Condicional lógica para template de e-mail - texto diferente no botão de acordo com o método de pagamento

whmcs_e-mail_template_if_payment_method.txt

{if $invoice_payment_method eq "Boleto Bancário"}
  <br />
    <a class="paybuttom" href="{$whmcs_url}auth.php?email={$client_email}&amp;userid={$client_id}&amp;firstname={$client_first_name}&amp;lastname={$client_last_name}&amp;hash={$hash}&amp;whmcsurl={$whmcs_url}&amp;goto=viewinvoice.php?id={$invoice_id}">Visualizar Boleto</a>
  <br />
{else}
  <br />
    <a class="paybuttom" href="{$whmcs_url}auth.php?email={$client_email}&amp;userid={$client_id}&amp;firstname={$client_first_name}&amp;lastname={$client_last_name}&amp;hash={$hash}&amp;whmcsurl={$whmcs_url}&amp;goto=viewinvoice.php?id={$invoice_id}">Visualizar Fatura</a>
   <br />
{/if}