wallet: fix offline hw wallet signing when not specifying --offline

closes #5532

electrum/interface.py

@@ -157,7 +157,10 @@ class NotificationSession(RPCSession):
             self.interface.logger.debug(msg)
 
 
-class GracefulDisconnect(Exception):
+class NetworkException(Exception): pass
+
+
+class GracefulDisconnect(NetworkException):
     log_level = logging.INFO
 
     def __init__(self, *args, log_level=None, **kwargs):
@@ -173,7 +176,7 @@ class RequestTimedOut(GracefulDisconnect):
 
 class ErrorParsingSSLCert(Exception): pass
 class ErrorGettingSSLCertFromServer(Exception): pass
-class ConnectError(Exception): pass
+class ConnectError(NetworkException): pass
 
 
 class _RSClient(RSClient):

electrum/network.py

@@ -52,7 +52,8 @@ from . import blockchain
 from . import bitcoin
 from .blockchain import Blockchain, HEADER_SIZE
 from .interface import (Interface, serialize_server, deserialize_server,
-                        RequestTimedOut, NetworkTimeout, BUCKET_NAME_OF_ONION_SERVERS)
+                        RequestTimedOut, NetworkTimeout, BUCKET_NAME_OF_ONION_SERVERS,
+                        NetworkException)
 from .version import PROTOCOL_VERSION
 from .simple_config import SimpleConfig
 from .i18n import _
@@ -174,10 +175,10 @@ def deserialize_proxy(s: str) -> Optional[dict]:
     return proxy
 
 
-class BestEffortRequestFailed(Exception): pass
+class BestEffortRequestFailed(NetworkException): pass
 
 
-class TxBroadcastError(Exception):
+class TxBroadcastError(NetworkException):
     def get_message_for_gui(self):
         raise NotImplementedError()
 
@@ -205,7 +206,7 @@ class TxBroadcastUnknownError(TxBroadcastError):
                     _("Consider trying to connect to a different server, or updating Electrum."))
 
 
-class UntrustedServerReturnedError(Exception):
+class UntrustedServerReturnedError(NetworkException):
     def __init__(self, *, original_exception):
         self.original_exception = original_exception
 

electrum/wallet.py

@@ -61,7 +61,7 @@ from .address_synchronizer import (AddressSynchronizer, TX_HEIGHT_LOCAL,
 from .paymentrequest import (PR_PAID, PR_UNPAID, PR_UNKNOWN, PR_EXPIRED,
                              InvoiceStore)
 from .contacts import Contacts
-from .interface import RequestTimedOut
+from .interface import NetworkException
 from .ecc_fast import is_using_fast_ecc
 from .mnemonic import Mnemonic
 from .logging import get_logger
@@ -1060,7 +1060,7 @@ class Abstract_Wallet(AddressSynchronizer):
                 return True
         return False
 
-    def get_input_tx(self, tx_hash, ignore_timeout=False):
+    def get_input_tx(self, tx_hash, *, ignore_network_issues=False):
         # First look up an input transaction in the wallet where it
         # will likely be.  If co-signing a transaction it may not have
         # all the input txs, in which case we ask the network.
@@ -1069,9 +1069,10 @@ class Abstract_Wallet(AddressSynchronizer):
             try:
                 raw_tx = self.network.run_from_another_thread(
                     self.network.get_transaction(tx_hash, timeout=10))
-            except RequestTimedOut as e:
-                self.logger.info(f'getting input txn from network timed out for {tx_hash}')
-                if not ignore_timeout:
+            except NetworkException as e:
+                self.logger.info(f'got network error getting input txn. err: {repr(e)}. txid: {tx_hash}. '
+                                 f'if you are intentionally offline, consider using the --offline flag')
+                if not ignore_network_issues:
                     raise e
             else:
                 tx = Transaction(raw_tx)
@@ -1082,8 +1083,8 @@ class Abstract_Wallet(AddressSynchronizer):
         for txin in tx.inputs():
             tx_hash = txin['prevout_hash']
             # segwit inputs might not be needed for some hw wallets
-            ignore_timeout = Transaction.is_segwit_input(txin)
-            txin['prev_tx'] = self.get_input_tx(tx_hash, ignore_timeout)
+            ignore_network_issues = Transaction.is_segwit_input(txin)
+            txin['prev_tx'] = self.get_input_tx(tx_hash, ignore_network_issues=ignore_network_issues)
         # add output info for hw wallets
         info = {}
         xpubs = self.get_master_public_keys()