Add additional security measure to prevent disconnecting notarized blocks

src/main.cpp

@@ -2672,6 +2672,15 @@ bool static DisconnectTip(CValidationState &state) {
     CBlock block;
     if (!ReadBlockFromDisk(block, pindexDelete))
         return AbortNode(state, "Failed to read block");
+
+    int32_t prevMoMheight; uint256 notarizedhash,txid;
+    komodo_notarized_height(&prevMoMheight,&notarizedhash,&txid);
+    if ( block.GetHash() == notarizedhash )
+    {
+        fprintf(stderr,"DisconnectTip trying to disconnect notarized block at ht.%d\n",(int32_t)pindexDelete->nHeight);
+        return(false);
+    }
+
     // Apply the block atomically to the chain state.
     uint256 anchorBeforeDisconnect = pcoinsTip->GetBestAnchor();
     int64_t nStart = GetTimeMicros();