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fix re delegate (#6603)

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This commit is contained in:
Rob Walker
2019-10-29 14:42:45 -07:00
committed by GitHub
parent 489dc657c6
commit a587d05098
6 changed files with 209 additions and 205 deletions
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3
book/src/cluster/stake-delegation-and-rewards.md
View File

@ -94,7 +94,7 @@ The Stakes and the RewardsPool are accounts that are owned by the same `Stake` p
### StakeInstruction::DelegateStake ### StakeInstruction::DelegateStake
The Stake account is moved from Ininitialized to StakeState::Stake form. This is how stakers choose their initial delegate validator node and activate their stake account lamports. If the stake account is already StakeState::Stake \(i.e. already activated\), the stake is re-delegated The transaction must be signed by the stake's `authorized_staker`. The Stake account is moved from Ininitialized to StakeState::Stake form. This is how stakers choose their initial delegate validator node and activate their stake account lamports. The transaction must be signed by the stake's `authorized_staker`. If the stake account is already StakeState::Stake \(i.e. already activated\), the stake is re-delegated. Stakes may be re-delegated at any time, and updated stakes are reflected immediately, but only one re-delegation is permitted per epoch.
* `account[0]` - RW - The StakeState::Stake instance. `StakeState::Stake::credits_observed` is initialized to `VoteState::credits`, `StakeState::Stake::voter_pubkey` is initialized to `account[1]`. If this is the initial delegation of stake, `StakeState::Stake::stake` is initialized to the account's balance in lamports, `StakeState::Stake::activated` is initialized to the current Bank epoch, and `StakeState::Stake::deactivated` is initialized to std::u64::MAX * `account[0]` - RW - The StakeState::Stake instance. `StakeState::Stake::credits_observed` is initialized to `VoteState::credits`, `StakeState::Stake::voter_pubkey` is initialized to `account[1]`. If this is the initial delegation of stake, `StakeState::Stake::stake` is initialized to the account's balance in lamports, `StakeState::Stake::activated` is initialized to the current Bank epoch, and `StakeState::Stake::deactivated` is initialized to std::u64::MAX
* `account[1]` - R - The VoteState instance. * `account[1]` - R - The VoteState instance.
@ -229,4 +229,3 @@ Only lamports in excess of effective+activating stake may be withdrawn at any ti
### Lock-up ### Lock-up
Stake accounts support the notion of lock-up, wherein the stake account balance is unavailable for withdrawal until a specified time. Lock-up is specified as a slot height, i.e. the minimum slot height that must be reached by the network before the stake account balance is available for withdrawal, except to a specified custodian. This information is gathered when the stake account is created. Stake accounts support the notion of lock-up, wherein the stake account balance is unavailable for withdrawal until a specified time. Lock-up is specified as a slot height, i.e. the minimum slot height that must be reached by the network before the stake account balance is available for withdrawal, except to a specified custodian. This information is gathered when the stake account is created.

3
book/src/running-validator/validator-stake.md
View File

@ -19,7 +19,7 @@ $ solana delegate-stake ~/validator-config/stake-keypair.json ~/validator-vote-k
Note that stakes need to warm up, and warmup increments are applied at Epoch boundaries, so it can take an hour or more for the change to fully take effect. Note that stakes need to warm up, and warmup increments are applied at Epoch boundaries, so it can take an hour or more for the change to fully take effect.
Stakes can be re-delegated to another node at any time with the same command: Stakes can be re-delegated to another node at any time with the same command, but only one re-delegation is permitted per epoch:
```bash ```bash
$ solana delegate-stake ~/validator-config/stake-keypair.json ~/some-other-validator-vote-keypair.json $ solana delegate-stake ~/validator-config/stake-keypair.json ~/some-other-validator-vote-keypair.json
@ -44,4 +44,3 @@ The stake will cool down, deactivate over time. While cooling down, your stake w
Note that a stake account may only be used once, so after deactivation, use the cli's `withdraw-stake` command to recover the previously staked lamports. Note that a stake account may only be used once, so after deactivation, use the cli's `withdraw-stake` command to recover the previously staked lamports.
Be sure and redeem your credits before withdrawing all your lamports. Once the account is fully withdrawn, the account is destroyed. Be sure and redeem your credits before withdrawing all your lamports. Once the account is fully withdrawn, the account is destroyed.

270
programs/bpf/Cargo.lock generated
View File

@ -80,7 +80,7 @@ dependencies = [
"cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)", "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
"libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)", "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
"rustc-demangle 0.1.16 (registry+https://github.com/rust-lang/crates.io-index)", "rustc-demangle 0.1.16 (registry+https://github.com/rust-lang/crates.io-index)",
"serde 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)", "serde 1.0.102 (registry+https://github.com/rust-lang/crates.io-index)",
] ]
[[package]] [[package]]
@ -107,7 +107,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [ dependencies = [
"autocfg 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)", "autocfg 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
"byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)", "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
"serde 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)", "serde 1.0.102 (registry+https://github.com/rust-lang/crates.io-index)",
] ]
[[package]] [[package]]
@ -177,7 +177,7 @@ version = "0.11.0"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [ dependencies = [
"feature-probe 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)", "feature-probe 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
"serde 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)", "serde 1.0.102 (registry+https://github.com/rust-lang/crates.io-index)",
] ]
[[package]] [[package]]
@ -251,7 +251,7 @@ dependencies = [
"libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)", "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
"num-integer 0.1.41 (registry+https://github.com/rust-lang/crates.io-index)", "num-integer 0.1.41 (registry+https://github.com/rust-lang/crates.io-index)",
"num-traits 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)", "num-traits 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
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"time 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)", "time 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
] ]
@ -322,7 +322,7 @@ dependencies = [
"idna 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)", "idna 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
"log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)", "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
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"try_from 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)", "try_from 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
@ -611,7 +611,7 @@ name = "generic-array"
version = "0.13.2" version = "0.13.2"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [ dependencies = [
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"typenum 1.11.2 (registry+https://github.com/rust-lang/crates.io-index)", "typenum 1.11.2 (registry+https://github.com/rust-lang/crates.io-index)",
] ]
@ -791,7 +791,7 @@ dependencies = [
[[package]] [[package]]
name = "itertools" name = "itertools"
version = "0.8.0" version = "0.8.1"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [ dependencies = [
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@ -1359,7 +1359,7 @@ dependencies = [
"mime 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)", "mime 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
"mime_guess 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)", "mime_guess 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
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@ -1466,10 +1466,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]] [[package]]
name = "serde" name = "serde"
version = "1.0.101" version = "1.0.102"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [ dependencies = [
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[[package]] [[package]]
@ -1477,12 +1477,12 @@ name = "serde_bytes"
version = "0.11.2" version = "0.11.2"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [ dependencies = [
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name = "serde_derive" name = "serde_derive"
version = "1.0.101" version = "1.0.102"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [ dependencies = [
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@ -1497,7 +1497,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [ dependencies = [
"itoa 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)", "itoa 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
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@ -1507,7 +1507,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [ dependencies = [
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@ -1545,165 +1545,165 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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"checksum serde_bytes 0.11.2 (registry+https://github.com/rust-lang/crates.io-index)" = "45af0182ff64abaeea290235eb67da3825a576c5d53e642c4d5b652e12e6effc" "checksum serde_bytes 0.11.2 (registry+https://github.com/rust-lang/crates.io-index)" = "45af0182ff64abaeea290235eb67da3825a576c5d53e642c4d5b652e12e6effc"
"checksum serde_derive 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)" = "4b133a43a1ecd55d4086bd5b4dc6c1751c68b1bfbeba7a5040442022c7e7c02e" "checksum serde_derive 1.0.102 (registry+https://github.com/rust-lang/crates.io-index)" = "ca13fc1a832f793322228923fbb3aba9f3f44444898f835d31ad1b74fa0a2bf8"
"checksum serde_json 1.0.41 (registry+https://github.com/rust-lang/crates.io-index)" = "2f72eb2a68a7dc3f9a691bfda9305a1c017a6215e5a4545c258500d2099a37c2" "checksum serde_json 1.0.41 (registry+https://github.com/rust-lang/crates.io-index)" = "2f72eb2a68a7dc3f9a691bfda9305a1c017a6215e5a4545c258500d2099a37c2"
"checksum serde_urlencoded 0.5.5 (registry+https://github.com/rust-lang/crates.io-index)" = "642dd69105886af2efd227f75a520ec9b44a820d65bc133a9131f7d229fd165a" "checksum serde_urlencoded 0.5.5 (registry+https://github.com/rust-lang/crates.io-index)" = "642dd69105886af2efd227f75a520ec9b44a820d65bc133a9131f7d229fd165a"
"checksum sha2 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)" = "9eb6be24e4c23a84d7184280d2722f7f2731fcdd4a9d886efbfe4413e4847ea0" "checksum sha2 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)" = "9eb6be24e4c23a84d7184280d2722f7f2731fcdd4a9d886efbfe4413e4847ea0"

4
programs/stake_api/src/stake_instruction.rs
View File

@ -20,6 +20,7 @@ pub enum StakeError {
NoCreditsToRedeem, NoCreditsToRedeem,
LockupInForce, LockupInForce,
AlreadyDeactivated, AlreadyDeactivated,
TooSoonToRedelegate,
} }
impl<E> DecodeError<E> for StakeError { impl<E> DecodeError<E> for StakeError {
fn type_of() -> &'static str { fn type_of() -> &'static str {
@ -32,6 +33,9 @@ impl std::fmt::Display for StakeError {
StakeError::NoCreditsToRedeem => write!(f, "not enough credits to redeem"), StakeError::NoCreditsToRedeem => write!(f, "not enough credits to redeem"),
StakeError::LockupInForce => write!(f, "lockup has not yet expired"), StakeError::LockupInForce => write!(f, "lockup has not yet expired"),
StakeError::AlreadyDeactivated => write!(f, "stake already deactivated"), StakeError::AlreadyDeactivated => write!(f, "stake already deactivated"),
StakeError::TooSoonToRedelegate => {
write!(f, "only one redelegation permitted per epoch")
}
} }
} }
} }

120
programs/stake_api/src/stake_state.rs
View File

@ -103,7 +103,7 @@ pub struct Stake {
pub config: Config, pub config: Config,
/// history of prior delegates and the epoch ranges for which /// history of prior delegates and the epoch ranges for which
/// they were set, circular buffer /// they were set, circular buffer
pub prior_delegates: [(Pubkey, Epoch, Epoch); MAX_PRIOR_DELEGATES], pub prior_delegates: [(Pubkey, Epoch, Epoch, Slot); MAX_PRIOR_DELEGATES],
/// next pointer /// next pointer
pub prior_delegates_idx: usize, pub prior_delegates_idx: usize,
} }
@ -120,7 +120,7 @@ impl Default for Stake {
activation_epoch: 0, activation_epoch: 0,
deactivation_epoch: std::u64::MAX, deactivation_epoch: std::u64::MAX,
config: Config::default(), config: Config::default(),
prior_delegates: <[(Pubkey, Epoch, Epoch); MAX_PRIOR_DELEGATES]>::default(), prior_delegates: <[(Pubkey, Epoch, Epoch, Slot); MAX_PRIOR_DELEGATES]>::default(),
prior_delegates_idx: MAX_PRIOR_DELEGATES - 1, prior_delegates_idx: MAX_PRIOR_DELEGATES - 1,
} }
} }
@ -169,17 +169,6 @@ impl Stake {
self.stake_activating_and_deactivating(epoch, history).0 self.stake_activating_and_deactivating(epoch, history).0
} }
pub fn voter_pubkey(&self, epoch: Epoch) -> &Pubkey {
let prior_delegate_pubkey = &self.prior_delegates[self.prior_delegates_idx].0;
// next epoch from re-delegation, or no redelegations
if epoch > self.voter_pubkey_epoch || *prior_delegate_pubkey == Pubkey::default() {
&self.voter_pubkey
} else {
assert!(epoch <= self.prior_delegates[self.prior_delegates_idx].2);
prior_delegate_pubkey
}
}
fn stake_activating_and_deactivating( fn stake_activating_and_deactivating(
&self, &self,
epoch: Epoch, epoch: Epoch,
@ -362,18 +351,26 @@ impl Stake {
&mut self, &mut self,
voter_pubkey: &Pubkey, voter_pubkey: &Pubkey,
vote_state: &VoteState, vote_state: &VoteState,
epoch: Epoch, clock: &sysvar::clock::Clock,
) -> Result<(), StakeError> { ) -> Result<(), StakeError> {
// remember old delegate, // only one re-delegation supported per epoch
if epoch != self.voter_pubkey_epoch { if self.voter_pubkey_epoch == clock.epoch {
return Err(StakeError::TooSoonToRedelegate);
}
// remember prior delegate and when we switched, to support later slashing
self.prior_delegates_idx += 1; self.prior_delegates_idx += 1;
self.prior_delegates_idx %= MAX_PRIOR_DELEGATES; self.prior_delegates_idx %= MAX_PRIOR_DELEGATES;
self.prior_delegates[self.prior_delegates_idx] = self.prior_delegates[self.prior_delegates_idx] = (
(self.voter_pubkey, self.voter_pubkey_epoch, epoch); self.voter_pubkey,
} self.voter_pubkey_epoch,
clock.epoch,
clock.slot,
);
self.voter_pubkey = *voter_pubkey; self.voter_pubkey = *voter_pubkey;
self.voter_pubkey_epoch = epoch; self.voter_pubkey_epoch = clock.epoch;
self.credits_observed = vote_state.credits(); self.credits_observed = vote_state.credits();
Ok(()) Ok(())
} }
@ -500,11 +497,7 @@ impl<'a> StakeAccount for KeyedAccount<'a> {
self.set_state(&StakeState::Stake(authorized, lockup, stake)) self.set_state(&StakeState::Stake(authorized, lockup, stake))
} else if let StakeState::Stake(authorized, lockup, mut stake) = self.state()? { } else if let StakeState::Stake(authorized, lockup, mut stake) = self.state()? {
authorized.check(signers, StakeAuthorize::Staker)?; authorized.check(signers, StakeAuthorize::Staker)?;
stake.redelegate( stake.redelegate(vote_account.unsigned_key(), &vote_account.state()?, &clock)?;
vote_account.unsigned_key(),
&vote_account.state()?,
clock.epoch,
)?;
self.set_state(&StakeState::Stake(authorized, lockup, stake)) self.set_state(&StakeState::Stake(authorized, lockup, stake))
} else { } else {
Err(InstructionError::InvalidAccountData) Err(InstructionError::InvalidAccountData)
@ -711,7 +704,7 @@ mod tests {
#[test] #[test]
fn test_stake_delegate_stake() { fn test_stake_delegate_stake() {
let clock = sysvar::clock::Clock { let mut clock = sysvar::clock::Clock {
epoch: 1, epoch: 1,
..sysvar::clock::Clock::default() ..sysvar::clock::Clock::default()
}; };
@ -792,12 +785,18 @@ mod tests {
..Stake::default() ..Stake::default()
} }
); );
// verify that delegate_stake can be called twice, 2nd is redelegate
assert_eq!(
stake_keyed_account.delegate_stake(
&vote_keyed_account,
&clock,
&Config::default(),
&signers
),
Err(StakeError::TooSoonToRedelegate.into())
);
// verify that voter_pubkey() is right for all epochs, even ones that don't count (like 0) clock.epoch += 1;
for epoch in 0..=clock.epoch + 1 {
assert_eq!(stake.voter_pubkey(epoch), &vote_pubkey);
}
// verify that delegate_stake can be called twice, 2nd is redelegate // verify that delegate_stake can be called twice, 2nd is redelegate
assert!(stake_keyed_account assert!(stake_keyed_account
.delegate_stake(&vote_keyed_account, &clock, &Config::default(), &signers) .delegate_stake(&vote_keyed_account, &clock, &Config::default(), &signers)
@ -820,33 +819,34 @@ mod tests {
voter_pubkey_epoch: 0, voter_pubkey_epoch: 0,
..Stake::default() ..Stake::default()
}; };
// verify that redelegation any number of times since first delegation works just fine, // verify that redelegation works when epoch is changing, that
// and that the stake is delegated to the most recent vote account // wraparound works, and that the stake is delegated
for epoch in 0..=MAX_PRIOR_DELEGATES + 1 { // to the most recent vote account
for epoch in 1..=MAX_PRIOR_DELEGATES + 2 {
let voter_pubkey = Pubkey::new_rand(); let voter_pubkey = Pubkey::new_rand();
let _ignored = stake.redelegate(&voter_pubkey, &VoteState::default(), 0); assert_eq!(
assert_eq!(stake.voter_pubkey(epoch as u64), &voter_pubkey); stake.redelegate(
} &voter_pubkey,
&VoteState::default(),
// get a new voter_pubkey &sysvar::clock::Clock {
let voter_pubkey = Pubkey::new_rand(); epoch: epoch as u64,
// save off old voter_pubkey ..sysvar::clock::Clock::default()
let prior_voter_pubkey = stake.voter_pubkey; },
),
// actually redelegate in epoch 1 Ok(())
let _ignored = stake.redelegate(&voter_pubkey, &VoteState::default(), 1); );
// verify that delegation is delayed assert_eq!(
assert_eq!(stake.voter_pubkey(0 as u64), &prior_voter_pubkey); stake.redelegate(
assert_eq!(stake.voter_pubkey(1 as u64), &prior_voter_pubkey); &voter_pubkey,
assert_eq!(stake.voter_pubkey(2 as u64), &voter_pubkey); &VoteState::default(),
&sysvar::clock::Clock {
// verify that prior_delegates wraps around safely... epoch: epoch as u64,
for epoch in 0..=MAX_PRIOR_DELEGATES + 1 { ..sysvar::clock::Clock::default()
let voter_pubkey = Pubkey::new_rand(); },
let prior_voter_pubkey = stake.voter_pubkey; ),
let _ignored = stake.redelegate(&voter_pubkey, &VoteState::default(), epoch as u64); Err(StakeError::TooSoonToRedelegate)
assert_eq!(stake.voter_pubkey(epoch as u64), &prior_voter_pubkey); );
assert_eq!(stake.voter_pubkey((epoch + 1) as u64), &voter_pubkey); assert_eq!(stake.voter_pubkey, voter_pubkey);
} }
} }
@ -1908,7 +1908,7 @@ mod tests {
) )
.expect("stake_account"); .expect("stake_account");
let clock = sysvar::clock::Clock::default(); let mut clock = sysvar::clock::Clock::default();
let vote_pubkey = Pubkey::new_rand(); let vote_pubkey = Pubkey::new_rand();
let mut vote_account = let mut vote_account =
@ -1943,6 +1943,8 @@ mod tests {
KeyedAccount::new(&new_voter_pubkey, false, &mut new_vote_account); KeyedAccount::new(&new_voter_pubkey, false, &mut new_vote_account);
new_vote_keyed_account.set_state(&vote_state).unwrap(); new_vote_keyed_account.set_state(&vote_state).unwrap();
// time passes, so we can re-delegate
clock.epoch += 1;
// Random other account should fail // Random other account should fail
assert_eq!( assert_eq!(
stake_keyed_account.delegate_stake( stake_keyed_account.delegate_stake(
@ -1966,7 +1968,7 @@ mod tests {
Ok(()) Ok(())
); );
let stake = StakeState::stake_from(&stake_keyed_account.account).unwrap(); let stake = StakeState::stake_from(&stake_keyed_account.account).unwrap();
assert_eq!(stake.voter_pubkey(0), &new_voter_pubkey); assert_eq!(stake.voter_pubkey, new_voter_pubkey);
// Test another staking action // Test another staking action
assert_eq!( assert_eq!(

6
runtime/src/stakes.rs
View File

@ -85,7 +85,7 @@ impl Stakes {
.iter() .iter()
.map(|(_, stake_account)| { .map(|(_, stake_account)| {
StakeState::stake_from(stake_account).map_or(0, |stake| { StakeState::stake_from(stake_account).map_or(0, |stake| {
if stake.voter_pubkey(epoch) == voter_pubkey { if &stake.voter_pubkey == voter_pubkey {
stake.stake(epoch, stake_history) stake.stake(epoch, stake_history)
} else { } else {
0 0
@ -129,7 +129,7 @@ impl Stakes {
let old_stake = self.stake_accounts.get(pubkey).and_then(|old_account| { let old_stake = self.stake_accounts.get(pubkey).and_then(|old_account| {
StakeState::stake_from(old_account).map(|stake| { StakeState::stake_from(old_account).map(|stake| {
( (
*stake.voter_pubkey(self.epoch), stake.voter_pubkey,
stake.stake(self.epoch, Some(&self.stake_history)), stake.stake(self.epoch, Some(&self.stake_history)),
) )
}) })
@ -137,7 +137,7 @@ impl Stakes {
let stake = StakeState::stake_from(account).map(|stake| { let stake = StakeState::stake_from(account).map(|stake| {
( (
*stake.voter_pubkey(self.epoch), stake.voter_pubkey,
if account.lamports != 0 { if account.lamports != 0 {
stake.stake(self.epoch, Some(&self.stake_history)) stake.stake(self.epoch, Some(&self.stake_history))
} else { } else {