fix(blob clients): nil pointer with unexpected blob client response (#1195)

* fix nil pointer with unexpected blob client response

* chore: auto version bump [bot]

Author: jonastheis

params/version.go

@@ -24,7 +24,7 @@ import (
 const (
 	VersionMajor = 5         // Major version component of the current release
 	VersionMinor = 8         // Minor version component of the current release
-	VersionPatch = 51        // Patch version component of the current release
+	VersionPatch = 52        // Patch version component of the current release
 	VersionMeta  = "mainnet" // Version metadata to append to the version string
 )
 

rollup/da_syncer/blob_client/blob_scan_client.go

@@ -64,6 +64,12 @@ func (c *BlobScanClient) GetBlobByVersionedHashAndBlockTime(ctx context.Context,
 	if err != nil {
 		return nil, fmt.Errorf("failed to decode result into struct, err: %w", err)
 	}
+
+	// check that blob data is not empty
+	if len(result.Data) < 2 {
+		return nil, fmt.Errorf("blob data is too short to be valid, expected at least 2 characters, got: %s, versioned hash: %s", result.Data, versionedHash.String())
+	}
+
 	blobBytes, err := hex.DecodeString(result.Data[2:])
 	if err != nil {
 		return nil, fmt.Errorf("failed to decode data to bytes, err: %w", err)

rollup/da_syncer/blob_client/block_native_client.go

@@ -59,6 +59,12 @@ func (c *BlockNativeClient) GetBlobByVersionedHashAndBlockTime(ctx context.Conte
 	if err != nil {
 		return nil, fmt.Errorf("failed to decode result into struct, err: %w", err)
 	}
+
+	// check that blob data is not empty
+	if len(result.Blob.Data) < 2 {
+		return nil, fmt.Errorf("blob data is too short to be valid, expected at least 2 characters, got: %s, versioned hash: %s", result.Blob.Data, versionedHash.String())
+	}
+
 	blobBytes, err := hex.DecodeString(result.Blob.Data[2:])
 	if err != nil {
 		return nil, fmt.Errorf("failed to decode data to bytes, err: %w", err)