lightning: implement channel types #7636
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* channel_type is put into storage, serialized as int and deserialized as ChannelType * check for static_remotekey is done via channel type
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SomberNight
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I still have a mainnet wallet with some pre-static-remotekey channels (though those channels are closed) that I do not want to delete yet. follow-up #7636 ``` E | gui.qt.exception_window.Exception_Hook | exception caught by crash reporter Traceback (most recent call last): File "...\electrum\electrum\gui\qt\__init__.py", line 307, in wrapper return func(self, *args, **kwargs) File "...\electrum\electrum\gui\qt\__init__.py", line 332, in start_new_window wallet = self._start_wizard_to_select_or_create_wallet(path) File "...\electrum\electrum\gui\qt\__init__.py", line 377, in _start_wizard_to_select_or_create_wallet db = WalletDB(storage.read(), manual_upgrades=False) File "...\electrum\electrum\wallet_db.py", line 73, in __init__ self.load_data(raw) File "...\electrum\electrum\wallet_db.py", line 106, in load_data self.upgrade() File "...\electrum\electrum\util.py", line 439, in <lambda> return lambda *args, **kw_args: do_profile(args, kw_args) File "...\electrum\electrum\util.py", line 435, in do_profile o = func(*args, **kw_args) File "...\electrum\electrum\wallet_db.py", line 195, in upgrade self._convert_version_44() File "...\electrum\electrum\wallet_db.py", line 859, in _convert_version_44 if item['static_remotekey_enabled']: KeyError: 'static_remotekey_enabled' ```
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Spec: lightning/bolts#880
This PR adds a TLV to
open_channelandaccept_channelmessages. The initiator checks the peer's node features and selects a channel type that is supported by both peers, which signals the type of the channel to be opened explicitly. This lets us remove thestatic_remotekey_enabledfield in the storage, which is now a IntFlag (ChannelType).This should also be applied to #7509.
Tests:
option_channel_type(testnet)