1 // This file is Copyright its original authors, visible in version control
2 // history and in the source files from which this was generated.
4 // This file is licensed under the license available in the LICENSE or LICENSE.md
5 // file in the root of this repository or, if no such file exists, the same
6 // license as that which applies to the original source files from which this
7 // source was automatically generated.
9 //! Structs and traits which allow other parts of rust-lightning to interact with the blockchain.
11 use std::str::FromStr;
13 use bitcoin::hashes::Hash;
14 use crate::c_types::*;
16 pub mod chaininterface;
18 pub mod channelmonitor;
20 pub mod keysinterface;
23 use std::str::FromStr;
25 use bitcoin::hashes::Hash;
26 use crate::c_types::*;
31 use std::str::FromStr;
33 use bitcoin::hashes::Hash;
34 use crate::c_types::*;
38 use lightning::chain::BestBlock as nativeBestBlockImport;
39 type nativeBestBlock = nativeBestBlockImport;
41 /// The best known block as identified by its hash and height.
44 pub struct BestBlock {
45 /// A pointer to the opaque Rust object.
47 /// Nearly everywhere, inner must be non-null, however in places where
48 /// the Rust equivalent takes an Option, it may be set to null to indicate None.
49 pub inner: *mut nativeBestBlock,
50 /// Indicates that this is the only struct which contains the same pointer.
52 /// Rust functions which take ownership of an object provided via an argument require
53 /// this to be true and invalidate the object pointed to by inner.
57 impl Drop for BestBlock {
59 if self.is_owned && !<*mut nativeBestBlock>::is_null(self.inner) {
60 let _ = unsafe { Box::from_raw(ObjOps::untweak_ptr(self.inner)) };
64 /// Frees any resources used by the BestBlock, if is_owned is set and inner is non-NULL.
66 pub extern "C" fn BestBlock_free(this_obj: BestBlock) { }
68 /// Used only if an object of this type is returned as a trait impl by a method
69 extern "C" fn BestBlock_free_void(this_ptr: *mut c_void) {
70 unsafe { let _ = Box::from_raw(this_ptr as *mut nativeBestBlock); }
74 pub(crate) fn get_native_ref(&self) -> &'static nativeBestBlock {
75 unsafe { &*ObjOps::untweak_ptr(self.inner) }
77 pub(crate) fn get_native_mut_ref(&self) -> &'static mut nativeBestBlock {
78 unsafe { &mut *ObjOps::untweak_ptr(self.inner) }
80 /// When moving out of the pointer, we have to ensure we aren't a reference, this makes that easy
81 pub(crate) fn take_inner(mut self) -> *mut nativeBestBlock {
82 assert!(self.is_owned);
83 let ret = ObjOps::untweak_ptr(self.inner);
84 self.inner = std::ptr::null_mut();
88 impl Clone for BestBlock {
89 fn clone(&self) -> Self {
91 inner: if <*mut nativeBestBlock>::is_null(self.inner) { std::ptr::null_mut() } else {
92 ObjOps::heap_alloc(unsafe { &*ObjOps::untweak_ptr(self.inner) }.clone()) },
98 /// Used only if an object of this type is returned as a trait impl by a method
99 pub(crate) extern "C" fn BestBlock_clone_void(this_ptr: *const c_void) -> *mut c_void {
100 Box::into_raw(Box::new(unsafe { (*(this_ptr as *mut nativeBestBlock)).clone() })) as *mut c_void
103 /// Creates a copy of the BestBlock
104 pub extern "C" fn BestBlock_clone(orig: &BestBlock) -> BestBlock {
107 /// Constructs a `BestBlock` that represents the genesis block at height 0 of the given
111 pub extern "C" fn BestBlock_from_genesis(mut network: crate::bitcoin::network::Network) -> BestBlock {
112 let mut ret = lightning::chain::BestBlock::from_genesis(network.into_bitcoin());
113 BestBlock { inner: ObjOps::heap_alloc(ret), is_owned: true }
116 /// Returns a `BestBlock` as identified by the given block hash and height.
119 pub extern "C" fn BestBlock_new(mut block_hash: crate::c_types::ThirtyTwoBytes, mut height: u32) -> BestBlock {
120 let mut ret = lightning::chain::BestBlock::new(::bitcoin::hash_types::BlockHash::from_slice(&block_hash.data[..]).unwrap(), height);
121 BestBlock { inner: ObjOps::heap_alloc(ret), is_owned: true }
124 /// Returns the best block hash.
127 pub extern "C" fn BestBlock_block_hash(this_arg: &BestBlock) -> crate::c_types::ThirtyTwoBytes {
128 let mut ret = unsafe { &*ObjOps::untweak_ptr(this_arg.inner) }.block_hash();
129 crate::c_types::ThirtyTwoBytes { data: ret.into_inner() }
132 /// Returns the best block height.
135 pub extern "C" fn BestBlock_height(this_arg: &BestBlock) -> u32 {
136 let mut ret = unsafe { &*ObjOps::untweak_ptr(this_arg.inner) }.height();
140 /// An error when accessing the chain via [`Access`].
144 pub enum AccessError {
145 /// The requested chain is unknown.
147 /// The requested transaction doesn't exist or hasn't confirmed.
150 use lightning::chain::AccessError as nativeAccessError;
153 pub(crate) fn to_native(&self) -> nativeAccessError {
155 AccessError::UnknownChain => nativeAccessError::UnknownChain,
156 AccessError::UnknownTx => nativeAccessError::UnknownTx,
160 pub(crate) fn into_native(self) -> nativeAccessError {
162 AccessError::UnknownChain => nativeAccessError::UnknownChain,
163 AccessError::UnknownTx => nativeAccessError::UnknownTx,
167 pub(crate) fn from_native(native: &nativeAccessError) -> Self {
169 nativeAccessError::UnknownChain => AccessError::UnknownChain,
170 nativeAccessError::UnknownTx => AccessError::UnknownTx,
174 pub(crate) fn native_into(native: nativeAccessError) -> Self {
176 nativeAccessError::UnknownChain => AccessError::UnknownChain,
177 nativeAccessError::UnknownTx => AccessError::UnknownTx,
181 /// Creates a copy of the AccessError
183 pub extern "C" fn AccessError_clone(orig: &AccessError) -> AccessError {
187 /// Utility method to constructs a new UnknownChain-variant AccessError
188 pub extern "C" fn AccessError_unknown_chain() -> AccessError {
189 AccessError::UnknownChain}
191 /// Utility method to constructs a new UnknownTx-variant AccessError
192 pub extern "C" fn AccessError_unknown_tx() -> AccessError {
193 AccessError::UnknownTx}
194 /// The `Access` trait defines behavior for accessing chain data and state, such as blocks and
198 /// An opaque pointer which is passed to your function implementations as an argument.
199 /// This has no meaning in the LDK, and can be NULL or any other value.
200 pub this_arg: *mut c_void,
201 /// Returns the transaction output of a funding transaction encoded by [`short_channel_id`].
202 /// Returns an error if `genesis_hash` is for a different chain or if such a transaction output
205 /// [`short_channel_id`]: https://github.com/lightningnetwork/lightning-rfc/blob/master/07-routing-gossip.md#definition-of-short_channel_id
207 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,
208 /// Frees any resources associated with this object given its this_arg pointer.
209 /// Does not need to free the outer struct containing function pointers and may be NULL is no resources need to be freed.
210 pub free: Option<extern "C" fn(this_arg: *mut c_void)>,
212 unsafe impl Send for Access {}
213 unsafe impl Sync for Access {}
215 pub(crate) extern "C" fn Access_clone_fields(orig: &Access) -> Access {
217 this_arg: orig.this_arg,
218 get_utxo: Clone::clone(&orig.get_utxo),
219 free: Clone::clone(&orig.free),
223 use lightning::chain::Access as rustAccess;
224 impl rustAccess for Access {
225 fn get_utxo(&self, mut genesis_hash: &bitcoin::hash_types::BlockHash, mut short_channel_id: u64) -> Result<bitcoin::blockdata::transaction::TxOut, lightning::chain::AccessError> {
226 let mut ret = (self.get_utxo)(self.this_arg, genesis_hash.as_inner(), short_channel_id);
227 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() })};
232 // We're essentially a pointer already, or at least a set of pointers, so allow us to be used
233 // directly as a Deref trait in higher-level structs:
234 impl std::ops::Deref for Access {
236 fn deref(&self) -> &Self {
240 /// Calls the free function if one is set
242 pub extern "C" fn Access_free(this_ptr: Access) { }
243 impl Drop for Access {
245 if let Some(f) = self.free {
250 /// The `Listen` trait is used to notify when blocks have been connected or disconnected from the
253 /// Useful when needing to replay chain data upon startup or as new chain events occur. Clients
254 /// sourcing chain data using a block-oriented API should prefer this interface over [`Confirm`].
255 /// Such clients fetch the entire header chain whereas clients using [`Confirm`] only fetch headers
259 /// An opaque pointer which is passed to your function implementations as an argument.
260 /// This has no meaning in the LDK, and can be NULL or any other value.
261 pub this_arg: *mut c_void,
262 /// Notifies the listener that a block was added at the given height.
263 pub block_connected: extern "C" fn (this_arg: *const c_void, block: crate::c_types::u8slice, height: u32),
264 /// Notifies the listener that a block was removed at the given height.
265 pub block_disconnected: extern "C" fn (this_arg: *const c_void, header: *const [u8; 80], height: u32),
266 /// Frees any resources associated with this object given its this_arg pointer.
267 /// Does not need to free the outer struct containing function pointers and may be NULL is no resources need to be freed.
268 pub free: Option<extern "C" fn(this_arg: *mut c_void)>,
270 unsafe impl Send for Listen {}
271 unsafe impl Sync for Listen {}
273 pub(crate) extern "C" fn Listen_clone_fields(orig: &Listen) -> Listen {
275 this_arg: orig.this_arg,
276 block_connected: Clone::clone(&orig.block_connected),
277 block_disconnected: Clone::clone(&orig.block_disconnected),
278 free: Clone::clone(&orig.free),
282 use lightning::chain::Listen as rustListen;
283 impl rustListen for Listen {
284 fn block_connected(&self, mut block: &bitcoin::blockdata::block::Block, mut height: u32) {
285 let mut local_block = ::bitcoin::consensus::encode::serialize(block);
286 (self.block_connected)(self.this_arg, crate::c_types::u8slice::from_slice(&local_block), height)
288 fn block_disconnected(&self, mut header: &bitcoin::blockdata::block::BlockHeader, mut height: u32) {
289 let mut local_header = { let mut s = [0u8; 80]; s[..].copy_from_slice(&::bitcoin::consensus::encode::serialize(header)); s };
290 (self.block_disconnected)(self.this_arg, &local_header, height)
294 // We're essentially a pointer already, or at least a set of pointers, so allow us to be used
295 // directly as a Deref trait in higher-level structs:
296 impl std::ops::Deref for Listen {
298 fn deref(&self) -> &Self {
302 /// Calls the free function if one is set
304 pub extern "C" fn Listen_free(this_ptr: Listen) { }
305 impl Drop for Listen {
307 if let Some(f) = self.free {
312 /// The `Confirm` trait is used to notify when transactions have been confirmed on chain or
313 /// unconfirmed during a chain reorganization.
315 /// Clients sourcing chain data using a transaction-oriented API should prefer this interface over
316 /// [`Listen`]. For instance, an Electrum client may implement [`Filter`] by subscribing to activity
317 /// related to registered transactions and outputs. Upon notification, it would pass along the
318 /// matching transactions using this interface.
322 /// The intended use is as follows:
323 /// - Call [`transactions_confirmed`] to process any on-chain activity of interest.
324 /// - Call [`transaction_unconfirmed`] to process any transaction returned by [`get_relevant_txids`]
325 /// that has been reorganized out of the chain.
326 /// - Call [`best_block_updated`] whenever a new chain tip becomes available.
330 /// Clients must call these methods in chain order. Specifically:
331 /// - Transactions confirmed in a block must be given before transactions confirmed in a later
333 /// - Dependent transactions within the same block must be given in topological order, possibly in
335 /// - Unconfirmed transactions must be given after the original confirmations and before any
338 /// See individual method documentation for further details.
340 /// [`transactions_confirmed`]: Self::transactions_confirmed
341 /// [`transaction_unconfirmed`]: Self::transaction_unconfirmed
342 /// [`best_block_updated`]: Self::best_block_updated
343 /// [`get_relevant_txids`]: Self::get_relevant_txids
346 /// An opaque pointer which is passed to your function implementations as an argument.
347 /// This has no meaning in the LDK, and can be NULL or any other value.
348 pub this_arg: *mut c_void,
349 /// Processes transactions confirmed in a block with a given header and height.
351 /// Should be called for any transactions registered by [`Filter::register_tx`] or any
352 /// transactions spending an output registered by [`Filter::register_output`]. Such transactions
353 /// appearing in the same block do not need to be included in the same call; instead, multiple
354 /// calls with additional transactions may be made so long as they are made in [chain order].
356 /// May be called before or after [`best_block_updated`] for the corresponding block. However,
357 /// in the event of a chain reorganization, it must not be called with a `header` that is no
358 /// longer in the chain as of the last call to [`best_block_updated`].
360 /// [chain order]: Confirm#Order
361 /// [`best_block_updated`]: Self::best_block_updated
362 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),
363 /// Processes a transaction that is no longer confirmed as result of a chain reorganization.
365 /// Should be called for any transaction returned by [`get_relevant_txids`] if it has been
366 /// reorganized out of the best chain. Once called, the given transaction should not be returned
367 /// by [`get_relevant_txids`] unless it has been reconfirmed via [`transactions_confirmed`].
369 /// [`get_relevant_txids`]: Self::get_relevant_txids
370 /// [`transactions_confirmed`]: Self::transactions_confirmed
371 pub transaction_unconfirmed: extern "C" fn (this_arg: *const c_void, txid: *const [u8; 32]),
372 /// Processes an update to the best header connected at the given height.
374 /// Should be called when a new header is available but may be skipped for intermediary blocks
375 /// if they become available at the same time.
376 pub best_block_updated: extern "C" fn (this_arg: *const c_void, header: *const [u8; 80], height: u32),
377 /// Returns transactions that should be monitored for reorganization out of the chain.
379 /// Should include any transactions passed to [`transactions_confirmed`] that have insufficient
380 /// confirmations to be safe from a chain reorganization. Should not include any transactions
381 /// passed to [`transaction_unconfirmed`] unless later reconfirmed.
383 /// May be called to determine the subset of transactions that must still be monitored for
384 /// reorganization. Will be idempotent between calls but may change as a result of calls to the
385 /// other interface methods. Thus, this is useful to determine which transactions may need to be
386 /// given to [`transaction_unconfirmed`].
388 /// [`transactions_confirmed`]: Self::transactions_confirmed
389 /// [`transaction_unconfirmed`]: Self::transaction_unconfirmed
391 pub get_relevant_txids: extern "C" fn (this_arg: *const c_void) -> crate::c_types::derived::CVec_TxidZ,
392 /// Frees any resources associated with this object given its this_arg pointer.
393 /// Does not need to free the outer struct containing function pointers and may be NULL is no resources need to be freed.
394 pub free: Option<extern "C" fn(this_arg: *mut c_void)>,
396 unsafe impl Send for Confirm {}
397 unsafe impl Sync for Confirm {}
399 pub(crate) extern "C" fn Confirm_clone_fields(orig: &Confirm) -> Confirm {
401 this_arg: orig.this_arg,
402 transactions_confirmed: Clone::clone(&orig.transactions_confirmed),
403 transaction_unconfirmed: Clone::clone(&orig.transaction_unconfirmed),
404 best_block_updated: Clone::clone(&orig.best_block_updated),
405 get_relevant_txids: Clone::clone(&orig.get_relevant_txids),
406 free: Clone::clone(&orig.free),
410 use lightning::chain::Confirm as rustConfirm;
411 impl rustConfirm for Confirm {
412 fn transactions_confirmed(&self, mut header: &bitcoin::blockdata::block::BlockHeader, mut txdata: &lightning::chain::transaction::TransactionData, mut height: u32) {
413 let mut local_header = { let mut s = [0u8; 80]; s[..].copy_from_slice(&::bitcoin::consensus::encode::serialize(header)); s };
414 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 }); };
415 (self.transactions_confirmed)(self.this_arg, &local_header, local_txdata.into(), height)
417 fn transaction_unconfirmed(&self, mut txid: &bitcoin::hash_types::Txid) {
418 (self.transaction_unconfirmed)(self.this_arg, txid.as_inner())
420 fn best_block_updated(&self, mut header: &bitcoin::blockdata::block::BlockHeader, mut height: u32) {
421 let mut local_header = { let mut s = [0u8; 80]; s[..].copy_from_slice(&::bitcoin::consensus::encode::serialize(header)); s };
422 (self.best_block_updated)(self.this_arg, &local_header, height)
424 fn get_relevant_txids(&self) -> Vec<bitcoin::hash_types::Txid> {
425 let mut ret = (self.get_relevant_txids)(self.this_arg);
426 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() }); };
431 // We're essentially a pointer already, or at least a set of pointers, so allow us to be used
432 // directly as a Deref trait in higher-level structs:
433 impl std::ops::Deref for Confirm {
435 fn deref(&self) -> &Self {
439 /// Calls the free function if one is set
441 pub extern "C" fn Confirm_free(this_ptr: Confirm) { }
442 impl Drop for Confirm {
444 if let Some(f) = self.free {
449 /// The `Watch` trait defines behavior for watching on-chain activity pertaining to channels as
450 /// blocks are connected and disconnected.
452 /// Each channel is associated with a [`ChannelMonitor`]. Implementations of this trait are
453 /// responsible for maintaining a set of monitors such that they can be updated accordingly as
454 /// channel state changes and HTLCs are resolved. See method documentation for specific
457 /// Implementations **must** ensure that updates are successfully applied and persisted upon method
458 /// completion. If an update fails with a [`PermanentFailure`], then it must immediately shut down
459 /// without taking any further action such as persisting the current state.
461 /// If an implementation maintains multiple instances of a channel's monitor (e.g., by storing
462 /// backup copies), then it must ensure that updates are applied across all instances. Otherwise, it
463 /// could result in a revoked transaction being broadcast, allowing the counterparty to claim all
464 /// funds in the channel. See [`ChannelMonitorUpdateErr`] for more details about how to handle
465 /// multiple instances.
467 /// [`ChannelMonitor`]: channelmonitor::ChannelMonitor
468 /// [`ChannelMonitorUpdateErr`]: channelmonitor::ChannelMonitorUpdateErr
469 /// [`PermanentFailure`]: channelmonitor::ChannelMonitorUpdateErr::PermanentFailure
472 /// An opaque pointer which is passed to your function implementations as an argument.
473 /// This has no meaning in the LDK, and can be NULL or any other value.
474 pub this_arg: *mut c_void,
475 /// Watches a channel identified by `funding_txo` using `monitor`.
477 /// Implementations are responsible for watching the chain for the funding transaction along
478 /// with any spends of outputs returned by [`get_outputs_to_watch`]. In practice, this means
479 /// calling [`block_connected`] and [`block_disconnected`] on the monitor.
481 /// [`get_outputs_to_watch`]: channelmonitor::ChannelMonitor::get_outputs_to_watch
482 /// [`block_connected`]: channelmonitor::ChannelMonitor::block_connected
483 /// [`block_disconnected`]: channelmonitor::ChannelMonitor::block_disconnected
485 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,
486 /// Updates a channel identified by `funding_txo` by applying `update` to its monitor.
488 /// Implementations must call [`update_monitor`] with the given update. See
489 /// [`ChannelMonitorUpdateErr`] for invariants around returning an error.
491 /// [`update_monitor`]: channelmonitor::ChannelMonitor::update_monitor
492 /// [`ChannelMonitorUpdateErr`]: channelmonitor::ChannelMonitorUpdateErr
494 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,
495 /// Returns any monitor events since the last call. Subsequent calls must only return new
498 pub release_pending_monitor_events: extern "C" fn (this_arg: *const c_void) -> crate::c_types::derived::CVec_MonitorEventZ,
499 /// Frees any resources associated with this object given its this_arg pointer.
500 /// Does not need to free the outer struct containing function pointers and may be NULL is no resources need to be freed.
501 pub free: Option<extern "C" fn(this_arg: *mut c_void)>,
503 unsafe impl Send for Watch {}
504 unsafe impl Sync for Watch {}
506 pub(crate) extern "C" fn Watch_clone_fields(orig: &Watch) -> Watch {
508 this_arg: orig.this_arg,
509 watch_channel: Clone::clone(&orig.watch_channel),
510 update_channel: Clone::clone(&orig.update_channel),
511 release_pending_monitor_events: Clone::clone(&orig.release_pending_monitor_events),
512 free: Clone::clone(&orig.free),
516 use lightning::chain::Watch as rustWatch;
517 impl rustWatch<crate::lightning::chain::keysinterface::Sign> for Watch {
518 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> {
519 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 });
520 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() })};
523 fn update_channel(&self, mut funding_txo: lightning::chain::transaction::OutPoint, mut update: lightning::chain::channelmonitor::ChannelMonitorUpdate) -> Result<(), lightning::chain::channelmonitor::ChannelMonitorUpdateErr> {
524 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 });
525 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() })};
528 fn release_pending_monitor_events(&self) -> Vec<lightning::chain::channelmonitor::MonitorEvent> {
529 let mut ret = (self.release_pending_monitor_events)(self.this_arg);
530 let mut local_ret = Vec::new(); for mut item in ret.into_rust().drain(..) { local_ret.push( { item.into_native() }); };
535 // We're essentially a pointer already, or at least a set of pointers, so allow us to be used
536 // directly as a Deref trait in higher-level structs:
537 impl std::ops::Deref for Watch {
539 fn deref(&self) -> &Self {
543 /// Calls the free function if one is set
545 pub extern "C" fn Watch_free(this_ptr: Watch) { }
546 impl Drop for Watch {
548 if let Some(f) = self.free {
553 /// The `Filter` trait defines behavior for indicating chain activity of interest pertaining to
556 /// This is useful in order to have a [`Watch`] implementation convey to a chain source which
557 /// transactions to be notified of. Notification may take the form of pre-filtering blocks or, in
558 /// the case of [BIP 157]/[BIP 158], only fetching a block if the compact filter matches. If
559 /// receiving full blocks from a chain source, any further filtering is unnecessary.
561 /// After an output has been registered, subsequent block retrievals from the chain source must not
562 /// exclude any transactions matching the new criteria nor any in-block descendants of such
565 /// Note that use as part of a [`Watch`] implementation involves reentrancy. Therefore, the `Filter`
566 /// should not block on I/O. Implementations should instead queue the newly monitored data to be
567 /// processed later. Then, in order to block until the data has been processed, any [`Watch`]
568 /// invocation that has called the `Filter` must return [`TemporaryFailure`].
570 /// [`TemporaryFailure`]: channelmonitor::ChannelMonitorUpdateErr::TemporaryFailure
571 /// [BIP 157]: https://github.com/bitcoin/bips/blob/master/bip-0157.mediawiki
572 /// [BIP 158]: https://github.com/bitcoin/bips/blob/master/bip-0158.mediawiki
575 /// An opaque pointer which is passed to your function implementations as an argument.
576 /// This has no meaning in the LDK, and can be NULL or any other value.
577 pub this_arg: *mut c_void,
578 /// Registers interest in a transaction with `txid` and having an output with `script_pubkey` as
579 /// a spending condition.
580 pub register_tx: extern "C" fn (this_arg: *const c_void, txid: *const [u8; 32], script_pubkey: crate::c_types::u8slice),
581 /// Registers interest in spends of a transaction output.
583 /// Optionally, when `output.block_hash` is set, should return any transaction spending the
584 /// output that is found in the corresponding block along with its index.
586 /// This return value is useful for Electrum clients in order to supply in-block descendant
587 /// transactions which otherwise were not included. This is not necessary for other clients if
588 /// such descendant transactions were already included (e.g., when a BIP 157 client provides the
591 pub register_output: extern "C" fn (this_arg: *const c_void, output: crate::lightning::chain::WatchedOutput) -> crate::c_types::derived::COption_C2Tuple_usizeTransactionZZ,
592 /// Frees any resources associated with this object given its this_arg pointer.
593 /// Does not need to free the outer struct containing function pointers and may be NULL is no resources need to be freed.
594 pub free: Option<extern "C" fn(this_arg: *mut c_void)>,
596 unsafe impl Send for Filter {}
597 unsafe impl Sync for Filter {}
599 pub(crate) extern "C" fn Filter_clone_fields(orig: &Filter) -> Filter {
601 this_arg: orig.this_arg,
602 register_tx: Clone::clone(&orig.register_tx),
603 register_output: Clone::clone(&orig.register_output),
604 free: Clone::clone(&orig.free),
608 use lightning::chain::Filter as rustFilter;
609 impl rustFilter for Filter {
610 fn register_tx(&self, mut txid: &bitcoin::hash_types::Txid, mut script_pubkey: &bitcoin::blockdata::script::Script) {
611 (self.register_tx)(self.this_arg, txid.as_inner(), crate::c_types::u8slice::from_slice(&script_pubkey[..]))
613 fn register_output(&self, mut output: lightning::chain::WatchedOutput) -> Option<(usize, bitcoin::blockdata::transaction::Transaction)> {
614 let mut ret = (self.register_output)(self.this_arg, crate::lightning::chain::WatchedOutput { inner: ObjOps::heap_alloc(output), is_owned: true });
615 let mut local_ret = if ret.is_some() { Some( { let (mut orig_ret_0_0, mut orig_ret_0_1) = ret.take().to_rust(); let mut local_ret_0 = (orig_ret_0_0, orig_ret_0_1.into_bitcoin()); local_ret_0 }) } else { None };
620 // We're essentially a pointer already, or at least a set of pointers, so allow us to be used
621 // directly as a Deref trait in higher-level structs:
622 impl std::ops::Deref for Filter {
624 fn deref(&self) -> &Self {
628 /// Calls the free function if one is set
630 pub extern "C" fn Filter_free(this_ptr: Filter) { }
631 impl Drop for Filter {
633 if let Some(f) = self.free {
639 use lightning::chain::WatchedOutput as nativeWatchedOutputImport;
640 type nativeWatchedOutput = nativeWatchedOutputImport;
642 /// A transaction output watched by a [`ChannelMonitor`] for spends on-chain.
644 /// Used to convey to a [`Filter`] such an output with a given spending condition. Any transaction
645 /// spending the output must be given to [`ChannelMonitor::block_connected`] either directly or via
646 /// the return value of [`Filter::register_output`].
648 /// If `block_hash` is `Some`, this indicates the output was created in the corresponding block and
649 /// may have been spent there. See [`Filter::register_output`] for details.
651 /// [`ChannelMonitor`]: channelmonitor::ChannelMonitor
652 /// [`ChannelMonitor::block_connected`]: channelmonitor::ChannelMonitor::block_connected
655 pub struct WatchedOutput {
656 /// A pointer to the opaque Rust object.
658 /// Nearly everywhere, inner must be non-null, however in places where
659 /// the Rust equivalent takes an Option, it may be set to null to indicate None.
660 pub inner: *mut nativeWatchedOutput,
661 /// Indicates that this is the only struct which contains the same pointer.
663 /// Rust functions which take ownership of an object provided via an argument require
664 /// this to be true and invalidate the object pointed to by inner.
668 impl Drop for WatchedOutput {
670 if self.is_owned && !<*mut nativeWatchedOutput>::is_null(self.inner) {
671 let _ = unsafe { Box::from_raw(ObjOps::untweak_ptr(self.inner)) };
675 /// Frees any resources used by the WatchedOutput, if is_owned is set and inner is non-NULL.
677 pub extern "C" fn WatchedOutput_free(this_obj: WatchedOutput) { }
679 /// Used only if an object of this type is returned as a trait impl by a method
680 extern "C" fn WatchedOutput_free_void(this_ptr: *mut c_void) {
681 unsafe { let _ = Box::from_raw(this_ptr as *mut nativeWatchedOutput); }
685 pub(crate) fn get_native_ref(&self) -> &'static nativeWatchedOutput {
686 unsafe { &*ObjOps::untweak_ptr(self.inner) }
688 pub(crate) fn get_native_mut_ref(&self) -> &'static mut nativeWatchedOutput {
689 unsafe { &mut *ObjOps::untweak_ptr(self.inner) }
691 /// When moving out of the pointer, we have to ensure we aren't a reference, this makes that easy
692 pub(crate) fn take_inner(mut self) -> *mut nativeWatchedOutput {
693 assert!(self.is_owned);
694 let ret = ObjOps::untweak_ptr(self.inner);
695 self.inner = std::ptr::null_mut();
699 /// First block where the transaction output may have been spent.
701 /// Note that the return value (or a relevant inner pointer) may be NULL or all-0s to represent None
703 pub extern "C" fn WatchedOutput_get_block_hash(this_ptr: &WatchedOutput) -> crate::c_types::ThirtyTwoBytes {
704 let mut inner_val = &mut this_ptr.get_native_mut_ref().block_hash;
705 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() } } };
708 /// First block where the transaction output may have been spent.
710 /// Note that val (or a relevant inner pointer) may be NULL or all-0s to represent None
712 pub extern "C" fn WatchedOutput_set_block_hash(this_ptr: &mut WatchedOutput, mut val: crate::c_types::ThirtyTwoBytes) {
713 let mut local_val = if val.data == [0; 32] { None } else { Some( { ::bitcoin::hash_types::BlockHash::from_slice(&val.data[..]).unwrap() }) };
714 unsafe { &mut *ObjOps::untweak_ptr(this_ptr.inner) }.block_hash = local_val;
716 /// Outpoint identifying the transaction output.
718 pub extern "C" fn WatchedOutput_get_outpoint(this_ptr: &WatchedOutput) -> crate::lightning::chain::transaction::OutPoint {
719 let mut inner_val = &mut this_ptr.get_native_mut_ref().outpoint;
720 crate::lightning::chain::transaction::OutPoint { inner: unsafe { ObjOps::nonnull_ptr_to_inner((inner_val as *const _) as *mut _) }, is_owned: false }
722 /// Outpoint identifying the transaction output.
724 pub extern "C" fn WatchedOutput_set_outpoint(this_ptr: &mut WatchedOutput, mut val: crate::lightning::chain::transaction::OutPoint) {
725 unsafe { &mut *ObjOps::untweak_ptr(this_ptr.inner) }.outpoint = *unsafe { Box::from_raw(val.take_inner()) };
727 /// Spending condition of the transaction output.
729 pub extern "C" fn WatchedOutput_get_script_pubkey(this_ptr: &WatchedOutput) -> crate::c_types::u8slice {
730 let mut inner_val = &mut this_ptr.get_native_mut_ref().script_pubkey;
731 crate::c_types::u8slice::from_slice(&inner_val[..])
733 /// Spending condition of the transaction output.
735 pub extern "C" fn WatchedOutput_set_script_pubkey(this_ptr: &mut WatchedOutput, mut val: crate::c_types::derived::CVec_u8Z) {
736 unsafe { &mut *ObjOps::untweak_ptr(this_ptr.inner) }.script_pubkey = ::bitcoin::blockdata::script::Script::from(val.into_rust());
738 /// Constructs a new WatchedOutput given each field
741 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 {
742 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() }) };
743 WatchedOutput { inner: ObjOps::heap_alloc(nativeWatchedOutput {
744 block_hash: local_block_hash_arg,
745 outpoint: *unsafe { Box::from_raw(outpoint_arg.take_inner()) },
746 script_pubkey: ::bitcoin::blockdata::script::Script::from(script_pubkey_arg.into_rust()),
749 impl Clone for WatchedOutput {
750 fn clone(&self) -> Self {
752 inner: if <*mut nativeWatchedOutput>::is_null(self.inner) { std::ptr::null_mut() } else {
753 ObjOps::heap_alloc(unsafe { &*ObjOps::untweak_ptr(self.inner) }.clone()) },
759 /// Used only if an object of this type is returned as a trait impl by a method
760 pub(crate) extern "C" fn WatchedOutput_clone_void(this_ptr: *const c_void) -> *mut c_void {
761 Box::into_raw(Box::new(unsafe { (*(this_ptr as *mut nativeWatchedOutput)).clone() })) as *mut c_void
764 /// Creates a copy of the WatchedOutput
765 pub extern "C" fn WatchedOutput_clone(orig: &WatchedOutput) -> WatchedOutput {
768 /// Checks if two WatchedOutputs contain equal inner contents.
770 pub extern "C" fn WatchedOutput_hash(o: &WatchedOutput) -> u64 {
771 if o.inner.is_null() { return 0; }
772 // Note that we'd love to use std::collections::hash_map::DefaultHasher but it's not in core
774 let mut hasher = core::hash::SipHasher::new();
775 std::hash::Hash::hash(o.get_native_ref(), &mut hasher);
776 std::hash::Hasher::finish(&hasher)