function setPremium(int newBuyPremium, int newSellPremium, uint newEthBaseQty) public onlyAdmin {
        require(newBuyPremium >= -10000);
        require(newBuyPremium <= int(MAX_QTY));

        require(newSellPremium >= -10000);
        require(newSellPremium <= int(MAX_QTY));

        sellPremiumInBps = newSellPremium;
        buyPremiumInBps = newBuyPremium;
        baseEthQty = newEthBaseQty;
    }