/// The fee taken on this hop. For the last hop, this should be the full value of the payment.
pub fee_msat: u64,
/// The CLTV delta added for this hop. For the last hop, this should be the full CLTV value
- /// expected at the destination, NOT a delta.
+ /// expected at the destination, in excess of the current block height.
pub cltv_expiry_delta: u32,
}
let mut first_hop_targets = HashMap::with_capacity(if first_hops.is_some() { first_hops.as_ref().unwrap().len() } else { 0 });
if let Some(hops) = first_hops {
for chan in hops {
- first_hop_targets.insert(chan.remote_network_id, chan.short_channel_id.expect("first_hops should be filled in with usable channels, not pending ones"));
+ let short_channel_id = chan.short_channel_id.expect("first_hops should be filled in with usable channels, not pending ones");
+ if chan.remote_network_id == *target {
+ return Ok(Route {
+ hops: vec![RouteHop {
+ pubkey: chan.remote_network_id,
+ short_channel_id,
+ fee_msat: final_value_msat,
+ cltv_expiry_delta: final_cltv,
+ }],
+ });
+ }
+ first_hop_targets.insert(chan.remote_network_id, short_channel_id);
}
if first_hop_targets.is_empty() {
return Err(HandleError{err: "Cannot route when there are no outbound routes away from us", action: None});
( $chan_id: expr, $dest_node_id: expr, $directional_info: expr, $starting_fee_msat: expr ) => {
//TODO: Explore simply adding fee to hit htlc_minimum_msat
if $starting_fee_msat as u64 + final_value_msat > $directional_info.htlc_minimum_msat {
- let new_fee = $directional_info.fee_base_msat as u64 + ($starting_fee_msat + final_value_msat) * ($directional_info.fee_proportional_millionths as u64) / 1000000;
- let mut total_fee = $starting_fee_msat as u64;
- let mut hm_entry = dist.entry(&$directional_info.src_node_id);
- let old_entry = hm_entry.or_insert_with(|| {
- let node = network.nodes.get(&$directional_info.src_node_id).unwrap();
- (u64::max_value(),
- node.lowest_inbound_channel_fee_base_msat as u64,
- node.lowest_inbound_channel_fee_proportional_millionths as u64,
- RouteHop {
- pubkey: PublicKey::new(),
- short_channel_id: 0,
- fee_msat: 0,
- cltv_expiry_delta: 0,
- })
- });
- if $directional_info.src_node_id != network.our_node_id {
- // Ignore new_fee for channel-from-us as we assume all channels-from-us
- // will have the same effective-fee
- total_fee += new_fee;
- total_fee += old_entry.2 * (final_value_msat + total_fee) / 1000000 + old_entry.1;
- }
- let new_graph_node = RouteGraphNode {
- pubkey: $directional_info.src_node_id,
- lowest_fee_to_peer_through_node: total_fee,
- };
- if old_entry.0 > total_fee {
- targets.push(new_graph_node);
- old_entry.0 = total_fee;
- old_entry.3 = RouteHop {
- pubkey: $dest_node_id.clone(),
- short_channel_id: $chan_id.clone(),
- fee_msat: new_fee, // This field is ignored on the last-hop anyway
- cltv_expiry_delta: $directional_info.cltv_expiry_delta as u32,
+ let proportional_fee_millions = ($starting_fee_msat + final_value_msat).checked_mul($directional_info.fee_proportional_millionths as u64);
+ if let Some(new_fee) = proportional_fee_millions.and_then(|part| {
+ ($directional_info.fee_base_msat as u64).checked_add(part / 1000000) })
+ {
+ let mut total_fee = $starting_fee_msat as u64;
+ let hm_entry = dist.entry(&$directional_info.src_node_id);
+ let old_entry = hm_entry.or_insert_with(|| {
+ let node = network.nodes.get(&$directional_info.src_node_id).unwrap();
+ (u64::max_value(),
+ node.lowest_inbound_channel_fee_base_msat as u64,
+ node.lowest_inbound_channel_fee_proportional_millionths as u64,
+ RouteHop {
+ pubkey: PublicKey::new(),
+ short_channel_id: 0,
+ fee_msat: 0,
+ cltv_expiry_delta: 0,
+ })
+ });
+ if $directional_info.src_node_id != network.our_node_id {
+ // Ignore new_fee for channel-from-us as we assume all channels-from-us
+ // will have the same effective-fee
+ total_fee += new_fee;
+ total_fee += old_entry.2 * (final_value_msat + total_fee) / 1000000 + old_entry.1;
+ }
+ let new_graph_node = RouteGraphNode {
+ pubkey: $directional_info.src_node_id,
+ lowest_fee_to_peer_through_node: total_fee,
+ };
+ if old_entry.0 > total_fee {
+ targets.push(new_graph_node);
+ old_entry.0 = total_fee;
+ old_entry.3 = RouteHop {
+ pubkey: $dest_node_id.clone(),
+ short_channel_id: $chan_id.clone(),
+ fee_msat: new_fee, // This field is ignored on the last-hop anyway
+ cltv_expiry_delta: $directional_info.cltv_expiry_delta as u32,
+ }
}
}
}
projects / rust-lightning / blobdiff