store exception in variable instead of using a bool flag
add default str to routing exceptions
Add separate exception class to handle fee related payment errors
note: I find "chains" less ambiguous than "networks" or "net".
Though the codebase already uses "net"/"network" for the same meaning,
e.g. see `electrum.constants.net` or the `getinfo` cmd dict containing a "network" key.. :/
force-closed. Assert final balance in lnworker.get_history().
If we offered some HTLCs, we do not know yet whether they will be
redeemed by us or by the remote.
ref https://github.com/spesmilo/electrum/pull/9189
```
Traceback (most recent call last):
File "/home/user/wspace/electrum/electrum/gui/qt/my_treeview.py", line 166, in on_commitData
self.tv.on_edited(idx, edit_key=edit_key, text=new_text)
File "/home/user/wspace/electrum/electrum/gui/qt/history_list.py", line 699, in on_edited
self.hm.update_fiat(index)
File "/home/user/wspace/electrum/electrum/gui/qt/history_list.py", line 371, in update_fiat
self.dataChanged.emit(idx, idx, [Qt.ItemDataRole.DisplayRole, Qt.ForegroundRole])
AttributeError: type object 'Qt' has no attribute 'ForegroundRole'
```
add space
add gossip address field serialization, parsing and tests
fix linter
consolidate tests, fix intendation
refactor test in loops
add gossip address field serialization, parsing and tests
Ideally, given an on-chain backup, after the remote force-closes, we should be able to spend our anchor output,
to CPFP the remote commitment tx (assuming the channel used OPTION_ANCHORS).
To spend the anchor output, we need to be able to sign with the local funding_privkey.
Previously we derived the funding_key from the channel_seed (which comes from os.urandom).
Prior to anchors, there was no use case for signing with the funding_key given a channel backup.
Now with anchors, we should make its derivation deterministic somehow, in a way so that it can
be derived given just an on-chain backup.
- one way would be to put some more data into the existing OP_RETURN
- uses block space
- the OP_RETURNs can be disabled via "use_recoverable_channels"
- only the initiator can use OP_RETURNs (so what if channel is in incoming dir?)
- instead, new scheme for our funding_key:
- we derive the funding_privkey from the lnworker root secret (derived from our bip32 seed)
- for outgoing channels:
- lnworker_root_secret + remote_node_id + funding_tx_nlocktime
- for incoming channels:
- lnworker_root_secret + remote_node_id + remote_funding_pubkey
- a check is added to avoid reusing the same key between channels:
not letting to user open more than one channel with the same peer in a single block
- only the first 16 bytes of the remote_node_id are used, as the onchain backup OP_RETURNs only contain that
- as the funding_privkey cannot be derived from the channel_seed anymore, it is included in the
imported channel backups, which in turn need a new version defined
- a wallet db upgrade is used to update already stored imported cbs
- alternatively we could keep the imported cbs as-is, so no new version, no new funding_privkey field, as it is clearly somewhat redundant given on-chain backups can reconstruct it
- however adding the field seems easier
- otherwise the existing code would try to derive the funding_privkey from the channel_seed
- also note: atm there is no field in the imported backups to distinguish anchor channels vs static-remotekey channels
