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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Inside (Hyper) Ledger Lite - Add Transactions One Block at a Time and Balance the Accounts (Books)</title>
<style>
html, body { margin: 0; padding: 0; }
body { font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; }
a:link, a:visited { color: black; }
h1 { font-size: 30pt; }
h2 { font-size: 28pt; }
h3 { font-size: 25pt; }
p, li, dt, dd, td, th { font-size: 18pt; }
pre { font-size: 14pt; }
pre.small { font-size: 11pt; }
pre.code {
background-color: azure;
padding: 5px;
}
ul { list-style-type: square; }
.center { text-align: center; }
.slide { page-break-after: always;
min-height: 100mm;
padding: 40px;
border: 1px dotted black;
/*
background: -moz-linear-gradient( top, maroon, red);
*/
}
/*
for princexml (CSS3 paged media support)
@page { size: A4 landscape }
*/
</style>
</head>
<body>
<article id="presentation">
<section class="slide " id="1">
<!-- _S9SLIDE_ -->
<h1 id="blockchain-blockchain-blockchain-decentralize-payments-decentralize-transactions-decentralize-blockchains">Blockchain! Blockchain! Blockchain! Decentralize Payments. Decentralize Transactions. Decentralize Blockchains.</h1>
<p>What’s Blockchain?</p>
<ul>
<li>Distributed Database?</li>
<li>Hyper Ledger Book?</li>
<li>Consensus with Proof-of-Work or Proof-of-Stake?</li>
<li>Digital Fingerprints? Cryptographic Hashes?</li>
<li>Lottery? Central Bank?</li>
<li>Byzantine-Generals Solution?</li>
</ul>
<p>Yes. Yes. Yes. Blockchain! Blockchain! Blockchain!</p>
<p>(Source: <a href="https://github.com/openblockchains/whatsblockchain">openblockchains/whatsblockchain</a>)</p>
</section>
<section class="slide " id="2">
<!-- _S9SLIDE_ -->
<h1 id="inside-blockchains---inside-hyper-ledgers">Inside Blockchains - Inside (Hyper) Ledgers</h1>
<p>Q: What’s the best way to understand and learn about blockchains
and (hyper) ledgers?</p>
<p>A: Do it yourself (DIY)! Build your own blockchains and (hyper) ledgers
from scratch (zero)!</p>
</section>
<section class="slide " id="3">
<!-- _S9SLIDE_ -->
<h1 id="lets-build-your-own-hyper-ledger-from-zero--scratch">Let’s Build Your Own (Hyper) Ledger (From Zero / Scratch)</h1>
<p>Crypto God? Python Cowboy? Ruby Ninja? JavaScript Rockstar?</p>
<p>Yes, you can.</p>
<p><img src="i/fake-dilbert-blockchain.png" alt="" /></p>
</section>
<section class="slide " id="4">
<!-- _S9SLIDE_ -->
<h1 id="awesome-blockchains">Awesome Blockchains</h1>
<p>What’s Awesome Blockchains?</p>
<p>A public page that collects articles on building your own
blockchains and (hyper) ledgers from scratch (zero) -
github: <a href="https://github.com/openblockchains/awesome-blockchains">openblockchains/awesome-blockchains</a>.</p>
</section>
<section class="slide " id="5">
<!-- _S9SLIDE_ -->
<h1 id="whats-hyper-ledger-lite">What’s (Hyper) Ledger Lite?</h1>
<p>ledger-lite library (github: <a href="https://github.com/openblockchains/ledger.lite.rb">openblockchains/ledger.lite.rb</a>) - (free, open source) hyper ledger book for the distributed blockchain internet era;
add your transactions one block at a time; transfer crypto currencies or collectibles
and balance the accounts.</p>
</section>
<section class="slide " id="6">
<!-- _S9SLIDE_ -->
<h1 id="blockchain-vs-hyper-ledger-book---whats-the-difference">Blockchain vs (Hyper) Ledger (Book) - What’s the Difference?</h1>
<p>Q: What’s the Difference?</p>
</section>
<section class="slide " id="7">
<!-- _S9SLIDE_ -->
<h1 id="blockchain-vs-hyper-ledger-book---whats-the-difference-1">Blockchain vs (Hyper) Ledger (Book) - What’s the Difference?</h1>
<p>Blockchain - a list (chain) of blocks of transactions.</p>
<p>Blockchain Lite Example:</p>
<pre><code class="language-ruby">b0 = Block.first(
{ from: "Dutchgrown", to: "Vincent", what: "Tulip Bloemendaal Sunset", qty: 10 },
{ from: "Keukenhof", to: "Anne", what: "Tulip Semper Augustus", qty: 7 } )
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 } )
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 } )
...
</code></pre>
</section>
<section class="slide " id="8">
<!-- _S9SLIDE_ -->
<h1 id="blockchain-vs-hyper-ledger-book---whats-the-difference-2">Blockchain vs (Hyper) Ledger (Book) - What’s the Difference?</h1>
<p>Ledger Book = Accounting Book = Book of Accounts</p>
<p>What’s an Account?</p>
<p>Q: An account records …. ?</p>
<p>A: Transactions, transaction, transactions.</p>
<p><img src="i/ledger.jpg" alt="" /></p>
</section>
<section class="slide " id="9">
<!-- _S9SLIDE_ -->
<h1 id="blockchain-vs-hyper-ledger-book---whats-the-difference-3">Blockchain vs (Hyper) Ledger (Book) - What’s the Difference?</h1>
<p>Ledger Lite Example:</p>
<pre><code class="language-ruby">ledger = Ledger.new
ledger.write( Tx.new( from: "Keukenhof†", to: "Vincent", qty: 11, name: "Tulip Admiral van Eijck" ))
ledger.write( Tx.new( from: "Vincent", to: "Anne", qty: 3, name: "Tulip Admiral van Eijck" ))
ledger.write( Tx.new( from: "Anne", to: "Julia", qty: 2, name: "Tulip Admiral van Eijck" ))
ledger.write( Tx.new( from: "Julia", to: "Luuk", qty: 1, name: "Tulip Admiral van Eijck" ))
ledger.write(
Tx.new( from: "Dutchgrown†", to: "Ruben", qty: 11, name: "Tulip Semper Augustus" ),
Tx.new( from: "Vincent", to: "Max", qty: 3, name: "Tulip Admiral van Eijck" ),
Tx.new( from: "Ruben", to: "Julia", qty: 2, name: "Tulip Semper Augustus" ),
Tx.new( from: "Anne", to: "Martijn", qty: 1, name: "Tulip Admiral van Eijck" ))
...
</code></pre>
</section>
<section class="slide " id="10">
<!-- _S9SLIDE_ -->
<h1 id="blockchain-vs-hyper-ledger-book---whats-the-difference-4">Blockchain vs (Hyper) Ledger (Book) - What’s the Difference?</h1>
<p>Ledger Lite Example:</p>
<pre><code class="language-ruby">ledger = Ledger.new
ledger.write(
Block.new( Tx.new( from: "Keukenhof†", to: "Vincent", qty: 11, name: "Tulip Admiral van Eijck" ),
Tx.new( from: "Vincent", to: "Anne", qty: 3, name: "Tulip Admiral van Eijck" ),
Tx.new( from: "Anne", to: "Julia", qty: 2, name: "Tulip Admiral van Eijck" ),
Tx.new( from: "Julia", to: "Luuk", qty: 1, name: "Tulip Admiral van Eijck" )),
Block.new( Tx.new( from: "Dutchgrown†", to: "Ruben", qty: 11, name: "Tulip Semper Augustus" ),
Tx.new( from: "Vincent", to: "Max", qty: 3, name: "Tulip Admiral van Eijck" ),
Tx.new( from: "Ruben", to: "Julia", qty: 2, name: "Tulip Semper Augustus" ),
Tx.new( from: "Anne", to: "Martijn", qty: 1, name: "Tulip Admiral van Eijck" )))
...
</code></pre>
</section>
<section class="slide " id="11">
<!-- _S9SLIDE_ -->
<h1 id="blockchain-vs-hyper-ledger-book---whats-the-difference-5">Blockchain vs (Hyper) Ledger (Book) - What’s the Difference?</h1>
<p>Q: What’s the Difference?</p>
</section>
<section class="slide " id="12">
<!-- _S9SLIDE_ -->
<h1 id="blockchain-vs-hyper-ledger-book---whats-the-difference-6">Blockchain vs (Hyper) Ledger (Book) - What’s the Difference?</h1>
<p>Blockchain:</p>
<ul>
<li>bundles transactions into blocks</li>
<li>transactions get added to the chain on block at a time</li>
</ul>
<p>=> Is the transaction valid and the “consensus” / accepted “time-stamped” truth to be trusted?</p>
<p>Ledger:</p>
<ul>
<li>add one transaction at a time</li>
<li>balances your accounts!</li>
<li>double entry bookkeeping (or triple entry bookkeeping!)</li>
</ul>
<p>=> Who owns what?</p>
</section>
<section class="slide " id="13">
<!-- _S9SLIDE_ -->
<h1 id="double-entry-bookkeeping-accounting">Double Entry Bookkeeping (Accounting)</h1>
<blockquote>
<p>Double-entry bookkeeping, in accounting,
is a system of bookkeeping so named because every entry to an account
requires a corresponding and opposite entry to a different account.
The double entry has two equal and corresponding sides known as debit and credit.
The left-hand side is debit and right-hand side is credit.</p>
<p>– <a href="https://en.wikipedia.org/wiki/Double-entry_bookkeeping_system">Wikipedia</a></p>
</blockquote>
<pre><code class="language-ruby">## apply/do single transaction - send payment - do transfer
def send( from, to, amount )
if sufficient?( from, amount )
@addr[ from ] -= amount
@addr[ to ] += amount
end
end # method send
## note: transfer is an alias for send (payment)
alias :transfer :send
</code></pre>
</section>
<section class="slide " id="14">
<!-- _S9SLIDE_ -->
<h1 id="ledger-vs-hyper-ledger---whats-the-difference">Ledger vs Hyper Ledger - What’s the difference?</h1>
<p>Hyper - Ledger (book) for the distributed blockchain internet era</p>
<p>Coinbase! Create money out of … nothing one block at a time!</p>
<pre><code class="language-ruby">Ledger.configure do |config|
config.coinbase = ['Keukenhof†']
end
# ...
def send( from, to, amount )
if sufficient?( from, amount )
if Ledger.config.coinbase?( from )
# note: coinbase has unlimited funds!! ("virtual" built-in money printing address)
else
@addr[ from ] -= amount
end
@addr[ to ] += amount
end
end # method send
</code></pre>
</section>
<section class="slide " id="15">
<!-- _S9SLIDE_ -->
<h1 id="inside-ledger-lite---currencies-commodities-collectibles-assets-and-more">Inside Ledger Lite - Currencies, Commodities, Collectibles, Assets and More</h1>
<p>Ledger Lite lets you design / create your own transactions.</p>
<p>For example, let’s use
<code>from</code>, <code>to</code>, <code>qty</code> (quantity) and <code>name</code> (of commodity, collectible or asset).
Override the <code>Ledger#unpack</code> method for “unpacking” arguments from transactions
and the <code>Ledger#send</code> method for “committing” transactions:</p>
<pre><code class="language-ruby">def unpack( tx )
## "unpack" from, to, qty, name values
if tx.is_a?( Hash ) ## support hashes
from = tx[:from]
to = tx[:to]
qty = tx[:qty]
name = tx[:name]
else ## assume it's a transaction (tx) struct/class
from = tx.from
to = tx.to
qty = tx.qty
name = tx.name
end
[from,to,qty,name]
end
</code></pre>
</section>
<section class="slide " id="16">
<!-- _S9SLIDE_ -->
<h1 id="inside-ledger-lite---currencies-commodities-collectibles-assets-and-more-cont">Inside Ledger Lite - Currencies, Commodities, Collectibles, Assets and More (Cont.)</h1>
<pre><code class="language-ruby">def send( from, to, qty, name )
if sufficient?( from, qty, name )
if Ledger.config.coinbase?( from )
# note: coinbase has unlimited supply!! magic happens here
else
@addr[ from ][ name ] -= qty
end
@addr[ to ][ name ] += qty
end
end
</code></pre>
</section>
<section class="slide " id="17">
<!-- _S9SLIDE_ -->
<h1 id="inside-ledger-lite---currencies-commodities-collectibles-assets-and-more-cont-1">Inside Ledger Lite - Currencies, Commodities, Collectibles, Assets and More (Cont.)</h1>
<p>Now use the ledger with the new transaction format like:</p>
<pre><code class="language-ruby">ledger = Ledger.new
ledger.send( "Keukenhof†", "Vincent", 11, "Tulip Admiral van Eijck" )
ledger.send( "Vincent", "Anne", 3, "Tulip Admiral van Eijck" )
ledger.send( "Anne", "Julia", 2, "Tulip Admiral van Eijck" )
ledger.send( "Julia", "Luuk", 1, "Tulip Admiral van Eijck" )
ledger.send( "Dutchgrown†", "Ruben", 11, "Tulip Semper Augustus" )
ledger.send( "Vincent", "Max", 3, "Tulip Admiral van Eijck" )
ledger.send( "Ruben", "Julia", 2, "Tulip Semper Augustus" )
ledger.send( "Anne", "Martijn", 1, "Tulip Admiral van Eijck"
</code></pre>
</section>
<section class="slide " id="18">
<!-- _S9SLIDE_ -->
<h1 id="do-it-yourself-diy---build-your-own-real-world-case-studies">Do-it-yourself (DIY) - Build Your Own Real-World Case Studies</h1>
<p>Open source, free case studies using blockchain-lite, merkletree, p2p,
and ledger-lite include:</p>
<ul>
<li>Central Bank - github: <a href="https://github.com/openblockchains/centralbank">openblockchains/centralbank</a></li>
<li>Tulipmania - github: <a href="https://github.com/openblockchains/tulipmania">openblockchains/tulipmania</a></li>
</ul>
<p>And last but not least:</p>
<ul>
<li>Shilling (or Schilling) also known as Bitshilling - github: <a href="https://github.com/bitshilling">bitshilling</a></li>
</ul>
</section>
<section class="slide " id="19">
<!-- _S9SLIDE_ -->
<h1 id="do-it-yourself-diy---build-your-own-real-world-case-studies---central-bank">Do-it-yourself (DIY) - Build Your Own Real-World Case Studies - Central Bank</h1>
<p>Central Bank - centralbank command line tool (and core library) -
print your own money / cryptocurrency;
run your own federated central bank nodes on the blockchain peer-to-peer over HTTP;
revolutionize the world one block at a time</p>
<p>Command Line. Use the <code>centralbank</code> command line tool. Try:</p>
<pre><code>$ centralbank -h
</code></pre>
<p>resulting in:</p>
<pre><code>Usage: centralbank [options]
Wallet options:
-n, --name=NAME Address name (default: Alice)
Server (node) options:
-o, --host HOST listen on HOST (default: 0.0.0.0)
-p, --port PORT use PORT (default: 4567)
-h, --help Prints this help
</code></pre>
</section>
<section class="slide " id="20">
<!-- _S9SLIDE_ -->
<h1 id="do-it-yourself-diy---build-your-own-real-world-case-studies---central-bank-cont">Do-it-yourself (DIY) - Build Your Own Real-World Case Studies - Central Bank (Cont.)</h1>
<p>To start a new (network) node using the default wallet
address (that is, Alice) and the default server host and port settings
use:</p>
<pre><code>$ centralbank
</code></pre>
<p>Stand back ten feets :-) while starting up the machinery.
Ready to print (mine) money on the blockchain?
In your browser open up the page e.g. <code>http://localhost:4567</code>. Voila!</p>
<p><img src="i/centralbank.png" alt="" /></p>
</section>
<section class="slide " id="21">
<!-- _S9SLIDE_ -->
<h1 id="do-it-yourself-diy---build-your-own-real-world-case-studies---shilling-or-schilling">Do-it-yourself (DIY) - Build Your Own Real-World Case Studies - Shilling (or Schilling)</h1>
<p>Shilling (or Schilling) on the Blockchain! -
Rock-Solid Alpine Dollar from Austria -
BTS is the new ATS - Bitcoin Sidechain</p>
<p>Find out more @ github: <a href="https://github.com/bitshilling">bitshilling</a>.</p>
</section>
</article> <!-- presentation -->
</body>
</html>