some basic sanity checks
Previously if the server sent back a malformed response, it could partially corrupt a wallet file.
(as sometimes the response would get persisted, and issues would only arise later when the values were used)
fixes#6306
scenario: confirm tx dialog open, not enough funds (but only due to fees),
user clicks advanced, dialog half-empty.
note: the preview dialog is only half-empty if it never managed to create a tx.
if it did but it cannot now due to the current fee settings, then it will just
show that fee is too high (red text, buttons disabled) and show the last tx with the prev fee
ServerProxy does not seem to be thread-safe.
For e.g. a 2of3 multisig wallet, which would send two messages,
one msg would get sent but the other might error out. See trace:
E | plugins.cosigner_pool.qt.Plugin | on_failure
Traceback (most recent call last):
File "...\electrum\electrum\gui\qt\util.py", line 832, in run
result = task.task()
File "...\electrum\electrum\plugins\cosigner_pool\qt.py", line 199, in <lambda>
task = lambda: server.put(_hash, message)
File "...\Python38\lib\xmlrpc\client.py", line 1109, in __call__
return self.__send(self.__name, args)
File "...\Python38\lib\xmlrpc\client.py", line 1450, in __request
response = self.__transport.request(
File "...\Python38\lib\xmlrpc\client.py", line 1153, in request
return self.single_request(host, handler, request_body, verbose)
File "...\Python38\lib\xmlrpc\client.py", line 1165, in single_request
http_conn = self.send_request(host, handler, request_body, verbose)
File "...\Python38\lib\xmlrpc\client.py", line 1271, in send_request
connection.putrequest("POST", handler, skip_accept_encoding=True)
File "...\Python38\lib\http\client.py", line 1088, in putrequest
raise CannotSendRequest(self.__state)
http.client.CannotSendRequest: Request-sent
When raising generic Exception, window.on_error can't tell whether
there was a programming error or we just want to communicate with the user.
E | gui.qt.main_window.[default_wallet] | on_error
Traceback (most recent call last):
File "/home/user/wspace/electrum/electrum/gui/qt/util.py", line 832, in run
result = task.task()
File "/home/user/wspace/electrum/electrum/gui/qt/main_window.py", line 2900, in <lambda>
task = lambda: self.network.run_from_another_thread(
File "/home/user/wspace/electrum/electrum/network.py", line 358, in run_from_another_thread
return fut.result(timeout)
File "/usr/lib/python3.8/concurrent/futures/_base.py", line 439, in result
return self.__get_result()
File "/usr/lib/python3.8/concurrent/futures/_base.py", line 388, in __get_result
raise self._exception
File "/home/user/wspace/electrum/electrum/wallet.py", line 162, in sweep_preparations
raise Exception(_('No inputs found.'))
Exception: No inputs found.
I think on_release has better UX.
More importantly, on desktop linux with kivy 2.0.0rc2, on_press does not work for me.
(but on Android, with kivy 1.11.1, it does)
