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<html><head><meta charset="utf-8"/><meta name="viewport" content="width=device-width, initial-scale=1.0"/><title>libp2p - Documentation</title><link href="https://fonts.googleapis.com/css?family=Roboto+Mono:400,500|Roboto:300,500,700" rel="stylesheet"/><style>body{margin: 0;
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font-weight: bold;}.hljs-deletion{background: #fdd;}.hljs-addition{background: #dfd;}.hljs-emphasis{font-style: italic;}.hljs-strong{font-weight: bold;}</style><div style="margin-bottom:104px;" data-radium="true"><h1 data-radium="true"><a class="anchor" name="intro"></a>Intro</h1><div><p>Installable via <code>npm install --save libp2p</code>, it can also be used directly in the browser.</p>
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<h2>Download</h2>
<p>The source is available for download from <a href="https://github.com/libp2p/js-libp2p.git">GitHub</a>. Alternatively, you can install using npm:</p>
<pre class='hljs'>$ npm install --save libp2p</pre>
<p>You can then <code>require()</code> libp2p as normal:</p>
<pre class='hljs'><span class="hljs-keyword">const</span> libp2P = <span class="hljs-built_in">require</span>(<span class="hljs-string">'libp2p'</span>)</pre>
<h2>In the Browser</h2>
<p>Libp2p should work in any ES2015 environment out of the box.</p>
<p>Usage:</p>
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<pre class='hljs'><span class="hljs-tag">&lt;<span class="hljs-name">script</span> <span class="hljs-attr">type</span>=<span class="hljs-string">"text/javascript"</span> <span class="hljs-attr">src</span>=<span class="hljs-string">"index.js"</span>&gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">script</span>&gt;</span></pre>
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<p>The portable versions of libp2p, including <code>index.js</code> and <code>index.min.js</code>, are included in the <code>/dist</code> folder. Libp2p can also be found on <a href="https://unpkg.com">unpkg.com</a> under</p>
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<ul>
<li><a href="https://unpkg.com/libp2p/dist/index.min.js">https://unpkg.com/libp2p/dist/index.min.js</a></li>
<li><a href="https://unpkg.com/libp2p/dist/index.js">https://unpkg.com/libp2p/dist/index.js</a></li>
</ul>
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</div></div><div style="margin-bottom:104px;" data-radium="true"><h1 data-radium="true"><a class="anchor" name="libp2p"></a>Libp2p<a href="https://github.com/libp2p/js-libp2p/blob/8e95df7f22e90f424f14bc6a2e61c6291484496c/src/index.js#L46-L550" title="src/index.js" style="float:right;" data-radium="true"><svg fill="currentColor" preserveAspectRatio="xMidYMid meet" height="1em" width="1em" viewBox="0 0 40 40" style="vertical-align:middle;"><g><path d="m26.3 7.5l-3.8 3.8 8.8 8.7-8.8 8.8 3.8 3.7 11.2-12.5-11.2-12.5z m-12.5 0l-11.3 12.5 11.3 12.5 3.7-3.7-8.7-8.8 8.7-8.7-3.7-3.8z"></path></g></svg></a></h1><div></div><div style="display:inline;" data-radium="true"><span> Extends </span><span>EventEmitter.</span></div><div data-radium="true"><h4>Parameters</h4><ol style="list-style:none;margin-left:0;padding-left:0;" data-radium="true"><div data-radium="true"><li style="padding-bottom:13px;" data-radium="true"><code>_options: any</code>:  <div style="display:inline-block;" data-radium="true"></div></li></div></ol></div><div data-radium="true"><h2 style="text-transform:uppercase;" data-radium="true">instance</h2><div style="margin-bottom:52px;" data-radium="true"><h3 data-radium="true"><a class="anchor" name="libp2pemit"></a>Libp2p.prototype.emit<a href="https://github.com/libp2p/js-libp2p/blob/8e95df7f22e90f424f14bc6a2e61c6291484496c/src/index.js#L198-L204" title="src/index.js" style="float:right;" data-radium="true"><svg fill="currentColor" preserveAspectRatio="xMidYMid meet" height="1em" width="1em" viewBox="0 0 40 40" style="vertical-align:middle;"><g><path d="m26.3 7.5l-3.8 3.8 8.8 8.7-8.8 8.8 3.8 3.7 11.2-12.5-11.2-12.5z m-12.5 0l-11.3 12.5 11.3 12.5 3.7-3.7-8.7-8.8 8.7-8.7-3.7-3.8z"></path></g></svg></a></h3><pre><code>emit(eventName: <a href="https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String">string</a>, args: ...any): void</code></pre><div style="margin-top:13px;margin-bottom:13px;" data-radium="true"><p>Overrides EventEmitter.emit to conditionally emit errors
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if there is a handler. If not, errors will be logged.</p>
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</div><div data-radium="true"><h4>Parameters</h4><ol style="list-style:none;margin-left:0;padding-left:0;" data-radium="true"><div data-radium="true"><li style="padding-bottom:13px;" data-radium="true"><code>eventName: <a href="https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String">string</a></code>:  <div style="display:inline-block;" data-radium="true"></div></li></div><div data-radium="true"><li style="padding-bottom:13px;" data-radium="true"><code>args: ...any</code>:  <div style="display:inline-block;" data-radium="true"></div></li></div></ol></div><div data-radium="true"><h4>Returns</h4><div data-radium="true"><code>void</code><span>
</span></div></div></div><div style="margin-bottom:52px;" data-radium="true"><h3 data-radium="true"><a class="anchor" name="libp2pstart"></a>Libp2p.prototype.start<a href="https://github.com/libp2p/js-libp2p/blob/8e95df7f22e90f424f14bc6a2e61c6291484496c/src/index.js#L212-L215" title="src/index.js" style="float:right;" data-radium="true"><svg fill="currentColor" preserveAspectRatio="xMidYMid meet" height="1em" width="1em" viewBox="0 0 40 40" style="vertical-align:middle;"><g><path d="m26.3 7.5l-3.8 3.8 8.8 8.7-8.8 8.8 3.8 3.7 11.2-12.5-11.2-12.5z m-12.5 0l-11.3 12.5 11.3 12.5 3.7-3.7-8.7-8.8 8.7-8.7-3.7-3.8z"></path></g></svg></a></h3><pre><code>start(callback: function (<a href="https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Error">Error</a>)): void</code></pre><div style="margin-top:13px;margin-bottom:13px;" data-radium="true"><p>Starts the libp2p node and all sub services</p>
</div><div data-radium="true"><h4>Parameters</h4><ol style="list-style:none;margin-left:0;padding-left:0;" data-radium="true"><div data-radium="true"><li style="padding-bottom:13px;" data-radium="true"><code>callback: function (<a href="https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Error">Error</a>) (=()=>{})</code>:  <div style="display:inline-block;" data-radium="true"></div></li></div></ol></div><div data-radium="true"><h4>Returns</h4><div data-radium="true"><code>void</code><span>
</span></div></div></div><div style="margin-bottom:52px;" data-radium="true"><h3 data-radium="true"><a class="anchor" name="libp2pstop"></a>Libp2p.prototype.stop<a href="https://github.com/libp2p/js-libp2p/blob/8e95df7f22e90f424f14bc6a2e61c6291484496c/src/index.js#L223-L226" title="src/index.js" style="float:right;" data-radium="true"><svg fill="currentColor" preserveAspectRatio="xMidYMid meet" height="1em" width="1em" viewBox="0 0 40 40" style="vertical-align:middle;"><g><path d="m26.3 7.5l-3.8 3.8 8.8 8.7-8.8 8.8 3.8 3.7 11.2-12.5-11.2-12.5z m-12.5 0l-11.3 12.5 11.3 12.5 3.7-3.7-8.7-8.8 8.7-8.7-3.7-3.8z"></path></g></svg></a></h3><pre><code>stop(callback: function (<a href="https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Error">Error</a>)): void</code></pre><div style="margin-top:13px;margin-bottom:13px;" data-radium="true"><p>Stop the libp2p node by closing its listeners and open connections</p>
</div><div data-radium="true"><h4>Parameters</h4><ol style="list-style:none;margin-left:0;padding-left:0;" data-radium="true"><div data-radium="true"><li style="padding-bottom:13px;" data-radium="true"><code>callback: function (<a href="https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Error">Error</a>) (=()=>{})</code>:  <div style="display:inline-block;" data-radium="true"></div></li></div></ol></div><div data-radium="true"><h4>Returns</h4><div data-radium="true"><code>void</code><span>
</span></div></div></div><div style="margin-bottom:52px;" data-radium="true"><h3 data-radium="true"><a class="anchor" name="libp2pdial"></a>Libp2p.prototype.dial<a href="https://github.com/libp2p/js-libp2p/blob/8e95df7f22e90f424f14bc6a2e61c6291484496c/src/index.js#L240-L242" title="src/index.js" style="float:right;" data-radium="true"><svg fill="currentColor" preserveAspectRatio="xMidYMid meet" height="1em" width="1em" viewBox="0 0 40 40" style="vertical-align:middle;"><g><path d="m26.3 7.5l-3.8 3.8 8.8 8.7-8.8 8.8 3.8 3.7 11.2-12.5-11.2-12.5z m-12.5 0l-11.3 12.5 11.3 12.5 3.7-3.7-8.7-8.8 8.7-8.7-3.7-3.8z"></path></g></svg></a></h3><pre><code>dial(peer: (PeerInfo | PeerId | Multiaddr | <a href="https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String">string</a>), callback: function (<a href="https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Error">Error</a>)): void</code></pre><div style="margin-top:13px;margin-bottom:13px;" data-radium="true"><p>Dials to the provided peer. If successful, the <code>PeerInfo</code> of the
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peer will be added to the nodes <code>PeerBook</code></p>
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</div><div data-radium="true"><h4>Parameters</h4><ol style="list-style:none;margin-left:0;padding-left:0;" data-radium="true"><div data-radium="true"><li style="padding-bottom:13px;" data-radium="true"><code>peer: (PeerInfo | PeerId | Multiaddr | <a href="https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String">string</a>)</code>:  <div style="display:inline-block;" data-radium="true">The peer to dial
</div></li></div><div data-radium="true"><li style="padding-bottom:13px;" data-radium="true"><code>callback: function (<a href="https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Error">Error</a>)</code>:  <div style="display:inline-block;" data-radium="true"></div></li></div></ol></div><div data-radium="true"><h4>Returns</h4><div data-radium="true"><code>void</code><span>
</span></div></div></div><div style="margin-bottom:52px;" data-radium="true"><h3 data-radium="true"><a class="anchor" name="libp2pdialprotocol"></a>Libp2p.prototype.dialProtocol<a href="https://github.com/libp2p/js-libp2p/blob/8e95df7f22e90f424f14bc6a2e61c6291484496c/src/index.js#L254-L269" title="src/index.js" style="float:right;" data-radium="true"><svg fill="currentColor" preserveAspectRatio="xMidYMid meet" height="1em" width="1em" viewBox="0 0 40 40" style="vertical-align:middle;"><g><path d="m26.3 7.5l-3.8 3.8 8.8 8.7-8.8 8.8 3.8 3.7 11.2-12.5-11.2-12.5z m-12.5 0l-11.3 12.5 11.3 12.5 3.7-3.7-8.7-8.8 8.7-8.7-3.7-3.8z"></path></g></svg></a></h3><pre><code>dialProtocol(peer: (PeerInfo | PeerId | Multiaddr | <a href="https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String">string</a>), protocol: <a href="https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String">string</a>, callback: function (<a href="https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Error">Error</a>, Connection)): void</code></pre><div style="margin-top:13px;margin-bottom:13px;" data-radium="true"><p>Dials to the provided peer and handshakes with the given protocol.
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If successful, the <code>PeerInfo</code> of the peer will be added to the nodes <code>PeerBook</code>,
and the <code>Connection</code> will be sent in the callback</p>
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</div><div data-radium="true"><h4>Parameters</h4><ol style="list-style:none;margin-left:0;padding-left:0;" data-radium="true"><div data-radium="true"><li style="padding-bottom:13px;" data-radium="true"><code>peer: (PeerInfo | PeerId | Multiaddr | <a href="https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String">string</a>)</code>:  <div style="display:inline-block;" data-radium="true">The peer to dial
</div></li></div><div data-radium="true"><li style="padding-bottom:13px;" data-radium="true"><code>protocol: <a href="https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String">string</a></code>:  <div style="display:inline-block;" data-radium="true"></div></li></div><div data-radium="true"><li style="padding-bottom:13px;" data-radium="true"><code>callback: function (<a href="https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Error">Error</a>, Connection)</code>:  <div style="display:inline-block;" data-radium="true"></div></li></div></ol></div><div data-radium="true"><h4>Returns</h4><div data-radium="true"><code>void</code><span>
</span></div></div></div><div style="margin-bottom:52px;" data-radium="true"><h3 data-radium="true"><a class="anchor" name="libp2pdialfsm"></a>Libp2p.prototype.dialFSM<a href="https://github.com/libp2p/js-libp2p/blob/8e95df7f22e90f424f14bc6a2e61c6291484496c/src/index.js#L280-L295" title="src/index.js" style="float:right;" data-radium="true"><svg fill="currentColor" preserveAspectRatio="xMidYMid meet" height="1em" width="1em" viewBox="0 0 40 40" style="vertical-align:middle;"><g><path d="m26.3 7.5l-3.8 3.8 8.8 8.7-8.8 8.8 3.8 3.7 11.2-12.5-11.2-12.5z m-12.5 0l-11.3 12.5 11.3 12.5 3.7-3.7-8.7-8.8 8.7-8.7-3.7-3.8z"></path></g></svg></a></h3><pre><code>dialFSM(peer: (PeerInfo | PeerId | Multiaddr | <a href="https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String">string</a>), protocol: <a href="https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String">string</a>, callback: function (<a href="https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Error">Error</a>, ConnectionFSM)): void</code></pre><div style="margin-top:13px;margin-bottom:13px;" data-radium="true"><p>Similar to <code>dial</code> and <code>dialProtocol</code>, but the callback will contain a
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Connection State Machine.</p>
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</div><div data-radium="true"><h4>Parameters</h4><ol style="list-style:none;margin-left:0;padding-left:0;" data-radium="true"><div data-radium="true"><li style="padding-bottom:13px;" data-radium="true"><code>peer: (PeerInfo | PeerId | Multiaddr | <a href="https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String">string</a>)</code>:  <div style="display:inline-block;" data-radium="true">The peer to dial
</div></li></div><div data-radium="true"><li style="padding-bottom:13px;" data-radium="true"><code>protocol: <a href="https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String">string</a></code>:  <div style="display:inline-block;" data-radium="true"></div></li></div><div data-radium="true"><li style="padding-bottom:13px;" data-radium="true"><code>callback: function (<a href="https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Error">Error</a>, ConnectionFSM)</code>:  <div style="display:inline-block;" data-radium="true"></div></li></div></ol></div><div data-radium="true"><h4>Returns</h4><div data-radium="true"><code>void</code><span>
</span></div></div></div></div></div><div style="margin-bottom:104px;" data-radium="true"><h1 data-radium="true"><a class="anchor" name="createlibp2p"></a>createLibp2p<a href="https://github.com/libp2p/js-libp2p/blob/8e95df7f22e90f424f14bc6a2e61c6291484496c/src/index.js#L560-L569" title="src/index.js" style="float:right;" data-radium="true"><svg fill="currentColor" preserveAspectRatio="xMidYMid meet" height="1em" width="1em" viewBox="0 0 40 40" style="vertical-align:middle;"><g><path d="m26.3 7.5l-3.8 3.8 8.8 8.7-8.8 8.8 3.8 3.7 11.2-12.5-11.2-12.5z m-12.5 0l-11.3 12.5 11.3 12.5 3.7-3.7-8.7-8.8 8.7-8.7-3.7-3.8z"></path></g></svg></a></h1><div><p>Like <code>new Libp2p(options)</code> except it will create a <code>PeerInfo</code>
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instance if one is not provided in options.</p>
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</div><div data-radium="true"><h4>Parameters</h4><ol style="list-style:none;margin-left:0;padding-left:0;" data-radium="true"><div data-radium="true"><li style="padding-bottom:13px;" data-radium="true"><code>options: <a href="https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object">object</a></code>:  <div style="display:inline-block;" data-radium="true">Libp2p configuration options
</div></li></div><div data-radium="true"><li style="padding-bottom:13px;" data-radium="true"><code>callback: function (<a href="https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Error">Error</a>, <a href="#libp2p">Libp2p</a>)</code>:  <div style="display:inline-block;" data-radium="true"></div></li></div></ol></div><div data-radium="true"><h4>Returns</h4><div data-radium="true"><code>void</code><span>
</span></div></div></div><div style="margin-bottom:104px;" data-radium="true"><h1 data-radium="true"><a class="anchor" name="findpeer"></a>findPeer<a href="https://github.com/libp2p/js-libp2p/blob/8e95df7f22e90f424f14bc6a2e61c6291484496c/src/peer-routing.js#L24-L56" title="src/peer-routing.js" style="float:right;" data-radium="true"><svg fill="currentColor" preserveAspectRatio="xMidYMid meet" height="1em" width="1em" viewBox="0 0 40 40" style="vertical-align:middle;"><g><path d="m26.3 7.5l-3.8 3.8 8.8 8.7-8.8 8.8 3.8 3.7 11.2-12.5-11.2-12.5z m-12.5 0l-11.3 12.5 11.3 12.5 3.7-3.7-8.7-8.8 8.7-8.7-3.7-3.8z"></path></g></svg></a></h1><div><p>Iterates over all peer routers in series to find the given peer.</p>
</div><div data-radium="true"><h4>Parameters</h4><ol style="list-style:none;margin-left:0;padding-left:0;" data-radium="true"><div data-radium="true"><li style="padding-bottom:13px;" data-radium="true"><code>id: <a href="https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String">String</a></code>:  <div style="display:inline-block;" data-radium="true">The id of the peer to find
</div></li></div><div data-radium="true"><li style="padding-bottom:13px;" data-radium="true"><code>options: <a href="https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object">object</a></code>:  <div style="display:inline-block;" data-radium="true"></div></li><li style="padding-bottom:13px;" data-radium="true"><code>options.maxTimeout: <a href="https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Number">number</a></code>:  <div style="display:inline-block;" data-radium="true">How long the query should run
</div></li></div><div data-radium="true"><li style="padding-bottom:13px;" data-radium="true"><code>callback: function (<a href="https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Error">Error</a>, Result&#x3C;<a href="https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Array">Array</a>>)</code>:  <div style="display:inline-block;" data-radium="true"></div></li></div></ol></div><div data-radium="true"><h4>Returns</h4><div data-radium="true"><code>void</code><span>
</span></div></div></div><div style="margin-bottom:104px;" data-radium="true"><h1 data-radium="true"><a class="anchor" name="findproviders"></a>findProviders<a href="https://github.com/libp2p/js-libp2p/blob/8e95df7f22e90f424f14bc6a2e61c6291484496c/src/content-routing.js#L27-L63" title="src/content-routing.js" style="float:right;" data-radium="true"><svg fill="currentColor" preserveAspectRatio="xMidYMid meet" height="1em" width="1em" viewBox="0 0 40 40" style="vertical-align:middle;"><g><path d="m26.3 7.5l-3.8 3.8 8.8 8.7-8.8 8.8 3.8 3.7 11.2-12.5-11.2-12.5z m-12.5 0l-11.3 12.5 11.3 12.5 3.7-3.7-8.7-8.8 8.7-8.7-3.7-3.8z"></path></g></svg></a></h1><div><p>Iterates over all content routers in series to find providers of the given key.
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Once a content router succeeds, iteration will stop.</p>
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</div><div data-radium="true"><h4>Parameters</h4><ol style="list-style:none;margin-left:0;padding-left:0;" data-radium="true"><div data-radium="true"><li style="padding-bottom:13px;" data-radium="true"><code>key: CID</code>:  <div style="display:inline-block;" data-radium="true">The CID key of the content to find
</div></li></div><div data-radium="true"><li style="padding-bottom:13px;" data-radium="true"><code>options: <a href="https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object">object</a></code>:  <div style="display:inline-block;" data-radium="true"></div></li><li style="padding-bottom:13px;" data-radium="true"><code>options.maxTimeout: <a href="https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Number">number</a></code>:  <div style="display:inline-block;" data-radium="true">How long the query should run
</div></li><li style="padding-bottom:13px;" data-radium="true"><code>options.maxNumProviders: <a href="https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Number">number</a></code>:  <div style="display:inline-block;" data-radium="true">maximum number of providers to find
</div></li></div><div data-radium="true"><li style="padding-bottom:13px;" data-radium="true"><code>callback: function (<a href="https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Error">Error</a>, Result&#x3C;<a href="https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Array">Array</a>>)</code>:  <div style="display:inline-block;" data-radium="true"></div></li></div></ol></div><div data-radium="true"><h4>Returns</h4><div data-radium="true"><code>void</code><span>
</span></div></div></div><div style="margin-bottom:104px;" data-radium="true"><h1 data-radium="true"><a class="anchor" name="provide"></a>provide<a href="https://github.com/libp2p/js-libp2p/blob/8e95df7f22e90f424f14bc6a2e61c6291484496c/src/content-routing.js#L73-L81" title="src/content-routing.js" style="float:right;" data-radium="true"><svg fill="currentColor" preserveAspectRatio="xMidYMid meet" height="1em" width="1em" viewBox="0 0 40 40" style="vertical-align:middle;"><g><path d="m26.3 7.5l-3.8 3.8 8.8 8.7-8.8 8.8 3.8 3.7 11.2-12.5-11.2-12.5z m-12.5 0l-11.3 12.5 11.3 12.5 3.7-3.7-8.7-8.8 8.7-8.7-3.7-3.8z"></path></g></svg></a></h1><div><p>Iterates over all content routers in parallel to notify it is
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a provider of the given key.</p>
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</div><div data-radium="true"><h4>Parameters</h4><ol style="list-style:none;margin-left:0;padding-left:0;" data-radium="true"><div data-radium="true"><li style="padding-bottom:13px;" data-radium="true"><code>key: CID</code>:  <div style="display:inline-block;" data-radium="true">The CID key of the content to find
</div></li></div><div data-radium="true"><li style="padding-bottom:13px;" data-radium="true"><code>callback: function (<a href="https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Error">Error</a>)</code>:  <div style="display:inline-block;" data-radium="true"></div></li></div></ol></div><div data-radium="true"><h4>Returns</h4><div data-radium="true"><code>void</code><span>
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