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Add outbound flag to DirectedChannelInfo

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If `outband` flag is set to true then `ChannelInfo::node_one`
  is forwarding a payment to target `ChannelInfo::node_two`.
  If `outband` flag is set to false then `ChannelInfo::node_two`
  is forwarding a payment to target `ChannelInfo::node_one`.
This commit is contained in:
jbesraa 2023-12-05 20:56:51 +02:00
parent 37150b4d69
commit ec95e589ba
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GPG key ID: 3297752B76B93547
1 changed files with 19 additions and 11 deletions
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30
lightning/src/routing/gossip.rs
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@ -870,31 +870,31 @@ impl ChannelInfo {
/// Returns a [`DirectedChannelInfo`] for the channel directed to the given `target` from a
/// returned `source`, or `None` if `target` is not one of the channel's counterparties.
pub fn as_directed_to(&self, target: &NodeId) -> Option<(DirectedChannelInfo, &NodeId)> {
let (direction, source) = {
let (direction, source, outbound) = {
if target == &self.node_one {
(self.two_to_one.as_ref(), &self.node_two)
(self.two_to_one.as_ref(), &self.node_two, false)
} else if target == &self.node_two {
(self.one_to_two.as_ref(), &self.node_one)
(self.one_to_two.as_ref(), &self.node_one, true)
} else {
return None;
}
};
direction.map(|dir| (DirectedChannelInfo::new(self, dir), source))
direction.map(|dir| (DirectedChannelInfo::new(self, dir, outbound), source))
}
/// Returns a [`DirectedChannelInfo`] for the channel directed from the given `source` to a
/// returned `target`, or `None` if `source` is not one of the channel's counterparties.
pub fn as_directed_from(&self, source: &NodeId) -> Option<(DirectedChannelInfo, &NodeId)> {
let (direction, target) = {
let (direction, target, outbound) = {
if source == &self.node_one {
(self.one_to_two.as_ref(), &self.node_two)
(self.one_to_two.as_ref(), &self.node_two, true)
} else if source == &self.node_two {
(self.two_to_one.as_ref(), &self.node_one)
(self.two_to_one.as_ref(), &self.node_one, false)
} else {
return None;
}
};
direction.map(|dir| (DirectedChannelInfo::new(self, dir), target))
direction.map(|dir| (DirectedChannelInfo::new(self, dir, outbound), target))
}
/// Returns a [`ChannelUpdateInfo`] based on the direction implied by the channel_flag.
@ -992,24 +992,32 @@ pub struct DirectedChannelInfo<'a> {
direction: &'a ChannelUpdateInfo,
htlc_maximum_msat: u64,
effective_capacity: EffectiveCapacity,
/// Outbound from the perspective of `node_one`.
///
/// If true, the channel is considered to be outbound from `node_one` perspective.
/// If false, the channel is considered to be outbound from `node_two` perspective.
///
/// [`ChannelInfo::node_one`]
/// [`ChannelInfo::node_two`]
outbound: bool,
}
impl<'a> DirectedChannelInfo<'a> {
#[inline]
fn new(channel: &'a ChannelInfo, direction: &'a ChannelUpdateInfo) -> Self {
fn new(channel: &'a ChannelInfo, direction: &'a ChannelUpdateInfo, outbound: bool) -> Self {
let mut htlc_maximum_msat = direction.htlc_maximum_msat;
let capacity_msat = channel.capacity_sats.map(|capacity_sats| capacity_sats * 1000);
let effective_capacity = match capacity_msat {
Some(capacity_msat) => {
htlc_maximum_msat = cmp::min(htlc_maximum_msat, capacity_msat);
EffectiveCapacity::Total { capacity_msat, htlc_maximum_msat: htlc_maximum_msat }
EffectiveCapacity::Total { capacity_msat, htlc_maximum_msat }
},
None => EffectiveCapacity::AdvertisedMaxHTLC { amount_msat: htlc_maximum_msat },
};
Self {
channel, direction, htlc_maximum_msat, effective_capacity
channel, direction, htlc_maximum_msat, effective_capacity, outbound
}
}