s of second since UNIX epoch.</p></li>
</ul><div class="sourceCode"><pre><code><span></span>
<span><span class="va">HOTP</span><span class="op">$</span><span class="fu">verify</span><span class="op">(</span><span class="va">code</span>, <span class="va">t</span>, behind <span class="op">=</span> <span class="fl">0L</span><span class="op">)</span></span></code></pre></div><p>Verify if a given one time password is valid. Returns the beginning time of the time
step window if there is a match within the <code>b