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<h1 id="running-a-node"><a class="header" href="#running-a-node">Running a Node</a></h1>
<p>The <code>tesseras-daemon</code> binary runs a full Tesseras node that participates in the peer-to-peer network. It listens for connections over QUIC, joins the distributed hash table (DHT), and enables other nodes to discover and find tessera pointers.</p>
<h2 id="starting-the-daemon"><a class="header" href="#starting-the-daemon">Starting the daemon</a></h2>
<pre><code class="language-bash">tesseras-daemon
</code></pre>
<p>On first run, the daemon:</p>
<ol>
<li>Creates the data directory (<code>~/.local/share/tesseras</code> on Linux, <code>~/Library/Application Support/tesseras</code> on macOS)</li>
<li>Generates a node identity with proof-of-work (takes about 1 second)</li>
<li>Binds a QUIC listener on <code>0.0.0.0:4433</code></li>
<li>Bootstraps into the network by contacting seed nodes</li>
<li>Prints <code>daemon ready</code> when fully operational</li>
</ol>
<h2 id="command-line-options"><a class="header" href="#command-line-options">Command-line options</a></h2>
<pre><code>tesseras-daemon [OPTIONS]
</code></pre>
<div class="table-wrapper">
<table>
<thead>
<tr><th>Option</th><th>Description</th><th>Default</th></tr>
</thead>
<tbody>
<tr><td><code>-c, --config <PATH></code></td><td>Path to a TOML config file</td><td>None (uses built-in defaults)</td></tr>
<tr><td><code>-l, --listen <ADDR></code></td><td>Address and port to listen on</td><td><code>0.0.0.0:4433</code></td></tr>
<tr><td><code>-b, --bootstrap <ADDRS></code></td><td>Comma-separated bootstrap addresses</td><td><code>boot1.tesseras.net:4433,boot2.tesseras.net:4433</code></td></tr>
<tr><td><code>-d, --data-dir <PATH></code></td><td>Data directory</td><td>Platform-specific (see above)</td></tr>
</tbody>
</table>
</div>
<p>CLI options override values from the config file.</p>
<h2 id="examples"><a class="header" href="#examples">Examples</a></h2>
<p>Run with defaults (join the public network):</p>
<pre><code class="language-bash">tesseras-daemon
</code></pre>
<p>Run as a seed node (no bootstrap, other nodes connect to you):</p>
<pre><code class="language-bash">tesseras-daemon --bootstrap ""
</code></pre>
<p>Run on a custom port with a specific data directory:</p>
<pre><code class="language-bash">tesseras-daemon --listen 0.0.0.0:5000 --data-dir /var/lib/tesseras
</code></pre>
<p>Bootstrap from a specific node:</p>
<pre><code class="language-bash">tesseras-daemon --bootstrap "192.168.1.50:4433"
</code></pre>
<p>Join a local network of multiple nodes:</p>
<pre><code class="language-bash">tesseras-daemon --bootstrap "192.168.1.10:4433,192.168.1.11:4433"
</code></pre>
<h2 id="node-identity"><a class="header" href="#node-identity">Node identity</a></h2>
<p>Each node has a unique identity stored in <code><data-dir>/identity.key</code>. This file contains a 32-byte public key and an 8-byte proof-of-work nonce.</p>
<p>The node ID is derived from the public key: <code>BLAKE3(pubkey || nonce)</code> truncated to 20 bytes. The nonce must produce a hash with 8 leading zero bits, which takes about 256 hash attempts. This lightweight proof-of-work makes creating thousands of fake identities expensive while costing legitimate users less than a second.</p>
<p>The identity is generated automatically on first run and reused on subsequent runs. If you delete <code>identity.key</code>, a new identity will be generated.</p>
<h2 id="logging"><a class="header" href="#logging">Logging</a></h2>
<p>The daemon uses structured logging via <code>tracing</code>. Control the log level with the <code>RUST_LOG</code> environment variable:</p>
<pre><code class="language-bash"># Default (info level)
tesseras-daemon
# Debug logging
RUST_LOG=debug tesseras-daemon
# Only show warnings and errors
RUST_LOG=warn tesseras-daemon
# Debug for DHT, info for everything else
RUST_LOG=info,tesseras_dht=debug tesseras-daemon
</code></pre>
<h2 id="shutting-down"><a class="header" href="#shutting-down">Shutting down</a></h2>
<p>Press <strong>Ctrl+C</strong> to initiate graceful shutdown. The daemon will:</p>
<ol>
<li>Stop accepting new connections</li>
<li>Finish in-flight operations (up to 5 seconds)</li>
<li>Close all QUIC connections</li>
<li>Exit cleanly</li>
</ol>
<h2 id="firewall"><a class="header" href="#firewall">Firewall</a></h2>
<p>The daemon communicates over UDP port 4433 (QUIC). If you’re behind a firewall, ensure this port is open for both inbound and outbound UDP traffic.</p>
<pre><code class="language-bash"># Example: Linux with ufw
sudo ufw allow 4433/udp
</code></pre>
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