private function _verifyGatewayResponse($response)
{
if (isset($response['response']['merchant'])) {
// return a populated instance of merchant
return new Result\Successful([Merchant::factory($response['response']['merchant']), OAuthCredentials::factory($response['response']['credentials'])]);
} else {
if (isset($response['apiErrorResponse'])) {
return new Result\Error($response['apiErrorResponse']);
} else {
throw new Exception\Unexpected("Expected merchant or apiErrorResponse");
}
}
}
