pub extern "C" fn BestBlock_clone(orig: &BestBlock) -> BestBlock {
orig.clone()
}
+/// Checks if two BestBlocks contain equal inner contents.
+/// This ignores pointers and is_owned flags and looks at the values in fields.
+/// Two objects with NULL inner values will be considered "equal" here.
+#[no_mangle]
+pub extern "C" fn BestBlock_eq(a: &BestBlock, b: &BestBlock) -> bool {
+ if a.inner == b.inner { return true; }
+ if a.inner.is_null() || b.inner.is_null() { return false; }
+ if a.get_native_ref() == b.get_native_ref() { true } else { false }
+}
/// Constructs a `BestBlock` that represents the genesis block at height 0 of the given
/// network.
#[must_use]
}
}
}
-/// An error enum representing a failure to persist a channel monitor update.
+/// An enum representing the status of a channel monitor update persistence.
#[derive(Clone)]
#[must_use]
#[repr(C)]
-pub enum ChannelMonitorUpdateErr {
+pub enum ChannelMonitorUpdateStatus {
+ /// The update has been durably persisted and all copies of the relevant [`ChannelMonitor`]
+ /// have been updated.
+ ///
+ /// This includes performing any `fsync()` calls required to ensure the update is guaranteed to
+ /// be available on restart even if the application crashes.
+ Completed,
/// Used to indicate a temporary failure (eg connection to a watchtower or remote backup of
/// our state failed, but is expected to succeed at some point in the future).
///
/// Such a failure will \"freeze\" a channel, preventing us from revoking old states or
- /// submitting new commitment transactions to the counterparty. Once the update(s) that failed
- /// have been successfully applied, a [`MonitorEvent::UpdateCompleted`] event should be returned
- /// via [`Watch::release_pending_monitor_events`] which will then restore the channel to an
- /// operational state.
- ///
- /// Note that a given ChannelManager will *never* re-generate a given ChannelMonitorUpdate. If
- /// you return a TemporaryFailure you must ensure that it is written to disk safely before
- /// writing out the latest ChannelManager state.
- ///
- /// Even when a channel has been \"frozen\" updates to the ChannelMonitor can continue to occur
- /// (eg if an inbound HTLC which we forwarded was claimed upstream resulting in us attempting
- /// to claim it on this channel) and those updates must be applied wherever they can be. At
- /// least one such updated ChannelMonitor must be persisted otherwise PermanentFailure should
- /// be returned to get things on-chain ASAP using only the in-memory copy. Obviously updates to
- /// the channel which would invalidate previous ChannelMonitors are not made when a channel has
- /// been \"frozen\".
- ///
- /// Note that even if updates made after TemporaryFailure succeed you must still provide a
- /// [`MonitorEvent::UpdateCompleted`] to ensure you have the latest monitor and re-enable
- /// normal channel operation. Note that this is normally generated through a call to
- /// [`ChainMonitor::channel_monitor_updated`].
- ///
- /// Note that the update being processed here will not be replayed for you when you return a
- /// [`MonitorEvent::UpdateCompleted`] event via [`Watch::release_pending_monitor_events`], so
- /// you must store the update itself on your own local disk prior to returning a
- /// TemporaryFailure. You may, of course, employ a journaling approach, storing only the
- /// ChannelMonitorUpdate on disk without updating the monitor itself, replaying the journal at
- /// reload-time.
+ /// submitting new commitment transactions to the counterparty. Once the update(s) which failed
+ /// have been successfully applied, a [`MonitorEvent::Completed`] can be used to restore the
+ /// channel to an operational state.
+ ///
+ /// Note that a given [`ChannelManager`] will *never* re-generate a [`ChannelMonitorUpdate`].
+ /// If you return this error you must ensure that it is written to disk safely before writing
+ /// the latest [`ChannelManager`] state, or you should return [`PermanentFailure`] instead.
+ ///
+ /// Even when a channel has been \"frozen\", updates to the [`ChannelMonitor`] can continue to
+ /// occur (e.g. if an inbound HTLC which we forwarded was claimed upstream, resulting in us
+ /// attempting to claim it on this channel) and those updates must still be persisted.
+ ///
+ /// No updates to the channel will be made which could invalidate other [`ChannelMonitor`]s
+ /// until a [`MonitorEvent::Completed`] is provided, even if you return no error on a later
+ /// monitor update for the same channel.
///
/// For deployments where a copy of ChannelMonitors and other local state are backed up in a
/// remote location (with local copies persisted immediately), it is anticipated that all
- /// updates will return TemporaryFailure until the remote copies could be updated.
+ /// updates will return [`InProgress`] until the remote copies could be updated.
+ ///
+ /// [`PermanentFailure`]: ChannelMonitorUpdateStatus::PermanentFailure
+ /// [`InProgress`]: ChannelMonitorUpdateStatus::InProgress
+ /// [`ChannelManager`]: crate::ln::channelmanager::ChannelManager
+ InProgress,
+ /// Used to indicate no further channel monitor updates will be allowed (likely a disk failure
+ /// or a remote copy of this [`ChannelMonitor`] is no longer reachable and thus not updatable).
///
- /// [`ChainMonitor::channel_monitor_updated`]: chainmonitor::ChainMonitor::channel_monitor_updated
- TemporaryFailure,
- /// Used to indicate no further channel monitor updates will be allowed (eg we've moved on to a
- /// different watchtower and cannot update with all watchtowers that were previously informed
- /// of this channel).
+ /// When this is returned, [`ChannelManager`] will force-close the channel but *not* broadcast
+ /// our current commitment transaction. This avoids a dangerous case where a local disk failure
+ /// (e.g. the Linux-default remounting of the disk as read-only) causes [`PermanentFailure`]s
+ /// for all monitor updates. If we were to broadcast our latest commitment transaction and then
+ /// restart, we could end up reading a previous [`ChannelMonitor`] and [`ChannelManager`],
+ /// revoking our now-broadcasted state before seeing it confirm and losing all our funds.
///
- /// At reception of this error, ChannelManager will force-close the channel and return at
- /// least a final ChannelMonitorUpdate::ChannelForceClosed which must be delivered to at
- /// least one ChannelMonitor copy. Revocation secret MUST NOT be released and offchain channel
- /// update must be rejected.
+ /// Note that this is somewhat of a tradeoff - if the disk is really gone and we may have lost
+ /// the data permanently, we really should broadcast immediately. If the data can be recovered
+ /// with manual intervention, we'd rather close the channel, rejecting future updates to it,
+ /// and broadcast the latest state only if we have HTLCs to claim which are timing out (which
+ /// we do as long as blocks are connected).
///
- /// This failure may also signal a failure to update the local persisted copy of one of
- /// the channel monitor instance.
+ /// In order to broadcast the latest local commitment transaction, you'll need to call
+ /// [`ChannelMonitor::get_latest_holder_commitment_txn`] and broadcast the resulting
+ /// transactions once you've safely ensured no further channel updates can be generated by your
+ /// [`ChannelManager`].
///
- /// Note that even when you fail a holder commitment transaction update, you must store the
- /// update to ensure you can claim from it in case of a duplicate copy of this ChannelMonitor
- /// broadcasts it (e.g distributed channel-monitor deployment)
+ /// Note that at least one final [`ChannelMonitorUpdate`] may still be provided, which must
+ /// still be processed by a running [`ChannelMonitor`]. This final update will mark the
+ /// [`ChannelMonitor`] as finalized, ensuring no further updates (e.g. revocation of the latest
+ /// commitment transaction) are allowed.
+ ///
+ /// Note that even if you return a [`PermanentFailure`] due to unavailability of secondary
+ /// [`ChannelMonitor`] copies, you should still make an attempt to store the update where
+ /// possible to ensure you can claim HTLC outputs on the latest commitment transaction
+ /// broadcasted later.
///
/// In case of distributed watchtowers deployment, the new version must be written to disk, as
/// state may have been stored but rejected due to a block forcing a commitment broadcast. This
/// storage is used to claim outputs of rejected state confirmed onchain by another watchtower,
/// lagging behind on block processing.
+ ///
+ /// [`PermanentFailure`]: ChannelMonitorUpdateStatus::PermanentFailure
+ /// [`ChannelManager`]: crate::ln::channelmanager::ChannelManager
PermanentFailure,
}
-use lightning::chain::ChannelMonitorUpdateErr as ChannelMonitorUpdateErrImport;
-pub(crate) type nativeChannelMonitorUpdateErr = ChannelMonitorUpdateErrImport;
+use lightning::chain::ChannelMonitorUpdateStatus as ChannelMonitorUpdateStatusImport;
+pub(crate) type nativeChannelMonitorUpdateStatus = ChannelMonitorUpdateStatusImport;
-impl ChannelMonitorUpdateErr {
+impl ChannelMonitorUpdateStatus {
#[allow(unused)]
- pub(crate) fn to_native(&self) -> nativeChannelMonitorUpdateErr {
+ pub(crate) fn to_native(&self) -> nativeChannelMonitorUpdateStatus {
match self {
- ChannelMonitorUpdateErr::TemporaryFailure => nativeChannelMonitorUpdateErr::TemporaryFailure,
- ChannelMonitorUpdateErr::PermanentFailure => nativeChannelMonitorUpdateErr::PermanentFailure,
+ ChannelMonitorUpdateStatus::Completed => nativeChannelMonitorUpdateStatus::Completed,
+ ChannelMonitorUpdateStatus::InProgress => nativeChannelMonitorUpdateStatus::InProgress,
+ ChannelMonitorUpdateStatus::PermanentFailure => nativeChannelMonitorUpdateStatus::PermanentFailure,
}
}
#[allow(unused)]
- pub(crate) fn into_native(self) -> nativeChannelMonitorUpdateErr {
+ pub(crate) fn into_native(self) -> nativeChannelMonitorUpdateStatus {
match self {
- ChannelMonitorUpdateErr::TemporaryFailure => nativeChannelMonitorUpdateErr::TemporaryFailure,
- ChannelMonitorUpdateErr::PermanentFailure => nativeChannelMonitorUpdateErr::PermanentFailure,
+ ChannelMonitorUpdateStatus::Completed => nativeChannelMonitorUpdateStatus::Completed,
+ ChannelMonitorUpdateStatus::InProgress => nativeChannelMonitorUpdateStatus::InProgress,
+ ChannelMonitorUpdateStatus::PermanentFailure => nativeChannelMonitorUpdateStatus::PermanentFailure,
}
}
#[allow(unused)]
- pub(crate) fn from_native(native: &nativeChannelMonitorUpdateErr) -> Self {
+ pub(crate) fn from_native(native: &nativeChannelMonitorUpdateStatus) -> Self {
match native {
- nativeChannelMonitorUpdateErr::TemporaryFailure => ChannelMonitorUpdateErr::TemporaryFailure,
- nativeChannelMonitorUpdateErr::PermanentFailure => ChannelMonitorUpdateErr::PermanentFailure,
+ nativeChannelMonitorUpdateStatus::Completed => ChannelMonitorUpdateStatus::Completed,
+ nativeChannelMonitorUpdateStatus::InProgress => ChannelMonitorUpdateStatus::InProgress,
+ nativeChannelMonitorUpdateStatus::PermanentFailure => ChannelMonitorUpdateStatus::PermanentFailure,
}
}
#[allow(unused)]
- pub(crate) fn native_into(native: nativeChannelMonitorUpdateErr) -> Self {
+ pub(crate) fn native_into(native: nativeChannelMonitorUpdateStatus) -> Self {
match native {
- nativeChannelMonitorUpdateErr::TemporaryFailure => ChannelMonitorUpdateErr::TemporaryFailure,
- nativeChannelMonitorUpdateErr::PermanentFailure => ChannelMonitorUpdateErr::PermanentFailure,
+ nativeChannelMonitorUpdateStatus::Completed => ChannelMonitorUpdateStatus::Completed,
+ nativeChannelMonitorUpdateStatus::InProgress => ChannelMonitorUpdateStatus::InProgress,
+ nativeChannelMonitorUpdateStatus::PermanentFailure => ChannelMonitorUpdateStatus::PermanentFailure,
}
}
}
-/// Creates a copy of the ChannelMonitorUpdateErr
+/// Creates a copy of the ChannelMonitorUpdateStatus
#[no_mangle]
-pub extern "C" fn ChannelMonitorUpdateErr_clone(orig: &ChannelMonitorUpdateErr) -> ChannelMonitorUpdateErr {
+pub extern "C" fn ChannelMonitorUpdateStatus_clone(orig: &ChannelMonitorUpdateStatus) -> ChannelMonitorUpdateStatus {
orig.clone()
}
#[no_mangle]
-/// Utility method to constructs a new TemporaryFailure-variant ChannelMonitorUpdateErr
-pub extern "C" fn ChannelMonitorUpdateErr_temporary_failure() -> ChannelMonitorUpdateErr {
- ChannelMonitorUpdateErr::TemporaryFailure}
+/// Utility method to constructs a new Completed-variant ChannelMonitorUpdateStatus
+pub extern "C" fn ChannelMonitorUpdateStatus_completed() -> ChannelMonitorUpdateStatus {
+ ChannelMonitorUpdateStatus::Completed}
#[no_mangle]
-/// Utility method to constructs a new PermanentFailure-variant ChannelMonitorUpdateErr
-pub extern "C" fn ChannelMonitorUpdateErr_permanent_failure() -> ChannelMonitorUpdateErr {
- ChannelMonitorUpdateErr::PermanentFailure}
+/// Utility method to constructs a new InProgress-variant ChannelMonitorUpdateStatus
+pub extern "C" fn ChannelMonitorUpdateStatus_in_progress() -> ChannelMonitorUpdateStatus {
+ ChannelMonitorUpdateStatus::InProgress}
+#[no_mangle]
+/// Utility method to constructs a new PermanentFailure-variant ChannelMonitorUpdateStatus
+pub extern "C" fn ChannelMonitorUpdateStatus_permanent_failure() -> ChannelMonitorUpdateStatus {
+ ChannelMonitorUpdateStatus::PermanentFailure}
+/// Checks if two ChannelMonitorUpdateStatuss contain equal inner contents.
+/// This ignores pointers and is_owned flags and looks at the values in fields.
+#[no_mangle]
+pub extern "C" fn ChannelMonitorUpdateStatus_eq(a: &ChannelMonitorUpdateStatus, b: &ChannelMonitorUpdateStatus) -> bool {
+ if &a.to_native() == &b.to_native() { true } else { false }
+}
/// The `Watch` trait defines behavior for watching on-chain activity pertaining to channels as
/// blocks are connected and disconnected.
///
/// If an implementation maintains multiple instances of a channel's monitor (e.g., by storing
/// backup copies), then it must ensure that updates are applied across all instances. Otherwise, it
/// could result in a revoked transaction being broadcast, allowing the counterparty to claim all
-/// funds in the channel. See [`ChannelMonitorUpdateErr`] for more details about how to handle
+/// funds in the channel. See [`ChannelMonitorUpdateStatus`] for more details about how to handle
/// multiple instances.
///
-/// [`PermanentFailure`]: ChannelMonitorUpdateErr::PermanentFailure
+/// [`PermanentFailure`]: ChannelMonitorUpdateStatus::PermanentFailure
#[repr(C)]
pub struct Watch {
/// An opaque pointer which is passed to your function implementations as an argument.
/// with any spends of outputs returned by [`get_outputs_to_watch`]. In practice, this means
/// calling [`block_connected`] and [`block_disconnected`] on the monitor.
///
- /// Note: this interface MUST error with `ChannelMonitorUpdateErr::PermanentFailure` if
+ /// Note: this interface MUST error with [`ChannelMonitorUpdateStatus::PermanentFailure`] if
/// the given `funding_txo` has previously been registered via `watch_channel`.
///
/// [`get_outputs_to_watch`]: channelmonitor::ChannelMonitor::get_outputs_to_watch
/// [`block_connected`]: channelmonitor::ChannelMonitor::block_connected
/// [`block_disconnected`]: channelmonitor::ChannelMonitor::block_disconnected
#[must_use]
- pub watch_channel: extern "C" fn (this_arg: *const c_void, funding_txo: crate::lightning::chain::transaction::OutPoint, monitor: crate::lightning::chain::channelmonitor::ChannelMonitor) -> crate::c_types::derived::CResult_NoneChannelMonitorUpdateErrZ,
+ pub watch_channel: extern "C" fn (this_arg: *const c_void, funding_txo: crate::lightning::chain::transaction::OutPoint, monitor: crate::lightning::chain::channelmonitor::ChannelMonitor) -> crate::lightning::chain::ChannelMonitorUpdateStatus,
/// Updates a channel identified by `funding_txo` by applying `update` to its monitor.
///
/// Implementations must call [`update_monitor`] with the given update. See
- /// [`ChannelMonitorUpdateErr`] for invariants around returning an error.
+ /// [`ChannelMonitorUpdateStatus`] for invariants around returning an error.
///
/// [`update_monitor`]: channelmonitor::ChannelMonitor::update_monitor
#[must_use]
- pub update_channel: extern "C" fn (this_arg: *const c_void, funding_txo: crate::lightning::chain::transaction::OutPoint, update: crate::lightning::chain::channelmonitor::ChannelMonitorUpdate) -> crate::c_types::derived::CResult_NoneChannelMonitorUpdateErrZ,
+ pub update_channel: extern "C" fn (this_arg: *const c_void, funding_txo: crate::lightning::chain::transaction::OutPoint, update: crate::lightning::chain::channelmonitor::ChannelMonitorUpdate) -> crate::lightning::chain::ChannelMonitorUpdateStatus,
/// Returns any monitor events since the last call. Subsequent calls must only return new
/// events.
///
/// to disk.
///
/// For details on asynchronous [`ChannelMonitor`] updating and returning
- /// [`MonitorEvent::UpdateCompleted`] here, see [`ChannelMonitorUpdateErr::TemporaryFailure`].
+ /// [`MonitorEvent::Completed`] here, see [`ChannelMonitorUpdateStatus::InProgress`].
#[must_use]
pub release_pending_monitor_events: extern "C" fn (this_arg: *const c_void) -> crate::c_types::derived::CVec_C3Tuple_OutPointCVec_MonitorEventZPublicKeyZZ,
/// Frees any resources associated with this object given its this_arg pointer.
use lightning::chain::Watch as rustWatch;
impl rustWatch<crate::lightning::chain::keysinterface::Sign> for Watch {
- fn watch_channel(&self, mut funding_txo: lightning::chain::transaction::OutPoint, mut monitor: lightning::chain::channelmonitor::ChannelMonitor<crate::lightning::chain::keysinterface::Sign>) -> Result<(), lightning::chain::ChannelMonitorUpdateErr> {
+ fn watch_channel(&self, mut funding_txo: lightning::chain::transaction::OutPoint, mut monitor: lightning::chain::channelmonitor::ChannelMonitor<crate::lightning::chain::keysinterface::Sign>) -> lightning::chain::ChannelMonitorUpdateStatus {
let mut ret = (self.watch_channel)(self.this_arg, crate::lightning::chain::transaction::OutPoint { inner: ObjOps::heap_alloc(funding_txo), is_owned: true }, crate::lightning::chain::channelmonitor::ChannelMonitor { inner: ObjOps::heap_alloc(monitor), is_owned: true });
- let mut local_ret = match ret.result_ok { true => Ok( { () /*(*unsafe { Box::from_raw(<*mut _>::take_ptr(&mut ret.contents.result)) })*/ }), false => Err( { (*unsafe { Box::from_raw(<*mut _>::take_ptr(&mut ret.contents.err)) }).into_native() })};
- local_ret
+ ret.into_native()
}
- fn update_channel(&self, mut funding_txo: lightning::chain::transaction::OutPoint, mut update: lightning::chain::channelmonitor::ChannelMonitorUpdate) -> Result<(), lightning::chain::ChannelMonitorUpdateErr> {
+ fn update_channel(&self, mut funding_txo: lightning::chain::transaction::OutPoint, mut update: lightning::chain::channelmonitor::ChannelMonitorUpdate) -> lightning::chain::ChannelMonitorUpdateStatus {
let mut ret = (self.update_channel)(self.this_arg, crate::lightning::chain::transaction::OutPoint { inner: ObjOps::heap_alloc(funding_txo), is_owned: true }, crate::lightning::chain::channelmonitor::ChannelMonitorUpdate { inner: ObjOps::heap_alloc(update), is_owned: true });
- let mut local_ret = match ret.result_ok { true => Ok( { () /*(*unsafe { Box::from_raw(<*mut _>::take_ptr(&mut ret.contents.result)) })*/ }), false => Err( { (*unsafe { Box::from_raw(<*mut _>::take_ptr(&mut ret.contents.err)) }).into_native() })};
- local_ret
+ ret.into_native()
}
fn release_pending_monitor_events(&self) -> Vec<(lightning::chain::transaction::OutPoint, Vec<lightning::chain::channelmonitor::MonitorEvent>, Option<bitcoin::secp256k1::PublicKey>)> {
let mut ret = (self.release_pending_monitor_events)(self.this_arg);
/// Note that use as part of a [`Watch`] implementation involves reentrancy. Therefore, the `Filter`
/// should not block on I/O. Implementations should instead queue the newly monitored data to be
/// processed later. Then, in order to block until the data has been processed, any [`Watch`]
-/// invocation that has called the `Filter` must return [`TemporaryFailure`].
+/// invocation that has called the `Filter` must return [`InProgress`].
///
-/// [`TemporaryFailure`]: ChannelMonitorUpdateErr::TemporaryFailure
+/// [`InProgress`]: ChannelMonitorUpdateStatus::InProgress
/// [BIP 157]: https://github.com/bitcoin/bips/blob/master/bip-0157.mediawiki
/// [BIP 158]: https://github.com/bitcoin/bips/blob/master/bip-0158.mediawiki
#[repr(C)]
orig.clone()
}
/// Checks if two WatchedOutputs contain equal inner contents.
+/// This ignores pointers and is_owned flags and looks at the values in fields.
+/// Two objects with NULL inner values will be considered "equal" here.
+#[no_mangle]
+pub extern "C" fn WatchedOutput_eq(a: &WatchedOutput, b: &WatchedOutput) -> bool {
+ if a.inner == b.inner { return true; }
+ if a.inner.is_null() || b.inner.is_null() { return false; }
+ if a.get_native_ref() == b.get_native_ref() { true } else { false }
+}
+/// Checks if two WatchedOutputs contain equal inner contents.
#[no_mangle]
pub extern "C" fn WatchedOutput_hash(o: &WatchedOutput) -> u64 {
if o.inner.is_null() { return 0; }
projects / ldk-c-bindings / blobdiff