public function apiRequest($method, $vars)
{
$req = new Am_HttpRequest(self::API_URL . "/" . $method . ".html", Am_HttpRequest::METHOD_POST);
$req->addPostParameter('merchantid', $this->getConfig('merchant_id'));
$req->addPostParameter('signature', $this->getConfig('api_signature'));
foreach ($vars as $k => $v) {
$req->addPostParameter($k, $v);
}
$req->send();
$resp = $req->getBody();
if (!$resp) {
throw new Am_Exception_InputError('PWC: got empty response from API server');
}
$xml = simplexml_load_string($resp);
if ($xml->error) {
throw new Am_Exception_InputError('PWC: Got error from API: ' . $xml->error->errortext);
}
return $xml;
}
