core/txpool/blobpool: fix getblobs error handling (ethereum#32538)

Another getBlobs PR on top of
ethereum#32190 to avoid some minor
regressions.

- bring back more log messages from before
- continue processing also on some internal errors
- ensure v2 complies with spec even if there are internal errors

---------

Signed-off-by: Csaba Kiraly <[email protected]>
Co-authored-by: rjl493456442 <[email protected]>

Author: cskiraly

core/txpool/blobpool/blobpool.go

@@ -1334,17 +1334,20 @@ func (p *BlobPool) GetBlobs(vhashes []common.Hash, version byte) ([]*kzg4844.Blo
 		}
 		data, err := p.store.Get(txID)
 		if err != nil {
-			return nil, nil, nil, err
+			log.Error("Tracked blob transaction missing from store", "id", txID, "err", err)
+			continue
 		}
 
 		// Decode the blob transaction
 		tx := new(types.Transaction)
 		if err := rlp.DecodeBytes(data, tx); err != nil {
-			return nil, nil, nil, err
+			log.Error("Blobs corrupted for traced transaction", "id", txID, "err", err)
+			continue
 		}
 		sidecar := tx.BlobTxSidecar()
 		if sidecar == nil {
-			return nil, nil, nil, fmt.Errorf("blob tx without sidecar %x", tx.Hash())
+			log.Error("Blob tx without sidecar", "hash", tx.Hash(), "id", txID)
+			continue
 		}
 		// Traverse the blobs in the transaction
 		for i, hash := range tx.BlobHashes() {

eth/catalyst/api.go

@@ -541,20 +541,23 @@ func (api *ConsensusAPI) GetBlobsV2(hashes []common.Hash) ([]*engine.BlobAndProo
 		getBlobsV2RequestMiss.Inc(1)
 		return nil, nil
 	}
-	getBlobsV2RequestHit.Inc(1)
 
 	blobs, _, proofs, err := api.eth.BlobTxPool().GetBlobs(hashes, types.BlobSidecarVersion1)
 	if err != nil {
 		return nil, engine.InvalidParams.With(err)
 	}
-	res := make([]*engine.BlobAndProofV2, len(hashes))
-	for i := 0; i < len(blobs); i++ {
-		// the blob is missing, return null as response. It should
-		// be caught by `AvailableBlobs` though, perhaps data race
-		// occurs between two calls.
-		if blobs[i] == nil {
+
+	// To comply with API spec, check again that we really got all data needed
+	for _, blob := range blobs {
+		if blob == nil {
+			getBlobsV2RequestMiss.Inc(1)
 			return nil, nil
 		}
+	}
+	getBlobsV2RequestHit.Inc(1)
+
+	res := make([]*engine.BlobAndProofV2, len(hashes))
+	for i := 0; i < len(blobs); i++ {
 		var cellProofs []hexutil.Bytes
 		for _, proof := range proofs[i] {
 			cellProofs = append(cellProofs, proof[:])