blob production

consensus/types/src/blobs_sidecar.rs

@@ -1,5 +1,5 @@
 use crate::kzg_proof::KzgProof;
-use crate::{Blob, EthSpec, Hash256, Slot};
+use crate::{BeaconBlock, Blob, EthSpec, Hash256, SignedRoot, Slot};
 use serde_derive::{Deserialize, Serialize};
 use ssz::Encode;
 use ssz_derive::{Decode, Encode};
@@ -9,14 +9,17 @@ use tree_hash_derive::TreeHash;
 
 #[cfg_attr(feature = "arbitrary-fuzz", derive(arbitrary::Arbitrary))]
 #[derive(Debug, Clone, Serialize, Deserialize, Encode, Decode, TreeHash, PartialEq, Default)]
-pub struct BlobsSidecar<E: EthSpec> {
+#[serde(bound = "T: EthSpec")]
+pub struct BlobsSidecar<T: EthSpec> {
     pub beacon_block_root: Hash256,
     pub beacon_block_slot: Slot,
-    pub blobs: VariableList<Blob<E>, E::MaxBlobsPerBlock>,
+    pub blobs: VariableList<Blob<T>, T::MaxBlobsPerBlock>,
     pub kzg_aggregate_proof: KzgProof,
 }
 
-impl<E: EthSpec> BlobsSidecar<E> {
+impl<T: EthSpec> SignedRoot for BlobsSidecar<T> {}
+
+impl<T: EthSpec> BlobsSidecar<T> {
     pub fn empty() -> Self {
         Self::default()
     }
@@ -24,6 +27,6 @@ impl<E: EthSpec> BlobsSidecar<E> {
         // Fixed part
         Self::empty().as_ssz_bytes().len()
             // Max size of variable length `blobs` field
-            + (E::max_blobs_per_block() * <Blob<E> as Encode>::ssz_fixed_len())
+            + (T::max_blobs_per_block() * <Blob<T> as Encode>::ssz_fixed_len())
     }
 }

consensus/types/src/signed_blobs_sidecar.rs

@@ -8,7 +8,17 @@ use tree_hash_derive::TreeHash;
 
 #[cfg_attr(feature = "arbitrary-fuzz", derive(arbitrary::Arbitrary))]
 #[derive(Debug, Clone, Serialize, Deserialize, Encode, Decode, TreeHash, PartialEq)]
-pub struct SignedBlobsSidecar<E: EthSpec> {
-    pub message: BlobsSidecar<E>,
+#[serde(bound = "T: EthSpec")]
+pub struct SignedBlobsSidecar<T: EthSpec> {
+    pub message: BlobsSidecar<T>,
     pub signature: Signature,
 }
+
+impl<T: EthSpec> SignedBlobsSidecar<T> {
+    pub fn from_blob(blob: BlobsSidecar<T>, signature: Signature) -> Self {
+        Self {
+            message: blob,
+            signature,
+        }
+    }
+}