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Namecoin LevelDBTransactionCache: Only store name scriptPubKey in the record, not entire transaction. (#32)

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This breaks backward compatibility with older name databases.  You'll need to delete the blockchain and resync.
This commit is contained in:
JeremyRand 2018-03-18 08:59:42 +00:00 committed by Ross Nicoll
parent 6ce57fdb04
commit 31fb8985ba
1 changed files with 17 additions and 9 deletions
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26
namecoin/src/main/java/org/libdohj/names/NameLookupLatestLevelDBTransactionCache.java
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@ -22,6 +22,7 @@ import org.libdohj.script.NameScript;
import org.bitcoinj.core.AbstractBlockChain; import org.bitcoinj.core.AbstractBlockChain;
import org.bitcoinj.core.Block; import org.bitcoinj.core.Block;
import org.bitcoinj.core.BlockChain; import org.bitcoinj.core.BlockChain;
import org.bitcoinj.core.Coin;
import org.bitcoinj.core.Context; import org.bitcoinj.core.Context;
import org.bitcoinj.core.NetworkParameters; import org.bitcoinj.core.NetworkParameters;
import org.bitcoinj.core.PeerGroup; import org.bitcoinj.core.PeerGroup;
@ -51,6 +52,7 @@ import com.google.common.collect.SetMultimap;
import java.io.*; import java.io.*;
import java.nio.*; import java.nio.*;
import java.util.Arrays;
import java.util.Date; import java.util.Date;
import java.util.EnumSet; import java.util.EnumSet;
import java.util.List; import java.util.List;
@ -205,7 +207,7 @@ public class NameLookupLatestLevelDBTransactionCache implements NameLookupLatest
Script scriptPubKey = output.getScriptPubKey(); Script scriptPubKey = output.getScriptPubKey();
NameScript ns = new NameScript(scriptPubKey); NameScript ns = new NameScript(scriptPubKey);
if(ns.isNameOp() && ns.isAnyUpdate() ) { if(ns.isNameOp() && ns.isAnyUpdate() ) {
putNameTransaction(ns.getOpName().data, tx, height); putNameScript(scriptPubKey, ns, height);
} }
} catch (ScriptException e) { } catch (ScriptException e) {
continue; continue;
@ -219,21 +221,23 @@ public class NameLookupLatestLevelDBTransactionCache implements NameLookupLatest
setChainHead(block.getHeight()); setChainHead(block.getHeight());
} }
protected synchronized void putNameTransaction(final byte[] nameBytes, Transaction tx, int height) { protected synchronized void putNameScript(Script scriptPubKey, NameScript ns, int height) throws UnsupportedEncodingException {
// TODO: check if name is relevant (e.g. namespace is id/, has zeronet field) // TODO: check if name is relevant (e.g. namespace is id/, has zeronet field)
byte[] headerBytes = "NameTx".getBytes(); // key format:
// name goes here byte[] headerBytes = "NamScr".getBytes("ISO-8859-1");
byte[] nameBytes = ns.getOpName().data;
// record format:
// height goes here // height goes here
byte[] txBytes = tx.bitcoinSerialize(); byte[] scriptBytes = scriptPubKey.getProgram();
ByteBuffer keyBuffer = ByteBuffer.allocate(headerBytes.length + nameBytes.length); ByteBuffer keyBuffer = ByteBuffer.allocate(headerBytes.length + nameBytes.length);
ByteBuffer recordBuffer = ByteBuffer.allocate(4 + txBytes.length); ByteBuffer recordBuffer = ByteBuffer.allocate(4 + scriptBytes.length);
keyBuffer.put(headerBytes).put(nameBytes); keyBuffer.put(headerBytes).put(nameBytes);
recordBuffer.putInt(height).put(txBytes); recordBuffer.putInt(height).put(scriptBytes);
db.put(keyBuffer.array(), recordBuffer.array()); db.put(keyBuffer.array(), recordBuffer.array());
} }
@ -264,7 +268,7 @@ public class NameLookupLatestLevelDBTransactionCache implements NameLookupLatest
@Override @Override
public Transaction getNameTransaction(String name, String identity) throws Exception { public Transaction getNameTransaction(String name, String identity) throws Exception {
byte[] headerBytes = "NameTx".getBytes("ISO-8859-1"); byte[] headerBytes = "NamScr".getBytes("ISO-8859-1");
byte[] nameBytes = name.getBytes("ISO-8859-1"); byte[] nameBytes = name.getBytes("ISO-8859-1");
// name goes here // name goes here
@ -281,7 +285,11 @@ public class NameLookupLatestLevelDBTransactionCache implements NameLookupLatest
verifyHeightTrustworthy(height); verifyHeightTrustworthy(height);
Transaction tx = new Transaction(params, recordBytes, 4); byte[] scriptPubKeyBytes = Arrays.copyOfRange(recordBytes, 4, recordBytes.length);
Transaction tx = new Transaction(params);
Script scriptPubKey = new Script(scriptPubKeyBytes);
tx.addOutput(Coin.CENT, scriptPubKey);
tx.getConfidence().setAppearedAtChainHeight(height); // TODO: test this line tx.getConfidence().setAppearedAtChainHeight(height); // TODO: test this line
tx.getConfidence().setDepthInBlocks(chain.getChainHead().getHeight() - height + 1); tx.getConfidence().setDepthInBlocks(chain.getChainHead().getHeight() - height + 1);