use chain::chaininterface::{BroadcasterInterface,ChainListener,FeeEstimator};
use chain::transaction::OutPoint;
use ln::channel::{Channel, ChannelError};
-use ln::channelmonitor::{ChannelMonitor, ChannelMonitorUpdate, ChannelMonitorUpdateErr, ManyChannelMonitor, CLTV_CLAIM_BUFFER, LATENCY_GRACE_PERIOD_BLOCKS, ANTI_REORG_DELAY};
+use ln::channelmonitor::{ChannelMonitor, ChannelMonitorUpdate, ChannelMonitorUpdateErr, ManyChannelMonitor, CLTV_CLAIM_BUFFER, LATENCY_GRACE_PERIOD_BLOCKS, ANTI_REORG_DELAY, HTLC_FAIL_BACK_BUFFER};
use ln::features::{InitFeatures, NodeFeatures};
-use ln::router::Route;
+use ln::router::{Route, RouteHop};
use ln::msgs;
use ln::onion_utils;
use ln::msgs::{ChannelMessageHandler, DecodeError, LightningError};
onion_packet: msgs::OnionPacket,
short_channel_id: u64, // This should be NonZero<u64> eventually when we bump MSRV
},
- Receive {},
+ Receive {
+ payment_data: Option<msgs::FinalOnionHopData>,
+ incoming_cltv_expiry: u32, // Used to track when we should expire pending HTLCs that go unclaimed
+ },
}
#[derive(Clone)] // See Channel::revoke_and_ack for why, tl;dr: Rust bug
incoming_packet_shared_secret: [u8; 32],
}
+struct ClaimableHTLC {
+ prev_hop: HTLCPreviousHopData,
+ value: u64,
+ /// Filled in when the HTLC was received with a payment_secret packet, which contains a
+ /// total_msat (which may differ from value if this is a Multi-Path Payment) and a
+ /// payment_secret which prevents path-probing attacks and can associate different HTLCs which
+ /// are part of the same payment.
+ payment_data: Option<msgs::FinalOnionHopData>,
+ cltv_expiry: u32,
+}
+
/// Tracks the inbound corresponding to an outbound HTLC
#[derive(Clone, PartialEq)]
pub(super) enum HTLCSource {
PreviousHopData(HTLCPreviousHopData),
OutboundRoute {
- route: Route,
+ path: Vec<RouteHop>,
session_priv: SecretKey,
/// Technically we can recalculate this from the route, but we cache it here to avoid
/// doing a double-pass on route when we get a failure back
impl HTLCSource {
pub fn dummy() -> Self {
HTLCSource::OutboundRoute {
- route: Route { hops: Vec::new() },
+ path: Vec::new(),
session_priv: SecretKey::from_slice(&[1; 32]).unwrap(),
first_hop_htlc_msat: 0,
}
/// payment_preimage type, use to route payment between hop
#[derive(Hash, Copy, Clone, PartialEq, Eq, Debug)]
pub struct PaymentPreimage(pub [u8;32]);
+/// payment_secret type, use to authenticate sender to the receiver and tie MPP HTLCs together
+#[derive(Hash, Copy, Clone, PartialEq, Eq, Debug)]
+pub struct PaymentSecret(pub [u8;32]);
type ShutdownResult = (Option<OutPoint>, ChannelMonitorUpdate, Vec<(HTLCSource, PaymentHash)>);
/// guarantees are made about the existence of a channel with the short id here, nor the short
/// ids in the PendingHTLCInfo!
pub(super) forward_htlcs: HashMap<u64, Vec<HTLCForwardInfo>>,
- /// payment_hash -> Vec<(amount_received, htlc_source)> for tracking things that were to us and
- /// can be failed/claimed by the user
+ /// (payment_hash, payment_secret) -> Vec<HTLCs> for tracking HTLCs that
+ /// were to us and can be failed/claimed by the user
/// Note that while this is held in the same mutex as the channels themselves, no consistency
/// guarantees are made about the channels given here actually existing anymore by the time you
/// go to read them!
- pub(super) claimable_htlcs: HashMap<PaymentHash, Vec<(u64, HTLCPreviousHopData)>>,
+ claimable_htlcs: HashMap<(PaymentHash, Option<PaymentSecret>), Vec<ClaimableHTLC>>,
/// Messages to send to peers - pushed to in the same lock that they are generated in (except
/// for broadcast messages, where ordering isn't as strict).
pub(super) pending_msg_events: Vec<events::MessageSendEvent>,
#[allow(dead_code)]
const CHECK_CLTV_EXPIRY_SANITY_2: u32 = CLTV_EXPIRY_DELTA as u32 - LATENCY_GRACE_PERIOD_BLOCKS - 2*CLTV_CLAIM_BUFFER;
-macro_rules! secp_call {
- ( $res: expr, $err: expr ) => {
- match $res {
- Ok(key) => key,
- Err(_) => return Err($err),
- }
- };
-}
-
/// Details of a channel, as returned by ChannelManager::list_channels and ChannelManager::list_usable_channels
pub struct ChannelDetails {
/// The channel's ID (prior to funding transaction generation, this is a random 32 bytes,
pub is_live: bool,
}
+/// If a payment fails to send, it can be in one of several states. This enum is returned as the
+/// Err() type describing which state the payment is in, see the description of individual enum
+/// states for more.
+#[derive(Debug)]
+pub enum PaymentSendFailure {
+ /// A parameter which was passed to send_payment was invalid, preventing us from attempting to
+ /// send the payment at all. No channel state has been changed or messages sent to peers, and
+ /// once you've changed the parameter at error, you can freely retry the payment in full.
+ ParameterError(APIError),
+ /// A parameter in a single path which was passed to send_payment was invalid, preventing us
+ /// from attempting to send the payment at all. No channel state has been changed or messages
+ /// sent to peers, and once you've changed the parameter at error, you can freely retry the
+ /// payment in full.
+ ///
+ /// The results here are ordered the same as the paths in the route object which was passed to
+ /// send_payment.
+ PathParameterError(Vec<Result<(), APIError>>),
+ /// All paths which were attempted failed to send, with no channel state change taking place.
+ /// You can freely retry the payment in full (though you probably want to do so over different
+ /// paths than the ones selected).
+ AllFailedRetrySafe(Vec<APIError>),
+ /// Some paths which were attempted failed to send, though possibly not all. At least some
+ /// paths have irrevocably committed to the HTLC and retrying the payment in full would result
+ /// in over-/re-payment.
+ ///
+ /// The results here are ordered the same as the paths in the route object which was passed to
+ /// send_payment, and any Errs which are not APIError::MonitorUpdateFailed can be safely
+ /// retried (though there is currently no API with which to do so).
+ ///
+ /// Any entries which contain Err(APIError::MonitorUpdateFailed) or Ok(()) MUST NOT be retried
+ /// as they will result in over-/re-payment. These HTLCs all either successfully sent (in the
+ /// case of Ok(())) or will send once channel_monitor_updated is called on the next-hop channel
+ /// with the latest update_id.
+ PartialFailure(Vec<Result<(), APIError>>),
+}
+
macro_rules! handle_error {
($self: ident, $internal: expr, $their_node_id: expr) => {
match $internal {
return_err!("Upstream node set CLTV to the wrong value", 18, &byte_utils::be32_to_array(msg.cltv_expiry));
}
+ let payment_data = match next_hop_data.format {
+ msgs::OnionHopDataFormat::Legacy { .. } => None,
+ msgs::OnionHopDataFormat::NonFinalNode { .. } => return_err!("Got non final data with an HMAC of 0", 0x4000 | 22, &[0;0]),
+ msgs::OnionHopDataFormat::FinalNode { payment_data } => payment_data,
+ };
+
// Note that we could obviously respond immediately with an update_fulfill_htlc
// message, however that would leak that we are the recipient of this payment, so
// instead we stay symmetric with the forwarding case, only responding (after a
// delay) once they've send us a commitment_signed!
PendingHTLCStatus::Forward(PendingHTLCInfo {
- routing: PendingHTLCRouting::Receive {},
+ routing: PendingHTLCRouting::Receive {
+ payment_data,
+ incoming_cltv_expiry: msg.cltv_expiry,
+ },
payment_hash: msg.payment_hash.clone(),
incoming_shared_secret: shared_secret,
amt_to_forward: next_hop_data.amt_to_forward,
})
}
- /// Sends a payment along a given route.
- ///
- /// Value parameters are provided via the last hop in route, see documentation for RouteHop
- /// fields for more info.
- ///
- /// Note that if the payment_hash already exists elsewhere (eg you're sending a duplicative
- /// payment), we don't do anything to stop you! We always try to ensure that if the provided
- /// next hop knows the preimage to payment_hash they can claim an additional amount as
- /// specified in the last hop in the route! Thus, you should probably do your own
- /// payment_preimage tracking (which you should already be doing as they represent "proof of
- /// payment") and prevent double-sends yourself.
- ///
- /// May generate a SendHTLCs message event on success, which should be relayed.
- ///
- /// Raises APIError::RoutError when invalid route or forward parameter
- /// (cltv_delta, fee, node public key) is specified.
- /// Raises APIError::ChannelUnavailable if the next-hop channel is not available for updates
- /// (including due to previous monitor update failure or new permanent monitor update failure).
- /// Raised APIError::MonitorUpdateFailed if a new monitor update failure prevented sending the
- /// relevant updates.
- ///
- /// In case of APIError::RouteError/APIError::ChannelUnavailable, the payment send has failed
- /// and you may wish to retry via a different route immediately.
- /// In case of APIError::MonitorUpdateFailed, the commitment update has been irrevocably
- /// committed on our end and we're just waiting for a monitor update to send it. Do NOT retry
- /// the payment via a different route unless you intend to pay twice!
- pub fn send_payment(&self, route: Route, payment_hash: PaymentHash) -> Result<(), APIError> {
- if route.hops.len() < 1 || route.hops.len() > 20 {
- return Err(APIError::RouteError{err: "Route didn't go anywhere/had bogus size"});
- }
- let our_node_id = self.get_our_node_id();
- for (idx, hop) in route.hops.iter().enumerate() {
- if idx != route.hops.len() - 1 && hop.pubkey == our_node_id {
- return Err(APIError::RouteError{err: "Route went through us but wasn't a simple rebalance loop to us"});
- }
- }
-
+ // Only public for testing, this should otherwise never be called direcly
+ pub(crate) fn send_payment_along_path(&self, path: &Vec<RouteHop>, payment_hash: &PaymentHash, payment_secret: &Option<PaymentSecret>, total_value: u64, cur_height: u32) -> Result<(), APIError> {
+ log_trace!(self, "Attempting to send payment for path with next hop {}", path.first().unwrap().short_channel_id);
let (session_priv, prng_seed) = self.keys_manager.get_onion_rand();
- let cur_height = self.latest_block_height.load(Ordering::Acquire) as u32 + 1;
-
- let onion_keys = secp_call!(onion_utils::construct_onion_keys(&self.secp_ctx, &route, &session_priv),
- APIError::RouteError{err: "Pubkey along hop was maliciously selected"});
- let (onion_payloads, htlc_msat, htlc_cltv) = onion_utils::build_onion_payloads(&route, cur_height)?;
+ let onion_keys = onion_utils::construct_onion_keys(&self.secp_ctx, &path, &session_priv)
+ .map_err(|_| APIError::RouteError{err: "Pubkey along hop was maliciously selected"})?;
+ let (onion_payloads, htlc_msat, htlc_cltv) = onion_utils::build_onion_payloads(path, total_value, payment_secret, cur_height)?;
if onion_utils::route_size_insane(&onion_payloads) {
return Err(APIError::RouteError{err: "Route size too large considering onion data"});
}
- let onion_packet = onion_utils::construct_onion_packet(onion_payloads, onion_keys, prng_seed, &payment_hash);
+ let onion_packet = onion_utils::construct_onion_packet(onion_payloads, onion_keys, prng_seed, payment_hash);
let _ = self.total_consistency_lock.read().unwrap();
let err: Result<(), _> = loop {
let mut channel_lock = self.channel_state.lock().unwrap();
- let id = match channel_lock.short_to_id.get(&route.hops.first().unwrap().short_channel_id) {
+ let id = match channel_lock.short_to_id.get(&path.first().unwrap().short_channel_id) {
None => return Err(APIError::ChannelUnavailable{err: "No channel available with first hop!"}),
Some(id) => id.clone(),
};
let channel_state = &mut *channel_lock;
if let hash_map::Entry::Occupied(mut chan) = channel_state.by_id.entry(id) {
match {
- if chan.get().get_their_node_id() != route.hops.first().unwrap().pubkey {
+ if chan.get().get_their_node_id() != path.first().unwrap().pubkey {
return Err(APIError::RouteError{err: "Node ID mismatch on first hop!"});
}
if !chan.get().is_live() {
return Err(APIError::ChannelUnavailable{err: "Peer for first hop currently disconnected/pending monitor update!"});
}
break_chan_entry!(self, chan.get_mut().send_htlc_and_commit(htlc_msat, payment_hash.clone(), htlc_cltv, HTLCSource::OutboundRoute {
- route: route.clone(),
+ path: path.clone(),
session_priv: session_priv.clone(),
first_hop_htlc_msat: htlc_msat,
}, onion_packet), channel_state, chan)
if let Err(e) = self.monitor.update_monitor(chan.get().get_funding_txo().unwrap(), monitor_update) {
maybe_break_monitor_err!(self, e, channel_state, chan, RAACommitmentOrder::CommitmentFirst, false, true);
// Note that MonitorUpdateFailed here indicates (per function docs)
- // that we will resent the commitment update once we unfree monitor
- // updating, so we have to take special care that we don't return
- // something else in case we will resend later!
+ // that we will resend the commitment update once monitor updating
+ // is restored. Therefore, we must return an error indicating that
+ // it is unsafe to retry the payment wholesale, which we do in the
+ // send_payment check for MonitorUpdateFailed, below.
return Err(APIError::MonitorUpdateFailed);
}
channel_state.pending_msg_events.push(events::MessageSendEvent::UpdateHTLCs {
- node_id: route.hops.first().unwrap().pubkey,
+ node_id: path.first().unwrap().pubkey,
updates: msgs::CommitmentUpdate {
update_add_htlcs: vec![update_add],
update_fulfill_htlcs: Vec::new(),
return Ok(());
};
- match handle_error!(self, err, route.hops.first().unwrap().pubkey) {
+ match handle_error!(self, err, path.first().unwrap().pubkey) {
Ok(_) => unreachable!(),
- Err(e) => { Err(APIError::ChannelUnavailable { err: e.err }) }
+ Err(e) => {
+ Err(APIError::ChannelUnavailable { err: e.err })
+ },
+ }
+ }
+
+ /// Sends a payment along a given route.
+ ///
+ /// Value parameters are provided via the last hop in route, see documentation for RouteHop
+ /// fields for more info.
+ ///
+ /// Note that if the payment_hash already exists elsewhere (eg you're sending a duplicative
+ /// payment), we don't do anything to stop you! We always try to ensure that if the provided
+ /// next hop knows the preimage to payment_hash they can claim an additional amount as
+ /// specified in the last hop in the route! Thus, you should probably do your own
+ /// payment_preimage tracking (which you should already be doing as they represent "proof of
+ /// payment") and prevent double-sends yourself.
+ ///
+ /// May generate SendHTLCs message(s) event on success, which should be relayed.
+ ///
+ /// Each path may have a different return value, and PaymentSendValue may return a Vec with
+ /// each entry matching the corresponding-index entry in the route paths, see
+ /// PaymentSendFailure for more info.
+ ///
+ /// In general, a path may raise:
+ /// * APIError::RouteError when an invalid route or forwarding parameter (cltv_delta, fee,
+ /// node public key) is specified.
+ /// * APIError::ChannelUnavailable if the next-hop channel is not available for updates
+ /// (including due to previous monitor update failure or new permanent monitor update
+ /// failure).
+ /// * APIError::MonitorUpdateFailed if a new monitor update failure prevented sending the
+ /// relevant updates.
+ ///
+ /// Note that depending on the type of the PaymentSendFailure the HTLC may have been
+ /// irrevocably committed to on our end. In such a case, do NOT retry the payment with a
+ /// different route unless you intend to pay twice!
+ ///
+ /// payment_secret is unrelated to payment_hash (or PaymentPreimage) and exists to authenticate
+ /// the sender to the recipient and prevent payment-probing (deanonymization) attacks. For
+ /// newer nodes, it will be provided to you in the invoice. If you do not have one, the Route
+ /// must not contain multiple paths as multi-path payments require a recipient-provided
+ /// payment_secret.
+ /// If a payment_secret *is* provided, we assume that the invoice had the payment_secret feature
+ /// bit set (either as required or as available). If multiple paths are present in the Route,
+ /// we assume the invoice had the basic_mpp feature set.
+ pub fn send_payment(&self, route: &Route, payment_hash: PaymentHash, payment_secret: &Option<PaymentSecret>) -> Result<(), PaymentSendFailure> {
+ if route.paths.len() < 1 {
+ return Err(PaymentSendFailure::ParameterError(APIError::RouteError{err: "There must be at least one path to send over"}));
+ }
+ if route.paths.len() > 10 {
+ // This limit is completely arbitrary - there aren't any real fundamental path-count
+ // limits. After we support retrying individual paths we should likely bump this, but
+ // for now more than 10 paths likely carries too much one-path failure.
+ return Err(PaymentSendFailure::ParameterError(APIError::RouteError{err: "Sending over more than 10 paths is not currently supported"}));
+ }
+ let mut total_value = 0;
+ let our_node_id = self.get_our_node_id();
+ let mut path_errs = Vec::with_capacity(route.paths.len());
+ 'path_check: for path in route.paths.iter() {
+ if path.len() < 1 || path.len() > 20 {
+ path_errs.push(Err(APIError::RouteError{err: "Path didn't go anywhere/had bogus size"}));
+ continue 'path_check;
+ }
+ for (idx, hop) in path.iter().enumerate() {
+ if idx != path.len() - 1 && hop.pubkey == our_node_id {
+ path_errs.push(Err(APIError::RouteError{err: "Path went through us but wasn't a simple rebalance loop to us"}));
+ continue 'path_check;
+ }
+ }
+ total_value += path.last().unwrap().fee_msat;
+ path_errs.push(Ok(()));
+ }
+ if path_errs.iter().any(|e| e.is_err()) {
+ return Err(PaymentSendFailure::PathParameterError(path_errs));
+ }
+
+ let cur_height = self.latest_block_height.load(Ordering::Acquire) as u32 + 1;
+ let mut results = Vec::new();
+ for path in route.paths.iter() {
+ results.push(self.send_payment_along_path(&path, &payment_hash, payment_secret, total_value, cur_height));
+ }
+ let mut has_ok = false;
+ let mut has_err = false;
+ for res in results.iter() {
+ if res.is_ok() { has_ok = true; }
+ if res.is_err() { has_err = true; }
+ if let &Err(APIError::MonitorUpdateFailed) = res {
+ // MonitorUpdateFailed is inherently unsafe to retry, so we call it a
+ // PartialFailure.
+ has_err = true;
+ has_ok = true;
+ break;
+ }
+ }
+ if has_err && has_ok {
+ Err(PaymentSendFailure::PartialFailure(results))
+ } else if has_err {
+ Err(PaymentSendFailure::AllFailedRetrySafe(results.drain(..).map(|r| r.unwrap_err()).collect()))
+ } else {
+ Ok(())
}
}
pub fn funding_transaction_generated(&self, temporary_channel_id: &[u8; 32], funding_txo: OutPoint) {
let _ = self.total_consistency_lock.read().unwrap();
- let (mut chan, msg, chan_monitor) = {
+ let (chan, msg) = {
let (res, chan) = match self.channel_state.lock().unwrap().by_id.remove(temporary_channel_id) {
Some(mut chan) => {
(chan.get_outbound_funding_created(funding_txo)
};
match handle_error!(self, res, chan.get_their_node_id()) {
Ok(funding_msg) => {
- (chan, funding_msg.0, funding_msg.1)
+ (chan, funding_msg)
},
Err(_) => { return; }
}
};
- // Because we have exclusive ownership of the channel here we can release the channel_state
- // lock before add_monitor
- if let Err(e) = self.monitor.add_monitor(chan_monitor.get_funding_txo().unwrap(), chan_monitor) {
- match e {
- ChannelMonitorUpdateErr::PermanentFailure => {
- match handle_error!(self, Err(MsgHandleErrInternal::from_finish_shutdown("ChannelMonitor storage failure", *temporary_channel_id, chan.force_shutdown(true), None)), chan.get_their_node_id()) {
- Err(_) => { return; },
- Ok(()) => unreachable!(),
- }
- },
- ChannelMonitorUpdateErr::TemporaryFailure => {
- // Its completely fine to continue with a FundingCreated until the monitor
- // update is persisted, as long as we don't generate the FundingBroadcastSafe
- // until the monitor has been safely persisted (as funding broadcast is not,
- // in fact, safe).
- chan.monitor_update_failed(false, false, Vec::new(), Vec::new());
- },
- }
- }
let mut channel_state = self.channel_state.lock().unwrap();
channel_state.pending_msg_events.push(events::MessageSendEvent::SendFundingCreated {
htlc_id: prev_htlc_id,
incoming_packet_shared_secret: forward_info.incoming_shared_secret,
});
- failed_forwards.push((htlc_source, forward_info.payment_hash, 0x4000 | 10, None));
+ failed_forwards.push((htlc_source, forward_info.payment_hash,
+ HTLCFailReason::Reason { failure_code: 0x4000 | 10, data: Vec::new() }
+ ));
},
HTLCForwardInfo::FailHTLC { .. } => {
// Channel went away before we could fail it. This implies
panic!("Stated return value requirements in send_htlc() were not met");
}
let chan_update = self.get_channel_update(chan.get()).unwrap();
- failed_forwards.push((htlc_source, payment_hash, 0x1000 | 7, Some(chan_update)));
+ failed_forwards.push((htlc_source, payment_hash,
+ HTLCFailReason::Reason { failure_code: 0x1000 | 7, data: chan_update.encode_with_len() }
+ ));
continue;
},
Ok(update_add) => {
for forward_info in pending_forwards.drain(..) {
match forward_info {
HTLCForwardInfo::AddHTLC { prev_short_channel_id, prev_htlc_id, forward_info: PendingHTLCInfo {
- routing: PendingHTLCRouting::Receive { },
+ routing: PendingHTLCRouting::Receive { payment_data, incoming_cltv_expiry },
incoming_shared_secret, payment_hash, amt_to_forward, .. }, } => {
- let prev_hop_data = HTLCPreviousHopData {
+ let prev_hop = HTLCPreviousHopData {
short_channel_id: prev_short_channel_id,
htlc_id: prev_htlc_id,
incoming_packet_shared_secret: incoming_shared_secret,
};
- match channel_state.claimable_htlcs.entry(payment_hash) {
- hash_map::Entry::Occupied(mut entry) => entry.get_mut().push((amt_to_forward, prev_hop_data)),
- hash_map::Entry::Vacant(entry) => { entry.insert(vec![(amt_to_forward, prev_hop_data)]); },
- };
- new_events.push(events::Event::PaymentReceived {
- payment_hash: payment_hash,
- amt: amt_to_forward,
+
+ let mut total_value = 0;
+ let payment_secret_opt =
+ if let &Some(ref data) = &payment_data { Some(data.payment_secret.clone()) } else { None };
+ let htlcs = channel_state.claimable_htlcs.entry((payment_hash, payment_secret_opt))
+ .or_insert(Vec::new());
+ htlcs.push(ClaimableHTLC {
+ prev_hop,
+ value: amt_to_forward,
+ payment_data: payment_data.clone(),
+ cltv_expiry: incoming_cltv_expiry,
});
+ if let &Some(ref data) = &payment_data {
+ for htlc in htlcs.iter() {
+ total_value += htlc.value;
+ if htlc.payment_data.as_ref().unwrap().total_msat != data.total_msat {
+ total_value = msgs::MAX_VALUE_MSAT;
+ }
+ if total_value >= msgs::MAX_VALUE_MSAT { break; }
+ }
+ if total_value >= msgs::MAX_VALUE_MSAT || total_value > data.total_msat {
+ for htlc in htlcs.iter() {
+ let mut htlc_msat_height_data = byte_utils::be64_to_array(htlc.value).to_vec();
+ htlc_msat_height_data.extend_from_slice(
+ &byte_utils::be32_to_array(
+ self.latest_block_height.load(Ordering::Acquire)
+ as u32,
+ ),
+ );
+ failed_forwards.push((HTLCSource::PreviousHopData(HTLCPreviousHopData {
+ short_channel_id: htlc.prev_hop.short_channel_id,
+ htlc_id: htlc.prev_hop.htlc_id,
+ incoming_packet_shared_secret: htlc.prev_hop.incoming_packet_shared_secret,
+ }), payment_hash,
+ HTLCFailReason::Reason { failure_code: 0x4000 | 15, data: htlc_msat_height_data }
+ ));
+ }
+ } else if total_value == data.total_msat {
+ new_events.push(events::Event::PaymentReceived {
+ payment_hash: payment_hash,
+ payment_secret: Some(data.payment_secret),
+ amt: total_value,
+ });
+ }
+ } else {
+ new_events.push(events::Event::PaymentReceived {
+ payment_hash: payment_hash,
+ payment_secret: None,
+ amt: amt_to_forward,
+ });
+ }
},
HTLCForwardInfo::AddHTLC { .. } => {
panic!("short_channel_id == 0 should imply any pending_forward entries are of type Receive");
}
}
- for (htlc_source, payment_hash, failure_code, update) in failed_forwards.drain(..) {
- match update {
- None => self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), htlc_source, &payment_hash, HTLCFailReason::Reason { failure_code, data: Vec::new() }),
- Some(chan_update) => self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), htlc_source, &payment_hash, HTLCFailReason::Reason { failure_code, data: chan_update.encode_with_len() }),
- };
+ for (htlc_source, payment_hash, failure_reason) in failed_forwards.drain(..) {
+ self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), htlc_source, &payment_hash, failure_reason);
}
for (their_node_id, err) in handle_errors.drain(..) {
/// along the path (including in our own channel on which we received it).
/// Returns false if no payment was found to fail backwards, true if the process of failing the
/// HTLC backwards has been started.
- pub fn fail_htlc_backwards(&self, payment_hash: &PaymentHash) -> bool {
+ pub fn fail_htlc_backwards(&self, payment_hash: &PaymentHash, payment_secret: &Option<PaymentSecret>) -> bool {
let _ = self.total_consistency_lock.read().unwrap();
let mut channel_state = Some(self.channel_state.lock().unwrap());
- let removed_source = channel_state.as_mut().unwrap().claimable_htlcs.remove(payment_hash);
+ let removed_source = channel_state.as_mut().unwrap().claimable_htlcs.remove(&(*payment_hash, *payment_secret));
if let Some(mut sources) = removed_source {
- for (recvd_value, htlc_with_hash) in sources.drain(..) {
+ for htlc in sources.drain(..) {
if channel_state.is_none() { channel_state = Some(self.channel_state.lock().unwrap()); }
+ let mut htlc_msat_height_data = byte_utils::be64_to_array(htlc.value).to_vec();
+ htlc_msat_height_data.extend_from_slice(&byte_utils::be32_to_array(
+ self.latest_block_height.load(Ordering::Acquire) as u32,
+ ));
self.fail_htlc_backwards_internal(channel_state.take().unwrap(),
- HTLCSource::PreviousHopData(htlc_with_hash), payment_hash,
- HTLCFailReason::Reason { failure_code: 0x4000 | 15, data: byte_utils::be64_to_array(recvd_value).to_vec() });
+ HTLCSource::PreviousHopData(htlc.prev_hop), payment_hash,
+ HTLCFailReason::Reason { failure_code: 0x4000 | 15, data: htlc_msat_height_data });
}
true
} else { false }
//between the branches here. We should make this async and move it into the forward HTLCs
//timer handling.
match source {
- HTLCSource::OutboundRoute { ref route, .. } => {
+ HTLCSource::OutboundRoute { ref path, .. } => {
log_trace!(self, "Failing outbound payment HTLC with payment_hash {}", log_bytes!(payment_hash.0));
mem::drop(channel_state_lock);
match &onion_error {
&HTLCFailReason::LightningError { ref err } => {
#[cfg(test)]
- let (channel_update, payment_retryable, onion_error_code) = onion_utils::process_onion_failure(&self.secp_ctx, &self.logger, &source, err.data.clone());
+ let (channel_update, payment_retryable, onion_error_code, onion_error_data) = onion_utils::process_onion_failure(&self.secp_ctx, &self.logger, &source, err.data.clone());
#[cfg(not(test))]
- let (channel_update, payment_retryable, _) = onion_utils::process_onion_failure(&self.secp_ctx, &self.logger, &source, err.data.clone());
+ let (channel_update, payment_retryable, _, _) = onion_utils::process_onion_failure(&self.secp_ctx, &self.logger, &source, err.data.clone());
// TODO: If we decided to blame ourselves (or one of our channels) in
// process_onion_failure we should close that channel as it implies our
// next-hop is needlessly blaming us!
payment_hash: payment_hash.clone(),
rejected_by_dest: !payment_retryable,
#[cfg(test)]
- error_code: onion_error_code
+ error_code: onion_error_code,
+#[cfg(test)]
+ error_data: onion_error_data
}
);
},
&HTLCFailReason::Reason {
#[cfg(test)]
ref failure_code,
+#[cfg(test)]
+ ref data,
.. } => {
// we get a fail_malformed_htlc from the first hop
// TODO: We'd like to generate a PaymentFailureNetworkUpdate for temporary
self.pending_events.lock().unwrap().push(
events::Event::PaymentFailed {
payment_hash: payment_hash.clone(),
- rejected_by_dest: route.hops.len() == 1,
+ rejected_by_dest: path.len() == 1,
#[cfg(test)]
error_code: Some(*failure_code),
+#[cfg(test)]
+ error_data: Some(data.clone()),
}
);
}
/// privacy-breaking recipient-probing attacks which may reveal payment activity to
/// motivated attackers.
///
+ /// Note that the privacy concerns in (b) are not relevant in payments with a payment_secret
+ /// set. Thus, for such payments we will claim any payments which do not under-pay.
+ ///
/// May panic if called except in response to a PaymentReceived event.
- pub fn claim_funds(&self, payment_preimage: PaymentPreimage, expected_amount: u64) -> bool {
+ pub fn claim_funds(&self, payment_preimage: PaymentPreimage, payment_secret: &Option<PaymentSecret>, expected_amount: u64) -> bool {
let payment_hash = PaymentHash(Sha256::hash(&payment_preimage.0).into_inner());
let _ = self.total_consistency_lock.read().unwrap();
let mut channel_state = Some(self.channel_state.lock().unwrap());
- let removed_source = channel_state.as_mut().unwrap().claimable_htlcs.remove(&payment_hash);
+ let removed_source = channel_state.as_mut().unwrap().claimable_htlcs.remove(&(payment_hash, *payment_secret));
if let Some(mut sources) = removed_source {
- for (received_amount, htlc_with_hash) in sources.drain(..) {
+ assert!(!sources.is_empty());
+
+ // If we are claiming an MPP payment, we have to take special care to ensure that each
+ // channel exists before claiming all of the payments (inside one lock).
+ // Note that channel existance is sufficient as we should always get a monitor update
+ // which will take care of the real HTLC claim enforcement.
+ //
+ // If we find an HTLC which we would need to claim but for which we do not have a
+ // channel, we will fail all parts of the MPP payment. While we could wait and see if
+ // the sender retries the already-failed path(s), it should be a pretty rare case where
+ // we got all the HTLCs and then a channel closed while we were waiting for the user to
+ // provide the preimage, so worrying too much about the optimal handling isn't worth
+ // it.
+
+ let (is_mpp, mut valid_mpp) = if let &Some(ref data) = &sources[0].payment_data {
+ assert!(payment_secret.is_some());
+ (true, data.total_msat >= expected_amount)
+ } else {
+ assert!(payment_secret.is_none());
+ (false, false)
+ };
+
+ for htlc in sources.iter() {
+ if !is_mpp || !valid_mpp { break; }
+ if let None = channel_state.as_ref().unwrap().short_to_id.get(&htlc.prev_hop.short_channel_id) {
+ valid_mpp = false;
+ }
+ }
+
+ let mut errs = Vec::new();
+ let mut claimed_any_htlcs = false;
+ for htlc in sources.drain(..) {
if channel_state.is_none() { channel_state = Some(self.channel_state.lock().unwrap()); }
- if received_amount < expected_amount || received_amount > expected_amount * 2 {
- let mut htlc_msat_data = byte_utils::be64_to_array(received_amount).to_vec();
- let mut height_data = byte_utils::be32_to_array(self.latest_block_height.load(Ordering::Acquire) as u32).to_vec();
- htlc_msat_data.append(&mut height_data);
+ if (is_mpp && !valid_mpp) || (!is_mpp && (htlc.value < expected_amount || htlc.value > expected_amount * 2)) {
+ let mut htlc_msat_height_data = byte_utils::be64_to_array(htlc.value).to_vec();
+ htlc_msat_height_data.extend_from_slice(&byte_utils::be32_to_array(
+ self.latest_block_height.load(Ordering::Acquire) as u32,
+ ));
self.fail_htlc_backwards_internal(channel_state.take().unwrap(),
- HTLCSource::PreviousHopData(htlc_with_hash), &payment_hash,
- HTLCFailReason::Reason { failure_code: 0x4000|15, data: htlc_msat_data });
+ HTLCSource::PreviousHopData(htlc.prev_hop), &payment_hash,
+ HTLCFailReason::Reason { failure_code: 0x4000|15, data: htlc_msat_height_data });
} else {
- self.claim_funds_internal(channel_state.take().unwrap(), HTLCSource::PreviousHopData(htlc_with_hash), payment_preimage);
+ match self.claim_funds_from_hop(channel_state.as_mut().unwrap(), htlc.prev_hop, payment_preimage) {
+ Err(Some(e)) => {
+ if let msgs::ErrorAction::IgnoreError = e.1.err.action {
+ // We got a temporary failure updating monitor, but will claim the
+ // HTLC when the monitor updating is restored (or on chain).
+ log_error!(self, "Temporary failure claiming HTLC, treating as success: {}", e.1.err.err);
+ claimed_any_htlcs = true;
+ } else { errs.push(e); }
+ },
+ Err(None) if is_mpp => unreachable!("We already checked for channel existence, we can't fail here!"),
+ Err(None) => {
+ log_warn!(self, "Channel we expected to claim an HTLC from was closed.");
+ },
+ Ok(()) => claimed_any_htlcs = true,
+ }
}
}
- true
+
+ // Now that we've done the entire above loop in one lock, we can handle any errors
+ // which were generated.
+ channel_state.take();
+
+ for (their_node_id, err) in errs.drain(..) {
+ let res: Result<(), _> = Err(err);
+ let _ = handle_error!(self, res, their_node_id);
+ }
+
+ claimed_any_htlcs
} else { false }
}
- fn claim_funds_internal(&self, mut channel_state_lock: MutexGuard<ChannelHolder<ChanSigner>>, source: HTLCSource, payment_preimage: PaymentPreimage) {
- let (their_node_id, err) = loop {
- match source {
- HTLCSource::OutboundRoute { .. } => {
- mem::drop(channel_state_lock);
- let mut pending_events = self.pending_events.lock().unwrap();
- pending_events.push(events::Event::PaymentSent {
- payment_preimage
- });
- },
- HTLCSource::PreviousHopData(HTLCPreviousHopData { short_channel_id, htlc_id, .. }) => {
- //TODO: Delay the claimed_funds relaying just like we do outbound relay!
- let channel_state = &mut *channel_state_lock;
- let chan_id = match channel_state.short_to_id.get(&short_channel_id) {
- Some(chan_id) => chan_id.clone(),
- None => {
- // TODO: There is probably a channel manager somewhere that needs to
- // learn the preimage as the channel already hit the chain and that's
- // why it's missing.
- return
- }
- };
+ fn claim_funds_from_hop(&self, channel_state_lock: &mut MutexGuard<ChannelHolder<ChanSigner>>, prev_hop: HTLCPreviousHopData, payment_preimage: PaymentPreimage) -> Result<(), Option<(PublicKey, MsgHandleErrInternal)>> {
+ //TODO: Delay the claimed_funds relaying just like we do outbound relay!
+ let channel_state = &mut **channel_state_lock;
+ let chan_id = match channel_state.short_to_id.get(&prev_hop.short_channel_id) {
+ Some(chan_id) => chan_id.clone(),
+ None => {
+ return Err(None)
+ }
+ };
- if let hash_map::Entry::Occupied(mut chan) = channel_state.by_id.entry(chan_id) {
- let was_frozen_for_monitor = chan.get().is_awaiting_monitor_update();
- match chan.get_mut().get_update_fulfill_htlc_and_commit(htlc_id, payment_preimage) {
- Ok((msgs, monitor_option)) => {
- if let Some(monitor_update) = monitor_option {
- if let Err(e) = self.monitor.update_monitor(chan.get().get_funding_txo().unwrap(), monitor_update) {
- if was_frozen_for_monitor {
- assert!(msgs.is_none());
- } else {
- break (chan.get().get_their_node_id(), handle_monitor_err!(self, e, channel_state, chan, RAACommitmentOrder::CommitmentFirst, false, msgs.is_some()));
- }
- }
- }
- if let Some((msg, commitment_signed)) = msgs {
- channel_state.pending_msg_events.push(events::MessageSendEvent::UpdateHTLCs {
- node_id: chan.get().get_their_node_id(),
- updates: msgs::CommitmentUpdate {
- update_add_htlcs: Vec::new(),
- update_fulfill_htlcs: vec![msg],
- update_fail_htlcs: Vec::new(),
- update_fail_malformed_htlcs: Vec::new(),
- update_fee: None,
- commitment_signed,
- }
- });
- }
- },
- Err(_e) => {
- // TODO: There is probably a channel manager somewhere that needs to
- // learn the preimage as the channel may be about to hit the chain.
- //TODO: Do something with e?
- return
- },
+ if let hash_map::Entry::Occupied(mut chan) = channel_state.by_id.entry(chan_id) {
+ let was_frozen_for_monitor = chan.get().is_awaiting_monitor_update();
+ match chan.get_mut().get_update_fulfill_htlc_and_commit(prev_hop.htlc_id, payment_preimage) {
+ Ok((msgs, monitor_option)) => {
+ if let Some(monitor_update) = monitor_option {
+ if let Err(e) = self.monitor.update_monitor(chan.get().get_funding_txo().unwrap(), monitor_update) {
+ if was_frozen_for_monitor {
+ assert!(msgs.is_none());
+ } else {
+ return Err(Some((chan.get().get_their_node_id(), handle_monitor_err!(self, e, channel_state, chan, RAACommitmentOrder::CommitmentFirst, false, msgs.is_some()).unwrap_err())));
+ }
}
- } else { unreachable!(); }
+ }
+ if let Some((msg, commitment_signed)) = msgs {
+ channel_state.pending_msg_events.push(events::MessageSendEvent::UpdateHTLCs {
+ node_id: chan.get().get_their_node_id(),
+ updates: msgs::CommitmentUpdate {
+ update_add_htlcs: Vec::new(),
+ update_fulfill_htlcs: vec![msg],
+ update_fail_htlcs: Vec::new(),
+ update_fail_malformed_htlcs: Vec::new(),
+ update_fee: None,
+ commitment_signed,
+ }
+ });
+ }
+ return Ok(())
+ },
+ Err(e) => {
+ // TODO: Do something with e?
+ // This should only occur if we are claiming an HTLC at the same time as the
+ // HTLC is being failed (eg because a block is being connected and this caused
+ // an HTLC to time out). This should, of course, only occur if the user is the
+ // one doing the claiming (as it being a part of a peer claim would imply we're
+ // about to lose funds) and only if the lock in claim_funds was dropped as a
+ // previous HTLC was failed (thus not for an MPP payment).
+ debug_assert!(false, "This shouldn't be reachable except in absurdly rare cases between monitor updates and HTLC timeouts: {:?}", e);
+ return Err(None)
},
}
- return;
- };
+ } else { unreachable!(); }
+ }
- mem::drop(channel_state_lock);
- let _ = handle_error!(self, err, their_node_id);
+ fn claim_funds_internal(&self, mut channel_state_lock: MutexGuard<ChannelHolder<ChanSigner>>, source: HTLCSource, payment_preimage: PaymentPreimage) {
+ match source {
+ HTLCSource::OutboundRoute { .. } => {
+ mem::drop(channel_state_lock);
+ let mut pending_events = self.pending_events.lock().unwrap();
+ pending_events.push(events::Event::PaymentSent {
+ payment_preimage
+ });
+ },
+ HTLCSource::PreviousHopData(hop_data) => {
+ if let Err((their_node_id, err)) = match self.claim_funds_from_hop(&mut channel_state_lock, hop_data, payment_preimage) {
+ Ok(()) => Ok(()),
+ Err(None) => {
+ // TODO: There is probably a channel monitor somewhere that needs to
+ // learn the preimage as the channel already hit the chain and that's
+ // why it's missing.
+ Ok(())
+ },
+ Err(Some(res)) => Err(res),
+ } {
+ mem::drop(channel_state_lock);
+ let res: Result<(), _> = Err(err);
+ let _ = handle_error!(self, res, their_node_id);
+ }
+ },
+ }
}
/// Gets the node_id held by this ChannelManager
};
// Because we have exclusive ownership of the channel here we can release the channel_state
// lock before add_monitor
- if let Err(e) = self.monitor.add_monitor(monitor_update.get_funding_txo().unwrap(), monitor_update) {
+ if let Err(e) = self.monitor.add_monitor(monitor_update.get_funding_txo(), monitor_update) {
match e {
ChannelMonitorUpdateErr::PermanentFailure => {
// Note that we reply with the new channel_id in error messages if we gave up on the
if chan.get().get_their_node_id() != *their_node_id {
return Err(MsgHandleErrInternal::send_err_msg_no_close("Got a message for a channel from the wrong node!", msg.channel_id));
}
- let monitor_update = match chan.get_mut().funding_signed(&msg) {
- Err((None, e)) => try_chan_entry!(self, Err(e), channel_state, chan),
- Err((Some(monitor_update), e)) => {
- assert!(chan.get().is_awaiting_monitor_update());
- let _ = self.monitor.update_monitor(chan.get().get_funding_txo().unwrap(), monitor_update);
- try_chan_entry!(self, Err(e), channel_state, chan);
- unreachable!();
- },
+ let monitor = match chan.get_mut().funding_signed(&msg) {
Ok(update) => update,
+ Err(e) => try_chan_entry!(self, Err(e), channel_state, chan),
};
- if let Err(e) = self.monitor.update_monitor(chan.get().get_funding_txo().unwrap(), monitor_update) {
+ if let Err(e) = self.monitor.add_monitor(chan.get().get_funding_txo().unwrap(), monitor) {
return_monitor_err!(self, e, channel_state, chan, RAACommitmentOrder::RevokeAndACKFirst, false, false);
}
(chan.get().get_funding_txo().unwrap(), chan.get().get_user_id())
log_trace!(self, "Block {} at height {} connected with {} txn matched", header_hash, height, txn_matched.len());
let _ = self.total_consistency_lock.read().unwrap();
let mut failed_channels = Vec::new();
+ let mut timed_out_htlcs = Vec::new();
{
let mut channel_lock = self.channel_state.lock().unwrap();
let channel_state = &mut *channel_lock;
let short_to_id = &mut channel_state.short_to_id;
let pending_msg_events = &mut channel_state.pending_msg_events;
channel_state.by_id.retain(|_, channel| {
- let chan_res = channel.block_connected(header, height, txn_matched, indexes_of_txn_matched);
- if let Ok(Some(funding_locked)) = chan_res {
- pending_msg_events.push(events::MessageSendEvent::SendFundingLocked {
- node_id: channel.get_their_node_id(),
- msg: funding_locked,
- });
- if let Some(announcement_sigs) = self.get_announcement_sigs(channel) {
- log_trace!(self, "Sending funding_locked and announcement_signatures for {}", log_bytes!(channel.channel_id()));
- pending_msg_events.push(events::MessageSendEvent::SendAnnouncementSignatures {
+ let res = channel.block_connected(header, height, txn_matched, indexes_of_txn_matched);
+ if let Ok((chan_res, mut timed_out_pending_htlcs)) = res {
+ for (source, payment_hash) in timed_out_pending_htlcs.drain(..) {
+ let chan_update = self.get_channel_update(&channel).map(|u| u.encode_with_len()).unwrap(); // Cannot add/recv HTLCs before we have a short_id so unwrap is safe
+ timed_out_htlcs.push((source, payment_hash, HTLCFailReason::Reason {
+ failure_code: 0x1000 | 14, // expiry_too_soon, or at least it is now
+ data: chan_update,
+ }));
+ }
+ if let Some(funding_locked) = chan_res {
+ pending_msg_events.push(events::MessageSendEvent::SendFundingLocked {
node_id: channel.get_their_node_id(),
- msg: announcement_sigs,
+ msg: funding_locked,
});
- } else {
- log_trace!(self, "Sending funding_locked WITHOUT announcement_signatures for {}", log_bytes!(channel.channel_id()));
+ if let Some(announcement_sigs) = self.get_announcement_sigs(channel) {
+ log_trace!(self, "Sending funding_locked and announcement_signatures for {}", log_bytes!(channel.channel_id()));
+ pending_msg_events.push(events::MessageSendEvent::SendAnnouncementSignatures {
+ node_id: channel.get_their_node_id(),
+ msg: announcement_sigs,
+ });
+ } else {
+ log_trace!(self, "Sending funding_locked WITHOUT announcement_signatures for {}", log_bytes!(channel.channel_id()));
+ }
+ short_to_id.insert(channel.get_short_channel_id().unwrap(), channel.channel_id());
}
- short_to_id.insert(channel.get_short_channel_id().unwrap(), channel.channel_id());
- } else if let Err(e) = chan_res {
+ } else if let Err(e) = res {
pending_msg_events.push(events::MessageSendEvent::HandleError {
node_id: channel.get_their_node_id(),
action: msgs::ErrorAction::SendErrorMessage { msg: e },
}
true
});
+
+ channel_state.claimable_htlcs.retain(|&(ref payment_hash, _), htlcs| {
+ htlcs.retain(|htlc| {
+ // If height is approaching the number of blocks we think it takes us to get
+ // our commitment transaction confirmed before the HTLC expires, plus the
+ // number of blocks we generally consider it to take to do a commitment update,
+ // just give up on it and fail the HTLC.
+ if height >= htlc.cltv_expiry - HTLC_FAIL_BACK_BUFFER {
+ let mut htlc_msat_height_data = byte_utils::be64_to_array(htlc.value).to_vec();
+ htlc_msat_height_data.extend_from_slice(&byte_utils::be32_to_array(height));
+ timed_out_htlcs.push((HTLCSource::PreviousHopData(htlc.prev_hop.clone()), payment_hash.clone(), HTLCFailReason::Reason {
+ failure_code: 0x4000 | 15,
+ data: htlc_msat_height_data
+ }));
+ false
+ } else { true }
+ });
+ !htlcs.is_empty() // Only retain this entry if htlcs has at least one entry.
+ });
}
for failure in failed_channels.drain(..) {
self.finish_force_close_channel(failure);
}
+
+ for (source, payment_hash, reason) in timed_out_htlcs.drain(..) {
+ self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), source, &payment_hash, reason);
+ }
self.latest_block_height.store(height as usize, Ordering::Release);
*self.last_block_hash.try_lock().expect("block_(dis)connected must not be called in parallel") = header_hash;
loop {
onion_packet.write(writer)?;
short_channel_id.write(writer)?;
},
- &PendingHTLCRouting::Receive { } => {
+ &PendingHTLCRouting::Receive { ref payment_data, ref incoming_cltv_expiry } => {
1u8.write(writer)?;
+ payment_data.write(writer)?;
+ incoming_cltv_expiry.write(writer)?;
},
}
self.incoming_shared_secret.write(writer)?;
onion_packet: Readable::read(reader)?,
short_channel_id: Readable::read(reader)?,
},
- 1u8 => PendingHTLCRouting::Receive { },
+ 1u8 => PendingHTLCRouting::Receive {
+ payment_data: Readable::read(reader)?,
+ incoming_cltv_expiry: Readable::read(reader)?,
+ },
_ => return Err(DecodeError::InvalidValue),
},
incoming_shared_secret: Readable::read(reader)?,
incoming_packet_shared_secret
});
+impl_writeable!(ClaimableHTLC, 0, {
+ prev_hop,
+ value,
+ payment_data,
+ cltv_expiry
+});
+
impl Writeable for HTLCSource {
fn write<W: Writer>(&self, writer: &mut W) -> Result<(), ::std::io::Error> {
match self {
0u8.write(writer)?;
hop_data.write(writer)?;
},
- &HTLCSource::OutboundRoute { ref route, ref session_priv, ref first_hop_htlc_msat } => {
+ &HTLCSource::OutboundRoute { ref path, ref session_priv, ref first_hop_htlc_msat } => {
1u8.write(writer)?;
- route.write(writer)?;
+ path.write(writer)?;
session_priv.write(writer)?;
first_hop_htlc_msat.write(writer)?;
}
match <u8 as Readable>::read(reader)? {
0 => Ok(HTLCSource::PreviousHopData(Readable::read(reader)?)),
1 => Ok(HTLCSource::OutboundRoute {
- route: Readable::read(reader)?,
+ path: Readable::read(reader)?,
session_priv: Readable::read(reader)?,
first_hop_htlc_msat: Readable::read(reader)?,
}),
for (payment_hash, previous_hops) in channel_state.claimable_htlcs.iter() {
payment_hash.write(writer)?;
(previous_hops.len() as u64).write(writer)?;
- for &(recvd_amt, ref previous_hop) in previous_hops.iter() {
- recvd_amt.write(writer)?;
- previous_hop.write(writer)?;
+ for htlc in previous_hops.iter() {
+ htlc.write(writer)?;
}
}
let previous_hops_len: u64 = Readable::read(reader)?;
let mut previous_hops = Vec::with_capacity(cmp::min(previous_hops_len as usize, 2));
for _ in 0..previous_hops_len {
- previous_hops.push((Readable::read(reader)?, Readable::read(reader)?));
+ previous_hops.push(Readable::read(reader)?);
}
claimable_htlcs.insert(payment_hash, previous_hops);
}
projects / rust-lightning / blobdiff