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<!DOCTYPE html><html lang="en"><head><meta charSet="utf-8"/><meta http-equiv="X-UA-Compatible" content="IE=edge"/><title>Sports Betting Example · bitcoin-s</title><meta name="viewport" content="width=device-width, initial-scale=1.0"/><meta name="generator" content="Docusaurus"/><meta name="description" content="## Requirements for example"/><meta name="docsearch:version" content="1.9.3"/><meta name="docsearch:language" content="en"/><meta property="og:title" content="Sports Betting Example · bitcoin-s"/><meta property="og:type" content="website"/><meta property="og:url" content="https://bitcoin-s.org/"/><meta property="og:description" content="## Requirements for example"/><meta property="og:image" content="https://bitcoin-s.org/img/undraw_online.svg"/><meta name="twitter:card" content="summary"/><meta name="twitter:image" content="https://bitcoin-s.org/img/undraw_tweetstorm.svg"/><link rel="shortcut icon" href="/img/favicon.ico"/><link rel="stylesheet" href="https://cdn.jsdelivr.net/docsearch.js/1/docsearch.min.css"/><link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.12.0/styles/default.min.css"/><script>
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<p>You need to have a fully built oracle server. You can follow <a href="/docs/oracle/build-oracle-server">this guide</a> to do this.</p>
<p>You will also need a the <code>bitcoin-s-cli</code> command line tool to interact with the server.
You can find how to build this <a href="/docs/applications/cli">here</a></p>
<p>After building the oracle server, you will need to start it with</p>
<pre><code class="hljs">.<span class="hljs-meta-keyword">/app/</span>oracle-server<span class="hljs-meta-keyword">/target/</span>universal<span class="hljs-meta-keyword">/stage/</span>bin/bitcoin-s-oracle-server
</code></pre>
<h2><a class="anchor" aria-hidden="true" id="rocky-vs-drago-2022-boxing-championship"></a><a href="#rocky-vs-drago-2022-boxing-championship" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Rocky V.S. Drago 2022 Boxing Championship</h2>
<p>In 2022, Rocky and Drago compete in the final round of the boxing championship.
People want to do a DLC based on the outcome, so you decide to be
their oracle and attest to the winner of the match.</p>
<ol>
<li>Setting up an oracle that can attest to the outcome of the match</li>
<li>Complete the announcement by attesting to the winner of the match</li>
</ol>
<h3><a class="anchor" aria-hidden="true" id="setting-up-the-boxing-bet"></a><a href="#setting-up-the-boxing-bet" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Setting up the boxing bet</h3>
<p>The boxing match bet can be represented by an enumerated announcement. What we mean by this is the outcomes for this announcement can be simply enumerated in a list. There were three possible outcomes for the match</p>
<ol>
<li>&quot;Drago_win&quot;</li>
<li>&quot;Rocky_win&quot;</li>
<li>&quot;other&quot;</li>
</ol>
<p>The next step is to create an oracle announcement that can be shared with others. This announcement
contains cryptographic information that is used by people that want to enter into DLCs to setup
their bitcoin transactions.</p>
<p>To do this, we need to use the <code>createenumannouncement</code> rpc. This RPC takes 3 parameters</p>
<ol>
<li>The label for the announcement
we will use <code>2022-championship-boxing</code></li>
<li>the maturation time for the announcement in ISO 8061 format
For our example we will use <code>&quot;2022-06-16T00:00:00Z&quot;</code></li>
<li>The outcomes, which we listed above &quot;Drago_win,Rocky_win,other&quot;</li>
</ol>
<p>with all of this information, we can create the announcement with <code>bitcoin-s-cli</code>!</p>
<p>./bitcoin-s-cli createenumannouncement 2022-championship-boxing &quot;2022-06-16T00:00:00Z&quot; &quot;Rocky_win,Drago_win,other&quot;
fdd824c358412e9c9dc12942a9e1ed030c7bf4ff10f80b0228f9674245ae15d8a956bae6fa0186994d7e12a3b0793b67ebad83d735e9232d9e15eda5c2948d4b8a042a5eb923f087791a31409523431b28dc20af6871f515715ab0e6219c971ee4cb75cbfdd8225f00010a9e74e8c52ae90846cedbb2af3d2e0edc2234a8b4ef240c4fcfbe4f31c693be62aa7280fdd8061c000309526f636b795f77696e09447261676f5f77696e056f7468657218323032322d6368616d70696f6e736869702d626f78696e67</p>
<p>Yay! The hex string returned is an oracle announcement.
You can submit this on a tool like the <a href="https://oracle.suredbits.com">Suredbits oracle explorer</a>
so others can find your oracle.</p>
<p>If you are building infrastructure to automatically sign announcements, it is important to store two things</p>
<ol>
<li>The oracle announcement above (<code>fdd824c...</code>)</li>
<li>The timestamp that the announcement matures at (<code>&quot;2022-06-16T00:00:00Z&quot;</code>)</li>
</ol>
<p>Now you can schedule jobs to sign the announcement when the maturation time passes.</p>
<h3><a class="anchor" aria-hidden="true" id="signing-the-outcome-for-the-boxing-bet"></a><a href="#signing-the-outcome-for-the-boxing-bet" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Signing the outcome for the boxing bet</h3>
<p>In the real world, you would want to wait for the maturation time to pass for your announcement.
For the purposes of the demo, we can skip this wait. The winner of the 2022 boxing championship is Rocky.</p>
<p>Let's sign the announcement.</p>
<pre><code class="hljs"> ./bitcoin-s-cli signenum <span class="hljs-number">2022</span>-championship-boxing Rocky_win
fdd<span class="hljs-number">8688518323032322</span>d<span class="hljs-number">6368616</span>d<span class="hljs-number">70696</span>f<span class="hljs-number">6e736869702</span>d<span class="hljs-number">626</span>f<span class="hljs-number">78696e67</span>b<span class="hljs-number">923</span>f<span class="hljs-number">087791</span>a<span class="hljs-number">31409523431</span>b<span class="hljs-number">28</span>dc<span class="hljs-number">20</span>af<span class="hljs-number">6871</span>f<span class="hljs-number">515715</span>ab<span class="hljs-number">0e6219</span><span class="hljs-keyword">c</span><span class="hljs-number">971</span>ee<span class="hljs-number">4</span>cb<span class="hljs-number">75</span>cb<span class="hljs-number">00010</span>a<span class="hljs-number">9e74</span>e<span class="hljs-number">8</span><span class="hljs-keyword">c</span><span class="hljs-number">52</span>ae<span class="hljs-number">90846</span>cedbb<span class="hljs-number">2</span>af<span class="hljs-number">3</span>d<span class="hljs-number">2e0</span>edc<span class="hljs-number">2234</span>a<span class="hljs-number">8</span>b<span class="hljs-number">4</span>ef<span class="hljs-number">240</span><span class="hljs-keyword">c</span><span class="hljs-number">4</span>fcfbe<span class="hljs-number">4</span>f<span class="hljs-number">31</span><span class="hljs-keyword">c</span><span class="hljs-number">693</span>be<span class="hljs-number">7</span><span class="hljs-keyword">c</span><span class="hljs-number">83</span><span class="hljs-keyword">c</span><span class="hljs-number">64</span>f<span class="hljs-number">33</span>bacceb<span class="hljs-number">800</span>f<span class="hljs-number">463</span>a<span class="hljs-number">3</span>a<span class="hljs-number">98</span>ca<span class="hljs-number">56</span>a<span class="hljs-number">40</span>bad<span class="hljs-number">7</span><span class="hljs-keyword">c</span><span class="hljs-number">5e7</span>a<span class="hljs-number">417e3</span>f<span class="hljs-number">4e012</span>f<span class="hljs-number">0</span>f<span class="hljs-number">332</span>d<span class="hljs-number">4</span><span class="hljs-keyword">c</span><span class="hljs-number">09526</span>f<span class="hljs-number">636</span>b<span class="hljs-number">795</span>f<span class="hljs-number">77696</span>e
</code></pre>
<p>Yay! Now bitcoin-s gives us an attestation that is represented by the hex string <code>fdd868...</code></p>
<p>If you submitted your announcement to the <a href="https://oracle.suredbits.com">suredbits oracle explorer</a> above
you will also want to submit the attestation for your announcement so others can find it and settle their DLCs.</p>
<p>If you use the <code>getannouncement</code> rpc along the oracle announcement, you can see the announcement is now completed!</p>
<pre><code class="hljs">./<span class="hljs-keyword">bitcoin-s-cli </span>getannouncement <span class="hljs-number">2022</span>-championship-<span class="hljs-keyword">boxing
</span>{
<span class="hljs-string">"nonces"</span>: [
<span class="hljs-string">"0a9e74e8c52ae90846cedbb2af3d2e0edc2234a8b4ef240c4fcfbe4f31c693be"</span>
],
<span class="hljs-string">"eventName"</span>: <span class="hljs-string">"2022-championship-boxing"</span>,
<span class="hljs-string">"signingVersion"</span>: <span class="hljs-string">"DLCOracleV0SigningVersion"</span>,
<span class="hljs-string">"maturationTime"</span>: <span class="hljs-string">"2022-06-16T00:00:00Z"</span>,
<span class="hljs-string">"maturationTimeEpoch"</span>: <span class="hljs-number">1655337600</span>,
<span class="hljs-string">"announcementSignature"</span>: <span class="hljs-string">"58412e9c9dc12942a9e1ed030c7bf4ff10f80b0228f9674245ae15d8a956bae6fa0186994d7e12a3b0793b67ebad83d735e9232d9e15eda5c2948d4b8a042a5e"</span>,
<span class="hljs-string">"eventDescriptorTLV"</span>: <span class="hljs-string">"fdd8061c000309526f636b795f77696e09447261676f5f77696e056f74686572"</span>,
<span class="hljs-string">"eventTLV"</span>: <span class="hljs-string">"fdd8225f00010a9e74e8c52ae90846cedbb2af3d2e0edc2234a8b4ef240c4fcfbe4f31c693be62aa7280fdd8061c000309526f636b795f77696e09447261676f5f77696e056f7468657218323032322d6368616d70696f6e736869702d626f78696e67"</span>,
<span class="hljs-string">"announcementTLV"</span>: <span class="hljs-string">"fdd824c358412e9c9dc12942a9e1ed030c7bf4ff10f80b0228f9674245ae15d8a956bae6fa0186994d7e12a3b0793b67ebad83d735e9232d9e15eda5c2948d4b8a042a5eb923f087791a31409523431b28dc20af6871f515715ab0e6219c971ee4cb75cbfdd8225f00010a9e74e8c52ae90846cedbb2af3d2e0edc2234a8b4ef240c4fcfbe4f31c693be62aa7280fdd8061c000309526f636b795f77696e09447261676f5f77696e056f7468657218323032322d6368616d70696f6e736869702d626f78696e67"</span>,
<span class="hljs-string">"attestations"</span>: <span class="hljs-string">"fdd8688518323032322d6368616d70696f6e736869702d626f78696e67b923f087791a31409523431b28dc20af6871f515715ab0e6219c971ee4cb75cb00010a9e74e8c52ae90846cedbb2af3d2e0edc2234a8b4ef240c4fcfbe4f31c693be7c83c64f33bacceb800f463a3a98ca56a40bad7c5e7a417e3f4e012f0f332d4c09526f636b795f77696e"</span>,
<span class="hljs-string">"outcomes"</span>: [
<span class="hljs-string">"Rocky_win"</span>,
<span class="hljs-string">"Drago_win"</span>,
<span class="hljs-string">"other"</span>
],
<span class="hljs-string">"signedOutcome"</span>: <span class="hljs-string">"Rocky_win"</span>,
</code></pre>
</span></div></article></div><div class="docLastUpdate"><em>Last updated on 6/16/2022 by GreyMcCarthy</em></div><div class="docs-prevnext"></div></div></div><nav class="onPageNav"><ul class="toc-headings"><li><a href="#requirements-for-example">Requirements for example</a></li><li><a href="#rocky-vs-drago-2022-boxing-championship">Rocky V.S. Drago 2022 Boxing Championship</a><ul class="toc-headings"><li><a href="#setting-up-the-boxing-bet">Setting up the boxing bet</a></li><li><a href="#signing-the-outcome-for-the-boxing-bet">Signing the outcome for the boxing bet</a></li></ul></li></ul></nav></div><footer class="nav-footer" id="footer"><section class="sitemap"><a href="/" class="nav-home"><img src="/img/favicon.ico" alt="bitcoin-s" width="66" height="58"/></a><div><h5>Docs</h5><a href="/docs/en/getting-started">Getting Started</a><a href="/docs/en/core/core-intro">Guides</a><a href="/api/org/bitcoins">API Reference</a></div><div><h5>Community</h5><a href="/en/users.html">User Showcase</a><a href="https://join.slack.com/t/suredbits/shared_invite/zt-eavycu0x-WQL7XOakzQo8tAy7jHHZUw" target="_blank" rel="noreferrer noopener">Slack</a><a href="https://gitter.im/bitcoin-s-core/">Gitter chat</a></div><div><h5>More</h5><a href="https://github.com/bitcoin-s/bitcoin-s">GitHub</a><a class="github-button" href="https://github.com/bitcoin-s/bitcoin-s" data-icon="octicon-star" data-count-href="/bitcoin-s/bitcoin-s-core/stargazers" data-show-count="true" data-count-aria-label="# stargazers on GitHub" aria-label="Star this project on GitHub">Star</a></div></section><section class="copyright">Copyright © 2022 Suredbits &amp; the bitcoin-s developers</section></footer></div><script type="text/javascript" src="https://cdn.jsdelivr.net/docsearch.js/1/docsearch.min.js"></script><script>
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