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<li class="toctree-l1 current"><a class="current reference internal" href="#">Running the demos</a>
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<li class="toctree-l2"><a class="reference internal" href="#trader-demo">Trader demo</a>
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<div class="section" id="running-the-demos">
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<h1>Running the demos<a class="headerlink" href="#running-the-demos"
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title="Permalink to this headline">¶</a></h1>
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<p>The repository contains a small number of demo programs that run two-node networks,
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demonstrating functionality developed
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so far. We have:</p>
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<ol class="arabic simple">
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<li>The trader demo, which shows a delivery-vs-payment atomic swap of commercial paper
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for cash. You can learn more about
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how this works in <a class="reference internal" href="protocol-state-machines.html"><span
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class="doc">Protocol state machines</span></a>.
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</li>
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<li>The IRS demo, which shows two nodes establishing an interest rate swap between them
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and performing fixings with a
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rates oracle, all driven via the HTTP API.
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</li>
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</ol>
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<p>The demos have only been tested on MacOS X and Ubuntu Linux. If you have success on other
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platforms, please let us know.</p>
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<p>The demos create node data directories in the root of the project. If something goes
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wrong with them, blow away the
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directories and try again.</p>
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<p>For Windows users, the contents of the shell scripts are very trivial and can easily be
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done by hand from a command
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window. Essentially, it just runs Gradle to create the startup scripts, and then starts
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the node with one set of
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flags or another. Alternatively you could play with the new Linux syscall support in
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Windows 10!</p>
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<div class="section" id="trader-demo">
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<h2>Trader demo<a class="headerlink" href="#trader-demo"
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title="Permalink to this headline">¶</a></h2>
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<p>Open two terminals, and in the first run::</p>
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<div class="highlight-kotlin">
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<div class="highlight"><pre><span></span><span class="p">./</span><span class="n">scripts</span><span
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class="p">/</span><span class="n">trader</span><span class="p">-</span><span
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class="n">demo</span><span class="p">.</span><span class="n">sh</span> <span
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class="n">buyer</span>
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</pre>
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</div>
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</div>
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<p>It will compile things, if necessary, then create a directory named “buyer”
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with a bunch of files inside and start
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the node. You should see it waiting for a trade to begin.</p>
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<p>In the second terminal, run:</p>
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<div class="highlight-kotlin">
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<div class="highlight"><pre><span></span><span class="p">./</span><span class="n">scripts</span><span
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class="p">/</span><span class="n">trader</span><span class="p">-</span><span
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class="n">demo</span><span class="p">.</span><span class="n">sh</span> <span
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class="n">seller</span>
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</pre>
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</div>
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</div>
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<p>You should see some log lines scroll past, and within a few seconds the messages
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“Purchase complete - we are a
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happy customer!” and “Sale completed - we have a happy customer!”
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should be printed.</p>
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<p>If it doesn’t work, jump on the mailing list and let us know.</p>
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</div>
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<div class="section" id="irs-demo">
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<h2>IRS demo<a class="headerlink" href="#irs-demo"
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title="Permalink to this headline">¶</a></h2>
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<p>Open three terminals. In the first run::</p>
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<div class="highlight-kotlin">
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<div class="highlight"><pre><span></span><span class="p">./</span><span class="n">scripts</span><span
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class="p">/</span><span class="n">irs</span><span class="p">-</span><span
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class="n">demo</span><span class="p">.</span><span class="n">sh</span> <span
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class="n">nodeA</span>
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</pre>
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</div>
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</div>
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<p>And in the second run::</p>
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<div class="highlight-kotlin">
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<div class="highlight"><pre><span></span><span class="p">./</span><span class="n">scripts</span><span
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class="p">/</span><span class="n">irs</span><span class="p">-</span><span
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class="n">demo</span><span class="p">.</span><span class="n">sh</span> <span
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class="n">nodeB</span>
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</pre>
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</div>
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</div>
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<p>The node in the first terminal will complain that it didn’t know about nodeB,
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so restart it. It’ll then find the
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location and identity keys of nodeA and be happy. NodeB also doubles up as the
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interest rates oracle and you should
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see some rates data get loaded.</p>
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<p>Now in the third terminal run::</p>
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<div class="highlight-kotlin">
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<div class="highlight"><pre><span></span><span class="p">./</span><span class="n">scripts</span><span
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class="p">/</span><span class="n">irs</span><span class="p">-</span><span
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class="n">demo</span><span class="p">.</span><span class="n">sh</span> <span
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class="n">trade</span> <span class="n">trade1</span>
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</pre>
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</div>
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</div>
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<p>You should see some activity in the other two terminals as they set up the deal.
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Further instructions will be printed
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at this point showing how to advance the current date, so you can see them perform
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fixings and (eventually) complete
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the deal.</p>
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