public function deleteContract($invoiceID, $productSID, $userSID) { $contractID = SJB_ContractManager::getContractIDByInvoiceID($invoiceID, $productSID, $userSID); if ($contractID) { SJB_ContractManager::deleteContract($contractID, $userSID); SJB_Statistics::deleteStatistics('payment', 'product', $this->product['sid'], $userSID, $this->product['amount']); } }