//! Structs and traits which allow other parts of rust-lightning to interact with the blockchain.
use alloc::str::FromStr;
+use alloc::string::String;
use core::ffi::c_void;
use core::convert::Infallible;
use bitcoin::hashes::Hash;
pub mod chainmonitor;
pub mod channelmonitor;
pub mod transaction;
-pub mod keysinterface;
mod onchaintx {
use alloc::str::FromStr;
+use alloc::string::String;
use core::ffi::c_void;
use core::convert::Infallible;
use bitcoin::hashes::Hash;
mod package {
use alloc::str::FromStr;
+use alloc::string::String;
use core::ffi::c_void;
use core::convert::Infallible;
use bitcoin::hashes::Hash;
#[allow(unused)]
/// Used only if an object of this type is returned as a trait impl by a method
pub(crate) extern "C" fn BestBlock_free_void(this_ptr: *mut c_void) {
- unsafe { let _ = Box::from_raw(this_ptr as *mut nativeBestBlock); }
+ let _ = unsafe { Box::from_raw(this_ptr as *mut nativeBestBlock) };
}
#[allow(unused)]
impl BestBlock {
#[allow(unused)]
/// Used only if an object of this type is returned as a trait impl by a method
pub(crate) extern "C" fn BestBlock_clone_void(this_ptr: *const c_void) -> *mut c_void {
- Box::into_raw(Box::new(unsafe { (*(this_ptr as *mut nativeBestBlock)).clone() })) as *mut c_void
+ Box::into_raw(Box::new(unsafe { (*(this_ptr as *const nativeBestBlock)).clone() })) as *mut c_void
}
#[no_mangle]
/// Creates a copy of the BestBlock
/// network.
#[must_use]
#[no_mangle]
-pub extern "C" fn BestBlock_from_genesis(mut network: crate::bitcoin::network::Network) -> crate::lightning::chain::BestBlock {
- let mut ret = lightning::chain::BestBlock::from_genesis(network.into_bitcoin());
+pub extern "C" fn BestBlock_from_network(mut network: crate::bitcoin::network::Network) -> crate::lightning::chain::BestBlock {
+ let mut ret = lightning::chain::BestBlock::from_network(network.into_bitcoin());
crate::lightning::chain::BestBlock { inner: ObjOps::heap_alloc(ret), is_owned: true }
}
#[no_mangle]
pub extern "C" fn BestBlock_block_hash(this_arg: &crate::lightning::chain::BestBlock) -> crate::c_types::ThirtyTwoBytes {
let mut ret = unsafe { &*ObjOps::untweak_ptr(this_arg.inner) }.block_hash();
- crate::c_types::ThirtyTwoBytes { data: ret.into_inner() }
+ crate::c_types::ThirtyTwoBytes { data: *ret.as_ref() }
}
/// Returns the best block height.
ret
}
-/// An error when accessing the chain via [`Access`].
-#[derive(Clone)]
-#[must_use]
-#[repr(C)]
-pub enum AccessError {
- /// The requested chain is unknown.
- UnknownChain,
- /// The requested transaction doesn't exist or hasn't confirmed.
- UnknownTx,
-}
-use lightning::chain::AccessError as AccessErrorImport;
-pub(crate) type nativeAccessError = AccessErrorImport;
-
-impl AccessError {
- #[allow(unused)]
- pub(crate) fn to_native(&self) -> nativeAccessError {
- match self {
- AccessError::UnknownChain => nativeAccessError::UnknownChain,
- AccessError::UnknownTx => nativeAccessError::UnknownTx,
- }
- }
- #[allow(unused)]
- pub(crate) fn into_native(self) -> nativeAccessError {
- match self {
- AccessError::UnknownChain => nativeAccessError::UnknownChain,
- AccessError::UnknownTx => nativeAccessError::UnknownTx,
- }
- }
- #[allow(unused)]
- pub(crate) fn from_native(native: &nativeAccessError) -> Self {
- match native {
- nativeAccessError::UnknownChain => AccessError::UnknownChain,
- nativeAccessError::UnknownTx => AccessError::UnknownTx,
- }
- }
- #[allow(unused)]
- pub(crate) fn native_into(native: nativeAccessError) -> Self {
- match native {
- nativeAccessError::UnknownChain => AccessError::UnknownChain,
- nativeAccessError::UnknownTx => AccessError::UnknownTx,
- }
- }
-}
-/// Creates a copy of the AccessError
-#[no_mangle]
-pub extern "C" fn AccessError_clone(orig: &AccessError) -> AccessError {
- orig.clone()
-}
-#[no_mangle]
-/// Utility method to constructs a new UnknownChain-variant AccessError
-pub extern "C" fn AccessError_unknown_chain() -> AccessError {
- AccessError::UnknownChain}
-#[no_mangle]
-/// Utility method to constructs a new UnknownTx-variant AccessError
-pub extern "C" fn AccessError_unknown_tx() -> AccessError {
- AccessError::UnknownTx}
-/// The `Access` trait defines behavior for accessing chain data and state, such as blocks and
-/// UTXOs.
-#[repr(C)]
-pub struct Access {
- /// 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,
- /// Returns the transaction output of a funding transaction encoded by [`short_channel_id`].
- /// Returns an error if `genesis_hash` is for a different chain or if such a transaction output
- /// is unknown.
- ///
- /// [`short_channel_id`]: https://github.com/lightning/bolts/blob/master/07-routing-gossip.md#definition-of-short_channel_id
- #[must_use]
- pub get_utxo: extern "C" fn (this_arg: *const c_void, genesis_hash: *const [u8; 32], short_channel_id: u64) -> crate::c_types::derived::CResult_TxOutAccessErrorZ,
- /// 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 Access {}
-unsafe impl Sync for Access {}
-#[no_mangle]
-pub(crate) extern "C" fn Access_clone_fields(orig: &Access) -> Access {
- Access {
- this_arg: orig.this_arg,
- get_utxo: Clone::clone(&orig.get_utxo),
- free: Clone::clone(&orig.free),
- }
-}
-
-use lightning::chain::Access as rustAccess;
-impl rustAccess for Access {
- fn get_utxo(&self, mut genesis_hash: &bitcoin::hash_types::BlockHash, mut short_channel_id: u64) -> Result<bitcoin::blockdata::transaction::TxOut, lightning::chain::AccessError> {
- let mut ret = (self.get_utxo)(self.this_arg, genesis_hash.as_inner(), short_channel_id);
- let mut local_ret = match ret.result_ok { true => Ok( { (*unsafe { Box::from_raw(<*mut _>::take_ptr(&mut ret.contents.result)) }).into_rust() }), 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 core::ops::Deref for Access {
- type Target = Self;
- fn deref(&self) -> &Self {
- self
- }
-}
-/// Calls the free function if one is set
-#[no_mangle]
-pub extern "C" fn Access_free(this_ptr: Access) { }
-impl Drop for Access {
- fn drop(&mut self) {
- if let Some(f) = self.free {
- f(self.this_arg);
- }
- }
-}
/// The `Listen` trait is used to notify when blocks have been connected or disconnected from the
/// chain.
///
}
unsafe impl Send for Listen {}
unsafe impl Sync for Listen {}
-#[no_mangle]
-pub(crate) extern "C" fn Listen_clone_fields(orig: &Listen) -> Listen {
+#[allow(unused)]
+pub(crate) fn Listen_clone_fields(orig: &Listen) -> Listen {
Listen {
this_arg: orig.this_arg,
filtered_block_connected: Clone::clone(&orig.filtered_block_connected),
use lightning::chain::Listen as rustListen;
impl rustListen for Listen {
- fn filtered_block_connected(&self, mut header: &bitcoin::blockdata::block::BlockHeader, mut txdata: &lightning::chain::transaction::TransactionData, mut height: u32) {
+ fn filtered_block_connected(&self, mut header: &bitcoin::blockdata::block::Header, mut txdata: &lightning::chain::transaction::TransactionData, mut height: u32) {
let mut local_header = { let mut s = [0u8; 80]; s[..].copy_from_slice(&::bitcoin::consensus::encode::serialize(header)); s };
let mut local_txdata = Vec::new(); for item in txdata.iter() { local_txdata.push( { let (mut orig_txdata_0_0, mut orig_txdata_0_1) = item; let mut local_txdata_0 = (orig_txdata_0_0, crate::c_types::Transaction::from_bitcoin(&orig_txdata_0_1)).into(); local_txdata_0 }); };
(self.filtered_block_connected)(self.this_arg, &local_header, local_txdata.into(), height)
let mut local_block = ::bitcoin::consensus::encode::serialize(block);
(self.block_connected)(self.this_arg, crate::c_types::u8slice::from_slice(&local_block), height)
}
- fn block_disconnected(&self, mut header: &bitcoin::blockdata::block::BlockHeader, mut height: u32) {
+ fn block_disconnected(&self, mut header: &bitcoin::blockdata::block::Header, mut height: u32) {
let mut local_header = { let mut s = [0u8; 80]; s[..].copy_from_slice(&::bitcoin::consensus::encode::serialize(header)); s };
(self.block_disconnected)(self.this_arg, &local_header, height)
}
self
}
}
+impl core::ops::DerefMut for Listen {
+ fn deref_mut(&mut self) -> &mut Self {
+ self
+ }
+}
/// Calls the free function if one is set
#[no_mangle]
pub extern "C" fn Listen_free(this_ptr: Listen) { }
}
}
}
-/// The `Confirm` trait is used to notify when transactions have been confirmed on chain or
-/// unconfirmed during a chain reorganization.
+/// The `Confirm` trait is used to notify LDK when relevant transactions have been confirmed on
+/// chain or unconfirmed during a chain reorganization.
///
/// Clients sourcing chain data using a transaction-oriented API should prefer this interface over
-/// [`Listen`]. For instance, an Electrum client may implement [`Filter`] by subscribing to activity
-/// related to registered transactions and outputs. Upon notification, it would pass along the
-/// matching transactions using this interface.
+/// [`Listen`]. For instance, an Electrum-based transaction sync implementation may implement
+/// [`Filter`] to subscribe to relevant transactions and unspent outputs it should monitor for
+/// on-chain activity. Then, it needs to notify LDK via this interface upon observing any changes
+/// with reference to the confirmation status of the monitored objects.
///
/// # Use
-///
/// The intended use is as follows:
-/// - Call [`transactions_confirmed`] to process any on-chain activity of interest.
-/// - Call [`transaction_unconfirmed`] to process any transaction returned by [`get_relevant_txids`]
-/// that has been reorganized out of the chain.
-/// - Call [`best_block_updated`] whenever a new chain tip becomes available.
+/// - Call [`transactions_confirmed`] to notify LDK whenever any of the registered transactions or
+/// outputs are, respectively, confirmed or spent on chain.
+/// - Call [`transaction_unconfirmed`] to notify LDK whenever any transaction returned by
+/// [`get_relevant_txids`] is no longer confirmed in the block with the given block hash.
+/// - Call [`best_block_updated`] to notify LDK whenever a new chain tip becomes available.
///
/// # Order
///
/// Clients must call these methods in chain order. Specifically:
-/// - Transactions confirmed in a block must be given before transactions confirmed in a later
-/// block.
+/// - Transactions which are confirmed in a particular block must be given before transactions
+/// confirmed in a later block.
/// - Dependent transactions within the same block must be given in topological order, possibly in
/// separate calls.
-/// - Unconfirmed transactions must be given after the original confirmations and before any
-/// reconfirmation.
+/// - All unconfirmed transactions must be given after the original confirmations and before *any*
+/// reconfirmations, i.e., [`transactions_confirmed`] and [`transaction_unconfirmed`] calls should
+/// never be interleaved, but always conduced *en bloc*.
+/// - Any reconfirmed transactions need to be explicitly unconfirmed before they are reconfirmed
+/// in regard to the new block.
///
/// See individual method documentation for further details.
///
/// 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,
- /// Processes transactions confirmed in a block with a given header and height.
+ /// Notifies LDK of transactions confirmed in a block with a given header and height.
///
- /// Should be called for any transactions registered by [`Filter::register_tx`] or any
+ /// Must be called for any transactions registered by [`Filter::register_tx`] or any
/// transactions spending an output registered by [`Filter::register_output`]. Such transactions
/// appearing in the same block do not need to be included in the same call; instead, multiple
/// calls with additional transactions may be made so long as they are made in [chain order].
/// [chain order]: Confirm#order
/// [`best_block_updated`]: Self::best_block_updated
pub transactions_confirmed: extern "C" fn (this_arg: *const c_void, header: *const [u8; 80], txdata: crate::c_types::derived::CVec_C2Tuple_usizeTransactionZZ, height: u32),
- /// Processes a transaction that is no longer confirmed as result of a chain reorganization.
+ /// Notifies LDK of a transaction that is no longer confirmed as result of a chain reorganization.
///
- /// Should be called for any transaction returned by [`get_relevant_txids`] if it has been
- /// reorganized out of the best chain. Once called, the given transaction will not be returned
+ /// Must be called for any transaction returned by [`get_relevant_txids`] if it has been
+ /// reorganized out of the best chain or if it is no longer confirmed in the block with the
+ /// given block hash. Once called, the given transaction will not be returned
/// by [`get_relevant_txids`], unless it has been reconfirmed via [`transactions_confirmed`].
///
/// [`get_relevant_txids`]: Self::get_relevant_txids
/// [`transactions_confirmed`]: Self::transactions_confirmed
pub transaction_unconfirmed: extern "C" fn (this_arg: *const c_void, txid: *const [u8; 32]),
- /// Processes an update to the best header connected at the given height.
+ /// Notifies LDK of an update to the best header connected at the given height.
///
- /// Should be called when a new header is available but may be skipped for intermediary blocks
- /// if they become available at the same time.
+ /// Must be called whenever a new chain tip becomes available. May be skipped for intermediary
+ /// blocks.
pub best_block_updated: extern "C" fn (this_arg: *const c_void, header: *const [u8; 80], height: u32),
- /// Returns transactions that should be monitored for reorganization out of the chain.
+ /// Returns transactions that must be monitored for reorganization out of the chain along
+ /// with the height and the hash of the block as part of which it had been previously confirmed.
+ ///
+ /// Note that the returned `Option<BlockHash>` might be `None` for channels created with LDK
+ /// 0.0.112 and prior, in which case you need to manually track previous confirmations.
///
/// Will include any transactions passed to [`transactions_confirmed`] that have insufficient
/// confirmations to be safe from a chain reorganization. Will not include any transactions
/// passed to [`transaction_unconfirmed`], unless later reconfirmed.
///
- /// May be called to determine the subset of transactions that must still be monitored for
+ /// Must be called to determine the subset of transactions that must be monitored for
/// reorganization. Will be idempotent between calls but may change as a result of calls to the
- /// other interface methods. Thus, this is useful to determine which transactions may need to be
+ /// other interface methods. Thus, this is useful to determine which transactions must be
/// given to [`transaction_unconfirmed`].
///
+ /// If any of the returned transactions are confirmed in a block other than the one with the
+ /// given hash at the given height, they need to be unconfirmed and reconfirmed via
+ /// [`transaction_unconfirmed`] and [`transactions_confirmed`], respectively.
+ ///
/// [`transactions_confirmed`]: Self::transactions_confirmed
/// [`transaction_unconfirmed`]: Self::transaction_unconfirmed
- #[must_use]
- pub get_relevant_txids: extern "C" fn (this_arg: *const c_void) -> crate::c_types::derived::CVec_TxidZ,
+ pub get_relevant_txids: extern "C" fn (this_arg: *const c_void) -> crate::c_types::derived::CVec_C3Tuple_ThirtyTwoBytesu32COption_ThirtyTwoBytesZZZ,
/// 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 Confirm {}
unsafe impl Sync for Confirm {}
-#[no_mangle]
-pub(crate) extern "C" fn Confirm_clone_fields(orig: &Confirm) -> Confirm {
+#[allow(unused)]
+pub(crate) fn Confirm_clone_fields(orig: &Confirm) -> Confirm {
Confirm {
this_arg: orig.this_arg,
transactions_confirmed: Clone::clone(&orig.transactions_confirmed),
use lightning::chain::Confirm as rustConfirm;
impl rustConfirm for Confirm {
- fn transactions_confirmed(&self, mut header: &bitcoin::blockdata::block::BlockHeader, mut txdata: &lightning::chain::transaction::TransactionData, mut height: u32) {
+ fn transactions_confirmed(&self, mut header: &bitcoin::blockdata::block::Header, mut txdata: &lightning::chain::transaction::TransactionData, mut height: u32) {
let mut local_header = { let mut s = [0u8; 80]; s[..].copy_from_slice(&::bitcoin::consensus::encode::serialize(header)); s };
let mut local_txdata = Vec::new(); for item in txdata.iter() { local_txdata.push( { let (mut orig_txdata_0_0, mut orig_txdata_0_1) = item; let mut local_txdata_0 = (orig_txdata_0_0, crate::c_types::Transaction::from_bitcoin(&orig_txdata_0_1)).into(); local_txdata_0 }); };
(self.transactions_confirmed)(self.this_arg, &local_header, local_txdata.into(), height)
}
fn transaction_unconfirmed(&self, mut txid: &bitcoin::hash_types::Txid) {
- (self.transaction_unconfirmed)(self.this_arg, txid.as_inner())
+ (self.transaction_unconfirmed)(self.this_arg, txid.as_ref())
}
- fn best_block_updated(&self, mut header: &bitcoin::blockdata::block::BlockHeader, mut height: u32) {
+ fn best_block_updated(&self, mut header: &bitcoin::blockdata::block::Header, mut height: u32) {
let mut local_header = { let mut s = [0u8; 80]; s[..].copy_from_slice(&::bitcoin::consensus::encode::serialize(header)); s };
(self.best_block_updated)(self.this_arg, &local_header, height)
}
- fn get_relevant_txids(&self) -> Vec<bitcoin::hash_types::Txid> {
+ fn get_relevant_txids(&self) -> Vec<(bitcoin::hash_types::Txid, u32, Option<bitcoin::hash_types::BlockHash>)> {
let mut ret = (self.get_relevant_txids)(self.this_arg);
- let mut local_ret = Vec::new(); for mut item in ret.into_rust().drain(..) { local_ret.push( { ::bitcoin::hash_types::Txid::from_slice(&item.data[..]).unwrap() }); };
+ let mut local_ret = Vec::new(); for mut item in ret.into_rust().drain(..) { local_ret.push( { let (mut orig_ret_0_0, mut orig_ret_0_1, mut orig_ret_0_2) = item.to_rust(); let mut local_orig_ret_0_2 = { /*orig_ret_0_2*/ let orig_ret_0_2_opt = orig_ret_0_2; if orig_ret_0_2_opt.is_none() { None } else { Some({ { ::bitcoin::hash_types::BlockHash::from_slice(&{ orig_ret_0_2_opt.take() }.data[..]).unwrap() }})} }; let mut local_ret_0 = (::bitcoin::hash_types::Txid::from_slice(&orig_ret_0_0.data[..]).unwrap(), orig_ret_0_1, local_orig_ret_0_2); local_ret_0 }); };
local_ret
}
}
self
}
}
+impl core::ops::DerefMut for Confirm {
+ fn deref_mut(&mut self) -> &mut Self {
+ self
+ }
+}
/// Calls the free function if one is set
#[no_mangle]
pub extern "C" fn Confirm_free(this_ptr: Confirm) { }
}
}
/// An enum representing the status of a channel monitor update persistence.
+///
+/// These are generally used as the return value for an implementation of [`Persist`] which is used
+/// as the storage layer for a [`ChainMonitor`]. See the docs on [`Persist`] for a high-level
+/// explanation of how to handle different cases.
+///
+/// While `UnrecoverableError` is provided as a failure variant, it is not truly \"handled\" on the
+/// calling side, and generally results in an immediate panic. For those who prefer to avoid
+/// panics, `InProgress` can be used and you can retry the update operation in the background or
+/// shut down cleanly.
+///
+/// Note that channels should generally *not* be force-closed after a persistence failure.
+/// Force-closing with the latest [`ChannelMonitorUpdate`] applied may result in a transaction
+/// being broadcast which can only be spent by the latest [`ChannelMonitor`]! Thus, if the
+/// latest [`ChannelMonitor`] is not durably persisted anywhere and exists only in memory, naively
+/// calling [`ChannelManager::force_close_broadcasting_latest_txn`] *may result in loss of funds*!
+///
+/// [`Persist`]: chainmonitor::Persist
+/// [`ChainMonitor`]: chainmonitor::ChainMonitor
+/// [`ChannelManager::force_close_broadcasting_latest_txn`]: crate::ln::channelmanager::ChannelManager::force_close_broadcasting_latest_txn
#[derive(Clone)]
#[must_use]
#[repr(C)]
/// 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).
+ /// Indicates that the update will happen asynchronously in the background or that a transient
+ /// failure occurred which is being retried in the background and will eventually complete.
///
- /// 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) 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.
+ /// This will \"freeze\" a channel, preventing us from revoking old states or submitting a new
+ /// commitment transaction to the counterparty. Once the update(s) which are `InProgress` have
+ /// been completed, a [`MonitorEvent::Completed`] can be used to restore the channel to an
+ /// operational state.
///
/// 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
/// 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
+ /// For deployments where a copy of [`ChannelMonitor`]s and other local state are backed up in
+ /// a remote location (with local copies persisted immediately), it is anticipated that all
/// updates will return [`InProgress`] until the remote copies could be updated.
///
- /// [`PermanentFailure`]: ChannelMonitorUpdateStatus::PermanentFailure
+ /// Note that while fully asynchronous persistence of [`ChannelMonitor`] data is generally
+ /// reliable, this feature is considered beta, and a handful of edge-cases remain. Until the
+ /// remaining cases are fixed, in rare cases, *using this feature may lead to funds loss*.
+ ///
/// [`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).
- ///
- /// 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.
- ///
- /// 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).
- ///
- /// 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 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.
+ /// Indicates that an update has failed and will not complete at any point in the future.
///
- /// 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.
+ /// Currently returning this variant will cause LDK to immediately panic to encourage immediate
+ /// shutdown. In the future this may be updated to disconnect peers and refuse to continue
+ /// normal operation without a panic.
///
- /// 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.
+ /// Applications which wish to perform an orderly shutdown after failure should consider
+ /// returning [`InProgress`] instead and simply shut down without ever marking the update
+ /// complete.
///
- /// [`PermanentFailure`]: ChannelMonitorUpdateStatus::PermanentFailure
- /// [`ChannelManager`]: crate::ln::channelmanager::ChannelManager
- PermanentFailure,
+ /// [`InProgress`]: ChannelMonitorUpdateStatus::InProgress
+ UnrecoverableError,
}
use lightning::chain::ChannelMonitorUpdateStatus as ChannelMonitorUpdateStatusImport;
pub(crate) type nativeChannelMonitorUpdateStatus = ChannelMonitorUpdateStatusImport;
match self {
ChannelMonitorUpdateStatus::Completed => nativeChannelMonitorUpdateStatus::Completed,
ChannelMonitorUpdateStatus::InProgress => nativeChannelMonitorUpdateStatus::InProgress,
- ChannelMonitorUpdateStatus::PermanentFailure => nativeChannelMonitorUpdateStatus::PermanentFailure,
+ ChannelMonitorUpdateStatus::UnrecoverableError => nativeChannelMonitorUpdateStatus::UnrecoverableError,
}
}
#[allow(unused)]
match self {
ChannelMonitorUpdateStatus::Completed => nativeChannelMonitorUpdateStatus::Completed,
ChannelMonitorUpdateStatus::InProgress => nativeChannelMonitorUpdateStatus::InProgress,
- ChannelMonitorUpdateStatus::PermanentFailure => nativeChannelMonitorUpdateStatus::PermanentFailure,
+ ChannelMonitorUpdateStatus::UnrecoverableError => nativeChannelMonitorUpdateStatus::UnrecoverableError,
}
}
#[allow(unused)]
- pub(crate) fn from_native(native: &nativeChannelMonitorUpdateStatus) -> Self {
+ pub(crate) fn from_native(native: &ChannelMonitorUpdateStatusImport) -> Self {
+ let native = unsafe { &*(native as *const _ as *const c_void as *const nativeChannelMonitorUpdateStatus) };
match native {
nativeChannelMonitorUpdateStatus::Completed => ChannelMonitorUpdateStatus::Completed,
nativeChannelMonitorUpdateStatus::InProgress => ChannelMonitorUpdateStatus::InProgress,
- nativeChannelMonitorUpdateStatus::PermanentFailure => ChannelMonitorUpdateStatus::PermanentFailure,
+ nativeChannelMonitorUpdateStatus::UnrecoverableError => ChannelMonitorUpdateStatus::UnrecoverableError,
}
}
#[allow(unused)]
match native {
nativeChannelMonitorUpdateStatus::Completed => ChannelMonitorUpdateStatus::Completed,
nativeChannelMonitorUpdateStatus::InProgress => ChannelMonitorUpdateStatus::InProgress,
- nativeChannelMonitorUpdateStatus::PermanentFailure => ChannelMonitorUpdateStatus::PermanentFailure,
+ nativeChannelMonitorUpdateStatus::UnrecoverableError => ChannelMonitorUpdateStatus::UnrecoverableError,
}
}
}
pub extern "C" fn ChannelMonitorUpdateStatus_clone(orig: &ChannelMonitorUpdateStatus) -> ChannelMonitorUpdateStatus {
orig.clone()
}
+#[allow(unused)]
+/// Used only if an object of this type is returned as a trait impl by a method
+pub(crate) extern "C" fn ChannelMonitorUpdateStatus_clone_void(this_ptr: *const c_void) -> *mut c_void {
+ Box::into_raw(Box::new(unsafe { (*(this_ptr as *const ChannelMonitorUpdateStatus)).clone() })) as *mut c_void
+}
+#[allow(unused)]
+/// Used only if an object of this type is returned as a trait impl by a method
+pub(crate) extern "C" fn ChannelMonitorUpdateStatus_free_void(this_ptr: *mut c_void) {
+ let _ = unsafe { Box::from_raw(this_ptr as *mut ChannelMonitorUpdateStatus) };
+}
#[no_mangle]
/// Utility method to constructs a new Completed-variant ChannelMonitorUpdateStatus
pub extern "C" fn ChannelMonitorUpdateStatus_completed() -> 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}
+/// Utility method to constructs a new UnrecoverableError-variant ChannelMonitorUpdateStatus
+pub extern "C" fn ChannelMonitorUpdateStatus_unrecoverable_error() -> ChannelMonitorUpdateStatus {
+ ChannelMonitorUpdateStatus::UnrecoverableError}
+/// Get a string which allows debug introspection of a ChannelMonitorUpdateStatus object
+pub extern "C" fn ChannelMonitorUpdateStatus_debug_str_void(o: *const c_void) -> Str {
+ alloc::format!("{:?}", unsafe { o as *const crate::lightning::chain::ChannelMonitorUpdateStatus }).into()}
/// Checks if two ChannelMonitorUpdateStatuss contain equal inner contents.
/// This ignores pointers and is_owned flags and looks at the values in fields.
#[no_mangle]
/// blocks are connected and disconnected.
///
/// Each channel is associated with a [`ChannelMonitor`]. Implementations of this trait are
-/// responsible for maintaining a set of monitors such that they can be updated accordingly as
-/// channel state changes and HTLCs are resolved. See method documentation for specific
-/// requirements.
-///
-/// Implementations **must** ensure that updates are successfully applied and persisted upon method
-/// completion. If an update fails with a [`PermanentFailure`], then it must immediately shut down
-/// without taking any further action such as persisting the current state.
+/// responsible for maintaining a set of monitors such that they can be updated as channel state
+/// changes. On each update, *all copies* of a [`ChannelMonitor`] must be updated and the update
+/// persisted to disk to ensure that the latest [`ChannelMonitor`] state can be reloaded if the
+/// application crashes.
///
-/// 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 [`ChannelMonitorUpdateStatus`] for more details about how to handle
-/// multiple instances.
-///
-/// [`PermanentFailure`]: ChannelMonitorUpdateStatus::PermanentFailure
+/// See method documentation and [`ChannelMonitorUpdateStatus`] for specific requirements.
#[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 [`ChannelMonitorUpdateStatus::PermanentFailure`] if
- /// the given `funding_txo` has previously been registered via `watch_channel`.
+ /// A return of `Err(())` indicates that the channel should immediately be force-closed without
+ /// broadcasting the funding transaction.
+ ///
+ /// If the given `funding_txo` has previously been registered via `watch_channel`, `Err(())`
+ /// must be returned.
///
/// [`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::lightning::chain::ChannelMonitorUpdateStatus,
+ 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_ChannelMonitorUpdateStatusNoneZ,
/// Updates a channel identified by `funding_txo` by applying `update` to its monitor.
///
- /// Implementations must call [`update_monitor`] with the given update. See
- /// [`ChannelMonitorUpdateStatus`] for invariants around returning an error.
+ /// Implementations must call [`ChannelMonitor::update_monitor`] with the given update. This
+ /// may fail (returning an `Err(())`), in which case this should return
+ /// [`ChannelMonitorUpdateStatus::InProgress`] (and the update should never complete). This
+ /// generally implies the channel has been closed (either by the funding outpoint being spent
+ /// on-chain or the [`ChannelMonitor`] having decided to do so and broadcasted a transaction),
+ /// and the [`ChannelManager`] state will be updated once it sees the funding spend on-chain.
///
- /// [`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::lightning::chain::ChannelMonitorUpdateStatus,
+ /// In general, persistence failures should be retried after returning
+ /// [`ChannelMonitorUpdateStatus::InProgress`] and eventually complete. If a failure truly
+ /// cannot be retried, the node should shut down immediately after returning
+ /// [`ChannelMonitorUpdateStatus::UnrecoverableError`], see its documentation for more info.
+ ///
+ /// [`ChannelManager`]: crate::ln::channelmanager::ChannelManager
+ 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.
///
///
/// For details on asynchronous [`ChannelMonitor`] updating and returning
/// [`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.
/// Does not need to free the outer struct containing function pointers and may be NULL is no resources need to be freed.
}
unsafe impl Send for Watch {}
unsafe impl Sync for Watch {}
-#[no_mangle]
-pub(crate) extern "C" fn Watch_clone_fields(orig: &Watch) -> Watch {
+#[allow(unused)]
+pub(crate) fn Watch_clone_fields(orig: &Watch) -> Watch {
Watch {
this_arg: orig.this_arg,
watch_channel: Clone::clone(&orig.watch_channel),
}
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>) -> lightning::chain::ChannelMonitorUpdateStatus {
+impl rustWatch<crate::lightning::sign::ecdsa::WriteableEcdsaChannelSigner> for Watch {
+ fn watch_channel(&self, mut funding_txo: lightning::chain::transaction::OutPoint, mut monitor: lightning::chain::channelmonitor::ChannelMonitor<crate::lightning::sign::ecdsa::WriteableEcdsaChannelSigner>) -> Result<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 });
- ret.into_native()
+ let mut local_ret = match ret.result_ok { true => Ok( { (*unsafe { Box::from_raw(<*mut _>::take_ptr(&mut ret.contents.result)) }).into_native() }), false => Err( { () /*(*unsafe { Box::from_raw(<*mut _>::take_ptr(&mut ret.contents.err)) })*/ })};
+ local_ret
}
- 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 });
+ 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: unsafe { ObjOps::nonnull_ptr_to_inner((update as *const lightning::chain::channelmonitor::ChannelMonitorUpdate<>) as *mut _) }, is_owned: false });
ret.into_native()
}
fn release_pending_monitor_events(&self) -> Vec<(lightning::chain::transaction::OutPoint, Vec<lightning::chain::channelmonitor::MonitorEvent>, Option<bitcoin::secp256k1::PublicKey>)> {
self
}
}
+impl core::ops::DerefMut for Watch {
+ fn deref_mut(&mut self) -> &mut Self {
+ self
+ }
+}
/// Calls the free function if one is set
#[no_mangle]
pub extern "C" fn Watch_free(this_ptr: Watch) { }
}
unsafe impl Send for Filter {}
unsafe impl Sync for Filter {}
-#[no_mangle]
-pub(crate) extern "C" fn Filter_clone_fields(orig: &Filter) -> Filter {
+#[allow(unused)]
+pub(crate) fn Filter_clone_fields(orig: &Filter) -> Filter {
Filter {
this_arg: orig.this_arg,
register_tx: Clone::clone(&orig.register_tx),
use lightning::chain::Filter as rustFilter;
impl rustFilter for Filter {
fn register_tx(&self, mut txid: &bitcoin::hash_types::Txid, mut script_pubkey: &bitcoin::blockdata::script::Script) {
- (self.register_tx)(self.this_arg, txid.as_inner(), crate::c_types::u8slice::from_slice(&script_pubkey[..]))
+ (self.register_tx)(self.this_arg, txid.as_ref(), crate::c_types::u8slice::from_slice(script_pubkey.as_ref()))
}
fn register_output(&self, mut output: lightning::chain::WatchedOutput) {
(self.register_output)(self.this_arg, crate::lightning::chain::WatchedOutput { inner: ObjOps::heap_alloc(output), is_owned: true })
self
}
}
+impl core::ops::DerefMut for Filter {
+ fn deref_mut(&mut self) -> &mut Self {
+ self
+ }
+}
/// Calls the free function if one is set
#[no_mangle]
pub extern "C" fn Filter_free(this_ptr: Filter) { }
#[allow(unused)]
/// Used only if an object of this type is returned as a trait impl by a method
pub(crate) extern "C" fn WatchedOutput_free_void(this_ptr: *mut c_void) {
- unsafe { let _ = Box::from_raw(this_ptr as *mut nativeWatchedOutput); }
+ let _ = unsafe { Box::from_raw(this_ptr as *mut nativeWatchedOutput) };
}
#[allow(unused)]
impl WatchedOutput {
}
}
/// First block where the transaction output may have been spent.
-///
-/// Note that the return value (or a relevant inner pointer) may be NULL or all-0s to represent None
#[no_mangle]
-pub extern "C" fn WatchedOutput_get_block_hash(this_ptr: &WatchedOutput) -> crate::c_types::ThirtyTwoBytes {
+pub extern "C" fn WatchedOutput_get_block_hash(this_ptr: &WatchedOutput) -> crate::c_types::derived::COption_ThirtyTwoBytesZ {
let mut inner_val = &mut this_ptr.get_native_mut_ref().block_hash;
- let mut local_inner_val = if inner_val.is_none() { crate::c_types::ThirtyTwoBytes::null() } else { { crate::c_types::ThirtyTwoBytes { data: (inner_val.unwrap()).into_inner() } } };
+ let mut local_inner_val = if inner_val.is_none() { crate::c_types::derived::COption_ThirtyTwoBytesZ::None } else { crate::c_types::derived::COption_ThirtyTwoBytesZ::Some(/* WARNING: CLONING CONVERSION HERE! &Option<Enum> is otherwise un-expressable. */ { crate::c_types::ThirtyTwoBytes { data: *(*inner_val.as_ref().unwrap()).clone().as_ref() } }) };
local_inner_val
}
/// First block where the transaction output may have been spent.
-///
-/// Note that val (or a relevant inner pointer) may be NULL or all-0s to represent None
#[no_mangle]
-pub extern "C" fn WatchedOutput_set_block_hash(this_ptr: &mut WatchedOutput, mut val: crate::c_types::ThirtyTwoBytes) {
- let mut local_val = if val.data == [0; 32] { None } else { Some( { ::bitcoin::hash_types::BlockHash::from_slice(&val.data[..]).unwrap() }) };
+pub extern "C" fn WatchedOutput_set_block_hash(this_ptr: &mut WatchedOutput, mut val: crate::c_types::derived::COption_ThirtyTwoBytesZ) {
+ let mut local_val = { /*val*/ let val_opt = val; if val_opt.is_none() { None } else { Some({ { ::bitcoin::hash_types::BlockHash::from_slice(&{ val_opt.take() }.data[..]).unwrap() }})} };
unsafe { &mut *ObjOps::untweak_ptr(this_ptr.inner) }.block_hash = local_val;
}
/// Outpoint identifying the transaction output.
}
/// Spending condition of the transaction output.
#[no_mangle]
-pub extern "C" fn WatchedOutput_get_script_pubkey(this_ptr: &WatchedOutput) -> crate::c_types::u8slice {
+pub extern "C" fn WatchedOutput_get_script_pubkey(this_ptr: &WatchedOutput) -> crate::c_types::derived::CVec_u8Z {
let mut inner_val = &mut this_ptr.get_native_mut_ref().script_pubkey;
- crate::c_types::u8slice::from_slice(&inner_val[..])
+ inner_val.as_bytes().to_vec().into()
}
/// Spending condition of the transaction output.
#[no_mangle]
pub extern "C" fn WatchedOutput_set_script_pubkey(this_ptr: &mut WatchedOutput, mut val: crate::c_types::derived::CVec_u8Z) {
- unsafe { &mut *ObjOps::untweak_ptr(this_ptr.inner) }.script_pubkey = ::bitcoin::blockdata::script::Script::from(val.into_rust());
+ unsafe { &mut *ObjOps::untweak_ptr(this_ptr.inner) }.script_pubkey = ::bitcoin::blockdata::script::ScriptBuf::from(val.into_rust());
}
/// Constructs a new WatchedOutput given each field
#[must_use]
#[no_mangle]
-pub extern "C" fn WatchedOutput_new(mut block_hash_arg: crate::c_types::ThirtyTwoBytes, mut outpoint_arg: crate::lightning::chain::transaction::OutPoint, mut script_pubkey_arg: crate::c_types::derived::CVec_u8Z) -> WatchedOutput {
- let mut local_block_hash_arg = if block_hash_arg.data == [0; 32] { None } else { Some( { ::bitcoin::hash_types::BlockHash::from_slice(&block_hash_arg.data[..]).unwrap() }) };
+pub extern "C" fn WatchedOutput_new(mut block_hash_arg: crate::c_types::derived::COption_ThirtyTwoBytesZ, mut outpoint_arg: crate::lightning::chain::transaction::OutPoint, mut script_pubkey_arg: crate::c_types::derived::CVec_u8Z) -> WatchedOutput {
+ let mut local_block_hash_arg = { /*block_hash_arg*/ let block_hash_arg_opt = block_hash_arg; if block_hash_arg_opt.is_none() { None } else { Some({ { ::bitcoin::hash_types::BlockHash::from_slice(&{ block_hash_arg_opt.take() }.data[..]).unwrap() }})} };
WatchedOutput { inner: ObjOps::heap_alloc(nativeWatchedOutput {
block_hash: local_block_hash_arg,
outpoint: *unsafe { Box::from_raw(outpoint_arg.take_inner()) },
- script_pubkey: ::bitcoin::blockdata::script::Script::from(script_pubkey_arg.into_rust()),
+ script_pubkey: ::bitcoin::blockdata::script::ScriptBuf::from(script_pubkey_arg.into_rust()),
}), is_owned: true }
}
impl Clone for WatchedOutput {
#[allow(unused)]
/// Used only if an object of this type is returned as a trait impl by a method
pub(crate) extern "C" fn WatchedOutput_clone_void(this_ptr: *const c_void) -> *mut c_void {
- Box::into_raw(Box::new(unsafe { (*(this_ptr as *mut nativeWatchedOutput)).clone() })) as *mut c_void
+ Box::into_raw(Box::new(unsafe { (*(this_ptr as *const nativeWatchedOutput)).clone() })) as *mut c_void
}
#[no_mangle]
/// Creates a copy of the WatchedOutput
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.
+/// Generates a non-cryptographic 64-bit hash of the WatchedOutput.
#[no_mangle]
pub extern "C" fn WatchedOutput_hash(o: &WatchedOutput) -> u64 {
if o.inner.is_null() { return 0; }
projects / ldk-c-bindings / blobdiff