do not duplicate blacklist entries

onionr/communicator2.py

@@ -214,6 +214,9 @@ class OnionrCommunicatorDaemon:
                             self._core._utils.processBlockMetadata(blockHash) # caches block metadata values to block database
                         else:
                             logger.warn('POW failed for block ' + blockHash)
+                    else:
+                        if self._core._blacklist.inBlacklist(realHash):
+                            logger.warn('%s is blacklisted' % (realHash,))
                         else:
                             logger.warn('Metadata for ' + blockHash + ' is invalid.')
                             self._core._blacklist.addToDB(blockHash)

onionr/onionrblacklist.py

@@ -95,6 +95,10 @@ class OnionrBlackList:
         '''
         # we hash the data so we can remove data entirely from our node's disk
         hashed = self._core._utils.bytesToStr(self._core._crypto.sha3Hash(data))
+
+        if self.inBlacklist(hashed):
+            return
+
         if not hashed.isalnum():
             raise Exception("Hashed data is not alpha numeric")
         try: