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[ldk-c-bindings] / lightning-c-bindings / src / lightning / chain / mod.rs

// This file is Copyright its original authors, visible in version control
// history and in the source files from which this was generated.
//
// This file is licensed under the license available in the LICENSE or LICENSE.md
// file in the root of this repository or, if no such file exists, the same
// license as that which applies to the original source files from which this
// source was automatically generated.

//! Structs and traits which allow other parts of rust-lightning to interact with the blockchain.

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 channelmonitor;
pub mod transaction;
pub mod keysinterface;
mod onchaintx {

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 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;
pub(crate) type nativeBestBlock = nativeBestBlockImport;

/// The best known block as identified by its hash and height.
#[must_use]
#[repr(C)]
pub struct BestBlock {
        /// A pointer to the opaque Rust object.

        /// Nearly everywhere, inner must be non-null, however in places where
        /// the Rust equivalent takes an Option, it may be set to null to indicate None.
        pub inner: *mut nativeBestBlock,
        /// Indicates that this is the only struct which contains the same pointer.

        /// Rust functions which take ownership of an object provided via an argument require
        /// this to be true and invalidate the object pointed to by inner.
        pub is_owned: bool,
}

impl Drop for BestBlock {
        fn drop(&mut self) {
                if self.is_owned && !<*mut nativeBestBlock>::is_null(self.inner) {
                        let _ = unsafe { Box::from_raw(ObjOps::untweak_ptr(self.inner)) };
                }
        }
}
/// Frees any resources used by the BestBlock, if is_owned is set and inner is non-NULL.
#[no_mangle]
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
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)]
impl BestBlock {
        pub(crate) fn get_native_ref(&self) -> &'static nativeBestBlock {
                unsafe { &*ObjOps::untweak_ptr(self.inner) }
        }
        pub(crate) fn get_native_mut_ref(&self) -> &'static mut nativeBestBlock {
                unsafe { &mut *ObjOps::untweak_ptr(self.inner) }
        }
        /// When moving out of the pointer, we have to ensure we aren't a reference, this makes that easy
        pub(crate) fn take_inner(mut self) -> *mut nativeBestBlock {
                assert!(self.is_owned);
                let ret = ObjOps::untweak_ptr(self.inner);
                self.inner = core::ptr::null_mut();
                ret
        }
}
impl Clone for BestBlock {
        fn clone(&self) -> Self {
                Self {
                        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,
                }
        }
}
#[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
}
#[no_mangle]
/// Creates a copy of the BestBlock
pub extern "C" fn BestBlock_clone(orig: &BestBlock) -> BestBlock {
        orig.clone()
}
/// Constructs a `BestBlock` that represents the genesis block at height 0 of the given
/// network.
#[must_use]
#[no_mangle]
pub extern "C" fn BestBlock_from_genesis(mut network: crate::bitcoin::network::Network) -> BestBlock {
        let mut ret = lightning::chain::BestBlock::from_genesis(network.into_bitcoin());
        BestBlock { inner: ObjOps::heap_alloc(ret), is_owned: true }
}

/// Returns a `BestBlock` as identified by the given block hash and height.
#[must_use]
#[no_mangle]
pub extern "C" fn BestBlock_new(mut block_hash: crate::c_types::ThirtyTwoBytes, mut height: u32) -> BestBlock {
        let mut ret = lightning::chain::BestBlock::new(::bitcoin::hash_types::BlockHash::from_slice(&block_hash.data[..]).unwrap(), height);
        BestBlock { inner: ObjOps::heap_alloc(ret), is_owned: true }
}

/// Returns the best block hash.
#[must_use]
#[no_mangle]
pub extern "C" fn BestBlock_block_hash(this_arg: &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() }
}

/// Returns the best block height.
#[must_use]
#[no_mangle]
pub extern "C" fn BestBlock_height(this_arg: &BestBlock) -> u32 {
        let mut ret = unsafe { &*ObjOps::untweak_ptr(this_arg.inner) }.height();
        ret
}

/// An error when accessing the chain via [`Access`].
#[must_use]
#[derive(Clone)]
#[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 nativeAccessError;
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/lightningnetwork/lightning-rfc/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.
///
/// Useful when needing to replay chain data upon startup or as new chain events occur. Clients
/// sourcing chain data using a block-oriented API should prefer this interface over [`Confirm`].
/// Such clients fetch the entire header chain whereas clients using [`Confirm`] only fetch headers
/// when needed.
#[repr(C)]
pub struct Listen {
        /// 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,
        /// Notifies the listener that a block was added at the given height.
        pub block_connected: extern "C" fn (this_arg: *const c_void, block: crate::c_types::u8slice, height: u32),
        /// Notifies the listener that a block was removed at the given height.
        pub block_disconnected: extern "C" fn (this_arg: *const c_void, header: *const [u8; 80], height: u32),
        /// 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 Listen {}
unsafe impl Sync for Listen {}
#[no_mangle]
pub(crate) extern "C" fn Listen_clone_fields(orig: &Listen) -> Listen {
        Listen {
                this_arg: orig.this_arg,
                block_connected: Clone::clone(&orig.block_connected),
                block_disconnected: Clone::clone(&orig.block_disconnected),
                free: Clone::clone(&orig.free),
        }
}

use lightning::chain::Listen as rustListen;
impl rustListen for Listen {
        fn block_connected(&self, mut block: &bitcoin::blockdata::block::Block, mut height: u32) {
                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) {
                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)
        }
}

// 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 Listen {
        type Target = Self;
        fn deref(&self) -> &Self {
                self
        }
}
/// Calls the free function if one is set
#[no_mangle]
pub extern "C" fn Listen_free(this_ptr: Listen) { }
impl Drop for Listen {
        fn drop(&mut self) {
                if let Some(f) = self.free {
                        f(self.this_arg);
                }
        }
}
/// The `Confirm` trait is used to notify when 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.
///
/// # 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.
///
/// # 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.
/// - 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.
///
/// See individual method documentation for further details.
///
/// [`transactions_confirmed`]: Self::transactions_confirmed
/// [`transaction_unconfirmed`]: Self::transaction_unconfirmed
/// [`best_block_updated`]: Self::best_block_updated
/// [`get_relevant_txids`]: Self::get_relevant_txids
#[repr(C)]
pub struct Confirm {
        /// 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.
        ///
        /// Should 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].
        ///
        /// May be called before or after [`best_block_updated`] for the corresponding block. However,
        /// in the event of a chain reorganization, it must not be called with a `header` that is no
        /// longer in the chain as of the last call to [`best_block_updated`].
        ///
        /// [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.
        ///
        /// 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 should 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.
        ///
        /// Should be called when a new header is available but may be skipped for intermediary blocks
        /// if they become available at the same time.
        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.
        ///
        /// Should include any transactions passed to [`transactions_confirmed`] that have insufficient
        /// confirmations to be safe from a chain reorganization. Should 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
        /// 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
        /// given to [`transaction_unconfirmed`].
        ///
        /// [`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,
        /// 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 {
        Confirm {
                this_arg: orig.this_arg,
                transactions_confirmed: Clone::clone(&orig.transactions_confirmed),
                transaction_unconfirmed: Clone::clone(&orig.transaction_unconfirmed),
                best_block_updated: Clone::clone(&orig.best_block_updated),
                get_relevant_txids: Clone::clone(&orig.get_relevant_txids),
                free: Clone::clone(&orig.free),
        }
}

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) {
                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())
        }
        fn best_block_updated(&self, mut header: &bitcoin::blockdata::block::BlockHeader, 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> {
                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() }); };
                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 Confirm {
        type Target = Self;
        fn deref(&self) -> &Self {
                self
        }
}
/// Calls the free function if one is set
#[no_mangle]
pub extern "C" fn Confirm_free(this_ptr: Confirm) { }
impl Drop for Confirm {
        fn drop(&mut self) {
                if let Some(f) = self.free {
                        f(self.this_arg);
                }
        }
}
/// 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.
///
/// 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.
///
/// If an implementation maintains multiple instances of a channel's monitor (e.g., by storing
/// backup copies), then it must ensure that updates are applied across all instances. Otherwise, it
/// could result in a revoked transaction being broadcast, allowing the counterparty to claim all
/// funds in the channel. See [`ChannelMonitorUpdateErr`] for more details about how to handle
/// multiple instances.
///
/// [`PermanentFailure`]: ChannelMonitorUpdateErr::PermanentFailure
#[repr(C)]
pub struct Watch {
        /// 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,
        /// Watches a channel identified by `funding_txo` using `monitor`.
        ///
        /// Implementations are responsible for watching the chain for the funding transaction along
        /// 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
        #[must_use]
        pub watch_channel: extern "C" fn (this_arg: *const c_void, funding_txo: crate::lightning::chain::transaction::OutPoint, monitor: crate::lightning::chain::channelmonitor::ChannelMonitor) -> crate::c_types::derived::CResult_NoneChannelMonitorUpdateErrZ,
        /// Updates a channel identified by `funding_txo` by applying `update` to its monitor.
        ///
        /// Implementations must call [`update_monitor`] with the given update. See
        /// [`ChannelMonitorUpdateErr`] for invariants around returning an error.
        ///
        /// [`update_monitor`]: channelmonitor::ChannelMonitor::update_monitor
        #[must_use]
        pub update_channel: extern "C" fn (this_arg: *const c_void, funding_txo: crate::lightning::chain::transaction::OutPoint, update: crate::lightning::chain::channelmonitor::ChannelMonitorUpdate) -> crate::c_types::derived::CResult_NoneChannelMonitorUpdateErrZ,
        /// 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.
        /// 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 Watch {}
unsafe impl Sync for Watch {}
#[no_mangle]
pub(crate) extern "C" fn Watch_clone_fields(orig: &Watch) -> Watch {
        Watch {
                this_arg: orig.this_arg,
                watch_channel: Clone::clone(&orig.watch_channel),
                update_channel: Clone::clone(&orig.update_channel),
                release_pending_monitor_events: Clone::clone(&orig.release_pending_monitor_events),
                free: Clone::clone(&orig.free),
        }
}

use lightning::chain::Watch as rustWatch;
impl rustWatch<crate::lightning::chain::keysinterface::Sign> for Watch {
        fn watch_channel(&self, mut funding_txo: lightning::chain::transaction::OutPoint, mut monitor: lightning::chain::channelmonitor::ChannelMonitor<crate::lightning::chain::keysinterface::Sign>) -> Result<(), lightning::chain::ChannelMonitorUpdateErr> {
                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::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
        }
        fn release_pending_monitor_events(&self) -> Vec<lightning::chain::channelmonitor::MonitorEvent> {
                let mut ret = (self.release_pending_monitor_events)(self.this_arg);
                let mut local_ret = Vec::new(); for mut item in ret.into_rust().drain(..) { local_ret.push( { item.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 Watch {
        type Target = Self;
        fn deref(&self) -> &Self {
                self
        }
}
/// Calls the free function if one is set
#[no_mangle]
pub extern "C" fn Watch_free(this_ptr: Watch) { }
impl Drop for Watch {
        fn drop(&mut self) {
                if let Some(f) = self.free {
                        f(self.this_arg);
                }
        }
}
/// The `Filter` trait defines behavior for indicating chain activity of interest pertaining to
/// channels.
///
/// This is useful in order to have a [`Watch`] implementation convey to a chain source which
/// transactions to be notified of. Notification may take the form of pre-filtering blocks or, in
/// the case of [BIP 157]/[BIP 158], only fetching a block if the compact filter matches. If
/// receiving full blocks from a chain source, any further filtering is unnecessary.
///
/// After an output has been registered, subsequent block retrievals from the chain source must not
/// exclude any transactions matching the new criteria nor any in-block descendants of such
/// transactions.
///
/// Note that use as part of a [`Watch`] implementation involves reentrancy. Therefore, the `Filter`
/// should not block on I/O. Implementations should instead queue the newly monitored data to be
/// processed later. Then, in order to block until the data has been processed, any [`Watch`]
/// invocation that has called the `Filter` must return [`TemporaryFailure`].
///
/// [`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)]
pub struct Filter {
        /// 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,
        /// Registers interest in a transaction with `txid` and having an output with `script_pubkey` as
        /// a spending condition.
        pub register_tx: extern "C" fn (this_arg: *const c_void, txid: *const [u8; 32], script_pubkey: crate::c_types::u8slice),
        /// Registers interest in spends of a transaction output.
        ///
        /// Optionally, when `output.block_hash` is set, should return any transaction spending the
        /// output that is found in the corresponding block along with its index.
        ///
        /// This return value is useful for Electrum clients in order to supply in-block descendant
        /// transactions which otherwise were not included. This is not necessary for other clients if
        /// such descendant transactions were already included (e.g., when a BIP 157 client provides the
        /// full block).
        #[must_use]
        pub register_output: extern "C" fn (this_arg: *const c_void, output: crate::lightning::chain::WatchedOutput) -> crate::c_types::derived::COption_C2Tuple_usizeTransactionZZ,
        /// 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 Filter {}
unsafe impl Sync for Filter {}
#[no_mangle]
pub(crate) extern "C" fn Filter_clone_fields(orig: &Filter) -> Filter {
        Filter {
                this_arg: orig.this_arg,
                register_tx: Clone::clone(&orig.register_tx),
                register_output: Clone::clone(&orig.register_output),
                free: Clone::clone(&orig.free),
        }
}

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[..]))
        }
        fn register_output(&self, mut output: lightning::chain::WatchedOutput) -> Option<(usize, bitcoin::blockdata::transaction::Transaction)> {
                let mut ret = (self.register_output)(self.this_arg, crate::lightning::chain::WatchedOutput { inner: ObjOps::heap_alloc(output), is_owned: true });
                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 };
                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 Filter {
        type Target = Self;
        fn deref(&self) -> &Self {
                self
        }
}
/// Calls the free function if one is set
#[no_mangle]
pub extern "C" fn Filter_free(this_ptr: Filter) { }
impl Drop for Filter {
        fn drop(&mut self) {
                if let Some(f) = self.free {
                        f(self.this_arg);
                }
        }
}

use lightning::chain::WatchedOutput as nativeWatchedOutputImport;
pub(crate) type nativeWatchedOutput = nativeWatchedOutputImport;

/// A transaction output watched by a [`ChannelMonitor`] for spends on-chain.
///
/// Used to convey to a [`Filter`] such an output with a given spending condition. Any transaction
/// spending the output must be given to [`ChannelMonitor::block_connected`] either directly or via
/// the return value of [`Filter::register_output`].
///
/// If `block_hash` is `Some`, this indicates the output was created in the corresponding block and
/// may have been spent there. See [`Filter::register_output`] for details.
///
/// [`ChannelMonitor`]: channelmonitor::ChannelMonitor
/// [`ChannelMonitor::block_connected`]: channelmonitor::ChannelMonitor::block_connected
#[must_use]
#[repr(C)]
pub struct WatchedOutput {
        /// A pointer to the opaque Rust object.

        /// Nearly everywhere, inner must be non-null, however in places where
        /// the Rust equivalent takes an Option, it may be set to null to indicate None.
        pub inner: *mut nativeWatchedOutput,
        /// Indicates that this is the only struct which contains the same pointer.

        /// Rust functions which take ownership of an object provided via an argument require
        /// this to be true and invalidate the object pointed to by inner.
        pub is_owned: bool,
}

impl Drop for WatchedOutput {
        fn drop(&mut self) {
                if self.is_owned && !<*mut nativeWatchedOutput>::is_null(self.inner) {
                        let _ = unsafe { Box::from_raw(ObjOps::untweak_ptr(self.inner)) };
                }
        }
}
/// Frees any resources used by the WatchedOutput, if is_owned is set and inner is non-NULL.
#[no_mangle]
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
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)]
impl WatchedOutput {
        pub(crate) fn get_native_ref(&self) -> &'static nativeWatchedOutput {
                unsafe { &*ObjOps::untweak_ptr(self.inner) }
        }
        pub(crate) fn get_native_mut_ref(&self) -> &'static mut nativeWatchedOutput {
                unsafe { &mut *ObjOps::untweak_ptr(self.inner) }
        }
        /// When moving out of the pointer, we have to ensure we aren't a reference, this makes that easy
        pub(crate) fn take_inner(mut self) -> *mut nativeWatchedOutput {
                assert!(self.is_owned);
                let ret = ObjOps::untweak_ptr(self.inner);
                self.inner = core::ptr::null_mut();
                ret
        }
}
/// 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 {
        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() } } };
        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() }) };
        unsafe { &mut *ObjOps::untweak_ptr(this_ptr.inner) }.block_hash = local_val;
}
/// Outpoint identifying the transaction output.
#[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 lightning::chain::transaction::OutPoint<>) as *mut _) }, is_owned: false }
}
/// Outpoint identifying the transaction output.
#[no_mangle]
pub extern "C" fn WatchedOutput_set_outpoint(this_ptr: &mut WatchedOutput, mut val: crate::lightning::chain::transaction::OutPoint) {
        unsafe { &mut *ObjOps::untweak_ptr(this_ptr.inner) }.outpoint = *unsafe { Box::from_raw(val.take_inner()) };
}
/// Spending condition of the transaction output.
#[no_mangle]
pub extern "C" fn WatchedOutput_get_script_pubkey(this_ptr: &WatchedOutput) -> crate::c_types::u8slice {
        let mut inner_val = &mut this_ptr.get_native_mut_ref().script_pubkey;
        crate::c_types::u8slice::from_slice(&inner_val[..])
}
/// 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());
}
/// 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() }) };
        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()),
        }), is_owned: true }
}
impl Clone for WatchedOutput {
        fn clone(&self) -> Self {
                Self {
                        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,
                }
        }
}
#[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
}
#[no_mangle]
/// Creates a copy of the WatchedOutput
pub extern "C" fn WatchedOutput_clone(orig: &WatchedOutput) -> WatchedOutput {
        orig.clone()
}
/// Checks if two WatchedOutputs contain equal inner contents.
#[no_mangle]
pub extern "C" fn WatchedOutput_hash(o: &WatchedOutput) -> u64 {
        if o.inner.is_null() { return 0; }
        // 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();
        core::hash::Hash::hash(o.get_native_ref(), &mut hasher);
        core::hash::Hasher::finish(&hasher)
}