s="o">+</span> <span class="s">' doesn</span><span class="se">\'</span><span class="s">t exist on this chain!'</span><span class="p">)</span>
    <span class="nb">exit</span><span class="p">()</span>
</code></pre></div></div>

<h4 id="3-active-witness-list-">3. Active witness list <a name="list"></a></h4>

<p>We create a list of active witnesses so the user knows which witnesses are available to vote for. We do this by sending a query to the blockchain using the <code class="highlighter-rouge">get_active_wi