all outs</code> serializes a list of outputs <code>outs</code></p></dd></dl><dl><dt class="spec value" id="val-is_spendable"><a href="#val-is_spendable" class="anchor"></a><code><span class="keyword">val</span> is_spendable : <a href="index.html#type-t">t</a> <span>&#45;&gt;</span> bool</code></dt><dd><p><code>is_spendable out</code> returns true if the <code>out</code> is spendable by a known template</p></dd></dl><dl><dt class="spec value" id="val-spendable_by"><a href="#val-spendable_by" class="anchor"><