>,
factories: Factories,
}
const HISTORY: u64 = 1200;
/// Append a path element to the given path and return the string.
pub fn append_path(path: P, item: &str) -> String where P: AsRef {
let mut p = path.as_ref().to_path_buf();
p.push(item);
p.to_str().unwrap().to_owned()
}
impl Client {
/// Create a new client with given spec and DB path and custom verifier.
pub fn new(
config: ClientConfig,
spec: &Spec,
path: &Path,
miner: Arc,
message_channel: IoChannel,
) -> Result, ClientError> {
let path = path.to_path_buf();
let gb = spec.genesis_block();
let mut db_config = DatabaseConfig::with_columns(::db::NUM_COLUMNS);
db_config.cache_size = config.db_cache_size;
db_config.compaction = config.db_compaction.compaction_profile();
db_config.wal = config.db_wal;
let db = Arc::new(try!(Database::open(&db_config, &path.to_str().unwrap()).map_err(ClientError::Database)));
let chain = Arc::new(BlockChain::new(config.blockchain, &gb, db.clone()));
let tracedb = Arc::new(try!(TraceDB::new(config.tracing, db.clone(), chain.clone())));
let mut state_db = journaldb::new(db.clone(), config.pruning, ::db::COL_STATE);
if state_db.is_empty() && try!(spec.ensure_db_good(state_db.as_hashdb_mut())) {
let batch = DBTransaction::new(&db);
try!(state_db.commit(&batch, 0, &spec.genesis_header().hash(), None));
try!(db.write(batch).map_err(ClientError::Database));
}
if !chain.block_header(&chain.best_block_hash()).map_or(true, |h| state_db.contains(h.state_root())) {
warn!("State root not found for block #{} ({})", chain.best_block_number(), chain.best_block_hash().hex());
}
let engine = spec.engine.clone();
let block_queue = BlockQueue::new(config.queue, engine.clone(), message_channel.clone());
let panic_handler = PanicHandler::new_in_arc();
panic_handler.forward_from(&block_queue);
let awake = match config.mode { Mode::Dark(..) => false, _ => true };
let factories = Factories {
vm: EvmFactory::new(config.vm_type),
trie: TrieFactory::new(config.trie_spec),
accountdb: Default::default(),
};
let client = Client {
sleep_state: Mutex::new(SleepState::new(awake)),
liveness: AtomicBool::new(awake),
mode: config.mode,
chain: chain,
tracedb: tracedb,
engine: engine,
db: db,
state_db: Mutex::new(state_db),
block_queue: block_queue,
report: RwLock::new(Default::default()),
import_lock: Mutex::new(()),
panic_handler: panic_handler,
verifier: verification::new(config.verifier_type),
miner: miner,
io_channel: message_channel,
notify: RwLock::new(Vec::new()),
queue_transactions: AtomicUsize::new(0),
last_hashes: RwLock::new(VecDeque::new()),
factories: factories,
};
Ok(Arc::new(client))
}
/// Adds an actor to be notified on certain events
pub fn add_notify(&self, target: Arc) {
self.notify.write().push(Arc::downgrade(&target));
}
fn notify(&self, f: F) where F: Fn(&ChainNotify) {
for np in self.notify.read().iter() {
if let Some(n) = np.upgrade() {
f(&*n);
}
}
}
/// Flush the block import queue.
pub fn flush_queue(&self) {
self.block_queue.flush();
while !self.block_queue.queue_info().is_empty() {
self.import_verified_blocks();
}
}
fn build_last_hashes(&self, parent_hash: H256) -> Arc {
{
let hashes = self.last_hashes.read();
if hashes.front().map_or(false, |h| h == &parent_hash) {
let mut res = Vec::from(hashes.clone());
res.resize(256, H256::default());
return Arc::new(res);
}
}
let mut last_hashes = LastHashes::new();
last_hashes.resize(256, H256::default());
last_hashes[0] = parent_hash;
for i in 0..255 {
match self.chain.block_details(&last_hashes[i]) {
Some(details) => {
last_hashes[i + 1] = details.parent.clone();
},
None => break,
}
}
let mut cached_hashes = self.last_hashes.write();
*cached_hashes = VecDeque::from(last_hashes.clone());
Arc::new(last_hashes)
}
fn check_and_close_block(&self, block: &PreverifiedBlock) -> Result {
let engine = &*self.engine;
let header = &block.header;
// Check the block isn't so old we won't be able to enact it.
let best_block_number = self.chain.best_block_number();
if best_block_number >= HISTORY && header.number() <= best_block_number - HISTORY {
warn!(target: "client", "Block import failed for #{} ({})\nBlock is ancient (current best block: #{}).", header.number(), header.hash(), best_block_number);
return Err(());
}
// Verify Block Family
let verify_family_result = self.verifier.verify_block_family(header, &block.bytes, engine, &*self.chain);
if let Err(e) = verify_family_result {
warn!(target: "client", "Stage 3 block verification failed for #{} ({})\nError: {:?}", header.number(), header.hash(), e);
return Err(());
};
// Check if Parent is in chain
let chain_has_parent = self.chain.block_header(&header.parent_hash);
if let None = chain_has_parent {
warn!(target: "client", "Block import failed for #{} ({}): Parent not found ({}) ", header.number(), header.hash(), header.parent_hash);
return Err(());
};
// Enact Verified Block
let parent = chain_has_parent.unwrap();
let last_hashes = self.build_last_hashes(header.parent_hash.clone());
let db = self.state_db.lock().boxed_clone();
let enact_result = enact_verified(block, engine, self.tracedb.tracing_enabled(), db, &parent, last_hashes, self.factories.clone());
if let Err(e) = enact_result {
warn!(target: "client", "Block import failed for #{} ({})\nError: {:?}", header.number(), header.hash(), e);
return Err(());
};
// Final Verification
let locked_block = enact_result.unwrap();
if let Err(e) = self.verifier.verify_block_final(header, locked_block.block().header()) {
warn!(target: "client", "Stage 4 block verification failed for #{} ({})\nError: {:?}", header.number(), header.hash(), e);
return Err(());
}
Ok(locked_block)
}
fn calculate_enacted_retracted(&self, import_results: &[ImportRoute]) -> (Vec, Vec) {
fn map_to_vec(map: Vec<(H256, bool)>) -> Vec {
map.into_iter().map(|(k, _v)| k).collect()
}
// In ImportRoute we get all the blocks that have been enacted and retracted by single insert.
// Because we are doing multiple inserts some of the blocks that were enacted in import `k`
// could be retracted in import `k+1`. This is why to understand if after all inserts
// the block is enacted or retracted we iterate over all routes and at the end final state
// will be in the hashmap
let map = import_results.iter().fold(HashMap::new(), |mut map, route| {
for hash in &route.enacted {
map.insert(hash.clone(), true);
}
for hash in &route.retracted {
map.insert(hash.clone(), false);
}
map
});
// Split to enacted retracted (using hashmap value)
let (enacted, retracted) = map.into_iter().partition(|&(_k, v)| v);
// And convert tuples to keys
(map_to_vec(enacted), map_to_vec(retracted))
}
/// This is triggered by a message coming from a block queue when the block is ready for insertion
pub fn import_verified_blocks(&self) -> usize {
let max_blocks_to_import = 64;
let (imported_blocks, import_results, invalid_blocks, imported, duration) = {
let mut imported_blocks = Vec::with_capacity(max_blocks_to_import);
let mut invalid_blocks = HashSet::new();
let mut import_results = Vec::with_capacity(max_blocks_to_import);
let _import_lock = self.import_lock.lock();
let _timer = PerfTimer::new("import_verified_blocks");
let start = precise_time_ns();
let blocks = self.block_queue.drain(max_blocks_to_import);
for block in blocks {
let header = &block.header;
if invalid_blocks.contains(&header.parent_hash) {
invalid_blocks.insert(header.hash());
continue;
}
let closed_block = self.check_and_close_block(&block);
if let Err(_) = closed_block {
invalid_blocks.insert(header.hash());
continue;
}
let closed_block = closed_block.unwrap();
imported_blocks.push(header.hash());
let route = self.commit_block(closed_block, &header.hash(), &block.bytes);
import_results.push(route);
self.report.write().accrue_block(&block);
}
let imported = imported_blocks.len();
let invalid_blocks = invalid_blocks.into_iter().collect::>();
{
if !invalid_blocks.is_empty() {
self.block_queue.mark_as_bad(&invalid_blocks);
}
if !imported_blocks.is_empty() {
self.block_queue.mark_as_good(&imported_blocks);
}
}
let duration_ns = precise_time_ns() - start;
(imported_blocks, import_results, invalid_blocks, imported, duration_ns)
};
{
if !imported_blocks.is_empty() && self.block_queue.queue_info().is_empty() {
let (enacted, retracted) = self.calculate_enacted_retracted(&import_results);
if self.queue_info().is_empty() {
self.miner.chain_new_blocks(self, &imported_blocks, &invalid_blocks, &enacted, &retracted);
}
self.notify(|notify| {
notify.new_blocks(
imported_blocks.clone(),
invalid_blocks.clone(),
enacted.clone(),
retracted.clone(),
Vec::new(),
duration,
);
});
}
}
self.db.flush().expect("DB flush failed.");
imported
}
fn commit_block(&self, block: B, hash: &H256, block_data: &[u8]) -> ImportRoute where B: IsBlock + Drain {
let number = block.header().number();
let parent = block.header().parent_hash().clone();
// Are we committing an era?
let ancient = if number >= HISTORY {
let n = number - HISTORY;
Some((n, self.chain.block_hash(n).unwrap()))
} else {
None
};
// Commit results
let receipts = block.receipts().to_owned();
let traces = block.traces().clone().unwrap_or_else(Vec::new);
let traces: Vec = traces.into_iter()
.map(Into::into)
.collect();
//let traces = From::from(block.traces().clone().unwrap_or_else(Vec::new));
let batch = DBTransaction::new(&self.db);
// CHECK! I *think* this is fine, even if the state_root is equal to another
// already-imported block of the same number.
// TODO: Prove it with a test.
block.drain().commit(&batch, number, hash, ancient).expect("DB commit failed.");
let route = self.chain.insert_block(&batch, block_data, receipts);
self.tracedb.import(&batch, TraceImportRequest {
traces: traces.into(),
block_hash: hash.clone(),
block_number: number,
enacted: route.enacted.clone(),
retracted: route.retracted.len()
});
// Final commit to the DB
self.db.write_buffered(batch);
self.chain.commit();
self.update_last_hashes(&parent, hash);
route
}
fn update_last_hashes(&self, parent: &H256, hash: &H256) {
let mut hashes = self.last_hashes.write();
if hashes.front().map_or(false, |h| h == parent) {
if hashes.len() > 255 {
hashes.pop_back();
}
hashes.push_front(hash.clone());
}
}
/// Import transactions from the IO queue
pub fn import_queued_transactions(&self, transactions: &[Bytes]) -> usize {
let _timer = PerfTimer::new("import_queued_transactions");
self.queue_transactions.fetch_sub(transactions.len(), AtomicOrdering::SeqCst);
let txs = transactions.iter().filter_map(|bytes| UntrustedRlp::new(bytes).as_val().ok()).collect();
let results = self.miner.import_external_transactions(self, txs);
results.len()
}
/// Attempt to get a copy of a specific block's final state.
///
/// This will not fail if given BlockID::Latest.
/// Otherwise, this can fail (but may not) if the DB prunes state.
pub fn state_at(&self, id: BlockID) -> Option {
// fast path for latest state.
match id.clone() {
BlockID::Pending => return self.miner.pending_state().or_else(|| Some(self.state())),
BlockID::Latest => return Some(self.state()),
_ => {},
}
let block_number = match self.block_number(id.clone()) {
Some(num) => num,
None => return None,
};
self.block_header(id).and_then(|header| {
let db = self.state_db.lock().boxed_clone();
// early exit for pruned blocks
if db.is_pruned() && self.chain.best_block_number() >= block_number + HISTORY {
return None;
}
let root = HeaderView::new(&header).state_root();
State::from_existing(db, root, self.engine.account_start_nonce(), self.factories.clone()).ok()
})
}
/// Attempt to get a copy of a specific block's beginning state.
///
/// This will not fail if given BlockID::Latest.
/// Otherwise, this can fail (but may not) if the DB prunes state.
pub fn state_at_beginning(&self, id: BlockID) -> Option {
// fast path for latest state.
match id {
BlockID::Pending => self.state_at(BlockID::Latest),
id => match self.block_number(id) {
None | Some(0) => None,
Some(n) => self.state_at(BlockID::Number(n - 1)),
}
}
}
/// Get a copy of the best block's state.
pub fn state(&self) -> State {
State::from_existing(
self.state_db.lock().boxed_clone(),
HeaderView::new(&self.best_block_header()).state_root(),
self.engine.account_start_nonce(),
self.factories.clone())
.expect("State root of best block header always valid.")
}
/// Get info on the cache.
pub fn blockchain_cache_info(&self) -> BlockChainCacheSize {
self.chain.cache_size()
}
/// Get the report.
pub fn report(&self) -> ClientReport {
let mut report = self.report.read().clone();
report.state_db_mem = self.state_db.lock().mem_used();
report
}
/// Tick the client.
// TODO: manage by real events.
pub fn tick(&self) {
self.chain.collect_garbage();
self.block_queue.collect_garbage();
self.tracedb.collect_garbage();
match self.mode {
Mode::Dark(timeout) => {
let mut ss = self.sleep_state.lock();
if let Some(t) = ss.last_activity {
if Instant::now() > t + timeout {
self.sleep();
ss.last_activity = None;
}
}
}
Mode::Passive(timeout, wakeup_after) => {
let mut ss = self.sleep_state.lock();
let now = Instant::now();
if let Some(t) = ss.last_activity {
if now > t + timeout {
self.sleep();
ss.last_activity = None;
ss.last_autosleep = Some(now);
}
}
if let Some(t) = ss.last_autosleep {
if now > t + wakeup_after {
self.wake_up();
ss.last_activity = Some(now);
ss.last_autosleep = None;
}
}
}
_ => {}
}
}
/// Look up the block number for the given block ID.
pub fn block_number(&self, id: BlockID) -> Option {
match id {
BlockID::Number(number) => Some(number),
BlockID::Hash(ref hash) => self.chain.block_number(hash),
BlockID::Earliest => Some(0),
BlockID::Latest | BlockID::Pending => Some(self.chain.best_block_number()),
}
}
/// Take a snapshot at the given block.
/// If the ID given is "latest", this will default to 1000 blocks behind.
pub fn take_snapshot(&self, writer: W, at: BlockID, p: &snapshot::Progress) -> Result<(), ::error::Error> {
let db = self.state_db.lock().boxed_clone();
let best_block_number = self.chain_info().best_block_number;
let block_number = try!(self.block_number(at).ok_or(snapshot::Error::InvalidStartingBlock(at)));
if best_block_number > HISTORY + block_number && db.is_pruned() {
return Err(snapshot::Error::OldBlockPrunedDB.into());
}
let start_hash = match at {
BlockID::Latest => {
let start_num = if best_block_number > 1000 {
best_block_number - 1000
} else {
0
};
self.block_hash(BlockID::Number(start_num))
.expect("blocks within HISTORY are always stored.")
}
_ => match self.block_hash(at) {
Some(hash) => hash,
None => return Err(snapshot::Error::InvalidStartingBlock(at).into()),
},
};
try!(snapshot::take_snapshot(&self.chain, start_hash, db.as_hashdb(), writer, p));
Ok(())
}
fn block_hash(chain: &BlockChain, id: BlockID) -> Option {
match id {
BlockID::Hash(hash) => Some(hash),
BlockID::Number(number) => chain.block_hash(number),
BlockID::Earliest => chain.block_hash(0),
BlockID::Latest | BlockID::Pending => Some(chain.best_block_hash()),
}
}
fn transaction_address(&self, id: TransactionID) -> Option {
match id {
TransactionID::Hash(ref hash) => self.chain.transaction_address(hash),
TransactionID::Location(id, index) => Self::block_hash(&self.chain, id).map(|hash| TransactionAddress {
block_hash: hash,
index: index,
})
}
}
fn wake_up(&self) {
if !self.liveness.load(AtomicOrdering::Relaxed) {
self.liveness.store(true, AtomicOrdering::Relaxed);
self.notify(|n| n.start());
trace!(target: "mode", "wake_up: Waking.");
}
}
fn sleep(&self) {
if self.liveness.load(AtomicOrdering::Relaxed) {
// only sleep if the import queue is mostly empty.
if self.queue_info().total_queue_size() <= MAX_QUEUE_SIZE_TO_SLEEP_ON {
self.liveness.store(false, AtomicOrdering::Relaxed);
self.notify(|n| n.stop());
trace!(target: "mode", "sleep: Sleeping.");
} else {
trace!(target: "mode", "sleep: Cannot sleep - syncing ongoing.");
// TODO: Consider uncommenting.
//*self.last_activity.lock() = Some(Instant::now());
}
}
}
}
impl BlockChainClient for Client {
fn call(&self, t: &SignedTransaction, block: BlockID, analytics: CallAnalytics) -> Result {
let header = try!(self.block_header(block).ok_or(CallError::StatePruned));
let view = HeaderView::new(&header);
let last_hashes = self.build_last_hashes(view.hash());
let env_info = EnvInfo {
number: view.number(),
author: view.author(),
timestamp: view.timestamp(),
difficulty: view.difficulty(),
last_hashes: last_hashes,
gas_used: U256::zero(),
gas_limit: U256::max_value(),
};
// that's just a copy of the state.
let mut state = try!(self.state_at(block).ok_or(CallError::StatePruned));
let original_state = if analytics.state_diffing { Some(state.clone()) } else { None };
let sender = try!(t.sender().map_err(|e| {
let message = format!("Transaction malformed: {:?}", e);
ExecutionError::TransactionMalformed(message)
}));
let balance = state.balance(&sender);
let needed_balance = t.value + t.gas * t.gas_price;
if balance < needed_balance {
// give the sender a sufficient balance
state.add_balance(&sender, &(needed_balance - balance));
}
let options = TransactOptions { tracing: analytics.transaction_tracing, vm_tracing: analytics.vm_tracing, check_nonce: false };
let mut ret = try!(Executive::new(&mut state, &env_info, &*self.engine, &self.factories.vm).transact(t, options));
// TODO gav move this into Executive.
ret.state_diff = original_state.map(|original| state.diff_from(original));
Ok(ret)
}
fn replay(&self, id: TransactionID, analytics: CallAnalytics) -> Result {
let address = try!(self.transaction_address(id).ok_or(CallError::TransactionNotFound));
let header_data = try!(self.block_header(BlockID::Hash(address.block_hash)).ok_or(CallError::StatePruned));
let body_data = try!(self.block_body(BlockID::Hash(address.block_hash)).ok_or(CallError::StatePruned));
let mut state = try!(self.state_at_beginning(BlockID::Hash(address.block_hash)).ok_or(CallError::StatePruned));
let txs = BodyView::new(&body_data).transactions();
if address.index >= txs.len() {
return Err(CallError::TransactionNotFound);
}
let options = TransactOptions { tracing: analytics.transaction_tracing, vm_tracing: analytics.vm_tracing, check_nonce: false };
let view = HeaderView::new(&header_data);
let last_hashes = self.build_last_hashes(view.hash());
let mut env_info = EnvInfo {
number: view.number(),
author: view.author(),
timestamp: view.timestamp(),
difficulty: view.difficulty(),
last_hashes: last_hashes,
gas_used: U256::default(),
gas_limit: view.gas_limit(),
};
for t in txs.iter().take(address.index) {
match Executive::new(&mut state, &env_info, &*self.engine, &self.factories.vm).transact(t, Default::default()) {
Ok(x) => { env_info.gas_used = env_info.gas_used + x.gas_used; }
Err(ee) => { return Err(CallError::Execution(ee)) }
}
}
let t = &txs[address.index];
let original_state = if analytics.state_diffing { Some(state.clone()) } else { None };
let mut ret = try!(Executive::new(&mut state, &env_info, &*self.engine, &self.factories.vm).transact(t, options));
ret.state_diff = original_state.map(|original| state.diff_from(original));
Ok(ret)
}
fn keep_alive(&self) {
if self.mode != Mode::Active {
self.wake_up();
(*self.sleep_state.lock()).last_activity = Some(Instant::now());
}
}
fn best_block_header(&self) -> Bytes {
self.chain.best_block_header()
}
fn block_header(&self, id: BlockID) -> Option {
Self::block_hash(&self.chain, id).and_then(|hash| self.chain.block_header_data(&hash))
}
fn block_body(&self, id: BlockID) -> Option {
Self::block_hash(&self.chain, id).and_then(|hash| self.chain.block_body(&hash))
}
fn block(&self, id: BlockID) -> Option {
if let BlockID::Pending = id {
if let Some(block) = self.miner.pending_block() {
return Some(block.rlp_bytes(Seal::Without));
}
}
Self::block_hash(&self.chain, id).and_then(|hash| {
self.chain.block(&hash)
})
}
fn block_status(&self, id: BlockID) -> BlockStatus {
match Self::block_hash(&self.chain, id) {
Some(ref hash) if self.chain.is_known(hash) => BlockStatus::InChain,
Some(hash) => self.block_queue.block_status(&hash),
None => BlockStatus::Unknown
}
}
fn block_total_difficulty(&self, id: BlockID) -> Option {
if let BlockID::Pending = id {
if let Some(block) = self.miner.pending_block() {
return Some(*block.header.difficulty() + self.block_total_difficulty(BlockID::Latest).expect("blocks in chain have details; qed"));
}
}
Self::block_hash(&self.chain, id).and_then(|hash| self.chain.block_details(&hash)).map(|d| d.total_difficulty)
}
fn nonce(&self, address: &Address, id: BlockID) -> Option {
self.state_at(id).map(|s| s.nonce(address))
}
fn block_hash(&self, id: BlockID) -> Option {
Self::block_hash(&self.chain, id)
}
fn code(&self, address: &Address, id: BlockID) -> Option> {
self.state_at(id).map(|s| s.code(address))
}
fn balance(&self, address: &Address, id: BlockID) -> Option {
self.state_at(id).map(|s| s.balance(address))
}
fn storage_at(&self, address: &Address, position: &H256, id: BlockID) -> Option {
self.state_at(id).map(|s| s.storage_at(address, position))
}
fn transaction(&self, id: TransactionID) -> Option {
self.transaction_address(id).and_then(|address| self.chain.transaction(&address))
}
fn uncle(&self, id: UncleID) -> Option {
let index = id.position;
self.block_body(id.block).and_then(|body| BodyView::new(&body).uncle_rlp_at(index))
}
fn transaction_receipt(&self, id: TransactionID) -> Option {
self.transaction_address(id).and_then(|address| self.chain.block_number(&address.block_hash).and_then(|block_number| {
let t = self.chain.block_body(&address.block_hash)
.and_then(|block| BodyView::new(&block).localized_transaction_at(&address.block_hash, block_number, address.index));
match (t, self.chain.transaction_receipt(&address)) {
(Some(tx), Some(receipt)) => {
let block_hash = tx.block_hash.clone();
let block_number = tx.block_number.clone();
let transaction_hash = tx.hash();
let transaction_index = tx.transaction_index;
let prior_gas_used = match tx.transaction_index {
0 => U256::zero(),
i => {
let prior_address = TransactionAddress { block_hash: address.block_hash, index: i - 1 };
let prior_receipt = self.chain.transaction_receipt(&prior_address).expect("Transaction receipt at `address` exists; `prior_address` has lower index in same block; qed");
prior_receipt.gas_used
}
};
Some(LocalizedReceipt {
transaction_hash: tx.hash(),
transaction_index: tx.transaction_index,
block_hash: tx.block_hash,
block_number: tx.block_number,
cumulative_gas_used: receipt.gas_used,
gas_used: receipt.gas_used - prior_gas_used,
contract_address: match tx.action {
Action::Call(_) => None,
Action::Create => Some(contract_address(&tx.sender().unwrap(), &tx.nonce))
},
logs: receipt.logs.into_iter().enumerate().map(|(i, log)| LocalizedLogEntry {
entry: log,
block_hash: block_hash.clone(),
block_number: block_number,
transaction_hash: transaction_hash.clone(),
transaction_index: transaction_index,
log_index: i
}).collect()
})
},
_ => None
}
}))
}
fn tree_route(&self, from: &H256, to: &H256) -> Option {
match self.chain.is_known(from) && self.chain.is_known(to) {
true => Some(self.chain.tree_route(from.clone(), to.clone())),
false => None
}
}
fn find_uncles(&self, hash: &H256) -> Option> {
self.chain.find_uncle_hashes(hash, self.engine.maximum_uncle_age())
}
fn state_data(&self, hash: &H256) -> Option {
self.state_db.lock().state(hash)
}
fn block_receipts(&self, hash: &H256) -> Option {
self.chain.block_receipts(hash).map(|receipts| rlp::encode(&receipts).to_vec())
}
fn import_block(&self, bytes: Bytes) -> Result {
{
let header = BlockView::new(&bytes).header_view();
if self.chain.is_known(&header.sha3()) {
return Err(BlockImportError::Import(ImportError::AlreadyInChain));
}
if self.block_status(BlockID::Hash(header.parent_hash())) == BlockStatus::Unknown {
return Err(BlockImportError::Block(BlockError::UnknownParent(header.parent_hash())));
}
}
Ok(try!(self.block_queue.import_block(bytes)))
}
fn queue_info(&self) -> BlockQueueInfo {
self.block_queue.queue_info()
}
fn clear_queue(&self) {
self.block_queue.clear();
}
fn chain_info(&self) -> BlockChainInfo {
BlockChainInfo {
total_difficulty: self.chain.best_block_total_difficulty(),
pending_total_difficulty: self.chain.best_block_total_difficulty(),
genesis_hash: self.chain.genesis_hash(),
best_block_hash: self.chain.best_block_hash(),
best_block_number: From::from(self.chain.best_block_number())
}
}
fn additional_params(&self) -> BTreeMap {
self.engine.additional_params().into_iter().collect()
}
fn blocks_with_bloom(&self, bloom: &H2048, from_block: BlockID, to_block: BlockID) -> Option> {
match (self.block_number(from_block), self.block_number(to_block)) {
(Some(from), Some(to)) => Some(self.chain.blocks_with_bloom(bloom, from, to)),
_ => None
}
}
fn logs(&self, filter: Filter) -> Vec {
// TODO: lock blockchain only once
let mut blocks = filter.bloom_possibilities().iter()
.filter_map(|bloom| self.blocks_with_bloom(bloom, filter.from_block.clone(), filter.to_block.clone()))
.flat_map(|m| m)
// remove duplicate elements
.collect::>()
.into_iter()
.collect::>();
blocks.sort();
blocks.into_iter()
.filter_map(|number| self.chain.block_hash(number).map(|hash| (number, hash)))
.filter_map(|(number, hash)| self.chain.block_receipts(&hash).map(|r| (number, hash, r.receipts)))
.filter_map(|(number, hash, receipts)| self.chain.block_body(&hash).map(|ref b| (number, hash, receipts, BodyView::new(b).transaction_hashes())))
.flat_map(|(number, hash, receipts, hashes)| {
let mut log_index = 0;
receipts.into_iter()
.enumerate()
.flat_map(|(index, receipt)| {
log_index += receipt.logs.len();
receipt.logs.into_iter()
.enumerate()
.filter(|tuple| filter.matches(&tuple.1))
.map(|(i, log)| LocalizedLogEntry {
entry: log,
block_hash: hash.clone(),
block_number: number,
transaction_hash: hashes.get(index).cloned().unwrap_or_else(H256::default),
transaction_index: index,
log_index: log_index + i
})
.collect::>()
})
.collect::>()
})
.collect()
}
fn filter_traces(&self, filter: TraceFilter) -> Option> {
let start = self.block_number(filter.range.start);
let end = self.block_number(filter.range.end);
if start.is_some() && end.is_some() {
let filter = trace::Filter {
range: start.unwrap() as usize..end.unwrap() as usize,
from_address: From::from(filter.from_address),
to_address: From::from(filter.to_address),
};
let traces = self.tracedb.filter(&filter);
Some(traces)
} else {
None
}
}
fn trace(&self, trace: TraceId) -> Option {
let trace_address = trace.address;
self.transaction_address(trace.transaction)
.and_then(|tx_address| {
self.block_number(BlockID::Hash(tx_address.block_hash))
.and_then(|number| self.tracedb.trace(number, tx_address.index, trace_address))
})
}
fn transaction_traces(&self, transaction: TransactionID) -> Option> {
self.transaction_address(transaction)
.and_then(|tx_address| {
self.block_number(BlockID::Hash(tx_address.block_hash))
.and_then(|number| self.tracedb.transaction_traces(number, tx_address.index))
})
}
fn block_traces(&self, block: BlockID) -> Option> {
self.block_number(block)
.and_then(|number| self.tracedb.block_traces(number))
}
fn last_hashes(&self) -> LastHashes {
(*self.build_last_hashes(self.chain.best_block_hash())).clone()
}
fn queue_transactions(&self, transactions: Vec) {
if self.queue_transactions.load(AtomicOrdering::Relaxed) > MAX_TX_QUEUE_SIZE {
debug!("Ignoring {} transactions: queue is full", transactions.len());
} else {
let len = transactions.len();
match self.io_channel.send(ClientIoMessage::NewTransactions(transactions)) {
Ok(_) => {
self.queue_transactions.fetch_add(len, AtomicOrdering::SeqCst);
}
Err(e) => {
debug!("Ignoring {} transactions: error queueing: {}", len, e);
}
}
}
}
fn pending_transactions(&self) -> Vec {
self.miner.pending_transactions()
}
}
impl MiningBlockChainClient for Client {
fn prepare_open_block(&self, author: Address, gas_range_target: (U256, U256), extra_data: Bytes) -> OpenBlock {
let engine = &*self.engine;
let h = self.chain.best_block_hash();
let mut open_block = OpenBlock::new(
engine,
self.factories.clone(),
false, // TODO: this will need to be parameterised once we want to do immediate mining insertion.
self.state_db.lock().boxed_clone(),
&self.chain.block_header(&h).expect("h is best block hash: so its header must exist: qed"),
self.build_last_hashes(h.clone()),
author,
gas_range_target,
extra_data,
).expect("OpenBlock::new only fails if parent state root invalid; state root of best block's header is never invalid; qed");
// Add uncles
self.chain
.find_uncle_headers(&h, engine.maximum_uncle_age())
.unwrap()
.into_iter()
.take(engine.maximum_uncle_count())
.foreach(|h| {
open_block.push_uncle(h).unwrap();
});
open_block
}
fn vm_factory(&self) -> &EvmFactory {
&self.factories.vm
}
fn import_sealed_block(&self, block: SealedBlock) -> ImportResult {
let _import_lock = self.import_lock.lock();
let _timer = PerfTimer::new("import_sealed_block");
let start = precise_time_ns();
let h = block.header().hash();
let number = block.header().number();
let block_data = block.rlp_bytes();
let route = self.commit_block(block, &h, &block_data);
trace!(target: "client", "Imported sealed block #{} ({})", number, h);
let (enacted, retracted) = self.calculate_enacted_retracted(&[route]);
self.miner.chain_new_blocks(self, &[h.clone()], &[], &enacted, &retracted);
self.notify(|notify| {
notify.new_blocks(
vec![h.clone()],
vec![],
enacted.clone(),
retracted.clone(),
vec![h.clone()],
precise_time_ns() - start,
);
});
self.db.flush().expect("DB flush failed.");
Ok(h)
}
}
impl MayPanic for Client {
fn on_panic(&self, closure: F) where F: OnPanicListener {
self.panic_handler.on_panic(closure);
}
}