sync tx blobs

consensus/types/src/blob_wrapper.rs

@@ -1,14 +1,27 @@
 use crate::{Blob, EthSpec, Hash256, SignedBeaconBlock, Slot};
 use serde_derive::{Deserialize, Serialize};
-use ssz_derive::Encode;
+use ssz_derive::{Encode, Decode};
 use ssz_types::VariableList;
 use tree_hash::TreeHash;
 use tree_hash_derive::TreeHash;
+use ssz::{Decode, Encode};
 
 #[cfg_attr(feature = "arbitrary-fuzz", derive(arbitrary::Arbitrary))]
-#[derive(Debug, Clone, Serialize, Deserialize, Encode, TreeHash)]
+#[derive(Debug, Clone, Serialize, Deserialize, Encode, Decode, TreeHash, PartialEq, Default)]
 pub struct BlobWrapper<E: EthSpec> {
     pub beacon_block_root: Hash256,
     pub beacon_block_slot: Slot,
     pub blobs: VariableList<Blob<E::ChunksPerBlob>, E::MaxObjectListSize>,
 }
+
+impl <E: EthSpec> BlobWrapper<E> {
+    pub fn empty() -> Self {
+        Self::default()
+    }
+    pub fn max_size() -> usize {
+        // Fixed part
+        Self::empty().as_ssz_bytes().len()
+            // Max size of variable length `blobs` field
+            + (E::max_object_list_size() * <Blob<E::ChunksPerBlob> as Encode>::ssz_fixed_len())
+    }
+}

consensus/types/src/eth_spec.rs

@@ -227,6 +227,14 @@ pub trait EthSpec: 'static + Default + Sync + Send + Clone + Debug + PartialEq +
     fn bytes_per_logs_bloom() -> usize {
         Self::BytesPerLogsBloom::to_usize()
     }
+
+    fn max_object_list_size() -> usize {
+        Self::MaxObjectListSize::to_usize()
+    }
+
+    fn chunks_per_blob() -> usize {
+        Self::ChunksPerBlob::to_usize()
+    }
 }
 
 /// Macro to inherit some type values from another EthSpec.

consensus/types/src/lib.rs

@@ -169,6 +169,7 @@ pub use crate::validator_registration_data::*;
 pub use crate::validator_subscription::ValidatorSubscription;
 pub use crate::voluntary_exit::VoluntaryExit;
 use serde_big_array::BigArray;
+pub use crate::blob_wrapper::BlobWrapper;
 
 pub type CommitteeIndex = u64;
 pub type Hash256 = H256;