payment_hash: Option<PaymentHash>,
timer_ticks_without_htlcs: u8,
},
- /// When a payer gives up trying to retry a payment, they inform us, letting us generate a
- /// `PaymentFailed` event when all HTLCs have irrevocably failed. This avoids a number of race
- /// conditions in MPP-aware payment retriers (1), where the possibility of multiple
- /// `PaymentPathFailed` events with `all_paths_failed` can be pending at once, confusing a
- /// downstream event handler as to when a payment has actually failed.
- ///
- /// (1) <https://github.com/lightningdevkit/rust-lightning/issues/1164>
+ /// When we've decided to give up retrying a payment, we mark it as abandoned so we can eventually
+ /// generate a `PaymentFailed` event when all HTLCs have irrevocably failed.
Abandoned {
session_privs: HashSet<[u8; 32]>,
payment_hash: PaymentHash,
let mut retry_id_route_params = None;
for (pmt_id, pmt) in outbounds.iter_mut() {
if pmt.is_auto_retryable_now() {
- if let PendingOutboundPayment::Retryable { payment_hash, pending_amt_msat, total_msat, payment_params: Some(params), .. } = pmt {
+ if let PendingOutboundPayment::Retryable { pending_amt_msat, total_msat, payment_params: Some(params), .. } = pmt {
if pending_amt_msat < total_msat {
- retry_id_route_params = Some((*pmt_id, *payment_hash, RouteParameters {
+ retry_id_route_params = Some((*pmt_id, RouteParameters {
final_value_msat: *total_msat - *pending_amt_msat,
final_cltv_expiry_delta:
if let Some(delta) = params.final_cltv_expiry_delta { delta }
}
}
core::mem::drop(outbounds);
- if let Some((payment_id, payment_hash, route_params)) = retry_id_route_params {
- self.retry_payment_internal(payment_id, payment_hash, route_params, router, first_hops(), &inflight_htlcs, entropy_source, node_signer, best_block_height, logger, pending_events, &send_payment_along_path)
+ if let Some((payment_id, route_params)) = retry_id_route_params {
+ self.retry_payment_internal(payment_id, route_params, router, first_hops(), &inflight_htlcs, entropy_source, node_signer, best_block_height, logger, pending_events, &send_payment_along_path)
} else { break }
}
}
fn retry_payment_internal<R: Deref, NS: Deref, ES: Deref, IH, SP, L: Deref>(
- &self, payment_id: PaymentId, payment_hash: PaymentHash, route_params: RouteParameters,
- router: &R, first_hops: Vec<ChannelDetails>, inflight_htlcs: &IH, entropy_source: &ES,
- node_signer: &NS, best_block_height: u32, logger: &L,
- pending_events: &Mutex<Vec<events::Event>>, send_payment_along_path: &SP,
+ &self, payment_id: PaymentId, route_params: RouteParameters, router: &R,
+ first_hops: Vec<ChannelDetails>, inflight_htlcs: &IH, entropy_source: &ES, node_signer: &NS,
+ best_block_height: u32, logger: &L, pending_events: &Mutex<Vec<events::Event>>,
+ send_payment_along_path: &SP,
)
where
R::Target: Router,
return
}
};
+ for path in route.paths.iter() {
+ if path.len() == 0 {
+ log_error!(logger, "length-0 path in route");
+ self.abandon_payment(payment_id, pending_events);
+ return
+ }
+ }
- let res = self.retry_payment_with_route(&route, payment_id, entropy_source, node_signer,
- best_block_height, send_payment_along_path);
+ const RETRY_OVERFLOW_PERCENTAGE: u64 = 10;
+ let mut onion_session_privs = Vec::with_capacity(route.paths.len());
+ for _ in 0..route.paths.len() {
+ onion_session_privs.push(entropy_source.get_secure_random_bytes());
+ }
+
+ macro_rules! abandon_with_entry {
+ ($payment_id: expr, $payment_hash: expr, $payment: expr, $pending_events: expr) => {
+ if $payment.get_mut().mark_abandoned().is_ok() && $payment.get().remaining_parts() == 0 {
+ $pending_events.lock().unwrap().push(events::Event::PaymentFailed {
+ payment_id: $payment_id,
+ payment_hash: $payment_hash,
+ });
+ $payment.remove();
+ }
+ }
+ }
+ let (total_msat, payment_hash, payment_secret, keysend_preimage) = {
+ let mut outbounds = self.pending_outbound_payments.lock().unwrap();
+ match outbounds.entry(payment_id) {
+ hash_map::Entry::Occupied(mut payment) => {
+ let res = match payment.get() {
+ PendingOutboundPayment::Retryable {
+ total_msat, payment_hash, keysend_preimage, payment_secret, pending_amt_msat, ..
+ } => {
+ let retry_amt_msat: u64 = route.paths.iter().map(|path| path.last().unwrap().fee_msat).sum();
+ if retry_amt_msat + *pending_amt_msat > *total_msat * (100 + RETRY_OVERFLOW_PERCENTAGE) / 100 {
+ log_error!(logger, "retry_amt_msat of {} will put pending_amt_msat (currently: {}) more than 10% over total_payment_amt_msat of {}", retry_amt_msat, pending_amt_msat, total_msat);
+ let payment_hash = *payment_hash;
+ abandon_with_entry!(payment_id, payment_hash, payment, pending_events);
+ return
+ }
+ (*total_msat, *payment_hash, *payment_secret, *keysend_preimage)
+ },
+ PendingOutboundPayment::Legacy { .. } => {
+ log_error!(logger, "Unable to retry payments that were initially sent on LDK versions prior to 0.0.102");
+ return
+ },
+ PendingOutboundPayment::Fulfilled { .. } => {
+ log_error!(logger, "Payment already completed");
+ return
+ },
+ PendingOutboundPayment::Abandoned { .. } => {
+ log_error!(logger, "Payment already abandoned (with some HTLCs still pending)");
+ return
+ },
+ };
+ if !payment.get().is_retryable_now() {
+ log_error!(logger, "Retries exhausted for payment id {}", log_bytes!(payment_id.0));
+ abandon_with_entry!(payment_id, res.1, payment, pending_events);
+ return
+ }
+ payment.get_mut().increment_attempts();
+ for (path, session_priv_bytes) in route.paths.iter().zip(onion_session_privs.iter()) {
+ assert!(payment.get_mut().insert(*session_priv_bytes, path));
+ }
+ res
+ },
+ hash_map::Entry::Vacant(_) => {
+ log_error!(logger, "Payment with ID {} not found", log_bytes!(payment_id.0));
+ return
+ }
+ }
+ };
+ let res = self.pay_route_internal(&route, payment_hash, &payment_secret, keysend_preimage,
+ payment_id, Some(total_msat), onion_session_privs, node_signer, best_block_height,
+ &send_payment_along_path);
log_info!(logger, "Result retrying payment id {}: {:?}", log_bytes!(payment_id.0), res);
if let Err(e) = res {
self.handle_pay_route_err(e, payment_id, payment_hash, route, route_params, router, first_hops, inflight_htlcs, entropy_source, node_signer, best_block_height, logger, pending_events, send_payment_along_path);
fn handle_pay_route_err<R: Deref, NS: Deref, ES: Deref, IH, SP, L: Deref>(
&self, err: PaymentSendFailure, payment_id: PaymentId, payment_hash: PaymentHash, route: Route,
- route_params: RouteParameters, router: &R, first_hops: Vec<ChannelDetails>, inflight_htlcs: &IH,
- entropy_source: &ES, node_signer: &NS, best_block_height: u32, logger: &L,
+ mut route_params: RouteParameters, router: &R, first_hops: Vec<ChannelDetails>,
+ inflight_htlcs: &IH, entropy_source: &ES, node_signer: &NS, best_block_height: u32, logger: &L,
pending_events: &Mutex<Vec<events::Event>>, send_payment_along_path: &SP,
)
where
{
match err {
PaymentSendFailure::AllFailedResendSafe(errs) => {
- Self::push_payment_path_failed_evs(payment_id, payment_hash, route.paths, errs.into_iter().map(|e| Err(e)), pending_events);
- self.retry_payment_internal(payment_id, payment_hash, route_params, router, first_hops, inflight_htlcs, entropy_source, node_signer, best_block_height, logger, pending_events, send_payment_along_path);
+ Self::push_path_failed_evs_and_scids(payment_id, payment_hash, &mut route_params, route.paths, errs.into_iter().map(|e| Err(e)), pending_events);
+ self.retry_payment_internal(payment_id, route_params, router, first_hops, inflight_htlcs, entropy_source, node_signer, best_block_height, logger, pending_events, send_payment_along_path);
},
- PaymentSendFailure::PartialFailure { failed_paths_retry: Some(retry), results, .. } => {
- Self::push_payment_path_failed_evs(payment_id, payment_hash, route.paths, results.into_iter(), pending_events);
+ PaymentSendFailure::PartialFailure { failed_paths_retry: Some(mut retry), results, .. } => {
+ Self::push_path_failed_evs_and_scids(payment_id, payment_hash, &mut retry, route.paths, results.into_iter(), pending_events);
// Some paths were sent, even if we failed to send the full MPP value our recipient may
// misbehave and claim the funds, at which point we have to consider the payment sent, so
// return `Ok()` here, ignoring any retry errors.
- self.retry_payment_internal(payment_id, payment_hash, retry, router, first_hops, inflight_htlcs, entropy_source, node_signer, best_block_height, logger, pending_events, send_payment_along_path);
+ self.retry_payment_internal(payment_id, retry, router, first_hops, inflight_htlcs, entropy_source, node_signer, best_block_height, logger, pending_events, send_payment_along_path);
},
PaymentSendFailure::PartialFailure { failed_paths_retry: None, .. } => {
// This may happen if we send a payment and some paths fail, but only due to a temporary
// initial HTLC-Add messages yet.
},
PaymentSendFailure::PathParameterError(results) => {
- Self::push_payment_path_failed_evs(payment_id, payment_hash, route.paths, results.into_iter(), pending_events);
+ Self::push_path_failed_evs_and_scids(payment_id, payment_hash, &mut route_params, route.paths, results.into_iter(), pending_events);
self.abandon_payment(payment_id, pending_events);
},
PaymentSendFailure::ParameterError(e) => {
}
}
- fn push_payment_path_failed_evs<I: ExactSizeIterator + Iterator<Item = Result<(), APIError>>>(
- payment_id: PaymentId, payment_hash: PaymentHash, paths: Vec<Vec<RouteHop>>, path_results: I,
- pending_events: &Mutex<Vec<events::Event>>
+ fn push_path_failed_evs_and_scids<I: ExactSizeIterator + Iterator<Item = Result<(), APIError>>>(
+ payment_id: PaymentId, payment_hash: PaymentHash, route_params: &mut RouteParameters,
+ paths: Vec<Vec<RouteHop>>, path_results: I, pending_events: &Mutex<Vec<events::Event>>
) {
let mut events = pending_events.lock().unwrap();
debug_assert_eq!(paths.len(), path_results.len());
let failed_scid = if let APIError::InvalidRoute { .. } = e {
None
} else {
- Some(path[0].short_channel_id)
+ let scid = path[0].short_channel_id;
+ route_params.payment_params.previously_failed_channels.push(scid);
+ Some(scid)
};
events.push(events::Event::PaymentPathFailed {
payment_id: Some(payment_id),
}
}
- pub(super) fn retry_payment_with_route<ES: Deref, NS: Deref, F>(
- &self, route: &Route, payment_id: PaymentId, entropy_source: &ES, node_signer: &NS, best_block_height: u32,
- send_payment_along_path: F
- ) -> Result<(), PaymentSendFailure>
- where
- ES::Target: EntropySource,
- NS::Target: NodeSigner,
- F: Fn(&Vec<RouteHop>, &Option<PaymentParameters>, &PaymentHash, &Option<PaymentSecret>, u64,
- u32, PaymentId, &Option<PaymentPreimage>, [u8; 32]) -> Result<(), APIError>
- {
- const RETRY_OVERFLOW_PERCENTAGE: u64 = 10;
- for path in route.paths.iter() {
- if path.len() == 0 {
- return Err(PaymentSendFailure::ParameterError(APIError::APIMisuseError {
- err: "length-0 path in route".to_string()
- }))
- }
- }
-
- let mut onion_session_privs = Vec::with_capacity(route.paths.len());
- for _ in 0..route.paths.len() {
- onion_session_privs.push(entropy_source.get_secure_random_bytes());
- }
-
- let (total_msat, payment_hash, payment_secret, keysend_preimage) = {
- let mut outbounds = self.pending_outbound_payments.lock().unwrap();
- match outbounds.get_mut(&payment_id) {
- Some(payment) => {
- let res = match payment {
- PendingOutboundPayment::Retryable {
- total_msat, payment_hash, keysend_preimage, payment_secret, pending_amt_msat, ..
- } => {
- let retry_amt_msat: u64 = route.paths.iter().map(|path| path.last().unwrap().fee_msat).sum();
- if retry_amt_msat + *pending_amt_msat > *total_msat * (100 + RETRY_OVERFLOW_PERCENTAGE) / 100 {
- return Err(PaymentSendFailure::ParameterError(APIError::APIMisuseError {
- err: format!("retry_amt_msat of {} will put pending_amt_msat (currently: {}) more than 10% over total_payment_amt_msat of {}", retry_amt_msat, pending_amt_msat, total_msat).to_string()
- }))
- }
- (*total_msat, *payment_hash, *payment_secret, *keysend_preimage)
- },
- PendingOutboundPayment::Legacy { .. } => {
- return Err(PaymentSendFailure::ParameterError(APIError::APIMisuseError {
- err: "Unable to retry payments that were initially sent on LDK versions prior to 0.0.102".to_string()
- }))
- },
- PendingOutboundPayment::Fulfilled { .. } => {
- return Err(PaymentSendFailure::ParameterError(APIError::APIMisuseError {
- err: "Payment already completed".to_owned()
- }));
- },
- PendingOutboundPayment::Abandoned { .. } => {
- return Err(PaymentSendFailure::ParameterError(APIError::APIMisuseError {
- err: "Payment already abandoned (with some HTLCs still pending)".to_owned()
- }));
- },
- };
- if !payment.is_retryable_now() {
- return Err(PaymentSendFailure::ParameterError(APIError::APIMisuseError {
- err: format!("Retries exhausted for payment id {}", log_bytes!(payment_id.0)),
- }))
- }
- payment.increment_attempts();
- for (path, session_priv_bytes) in route.paths.iter().zip(onion_session_privs.iter()) {
- assert!(payment.insert(*session_priv_bytes, path));
- }
- res
- },
- None =>
- return Err(PaymentSendFailure::ParameterError(APIError::APIMisuseError {
- err: format!("Payment with ID {} not found", log_bytes!(payment_id.0)),
- })),
- }
- };
- self.pay_route_internal(route, payment_hash, &payment_secret, keysend_preimage, payment_id, Some(total_msat), onion_session_privs, node_signer, best_block_height, &send_payment_along_path)
- }
-
pub(super) fn send_probe<ES: Deref, NS: Deref, F>(
&self, hops: Vec<RouteHop>, probing_cookie_secret: [u8; 32], entropy_source: &ES,
node_signer: &NS, best_block_height: u32, send_payment_along_path: F
&Route { paths: vec![], payment_params: None }, Some(Retry::Attempts(1)),
Some(expired_route_params.payment_params.clone()), &&keys_manager, 0).unwrap();
outbound_payments.retry_payment_internal(
- PaymentId([0; 32]), PaymentHash([0; 32]), expired_route_params, &&router, vec![],
- &|| InFlightHtlcs::new(), &&keys_manager, &&keys_manager, 0, &&logger, &pending_events,
+ PaymentId([0; 32]), expired_route_params, &&router, vec![], &|| InFlightHtlcs::new(),
+ &&keys_manager, &&keys_manager, 0, &&logger, &pending_events,
&|_, _, _, _, _, _, _, _, _| Ok(()));
let events = pending_events.lock().unwrap();
assert_eq!(events.len(), 1);
&Route { paths: vec![], payment_params: None }, Some(Retry::Attempts(1)),
Some(route_params.payment_params.clone()), &&keys_manager, 0).unwrap();
outbound_payments.retry_payment_internal(
- PaymentId([0; 32]), PaymentHash([0; 32]), route_params, &&router, vec![],
- &|| InFlightHtlcs::new(), &&keys_manager, &&keys_manager, 0, &&logger, &pending_events,
+ PaymentId([0; 32]), route_params, &&router, vec![], &|| InFlightHtlcs::new(),
+ &&keys_manager, &&keys_manager, 0, &&logger, &pending_events,
&|_, _, _, _, _, _, _, _, _| Ok(()));
let events = pending_events.lock().unwrap();
assert_eq!(events.len(), 1);
projects / rust-lightning / blobdiff