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Add price deviation in % to BSQ using 30 day average

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chimp1984 2020-12-14 16:43:37 -05:00 • committed by Christoph Atteneder
parent 67fd7ea010
commit dd34bc6810
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1 changed files with 35 additions and 9 deletions
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44
desktop/src/main/java/bisq/desktop/main/offer/offerbook/OfferBookViewModel.java
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@ -48,8 +48,10 @@ import bisq.core.provider.price.MarketPrice;
import bisq.core.provider.price.PriceFeedService;
import bisq.core.trade.Trade;
import bisq.core.trade.closed.ClosedTradableManager;
import bisq.core.trade.statistics.TradeStatisticsManager;
import bisq.core.user.Preferences;
import bisq.core.user.User;
import bisq.core.util.AveragePriceUtil;
import bisq.core.util.FormattingUtils;
import bisq.core.util.coin.BsqFormatter;
import bisq.core.util.coin.CoinFormatter;
@ -61,6 +63,7 @@ import bisq.common.app.Version;
import bisq.common.handlers.ErrorMessageHandler;
import bisq.common.handlers.ResultHandler;
import bisq.common.util.MathUtils;
import bisq.common.util.Tuple2;
import org.bitcoinj.core.Coin;
import org.bitcoinj.utils.Fiat;
@ -109,6 +112,7 @@ class OfferBookViewModel extends ActivatableViewModel {
private final FilterManager filterManager;
final AccountAgeWitnessService accountAgeWitnessService;
private final Navigation navigation;
private final TradeStatisticsManager tradeStatisticsManager;
private final CoinFormatter btcFormatter;
private final BsqFormatter bsqFormatter;
@ -151,6 +155,7 @@ class OfferBookViewModel extends ActivatableViewModel {
FilterManager filterManager,
AccountAgeWitnessService accountAgeWitnessService,
Navigation navigation,
TradeStatisticsManager tradeStatisticsManager,
@Named(FormattingUtils.BTC_FORMATTER_KEY) CoinFormatter btcFormatter,
BsqFormatter bsqFormatter) {
super();
@ -166,6 +171,7 @@ class OfferBookViewModel extends ActivatableViewModel {
this.filterManager = filterManager;
this.accountAgeWitnessService = accountAgeWitnessService;
this.navigation = navigation;
this.tradeStatisticsManager = tradeStatisticsManager;
this.btcFormatter = btcFormatter;
this.bsqFormatter = bsqFormatter;
@ -379,31 +385,51 @@ class OfferBookViewModel extends ActivatableViewModel {
}
if (!hasMarketPrice(offer)) {
log.trace("We don't have a market price. " +
"That case could only happen if you don't have a price feed.");
return Optional.empty();
if (offer.getCurrencyCode().equals("BSQ")) {
Tuple2<Price, Price> tuple = AveragePriceUtil.getAveragePriceTuple(preferences,
tradeStatisticsManager,
30);
Price bsqPrice = tuple.second;
if (bsqPrice.isPositive()) {
long bsqPriceValue = bsqPrice.getValue();
double scaled = MathUtils.scaleDownByPowerOf10(bsqPriceValue, 8);
return calculatePercentage(offer, scaled);
} else {
return Optional.empty();
}
} else {
log.trace("We don't have a market price. " +
"That case could only happen if you don't have a price feed.");
return Optional.empty();
}
}
// If the offer did not use % price we calculate % from current market price
String currencyCode = offer.getCurrencyCode();
checkNotNull(priceFeedService, "priceFeed must not be null");
MarketPrice marketPrice = priceFeedService.getMarketPrice(currencyCode);
double marketPriceAsDouble = checkNotNull(marketPrice).getPrice();
return calculatePercentage(offer, marketPriceAsDouble);
}
protected Optional<Double> calculatePercentage(Offer offer, double marketPrice) {
// If the offer did not use % price we calculate % from current market price
String currencyCode = offer.getCurrencyCode();
Price price = offer.getPrice();
int precision = CurrencyUtil.isCryptoCurrency(currencyCode) ?
Altcoin.SMALLEST_UNIT_EXPONENT :
Fiat.SMALLEST_UNIT_EXPONENT;
long priceAsLong = checkNotNull(price).getValue();
double scaled = MathUtils.scaleDownByPowerOf10(priceAsLong, precision);
double marketPriceAsDouble = checkNotNull(marketPrice).getPrice();
if (direction == OfferPayload.Direction.SELL) {
double value = CurrencyUtil.isFiatCurrency(currencyCode) ?
1 - scaled / marketPriceAsDouble :
scaled / marketPriceAsDouble - 1;
1 - scaled / marketPrice :
scaled / marketPrice - 1;
return Optional.of(value);
} else {
double value = CurrencyUtil.isFiatCurrency(currencyCode) ?
scaled / marketPriceAsDouble - 1 :
1 - scaled / marketPriceAsDouble;
scaled / marketPrice - 1 :
1 - scaled / marketPrice;
return Optional.of(value);
}
}