Make confirmables Deref

.. the bindings branch needed a small patch as it doesn't support `dyn`
traits. Here, we opt to use `Deref` in the hopes this works with
bindings, rendering the patch unnecessary.

Author: tnull

lightning-transaction-sync/src/common.rs

@@ -4,6 +4,7 @@ use bitcoin::{Txid, BlockHash, Transaction, OutPoint};
 use bitcoin::block::Header;
 
 use std::collections::{HashSet, HashMap};
+use std::ops::Deref;
 
 
 // Represents the current state.
@@ -33,10 +34,12 @@ impl SyncState {
 			pending_sync: false,
 		}
 	}
-	pub fn sync_unconfirmed_transactions(
-		&mut self, confirmables: &Vec<&(dyn Confirm + Sync + Send)>,
+	pub fn sync_unconfirmed_transactions<C: Deref>(
+		&mut self, confirmables: &Vec<C>,
 		unconfirmed_txs: Vec<Txid>,
-	) {
+	)
+		where C::Target: Confirm,
+	{
 		for txid in unconfirmed_txs {
 			for c in confirmables {
 				c.transaction_unconfirmed(&txid);
@@ -57,10 +60,12 @@ impl SyncState {
 		}
 	}
 
-	pub fn sync_confirmed_transactions(
-		&mut self, confirmables: &Vec<&(dyn Confirm + Sync + Send)>,
+	pub fn sync_confirmed_transactions<C: Deref>(
+		&mut self, confirmables: &Vec<C>,
 		confirmed_txs: Vec<ConfirmedTx>
-	) {
+	)
+		where C::Target: Confirm,
+	{
 		for ctx in confirmed_txs {
 			for c in confirmables {
 				c.transactions_confirmed(

lightning-transaction-sync/src/electrum.rs

@@ -83,7 +83,9 @@ where
 	/// [`ChainMonitor`]: lightning::chain::chainmonitor::ChainMonitor
 	/// [`ChannelManager`]: lightning::ln::channelmanager::ChannelManager
 	/// [`Filter`]: lightning::chain::Filter
-	pub fn sync(&self, confirmables: Vec<&(dyn Confirm + Sync + Send)>) -> Result<(), TxSyncError> {
+	pub fn sync<C: Deref>(&self, confirmables: Vec<C>) -> Result<(), TxSyncError>
+		where C::Target: Confirm
+	{
 		// This lock makes sure we're syncing once at a time.
 		let mut sync_state = self.sync_state.lock().unwrap();
 
@@ -378,9 +380,11 @@ where
 		Ok(confirmed_txs)
 	}
 
-	fn get_unconfirmed_transactions(
-		&self, confirmables: &Vec<&(dyn Confirm + Sync + Send)>,
-	) -> Result<Vec<Txid>, InternalError> {
+	fn get_unconfirmed_transactions<C: Deref>(
+		&self, confirmables: &Vec<C>,
+	) -> Result<Vec<Txid>, InternalError>
+		where C::Target: Confirm
+	{
 		// Query the interface for relevant txids and check whether the relevant blocks are still
 		// in the best chain, mark them unconfirmed otherwise
 		let relevant_txids = confirmables

lightning-transaction-sync/src/esplora.rs

@@ -84,7 +84,9 @@ where
 	/// [`ChannelManager`]: lightning::ln::channelmanager::ChannelManager
 	/// [`Filter`]: lightning::chain::Filter
 	#[maybe_async]
-	pub fn sync(&self, confirmables: Vec<&(dyn Confirm + Sync + Send)>) -> Result<(), TxSyncError> {
+	pub fn sync<C: Deref>(&self, confirmables: Vec<C>) -> Result<(), TxSyncError>
+		where C::Target: Confirm
+	{
 		// This lock makes sure we're syncing once at a time.
 		#[cfg(not(feature = "async-interface"))]
 		let mut sync_state = self.sync_state.lock().unwrap();
@@ -239,10 +241,11 @@ where
 	}
 
 	#[maybe_async]
-	fn sync_best_block_updated(
-		&self, confirmables: &Vec<&(dyn Confirm + Sync + Send)>, sync_state: &mut SyncState, tip_hash: &BlockHash,
-	) -> Result<(), InternalError> {
-
+	fn sync_best_block_updated<C: Deref>(
+		&self, confirmables: &Vec<C>, sync_state: &mut SyncState, tip_hash: &BlockHash,
+	) -> Result<(), InternalError>
+		where C::Target: Confirm
+	{
 		// Inform the interface of the new block.
 		let tip_header = maybe_await!(self.client.get_header_by_hash(tip_hash))?;
 		let tip_status = maybe_await!(self.client.get_block_status(&tip_hash))?;
@@ -369,9 +372,11 @@ where
 	}
 
 	#[maybe_async]
-	fn get_unconfirmed_transactions(
-		&self, confirmables: &Vec<&(dyn Confirm + Sync + Send)>,
-	) -> Result<Vec<Txid>, InternalError> {
+	fn get_unconfirmed_transactions<C: Deref>(
+		&self, confirmables: &Vec<C>,
+	) -> Result<Vec<Txid>, InternalError>
+		where C::Target: Confirm
+	{
 		// Query the interface for relevant txids and check whether the relevant blocks are still
 		// in the best chain, mark them unconfirmed otherwise
 		let relevant_txids = confirmables