1 //! The top-level routing/network map tracking logic lives here.
3 //! You probably want to create a NetGraphMsgHandler and use that as your RoutingMessageHandler and then
4 //! interrogate it to get routes for your own payments.
7 use bitcoin::hashes::Hash;
11 use lightning::routing::router::RouteHop as nativeRouteHopImport;
12 type nativeRouteHop = nativeRouteHopImport;
18 /// Nearly everywhere, inner must be non-null, however in places where
19 /// the Rust equivalent takes an Option, it may be set to null to indicate None.
20 pub inner: *mut nativeRouteHop,
24 impl Drop for RouteHop {
26 if self.is_owned && !<*mut nativeRouteHop>::is_null(self.inner) {
27 let _ = unsafe { Box::from_raw(self.inner) };
32 pub extern "C" fn RouteHop_free(this_ptr: RouteHop) { }
34 /// Used only if an object of this type is returned as a trait impl by a method
35 extern "C" fn RouteHop_free_void(this_ptr: *mut c_void) {
36 unsafe { let _ = Box::from_raw(this_ptr as *mut nativeRouteHop); }
39 /// When moving out of the pointer, we have to ensure we aren't a reference, this makes that easy
41 pub(crate) fn take_inner(mut self) -> *mut nativeRouteHop {
42 assert!(self.is_owned);
44 self.inner = std::ptr::null_mut();
48 /// The node_id of the node at this hop.
50 pub extern "C" fn RouteHop_get_pubkey(this_ptr: &RouteHop) -> crate::c_types::PublicKey {
51 let mut inner_val = &mut unsafe { &mut *this_ptr.inner }.pubkey;
52 crate::c_types::PublicKey::from_rust(&(*inner_val))
54 /// The node_id of the node at this hop.
56 pub extern "C" fn RouteHop_set_pubkey(this_ptr: &mut RouteHop, mut val: crate::c_types::PublicKey) {
57 unsafe { &mut *this_ptr.inner }.pubkey = val.into_rust();
59 /// The node_announcement features of the node at this hop. For the last hop, these may be
60 /// amended to match the features present in the invoice this node generated.
62 pub extern "C" fn RouteHop_get_node_features(this_ptr: &RouteHop) -> crate::ln::features::NodeFeatures {
63 let mut inner_val = &mut unsafe { &mut *this_ptr.inner }.node_features;
64 crate::ln::features::NodeFeatures { inner: unsafe { ( (&((*inner_val)) as *const _) as *mut _) }, is_owned: false }
66 /// The node_announcement features of the node at this hop. For the last hop, these may be
67 /// amended to match the features present in the invoice this node generated.
69 pub extern "C" fn RouteHop_set_node_features(this_ptr: &mut RouteHop, mut val: crate::ln::features::NodeFeatures) {
70 unsafe { &mut *this_ptr.inner }.node_features = *unsafe { Box::from_raw(val.take_inner()) };
72 /// The channel that should be used from the previous hop to reach this node.
74 pub extern "C" fn RouteHop_get_short_channel_id(this_ptr: &RouteHop) -> u64 {
75 let mut inner_val = &mut unsafe { &mut *this_ptr.inner }.short_channel_id;
78 /// The channel that should be used from the previous hop to reach this node.
80 pub extern "C" fn RouteHop_set_short_channel_id(this_ptr: &mut RouteHop, mut val: u64) {
81 unsafe { &mut *this_ptr.inner }.short_channel_id = val;
83 /// The channel_announcement features of the channel that should be used from the previous hop
84 /// to reach this node.
86 pub extern "C" fn RouteHop_get_channel_features(this_ptr: &RouteHop) -> crate::ln::features::ChannelFeatures {
87 let mut inner_val = &mut unsafe { &mut *this_ptr.inner }.channel_features;
88 crate::ln::features::ChannelFeatures { inner: unsafe { ( (&((*inner_val)) as *const _) as *mut _) }, is_owned: false }
90 /// The channel_announcement features of the channel that should be used from the previous hop
91 /// to reach this node.
93 pub extern "C" fn RouteHop_set_channel_features(this_ptr: &mut RouteHop, mut val: crate::ln::features::ChannelFeatures) {
94 unsafe { &mut *this_ptr.inner }.channel_features = *unsafe { Box::from_raw(val.take_inner()) };
96 /// The fee taken on this hop (for paying for the use of the *next* channel in the path).
97 /// For the last hop, this should be the full value of the payment (might be more than
98 /// requested if we had to match htlc_minimum_msat).
100 pub extern "C" fn RouteHop_get_fee_msat(this_ptr: &RouteHop) -> u64 {
101 let mut inner_val = &mut unsafe { &mut *this_ptr.inner }.fee_msat;
104 /// The fee taken on this hop (for paying for the use of the *next* channel in the path).
105 /// For the last hop, this should be the full value of the payment (might be more than
106 /// requested if we had to match htlc_minimum_msat).
108 pub extern "C" fn RouteHop_set_fee_msat(this_ptr: &mut RouteHop, mut val: u64) {
109 unsafe { &mut *this_ptr.inner }.fee_msat = val;
111 /// The CLTV delta added for this hop. For the last hop, this should be the full CLTV value
112 /// expected at the destination, in excess of the current block height.
114 pub extern "C" fn RouteHop_get_cltv_expiry_delta(this_ptr: &RouteHop) -> u32 {
115 let mut inner_val = &mut unsafe { &mut *this_ptr.inner }.cltv_expiry_delta;
118 /// The CLTV delta added for this hop. For the last hop, this should be the full CLTV value
119 /// expected at the destination, in excess of the current block height.
121 pub extern "C" fn RouteHop_set_cltv_expiry_delta(this_ptr: &mut RouteHop, mut val: u32) {
122 unsafe { &mut *this_ptr.inner }.cltv_expiry_delta = val;
126 pub extern "C" fn RouteHop_new(mut pubkey_arg: crate::c_types::PublicKey, mut node_features_arg: crate::ln::features::NodeFeatures, mut short_channel_id_arg: u64, mut channel_features_arg: crate::ln::features::ChannelFeatures, mut fee_msat_arg: u64, mut cltv_expiry_delta_arg: u32) -> RouteHop {
127 RouteHop { inner: Box::into_raw(Box::new(nativeRouteHop {
128 pubkey: pubkey_arg.into_rust(),
129 node_features: *unsafe { Box::from_raw(node_features_arg.take_inner()) },
130 short_channel_id: short_channel_id_arg,
131 channel_features: *unsafe { Box::from_raw(channel_features_arg.take_inner()) },
132 fee_msat: fee_msat_arg,
133 cltv_expiry_delta: cltv_expiry_delta_arg,
134 })), is_owned: true }
136 impl Clone for RouteHop {
137 fn clone(&self) -> Self {
139 inner: if <*mut nativeRouteHop>::is_null(self.inner) { std::ptr::null_mut() } else {
140 Box::into_raw(Box::new(unsafe { &*self.inner }.clone())) },
146 /// Used only if an object of this type is returned as a trait impl by a method
147 pub(crate) extern "C" fn RouteHop_clone_void(this_ptr: *const c_void) -> *mut c_void {
148 Box::into_raw(Box::new(unsafe { (*(this_ptr as *mut nativeRouteHop)).clone() })) as *mut c_void
151 pub extern "C" fn RouteHop_clone(orig: &RouteHop) -> RouteHop {
155 use lightning::routing::router::Route as nativeRouteImport;
156 type nativeRoute = nativeRouteImport;
158 /// A route directs a payment from the sender (us) to the recipient. If the recipient supports MPP,
159 /// it can take multiple paths. Each path is composed of one or more hops through the network.
163 /// Nearly everywhere, inner must be non-null, however in places where
164 /// the Rust equivalent takes an Option, it may be set to null to indicate None.
165 pub inner: *mut nativeRoute,
169 impl Drop for Route {
171 if self.is_owned && !<*mut nativeRoute>::is_null(self.inner) {
172 let _ = unsafe { Box::from_raw(self.inner) };
177 pub extern "C" fn Route_free(this_ptr: Route) { }
179 /// Used only if an object of this type is returned as a trait impl by a method
180 extern "C" fn Route_free_void(this_ptr: *mut c_void) {
181 unsafe { let _ = Box::from_raw(this_ptr as *mut nativeRoute); }
184 /// When moving out of the pointer, we have to ensure we aren't a reference, this makes that easy
186 pub(crate) fn take_inner(mut self) -> *mut nativeRoute {
187 assert!(self.is_owned);
188 let ret = self.inner;
189 self.inner = std::ptr::null_mut();
193 /// The list of routes taken for a single (potentially-)multi-part payment. The pubkey of the
194 /// last RouteHop in each path must be the same.
195 /// Each entry represents a list of hops, NOT INCLUDING our own, where the last hop is the
196 /// destination. Thus, this must always be at least length one. While the maximum length of any
197 /// given path is variable, keeping the length of any path to less than 20 should currently
198 /// ensure it is viable.
200 pub extern "C" fn Route_set_paths(this_ptr: &mut Route, mut val: crate::c_types::derived::CVec_CVec_RouteHopZZ) {
201 let mut local_val = Vec::new(); for mut item in val.into_rust().drain(..) { local_val.push( { let mut local_val_0 = Vec::new(); for mut item in item.into_rust().drain(..) { local_val_0.push( { *unsafe { Box::from_raw(item.take_inner()) } }); }; local_val_0 }); };
202 unsafe { &mut *this_ptr.inner }.paths = local_val;
206 pub extern "C" fn Route_new(mut paths_arg: crate::c_types::derived::CVec_CVec_RouteHopZZ) -> Route {
207 let mut local_paths_arg = Vec::new(); for mut item in paths_arg.into_rust().drain(..) { local_paths_arg.push( { let mut local_paths_arg_0 = Vec::new(); for mut item in item.into_rust().drain(..) { local_paths_arg_0.push( { *unsafe { Box::from_raw(item.take_inner()) } }); }; local_paths_arg_0 }); };
208 Route { inner: Box::into_raw(Box::new(nativeRoute {
209 paths: local_paths_arg,
210 })), is_owned: true }
212 impl Clone for Route {
213 fn clone(&self) -> Self {
215 inner: if <*mut nativeRoute>::is_null(self.inner) { std::ptr::null_mut() } else {
216 Box::into_raw(Box::new(unsafe { &*self.inner }.clone())) },
222 /// Used only if an object of this type is returned as a trait impl by a method
223 pub(crate) extern "C" fn Route_clone_void(this_ptr: *const c_void) -> *mut c_void {
224 Box::into_raw(Box::new(unsafe { (*(this_ptr as *mut nativeRoute)).clone() })) as *mut c_void
227 pub extern "C" fn Route_clone(orig: &Route) -> Route {
231 pub extern "C" fn Route_write(obj: &Route) -> crate::c_types::derived::CVec_u8Z {
232 crate::c_types::serialize_obj(unsafe { &*unsafe { &*obj }.inner })
235 pub(crate) extern "C" fn Route_write_void(obj: *const c_void) -> crate::c_types::derived::CVec_u8Z {
236 crate::c_types::serialize_obj(unsafe { &*(obj as *const nativeRoute) })
239 pub extern "C" fn Route_read(ser: crate::c_types::u8slice) -> crate::c_types::derived::CResult_RouteDecodeErrorZ {
240 let res = crate::c_types::deserialize_obj(ser);
241 let mut local_res = match res { Ok(mut o) => crate::c_types::CResultTempl::ok( { crate::routing::router::Route { inner: Box::into_raw(Box::new(o)), is_owned: true } }).into(), Err(mut e) => crate::c_types::CResultTempl::err( { crate::ln::msgs::DecodeError { inner: Box::into_raw(Box::new(e)), is_owned: true } }).into() };
245 use lightning::routing::router::RouteHint as nativeRouteHintImport;
246 type nativeRouteHint = nativeRouteHintImport;
248 /// A channel descriptor which provides a last-hop route to get_route
251 pub struct RouteHint {
252 /// Nearly everywhere, inner must be non-null, however in places where
253 /// the Rust equivalent takes an Option, it may be set to null to indicate None.
254 pub inner: *mut nativeRouteHint,
258 impl Drop for RouteHint {
260 if self.is_owned && !<*mut nativeRouteHint>::is_null(self.inner) {
261 let _ = unsafe { Box::from_raw(self.inner) };
266 pub extern "C" fn RouteHint_free(this_ptr: RouteHint) { }
268 /// Used only if an object of this type is returned as a trait impl by a method
269 extern "C" fn RouteHint_free_void(this_ptr: *mut c_void) {
270 unsafe { let _ = Box::from_raw(this_ptr as *mut nativeRouteHint); }
273 /// When moving out of the pointer, we have to ensure we aren't a reference, this makes that easy
275 pub(crate) fn take_inner(mut self) -> *mut nativeRouteHint {
276 assert!(self.is_owned);
277 let ret = self.inner;
278 self.inner = std::ptr::null_mut();
282 /// The node_id of the non-target end of the route
284 pub extern "C" fn RouteHint_get_src_node_id(this_ptr: &RouteHint) -> crate::c_types::PublicKey {
285 let mut inner_val = &mut unsafe { &mut *this_ptr.inner }.src_node_id;
286 crate::c_types::PublicKey::from_rust(&(*inner_val))
288 /// The node_id of the non-target end of the route
290 pub extern "C" fn RouteHint_set_src_node_id(this_ptr: &mut RouteHint, mut val: crate::c_types::PublicKey) {
291 unsafe { &mut *this_ptr.inner }.src_node_id = val.into_rust();
293 /// The short_channel_id of this channel
295 pub extern "C" fn RouteHint_get_short_channel_id(this_ptr: &RouteHint) -> u64 {
296 let mut inner_val = &mut unsafe { &mut *this_ptr.inner }.short_channel_id;
299 /// The short_channel_id of this channel
301 pub extern "C" fn RouteHint_set_short_channel_id(this_ptr: &mut RouteHint, mut val: u64) {
302 unsafe { &mut *this_ptr.inner }.short_channel_id = val;
304 /// The fees which must be paid to use this channel
306 pub extern "C" fn RouteHint_get_fees(this_ptr: &RouteHint) -> crate::routing::network_graph::RoutingFees {
307 let mut inner_val = &mut unsafe { &mut *this_ptr.inner }.fees;
308 crate::routing::network_graph::RoutingFees { inner: unsafe { ( (&((*inner_val)) as *const _) as *mut _) }, is_owned: false }
310 /// The fees which must be paid to use this channel
312 pub extern "C" fn RouteHint_set_fees(this_ptr: &mut RouteHint, mut val: crate::routing::network_graph::RoutingFees) {
313 unsafe { &mut *this_ptr.inner }.fees = *unsafe { Box::from_raw(val.take_inner()) };
315 /// The difference in CLTV values between this node and the next node.
317 pub extern "C" fn RouteHint_get_cltv_expiry_delta(this_ptr: &RouteHint) -> u16 {
318 let mut inner_val = &mut unsafe { &mut *this_ptr.inner }.cltv_expiry_delta;
321 /// The difference in CLTV values between this node and the next node.
323 pub extern "C" fn RouteHint_set_cltv_expiry_delta(this_ptr: &mut RouteHint, mut val: u16) {
324 unsafe { &mut *this_ptr.inner }.cltv_expiry_delta = val;
326 impl Clone for RouteHint {
327 fn clone(&self) -> Self {
329 inner: if <*mut nativeRouteHint>::is_null(self.inner) { std::ptr::null_mut() } else {
330 Box::into_raw(Box::new(unsafe { &*self.inner }.clone())) },
336 /// Used only if an object of this type is returned as a trait impl by a method
337 pub(crate) extern "C" fn RouteHint_clone_void(this_ptr: *const c_void) -> *mut c_void {
338 Box::into_raw(Box::new(unsafe { (*(this_ptr as *mut nativeRouteHint)).clone() })) as *mut c_void
341 pub extern "C" fn RouteHint_clone(orig: &RouteHint) -> RouteHint {
344 /// Gets a route from us (payer) to the given target node (payee).
346 /// Extra routing hops between known nodes and the target will be used if they are included in
349 /// If some channels aren't announced, it may be useful to fill in a first_hops with the
350 /// results from a local ChannelManager::list_usable_channels() call. If it is filled in, our
351 /// view of our local channels (from net_graph_msg_handler) will be ignored, and only those
352 /// in first_hops will be used.
354 /// Panics if first_hops contains channels without short_channel_ids
355 /// (ChannelManager::list_usable_channels will never include such channels).
357 /// The fees on channels from us to next-hops are ignored (as they are assumed to all be
358 /// equal), however the enabled/disabled bit on such channels as well as the
359 /// htlc_minimum_msat/htlc_maximum_msat *are* checked as they may change based on the receiving node.
361 pub extern "C" fn get_route(mut our_node_id: crate::c_types::PublicKey, network: &crate::routing::network_graph::NetworkGraph, mut payee: crate::c_types::PublicKey, first_hops: *mut crate::c_types::derived::CVec_ChannelDetailsZ, mut last_hops: crate::c_types::derived::CVec_RouteHintZ, mut final_value_msat: u64, mut final_cltv: u32, mut logger: crate::util::logger::Logger) -> crate::c_types::derived::CResult_RouteLightningErrorZ {
362 let mut local_first_hops_base = if first_hops == std::ptr::null_mut() { None } else { Some( { let mut local_first_hops_0 = Vec::new(); for mut item in unsafe { &mut *first_hops }.as_slice().iter() { local_first_hops_0.push( { unsafe { &*item.inner } }); }; local_first_hops_0 }) }; let mut local_first_hops = local_first_hops_base.as_ref().map(|a| &a[..]);
363 let mut local_last_hops = Vec::new(); for mut item in last_hops.as_slice().iter() { local_last_hops.push( { unsafe { &*item.inner } }); };
364 let mut ret = lightning::routing::router::get_route(&our_node_id.into_rust(), unsafe { &*network.inner }, &payee.into_rust(), local_first_hops, &local_last_hops[..], final_value_msat, final_cltv, logger);
365 let mut local_ret = match ret { Ok(mut o) => crate::c_types::CResultTempl::ok( { crate::routing::router::Route { inner: Box::into_raw(Box::new(o)), is_owned: true } }).into(), Err(mut e) => crate::c_types::CResultTempl::err( { crate::ln::msgs::LightningError { inner: Box::into_raw(Box::new(e)), is_owned: true } }).into() };