Gloas process epoch

consensus/state_processing/src/per_epoch_processing/single_pass.rs

@@ -32,6 +32,7 @@ pub struct SinglePassConfig {
     pub pending_consolidations: bool,
     pub effective_balance_updates: bool,
     pub proposer_lookahead: bool,
+    pub builder_pending_payments: bool,
 }
 
 impl Default for SinglePassConfig {
@@ -51,6 +52,7 @@ impl SinglePassConfig {
             pending_consolidations: true,
             effective_balance_updates: true,
             proposer_lookahead: true,
+            builder_pending_payments: true,
         }
     }
 
@@ -64,6 +66,7 @@ impl SinglePassConfig {
             pending_consolidations: false,
             effective_balance_updates: false,
             proposer_lookahead: false,
+            builder_pending_payments: false,
         }
     }
 }
@@ -469,10 +472,14 @@ pub fn process_epoch_single_pass<E: EthSpec>(
         process_proposer_lookahead(state, spec)?;
     }
 
+    if conf.builder_pending_payments && fork_name.gloas_enabled() {
+        process_builder_pending_payments(state, spec)?;
+    }
+
     Ok(summary)
 }
 
-// TOOO(EIP-7917): use balances cache
+// TODO(EIP-7917): use balances cache
 pub fn process_proposer_lookahead<E: EthSpec>(
     state: &mut BeaconState<E>,
     spec: &ChainSpec,
@@ -502,6 +509,69 @@ pub fn process_proposer_lookahead<E: EthSpec>(
     Ok(())
 }
 
+/// Calculate the quorum threshold for builder payments based on total active balance.
+pub fn get_builder_payment_quorum_threshold<E: EthSpec>(
+    state: &BeaconState<E>,
+    spec: &ChainSpec,
+) -> Result<u64, Error> {
+    let total_active_balance = state.get_total_active_balance()?;
+
+    let quorum = total_active_balance
+        .safe_div(E::slots_per_epoch())?
+        .safe_mul(spec.builder_payment_threshold_numerator)?;
+
+    quorum
+        .safe_div(spec.builder_payment_threshold_denominator)
+        .map_err(Error::from)
+}
+
+/// Process builder pending payments, moving qualifying payments to withdrawals.
+/// TODO(EIP-7732): Add EF consensus-spec tests for `process_builder_pending_payments`
+/// Currently blocked by EF consensus-spec-tests for Gloas not yet integrated.
+pub fn process_builder_pending_payments<E: EthSpec>(
+    state: &mut BeaconState<E>,
+    spec: &ChainSpec,
+) -> Result<(), Error> {
+    let quorum = get_builder_payment_quorum_threshold(state, spec)?;
+
+    // Collect qualifying payments
+    let qualifying_payments = state
+        .builder_pending_payments()?
+        .iter()
+        .take(E::slots_per_epoch() as usize)
+        .filter(|payment| payment.weight > quorum)
+        .cloned()
+        .collect::<Vec<_>>();
+
+    // Update `builder_pending_withdrawals` with qualifying `builder_pending_payments`
+    qualifying_payments
+        .into_iter()
+        .try_for_each(|payment| -> Result<(), Error> {
+            let exit_queue_epoch =
+                state.compute_exit_epoch_and_update_churn(payment.withdrawal.amount, spec)?;
+            let withdrawable_epoch =
+                exit_queue_epoch.safe_add(spec.min_validator_withdrawability_delay)?;
+
+            let mut withdrawal = payment.withdrawal.clone();
+            withdrawal.withdrawable_epoch = withdrawable_epoch;
+            state.builder_pending_withdrawals_mut()?.push(withdrawal)?;
+            Ok(())
+        })?;
+
+    // Move remaining `builder_pending_payments` to start of list and set the rest to default
+    let new_payments = state
+        .builder_pending_payments()?
+        .iter()
+        .skip(E::slots_per_epoch() as usize)
+        .cloned()
+        .chain((0..E::slots_per_epoch() as usize).map(|_| types::BuilderPendingPayment::default()))
+        .collect::<Vec<_>>();
+
+    *state.builder_pending_payments_mut()? = Vector::new(new_payments)?;
+
+    Ok(())
+}
+
 fn process_single_inactivity_update(
     inactivity_score: &mut Cow<u64>,
     validator_info: &ValidatorInfo,

consensus/state_processing/src/per_slot_processing.rs

@@ -13,6 +13,7 @@ pub enum Error {
     EpochProcessingError(EpochProcessingError),
     ArithError(ArithError),
     InconsistentStateFork(InconsistentFork),
+    BitfieldError(ssz::BitfieldError),
 }
 
 impl From<ArithError> for Error {
@@ -21,6 +22,12 @@ impl From<ArithError> for Error {
     }
 }
 
+impl From<ssz::BitfieldError> for Error {
+    fn from(e: ssz::BitfieldError) -> Self {
+        Self::BitfieldError(e)
+    }
+}
+
 /// Advances a state forward by one slot, performing per-epoch processing if required.
 ///
 /// If the root of the supplied `state` is known, then it can be passed as `state_root`. If
@@ -49,6 +56,18 @@ pub fn per_slot_processing<E: EthSpec>(
 
     state.slot_mut().safe_add_assign(1)?;
 
+    // Unset the next payload availability
+    if state.fork_name_unchecked().gloas_enabled() {
+        let next_slot_index = state
+            .slot()
+            .as_usize()
+            .safe_add(1)?
+            .safe_rem(E::slots_per_historical_root())?;
+        state
+            .execution_payload_availability_mut()?
+            .set(next_slot_index, false)?;
+    }
+
     // Process fork upgrades here. Note that multiple upgrades can potentially run
     // in sequence if they are scheduled in the same Epoch (common in testnets)
     if state.slot().safe_rem(E::slots_per_epoch())? == 0 {