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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>GrinSwap @ Binance Labs Meetup, Berlin May 9 2019</title>
<link rel="stylesheet" href="css/reset.css" />
<link rel="stylesheet" href="css/reveal.css" />
<link rel="stylesheet" href="css/theme/white2.css" />
<!-- Theme used for syntax highlighting of code -->
<link rel="stylesheet" href="lib/css/monokai.css" />
<!-- Printing and PDF exports -->
<script>
var link = document.createElement("link");
link.rel = "stylesheet";
link.type = "text/css";
link.href = window.location.search.match(/print-pdf/gi)
? "css/print/pdf.css"
: "css/print/paper.css";
document.getElementsByTagName("head")[0].appendChild(link);
</script>
</head>
<body>
<div class="reveal">
<div class="slides">
<section>
<img data-src="img/grinswap_vectorized.svg" />
<p>
<span
style="background-color: black; color: white; padding-left:0.5em; padding-right:0.5em;"
>vault713</span
>
@lehnberg
</p>
<p>Binance Labs // FullNode // Berlin // 20190509</p>
</section>
<section data-markdown>
<script type="text/template">
## Today
* Context
* Atomic Swaps
* GrinSwap
* Summary & Questions
</script>
</section>
<section data-markdown>
<script type="text/template">
# Mimblewimble
</script>
</section>
<section data-markdown>
<script type="text/template">
## Mimblewimble
* Blockchain design proposed by Jedusor (2016), improved by Poelstra (2016).
* Relies on Confidential Transactions (Maxwell 2016), CoinJoin (Maxwell 2013), and OWAS (Mouton 2013)
* Scalable: Only UTXO set, block headers and kernels required for full sync.
* Fungible: No amounts, no scripts, no addresses, no non-confidentiality, in a simple protocol.
* Requires interaction to build transactions.
</script>
</section>
<section data-markdown>
<script type="text/template">
# Grin
</script>
</section>
<section data-markdown>
<script type="text/template">
## Grin
* First MW implementation: announced October 2016, launched Jan 2019.
* Written in Rust by an open source community funded by voluntary donations.
* Proof of Work mined: Friendly to ASICs in the long run, resistant in the short run.
* Constant emission rate of 1 Grin/second for ever.
* Open, Fair, Honest, Minimal, Rational, Transparent.
</script>
</section>
<section data-markdown>
<script type="text/template">
## Grin tech
* Schnorr signatures: Smaller, multi-sig, scriptless scripts, certifiable transactions
* Bulletproofs: Smaller ZK range proof for CT
* Dandelion: Privacy-preserving transaction propagation and aggregation
* Scriptless scripts: Enables atomic swaps in Grin and some other scripting behavior.
</script>
</section>
<section data-markdown>
<script type="text/template">
# vault713
</script>
</section>
<section data-markdown>
<script type="text/template">
## vault713
* Building infrastructure to enable a privacy preserving financial system.
* [grinbox://](https://grinbox.io) - an open transaction building protocol.
* [wallet713](https://wallet.713.mw/) - the Swiss army knife for Grin.
* cashier713 - Grin payment processing for pools and exchanges.
* freezer713 - Grin cold storage with t-of-n multi-sig.
* Boot-strapped in pre-seed stage.
</script>
</section>
<section data-markdown>
<script type="text/template">
# Atomic Swaps
</script>
</section>
<section data-markdown>
<section id="fragments">
<script type="text/template">
```
Alice 👱♀️ {
has: 🍏;
wants: 🍊;
}
```
<div class="fragment">
```
Bob 👨🦱 {
has: 🍊;
wants: 🍏;
}
```
</div>
<div class="fragment">How can they trade?</div>
<div class="fragment">
```
Tom 👨⚖️ {
trusted_by: 👱♀️, 👨🦱;
}
```
</div>
</script>
</section>
</section>
<section data-markdown>
<script type="text/template">
### Traditional exchange
```
// 1. Alice & Bob send to Tom
deposit: {
👱♀️ → 🍏 → 👨⚖️;
👨🦱 → 🍊 → 👨⚖️;
}
// 2. Tom sends to Alice & Bob
withdrawal: {
👨⚖️ → 🍊 → 👱♀️;
👨⚖️ → 🍏 → 👨🦱;
}
```
</script>
</section>
<section data-markdown>
<script type="text/template">
### Atomic Swaps remove Tom
```
swap: {
👱♀️ → 🍏 → 👨🦱;
👨🦱 → 🍊 → 👱♀️;
}
```
1. Either both operations happen; or neither.
1. Cheating does not allow funds to be stolen.
</script>
</section>
<section data-markdown>
<script type="text/template">
</script>
</section>
<section data-markdown>
<script type="text/template">
### Pros:
* No need for 3rd party Tom
* No need for trust between Alice & Bob
* Retain custody of assets
</script>
</section>
<section data-markdown>
<script type="text/template">
### Cons:
* Speed
* Friction
* Efficiency
* Vulnerable to surveillance (if same hash is used across chains)
</script>
</section>
<section data-markdown>
<script type="text/template">
# GrinSwap
</script>
</section>
<section data-markdown>
<script type="text/template">
## GrinSwap
* Uses Scripless Scripts / Adaptor Signatures (Poelstra 2017)
* vault713 project led by @jaspervdm, creator of first ETH <-> Grin and BTC <-> Grin atomic swaps.
* Open source project supported by Binance Labs fellowships.
</script>
</section>
<!-- <section data-background="img/bg_grin_swap.svg">
</section> -->
<section data-markdown>
<script type="text/template">
```
Alice 👱♀️ {
has: BTC;
wants: GRIN;
}
Bob 👨🦱 {
has: GRIN;
wants: BTC;
}
```
</script>
</section>
<section data-markdown>
<script type="text/template">
</script>
</section>
<section data-markdown>
<script type="text/template">
## Improves privacy
* Looks like any other Grin transaction
* The tx on the other chain looks like a 2-of-2 MuSig with a timeout
* Harder to link the two together
</script>
</section>
<section data-markdown>
<script type="text/template">
## Use cases
* Under the radar OTC trading with no Escrow
* Privacy-preserving way to trade in and out of Grin
* Breaks traceability for other chain assets
</script>
</section>
<section>
<h2>Roadmap</h2>
<table>
<thead>
<tr>
<th>Month</th>
<th>Deliverable</th>
</tr>
</thead>
<tbody>
<tr>
<td>May</td>
<td>Rust library foundation</td>
</tr>
<tr>
<td>June</td>
<td>ETH / ERC-20 specific requirements</td>
</tr>
<tr>
<td>July</td>
<td>wallet713 integration</td>
</tr>
<tr>
<td>?</td>
<td>BTC support</td>
</tr>
</tbody>
</table>
</section>
<section data-markdown>
<script type="text/template">
## Challenges
* Lock times
* Free option problem
* Usability
</script>
</section>
<section data-markdown>
<script type="text/template">
## Contributing
* Github: [/vault713/grinswap](https://github.com/vault713/grinswap)
* Gitter: [/vault713/grinswap](https://gitter.im/vault713/grinswap)
* Keybase: [@jaspervdm](https://keybase.io/jaspervdm) / [@lehnberg](https://keybase.io/lehnberg)
</script>
</section>
<section data-markdown>
<script type="text/template">
# Summary
</script>
</section>
<section data-markdown>
<script type="text/template">
## Summary
* Atomic swaps enables asset trading without a 3rd party or risking your assets.
* It's best suited for specific users and needs.
* GrinSwap significantly improves privacy for swaps.
* We've just started work, come join us!
</script>
</section>
<section data-markdown>
<script type="text/template">
# Thank you
[[email protected]](mailto:[email protected])
keybase/gitter/github/twitter: @lehnberg
</script>
</section>
</div>
</div>
<script src="js/reveal.js"></script>
<script>
// More info about config & dependencies:
// - https://github.com/hakimel/reveal.js#configuration
// - https://github.com/hakimel/reveal.js#dependencies
Reveal.initialize({
dependencies: [
{ src: "plugin/markdown/marked.js" },
{ src: "plugin/markdown/markdown.js" },
{ src: "plugin/notes/notes.js", async: true },
{ src: "plugin/highlight/highlight.js", async: true }
],
controls: true,
hash: true,
center: true,
transition: "none", // none/fade/slide/convex/concave/zoom
transitionSpeed: "default" // default/fast/slow
});
</script>
</body>
</html>