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Remove outdated SPRP hint (#9312)

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While working on this code in another branch I noticed we had this messy, complicated and incorrect code about SPRP (slots-per-restore-point), which is no longer a relevant concept since the introduction of hot state diffs.

In the name of simplicity, I've removed any kind of hinting here in favour of a simple out of bounds error. The benefit of adding complex hinting code (which is not tested) to such a function is not worth it IMO. Users will work it out (or ask) if we just tell them their request is out of bounds.


Co-Authored-By: Michael Sproul <michael@sigmaprime.io>
This commit is contained in:
Michael Sproul
2026-05-19 11:35:31 +10:00
committed by GitHub
parent 1a68631180
commit fd0852a8e5
1 changed files with 27 additions and 47 deletions
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74
beacon_node/http_api/src/beacon/states.rs
View File

@@ -390,54 +390,34 @@ pub fn get_beacon_state_committees<T: BeaconChainTypes>(
if let Some(shuffling) = maybe_cached_shuffling {
shuffling
} else {
let possibly_built_cache =
match RelativeEpoch::from_epoch(current_epoch, epoch) {
Ok(relative_epoch)
if state.committee_cache_is_initialized(
relative_epoch,
) =>
{
state.committee_cache(relative_epoch).cloned()
}
_ => CommitteeCache::initialized(
state,
epoch,
&chain.spec,
),
let possibly_built_cache = match RelativeEpoch::from_epoch(
current_epoch,
epoch,
) {
Ok(relative_epoch)
if state.committee_cache_is_initialized(
relative_epoch,
) =>
{
state.committee_cache(relative_epoch).cloned()
}
.map_err(
|e| match e {
BeaconStateError::EpochOutOfBounds => {
let max_sprp =
T::EthSpec::slots_per_historical_root()
as u64;
let first_subsequent_restore_point_slot =
((epoch.start_slot(
T::EthSpec::slots_per_epoch(),
) / max_sprp)
+ 1)
* max_sprp;
if epoch < current_epoch {
warp_utils::reject::custom_bad_request(
format!(
"epoch out of bounds, \
try state at slot {}",
first_subsequent_restore_point_slot,
),
)
} else {
warp_utils::reject::custom_bad_request(
"epoch out of bounds, \
too far in future"
.into(),
)
}
}
_ => warp_utils::reject::unhandled_error(
BeaconChainError::from(e),
),
},
)?;
_ => CommitteeCache::initialized(
state,
epoch,
&chain.spec,
),
}
.map_err(|e| match e {
BeaconStateError::EpochOutOfBounds => {
warp_utils::reject::custom_bad_request(format!(
"epoch {} out of bounds for state at {}",
epoch, current_epoch
))
}
_ => warp_utils::reject::unhandled_error(
BeaconChainError::from(e),
),
})?;
// Attempt to write to the beacon cache (only if the cache
// size is not the default value).