fix input_script and remove unused method inputs_without_script

lib/tests/test_transaction.py

@@ -86,9 +86,6 @@ class TestTransaction(unittest.TestCase):
         self.assertTrue(tx.has_address('1446oU3z268EeFgfcwJv6X2VBXHfoYxfuD'))
         self.assertFalse(tx.has_address('1CQj15y1N7LDHp7wTt28eoD1QhHgFgxECH'))
 
-        # Commenting out broken test until we know why inputs_without_script() is not returnng anything.
-        #self.assertEquals(tx.inputs_without_script(), set(x_pubkey for i in expected['inputs'] for x_pubkey in i['x_pubkeys']))
-
         self.assertEquals(tx.serialize(), unsigned_blob)
 
         tx.update_signatures(signed_blob)
@@ -126,7 +123,6 @@ class TestTransaction(unittest.TestCase):
         self.assertEquals(tx.deserialize(), None)
         self.assertEquals(tx.as_dict(), {'hex': signed_blob, 'complete': True, 'final': True})
 
-        self.assertEquals(tx.inputs_without_script(), set())
         self.assertEquals(tx.serialize(), signed_blob)
 
         tx.update_signatures(signed_blob)

lib/transaction.py

@@ -636,9 +636,9 @@ class Transaction:
 
     @classmethod
     def input_script(self, txin, estimate_size=False):
-        if txin.get('scriptSig'):
-            return txin['scriptSig']
         _type = txin['type']
+        if _type == 'coinbase':
+            return txin['scriptSig']
         pubkeys, sig_list = self.get_siglist(txin, estimate_size)
         script = ''.join(push_script(x) for x in sig_list)
         if _type == 'p2pk':
@@ -651,7 +651,7 @@ class Transaction:
         elif _type == 'p2pkh':
             script += push_script(pubkeys[0])
         elif _type == 'p2wpkh-p2sh':
-            redeem_script = segwit_script(pubkeys[0])
+            redeem_script = txin.get('redeemScript') or segwit_script(pubkeys[0])
             return push_script(redeem_script)
         elif _type == 'address':
             script += push_script(pubkeys[0])
@@ -808,14 +808,6 @@ class Transaction:
         s, r = self.signature_count()
         return r == s
 
-    def inputs_without_script(self):
-        out = set()
-        for i, txin in enumerate(self.inputs()):
-            if txin.get('scriptSig') == '':
-                out.add(i)
-        return out
-
-
     def sign(self, keypairs):
         for i, txin in enumerate(self.inputs()):
             num = txin['num_sig']