Electrum

exchange rate: remove CoinDesk provider

The API is non-functional and their new api requires an authorization
token, so we cannot keep using it.

hw_wallet/qt: reuse device message dialog across button requests

QtHandlerBase.message_dialog() used to tear down the current dialog
(clear_dialog -> QDialog.accept) and build a brand-new WindowModalDialog
on every device button request. A device emits one button request per
output, so signing a tx with many outputs rebuilt the dialog once per
output. On macOS a window-modal QDialog is shown as an animated "sheet",
so the popup visibly slid closed and reopened for each output, and the
GUI churn also competed with the single hardware-comms thread for the
GIL, adding latency between device prompts.

Reuse the open dialog and just update its label text when one is already
showing (title and on_cancel are stable within a signing flow). This
also smooths Ledger's repeated progress messages, which update the text
on each call.

payment_identifier: expand FIXME that openalias resolution DNS-leaks

and even for lightning-address, we also do the openalias resolution!

util: CallbackManager: add comment how unregister_callback could race

qml: disallow wallet names starting with '.'

Prevent users from creating or renaming wallet files starting with
a `.` as those files are not listed in the wallet list, making it
impossible to access the wallet.
Later we could allow this again and implement opening such a "hidden"
wallet file e.g. through the wizard.

Related https://github.com/spesmilo/electrum/issues/10688

fixup! trezor: support Safe 7

wallet: followup d2d4251c8 (paid invoice cache)

Followup to d2d4251c8 (paid invoice caching) in wallet.py.
* rename cache attribute to indicate it is a in-memory cache
* some minor reordering/simplifications
* also update on adb_removed_tx

lnurl: fail lnurl-pay on successAction field

Fail the lnurl flow if a `successAction` field is present in the
lnurl callback response.
This prevents users from losing their payment until we properly
implement showing LUD-09 responses in the GUI.
See https://github.com/lnurl/luds/blob/luds/09.md.

Related: https://github.com/spesmilo/electrum/issues/10269

qt: prevent setting locktime on channel funding tx

Prevents the user from manually modifying the locktime of a
lightning channel funding transaction.
This seems like a potential footgun without much practical use.

trezor: support Safe 7

Trezor Safe 7 is using Trezor-Host Protocol, for encrypted and authenticated communication:
https://docs.trezor.io/trezor-firmware/common/thp/specification.html

Since it requires a pairing process before device features are available,
an additional `WCTrezorPair` wizard step is introduced, allowing the user
to enter 6-digit pairing code (as shown on the device).

qml: QEInvoice: check if channels are still reestablishing

When opening an InvoiceDialog quickly after starting Electrum, e.g.
when it is being launched through an URI, the UI will say insufficient
balance if the lightning channels are still in the process of being
reestablished. While technically correct this is confusing to the user.
Instead if there is are channels that are funded and still disconnected
this will now change it to tell the user that the channels are still
in the connection phase.

qml: InvoiceDialog: fix onCompleted operator precendence bug

qml: InvoiceDialog: update fiat label onQuotesUpdated

When opening the InvoiceDialog quickly after starting the app
the fx quotes might not be available yet. Once they become available
the InvoiceDialog wouldn't update and keep showing quotes unavailable.
This e.g. always happens when launching Electrum through an URI on Android.

test_storage_upgrade: add test wallet with invoice and request

add_tx_fee_from_server: check fee_sat type

keystore: remove old python2 invocation and emacs python mode

swaps: cache SwapData in self._swaps instead of accessing storage

SwapsData contains several fields that are not stored on disk.
We should not expect these fields to be persisted across database access.
This commit caches swap data in self._swaps instead of accessing the storage, so that temporary fields are reusable.

lnworker: export_channel_backup: document design in more detail

follow-up 7a6a39d1aa9423b608b0bc3d505323464735fa34

follow-up prev: trivial clean-up

swaps: SWAP_TX_SIZE: add longer explanation (comment)

create_channel_storage: return dict instead of StoredDict

We should avoid dangling StoredDict; this does not make sense
if the DB is not in memory.

qml: QEWallet lifecycle fix, remove QEWallet from QEWallet.__instances on destruction.

This never surfaced, as the mobile GUI currently has no option to unload/close a wallet.

commands: add delete_channel(_backup) cli commands, analog to functionality already present in the GUIs

constants: add basic sanity check for servers.json

Some users will fiddle with this file and if we don't sanity check the
error will pop out elsewhere and end up as a not immediately obvious
crash report on github

lnwire: add bolt12 types to onion_wire