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Channel manager refactor all #160

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Merged
merged 3 commits into from
Sep 7, 2018
Merged

Channel manager refactor all #160

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cdbd7ce
Refactor handle_funding_signed to wrapper error handling function
Sep 7, 2018
8dfc3c3
Refactor handle_funding_locked to wrapper error handling function
Sep 7, 2018
4b5b48c
Refactor handle_shutdown to wrapper error handling function
Sep 7, 2018
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147 changes: 81 additions & 66 deletions src/ln/channelmanager.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1511,6 +1511,84 @@ impl ChannelManager {
Ok(funding_msg)
}

fn internal_funding_signed(&self, their_node_id: &PublicKey, msg: &msgs::FundingSigned) -> Result<(), MsgHandleErrInternal> {
let (funding_txo, user_id, monitor) = {
let mut channel_state = self.channel_state.lock().unwrap();
match channel_state.by_id.get_mut(&msg.channel_id) {
Some(chan) => {
if chan.get_their_node_id() != *their_node_id {
//TODO: here and below MsgHandleErrInternal, #153 case
return Err(MsgHandleErrInternal::send_err_msg_no_close("Got a message for a channel from the wrong node!", msg.channel_id));
}
let chan_monitor = chan.funding_signed(&msg).map_err(|e| MsgHandleErrInternal::from_maybe_close(e))?;
(chan.get_funding_txo().unwrap(), chan.get_user_id(), chan_monitor)
},
None => return Err(MsgHandleErrInternal::send_err_msg_no_close("Failed to find corresponding channel", msg.channel_id))
}
};
if let Err(_e) = self.monitor.add_update_monitor(monitor.get_funding_txo().unwrap(), monitor) {
unimplemented!();
}
let mut pending_events = self.pending_events.lock().unwrap();
pending_events.push(events::Event::FundingBroadcastSafe {
funding_txo: funding_txo,
user_channel_id: user_id,
});
Ok(())
}

fn internal_funding_locked(&self, their_node_id: &PublicKey, msg: &msgs::FundingLocked) -> Result<Option<msgs::AnnouncementSignatures>, MsgHandleErrInternal> {
let mut channel_state = self.channel_state.lock().unwrap();
match channel_state.by_id.get_mut(&msg.channel_id) {
Some(chan) => {
if chan.get_their_node_id() != *their_node_id {
//TODO: here and below MsgHandleErrInternal, #153 case
return Err(MsgHandleErrInternal::send_err_msg_no_close("Got a message for a channel from the wrong node!", msg.channel_id));
}
chan.funding_locked(&msg).map_err(|e| MsgHandleErrInternal::from_maybe_close(e))?;
return Ok(self.get_announcement_sigs(chan));
},
None => return Err(MsgHandleErrInternal::send_err_msg_no_close("Failed to find corresponding channel", msg.channel_id))
};
}

fn internal_shutdown(&self, their_node_id: &PublicKey, msg: &msgs::Shutdown) -> Result<(Option<msgs::Shutdown>, Option<msgs::ClosingSigned>), MsgHandleErrInternal> {
let (res, chan_option) = {
let mut channel_state_lock = self.channel_state.lock().unwrap();
let channel_state = channel_state_lock.borrow_parts();

match channel_state.by_id.entry(msg.channel_id.clone()) {
hash_map::Entry::Occupied(mut chan_entry) => {
if chan_entry.get().get_their_node_id() != *their_node_id {
//TODO: here and below MsgHandleErrInternal, #153 case
return Err(MsgHandleErrInternal::send_err_msg_no_close("Got a message for a channel from the wrong node!", msg.channel_id));
}
let res = chan_entry.get_mut().shutdown(&*self.fee_estimator, &msg).map_err(|e| MsgHandleErrInternal::from_maybe_close(e))?;
if chan_entry.get().is_shutdown() {
if let Some(short_id) = chan_entry.get().get_short_channel_id() {
channel_state.short_to_id.remove(&short_id);
}
(res, Some(chan_entry.remove_entry().1))
} else { (res, None) }
},
hash_map::Entry::Vacant(_) => return Err(MsgHandleErrInternal::send_err_msg_no_close("Failed to find corresponding channel", msg.channel_id))
}
};
for payment_hash in res.2 {
// unknown_next_peer...I dunno who that is anymore....
self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), &payment_hash, HTLCFailReason::Reason { failure_code: 0x4000 | 10, data: Vec::new() });
}
if let Some(chan) = chan_option {
if let Ok(update) = self.get_channel_update(&chan) {
let mut events = self.pending_events.lock().unwrap();
events.push(events::Event::BroadcastChannelUpdate {
msg: update
});
}
}
Ok((res.0, res.1))
}

fn internal_announcement_signatures(&self, their_node_id: &PublicKey, msg: &msgs::AnnouncementSignatures) -> Result<(), MsgHandleErrInternal> {
let (chan_announcement, chan_update) = {
let mut channel_state = self.channel_state.lock().unwrap();
Expand Down Expand Up @@ -1725,78 +1803,15 @@ impl ChannelMessageHandler for ChannelManager {
}

fn handle_funding_signed(&self, their_node_id: &PublicKey, msg: &msgs::FundingSigned) -> Result<(), HandleError> {
let (funding_txo, user_id, monitor) = {
let mut channel_state = self.channel_state.lock().unwrap();
match channel_state.by_id.get_mut(&msg.channel_id) {
Some(chan) => {
if chan.get_their_node_id() != *their_node_id {
return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
}
let chan_monitor = chan.funding_signed(&msg)?;
(chan.get_funding_txo().unwrap(), chan.get_user_id(), chan_monitor)
},
None => return Err(HandleError{err: "Failed to find corresponding channel", action: None})
}
};
if let Err(_e) = self.monitor.add_update_monitor(monitor.get_funding_txo().unwrap(), monitor) {
unimplemented!();
}
let mut pending_events = self.pending_events.lock().unwrap();
pending_events.push(events::Event::FundingBroadcastSafe {
funding_txo: funding_txo,
user_channel_id: user_id,
});
Ok(())
handle_error!(self, self.internal_funding_signed(their_node_id, msg), their_node_id)
}

fn handle_funding_locked(&self, their_node_id: &PublicKey, msg: &msgs::FundingLocked) -> Result<Option<msgs::AnnouncementSignatures>, HandleError> {
let mut channel_state = self.channel_state.lock().unwrap();
match channel_state.by_id.get_mut(&msg.channel_id) {
Some(chan) => {
if chan.get_their_node_id() != *their_node_id {
return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
}
chan.funding_locked(&msg)?;
return Ok(self.get_announcement_sigs(chan));
},
None => return Err(HandleError{err: "Failed to find corresponding channel", action: None})
};
handle_error!(self, self.internal_funding_locked(their_node_id, msg), their_node_id)
}

fn handle_shutdown(&self, their_node_id: &PublicKey, msg: &msgs::Shutdown) -> Result<(Option<msgs::Shutdown>, Option<msgs::ClosingSigned>), HandleError> {
let (res, chan_option) = {
let mut channel_state_lock = self.channel_state.lock().unwrap();
let channel_state = channel_state_lock.borrow_parts();

match channel_state.by_id.entry(msg.channel_id.clone()) {
hash_map::Entry::Occupied(mut chan_entry) => {
if chan_entry.get().get_their_node_id() != *their_node_id {
return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
}
let res = chan_entry.get_mut().shutdown(&*self.fee_estimator, &msg)?;
if chan_entry.get().is_shutdown() {
if let Some(short_id) = chan_entry.get().get_short_channel_id() {
channel_state.short_to_id.remove(&short_id);
}
(res, Some(chan_entry.remove_entry().1))
} else { (res, None) }
},
hash_map::Entry::Vacant(_) => return Err(HandleError{err: "Failed to find corresponding channel", action: None})
}
};
for payment_hash in res.2 {
// unknown_next_peer...I dunno who that is anymore....
self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), &payment_hash, HTLCFailReason::Reason { failure_code: 0x4000 | 10, data: Vec::new() });
}
if let Some(chan) = chan_option {
if let Ok(update) = self.get_channel_update(&chan) {
let mut events = self.pending_events.lock().unwrap();
events.push(events::Event::BroadcastChannelUpdate {
msg: update
});
}
}
Ok((res.0, res.1))
handle_error!(self, self.internal_shutdown(their_node_id, msg), their_node_id)
}

fn handle_closing_signed(&self, their_node_id: &PublicKey, msg: &msgs::ClosingSigned) -> Result<Option<msgs::ClosingSigned>, HandleError> {
Expand Down