sed on mainnet is <code class="highlighter-rouge">STM</code> and on testnet is <code class="highlighter-rouge">TST</code>.  See: <a href="/quickstart/#quickstart-testnet">Steem Testnet</a></p>

<h3 id="steem_block_interval"><code class="highlighter-rouge">STEEM_BLOCK_INTERVAL</code><a style="float: right" href="#sections"><i class="fas fa-chevron-up fa-sm"></i></a></h3>

<p>Block interval in seconds is <code class="highlighter-rouge">3</code>.  This is the target for block production.  This constant is also