public byte[] getBlockHashByNumber(long blockNumber) {
Block chainBlock = getChainBlockByNumber(blockNumber);
return chainBlock == null
? null
: chainBlock
.getHash(); // FIXME: can be improved by accessing the hash directly in the index
}
/**
* For each block we are looking for our transactions and clearing them The actual receiver
* balance is confirmed upon block arrival
*/
public void onBlock(Block block, List<TransactionReceipt> receipts) {
int cleared = 0;
for (Transaction tx : block.getTransactionsList()) {
ByteArrayWrapper txHash = new ByteArrayWrapper(tx.getHash());
Transaction ptx = pendingTxs.get(txHash);
if (ptx != null) {
logger.info(
" - Pending transaction cleared 0x"
+ Hex.toHexString(tx.getHash()).substring(0, 8)
+ " in block "
+ block.getShortDescr());
pendingTxs.remove(txHash);
cleared++;
}
}
BigInteger receiverBalance = ethereum.getRepository().getBalance(receiverAddress);
BigInteger receiverBalancePending = pendingState.getRepository().getBalance(receiverAddress);
logger.info("" + cleared + " transactions cleared in the block " + block.getShortDescr());
logger.info(
"Receiver pending/current balance: "
+ receiverBalancePending
+ " / "
+ receiverBalance
+ " ("
+ pendingTxs.size()
+ " pending txs)");
}
@Override
public List<BlockHeader> getListHeadersEndWith(byte[] hash, long qty) {
List<Block> blocks = getListBlocksEndWith(hash, qty);
List<BlockHeader> headers = new ArrayList<>(blocks.size());
for (Block b : blocks) {
headers.add(b.getHeader());
}
return headers;
}
@Override
public List<byte[]> getListHashesEndWith(byte[] hash, long number) {
List<Block> blocks = getListBlocksEndWith(hash, number);
List<byte[]> hashes = new ArrayList<>(blocks.size());
for (Block b : blocks) {
hashes.add(b.getHash());
}
return hashes;
}
@Override
public BigInteger getTotalDifficultyForHash(byte[] hash) {
Block block = this.getBlockByHash(hash);
if (block == null) return ZERO;
Long level = block.getNumber();
List<BlockInfo> blockInfos = index.get(level.intValue());
for (BlockInfo blockInfo : blockInfos)
if (areEqual(blockInfo.getHash(), hash)) {
return blockInfo.cummDifficulty;
}
return ZERO;
}
private List<Block> getListBlocksEndWithInner(byte[] hash, long qty) {
Block block = this.blocks.get(hash);
if (block == null) return new ArrayList<>();
List<Block> blocks = new ArrayList<>((int) qty);
for (int i = 0; i < qty; ++i) {
blocks.add(block);
block = this.blocks.get(block.getParentHash());
if (block == null) break;
}
return blocks;
}
@Override
public Block createForkBlock(Block parent) {
try {
List<Transaction> txes = new ArrayList<>();
Map<ByteArrayWrapper, Long> nonces = new HashMap<>();
Repository repoSnapshot =
getBlockchain().getRepository().getSnapshotTo(parent.getStateRoot());
for (PendingTx tx : submittedTxes) {
ByteArrayWrapper senderW = new ByteArrayWrapper(tx.sender.getAddress());
Long nonce = nonces.get(senderW);
if (nonce == null) {
BigInteger bcNonce = repoSnapshot.getNonce(tx.sender.getAddress());
nonce = bcNonce.longValue();
}
nonces.put(senderW, nonce + 1);
byte[] toAddress =
tx.targetContract != null ? tx.targetContract.getAddress() : tx.toAddress;
Transaction transaction =
new Transaction(
ByteUtil.longToBytesNoLeadZeroes(nonce),
ByteUtil.longToBytesNoLeadZeroes(gasPrice),
ByteUtil.longToBytesNoLeadZeroes(gasLimit),
toAddress,
ByteUtil.bigIntegerToBytes(tx.value),
tx.data);
transaction.sign(tx.sender.getPrivKeyBytes());
if (tx.createdContract != null) {
tx.createdContract.setAddress(transaction.getContractAddress());
}
txes.add(transaction);
}
Block b = getBlockchain().createNewBlock(parent, txes, Collections.EMPTY_LIST);
Ethash.getForBlock(b.getNumber()).mineLight(b).get();
ImportResult importResult = getBlockchain().tryToConnect(b);
if (importResult != ImportResult.IMPORTED_BEST
&& importResult != ImportResult.IMPORTED_NOT_BEST) {
throw new RuntimeException(
"Invalid block import result " + importResult + " for block " + b);
}
submittedTxes.clear();
return b;
} catch (InterruptedException | ExecutionException e) {
throw new RuntimeException(e);
}
}
private void addInternalBlock(Block block, BigInteger cummDifficulty, boolean mainChain) {
List<BlockInfo> blockInfos =
block.getNumber() >= index.size()
? new ArrayList<BlockInfo>()
: index.get((int) block.getNumber());
BlockInfo blockInfo = new BlockInfo();
blockInfo.setCummDifficulty(cummDifficulty);
blockInfo.setHash(block.getHash());
blockInfo.setMainChain(
mainChain); // FIXME:maybe here I should force reset main chain for all uncles on that level
blockInfos.add(blockInfo);
index.set((int) block.getNumber(), blockInfos);
blocks.put(block.getHash(), block);
}
@Override
public Object[] callConstFunction(Block callBlock, String functionName, Object... args) {
Transaction tx =
CallTransaction.createCallTransaction(
0,
0,
100000000000000L,
Hex.toHexString(getAddress()),
0,
contract.getByName(functionName),
args);
tx.sign(new byte[32]);
Repository repository =
getBlockchain().getRepository().getSnapshotTo(callBlock.getStateRoot()).startTracking();
try {
org.ethereum.core.TransactionExecutor executor =
new org.ethereum.core.TransactionExecutor(
tx,
callBlock.getCoinbase(),
repository,
getBlockchain().getBlockStore(),
getBlockchain().getProgramInvokeFactory(),
callBlock)
.setLocalCall(true);
executor.init();
executor.execute();
executor.go();
executor.finalization();
return contract.getByName(functionName).decodeResult(executor.getResult().getHReturn());
} finally {
repository.rollback();
}
}
@Override
public void reBranch(Block forkBlock) {
Block bestBlock = getBestBlock();
long maxLevel = Math.max(bestBlock.getNumber(), forkBlock.getNumber());
// 1. First ensure that you are one the save level
long currentLevel = maxLevel;
Block forkLine = forkBlock;
if (forkBlock.getNumber() > bestBlock.getNumber()) {
while (currentLevel > bestBlock.getNumber()) {
List<BlockInfo> blocks = getBlockInfoForLevel(currentLevel);
BlockInfo blockInfo = getBlockInfoForHash(blocks, forkLine.getHash());
if (blockInfo != null) {
blockInfo.setMainChain(true);
setBlockInfoForLevel(currentLevel, blocks);
}
forkLine = getBlockByHash(forkLine.getParentHash());
--currentLevel;
}
}
Block bestLine = bestBlock;
if (bestBlock.getNumber() > forkBlock.getNumber()) {
while (currentLevel > forkBlock.getNumber()) {
List<BlockInfo> blocks = getBlockInfoForLevel(currentLevel);
BlockInfo blockInfo = getBlockInfoForHash(blocks, bestLine.getHash());
if (blockInfo != null) {
blockInfo.setMainChain(false);
setBlockInfoForLevel(currentLevel, blocks);
}
bestLine = getBlockByHash(bestLine.getParentHash());
--currentLevel;
}
}
// 2. Loop back on each level until common block
while (!bestLine.isEqual(forkLine)) {
List<BlockInfo> levelBlocks = getBlockInfoForLevel(currentLevel);
BlockInfo bestInfo = getBlockInfoForHash(levelBlocks, bestLine.getHash());
if (bestInfo != null) {
bestInfo.setMainChain(false);
setBlockInfoForLevel(currentLevel, levelBlocks);
}
BlockInfo forkInfo = getBlockInfoForHash(levelBlocks, forkLine.getHash());
if (forkInfo != null) {
forkInfo.setMainChain(true);
setBlockInfoForLevel(currentLevel, levelBlocks);
}
bestLine = getBlockByHash(bestLine.getParentHash());
forkLine = getBlockByHash(forkLine.getParentHash());
--currentLevel;
}
}