>",
     "Volker Mische <volker.mische@gmail.com>",
+    "Yusef Napora <yusef@napora.org>",
     "Zane Starr <zcstarr@gmail.com>",
+    "a1300 <a1300@users.noreply.github.com>",
+    "ebinks <elizabethjbinks@gmail.com>",
     "greenkeeperio-bot <support@greenkeeper.io>",
+    "isan_rivkin <isanrivkin@gmail.com>",
     "mayerwin <mayerwin@users.noreply.github.com>",
+    "swedneck <40505480+swedneck@users.noreply.github.com>",
     "ᴠɪᴄᴛᴏʀ ʙᴊᴇʟᴋʜᴏʟᴍ <victorbjelkholm@gmail.com>"
   ]
 }

pdd/pdd-the-ipfs-bundle--story-1--peer-a.js

@@ -59,7 +59,7 @@ test('story 1 - peerA', (t) => {
     t.ifErr(err, 'created Node successfully')
     t.ok(node.isStarted(), 'PeerA is Running')
 
-    const peerBAddr = `/ip4/127.0.0.1/tcp/10001/ipfs/${PeerB.id}`
+    const peerBAddr = `/ip4/127.0.0.1/tcp/10001/p2p/${PeerB.id}`
 
     node.handle('/time/1.0.0', (protocol, conn) => {
       pull(

pdd/pdd-the-ipfs-bundle--story-1--peer-b.js

@@ -59,7 +59,7 @@ test('story 1 - peerA', (t) => {
     t.ifErr(err, 'created Node successfully')
     t.ok(node.isStarted(), 'PeerB is Running')
 
-    const peerAAddr = `/ip4/127.0.0.1/tcp/10000/ipfs/${PeerA.id}`
+    const peerAAddr = `/ip4/127.0.0.1/tcp/10000/p2p/${PeerA.id}`
 
     node.handle('/echo/1.0.0', (protocol, conn) => {
       pull(

pdd/pdd-transport--story-1--peer-a.js

@@ -33,7 +33,7 @@ test('story 1 - peerA', (t) => {
     t.ifErr(err, 'created Node')
     t.ok(node.isStarted(), 'PeerA is running')
 
-    const PeerBAddr = `/ip4/127.0.0.1/tcp/10001/ipfs/${PeerB.id}`
+    const PeerBAddr = `/ip4/127.0.0.1/tcp/10001/p2p/${PeerB.id}`
 
     node.dial(PeerBAddr, '/echo/1.0.0', (err, conn) => {
       t.ifErr(err, 'dial successful')

pdd/pdd-transport--story-2--peer-a.js

@@ -33,7 +33,7 @@ test('story 2 - peerA', (t) => {
     t.ifErr(err, 'created Node')
     t.ok(node.isStarted(), 'PeerA is running')
 
-    const PeerBAddr = `/ip4/127.0.0.1/tcp/10001/ws/ipfs/${PeerB.id}`
+    const PeerBAddr = `/ip4/127.0.0.1/tcp/10001/p2p/${PeerB.id}`
 
     node.dial(PeerBAddr, '/echo/1.0.0', (err, conn) => {
       t.ifErr(err, 'dial successful')

pdd/pdd-transport--story-3--peer-a.js

@@ -32,7 +32,7 @@ test('story 3 - peerA', (t) => {
     t.ifErr(err, 'created Node')
     t.ok(node.isStarted(), 'PeerA is running')
 
-    const PeerBAddr = `/ip4/127.0.0.1/tcp/10001/ws/ipfs/${PeerB.id}`
+    const PeerBAddr = `/ip4/127.0.0.1/tcp/10001/ws/p2p/${PeerB.id}`
 
     setTimeout(() => node.dial(PeerBAddr, '/echo/1.0.0', (err, conn) => {
       t.ok(err, 'dial failed')

pdd/pdd-transport--story-3--peer-b.js

@@ -32,7 +32,7 @@ test('story 3 - peerB', (t) => {
     t.ifErr(err, 'created Node')
     t.ok(node.isStarted(), 'PeerA is running')
 
-    const PeerAAddr = `/ip4/127.0.0.1/tcp/10000/ws/ipfs/${PeerA.id}`
+    const PeerAAddr = `/ip4/127.0.0.1/tcp/10000/ws/p2p/${PeerA.id}`
 
     setTimeout(() => node.dial(PeerAAddr, '/echo/1.0.0', (err, conn) => {
       t.ok(err, 'dial failed')

src/circuit/IMPLEMENTATION_NOTES.md

@@ -0,0 +1,128 @@
+EDIT: This document is outdated and here only for historical purposes
+
+NOTE: This document is structured in an `if-then/else[if]-then` manner, each line is a precondition for following lines with a higher number of indentation
+
+Example:
+
+- if there are apples
+    - eat them
+- if not, check for pears
+    - then eat them
+- if not, check for cherries
+    - then eat them
+
+Or,
+
+- if there are apples
+    - eat them
+- if not
+    - check for pears
+        - then eat them
+- if not
+    - check for cherries
+        - then eat them
+
+In order to minimize nesting, the first example is preferred
+
+# Relay flow
+
+## Relay transport (dialer/listener)
+
+- ### Dial over a relay
+    - See if there is a relay that's already connected to the destination peer, if not
+        - Ask all the peer's known relays to dial the destination peer until an active relay (one that can dial on behalf of other peers), or a relay that may have recently acquired a connection to the destination peer is successful. 
+            - If successful
+                - Write the `/ipfs/relay/circuit/1.0.0` header to the relay, followed by the destination address
+                    -  e.g. `/ipfs/relay/circuit/1.0.0\n/p2p-circuit/ipfs/QmDest`.
+            - If no relays could connect, fail the same way a regular transport would
+    - Once the connection has been established, the swarm should treat it as a regular connection, 
+        - i.e. muxing, encrypt, etc should all be performed on the relayed connection
+
+- ### Listen for relayed connections
+    - Peer mounts the `/ipfs/relay/circuit/1.0.0` proto and listens for relayed connections
+        - A connection arrives
+            - read the address of the source peer from the incoming connection stream
+                - if valid, create a PeerInfo object for that peer and add the incoming address to its multiaddresses list
+                - pass the connection to `protocolMuxer(swarm.protocols, conn)` to have it go through the regular muxing/encryption flow
+                
+- ### Relay discovery and static relay addresses in swarm config
+
+    - #### Relay address in swarm config
+       - A peer has relay addresses in its swarm config section
+           - On node startup, connect to the relays in swarm config
+                - if successful add address to swarms PeerInfo's multiaddresses
+                    - `identify` should take care of announcing that the peer is reachable over the listed relays
+
+    - #### Passive relay discovery
+        - A peer that can dial over `/ipfs/relay/circuit/1.0.0` listens for the `peer-mux-established` swarm event, every time a new muxed connection arrives, it checks if the incoming peer is a relay. (How would this work? Some way of discovering if its a relay is required.)
+           - *Useful in cases when the peer/node doesn't know of any relays on startup and also, to learn of as many additional relays in the network as possible*
+           - *Useful during startup, when connecting to bootstrap nodes. It allows us to implicitly learn if its a relay without having to explicitly add `/p2p-circuit` addresses to the bootstrap list*
+           - *Also useful if the relay communicates its capabilities upon connecting to it, as to avoid additional unnecessary requests/queries. I.e. if it supports weather its able to forward connections and weather it supports the `ls` or other commands.*
+           - *Should it be possible to disable passive relay discovery?*
+               - This could be useful when the peer wants to be reachable **only** over the listed relays
+       - If the incoming peer is a relay, send an `ls` and record its peers
+
+## Relay Nodes
+
+- ### Passive relay node
+    - *A passive relay does not explicitly dial into any requested peer, only those that it's swarm already has connections to.*
+        - When the relay gets a request, read the the destination peer's multiaddr from the connection stream and if its a valid address and peer id
+            - check its swarm's peerbook(?) see if its a known peer, if it is
+                - use the swarms existing connection and
+                    - send the multistream header and the source peer address to the dest peer
+                        - e.g. `/ipfs/relay/circuit/1.0.0\n/p2p-circuit/ipfs/QmSource`
+                    - circuit the source and dest connections
+                - if couldn't dial, or the connection/stream to the dest peer closed prematurelly
+                    - close the src stream
+
+
+- ### Active relay node
+    - *An active relay node can dial other peers even if its swarm doesnt know about those peers*
+        - When the relay gets a request, read the the destination peer's multiaddr from the connection stream and if its a valid address and peer id
+            - use the swarm to dial to the dest node
+                - send the multistream header and the source peer address to the dest peer
+                    - e.g. `/ipfs/relay/circuit/1.0.0\n/p2p-circuit/ipfs/QmSource`
+                - circuit the source and dest connections
+            - if couldn't dial, or the connection/stream to the dest peer closed prematurely
+                - close the src stream
+
+- ### `ls` command
+    - *A relay node can allow the peers known to it's swarm to be listed*
+        - *this should be possible to enable/disable from the config*
+            - when a relay gets the `ls` request
+                - if enabled, get its swarm's peerbook's known peers and return their ids and multiaddrs
+                    - e.g `[{id: /ipfs/QmPeerId, addrs: ['ma1', 'ma2', 'ma3']}, ...]`
+                - if disabled, respond with `na`
+
+
+## Relay Implementation notes
+
+- ### Relay transport
+    - Currently I've implemented the dialer and listener parts of the relay as a transport, meaning that it *tries* to implement the `interface-transport` interface as closely as possible. This seems to work pretty well and it's makes the dialer/listener parts really easy to plug in into the swarm. I think this is the cleanest solution.
+
+- ### `circuit-relay`
+    - This is implemented as a separate piece (not a transport), and it can be enabled/disabled with a config. The transport listener however, will do the initial parsing of the incoming header and figure out weather it's a connection that's needs to be handled by the circuit-relay, or its a connection that is being relayed from a circuit-relay.
+
+## Relay swarm integration
+
+- The relay transport is mounted explicitly by calling the `swarm.connection.relay(config.relay)` from libp2p
+    - Swarm will register the dialer and listener using the swarm `transport.add` and `transport.listen` methods
+
+    - ### Listener 
+        - the listener registers itself as a multistream handler on the `/ipfs/relay/circuit/1.0.0` proto
+            - if `circuit-relay` is enabled, the listener will delegate connections to it if appropriate
+        - when the listener receives a connection, it will read the multiaddr and determine if its a connection that needs to be relayed, or its a connection that is being relayed
+
+    - ### Dialer
+        - When the swarm attempts to dial to a peer, it will filter the protocols that the peer can be reached on
+            - *The relay will be used in two cases*
+            - If the peer has an explicit relay address that it can be reached on
+                -  no other transport is available
+                    - The relay will attempt to dial the peer over that relay
+            - If no explicit relay address is provided
+                -  no other transport is available
+                    -  A generic circuit address will be added to the peers multiaddr list
+                        - i.e. `/p2p-circuit/ipfs/QmDest`
+            - If another transport is available, then use that instead of the relay
+    
+

src/circuit/README.md

@@ -0,0 +1,156 @@
+# js-libp2p-circuit
+
+> Node.js implementation of the Circuit module that libp2p uses, which implements the [interface-connection](https://github.com/libp2p/interface-connection) interface for dial/listen.
+
+**Note**: git history prior to merging into js-libp2p can be found in the original repository, https://github.com/libp2p/js-libp2p-circuit.
+
+`libp2p-circuit` implements the circuit-relay mechanism that allows nodes that don't speak the same protocol to communicate using a third _relay_ node.
+
+This module uses [pull-streams](https://pull-stream.github.io) for all stream based interfaces.
+
+### Why?
+
+`circuit-relaying` uses additional nodes in order to transfer traffic between two otherwise unreachable nodes. This allows nodes that don't speak the same protocols or are running in limited environments, e.g. browsers and IoT devices, to communicate, which would otherwise be impossible given the fact that for example browsers don't have any socket support and as such cannot be directly dialed.
+
+The use of circuit-relaying is not limited to routing traffic between browser nodes, other uses include:
+ - routing traffic between private nets and circumventing NAT layers
+ - route mangling for better privacy (matreshka/shallot dialing).
+
+ It's also possible to use it for clients that implement exotic transports such as  devices that only have bluetooth radios to be reachable over bluetooth enabled relays and become full p2p nodes.
+
+### libp2p-circuit and IPFS
+
+Prior to `libp2p-circuit` there was a rift in the IPFS network, were IPFS nodes could only access content from nodes that speak the same protocol, for example TCP only nodes could only dial to other TCP only nodes, same for any other protocol combination. In practice, this limitation was most visible in JS-IPFS browser nodes, since they can only dial out but not be dialed in over WebRTC or WebSockets, hence any content that the browser node held was not reachable by the rest of the network even through it was announced on the DHT. Non browser IPFS nodes would usually speak more than one protocol such as TCP, WebSockets and/or WebRTC, this made the problem less severe outside of the browser. `libp2p-circuit` solves this problem completely, as long as there are `relay nodes` capable of routing traffic between those nodes their content should be available to the rest of the IPFS network.
+
+## Table of Contents
+
+- [Install](#install)
+  - [npm](#npm)
+- [Usage](#usage)
+  - [Example](#example)
+  - [This module uses `pull-streams`](#this-module-uses-pull-streams)
+    - [Converting `pull-streams` to Node.js Streams](#converting-pull-streams-to-nodejs-streams)
+- [API](#api)
+- [Contribute](#contribute)
+- [License](#license)
+
+## Usage
+
+### Example
+
+#### Create dialer/listener
+
+```js
+const Circuit = require('libp2p-circuit')
+const multiaddr = require('multiaddr')
+const pull = require('pull-stream')
+
+const mh1 = multiaddr('/p2p-circuit/ipfs/QmHash') // dial /ipfs/QmHash over any circuit
+
+const circuit = new Circuit(swarmInstance, options) // pass swarm instance and options
+
+const listener = circuit.createListener(mh1, (connection) => {
+  console.log('new connection opened')
+  pull(
+    pull.values(['hello']),
+    socket
+  )
+})
+
+listener.listen(() => {
+  console.log('listening')
+
+  pull(
+    circuit.dial(mh1),
+    pull.log,
+    pull.onEnd(() => {
+      circuit.close()
+    })
+  )
+})
+```
+
+Outputs:
+
+```sh
+listening
+new connection opened
+hello
+```
+
+#### Create `relay`
+
+```js
+const Relay = require('libp2p-circuit').Relay
+
+const relay = new Relay(options)
+
+relay.mount(swarmInstance) // start relaying traffic
+```
+
+### This module uses `pull-streams`
+
+We expose a streaming interface based on `pull-streams`, rather then on the Node.js core streams implementation (aka Node.js streams). `pull-streams` offers us a better mechanism for error handling and flow control guarantees. If you would like to know more about why we did this, see the discussion at this [issue](https://github.com/ipfs/js-ipfs/issues/362).
+
+You can learn more about pull-streams at:
+
+- [The history of Node.js streams, nodebp April 2014](https://www.youtube.com/watch?v=g5ewQEuXjsQ)
+- [The history of streams, 2016](http://dominictarr.com/post/145135293917/history-of-streams)
+- [pull-streams, the simple streaming primitive](http://dominictarr.com/post/149248845122/pull-streams-pull-streams-are-a-very-simple)
+- [pull-streams documentation](https://pull-stream.github.io/)
+
+#### Converting `pull-streams` to Node.js Streams
+
+If you are a Node.js streams user, you can convert a pull-stream to a Node.js stream using the module [`pull-stream-to-stream`](https://github.com/dominictarr/pull-stream-to-stream), giving you an instance of a Node.js stream that is linked to the pull-stream. For example:
+
+```js
+const pullToStream = require('pull-stream-to-stream')
+
+const nodeStreamInstance = pullToStream(pullStreamInstance)
+// nodeStreamInstance is an instance of a Node.js Stream
+```
+
+To learn more about this utility, visit https://pull-stream.github.io/#pull-stream-to-stream.
+
+## API
+
+[![](https://raw.githubusercontent.com/libp2p/interface-transport/master/img/badge.png)](https://github.com/libp2p/interface-transport)
+
+`libp2p-circuit` accepts Circuit addresses for both IPFS and non IPFS encapsulated addresses, i.e:
+
+`/p2p-circuit/ip4/127.0.0.1/tcp/4001/ipfs/QmHash`
+
+Both for dialing and listening.
+
+### Implementation rational
+
+This module is not a transport, however it implements `interface-transport` interface in order to allow circuit to be plugged with `libp2p-swarm`. The rational behind it is that, `libp2p-circuit` has a dial and listen flow, which fits nicely with other transports, moreover, it requires the _raw_ connection to be encrypted and muxed just as a regular transport's connection does. All in all, `interface-transport` ended up being the correct level of abstraction for circuit, as well as allowed us to reuse existing integration points in `libp2p-swarm` and `libp2p` without adding any ad-hoc logic. All parts of `interface-transport` are used, including `.getAddr` which returns a list of `/p2p-circuit` addresses that circuit is currently listening.
+
+```
+libp2p                                                                                  libp2p-circuit (transport)
++-------------------------------------------------+                                     +--------------------------+
+|        +---------------------------------+      |                                     |                          |
+|        |                                 |      |                                     |   +------------------+   |
+|        |                                 |      |  circuit-relay listens for the HOP  |   |                  |   |
+|        |           libp2p-swarm          <------------------------------------------------|  circuit-relay   |   |
+|        |                                 |      |  message to handle incomming relay  |   |                  |   |
+|        |                                 |      |  requests from other nodes          |   +------------------+   |
+|        +---------------------------------+      |                                     |                          |
+|         ^     ^   ^  ^   ^           ^          |                                     |   +------------------+   |
+|         |     |   |  |   |           |          |                                     |   | +-------------+  |   |
+|         |     |   |  |   |           |          |  dialer uses libp2p-swarm to dial   |   | |             |  |   |
+|         |     |   |  +---------------------------------------------------------------------->   dialer    |  |   |
+|         |     | transports           |          |  to a circuit-relay node using the  |   | |             |  |   |
+|         |     |   |      |           |          |  HOP message                        |   | +-------------+  |   |
+|         |     |   |      |           |          |                                     |   |                  |   |
+|         v     v   |      v           v          |                                     |   |                  |   |
+|+------------------|----------------------------+|                                     |   |  +-------------+ |   |
+||           |      |    |      |                ||                                     |   |  |             | |   |
+||libp2p-tcp |libp2p-ws  | .... |libp2p-circuit  ||  listener handles STOP messages from|   |  | listener    | |   |
+||           |      +-------------------------------------------------------------------------->             | |   |
+||           |           |      |plugs in just   ||  circuit-relay nodes                |   |  +-------------+ |   |
+||           |           |      |as any other    ||                                     |   |                  |   |
+||           |           |      |transport       ||                                     |   +------------------+   |
+|+-----------------------------------------------+|                                     |                          |
++-------------------------------------------------+                                     +--------------------------+
+```

src/circuit/circuit.js

@@ -0,0 +1,126 @@
+'use strict'
+
+const mafmt = require('mafmt')
+const multiaddr = require('multiaddr')
+
+const CircuitDialer = require('./circuit/dialer')
+const utilsFactory = require('./circuit/utils')
+
+const debug = require('debug')
+const log = debug('libp2p:circuit:transportdialer')
+log.err = debug('libp2p:circuit:error:transportdialer')
+
+const createListener = require('./listener')
+
+class Circuit {
+  static get tag () {
+    return 'Circuit'
+  }
+
+  /**
+   * Creates an instance of Dialer.
+   *
+   * @param {Swarm} swarm - the swarm
+   * @param {any} options - config options
+   *
+   * @memberOf Dialer
+   */
+  constructor (swarm, options) {
+    this.options = options || {}
+
+    this.swarm = swarm
+    this.dialer = null
+    this.utils = utilsFactory(swarm)
+    this.peerInfo = this.swarm._peerInfo
+    this.relays = this.filter(this.peerInfo.multiaddrs.toArray())
+
+    // if no explicit relays, add a default relay addr
+    if (this.relays.length === 0) {
+      this.peerInfo
+        .multiaddrs
+        .add(`/p2p-circuit/ipfs/${this.peerInfo.id.toB58String()}`)
+    }
+
+    this.dialer = new CircuitDialer(swarm, options)
+
+    this.swarm.on('peer-mux-established', (peerInfo) => {
+      this.dialer.canHop(peerInfo)
+    })
+    this.swarm.on('peer-mux-closed', (peerInfo) => {
+      this.dialer.relayPeers.delete(peerInfo.id.toB58String())
+    })
+  }
+
+  /**
+   * Dial the relays in the Addresses.Swarm config
+   *
+   * @param {Array} relays
+   * @return {void}
+   */
+  _dialSwarmRelays () {
+    // if we have relay addresses in swarm config, then dial those relays
+    this.relays.forEach((relay) => {
+      const relaySegments = relay
+        .toString()
+        .split('/p2p-circuit')
+        .filter(segment => segment.length)
+
+      relaySegments.forEach((relaySegment) => {
+        const ma = this.utils.peerInfoFromMa(multiaddr(relaySegment))
+        this.dialer._dialRelay(ma)
+      })
+    })
+  }
+
+  /**
+   * Dial a peer over a relay
+   *
+   * @param {multiaddr} ma - the multiaddr of the peer to dial
+   * @param {Object} options - dial options
+   * @param {Function} cb - a callback called once dialed
+   * @returns {Connection} - the connection
+   *
+   * @memberOf Dialer
+   */
+  dial (ma, options, cb) {
+    return this.dialer.dial(ma, options, cb)
+  }
+
+  /**
+   * Create a listener
+   *
+   * @param {any} options
+   * @param {Function} handler
+   * @return {listener}
+   */
+  createListener (options, handler) {
+    if (typeof options === 'function') {
+      handler = options
+      options = this.options || {}
+    }
+
+    const listener = createListener(this.swarm, options, handler)
+    listener.on('listen', this._dialSwarmRelays.bind(this))
+    return listener
+  }
+
+  /**
+   * Filter check for all multiaddresses
+   * that this transport can dial on
+   *
+   * @param {any} multiaddrs
+   * @returns {Array<multiaddr>}
+   *
+   * @memberOf Dialer
+   */
+  filter (multiaddrs) {
+    if (!Array.isArray(multiaddrs)) {
+      multiaddrs = [multiaddrs]
+    }
+    return multiaddrs.filter((ma) => {
+      return mafmt.Circuit.matches(ma)
+    })
+  }
+}
+
+module.exports = Circuit

src/circuit/circuit/dialer.js

@@ -0,0 +1,275 @@
+'use strict'
+
+const once = require('once')
+const PeerId = require('peer-id')
+const waterfall = require('async/waterfall')
+const setImmediate = require('async/setImmediate')
+const multiaddr = require('multiaddr')
+
+const Connection = require('interface-connection').Connection
+
+const utilsFactory = require('./utils')
+const StreamHandler = require('./stream-handler')
+
+const debug = require('debug')
+const log = debug('libp2p:circuit:dialer')
+log.err = debug('libp2p:circuit:error:dialer')
+
+const multicodec = require('../multicodec')
+const proto = require('../protocol')
+
+class Dialer {
+  /**
+   * Creates an instance of Dialer.
+   * @param {Swarm} swarm - the swarm
+   * @param {any} options - config options
+   *
+   * @memberOf Dialer
+   */
+  constructor (swarm, options) {
+    this.swarm = swarm
+    this.relayPeers = new Map()
+    this.relayConns = new Map()
+    this.options = options
+    this.utils = utilsFactory(swarm)
+  }
+
+  /**
+   * Helper that returns a relay connection
+   *
+   * @param {*} relay
+   * @param {*} callback
+   * @returns {Function} - callback
+   */
+  _dialRelayHelper (relay, callback) {
+    if (this.relayConns.has(relay.id.toB58String())) {
+      return callback(null, this.relayConns.get(relay.id.toB58String()))
+    }
+
+    return this._dialRelay(relay, callback)
+  }
+
+  /**
+   * Dial a peer over a relay
+   *
+   * @param {multiaddr} ma - the multiaddr of the peer to dial
+   * @param {Function} cb - a callback called once dialed
+   * @returns {Connection} - the connection
+   *
+   */
+  dial (ma, cb) {
+    cb = cb || (() => { })
+    const strMa = ma.toString()
+    if (!strMa.includes('/p2p-circuit')) {
+      log.err('invalid circuit address')
+      return cb(new Error('invalid circuit address'))
+    }
+
+    const addr = strMa.split('p2p-circuit') // extract relay address if any
+    const relay = addr[0] === '/' ? null : multiaddr(addr[0])
+    const peer = multiaddr(addr[1] || addr[0])
+
+    const dstConn = new Connection()
+    setImmediate(
+      this._dialPeer.bind(this),
+      peer,
+      relay,
+      (err, conn) => {
+        if (err) {
+          log.err(err)
+          return cb(err)
+        }
+
+        dstConn.setInnerConn(conn)
+        cb(null, dstConn)
+      })
+
+    return dstConn
+  }
+
+  /**
+   * Does the peer support the HOP protocol
+   *
+   * @param {PeerInfo} peer
+   * @param {Function} callback
+   * @returns {void}
+   */
+  canHop (peer, callback) {
+    callback = once(callback || (() => { }))
+
+    this._dialRelayHelper(peer, (err, conn) => {
+      if (err) {
+        return callback(err)
+      }
+
+      const sh = new StreamHandler(conn)
+      waterfall([
+        (cb) => sh.write(proto.CircuitRelay.encode({
+          type: proto.CircuitRelay.Type.CAN_HOP
+        }), cb),
+        (cb) => sh.read(cb)
+      ], (err, msg) => {
+        if (err) {
+          return callback(err)
+        }
+        const response = proto.CircuitRelay.decode(msg)
+
+        if (response.code !== proto.CircuitRelay.Status.SUCCESS) {
+          const err = new Error(`HOP not supported, skipping - ${this.utils.getB58String(peer)}`)
+          log(err)
+          return callback(err)
+        }
+
+        log('HOP supported adding as relay - %s', this.utils.getB58String(peer))
+        this.relayPeers.set(this.utils.getB58String(peer), peer)
+        sh.close()
+        callback()
+      })
+    })
+  }
+
+  /**
+   * Dial the destination peer over a relay
+   *
+   * @param {multiaddr} dstMa
+   * @param {Connection|PeerInfo} relay
+   * @param {Function} cb
+   * @return {Function|void}
+   * @private
+   */
+  _dialPeer (dstMa, relay, cb) {
+    if (typeof relay === 'function') {
+      cb = relay
+      relay = null
+    }
+
+    if (!cb) {
+      cb = () => {}
+    }
+
+    dstMa = multiaddr(dstMa)
+    // if no relay provided, dial on all available relays until one succeeds
+    if (!relay) {
+      const relays = Array.from(this.relayPeers.values())
+      const next = (nextRelay) => {
+        if (!nextRelay) {
+          const err = 'no relay peers were found or all relays failed to dial'
+          log.err(err)
+          return cb(err)
+        }
+
+        return this._negotiateRelay(
+          nextRelay,
+          dstMa,
+          (err, conn) => {
+            if (err) {
+              log.err(err)
+              return next(relays.shift())
+            }
+            cb(null, conn)
+          })
+      }
+      next(relays.shift())
+    } else {
+      return this._negotiateRelay(
+        relay,
+        dstMa,
+        (err, conn) => {
+          if (err) {
+            log.err('An error has occurred negotiating the relay connection', err)
+            return cb(err)
+          }
+
+          return cb(null, conn)
+        })
+    }
+  }
+
+  /**
+   * Negotiate the relay connection
+   *
+   * @param {Multiaddr|PeerInfo|Connection} relay - the Connection or PeerInfo of the relay
+   * @param {multiaddr} dstMa - the multiaddr of the peer to relay the connection for
+   * @param {Function} callback - a callback which gets the negotiated relay connection
+   * @returns {void}
+   * @private
+   *
+   * @memberOf Dialer
+   */
+  _negotiateRelay (relay, dstMa, callback) {
+    dstMa = multiaddr(dstMa)
+    relay = this.utils.peerInfoFromMa(relay)
+    const srcMas = this.swarm._peerInfo.multiaddrs.toArray()
+    this._dialRelayHelper(relay, (err, conn) => {
+      if (err) {
+        log.err(err)
+        return callback(err)
+      }
+      const sh = new StreamHandler(conn)
+      waterfall([
+        (cb) => {
+          log('negotiating relay for peer %s', dstMa.getPeerId())
+          let dstPeerId
+          try {
+            dstPeerId = PeerId.createFromB58String(dstMa.getPeerId()).id
+          } catch (err) {
+            return cb(err)
+          }
+          sh.write(
+            proto.CircuitRelay.encode({
+              type: proto.CircuitRelay.Type.HOP,
+              srcPeer: {
+                id: this.swarm._peerInfo.id.id,
+                addrs: srcMas.map((addr) => addr.buffer)
+              },
+              dstPeer: {
+                id: dstPeerId,
+                addrs: [dstMa.buffer]
+              }
+            }), cb)
+        },
+        (cb) => sh.read(cb)
+      ], (err, msg) => {
+        if (err) {
+          return callback(err)
+        }
+        const message = proto.CircuitRelay.decode(msg)
+        if (message.type !== proto.CircuitRelay.Type.STATUS) {
+          return callback(new Error('Got invalid message type - ' +
+            `expected ${proto.CircuitRelay.Type.STATUS} got ${message.type}`))
+        }
+
+        if (message.code !== proto.CircuitRelay.Status.SUCCESS) {
+          return callback(new Error(`Got ${message.code} error code trying to dial over relay`))
+        }
+
+        callback(null, new Connection(sh.rest()))
+      })
+    })
+  }
+
+  /**
+   * Dial a relay peer by its PeerInfo
+   *
+   * @param {PeerInfo} peer - the PeerInfo of the relay peer
+   * @param {Function} cb - a callback with the connection to the relay peer
+   * @returns {void}
+   * @private
+   */
+  _dialRelay (peer, cb) {
+    cb = once(cb || (() => { }))
+
+    this.swarm.dial(
+      peer,
+      multicodec.relay,
+      once((err, conn) => {
+        if (err) {
+          log.err(err)
+          return cb(err)
+        }
+        cb(null, conn)
+      }))
+  }
+}
+
+module.exports = Dialer

src/circuit/circuit/hop.js

@@ -0,0 +1,283 @@
+'use strict'
+
+const pull = require('pull-stream/pull')
+const debug = require('debug')
+const PeerInfo = require('peer-info')
+const PeerId = require('peer-id')
+const EE = require('events').EventEmitter
+const once = require('once')
+const utilsFactory = require('./utils')
+const StreamHandler = require('./stream-handler')
+const proto = require('../protocol').CircuitRelay
+const multiaddr = require('multiaddr')
+const series = require('async/series')
+const waterfall = require('async/waterfall')
+const setImmediate = require('async/setImmediate')
+
+const multicodec = require('./../multicodec')
+
+const log = debug('libp2p:circuit:relay')
+log.err = debug('libp2p:circuit:error:relay')
+
+class Hop extends EE {
+  /**
+   * Construct a Circuit object
+   *
+   * This class will handle incoming circuit connections and
+   * either start a relay or hand the relayed connection to
+   * the swarm
+   *
+   * @param {Swarm} swarm
+   * @param {Object} options
+   */
+  constructor (swarm, options) {
+    super()
+    this.swarm = swarm
+    this.peerInfo = this.swarm._peerInfo
+    this.utils = utilsFactory(swarm)
+    this.config = options || { active: false, enabled: false }
+    this.active = this.config.active
+  }
+
+  /**
+   * Handle the relay message
+   *
+   * @param {CircuitRelay} message
+   * @param {StreamHandler} sh
+   * @returns {*}
+   */
+  handle (message, sh) {
+    if (!this.config.enabled) {
+      this.utils.writeResponse(
+        sh,
+        proto.Status.HOP_CANT_SPEAK_RELAY)
+      return sh.close()
+    }
+
+    // check if message is `CAN_HOP`
+    if (message.type === proto.Type.CAN_HOP) {
+      this.utils.writeResponse(
+        sh,
+        proto.Status.SUCCESS)
+      return sh.close()
+    }
+
+    // This is a relay request - validate and create a circuit
+    let srcPeerId = null
+    let dstPeerId = null
+    try {
+      srcPeerId = PeerId.createFromBytes(message.srcPeer.id).toB58String()
+      dstPeerId = PeerId.createFromBytes(message.dstPeer.id).toB58String()
+    } catch (err) {
+      log.err(err)
+
+      if (!srcPeerId) {
+        this.utils.writeResponse(
+          sh,
+          proto.Status.HOP_SRC_MULTIADDR_INVALID)
+        return sh.close()
+      }
+
+      if (!dstPeerId) {
+        this.utils.writeResponse(
+          sh,
+          proto.Status.HOP_DST_MULTIADDR_INVALID)
+        return sh.close()
+      }
+    }
+
+    if (srcPeerId === dstPeerId) {
+      this.utils.writeResponse(
+        sh,
+        proto.Status.HOP_CANT_RELAY_TO_SELF)
+      return sh.close()
+    }
+
+    if (!message.dstPeer.addrs.length) {
+      // TODO: use encapsulate here
+      const addr = multiaddr(`/p2p-circuit/ipfs/${dstPeerId}`).buffer
+      message.dstPeer.addrs.push(addr)
+    }
+
+    log('trying to establish a circuit: %s <-> %s', srcPeerId, dstPeerId)
+    const noPeer = () => {
+      // log.err(err)
+      this.utils.writeResponse(
+        sh,
+        proto.Status.HOP_NO_CONN_TO_DST)
+      return sh.close()
+    }
+
+    const isConnected = (cb) => {
+      let dstPeer
+      try {
+        dstPeer = this.swarm._peerBook.get(dstPeerId)
+        if (!dstPeer.isConnected() && !this.active) {
+          const err = new Error(`No Connection to peer ${dstPeerId}`)
+          noPeer(err)
+          return cb(err)
+        }
+      } catch (err) {
+        if (!this.active) {
+          noPeer(err)
+          return cb(err)
+        }
+      }
+      cb()
+    }
+
+    series([
+      (cb) => this.utils.validateAddrs(message, sh, proto.Type.HOP, cb),
+      (cb) => isConnected(cb),
+      (cb) => this._circuit(sh, message, cb)
+    ], (err) => {
+      if (err) {
+        log.err(err)
+        sh.close()
+        return setImmediate(() => this.emit('circuit:error', err))
+      }
+      setImmediate(() => this.emit('circuit:success'))
+    })
+  }
+
+  /**
+   * Connect to STOP
+   *
+   * @param {PeerInfo} peer
+   * @param {StreamHandler} srcSh
+   * @param {function} callback
+   * @returns {void}
+   */
+  _connectToStop (peer, srcSh, callback) {
+    this._dialPeer(peer, (err, dstConn) => {
+      if (err) {
+        this.utils.writeResponse(
+          srcSh,
+          proto.Status.HOP_CANT_DIAL_DST)
+        log.err(err)
+        return callback(err)
+      }
+
+      return this.utils.writeResponse(
+        srcSh,
+        proto.Status.SUCCESS,
+        (err) => {
+          if (err) {
+            log.err(err)
+            return callback(err)
+          }
+          return callback(null, dstConn)
+        })
+    })
+  }
+
+  /**
+   * Negotiate STOP
+   *
+   * @param {StreamHandler} dstSh
+   * @param {StreamHandler} srcSh
+   * @param {CircuitRelay} message
+   * @param {function} callback
+   * @returns {void}
+   */
+  _negotiateStop (dstSh, srcSh, message, callback) {
+    const stopMsg = Object.assign({}, message, {
+      type: proto.Type.STOP // change the message type
+    })
+    dstSh.write(proto.encode(stopMsg),
+      (err) => {
+        if (err) {
+          this.utils.writeResponse(
+            srcSh,
+            proto.Status.HOP_CANT_OPEN_DST_STREAM)
+          log.err(err)
+          return callback(err)
+        }
+
+        // read response from STOP
+        dstSh.read((err, msg) => {
+          if (err) {
+            log.err(err)
+            return callback(err)
+          }
+
+          const message = proto.decode(msg)
+          if (message.code !== proto.Status.SUCCESS) {
+            return callback(new Error('Unable to create circuit!'))
+          }
+
+          return callback(null, msg)
+        })
+      })
+  }
+
+  /**
+   * Attempt to make a circuit from A <-> R <-> B where R is this relay
+   *
+   * @param {StreamHandler} srcSh - the source stream handler
+   * @param {CircuitRelay} message - the message with the src and dst entries
+   * @param {Function} callback - callback to signal success or failure
+   * @returns {void}
+   * @private
+   */
+  _circuit (srcSh, message, callback) {
+    let dstSh = null
+    waterfall([
+      (cb) => this._connectToStop(message.dstPeer, srcSh, cb),
+      (_dstConn, cb) => {
+        dstSh = new StreamHandler(_dstConn)
+        this._negotiateStop(dstSh, srcSh, message, cb)
+      }
+    ], (err) => {
+      if (err) {
+        // close/end the source stream if there was an error
+        if (srcSh) {
+          srcSh.close()
+        }
+
+        if (dstSh) {
+          dstSh.close()
+        }
+        return callback(err)
+      }
+
+      const src = srcSh.rest()
+      const dst = dstSh.rest()
+
+      const srcIdStr = PeerId.createFromBytes(message.srcPeer.id).toB58String()
+      const dstIdStr = PeerId.createFromBytes(message.dstPeer.id).toB58String()
+
+      // circuit the src and dst streams
+      pull(
+        src,
+        dst,
+        src
+      )
+      log('circuit %s <-> %s established', srcIdStr, dstIdStr)
+      callback()
+    })
+  }
+
+  /**
+   * Dial the dest peer and create a circuit
+   *
+   * @param {Multiaddr} dstPeer
+   * @param {Function} callback
+   * @returns {void}
+   * @private
+   */
+  _dialPeer (dstPeer, callback) {
+    const peerInfo = new PeerInfo(PeerId.createFromBytes(dstPeer.id))
+    dstPeer.addrs.forEach((a) => peerInfo.multiaddrs.add(a))
+    this.swarm.dial(peerInfo, multicodec.relay, once((err, conn) => {
+      if (err) {
+        log.err(err)
+        return callback(err)
+      }
+
+      callback(null, conn)
+    }))
+  }
+}
+
+module.exports = Hop

src/circuit/circuit/stop.js

@@ -0,0 +1,56 @@
+'use strict'
+
+const setImmediate = require('async/setImmediate')
+
+const EE = require('events').EventEmitter
+const Connection = require('interface-connection').Connection
+const utilsFactory = require('./utils')
+const PeerInfo = require('peer-info')
+const proto = require('../protocol').CircuitRelay
+const series = require('async/series')
+
+const debug = require('debug')
+
+const log = debug('libp2p:circuit:stop')
+log.err = debug('libp2p:circuit:error:stop')
+
+class Stop extends EE {
+  constructor (swarm) {
+    super()
+    this.swarm = swarm
+    this.utils = utilsFactory(swarm)
+  }
+
+  /**
+   * Handle the incoming STOP message
+   *
+   * @param {{}} msg  - the parsed protobuf message
+   * @param {StreamHandler} sh  - the stream handler wrapped connection
+   * @param {Function} callback  - callback
+   * @returns {undefined}
+   */
+  handle (msg, sh, callback) {
+    callback = callback || (() => {})
+
+    series([
+      (cb) => this.utils.validateAddrs(msg, sh, proto.Type.STOP, cb),
+      (cb) => this.utils.writeResponse(sh, proto.Status.Success, cb)
+    ], (err) => {
+      if (err) {
+        // we don't return the error here,
+        // since multistream select don't expect one
+        callback()
+        return log(err)
+      }
+
+      const peerInfo = new PeerInfo(this.utils.peerIdFromId(msg.srcPeer.id))
+      msg.srcPeer.addrs.forEach((addr) => peerInfo.multiaddrs.add(addr))
+      const newConn = new Connection(sh.rest())
+      newConn.setPeerInfo(peerInfo)
+      setImmediate(() => this.emit('connection', newConn))
+      callback(newConn)
+    })
+  }
+}
+
+module.exports = Stop

src/circuit/circuit/stream-handler.js

@@ -0,0 +1,140 @@
+'use strict'
+
+const values = require('pull-stream/sources/values')
+const collect = require('pull-stream/sinks/collect')
+const empty = require('pull-stream/sources/empty')
+const pull = require('pull-stream/pull')
+const lp = require('pull-length-prefixed')
+const handshake = require('pull-handshake')
+
+const debug = require('debug')
+const log = debug('libp2p:circuit:stream-handler')
+log.err = debug('libp2p:circuit:error:stream-handler')
+
+class StreamHandler {
+  /**
+   * Create a stream handler for connection
+   *
+   * @param {Connection} conn - connection to read/write
+   * @param {Function|undefined} cb - handshake callback called on error
+   * @param {Number} timeout - handshake timeout
+   * @param {Number} maxLength - max bytes length of message
+   */
+  constructor (conn, cb, timeout, maxLength) {
+    this.conn = conn
+    this.stream = null
+    this.shake = null
+    this.timeout = cb || 1000 * 60
+    this.maxLength = maxLength || 4096
+
+    if (typeof cb === 'function') {
+      this.timeout = timeout || 1000 * 60
+    }
+
+    this.stream = handshake({ timeout: this.timeout }, cb)
+    this.shake = this.stream.handshake
+
+    pull(this.stream, conn, this.stream)
+  }
+
+  isValid () {
+    return this.conn && this.shake && this.stream
+  }
+
+  /**
+   * Read and decode message
+   *
+   * @param {Function} cb
+   * @returns {void|Function}
+   */
+  read (cb) {
+    if (!this.isValid()) {
+      return cb(new Error('handler is not in a valid state'))
+    }
+
+    lp.decodeFromReader(
+      this.shake,
+      { maxLength: this.maxLength },
+      (err, msg) => {
+        if (err) {
+          log.err(err)
+          // this.shake.abort(err)
+          return cb(err)
+        }
+
+        return cb(null, msg)
+      })
+  }
+
+  /**
+   * Encode and write array of buffers
+   *
+   * @param {Buffer[]} msg
+   * @param {Function} [cb]
+   * @returns {Function}
+   */
+  write (msg, cb) {
+    cb = cb || (() => {})
+
+    if (!this.isValid()) {
+      return cb(new Error('handler is not in a valid state'))
+    }
+
+    pull(
+      values([msg]),
+      lp.encode(),
+      collect((err, encoded) => {
+        if (err) {
+          log.err(err)
+          this.shake.abort(err)
+          return cb(err)
+        }
+
+        encoded.forEach((e) => this.shake.write(e))
+        cb()
+      })
+    )
+  }
+
+  /**
+   * Get the raw Connection
+   *
+   * @returns {null|Connection|*}
+   */
+  getRawConn () {
+    return this.conn
+  }
+
+  /**
+   * Return the handshake rest stream and invalidate handler
+   *
+   * @return {*|{source, sink}}
+   */
+  rest () {
+    const rest = this.shake.rest()
+
+    this.conn = null
+    this.stream = null
+    this.shake = null
+    return rest
+  }
+
+  /**
+   * Close the stream
+   *
+   * @returns {undefined}
+   */
+  close () {
+    if (!this.isValid()) {
+      return
+    }
+
+    // close stream
+    pull(
+      empty(),
+      this.rest()
+    )
+  }
+}
+
+module.exports = StreamHandler

src/circuit/circuit/utils.js

@@ -0,0 +1,118 @@
+'use strict'
+
+const multiaddr = require('multiaddr')
+const PeerInfo = require('peer-info')
+const PeerId = require('peer-id')
+const proto = require('../protocol')
+const { getPeerInfo } = require('../../get-peer-info')
+
+module.exports = function (swarm) {
+  /**
+   * Get b58 string from multiaddr or peerinfo
+   *
+   * @param {Multiaddr|PeerInfo} peer
+   * @return {*}
+   */
+  function getB58String (peer) {
+    let b58Id = null
+    if (multiaddr.isMultiaddr(peer)) {
+      const relayMa = multiaddr(peer)
+      b58Id = relayMa.getPeerId()
+    } else if (PeerInfo.isPeerInfo(peer)) {
+      b58Id = peer.id.toB58String()
+    }
+
+    return b58Id
+  }
+
+  /**
+   * Helper to make a peer info from a multiaddrs
+   *
+   * @param {Multiaddr|PeerInfo|PeerId} peer
+   * @return {PeerInfo}
+   * @private
+   */
+  function peerInfoFromMa (peer) {
+    return getPeerInfo(peer, swarm._peerBook)
+  }
+
+  /**
+   * Checks if peer has an existing connection
+   *
+   * @param {String} peerId
+   * @param {Swarm} swarm
+   * @return {Boolean}
+   */
+  function isPeerConnected (peerId) {
+    return swarm.muxedConns[peerId] || swarm.conns[peerId]
+  }
+
+  /**
+   * Write a response
+   *
+   * @param {StreamHandler} streamHandler
+   * @param {CircuitRelay.Status} status
+   * @param {Function} cb
+   * @returns {*}
+   */
+  function writeResponse (streamHandler, status, cb) {
+    cb = cb || (() => {})
+    streamHandler.write(proto.CircuitRelay.encode({
+      type: proto.CircuitRelay.Type.STATUS,
+      code: status
+    }))
+    return cb()
+  }
+
+  /**
+   * Validate incomming HOP/STOP message
+   *
+   * @param {CircuitRelay} msg
+   * @param {StreamHandler} streamHandler
+   * @param {CircuitRelay.Type} type
+   * @returns {*}
+   * @param {Function} cb
+   */
+  function validateAddrs (msg, streamHandler, type, cb) {
+    try {
+      msg.dstPeer.addrs.forEach((addr) => {
+        return multiaddr(addr)
+      })
+    } catch (err) {
+      writeResponse(streamHandler, type === proto.CircuitRelay.Type.HOP
+        ? proto.CircuitRelay.Status.HOP_DST_MULTIADDR_INVALID
+        : proto.CircuitRelay.Status.STOP_DST_MULTIADDR_INVALID)
+      return cb(err)
+    }
+
+    try {
+      msg.srcPeer.addrs.forEach((addr) => {
+        return multiaddr(addr)
+      })
+    } catch (err) {
+      writeResponse(streamHandler, type === proto.CircuitRelay.Type.HOP
+        ? proto.CircuitRelay.Status.HOP_SRC_MULTIADDR_INVALID
+        : proto.CircuitRelay.Status.STOP_SRC_MULTIADDR_INVALID)
+      return cb(err)
+    }
+
+    return cb(null)
+  }
+
+  function peerIdFromId (id) {
+    if (typeof id === 'string') {
+      return PeerId.createFromB58String(id)
+    }
+
+    return PeerId.createFromBytes(id)
+  }
+
+  return {
+    getB58String,
+    peerInfoFromMa,
+    isPeerConnected,
+    validateAddrs,
+    writeResponse,
+    peerIdFromId
+  }
+}

src/circuit/index.js

@@ -0,0 +1,3 @@
+'use strict'
+
+module.exports = require('./circuit')

src/circuit/listener.js

@@ -0,0 +1,149 @@
+'use strict'
+
+const setImmediate = require('async/setImmediate')
+
+const multicodec = require('./multicodec')
+const EE = require('events').EventEmitter
+const multiaddr = require('multiaddr')
+const mafmt = require('mafmt')
+const Stop = require('./circuit/stop')
+const Hop = require('./circuit/hop')
+const proto = require('./protocol')
+const utilsFactory = require('./circuit/utils')
+
+const StreamHandler = require('./circuit/stream-handler')
+
+const debug = require('debug')
+
+const log = debug('libp2p:circuit:listener')
+log.err = debug('libp2p:circuit:error:listener')
+
+module.exports = (swarm, options, connHandler) => {
+  const listener = new EE()
+  const utils = utilsFactory(swarm)
+
+  listener.stopHandler = new Stop(swarm)
+  listener.stopHandler.on('connection', (conn) => listener.emit('connection', conn))
+  listener.hopHandler = new Hop(swarm, options.hop)
+
+  /**
+   * Add swarm handler and listen for incoming connections
+   *
+   * @param {Multiaddr} ma
+   * @param {Function} callback
+   * @return {void}
+   */
+  listener.listen = (ma, callback) => {
+    callback = callback || (() => {})
+
+    swarm.handle(multicodec.relay, (_, conn) => {
+      const sh = new StreamHandler(conn)
+
+      sh.read((err, msg) => {
+        if (err) {
+          log.err(err)
+          return
+        }
+
+        let request = null
+        try {
+          request = proto.CircuitRelay.decode(msg)
+        } catch (err) {
+          return utils.writeResponse(
+            sh,
+            proto.CircuitRelay.Status.MALFORMED_MESSAGE)
+        }
+
+        switch (request.type) {
+          case proto.CircuitRelay.Type.CAN_HOP:
+          case proto.CircuitRelay.Type.HOP: {
+            return listener.hopHandler.handle(request, sh)
+          }
+
+          case proto.CircuitRelay.Type.STOP: {
+            return listener.stopHandler.handle(request, sh, connHandler)
+          }
+
+          default: {
+            utils.writeResponse(
+              sh,
+              proto.CircuitRelay.Status.INVALID_MSG_TYPE)
+            return sh.close()
+          }
+        }
+      })
+    })
+
+    setImmediate(() => listener.emit('listen'))
+    callback()
+  }
+
+  /**
+   * Remove swarm listener
+   *
+   * @param {Function} cb
+   * @return {void}
+   */
+  listener.close = (cb) => {
+    swarm.unhandle(multicodec.relay)
+    setImmediate(() => listener.emit('close'))
+    cb()
+  }
+
+  /**
+   * Get fixed up multiaddrs
+   *
+   * NOTE: This method will grab the peers multiaddrs and expand them such that:
+   *
+   * a) If it's an existing /p2p-circuit address for a specific relay i.e.
+   *    `/ip4/0.0.0.0/tcp/0/ipfs/QmRelay/p2p-circuit` this method will expand the
+   *    address to `/ip4/0.0.0.0/tcp/0/ipfs/QmRelay/p2p-circuit/ipfs/QmPeer` where
+   *    `QmPeer` is this peers id
+   * b) If it's not a /p2p-circuit address, it will encapsulate the address as a /p2p-circuit
+   *    addr, such when dialing over a relay with this address, it will create the circuit using
+   *    the encapsulated transport address. This is useful when for example, a peer should only
+   *    be dialed over TCP rather than any other transport
+   *
+   * @param {Function} callback
+   * @return {void}
+   */
+  listener.getAddrs = (callback) => {
+    let addrs = swarm._peerInfo.multiaddrs.toArray()
+
+    // get all the explicit relay addrs excluding self
+    const p2pAddrs = addrs.filter((addr) => {
+      return mafmt.Circuit.matches(addr) &&
+        !addr.toString().includes(swarm._peerInfo.id.toB58String())
+    })
+
+    // use the explicit relays instead of any relay
+    if (p2pAddrs.length) {
+      addrs = p2pAddrs
+    }
+
+    const listenAddrs = []
+    addrs.forEach((addr) => {
+      const peerMa = `/p2p-circuit/ipfs/${swarm._peerInfo.id.toB58String()}`
+      if (addr.toString() === peerMa) {
+        listenAddrs.push(multiaddr(peerMa))
+        return
+      }
+
+      if (!mafmt.Circuit.matches(addr)) {
+        if (addr.getPeerId()) {
+          // by default we're reachable over any relay
+          listenAddrs.push(multiaddr('/p2p-circuit').encapsulate(addr))
+        } else {
+          const ma = `${addr}/ipfs/${swarm._peerInfo.id.toB58String()}`
+          listenAddrs.push(multiaddr('/p2p-circuit').encapsulate(ma))
+        }
+      } else {
+        listenAddrs.push(addr.encapsulate(`/ipfs/${swarm._peerInfo.id.toB58String()}`))
+      }
+    })
+
+    callback(null, listenAddrs)
+  }
+
+  return listener
+}

src/circuit/multicodec.js

@@ -0,0 +1,5 @@
+'use strict'
+
+module.exports = {
+  relay: '/libp2p/circuit/relay/0.1.0'
+}

src/circuit/protocol/index.js

@@ -0,0 +1,44 @@
+'use strict'
+const protobuf = require('protons')
+module.exports = protobuf(`
+message CircuitRelay {
+
+  enum Status {
+    SUCCESS                    = 100;
+    HOP_SRC_ADDR_TOO_LONG      = 220;
+    HOP_DST_ADDR_TOO_LONG      = 221;
+    HOP_SRC_MULTIADDR_INVALID  = 250;
+    HOP_DST_MULTIADDR_INVALID  = 251;
+    HOP_NO_CONN_TO_DST         = 260;
+    HOP_CANT_DIAL_DST          = 261;
+    HOP_CANT_OPEN_DST_STREAM   = 262;
+    HOP_CANT_SPEAK_RELAY       = 270;
+    HOP_CANT_RELAY_TO_SELF     = 280;
+    STOP_SRC_ADDR_TOO_LONG     = 320;
+    STOP_DST_ADDR_TOO_LONG     = 321;
+    STOP_SRC_MULTIADDR_INVALID = 350;
+    STOP_DST_MULTIADDR_INVALID = 351;
+    STOP_RELAY_REFUSED         = 390;
+    MALFORMED_MESSAGE          = 400;
+  }
+
+  enum Type { // RPC identifier, either HOP, STOP or STATUS
+    HOP = 1;
+    STOP = 2;
+    STATUS = 3;
+    CAN_HOP = 4;
+  }
+
+  message Peer {
+    required bytes id = 1;    // peer id
+    repeated bytes addrs = 2; // peer's known addresses
+  }
+
+  optional Type type = 1;     // Type of the message
+
+  optional Peer srcPeer = 2;  // srcPeer and dstPeer are used when Type is HOP or STATUS
+  optional Peer dstPeer = 3;
+
+  optional Status code = 4;   // Status code, used when Type is STATUS
+}
+`)

src/config.js

@@ -1,55 +1,103 @@
 'use strict'
 
-const Joi = require('joi')
+const mergeOptions = require('merge-options')
+const { struct, superstruct } = require('superstruct')
+const { optional, list } = struct
 
-const ModuleSchema = Joi.alternatives().try(Joi.func(), Joi.object())
+const DefaultConfig = {
+  connectionManager: {
+    minPeers: 25
+  },
+  config: {
+    dht: {
+      enabled: false,
+      kBucketSize: 20,
+      randomWalk: {
+        enabled: false, // disabled waiting for https://github.com/libp2p/js-libp2p-kad-dht/issues/86
+        queriesPerPeriod: 1,
+        interval: 300e3,
+        timeout: 10e3
+      }
+    },
+    peerDiscovery: {
+      autoDial: true
+    },
+    pubsub: {
+      enabled: true,
+      emitSelf: true,
+      signMessages: true,
+      strictSigning: true
+    },
+    relay: {
+      enabled: true,
+      hop: {
+        enabled: false,
+        active: false
+      }
+    }
+  }
+}
 
-const OptionsSchema = Joi.object({
-  // TODO: create proper validators for the generics
-  connectionManager: Joi.object(),
-  datastore: Joi.object(),
-  peerInfo: Joi.object().required(),
-  peerBook: Joi.object(),
-  modules: Joi.object().keys({
-    connEncryption: Joi.array().items(ModuleSchema).allow(null),
-    connProtector: Joi.object().keys({
-      protect: Joi.func().required()
-    }).unknown(),
-    contentRouting: Joi.array().items(Joi.object()).allow(null),
-    dht: ModuleSchema.allow(null),
-    peerDiscovery: Joi.array().items(ModuleSchema).allow(null),
-    peerRouting: Joi.array().items(Joi.object()).allow(null),
-    streamMuxer: Joi.array().items(ModuleSchema).allow(null),
-    transport: Joi.array().items(ModuleSchema).min(1).required()
-  }).required(),
-  config: Joi.object().keys({
-    peerDiscovery: Joi.object().allow(null),
-    relay: Joi.object().keys({
-      enabled: Joi.boolean().default(true),
-      hop: Joi.object().keys({
-        enabled: Joi.boolean().default(false),
-        active: Joi.boolean().default(false)
+// Define custom types
+const s = superstruct({
+  types: {
+    transport: value => {
+      if (value.length === 0) return 'ERROR_EMPTY'
+      value.forEach(i => {
+        if (!i.dial) return 'ERR_NOT_A_TRANSPORT'
       })
-    }).default(),
-    dht: Joi.object().keys({
-      kBucketSize: Joi.number().default(20),
-      enabledDiscovery: Joi.boolean().default(true),
-      validators: Joi.object().allow(null),
-      selectors: Joi.object().allow(null)
-    }).default(),
-    EXPERIMENTAL: Joi.object().keys({
-      dht: Joi.boolean().default(false),
-      pubsub: Joi.boolean().default(false)
-    }).default()
-  }).default()
+      return true
+    },
+    protector: value => {
+      if (!value.protect) return 'ERR_NOT_A_PROTECTOR'
+      return true
+    }
+  }
 })
 
-module.exports.validate = (options) => {
-  options = Joi.attempt(options, OptionsSchema)
+const modulesSchema = s({
+  connEncryption: optional(list([s('object|function')])),
+  // this is hacky to simulate optional because interface doesnt work correctly with it
+  // change to optional when fixed upstream
+  connProtector: s('undefined|protector'),
+  contentRouting: optional(list(['object'])),
+  dht: optional(s('null|function|object')),
+  pubsub: optional(s('null|function|object')),
+  peerDiscovery: optional(list([s('object|function')])),
+  peerRouting: optional(list(['object'])),
+  streamMuxer: optional(list([s('object|function')])),
+  transport: 'transport'
+})
 
-  // Ensure dht is correct
-  if (options.config.EXPERIMENTAL.dht) {
-    Joi.assert(options.modules.dht, ModuleSchema.required())
+const configSchema = s({
+  peerDiscovery: 'object?',
+  relay: 'object?',
+  dht: 'object?',
+  pubsub: 'object?'
+})
+
+const optionsSchema = s({
+  switch: 'object?',
+  connectionManager: 'object?',
+  datastore: 'object?',
+  peerInfo: 'object',
+  peerBook: 'object?',
+  modules: modulesSchema,
+  config: configSchema
+})
+
+module.exports.validate = (opts) => {
+  opts = mergeOptions(DefaultConfig, opts)
+  const [error, options] = optionsSchema.validate(opts)
+
+  // Improve errors throwed, reduce stack by throwing here and add reason to the message
+  if (error) {
+    throw new Error(`${error.message}${error.reason ? ' - ' + error.reason : ''}`)
+  } else {
+    // Throw when dht is enabled but no dht module provided
+    if (options.config.dht.enabled) {
+      s('function|object')(options.modules.dht)
+    }
   }
 
   return options

src/connection-manager/README.md

@@ -0,0 +1,99 @@
+# libp2p-connection-manager
+
+> JavaScript connection manager for libp2p
+
+**Note**: git history prior to merging into js-libp2p can be found in the original repository, https://github.com/libp2p/js-libp2p-connection-manager.
+
+## Table of Contents
+
+- [Install](#install)
+  - [npm](#npm)
+  - [Use in Node.js, a browser with browserify, webpack or any other bundler](##use-in-nodejs-or-in-the-browser-with-browserify-webpack-or-any-other-bundler)
+- [Usage](#usage)
+- [API](#api)
+- [Contribute](#contribute)
+- [License](#license)
+
+## API
+
+A connection manager manages the peers you're connected to. The application provides one or more limits that will trigger the disconnection of peers. These limits can be any of the following:
+
+* number of connected peers
+* maximum bandwidth (sent / received or both)
+* maximum event loop delay
+
+The connection manager will disconnect peers (starting from the less important peers) until all the measures are withing the stated limits.
+
+A connection manager first disconnects the peers with the least value. By default all peers have the same importance (1), but the application can define otherwise. Once a peer disconnects the connection manager discards the peer importance. (If necessary, the application should redefine the peer state if the peer is again connected).
+
+
+### Create a ConnectionManager
+
+```js
+const libp2p = // …
+const options = {…}
+const connManager = new ConnManager(libp2p, options)
+```
+
+Options is an optional object with the following key-value pairs:
+
+* **`maxPeers`**: number identifying the maximum number of peers the current peer is willing to be connected to before is starts disconnecting. Defaults to `Infinity`
+* **`maxPeersPerProtocol`**: Object with key-value pairs, where a key is the protocol tag (case-insensitive) and the value is a number, representing the maximum number of peers allowing to connect for each protocol. Defaults to `{}`.
+* **`minPeers`**: number identifying the number of peers below which this node will not activate preemptive disconnections. Defaults to `0`.
+* **`maxData`**: sets the maximum data — in bytes per second -  (sent and received) this node is willing to endure before it starts disconnecting peers. Defaults to `Infinity`.
+* **`maxSentData`**: sets the maximum sent data — in bytes per second -  this node is willing to endure before it starts disconnecting peers. Defaults to `Infinity`.
+* **`maxReceivedData`**: sets the maximum received data — in bytes per second -  this node is willing to endure before it starts disconnecting peers. Defaults to `Infinity`.
+* **`maxEventLoopDelay`**: sets the maximum event loop delay (measured in miliseconds) this node is willing to endure before it starts disconnecting peers. Defaults to `Infinity`.
+* **`pollInterval`**: sets the poll interval (in miliseconds) for assessing the current state and determining if this peer needs to force a disconnect. Defaults to `2000` (2 seconds).
+* **`movingAverageInterval`**: the interval used to calculate moving averages (in miliseconds). Defaults to `60000` (1 minute).
+* **`defaultPeerValue`**: number between 0 and 1. Defaults to 1.
+
+
+### `connManager.start()`
+
+Starts the connection manager.
+
+### `connManager.stop()`
+
+Stops the connection manager.
+
+
+### `connManager.setPeerValue(peerId, value)`
+
+Sets the peer value for a given peer id. This is used to sort peers (in reverse order of value) to determine which to disconnect from first.
+
+Arguments:
+
+* peerId: B58-encoded string or [`peer-id`](https://github.com/libp2p/js-peer-id) instance.
+* value: a number between 0 and 1, which represents a scale of how valuable this given peer id is to the application.
+
+### `connManager.peers()`
+
+Returns the peers this connection manager is connected to.
+
+Returns an array of [PeerInfo](https://github.com/libp2p/js-peer-info).
+
+### `connManager.emit('limit:exceeded', limitName, measured)`
+
+Emitted when a limit is exceeded. Limit names can be:
+
+* `maxPeers`
+* `minPeers`
+* `maxData`
+* `maxSentData`
+* `maxReceivedData`
+* `maxEventLoopDelay`
+* a protocol tag string (lower-cased)
+
+
+### `connManager.emit('disconnect:preemptive', peerId)`
+
+Emitted when a peer is about to be preemptively disconnected.
+
+### `connManager.emit('disconnected', peerId)`
+
+Emitted when a peer is disconnected (preemptively or note). If this peer reconnects, you will need to reset it's value, since the connection manager does not remember it.
+
+### `connManager.emit('connected', peerId: String)`
+
+Emitted when a peer connects. This is a good event to set the peer value, so you can get some control over who gets banned once a maximum number of peers is reached.

src/connection-manager/index.js

@@ -0,0 +1,218 @@
+'use strict'
+
+const EventEmitter = require('events')
+const LatencyMonitor = require('latency-monitor').default
+const debug = require('debug')('libp2p:connection-manager')
+
+const defaultOptions = {
+  maxPeers: Infinity,
+  minPeers: 0,
+  maxData: Infinity,
+  maxSentData: Infinity,
+  maxReceivedData: Infinity,
+  maxEventLoopDelay: Infinity,
+  pollInterval: 2000,
+  movingAverageInterval: 60000,
+  defaultPeerValue: 1
+}
+
+class ConnectionManager extends EventEmitter {
+  constructor (libp2p, options) {
+    super()
+    this._libp2p = libp2p
+    this._options = Object.assign({}, defaultOptions, options)
+    this._options.maxPeersPerProtocol = fixMaxPeersPerProtocol(this._options.maxPeersPerProtocol)
+
+    debug('options: %j', this._options)
+
+    this._stats = libp2p.stats
+    if (options && !this._stats) {
+      throw new Error('No libp2p.stats')
+    }
+
+    this._peerValues = new Map()
+    this._peers = new Map()
+    this._peerProtocols = new Map()
+    this._peerCountPerProtocol = new Map()
+    this._onStatsUpdate = this._onStatsUpdate.bind(this)
+    this._onPeerConnect = this._onPeerConnect.bind(this)
+    this._onPeerDisconnect = this._onPeerDisconnect.bind(this)
+
+    if (this._libp2p.isStarted()) {
+      this._onceStarted()
+    } else {
+      this._libp2p.once('start', this._onceStarted.bind(this))
+    }
+  }
+
+  start () {
+    this._stats.on('update', this._onStatsUpdate)
+    this._libp2p.on('connection:start', this._onPeerConnect)
+    this._libp2p.on('connection:end', this._onPeerDisconnect)
+    // latency monitor
+    this._latencyMonitor = new LatencyMonitor({
+      dataEmitIntervalMs: this._options.pollInterval
+    })
+    this._onLatencyMeasure = this._onLatencyMeasure.bind(this)
+    this._latencyMonitor.on('data', this._onLatencyMeasure)
+  }
+
+  stop () {
+    this._stats.removeListener('update', this._onStatsUpdate)
+    this._libp2p.removeListener('connection:start', this._onPeerConnect)
+    this._libp2p.removeListener('connection:end', this._onPeerDisconnect)
+    this._latencyMonitor.removeListener('data', this._onLatencyMeasure)
+  }
+
+  setPeerValue (peerId, value) {
+    if (value < 0 || value > 1) {
+      throw new Error('value should be a number between 0 and 1')
+    }
+    if (peerId.toB58String) {
+      peerId = peerId.toB58String()
+    }
+    this._peerValues.set(peerId, value)
+  }
+
+  _onceStarted () {
+    this._peerId = this._libp2p.peerInfo.id.toB58String()
+  }
+
+  _onStatsUpdate () {
+    const movingAvgs = this._stats.global.movingAverages
+    const received = movingAvgs.dataReceived[this._options.movingAverageInterval].movingAverage()
+    this._checkLimit('maxReceivedData', received)
+    const sent = movingAvgs.dataSent[this._options.movingAverageInterval].movingAverage()
+    this._checkLimit('maxSentData', sent)
+    const total = received + sent
+    this._checkLimit('maxData', total)
+    debug('stats update', total)
+  }
+
+  _onPeerConnect (peerInfo) {
+    const peerId = peerInfo.id.toB58String()
+    debug('%s: connected to %s', this._peerId, peerId)
+    this._peerValues.set(peerId, this._options.defaultPeerValue)
+    this._peers.set(peerId, peerInfo)
+    this.emit('connected', peerId)
+    this._checkLimit('maxPeers', this._peers.size)
+
+    protocolsFromPeerInfo(peerInfo).forEach((protocolTag) => {
+      const protocol = this._peerCountPerProtocol[protocolTag]
+      if (!protocol) {
+        this._peerCountPerProtocol[protocolTag] = 0
+      }
+      this._peerCountPerProtocol[protocolTag]++
+
+      let peerProtocols = this._peerProtocols[peerId]
+      if (!peerProtocols) {
+        peerProtocols = this._peerProtocols[peerId] = new Set()
+      }
+      peerProtocols.add(protocolTag)
+      this._checkProtocolMaxPeersLimit(protocolTag, this._peerCountPerProtocol[protocolTag])
+    })
+  }
+
+  _onPeerDisconnect (peerInfo) {
+    const peerId = peerInfo.id.toB58String()
+    debug('%s: disconnected from %s', this._peerId, peerId)
+    this._peerValues.delete(peerId)
+    this._peers.delete(peerId)
+
+    const peerProtocols = this._peerProtocols[peerId]
+    if (peerProtocols) {
+      Array.from(peerProtocols).forEach((protocolTag) => {
+        const peerCountForProtocol = this._peerCountPerProtocol[protocolTag]
+        if (peerCountForProtocol) {
+          this._peerCountPerProtocol[protocolTag]--
+        }
+      })
+    }
+
+    this.emit('disconnected', peerId)
+  }
+
+  _onLatencyMeasure (summary) {
+    this._checkLimit('maxEventLoopDelay', summary.avgMs)
+  }
+
+  _checkLimit (name, value) {
+    const limit = this._options[name]
+    debug('checking limit of %s. current value: %d of %d', name, value, limit)
+    if (value > limit) {
+      debug('%s: limit exceeded: %s, %d', this._peerId, name, value)
+      this.emit('limit:exceeded', name, value)
+      this._maybeDisconnectOne()
+    }
+  }
+
+  _checkProtocolMaxPeersLimit (protocolTag, value) {
+    debug('checking protocol limit. current value of %s is %d', protocolTag, value)
+    const limit = this._options.maxPeersPerProtocol[protocolTag]
+    if (value > limit) {
+      debug('%s: protocol max peers limit exceeded: %s, %d', this._peerId, protocolTag, value)
+      this.emit('limit:exceeded', protocolTag, value)
+      this._maybeDisconnectOne()
+    }
+  }
+
+  _maybeDisconnectOne () {
+    if (this._options.minPeers < this._peerValues.size) {
+      const peerValues = Array.from(this._peerValues).sort(byPeerValue)
+      debug('%s: sorted peer values: %j', this._peerId, peerValues)
+      const disconnectPeer = peerValues[0]
+      if (disconnectPeer) {
+        const peerId = disconnectPeer[0]
+        debug('%s: lowest value peer is %s', this._peerId, peerId)
+        debug('%s: forcing disconnection from %j', this._peerId, peerId)
+        this._disconnectPeer(peerId)
+      }
+    }
+  }
+
+  _disconnectPeer (peerId) {
+    debug('preemptively disconnecting peer', peerId)
+    this.emit('%s: disconnect:preemptive', this._peerId, peerId)
+    const peer = this._peers.get(peerId)
+    this._libp2p.hangUp(peer, (err) => {
+      if (err) {
+        this.emit('error', err)
+      }
+    })
+  }
+}
+
+module.exports = ConnectionManager
+
+function byPeerValue (peerValueEntryA, peerValueEntryB) {
+  return peerValueEntryA[1] - peerValueEntryB[1]
+}
+
+function fixMaxPeersPerProtocol (maxPeersPerProtocol) {
+  if (!maxPeersPerProtocol) {
+    maxPeersPerProtocol = {}
+  }
+
+  Object.keys(maxPeersPerProtocol).forEach((transportTag) => {
+    const max = maxPeersPerProtocol[transportTag]
+    delete maxPeersPerProtocol[transportTag]
+    maxPeersPerProtocol[transportTag.toLowerCase()] = max
+  })
+
+  return maxPeersPerProtocol
+}
+
+function protocolsFromPeerInfo (peerInfo) {
+  const protocolTags = new Set()
+  peerInfo.multiaddrs.forEach((multiaddr) => {
+    multiaddr.protos().map(protocolToProtocolTag).forEach((protocolTag) => {
+      protocolTags.add(protocolTag)
+    })
+  })
+
+  return Array.from(protocolTags)
+}
+
+function protocolToProtocolTag (protocol) {
+  return protocol.name.toLowerCase()
+}

src/content-routing.js

@@ -3,6 +3,7 @@
 const tryEach = require('async/tryEach')
 const parallel = require('async/parallel')
 const errCode = require('err-code')
+const promisify = require('promisify-es6')
 
 module.exports = (node) => {
   const routers = node._modules.contentRouting || []
@@ -24,7 +25,7 @@ module.exports = (node) => {
      * @param {function(Error, Result<Array>)} callback
      * @returns {void}
      */
-    findProviders: (key, options, callback) => {
+    findProviders: promisify((key, options, callback) => {
       if (typeof options === 'function') {
         callback = options
         options = {}
@@ -60,7 +61,7 @@ module.exports = (node) => {
         results = results || []
         callback(null, results)
       })
-    },
+    }),
 
     /**
      * Iterates over all content routers in parallel to notify it is
@@ -70,7 +71,7 @@ module.exports = (node) => {
      * @param {function(Error)} callback
      * @returns {void}
      */
-    provide: (key, callback) => {
+    provide: promisify((key, callback) => {
       if (!routers.length) {
         return callback(errCode(new Error('No content routers available'), 'NO_ROUTERS_AVAILABLE'))
       }
@@ -78,6 +79,6 @@ module.exports = (node) => {
       parallel(routers.map((router) => {
         return (cb) => router.provide(key, cb)
       }), callback)
-    }
+    })
   }
 }

src/dht.js

@@ -1,37 +1,43 @@
 'use strict'
 
+const nextTick = require('async/nextTick')
+const errCode = require('err-code')
+const promisify = require('promisify-es6')
+
+const { messages, codes } = require('./errors')
+
 module.exports = (node) => {
   return {
-    put: (key, value, callback) => {
+    put: promisify((key, value, callback) => {
       if (!node._dht) {
-        return callback(new Error('DHT is not available'))
+        return nextTick(callback, errCode(new Error(messages.DHT_DISABLED), codes.DHT_DISABLED))
       }
 
       node._dht.put(key, value, callback)
-    },
-    get: (key, options, callback) => {
+    }),
+    get: promisify((key, options, callback) => {
       if (typeof options === 'function') {
         callback = options
         options = {}
       }
 
       if (!node._dht) {
-        return callback(new Error('DHT is not available'))
+        return nextTick(callback, errCode(new Error(messages.DHT_DISABLED), codes.DHT_DISABLED))
       }
 
       node._dht.get(key, options, callback)
-    },
-    getMany: (key, nVals, options, callback) => {
+    }),
+    getMany: promisify((key, nVals, options, callback) => {
       if (typeof options === 'function') {
         callback = options
         options = {}
       }
 
       if (!node._dht) {
-        return callback(new Error('DHT is not available'))
+        return nextTick(callback, errCode(new Error(messages.DHT_DISABLED), codes.DHT_DISABLED))
       }
 
       node._dht.getMany(key, nVals, options, callback)
-    }
+    })
   }
 }

src/error-messages.js

@@ -1,3 +0,0 @@
-'use strict'
-
-exports.NOT_STARTED_YET = 'The libp2p node is not started yet'

src/errors.js

@@ -0,0 +1,13 @@
+'use strict'
+
+exports.messages = {
+  NOT_STARTED_YET: 'The libp2p node is not started yet',
+  DHT_DISABLED: 'DHT is not available'
+}
+
+exports.codes = {
+  DHT_DISABLED: 'ERR_DHT_DISABLED',
+  PUBSUB_NOT_STARTED: 'ERR_PUBSUB_NOT_STARTED',
+  ERR_NODE_NOT_STARTED: 'ERR_NODE_NOT_STARTED',
+  ERR_DISCOVERED_SELF: 'ERR_DISCOVERED_SELF'
+}

src/get-peer-info.js

@@ -5,62 +5,72 @@ const PeerInfo = require('peer-info')
 const multiaddr = require('multiaddr')
 const errCode = require('err-code')
 
-module.exports = (node) => {
-  /*
-   * Helper method to check the data type of peer and convert it to PeerInfo
-   */
-  return function (peer, callback) {
-    let p
-    // PeerInfo
-    if (PeerInfo.isPeerInfo(peer)) {
-      p = peer
-    // Multiaddr instance or Multiaddr String
-    } else if (multiaddr.isMultiaddr(peer) || typeof peer === 'string') {
-      if (typeof peer === 'string') {
-        try {
-          peer = multiaddr(peer)
-        } catch (err) {
-          return callback(
-            errCode(err, 'ERR_INVALID_MULTIADDR')
-          )
-        }
-      }
+/**
+ * Converts the given `peer` to a `PeerInfo` instance.
+ * The `PeerBook` will be checked for the resulting peer, and
+ * the peer will be updated in the `PeerBook`.
+ *
+ * @param {PeerInfo|PeerId|Multiaddr|string} peer
+ * @param {PeerBook} peerBook
+ * @returns {PeerInfo}
+ */
+function getPeerInfo (peer, peerBook) {
+  if (typeof peer === 'string') {
+    peer = multiaddr(peer)
+  }
 
-      const peerIdB58Str = peer.getPeerId()
-
-      if (!peerIdB58Str) {
-        return callback(
-          errCode(
-            new Error('peer multiaddr instance or string must include peerId'),
-            'ERR_INVALID_MULTIADDR'
-          )
-        )
-      }
-
-      try {
-        p = node.peerBook.get(peerIdB58Str)
-      } catch (err) {
-        p = new PeerInfo(PeerId.createFromB58String(peerIdB58Str))
-      }
-      p.multiaddrs.add(peer)
-
-      // PeerId
-    } else if (PeerId.isPeerId(peer)) {
-      const peerIdB58Str = peer.toB58String()
-      try {
-        p = node.peerBook.get(peerIdB58Str)
-      } catch (err) {
-        return node.peerRouting.findPeer(peer, callback)
-      }
-    } else {
-      return callback(
-        errCode(
-          new Error(`${p} is not a valid peer type`),
-          'ERR_INVALID_PEER_TYPE'
-        )
+  let addr
+  if (multiaddr.isMultiaddr(peer)) {
+    addr = peer
+    try {
+      peer = PeerId.createFromB58String(peer.getPeerId())
+    } catch (err) {
+      throw errCode(
+        new Error(`${peer} is not a valid peer type`),
+        'ERR_INVALID_MULTIADDR'
       )
     }
-
-    callback(null, p)
   }
+
+  if (PeerId.isPeerId(peer)) {
+    peer = new PeerInfo(peer)
+  }
+
+  addr && peer.multiaddrs.add(addr)
+
+  return peerBook ? peerBook.put(peer) : peer
+}
+
+/**
+ * If `getPeerInfo` does not return a peer with multiaddrs,
+ * the `libp2p` PeerRouter will be used to attempt to find the peer.
+ *
+ * @async
+ * @param {PeerInfo|PeerId|Multiaddr|string} peer
+ * @param {Libp2p} libp2p
+ * @returns {Promise<PeerInfo>}
+ */
+function getPeerInfoRemote (peer, libp2p) {
+  let peerInfo
+
+  try {
+    peerInfo = getPeerInfo(peer, libp2p.peerBook)
+  } catch (err) {
+    return Promise.reject(errCode(
+      new Error(`${peer} is not a valid peer type`),
+      'ERR_INVALID_PEER_TYPE'
+    ))
+  }
+
+  // If we don't have an address for the peer, attempt to find it
+  if (peerInfo.multiaddrs.size < 1) {
+    return libp2p.peerRouting.findPeer(peerInfo.id)
+  }
+
+  return Promise.resolve(peerInfo)
+}
+
+module.exports = {
+  getPeerInfoRemote,
+  getPeerInfo
 }

src/identify/README.md

@@ -0,0 +1,37 @@
+# js-libp2p-identify
+
+> libp2p Identify Protocol
+
+**Note**: git history prior to merging into js-libp2p can be found in the original repository, https://github.com/libp2p/js-libp2p-identify.
+
+## Description
+
+Identify is a STUN protocol, used by libp2p-swarm in order to broadcast and learn about the `ip:port` pairs a specific peer is available through and to know when a new stream muxer is established, so a conn can be reused.
+
+## How does it work
+
+Best way to understand the current design is through this issue: https://github.com/libp2p/js-libp2p-swarm/issues/78
+
+### This module uses `pull-streams`
+
+We expose a streaming interface based on `pull-streams`, rather then on the Node.js core streams implementation (aka Node.js streams). `pull-streams` offers us a better mechanism for error handling and flow control guarantees. If you would like to know more about why we did this, see the discussion at this [issue](https://github.com/ipfs/js-ipfs/issues/362).
+
+You can learn more about pull-streams at:
+
+- [The history of Node.js streams, nodebp April 2014](https://www.youtube.com/watch?v=g5ewQEuXjsQ)
+- [The history of streams, 2016](http://dominictarr.com/post/145135293917/history-of-streams)
+- [pull-streams, the simple streaming primitive](http://dominictarr.com/post/149248845122/pull-streams-pull-streams-are-a-very-simple)
+- [pull-streams documentation](https://pull-stream.github.io/)
+
+#### Converting `pull-streams` to Node.js Streams
+
+If you are a Node.js streams user, you can convert a pull-stream to a Node.js stream using the module [`pull-stream-to-stream`](https://github.com/pull-stream/pull-stream-to-stream), giving you an instance of a Node.js stream that is linked to the pull-stream. For example:
+
+```js
+const pullToStream = require('pull-stream-to-stream')
+
+const nodeStreamInstance = pullToStream(pullStreamInstance)
+// nodeStreamInstance is an instance of a Node.js Stream
+```
+
+To learn more about this utility, visit https://pull-stream.github.io/#pull-stream-to-stream.

src/identify/dialer.js

@@ -0,0 +1,87 @@
+'use strict'
+const PeerInfo = require('peer-info')
+const PeerId = require('peer-id')
+const multiaddr = require('multiaddr')
+const pull = require('pull-stream/pull')
+const take = require('pull-stream/throughs/take')
+const collect = require('pull-stream/sinks/collect')
+const lp = require('pull-length-prefixed')
+
+const msg = require('./message')
+
+module.exports = (conn, expectedPeerInfo, callback) => {
+  if (typeof expectedPeerInfo === 'function') {
+    callback = expectedPeerInfo
+    expectedPeerInfo = null
+    // eslint-disable-next-line no-console
+    console.warn('WARNING: no expected peer info was given, identify will not be able to verify peer integrity')
+  }
+
+  pull(
+    conn,
+    lp.decode(),
+    take(1),
+    collect((err, data) => {
+      if (err) {
+        return callback(err)
+      }
+
+      // connection got closed graciously
+      if (data.length === 0) {
+        return callback(new Error('conn was closed, did not receive data'))
+      }
+
+      const input = msg.decode(data[0])
+
+      PeerId.createFromPubKey(input.publicKey, (err, id) => {
+        if (err) {
+          return callback(err)
+        }
+
+        const peerInfo = new PeerInfo(id)
+        if (expectedPeerInfo && expectedPeerInfo.id.toB58String() !== id.toB58String()) {
+          return callback(new Error('invalid peer'))
+        }
+
+        try {
+          input.listenAddrs
+            .map(multiaddr)
+            .forEach((ma) => peerInfo.multiaddrs.add(ma))
+        } catch (err) {
+          return callback(err)
+        }
+
+        let observedAddr
+
+        try {
+          observedAddr = getObservedAddrs(input)
+        } catch (err) {
+          return callback(err)
+        }
+
+        // Copy the protocols
+        peerInfo.protocols = new Set(input.protocols)
+
+        callback(null, peerInfo, observedAddr)
+      })
+    })
+  )
+}
+
+function getObservedAddrs (input) {
+  if (!hasObservedAddr(input)) {
+    return []
+  }
+
+  let addrs = input.observedAddr
+
+  if (!Array.isArray(addrs)) {
+    addrs = [addrs]
+  }
+
+  return addrs.map((oa) => multiaddr(oa))
+}
+
+function hasObservedAddr (input) {
+  return input.observedAddr && input.observedAddr.length > 0
+}

src/identify/index.js

@@ -0,0 +1,7 @@
+'use strict'
+
+exports = module.exports
+exports.multicodec = '/ipfs/id/1.0.0'
+exports.listener = require('./listener')
+exports.dialer = require('./dialer')
+exports.message = require('./message')

src/identify/listener.js

@@ -0,0 +1,35 @@
+'use strict'
+
+const pull = require('pull-stream/pull')
+const values = require('pull-stream/sources/values')
+const lp = require('pull-length-prefixed')
+
+const msg = require('./message')
+
+module.exports = (conn, pInfoSelf) => {
+  // send what I see from the other + my Info
+  conn.getObservedAddrs((err, observedAddrs) => {
+    if (err) { return }
+    observedAddrs = observedAddrs[0]
+
+    let publicKey = Buffer.alloc(0)
+    if (pInfoSelf.id.pubKey) {
+      publicKey = pInfoSelf.id.pubKey.bytes
+    }
+
+    const msgSend = msg.encode({
+      protocolVersion: 'ipfs/0.1.0',
+      agentVersion: 'na',
+      publicKey: publicKey,
+      listenAddrs: pInfoSelf.multiaddrs.toArray().map((ma) => ma.buffer),
+      observedAddr: observedAddrs ? observedAddrs.buffer : Buffer.from(''),
+      protocols: Array.from(pInfoSelf.protocols)
+    })
+
+    pull(
+      values([msgSend]),
+      lp.encode(),
+      conn
+    )
+  })
+}

src/identify/message.js

@@ -0,0 +1,30 @@
+'use strict'
+
+const protons = require('protons')
+const schema = `
+message Identify {
+  // protocolVersion determines compatibility between peers
+  optional string protocolVersion = 5; // e.g. ipfs/1.0.0
+
+  // agentVersion is like a UserAgent string in browsers, or client version in bittorrent
+  // includes the client name and client.
+  optional string agentVersion = 6; // e.g. go-ipfs/0.1.0
+
+  // publicKey is this node's public key (which also gives its node.ID)
+  // - may not need to be sent, as secure channel implies it has been sent.
+  // - then again, if we change / disable secure channel, may still want it.
+  optional bytes publicKey = 1;
+
+  // listenAddrs are the multiaddrs the sender node listens for open connections on
+  repeated bytes listenAddrs = 2;
+
+  // oservedAddr is the multiaddr of the remote endpoint that the sender node perceives
+  // this is useful information to convey to the other side, as it helps the remote endpoint
+  // determine whether its connection to the local peer goes through NAT.
+  optional bytes observedAddr = 4;
+
+  repeated string protocols = 3;
+}
+`
+
+module.exports = protons(schema).Identify

src/index.js

@@ -2,65 +2,74 @@
 
 const FSM = require('fsm-event')
 const EventEmitter = require('events').EventEmitter
-const assert = require('assert')
 const debug = require('debug')
 const log = debug('libp2p')
 log.error = debug('libp2p:error')
+const errCode = require('err-code')
+const promisify = require('promisify-es6')
 
 const each = require('async/each')
 const series = require('async/series')
 const parallel = require('async/parallel')
+const nextTick = require('async/nextTick')
 
 const PeerBook = require('peer-book')
-const Switch = require('libp2p-switch')
-const Ping = require('libp2p-ping')
+const PeerInfo = require('peer-info')
+const Switch = require('./switch')
+const Ping = require('./ping')
 const WebSockets = require('libp2p-websockets')
-const ConnectionManager = require('libp2p-connection-manager')
+const ConnectionManager = require('./connection-manager')
 
+const { emitFirst } = require('./util')
 const peerRouting = require('./peer-routing')
 const contentRouting = require('./content-routing')
 const dht = require('./dht')
 const pubsub = require('./pubsub')
-const getPeerInfo = require('./get-peer-info')
+const { getPeerInfoRemote } = require('./get-peer-info')
 const validateConfig = require('./config').validate
+const { codes } = require('./errors')
 
-const NOT_STARTED_ERROR_MESSAGE = 'The libp2p node is not started yet'
+const notStarted = (action, state) => {
+  return errCode(
+    new Error(`libp2p cannot ${action} when not started; state is ${state}`),
+    codes.ERR_NODE_NOT_STARTED
+  )
+}
 
 /**
- * @fires Node#error Emitted when an error occurs
- * @fires Node#peer:connect Emitted when a peer is connected to this node
- * @fires Node#peer:disconnect Emitted when a peer disconnects from this node
- * @fires Node#peer:discovery Emitted when a peer is discovered
- * @fires Node#start Emitted when the node and its services has started
- * @fires Node#stop Emitted when the node and its services has stopped
+ * @fires Libp2p#error Emitted when an error occurs
+ * @fires Libp2p#peer:connect Emitted when a peer is connected to this node
+ * @fires Libp2p#peer:disconnect Emitted when a peer disconnects from this node
+ * @fires Libp2p#peer:discovery Emitted when a peer is discovered
+ * @fires Libp2p#start Emitted when the node and its services has started
+ * @fires Libp2p#stop Emitted when the node and its services has stopped
  */
-class Node extends EventEmitter {
+class Libp2p extends EventEmitter {
   constructor (_options) {
     super()
     // validateConfig will ensure the config is correct,
     // and add default values where appropriate
-    _options = validateConfig(_options)
+    this._options = validateConfig(_options)
 
-    this.datastore = _options.datastore
-    this.peerInfo = _options.peerInfo
-    this.peerBook = _options.peerBook || new PeerBook()
+    this.datastore = this._options.datastore
+    this.peerInfo = this._options.peerInfo
+    this.peerBook = this._options.peerBook || new PeerBook()
 
-    this._modules = _options.modules
-    this._config = _options.config
-    this._isStarted = false
+    this._modules = this._options.modules
+    this._config = this._options.config
     this._transport = [] // Transport instances/references
     this._discovery = [] // Discovery service instances/references
 
     // create the switch, and listen for errors
-    this._switch = new Switch(this.peerInfo, this.peerBook, _options.switch)
+    this._switch = new Switch(this.peerInfo, this.peerBook, this._options.switch)
     this._switch.on('error', (...args) => this.emit('error', ...args))
 
     this.stats = this._switch.stats
-    this.connectionManager = new ConnectionManager(this, _options.connectionManager)
+    this.connectionManager = new ConnectionManager(this, this._options.connectionManager)
 
     // Attach stream multiplexers
     if (this._modules.streamMuxer) {
-      let muxers = this._modules.streamMuxer
+      const muxers = this._modules.streamMuxer
       muxers.forEach((muxer) => this._switch.connection.addStreamMuxer(muxer))
 
       // If muxer exists
@@ -73,7 +82,6 @@ class Node extends EventEmitter {
       // reuse this muxed connection
       this._switch.on('peer-mux-established', (peerInfo) => {
         this.emit('peer:connect', peerInfo)
-        this.peerBook.put(peerInfo)
       })
 
       this._switch.on('peer-mux-closed', (peerInfo) => {
@@ -81,9 +89,17 @@ class Node extends EventEmitter {
       })
     }
 
+    // Events for anytime connections are created/removed
+    this._switch.on('connection:start', (peerInfo) => {
+      this.emit('connection:start', peerInfo)
+    })
+    this._switch.on('connection:end', (peerInfo) => {
+      this.emit('connection:end', peerInfo)
+    })
+
     // Attach crypto channels
     if (this._modules.connEncryption) {
-      let cryptos = this._modules.connEncryption
+      const cryptos = this._modules.connEncryption
       cryptos.forEach((crypto) => {
         this._switch.connection.crypto(crypto.tag, crypto.encrypt)
       })
@@ -97,22 +113,18 @@ class Node extends EventEmitter {
     }
 
     // dht provided components (peerRouting, contentRouting, dht)
-    if (this._config.EXPERIMENTAL.dht) {
+    if (this._config.dht.enabled) {
       const DHT = this._modules.dht
-      const enabledDiscovery = this._config.dht.enabledDiscovery !== false
 
       this._dht = new DHT(this._switch, {
-        kBucketSize: this._config.dht.kBucketSize,
-        enabledDiscovery,
         datastore: this.datastore,
-        validators: this._config.dht.validators,
-        selectors: this._config.dht.selectors
+        ...this._config.dht
       })
     }
 
-    // enable/disable pubsub
-    if (this._config.EXPERIMENTAL.pubsub) {
-      this.pubsub = pubsub(this)
+    // start pubsub
+    if (this._modules.pubsub && this._config.pubsub.enabled !== false) {
+      this.pubsub = pubsub(this, this._modules.pubsub, this._config.pubsub)
     }
 
     // Attach remaining APIs
@@ -121,8 +133,6 @@ class Node extends EventEmitter {
     this.contentRouting = contentRouting(this)
     this.dht = dht(this)
 
-    this._getPeerInfo = getPeerInfo(this)
-
     // Mount default protocols
     Ping.mount(this._switch)
 
@@ -165,6 +175,21 @@ class Node extends EventEmitter {
       log.error(err)
       this.emit('error', err)
     })
+
+    // Once we start, emit and dial any peers we may have already discovered
+    this.state.on('STARTED', () => {
+      this.peerBook.getAllArray().forEach((peerInfo) => {
+        this.emit('peer:discovery', peerInfo)
+        this._maybeConnect(peerInfo)
+      })
+    })
+
+    this._peerDiscovered = this._peerDiscovered.bind(this)
+
+    // promisify all instance methods
+    ;['start', 'stop', 'dial', 'dialProtocol', 'dialFSM', 'hangUp', 'ping'].forEach(method => {
+      this[method] = promisify(this[method], { context: this })
+    })
   }
 
   /**
@@ -189,7 +214,7 @@ class Node extends EventEmitter {
    * @returns {void}
    */
   start (callback = () => {}) {
-    this.once('start', callback)
+    emitFirst(this, ['error', 'start'], callback)
     this.state('start')
   }
 
@@ -200,7 +225,7 @@ class Node extends EventEmitter {
    * @returns {void}
    */
   stop (callback = () => {}) {
-    this.once('stop', callback)
+    emitFirst(this, ['error', 'stop'], callback)
     this.state('stop')
   }
 
@@ -217,8 +242,6 @@ class Node extends EventEmitter {
    * @returns {void}
    */
   dial (peer, callback) {
-    assert(this.isStarted(), NOT_STARTED_ERROR_MESSAGE)
-
     this.dialProtocol(peer, null, callback)
   }
 
@@ -233,22 +256,19 @@ class Node extends EventEmitter {
    * @returns {void}
    */
   dialProtocol (peer, protocol, callback) {
-    assert(this.isStarted(), NOT_STARTED_ERROR_MESSAGE)
+    if (!this.isStarted()) {
+      return callback(notStarted('dial', this.state._state))
+    }
 
     if (typeof protocol === 'function') {
       callback = protocol
       protocol = undefined
     }
 
-    this._getPeerInfo(peer, (err, peerInfo) => {
-      if (err) { return callback(err) }
-
-      this._switch.dial(peerInfo, protocol, (err, conn) => {
-        if (err) { return callback(err) }
-        this.peerBook.put(peerInfo)
-        callback(null, conn)
-      })
-    })
+    getPeerInfoRemote(peer, this)
+      .then(peerInfo => {
+        this._switch.dial(peerInfo, protocol, callback)
+      }, callback)
   }
 
   /**
@@ -261,46 +281,51 @@ class Node extends EventEmitter {
    * @returns {void}
    */
   dialFSM (peer, protocol, callback) {
-    assert(this.isStarted(), NOT_STARTED_ERROR_MESSAGE)
+    if (!this.isStarted()) {
+      return callback(notStarted('dial', this.state._state))
+    }
 
     if (typeof protocol === 'function') {
       callback = protocol
       protocol = undefined
     }
 
-    this._getPeerInfo(peer, (err, peerInfo) => {
-      if (err) { return callback(err) }
-
-      const connFSM = this._switch.dialFSM(peerInfo, protocol, (err) => {
-        if (!err) {
-          this.peerBook.put(peerInfo)
-        }
-      })
-
-      callback(null, connFSM)
-    })
+    getPeerInfoRemote(peer, this)
+      .then(peerInfo => {
+        this._switch.dialFSM(peerInfo, protocol, callback)
+      }, callback)
   }
 
+  /**
+   * Disconnects from the given peer
+   *
+   * @param {PeerInfo|PeerId|Multiaddr|string} peer The peer to ping
+   * @param {function(Error)} callback
+   * @returns {void}
+   */
   hangUp (peer, callback) {
-    assert(this.isStarted(), NOT_STARTED_ERROR_MESSAGE)
-
-    this._getPeerInfo(peer, (err, peerInfo) => {
-      if (err) { return callback(err) }
-
-      this._switch.hangUp(peerInfo, callback)
-    })
+    getPeerInfoRemote(peer, this)
+      .then(peerInfo => {
+        this._switch.hangUp(peerInfo, callback)
+      }, callback)
   }
 
+  /**
+   * Pings the provided peer
+   *
+   * @param {PeerInfo|PeerId|Multiaddr|string} peer The peer to ping
+   * @param {function(Error, Ping)} callback
+   * @returns {void}
+   */
   ping (peer, callback) {
     if (!this.isStarted()) {
-      return callback(new Error(NOT_STARTED_ERROR_MESSAGE))
+      return callback(notStarted('ping', this.state._state))
     }
 
-    this._getPeerInfo(peer, (err, peerInfo) => {
-      if (err) { return callback(err) }
-
-      callback(null, new Ping(this._switch, peerInfo))
-    })
+    getPeerInfoRemote(peer, this)
+      .then(peerInfo => {
+        callback(null, new Ping(this._switch, peerInfo))
+      }, callback)
   }
 
   handle (protocol, handlerFunc, matchFunc) {
@@ -325,7 +350,7 @@ class Node extends EventEmitter {
     this.peerInfo.multiaddrs.toArray().forEach((ma) => {
       if (!ma.getPeerId()) {
         maOld.push(ma)
-        maNew.push(ma.encapsulate('/ipfs/' + this.peerInfo.id.toB58String()))
+        maNew.push(ma.encapsulate('/p2p/' + this.peerInfo.id.toB58String()))
       }
     })
     this.peerInfo.multiaddrs.replace(maOld, maNew)
@@ -336,7 +361,7 @@ class Node extends EventEmitter {
       let t
 
       if (typeof Transport === 'function') {
-        t = new Transport()
+        t = new Transport({ libp2p: this })
       } else {
         t = Transport
       }
@@ -362,60 +387,6 @@ class Node extends EventEmitter {
           this._switch.transport.add(ws.tag || ws.constructor.name, ws)
         }
 
-        // all transports need to be setup before discover starts
-        if (this._modules.peerDiscovery) {
-          each(this._modules.peerDiscovery, (D, _cb) => {
-            let config = {}
-
-            if (D.tag &&
-              this._config.peerDiscovery &&
-              this._config.peerDiscovery[D.tag]) {
-              config = this._config.peerDiscovery[D.tag]
-            }
-
-            // If not configured to be enabled/disabled then enable by default
-            const enabled = config.enabled == null ? true : config.enabled
-
-            // If enabled then start it
-            if (enabled) {
-              let d
-
-              if (typeof D === 'function') {
-                d = new D(Object.assign({}, config, { peerInfo: this.peerInfo }))
-              } else {
-                d = D
-              }
-
-              d.on('peer', (peerInfo) => this.emit('peer:discovery', peerInfo))
-              this._discovery.push(d)
-              d.start(_cb)
-            } else {
-              _cb()
-            }
-          }, cb)
-        } else {
-          cb()
-        }
-      },
-      (cb) => {
-        // TODO: chicken-and-egg problem #1:
-        // have to set started here because DHT requires libp2p is already started
-        this._isStarted = true
-        if (this._dht) {
-          this._dht.start(cb)
-        } else {
-          cb()
-        }
-      },
-      (cb) => {
-        // TODO: chicken-and-egg problem #2:
-        // have to set started here because FloodSub requires libp2p is already started
-        if (this._floodSub) {
-          return this._floodSub.start(cb)
-        }
-        cb()
-      },
-      (cb) => {
         // detect which multiaddrs we don't have a transport for and remove them
         const multiaddrs = this.peerInfo.multiaddrs.toArray()
 
@@ -426,6 +397,30 @@ class Node extends EventEmitter {
           }
         })
         cb()
+      },
+      (cb) => {
+        if (this._dht) {
+          this._dht.start(() => {
+            this._dht.on('peer', this._peerDiscovered)
+            cb()
+          })
+        } else {
+          cb()
+        }
+      },
+      (cb) => {
+        if (this.pubsub) {
+          return this.pubsub.start(cb)
+        }
+        cb()
+      },
+      // Peer Discovery
+      (cb) => {
+        if (this._modules.peerDiscovery) {
+          this._setupPeerDiscovery(cb)
+        } else {
+          cb()
+        }
       }
     ], (err) => {
       if (err) {
@@ -440,36 +435,39 @@ class Node extends EventEmitter {
   _onStopping () {
     series([
       (cb) => {
-        if (this._modules.peerDiscovery) {
-          // stop all discoveries before continuing with shutdown
-          return parallel(
-            this._discovery.map((d) => {
-              return (_cb) => d.stop(() => { _cb() })
-            }),
-            cb
-          )
-        }
-        cb()
+        // stop all discoveries before continuing with shutdown
+        parallel(
+          this._discovery.map((d) => {
+            d.removeListener('peer', this._peerDiscovered)
+            return (_cb) => d.stop((err) => {
+              log.error('an error occurred stopping the discovery service', err)
+              _cb()
+            })
+          }),
+          cb
+        )
       },
       (cb) => {
-        if (this._floodSub) {
-          return this._floodSub.stop(cb)
+        if (this.pubsub) {
+          return this.pubsub.stop(cb)
         }
         cb()
       },
       (cb) => {
         if (this._dht) {
+          this._dht.removeListener('peer', this._peerDiscovered)
           return this._dht.stop(cb)
         }
         cb()
       },
-      (cb) => {
-        // Ensures idempotency for restarts
-        this._switch.transport.removeAll(cb)
-      },
       (cb) => {
         this.connectionManager.stop()
         this._switch.stop(cb)
+      },
+      (cb) => {
+        // Ensures idempotent restarts, ignore any errors
+        // from removeAll, they're not useful at this point
+        this._switch.transport.removeAll(() => cb())
       }
     ], (err) => {
       if (err) {
@@ -479,6 +477,107 @@ class Node extends EventEmitter {
       this.state('done')
     })
   }
+
+  /**
+   * Handles discovered peers. Each discovered peer will be emitted via
+   * the `peer:discovery` event. If auto dial is enabled for libp2p
+   * and the current connection count is under the low watermark, the
+   * peer will be dialed.
+   *
+   * TODO: If `peerBook.put` becomes centralized, https://github.com/libp2p/js-libp2p/issues/345,
+   * it would be ideal if only new peers were emitted. Currently, with
+   * other modules adding peers to the `PeerBook` we have no way of knowing
+   * if a peer is new or not, so it has to be emitted.
+   *
+   * @private
+   * @param {PeerInfo} peerInfo
+   */
+  _peerDiscovered (peerInfo) {
+    if (peerInfo.id.toB58String() === this.peerInfo.id.toB58String()) {
+      log.error(new Error(codes.ERR_DISCOVERED_SELF))
+      return
+    }
+    peerInfo = this.peerBook.put(peerInfo)
+
+    if (!this.isStarted()) return
+
+    this.emit('peer:discovery', peerInfo)
+    this._maybeConnect(peerInfo)
+  }
+
+  /**
+   * Will dial to the given `peerInfo` if the current number of
+   * connected peers is less than the configured `ConnectionManager`
+   * minPeers.
+   * @private
+   * @param {PeerInfo} peerInfo
+   */
+  _maybeConnect (peerInfo) {
+    // If auto dialing is on, check if we should dial
+    if (this._config.peerDiscovery.autoDial === true && !peerInfo.isConnected()) {
+      const minPeers = this._options.connectionManager.minPeers || 0
+      if (minPeers > Object.keys(this._switch.connection.connections).length) {
+        log('connecting to discovered peer')
+        this._switch.dialer.connect(peerInfo, (err) => {
+          err && log.error('could not connect to discovered peer', err)
+        })
+      }
+    }
+  }
+
+  /**
+   * Initializes and starts peer discovery services
+   *
+   * @private
+   * @param {function(Error)} callback
+   */
+  _setupPeerDiscovery (callback) {
+    for (const DiscoveryService of this._modules.peerDiscovery) {
+      let config = {
+        enabled: true // on by default
+      }
+
+      if (DiscoveryService.tag &&
+        this._config.peerDiscovery &&
+        this._config.peerDiscovery[DiscoveryService.tag]) {
+        config = { ...config, ...this._config.peerDiscovery[DiscoveryService.tag] }
+      }
+
+      if (config.enabled) {
+        let discoveryService
+
+        if (typeof DiscoveryService === 'function') {
+          discoveryService = new DiscoveryService(Object.assign({}, config, { peerInfo: this.peerInfo }))
+        } else {
+          discoveryService = DiscoveryService
+        }
+
+        discoveryService.on('peer', this._peerDiscovered)
+        this._discovery.push(discoveryService)
+      }
+    }
+
+    each(this._discovery, (d, cb) => {
+      d.start(cb)
+    }, callback)
+  }
 }
 
-module.exports = Node
+module.exports = Libp2p
+/**
+ * Like `new Libp2p(options)` except it will create a `PeerInfo`
+ * instance if one is not provided in options.
+ * @param {object} options Libp2p configuration options
+ * @param {function(Error, Libp2p)} callback
+ * @returns {void}
+ */
+module.exports.createLibp2p = promisify((options, callback) => {
+  if (options.peerInfo) {
+    return nextTick(callback, null, new Libp2p(options))
+  }
+  PeerInfo.create((err, peerInfo) => {
+    if (err) return callback(err)
+    options.peerInfo = peerInfo
+    callback(null, new Libp2p(options))
+  })
+})

src/peer-routing.js

@@ -2,6 +2,7 @@
 
 const tryEach = require('async/tryEach')
 const errCode = require('err-code')
+const promisify = require('promisify-es6')
 
 module.exports = (node) => {
   const routers = node._modules.peerRouting || []
@@ -21,7 +22,7 @@ module.exports = (node) => {
      * @param {function(Error, Result<Array>)} callback
      * @returns {void}
      */
-    findPeer: (id, options, callback) => {
+    findPeer: promisify((id, options, callback) => {
       if (typeof options === 'function') {
         callback = options
         options = {}
@@ -47,12 +48,12 @@ module.exports = (node) => {
       })
 
       tryEach(tasks, (err, results) => {
-        if (err && err.code !== 'NOT_FOUND') {
+        if (err) {
           return callback(err)
         }
         results = results || []
         callback(null, results)
       })
-    }
+    })
   }
 }

src/ping/README.md

@@ -0,0 +1,23 @@
+libp2p-ping JavaScript Implementation
+=====================================
+
+> IPFS ping protocol JavaScript implementation
+
+**Note**: git history prior to merging into js-libp2p can be found in the original repository, https://github.com/libp2p/js-libp2p-ping.
+
+## Usage
+
+```javascript
+var Ping = require('libp2p-ping')
+
+Ping.mount(swarm) // Enable this peer to echo Ping requests
+
+var p = new Ping(swarm, peerDst) // Ping peerDst, peerDst must be a peer-info object
+
+p.on('ping', function (time) {
+  console.log(time + 'ms')
+  p.stop() // stop sending pings
+})
+
+p.start()
+```

src/ping/constants.js

@@ -0,0 +1,6 @@
+'use strict'
+
+module.exports = {
+  PROTOCOL: '/ipfs/ping/1.0.0',
+  PING_LENGTH: 32
+}

src/ping/handler.js

@@ -0,0 +1,50 @@
+'use strict'
+
+const pull = require('pull-stream/pull')
+const handshake = require('pull-handshake')
+const constants = require('./constants')
+const PROTOCOL = constants.PROTOCOL
+const PING_LENGTH = constants.PING_LENGTH
+
+const debug = require('debug')
+const log = debug('libp2p-ping')
+log.error = debug('libp2p-ping:error')
+
+function mount (swarm) {
+  swarm.handle(PROTOCOL, (protocol, conn) => {
+    const stream = handshake({ timeout: 0 })
+    const shake = stream.handshake
+
+    // receive and echo back
+    function next () {
+      shake.read(PING_LENGTH, (err, buf) => {
+        if (err === true) {
+          // stream closed
+          return
+        }
+        if (err) {
+          return log.error(err)
+        }
+
+        shake.write(buf)
+        return next()
+      })
+    }
+
+    pull(
+      conn,
+      stream,
+      conn
+    )
+
+    next()
+  })
+}
+
+function unmount (swarm) {
+  swarm.unhandle(PROTOCOL)
+}
+
+exports = module.exports
+exports.mount = mount
+exports.unmount = unmount

src/ping/index.js

@@ -0,0 +1,7 @@
+'use strict'
+
+const handler = require('./handler')
+
+exports = module.exports = require('./ping')
+exports.mount = handler.mount
+exports.unmount = handler.unmount

src/ping/ping.js

@@ -0,0 +1,83 @@
+'use strict'
+
+const EventEmitter = require('events').EventEmitter
+const pull = require('pull-stream/pull')
+const empty = require('pull-stream/sources/empty')
+const handshake = require('pull-handshake')
+const constants = require('./constants')
+const util = require('./util')
+const rnd = util.rnd
+const debug = require('debug')
+const log = debug('libp2p-ping')
+log.error = debug('libp2p-ping:error')
+
+const PROTOCOL = constants.PROTOCOL
+const PING_LENGTH = constants.PING_LENGTH
+
+class Ping extends EventEmitter {
+  constructor (swarm, peer) {
+    super()
+
+    this._stopped = false
+    this.peer = peer
+    this.swarm = swarm
+  }
+
+  start () {
+    log('dialing %s to %s', PROTOCOL, this.peer.id.toB58String())
+
+    this.swarm.dial(this.peer, PROTOCOL, (err, conn) => {
+      if (err) {
+        return this.emit('error', err)
+      }
+
+      const stream = handshake({ timeout: 0 })
+      this.shake = stream.handshake
+
+      pull(
+        stream,
+        conn,
+        stream
+      )
+
+      // write and wait to see ping back
+      const self = this
+      function next () {
+        const start = new Date()
+        const buf = rnd(PING_LENGTH)
+        self.shake.write(buf)
+        self.shake.read(PING_LENGTH, (err, bufBack) => {
+          const end = new Date()
+          if (err || !buf.equals(bufBack)) {
+            const err = new Error('Received wrong ping ack')
+            return self.emit('error', err)
+          }
+
+          self.emit('ping', end - start)
+
+          if (self._stopped) {
+            return
+          }
+          next()
+        })
+      }
+
+      next()
+    })
+  }
+
+  stop () {
+    if (this._stopped || !this.shake) {
+      return
+    }
+
+    this._stopped = true
+
+    pull(
+      empty(),
+      this.shake.rest()
+    )
+  }
+}
+
+module.exports = Ping

src/ping/util.js

@@ -0,0 +1,13 @@
+'use strict'
+
+const crypto = require('libp2p-crypto')
+const constants = require('./constants')
+
+exports = module.exports
+
+exports.rnd = (length) => {
+  if (!length) {
+    length = constants.PING_LENGTH
+  }
+  return crypto.randomBytes(length)
+}

src/pnet/README.md

@@ -0,0 +1,67 @@
+js-libp2p-pnet
+==================
+
+> Connection protection management for libp2p leveraging PSK encryption via XSalsa20.
+
+**Note**: git history prior to merging into js-libp2p can be found in the original repository, https://github.com/libp2p/js-libp2p-pnet.
+
+## Table of Contents
+
+- [Usage](#usage)
+  - [Examples](#examples)
+  - [Private Shared Keys (PSK)](#private-shared-keys)
+  - [PSK Generation](#psk-generation)
+- [Contribute](#contribute)
+- [License](#license)
+
+## Usage
+
+```js
+const Protector = require('libp2p-pnet')
+const protector = new Protector(swarmKeyBuffer)
+const privateConnection = protector.protect(myPublicConnection, (err) => { })
+```
+
+### Examples
+[Private Networks with IPFS](./examples/pnet-ipfs)
+
+### Private Shared Keys
+
+Private Shared Keys are expected to be in the following format:
+
+```
+/key/swarm/psk/1.0.0/
+/base16/
+dffb7e3135399a8b1612b2aaca1c36a3a8ac2cd0cca51ceeb2ced87d308cac6d
+```
+
+### PSK Generation
+
+A utility method has been created to generate a key for your private network. You can
+use one of the methods below to generate your key.
+
+#### From libp2p-pnet
+
+If you have libp2p-pnet locally, you can run the following from the projects root.
+
+```sh
+node ./key-generator.js > swarm.key
+```
+
+#### From a module using libp2p
+
+If you have a module locally that depends on libp2p-pnet, you can run the following from
+that project, assuming the node_modules are installed.
+
+```sh
+node -e "require('libp2p-pnet').generate(process.stdout)" > swarm.key
+```
+
+#### Programmatically
+
+```js
+const writeKey = require('libp2p-pnet').generate
+const swarmKey = Buffer.alloc(95)
+writeKey(swarmKey)
+fs.writeFileSync('swarm.key', swarmKey)
+```

src/pnet/crypto.js

@@ -0,0 +1,98 @@
+'use strict'
+
+const pull = require('pull-stream')
+const debug = require('debug')
+const Errors = require('./errors')
+const xsalsa20 = require('xsalsa20')
+const KEY_LENGTH = require('./key-generator').KEY_LENGTH
+
+const log = debug('libp2p:pnet')
+log.trace = debug('libp2p:pnet:trace')
+log.err = debug('libp2p:pnet:err')
+
+/**
+ * Creates a pull stream to encrypt messages in a private network
+ *
+ * @param {Buffer} nonce The nonce to use in encryption
+ * @param {Buffer} psk The private shared key to use in encryption
+ * @returns {PullStream} a through stream
+ */
+module.exports.createBoxStream = (nonce, psk) => {
+  const xor = xsalsa20(nonce, psk)
+  return pull(
+    ensureBuffer(),
+    pull.map((chunk) => {
+      return xor.update(chunk, chunk)
+    })
+  )
+}
+
+/**
+ * Creates a pull stream to decrypt messages in a private network
+ *
+ * @param {Object} remote Holds the nonce of the peer
+ * @param {Buffer} psk The private shared key to use in decryption
+ * @returns {PullStream} a through stream
+ */
+module.exports.createUnboxStream = (remote, psk) => {
+  let xor
+  return pull(
+    ensureBuffer(),
+    pull.map((chunk) => {
+      if (!xor) {
+        xor = xsalsa20(remote.nonce, psk)
+        log.trace('Decryption enabled')
+      }
+
+      return xor.update(chunk, chunk)
+    })
+  )
+}
+
+/**
+ * Decode the version 1 psk from the given Buffer
+ *
+ * @param {Buffer} pskBuffer
+ * @throws {INVALID_PSK}
+ * @returns {Object} The PSK metadata (tag, codecName, psk)
+ */
+module.exports.decodeV1PSK = (pskBuffer) => {
+  try {
+    // This should pull from multibase/multicodec to allow for
+    // more encoding flexibility. Ideally we'd consume the codecs
+    // from the buffer line by line to evaluate the next line
+    // programatically instead of making assumptions about the
+    // encodings of each line.
+    const metadata = pskBuffer.toString().split(/(?:\r\n|\r|\n)/g)
+    const pskTag = metadata.shift()
+    const codec = metadata.shift()
+    const psk = Buffer.from(metadata.shift(), 'hex')
+
+    if (psk.byteLength !== KEY_LENGTH) {
+      throw new Error(Errors.INVALID_PSK)
+    }
+
+    return {
+      tag: pskTag,
+      codecName: codec,
+      psk: psk
+    }
+  } catch (err) {
+    throw new Error(Errors.INVALID_PSK)
+  }
+}
+
+/**
+ * Returns a through pull-stream that ensures the passed chunks
+ * are buffers instead of strings
+ * @returns {PullStream} a through stream
+ */
+function ensureBuffer () {
+  return pull.map((chunk) => {
+    if (typeof chunk === 'string') {
+      return Buffer.from(chunk, 'utf-8')
+    }
+
+    return chunk
+  })
+}

src/pnet/errors.js

@@ -0,0 +1,7 @@
+'use strict'
+
+module.exports.INVALID_PEER = 'Not a valid peer connection'
+module.exports.INVALID_PSK = 'Your private shared key is invalid'
+module.exports.NO_LOCAL_ID = 'No local private key provided'
+module.exports.NO_HANDSHAKE_CONNECTION = 'No connection for the handshake provided'
+module.exports.STREAM_ENDED = 'Stream ended prematurely'

src/pnet/index.js

@@ -0,0 +1,70 @@
+'use strict'
+
+const pull = require('pull-stream')
+const Connection = require('interface-connection').Connection
+const assert = require('assert')
+
+const Errors = require('./errors')
+const State = require('./state')
+const decodeV1PSK = require('./crypto').decodeV1PSK
+const debug = require('debug')
+const log = debug('libp2p:pnet')
+log.err = debug('libp2p:pnet:err')
+
+/**
+ * Takes a Private Shared Key (psk) and provides a `protect` method
+ * for wrapping existing connections in a private encryption stream
+ */
+class Protector {
+  /**
+   * @param {Buffer} keyBuffer The private shared key buffer
+   * @constructor
+   */
+  constructor (keyBuffer) {
+    const decodedPSK = decodeV1PSK(keyBuffer)
+    this.psk = decodedPSK.psk
+    this.tag = decodedPSK.tag
+  }
+
+  /**
+   * Takes a given Connection and creates a privaste encryption stream
+   * between its two peers from the PSK the Protector instance was
+   * created with.
+   *
+   * @param {Connection} connection The connection to protect
+   * @param {function(Error)} callback
+   * @returns {Connection} The protected connection
+   */
+  protect (connection, callback) {
+    assert(connection, Errors.NO_HANDSHAKE_CONNECTION)
+
+    const protectedConnection = new Connection(undefined, connection)
+    const state = new State(this.psk)
+
+    log('protecting the connection')
+
+    // Run the connection through an encryptor
+    pull(
+      connection,
+      state.encrypt((err, encryptedOuterStream) => {
+        if (err) {
+          log.err('There was an error attempting to protect the connection', err)
+          return callback(err)
+        }
+
+        connection.getPeerInfo(() => {
+          protectedConnection.setInnerConn(new Connection(encryptedOuterStream, connection))
+          log('the connection has been successfully wrapped by the protector')
+          callback()
+        })
+      }),
+      connection
+    )
+
+    return protectedConnection
+  }
+}
+
+module.exports = Protector
+module.exports.errors = Errors
+module.exports.generate = require('./key-generator')

src/pnet/key-generator.js

@@ -0,0 +1,22 @@
+'use strict'
+
+const crypto = require('crypto')
+const KEY_LENGTH = 32
+
+/**
+ * Generates a PSK that can be used in a libp2p-pnet private network
+ * @param {Writer} writer An object containing a `write` method
+ * @returns {void}
+ */
+function generate (writer) {
+  const psk = crypto.randomBytes(KEY_LENGTH).toString('hex')
+  writer.write('/key/swarm/psk/1.0.0/\n/base16/\n' + psk)
+}
+
+module.exports = generate
+module.exports.NONCE_LENGTH = 24
+module.exports.KEY_LENGTH = KEY_LENGTH
+
+if (require.main === module) {
+  generate(process.stdout)
+}

src/pnet/state.js

@@ -0,0 +1,110 @@
+'use strict'
+
+const crypto = require('crypto')
+const debug = require('debug')
+const pair = require('pull-pair')
+const Reader = require('pull-reader')
+const cat = require('pull-cat')
+const pull = require('pull-stream')
+const deferred = require('pull-defer')
+
+const cryptoStreams = require('./crypto')
+const NONCE_LENGTH = require('./key-generator').NONCE_LENGTH
+
+const log = debug('libp2p:pnet')
+log.err = debug('libp2p:pnet:err')
+log.trace = debug('libp2p:pnet:trace')
+
+/**
+ * Keeps track of the state of a given connection, such as the local psk
+ * and local and remote nonces for encryption/decryption
+ */
+class State {
+  /**
+   * @param {Buffer} psk The key buffer used for encryption
+   * @constructor
+   */
+  constructor (psk) {
+    this.local = {
+      nonce: Buffer.from(
+        crypto.randomBytes(NONCE_LENGTH)
+      ),
+      psk: psk
+    }
+    this.remote = { nonce: null }
+
+    this.rawReader = Reader(60e3)
+    this.encryptedReader = Reader(60e3)
+
+    this.rawPairStream = pair()
+    this.encryptedPairStream = pair()
+
+    // The raw, pair stream
+    this.innerRawStream = null
+    this.outerRawStream = {
+      sink: this.rawReader,
+      source: cat([
+        pull.values([
+          this.local.nonce
+        ]),
+        this.rawPairStream.source
+      ])
+    }
+
+    // The encrypted, pair stream
+    this.innerEncryptedStream = {
+      sink: this.encryptedReader,
+      source: this.encryptedPairStream.source
+    }
+    this.outerEncryptedStream = null
+  }
+
+  /**
+   * Creates encryption streams for the given state
+   *
+   * @param {function(Error, Connection)} callback
+   * @returns {void}
+   */
+  encrypt (callback) {
+    // The outer stream needs to be returned before we setup the
+    // rest of the streams, so we're delaying the execution
+    setTimeout(() => {
+      // Read the nonce first, once we have it resolve the
+      // deferred source, so we keep reading
+      const deferredSource = deferred.source()
+      this.rawReader.read(NONCE_LENGTH, (err, data) => {
+        if (err) {
+          log.err('There was an error attempting to read the nonce', err)
+        }
+        log.trace('remote nonce received')
+        this.remote.nonce = data
+        deferredSource.resolve(this.rawReader.read())
+      })
+
+      this.innerRawStream = {
+        sink: this.rawPairStream.sink,
+        source: deferredSource
+      }
+
+      // Create the pull exchange between the two inner streams
+      pull(
+        this.innerRawStream,
+        cryptoStreams.createUnboxStream(this.remote, this.local.psk),
+        this.innerEncryptedStream,
+        cryptoStreams.createBoxStream(this.local.nonce, this.local.psk),
+        this.innerRawStream
+      )
+
+      this.outerEncryptedStream = {
+        sink: this.encryptedPairStream.sink,
+        source: this.encryptedReader.read()
+      }
+
+      callback(null, this.outerEncryptedStream)
+    }, 0)
+
+    return this.outerRawStream
+  }
+}
+
+module.exports = State

src/pubsub.js

@@ -1,77 +1,145 @@
 'use strict'
 
-const setImmediate = require('async/setImmediate')
-const NOT_STARTED_YET = require('./error-messages').NOT_STARTED_YET
-const FloodSub = require('libp2p-floodsub')
+const nextTick = require('async/nextTick')
+const { messages, codes } = require('./errors')
+const promisify = require('promisify-es6')
 
-module.exports = (node) => {
-  const floodSub = new FloodSub(node)
+const errCode = require('err-code')
 
-  node._floodSub = floodSub
+module.exports = (node, Pubsub, config) => {
+  const pubsub = new Pubsub(node, config)
 
   return {
-    subscribe: (topic, options, handler, callback) => {
+    /**
+     * Subscribe the given handler to a pubsub topic
+     *
+     * @param {string} topic
+     * @param {function} handler The handler to subscribe
+     * @param {object|null} [options]
+     * @param {function} [callback] An optional callback
+     *
+     * @returns {Promise|void} A promise is returned if no callback is provided
+     *
+     * @example <caption>Subscribe a handler to a topic</caption>
+     *
+     * // `null` must be passed for options until subscribe is no longer using promisify
+     * const handler = (message) => { }
+     * await libp2p.subscribe(topic, handler, null)
+     *
+     * @example <caption>Use a callback instead of the Promise api</caption>
+     *
+     * // `options` may be passed or omitted when supplying a callback
+     * const handler = (message) => { }
+     * libp2p.subscribe(topic, handler, callback)
+     */
+    subscribe: (topic, handler, options, callback) => {
+      // can't use promisify because it thinks the handler is a callback
       if (typeof options === 'function') {
-        callback = handler
-        handler = options
+        callback = options
         options = {}
       }
 
-      if (!node.isStarted() && !floodSub.started) {
-        return setImmediate(() => callback(new Error(NOT_STARTED_YET)))
-      }
+      if (!node.isStarted() && !pubsub.started) {
+        const err = errCode(new Error(messages.NOT_STARTED_YET), codes.PUBSUB_NOT_STARTED)
 
-      function subscribe (cb) {
-        if (floodSub.listenerCount(topic) === 0) {
-          floodSub.subscribe(topic)
+        if (callback) {
+          return nextTick(() => callback(err))
         }
 
-        floodSub.on(topic, handler)
-        setImmediate(cb)
+        return Promise.reject(err)
       }
 
-      subscribe(callback)
+      if (pubsub.listenerCount(topic) === 0) {
+        pubsub.subscribe(topic)
+      }
+
+      pubsub.on(topic, handler)
+
+      if (callback) {
+        return nextTick(() => callback())
+      }
+
+      return Promise.resolve()
     },
 
-    unsubscribe: (topic, handler) => {
-      if (!node.isStarted() && !floodSub.started) {
-        throw new Error(NOT_STARTED_YET)
+    /**
+     * Unsubscribes from a pubsub topic
+     *
+     * @param {string} topic
+     * @param {function|null} handler The handler to unsubscribe from
+     * @param {function} [callback] An optional callback
+     *
+     * @returns {Promise|void} A promise is returned if no callback is provided
+     *
+     * @example <caption>Unsubscribe a topic for all handlers</caption>
+     *
+     * // `null` must be passed until unsubscribe is no longer using promisify
+     * await libp2p.unsubscribe(topic, null)
+     *
+     * @example <caption>Unsubscribe a topic for 1 handler</caption>
+     *
+     * await libp2p.unsubscribe(topic, handler)
+     *
+     * @example <caption>Use a callback instead of the Promise api</caption>
+     *
+     * libp2p.unsubscribe(topic, handler, callback)
+     */
+    unsubscribe: (topic, handler, callback) => {
+      // can't use promisify because it thinks the handler is a callback
+      if (!node.isStarted() && !pubsub.started) {
+        const err = errCode(new Error(messages.NOT_STARTED_YET), codes.PUBSUB_NOT_STARTED)
+
+        if (callback) {
+          return nextTick(() => callback(err))
+        }
+
+        return Promise.reject(err)
       }
 
-      floodSub.removeListener(topic, handler)
-
-      if (floodSub.listenerCount(topic) === 0) {
-        floodSub.unsubscribe(topic)
+      if (!handler) {
+        pubsub.removeAllListeners(topic)
+      } else {
+        pubsub.removeListener(topic, handler)
       }
+
+      if (pubsub.listenerCount(topic) === 0) {
+        pubsub.unsubscribe(topic)
+      }
+
+      if (callback) {
+        return nextTick(() => callback())
+      }
+
+      return Promise.resolve()
     },
 
-    publish: (topic, data, callback) => {
-      if (!node.isStarted() && !floodSub.started) {
-        return setImmediate(() => callback(new Error(NOT_STARTED_YET)))
+    publish: promisify((topic, data, callback) => {
+      if (!node.isStarted() && !pubsub.started) {
+        return nextTick(callback, errCode(new Error(messages.NOT_STARTED_YET), codes.PUBSUB_NOT_STARTED))
       }
 
-      if (!Buffer.isBuffer(data)) {
-        return setImmediate(() => callback(new Error('data must be a Buffer')))
+      try {
+        data = Buffer.from(data)
+      } catch (err) {
+        return nextTick(callback, errCode(new Error('data must be convertible to a Buffer'), 'ERR_DATA_IS_NOT_VALID'))
       }
 
-      floodSub.publish(topic, data)
+      pubsub.publish(topic, data, callback)
+    }),
 
-      setImmediate(() => callback())
-    },
-
-    ls: (callback) => {
-      if (!node.isStarted() && !floodSub.started) {
-        return setImmediate(() => callback(new Error(NOT_STARTED_YET)))
+    ls: promisify((callback) => {
+      if (!node.isStarted() && !pubsub.started) {
+        return nextTick(callback, errCode(new Error(messages.NOT_STARTED_YET), codes.PUBSUB_NOT_STARTED))
       }
 
-      const subscriptions = Array.from(floodSub.subscriptions)
+      const subscriptions = Array.from(pubsub.subscriptions)
 
-      setImmediate(() => callback(null, subscriptions))
-    },
+      nextTick(() => callback(null, subscriptions))
+    }),
 
-    peers: (topic, callback) => {
-      if (!node.isStarted() && !floodSub.started) {
-        return setImmediate(() => callback(new Error(NOT_STARTED_YET)))
+    peers: promisify((topic, callback) => {
+      if (!node.isStarted() && !pubsub.started) {
+        return nextTick(callback, errCode(new Error(messages.NOT_STARTED_YET), codes.PUBSUB_NOT_STARTED))
       }
 
       if (typeof topic === 'function') {
@@ -79,15 +147,19 @@ module.exports = (node) => {
         topic = null
       }
 
-      const peers = Array.from(floodSub.peers.values())
+      const peers = Array.from(pubsub.peers.values())
         .filter((peer) => topic ? peer.topics.has(topic) : true)
         .map((peer) => peer.info.id.toB58String())
 
-      setImmediate(() => callback(null, peers))
-    },
+      nextTick(() => callback(null, peers))
+    }),
 
     setMaxListeners (n) {
-      return floodSub.setMaxListeners(n)
-    }
+      return pubsub.setMaxListeners(n)
+    },
+
+    start: promisify((cb) => pubsub.start(cb)),
+
+    stop: promisify((cb) => pubsub.stop(cb))
   }
 }

src/switch/README.md

@@ -0,0 +1,423 @@
+libp2p-switch JavaScript implementation
+======================================
+
+> libp2p-switch is a dialer machine, it leverages the multiple libp2p transports, stream muxers, crypto channels and other connection upgrades to dial to peers in the libp2p network. It also supports Protocol Multiplexing through a multicodec and multistream-select handshake.
+
+**Note**: git history prior to merging into js-libp2p can be found in the original repository, https://github.com/libp2p/js-libp2p-switch.
+
+## Table of Contents
+
+- [Install](#install)
+- [Usage](#usage)
+  - [Create a libp2p switch](#create-a-libp2p-switch)
+- [API](#api)
+  - [`switch.connection`](#switchconnection)
+  - [`switch.dial(peer, protocol, callback)`](#switchdialpeer-protocol-callback)
+  - [`switch.dialFSM(peer, protocol, callback)`](#switchdialfsmpeer-protocol-callback)
+  - [`switch.handle(protocol, handlerFunc, matchFunc)`](#switchhandleprotocol-handlerfunc-matchfunc)
+  - [`switch.hangUp(peer, callback)`](#switchhanguppeer-callback)
+  - [`switch.start(callback)`](#switchstartcallback)
+  - [`switch.stop(callback)`](#switchstopcallback)
+  - [`switch.stats`](#stats-api)
+  - [`switch.unhandle(protocol)`](#switchunhandleprotocol)
+  - [Internal Transports API](#internal-transports-api)
+- [Design Notes](#design-notes)
+  - [Multitransport](#multitransport)
+  - [Connection upgrades](#connection-upgrades)
+  - [Identify](#identify)
+  - [Notes](#notes)
+- [Contribute](#contribute)
+- [License](#license)
+
+## Install
+
+```bash
+> npm install libp2p-switch --save
+```
+
+## Usage
+
+### Create a libp2p Switch
+
+```JavaScript
+const switch = require('libp2p-switch')
+
+const sw = new switch(peerInfo , peerBook [, options])
+```
+
+If defined, `options` should be an object with the following keys and respective values:
+
+- `denyTTL`: - number of ms a peer should not be dialable to after it errors. Each successive deny will increase the TTL from the base value. Defaults to 5 minutes
+- `denyAttempts`: - number of times a peer can be denied before they are permanently denied. Defaults to 5.
+- `maxParallelDials`: - number of concurrent dials the switch should allow. Defaults to `100`
+- `maxColdCalls`: - number of queued cold calls that are allowed. Defaults to `50`
+- `dialTimeout`: - number of ms a dial to a peer should be allowed to run. Defaults to `30000` (30 seconds)
+- `stats`: an object with the following keys and respective values:
+  - `maxOldPeersRetention`: maximum old peers retention. For when peers disconnect and keeping the stats around in case they reconnect. Defaults to `100`.
+  - `computeThrottleMaxQueueSize`: maximum queue size to perform stats computation throttling. Defaults to `1000`.
+  - `computeThrottleTimeout`: Throttle timeout, in miliseconds. Defaults to `2000`,
+  - `movingAverageIntervals`: Array containin the intervals, in miliseconds, for which moving averages are calculated. Defaults to:
+
+  ```js
+  [
+    60 * 1000, // 1 minute
+    5 * 60 * 1000, // 5 minutes
+    15 * 60 * 1000 // 15 minutes
+  ]
+  ```
+
+### Private Networks
+
+libp2p-switch supports private networking. In order to enabled private networks, the `switch.protector` must be
+set and must contain a `protect` method. You can see an example of this in the [private network
+tests]([./test/pnet.node.js]).
+
+## API
+
+- peerInfo is a [PeerInfo](https://github.com/libp2p/js-peer-info) object that has the peer information.
+- peerBook is a [PeerBook](https://github.com/libp2p/js-peer-book) object that stores all the known peers.
+
+### `switch.connection`
+
+##### `switch.connection.addUpgrade()`
+
+A connection upgrade must be able to receive and return something that implements the [interface-connection](https://github.com/libp2p/interface-connection) specification.
+
+> **WIP**
+
+##### `switch.connection.addStreamMuxer(muxer)`
+
+Upgrading a connection to use a stream muxer is still considered an upgrade, but a special case since once this connection is applied, the returned obj will implement the [interface-stream-muxer](https://github.com/libp2p/interface-stream-muxer) spec.
+
+- `muxer`
+
+##### `switch.connection.reuse()`
+
+Enable the identify protocol.
+
+##### `switch.connection.crypto([tag, encrypt])`
+
+Enable a specified crypto protocol. By default no encryption is used, aka `plaintext`. If called with no arguments it resets to use `plaintext`.
+
+You can use for example [libp2p-secio](https://github.com/libp2p/js-libp2p-secio) like this
+
+```js
+const secio = require('libp2p-secio')
+switch.connection.crypto(secio.tag, secio.encrypt)
+```
+
+##### `switch.connection.enableCircuitRelay(options, callback)`
+
+Enable circuit relaying.
+
+- `options`
+    - enabled - activates relay dialing and listening functionality
+    - hop - an object with two properties
+        - enabled - enables circuit relaying
+        - active - is it an active or passive relay (default false)
+- `callback`
+
+### `switch.dial(peer, protocol, callback)`
+
+dial uses the best transport (whatever works first, in the future we can have some criteria), and jump starts the connection until the point where we have to negotiate the protocol. If a muxer is available, then drop the muxer onto that connection. Good to warm up connections or to check for connectivity. If we have already a muxer for that peerInfo, then do nothing.
+
+- `peer`: can be an instance of [PeerInfo][], [PeerId][] or [multiaddr][]
+- `protocol`
+- `callback`
+
+### `switch.dialFSM(peer, protocol, callback)`
+
+works like dial, but calls back with a [Connection State Machine](#connection-state-machine)
+
+- `peer`: can be an instance of [PeerInfo][], [PeerId][] or [multiaddr][]
+- `protocol`: String that defines the protocol (e.g '/ipfs/bitswap/1.1.0') to be used
+- `callback`: Function with signature `function (err, connFSM) {}` where `connFSM` is a [Connection State Machine](#connection-state-machine)
+
+#### Connection State Machine
+Connection state machines emit a number of events that can be used to determine the current state of the connection
+and to received the underlying connection that can be used to transfer data.
+
+### `switch.dialer.connect(peer, options, callback)`
+
+a low priority dial to the provided peer. Calls to `dial` and `dialFSM` will take priority. This should be used when an application only wishes to establish connections to new peers, such as during peer discovery when there is a low peer count. Currently, anything greater than the HIGH_PRIORITY (10) will be placed into the cold call queue, and anything less than or equal to the HIGH_PRIORITY will be added to the normal queue.
+
+- `peer`: can be an instance of [PeerInfo][], [PeerId][] or [multiaddr][]
+- `options`: Optional
+- `options.priority`: Number of the priority of the dial, defaults to 20.
+- `options.useFSM`: Boolean of whether or not to callback with a [Connection State Machine](#connection-state-machine)
+- `callback`: Function with signature `function (err, connFSM) {}` where `connFSM` is a [Connection State Machine](#connection-state-machine)
+
+##### Events
+- `error`:  emitted whenever a fatal error occurs with the connection; the error will be emitted.
+- `error:upgrade_failed`: emitted whenever the connection fails to upgrade with a muxer, this is not fatal.
+- `error:connection_attempt_failed`: emitted whenever a dial attempt fails for a given transport. An array of errors is emitted.
+- `connection`: emitted whenever a useable connection has been established; the underlying [Connection](https://github.com/libp2p/interface-connection) will be emitted.
+- `close`: emitted when the connection has closed.
+
+### `switch.handle(protocol, handlerFunc, matchFunc)`
+
+Handle a new protocol.
+
+- `protocol`
+- `handlerFunc` - function called when we receive a dial on `protocol. Signature must be `function (protocol, conn) {}`
+- `matchFunc` - matchFunc for multistream-select
+
+### `switch.hangUp(peer, callback)`
+
+Hang up the muxed connection we have with the peer.
+
+- `peer`: can be an instance of [PeerInfo][], [PeerId][] or [multiaddr][]
+- `callback`
+
+### `switch.on('error', (err) => {})`
+
+Emitted when the switch encounters an error.
+
+- `err`: instance of [Error][]
+
+### `switch.on('peer-mux-established', (peer) => {})`
+
+- `peer`: is instance of [PeerInfo][] that has info of the peer we have just established a muxed connection with.
+
+### `switch.on('peer-mux-closed', (peer) => {})`
+
+- `peer`: is instance of [PeerInfo][] that has info of the peer we have just closed a muxed connection with.
+
+### `switch.on('connection:start', (peer) => {})`
+This will be triggered anytime a new connection is created.
+
+- `peer`: is instance of [PeerInfo][] that has info of the peer we have just started a connection with.
+
+### `switch.on('connection:end', (peer) => {})`
+This will be triggered anytime an existing connection, regardless of state, is removed from the switch's internal connection tracking.
+
+- `peer`: is instance of [PeerInfo][] that has info of the peer we have just closed a connection with.
+
+### `switch.on('start', () => {})`
+
+Emitted when the switch has successfully started.
+
+### `switch.on('stop', () => {})`
+
+Emitted when the switch has successfully stopped.
+
+### `switch.start(callback)`
+
+Start listening on all added transports that are available on the current `peerInfo`.
+
+### `switch.stop(callback)`
+
+Close all the listeners and muxers.
+
+- `callback`
+
+### Stats API
+
+##### `switch.stats.emit('update')`
+
+Every time any stat value changes, this object emits an `update` event.
+
+#### Global stats
+
+##### `switch.stats.global.snapshot`
+
+Should return a stats snapshot, which is an object containing the following keys and respective values:
+
+- dataSent: amount of bytes sent, [Big](https://github.com/MikeMcl/big.js#readme) number
+- dataReceived: amount of bytes received, [Big](https://github.com/MikeMcl/big.js#readme) number
+
+##### `switch.stats.global.movingAverages`
+
+Returns an object containing the following keys:
+
+- dataSent
+- dataReceived
+
+Each one of them contains an object that has a key for each interval (`60000`, `300000` and `900000` miliseconds).
+
+Each one of these values is [an exponential moving-average instance](https://github.com/pgte/moving-average#readme).
+
+#### Per-transport stats
+
+##### `switch.stats.transports()`
+
+Returns an array containing the tags (string) for each observed transport.
+
+##### `switch.stats.forTransport(transportTag).snapshot`
+
+Should return a stats snapshot, which is an object containing the following keys and respective values:
+
+- dataSent: amount of bytes sent, [Big](https://github.com/MikeMcl/big.js#readme) number
+- dataReceived: amount of bytes received, [Big](https://github.com/MikeMcl/big.js#readme) number
+
+##### `switch.stats.forTransport(transportTag).movingAverages`
+
+Returns an object containing the following keys:
+
+ dataSent
+ dataReceived
+
+Each one of them contains an object that has a key for each interval (`60000`, `300000` and `900000` miliseconds).
+
+Each one of these values is [an exponential moving-average instance](https://github.com/pgte/moving-average#readme).
+
+#### Per-protocol stats
+
+##### `switch.stats.protocols()`
+
+Returns an array containing the tags (string) for each observed protocol.
+
+##### `switch.stats.forProtocol(protocolTag).snapshot`
+
+Should return a stats snapshot, which is an object containing the following keys and respective values:
+
+- dataSent: amount of bytes sent, [Big](https://github.com/MikeMcl/big.js#readme) number
+- dataReceived: amount of bytes received, [Big](https://github.com/MikeMcl/big.js#readme) number
+
+
+##### `switch.stats.forProtocol(protocolTag).movingAverages`
+
+Returns an object containing the following keys:
+
+- dataSent
+- dataReceived
+
+Each one of them contains an object that has a key for each interval (`60000`, `300000` and `900000` miliseconds).
+
+Each one of these values is [an exponential moving-average instance](https://github.com/pgte/moving-average#readme).
+
+#### Per-peer stats
+
+##### `switch.stats.peers()`
+
+Returns an array containing the peerIDs (B58-encoded string) for each observed peer.
+
+##### `switch.stats.forPeer(peerId:String).snapshot`
+
+Should return a stats snapshot, which is an object containing the following keys and respective values:
+
+- dataSent: amount of bytes sent, [Big](https://github.com/MikeMcl/big.js#readme) number
+- dataReceived: amount of bytes received, [Big](https://github.com/MikeMcl/big.js#readme) number
+
+
+##### `switch.stats.forPeer(peerId:String).movingAverages`
+
+Returns an object containing the following keys:
+
+- dataSent
+- dataReceived
+
+Each one of them contains an object that has a key for each interval (`60000`, `300000` and `900000` miliseconds).
+
+Each one of these values is [an exponential moving-average instance](https://github.com/pgte/moving-average#readme).
+
+#### Stats update interval
+
+Stats are not updated in real-time. Instead, measurements are buffered and stats are updated at an interval. The maximum interval can be defined through the `Switch` constructor option `stats.computeThrottleTimeout`, defined in miliseconds.
+
+### `switch.unhandle(protocol)`
+
+Unhandle a protocol.
+
+- `protocol`
+
+### Internal Transports API
+
+##### `switch.transport.add(key, transport, options)`
+
+libp2p-switch expects transports that implement [interface-transport](https://github.com/libp2p/interface-transport). For example [libp2p-tcp](https://github.com/libp2p/js-libp2p-tcp).
+
+- `key` - the transport identifier.
+- `transport` -
+- `options` -
+
+##### `switch.transport.dial(key, multiaddrs, callback)`
+
+Dial to a peer on a specific transport.
+
+- `key`
+- `multiaddrs`
+- `callback`
+
+##### `switch.transport.listen(key, options, handler, callback)`
+
+Set a transport to start listening mode.
+
+- `key`
+- `options`
+- `handler`
+- `callback`
+
+##### `switch.transport.close(key, callback)`
+
+Close the listeners of a given transport.
+
+- `key`
+- `callback`
+
+## Design Notes
+
+### Multitransport
+
+libp2p is designed to support multiple transports at the same time. While peers are identified by their ID (which are generated from their public keys), the addresses of each pair may vary, depending the device where they are being run or the network in which they are accessible through.
+
+In order for a transport to be supported, it has to follow the [interface-transport](https://github.com/libp2p/interface-transport) spec.
+
+### Connection upgrades
+
+Each connection in libp2p follows the [interface-connection](https://github.com/libp2p/interface-connection) spec. This design decision enables libp2p to have upgradable transports.
+
+We think of `upgrade` as a very important notion when we are talking about connections, we can see mechanisms like: stream multiplexing, congestion control, encrypted channels, multipath, simulcast, etc, as `upgrades` to a connection. A connection can be a simple and with no guarantees, drop a packet on the network with a destination thing, a transport in the other hand can be a connection and or a set of different upgrades that are mounted on top of each other, giving extra functionality to that connection and therefore `upgrading` it.
+
+Types of upgrades to a connection:
+
+- encrypted channel (with TLS for e.g)
+- congestion flow (some transports don't have it by default)
+- multipath (open several connections and abstract it as a single connection)
+- simulcast (still really thinking this one through, it might be interesting to send a packet through different connections under some hard network circumstances)
+- stream-muxer - this a special case, because once we upgrade a connection to a stream-muxer, we can open more streams (multiplex them) on a single stream, also enabling us to reuse the underlying dialed transport
+
+We also want to enable flexibility when it comes to upgrading a connection, for example, we might that all dialed transports pass through the encrypted channel upgrade, but not the congestion flow, specially when a transport might have already some underlying properties (UDP vs TCP vs WebRTC vs every other transport protocol)
+
+### Identify
+
+Identify is a protocol that switchs mounts on top of itself, to identify the connections between any two peers. E.g:
+
+- a) peer A dials a conn to peer B
+- b) that conn gets upgraded to a stream multiplexer that both peers agree
+- c) peer B executes de identify protocol
+- d) peer B now can open streams to peer A, knowing which is the
+identity of peer A
+
+In addition to this, we also share the "observed addresses" by the other peer, which is extremely useful information for different kinds of network topologies.
+
+### Notes
+
+To avoid the confusion between connection, stream, transport, and other names that represent an abstraction of data flow between two points, we use terms as:
+
+- connection - something that implements the transversal expectations of a stream between two peers, including the benefits of using a stream plus having a way to do half duplex, full duplex
+- transport - something that as a dial/listen interface and return objs that implement a connection interface
+
+### This module uses `pull-streams`
+
+We expose a streaming interface based on `pull-streams`, rather then on the Node.js core streams implementation (aka Node.js streams). `pull-streams` offers us a better mechanism for error handling and flow control guarantees. If you would like to know more about why we did this, see the discussion at this [issue](https://github.com/ipfs/js-ipfs/issues/362).
+
+You can learn more about pull-streams at:
+
+- [The history of Node.js streams, nodebp April 2014](https://www.youtube.com/watch?v=g5ewQEuXjsQ)
+- [The history of streams, 2016](http://dominictarr.com/post/145135293917/history-of-streams)
+- [pull-streams, the simple streaming primitive](http://dominictarr.com/post/149248845122/pull-streams-pull-streams-are-a-very-simple)
+- [pull-streams documentation](https://pull-stream.github.io/)
+
+#### Converting `pull-streams` to Node.js Streams
+
+If you are a Node.js streams user, you can convert a pull-stream to a Node.js stream using the module [`pull-stream-to-stream`](https://github.com/pull-stream/pull-stream-to-stream), giving you an instance of a Node.js stream that is linked to the pull-stream. For example:
+
+```js
+const pullToStream = require('pull-stream-to-stream')
+
+const nodeStreamInstance = pullToStream(pullStreamInstance)
+// nodeStreamInstance is an instance of a Node.js Stream
+```
+
+To learn more about this utility, visit https://pull-stream.github.io/#pull-stream-to-stream.

src/switch/connection/base.js

@@ -0,0 +1,126 @@
+'use strict'
+
+const EventEmitter = require('events').EventEmitter
+const debug = require('debug')
+const withIs = require('class-is')
+
+class BaseConnection extends EventEmitter {
+  constructor ({ _switch, name }) {
+    super()
+
+    this.switch = _switch
+    this.ourPeerInfo = this.switch._peerInfo
+    this.log = debug(`libp2p:conn:${name}`)
+    this.log.error = debug(`libp2p:conn:${name}:error`)
+  }
+
+  /**
+   * Puts the state into its disconnecting flow
+   *
+   * @param {Error} err Will be emitted if provided
+   * @returns {void}
+   */
+  close (err) {
+    if (this._state._state === 'DISCONNECTING') return
+    this.log('closing connection to %s', this.theirB58Id)
+    if (err && this._events.error) {
+      this.emit('error', err)
+    }
+    this._state('disconnect')
+  }
+
+  emit (eventName, ...args) {
+    if (eventName === 'error' && !this._events.error) {
+      this.log.error(...args)
+    } else {
+      super.emit(eventName, ...args)
+    }
+  }
+
+  /**
+   * Gets the current state of the connection
+   *
+   * @returns {string} The current state of the connection
+   */
+  getState () {
+    return this._state._state
+  }
+
+  /**
+   * Puts the state into encrypting mode
+   *
+   * @returns {void}
+   */
+  encrypt () {
+    this._state('encrypt')
+  }
+
+  /**
+   * Puts the state into privatizing mode
+   *
+   * @returns {void}
+   */
+  protect () {
+    this._state('privatize')
+  }
+
+  /**
+   * Puts the state into muxing mode
+   *
+   * @returns {void}
+   */
+  upgrade () {
+    this._state('upgrade')
+  }
+
+  /**
+   * Event handler for disconnected.
+   *
+   * @fires BaseConnection#close
+   * @returns {void}
+   */
+  _onDisconnected () {
+    this.switch.connection.remove(this)
+    this.log('disconnected from %s', this.theirB58Id)
+    this.emit('close')
+    this.removeAllListeners()
+  }
+
+  /**
+   * Event handler for privatized
+   *
+   * @fires BaseConnection#private
+   * @returns {void}
+   */
+  _onPrivatized () {
+    this.emit('private', this.conn)
+  }
+
+  /**
+   * Wraps this.conn with the Switch.protector for private connections
+   *
+   * @private
+   * @fires ConnectionFSM#error
+   * @returns {void}
+   */
+  _onPrivatizing () {
+    if (!this.switch.protector) {
+      return this._state('done')
+    }
+
+    this.conn = this.switch.protector.protect(this.conn, (err) => {
+      if (err) {
+        return this.close(err)
+      }
+
+      this.log('successfully privatized conn to %s', this.theirB58Id)
+      this.conn.setPeerInfo(this.theirPeerInfo)
+      this._state('done')
+    })
+  }
+}
+
+module.exports = withIs(BaseConnection, {
+  className: 'BaseConnection',
+  symbolName: 'libp2p-switch/BaseConnection'
+})

src/switch/connection/handler.js

@@ -0,0 +1,47 @@
+'use strict'
+
+const debug = require('debug')
+const IncomingConnection = require('./incoming')
+const observeConn = require('../observe-connection')
+
+function listener (_switch) {
+  const log = debug('libp2p:switch:listener')
+
+  /**
+   * Takes a transport key and returns a connection handler function
+   *
+   * @param {string} transportKey The key of the transport to handle connections for
+   * @param {function} handler A custom handler to use
+   * @returns {function(Connection)} A connection handler function
+   */
+  return function (transportKey, handler) {
+    /**
+     * Takes a base connection and manages listening behavior
+     *
+     * @param {Connection} conn The connection to manage
+     * @returns {void}
+     */
+    return function (conn) {
+      log('received incoming connection for transport %s', transportKey)
+      conn.getPeerInfo((_, peerInfo) => {
+        // Add a transport level observer, if needed
+        const connection = transportKey ? observeConn(transportKey, null, conn, _switch.observer) : conn
+        const connFSM = new IncomingConnection({ connection, _switch, transportKey, peerInfo })
+
+        connFSM.once('error', (err) => log(err))
+        connFSM.once('private', (_conn) => {
+          // Use the custom handler, if it was provided
+          if (handler) {
+            return handler(_conn)
+          }
+          connFSM.encrypt()
+        })
+        connFSM.once('encrypted', () => connFSM.upgrade())
+
+        connFSM.protect()
+      })
+    }
+  }
+}
+
+module.exports = listener

src/switch/connection/incoming.js

@@ -0,0 +1,115 @@
+'use strict'
+
+const FSM = require('fsm-event')
+const multistream = require('multistream-select')
+const withIs = require('class-is')
+
+const BaseConnection = require('./base')
+
+class IncomingConnectionFSM extends BaseConnection {
+  constructor ({ connection, _switch, transportKey, peerInfo }) {
+    super({
+      _switch,
+      name: `inc:${_switch._peerInfo.id.toB58String().slice(0, 8)}`
+    })
+    this.conn = connection
+    this.theirPeerInfo = peerInfo || null
+    this.theirB58Id = this.theirPeerInfo ? this.theirPeerInfo.id.toB58String() : null
+    this.ourPeerInfo = this.switch._peerInfo
+    this.transportKey = transportKey
+    this.protocolMuxer = this.switch.protocolMuxer(this.transportKey)
+    this.msListener = new multistream.Listener()
+
+    this._state = FSM('DIALED', {
+      DISCONNECTED: {
+        disconnect: 'DISCONNECTED'
+      },
+      DIALED: { // Base connection to peer established
+        privatize: 'PRIVATIZING',
+        encrypt: 'ENCRYPTING'
+      },
+      PRIVATIZING: { // Protecting the base connection
+        done: 'PRIVATIZED',
+        disconnect: 'DISCONNECTING'
+      },
+      PRIVATIZED: { // Base connection is protected
+        encrypt: 'ENCRYPTING'
+      },
+      ENCRYPTING: { // Encrypting the base connection
+        done: 'ENCRYPTED',
+        disconnect: 'DISCONNECTING'
+      },
+      ENCRYPTED: { // Upgrading could not happen, the connection is encrypted and waiting
+        upgrade: 'UPGRADING',
+        disconnect: 'DISCONNECTING'
+      },
+      UPGRADING: { // Attempting to upgrade the connection with muxers
+        done: 'MUXED'
+      },
+      MUXED: {
+        disconnect: 'DISCONNECTING'
+      },
+      DISCONNECTING: { // Shutting down the connection
+        done: 'DISCONNECTED'
+      }
+    })
+
+    this._state.on('DISCONNECTED', () => this._onDisconnected())
+    this._state.on('PRIVATIZING', () => this._onPrivatizing())
+    this._state.on('PRIVATIZED', () => this._onPrivatized())
+    this._state.on('ENCRYPTING', () => this._onEncrypting())
+    this._state.on('ENCRYPTED', () => {
+      this.log('successfully encrypted connection to %s', this.theirB58Id || 'unknown peer')
+      this.emit('encrypted', this.conn)
+    })
+    this._state.on('UPGRADING', () => this._onUpgrading())
+    this._state.on('MUXED', () => {
+      this.log('successfully muxed connection to %s', this.theirB58Id || 'unknown peer')
+      this.emit('muxed', this.conn)
+    })
+    this._state.on('DISCONNECTING', () => {
+      this._state('done')
+    })
+  }
+
+  /**
+   * Attempts to encrypt `this.conn` with the Switch's crypto.
+   *
+   * @private
+   * @fires IncomingConnectionFSM#error
+   * @returns {void}
+   */
+  _onEncrypting () {
+    this.log('encrypting connection via %s', this.switch.crypto.tag)
+
+    this.msListener.addHandler(this.switch.crypto.tag, (protocol, _conn) => {
+      this.conn = this.switch.crypto.encrypt(this.ourPeerInfo.id, _conn, undefined, (err) => {
+        if (err) {
+          return this.close(err)
+        }
+        this.conn.getPeerInfo((_, peerInfo) => {
+          this.theirPeerInfo = peerInfo
+          this._state('done')
+        })
+      })
+    }, null)
+
+    // Start handling the connection
+    this.msListener.handle(this.conn, (err) => {
+      if (err) {
+        this.emit('crypto handshaking failed', err)
+      }
+    })
+  }
+
+  _onUpgrading () {
+    this.log('adding the protocol muxer to the connection')
+    this.protocolMuxer(this.conn, this.msListener)
+    this._state('done')
+  }
+}
+
+module.exports = withIs(IncomingConnectionFSM, {
+  className: 'IncomingConnectionFSM',
+  symbolName: 'libp2p-switch/IncomingConnectionFSM'
+})

src/switch/connection/index.js

@@ -0,0 +1,498 @@
+'use strict'
+
+const FSM = require('fsm-event')
+const Circuit = require('../../circuit')
+const multistream = require('multistream-select')
+const withIs = require('class-is')
+const BaseConnection = require('./base')
+const parallel = require('async/parallel')
+const nextTick = require('async/nextTick')
+const identify = require('../../identify')
+const errCode = require('err-code')
+const { msHandle, msSelect, identifyDialer } = require('../utils')
+
+const observeConnection = require('../observe-connection')
+const {
+  CONNECTION_FAILED,
+  DIAL_SELF,
+  INVALID_STATE_TRANSITION,
+  NO_TRANSPORTS_REGISTERED,
+  maybeUnexpectedEnd
+} = require('../errors')
+
+/**
+ * @typedef {Object} ConnectionOptions
+ * @property {Switch} _switch Our switch instance
+ * @property {PeerInfo} peerInfo The PeerInfo of the peer to dial
+ * @property {Muxer} muxer Optional - A muxed connection
+ * @property {Connection} conn Optional - The base connection
+ * @property {string} type Optional - identify the connection as incoming or outgoing. Defaults to out.
+ */
+
+/**
+ * ConnectionFSM handles the complex logic of managing a connection
+ * between peers. ConnectionFSM is internally composed of a state machine
+ * to help improve the usability and debuggability of connections. The
+ * state machine also helps to improve the ability to handle dial backoff,
+ * coalescing dials and dial locks.
+ */
+class ConnectionFSM extends BaseConnection {
+  /**
+   * @param {ConnectionOptions} connectionOptions
+   * @constructor
+   */
+  constructor ({ _switch, peerInfo, muxer, conn, type = 'out' }) {
+    super({
+      _switch,
+      name: `${type}:${_switch._peerInfo.id.toB58String().slice(0, 8)}`
+    })
+
+    this.theirPeerInfo = peerInfo
+    this.theirB58Id = this.theirPeerInfo.id.toB58String()
+
+    this.conn = conn // The base connection
+    this.muxer = muxer // The upgraded/muxed connection
+
+    let startState = 'DISCONNECTED'
+    if (this.muxer) {
+      startState = 'MUXED'
+    }
+
+    this._state = FSM(startState, {
+      DISCONNECTED: { // No active connections exist for the peer
+        dial: 'DIALING',
+        disconnect: 'DISCONNECTED',
+        done: 'DISCONNECTED'
+      },
+      DIALING: { // Creating an initial connection
+        abort: 'ABORTED',
+        // emit events for different transport dials?
+        done: 'DIALED',
+        error: 'ERRORED',
+        disconnect: 'DISCONNECTING'
+      },
+      DIALED: { // Base connection to peer established
+        encrypt: 'ENCRYPTING',
+        privatize: 'PRIVATIZING'
+      },
+      PRIVATIZING: { // Protecting the base connection
+        done: 'PRIVATIZED',
+        abort: 'ABORTED',
+        disconnect: 'DISCONNECTING'
+      },
+      PRIVATIZED: { // Base connection is protected
+        encrypt: 'ENCRYPTING'
+      },
+      ENCRYPTING: { // Encrypting the base connection
+        done: 'ENCRYPTED',
+        error: 'ERRORED',
+        disconnect: 'DISCONNECTING'
+      },
+      ENCRYPTED: { // Upgrading could not happen, the connection is encrypted and waiting
+        upgrade: 'UPGRADING',
+        disconnect: 'DISCONNECTING'
+      },
+      UPGRADING: { // Attempting to upgrade the connection with muxers
+        stop: 'CONNECTED', // If we cannot mux, stop upgrading
+        done: 'MUXED',
+        error: 'ERRORED',
+        disconnect: 'DISCONNECTING'
+      },
+      MUXED: {
+        disconnect: 'DISCONNECTING'
+      },
+      CONNECTED: { // A non muxed connection is established
+        disconnect: 'DISCONNECTING'
+      },
+      DISCONNECTING: { // Shutting down the connection
+        done: 'DISCONNECTED',
+        disconnect: 'DISCONNECTING'
+      },
+      ABORTED: { }, // A severe event occurred
+      ERRORED: { // An error occurred, but future dials may be allowed
+        disconnect: 'DISCONNECTING' // There could be multiple options here, but this is a likely action
+      }
+    })
+
+    this._state.on('DISCONNECTED', () => this._onDisconnected())
+    this._state.on('DIALING', () => this._onDialing())
+    this._state.on('DIALED', () => this._onDialed())
+    this._state.on('PRIVATIZING', () => this._onPrivatizing())
+    this._state.on('PRIVATIZED', () => this._onPrivatized())
+    this._state.on('ENCRYPTING', () => this._onEncrypting())
+    this._state.on('ENCRYPTED', () => {
+      this.log('successfully encrypted connection to %s', this.theirB58Id)
+      this.emit('encrypted', this.conn)
+    })
+    this._state.on('UPGRADING', () => this._onUpgrading())
+    this._state.on('MUXED', () => {
+      this.log('successfully muxed connection to %s', this.theirB58Id)
+      delete this.switch.conns[this.theirB58Id]
+      this.emit('muxed', this.muxer)
+    })
+    this._state.on('CONNECTED', () => {
+      this.log('unmuxed connection opened to %s', this.theirB58Id)
+      this.emit('unmuxed', this.conn)
+    })
+    this._state.on('DISCONNECTING', () => this._onDisconnecting())
+    this._state.on('ABORTED', () => this._onAborted())
+    this._state.on('ERRORED', () => this._onErrored())
+    this._state.on('error', (err) => this._onStateError(err))
+  }
+
+  /**
+   * Puts the state into dialing mode
+   *
+   * @fires ConnectionFSM#Error May emit a DIAL_SELF error
+   * @returns {void}
+   */
+  dial () {
+    if (this.theirB58Id === this.ourPeerInfo.id.toB58String()) {
+      return this.emit('error', DIAL_SELF())
+    } else if (this.getState() === 'DIALING') {
+      return this.log('attempted to dial while already dialing, ignoring')
+    }
+
+    this._state('dial')
+  }
+
+  /**
+   * Initiates a handshake for the given protocol
+   *
+   * @param {string} protocol The protocol to negotiate
+   * @param {function(Error, Connection)} callback
+   * @returns {void}
+   */
+  shake (protocol, callback) {
+    // If there is no protocol set yet, don't perform the handshake
+    if (!protocol) {
+      return callback(null, null)
+    }
+
+    if (this.muxer && this.muxer.newStream) {
+      return this.muxer.newStream((err, stream) => {
+        if (err) {
+          return callback(err, null)
+        }
+
+        this.log('created new stream to %s', this.theirB58Id)
+        this._protocolHandshake(protocol, stream, callback)
+      })
+    }
+
+    this._protocolHandshake(protocol, this.conn, callback)
+  }
+
+  /**
+   * Puts the state into muxing mode
+   *
+   * @returns {void}
+   */
+  upgrade () {
+    this._state('upgrade')
+  }
+
+  /**
+   * Event handler for dialing. Transitions state when successful.
+   *
+   * @private
+   * @fires ConnectionFSM#error
+   * @returns {void}
+   */
+  _onDialing () {
+    this.log('dialing %s', this.theirB58Id)
+
+    if (!this.switch.hasTransports()) {
+      return this.close(NO_TRANSPORTS_REGISTERED())
+    }
+
+    const tKeys = this.switch.availableTransports(this.theirPeerInfo)
+
+    const circuitEnabled = Boolean(this.switch.transports[Circuit.tag])
+
+    if (circuitEnabled && !tKeys.includes(Circuit.tag)) {
+      tKeys.push(Circuit.tag)
+    }
+
+    const nextTransport = (key) => {
+      const transport = key
+      if (!transport) {
+        if (!circuitEnabled) {
+          return this.close(
+            CONNECTION_FAILED(`Circuit not enabled and all transports failed to dial peer ${this.theirB58Id}!`)
+          )
+        }
+
+        return this.close(
+          CONNECTION_FAILED(`No available transports to dial peer ${this.theirB58Id}!`)
+        )
+      }
+
+      if (transport === Circuit.tag) {
+        this.theirPeerInfo.multiaddrs.add(`/p2p-circuit/p2p/${this.theirB58Id}`)
+      }
+
+      this.log('dialing transport %s', transport)
+      this.switch.transport.dial(transport, this.theirPeerInfo, (errors, _conn) => {
+        if (errors) {
+          this.emit('error:connection_attempt_failed', errors)
+          this.log(errors)
+          return nextTransport(tKeys.shift())
+        }
+
+        this.conn = observeConnection(transport, null, _conn, this.switch.observer)
+        this._state('done')
+      })
+    }
+
+    nextTransport(tKeys.shift())
+  }
+
+  /**
+   * Once a connection has been successfully dialed, the connection
+   * will be privatized or encrypted depending on the presence of the
+   * Switch.protector.
+   *
+   * @returns {void}
+   */
+  _onDialed () {
+    this.log('successfully dialed %s', this.theirB58Id)
+
+    this.emit('connected', this.conn)
+  }
+
+  /**
+   * Event handler for disconnecting. Handles any needed cleanup
+   *
+   * @returns {void}
+   */
+  _onDisconnecting () {
+    this.log('disconnecting from %s', this.theirB58Id, Boolean(this.muxer))
+
+    delete this.switch.conns[this.theirB58Id]
+
+    const tasks = []
+
+    // Clean up stored connections
+    if (this.muxer) {
+      tasks.push((cb) => {
+        this.muxer.end(() => {
+          delete this.muxer
+          cb()
+        })
+      })
+    }
+
+    // If we have the base connection, abort it
+    // Ignore abort errors, since we're closing
+    if (this.conn) {
+      try {
+        this.conn.source.abort()
+      } catch (_) { }
+      delete this.conn
+    }
+
+    parallel(tasks, () => {
+      this._state('done')
+    })
+  }
+
+  /**
+   * Attempts to encrypt `this.conn` with the Switch's crypto.
+   *
+   * @private
+   * @fires ConnectionFSM#error
+   * @returns {void}
+   */
+  _onEncrypting () {
+    const msDialer = new multistream.Dialer()
+    msDialer.handle(this.conn, (err) => {
+      if (err) {
+        return this.close(maybeUnexpectedEnd(err))
+      }
+
+      this.log('selecting crypto %s to %s', this.switch.crypto.tag, this.theirB58Id)
+
+      msDialer.select(this.switch.crypto.tag, (err, _conn) => {
+        if (err) {
+          return this.close(maybeUnexpectedEnd(err))
+        }
+
+        const observedConn = observeConnection(null, this.switch.crypto.tag, _conn, this.switch.observer)
+        const encryptedConn = this.switch.crypto.encrypt(this.ourPeerInfo.id, observedConn, this.theirPeerInfo.id, (err) => {
+          if (err) {
+            return this.close(err)
+          }
+
+          this.conn = encryptedConn
+          this.conn.setPeerInfo(this.theirPeerInfo)
+          this._state('done')
+        })
+      })
+    })
+  }
+
+  /**
+   * Iterates over each Muxer on the Switch and attempts to upgrade
+   * the given `connection`. Successful muxed connections will be stored
+   * on the Switch.muxedConns with `b58Id` as their key for future reference.
+   *
+   * @private
+   * @returns {void}
+   */
+  _onUpgrading () {
+    const muxers = Object.keys(this.switch.muxers)
+    this.log('upgrading connection to %s', this.theirB58Id)
+
+    if (muxers.length === 0) {
+      return this._state('stop')
+    }
+
+    const msDialer = new multistream.Dialer()
+    msDialer.handle(this.conn, (err) => {
+      if (err) {
+        return this._didUpgrade(err)
+      }
+
+      // 1. try to handshake in one of the muxers available
+      // 2. if succeeds
+      //  - add the muxedConn to the list of muxedConns
+      //  - add incomming new streams to connHandler
+      const nextMuxer = (key) => {
+        this.log('selecting %s', key)
+        msDialer.select(key, (err, _conn) => {
+          if (err) {
+            if (muxers.length === 0) {
+              return this._didUpgrade(err)
+            }
+
+            return nextMuxer(muxers.shift())
+          }
+
+          // observe muxed connections
+          const conn = observeConnection(null, key, _conn, this.switch.observer)
+
+          this.muxer = this.switch.muxers[key].dialer(conn)
+
+          this.muxer.once('close', () => {
+            this.close()
+          })
+
+          // For incoming streams, in case identify is on
+          this.muxer.on('stream', (conn) => {
+            this.log('new stream created via muxer to %s', this.theirB58Id)
+            conn.setPeerInfo(this.theirPeerInfo)
+            this.switch.protocolMuxer(null)(conn)
+          })
+
+          this._didUpgrade(null)
+
+          // Run identify on the connection
+          if (this.switch.identify) {
+            this._identify((err, results) => {
+              if (err) {
+                return this.close(err)
+              }
+              this.theirPeerInfo = this.switch._peerBook.put(results.peerInfo)
+            })
+          }
+        })
+      }
+
+      nextMuxer(muxers.shift())
+    })
+  }
+
+  /**
+   * Runs the identify protocol on the connection
+   * @private
+   * @param {function(error, { PeerInfo })} callback
+   * @returns {void}
+   */
+  _identify (callback) {
+    if (!this.muxer) {
+      return nextTick(callback, errCode('The connection was already closed', 'ERR_CONNECTION_CLOSED'))
+    }
+    this.muxer.newStream(async (err, conn) => {
+      if (err) return callback(err)
+      const ms = new multistream.Dialer()
+      let results
+      try {
+        await msHandle(ms, conn)
+        const msConn = await msSelect(ms, identify.multicodec)
+        results = await identifyDialer(msConn, this.theirPeerInfo)
+      } catch (err) {
+        return callback(err)
+      }
+      callback(null, results)
+    })
+  }
+
+  /**
+   * Analyses the given error, if it exists, to determine where the state machine
+   * needs to go.
+   *
+   * @param {Error} err
+   * @returns {void}
+   */
+  _didUpgrade (err) {
+    if (err) {
+      this.log('Error upgrading connection:', err)
+      this.switch.conns[this.theirB58Id] = this
+      this.emit('error:upgrade_failed', err)
+      // Cant upgrade, hold the encrypted connection
+      return this._state('stop')
+    }
+
+    // move the state machine forward
+    this._state('done')
+  }
+
+  /**
+   * Performs the protocol handshake for the given protocol
+   * over the given connection. The resulting error or connection
+   * will be returned via the callback.
+   *
+   * @private
+   * @param {string} protocol
+   * @param {Connection} connection
+   * @param {function(Error, Connection)} callback
+   * @returns {void}
+   */
+  _protocolHandshake (protocol, connection, callback) {
+    const msDialer = new multistream.Dialer()
+    msDialer.handle(connection, (err) => {
+      if (err) {
+        return callback(err, null)
+      }
+
+      msDialer.select(protocol, (err, _conn) => {
+        if (err) {
+          this.log('could not perform protocol handshake:', err)
+          return callback(err, null)
+        }
+
+        const conn = observeConnection(null, protocol, _conn, this.switch.observer)
+        this.log('successfully performed handshake of %s to %s', protocol, this.theirB58Id)
+        this.emit('connection', conn)
+        callback(null, conn)
+      })
+    })
+  }
+
+  /**
+   * Event handler for state transition errors
+   *
+   * @param {Error} err
+   * @returns {void}
+   */
+  _onStateError (err) {
+    this.emit('error', INVALID_STATE_TRANSITION(err))
+    this.log(err)
+  }
+}
+
+module.exports = withIs(ConnectionFSM, {
+  className: 'ConnectionFSM',
+  symbolName: 'libp2p-switch/ConnectionFSM'
+})

src/switch/connection/manager.js

@@ -0,0 +1,289 @@
+'use strict'
+
+const identify = require('../../identify')
+const multistream = require('multistream-select')
+const debug = require('debug')
+const log = debug('libp2p:switch:conn-manager')
+const once = require('once')
+const ConnectionFSM = require('../connection')
+const { msHandle, msSelect, identifyDialer } = require('../utils')
+
+const Circuit = require('../../circuit')
+
+const plaintext = require('../plaintext')
+
+/**
+ * Contains methods for binding handlers to the Switch
+ * in order to better manage its connections.
+ */
+class ConnectionManager {
+  constructor (_switch) {
+    this.switch = _switch
+    this.connections = {}
+  }
+
+  /**
+   * Adds the connection for tracking if it's not already added
+   * @private
+   * @param {ConnectionFSM} connection
+   * @returns {void}
+   */
+  add (connection) {
+    this.connections[connection.theirB58Id] = this.connections[connection.theirB58Id] || []
+    // Only add it if it's not there
+    if (!this.get(connection)) {
+      this.connections[connection.theirB58Id].push(connection)
+      this.switch.emit('connection:start', connection.theirPeerInfo)
+      if (connection.getState() === 'MUXED') {
+        this.switch.emit('peer-mux-established', connection.theirPeerInfo)
+        // Clear the denylist of the peer
+        this.switch.dialer.clearDenylist(connection.theirPeerInfo)
+      } else {
+        connection.once('muxed', () => {
+          this.switch.emit('peer-mux-established', connection.theirPeerInfo)
+          // Clear the denylist of the peer
+          this.switch.dialer.clearDenylist(connection.theirPeerInfo)
+        })
+      }
+    }
+  }
+
+  /**
+   * Gets the connection from the list if it exists
+   * @private
+   * @param {ConnectionFSM} connection
+   * @returns {ConnectionFSM|null} The found connection or null
+   */
+  get (connection) {
+    if (!this.connections[connection.theirB58Id]) return null
+
+    for (let i = 0; i < this.connections[connection.theirB58Id].length; i++) {
+      if (this.connections[connection.theirB58Id][i] === connection) {
+        return this.connections[connection.theirB58Id][i]
+      }
+    }
+    return null
+  }
+
+  /**
+   * Gets a connection associated with the given peer
+   * @private
+   * @param {string} peerId The peers id
+   * @returns {ConnectionFSM|null} The found connection or null
+   */
+  getOne (peerId) {
+    if (this.connections[peerId]) {
+      // Only return muxed connections
+      for (var i = 0; i < this.connections[peerId].length; i++) {
+        if (this.connections[peerId][i].getState() === 'MUXED') {
+          return this.connections[peerId][i]
+        }
+      }
+    }
+    return null
+  }
+
+  /**
+   * Removes the connection from tracking
+   * @private
+   * @param {ConnectionFSM} connection The connection to remove
+   * @returns {void}
+   */
+  remove (connection) {
+    // No record of the peer, disconnect it
+    if (!this.connections[connection.theirB58Id]) {
+      if (connection.theirPeerInfo) {
+        connection.theirPeerInfo.disconnect()
+        this.switch.emit('peer-mux-closed', connection.theirPeerInfo)
+      }
+      return
+    }
+
+    for (let i = 0; i < this.connections[connection.theirB58Id].length; i++) {
+      if (this.connections[connection.theirB58Id][i] === connection) {
+        this.connections[connection.theirB58Id].splice(i, 1)
+        break
+      }
+    }
+
+    // The peer is fully disconnected
+    if (this.connections[connection.theirB58Id].length === 0) {
+      delete this.connections[connection.theirB58Id]
+      connection.theirPeerInfo.disconnect()
+      this.switch.emit('peer-mux-closed', connection.theirPeerInfo)
+    }
+
+    // A tracked connection was closed, let the world know
+    this.switch.emit('connection:end', connection.theirPeerInfo)
+  }
+
+  /**
+   * Returns all connections being tracked
+   * @private
+   * @returns {ConnectionFSM[]}
+   */
+  getAll () {
+    let connections = []
+    for (const conns of Object.values(this.connections)) {
+      connections = [...connections, ...conns]
+    }
+    return connections
+  }
+
+  /**
+   * Returns all connections being tracked for a given peer id
+   * @private
+   * @param {string} peerId Stringified peer id
+   * @returns {ConnectionFSM[]}
+   */
+  getAllById (peerId) {
+    return this.connections[peerId] || []
+  }
+
+  /**
+   * Adds a listener for the given `muxer` and creates a handler for it
+   * leveraging the Switch.protocolMuxer handler factory
+   *
+   * @param {Muxer} muxer
+   * @returns {void}
+   */
+  addStreamMuxer (muxer) {
+    // for dialing
+    this.switch.muxers[muxer.multicodec] = muxer
+
+    // for listening
+    this.switch.handle(muxer.multicodec, (protocol, conn) => {
+      const muxedConn = muxer.listener(conn)
+
+      muxedConn.on('stream', this.switch.protocolMuxer(null))
+
+      // If identify is enabled
+      //   1. overload getPeerInfo
+      //   2. call getPeerInfo
+      //   3. add this conn to the pool
+      if (this.switch.identify) {
+        // Get the peer info from the crypto exchange
+        conn.getPeerInfo((err, cryptoPI) => {
+          if (err || !cryptoPI) {
+            log('crypto peerInfo wasnt found')
+          }
+
+          // overload peerInfo to use Identify instead
+          conn.getPeerInfo = async (callback) => {
+            const conn = muxedConn.newStream()
+            const ms = new multistream.Dialer()
+            callback = once(callback)
+
+            let results
+            try {
+              await msHandle(ms, conn)
+              const msConn = await msSelect(ms, identify.multicodec)
+              results = await identifyDialer(msConn, cryptoPI)
+            } catch (err) {
+              return muxedConn.end(() => {
+                callback(err, null)
+              })
+            }
+
+            const { peerInfo } = results
+
+            if (peerInfo) {
+              conn.setPeerInfo(peerInfo)
+            }
+            callback(null, peerInfo)
+          }
+
+          conn.getPeerInfo((err, peerInfo) => {
+            /* eslint no-warning-comments: off */
+            if (err) {
+              return log('identify not successful')
+            }
+            const b58Str = peerInfo.id.toB58String()
+            peerInfo = this.switch._peerBook.put(peerInfo)
+
+            const connection = new ConnectionFSM({
+              _switch: this.switch,
+              peerInfo,
+              muxer: muxedConn,
+              conn: conn,
+              type: 'inc'
+            })
+            this.switch.connection.add(connection)
+
+            // Only update if it's not already connected
+            if (!peerInfo.isConnected()) {
+              if (peerInfo.multiaddrs.size > 0) {
+                // with incomming conn and through identify, going to pick one
+                // of the available multiaddrs from the other peer as the one
+                // I'm connected to as we really can't be sure at the moment
+                // TODO add this consideration to the connection abstraction!
+                peerInfo.connect(peerInfo.multiaddrs.toArray()[0])
+              } else {
+                // for the case of websockets in the browser, where peers have
+                // no addr, use just their IPFS id
+                peerInfo.connect(`/ipfs/${b58Str}`)
+              }
+            }
+
+            muxedConn.once('close', () => {
+              connection.close()
+            })
+          })
+        })
+      }
+
+      return conn
+    })
+  }
+
+  /**
+   * Adds the `encrypt` handler for the given `tag` and also sets the
+   * Switch's crypto to passed `encrypt` function
+   *
+   * @param {String} tag
+   * @param {function(PeerID, Connection, PeerId, Callback)} encrypt
+   * @returns {void}
+   */
+  crypto (tag, encrypt) {
+    if (!tag && !encrypt) {
+      tag = plaintext.tag
+      encrypt = plaintext.encrypt
+    }
+
+    this.switch.crypto = { tag, encrypt }
+  }
+
+  /**
+   * If config.enabled is true, a Circuit relay will be added to the
+   * available Switch transports.
+   *
+   * @param {any} config
+   * @returns {void}
+   */
+  enableCircuitRelay (config) {
+    config = config || {}
+
+    if (config.enabled) {
+      if (!config.hop) {
+        Object.assign(config, { hop: { enabled: false, active: false } })
+      }
+
+      this.switch.transport.add(Circuit.tag, new Circuit(this.switch, config))
+    }
+  }
+
+  /**
+   * Sets identify to true on the Switch and performs handshakes
+   * for libp2p-identify leveraging the Switch's muxer.
+   *
+   * @returns {void}
+   */
+  reuse () {
+    this.switch.identify = true
+    this.switch.handle(identify.multicodec, (protocol, conn) => {
+      identify.listener(conn, this.switch._peerInfo)
+    })
+  }
+}
+
+module.exports = ConnectionManager

src/switch/constants.js

@@ -0,0 +1,12 @@
+'use strict'
+
+module.exports = {
+  DENY_TTL: 5 * 60 * 1e3, // How long before an errored peer can be dialed again
+  DENY_ATTEMPTS: 5, // Num of unsuccessful dials before a peer is permanently denied
+  DIAL_TIMEOUT: 30e3, // How long in ms a dial attempt is allowed to take
+  MAX_COLD_CALLS: 50, // How many dials w/o protocols that can be queued
+  MAX_PARALLEL_DIALS: 100, // Maximum allowed concurrent dials
+  QUARTER_HOUR: 15 * 60e3,
+  PRIORITY_HIGH: 10,
+  PRIORITY_LOW: 20
+}

src/switch/dialer/index.js

@@ -0,0 +1,119 @@
+'use strict'
+
+const DialQueueManager = require('./queueManager')
+const { getPeerInfo } = require('../../get-peer-info')
+const {
+  DENY_ATTEMPTS,
+  DENY_TTL,
+  MAX_COLD_CALLS,
+  MAX_PARALLEL_DIALS,
+  PRIORITY_HIGH,
+  PRIORITY_LOW
+} = require('../constants')
+
+module.exports = function (_switch) {
+  const dialQueueManager = new DialQueueManager(_switch)
+
+  _switch.state.on('STARTED:enter', start)
+  _switch.state.on('STOPPING:enter', stop)
+
+  /**
+   * @param {DialRequest} dialRequest
+   * @returns {void}
+   */
+  function _dial ({ peerInfo, protocol, options, callback }) {
+    if (typeof protocol === 'function') {
+      callback = protocol
+      protocol = null
+    }
+
+    try {
+      peerInfo = getPeerInfo(peerInfo, _switch._peerBook)
+    } catch (err) {
+      return callback(err)
+    }
+
+    // Add it to the queue, it will automatically get executed
+    dialQueueManager.add({ peerInfo, protocol, options, callback })
+  }
+
+  /**
+   * Starts the `DialQueueManager`
+   *
+   * @param {function} callback
+   */
+  function start (callback) {
+    dialQueueManager.start()
+    callback()
+  }
+
+  /**
+   * Aborts all dials that are queued. This should
+   * only be used when the Switch is being stopped
+   *
+   * @param {function} callback
+   */
+  function stop (callback) {
+    dialQueueManager.stop()
+    callback()
+  }
+
+  /**
+   * Clears the denylist for a given peer
+   * @param {PeerInfo} peerInfo
+   */
+  function clearDenylist (peerInfo) {
+    dialQueueManager.clearDenylist(peerInfo)
+  }
+
+  /**
+   * Attempts to establish a connection to the given `peerInfo` at
+   * a lower priority than a standard dial.
+   * @param {PeerInfo} peerInfo
+   * @param {object} options
+   * @param {boolean} options.useFSM Whether or not to return a `ConnectionFSM`. Defaults to false.
+   * @param {number} options.priority Lowest priority goes first. Defaults to 20.
+   * @param {function(Error, Connection)} callback
+   */
+  function connect (peerInfo, options, callback) {
+    if (typeof options === 'function') {
+      callback = options
+      options = null
+    }
+    options = { useFSM: false, priority: PRIORITY_LOW, ...options }
+    _dial({ peerInfo, protocol: null, options, callback })
+  }
+
+  /**
+   * Adds the dial request to the queue for the given `peerInfo`
+   * The request will be added with a high priority (10).
+   * @param {PeerInfo} peerInfo
+   * @param {string} protocol
+   * @param {function(Error, Connection)} callback
+   */
+  function dial (peerInfo, protocol, callback) {
+    _dial({ peerInfo, protocol, options: { useFSM: false, priority: PRIORITY_HIGH }, callback })
+  }
+
+  /**
+   * Behaves like dial, except it calls back with a ConnectionFSM
+   *
+   * @param {PeerInfo} peerInfo
+   * @param {string} protocol
+   * @param {function(Error, ConnectionFSM)} callback
+   */
+  function dialFSM (peerInfo, protocol, callback) {
+    _dial({ peerInfo, protocol, options: { useFSM: true, priority: PRIORITY_HIGH }, callback })
+  }
+
+  return {
+    connect,
+    dial,
+    dialFSM,
+    clearDenylist,
+    DENY_ATTEMPTS: isNaN(_switch._options.denyAttempts) ? DENY_ATTEMPTS : _switch._options.denyAttempts,
+    DENY_TTL: isNaN(_switch._options.denyTTL) ? DENY_TTL : _switch._options.denyTTL,
+    MAX_COLD_CALLS: isNaN(_switch._options.maxColdCalls) ? MAX_COLD_CALLS : _switch._options.maxColdCalls,
+    MAX_PARALLEL_DIALS: isNaN(_switch._options.maxParallelDials) ? MAX_PARALLEL_DIALS : _switch._options.maxParallelDials
+  }
+}

src/switch/dialer/queue.js

@@ -0,0 +1,281 @@
+'use strict'
+
+const ConnectionFSM = require('../connection')
+const { DIAL_ABORTED, ERR_DENIED } = require('../errors')
+const nextTick = require('async/nextTick')
+const once = require('once')
+const debug = require('debug')
+const log = debug('libp2p:switch:dial')
+log.error = debug('libp2p:switch:dial:error')
+
+/**
+ * Components required to execute a dial
+ * @typedef {Object} DialRequest
+ * @property {PeerInfo} peerInfo - The peer to dial to
+ * @property {string} [protocol] - The protocol to create a stream for
+ * @property {object} options
+ * @property {boolean} options.useFSM - If `callback` should return a ConnectionFSM
+ * @property {number} options.priority - The priority of the dial
+ * @property {function(Error, Connection|ConnectionFSM)} callback
+ */
+
+/**
+ * @typedef {Object} NewConnection
+ * @property {ConnectionFSM} connectionFSM
+ * @property {boolean} didCreate
+ */
+
+/**
+ * Attempts to create a new connection or stream (when muxed),
+ * via negotiation of the given `protocol`. If no `protocol` is
+ * provided, no action will be taken and `callback` will be called
+ * immediately with no error or values.
+ *
+ * @param {object} options
+ * @param {string} options.protocol
+ * @param {ConnectionFSM} options.connection
+ * @param {function(Error, Connection)} options.callback
+ * @returns {void}
+ */
+function createConnectionWithProtocol ({ protocol, connection, callback }) {
+  if (!protocol) {
+    return callback()
+  }
+  connection.shake(protocol, (err, conn) => {
+    if (!conn) {
+      return callback(err)
+    }
+
+    conn.setPeerInfo(connection.theirPeerInfo)
+    callback(null, conn)
+  })
+}
+
+/**
+ * A convenience array wrapper for controlling
+ * a per peer queue
+ *
+ * @returns {Queue}
+ */
+class Queue {
+  /**
+   * @constructor
+   * @param {string} peerId
+   * @param {Switch} _switch
+   * @param {function(string)} onStopped Called when the queue stops
+   */
+  constructor (peerId, _switch, onStopped) {
+    this.id = peerId
+    this.switch = _switch
+    this._queue = []
+    this.denylisted = null
+    this.denylistCount = 0
+    this.isRunning = false
+    this.onStopped = onStopped
+  }
+
+  get length () {
+    return this._queue.length
+  }
+
+  /**
+   * Adds the dial request to the queue. The queue is not automatically started
+   * @param {string} protocol
+   * @param {boolean} useFSM If callback should use a ConnectionFSM instead
+   * @param {function(Error, Connection)} callback
+   * @returns {void}
+   */
+  add (protocol, useFSM, callback) {
+    if (!this.isDialAllowed()) {
+      return nextTick(callback, ERR_DENIED())
+    }
+    this._queue.push({ protocol, useFSM, callback })
+  }
+
+  /**
+   * Determines whether or not dialing is currently allowed
+   * @returns {boolean}
+   */
+  isDialAllowed () {
+    if (this.denylisted) {
+      // If the deny ttl has passed, reset it
+      if (Date.now() > this.denylisted) {
+        this.denylisted = null
+        return true
+      }
+      // Dial is not allowed
+      return false
+    }
+    return true
+  }
+
+  /**
+   * Starts the queue. If the queue was started `true` will be returned.
+   * If the queue was already running `false` is returned.
+   * @returns {boolean}
+   */
+  start () {
+    if (!this.isRunning) {
+      log('starting dial queue to %s', this.id)
+      this.isRunning = true
+      this._run()
+      return true
+    }
+    return false
+  }
+
+  /**
+   * Stops the queue
+   */
+  stop () {
+    if (this.isRunning) {
+      log('stopping dial queue to %s', this.id)
+      this.isRunning = false
+      this.onStopped(this.id)
+    }
+  }
+
+  /**
+   * Stops the queue and errors the callback for each dial request
+   */
+  abort () {
+    while (this.length > 0) {
+      const dial = this._queue.shift()
+      dial.callback(DIAL_ABORTED())
+    }
+    this.stop()
+  }
+
+  /**
+   * Marks the queue as denylisted. The queue will be immediately aborted.
+   * @returns {void}
+   */
+  denylist () {
+    this.denylistCount++
+
+    if (this.denylistCount >= this.switch.dialer.DENY_ATTEMPTS) {
+      this.denylisted = Infinity
+      return
+    }
+
+    let ttl = this.switch.dialer.DENY_TTL * Math.pow(this.denylistCount, 3)
+    const minTTL = ttl * 0.9
+    const maxTTL = ttl * 1.1
+
+    // Add a random jitter of 20% to the ttl
+    ttl = Math.floor(Math.random() * (maxTTL - minTTL) + minTTL)
+
+    this.denylisted = Date.now() + ttl
+    this.abort()
+  }
+
+  /**
+   * Attempts to find a muxed connection for the given peer. If one
+   * isn't found, a new one will be created.
+   *
+   * Returns an array containing two items. The ConnectionFSM and wether
+   * or not the ConnectionFSM was just created. The latter can be used
+   * to determine dialing needs.
+   *
+   * @private
+   * @param {PeerInfo} peerInfo
+   * @returns {NewConnection}
+   */
+  _getOrCreateConnection (peerInfo) {
+    let connectionFSM = this.switch.connection.getOne(this.id)
+    let didCreate = false
+
+    if (!connectionFSM) {
+      connectionFSM = new ConnectionFSM({
+        _switch: this.switch,
+        peerInfo,
+        muxer: null,
+        conn: null
+      })
+
+      this.switch.connection.add(connectionFSM)
+
+      // Add control events and start the dialer
+      connectionFSM.once('connected', () => connectionFSM.protect())
+      connectionFSM.once('private', () => connectionFSM.encrypt())
+      connectionFSM.once('encrypted', () => connectionFSM.upgrade())
+
+      didCreate = true
+    }
+
+    return { connectionFSM, didCreate }
+  }
+
+  /**
+   * Executes the next dial in the queue for the given peer
+   * @private
+   * @returns {void}
+   */
+  _run () {
+    // If we have no items in the queue or we're stopped, exit
+    if (this.length < 1 || !this.isRunning) {
+      log('stopping the queue for %s', this.id)
+      return this.stop()
+    }
+
+    const next = once(() => {
+      log('starting next dial to %s', this.id)
+      this._run()
+    })
+
+    const peerInfo = this.switch._peerBook.get(this.id)
+    const queuedDial = this._queue.shift()
+    const { connectionFSM, didCreate } = this._getOrCreateConnection(peerInfo)
+
+    // If the dial expects a ConnectionFSM, we can provide that back now
+    if (queuedDial.useFSM) {
+      nextTick(queuedDial.callback, null, connectionFSM)
+    }
+
+    // If we can handshake protocols, get a new stream and call run again
+    if (['MUXED', 'CONNECTED'].includes(connectionFSM.getState())) {
+      queuedDial.connection = connectionFSM
+      createConnectionWithProtocol(queuedDial)
+      next()
+      return
+    }
+
+    // If we error, error the queued dial
+    // In the future, it may be desired to error the other queued dials,
+    // depending on the error.
+    connectionFSM.once('error', (err) => {
+      queuedDial.callback(err)
+      // Dont denylist peers we have identified and that we are connected to
+      if (peerInfo.protocols.size > 0 && peerInfo.isConnected()) {
+        return
+      }
+      this.denylist()
+    })
+
+    connectionFSM.once('close', () => {
+      next()
+    })
+
+    // If we're not muxed yet, add listeners
+    connectionFSM.once('muxed', () => {
+      this.denylistCount = 0 // reset denylisting on good connections
+      queuedDial.connection = connectionFSM
+      createConnectionWithProtocol(queuedDial)
+      next()
+    })
+
+    connectionFSM.once('unmuxed', () => {
+      this.denylistCount = 0
+      queuedDial.connection = connectionFSM
+      createConnectionWithProtocol(queuedDial)
+      next()
+    })
+
+    // If we have a new connection, start dialing
+    if (didCreate) {
+      connectionFSM.dial()
+    }
+  }
+}
+
+module.exports = Queue