protected function createDadosEc(Transaction $transaction, DOMDocument $document)
{
$merchant = $transaction->getMerchant();
$dadosEc = $document->createElementNS(TransactionRequestSerializer::NS, 'dados-ec');
$numero = $document->createElementNS(TransactionRequestSerializer::NS, 'numero', $merchant->getAffiliationId());
$chave = $document->createElementNS(TransactionRequestSerializer::NS, 'chave', $merchant->getAffiliationKey());
$dadosEc->appendChild($numero);
$dadosEc->appendChild($chave);
return $dadosEc;
}