1 //! The logic to monitor for on-chain transactions and create the relevant claim responses lives
4 //! ChannelMonitor objects are generated by ChannelManager in response to relevant
5 //! messages/actions, and MUST be persisted to disk (and, preferably, remotely) before progress can
6 //! be made in responding to certain messages, see [`chain::Watch`] for more.
8 //! Note that ChannelMonitors are an important part of the lightning trust model and a copy of the
9 //! latest ChannelMonitor must always be actively monitoring for chain updates (and no out-of-date
10 //! ChannelMonitors should do so). Thus, if you're building rust-lightning into an HSM or other
11 //! security-domain-separated system design, you should consider having multiple paths for
12 //! ChannelMonitors to get out of the HSM and onto monitoring devices.
14 //! [`chain::Watch`]: ../trait.Watch.html
17 use bitcoin::hashes::Hash;
18 use crate::c_types::*;
21 use lightning::chain::channelmonitor::ChannelMonitorUpdate as nativeChannelMonitorUpdateImport;
22 type nativeChannelMonitorUpdate = nativeChannelMonitorUpdateImport;
24 /// An update generated by the underlying Channel itself which contains some new information the
25 /// ChannelMonitor should be made aware of.
28 pub struct ChannelMonitorUpdate {
29 /// Nearly everywhere, inner must be non-null, however in places where
30 /// the Rust equivalent takes an Option, it may be set to null to indicate None.
31 pub inner: *mut nativeChannelMonitorUpdate,
35 impl Drop for ChannelMonitorUpdate {
37 if self.is_owned && !self.inner.is_null() {
38 let _ = unsafe { Box::from_raw(self.inner) };
43 pub extern "C" fn ChannelMonitorUpdate_free(this_ptr: ChannelMonitorUpdate) { }
45 /// Used only if an object of this type is returned as a trait impl by a method
46 extern "C" fn ChannelMonitorUpdate_free_void(this_ptr: *mut c_void) {
47 unsafe { let _ = Box::from_raw(this_ptr as *mut nativeChannelMonitorUpdate); }
50 /// When moving out of the pointer, we have to ensure we aren't a reference, this makes that easy
51 impl ChannelMonitorUpdate {
52 pub(crate) fn take_ptr(mut self) -> *mut nativeChannelMonitorUpdate {
53 assert!(self.is_owned);
55 self.inner = std::ptr::null_mut();
59 impl Clone for ChannelMonitorUpdate {
60 fn clone(&self) -> Self {
62 inner: Box::into_raw(Box::new(unsafe { &*self.inner }.clone())),
68 /// Used only if an object of this type is returned as a trait impl by a method
69 pub(crate) extern "C" fn ChannelMonitorUpdate_clone_void(this_ptr: *const c_void) -> *mut c_void {
70 Box::into_raw(Box::new(unsafe { (*(this_ptr as *mut nativeChannelMonitorUpdate)).clone() })) as *mut c_void
73 pub extern "C" fn ChannelMonitorUpdate_clone(orig: &ChannelMonitorUpdate) -> ChannelMonitorUpdate {
74 ChannelMonitorUpdate { inner: Box::into_raw(Box::new(unsafe { &*orig.inner }.clone())), is_owned: true }
76 /// The sequence number of this update. Updates *must* be replayed in-order according to this
77 /// sequence number (and updates may panic if they are not). The update_id values are strictly
78 /// increasing and increase by one for each new update, with one exception specified below.
80 /// This sequence number is also used to track up to which points updates which returned
81 /// ChannelMonitorUpdateErr::TemporaryFailure have been applied to all copies of a given
82 /// ChannelMonitor when ChannelManager::channel_monitor_updated is called.
84 /// The only instance where update_id values are not strictly increasing is the case where we
85 /// allow post-force-close updates with a special update ID of [`CLOSED_CHANNEL_UPDATE_ID`]. See
86 /// its docs for more details.
88 /// [`CLOSED_CHANNEL_UPDATE_ID`]: constant.CLOSED_CHANNEL_UPDATE_ID.html
90 pub extern "C" fn ChannelMonitorUpdate_get_update_id(this_ptr: &ChannelMonitorUpdate) -> u64 {
91 let mut inner_val = &mut unsafe { &mut *this_ptr.inner }.update_id;
94 /// The sequence number of this update. Updates *must* be replayed in-order according to this
95 /// sequence number (and updates may panic if they are not). The update_id values are strictly
96 /// increasing and increase by one for each new update, with one exception specified below.
98 /// This sequence number is also used to track up to which points updates which returned
99 /// ChannelMonitorUpdateErr::TemporaryFailure have been applied to all copies of a given
100 /// ChannelMonitor when ChannelManager::channel_monitor_updated is called.
102 /// The only instance where update_id values are not strictly increasing is the case where we
103 /// allow post-force-close updates with a special update ID of [`CLOSED_CHANNEL_UPDATE_ID`]. See
104 /// its docs for more details.
106 /// [`CLOSED_CHANNEL_UPDATE_ID`]: constant.CLOSED_CHANNEL_UPDATE_ID.html
108 pub extern "C" fn ChannelMonitorUpdate_set_update_id(this_ptr: &mut ChannelMonitorUpdate, mut val: u64) {
109 unsafe { &mut *this_ptr.inner }.update_id = val;
113 pub static CLOSED_CHANNEL_UPDATE_ID: u64 = lightning::chain::channelmonitor::CLOSED_CHANNEL_UPDATE_ID;
115 pub extern "C" fn ChannelMonitorUpdate_write(obj: *const ChannelMonitorUpdate) -> crate::c_types::derived::CVec_u8Z {
116 crate::c_types::serialize_obj(unsafe { &(*(*obj).inner) })
119 pub extern "C" fn ChannelMonitorUpdate_read(ser: crate::c_types::u8slice) -> ChannelMonitorUpdate {
120 if let Ok(res) = crate::c_types::deserialize_obj(ser) {
121 ChannelMonitorUpdate { inner: Box::into_raw(Box::new(res)), is_owned: true }
123 ChannelMonitorUpdate { inner: std::ptr::null_mut(), is_owned: true }
126 /// An error enum representing a failure to persist a channel monitor update.
130 pub enum ChannelMonitorUpdateErr {
131 /// Used to indicate a temporary failure (eg connection to a watchtower or remote backup of
132 /// our state failed, but is expected to succeed at some point in the future).
134 /// Such a failure will \"freeze\" a channel, preventing us from revoking old states or
135 /// submitting new commitment transactions to the counterparty. Once the update(s) which failed
136 /// have been successfully applied, ChannelManager::channel_monitor_updated can be used to
137 /// restore the channel to an operational state.
139 /// Note that a given ChannelManager will *never* re-generate a given ChannelMonitorUpdate. If
140 /// you return a TemporaryFailure you must ensure that it is written to disk safely before
141 /// writing out the latest ChannelManager state.
143 /// Even when a channel has been \"frozen\" updates to the ChannelMonitor can continue to occur
144 /// (eg if an inbound HTLC which we forwarded was claimed upstream resulting in us attempting
145 /// to claim it on this channel) and those updates must be applied wherever they can be. At
146 /// least one such updated ChannelMonitor must be persisted otherwise PermanentFailure should
147 /// be returned to get things on-chain ASAP using only the in-memory copy. Obviously updates to
148 /// the channel which would invalidate previous ChannelMonitors are not made when a channel has
151 /// Note that even if updates made after TemporaryFailure succeed you must still call
152 /// channel_monitor_updated to ensure you have the latest monitor and re-enable normal channel
155 /// Note that the update being processed here will not be replayed for you when you call
156 /// ChannelManager::channel_monitor_updated, so you must store the update itself along
157 /// with the persisted ChannelMonitor on your own local disk prior to returning a
158 /// TemporaryFailure. You may, of course, employ a journaling approach, storing only the
159 /// ChannelMonitorUpdate on disk without updating the monitor itself, replaying the journal at
162 /// For deployments where a copy of ChannelMonitors and other local state are backed up in a
163 /// remote location (with local copies persisted immediately), it is anticipated that all
164 /// updates will return TemporaryFailure until the remote copies could be updated.
166 /// Used to indicate no further channel monitor updates will be allowed (eg we've moved on to a
167 /// different watchtower and cannot update with all watchtowers that were previously informed
168 /// of this channel).
170 /// At reception of this error, ChannelManager will force-close the channel and return at
171 /// least a final ChannelMonitorUpdate::ChannelForceClosed which must be delivered to at
172 /// least one ChannelMonitor copy. Revocation secret MUST NOT be released and offchain channel
173 /// update must be rejected.
175 /// This failure may also signal a failure to update the local persisted copy of one of
176 /// the channel monitor instance.
178 /// Note that even when you fail a holder commitment transaction update, you must store the
179 /// update to ensure you can claim from it in case of a duplicate copy of this ChannelMonitor
180 /// broadcasts it (e.g distributed channel-monitor deployment)
182 /// In case of distributed watchtowers deployment, the new version must be written to disk, as
183 /// state may have been stored but rejected due to a block forcing a commitment broadcast. This
184 /// storage is used to claim outputs of rejected state confirmed onchain by another watchtower,
185 /// lagging behind on block processing.
188 use lightning::chain::channelmonitor::ChannelMonitorUpdateErr as nativeChannelMonitorUpdateErr;
189 impl ChannelMonitorUpdateErr {
191 pub(crate) fn to_native(&self) -> nativeChannelMonitorUpdateErr {
193 ChannelMonitorUpdateErr::TemporaryFailure => nativeChannelMonitorUpdateErr::TemporaryFailure,
194 ChannelMonitorUpdateErr::PermanentFailure => nativeChannelMonitorUpdateErr::PermanentFailure,
198 pub(crate) fn into_native(self) -> nativeChannelMonitorUpdateErr {
200 ChannelMonitorUpdateErr::TemporaryFailure => nativeChannelMonitorUpdateErr::TemporaryFailure,
201 ChannelMonitorUpdateErr::PermanentFailure => nativeChannelMonitorUpdateErr::PermanentFailure,
205 pub(crate) fn from_native(native: &nativeChannelMonitorUpdateErr) -> Self {
207 nativeChannelMonitorUpdateErr::TemporaryFailure => ChannelMonitorUpdateErr::TemporaryFailure,
208 nativeChannelMonitorUpdateErr::PermanentFailure => ChannelMonitorUpdateErr::PermanentFailure,
212 pub(crate) fn native_into(native: nativeChannelMonitorUpdateErr) -> Self {
214 nativeChannelMonitorUpdateErr::TemporaryFailure => ChannelMonitorUpdateErr::TemporaryFailure,
215 nativeChannelMonitorUpdateErr::PermanentFailure => ChannelMonitorUpdateErr::PermanentFailure,
220 pub extern "C" fn ChannelMonitorUpdateErr_clone(orig: &ChannelMonitorUpdateErr) -> ChannelMonitorUpdateErr {
224 use lightning::chain::channelmonitor::MonitorUpdateError as nativeMonitorUpdateErrorImport;
225 type nativeMonitorUpdateError = nativeMonitorUpdateErrorImport;
227 /// General Err type for ChannelMonitor actions. Generally, this implies that the data provided is
228 /// inconsistent with the ChannelMonitor being called. eg for ChannelMonitor::update_monitor this
229 /// means you tried to update a monitor for a different channel or the ChannelMonitorUpdate was
231 /// Contains a developer-readable error message.
234 pub struct MonitorUpdateError {
235 /// Nearly everywhere, inner must be non-null, however in places where
236 /// the Rust equivalent takes an Option, it may be set to null to indicate None.
237 pub inner: *mut nativeMonitorUpdateError,
241 impl Drop for MonitorUpdateError {
243 if self.is_owned && !self.inner.is_null() {
244 let _ = unsafe { Box::from_raw(self.inner) };
249 pub extern "C" fn MonitorUpdateError_free(this_ptr: MonitorUpdateError) { }
251 /// Used only if an object of this type is returned as a trait impl by a method
252 extern "C" fn MonitorUpdateError_free_void(this_ptr: *mut c_void) {
253 unsafe { let _ = Box::from_raw(this_ptr as *mut nativeMonitorUpdateError); }
256 /// When moving out of the pointer, we have to ensure we aren't a reference, this makes that easy
257 impl MonitorUpdateError {
258 pub(crate) fn take_ptr(mut self) -> *mut nativeMonitorUpdateError {
259 assert!(self.is_owned);
260 let ret = self.inner;
261 self.inner = std::ptr::null_mut();
266 use lightning::chain::channelmonitor::MonitorEvent as nativeMonitorEventImport;
267 type nativeMonitorEvent = nativeMonitorEventImport;
269 /// An event to be processed by the ChannelManager.
272 pub struct MonitorEvent {
273 /// Nearly everywhere, inner must be non-null, however in places where
274 /// the Rust equivalent takes an Option, it may be set to null to indicate None.
275 pub inner: *mut nativeMonitorEvent,
279 impl Drop for MonitorEvent {
281 if self.is_owned && !self.inner.is_null() {
282 let _ = unsafe { Box::from_raw(self.inner) };
287 pub extern "C" fn MonitorEvent_free(this_ptr: MonitorEvent) { }
289 /// Used only if an object of this type is returned as a trait impl by a method
290 extern "C" fn MonitorEvent_free_void(this_ptr: *mut c_void) {
291 unsafe { let _ = Box::from_raw(this_ptr as *mut nativeMonitorEvent); }
294 /// When moving out of the pointer, we have to ensure we aren't a reference, this makes that easy
296 pub(crate) fn take_ptr(mut self) -> *mut nativeMonitorEvent {
297 assert!(self.is_owned);
298 let ret = self.inner;
299 self.inner = std::ptr::null_mut();
303 impl Clone for MonitorEvent {
304 fn clone(&self) -> Self {
306 inner: Box::into_raw(Box::new(unsafe { &*self.inner }.clone())),
312 /// Used only if an object of this type is returned as a trait impl by a method
313 pub(crate) extern "C" fn MonitorEvent_clone_void(this_ptr: *const c_void) -> *mut c_void {
314 Box::into_raw(Box::new(unsafe { (*(this_ptr as *mut nativeMonitorEvent)).clone() })) as *mut c_void
317 pub extern "C" fn MonitorEvent_clone(orig: &MonitorEvent) -> MonitorEvent {
318 MonitorEvent { inner: Box::into_raw(Box::new(unsafe { &*orig.inner }.clone())), is_owned: true }
321 use lightning::chain::channelmonitor::HTLCUpdate as nativeHTLCUpdateImport;
322 type nativeHTLCUpdate = nativeHTLCUpdateImport;
324 /// Simple structure sent back by `chain::Watch` when an HTLC from a forward channel is detected on
325 /// chain. Used to update the corresponding HTLC in the backward channel. Failing to pass the
326 /// preimage claim backward will lead to loss of funds.
328 /// [`chain::Watch`]: ../trait.Watch.html
331 pub struct HTLCUpdate {
332 /// Nearly everywhere, inner must be non-null, however in places where
333 /// the Rust equivalent takes an Option, it may be set to null to indicate None.
334 pub inner: *mut nativeHTLCUpdate,
338 impl Drop for HTLCUpdate {
340 if self.is_owned && !self.inner.is_null() {
341 let _ = unsafe { Box::from_raw(self.inner) };
346 pub extern "C" fn HTLCUpdate_free(this_ptr: HTLCUpdate) { }
348 /// Used only if an object of this type is returned as a trait impl by a method
349 extern "C" fn HTLCUpdate_free_void(this_ptr: *mut c_void) {
350 unsafe { let _ = Box::from_raw(this_ptr as *mut nativeHTLCUpdate); }
353 /// When moving out of the pointer, we have to ensure we aren't a reference, this makes that easy
355 pub(crate) fn take_ptr(mut self) -> *mut nativeHTLCUpdate {
356 assert!(self.is_owned);
357 let ret = self.inner;
358 self.inner = std::ptr::null_mut();
362 impl Clone for HTLCUpdate {
363 fn clone(&self) -> Self {
365 inner: Box::into_raw(Box::new(unsafe { &*self.inner }.clone())),
371 /// Used only if an object of this type is returned as a trait impl by a method
372 pub(crate) extern "C" fn HTLCUpdate_clone_void(this_ptr: *const c_void) -> *mut c_void {
373 Box::into_raw(Box::new(unsafe { (*(this_ptr as *mut nativeHTLCUpdate)).clone() })) as *mut c_void
376 pub extern "C" fn HTLCUpdate_clone(orig: &HTLCUpdate) -> HTLCUpdate {
377 HTLCUpdate { inner: Box::into_raw(Box::new(unsafe { &*orig.inner }.clone())), is_owned: true }
380 pub extern "C" fn HTLCUpdate_write(obj: *const HTLCUpdate) -> crate::c_types::derived::CVec_u8Z {
381 crate::c_types::serialize_obj(unsafe { &(*(*obj).inner) })
384 pub extern "C" fn HTLCUpdate_read(ser: crate::c_types::u8slice) -> HTLCUpdate {
385 if let Ok(res) = crate::c_types::deserialize_obj(ser) {
386 HTLCUpdate { inner: Box::into_raw(Box::new(res)), is_owned: true }
388 HTLCUpdate { inner: std::ptr::null_mut(), is_owned: true }
392 use lightning::chain::channelmonitor::ChannelMonitor as nativeChannelMonitorImport;
393 type nativeChannelMonitor = nativeChannelMonitorImport<crate::chain::keysinterface::ChannelKeys>;
395 /// A ChannelMonitor handles chain events (blocks connected and disconnected) and generates
396 /// on-chain transactions to ensure no loss of funds occurs.
398 /// You MUST ensure that no ChannelMonitors for a given channel anywhere contain out-of-date
399 /// information and are actively monitoring the chain.
401 /// Pending Events or updated HTLCs which have not yet been read out by
402 /// get_and_clear_pending_monitor_events or get_and_clear_pending_events are serialized to disk and
403 /// reloaded at deserialize-time. Thus, you must ensure that, when handling events, all events
404 /// gotten are fully handled before re-serializing the new state.
407 pub struct ChannelMonitor {
408 /// Nearly everywhere, inner must be non-null, however in places where
409 /// the Rust equivalent takes an Option, it may be set to null to indicate None.
410 pub inner: *mut nativeChannelMonitor,
414 impl Drop for ChannelMonitor {
416 if self.is_owned && !self.inner.is_null() {
417 let _ = unsafe { Box::from_raw(self.inner) };
422 pub extern "C" fn ChannelMonitor_free(this_ptr: ChannelMonitor) { }
424 /// Used only if an object of this type is returned as a trait impl by a method
425 extern "C" fn ChannelMonitor_free_void(this_ptr: *mut c_void) {
426 unsafe { let _ = Box::from_raw(this_ptr as *mut nativeChannelMonitor); }
429 /// When moving out of the pointer, we have to ensure we aren't a reference, this makes that easy
430 impl ChannelMonitor {
431 pub(crate) fn take_ptr(mut self) -> *mut nativeChannelMonitor {
432 assert!(self.is_owned);
433 let ret = self.inner;
434 self.inner = std::ptr::null_mut();
438 /// Updates a ChannelMonitor on the basis of some new information provided by the Channel
441 /// panics if the given update is not the next update by update_id.
444 pub extern "C" fn ChannelMonitor_update_monitor(this_arg: &mut ChannelMonitor, updates: &crate::chain::channelmonitor::ChannelMonitorUpdate, broadcaster: &crate::chain::chaininterface::BroadcasterInterface, fee_estimator: &crate::chain::chaininterface::FeeEstimator, logger: &crate::util::logger::Logger) -> crate::c_types::derived::CResult_NoneMonitorUpdateErrorZ {
445 let mut ret = unsafe { &mut (*(this_arg.inner as *mut nativeChannelMonitor)) }.update_monitor(unsafe { &*updates.inner }, broadcaster, fee_estimator, logger);
446 let mut local_ret = match ret { Ok(mut o) => crate::c_types::CResultTempl::ok( { 0u8 /*o*/ }), Err(mut e) => crate::c_types::CResultTempl::err( { crate::chain::channelmonitor::MonitorUpdateError { inner: Box::into_raw(Box::new(e)), is_owned: true } }) };
450 /// Gets the update_id from the latest ChannelMonitorUpdate which was applied to this
454 pub extern "C" fn ChannelMonitor_get_latest_update_id(this_arg: &ChannelMonitor) -> u64 {
455 let mut ret = unsafe { &*this_arg.inner }.get_latest_update_id();
459 /// Gets the funding transaction outpoint of the channel this ChannelMonitor is monitoring for.
462 pub extern "C" fn ChannelMonitor_get_funding_txo(this_arg: &ChannelMonitor) -> crate::c_types::derived::C2Tuple_OutPointScriptZ {
463 let mut ret = unsafe { &*this_arg.inner }.get_funding_txo();
464 let (ref orig_ret_0, ref orig_ret_1) = ret; let mut local_ret = (crate::chain::transaction::OutPoint { inner: unsafe { ( (&(*orig_ret_0) as *const _) as *mut _) }, is_owned: false }, orig_ret_1.clone().into_bytes().into()).into();
468 /// Get the list of HTLCs who's status has been updated on chain. This should be called by
469 /// ChannelManager via [`chain::Watch::release_pending_monitor_events`].
471 /// [`chain::Watch::release_pending_monitor_events`]: ../trait.Watch.html#tymethod.release_pending_monitor_events
474 pub extern "C" fn ChannelMonitor_get_and_clear_pending_monitor_events(this_arg: &mut ChannelMonitor) -> crate::c_types::derived::CVec_MonitorEventZ {
475 let mut ret = unsafe { &mut (*(this_arg.inner as *mut nativeChannelMonitor)) }.get_and_clear_pending_monitor_events();
476 let mut local_ret = Vec::new(); for item in ret.drain(..) { local_ret.push( { crate::chain::channelmonitor::MonitorEvent { inner: Box::into_raw(Box::new(item)), is_owned: true } }); };
480 /// Gets the list of pending events which were generated by previous actions, clearing the list
483 /// This is called by ChainMonitor::get_and_clear_pending_events() and is equivalent to
484 /// EventsProvider::get_and_clear_pending_events() except that it requires &mut self as we do
485 /// no internal locking in ChannelMonitors.
488 pub extern "C" fn ChannelMonitor_get_and_clear_pending_events(this_arg: &mut ChannelMonitor) -> crate::c_types::derived::CVec_EventZ {
489 let mut ret = unsafe { &mut (*(this_arg.inner as *mut nativeChannelMonitor)) }.get_and_clear_pending_events();
490 let mut local_ret = Vec::new(); for item in ret.drain(..) { local_ret.push( { crate::util::events::Event::native_into(item) }); };
494 /// Used by ChannelManager deserialization to broadcast the latest holder state if its copy of
495 /// the Channel was out-of-date. You may use it to get a broadcastable holder toxic tx in case of
496 /// fallen-behind, i.e when receiving a channel_reestablish with a proof that our counterparty side knows
497 /// a higher revocation secret than the holder commitment number we are aware of. Broadcasting these
498 /// transactions are UNSAFE, as they allow counterparty side to punish you. Nevertheless you may want to
499 /// broadcast them if counterparty don't close channel with his higher commitment transaction after a
500 /// substantial amount of time (a month or even a year) to get back funds. Best may be to contact
501 /// out-of-band the other node operator to coordinate with him if option is available to you.
502 /// In any-case, choice is up to the user.
505 pub extern "C" fn ChannelMonitor_get_latest_holder_commitment_txn(this_arg: &mut ChannelMonitor, logger: &crate::util::logger::Logger) -> crate::c_types::derived::CVec_TransactionZ {
506 let mut ret = unsafe { &mut (*(this_arg.inner as *mut nativeChannelMonitor)) }.get_latest_holder_commitment_txn(logger);
507 let mut local_ret = Vec::new(); for item in ret.drain(..) { local_ret.push( { let mut local_ret_0 = ::bitcoin::consensus::encode::serialize(&item); crate::c_types::Transaction::from_vec(local_ret_0) }); };
511 /// Processes transactions in a newly connected block, which may result in any of the following:
512 /// - update the monitor's state against resolved HTLCs
513 /// - punish the counterparty in the case of seeing a revoked commitment transaction
514 /// - force close the channel and claim/timeout incoming/outgoing HTLCs if near expiration
515 /// - detect settled outputs for later spending
516 /// - schedule and bump any in-flight claims
518 /// Returns any new outputs to watch from `txdata`; after called, these are also included in
519 /// [`get_outputs_to_watch`].
521 /// [`get_outputs_to_watch`]: #method.get_outputs_to_watch
524 pub extern "C" fn ChannelMonitor_block_connected(this_arg: &mut ChannelMonitor, header: *const [u8; 80], mut txdata: crate::c_types::derived::CVec_C2Tuple_usizeTransactionZZ, mut height: u32, mut broadcaster: crate::chain::chaininterface::BroadcasterInterface, mut fee_estimator: crate::chain::chaininterface::FeeEstimator, mut logger: crate::util::logger::Logger) -> crate::c_types::derived::CVec_C2Tuple_TxidCVec_C2Tuple_u32TxOutZZZZ {
525 let mut local_txdata = Vec::new(); for mut item in txdata.into_rust().drain(..) { local_txdata.push( { let (mut orig_txdata_0_0, mut orig_txdata_0_1) = item.to_rust(); let mut local_txdata_0 = (orig_txdata_0_0, orig_txdata_0_1.into_bitcoin()); local_txdata_0 }); };
526 let mut ret = unsafe { &mut (*(this_arg.inner as *mut nativeChannelMonitor)) }.block_connected(&::bitcoin::consensus::encode::deserialize(unsafe { &*header }).unwrap(), &local_txdata.iter().map(|(a, b)| (*a, b)).collect::<Vec<_>>()[..], height, broadcaster, fee_estimator, logger);
527 let mut local_ret = Vec::new(); for item in ret.drain(..) { local_ret.push( { let (mut orig_ret_0_0, mut orig_ret_0_1) = item; let mut local_orig_ret_0_1 = Vec::new(); for item in orig_ret_0_1.drain(..) { local_orig_ret_0_1.push( { let (mut orig_orig_ret_0_1_0_0, mut orig_orig_ret_0_1_0_1) = item; let mut local_orig_ret_0_1_0 = (orig_orig_ret_0_1_0_0, crate::c_types::TxOut::from_rust(orig_orig_ret_0_1_0_1)).into(); local_orig_ret_0_1_0 }); }; let mut local_ret_0 = (crate::c_types::ThirtyTwoBytes { data: orig_ret_0_0.into_inner() }, local_orig_ret_0_1.into()).into(); local_ret_0 }); };
531 /// Determines if the disconnected block contained any transactions of interest and updates
534 pub extern "C" fn ChannelMonitor_block_disconnected(this_arg: &mut ChannelMonitor, header: *const [u8; 80], mut height: u32, mut broadcaster: crate::chain::chaininterface::BroadcasterInterface, mut fee_estimator: crate::chain::chaininterface::FeeEstimator, mut logger: crate::util::logger::Logger) {
535 unsafe { &mut (*(this_arg.inner as *mut nativeChannelMonitor)) }.block_disconnected(&::bitcoin::consensus::encode::deserialize(unsafe { &*header }).unwrap(), height, broadcaster, fee_estimator, logger)
538 /// `Persist` defines behavior for persisting channel monitors: this could mean
539 /// writing once to disk, and/or uploading to one or more backup services.
541 /// Note that for every new monitor, you **must** persist the new `ChannelMonitor`
542 /// to disk/backups. And, on every update, you **must** persist either the
543 /// `ChannelMonitorUpdate` or the updated monitor itself. Otherwise, there is risk
544 /// of situations such as revoking a transaction, then crashing before this
545 /// revocation can be persisted, then unintentionally broadcasting a revoked
546 /// transaction and losing money. This is a risk because previous channel states
547 /// are toxic, so it's important that whatever channel state is persisted is
551 pub this_arg: *mut c_void,
552 /// Persist a new channel's data. The data can be stored any way you want, but
553 /// the identifier provided by Rust-Lightning is the channel's outpoint (and
554 /// it is up to you to maintain a correct mapping between the outpoint and the
555 /// stored channel data). Note that you **must** persist every new monitor to
556 /// disk. See the `Persist` trait documentation for more details.
558 /// See [`ChannelMonitor::serialize_for_disk`] for writing out a `ChannelMonitor`,
559 /// and [`ChannelMonitorUpdateErr`] for requirements when returning errors.
561 /// [`ChannelMonitor::serialize_for_disk`]: struct.ChannelMonitor.html#method.serialize_for_disk
562 /// [`ChannelMonitorUpdateErr`]: enum.ChannelMonitorUpdateErr.html
564 pub persist_new_channel: extern "C" fn (this_arg: *const c_void, id: crate::chain::transaction::OutPoint, data: &crate::chain::channelmonitor::ChannelMonitor) -> crate::c_types::derived::CResult_NoneChannelMonitorUpdateErrZ,
565 /// Update one channel's data. The provided `ChannelMonitor` has already
566 /// applied the given update.
568 /// Note that on every update, you **must** persist either the
569 /// `ChannelMonitorUpdate` or the updated monitor itself to disk/backups. See
570 /// the `Persist` trait documentation for more details.
572 /// If an implementer chooses to persist the updates only, they need to make
573 /// sure that all the updates are applied to the `ChannelMonitors` *before*
574 /// the set of channel monitors is given to the `ChannelManager`
575 /// deserialization routine. See [`ChannelMonitor::update_monitor`] for
576 /// applying a monitor update to a monitor. If full `ChannelMonitors` are
577 /// persisted, then there is no need to persist individual updates.
579 /// Note that there could be a performance tradeoff between persisting complete
580 /// channel monitors on every update vs. persisting only updates and applying
581 /// them in batches. The size of each monitor grows `O(number of state updates)`
582 /// whereas updates are small and `O(1)`.
584 /// See [`ChannelMonitor::serialize_for_disk`] for writing out a `ChannelMonitor`,
585 /// [`ChannelMonitorUpdate::write`] for writing out an update, and
586 /// [`ChannelMonitorUpdateErr`] for requirements when returning errors.
588 /// [`ChannelMonitor::update_monitor`]: struct.ChannelMonitor.html#impl-1
589 /// [`ChannelMonitor::serialize_for_disk`]: struct.ChannelMonitor.html#method.serialize_for_disk
590 /// [`ChannelMonitorUpdate::write`]: struct.ChannelMonitorUpdate.html#method.write
591 /// [`ChannelMonitorUpdateErr`]: enum.ChannelMonitorUpdateErr.html
593 pub update_persisted_channel: extern "C" fn (this_arg: *const c_void, id: crate::chain::transaction::OutPoint, update: &crate::chain::channelmonitor::ChannelMonitorUpdate, data: &crate::chain::channelmonitor::ChannelMonitor) -> crate::c_types::derived::CResult_NoneChannelMonitorUpdateErrZ,
594 pub free: Option<extern "C" fn(this_arg: *mut c_void)>,
596 unsafe impl Send for Persist {}
597 unsafe impl Sync for Persist {}
599 use lightning::chain::channelmonitor::Persist as rustPersist;
600 impl rustPersist<crate::chain::keysinterface::ChannelKeys> for Persist {
601 fn persist_new_channel(&self, id: lightning::chain::transaction::OutPoint, data: &lightning::chain::channelmonitor::ChannelMonitor<crate::chain::keysinterface::ChannelKeys>) -> Result<(), lightning::chain::channelmonitor::ChannelMonitorUpdateErr> {
602 let mut ret = (self.persist_new_channel)(self.this_arg, crate::chain::transaction::OutPoint { inner: Box::into_raw(Box::new(id)), is_owned: true }, &crate::chain::channelmonitor::ChannelMonitor { inner: unsafe { (data as *const _) as *mut _ }, is_owned: false });
603 let mut local_ret = match ret.result_ok { true => Ok( { () /*(*unsafe { Box::from_raw(ret.contents.result.take_ptr()) })*/ }), false => Err( { (*unsafe { Box::from_raw(ret.contents.err.take_ptr()) }).into_native() })};
606 fn update_persisted_channel(&self, id: lightning::chain::transaction::OutPoint, update: &lightning::chain::channelmonitor::ChannelMonitorUpdate, data: &lightning::chain::channelmonitor::ChannelMonitor<crate::chain::keysinterface::ChannelKeys>) -> Result<(), lightning::chain::channelmonitor::ChannelMonitorUpdateErr> {
607 let mut ret = (self.update_persisted_channel)(self.this_arg, crate::chain::transaction::OutPoint { inner: Box::into_raw(Box::new(id)), is_owned: true }, &crate::chain::channelmonitor::ChannelMonitorUpdate { inner: unsafe { (update as *const _) as *mut _ }, is_owned: false }, &crate::chain::channelmonitor::ChannelMonitor { inner: unsafe { (data as *const _) as *mut _ }, is_owned: false });
608 let mut local_ret = match ret.result_ok { true => Ok( { () /*(*unsafe { Box::from_raw(ret.contents.result.take_ptr()) })*/ }), false => Err( { (*unsafe { Box::from_raw(ret.contents.err.take_ptr()) }).into_native() })};
613 // We're essentially a pointer already, or at least a set of pointers, so allow us to be used
614 // directly as a Deref trait in higher-level structs:
615 impl std::ops::Deref for Persist {
617 fn deref(&self) -> &Self {
621 /// Calls the free function if one is set
623 pub extern "C" fn Persist_free(this_ptr: Persist) { }
624 impl Drop for Persist {
626 if let Some(f) = self.free {