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Make proposer duties work pre-genesis #4789

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Jul 23, 2024
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Make proposer duties work pre-genesis #4789

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21 changes: 15 additions & 6 deletions beacon_node/http_api/src/proposer_duties.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -22,7 +22,10 @@ pub fn proposer_duties<T: BeaconChainTypes>(
log: &Logger,
) -> Result<ApiDuties, warp::reject::Rejection> {
let current_epoch = chain
.epoch()
.slot_clock
.now_or_genesis()
.map(|slot| slot.epoch(T::EthSpec::slots_per_epoch()))
.ok_or(BeaconChainError::UnableToReadSlot)
.map_err(warp_utils::reject::beacon_chain_error)?;

// Determine what the current epoch would be if we fast-forward our system clock by
Expand All @@ -31,11 +34,17 @@ pub fn proposer_duties<T: BeaconChainTypes>(
// Most of the time, `tolerant_current_epoch` will be equal to `current_epoch`. However, during
// the first `MAXIMUM_GOSSIP_CLOCK_DISPARITY` duration of the epoch `tolerant_current_epoch`
// will equal `current_epoch + 1`
let tolerant_current_epoch = chain
.slot_clock
.now_with_future_tolerance(chain.spec.maximum_gossip_clock_disparity())
.ok_or_else(|| warp_utils::reject::custom_server_error("unable to read slot clock".into()))?
.epoch(T::EthSpec::slots_per_epoch());
let tolerant_current_epoch = if chain.slot_clock.is_prior_to_genesis().unwrap_or(true) {
current_epoch
} else {
chain
.slot_clock
.now_with_future_tolerance(chain.spec.maximum_gossip_clock_disparity())
.ok_or_else(|| {
warp_utils::reject::custom_server_error("unable to read slot clock".into())
})?
.epoch(T::EthSpec::slots_per_epoch())
};

if request_epoch == current_epoch || request_epoch == tolerant_current_epoch {
// If we could consider ourselves in the `request_epoch` when allowing for clock disparity
Expand Down