add HTTP API to retrieve validator IL duties

consensus/types/src/beacon_state.rs

@@ -812,7 +812,7 @@ impl<E: EthSpec> BeaconState<E> {
     /// Returns the inclusion list committee for the given `slot` in the current or next epoch.
     ///
     /// Spec v0.12.1
-    pub fn get_inclusion_list_commitee(
+    pub fn get_inclusion_list_committee(
         &self,
         slot: Slot,
         spec: &ChainSpec,
@@ -1721,6 +1721,21 @@ impl<E: EthSpec> BeaconState<E> {
         Ok(cache.get_attestation_duties(validator_index))
     }
 
+    pub fn get_inclusion_list_duties(
+        &self,
+        validator_index: usize,
+        epoch: Epoch,
+        spec: &ChainSpec,
+    ) -> Result<Option<InclusionListDuty>, Error> {
+        for slot in epoch.slot_iter(E::slots_per_epoch()) {
+            let committee = self.get_inclusion_list_committee(slot, spec)?;
+            if committee.contains(&validator_index) {
+                return Ok(Some(InclusionListDuty { slot }));
+            }
+        }
+        Ok(None)
+    }
+
     /// Compute the total active balance cache from scratch.
     ///
     /// This method should rarely be invoked because single-pass epoch processing keeps the total

consensus/types/src/inclusion_list_duty.rs

@@ -0,0 +1,8 @@
+use crate::*;
+use serde::{Deserialize, Serialize};
+
+#[derive(arbitrary::Arbitrary, Debug, PartialEq, Clone, Copy, Default, Serialize, Deserialize)]
+pub struct InclusionListDuty {
+    /// The slot during which the validator must produce an inclusion list.
+    pub slot: Slot,
+}

consensus/types/src/lib.rs

@@ -49,6 +49,7 @@ pub mod graffiti;
 pub mod historical_batch;
 pub mod historical_summary;
 pub mod inclusion_list;
+pub mod inclusion_list_duty;
 pub mod indexed_attestation;
 pub mod light_client_bootstrap;
 pub mod light_client_finality_update;
@@ -180,6 +181,7 @@ pub use crate::fork_versioned_response::{ForkVersionDeserialize, ForkVersionedRe
 pub use crate::graffiti::{Graffiti, GRAFFITI_BYTES_LEN};
 pub use crate::historical_batch::HistoricalBatch;
 pub use crate::inclusion_list::{InclusionList, SignedInclusionList};
+pub use crate::inclusion_list_duty::InclusionListDuty;
 pub use crate::indexed_attestation::{
     IndexedAttestation, IndexedAttestationBase, IndexedAttestationElectra, IndexedAttestationRef,
 };