diff --git a/blockchain_parser/script.py b/blockchain_parser/script.py
index ac0a6b1..f7fc2c4 100644
--- a/blockchain_parser/script.py
+++ b/blockchain_parser/script.py
@@ -70,8 +70,12 @@ def operations(self):
         """
         if self._operations is None:
             # Some coinbase scripts are garbage, they could not be valid
-            self._operations = list(self.script)
-
+            try:
+                self._operations = list(self.script)
+            except CScriptTruncatedPushDataError:
+                self._operations = "[INVALID]"
+            except CScriptInvalidError:
+                self._operations = "[INVALID]"
         return self._operations
 
     @property
@@ -132,4 +136,24 @@ def is_multisig(self):
     def is_unknown(self):
         return not self.is_pubkeyhash() and not self.is_pubkey() \
             and not self.is_p2sh() and not self.is_multisig() \
-            and not self.is_return()
+            and not self.is_return() and not self.is_p2wpkh()\
+            and not self.is_p2wsh()
+
+    # add by hzx
+    def is_p2wpkh(self):
+        if len(self.operations) == 2:
+            a = bytes(self.operations[0])
+            b = bytes(self.operations[1])
+            return len(a)==0 and len(b) == 20
+        
+        return False
+
+    # add by hzx
+    def is_p2wsh(self):
+        if len(self.operations) == 2:
+            a = bytes(self.operations[0])
+            b = bytes(self.operations[1])
+            return len(a)==0 and len(b) == 32
+        
+        return False
+