Retrieving Chargeback Updates

 $cb = new Chargeback();
 $page = 0;
 $pageSize = 50;
  
 // Here we want to fetch chargebacks that have changed in status or 
 // have been added since the last time we ran this call. 
 // Assume we have a function available to us that gives us 
 // the timestamp for the last time we ran this call
  
 $since = getLastCallTime(); 
 do {
 $ret = $cb->fetchDeltaSince($since, null, $page, $pageSize);
 $count = 0;
 if ($ret[’returnCode’] == 200) {
 $fetchedChargebacks = $ret['chargebacks'];
 if ($fetchedChargebacks != null) {
 $count = sizeof($fetchedChargebacks);
 foreach ($fetchedChargebacks as $chargeback) {
  
 // process a fetched chargeback here …
 $status = $chargeback->getStatus();
 $transactionId = 
 $chargeback->getMerchantTransactionId();
 $amount = $chargeback->getAmount();
 }
 $page++;
 }
 }
 } while ($count > 0);