Set protection against zero block offset

Author: valdok

explorer/adapter.cpp

@@ -249,7 +249,7 @@ class Adapter : public Node::IObserver, public IAdapter {
         _quote.data += 3;
     }
 
-    static const uint64_t s_TotalsVer = 1;
+    static const uint64_t s_TotalsVer = 2;
 
     void Initialize() override
     {
@@ -471,6 +471,12 @@ class Adapter : public Node::IObserver, public IAdapter {
 
             if (bForceReset)
             {
+                if (!lst.empty() && (lst.back().second.m_TotalOffset == sd.m_Extra0.m_TotalOffset))
+                {
+                    CorruptionException exc;
+                    exc.m_sErr = "zero offset detected. Full Reset is required to recover";
+                    throw exc;
+                }
             }
             else
             {

node/processor.cpp

@@ -3147,6 +3147,13 @@ bool NodeProcessor::HandleBlockInternal(const HeightHash& id, const Block::Syste
 
 	if (bFirstTime)
 	{
+		if (block.m_Offset.m_Value == Zero)
+		{
+			BEAM_LOG_WARNING() << id << " has zero offset";
+			return false;
+		}
+
+
 		pShared->m_Size = bufs.m_Perishable.size() + bufs.m_Eternal.size();
 		pShared->m_Ctx.m_Height = id.m_Height;