protected function gateway()
{
$gateway = parent::gateway();
if ($gateway->getSandbox() && isset($_ENV['DWOLLA_SANDBOX_KEY']) && isset($_ENV['DWOLLA_SANSBOX_SECRET'])) {
$gateway->setKey($_ENV['DWOLLA_SANDBOX_KEY']);
$gateway->setSecret($_ENV['DWOLLA_SANSBOX_SECRET']);
} elseif (isset($_ENV['DWOLLA_KEY']) && isset($_ENV['DWOLLA_SECRET'])) {
$gateway->setKey($_ENV['DWOLLA_KEY']);
$gateway->setSecret($_ENV['DWOLLA_SECRET']);
}
return $gateway;
}