X-Git-Url: http://git.bitcoin.ninja/index.cgi?p=ldk-c-bindings;a=blobdiff_plain;f=lightning-c-bindings%2Fsrc%2Flightning%2Fchain%2Fmod.rs;h=7db473226e706d9756b77edb55daf523e3296b03;hp=adc5984d63685d6ea957da79113d1a5cdb48addf;hb=2f0c348c6fe505a736c3d015df6d6cd30032c912;hpb=1ea51d14faf91619495778e82bca2e6fad0ae1ae diff --git a/lightning-c-bindings/src/lightning/chain/mod.rs b/lightning-c-bindings/src/lightning/chain/mod.rs index adc5984..7db4732 100644 --- a/lightning-c-bindings/src/lightning/chain/mod.rs +++ b/lightning-c-bindings/src/lightning/chain/mod.rs @@ -8,6 +8,7 @@ //! Structs and traits which allow other parts of rust-lightning to interact with the blockchain. +use std::str::FromStr; use std::ffi::c_void; use bitcoin::hashes::Hash; use crate::c_types::*; @@ -17,6 +18,119 @@ pub mod chainmonitor; pub mod channelmonitor; pub mod transaction; pub mod keysinterface; +mod onchaintx { + +use std::str::FromStr; +use std::ffi::c_void; +use bitcoin::hashes::Hash; +use crate::c_types::*; + +} +mod package { + +use std::str::FromStr; +use std::ffi::c_void; +use bitcoin::hashes::Hash; +use crate::c_types::*; + +} + +use lightning::chain::BestBlock as nativeBestBlockImport; +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(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 +extern "C" fn BestBlock_free_void(this_ptr: *mut c_void) { + unsafe { let _ = Box::from_raw(this_ptr as *mut nativeBestBlock); } +} +#[allow(unused)] +/// When moving out of the pointer, we have to ensure we aren't a reference, this makes that easy +impl BestBlock { + pub(crate) fn take_inner(mut self) -> *mut nativeBestBlock { + assert!(self.is_owned); + let ret = self.inner; + self.inner = std::ptr::null_mut(); + ret + } +} +impl Clone for BestBlock { + fn clone(&self) -> Self { + Self { + inner: if <*mut nativeBestBlock>::is_null(self.inner) { std::ptr::null_mut() } else { + Box::into_raw(Box::new(unsafe { &*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: Box::into_raw(Box::new(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: Box::into_raw(Box::new(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 { &*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 { &*this_arg.inner }.height(); + ret +} + /// An error when accessing the chain via [`Access`]. #[must_use] #[derive(Clone)] @@ -63,6 +177,14 @@ impl AccessError { 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)] @@ -83,10 +205,18 @@ pub struct Access { } 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, genesis_hash: &bitcoin::hash_types::BlockHash, short_channel_id: u64) -> Result { + fn get_utxo(&self, mut genesis_hash: &bitcoin::hash_types::BlockHash, mut short_channel_id: u64) -> Result { 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 @@ -111,10 +241,13 @@ impl Drop for Access { } } } -/// The `Listen` trait is used to be notified of when blocks have been connected or disconnected -/// from the chain. +/// 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. +/// 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. @@ -128,14 +261,25 @@ pub struct Listen { /// 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, } +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, block: &bitcoin::blockdata::block::Block, height: u32) { + 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, header: &bitcoin::blockdata::block::BlockHeader, height: u32) { + 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) } @@ -159,6 +303,143 @@ impl Drop for Listen { } } } +/// 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, +} +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 { + 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 std::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); + } + } +} /// The `Watch` trait defines behavior for watching on-chain activity pertaining to channels as /// blocks are connected and disconnected. /// @@ -215,15 +496,25 @@ pub struct Watch { } 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 for Watch { - fn watch_channel(&self, funding_txo: lightning::chain::transaction::OutPoint, monitor: lightning::chain::channelmonitor::ChannelMonitor) -> Result<(), lightning::chain::channelmonitor::ChannelMonitorUpdateErr> { + fn watch_channel(&self, mut funding_txo: lightning::chain::transaction::OutPoint, mut monitor: lightning::chain::channelmonitor::ChannelMonitor) -> Result<(), lightning::chain::channelmonitor::ChannelMonitorUpdateErr> { let mut ret = (self.watch_channel)(self.this_arg, crate::lightning::chain::transaction::OutPoint { inner: Box::into_raw(Box::new(funding_txo)), is_owned: true }, crate::lightning::chain::channelmonitor::ChannelMonitor { inner: Box::into_raw(Box::new(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, funding_txo: lightning::chain::transaction::OutPoint, update: lightning::chain::channelmonitor::ChannelMonitorUpdate) -> Result<(), lightning::chain::channelmonitor::ChannelMonitorUpdateErr> { + fn update_channel(&self, mut funding_txo: lightning::chain::transaction::OutPoint, mut update: lightning::chain::channelmonitor::ChannelMonitorUpdate) -> Result<(), lightning::chain::channelmonitor::ChannelMonitorUpdateErr> { let mut ret = (self.update_channel)(self.this_arg, crate::lightning::chain::transaction::OutPoint { inner: Box::into_raw(Box::new(funding_txo)), is_owned: true }, crate::lightning::chain::channelmonitor::ChannelMonitorUpdate { inner: Box::into_raw(Box::new(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 @@ -298,13 +589,22 @@ pub struct Filter { } 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, txid: &bitcoin::hash_types::Txid, script_pubkey: &bitcoin::blockdata::script::Script) { + 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, output: lightning::chain::WatchedOutput) -> Option<(usize, bitcoin::blockdata::transaction::Transaction)> { + 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: Box::into_raw(Box::new(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 @@ -385,6 +685,8 @@ 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 { let mut inner_val = &mut unsafe { &mut *this_ptr.inner }.block_hash; @@ -392,6 +694,8 @@ pub extern "C" fn WatchedOutput_get_block_hash(this_ptr: &WatchedOutput) -> crat 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() }) }; @@ -401,7 +705,7 @@ pub extern "C" fn WatchedOutput_set_block_hash(this_ptr: &mut WatchedOutput, mut #[no_mangle] pub extern "C" fn WatchedOutput_get_outpoint(this_ptr: &WatchedOutput) -> crate::lightning::chain::transaction::OutPoint { let mut inner_val = &mut unsafe { &mut *this_ptr.inner }.outpoint; - crate::lightning::chain::transaction::OutPoint { inner: unsafe { ( (&((*inner_val)) as *const _) as *mut _) }, is_owned: false } + crate::lightning::chain::transaction::OutPoint { inner: unsafe { ( (&(*inner_val) as *const _) as *mut _) }, is_owned: false } } /// Outpoint identifying the transaction output. #[no_mangle] @@ -412,7 +716,7 @@ pub extern "C" fn WatchedOutput_set_outpoint(this_ptr: &mut WatchedOutput, mut v #[no_mangle] pub extern "C" fn WatchedOutput_get_script_pubkey(this_ptr: &WatchedOutput) -> crate::c_types::u8slice { let mut inner_val = &mut unsafe { &mut *this_ptr.inner }.script_pubkey; - crate::c_types::u8slice::from_slice(&(*inner_val)[..]) + crate::c_types::u8slice::from_slice(&inner_val[..]) } /// Spending condition of the transaction output. #[no_mangle] @@ -430,3 +734,32 @@ pub extern "C" fn WatchedOutput_new(mut block_hash_arg: crate::c_types::ThirtyTw 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) { std::ptr::null_mut() } else { + Box::into_raw(Box::new(unsafe { &*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 std::collections::hash_map::DefaultHasher but it's not in core + #[allow(deprecated)] + let mut hasher = core::hash::SipHasher::new(); + std::hash::Hash::hash(unsafe { &*o.inner }, &mut hasher); + std::hash::Hasher::finish(&hasher) +}