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Merge pull request #2215 from rsksmart/update_gasPrice_tracker
Weighted percentile for gasPrice calculation
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51 changes: 51 additions & 0 deletions
51
rskj-core/src/main/java/org/ethereum/listener/GasPriceCalculator.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,51 @@ | ||
| /* | ||
| * This file is part of RskJ | ||
| * Copyright (C) 2024 RSK Labs Ltd. | ||
| * | ||
| * This program is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU Lesser General Public License as published by | ||
| * the Free Software Foundation, either version 3 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU Lesser General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU Lesser General Public License | ||
| * along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
| package org.ethereum.listener; | ||
|
|
||
| import co.rsk.core.Coin; | ||
| import org.ethereum.core.Block; | ||
| import org.ethereum.core.TransactionReceipt; | ||
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| import java.util.List; | ||
| import java.util.Optional; | ||
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| public interface GasPriceCalculator { | ||
| public enum GasCalculatorType { | ||
| PLAIN_PERCENTILE, | ||
| WEIGHTED_PERCENTILE; | ||
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| public static GasCalculatorType fromString(String type) { | ||
| if (type == null) { | ||
| return null; | ||
| } | ||
| switch (type.toLowerCase()) { | ||
| case "weighted_percentile": | ||
| return WEIGHTED_PERCENTILE; | ||
| case "plain_percentile": | ||
| return PLAIN_PERCENTILE; | ||
| default: | ||
| return null; | ||
| } | ||
| } | ||
| } | ||
|
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| Optional<Coin> getGasPrice(); | ||
| void onBlock(Block block, List<TransactionReceipt> receipts); | ||
|
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| GasCalculatorType getType(); | ||
| } |
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78 changes: 78 additions & 0 deletions
78
rskj-core/src/main/java/org/ethereum/listener/PercentileGasPriceCalculator.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,78 @@ | ||
| /* | ||
| * This file is part of RskJ | ||
| * Copyright (C) 2024 RSK Labs Ltd. | ||
| * (derived from ethereumJ library, Copyright (c) 2016 <ether.camp>) | ||
| * | ||
| * This program is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU Lesser General Public License as published by | ||
| * the Free Software Foundation, either version 3 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU Lesser General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU Lesser General Public License | ||
| * along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
| package org.ethereum.listener; | ||
|
|
||
| import co.rsk.core.Coin; | ||
| import co.rsk.remasc.RemascTransaction; | ||
| import org.ethereum.core.Block; | ||
| import org.ethereum.core.Transaction; | ||
| import org.ethereum.core.TransactionReceipt; | ||
|
|
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| import java.util.Arrays; | ||
| import java.util.List; | ||
| import java.util.Optional; | ||
|
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| public class PercentileGasPriceCalculator implements GasPriceCalculator { | ||
| private static final int TX_WINDOW_SIZE = 512; | ||
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| private final Coin[] txWindow = new Coin[TX_WINDOW_SIZE]; | ||
| private int txIdx = TX_WINDOW_SIZE - 1; | ||
| private Coin lastVal; | ||
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| @Override | ||
| public synchronized Optional<Coin> getGasPrice() { | ||
| if (txWindow[0] == null) { // for some reason, not filled yet (i.e. not enough blocks on DB) | ||
| return Optional.empty(); | ||
| } else { | ||
| if (lastVal == null) { | ||
| Coin[] values = Arrays.copyOf(txWindow, TX_WINDOW_SIZE); | ||
| Arrays.sort(values); | ||
| lastVal = values[values.length / 4]; // 25% percentile | ||
| } | ||
| return Optional.of(lastVal); | ||
| } | ||
| } | ||
|
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| @Override | ||
| public synchronized void onBlock(Block block, List<TransactionReceipt> receipts) { | ||
| onBlock(block.getTransactionsList()); | ||
| } | ||
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| @Override | ||
| public GasCalculatorType getType() { | ||
| return GasCalculatorType.PLAIN_PERCENTILE; | ||
| } | ||
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| private void onBlock(List<Transaction> transactionList) { | ||
| for (Transaction tx : transactionList) { | ||
| if (!(tx instanceof RemascTransaction)) { | ||
| trackGasPrice(tx); | ||
| } | ||
| } | ||
| } | ||
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| private void trackGasPrice(Transaction tx) { | ||
| if (txIdx == -1) { | ||
| txIdx = TX_WINDOW_SIZE - 1; | ||
| lastVal = null; // recalculate only 'sometimes' | ||
| } | ||
| txWindow[txIdx--] = tx.getGasPrice(); | ||
| } | ||
|
|
||
| } |
50 changes: 50 additions & 0 deletions
50
rskj-core/src/main/java/org/ethereum/listener/WeightedPercentileCalc.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,50 @@ | ||
| /* | ||
| * This file is part of RskJ | ||
| * Copyright (C) 2024 RSK Labs Ltd. | ||
| * (derived from ethereumJ library, Copyright (c) 2016 <ether.camp>) | ||
| * | ||
| * This program is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU Lesser General Public License as published by | ||
| * the Free Software Foundation, either version 3 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU Lesser General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU Lesser General Public License | ||
| * along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
| package org.ethereum.listener; | ||
|
|
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| import co.rsk.core.Coin; | ||
|
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| import java.util.Collections; | ||
| import java.util.List; | ||
|
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| class WeightedPercentileCalc { | ||
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| Coin calculateWeightedPercentile(float percentile, List<WeightedPercentileGasPriceCalculator.GasEntry> gasEntries) { | ||
| if (gasEntries == null || gasEntries.isEmpty()) { | ||
| return null; | ||
| } | ||
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| Collections.sort(gasEntries); | ||
|
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| double totalWeight = gasEntries.stream().mapToLong(WeightedPercentileGasPriceCalculator.GasEntry::getGasUsed).sum(); | ||
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| double targetWeight = percentile / 100 * totalWeight; | ||
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| double cumulativeWeight = 0; | ||
| for (WeightedPercentileGasPriceCalculator.GasEntry pair : gasEntries) { | ||
| cumulativeWeight += pair.getGasUsed(); | ||
| if (cumulativeWeight >= targetWeight) { | ||
| return pair.getGasPrice(); | ||
| } | ||
| } | ||
|
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| return null; | ||
| } | ||
| } |
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