Previously, during early-startup (until configure_logging(config) is
called in run_electrum),
- the stderr log handler lost all log messages below warning level, and
- the file log handler lost all log messages regardless of log level
We now instead start buffering log messages in memory as soon as
electrum.logging is imported. The buffer is dumped into the
stderr and file log handlers when they are fully set up, and then
the buffer is discarded (and the temporary log handler is removed).
Note that messages are not logged until configure_logging() is called.
Previously WARNING/ERROR messages would get logged immediately to stderr,
but not anymore. This was changed so that the order of the log messages
can be kept intact. (if we log WARNINGs immediately, but need to delay
INFOs until the config is available, messages would either be out of order
or alternatively there would be duplicates)
Relatedly, we now follow the recommendation of the python docs re
logging for libraries [0]: we try to only configure logging if running via
run_electrum (the main script) and not when e.g. a 3rd party script
imports electrum.
[0]: https://docs.python.org/3/howto/logging.html#configuring-logging-for-a-library
If you force-show a widget (e.g. `w.setVisible(True)`) before parenting it,
a small window will flash (appear and disappear) for a fraction of second,
which is a bit irritating.
There is gui.stop() already, which does the same thing (which is shared API with kivy).
Also, the _cleanup_before_exit() call was redundant in close(),
aboutToQuit handles that.
related: https://github.com/spesmilo/electrum/issues/6889
This fixes the case where the user quits by pressing Ctrl+C,
and some other minor things.
There is still another issue that sometimes causes a segfault during shutdown...
see #7158
```
$ ./contrib/pull_locale
Found 260 files to translate
Generate template
electrum/gui/qt/installwizard.py:265: warning: Empty msgid. It is reserved by GNU gettext:
gettext("") returns the header entry with
meta information, not the empty string.
electrum/gui/qt/channels_list.py:49: warning: Empty msgid. It is reserved by GNU gettext:
gettext("") returns the header entry with
meta information, not the empty string.
```
Previously the min() was passed lightning amounts and on-chain amounts mixed;
which is conceptually a type error. It is now only passed on-chain amounts.
Due to the bug, we did not allow a swap to fully exhaust out "LN receive" capacity.
Now the max amt can be slighly larger.
- document SwapManager._get_recv_amount and SwapManager._get_send_amount
- change calculations so that they match the boltz-backend
- note that in the reverse swap case, the server does not care about the on-chain claim tx the client
needs to pay for. This introduced some implicit hacks and inconsistencies in the code in the past,
it is still a bit ugly but at least this is now explicit.
- SwapManager._get_recv_amount and SwapManager._get_send_amount are now proper inverses of each other
-----
Here are some code snippets to play around with in Qt console.
For the forward swap case:
```
from electrum import ecc; lnworker = wallet.lnworker; sm = lnworker.swap_manager
invoice = network.run_from_another_thread(lnworker.create_invoice(amount_msat=3000000*1000, message="swap", expiry=86400))[1]; request_data = {"type": "submarine", "pairId": "BTC/BTC", "orderSide": "sell", "invoice": invoice, "refundPublicKey": ecc.GENERATOR.get_public_key_bytes().hex()}
network.send_http_on_proxy('post', sm.api_url + '/createswap', json=request_data, timeout=30)
sm.get_send_amount(3000000, is_reverse=False)
sm.get_recv_amount(3026730, is_reverse=False)
```
For the reverse swap case:
```
from electrum import ecc; import os; lnworker = wallet.lnworker; sm = lnworker.swap_manager
request_data = {"type": "reversesubmarine", "pairId": "BTC/BTC", "orderSide": "buy", "invoiceAmount": 3000000, "preimageHash": os.urandom(32).hex(), "claimPublicKey": ecc.GENERATOR.get_public_key_bytes().hex()}
network.send_http_on_proxy('post', sm.api_url + '/createswap', json=request_data, timeout=30)
sm.get_recv_amount(3000000, is_reverse=True)
sm.get_send_amount(2974443, is_reverse=True)
```
