+/// `Persist` defines behavior for persisting channel monitors: this could mean
+/// writing once to disk, and/or uploading to one or more backup services.
+///
+/// Note that for every new monitor, you **must** persist the new `ChannelMonitor`
+/// to disk/backups. And, on every update, you **must** persist either the
+/// `ChannelMonitorUpdate` or the updated monitor itself. Otherwise, there is risk
+/// of situations such as revoking a transaction, then crashing before this
+/// revocation can be persisted, then unintentionally broadcasting a revoked
+/// transaction and losing money. This is a risk because previous channel states
+/// are toxic, so it's important that whatever channel state is persisted is
+/// kept up-to-date.
+#[repr(C)]
+pub struct Persist {
+ /// An opaque pointer which is passed to your function implementations as an argument.
+ /// This has no meaning in the LDK, and can be NULL or any other value.
+ pub this_arg: *mut c_void,
+ /// Persist a new channel's data. The data can be stored any way you want, but
+ /// the identifier provided by Rust-Lightning is the channel's outpoint (and
+ /// it is up to you to maintain a correct mapping between the outpoint and the
+ /// stored channel data). Note that you **must** persist every new monitor to
+ /// disk. See the `Persist` trait documentation for more details.
+ ///
+ /// See [`Writeable::write`] on [`ChannelMonitor`] for writing out a `ChannelMonitor`
+ /// and [`ChannelMonitorUpdateErr`] for requirements when returning errors.
+ ///
+ /// [`Writeable::write`]: crate::util::ser::Writeable::write
+ #[must_use]
+ pub persist_new_channel: extern "C" fn (this_arg: *const c_void, id: crate::lightning::chain::transaction::OutPoint, data: &crate::lightning::chain::channelmonitor::ChannelMonitor) -> crate::c_types::derived::CResult_NoneChannelMonitorUpdateErrZ,
+ /// Update one channel's data. The provided `ChannelMonitor` has already
+ /// applied the given update.
+ ///
+ /// Note that on every update, you **must** persist either the
+ /// `ChannelMonitorUpdate` or the updated monitor itself to disk/backups. See
+ /// the `Persist` trait documentation for more details.
+ ///
+ /// If an implementer chooses to persist the updates only, they need to make
+ /// sure that all the updates are applied to the `ChannelMonitors` *before*
+ /// the set of channel monitors is given to the `ChannelManager`
+ /// deserialization routine. See [`ChannelMonitor::update_monitor`] for
+ /// applying a monitor update to a monitor. If full `ChannelMonitors` are
+ /// persisted, then there is no need to persist individual updates.
+ ///
+ /// Note that there could be a performance tradeoff between persisting complete
+ /// channel monitors on every update vs. persisting only updates and applying
+ /// them in batches. The size of each monitor grows `O(number of state updates)`
+ /// whereas updates are small and `O(1)`.
+ ///
+ /// See [`Writeable::write`] on [`ChannelMonitor`] for writing out a `ChannelMonitor`,
+ /// [`Writeable::write`] on [`ChannelMonitorUpdate`] for writing out an update, and
+ /// [`ChannelMonitorUpdateErr`] for requirements when returning errors.
+ ///
+ /// [`Writeable::write`]: crate::util::ser::Writeable::write
+ #[must_use]
+ pub update_persisted_channel: extern "C" fn (this_arg: *const c_void, id: crate::lightning::chain::transaction::OutPoint, update: &crate::lightning::chain::channelmonitor::ChannelMonitorUpdate, data: &crate::lightning::chain::channelmonitor::ChannelMonitor) -> crate::c_types::derived::CResult_NoneChannelMonitorUpdateErrZ,
+ /// Frees any resources associated with this object given its this_arg pointer.
+ /// Does not need to free the outer struct containing function pointers and may be NULL is no resources need to be freed.
+ pub free: Option<extern "C" fn(this_arg: *mut c_void)>,
+}
+unsafe impl Send for Persist {}
+unsafe impl Sync for Persist {}
+#[no_mangle]
+pub(crate) extern "C" fn Persist_clone_fields(orig: &Persist) -> Persist {
+ Persist {
+ this_arg: orig.this_arg,
+ persist_new_channel: Clone::clone(&orig.persist_new_channel),
+ update_persisted_channel: Clone::clone(&orig.update_persisted_channel),
+ free: Clone::clone(&orig.free),
+ }
+}
+
+use lightning::chain::chainmonitor::Persist as rustPersist;
+impl rustPersist<crate::lightning::chain::keysinterface::Sign> for Persist {
+ fn persist_new_channel(&self, mut id: lightning::chain::transaction::OutPoint, mut data: &lightning::chain::channelmonitor::ChannelMonitor<crate::lightning::chain::keysinterface::Sign>) -> Result<(), lightning::chain::ChannelMonitorUpdateErr> {
+ let mut ret = (self.persist_new_channel)(self.this_arg, crate::lightning::chain::transaction::OutPoint { inner: ObjOps::heap_alloc(id), is_owned: true }, &crate::lightning::chain::channelmonitor::ChannelMonitor { inner: unsafe { ObjOps::nonnull_ptr_to_inner((data as *const _) as *mut _) }, is_owned: false });
+ 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
+ }
+ fn update_persisted_channel(&self, mut id: lightning::chain::transaction::OutPoint, mut update: &lightning::chain::channelmonitor::ChannelMonitorUpdate, mut data: &lightning::chain::channelmonitor::ChannelMonitor<crate::lightning::chain::keysinterface::Sign>) -> Result<(), lightning::chain::ChannelMonitorUpdateErr> {
+ let mut ret = (self.update_persisted_channel)(self.this_arg, crate::lightning::chain::transaction::OutPoint { inner: ObjOps::heap_alloc(id), is_owned: true }, &crate::lightning::chain::channelmonitor::ChannelMonitorUpdate { inner: unsafe { ObjOps::nonnull_ptr_to_inner((update as *const _) as *mut _) }, is_owned: false }, &crate::lightning::chain::channelmonitor::ChannelMonitor { inner: unsafe { ObjOps::nonnull_ptr_to_inner((data as *const _) as *mut _) }, is_owned: false });
+ 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
+ }
+}
+
+// We're essentially a pointer already, or at least a set of pointers, so allow us to be used
+// directly as a Deref trait in higher-level structs:
+impl std::ops::Deref for Persist {
+ type Target = Self;
+ fn deref(&self) -> &Self {
+ self
+ }
+}
+/// Calls the free function if one is set
+#[no_mangle]
+pub extern "C" fn Persist_free(this_ptr: Persist) { }
+impl Drop for Persist {
+ fn drop(&mut self) {
+ if let Some(f) = self.free {
+ f(self.this_arg);
+ }
+ }
+}
+
+use lightning::chain::chainmonitor::LockedChannelMonitor as nativeLockedChannelMonitorImport;
+type nativeLockedChannelMonitor = nativeLockedChannelMonitorImport<'static, crate::lightning::chain::keysinterface::Sign>;
+
+/// A read-only reference to a current ChannelMonitor.
+///
+/// Note that this holds a mutex in [`ChainMonitor`] and may block other events until it is
+/// released.
+#[must_use]
+#[repr(C)]
+pub struct LockedChannelMonitor {
+ /// A pointer to the opaque Rust object.
+
+ /// Nearly everywhere, inner must be non-null, however in places where
+ /// the Rust equivalent takes an Option, it may be set to null to indicate None.
+ pub inner: *mut nativeLockedChannelMonitor,
+ /// Indicates that this is the only struct which contains the same pointer.
+
+ /// Rust functions which take ownership of an object provided via an argument require
+ /// this to be true and invalidate the object pointed to by inner.
+ pub is_owned: bool,
+}
+
+impl Drop for LockedChannelMonitor {
+ fn drop(&mut self) {
+ if self.is_owned && !<*mut nativeLockedChannelMonitor>::is_null(self.inner) {
+ let _ = unsafe { Box::from_raw(ObjOps::untweak_ptr(self.inner)) };
+ }
+ }
+}
+/// Frees any resources used by the LockedChannelMonitor, if is_owned is set and inner is non-NULL.
+#[no_mangle]
+pub extern "C" fn LockedChannelMonitor_free(this_obj: LockedChannelMonitor) { }
+#[allow(unused)]
+/// Used only if an object of this type is returned as a trait impl by a method
+extern "C" fn LockedChannelMonitor_free_void(this_ptr: *mut c_void) {
+ unsafe { let _ = Box::from_raw(this_ptr as *mut nativeLockedChannelMonitor); }
+}
+#[allow(unused)]
+impl LockedChannelMonitor {
+ pub(crate) fn get_native_ref(&self) -> &'static nativeLockedChannelMonitor {
+ unsafe { &*ObjOps::untweak_ptr(self.inner) }
+ }
+ pub(crate) fn get_native_mut_ref(&self) -> &'static mut nativeLockedChannelMonitor {
+ unsafe { &mut *ObjOps::untweak_ptr(self.inner) }
+ }
+ /// When moving out of the pointer, we have to ensure we aren't a reference, this makes that easy
+ pub(crate) fn take_inner(mut self) -> *mut nativeLockedChannelMonitor {
+ assert!(self.is_owned);
+ let ret = ObjOps::untweak_ptr(self.inner);
+ self.inner = std::ptr::null_mut();
+ ret
+ }
+}