e95b093483
* ethereum-types refactor in progress * ethereum-types refactor in progress * ethereum-types refactor in progress * ethereum-types refactor in progress * ethereum-types refactor finished * removed obsolete util/src/lib.rs * removed commented out code
432 lines
13 KiB
Rust
432 lines
13 KiB
Rust
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
|
|
// This file is part of Parity.
|
|
|
|
// Parity is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
|
|
// Parity is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with Parity. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
use std::sync::Arc;
|
|
use std::collections::{HashMap, BTreeSet};
|
|
|
|
use ethereum_types::{H160, H256};
|
|
|
|
use error;
|
|
use listener::{Listener, NoopListener};
|
|
use options::Options;
|
|
use ready::{Ready, Readiness};
|
|
use scoring::{Scoring, ScoreWithRef};
|
|
use status::{LightStatus, Status};
|
|
use transactions::{AddResult, Transactions};
|
|
|
|
use {VerifiedTransaction};
|
|
|
|
type Sender = H160;
|
|
|
|
/// A transaction pool.
|
|
#[derive(Debug)]
|
|
pub struct Pool<T, S: Scoring<T>, L = NoopListener> {
|
|
listener: L,
|
|
scoring: S,
|
|
options: Options,
|
|
mem_usage: usize,
|
|
|
|
transactions: HashMap<Sender, Transactions<T, S>>,
|
|
by_hash: HashMap<H256, Arc<T>>,
|
|
|
|
best_transactions: BTreeSet<ScoreWithRef<T, S::Score>>,
|
|
worst_transactions: BTreeSet<ScoreWithRef<T, S::Score>>,
|
|
}
|
|
|
|
impl<T: VerifiedTransaction, S: Scoring<T> + Default> Default for Pool<T, S> {
|
|
fn default() -> Self {
|
|
Self::with_scoring(S::default(), Options::default())
|
|
}
|
|
}
|
|
|
|
impl<T: VerifiedTransaction, S: Scoring<T> + Default> Pool<T, S> {
|
|
/// Creates a new `Pool` with given options
|
|
/// and default `Scoring` and `Listener`.
|
|
pub fn with_options(options: Options) -> Self {
|
|
Self::with_scoring(S::default(), options)
|
|
}
|
|
}
|
|
|
|
impl<T: VerifiedTransaction, S: Scoring<T>> Pool<T, S> {
|
|
/// Creates a new `Pool` with given `Scoring` and options.
|
|
pub fn with_scoring(scoring: S, options: Options) -> Self {
|
|
Self::new(NoopListener, scoring, options)
|
|
}
|
|
}
|
|
|
|
|
|
const INITIAL_NUMBER_OF_SENDERS: usize = 16;
|
|
|
|
impl<T, S, L> Pool<T, S, L> where
|
|
T: VerifiedTransaction,
|
|
S: Scoring<T>,
|
|
L: Listener<T>,
|
|
{
|
|
/// Creates new `Pool` with given `Scoring`, `Listener` and options.
|
|
pub fn new(listener: L, scoring: S, options: Options) -> Self {
|
|
let transactions = HashMap::with_capacity(INITIAL_NUMBER_OF_SENDERS);
|
|
let by_hash = HashMap::with_capacity(options.max_count / 16);
|
|
|
|
Pool {
|
|
listener,
|
|
scoring,
|
|
options,
|
|
mem_usage: 0,
|
|
transactions,
|
|
by_hash,
|
|
best_transactions: Default::default(),
|
|
worst_transactions: Default::default(),
|
|
}
|
|
|
|
}
|
|
|
|
/// Attempts to import new transaction to the pool, returns a `Arc<T>` or an `Error`.
|
|
///
|
|
/// NOTE: Since `Ready`ness is separate from the pool it's possible to import stalled transactions.
|
|
/// It's the caller responsibility to make sure that's not the case.
|
|
///
|
|
/// NOTE: The transaction may push out some other transactions from the pool
|
|
/// either because of limits (see `Options`) or because `Scoring` decides that the transaction
|
|
/// replaces an existing transaction from that sender.
|
|
/// If any limit is reached the transaction with the lowest `Score` is evicted to make room.
|
|
///
|
|
/// The `Listener` will be informed on any drops or rejections.
|
|
pub fn import(&mut self, mut transaction: T) -> error::Result<Arc<T>> {
|
|
let mem_usage = transaction.mem_usage();
|
|
|
|
ensure!(!self.by_hash.contains_key(transaction.hash()), error::ErrorKind::AlreadyImported(*transaction.hash()));
|
|
|
|
{
|
|
let remove_worst = |s: &mut Self, transaction| {
|
|
match s.remove_worst(&transaction) {
|
|
Err(err) => {
|
|
s.listener.rejected(transaction);
|
|
Err(err)
|
|
},
|
|
Ok(removed) => {
|
|
s.listener.dropped(&removed);
|
|
s.finalize_remove(removed.hash());
|
|
Ok(transaction)
|
|
},
|
|
}
|
|
};
|
|
|
|
while self.by_hash.len() + 1 > self.options.max_count {
|
|
transaction = remove_worst(self, transaction)?;
|
|
}
|
|
|
|
while self.mem_usage + mem_usage > self.options.max_mem_usage {
|
|
transaction = remove_worst(self, transaction)?;
|
|
}
|
|
}
|
|
|
|
let (result, prev_state, current_state) = {
|
|
let transactions = self.transactions.entry(*transaction.sender()).or_insert_with(Transactions::default);
|
|
// get worst and best transactions for comparison
|
|
let prev = transactions.worst_and_best();
|
|
let result = transactions.add(transaction, &self.scoring, self.options.max_per_sender);
|
|
let current = transactions.worst_and_best();
|
|
(result, prev, current)
|
|
};
|
|
|
|
// update best and worst transactions from this sender (if required)
|
|
self.update_senders_worst_and_best(prev_state, current_state);
|
|
|
|
match result {
|
|
AddResult::Ok(tx) => {
|
|
self.listener.added(&tx, None);
|
|
self.finalize_insert(&tx, None);
|
|
Ok(tx)
|
|
},
|
|
AddResult::PushedOut { new, old } |
|
|
AddResult::Replaced { new, old } => {
|
|
self.listener.added(&new, Some(&old));
|
|
self.finalize_insert(&new, Some(&old));
|
|
Ok(new)
|
|
},
|
|
AddResult::TooCheap { new, old } => {
|
|
let hash = *new.hash();
|
|
self.listener.rejected(new);
|
|
bail!(error::ErrorKind::TooCheapToReplace(*old.hash(), hash))
|
|
},
|
|
AddResult::TooCheapToEnter(new) => {
|
|
let hash = *new.hash();
|
|
self.listener.rejected(new);
|
|
bail!(error::ErrorKind::TooCheapToEnter(hash))
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Updates state of the pool statistics if the transaction was added to a set.
|
|
fn finalize_insert(&mut self, new: &Arc<T>, old: Option<&Arc<T>>) {
|
|
self.mem_usage += new.mem_usage();
|
|
self.by_hash.insert(*new.hash(), new.clone());
|
|
|
|
if let Some(old) = old {
|
|
self.finalize_remove(old.hash());
|
|
}
|
|
}
|
|
|
|
/// Updates the pool statistics if transaction was removed.
|
|
fn finalize_remove(&mut self, hash: &H256) -> Option<Arc<T>> {
|
|
self.by_hash.remove(hash).map(|old| {
|
|
self.mem_usage -= old.mem_usage();
|
|
old
|
|
})
|
|
}
|
|
|
|
/// Updates best and worst transactions from a sender.
|
|
fn update_senders_worst_and_best(
|
|
&mut self,
|
|
previous: Option<((S::Score, Arc<T>), (S::Score, Arc<T>))>,
|
|
current: Option<((S::Score, Arc<T>), (S::Score, Arc<T>))>,
|
|
) {
|
|
let worst_collection = &mut self.worst_transactions;
|
|
let best_collection = &mut self.best_transactions;
|
|
|
|
let is_same = |a: &(S::Score, Arc<T>), b: &(S::Score, Arc<T>)| {
|
|
a.0 == b.0 && a.1.hash() == b.1.hash()
|
|
};
|
|
|
|
let update = |collection: &mut BTreeSet<_>, (score, tx), remove| if remove {
|
|
collection.remove(&ScoreWithRef::new(score, tx));
|
|
} else {
|
|
collection.insert(ScoreWithRef::new(score, tx));
|
|
};
|
|
|
|
match (previous, current) {
|
|
(None, Some((worst, best))) => {
|
|
update(worst_collection, worst, false);
|
|
update(best_collection, best, false);
|
|
},
|
|
(Some((worst, best)), None) => {
|
|
// all transactions from that sender has been removed.
|
|
// We can clear a hashmap entry.
|
|
self.transactions.remove(worst.1.sender());
|
|
update(worst_collection, worst, true);
|
|
update(best_collection, best, true);
|
|
},
|
|
(Some((w1, b1)), Some((w2, b2))) => {
|
|
if !is_same(&w1, &w2) {
|
|
update(worst_collection, w1, true);
|
|
update(worst_collection, w2, false);
|
|
}
|
|
if !is_same(&b1, &b2) {
|
|
update(best_collection, b1, true);
|
|
update(best_collection, b2, false);
|
|
}
|
|
},
|
|
(None, None) => {},
|
|
}
|
|
}
|
|
|
|
/// Attempts to remove the worst transaction from the pool if it's worse than the given one.
|
|
fn remove_worst(&mut self, transaction: &T) -> error::Result<Arc<T>> {
|
|
let to_remove = match self.worst_transactions.iter().next_back() {
|
|
// No elements to remove? and the pool is still full?
|
|
None => {
|
|
warn!("The pool is full but there are no transactions to remove.");
|
|
return Err(error::ErrorKind::TooCheapToEnter(*transaction.hash()).into());
|
|
},
|
|
Some(old) => if self.scoring.should_replace(&old.transaction, transaction) {
|
|
// New transaction is better than the worst one so we can replace it.
|
|
old.clone()
|
|
} else {
|
|
// otherwise fail
|
|
return Err(error::ErrorKind::TooCheapToEnter(*transaction.hash()).into())
|
|
},
|
|
};
|
|
|
|
// Remove from transaction set
|
|
self.remove_from_set(to_remove.transaction.sender(), |set, scoring| {
|
|
set.remove(&to_remove.transaction, scoring)
|
|
});
|
|
Ok(to_remove.transaction)
|
|
}
|
|
|
|
/// Removes transaction from sender's transaction `HashMap`.
|
|
fn remove_from_set<R, F: FnOnce(&mut Transactions<T, S>, &S) -> R>(&mut self, sender: &Sender, f: F) -> Option<R> {
|
|
let (prev, next, result) = if let Some(set) = self.transactions.get_mut(sender) {
|
|
let prev = set.worst_and_best();
|
|
let result = f(set, &self.scoring);
|
|
(prev, set.worst_and_best(), result)
|
|
} else {
|
|
return None;
|
|
};
|
|
|
|
self.update_senders_worst_and_best(prev, next);
|
|
Some(result)
|
|
}
|
|
|
|
/// Clears pool from all transactions.
|
|
/// This causes a listener notification that all transactions were dropped.
|
|
/// NOTE: the drop-notification order will be arbitrary.
|
|
pub fn clear(&mut self) {
|
|
self.mem_usage = 0;
|
|
self.transactions.clear();
|
|
self.best_transactions.clear();
|
|
self.worst_transactions.clear();
|
|
|
|
for (_hash, tx) in self.by_hash.drain() {
|
|
self.listener.dropped(&tx)
|
|
}
|
|
}
|
|
|
|
/// Removes single transaction from the pool.
|
|
/// Depending on the `is_invalid` flag the listener
|
|
/// will either get a `cancelled` or `invalid` notification.
|
|
pub fn remove(&mut self, hash: &H256, is_invalid: bool) -> bool {
|
|
if let Some(tx) = self.finalize_remove(hash) {
|
|
self.remove_from_set(tx.sender(), |set, scoring| {
|
|
set.remove(&tx, scoring)
|
|
});
|
|
if is_invalid {
|
|
self.listener.invalid(&tx);
|
|
} else {
|
|
self.listener.cancelled(&tx);
|
|
}
|
|
true
|
|
} else {
|
|
false
|
|
}
|
|
}
|
|
|
|
/// Removes all stalled transactions from given sender.
|
|
fn remove_stalled<R: Ready<T>>(&mut self, sender: &Sender, ready: &mut R) -> usize {
|
|
let removed_from_set = self.remove_from_set(sender, |transactions, scoring| {
|
|
transactions.cull(ready, scoring)
|
|
});
|
|
|
|
match removed_from_set {
|
|
Some(removed) => {
|
|
let len = removed.len();
|
|
for tx in removed {
|
|
self.finalize_remove(tx.hash());
|
|
self.listener.mined(&tx);
|
|
}
|
|
len
|
|
},
|
|
None => 0,
|
|
}
|
|
}
|
|
|
|
/// Removes all stalled transactions from given sender list (or from all senders).
|
|
pub fn cull<R: Ready<T>>(&mut self, senders: Option<&[Sender]>, mut ready: R) -> usize {
|
|
let mut removed = 0;
|
|
match senders {
|
|
Some(senders) => {
|
|
for sender in senders {
|
|
removed += self.remove_stalled(sender, &mut ready);
|
|
}
|
|
},
|
|
None => {
|
|
let senders = self.transactions.keys().cloned().collect::<Vec<_>>();
|
|
for sender in senders {
|
|
removed += self.remove_stalled(&sender, &mut ready);
|
|
}
|
|
},
|
|
}
|
|
|
|
removed
|
|
}
|
|
|
|
/// Returns an iterator of pending (ready) transactions.
|
|
pub fn pending<R: Ready<T>>(&self, ready: R) -> PendingIterator<T, R, S, L> {
|
|
PendingIterator {
|
|
ready,
|
|
best_transactions: self.best_transactions.clone(),
|
|
pool: self,
|
|
}
|
|
}
|
|
|
|
/// Computes the full status of the pool (including readiness).
|
|
pub fn status<R: Ready<T>>(&self, mut ready: R) -> Status {
|
|
let mut status = Status::default();
|
|
|
|
for (_sender, transactions) in &self.transactions {
|
|
let len = transactions.len();
|
|
for (idx, tx) in transactions.iter().enumerate() {
|
|
match ready.is_ready(tx) {
|
|
Readiness::Stalled => status.stalled += 1,
|
|
Readiness::Ready => status.pending += 1,
|
|
Readiness::Future => {
|
|
status.future += len - idx;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
status
|
|
}
|
|
|
|
/// Returns light status of the pool.
|
|
pub fn light_status(&self) -> LightStatus {
|
|
LightStatus {
|
|
mem_usage: self.mem_usage,
|
|
transaction_count: self.by_hash.len(),
|
|
senders: self.transactions.len(),
|
|
}
|
|
}
|
|
}
|
|
|
|
/// An iterator over all pending (ready) transactions.
|
|
/// NOTE: the transactions are not removed from the queue.
|
|
/// You might remove them later by calling `cull`.
|
|
pub struct PendingIterator<'a, T, R, S, L> where
|
|
T: VerifiedTransaction + 'a,
|
|
S: Scoring<T> + 'a,
|
|
L: 'a,
|
|
{
|
|
ready: R,
|
|
best_transactions: BTreeSet<ScoreWithRef<T, S::Score>>,
|
|
pool: &'a Pool<T, S, L>,
|
|
}
|
|
|
|
impl<'a, T, R, S, L> Iterator for PendingIterator<'a, T, R, S, L> where
|
|
T: VerifiedTransaction,
|
|
R: Ready<T>,
|
|
S: Scoring<T>,
|
|
{
|
|
type Item = Arc<T>;
|
|
|
|
fn next(&mut self) -> Option<Self::Item> {
|
|
while !self.best_transactions.is_empty() {
|
|
let best = {
|
|
let best = self.best_transactions.iter().next().expect("current_best is not empty; qed").clone();
|
|
self.best_transactions.take(&best).expect("Just taken from iterator; qed")
|
|
};
|
|
|
|
match self.ready.is_ready(&best.transaction) {
|
|
Readiness::Ready => {
|
|
// retrieve next one from that sender.
|
|
let next = self.pool.transactions
|
|
.get(best.transaction.sender())
|
|
.and_then(|s| s.find_next(&best.transaction, &self.pool.scoring));
|
|
if let Some((score, tx)) = next {
|
|
self.best_transactions.insert(ScoreWithRef::new(score, tx));
|
|
}
|
|
|
|
return Some(best.transaction)
|
|
},
|
|
state => warn!("[{:?}] Ignoring {:?} transaction.", best.transaction.hash(), state),
|
|
}
|
|
}
|
|
|
|
None
|
|
}
|
|
}
|