It is ugly that the 'channel' callback takes a wallet I guess,
but with channel backups in one wallet, and active channels in another,
it was causing problems... (when open simultaneously)
This is too complicated and ugly because it relies on side
effects. What we should do instead is collapse transactions
in children nodes of QTreeView (see #6237)
Before this, we were subscribing to our addresses in their bip32 order,
leaking this information to servers. While this leak seems mostly harmless,
it is trivial to fix.
- Use change addresses (instead of receive) for the static_remotekey to_remote outputs,
and reserve these to greatly reduce the chance of address-reuse
- Use change addresses (instead of receive) for LN channel sweep addresses.
Note that these atm are not getting reserved.
- also, disallow deleting last address from an imported wallet (fixes#3254, fixes#4833)
- also, set LNBackups.sweep_address lazily, as during fresh wallet creation
there are no addresses in the wallet at that point yet! see trace below.
Traceback (most recent call last):
[...]
File "...\electrum\electrum\tests\test_commands.py", line 112, in test_export_private_key_deterministic
wallet = restore_wallet_from_text('bitter grass shiver impose acquire brush forget axis eager alone wine silver',
File "...\electrum\electrum\wallet.py", line 2575, in restore_wallet_from_text
wallet = Wallet(db, storage, config=config)
File "...\electrum\electrum\wallet.py", line 2502, in __new__
wallet = WalletClass(db, storage, config=config)
File "...\electrum\electrum\wallet.py", line 2346, in __init__
Deterministic_Wallet.__init__(self, db, storage, config=config)
File "...\electrum\electrum\wallet.py", line 2147, in __init__
Abstract_Wallet.__init__(self, db, storage, config=config)
File "...\electrum\electrum\wallet.py", line 261, in __init__
self.lnbackups = LNBackups(self)
File "...\electrum\electrum\lnworker.py", line 1401, in __init__
self.sweep_address = wallet.get_receiving_address()
File "...\electrum\electrum\wallet.py", line 1498, in wrapper
addr = func(self, *args, **kwargs)
File "...\electrum\electrum\wallet.py", line 1520, in get_receiving_address
raise Exception("no receiving addresses in wallet?!")
Exception: no receiving addresses in wallet?!
external code (commands/gui) did not always take lock when iterating lnworker.channels.
instead of exposing lock, let's take a copy internally (as with .peers)
