Our Customers Include...

• Microsoft
• AdYen
• Gyft

Richard Stallman

Free Software Foundation

Ken Thompson and Dennis Ritchie

Creators of Unix

Given enough eyeballs, all bugs are shallow.
                  – Eric Raymond, "Linus' Law"

Open source systems are a requirement.

What Is Open Source & Why Do I Feel So Guilty?

goo.gl/ur5ldW

Built for BitPay's needs:

Secure, modular, and extensible

Abstract classes for taking Bitcoin beyond currency

PublicKey , PrivateKey , Script , Peer , ...

Foxtrot
      by bitpay

secure routing network

same cryptography as Bitcoin (ecdsa, secp256k1)

Public keys, not IP addresses!

github.com/bitpay/foxtrot

var Foxtrot = require('foxtrot');
var foxtrot = new Foxtrot({
  discovery: {
    tcpserver: 'bootstrap.localhost.localdomain'
  }
});

foxtrot.on('peerConnect',    logPeerConnection );
foxtrot.on('peerDisconnect', logPeerDisconnection );

var client = foxtrot.connect({
  address: '404371705fa9bd789a2fcd52d2c580b65d35549d'
}, function() {
  // hey!  we're connected.  let's say hello.
  client.write('hello, network!');
});

client.on('data', function(data) {
  console.log('data received: ', data.content );
});
            

Building a Rural Wireless Mesh Network

A do-it-yourself guide to planning and building a Freifunk-based mesh network

wirelessafrica.meraka.org.za

Mesh Networks

...become really interesting when
combined with Payment Channels.

some other projects

disintermediate the ISPs

ChainDB
      by bitpay

blockchain database framework

define your own, custom transaction rules

Secured by the Bitcoin Blockchain.

What is a blockchain?

• Distributed system
• Tamper-resistant history
• Rewind, Replay, Resume
• Data Consistency

var ChainDB = require('chaindb');
var chaindb = new ChainDB({
  consensus: {
    type: 'pof', // proof of fee
    xprivkey: 'someprivkey', // bitcoin HD private key with funds
  },
  db: {
    type: 'script', // script based transactions based on bitcoin
    path: './pof-script.db' // actual on-disk datastore
  }
});

var address = chaindb.genesis.getCoinbaseAddress();
var destination = 'some receiving address';

chaindb.on('ready', function() {
  chaindb.sendFunds( destination , 1000000 , function(err, transaction) {
    ...
  });
});

chaindb.initialize();
            

Proof of Fee

resolve chain conflicts not based on block height,

but based on the Bitcoin spent for the entire chain,

weighted towards older blocks.

Applications (Short Term)

• Key-value stores
  • Proof of Existence
  • DNS for Public Key Hashes
  • DNS for, well, DNS
• Document stores
  • Tamper-proofing existing databases
  • Atomic snapshots
  • Verifiable state history

Applications (Long Term)

• Replace the SSL/TLS PKI (eliminate CAs)
• Identity Assertion
• Proof of Ownership
  • Deeds
  • Titles
  • Equity
• Smart Contracts

Challenges

1. Blockchain Bloat
2. High-volume changes are difficult!
3. 10 minute transaction times might be too slow

Other Projects

Smart Contracts

"Bitcoin 2.0"

Prediction Markets

Augur    augur.net

Decentralized Exchanges

Double-deposit smart contracts

Elimination of clearing houses

Coinffeine    coinffeine.com

OpenBazaar    openbazaar.org

Challenges

• trusted oracles
• performance
• legal cruft

Projects