Código para desconto por boleto no pagseguro.

<br />
/**<br />
* Filtro para adicionar desconto de X% no boleto<br />
*/<br />
add_filter( 'woocommerce_pagseguro_payment_xml', 'sc50k_desconto_boleto', 20, 2 );<br />
add_filter( 'woocommerce_pagseguro_checkout_xml', 'sc50k_desconto_boleto', 20, 2 );<br />
function sc50k_desconto_boleto($xml, $order){<br />
if ( $xml-&gt;method == 'boleto' ){<br />
$desconto = 5; // Depois dá para colocar dinâmico no admin via get_option()</p>
<p>$total = $order-&gt;get_total();<br />
$discount = number_format( $total * ( $desconto / 100 ), 2, '.', ',' );<br />
$xml-&gt;add_extra_amount( '-'.$discount );</p>
<p>$current_order_discount = $order-&gt;get_discount_total();<br />
$order-&gt;set_discount_total( $current_order_discount + $discount );</p>
<p>$current_order_total = $order-&gt;get_total();<br />
$order-&gt;set_total( $current_order_total - $discount );</p>
<p>$order-&gt;save();<br />
}</p>
<p>return $xml;<br />
}<br />