Description
When opening a LIMIT or STOP order, the first empty index is calculated using OstiumTradingStorage::firstEmptyOpenLimitIndex() on L209.
However, the same function is executed again in OstiumTradingStorage::storeOpenLimitOrder() on L233, which results in the index property being overridden with the same value.
Similarly, the current block number is retrieved on L211 in OstiumTrading, and then on L231 in OstiumTradingStorage.
Recommendation
Remove the redundant overriding of these variables from OstiumTradingStorage::storeOpenLimitOrder().
Status
Addressed in #3d116cd.