electrum

Electrum Bitcoin wallet
git clone https://git.parazyd.org/electrum
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commit 530a446172ac244a7a96b277edfeae9fffa65c1d
parent 6040e953a32803a65a10f62d4f7ac815d1a9e590
Author: SomberNight <somber.night@protonmail.com>
Date:   Fri, 22 May 2020 17:11:53 +0200

follow-up prev: don't reuse funding tx change address for static_remotekey

see comment in code

Diffstat:
Melectrum/lnpeer.py | 29+++++++++++++++++++++++++++--
Melectrum/lnworker.py | 2+-
2 files changed, 28 insertions(+), 3 deletions(-)

diff --git a/electrum/lnpeer.py b/electrum/lnpeer.py @@ -517,9 +517,34 @@ class Peer(Logger): ) return local_config + def temporarily_reserve_funding_tx_change_address(func): + # During the channel open flow, if we initiated, we might have used a change address + # of ours in the funding tx. The funding tx is not part of the wallet history + # at that point yet, but we should already consider this change address as 'used'. + async def wrapper(self: 'Peer', *args, **kwargs): + funding_tx = kwargs['funding_tx'] # type: PartialTransaction + wallet = self.lnworker.wallet + change_addresses = [txout.address for txout in funding_tx.outputs() + if wallet.is_change(txout.address)] + for addr in change_addresses: + wallet.set_reserved_state_of_address(addr, reserved=True) + try: + return await func(self, *args, **kwargs) + finally: + for addr in change_addresses: + self.lnworker.wallet.set_reserved_state_of_address(addr, reserved=False) + return wrapper + @log_exceptions - async def channel_establishment_flow(self, password: Optional[str], funding_tx: 'PartialTransaction', funding_sat: int, - push_msat: int, temp_channel_id: bytes) -> Tuple[Channel, 'PartialTransaction']: + @temporarily_reserve_funding_tx_change_address + async def channel_establishment_flow( + self, *, + password: Optional[str], + funding_tx: 'PartialTransaction', + funding_sat: int, + push_msat: int, + temp_channel_id: bytes + ) -> Tuple[Channel, 'PartialTransaction']: await asyncio.wait_for(self.initialized, LN_P2P_NETWORK_TIMEOUT) feerate = self.lnworker.current_feerate_per_kw() local_config = self.make_local_config(funding_sat, push_msat, LOCAL) diff --git a/electrum/lnworker.py b/electrum/lnworker.py @@ -749,7 +749,7 @@ class LNWallet(LNWorker): # will raise if init fails await asyncio.wait_for(peer.initialized, LN_P2P_NETWORK_TIMEOUT) chan, funding_tx = await peer.channel_establishment_flow( - password, + password=password, funding_tx=funding_tx, funding_sat=funding_sat, push_msat=push_sat * 1000,