docs: examples

README.md

@@ -30,6 +30,7 @@
 - [Bundles](#bundles)
 - [Usage](#usage)
   - [Install](#install)
+  - [Usage](#usage)
   - [API](#api)
 - [Development](#development)
   - [Tests](#tests)
@@ -46,7 +47,7 @@ We are in the process of writting better documentation, blog posts, tutorials an
 - [libp2p.io](https://libp2p.io)
 - [Specification (WIP)](https://github.com/libp2p/specs)
 - 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)
+  - [`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
   - [The overview of libp2p](https://github.com/libp2p/libp2p#description)
 
@@ -71,6 +72,10 @@ npm install --save libp2p
 
 ## Usage
 
+### [Tutorials and Examples](/examples)
+
+You can find multiple examples on the [examples folder](/examples) that will guide you through using libp2p for several scenarions.
+
 ### Extending libp2p skeleton
 
 libp2p becomes very simple and basically acts as a glue for every module that compose this library. Since it can be highly customized, it requires some setup. What we recommend is to have a libp2p build for the system you are developing taking into account in your needs (e.g. for a browser working version of libp2p that acts as the network layer of IPFS, we have a built and minified version that browsers can require).

examples/README.md

@@ -4,8 +4,23 @@ In this folder, you can find a variety of examples to help you get started in us
 
 Let us know if you find any issue or if you want to contribute and add a new tutorial, feel welcome to submit a PR, thank you!
 
-## Examples
+## Understanding how libp2p works
 
+- [Transports](./transports)
+- [Protocol and Stream Muxing](./protocol-and-stream-muxing)
+- [Encrypted Communications](./encrypted-communications)
+- [Discovery Mechanisms](./discovery-mechanisms)
+- [Peer Routing](./peer-routing)
+- [Content Routing](./content-routing)
+- [PubSub](./pubsub)
+- [NAT Traversal](./nat-traversal)
+- Circuit Relay (future)
+- Naming (future)
+
+## Other examples
+
+- [Running libp2p in the Browser](./libp2p-in-the-browser)
+- Running libp2p in the Electron (future)
 - [The standard echo net example with libp2p](./echo)
 - [A simple chat app with](./chat)
 - [See other nodes in the network using WebRTC Star discovery mechanism](./see-nodes)

examples/discovery-mechanisms/README.md

@@ -0,0 +1,2 @@
+# WIP - This example is still in the works
+![](http://1.bp.blogspot.com/-tNvSnCW0KlQ/U-KOKGVoJkI/AAAAAAAAA3Q/aiSLMeSJFtw/s1600/WIP-sign.jpg)

examples/encrypted-communications/README.md

@@ -0,0 +1,2 @@
+# WIP - This example is still in the works
+![](http://1.bp.blogspot.com/-tNvSnCW0KlQ/U-KOKGVoJkI/AAAAAAAAA3Q/aiSLMeSJFtw/s1600/WIP-sign.jpg)

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

@@ -0,0 +1,2 @@
+# WIP - This example is still in the works
+![](http://1.bp.blogspot.com/-tNvSnCW0KlQ/U-KOKGVoJkI/AAAAAAAAA3Q/aiSLMeSJFtw/s1600/WIP-sign.jpg)

examples/nat-traversal/README.md

@@ -0,0 +1,2 @@
+# WIP - This example is still in the works
+![](http://1.bp.blogspot.com/-tNvSnCW0KlQ/U-KOKGVoJkI/AAAAAAAAA3Q/aiSLMeSJFtw/s1600/WIP-sign.jpg)

examples/peer-routing/README.md

@@ -0,0 +1,2 @@
+# WIP - This example is still in the works
+![](http://1.bp.blogspot.com/-tNvSnCW0KlQ/U-KOKGVoJkI/AAAAAAAAA3Q/aiSLMeSJFtw/s1600/WIP-sign.jpg)

examples/protocol-and-stream-muxing/1.js

@@ -0,0 +1,96 @@
+'use strict'
+
+const libp2p = require('libp2p')
+const TCP = require('libp2p-tcp')
+const PeerInfo = require('peer-info')
+const waterfall = require('async/waterfall')
+const parallel = require('async/parallel')
+const pull = require('pull-stream')
+
+class MyBundle extends libp2p {
+  constructor (peerInfo) {
+    const modules = {
+      transport: [new TCP()]
+    }
+    super(modules, peerInfo)
+  }
+}
+
+function createNode (callback) {
+  let node
+
+  waterfall([
+    (cb) => PeerInfo.create(cb),
+    (peerInfo, cb) => {
+      peerInfo.multiaddrs.add('/ip4/0.0.0.0/tcp/0')
+      node = new MyBundle(peerInfo)
+      node.start(cb)
+    }
+  ], (err) => callback(err, node))
+}
+
+parallel([
+  (cb) => createNode(cb),
+  (cb) => createNode(cb)
+], (err, nodes) => {
+  if (err) { throw err }
+
+  const node1 = nodes[0]
+  const node2 = nodes[1]
+
+  // exact matching
+  node2.handle('/your-protocol', (protocol, conn) => {
+    pull(
+      conn,
+      pull.map((v) => v.toString()),
+      pull.log()
+    )
+  })
+
+  // semver matching
+  /*
+  node2.handle('/another-protocol/1.0.1', (protocol, conn) => {
+    pull(
+      conn,
+      pull.map((v) => v.toString()),
+      pull.log()
+    )
+  })
+  */
+
+  // custom func matching
+  /*
+  node2.handle('/custom-match-func', (protocol, conn) => {
+    pull(
+      conn,
+      pull.map((v) => v.toString()),
+      pull.log()
+    )
+  }, (myProtocol, requestedProtocol, callback) => {
+    if (myProtocol.indexOf(requestedProtocol)) {
+      callback(null, true)
+    } else {
+      callback(null, false)
+    }
+  })
+  */
+
+  node1.dial(node2.peerInfo, '/your-protocol', (err, conn) => {
+    if (err) { throw err }
+    pull(pull.values(['my own protocol, wow!']), conn)
+  })
+
+  /*
+  node1.dial(node2.peerInfo, '/another-protocol/1.0.0', (err, conn) => {
+    if (err) { throw err }
+    pull(pull.values(['semver me please']), conn)
+  })
+  */
+
+  /*
+  node1.dial(node2.peerInfo, '/custom-match-func/some-query', (err, conn) => {
+    if (err) { throw err }
+    pull(pull.values(['do I fall into your criteria?']), conn)
+  })
+  */
+})

examples/protocol-and-stream-muxing/2.js

@@ -0,0 +1,79 @@
+'use strict'
+
+const libp2p = require('libp2p')
+const TCP = require('libp2p-tcp')
+const SPDY = require('libp2p-spdy')
+const PeerInfo = require('peer-info')
+const waterfall = require('async/waterfall')
+const parallel = require('async/parallel')
+const series = require('async/series')
+const pull = require('pull-stream')
+
+class MyBundle extends libp2p {
+  constructor (peerInfo) {
+    const modules = {
+      transport: [new TCP()],
+      connection: {
+        muxer: [SPDY]
+      }
+    }
+    super(modules, peerInfo)
+  }
+}
+
+function createNode (callback) {
+  let node
+
+  waterfall([
+    (cb) => PeerInfo.create(cb),
+    (peerInfo, cb) => {
+      peerInfo.multiaddrs.add('/ip4/0.0.0.0/tcp/0')
+      node = new MyBundle(peerInfo)
+      node.start(cb)
+    }
+  ], (err) => callback(err, node))
+}
+
+parallel([
+  (cb) => createNode(cb),
+  (cb) => createNode(cb)
+], (err, nodes) => {
+  if (err) { throw err }
+
+  const node1 = nodes[0]
+  const node2 = nodes[1]
+
+  node2.handle('/a', (protocol, conn) => {
+    pull(
+      conn,
+      pull.map((v) => v.toString()),
+      pull.log()
+    )
+  })
+
+  node2.handle('/b', (protocol, conn) => {
+    pull(
+      conn,
+      pull.map((v) => v.toString()),
+      pull.log()
+    )
+  })
+
+  series([
+    (cb) => node1.dial(node2.peerInfo, '/a', (err, conn) => {
+      if (err) { throw err }
+      pull(pull.values(['protocol (a)']), conn)
+      cb()
+    }),
+    (cb) => node1.dial(node2.peerInfo, '/b', (err, conn) => {
+      if (err) { throw err }
+      pull(pull.values(['protocol (b)']), conn)
+      cb()
+    }),
+    (cb) => node1.dial(node2.peerInfo, '/b', (err, conn) => {
+      if (err) { throw err }
+      pull(pull.values(['another conn on protocol (b)']), conn)
+      cb()
+    })
+  ])
+})

examples/protocol-and-stream-muxing/3.js

@@ -0,0 +1,83 @@
+'use strict'
+
+const libp2p = require('libp2p')
+const TCP = require('libp2p-tcp')
+const SPDY = require('libp2p-spdy')
+const PeerInfo = require('peer-info')
+const waterfall = require('async/waterfall')
+const parallel = require('async/parallel')
+const series = require('async/series')
+const pull = require('pull-stream')
+
+class MyBundle extends libp2p {
+  constructor (peerInfo) {
+    const modules = {
+      transport: [new TCP()],
+      connection: {
+        muxer: [SPDY]
+      }
+    }
+    super(modules, peerInfo)
+  }
+}
+
+function createNode (callback) {
+  let node
+
+  waterfall([
+    (cb) => PeerInfo.create(cb),
+    (peerInfo, cb) => {
+      peerInfo.multiaddrs.add('/ip4/0.0.0.0/tcp/0')
+      node = new MyBundle(peerInfo)
+      node.start(cb)
+    }
+  ], (err) => callback(err, node))
+}
+
+parallel([
+  (cb) => createNode(cb),
+  (cb) => createNode(cb)
+], (err, nodes) => {
+  if (err) { throw err }
+
+  const node1 = nodes[0]
+  const node2 = nodes[1]
+
+  node1.handle('/node-1', (protocol, conn) => {
+    pull(
+      conn,
+      pull.map((v) => v.toString()),
+      pull.log()
+    )
+  })
+
+  node2.handle('/node-2', (protocol, conn) => {
+    pull(
+      conn,
+      pull.map((v) => v.toString()),
+      pull.log()
+    )
+  })
+
+  series([
+    (cb) => node1.dial(node2.peerInfo, '/node-2', (err, conn) => {
+      if (err) { throw err }
+      pull(pull.values(['from 1 to 2']), conn)
+      cb()
+    }),
+    (cb) => node2.dial(node1.peerInfo, '/node-1', (err, conn) => {
+      if (err) { throw err }
+      pull(pull.values(['from 2 to 1']), conn)
+      cb()
+    })
+  ], (err) => {
+    if (err) { throw err }
+    console.log('Addresses by which both peers are connected')
+    node1.peerBook
+         .getAllArray()
+         .forEach((peer) => console.log('node 1 to node 2:', peer.isConnected().toString()))
+    node2.peerBook
+         .getAllArray()
+         .forEach((peer) => console.log('node 2 to node 1:', peer.isConnected().toString()))
+  })
+})