Change the type of the 'difficulty' field in the Filter & ProofOfWork
proto objects from int32/bytes to double and make it use a linear scale,
in place of the original logarithmic scale which counts the (effective)
number of required zeros.
This allows fine-grained difficulty control for Equihash, though for
Hashcash it simply rounds up to the nearest power of 2 internally.
NOTE: This is a breaking change to PoW & filter serialisation (unlike
the earlier PR commits), as the proto field version nums aren't updated.
Add a numeric version field to the 'ProofOfWork' protobuf object, along
with a list of allowed version numbers, 'enabled_pow_versions', to the
filter. The versions are taken to be in order of preference from most to
least preferred when creating a PoW, with an empty list signifying use
of the default algorithm only (that is, version 0: Hashcash).
An explicit list is used instead of an upper & lower version bound, in
case a new PoW algorithm (or changed algorithm params) turns out to
provide worse resistance than an earlier version.
(The fields are unused for now, to be enabled in a later commit.)
in parallel and once both are done we call asyncUpdateChartData (not yet refactored).
Clear all data at deactivate
This cause a bit of costs when we activate again but as we delegate
now all work to threads it should be OK. It decreases the memory usage
if we do not keep those data in the fields. The View classes are cached
in the view loader so all data in fields stays in memory once it was
activated once and not manually cleared in deactivate.
Move getTradeStatisticsForCurrency to ChartCalculations
Rename buildUsdPricesPerTickUnit to getUsdAveragePriceMapsPerTickUnit
Rename selectedTradeStatistics to tradeStatisticsByCurrency
Make itemsPerInterval final
Remove modelReady
Add deactivateCalled flag
The creation of TradeStatistics3ListItem is rather fast but the
applying to the list is due sorting pretty slow (300 ms) as
its > 100k items. We do the applying on the callback thread.
Seems JavaFx permits that. So we can keep the UI thread unblocked.
Remove modelReadyListener
Renamed model.selectedTradeStatistics to model.tradeStatisticsByCurrency
Make buildUsdPricesPerTickUnit static and pass params
Rename usdPriceMapsPerTickUnit to usdAveragePriceMapsPerTickUnit
Rename local variable map to usdAveragePriceMap
Move method calls syncPriceFeedCurrency() and
setMarketPriceFeedCurrency() before other calls (those will become async later)
