Offer a way to get the leader_schedule from any Bank instance
This commit is contained in:
@ -100,6 +100,9 @@ pub struct Bank {
|
||||
|
||||
/// The number of slots in each epoch.
|
||||
slots_per_epoch: u64,
|
||||
|
||||
// The number of slots until the next leader schedule activates.
|
||||
leader_schedule_offset: u64,
|
||||
}
|
||||
|
||||
impl Default for Bank {
|
||||
@ -112,6 +115,7 @@ impl Default for Bank {
|
||||
hash: RwLock::<Hash>::default(),
|
||||
ticks_per_slot: DEFAULT_TICKS_PER_SLOT,
|
||||
slots_per_epoch: DEFAULT_SLOTS_PER_EPOCH,
|
||||
leader_schedule_offset: DEFAULT_SLOTS_PER_EPOCH,
|
||||
}
|
||||
}
|
||||
}
|
||||
@ -128,6 +132,10 @@ impl Bank {
|
||||
pub fn new_from_parent(parent: &Arc<Bank>) -> Self {
|
||||
let mut bank = Self::default();
|
||||
bank.last_id_queue = RwLock::new(parent.last_id_queue.read().unwrap().clone());
|
||||
bank.ticks_per_slot = parent.ticks_per_slot;
|
||||
bank.slots_per_epoch = parent.slots_per_epoch;
|
||||
bank.leader_schedule_offset = parent.leader_schedule_offset;
|
||||
|
||||
bank.parent = Some(parent.clone());
|
||||
if *parent.hash.read().unwrap() == Hash::default() {
|
||||
*parent.hash.write().unwrap() = parent.hash_internal_state();
|
||||
@ -665,6 +673,21 @@ impl Bank {
|
||||
self.slots_per_epoch
|
||||
}
|
||||
|
||||
/// Return the number of slots until the next leader schedule activates.
|
||||
pub fn leader_schedule_offset(&self) -> u64 {
|
||||
self.leader_schedule_offset
|
||||
}
|
||||
|
||||
/// Return the checkpointed bank that should be used to generate a leader schedule.
|
||||
/// Return None if a sufficiently old bank checkpoint doesn't exist.
|
||||
pub fn leader_schedule_bank(&self) -> Option<Arc<Bank>> {
|
||||
let epoch_slot_height = self.slot_height() - self.slot_index();
|
||||
let expected = epoch_slot_height.saturating_sub(self.leader_schedule_offset);
|
||||
self.parents()
|
||||
.into_iter()
|
||||
.find(|bank| bank.slot_height() <= expected)
|
||||
}
|
||||
|
||||
/// Return the number of ticks since genesis.
|
||||
pub fn tick_height(&self) -> u64 {
|
||||
self.last_id_queue.read().unwrap().tick_height
|
||||
@ -997,6 +1020,25 @@ mod tests {
|
||||
assert_eq!(register_ticks(&bank, ticks_per_epoch), (0, 1, 1));
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_leader_schedule_bank() {
|
||||
let (genesis_block, _) = GenesisBlock::new(5);
|
||||
let bank = Bank::new(&genesis_block);
|
||||
assert!(bank.leader_schedule_bank().is_none());
|
||||
|
||||
let bank = Bank::new_from_parent(&Arc::new(bank));
|
||||
let ticks_per_offset = bank.leader_schedule_offset() * bank.ticks_per_slot();
|
||||
register_ticks(&bank, ticks_per_offset);
|
||||
assert_eq!(bank.slot_height(), bank.leader_schedule_offset());
|
||||
|
||||
let slot_height = bank.slots_per_epoch() - bank.leader_schedule_offset();
|
||||
let bank = Bank::new_from_parent(&Arc::new(bank));
|
||||
assert_eq!(
|
||||
bank.leader_schedule_bank().unwrap().slot_height(),
|
||||
slot_height
|
||||
);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_interleaving_locks() {
|
||||
let (genesis_block, mint_keypair) = GenesisBlock::new(3);
|
||||
|
@ -29,11 +29,15 @@ impl LeaderSchedule {
|
||||
Self { slot_leaders }
|
||||
}
|
||||
|
||||
pub fn new_with_bank(bank: &Bank, len: u64) -> Self {
|
||||
pub fn new_with_bank(bank: &Bank) -> Self {
|
||||
let active_stakers = ActiveStakers::new(&bank);
|
||||
let mut seed = [0u8; 32];
|
||||
seed.copy_from_slice(bank.last_id().as_ref());
|
||||
Self::new(&active_stakers.sorted_stakes(), &seed, len)
|
||||
Self::new(
|
||||
&active_stakers.sorted_stakes(),
|
||||
&seed,
|
||||
bank.slots_per_epoch(),
|
||||
)
|
||||
}
|
||||
}
|
||||
|
||||
@ -44,11 +48,26 @@ impl Index<usize> for LeaderSchedule {
|
||||
}
|
||||
}
|
||||
|
||||
trait LeaderScheduleUtil {
|
||||
/// Return the leader schedule for the current epoch.
|
||||
fn leader_schedule(&self) -> LeaderSchedule;
|
||||
}
|
||||
|
||||
impl LeaderScheduleUtil for Bank {
|
||||
fn leader_schedule(&self) -> LeaderSchedule {
|
||||
match self.leader_schedule_bank() {
|
||||
None => LeaderSchedule::new_with_bank(self),
|
||||
Some(bank) => LeaderSchedule::new_with_bank(&bank),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod tests {
|
||||
use super::*;
|
||||
use solana_sdk::genesis_block::GenesisBlock;
|
||||
use solana_sdk::signature::{Keypair, KeypairUtil};
|
||||
use std::iter;
|
||||
|
||||
#[test]
|
||||
fn test_leader_schedule_index() {
|
||||
@ -85,7 +104,10 @@ mod tests {
|
||||
let pubkey = Keypair::new().pubkey();
|
||||
let (genesis_block, _mint_keypair) = GenesisBlock::new_with_leader(2, pubkey, 2);
|
||||
let bank = Bank::new(&genesis_block);
|
||||
let leader_schedule = LeaderSchedule::new_with_bank(&bank, 2);
|
||||
assert_eq!(leader_schedule.slot_leaders, vec![pubkey, pubkey]);
|
||||
let leader_schedule = LeaderSchedule::new_with_bank(&bank);
|
||||
let len = bank.slots_per_epoch() as usize;
|
||||
let expected: Vec<_> = iter::repeat(pubkey).take(len).collect();
|
||||
assert_eq!(leader_schedule.slot_leaders, expected);
|
||||
assert_eq!(bank.leader_schedule().slot_leaders, expected); // Same thing, but with the trait
|
||||
}
|
||||
}
|
||||
|
Reference in New Issue
Block a user