wallet: more powerful add_input_info

tangentially related: #4814

also recognise that input is_mine if tx was not fully parsed
but we have the prevout UTXO

electrum/gui/qt/transaction_dialog.py

@@ -39,7 +39,7 @@ from electrum.i18n import _
 from electrum.plugin import run_hook
 from electrum import simple_config
 from electrum.util import bfh
-from electrum.transaction import SerializationError
+from electrum.transaction import SerializationError, Transaction
 
 from .util import *
 
@@ -73,7 +73,7 @@ class TxDialog(QDialog, MessageBoxMixin):
         # Take a copy; it might get updated in the main window by
         # e.g. the FX plugin.  If this happens during or after a long
         # sign operation the signatures are lost.
-        self.tx = tx = copy.deepcopy(tx)
+        self.tx = tx = copy.deepcopy(tx)  # type: Transaction
         try:
             self.tx.deserialize()
         except BaseException as e:

electrum/wallet.py

@@ -734,7 +734,7 @@ class Abstract_Wallet(AddressSynchronizer):
         raise NotImplementedError()  # implemented by subclasses
 
     def add_input_info(self, txin):
-        address = txin['address']
+        address = self.get_txin_address(txin)
         if self.is_mine(address):
             txin['type'] = self.get_txin_type(address)
             # segwit needs value to sign