From f1ca469e9f15965ab3fc61027be6584b7a2476bf Mon Sep 17 00:00:00 2001 From: Yuntai Kyong Date: Wed, 26 Sep 2018 19:55:47 -0400 Subject: [PATCH] Expose updating fee on an individual channel --- src/ln/channelmanager.rs | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) diff --git a/src/ln/channelmanager.rs b/src/ln/channelmanager.rs index 6015c0ff8..d7c2e5110 100644 --- a/src/ln/channelmanager.rs +++ b/src/ln/channelmanager.rs @@ -1935,6 +1935,42 @@ impl ChannelManager { } res } + + /// Begin Update fee process. Allowed only on an outbound channel. + /// If successful, will generate a UpdateHTLCs event, so you should probably poll + /// PeerManager::process_events afterwards. + pub fn update_fee(&self, channel_id: [u8;32], feerate_per_kw: u64) -> Result<(), APIError> { + let mut channel_state = self.channel_state.lock().unwrap(); + match channel_state.by_id.get_mut(&channel_id) { + None => return Err(APIError::APIMisuseError{err: "Failed to find corresponding channel"}), + Some(chan) => { + if !chan.is_usable() { + return Err(APIError::APIMisuseError{err: "Channel is not in usuable state"}); + } + if !chan.is_outbound() { + return Err(APIError::APIMisuseError{err: "update_fee cannot be sent for an inbound channel"}); + } + if let Some((update_fee, commitment_signed, chan_monitor)) = chan.send_update_fee_and_commit(feerate_per_kw).map_err(|e| APIError::APIMisuseError{err: e.err})? { + if let Err(_e) = self.monitor.add_update_monitor(chan_monitor.get_funding_txo().unwrap(), chan_monitor) { + unimplemented!(); + } + let mut pending_events = self.pending_events.lock().unwrap(); + pending_events.push(events::Event::UpdateHTLCs { + node_id: chan.get_their_node_id(), + updates: msgs::CommitmentUpdate { + update_add_htlcs: Vec::new(), + update_fulfill_htlcs: Vec::new(), + update_fail_htlcs: Vec::new(), + update_fail_malformed_htlcs: Vec::new(), + update_fee: Some(update_fee), + commitment_signed, + }, + }); + } + }, + } + Ok(()) + } } impl events::EventsProvider for ChannelManager { -- 2.39.5