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<div class="admonition note" id="eth-net">
<p class="first admonition-title">Note</p>
<p class="last">This documentation is work in progress and web3.js 1.0 stable is not yet released! You can find the current documentation for web3 0.x.x at <a class="reference external" href="https://github.com/ethereum/wiki/wiki/JavaScript-API">github.com/ethereum/wiki/wiki/JavaScript-API</a>.</p>
</div>
<div class="section" id="web3-eth-net">
<h1>web3.eth.net<a class="headerlink" href="#web3-eth-net" title="Permalink to this headline"></a></h1>
<p>Contains functions to receive information about the current network.</p>
<hr class="docutils" />
<div class="section" id="getid">
<span id="net-getid"></span><h2>getId<a class="headerlink" href="#getid" title="Permalink to this headline"></a></h2>
<div class="highlight-javascript notranslate"><div class="highlight"><pre><span></span><span class="nx">web3</span><span class="p">.</span><span class="nx">eth</span><span class="p">.</span><span class="nx">net</span><span class="p">.</span><span class="nx">getId</span><span class="p">([</span><span class="nx">callback</span><span class="p">])</span>
<span class="nx">web3</span><span class="p">.</span><span class="nx">bzz</span><span class="p">.</span><span class="nx">net</span><span class="p">.</span><span class="nx">getId</span><span class="p">([</span><span class="nx">callback</span><span class="p">])</span>
<span class="nx">web3</span><span class="p">.</span><span class="nx">shh</span><span class="p">.</span><span class="nx">net</span><span class="p">.</span><span class="nx">getId</span><span class="p">([</span><span class="nx">callback</span><span class="p">])</span>
</pre></div>
</div>
<p>Gets the current network ID.</p>
<div class="section" id="parameters">
<h3>Parameters<a class="headerlink" href="#parameters" title="Permalink to this headline"></a></h3>
<p>none</p>
</div>
<div class="section" id="returns">
<h3>Returns<a class="headerlink" href="#returns" title="Permalink to this headline"></a></h3>
<p><code class="docutils literal notranslate"><span class="pre">Promise</span></code> returns <code class="docutils literal notranslate"><span class="pre">Number</span></code>: The network ID.</p>
</div>
<div class="section" id="example">
<h3>Example<a class="headerlink" href="#example" title="Permalink to this headline"></a></h3>
<div class="highlight-javascript notranslate"><div class="highlight"><pre><span></span><span class="nx">web3</span><span class="p">.</span><span class="nx">eth</span><span class="p">.</span><span class="nx">net</span><span class="p">.</span><span class="nx">getId</span><span class="p">()</span>
<span class="p">.</span><span class="nx">then</span><span class="p">(</span><span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">);</span>
<span class="o">&gt;</span> <span class="mi">1</span>
</pre></div>
</div>
</div>
</div>
<hr class="docutils" />
<div class="section" id="islistening">
<h2>isListening<a class="headerlink" href="#islistening" title="Permalink to this headline"></a></h2>
<div class="highlight-javascript notranslate"><div class="highlight"><pre><span></span><span class="nx">web3</span><span class="p">.</span><span class="nx">eth</span><span class="p">.</span><span class="nx">net</span><span class="p">.</span><span class="nx">isListening</span><span class="p">([</span><span class="nx">callback</span><span class="p">])</span>
<span class="nx">web3</span><span class="p">.</span><span class="nx">bzz</span><span class="p">.</span><span class="nx">net</span><span class="p">.</span><span class="nx">isListening</span><span class="p">([</span><span class="nx">callback</span><span class="p">])</span>
<span class="nx">web3</span><span class="p">.</span><span class="nx">shh</span><span class="p">.</span><span class="nx">net</span><span class="p">.</span><span class="nx">isListening</span><span class="p">([</span><span class="nx">callback</span><span class="p">])</span>
</pre></div>
</div>
<p>Checks if the node is listening for peers.</p>
<div class="section" id="id1">
<h3>Parameters<a class="headerlink" href="#id1" title="Permalink to this headline"></a></h3>
<p>none</p>
</div>
<div class="section" id="id2">
<h3>Returns<a class="headerlink" href="#id2" title="Permalink to this headline"></a></h3>
<p><code class="docutils literal notranslate"><span class="pre">Promise</span></code> returns <code class="docutils literal notranslate"><span class="pre">Boolean</span></code></p>
</div>
<div class="section" id="id3">
<h3>Example<a class="headerlink" href="#id3" title="Permalink to this headline"></a></h3>
<div class="highlight-javascript notranslate"><div class="highlight"><pre><span></span><span class="nx">web3</span><span class="p">.</span><span class="nx">eth</span><span class="p">.</span><span class="nx">isListening</span><span class="p">()</span>
<span class="p">.</span><span class="nx">then</span><span class="p">(</span><span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">);</span>
<span class="o">&gt;</span> <span class="kc">true</span>
</pre></div>
</div>
</div>
</div>
<hr class="docutils" />
<div class="section" id="getpeercount">
<h2>getPeerCount<a class="headerlink" href="#getpeercount" title="Permalink to this headline"></a></h2>
<div class="highlight-javascript notranslate"><div class="highlight"><pre><span></span><span class="nx">web3</span><span class="p">.</span><span class="nx">eth</span><span class="p">.</span><span class="nx">net</span><span class="p">.</span><span class="nx">getPeerCount</span><span class="p">([</span><span class="nx">callback</span><span class="p">])</span>
<span class="nx">web3</span><span class="p">.</span><span class="nx">bzz</span><span class="p">.</span><span class="nx">net</span><span class="p">.</span><span class="nx">getPeerCount</span><span class="p">([</span><span class="nx">callback</span><span class="p">])</span>
<span class="nx">web3</span><span class="p">.</span><span class="nx">shh</span><span class="p">.</span><span class="nx">net</span><span class="p">.</span><span class="nx">getPeerCount</span><span class="p">([</span><span class="nx">callback</span><span class="p">])</span>
</pre></div>
</div>
<p>Get the number of peers connected to.</p>
<div class="section" id="id4">
<h3>Parameters<a class="headerlink" href="#id4" title="Permalink to this headline"></a></h3>
<p>none</p>
</div>
<div class="section" id="id5">
<h3>Returns<a class="headerlink" href="#id5" title="Permalink to this headline"></a></h3>
<p><code class="docutils literal notranslate"><span class="pre">Promise</span></code> returns <code class="docutils literal notranslate"><span class="pre">Number</span></code></p>
</div>
<div class="section" id="id6">
<h3>Example<a class="headerlink" href="#id6" title="Permalink to this headline"></a></h3>
<div class="highlight-javascript notranslate"><div class="highlight"><pre><span></span><span class="nx">web3</span><span class="p">.</span><span class="nx">eth</span><span class="p">.</span><span class="nx">getPeerCount</span><span class="p">()</span>
<span class="p">.</span><span class="nx">then</span><span class="p">(</span><span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">);</span>
<span class="o">&gt;</span> <span class="mi">25</span>
</pre></div>
</div>
</div>
</div>
<hr class="docutils" />
<div class="section" id="getnetworktype">
<h2>getNetworkType<a class="headerlink" href="#getnetworktype" title="Permalink to this headline"></a></h2>
<div class="highlight-javascript notranslate"><div class="highlight"><pre><span></span><span class="nx">web3</span><span class="p">.</span><span class="nx">eth</span><span class="p">.</span><span class="nx">net</span><span class="p">.</span><span class="nx">getNetworkType</span><span class="p">([</span><span class="nx">callback</span><span class="p">])</span>
</pre></div>
</div>
<p>Guesses the chain the node is connected by comparing the genesis hashes.</p>
<div class="admonition note">
<p class="first admonition-title">Note</p>
<p class="last">This is not a 100% accurate guess as any private network could use testnet and mainnet genesis blocks and network IDs.</p>
</div>
<div class="section" id="id7">
<h3>Returns<a class="headerlink" href="#id7" title="Permalink to this headline"></a></h3>
<dl class="docutils">
<dt><code class="docutils literal notranslate"><span class="pre">Promise</span></code> returns <code class="docutils literal notranslate"><span class="pre">String</span></code>:</dt>
<dd><ul class="first last simple">
<li><code class="docutils literal notranslate"><span class="pre">&quot;main&quot;</span></code> for main network</li>
<li><code class="docutils literal notranslate"><span class="pre">&quot;morden&quot;</span></code> for the morden test network</li>
<li><code class="docutils literal notranslate"><span class="pre">&quot;ropsten&quot;</span></code> for the morden test network</li>
<li><code class="docutils literal notranslate"><span class="pre">&quot;private&quot;</span></code> for undetectable networks.</li>
</ul>
</dd>
</dl>
</div>
<div class="section" id="id8">
<h3>Example<a class="headerlink" href="#id8" title="Permalink to this headline"></a></h3>
<div class="highlight-javascript notranslate"><div class="highlight"><pre><span></span><span class="nx">web3</span><span class="p">.</span><span class="nx">eth</span><span class="p">.</span><span class="nx">net</span><span class="p">.</span><span class="nx">getNetworkType</span><span class="p">()</span>
<span class="p">.</span><span class="nx">then</span><span class="p">(</span><span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">);</span>
<span class="o">&gt;</span> <span class="s2">&quot;main&quot;</span>
</pre></div>
</div>
</div>
</div>
</div>
</div>
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<h3><a href="index.html">Table of Contents</a></h3>
<ul>
<li><a class="reference internal" href="#">web3.eth.net</a><ul>
<li><a class="reference internal" href="#getid">getId</a><ul>
<li><a class="reference internal" href="#parameters">Parameters</a></li>
<li><a class="reference internal" href="#returns">Returns</a></li>
<li><a class="reference internal" href="#example">Example</a></li>
</ul>
</li>
<li><a class="reference internal" href="#islistening">isListening</a><ul>
<li><a class="reference internal" href="#id1">Parameters</a></li>
<li><a class="reference internal" href="#id2">Returns</a></li>
<li><a class="reference internal" href="#id3">Example</a></li>
</ul>
</li>
<li><a class="reference internal" href="#getpeercount">getPeerCount</a><ul>
<li><a class="reference internal" href="#id4">Parameters</a></li>
<li><a class="reference internal" href="#id5">Returns</a></li>
<li><a class="reference internal" href="#id6">Example</a></li>
</ul>
</li>
<li><a class="reference internal" href="#getnetworktype">getNetworkType</a><ul>
<li><a class="reference internal" href="#id7">Returns</a></li>
<li><a class="reference internal" href="#id8">Example</a></li>
</ul>
</li>
</ul>
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<h4>Next topic</h4>
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