//! Structs and traits which allow other parts of rust-lightning to interact with the blockchain.
-use std::str::FromStr;
-use std::ffi::c_void;
+use alloc::str::FromStr;
+use core::ffi::c_void;
+use core::convert::Infallible;
use bitcoin::hashes::Hash;
use crate::c_types::*;
+#[cfg(feature="no-std")]
+use alloc::{vec::Vec, boxed::Box};
pub mod chaininterface;
pub mod chainmonitor;
pub mod keysinterface;
mod onchaintx {
-use std::str::FromStr;
-use std::ffi::c_void;
+use alloc::str::FromStr;
+use core::ffi::c_void;
+use core::convert::Infallible;
use bitcoin::hashes::Hash;
use crate::c_types::*;
+#[cfg(feature="no-std")]
+use alloc::{vec::Vec, boxed::Box};
}
mod package {
-use std::str::FromStr;
-use std::ffi::c_void;
+use alloc::str::FromStr;
+use core::ffi::c_void;
+use core::convert::Infallible;
use bitcoin::hashes::Hash;
use crate::c_types::*;
+#[cfg(feature="no-std")]
+use alloc::{vec::Vec, boxed::Box};
}
use lightning::chain::BestBlock as nativeBestBlockImport;
-type nativeBestBlock = nativeBestBlockImport;
+pub(crate) type nativeBestBlock = nativeBestBlockImport;
/// The best known block as identified by its hash and height.
#[must_use]
pub extern "C" fn BestBlock_free(this_obj: BestBlock) { }
#[allow(unused)]
/// Used only if an object of this type is returned as a trait impl by a method
-extern "C" fn BestBlock_free_void(this_ptr: *mut c_void) {
+pub(crate) extern "C" fn BestBlock_free_void(this_ptr: *mut c_void) {
unsafe { let _ = Box::from_raw(this_ptr as *mut nativeBestBlock); }
}
#[allow(unused)]
pub(crate) fn take_inner(mut self) -> *mut nativeBestBlock {
assert!(self.is_owned);
let ret = ObjOps::untweak_ptr(self.inner);
- self.inner = std::ptr::null_mut();
+ self.inner = core::ptr::null_mut();
ret
}
}
impl Clone for BestBlock {
fn clone(&self) -> Self {
Self {
- inner: if <*mut nativeBestBlock>::is_null(self.inner) { std::ptr::null_mut() } else {
+ inner: if <*mut nativeBestBlock>::is_null(self.inner) { core::ptr::null_mut() } else {
ObjOps::heap_alloc(unsafe { &*ObjOps::untweak_ptr(self.inner) }.clone()) },
is_owned: true,
}
// 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 Access {
+impl core::ops::Deref for Access {
type Target = Self;
fn deref(&self) -> &Self {
self
// 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 Listen {
+impl core::ops::Deref for Listen {
type Target = Self;
fn deref(&self) -> &Self {
self
// 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 Confirm {
+impl core::ops::Deref for Confirm {
type Target = Self;
fn deref(&self) -> &Self {
self
}
}
}
+/// An error enum representing a failure to persist a channel monitor update.
+#[must_use]
+#[derive(Clone)]
+#[repr(C)]
+pub enum ChannelMonitorUpdateErr {
+ /// 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.
+ ///
+ /// 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.
+ ///
+ /// [`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).
+ ///
+ /// 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.
+ ///
+ /// This failure may also signal a failure to update the local persisted copy of one of
+ /// the channel monitor instance.
+ ///
+ /// 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)
+ ///
+ /// 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,
+}
+use lightning::chain::ChannelMonitorUpdateErr as nativeChannelMonitorUpdateErr;
+impl ChannelMonitorUpdateErr {
+ #[allow(unused)]
+ pub(crate) fn to_native(&self) -> nativeChannelMonitorUpdateErr {
+ match self {
+ ChannelMonitorUpdateErr::TemporaryFailure => nativeChannelMonitorUpdateErr::TemporaryFailure,
+ ChannelMonitorUpdateErr::PermanentFailure => nativeChannelMonitorUpdateErr::PermanentFailure,
+ }
+ }
+ #[allow(unused)]
+ pub(crate) fn into_native(self) -> nativeChannelMonitorUpdateErr {
+ match self {
+ ChannelMonitorUpdateErr::TemporaryFailure => nativeChannelMonitorUpdateErr::TemporaryFailure,
+ ChannelMonitorUpdateErr::PermanentFailure => nativeChannelMonitorUpdateErr::PermanentFailure,
+ }
+ }
+ #[allow(unused)]
+ pub(crate) fn from_native(native: &nativeChannelMonitorUpdateErr) -> Self {
+ match native {
+ nativeChannelMonitorUpdateErr::TemporaryFailure => ChannelMonitorUpdateErr::TemporaryFailure,
+ nativeChannelMonitorUpdateErr::PermanentFailure => ChannelMonitorUpdateErr::PermanentFailure,
+ }
+ }
+ #[allow(unused)]
+ pub(crate) fn native_into(native: nativeChannelMonitorUpdateErr) -> Self {
+ match native {
+ nativeChannelMonitorUpdateErr::TemporaryFailure => ChannelMonitorUpdateErr::TemporaryFailure,
+ nativeChannelMonitorUpdateErr::PermanentFailure => ChannelMonitorUpdateErr::PermanentFailure,
+ }
+ }
+}
+/// Creates a copy of the ChannelMonitorUpdateErr
+#[no_mangle]
+pub extern "C" fn ChannelMonitorUpdateErr_clone(orig: &ChannelMonitorUpdateErr) -> ChannelMonitorUpdateErr {
+ orig.clone()
+}
+#[no_mangle]
+/// Utility method to constructs a new TemporaryFailure-variant ChannelMonitorUpdateErr
+pub extern "C" fn ChannelMonitorUpdateErr_temporary_failure() -> ChannelMonitorUpdateErr {
+ ChannelMonitorUpdateErr::TemporaryFailure}
+#[no_mangle]
+/// Utility method to constructs a new PermanentFailure-variant ChannelMonitorUpdateErr
+pub extern "C" fn ChannelMonitorUpdateErr_permanent_failure() -> ChannelMonitorUpdateErr {
+ ChannelMonitorUpdateErr::PermanentFailure}
/// The `Watch` trait defines behavior for watching on-chain activity pertaining to channels as
/// blocks are connected and disconnected.
///
/// funds in the channel. See [`ChannelMonitorUpdateErr`] for more details about how to handle
/// multiple instances.
///
-/// [`ChannelMonitor`]: channelmonitor::ChannelMonitor
-/// [`ChannelMonitorUpdateErr`]: channelmonitor::ChannelMonitorUpdateErr
-/// [`PermanentFailure`]: channelmonitor::ChannelMonitorUpdateErr::PermanentFailure
+/// [`PermanentFailure`]: ChannelMonitorUpdateErr::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
+ /// 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
/// [`ChannelMonitorUpdateErr`] for invariants around returning an error.
///
/// [`update_monitor`]: channelmonitor::ChannelMonitor::update_monitor
- /// [`ChannelMonitorUpdateErr`]: channelmonitor::ChannelMonitorUpdateErr
#[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,
/// Returns any monitor events since the last call. Subsequent calls must only return new
/// events.
+ ///
+ /// Note that after any block- or transaction-connection calls to a [`ChannelMonitor`], no
+ /// further events may be returned here until the [`ChannelMonitor`] has been fully persisted
+ /// to disk.
+ ///
+ /// For details on asynchronous [`ChannelMonitor`] updating and returning
+ /// [`MonitorEvent::UpdateCompleted`] here, see [`ChannelMonitorUpdateErr::TemporaryFailure`].
#[must_use]
pub release_pending_monitor_events: extern "C" fn (this_arg: *const c_void) -> crate::c_types::derived::CVec_MonitorEventZ,
/// 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::channelmonitor::ChannelMonitorUpdateErr> {
+ 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> {
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
}
- fn update_channel(&self, mut funding_txo: lightning::chain::transaction::OutPoint, mut update: lightning::chain::channelmonitor::ChannelMonitorUpdate) -> Result<(), lightning::chain::channelmonitor::ChannelMonitorUpdateErr> {
+ fn update_channel(&self, mut funding_txo: lightning::chain::transaction::OutPoint, mut update: lightning::chain::channelmonitor::ChannelMonitorUpdate) -> Result<(), lightning::chain::ChannelMonitorUpdateErr> {
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
// 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 Watch {
+impl core::ops::Deref for Watch {
type Target = Self;
fn deref(&self) -> &Self {
self
/// processed later. Then, in order to block until the data has been processed, any [`Watch`]
/// invocation that has called the `Filter` must return [`TemporaryFailure`].
///
-/// [`TemporaryFailure`]: channelmonitor::ChannelMonitorUpdateErr::TemporaryFailure
+/// [`TemporaryFailure`]: ChannelMonitorUpdateErr::TemporaryFailure
/// [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)]
// 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 Filter {
+impl core::ops::Deref for Filter {
type Target = Self;
fn deref(&self) -> &Self {
self
}
use lightning::chain::WatchedOutput as nativeWatchedOutputImport;
-type nativeWatchedOutput = nativeWatchedOutputImport;
+pub(crate) type nativeWatchedOutput = nativeWatchedOutputImport;
/// A transaction output watched by a [`ChannelMonitor`] for spends on-chain.
///
pub extern "C" fn WatchedOutput_free(this_obj: WatchedOutput) { }
#[allow(unused)]
/// Used only if an object of this type is returned as a trait impl by a method
-extern "C" fn WatchedOutput_free_void(this_ptr: *mut c_void) {
+pub(crate) extern "C" fn WatchedOutput_free_void(this_ptr: *mut c_void) {
unsafe { let _ = Box::from_raw(this_ptr as *mut nativeWatchedOutput); }
}
#[allow(unused)]
pub(crate) fn take_inner(mut self) -> *mut nativeWatchedOutput {
assert!(self.is_owned);
let ret = ObjOps::untweak_ptr(self.inner);
- self.inner = std::ptr::null_mut();
+ self.inner = core::ptr::null_mut();
ret
}
}
#[no_mangle]
pub extern "C" fn WatchedOutput_get_outpoint(this_ptr: &WatchedOutput) -> crate::lightning::chain::transaction::OutPoint {
let mut inner_val = &mut this_ptr.get_native_mut_ref().outpoint;
- crate::lightning::chain::transaction::OutPoint { inner: unsafe { ObjOps::nonnull_ptr_to_inner((inner_val as *const _) as *mut _) }, is_owned: false }
+ crate::lightning::chain::transaction::OutPoint { inner: unsafe { ObjOps::nonnull_ptr_to_inner((inner_val as *const lightning::chain::transaction::OutPoint<>) as *mut _) }, is_owned: false }
}
/// Outpoint identifying the transaction output.
#[no_mangle]
impl Clone for WatchedOutput {
fn clone(&self) -> Self {
Self {
- inner: if <*mut nativeWatchedOutput>::is_null(self.inner) { std::ptr::null_mut() } else {
+ inner: if <*mut nativeWatchedOutput>::is_null(self.inner) { core::ptr::null_mut() } else {
ObjOps::heap_alloc(unsafe { &*ObjOps::untweak_ptr(self.inner) }.clone()) },
is_owned: true,
}
#[no_mangle]
pub extern "C" fn WatchedOutput_hash(o: &WatchedOutput) -> u64 {
if o.inner.is_null() { return 0; }
- // Note that we'd love to use std::collections::hash_map::DefaultHasher but it's not in core
+ // Note that we'd love to use alloc::collections::hash_map::DefaultHasher but it's not in core
#[allow(deprecated)]
let mut hasher = core::hash::SipHasher::new();
- std::hash::Hash::hash(o.get_native_ref(), &mut hasher);
- std::hash::Hasher::finish(&hasher)
+ core::hash::Hash::hash(o.get_native_ref(), &mut hasher);
+ core::hash::Hasher::finish(&hasher)
}
projects / ldk-c-bindings / blobdiff