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wallets_hardfork.html
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<!doctype html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
<title>Wallets</title>
<link rel="stylesheet" href="css/reveal.css">
<link rel="stylesheet" href="css/theme/simple.css">
<!-- Theme used for syntax highlighting of code -->
<link rel="stylesheet" href="lib/css/xcode.css">
<!-- Theme override for teachbitcoin -->
<link rel="stylesheet" href="css/teachbitcoin.css">
<!-- Google Font Roboto -->
<link href="https://fonts.googleapis.com/css?family=Open+Sans:300,400,400i,600" rel="stylesheet">
<link href="https://fonts.googleapis.com/css?family=Roboto+Mono" rel="stylesheet">
</head>
<body>
<div class="reveal">
<div class="slides">
<!-- *********** BEGIN: Chain Forks *********** -->
<section class = "box">
<div class = "title">
<span class = "title weight">Chain Fork & TX Replays</span>
</div>
<!-- 45% div for formula and curve--><!-- 45% text & bulletpoint -->
<div class = "multi_text_box_container" style = "padding: 40px 0 0 0; width: 1270px;">
<!-- 60% div for formula and curve-->
<div class = "" style = "width: 58%; font-size: 22px;">
<img src="images/beijing_meetup_july2018/chain_fork0.svg" class = "image" style = "z-index: -3;">
<img src="images/beijing_meetup_july2018/chain_fork1.svg" class = "fragment image" style = "z-index: -3;">
<!-- <img src="images/beijing_meetup_july2018/hd_introduction1.svg" class = "fragment image" style = "z-index: -3;">
<img src="images/beijing_meetup_july2018/hd_introduction2.svg" class = "fragment image" style = "z-index: -3;"> -->
<!-- <img src="images/wallets/hd_child_keys_step_1.svg" class = "fragment image" style = "z-index: -2;">
<img src="images/wallets/hd_child_keys_step_2.svg" class = "fragment image" style = "z-index: -1;"> -->
</div>
<!-- 45% text & bulletpoint -->
<div class = "text_box"
style = "width: 45%; font-size: 24px; margin: 0px 0 0 0">
<ul style = "margin: 0; padding: 0px; list-style-type: none;">
<!-- <hr style = "height:5px; visibility:hidden;"> -->
<li style = "font-weight: bold;">At fork height: Same UXTO set</li>
<ul style = "list-style-type: circle;">
<li>Wallet keys valid can sign on both chains</li>
</ul>
<hr style = "height:5px; visibility:hidden;">
<li style = "font-weight: bold;">Transaction replay across chains</li>
<ul style = "list-style-type: circle;">
<li>Signatures can be valid on both chains</li>
</ul>
<hr style = "height:5px; visibility:hidden;">
<li style = "font-weight: bold;">Hard forked chains have replay projection</li>
<ul style = "list-style-type: circle;">
<li>Requires modification of transaction signature algorithm</li>
</ul>
<hr style = "height:5px; visibility:hidden;">
<li style = "font-weight: bold;">Support new chain parameters required...</li>
<hr style = "height:5px; visibility:hidden;">
</ul>
</div>
</div><!-- End of 2 column container -->
</section>
<!-- *********** END: Chain Forks *********** -->
<!-- *********** TODO: Fork vs. Signature Mod Matrix *********** -->
<!-- *********** Begin: Modified Sighash *********** -->
<section class = "box">
<div class = "title">
Replay Protection: <span class = "title weight">Modified Sighash</span>
</div>
<!-- 45% div for formula and curve--><!-- 45% text & bulletpoint -->
<div class = "multi_text_box_container" style = "padding: 40px 0 0 0; width: 1270px;">
<!-- 60% div for formula and curve-->
<div class = "" style = "width: 58%; font-size: 22px;">
<img src="images/beijing_meetup_july2018/alt_sighash0.svg" class = "image" style = "z-index: -3;">
<img src="images/beijing_meetup_july2018/alt_sighash1.svg" class = "fragment image" style = "z-index: -3;">
<img src="images/beijing_meetup_july2018/alt_sighash2.svg" class = "fragment image" style = "z-index: -3;">
</div>
<!-- 45% text & bulletpoint -->
<div class = "text_box"
style = "width: 45%; font-size: 24px; margin: 0px 0 0 0">
<ul style = "margin: 0; padding: 0px; list-style-type: none;">
<!-- <hr style = "height:5px; visibility:hidden;"> -->
<li style = "font-weight: bold;">Signature hash is signed by private key</li>
<hr style = "height:5px; visibility:hidden;">
<li style = "font-weight: bold;">Bcash modifies signature hash marker</li>
<ul style = "list-style-type: circle;">
<li>Sighash marker with forkID</li>
</ul>
<hr style = "height:5px; visibility:hidden;">
<li style = "font-weight: bold;">Libbitcoin API parameterises signing</li>
<ul style = "list-style-type: circle;">
<li>Sighash marker</li>
<li>Serialisation Algorithm (e.g. with BIP143)</li>
</ul>
<hr style = "height:5px; visibility:hidden;">
</ul>
</div>
</div><!-- End of 2 column container -->
</section>
<!-- *********** END: Modified Sighash *********** -->
<!-- *********** BEGIN: Multifork Wallet *********** -->
<section class = "box">
<div class = "title">
<span class = "title weight">Multi-Fork</span> Wallet
</div>
<!-- 45% div for formula and curve--><!-- 45% text & bulletpoint -->
<div class = "multi_text_box_container" style = "padding: 40px 0 0 0; width: 1270px;">
<!-- 60% div for formula and curve-->
<div class = "" style = "width: 58%; font-size: 22px;">
<img src="images/beijing_meetup_july2018/multi_fork_wallet0.svg" class = "image" style = "z-index: -3;">
<img src="images/beijing_meetup_july2018/multi_fork_wallet1.svg" class = "fragment image" style = "z-index: -3;">
</div>
<!-- 45% text & bulletpoint -->
<div class = "text_box"
style = "width: 45%; font-size: 24px; margin: 0px 0 0 0">
<ul style = "margin: 0; padding: 0px; list-style-type: none;">
<!-- <hr style = "height:5px; visibility:hidden;"> -->
<li style = "font-weight: bold;">Wallet reconstructs HD tree for forked chain</li>
<ul style = "list-style-type: circle;">
<li>HD structure regenerated after each fork</li>
<li>Wallet queries forked chain node for unspent UXTOs</li>
</ul>
<hr style = "height:5px; visibility:hidden;">
<li style = "font-weight: bold;">Libbitcoin Server w/ new chain parameters</li>
<ul style = "list-style-type: circle;">
<li>New server for each set of chain parameters</li>
<li>Wallet can independently broadcast TXs on each forked chain</li>
</ul>
<hr style = "height:5px; visibility:hidden;">
</ul>
</div>
</div><!-- End of 2 column container -->
</section>
<!-- *********** END: Multifork Wallet *********** -->
</div><!-- END: Slides Div -->
</div><!-- END: Reveal Div -->
<script src="lib/js/head.min.js"></script>
<script src="js/reveal.js"></script>
<script>
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