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Implement /eth/v1/beacon/blobs endpoint (#8103)

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* #8085


  


Co-Authored-By: Tan Chee Keong <tanck@sigmaprime.io>

Co-Authored-By: chonghe <44791194+chong-he@users.noreply.github.com>
This commit is contained in:
chonghe
2025-10-09 13:01:30 +08:00
committed by GitHub
parent 8e382ceed9
commit 3110ca325b
10 changed files with 346 additions and 41 deletions
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32
beacon_node/beacon_chain/src/kzg_utils.rs
View File

@@ -299,6 +299,8 @@ pub(crate) fn build_data_column_sidecars<E: EthSpec>(
///
/// If `blob_indices_opt` is `None`, this function attempts to reconstruct all blobs associated
/// with the block.
/// This function does NOT use rayon as this is primarily used by a non critical path in HTTP API
/// and it will be slow if the node needs to reconstruct the blobs
pub fn reconstruct_blobs<E: EthSpec>(
kzg: &Kzg,
data_columns: &[Arc<DataColumnSidecar<E>>],
@@ -320,7 +322,7 @@ pub fn reconstruct_blobs<E: EthSpec>(
};
let blob_sidecars = blob_indices
.into_par_iter()
.into_iter()
.map(|row_index| {
let mut cells: Vec<KzgCellRef> = vec![];
let mut cell_ids: Vec<u64> = vec![];
@@ -337,16 +339,26 @@ pub fn reconstruct_blobs<E: EthSpec>(
cell_ids.push(data_column.index);
}
let (cells, _kzg_proofs) = kzg
.recover_cells_and_compute_kzg_proofs(&cell_ids, &cells)
.map_err(|e| format!("Failed to recover cells and compute KZG proofs: {e:?}"))?;
let num_cells_original_blob = E::number_of_columns() / 2;
let blob_bytes = if data_columns.len() < E::number_of_columns() {
let (recovered_cells, _kzg_proofs) = kzg
.recover_cells_and_compute_kzg_proofs(&cell_ids, &cells)
.map_err(|e| {
format!("Failed to recover cells and compute KZG proofs: {e:?}")
})?;
let num_cells_original_blob = cells.len() / 2;
let blob_bytes = cells
.into_iter()
.take(num_cells_original_blob)
.flat_map(|cell| cell.into_iter())
.collect();
recovered_cells
.into_iter()
.take(num_cells_original_blob)
.flat_map(|cell| cell.into_iter())
.collect()
} else {
cells
.into_iter()
.take(num_cells_original_blob)
.flat_map(|cell| (*cell).into_iter())
.collect()
};
let blob = Blob::<E>::new(blob_bytes).map_err(|e| format!("{e:?}"))?;
let kzg_proof = KzgProof::empty();