public function exec($assetTypeId)
    {
        /* get the last date with balances for given asset then take previous date */
        $dsLast = $this->getDateBalanceClose($assetTypeId);
        $dsPrev = $this->hlpPeriod->getPeriodPrev($dsLast);
        /* get all closing balances for previous date */
        $balances = $this->getBalances($assetTypeId, $dsPrev);
        /* get all accounts with given asset type */
        $accounts = $this->getAccounts($assetTypeId);
        /* get all transactions starting from "balance close -1 day" for given asset */
        $trans = $this->getTransactions($assetTypeId, $dsPrev);
        /* then validate current balances */
        $this->validate($accounts, $balances, $trans);
    }