refactor: add core modules to libp2p (#400)

* refactor: add js-libp2p-connection-manager to repo

Co-authored-by: David Dias <daviddias.p@gmail.com>
Co-authored-by: Jacob Heun <jacobheun@gmail.com>
Co-authored-by: Pedro Teixeira <i@pgte.me>
Co-authored-by: Vasco Santos <vasco.santos@ua.pt>

* test(conn-mgr): only run in node

* refactor: add js-libp2p-identify to repo

Co-authored-by: David Dias <daviddias.p@gmail.com>
Co-authored-by: Friedel Ziegelmayer <dignifiedquire@gmail.com>
Co-authored-by: Hugo Dias <hugomrdias@gmail.com>
Co-authored-by: Jacob Heun <jacobheun@gmail.com>
Co-authored-by: Maciej Krüger <mkg20001@gmail.com>
Co-authored-by: Richard Littauer <richard.littauer@gmail.com>
Co-authored-by: Vasco Santos <vasco.santos@moxy.studio>
Co-authored-by: Yusef Napora <yusef@protocol.ai>
Co-authored-by: ᴠɪᴄᴛᴏʀ ʙᴊᴇʟᴋʜᴏʟᴍ <victorbjelkholm@gmail.com>

* refactor: add libp2p-pnet to repo

Co-authored-by: Jacob Heun <jacobheun@gmail.com>
Co-authored-by: Vasco Santos <vasco.santos@moxy.studio>

* refactor: add libp2p-ping to repo

Co-authored-by: David Dias <daviddias.p@gmail.com>
Co-authored-by: Francisco Baio Dias <xicombd@gmail.com>
Co-authored-by: Friedel Ziegelmayer <dignifiedquire@gmail.com>
Co-authored-by: Hugo Dias <mail@hugodias.me>
Co-authored-by: Jacob Heun <jacobheun@gmail.com>
Co-authored-by: João Antunes <j.goncalo.antunes@gmail.com>
Co-authored-by: Richard Littauer <richard.littauer@gmail.com>
Co-authored-by: Vasco Santos <vasco.santos@moxy.studio>
Co-authored-by: Vasco Santos <vasco.santos@ua.pt>
Co-authored-by: ᴠɪᴄᴛᴏʀ ʙᴊᴇʟᴋʜᴏʟᴍ <victorbjelkholm@gmail.com>

* refactor: add libp2p-circuit to repo

Co-authored-by: David Dias <daviddias.p@gmail.com>
Co-authored-by: Dmitriy Ryajov <dryajov@gmail.com>
Co-authored-by: Friedel Ziegelmayer <dignifiedquire@gmail.com>
Co-authored-by: Hugo Dias <mail@hugodias.me>
Co-authored-by: Jacob Heun <jacobheun@gmail.com>
Co-authored-by: Maciej Krüger <mkg20001@gmail.com>
Co-authored-by: Oli Evans <oli@tableflip.io>
Co-authored-by: Pedro Teixeira <i@pgte.me>
Co-authored-by: Vasco Santos <vasco.santos@ua.pt>
Co-authored-by: Victor Bjelkholm <victorbjelkholm@gmail.com>
Co-authored-by: Yusef Napora <yusef@napora.org>
Co-authored-by: dirkmc <dirk@mccormick.cx>

* test(switch): avoid using instanceof

* chore(switch): update bignumber dep

* refactor(circuit): clean up tests

* refactor(switch): consolidate get peer utils

* test(identify): do deep checks of addresses

* test(identify): bump timeout for identify test

* test(switch): tidy up limit dialer test

* refactor(switch): remove redundant circuit tests

* chore: add coverage script

* refactor(circuit): consolidate get peer info

* docs: reference original repositories in each sub readme

* docs: fix comment

* refactor: clean up sub package.json files and readmes

test/identify/listener.spec.js

@@ -0,0 +1,70 @@
+/* eslint-env mocha */
+'use strict'
+
+const pull = require('pull-stream/pull')
+const collect = require('pull-stream/sinks/collect')
+const chai = require('chai')
+const dirtyChai = require('dirty-chai')
+const expect = chai.expect
+chai.use(dirtyChai)
+const pair = require('pull-pair/duplex')
+const PeerInfo = require('peer-info')
+const lp = require('pull-length-prefixed')
+const multiaddr = require('multiaddr')
+
+const msg = require('libp2p-identify').message
+const identify = require('libp2p-identify')
+
+describe('identify.listener', () => {
+  let info
+
+  beforeEach(function (done) {
+    this.timeout(20 * 1000)
+
+    PeerInfo.create((err, _info) => {
+      if (err) {
+        return done(err)
+      }
+
+      _info.protocols.add('/echo/1.0.0')
+      _info.protocols.add('/chat/1.0.0')
+
+      info = _info
+      done()
+    })
+  })
+
+  it('works', (done) => {
+    const p = pair()
+
+    info.multiaddrs.add(multiaddr('/ip4/127.0.0.1/tcp/5002'))
+
+    pull(
+      p[1],
+      lp.decode(),
+      collect((err, result) => {
+        expect(err).to.not.exist()
+
+        const input = msg.decode(result[0])
+        expect(
+          input
+        ).to.be.eql({
+          protocolVersion: 'ipfs/0.1.0',
+          agentVersion: 'na',
+          publicKey: info.id.pubKey.bytes,
+          listenAddrs: [multiaddr('/ip4/127.0.0.1/tcp/5002').buffer],
+          observedAddr: multiaddr('/ip4/127.0.0.1/tcp/5001').buffer,
+          protocols: ['/echo/1.0.0', '/chat/1.0.0']
+        })
+        done()
+      })
+    )
+
+    const conn = p[0]
+    conn.getObservedAddrs = (cb) => {
+      cb(null, [multiaddr('/ip4/127.0.0.1/tcp/5001')])
+    }
+
+    identify.listener(conn, info)
+  })
+})