bugfix: If parentofParent is nil, return the parent.Difficulty

This was observed during the hardfork recovery process, this ideally should never happen but we cannot crash the node if it did
Scliin1 · Oct 25, 2023 · d6304db · d6304db
1 parent d8c64cf
commit d6304db
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Showing 2 changed files with 2 additions and 2 deletions.
diff --git a/consensus/blake3pow/consensus.go b/consensus/blake3pow/consensus.go
@@ -350,7 +350,7 @@ func (blake3pow *Blake3pow) CalcDifficulty(chain consensus.ChainHeaderReader, pa
 	}
 
 	parentOfParent := chain.GetHeaderByHash(parent.ParentHash())
-	if parentOfParent.Hash() == chain.Config().GenesisHash {
+	if parentOfParent == nil || parentOfParent.Hash() == chain.Config().GenesisHash {
 		return parent.Difficulty()
 	}
 

diff --git a/consensus/progpow/consensus.go b/consensus/progpow/consensus.go
@@ -348,7 +348,7 @@ func (progpow *Progpow) CalcDifficulty(chain consensus.ChainHeaderReader, parent
 		return parent.Difficulty()
 	}
 	parentOfParent := chain.GetHeaderByHash(parent.ParentHash())
-	if parentOfParent.Hash() == chain.Config().GenesisHash {
+	if parentOfParent == nil || parentOfParent.Hash() == chain.Config().GenesisHash {
 		return parent.Difficulty()
 	}