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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,162 @@ | ||
| use crate::logging::MutinyLogger; | ||
| use crate::node::NetworkGraph; | ||
| use crate::scorer::HubPreferentialScorer; | ||
| use crate::utils::Mutex; | ||
| use bitcoin::secp256k1::PublicKey; | ||
| use lightning::ln::channelmanager::ChannelDetails; | ||
| use lightning::ln::features::ChannelFeatures; | ||
| use lightning::ln::msgs::LightningError; | ||
| use lightning::routing::gossip::NodeId; | ||
| use lightning::routing::router::{ | ||
| BlindedTail, DefaultRouter, InFlightHtlcs, Path, Payee, Route, RouteHop, RouteParameters, | ||
| Router, | ||
| }; | ||
| use lightning::routing::scoring::ProbabilisticScoringFeeParameters; | ||
| use lightning::util::ser::Writeable; | ||
| use log::{info, warn}; | ||
| use std::sync::Arc; | ||
|
|
||
| type LdkRouter = DefaultRouter< | ||
| Arc<NetworkGraph>, | ||
| Arc<MutinyLogger>, | ||
| Arc<Mutex<HubPreferentialScorer>>, | ||
| ProbabilisticScoringFeeParameters, | ||
| HubPreferentialScorer, | ||
| >; | ||
|
|
||
| pub struct MutinyRouter { | ||
| network_graph: Arc<NetworkGraph>, | ||
| lsp_key: Option<PublicKey>, | ||
| router: LdkRouter, | ||
| } | ||
|
|
||
| impl MutinyRouter { | ||
| pub fn new( | ||
| network_graph: Arc<NetworkGraph>, | ||
| lsp_key: Option<PublicKey>, | ||
| logger: Arc<MutinyLogger>, | ||
| random_seed_bytes: [u8; 32], | ||
| scorer: Arc<Mutex<HubPreferentialScorer>>, | ||
| score_params: ProbabilisticScoringFeeParameters, | ||
| ) -> Self { | ||
| let router = DefaultRouter::new( | ||
| network_graph.clone(), | ||
| logger, | ||
| random_seed_bytes, | ||
| scorer, | ||
| score_params, | ||
| ); | ||
|
|
||
| Self { | ||
| network_graph, | ||
| lsp_key, | ||
| router, | ||
| } | ||
| } | ||
| } | ||
|
|
||
| impl Router for MutinyRouter { | ||
| fn find_route( | ||
| &self, | ||
| payer: &PublicKey, | ||
| route_params: &RouteParameters, | ||
| first_hops: Option<&[&ChannelDetails]>, | ||
| inflight_htlcs: InFlightHtlcs, | ||
| ) -> Result<Route, LightningError> { | ||
| match &route_params.payment_params.payee { | ||
| Payee::Clear { .. } => { | ||
| self.router | ||
| .find_route(payer, route_params, first_hops, inflight_htlcs) | ||
| } | ||
| Payee::Blinded { | ||
| route_hints, | ||
| features: _, | ||
| } => { | ||
| // if we have no LSP, then handle normally | ||
| if self.lsp_key.is_none() { | ||
| return self | ||
| .router | ||
| .find_route(payer, route_params, first_hops, inflight_htlcs); | ||
| } | ||
|
|
||
| let (blinded_info, blinded_path) = route_hints.first().unwrap(); | ||
| let graph_lock = self.network_graph.read_only(); | ||
| let lsp_node_id = NodeId::from_pubkey(&self.lsp_key.unwrap()); | ||
| let node_info = graph_lock.node(&lsp_node_id).unwrap(); | ||
|
|
||
| let amt = route_params.final_value_msat; | ||
|
|
||
| // first our channel with enough capacity | ||
| let first_hops = first_hops.unwrap_or(&[]); | ||
| let first = first_hops | ||
| .iter() | ||
| .find_map(|c| { | ||
| if c.outbound_capacity_msat >= amt { | ||
| Some(c) | ||
| } else { | ||
| None | ||
| } | ||
| }) | ||
| .unwrap(); | ||
|
|
||
| let channel_features = | ||
| ChannelFeatures::from_be_bytes(first.counterparty.features.encode()); | ||
|
|
||
| let scid = scid_from_parts(467591, 1, 0); | ||
| warn!("scid: {}", scid); | ||
|
|
||
| let cltv_expiry_delta = first.config.unwrap().cltv_expiry_delta; | ||
| let hops = vec![ | ||
| RouteHop { | ||
| pubkey: self.lsp_key.unwrap(), | ||
| node_features: node_info | ||
| .announcement_info | ||
| .as_ref() | ||
| .unwrap() | ||
| .features | ||
| .clone(), | ||
| short_channel_id: first.get_outbound_payment_scid().unwrap(), | ||
| channel_features: channel_features.clone(), | ||
| fee_msat: 0, // 0 for own channel | ||
| cltv_expiry_delta: 0, // 0 for own channel | ||
| maybe_announced_channel: false, | ||
| }, | ||
| RouteHop { | ||
| pubkey: blinded_path.introduction_node_id, | ||
| node_features: node_info | ||
| .announcement_info | ||
| .as_ref() | ||
| .unwrap() | ||
| .features | ||
| .clone(), | ||
| short_channel_id: 17112782831943311000, // fixme | ||
| channel_features, | ||
| fee_msat: 10_000, // put high value just to try | ||
| cltv_expiry_delta: cltv_expiry_delta as u32, | ||
| maybe_announced_channel: false, | ||
| }, | ||
| ]; | ||
|
|
||
| let blinded_tail = Some(BlindedTail { | ||
| hops: blinded_path.blinded_hops.clone(), | ||
| blinding_point: blinded_path.blinding_point, | ||
| excess_final_cltv_expiry_delta: blinded_info.cltv_expiry_delta as u32, | ||
| final_value_msat: amt, | ||
| }); | ||
|
|
||
| let path = Path { hops, blinded_tail }; | ||
|
|
||
| Ok(Route { | ||
| paths: vec![path], | ||
| route_params: Some(route_params.clone()), | ||
| }) | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| /// Constructs a `short_channel_id` using the components pieces. Results in an error | ||
| /// if the block height, tx index, or vout index overflow the maximum sizes. | ||
| pub fn scid_from_parts(block: u64, tx_index: u64, vout_index: u64) -> u64 { | ||
| (block << 40) | (tx_index << 16) | vout_index | ||
| } |
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