private void createNewStore(NetworkParameters params, File file) throws BlockStoreException {
// Create a new block store if the file wasn't found or anything went wrong whilst reading.
blockCache.clear();
try {
if (file.exists()) {
if (!file.delete())
throw new BlockStoreException("Could not delete old store in order to recreate it");
}
// Create fresh. The d makes writes synchronous.
this.file = new RandomAccessFile(file, "rwd");
this.channel = this.file.getChannel();
lock();
this.file.write(FILE_FORMAT_VERSION);
} catch (IOException e1) {
// We could not load a block store nor could we create a new one!
throw new BlockStoreException(e1);
}
try {
// Set up the genesis block. When we start out fresh, it is by definition the top of the
// chain.
Block genesis = params.genesisBlock.cloneAsHeader();
StoredBlock storedGenesis = new StoredBlock(genesis, genesis.getWork(), 0);
this.chainHead = storedGenesis.getHeader().getHash();
this.file.write(this.chainHead.getBytes());
put(storedGenesis);
} catch (VerificationException e1) {
throw new RuntimeException(e1); // Cannot happen.
} catch (IOException e) {
throw new BlockStoreException(e);
}
}
/**
* Creates a new StoredBlock, calculating the additional fields by adding to the values in this
* block.
*/
public StoredBlock build(Block block) throws VerificationException {
// Stored blocks track total work done in this chain, because the canonical chain is the one
// that represents
// the largest amount of work done not the tallest.
BigInteger chainWork = this.chainWork.add(block.getWork());
int height = this.height + 1;
return new StoredBlock(block, chainWork, height);
}
private void initNewStore(NetworkParameters params) throws Exception {
byte[] header;
header = HEADER_MAGIC.getBytes("US-ASCII");
buffer.put(header);
// Insert the genesis block.
lock.lock();
try {
setRingCursor(buffer, FILE_PROLOGUE_BYTES);
} finally {
lock.unlock();
}
Block genesis = params.getGenesisBlock().cloneAsHeader();
StoredBlock storedGenesis = new StoredBlock(genesis, genesis.getWork(), 0);
put(storedGenesis);
setChainHead(storedGenesis);
}
private void createNewStore(NetworkParameters params, File file) throws BlockStoreException {
// Create a new block store if the file wasn't found or anything went wrong whilst reading.
blockMap.clear();
try {
stream = new FileOutputStream(file, false); // Do not append, create fresh.
stream.write(1); // Version.
} catch (IOException e1) {
// We could not load a block store nor could we create a new one!
throw new BlockStoreException(e1);
}
try {
// Set up the genesis block. When we start out fresh, it is by definition the top of the
// chain.
Block genesis = params.genesisBlock.cloneAsHeader();
StoredBlock storedGenesis = new StoredBlock(genesis, genesis.getWork(), 0);
this.chainHead = storedGenesis.getHeader().getHash();
stream.write(this.chainHead.getBytes());
put(storedGenesis);
} catch (VerificationException e1) {
throw new RuntimeException(e1); // Cannot happen.
} catch (IOException e) {
throw new BlockStoreException(e);
}
}
@Test
public void testAppearedAtChainHeightDepthAndWorkDone() throws Exception {
// Test the TransactionConfidence appearedAtChainHeight, depth and workDone field are stored.
BlockChain chain = new BlockChain(params, myWallet, new MemoryBlockStore(params));
final ArrayList<Transaction> txns = new ArrayList<Transaction>(2);
myWallet.addEventListener(
new AbstractWalletEventListener() {
@Override
public void onCoinsReceived(
Wallet wallet, Transaction tx, Coin prevBalance, Coin newBalance) {
txns.add(tx);
}
});
// Start by building two blocks on top of the genesis block.
Block b1 = params.getGenesisBlock().createNextBlock(myAddress);
BigInteger work1 = b1.getWork();
assertTrue(work1.signum() > 0);
Block b2 = b1.createNextBlock(myAddress);
BigInteger work2 = b2.getWork();
assertTrue(work2.signum() > 0);
assertTrue(chain.add(b1));
assertTrue(chain.add(b2));
// We now have the following chain:
// genesis -> b1 -> b2
// Check the transaction confidence levels are correct before wallet roundtrip.
Threading.waitForUserCode();
assertEquals(2, txns.size());
TransactionConfidence confidence0 = txns.get(0).getConfidence();
TransactionConfidence confidence1 = txns.get(1).getConfidence();
assertEquals(1, confidence0.getAppearedAtChainHeight());
assertEquals(2, confidence1.getAppearedAtChainHeight());
assertEquals(2, confidence0.getDepthInBlocks());
assertEquals(1, confidence1.getDepthInBlocks());
// Roundtrip the wallet and check it has stored the depth and workDone.
Wallet rebornWallet = roundTrip(myWallet);
Set<Transaction> rebornTxns = rebornWallet.getTransactions(false);
assertEquals(2, rebornTxns.size());
// The transactions are not guaranteed to be in the same order so sort them to be in chain
// height order if required.
Iterator<Transaction> it = rebornTxns.iterator();
Transaction txA = it.next();
Transaction txB = it.next();
Transaction rebornTx0, rebornTx1;
if (txA.getConfidence().getAppearedAtChainHeight() == 1) {
rebornTx0 = txA;
rebornTx1 = txB;
} else {
rebornTx0 = txB;
rebornTx1 = txA;
}
TransactionConfidence rebornConfidence0 = rebornTx0.getConfidence();
TransactionConfidence rebornConfidence1 = rebornTx1.getConfidence();
assertEquals(1, rebornConfidence0.getAppearedAtChainHeight());
assertEquals(2, rebornConfidence1.getAppearedAtChainHeight());
assertEquals(2, rebornConfidence0.getDepthInBlocks());
assertEquals(1, rebornConfidence1.getDepthInBlocks());
}
