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<!DOCTYPE html><html lang="en"><head><meta charSet="utf-8"/><meta http-equiv="X-UA-Compatible" content="IE=edge"/><title>Executing A DLC with Bitcoin-S · bitcoin-s</title><meta name="viewport" content="width=device-width"/><meta name="generator" content="Docusaurus"/><meta name="description" content="## Executing A Discreet Log Contract (DLC)"/><meta name="docsearch:version" content="next"/><meta name="docsearch:language" content="en"/><meta property="og:title" content="Executing A DLC with Bitcoin-S · bitcoin-s"/><meta property="og:type" content="website"/><meta property="og:url" content="https://bitcoin-s.org/"/><meta property="og:description" content="## Executing A Discreet Log Contract (DLC)"/><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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</script></nav></div><div class="container mainContainer docsContainer"><div class="wrapper"><div class="post"><header class="postHeader"><a class="edit-page-link button" href="https://github.com/bitcoin-s/bitcoin-s/blob/master/docs/wallet/dlc.md" target="_blank" rel="noreferrer noopener">Edit</a><h1 id="__docusaurus" class="postHeaderTitle">Executing A DLC with Bitcoin-S</h1></header><article><div><span><h2><a class="anchor" aria-hidden="true" id="executing-a-discreet-log-contract-dlc"></a><a href="#executing-a-discreet-log-contract-dlc" 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>Executing A Discreet Log Contract (DLC)</h2>
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<h2><a class="anchor" aria-hidden="true" id="step-1-get-bitcoin-s-setup"></a><a href="#step-1-get-bitcoin-s-setup" 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>Step 1: Get Bitcoin-S Setup</h2>
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<p>See the <a href="../getting-setup">setup document</a>.</p>
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<p>Make sure to follow <a href="../getting-setup#step-4-optional-discreet-log-contract-branch">Step 4</a> to checkout the <code>adaptor-dlc</code> feature branch.</p>
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<h2><a class="anchor" aria-hidden="true" id="step-2-agree-on-contract-terms"></a><a href="#step-2-agree-on-contract-terms" 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>Step 2: Agree On Contract Terms</h2>
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<p>Both parties must agree on all fields from the table below:</p>
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<table>
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<thead>
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<tr><th style="text-align:center">Field Name</th><th style="text-align:center">Format</th></tr>
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</thead>
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<tbody>
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<tr><td style="text-align:center">oracleInfo</td><td style="text-align:center">OraclePubKeyHex ++ OracleRValueHex</td></tr>
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<tr><td style="text-align:center">contractInfo</td><td style="text-align:center">Hash1Hex ++ 8ByteValue1Hex ++ Hash2Hex ++ 8ByteValue2Hex</td></tr>
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<tr><td style="text-align:center">collateral</td><td style="text-align:center">NumInSatoshis</td></tr>
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<tr><td style="text-align:center">locktime</td><td style="text-align:center">LockTimeNum</td></tr>
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<tr><td style="text-align:center">refundlocktime</td><td style="text-align:center">LockTimeNum</td></tr>
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<tr><td style="text-align:center">feerate</td><td style="text-align:center">NumInSatoshisPerVByte</td></tr>
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</tbody>
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</table>
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<p>Here is an example <code>oracleInfo</code> for public key <code>02debeef17d7be7ced0bf346395a5c5c7177491953e91f0af2b098aac5d23cab</code> and R value <code>b1a63752e5a760f47252545b7cda933afeaf06dba3b6c6fd5356781f240c2750</code>:</p>
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<pre><code class="hljs css language-bashrc"><span class="hljs-number">02</span>debeef<span class="hljs-number">17</span>d<span class="hljs-number">7</span>be<span class="hljs-number">7</span>ced<span class="hljs-number">0</span>bf<span class="hljs-number">346395</span>a<span class="hljs-number">5</span><span class="hljs-keyword">c</span><span class="hljs-number">5</span><span class="hljs-keyword">c</span><span class="hljs-number">7177491953e91</span>f<span class="hljs-number">0</span>af<span class="hljs-number">2</span>b<span class="hljs-number">098</span>aac<span class="hljs-number">5</span>d<span class="hljs-number">23</span>cabb<span class="hljs-number">1</span>a<span class="hljs-number">63752e5</span>a<span class="hljs-number">760</span>f<span class="hljs-number">47252545</span>b<span class="hljs-number">7</span>cda<span class="hljs-number">933</span>afeaf<span class="hljs-number">06</span>dba<span class="hljs-number">3</span>b<span class="hljs-number">6</span><span class="hljs-keyword">c</span><span class="hljs-number">6</span>fd<span class="hljs-number">5356781</span>f<span class="hljs-number">240</span><span class="hljs-keyword">c</span><span class="hljs-number">2750</span>
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</code></pre>
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<p>Here is an example <code>contractInfo</code> for hashes <code>c07803e32c12e100905e8d69fe38ae72f2e7a17eb7b8dc1a9bce134b0cbe920f</code> and <code>5c58e41254e7a117ee1db59874f2334facc1576c238c16d18767b47861f93f7c</code> with respective Satoshi denominated outcomes of <code>100000 sats</code> and <code>0 sats</code>:</p>
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<pre><code class="hljs css language-bashrc"><span class="hljs-keyword">c</span><span class="hljs-number">07803e32</span><span class="hljs-keyword">c</span><span class="hljs-number">12e100905</span>e<span class="hljs-number">8</span>d<span class="hljs-number">69</span>fe<span class="hljs-number">38</span>ae<span class="hljs-number">72</span>f<span class="hljs-number">2e7</span>a<span class="hljs-number">17</span>eb<span class="hljs-number">7</span>b<span class="hljs-number">8</span>dc<span class="hljs-number">1</span>a<span class="hljs-number">9</span>bce<span class="hljs-number">134</span>b<span class="hljs-number">0</span>cbe<span class="hljs-number">920</span>fa<span class="hljs-number">0860100000000005</span><span class="hljs-keyword">c</span><span class="hljs-number">58e41254</span>e<span class="hljs-number">7</span>a<span class="hljs-number">117</span>ee<span class="hljs-number">1</span>db<span class="hljs-number">59874</span>f<span class="hljs-number">2334</span>facc<span class="hljs-number">1576</span><span class="hljs-keyword">c</span><span class="hljs-number">238</span><span class="hljs-keyword">c</span><span class="hljs-number">16</span>d<span class="hljs-number">18767</span>b<span class="hljs-number">47861</span>f<span class="hljs-number">93</span>f<span class="hljs-number">7</span><span class="hljs-keyword">c</span><span class="hljs-number">0000000000000000</span>
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</code></pre>
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<p>And finally, here are the oracle signatures for each hash in order in case you want to test with this contract:</p>
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<pre><code class="hljs css language-bashrc">f<span class="hljs-number">8758</span>d<span class="hljs-number">7</span>f<span class="hljs-number">03</span>a<span class="hljs-number">65</span>b<span class="hljs-number">67</span>b<span class="hljs-number">90</span>f<span class="hljs-number">62301</span>a<span class="hljs-number">3554849</span>bde<span class="hljs-number">6</span>d<span class="hljs-number">00</span>d<span class="hljs-number">50e965</span>eb<span class="hljs-number">123398</span>de<span class="hljs-number">9</span>fd<span class="hljs-number">6</span>ea<span class="hljs-number">7</span>fbbee<span class="hljs-number">821</span>b<span class="hljs-number">7166028</span>a<span class="hljs-number">6927282830</span><span class="hljs-keyword">c</span><span class="hljs-number">9452</span>cfcf<span class="hljs-number">3</span><span class="hljs-keyword">c</span><span class="hljs-number">5716</span><span class="hljs-keyword">c</span><span class="hljs-number">57e43</span>dd<span class="hljs-number">4069</span>ca<span class="hljs-number">87625010</span>
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</code></pre>
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<pre><code class="hljs css language-bashrc"><span class="hljs-attribute">f8758d7f03a65b67b90f62301a3554849bde6d00d50e965eb123398de9fd6ea7af05f01f1ca852cf5454a7dc91cdad7903dc2e67ddb2b3bc9d61dabd8856aa6a</span>
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</code></pre>
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<p>Note: if you wish to setup your own oracle for testing, you can do so by pasting the following into the <code>sbt core/console</code>:</p>
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<pre><code class="hljs css language-scala"><span class="hljs-keyword">import</span> org.bitcoins.crypto._
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<span class="hljs-keyword">import</span> org.bitcoins.core.currency._
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<span class="hljs-keyword">import</span> scodec.bits._
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<span class="hljs-keyword">val</span> privKey = <span class="hljs-type">ECPrivateKey</span>.freshPrivateKey
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<span class="hljs-keyword">val</span> pubKey = privKey.schnorrPublicKey
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<span class="hljs-keyword">val</span> kValue = <span class="hljs-type">ECPrivateKey</span>.freshPrivateKey
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<span class="hljs-keyword">val</span> rValue = kValue.schnorrNonce
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<span class="hljs-comment">//the hash the oracle will sign when the bitcoin price is over $9,000</span>
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<span class="hljs-keyword">val</span> winHash = <span class="hljs-type">CryptoUtil</span>.sha256(<span class="hljs-type">ByteVector</span>(<span class="hljs-string">"BTC_OVER_9000"</span>.getBytes))
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<span class="hljs-comment">//the hash the oracle with sign when the bitcoin price is under $9,000</span>
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<span class="hljs-keyword">val</span> loseHash = <span class="hljs-type">CryptoUtil</span>.sha256(<span class="hljs-type">ByteVector</span>(<span class="hljs-string">"BTC_UNDER_9000"</span>.getBytes))
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<span class="hljs-comment">//the amounts received in the case the oracle signs hash of message "BTC_OVER_9000"</span>
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<span class="hljs-keyword">val</span> amtReceivedOnWin = <span class="hljs-type">Satoshis</span>(<span class="hljs-number">100000</span>)
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<span class="hljs-comment">//the amount received in the case the oracle signs hash of message "BTC_UNDER_9000"</span>
|
||
<span class="hljs-keyword">val</span> amtReceivedOnLoss = <span class="hljs-type">Satoshis</span>.zero
|
||
|
||
(pubKey.bytes ++ rValue.bytes).toHex
|
||
(winHash.bytes ++ amtReceivedOnWin.bytes ++ loseHash.bytes ++ amtReceivedOnLoss.bytes).toHex
|
||
privKey.schnorrSignWithNonce(winHash.bytes, kValue)
|
||
privKey.schnorrSignWithNonce(loseHash.bytes, kValue)
|
||
</code></pre>
|
||
<p>Where you can replace the messages <code>WIN</code> and <code>LOSE</code> to have the oracle sign any two messages, and replace <code>Satoshis(100000)</code> and <code>Satoshis.zero</code> to change the outcomes.</p>
|
||
<h2><a class="anchor" aria-hidden="true" id="using-the-gui"></a><a href="#using-the-gui" 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>Using the GUI</h2>
|
||
<p>To first start up the GUI you first need to start your bitcoin-s server and gui with</p>
|
||
<pre><code class="hljs css language-bashrc">sbt bundle/<span class="hljs-keyword">run</span><span class="bash">
|
||
</span></code></pre>
|
||
<p>or if your bitcoin-s server is already running, you can run the standalone gui with</p>
|
||
<pre><code class="hljs css language-bashrc">sbt gui/<span class="hljs-keyword">run</span><span class="bash">
|
||
</span></code></pre>
|
||
<p>or by following the instructions for building and running the GUI <a href="../getting-setup#step-5-setting-up-a-bitcoin-s-server-neutrino-node">here</a></p>
|
||
<h3><a class="anchor" aria-hidden="true" id="step-3-setup-the-dlc"></a><a href="#step-3-setup-the-dlc" 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>Step 3: Setup The DLC</h3>
|
||
<p>If you're a visual learner there is a <a href="https://www.youtube.com/watch?v=zy1sL2ndcDg">video demo</a> that explains this process in detail. But do note that this demonstrates the old non-adaptor version of DLCs so that the Offer, Accept, Sign protocol is the same, but the contents will be different.</p>
|
||
<h4><a class="anchor" aria-hidden="true" id="creating-the-offer"></a><a href="#creating-the-offer" 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>Creating The Offer</h4>
|
||
<p>Once the terms are agreed to, either party can use the <code>Offer</code> button and enter each of the fields from the table above.</p>
|
||
<h4><a class="anchor" aria-hidden="true" id="accepting-the-offer"></a><a href="#accepting-the-offer" 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>Accepting The Offer</h4>
|
||
<p>Upon receiving a DLC Offer from your counter-party, you can use the <code>Accept</code> button and paste in the DLC Offer.</p>
|
||
<h4><a class="anchor" aria-hidden="true" id="signing-the-dlc"></a><a href="#signing-the-dlc" 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 DLC</h4>
|
||
<p>Upon receiving a DLC Accept message from your counter-party, you can use the <code>Sign</code> button and paste in the DLC Accept.</p>
|
||
<h4><a class="anchor" aria-hidden="true" id="adding-dlc-signatures-to-your-database"></a><a href="#adding-dlc-signatures-to-your-database" 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>Adding DLC Signatures To Your Database</h4>
|
||
<p>Upon receiving a DLC Sign message from your counter-party, add their signatures to your database using the <code>Add Sigs</code> button and paste in the message.
|
||
After doing so you can get the fully signed funding transaction using the <code>Get Funding Tx</code> button. This will return the fully signed serialized transaction.</p>
|
||
<h3><a class="anchor" aria-hidden="true" id="step-4-executing-the-dlc"></a><a href="#step-4-executing-the-dlc" 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>Step 4: Executing the DLC</h3>
|
||
<h4><a class="anchor" aria-hidden="true" id="execute"></a><a href="#execute" 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>Execute</h4>
|
||
<p>You can execute the DLC unilaterally with the <code>Execute</code> button which will require the oracle signature.
|
||
This will return a fully signed Contract Execution Transaction for the event signed by the oracle.</p>
|
||
<h4><a class="anchor" aria-hidden="true" id="refund"></a><a href="#refund" 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>Refund</h4>
|
||
<p>If the <code>refundlocktime</code> for the DLC has been reached, you can get the fully-signed refund transaction with the <code>Refund</code> button.</p>
|
||
<h2><a class="anchor" aria-hidden="true" id="using-the-cli"></a><a href="#using-the-cli" 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>Using the CLI</h2>
|
||
<h3><a class="anchor" aria-hidden="true" id="step-3-setup-the-dlc-1"></a><a href="#step-3-setup-the-dlc-1" 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>Step 3: Setup The DLC</h3>
|
||
<h4><a class="anchor" aria-hidden="true" id="creating-the-offer-1"></a><a href="#creating-the-offer-1" 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>Creating The Offer</h4>
|
||
<p>Once these terms are agreed to, either party can call on <code>createdlcoffer</code> with flags for each of the fields in the table above. For example:</p>
|
||
<pre><code class="hljs css language-bashrc">./app/cli/<span class="hljs-keyword">target</span>/universal/stage/bitcoin-s-cli createdlcoffer --oracleInfo <span class="hljs-number">02</span>debeef<span class="hljs-number">17</span>d<span class="hljs-number">7</span>be<span class="hljs-number">7</span>ced<span class="hljs-number">0</span>bf<span class="hljs-number">346395</span>a<span class="hljs-number">5</span><span class="hljs-keyword">c</span><span class="hljs-number">5</span><span class="hljs-keyword">c</span><span class="hljs-number">7177491953e91</span>f<span class="hljs-number">0</span>af<span class="hljs-number">2</span>b<span class="hljs-number">098</span>aac<span class="hljs-number">5</span>d<span class="hljs-number">23</span>cabb<span class="hljs-number">1</span>a<span class="hljs-number">63752e5</span>a<span class="hljs-number">760</span>f<span class="hljs-number">47252545</span>b<span class="hljs-number">7</span>cda<span class="hljs-number">933</span>afeaf<span class="hljs-number">06</span>dba<span class="hljs-number">3</span>b<span class="hljs-number">6</span><span class="hljs-keyword">c</span><span class="hljs-number">6</span>fd<span class="hljs-number">5356781</span>f<span class="hljs-number">240</span><span class="hljs-keyword">c</span><span class="hljs-number">2750</span> --contractInfo <span class="hljs-keyword">c</span><span class="hljs-number">07803e32</span><span class="hljs-keyword">c</span><span class="hljs-number">12e100905</span>e<span class="hljs-number">8</span>d<span class="hljs-number">69</span>fe<span class="hljs-number">38</span>ae<span class="hljs-number">72</span>f<span class="hljs-number">2e7</span>a<span class="hljs-number">17</span>eb<span class="hljs-number">7</span>b<span class="hljs-number">8</span>dc<span class="hljs-number">1</span>a<span class="hljs-number">9</span>bce<span class="hljs-number">134</span>b<span class="hljs-number">0</span>cbe<span class="hljs-number">920</span>fa<span class="hljs-number">0860100000000005</span><span class="hljs-keyword">c</span><span class="hljs-number">58e41254</span>e<span class="hljs-number">7</span>a<span class="hljs-number">117</span>ee<span class="hljs-number">1</span>db<span class="hljs-number">59874</span>f<span class="hljs-number">2334</span>facc<span class="hljs-number">1576</span><span class="hljs-keyword">c</span><span class="hljs-number">238</span><span class="hljs-keyword">c</span><span class="hljs-number">16</span>d<span class="hljs-number">18767</span>b<span class="hljs-number">47861</span>f<span class="hljs-number">93</span>f<span class="hljs-number">7</span><span class="hljs-keyword">c</span><span class="hljs-number">0000000000000000</span> --collateral <span class="hljs-number">40000</span> --locktime <span class="hljs-number">1666720</span> --refundlocktime <span class="hljs-number">1666730</span> --feerate <span class="hljs-number">3</span>
|
||
</code></pre>
|
||
<p>This will return a nice pretty-printed JSON offer. To get an offer that can be sent to the counter-party, add the <code>--escaped</code> flag to the end of this command.</p>
|
||
<h4><a class="anchor" aria-hidden="true" id="accepting-the-offer-1"></a><a href="#accepting-the-offer-1" 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>Accepting The Offer</h4>
|
||
<p>Upon receiving a DLC Offer from your counter-party, the following command will create the serialized accept message:</p>
|
||
<pre><code class="hljs css language-bashrc">.<span class="hljs-regexp">/app/</span>cli<span class="hljs-regexp">/target/u</span>niversal<span class="hljs-regexp">/stage/</span>bitcoin-s-cli acceptdlcoffer --offer [offer] --escaped
|
||
</code></pre>
|
||
<h4><a class="anchor" aria-hidden="true" id="signing-the-dlc-1"></a><a href="#signing-the-dlc-1" 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 DLC</h4>
|
||
<p>Upon receiving a DLC Accept message from your counter-party, the following command will generate all of your signatures for this DLC:</p>
|
||
<pre><code class="hljs css language-bashrc">.<span class="hljs-regexp">/app/</span>cli<span class="hljs-regexp">/target/u</span>niversal<span class="hljs-regexp">/stage/</span>bitcoin-s-cli signdlc --accept [accept] --escaped
|
||
</code></pre>
|
||
<h4><a class="anchor" aria-hidden="true" id="adding-dlc-signatures-to-your-database-1"></a><a href="#adding-dlc-signatures-to-your-database-1" 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>Adding DLC Signatures To Your Database</h4>
|
||
<p>Upon receiving a DLC Sign message from your counter-party, add their signatures to your database by:</p>
|
||
<pre><code class="hljs css language-bashrc">.<span class="hljs-regexp">/app/</span>cli<span class="hljs-regexp">/target/u</span>niversal<span class="hljs-regexp">/stage/</span>bitcoin-s-cli adddlcsigs --sigs [sign]
|
||
</code></pre>
|
||
<p>You are now fully setup and can generate the fully signed funding transaction for broadcast using</p>
|
||
<pre><code class="hljs css language-bashrc">.<span class="hljs-regexp">/app/</span>cli<span class="hljs-regexp">/target/u</span>niversal<span class="hljs-regexp">/stage/</span>bitcoin-s-cli getdlcfundingtx --eventid [eventid]
|
||
</code></pre>
|
||
<p>where the <code>eventid</code> is in all but the messages other than the DLC Offer message, and is also returned by the <code>adddlcsigs</code> command.</p>
|
||
<h3><a class="anchor" aria-hidden="true" id="step-4-executing-the-dlc-1"></a><a href="#step-4-executing-the-dlc-1" 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>Step 4: Executing the DLC</h3>
|
||
<h4><a class="anchor" aria-hidden="true" id="execute-1"></a><a href="#execute-1" 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>Execute</h4>
|
||
<p>Upon receiving an oracle signature, you can execute the DLC unilaterally with</p>
|
||
<pre><code class="hljs css language-bashrc">.<span class="hljs-regexp">/app/</span>cli<span class="hljs-regexp">/target/u</span>niversal<span class="hljs-regexp">/stage/</span>bitcoin-s-cli executedlc --eventid [eventid] --oraclesig [sig]
|
||
</code></pre>
|
||
<p>which will return fully signed Contract Execution Transaction for the event signed by the oracle.</p>
|
||
<h4><a class="anchor" aria-hidden="true" id="refund-1"></a><a href="#refund-1" 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>Refund</h4>
|
||
<p>If the <code>refundlocktime</code> for the DLC has been reached, you can get the fully-signed refund transaction with</p>
|
||
<pre><code class="hljs css language-bashrc">.<span class="hljs-regexp">/app/</span>cli<span class="hljs-regexp">/target/u</span>niversal<span class="hljs-regexp">/stage/</span>bitcoin-s-cli executedlcrefund --eventid [eventid]
|
||
</code></pre>
|
||
</span></div></article></div><div class="docs-prevnext"><a class="docs-prev button" href="/docs/next/wallet/address-tagging"><span class="arrow-prev">← </span><span>Address and UTXO tagging</span></a><a class="docs-next button" href="/docs/next/wallet/wallet-rescan"><span>Wallet Rescans</span><span class="arrow-next"> →</span></a></div></div></div><nav class="onPageNav"><ul class="toc-headings"><li><a href="#executing-a-discreet-log-contract-dlc">Executing A Discreet Log Contract (DLC)</a></li><li><a href="#step-1-get-bitcoin-s-setup">Step 1: Get Bitcoin-S Setup</a></li><li><a href="#step-2-agree-on-contract-terms">Step 2: Agree On Contract Terms</a></li><li><a href="#using-the-gui">Using the GUI</a><ul class="toc-headings"><li><a href="#step-3-setup-the-dlc">Step 3: Setup The DLC</a></li><li><a href="#step-4-executing-the-dlc">Step 4: Executing the DLC</a></li></ul></li><li><a href="#using-the-cli">Using the CLI</a><ul class="toc-headings"><li><a href="#step-3-setup-the-dlc-1">Step 3: Setup The DLC</a></li><li><a href="#step-4-executing-the-dlc-1">Step 4: Executing the DLC</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 © 2021 Suredbits & 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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