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BloomFilter: provide transactions to a created FilteredBlock

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This commit is contained in:
Mike Hearn 2014-09-21 17:54:24 +02:00
parent 8af5aa0c6c
commit ecec739438
1 changed files with 13 additions and 4 deletions
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17
core/src/main/java/com/google/bitcoin/core/BloomFilter.java
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@ -19,6 +19,7 @@ package com.google.bitcoin.core;
import com.google.bitcoin.script.Script;
import com.google.bitcoin.script.ScriptChunk;
import com.google.common.base.Objects;
import com.google.common.collect.Lists;
import java.io.IOException;
import java.io.OutputStream;
@ -297,19 +298,27 @@ public class BloomFilter extends Message {
/**
* Creates a new FilteredBlock from the given Block, using this filter to select transactions. Matches can cause the
* filter to be updated with the matched element, this ensures that when a filter is applied to a block, spends of
* matched transactions are also matched. However it means this filter can be mutated by the operation.
* matched transactions are also matched. However it means this filter can be mutated by the operation. The returned
* filtered block already has the matched transactions associated with it.
*/
public synchronized FilteredBlock applyAndUpdate(Block block) {
List<Transaction> txns = block.getTransactions();
List<Sha256Hash> txHashes = new ArrayList<Sha256Hash>(txns.size());
List<Transaction> matched = Lists.newArrayList();
byte[] bits = new byte[(int) Math.ceil(txns.size() / 8.0)];
for (int i = 0; i < txns.size(); i++) {
txHashes.add(txns.get(i).getHash());
if (applyAndUpdate(txns.get(i)))
Transaction tx = txns.get(i);
txHashes.add(tx.getHash());
if (applyAndUpdate(tx)) {
Utils.setBitLE(bits, i);
matched.add(tx);
}
}
PartialMerkleTree pmt = PartialMerkleTree.buildFromLeaves(block.getParams(), bits, txHashes);
return new FilteredBlock(block.getParams(), block.cloneAsHeader(), pmt);
FilteredBlock filteredBlock = new FilteredBlock(block.getParams(), block.cloneAsHeader(), pmt);
for (Transaction transaction : matched)
filteredBlock.provideTransaction(transaction);
return filteredBlock;
}
public synchronized boolean applyAndUpdate(Transaction tx) {