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Don't reset credits_observed due to stale voters (#13836) 

* Don't reset credits_observed due to stale voters

* Add tests

* Fix comment
This commit is contained in:
Ryo Onodera 2020-11-30 22:47:34 +09:00 committed by GitHub
parent aa78fa0647
commit e81c2c826c
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1 changed files with 34 additions and 3 deletions
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37
programs/stake/src/stake_state.rs
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@ -553,7 +553,7 @@ impl Stake {
/// for a given stake and vote_state, calculate how many
/// points were earned (credits * stake) and new value
/// for credits_observed were the points paid
pub fn calculate_points_and_credits(
fn calculate_points_and_credits(
&self,
new_vote_state: &VoteState,
stake_history: Option<&StakeHistory>,
@ -562,7 +562,11 @@ impl Stake {
) -> (u128, u64) {
// if there is no newer credits since observed, return no point
if new_vote_state.credits() <= self.credits_observed {
return (0, 0);
if fix_stake_deactivate {
return (0, self.credits_observed);
} else {
return (0, 0);
}
}
let mut points = 0;
@ -3435,7 +3439,7 @@ mod tests {
);
// now one with inflation disabled. no one gets paid, but we still need
// to advance the stake state's observed_credits field to prevent back-
// to advance the stake state's credits_observed field to prevent back-
// paying rewards when inflation is turned on.
assert_eq!(
Some((0, 0, 4)),
@ -3450,6 +3454,33 @@ mod tests {
true,
)
);
// credits_observed remains at previous level when vote_state credits are
// not advancing and inflation is disabled
stake.credits_observed = 4;
assert_eq!(
Some((0, 0, 4)),
stake.calculate_rewards(
&PointValue {
rewards: 0,
points: 4
},
&vote_state,
None,
&mut null_tracer(),
true,
)
);
// assert the previous behavior is preserved where fix_stake_deactivate=false
assert_eq!(
(0, 0),
stake.calculate_points_and_credits(&vote_state, None, &mut null_tracer(), false)
);
assert_eq!(
(0, 4),
stake.calculate_points_and_credits(&vote_state, None, &mut null_tracer(), true)
);
}
#[test]