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Clinton Alexander
2017-01-03 13:07:48 +00:00
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19
docs/build/html/oracles.html vendored
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@ -1,3 +1,7 @@
<!-- If you edit this, then please make the same changes to layout_for_doc_website.html, as that is used for the web
doc site generation which we put analytics tracking on to identify any potential problem pages -->
<!DOCTYPE html>
@ -78,6 +82,11 @@
<br>
<a href="api/index.html">API reference</a>
<br>
<a href="https://discourse.corda.net">Discourse Forums</a>
<br>
<a href="http://slack.corda.net">Slack</a>
<br>
</div>
@ -107,8 +116,9 @@
<li class="toctree-l1"><a class="reference internal" href="creating-a-cordapp.html#gradle-plugins-for-cordapps">Gradle plugins for CorDapps</a></li>
<li class="toctree-l1"><a class="reference internal" href="tutorial-cordapp.html">The CorDapp Template</a></li>
<li class="toctree-l1"><a class="reference internal" href="tutorial-cordapp.html#building-the-cordapp-template">Building the CorDapp template</a></li>
<li class="toctree-l1"><a class="reference internal" href="tutorial-cordapp.html#running-the-sample-cordapp">Running the Sample CorDapp</a></li>
<li class="toctree-l1"><a class="reference internal" href="tutorial-cordapp.html#using-the-sample-cordapp">Using the sample CorDapp</a></li>
<li class="toctree-l1"><a class="reference internal" href="tutorial-cordapp.html#running-the-cordapp-template">Running the CorDapp template</a></li>
<li class="toctree-l1"><a class="reference internal" href="tutorial-cordapp.html#interacting-with-the-cordapp-template">Interacting with the CorDapp template</a></li>
<li class="toctree-l1"><a class="reference internal" href="tutorial-cordapp.html#extending-the-cordapp-template">Extending the CorDapp template</a></li>
</ul>
<p class="caption"><span class="caption-text">The Corda node</span></p>
<ul>
@ -173,6 +183,8 @@
<li class="toctree-l1"><a class="reference internal" href="release-notes.html">Release notes</a></li>
<li class="toctree-l1"><a class="reference internal" href="codestyle.html">Code style guide</a></li>
<li class="toctree-l1"><a class="reference internal" href="building-the-docs.html">Building the documentation</a></li>
<li class="toctree-l1"><a class="reference internal" href="publishing-corda.html">Publishing Corda</a></li>
<li class="toctree-l1"><a class="reference internal" href="azure-vm.html">Working with the Corda Demo on Azure Marketplace</a></li>
</ul>
<p class="caption"><span class="caption-text">Glossary</span></p>
<ul>
@ -374,7 +386,7 @@ functionality which we will not discuss further here.</p>
parameter and <code class="docutils literal"><span class="pre">CommandData</span></code> classes.</p>
<p>Let&#8217;s see how the <code class="docutils literal"><span class="pre">sign</span></code> method for <code class="docutils literal"><span class="pre">NodeInterestRates.Oracle</span></code> is written:</p>
<div class="highlight-kotlin"><div class="highlight"><pre><span></span> <span class="k">fun</span> <span class="nf">sign</span><span class="p">(</span><span class="n">ftx</span><span class="p">:</span> <span class="n">FilteredTransaction</span><span class="p">,</span> <span class="n">merkleRoot</span><span class="p">:</span> <span class="n">SecureHash</span><span class="p">):</span> <span class="n">DigitalSignature</span><span class="p">.</span><span class="n">LegallyIdentifiable</span> <span class="p">{</span>
<span class="k">if</span> <span class="p">(!</span><span class="n">ftx</span><span class="p">.</span><span class="n">verify</span><span class="p">(</span><span class="n">merkleRoot</span><span class="p">)){</span>
<span class="k">if</span> <span class="p">(!</span><span class="n">ftx</span><span class="p">.</span><span class="n">verify</span><span class="p">(</span><span class="n">merkleRoot</span><span class="p">))</span> <span class="p">{</span>
<span class="k">throw</span> <span class="n">MerkleTreeException</span><span class="p">(</span><span class="s">&quot;Rate Fix Oracle: Couldn&#39;t verify partial Merkle tree.&quot;</span><span class="p">)</span>
<span class="p">}</span>
@ -567,6 +579,7 @@ called <code class="docutils literal"><span class="pre">RatesFixFlow</span></cod
</ol>
<p>Here&#8217;s an example of it in action from <code class="docutils literal"><span class="pre">FixingFlow.Fixer</span></code>.</p>
<div class="highlight-kotlin"><div class="highlight"><pre><span></span> fun filterCommands(c: Command) = oracleParty.owningKey in c.signers &amp;&amp; c.value is Fix
val filterFuns = FilterFuns(filterCommands = ::filterCommands)
val addFixing = object : RatesFixFlow(ptx, filterFuns, oracleParty, fixOf, BigDecimal.ZERO, BigDecimal.ONE) {
@Suspendable