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randomize completed trade info, fixes #1099

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fa2a5qj3 2024-07-16 16:08:55 -04:00 committed by GitHub
parent 40421eec75
commit 0a469db8f6
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1 changed files with 23 additions and 2 deletions
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core/src/main/java/haveno/core/trade/statistics/TradeStatistics3.java
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@ -54,6 +54,8 @@ import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.Optional;
import java.util.concurrent.TimeUnit;
import java.util.Random;
import static com.google.common.base.Preconditions.checkNotNull;
@ -88,13 +90,32 @@ public final class TradeStatistics3 implements ProcessOncePersistableNetworkPayl
Offer offer = checkNotNull(trade.getOffer());
return new TradeStatistics3(offer.getCurrencyCode(),
trade.getPrice().getValue(),
trade.getAmount().longValueExact(),
fuzzTradeAmountReproducibly(trade),
offer.getPaymentMethod().getId(),
trade.getTakeOfferDate().getTime(),
fuzzTradeDateReproducibly(trade),
truncatedArbitratorNodeAddress,
extraDataMap);
}
private static long fuzzTradeAmountReproducibly(Trade trade) { // randomize completed trade info #1099
long originalTimestamp = trade.getTakeOfferDate().getTime();
long exactAmount = trade.getAmount().longValueExact();
Random random = new Random(originalTimestamp); // pseudo random generator seeded from take offer datestamp
long adjustedAmount = (long) random.nextDouble(
exactAmount * 0.95, exactAmount * 1.05);
log.debug("trade {} fuzzed trade amount for tradeStatistics is {}", trade.getShortId(), adjustedAmount);
return adjustedAmount;
}
private static long fuzzTradeDateReproducibly(Trade trade) { // randomize completed trade info #1099
long originalTimestamp = trade.getTakeOfferDate().getTime();
Random random = new Random(originalTimestamp); // pseudo random generator seeded from take offer datestamp
long adjustedTimestamp = random.nextLong(
originalTimestamp-TimeUnit.HOURS.toMillis(24), originalTimestamp);
log.debug("trade {} fuzzed trade datestamp for tradeStatistics is {}", trade.getShortId(), new Date(adjustedTimestamp));
return adjustedTimestamp;
}
// This enum must not change the order as we use the ordinal for storage to reduce data size.
// The payment method string can be quite long and would consume 15% more space.
// When we get a new payment method we can add it to the enum at the end. Old users would add it as string if not