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Taking expected nonce from state into consideration when removing txs

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This commit is contained in:
Tomasz Drwięga 2016-03-04 16:09:05 +01:00
parent b320ff4602
commit 677c3996b9
1 changed files with 35 additions and 44 deletions
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79
sync/src/transaction_queue.rs
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@ -34,13 +34,18 @@ struct TransactionOrder {
}
impl TransactionOrder {
pub fn for_transaction(tx: &VerifiedTransaction, base_nonce: U256) -> Self {
fn for_transaction(tx: &VerifiedTransaction, base_nonce: U256) -> Self {
TransactionOrder {
nonce_height: tx.nonce() - base_nonce,
gas_price: tx.transaction.gas_price,
hash: tx.hash(),
}
}
fn update_height(mut self, nonce: U256, base_nonce: U256) -> Self {
self.nonce_height = nonce - base_nonce;
self
}
}
impl Eq for TransactionOrder {}
@ -235,6 +240,7 @@ impl TransactionQueue {
let sender = transaction.sender();
let nonce = transaction.nonce();
println!("Removing tx: {:?}", transaction.transaction);
// Remove from future
self.future.drop(&sender, &nonce);
@ -244,51 +250,35 @@ impl TransactionQueue {
return;
}
// Are there any other transactions from this sender?
if !self.current.by_address.has_row(&sender) {
// Clear last & first nonces
self.last_nonces.remove(&sender);
return;
}
// Let's remove transactions where tx.nonce < current_nonce
// and if there are any future transactions matching current_nonce+1 - move to current
let current_nonce = fetch_nonce(&sender);
// We will either move transaction to future or remove it completely
// so there will be no transactions from this sender in current
self.last_nonces.remove(&sender);
// Let's find those with higher nonce that should be moved to future (TODO [todr] optimize?)
let to_move_to_future = {
let row_map = self.current.by_address.row(&sender).unwrap();
let mut to_future = Vec::new();
let mut highest = U256::zero();
let mut lowest = nonce.clone();
// Search nonces to remove and track lowest and highest
for (current_nonce, _) in row_map.iter() {
if current_nonce > &nonce {
to_future.push(current_nonce.clone());
} else if current_nonce > &highest {
highest = current_nonce.clone();
} else if current_nonce < &lowest {
lowest = current_nonce.clone();
}
}
// Update last_nonces
if highest == U256::zero() {
self.last_nonces.remove(&sender);
} else {
self.last_nonces.insert(sender.clone(), highest);
}
to_future
let all_nonces_from_sender = match self.current.by_address.row(&sender) {
Some(row_map) => row_map.keys().cloned().collect::<Vec<U256>>(),
None => vec![],
};
// Move to future
for k in to_move_to_future {
if let Some(v) = self.current.drop(&sender, &k) {
// TODO [todr] Recalculate height?
self.future.insert(sender.clone(), k, v);
for k in all_nonces_from_sender {
// Goes to future or is removed
let order = self.current.drop(&sender, &k).unwrap();
if k >= current_nonce {
println!("Moving to future: {:?}", order);
self.future.insert(sender.clone(), k, order.update_height(k, current_nonce));
} else {
self.by_hash.remove(&order.hash);
}
}
self.future.enforce_limit(&self.by_hash);
// But maybe some transactions
// And now lets check if there is some chain of transactions in future
// that should be placed in current
if let Some(new_current_top) = self.move_future_txs(sender.clone(), current_nonce - U256::one(), current_nonce) {
self.last_nonces.insert(sender, new_current_top);
}
}
/// Returns top transactions from the queue
@ -310,6 +300,7 @@ impl TransactionQueue {
}
fn move_future_txs(&mut self, address: Address, current_nonce: U256, first_nonce: U256) -> Option<U256> {
println!("Moving from future for: {:?} base: {:?}", current_nonce, first_nonce);
let mut current_nonce = current_nonce + U256::one();
{
let by_nonce = self.future.by_address.row_mut(&address);
@ -321,9 +312,9 @@ impl TransactionQueue {
// remove also from priority and hash
self.future.by_priority.remove(&order);
// Put to current
let transaction = self.by_hash.get(&order.hash).expect("TransactionQueue Inconsistency");
let order = TransactionOrder::for_transaction(transaction, first_nonce);
self.current.insert(address.clone(), transaction.nonce(), order);
println!("Moved: {:?}", order);
let order = order.update_height(current_nonce.clone(), first_nonce);
self.current.insert(address.clone(), current_nonce, order);
current_nonce = current_nonce + U256::one();
}
}
@ -340,9 +331,9 @@ impl TransactionQueue {
let next_nonce = self.last_nonces
.get(&address)
.cloned()
.map(|n| n + U256::one())
.unwrap_or_else(|| fetch_nonce(&address));
.map_or_else(|| fetch_nonce(&address), |n| n + U256::one());
println!("Expected next: {:?}, got: {:?}", next_nonce, nonce);
// Check height
if nonce > next_nonce {
let order = TransactionOrder::for_transaction(&tx, next_nonce);