refactor: use async await (#108)

* chore: upgrade deps

* feat: first iteration of the idea

* feat: iterate a layer deeper

* feat: rewrite handshake

* feat: rewrite propose

* feat: rewrite finish

* feat: rewrite exchange

* feat: rewrite low-level stuff

* feat: work on rewriting tests

* refactor: browser tests

* refactor: .aegir.js

* feat: refactor benchmarks

* fix: try to make it work

* fix: lint

* refactor: move tests

* refactor: switch deps

* refactor: entry file

* refactor: a bit more

* fix: tests

* feat: inital iterables refactor

* refactor: streaming

* refactor: cleanup

* fix: turn bufferlist into buffer

* fix: use errors from interfaces

* refactor: etm

* fix: typo

* fix: .read error

* fix: satisfy output expectations

* fix: it works - WARNING: using varint instead of fixed lp, tests lie

* fix: use errors

* refactor: benchmarks

* fix: add suggestions from review

Co-Authored-By: Jacob Heun <jacobheun@gmail.com>

* fix: upgrade deps and use correct lp-encoder

* refactor: apply changes from review

* refactor: apply changes from review

* refactor: apply changes from review

* chore: remove old tests

test: add support tests back

* test: fix async benchmarks

* chore: clean up deps

* fix: use fixed encoding/decoding everywhere

fix: exchange final nonce handshake over encryption

* test: add verify inbound and outbound secio

* test: verify nonces are boxed

* chore: add node 12 to ci

.travis.yml

@@ -9,6 +9,7 @@ stages:
 
 node_js:
   - '10'
+  - '12'
 
 os:
   - linux

README.md

@@ -42,44 +42,9 @@ const secio = require('libp2p-secio')
 
 ## API
 
-### `.tag`
+This module exposes a crypto interface, as defined in the [js-interfaces](https://github.com/libp2p/js-interfaces)
 
-The current `secio` tag, usable in `multistream`.
-
-### `const encryptedConnection = secio.encrypt(localPeerId, plainTextConnection [, remotePeerId] [, callback])`
-
-- `localPeerId: PeerId` - A PeerId object containing the Private, Public and Id of our node.
-- `plainTextConnection: Connection` - The insecure connection to be secured.
-- `remotePeerId: PeerId` - A PeerId object containing the Public and/or Id of the node we are doing the SECIO handshake with.
-- `callback: Function` - Optional, Called if an error happens during the initialization.
-
-Returns an encrypted [Connection object](https://github.com/libp2p/interface-connection) that is the upgraded `plainTextConnection` with now having every byte encrypted.
-
-Both plainTextConnection and encryptedConnection are at their base, PullStreams.
-
-### 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.
+[ » API Docs ](https://github.com/libp2p/js-interfaces/tree/master/src/crypto#api)
 
 ## Contribute
 

benchmarks/send.js

@@ -1,73 +1,70 @@
 'use strict'
 
+/* eslint-disable no-console */
+
 const Benchmark = require('benchmark')
-const pull = require('pull-stream/pull')
-const infinite = require('pull-stream/sources/infinite')
-const take = require('pull-stream/throughs/take')
-const drain = require('pull-stream/sinks/drain')
-const Connection = require('interface-connection').Connection
-const parallel = require('async/parallel')
-const pair = require('pull-pair/duplex')
 const PeerId = require('peer-id')
 
-const secio = require('../src')
+const pipe = require('it-pipe')
+const { reduce } = require('streaming-iterables')
+const DuplexPair = require('it-pair/duplex')
+
+const secio = require('..')
 
 const suite = new Benchmark.Suite('secio')
 let peers
 
-function sendData (a, b, opts, finish) {
+async function sendData (a, b, opts) {
   opts = Object.assign({ times: 1, size: 100 }, opts)
 
-  pull(
-    infinite(() => Buffer.allocUnsafe(opts.size)),
-    take(opts.times),
+  let i = opts.times
+
+  pipe(
+    function * () {
+      while (i--) {
+        yield Buffer.allocUnsafe(opts.size)
+      }
+    },
     a
   )
 
-  let length = 0
-
-  pull(
+  const res = await pipe(
     b,
-    drain((data) => {
-      length += data.length
-    }, () => {
-      if (length !== opts.times * opts.size) {
-        throw new Error('Did not receive enough chunks')
-      }
-      finish.resolve()
-    })
+    reduce((acc, val) => acc + val.length, 0)
   )
-}
 
-function ifErr (err) {
-  if (err) {
-    throw err
+  if (res !== opts.times * opts.size) {
+    throw new Error('Did not receive enough chunks')
   }
 }
 
-suite.add('create peers for test', (deferred) => {
-  parallel([
-    (cb) => PeerId.createFromJSON(require('./peer-a'), cb),
-    (cb) => PeerId.createFromJSON(require('./peer-b'), cb)
-  ], (err, _peers) => {
-    if (err) { throw err }
-    peers = _peers
-
+suite.add('create peers for test', {
+  defer: true,
+  fn: async (deferred) => {
+    peers = await Promise.all([
+      PeerId.createFromJSON(require('./peer-a')),
+      PeerId.createFromJSON(require('./peer-b'))
+    ])
     deferred.resolve()
-  })
-}, { defer: true })
-
-suite.add('establish an encrypted channel', (deferred) => {
-  const p = pair()
+  }
+})
+suite.add('establish an encrypted channel', {
+  defer: true,
+  fn: async (deferred) => {
+    const p = DuplexPair()
 
-  const peerA = peers[0]
-  const peerB = peers[1]
+    const peerA = peers[0]
+    const peerB = peers[1]
 
-  const aToB = secio.encrypt(peerA, new Connection(p[0]), peerB, ifErr)
-  const bToA = secio.encrypt(peerB, new Connection(p[1]), peerA, ifErr)
+    const [aToB, bToA] = await Promise.all([
+      secio.secureInbound(peerA, p[0], peerB),
+      secio.secureOutbound(peerB, p[1], peerA)
+    ])
 
-  sendData(aToB, bToA, {}, deferred)
-}, { defer: true })
+    await sendData(aToB.conn, bToA.conn, {})
+    deferred.resolve()
+  }
+})
 
 const cases = [
   [10, 262144],
@@ -81,23 +78,32 @@ cases.forEach((el) => {
   const times = el[0]
   const size = el[1]
 
-  suite.add(`send plaintext ${times} x ${size} bytes`, (deferred) => {
-    const p = pair()
+  suite.add(`send plaintext ${times} x ${size} bytes`, {
+    defer: true,
+    fn: async (deferred) => {
+      const p = DuplexPair()
+      await sendData(p[0], p[1], { times: times, size: size })
+      deferred.resolve()
+    }
+  })
 
-    sendData(p[0], p[1], { times: times, size: size }, deferred)
-  }, { defer: true })
+  suite.add(`send encrypted ${times} x ${size} bytes`, {
+    defer: true,
+    fn: async (deferred) => {
+      const p = DuplexPair()
 
-  suite.add(`send encrypted ${times} x ${size} bytes`, (deferred) => {
-    const p = pair()
+      const peerA = peers[0]
+      const peerB = peers[1]
 
-    const peerA = peers[0]
-    const peerB = peers[1]
+      const [aToB, bToA] = await Promise.all([
+        secio.secureInbound(peerA, p[0], peerB),
+        secio.secureOutbound(peerB, p[1], peerA)
+      ])
 
-    const aToB = secio.encrypt(peerA, new Connection(p[0]), peerB, ifErr)
-    const bToA = secio.encrypt(peerB, new Connection(p[1]), peerA, ifErr)
-
-    sendData(aToB, bToA, { times: times, size: size }, deferred)
-  }, { defer: true })
+      await sendData(aToB.conn, bToA.conn, { times: times, size: size })
+      deferred.resolve()
+    }
+  })
 })
 
 suite.on('cycle', (event) => {

package.json

@@ -25,31 +25,26 @@
   ],
   "license": "MIT",
   "dependencies": {
-    "async": "^2.6.2",
+    "bl": "^4.0.0",
     "debug": "^4.1.1",
-    "interface-connection": "~0.3.3",
-    "libp2p-crypto": "~0.16.1",
-    "multiaddr": "^6.0.6",
-    "multihashing-async": "~0.6.0",
-    "once": "^1.4.0",
-    "peer-id": "~0.12.2",
-    "peer-info": "~0.15.1",
-    "protons": "^1.0.1",
-    "pull-defer": "~0.2.3",
-    "pull-handshake": "^1.1.4",
-    "pull-length-prefixed": "^1.3.2",
-    "pull-stream": "^3.6.9",
-    "safe-buffer": "^5.1.2"
+    "it-buffer": "^0.1.1",
+    "it-length-prefixed": "^3.0.0",
+    "it-pair": "^1.0.0",
+    "it-pb-rpc": "^0.1.4",
+    "it-pipe": "^1.1.0",
+    "libp2p-crypto": "~0.17.1",
+    "libp2p-interfaces": "~0.1.3",
+    "multiaddr": "^7.2.1",
+    "multihashing-async": "~0.8.0",
+    "peer-id": "~0.13.5",
+    "protons": "^1.0.1"
   },
   "devDependencies": {
-    "aegir": "^18.2.2",
+    "aegir": "^20.4.1",
     "benchmark": "^2.1.4",
     "chai": "^4.2.0",
     "dirty-chai": "^2.0.1",
-    "libp2p-websockets": "~0.12.2",
-    "multistream-select": "~0.14.4",
-    "pull-goodbye": "~0.0.2",
-    "pull-pair": "^1.1.0"
+    "streaming-iterables": "^4.1.1"
   },
   "engines": {
     "node": ">=6.0.0",