public StoredTransactionOutput getTransactionOutput(Sha256Hash hash, long index)
throws BlockStoreException {
maybeConnect();
PreparedStatement s = null;
try {
s =
conn.get()
.prepareStatement(
"SELECT height, value, scriptBytes FROM openOutputs "
+ "WHERE hash = ? AND index = ?");
s.setBytes(1, hash.getBytes());
// index is actually an unsigned int
s.setInt(2, (int) index);
ResultSet results = s.executeQuery();
if (!results.next()) {
return null;
}
// Parse it.
int height = results.getInt(1);
BigInteger value = new BigInteger(results.getBytes(2));
// Tell the StoredTransactionOutput that we are a coinbase, as that is encoded in height
StoredTransactionOutput txout =
new StoredTransactionOutput(hash, index, value, height, true, results.getBytes(3));
return txout;
} catch (SQLException ex) {
throw new BlockStoreException(ex);
} finally {
if (s != null)
try {
s.close();
} catch (SQLException e) {
throw new BlockStoreException("Failed to close PreparedStatement");
}
}
}
private void initFromDatabase() throws SQLException, BlockStoreException {
Statement s = conn.get().createStatement();
ResultSet rs;
rs = s.executeQuery("SELECT value FROM settings WHERE name = '" + CHAIN_HEAD_SETTING + "'");
if (!rs.next()) {
throw new BlockStoreException("corrupt Postgres block store - no chain head pointer");
}
Sha256Hash hash = new Sha256Hash(rs.getBytes(1));
rs.close();
this.chainHeadBlock = get(hash);
this.chainHeadHash = hash;
if (this.chainHeadBlock == null) {
throw new BlockStoreException("corrupt Postgres block store - head block not found");
}
rs =
s.executeQuery(
"SELECT value FROM settings WHERE name = '" + VERIFIED_CHAIN_HEAD_SETTING + "'");
if (!rs.next()) {
throw new BlockStoreException(
"corrupt Postgres block store - no verified chain head pointer");
}
hash = new Sha256Hash(rs.getBytes(1));
rs.close();
s.close();
this.verifiedChainHeadBlock = get(hash);
this.verifiedChainHeadHash = hash;
if (this.verifiedChainHeadBlock == null) {
throw new BlockStoreException("corrupt Postgres block store - verified head block not found");
}
}
public StoredBlock get(Sha256Hash hash, boolean wasUndoableOnly) throws BlockStoreException {
// Optimize for chain head
if (chainHeadHash != null && chainHeadHash.equals(hash)) return chainHeadBlock;
if (verifiedChainHeadHash != null && verifiedChainHeadHash.equals(hash))
return verifiedChainHeadBlock;
maybeConnect();
PreparedStatement s = null;
try {
s =
conn.get()
.prepareStatement(
"SELECT chainWork, height, header, wasUndoable FROM headers WHERE hash = ?");
// We skip the first 4 bytes because (on prodnet) the minimum target has 4 0-bytes
byte[] hashBytes = new byte[28];
System.arraycopy(hash.getBytes(), 3, hashBytes, 0, 28);
s.setBytes(1, hashBytes);
ResultSet results = s.executeQuery();
if (!results.next()) {
return null;
}
// Parse it.
if (wasUndoableOnly && !results.getBoolean(4)) return null;
BigInteger chainWork = new BigInteger(results.getBytes(1));
int height = results.getInt(2);
Block b = new Block(params, results.getBytes(3));
b.verifyHeader();
StoredBlock stored = new StoredBlock(b, chainWork, height);
return stored;
} catch (SQLException ex) {
throw new BlockStoreException(ex);
} catch (ProtocolException e) {
// Corrupted database.
throw new BlockStoreException(e);
} catch (VerificationException e) {
// Should not be able to happen unless the database contains bad
// blocks.
throw new BlockStoreException(e);
} finally {
if (s != null)
try {
s.close();
} catch (SQLException e) {
throw new BlockStoreException("Failed to close PreparedStatement");
}
}
}
public StoredUndoableBlock getUndoBlock(Sha256Hash hash) throws BlockStoreException {
maybeConnect();
PreparedStatement s = null;
try {
s =
conn.get()
.prepareStatement(
"SELECT txOutChanges, transactions FROM undoableBlocks WHERE hash = ?");
// We skip the first 4 bytes because (on prodnet) the minimum target has 4 0-bytes
byte[] hashBytes = new byte[28];
System.arraycopy(hash.getBytes(), 3, hashBytes, 0, 28);
s.setBytes(1, hashBytes);
ResultSet results = s.executeQuery();
if (!results.next()) {
return null;
}
// Parse it.
byte[] txOutChanges = results.getBytes(1);
byte[] transactions = results.getBytes(2);
StoredUndoableBlock block;
if (txOutChanges == null) {
int offset = 0;
int numTxn =
((transactions[offset++] & 0xFF) << 0)
| ((transactions[offset++] & 0xFF) << 8)
| ((transactions[offset++] & 0xFF) << 16)
| ((transactions[offset++] & 0xFF) << 24);
List<Transaction> transactionList = new LinkedList<Transaction>();
for (int i = 0; i < numTxn; i++) {
Transaction tx = new Transaction(params, transactions, offset);
transactionList.add(tx);
offset += tx.getMessageSize();
}
block = new StoredUndoableBlock(hash, transactionList);
} else {
TransactionOutputChanges outChangesObject =
new TransactionOutputChanges(new ByteArrayInputStream(txOutChanges));
block = new StoredUndoableBlock(hash, outChangesObject);
}
return block;
} catch (SQLException ex) {
throw new BlockStoreException(ex);
} catch (NullPointerException e) {
// Corrupted database.
throw new BlockStoreException(e);
} catch (ClassCastException e) {
// Corrupted database.
throw new BlockStoreException(e);
} catch (ProtocolException e) {
// Corrupted database.
throw new BlockStoreException(e);
} catch (IOException e) {
// Corrupted database.
throw new BlockStoreException(e);
} finally {
if (s != null)
try {
s.close();
} catch (SQLException e) {
throw new BlockStoreException("Failed to close PreparedStatement");
}
}
}
/**
* Dumps information about the size of actual data in the database to standard output The only
* truly useless data counted is printed in the form "N in id indexes" This does not take database
* indexes into account
*/
public void dumpSizes() throws SQLException, BlockStoreException {
maybeConnect();
Statement s = conn.get().createStatement();
long size = 0;
long totalSize = 0;
int count = 0;
ResultSet rs = s.executeQuery("SELECT name, value FROM settings");
while (rs.next()) {
size += rs.getString(1).length();
size += rs.getBytes(2).length;
count++;
}
rs.close();
System.out.printf(
"Settings size: %d, count: %d, average size: %f%n", size, count, (double) size / count);
totalSize += size;
size = 0;
count = 0;
rs = s.executeQuery("SELECT chainWork, header FROM headers");
while (rs.next()) {
size += 28; // hash
size += rs.getBytes(1).length;
size += 4; // height
size += rs.getBytes(2).length;
count++;
}
rs.close();
System.out.printf(
"Headers size: %d, count: %d, average size: %f%n", size, count, (double) size / count);
totalSize += size;
size = 0;
count = 0;
rs = s.executeQuery("SELECT txOutChanges, transactions FROM undoableBlocks");
while (rs.next()) {
size += 28; // hash
size += 4; // height
byte[] txOutChanges = rs.getBytes(1);
byte[] transactions = rs.getBytes(2);
if (txOutChanges == null) size += transactions.length;
else size += txOutChanges.length;
// size += the space to represent NULL
count++;
}
rs.close();
System.out.printf(
"Undoable Blocks size: %d, count: %d, average size: %f%n",
size, count, (double) size / count);
totalSize += size;
size = 0;
count = 0;
long scriptSize = 0;
rs = s.executeQuery("SELECT value, scriptBytes FROM openOutputs");
while (rs.next()) {
size += 32; // hash
size += 4; // index
size += 4; // height
size += rs.getBytes(1).length;
size += rs.getBytes(2).length;
scriptSize += rs.getBytes(2).length;
count++;
}
rs.close();
System.out.printf(
"Open Outputs size: %d, count: %d, average size: %f, average script size: %f (%d in id indexes)%n",
size, count, (double) size / count, (double) scriptSize / count, count * 8);
totalSize += size;
System.out.println("Total Size: " + totalSize);
s.close();
}
