/// Simple structure send back by ManyChannelMonitor in case of HTLC detected onchain from a
/// forward channel and from which info are needed to update HTLC in a backward channel.
+#[derive(Clone, PartialEq)]
pub struct HTLCUpdate {
pub(super) payment_hash: PaymentHash,
pub(super) payment_preimage: Option<PaymentPreimage>,
pub(super) source: HTLCSource
}
+impl_writeable!(HTLCUpdate, 0, { payment_hash, payment_preimage, source });
/// Simple trait indicating ability to track a set of ChannelMonitors and multiplex events between
/// them. Generally should be implemented by keeping a local SimpleManyChannelMonitor and passing
fn add_update_monitor(&self, funding_txo: OutPoint, monitor: ChannelMonitor<ChanSigner>) -> Result<(), ChannelMonitorUpdateErr>;
/// Used by ChannelManager to get list of HTLC resolved onchain and which needed to be updated
- /// with success or failure backward
- fn fetch_pending_htlc_updated(&self) -> Vec<HTLCUpdate>;
+ /// with success or failure.
+ ///
+ /// You should probably just call through to
+ /// ChannelMonitor::get_and_clear_pending_htlcs_updated() for each ChannelMonitor and return
+ /// the full list.
+ fn get_and_clear_pending_htlcs_updated(&self) -> Vec<HTLCUpdate>;
}
/// A simple implementation of a ManyChannelMonitor and ChainListener. Can be used to create a
chain_monitor: Arc<ChainWatchInterface>,
broadcaster: Arc<BroadcasterInterface>,
pending_events: Mutex<Vec<events::Event>>,
- pending_htlc_updated: Mutex<HashMap<PaymentHash, Vec<(HTLCSource, Option<PaymentPreimage>)>>>,
logger: Arc<Logger>,
fee_estimator: Arc<FeeEstimator>
}
fn block_connected(&self, header: &BlockHeader, height: u32, txn_matched: &[&Transaction], _indexes_of_txn_matched: &[u32]) {
let block_hash = header.bitcoin_hash();
let mut new_events: Vec<events::Event> = Vec::with_capacity(0);
- let mut htlc_updated_infos = Vec::new();
{
let mut monitors = self.monitors.lock().unwrap();
for monitor in monitors.values_mut() {
- let (txn_outputs, spendable_outputs, mut htlc_updated) = monitor.block_connected(txn_matched, height, &block_hash, &*self.broadcaster, &*self.fee_estimator);
+ let (txn_outputs, spendable_outputs) = monitor.block_connected(txn_matched, height, &block_hash, &*self.broadcaster, &*self.fee_estimator);
if spendable_outputs.len() > 0 {
new_events.push(events::Event::SpendableOutputs {
outputs: spendable_outputs,
self.chain_monitor.install_watch_outpoint((txid.clone(), idx as u32), &output.script_pubkey);
}
}
- htlc_updated_infos.append(&mut htlc_updated);
- }
- }
- {
- // ChannelManager will just need to fetch pending_htlc_updated and pass state backward
- let mut pending_htlc_updated = self.pending_htlc_updated.lock().unwrap();
- for htlc in htlc_updated_infos.drain(..) {
- match pending_htlc_updated.entry(htlc.2) {
- hash_map::Entry::Occupied(mut e) => {
- // In case of reorg we may have htlc outputs solved in a different way so
- // we prefer to keep claims but don't store duplicate updates for a given
- // (payment_hash, HTLCSource) pair.
- let mut existing_claim = false;
- e.get_mut().retain(|htlc_data| {
- if htlc.0 == htlc_data.0 {
- if htlc_data.1.is_some() {
- existing_claim = true;
- true
- } else { false }
- } else { true }
- });
- if !existing_claim {
- e.get_mut().push((htlc.0, htlc.1));
- }
- }
- hash_map::Entry::Vacant(e) => {
- e.insert(vec![(htlc.0, htlc.1)]);
- }
- }
}
}
let mut pending_events = self.pending_events.lock().unwrap();
chain_monitor,
broadcaster,
pending_events: Mutex::new(Vec::new()),
- pending_htlc_updated: Mutex::new(HashMap::new()),
logger,
fee_estimator: feeest,
};
}
}
- fn fetch_pending_htlc_updated(&self) -> Vec<HTLCUpdate> {
- let mut updated = self.pending_htlc_updated.lock().unwrap();
- let mut pending_htlcs_updated = Vec::with_capacity(updated.len());
- for (k, v) in updated.drain() {
- for htlc_data in v {
- pending_htlcs_updated.push(HTLCUpdate {
- payment_hash: k,
- payment_preimage: htlc_data.1,
- source: htlc_data.0,
- });
- }
+ fn get_and_clear_pending_htlcs_updated(&self) -> Vec<HTLCUpdate> {
+ let mut pending_htlcs_updated = Vec::new();
+ for chan in self.monitors.lock().unwrap().values_mut() {
+ pending_htlcs_updated.append(&mut chan.get_and_clear_pending_htlcs_updated());
}
pending_htlcs_updated
}
payment_preimages: HashMap<PaymentHash, PaymentPreimage>,
+ pending_htlcs_updated: Vec<HTLCUpdate>,
+
destination_script: Script,
// Thanks to data loss protection, we may be able to claim our non-htlc funds
// back, this is the script we have to spend from but we need to
self.current_remote_commitment_number != other.current_remote_commitment_number ||
self.current_local_signed_commitment_tx != other.current_local_signed_commitment_tx ||
self.payment_preimages != other.payment_preimages ||
+ self.pending_htlcs_updated != other.pending_htlcs_updated ||
self.destination_script != other.destination_script ||
self.to_remote_rescue != other.to_remote_rescue ||
self.pending_claim_requests != other.pending_claim_requests ||
writer.write_all(&payment_preimage.0[..])?;
}
+ writer.write_all(&byte_utils::be64_to_array(self.pending_htlcs_updated.len() as u64))?;
+ for data in self.pending_htlcs_updated.iter() {
+ data.write(writer)?;
+ }
+
self.last_block_hash.write(writer)?;
self.destination_script.write(writer)?;
if let Some((ref to_remote_script, ref local_key)) = self.to_remote_rescue {
current_remote_commitment_number: 1 << 48,
payment_preimages: HashMap::new(),
+ pending_htlcs_updated: Vec::new(),
+
destination_script: destination_script,
to_remote_rescue: None,
res
}
+ /// Get the list of HTLCs who's status has been updated on chain. This should be called by
+ /// ChannelManager via ManyChannelMonitor::get_and_clear_pending_htlcs_updated().
+ pub fn get_and_clear_pending_htlcs_updated(&mut self) -> Vec<HTLCUpdate> {
+ let mut ret = Vec::new();
+ mem::swap(&mut ret, &mut self.pending_htlcs_updated);
+ ret
+ }
+
/// Can only fail if idx is < get_min_seen_secret
pub(super) fn get_secret(&self, idx: u64) -> Option<[u8; 32]> {
for i in 0..self.old_secrets.len() {
/// Eventually this should be pub and, roughly, implement ChainListener, however this requires
/// &mut self, as well as returns new spendable outputs and outpoints to watch for spending of
/// on-chain.
- fn block_connected(&mut self, txn_matched: &[&Transaction], height: u32, block_hash: &Sha256dHash, broadcaster: &BroadcasterInterface, fee_estimator: &FeeEstimator)-> (Vec<(Sha256dHash, Vec<TxOut>)>, Vec<SpendableOutputDescriptor>, Vec<(HTLCSource, Option<PaymentPreimage>, PaymentHash)>) {
+ fn block_connected(&mut self, txn_matched: &[&Transaction], height: u32, block_hash: &Sha256dHash, broadcaster: &BroadcasterInterface, fee_estimator: &FeeEstimator)-> (Vec<(Sha256dHash, Vec<TxOut>)>, Vec<SpendableOutputDescriptor>) {
for tx in txn_matched {
let mut output_val = 0;
for out in tx.output.iter() {
log_trace!(self, "Block {} at height {} connected with {} txn matched", block_hash, height, txn_matched.len());
let mut watch_outputs = Vec::new();
let mut spendable_outputs = Vec::new();
- let mut htlc_updated = Vec::new();
let mut bump_candidates = HashSet::new();
for tx in txn_matched {
if tx.input.len() == 1 {
// While all commitment/HTLC-Success/HTLC-Timeout transactions have one input, HTLCs
// can also be resolved in a few other ways which can have more than one output. Thus,
// we call is_resolving_htlc_output here outside of the tx.input.len() == 1 check.
- let mut updated = self.is_resolving_htlc_output(&tx, height);
- if updated.len() > 0 {
- htlc_updated.append(&mut updated);
- }
+ self.is_resolving_htlc_output(&tx, height);
// Scan all input to verify is one of the outpoint spent is of interest for us
let mut claimed_outputs_material = Vec::new();
},
OnchainEvent::HTLCUpdate { htlc_update } => {
log_trace!(self, "HTLC {} failure update has got enough confirmations to be passed upstream", log_bytes!((htlc_update.1).0));
- htlc_updated.push((htlc_update.0, None, htlc_update.1));
+ self.pending_htlcs_updated.push(HTLCUpdate {
+ payment_hash: htlc_update.1,
+ payment_preimage: None,
+ source: htlc_update.0,
+ });
},
OnchainEvent::ContentiousOutpoint { outpoint, .. } => {
self.claimable_outpoints.remove(&outpoint);
for &(ref txid, ref output_scripts) in watch_outputs.iter() {
self.outputs_to_watch.insert(txid.clone(), output_scripts.iter().map(|o| o.script_pubkey.clone()).collect());
}
- (watch_outputs, spendable_outputs, htlc_updated)
+ (watch_outputs, spendable_outputs)
}
fn block_disconnected(&mut self, height: u32, block_hash: &Sha256dHash, broadcaster: &BroadcasterInterface, fee_estimator: &FeeEstimator) {
/// Check if any transaction broadcasted is resolving HTLC output by a success or timeout on a local
/// or remote commitment tx, if so send back the source, preimage if found and payment_hash of resolved HTLC
- fn is_resolving_htlc_output(&mut self, tx: &Transaction, height: u32) -> Vec<(HTLCSource, Option<PaymentPreimage>, PaymentHash)> {
- let mut htlc_updated = Vec::new();
-
+ fn is_resolving_htlc_output(&mut self, tx: &Transaction, height: u32) {
'outer_loop: for input in &tx.input {
let mut payment_data = None;
let revocation_sig_claim = (input.witness.len() == 3 && HTLCType::scriptlen_to_htlctype(input.witness[2].len()) == Some(HTLCType::OfferedHTLC) && input.witness[1].len() == 33)
let mut payment_preimage = PaymentPreimage([0; 32]);
if accepted_preimage_claim {
payment_preimage.0.copy_from_slice(&input.witness[3]);
- htlc_updated.push((source, Some(payment_preimage), payment_hash));
+ self.pending_htlcs_updated.push(HTLCUpdate {
+ source,
+ payment_preimage: Some(payment_preimage),
+ payment_hash
+ });
} else if offered_preimage_claim {
payment_preimage.0.copy_from_slice(&input.witness[1]);
- htlc_updated.push((source, Some(payment_preimage), payment_hash));
+ self.pending_htlcs_updated.push(HTLCUpdate {
+ source,
+ payment_preimage: Some(payment_preimage),
+ payment_hash
+ });
} else {
log_info!(self, "Failing HTLC with payment_hash {} timeout by a spend tx, waiting for confirmation (at height{})", log_bytes!(payment_hash.0), height + ANTI_REORG_DELAY - 1);
match self.onchain_events_waiting_threshold_conf.entry(height + ANTI_REORG_DELAY - 1) {
}
}
}
- htlc_updated
}
/// Lightning security model (i.e being able to redeem/timeout HTLC or penalize coutnerparty onchain) lays on the assumption of claim transactions getting confirmed before timelock expiration
}
}
+ let pending_htlcs_updated_len: u64 = Readable::read(reader)?;
+ let mut pending_htlcs_updated = Vec::with_capacity(cmp::min(pending_htlcs_updated_len as usize, MAX_ALLOC_SIZE / (32 + 8*3)));
+ for _ in 0..pending_htlcs_updated_len {
+ pending_htlcs_updated.push(Readable::read(reader)?);
+ }
+
let last_block_hash: Sha256dHash = Readable::read(reader)?;
let destination_script = Readable::read(reader)?;
let to_remote_rescue = match <u8 as Readable<R>>::read(reader)? {
current_remote_commitment_number,
payment_preimages,
+ pending_htlcs_updated,
destination_script,
to_remote_rescue,
projects / rust-lightning / commitdiff