Add Fulu boilerplate

Makefile

@@ -30,7 +30,7 @@ PROFILE ?= release
 
 # List of all hard forks. This list is used to set env variables for several tests so that
 # they run for different forks.
-FORKS=phase0 altair bellatrix capella deneb electra
+FORKS=phase0 altair bellatrix capella deneb electra fulu
 
 # Extra flags for Cargo
 CARGO_INSTALL_EXTRA_FLAGS?=

beacon_node/beacon_chain/src/attestation_rewards.rs

@@ -51,13 +51,10 @@ impl<T: BeaconChainTypes> BeaconChain<T> {
             .get_state(&state_root, Some(state_slot))?
             .ok_or(BeaconChainError::MissingBeaconState(state_root))?;
 
-        match state {
-            BeaconState::Base(_) => self.compute_attestation_rewards_base(state, validators),
-            BeaconState::Altair(_)
-            | BeaconState::Bellatrix(_)
-            | BeaconState::Capella(_)
-            | BeaconState::Deneb(_)
-            | BeaconState::Electra(_) => self.compute_attestation_rewards_altair(state, validators),
+        if state.fork_name_unchecked().altair_enabled() {
+            self.compute_attestation_rewards_altair(state, validators)
+        } else {
+            self.compute_attestation_rewards_base(state, validators)
         }
     }
 

beacon_node/beacon_chain/src/beacon_block_streamer.rs

@@ -15,7 +15,7 @@ use types::{
 };
 use types::{
     ExecutionPayload, ExecutionPayloadBellatrix, ExecutionPayloadCapella, ExecutionPayloadElectra,
-    ExecutionPayloadHeader,
+    ExecutionPayloadFulu, ExecutionPayloadHeader,
 };
 
 #[derive(PartialEq)]
@@ -99,6 +99,7 @@ fn reconstruct_default_header_block<E: EthSpec>(
         ForkName::Capella => ExecutionPayloadCapella::default().into(),
         ForkName::Deneb => ExecutionPayloadDeneb::default().into(),
         ForkName::Electra => ExecutionPayloadElectra::default().into(),
+        ForkName::Fulu => ExecutionPayloadFulu::default().into(),
         ForkName::Base | ForkName::Altair => {
             return Err(Error::PayloadReconstruction(format!(
                 "Block with fork variant {} has execution payload",
@@ -742,13 +743,14 @@ mod tests {
     }
 
     #[tokio::test]
-    async fn check_all_blocks_from_altair_to_electra() {
+    async fn check_all_blocks_from_altair_to_fulu() {
         let slots_per_epoch = MinimalEthSpec::slots_per_epoch() as usize;
-        let num_epochs = 10;
+        let num_epochs = 12;
         let bellatrix_fork_epoch = 2usize;
         let capella_fork_epoch = 4usize;
         let deneb_fork_epoch = 6usize;
         let electra_fork_epoch = 8usize;
+        let fulu_fork_epoch = 10usize;
         let num_blocks_produced = num_epochs * slots_per_epoch;
 
         let mut spec = test_spec::<MinimalEthSpec>();
@@ -757,6 +759,7 @@ mod tests {
         spec.capella_fork_epoch = Some(Epoch::new(capella_fork_epoch as u64));
         spec.deneb_fork_epoch = Some(Epoch::new(deneb_fork_epoch as u64));
         spec.electra_fork_epoch = Some(Epoch::new(electra_fork_epoch as u64));
+        spec.fulu_fork_epoch = Some(Epoch::new(fulu_fork_epoch as u64));
         let spec = Arc::new(spec);
 
         let harness = get_harness(VALIDATOR_COUNT, spec.clone());

beacon_node/beacon_chain/src/beacon_chain.rs

@@ -5317,23 +5317,19 @@ impl<T: BeaconChainTypes> BeaconChain<T> {
 
         // If required, start the process of loading an execution payload from the EL early. This
         // allows it to run concurrently with things like attestation packing.
-        let prepare_payload_handle = match &state {
-            BeaconState::Base(_) | BeaconState::Altair(_) => None,
-            BeaconState::Bellatrix(_)
-            | BeaconState::Capella(_)
-            | BeaconState::Deneb(_)
-            | BeaconState::Electra(_) => {
-                let prepare_payload_handle = get_execution_payload(
-                    self.clone(),
-                    &state,
-                    parent_root,
-                    proposer_index,
-                    builder_params,
-                    builder_boost_factor,
-                    block_production_version,
-                )?;
-                Some(prepare_payload_handle)
-            }
+        let prepare_payload_handle = if state.fork_name_unchecked().bellatrix_enabled() {
+            let prepare_payload_handle = get_execution_payload(
+                self.clone(),
+                &state,
+                parent_root,
+                proposer_index,
+                builder_params,
+                builder_boost_factor,
+                block_production_version,
+            )?;
+            Some(prepare_payload_handle)
+        } else {
+            None
         };
 
         let (mut proposer_slashings, mut attester_slashings, mut voluntary_exits) =
@@ -5751,6 +5747,48 @@ impl<T: BeaconChainTypes> BeaconChain<T> {
                     execution_payload_value,
                 )
             }
+            BeaconState::Fulu(_) => {
+                let (
+                    payload,
+                    kzg_commitments,
+                    maybe_blobs_and_proofs,
+                    maybe_requests,
+                    execution_payload_value,
+                ) = block_contents
+                    .ok_or(BlockProductionError::MissingExecutionPayload)?
+                    .deconstruct();
+
+                (
+                    BeaconBlock::Fulu(BeaconBlockFulu {
+                        slot,
+                        proposer_index,
+                        parent_root,
+                        state_root: Hash256::zero(),
+                        body: BeaconBlockBodyFulu {
+                            randao_reveal,
+                            eth1_data,
+                            graffiti,
+                            proposer_slashings: proposer_slashings.into(),
+                            attester_slashings: attester_slashings_electra.into(),
+                            attestations: attestations_electra.into(),
+                            deposits: deposits.into(),
+                            voluntary_exits: voluntary_exits.into(),
+                            sync_aggregate: sync_aggregate
+                                .ok_or(BlockProductionError::MissingSyncAggregate)?,
+                            execution_payload: payload
+                                .try_into()
+                                .map_err(|_| BlockProductionError::InvalidPayloadFork)?,
+                            bls_to_execution_changes: bls_to_execution_changes.into(),
+                            blob_kzg_commitments: kzg_commitments
+                                .ok_or(BlockProductionError::InvalidPayloadFork)?,
+                            execution_requests: maybe_requests
+                                .ok_or(BlockProductionError::MissingExecutionRequests)?,
+                        },
+                    }),
+                    maybe_blobs_and_proofs,
+                    execution_payload_value,
+                )
+            }
         };
 
         let block = SignedBeaconBlock::from_block(

beacon_node/beacon_chain/src/execution_payload.rs

@@ -374,19 +374,15 @@ pub fn get_execution_payload<T: BeaconChainTypes>(
     let latest_execution_payload_header = state.latest_execution_payload_header()?;
     let latest_execution_payload_header_block_hash = latest_execution_payload_header.block_hash();
     let latest_execution_payload_header_gas_limit = latest_execution_payload_header.gas_limit();
-    let withdrawals = match state {
-        &BeaconState::Capella(_) | &BeaconState::Deneb(_) | &BeaconState::Electra(_) => {
-            Some(get_expected_withdrawals(state, spec)?.0.into())
-        }
-        &BeaconState::Bellatrix(_) => None,
-        // These shouldn't happen but they're here to make the pattern irrefutable
-        &BeaconState::Base(_) | &BeaconState::Altair(_) => None,
+    let withdrawals = if state.fork_name_unchecked().capella_enabled() {
+        Some(get_expected_withdrawals(state, spec)?.0.into())
+    } else {
+        None
     };
-    let parent_beacon_block_root = match state {
-        BeaconState::Deneb(_) | BeaconState::Electra(_) => Some(parent_block_root),
-        BeaconState::Bellatrix(_) | BeaconState::Capella(_) => None,
-        // These shouldn't happen but they're here to make the pattern irrefutable
-        BeaconState::Base(_) | BeaconState::Altair(_) => None,
+    let parent_beacon_block_root = if state.fork_name_unchecked().deneb_enabled() {
+        Some(parent_block_root)
+    } else {
+        None
     };
 
     // Spawn a task to obtain the execution payload from the EL via a series of async calls. The

beacon_node/beacon_chain/src/fulu_readiness.rs

@@ -0,0 +1,114 @@
+//! Provides tools for checking if a node is ready for the Fulu upgrade.
+
+use crate::{BeaconChain, BeaconChainTypes};
+use execution_layer::http::{ENGINE_GET_PAYLOAD_V5, ENGINE_NEW_PAYLOAD_V5};
+use serde::{Deserialize, Serialize};
+use std::fmt;
+use std::time::Duration;
+use types::*;
+
+/// The time before the Fulu fork when we will start issuing warnings about preparation.
+use super::bellatrix_readiness::SECONDS_IN_A_WEEK;
+pub const FULU_READINESS_PREPARATION_SECONDS: u64 = SECONDS_IN_A_WEEK * 2;
+pub const ENGINE_CAPABILITIES_REFRESH_INTERVAL: u64 = 300;
+
+#[derive(Debug, Serialize, Deserialize)]
+#[serde(rename_all = "snake_case")]
+#[serde(tag = "type")]
+pub enum FuluReadiness {
+    /// The execution engine is fulu-enabled (as far as we can tell)
+    Ready,
+    /// We are connected to an execution engine which doesn't support the V5 engine api methods
+    V5MethodsNotSupported { error: String },
+    /// The transition configuration with the EL failed, there might be a problem with
+    /// connectivity, authentication or a difference in configuration.
+    ExchangeCapabilitiesFailed { error: String },
+    /// The user has not configured an execution endpoint
+    NoExecutionEndpoint,
+}
+
+impl fmt::Display for FuluReadiness {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            FuluReadiness::Ready => {
+                write!(f, "This node appears ready for Fulu.")
+            }
+            FuluReadiness::ExchangeCapabilitiesFailed { error } => write!(
+                f,
+                "Could not exchange capabilities with the \
+                    execution endpoint: {}",
+                error
+            ),
+            FuluReadiness::NoExecutionEndpoint => write!(
+                f,
+                "The --execution-endpoint flag is not specified, this is a \
+                    requirement post-merge"
+            ),
+            FuluReadiness::V5MethodsNotSupported { error } => write!(
+                f,
+                "Execution endpoint does not support Fulu methods: {}",
+                error
+            ),
+        }
+    }
+}
+
+impl<T: BeaconChainTypes> BeaconChain<T> {
+    /// Returns `true` if fulu epoch is set and Fulu fork has occurred or will
+    /// occur within `FULU_READINESS_PREPARATION_SECONDS`
+    pub fn is_time_to_prepare_for_fulu(&self, current_slot: Slot) -> bool {
+        if let Some(fulu_epoch) = self.spec.fulu_fork_epoch {
+            let fulu_slot = fulu_epoch.start_slot(T::EthSpec::slots_per_epoch());
+            let fulu_readiness_preparation_slots =
+                FULU_READINESS_PREPARATION_SECONDS / self.spec.seconds_per_slot;
+            // Return `true` if Fulu has happened or is within the preparation time.
+            current_slot + fulu_readiness_preparation_slots > fulu_slot
+        } else {
+            // The Fulu fork epoch has not been defined yet, no need to prepare.
+            false
+        }
+    }
+
+    /// Attempts to connect to the EL and confirm that it is ready for fulu.
+    pub async fn check_fulu_readiness(&self) -> FuluReadiness {
+        if let Some(el) = self.execution_layer.as_ref() {
+            match el
+                .get_engine_capabilities(Some(Duration::from_secs(
+                    ENGINE_CAPABILITIES_REFRESH_INTERVAL,
+                )))
+                .await
+            {
+                Err(e) => {
+                    // The EL was either unreachable or responded with an error
+                    FuluReadiness::ExchangeCapabilitiesFailed {
+                        error: format!("{:?}", e),
+                    }
+                }
+                Ok(capabilities) => {
+                    let mut missing_methods = String::from("Required Methods Unsupported:");
+                    let mut all_good = true;
+                    if !capabilities.get_payload_v5 {
+                        missing_methods.push(' ');
+                        missing_methods.push_str(ENGINE_GET_PAYLOAD_V5);
+                        all_good = false;
+                    }
+                    if !capabilities.new_payload_v5 {
+                        missing_methods.push(' ');
+                        missing_methods.push_str(ENGINE_NEW_PAYLOAD_V5);
+                        all_good = false;
+                    }
+
+                    if all_good {
+                        FuluReadiness::Ready
+                    } else {
+                        FuluReadiness::V5MethodsNotSupported {
+                            error: missing_methods,
+                        }
+                    }
+                }
+            }
+        } else {
+            FuluReadiness::NoExecutionEndpoint
+        }
+    }
+}

beacon_node/beacon_chain/src/lib.rs

@@ -31,6 +31,7 @@ pub mod execution_payload;
 pub mod fetch_blobs;
 pub mod fork_choice_signal;
 pub mod fork_revert;
+pub mod fulu_readiness;
 pub mod graffiti_calculator;
 mod head_tracker;
 pub mod historical_blocks;