progress on gossip stuff

beacon_node/lighthouse_network/src/behaviour/gossip_cache.rs

@@ -20,6 +20,8 @@ pub struct GossipCache {
     topic_msgs: HashMap<GossipTopic, HashMap<Vec<u8>, Key>>,
     /// Timeout for blocks.
     beacon_block: Option<Duration>,
+    /// Timeout for blobs.
+    blobs_sidecar: Option<Duration>,
     /// Timeout for aggregate attestations.
     aggregates: Option<Duration>,
     /// Timeout for attestations.
@@ -41,6 +43,8 @@ pub struct GossipCacheBuilder {
     default_timeout: Option<Duration>,
     /// Timeout for blocks.
     beacon_block: Option<Duration>,
+    /// Timeout for blob sidecars.
+    blobs_sidecar: Option<Duration>,
     /// Timeout for aggregate attestations.
     aggregates: Option<Duration>,
     /// Timeout for attestations.
@@ -117,6 +121,7 @@ impl GossipCacheBuilder {
         let GossipCacheBuilder {
             default_timeout,
             beacon_block,
+            blobs_sidecar,
             aggregates,
             attestation,
             voluntary_exit,
@@ -129,6 +134,7 @@ impl GossipCacheBuilder {
             expirations: DelayQueue::default(),
             topic_msgs: HashMap::default(),
             beacon_block: beacon_block.or(default_timeout),
+            blobs_sidecar: blobs_sidecar.or(default_timeout),
             aggregates: aggregates.or(default_timeout),
             attestation: attestation.or(default_timeout),
             voluntary_exit: voluntary_exit.or(default_timeout),
@@ -151,6 +157,7 @@ impl GossipCache {
     pub fn insert(&mut self, topic: GossipTopic, data: Vec<u8>) {
         let expire_timeout = match topic.kind() {
             GossipKind::BeaconBlock => self.beacon_block,
+            GossipKind::BlobsSidecar => self.blobs_sidecar,
             GossipKind::BeaconAggregateAndProof => self.aggregates,
             GossipKind::Attestation(_) => self.attestation,
             GossipKind::VoluntaryExit => self.voluntary_exit,

beacon_node/lighthouse_network/src/types/pubsub.rs

@@ -14,11 +14,14 @@ use types::{
     SignedBeaconBlockMerge, SignedBeaconBlockEip4844, SignedContributionAndProof, SignedVoluntaryExit, SubnetId,
     SyncCommitteeMessage, SyncSubnetId,
 };
+use types::signed_blobs_sidecar::SignedBlobsSidecar;
 
 #[derive(Debug, Clone, PartialEq)]
 pub enum PubsubMessage<T: EthSpec> {
     /// Gossipsub message providing notification of a new block.
     BeaconBlock(Arc<SignedBeaconBlock<T>>),
+    /// Gossipsub message providing notification of a new blobs sidecar.
+    BlobsSidecars(Arc<SignedBlobsSidecar<T>>),
     /// Gossipsub message providing notification of a Aggregate attestation and associated proof.
     AggregateAndProofAttestation(Box<SignedAggregateAndProof<T>>),
     /// Gossipsub message providing notification of a raw un-aggregated attestation with its shard id.
@@ -106,6 +109,7 @@ impl<T: EthSpec> PubsubMessage<T> {
     pub fn kind(&self) -> GossipKind {
         match self {
             PubsubMessage::BeaconBlock(_) => GossipKind::BeaconBlock,
+            PubsubMessage::BlobsSidecars(_) => GossipKind::BlobsSidecar,
             PubsubMessage::AggregateAndProofAttestation(_) => GossipKind::BeaconAggregateAndProof,
             PubsubMessage::Attestation(attestation_data) => {
                 GossipKind::Attestation(attestation_data.0)

beacon_node/lighthouse_network/src/types/topics.rs

@@ -11,6 +11,7 @@ use crate::Subnet;
 pub const TOPIC_PREFIX: &str = "eth2";
 pub const SSZ_SNAPPY_ENCODING_POSTFIX: &str = "ssz_snappy";
 pub const BEACON_BLOCK_TOPIC: &str = "beacon_block";
+pub const BLOBS_SIDECAR_TOPIC: &str = "blobs_sidecar";
 pub const BEACON_AGGREGATE_AND_PROOF_TOPIC: &str = "beacon_aggregate_and_proof";
 pub const BEACON_ATTESTATION_PREFIX: &str = "beacon_attestation_";
 pub const VOLUNTARY_EXIT_TOPIC: &str = "voluntary_exit";
@@ -19,8 +20,9 @@ pub const ATTESTER_SLASHING_TOPIC: &str = "attester_slashing";
 pub const SIGNED_CONTRIBUTION_AND_PROOF_TOPIC: &str = "sync_committee_contribution_and_proof";
 pub const SYNC_COMMITTEE_PREFIX_TOPIC: &str = "sync_committee_";
 
-pub const CORE_TOPICS: [GossipKind; 6] = [
+pub const CORE_TOPICS: [GossipKind; 7] = [
     GossipKind::BeaconBlock,
+    GossipKind::BlobsSidecar,
     GossipKind::BeaconAggregateAndProof,
     GossipKind::VoluntaryExit,
     GossipKind::ProposerSlashing,
@@ -47,6 +49,8 @@ pub struct GossipTopic {
 pub enum GossipKind {
     /// Topic for publishing beacon blocks.
     BeaconBlock,
+    /// Topic for publishing blob sidecars.
+    BlobsSidecar,
     /// Topic for publishing aggregate attestations and proofs.
     BeaconAggregateAndProof,
     /// Topic for publishing raw attestations on a particular subnet.

consensus/types/src/blob.rs

@@ -1,6 +1,7 @@
 use ssz_types::VariableList;
 use serde::{Deserialize, Deserializer, Serialize, Serializer};
 use ssz::{Decode, DecodeError, Encode};
+use tree_hash::TreeHash;
 use crate::test_utils::RngCore;
 use crate::bls_field_element::BlsFieldElement;
 use crate::{EthSpec, Uint256};
@@ -21,3 +22,53 @@ impl <T: EthSpec> TestRandom for Blob<T> {
         res
     }
 }
+
+impl<T: EthSpec> Encode for Blob<T> {
+    fn is_ssz_fixed_len() -> bool {
+        <VariableList<BlsFieldElement, T::FieldElementsPerBlob> as Encode>::is_ssz_fixed_len()
+    }
+
+    fn ssz_fixed_len() -> usize {
+        <VariableList<BlsFieldElement, T::FieldElementsPerBlob> as Encode>::ssz_fixed_len()
+    }
+
+    fn ssz_bytes_len(&self) -> usize {
+        self.0.ssz_bytes_len()
+    }
+
+    fn ssz_append(&self, buf: &mut Vec<u8>) {
+        self.0.ssz_append(buf)
+    }
+}
+
+impl<T: EthSpec> Decode for Blob<T> {
+    fn is_ssz_fixed_len() -> bool {
+        <VariableList<BlsFieldElement, T::FieldElementsPerBlob> as Decode>::is_ssz_fixed_len()
+    }
+
+    fn ssz_fixed_len() -> usize {
+        <VariableList<BlsFieldElement, T::FieldElementsPerBlob> as Decode>::ssz_fixed_len()
+    }
+
+    fn from_ssz_bytes(bytes: &[u8]) -> Result<Self, DecodeError> {
+        <VariableList<BlsFieldElement, T::FieldElementsPerBlob>>::from_ssz_bytes(bytes).map(Self)
+    }
+}
+
+impl<T: EthSpec> TreeHash for Blob<T> {
+    fn tree_hash_type() -> tree_hash::TreeHashType {
+        <VariableList<BlsFieldElement, T::FieldElementsPerBlob>>::tree_hash_type()
+    }
+
+    fn tree_hash_packed_encoding(&self) -> Vec<u8> {
+        self.0.tree_hash_packed_encoding()
+    }
+
+    fn tree_hash_packing_factor() -> usize {
+        <VariableList<BlsFieldElement, T::FieldElementsPerBlob>>::tree_hash_packing_factor()
+    }
+
+    fn tree_hash_root(&self) -> tree_hash::Hash256 {
+        self.0.tree_hash_root()
+    }
+}

consensus/types/src/blobs_sidecar.rs

@@ -0,0 +1,16 @@
+use ssz_types::VariableList;
+use crate::{EthSpec, Hash256, Slot};
+use crate::blob::Blob;
+use crate::kzg_proof::KzgProof;
+use serde::{Serialize, Deserialize};
+use ssz_derive::{Encode, Decode};
+use tree_hash_derive::TreeHash;
+use derivative::Derivative;
+
+#[derive(Debug, Clone, PartialEq, Serialize, Deserialize, Encode, Decode, TreeHash, Derivative)]
+pub struct BlobsSidecar<T: EthSpec> {
+    beacon_block_root: Hash256,
+    beacon_block_slot: Slot,
+    blobs: VariableList<Blob<T>, T::MaxBlobsPerBlock>,
+    kzg_aggregate_proof: KzgProof,
+}

consensus/types/src/bls_field_element.rs

@@ -1,7 +1,59 @@
-use crate::Uint256;
+use crate::{EthSpec, Uint256};
 use serde::{Deserialize, Serialize};
 use ssz::{Decode, DecodeError, Encode};
+use tree_hash::TreeHash;
 
 #[derive(Default, Debug, PartialEq, Hash, Clone, Copy, Serialize, Deserialize)]
 #[serde(transparent)]
 pub struct BlsFieldElement(pub Uint256);
+
+
+impl Encode for BlsFieldElement {
+    fn is_ssz_fixed_len() -> bool {
+        <Uint256 as Encode>::is_ssz_fixed_len()
+    }
+
+    fn ssz_fixed_len() -> usize {
+        <Uint256 as Encode>::ssz_fixed_len()
+    }
+
+    fn ssz_bytes_len(&self) -> usize {
+        self.0.ssz_bytes_len()
+    }
+
+    fn ssz_append(&self, buf: &mut Vec<u8>) {
+        self.0.ssz_append(buf)
+    }
+}
+
+impl Decode for BlsFieldElement {
+    fn is_ssz_fixed_len() -> bool {
+        <Uint256 as Decode>::is_ssz_fixed_len()
+    }
+
+    fn ssz_fixed_len() -> usize {
+        <Uint256 as Decode>::ssz_fixed_len()
+    }
+
+    fn from_ssz_bytes(bytes: &[u8]) -> Result<Self, DecodeError> {
+        <Uint256 as Decode>::from_ssz_bytes(bytes).map(Self)
+    }
+}
+
+impl TreeHash for BlsFieldElement {
+    fn tree_hash_type() -> tree_hash::TreeHashType {
+        <Uint256>::tree_hash_type()
+    }
+
+    fn tree_hash_packed_encoding(&self) -> Vec<u8> {
+        self.0.tree_hash_packed_encoding()
+    }
+
+    fn tree_hash_packing_factor() -> usize {
+        <Uint256>::tree_hash_packing_factor()
+    }
+
+    fn tree_hash_root(&self) -> tree_hash::Hash256 {
+        self.0.tree_hash_root()
+    }
+}

consensus/types/src/lib.rs

@@ -96,6 +96,8 @@ pub mod kzg_commitment;
 pub mod kzg_proof;
 pub mod bls_field_element;
 pub mod blob;
+pub mod signed_blobs_sidecar;
+pub mod blobs_sidecar;
 
 use ethereum_types::{H160, H256};
 

consensus/types/src/signed_blobs_sidecar.rs

@@ -0,0 +1,13 @@
+use bls::Signature;
+use crate::blobs_sidecar::BlobsSidecar;
+use crate::EthSpec;
+use serde::{Serialize, Deserialize};
+use ssz_derive::{Encode, Decode};
+use tree_hash_derive::TreeHash;
+use derivative::Derivative;
+
+#[derive(Debug, Clone, PartialEq, Serialize, Deserialize, Encode, Decode, TreeHash, Derivative)]
+pub struct SignedBlobsSidecar<T: EthSpec> {
+    pub message: BlobsSidecar<T>,
+    pub signature: Signature,
+}