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Expand Up @@ -55,15 +55,14 @@ Triva Q: How much is one Bitcoin worth today? Q: How much are 10 000 Bitcoin wor



# $20 Million Dolloar Pizza Day - Celebrating the Birth of Bitcoin Alchemy - $$$
# $20 Million Dollar Pizza Day - Celebrating the Birth of Bitcoin Alchemy - $$$

![](i/bitcoinmarket.png)

(Source: [coinmarketcap.com/currencies/bitcoin](https://coinmarketcap.com/currencies/bitcoin))




# Let's Build Your Own Blockchain in JavaScript (From Zero / Scratch)

Crypto God? JavaScript Ninja / Rockstar?
Expand All @@ -75,48 +74,6 @@ Yes, you can.



# Aside/Excursion - Land der Berge! Land der Blockchain! Blockchain! Blockchain! - Austria

> Diese Technologie hat unglaubliches Potenzial. Wir müssen schnell sein. Wer zögert, hat verloren!
>
> -- Harald Mahrer, Bundesminster Bundesminister für Wissenschaft, Forschung und Wirtschaft (bmwfw)

**Blockchain wird unsere Welt verändern.**
Von einer Idee hin zu einer Revolution. Blockchain ist aus unserer digitalen Welt nicht mehr wegzudenken...

**Ein dezentrales Netz für Österreich.**
Österreich ist am Sprung zur europäischen Innovationsspitze...

Das World Economic Forum prognostizierte, dass schon im Jahr 2025
insgesamt 10 Prozent des weltweiten Bruttoinlandsprodukts
mit Hilfe der Blockchain-Technologie abgewickelt werden.
Wenn wir uns heute nicht mit derartigen Technologien beschäftigen, tun es andere.

> Es gibt kein sichereres oder transparenteres System, um Daten zu verwalten.
>
> -- Harald Mahrer, Bundesminster Bundesminister für Wissenschaft, Forschung und Wirtschaft (bmwfw)

![](i/blockchainaustria.png)

(Source: [blockchain-austria.gv.at](https://www.blockchain-austria.gv.at))



# Aside/Excursion - Land der Berge! Land der Blockchain! Blockchain! Blockchain! - Austria

Keep Calm and Learn Git First.

> Wo ist die #Git Austria Initiative um (sicher & transparent)
> öffentliche Daten, Dokumente und Kode zu verwalten? #digital #austria #bmwfw
>
> -- [Gerald Bauer @ Vienna.html](https://twitter.com/viennahtml/status/910776683552264195)
![](i/xkcd1597.png)



# Code, Code, Code - A Blockchain in JavaScript in 20 Lines! A Blockchain is a Data Structure

What's Blockchain?
Expand Down Expand Up @@ -316,6 +273,21 @@ calcHashWithNonce( nonce=0 ) {
(Source: [awesome-blockchains/blockchain_with_proof_of_work.js](https://github.com/openblockchains/awesome-blockchains/blob/master/blockchain.js/blockchain_with_proof_of_work.js))


# The World's Worst Database - Bitcoin Blockchain Mining

- Uses approximately the same amount of electricity as could power an average American household
for a day per transaction
- Supports 3 transactions / second across a global network with millions of CPUs/purpose-built ASICs
- Takes over 10 minutes to "commit" a transaction
- Doesn't acknowledge accepted writes: requires you read your writes,
but at any given time you may be on a blockchain fork, meaning your write might not actually
make it into the "winning" fork of the blockchain (and no, just making it into the mempool doesn't count).
In other words: "blockchain technology" cannot by definition tell you if a given write is ever
accepted/committed except by reading it out of the blockchain itself (and even then)
- Can only be used as a transaction ledger denominated in a single currency,
or to store/timestamp a maximum of 80 bytes per transaction

(Source: [Tony Arcieri - On the dangers of a blockchain monoculture](https://tonyarcieri.com/on-the-dangers-of-a-blockchain-monoculture))


# Tulip Mania Quiz - Win 100 Schilling on the Blockchain!
Expand All @@ -332,23 +304,279 @@ Q: What's the Name of the Most Expensive Tulip?
- (A) Admiral van Eijck
- (B) Admiral of Admirals
- (C) Semper Augustus
- (C) Red Augustus
- (C) Semper Cesarus


# Tulips on the Blockchain! Adding Transactions

Learn by Example from the Real World (Anno 1637) - Buy! Sell! Hold! Enjoy the Beauty of Admiral of Admirals, Semper Augustus and More.

**Transactions (Hyper) Ledger Book**

# More
| From | To | What | Qty |
|---------------------|--------------|---------------------------|----:|
| Dutchgrown (†) | Vincent | Tulip Bloemendaal Sunset | 10 |
| Keukenhof (†) | Anne | Tulip Semper Augustus | 7 |
| | | | |
| Flowers (†) | Ruben | Tulip Admiral van Eijck | 5 |
| Vicent | Anne | Tulip Bloemendaal Sunset | 3 |
| Anne | Julia | Tulip Semper Augustus | 1 |
| Julia | Luuk | Tulip Semper Augustus | 1 |
| | | | |
| Bloom & Blossom (†) | Daisy | Tulip Admiral of Admirals | 8 |
| Vincent | Max | Tulip Bloemendaal Sunset | 2 |
| Anne | Martijn | Tulip Semper Augustus | 2 |
| Ruben | Julia | Tulip Admiral van Eijck | 2 |
| | | | |
| Teleflora (†) | Max | Tulip Red Impression | 11 |
| Anne | Naomi | Tulip Bloemendaal Sunset | 1 |
| Daisy | Vincent | Tulip Admiral of Admirals | 3 |
| Julia | Mina | Tulip Admiral van Eijck | 1 |
| | | | |
| Max | Isabel | Tulip Red Impression | 2 |

- Tulips on the Blockchain!
(†): Grower Transaction - New Tulips on the Market!

- What's Blockchain Lite?
(Source: [openblockchains/tulips](https://github.com/openblockchains/tulips))


- Add Blockchain Technology Made In Austria - Free! Gratis!
- Dutch Gulden
- Schilling! Schilling! on the Blockchain! Rock Solid

# Tulips on the Blockchain! Adding Transactions (Cont.)

**Quotes - Blockchains are the next Internets / Tulips**

> People who compare digital tokens to tulips are essentially saying digital tokens are a bubble backed
> by nothing but pure hype and speculation.
>
> What they fail to understand is that tulips come from dirt, not a blockchain.
>
> And as we all know, blockchain is possibly the best technological innovation since the internet.
> It will have a tremendous impact on global business and society in general.
> -- [TulipToken](http://tuliptoken.com)

# Bonus:

- Blockchain Articles
- Blockchain Books
- Awesome Blockchains
# Tulips on the Blockchain! Adding Transactions (Cont.)

```
let b0 = Block.first(
{ from: "Dutchgrown", to: "Vincent", what: "Tulip Bloemendaal Sunset", qty: 10 },
{ from: "Keukenhof", to: "Anne", what: "Tulip Semper Augustus", qty: 7 } )
let b1 = Block.next( b0,
{ from: "Flowers", to: "Ruben", what: "Tulip Admiral van Eijck", qty: 5 },
{ from: "Vicent", to: "Anne", what: "Tulip Bloemendaal Sunset", qty: 3 },
{ from: "Anne", to: "Julia", what: "Tulip Semper Augustus", qty: 1 },
{ from: "Julia", to: "Luuk", what: "Tulip Semper Augustus", qty: 1 } )
let b2 = Block.next( b1,
{ from: "Bloom & Blossom", to: "Daisy", what: "Tulip Admiral of Admirals", qty: 8 },
{ from: "Vincent", to: "Max", what: "Tulip Bloemendaal Sunset", qty: 2 },
{ from: "Anne", to: "Martijn", what: "Tulip Semper Augustus", qty: 2 },
{ from: "Ruben", to: "Julia", what: "Tulip Admiral van Eijck", qty: 2 } )
...
```



# Tulips on the Blockchain! Adding Transactions (Cont.)

resulting in:

```
[ Block {
index: 0,
timestamp: 1637-09-25 17:39:21,
data:
[ { from: 'Dutchgrown', to: 'Vincent', what: 'Tulip Bloemendaal Sunset', qty: 10 },
{ from: 'Keukenhof', to: 'Anne', what: 'Tulip Semper Augustus', qty: 7 } ],
previousHash: '0',
hash: '7cb2df9eee29ca77c99eb4591a25dcbdfa9609aff2bd3558d1a0fe22acd08a51' },
Block {
index: 1,
timestamp: 1637-09-25 17:49:21,
data:
[ { from: 'Flowers', to: 'Ruben', what: 'Tulip Admiral van Eijck', qty: 5 },
{ from: 'Vicent', to: 'Anne', what: 'Tulip Bloemendaal Sunset', qty: 3 },
{ from: 'Anne', to: 'Julia', what: 'Tulip Semper Augustus', qty: 1 },
{ from: 'Julia', to: 'Luuk', what: 'Tulip Semper Augustus', qty: 1 } ],
previousHash: '7cb2df9eee29ca77c99eb4591a25dcbdfa9609aff2bd3558d1a0fe22acd08a51',
hash: 'a7464e98290039f467e7abf6699180205f5151e76b57a79b39f43acc39d75660' },
Block {
index: 2,
timestamp: 1637-09-25 17:59:21,
data:
[ { from: 'Bloom & Blossom', to: 'Daisy', what: 'Tulip Admiral of Admirals', qty: 8 },
{ from: 'Vincent', to: 'Max', what: 'Tulip Bloemendaal Sunset', qty: 2 },
{ from: 'Anne', to: 'Martijn', what: 'Tulip Semper Augustus', qty: 2 },
{ from: 'Ruben', to: 'Julia', what: 'Tulip Admiral van Eijck', qty: 2 } ],
previousHash: 'a7464e98290039f467e7abf6699180205f5151e76b57a79b39f43acc39d75660',
hash: 'b7e4952f801651c1e14d61d77b869d18268b46c468923089f1da33e3959b56b9' },
...
]
```


# What's Blockchain Lite - JavaScript Edition?

blockchain-lite library / module (npm: [`blockchain-lite`](https://www.npmjs.com/package/blockchain-lite)) -
build your own blockchain with crypto hashes -
revolutionize the world with blockchains, blockchains, blockchains one block at a time

**Usage**

Let's get started. Build your own blockchain one block at a time.
Example:

``` js
const Blocks = require( "blockchain-lite" )

// use basic block
let Block = Blocks.basic

let b0 = Block.first( 'Genesis' )
let b1 = Block.next( b0, 'Transaction Data...' )
let b2 = Block.next( b1, 'Transaction Data......' )
let b3 = Block.next( b2, 'More Transaction Data...' )

let blockchain = [b0, b1, b2, b3]

console.log( blockchain )
```



# Case Study - Dutch Gulden on the Blockchain!

![](i/guldenmarket.png)

(Source: [coinmarketcap.com/currencies/gulden](https://coinmarketcap.com/currencies/gulden))


# Schilling! Schilling! on the Blockchain! Rock-Solid Alpine Dollar from Austria

Who's in? Invest Now!

Learn more @ [openblockchains/schilling](https://github.com/openblockchains/schilling)



# Bonus: Blockchain Articles

[**Reflections on the Blockchain**](http://rufuspollock.com/2016/07/02/reflections-on-the-blockchain) by Rufus Pollock (Open Knowledge Foundation), July 2016 --
_The DAO: Code is not Law – and It’s Dangerous to Think So ++
The Internet changed the world - surely the Blockchain will too? ++
Gold-rush or Internet-rush? ++
Governance Matters in Bitcoin ++
The Myth of a Costless, Ownerless Network ++
Lessons from History_

[**On the Dangers of a Blockchain Monoculture**](https://tonyarcieri.com/on-the-dangers-of-a-blockchain-monoculture) by Tony Arcieri, January 2016 --
_The Bitcoin blockchain: the world's worst database ++
Next-generation protocols ++
Decentralized ledger protocols ++
Bitcoin-NG ++
Blockchain! Blockchain! Blockchain! ++
The great decentralized database in the sky_


[**I Don’t Believe in Blockchain**](https://www.tbray.org/ongoing/When/201x/2017/05/13/Not-Believing-in-Blockchain) by Tim Bray, May 2017


[**Minimum Viable Blockchain**](https://www.igvita.com/2014/05/05/minimum-viable-block-chain/) by Ilya Grigorik, May 2014 --
_Securing transactions with triple-entry bookkeeping ++
Securing transactions with PKI ++
Balance = Σ(receipts) ++
Multi-party transfers & verification ++
Double-spending and distributed consensus -
Requirements for a distributed consensus network;
Protecting the network from Sybil attacks;
Proof-of-work as a participation requirement ++
Building the minimum viable blockchain -
Adding "blocks" & transaction fee incentives;
Racing to claim the transaction fees;
Resolving chain conflicts;
Blocks are never final ++
Properties of the (minimum viable) blockchain_

[**Blockchains by analogies and applications: How blockchain compares to Git, Raft, and other technologies.**](https://www.oreilly.com/ideas/blockchains-by-analogies-and-applications)
by Kieren James-Lubin, January 2016 --
_Blockchains are databases ++
Understanding transactions ++
Persistent, replicated databases (related technology: Git) ++
Peer-to-peer networks (related technology: BitTorrent) ++
Distributed consensus (related technology: distributed databases, Raft) ++
Minting new coins (mining) ++
Embedded identities (related technology: TLS) ++
Smart contracts: Like SQL expressions & triggers ++
What can we really do with blockchains?_



# Bonus: Blockchain Books

[**Attack of the 50 Foot Blockchain: Bitcoin, Blockchain, Ethereum & Smart Contracts**](https://davidgerard.co.uk/blockchain/table-of-contents/) by David Gerard, London, 2017 --
_What is a bitcoin? ++
The Bitcoin ideology ++
The incredible promises of Bitcoin! ++
Early Bitcoin: the rise to the first bubble ++
How Bitcoin mining centralised ++
Who is Satoshi Nakamoto? ++
Spending bitcoins in 2017 ++
Trading bitcoins in 2017: the second crypto bubble ++
Altcoins ++
Smart contracts, stupid humans ++
Business bafflegab, but on the Blockchain ++
Case study: Why you can’t put the music industry on a blockchain_

[**Mastering Bitcoin - Programming the Open Blockchain**](https://github.com/bitcoinbook/bitcoinbook/blob/second_edition/ch09.asciidoc) 2nd Edition,
by Andreas M. Antonopoulos, 2017 - FREE (Online Source Version) --
_What Is Bitcoin? ++
How Bitcoin Works ++
Bitcoin Core: The Reference Implementation ++
Keys, Addresses ++
Wallets ++
Transactions ++
Advanced Transactions and Scripting ++
The Bitcoin Network ++
The Blockchain ++
Mining and Consensus ++
Bitcoin Security ++
Blockchain Applications_

[**Blockchain for Dummies, IBM Limited Edition**](https://www.ibm.com/blockchain/what-is-blockchain.html) by Manav Gupta, 2017 - FREE (Digital Download w/ Email) --
_Grasping Blockchain Fundamentals ++
Taking a Look at How Blockchain Works ++
Propelling Business with Blockchains ++
Blockchain in Action: Use Cases ++
Hyperledger, a Linux Foundation Project ++
Ten Steps to Your First Blockchain application_



# Bonus: Awesome Blockchains

A collection about awesome blockchains - open distributed public databases w/ crypto hashes incl. git ;-). Blockchains are the new tulips. Distributed is the new centralized.

More @ [openblockchains/awesome-blockchains](https://github.com/openblockchains/awesome-blockchains)


# Bonus: Git, Git, Git - The Stupid Content Tracker with Crypto Hashes

_Everything is local. Distributed is the new centralized._

> Yep, that's the joke. Nobody has been able to explain to me how the "blockchain" buzzword is significantly different to "git repo".
> -- [Yaakov](https://twitter.com/yaakov_h/status/902659507255312384)
>
> But if you said "let's build a currency where all transactions are stored in a git repo"
> you wouldn't be taken seriously for even 24 hrs.
> -- [Yaakov](https://twitter.com/yaakov_h/status/902659847224664064)
> Soon explaining git like "a git repo is like a blockchain with commits instead of blocks".
> -- [Nicolás Berger](https://twitter.com/nicoberger/status/901776907418697729)
>
> "A local branch is like a state channel. It can be pushed and merged into the master blockchain at any moment."
> -- [Nicolás Berger](https://twitter.com/nicoberger/status/901777571456614400)
> The #Blockchain has changed the world. Here I make the argument that the #Blockchain is just like #git.
> -- [Jackson Kelley](https://twitter.com/sjkelleyjr/status/901464041163341824)

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