From 9d6cabd18ab032b34fcb2863b578015f2e2a4415 Mon Sep 17 00:00:00 2001
From: vyzo <vyzo@hackzen.org>
Date: Sat, 3 Jul 2021 12:08:40 +0300
Subject: [PATCH] if it's not a dag, it's not a block

---
 blockstore/splitstore/splitstore.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/blockstore/splitstore/splitstore.go b/blockstore/splitstore/splitstore.go
index cb4aae621..f04d18ec0 100644
--- a/blockstore/splitstore/splitstore.go
+++ b/blockstore/splitstore/splitstore.go
@@ -674,6 +674,10 @@ func (s *SplitStore) isVMCopyContext() bool {
 }
 
 func (s *SplitStore) isBlockHeader(c cid.Cid) (isBlock bool, err error) {
+	if c.Prefix().Codec != cid.DagCBOR {
+		return false, nil
+	}
+
 	err = s.view(c, func(data []byte) error {
 		var hdr types.BlockHeader
 		isBlock = hdr.UnmarshalCBOR(bytes.NewBuffer(data)) == nil