Make all internal signatures accept LowerBoundedFeeEstimator

lightning/src/chain/channelmonitor.rs

@@ -40,7 +40,7 @@ use ln::chan_utils::{CounterpartyCommitmentSecrets, HTLCOutputInCommitment, HTLC
 use ln::channelmanager::HTLCSource;
 use chain;
 use chain::{BestBlock, WatchedOutput};
-use chain::chaininterface::{BroadcasterInterface, FeeEstimator};
+use chain::chaininterface::{BroadcasterInterface, FeeEstimator, LowerBoundedFeeEstimator};
 use chain::transaction::{OutPoint, TransactionData};
 use chain::keysinterface::{SpendableOutputDescriptor, StaticPaymentOutputDescriptor, DelayedPaymentOutputDescriptor, Sign, KeysInterface};
 use chain::onchaintx::OnchainTxHandler;
@@ -1099,7 +1099,7 @@ impl<Signer: Sign> ChannelMonitor<Signer> {
 		payment_hash: &PaymentHash,
 		payment_preimage: &PaymentPreimage,
 		broadcaster: &B,
-		fee_estimator: &F,
+		fee_estimator: &LowerBoundedFeeEstimator<F>,
 		logger: &L,
 	) where
 		B::Target: BroadcasterInterface,
@@ -1295,8 +1295,9 @@ impl<Signer: Sign> ChannelMonitor<Signer> {
 		F::Target: FeeEstimator,
 		L::Target: Logger,
 	{
+		let bounded_fee_estimator = LowerBoundedFeeEstimator::new(fee_estimator);
 		self.inner.lock().unwrap().transactions_confirmed(
-			header, txdata, height, broadcaster, fee_estimator, logger)
+			header, txdata, height, broadcaster, &bounded_fee_estimator, logger)
 	}
 
 	/// Processes a transaction that was reorganized out of the chain.
@@ -1316,8 +1317,9 @@ impl<Signer: Sign> ChannelMonitor<Signer> {
 		F::Target: FeeEstimator,
 		L::Target: Logger,
 	{
+		let bounded_fee_estimator = LowerBoundedFeeEstimator::new(fee_estimator);
 		self.inner.lock().unwrap().transaction_unconfirmed(
-			txid, broadcaster, fee_estimator, logger);
+			txid, broadcaster, &bounded_fee_estimator, logger);
 	}
 
 	/// Updates the monitor with the current best chain tip, returning new outputs to watch. See
@@ -1340,8 +1342,9 @@ impl<Signer: Sign> ChannelMonitor<Signer> {
 		F::Target: FeeEstimator,
 		L::Target: Logger,
 	{
+		let bounded_fee_estimator = LowerBoundedFeeEstimator::new(fee_estimator);
 		self.inner.lock().unwrap().best_block_updated(
-			header, height, broadcaster, fee_estimator, logger)
+			header, height, broadcaster, &bounded_fee_estimator, logger)
 	}
 
 	/// Returns the set of txids that should be monitored for re-organization out of the chain.
@@ -1877,7 +1880,9 @@ impl<Signer: Sign> ChannelMonitorImpl<Signer> {
 
 	/// Provides a payment_hash->payment_preimage mapping. Will be automatically pruned when all
 	/// commitment_tx_infos which contain the payment hash have been revoked.
-	fn provide_payment_preimage<B: Deref, F: Deref, L: Deref>(&mut self, payment_hash: &PaymentHash, payment_preimage: &PaymentPreimage, broadcaster: &B, fee_estimator: &F, logger: &L)
+	fn provide_payment_preimage<B: Deref, F: Deref, L: Deref>(
+		&mut self, payment_hash: &PaymentHash, payment_preimage: &PaymentPreimage, broadcaster: &B,
+		fee_estimator: &LowerBoundedFeeEstimator<F>, logger: &L)
 	where B::Target: BroadcasterInterface,
 		    F::Target: FeeEstimator,
 		    L::Target: Logger,
@@ -1975,7 +1980,8 @@ impl<Signer: Sign> ChannelMonitorImpl<Signer> {
 				},
 				ChannelMonitorUpdateStep::PaymentPreimage { payment_preimage } => {
 					log_trace!(logger, "Updating ChannelMonitor with payment preimage");
-					self.provide_payment_preimage(&PaymentHash(Sha256::hash(&payment_preimage.0[..]).into_inner()), &payment_preimage, broadcaster, fee_estimator, logger)
+					let bounded_fee_estimator = LowerBoundedFeeEstimator::new(fee_estimator);
+					self.provide_payment_preimage(&PaymentHash(Sha256::hash(&payment_preimage.0[..]).into_inner()), &payment_preimage, broadcaster, &bounded_fee_estimator, logger)
 				},
 				ChannelMonitorUpdateStep::CommitmentSecret { idx, secret } => {
 					log_trace!(logger, "Updating ChannelMonitor with commitment secret");
@@ -2401,15 +2407,16 @@ impl<Signer: Sign> ChannelMonitorImpl<Signer> {
 		let block_hash = header.block_hash();
 		self.best_block = BestBlock::new(block_hash, height);
 
-		self.transactions_confirmed(header, txdata, height, broadcaster, fee_estimator, logger)
+		let bounded_fee_estimator = LowerBoundedFeeEstimator::new(fee_estimator);
+		self.transactions_confirmed(header, txdata, height, broadcaster, &bounded_fee_estimator, logger)
 	}
 
 	fn best_block_updated<B: Deref, F: Deref, L: Deref>(
 		&mut self,
 		header: &BlockHeader,
 		height: u32,
 		broadcaster: B,
-		fee_estimator: F,
+		fee_estimator: &LowerBoundedFeeEstimator<F>,
 		logger: L,
 	) -> Vec<TransactionOutputs>
 	where
@@ -2436,7 +2443,7 @@ impl<Signer: Sign> ChannelMonitorImpl<Signer> {
 		txdata: &TransactionData,
 		height: u32,
 		broadcaster: B,
-		fee_estimator: F,
+		fee_estimator: &LowerBoundedFeeEstimator<F>,
 		logger: L,
 	) -> Vec<TransactionOutputs>
 	where
@@ -2533,7 +2540,7 @@ impl<Signer: Sign> ChannelMonitorImpl<Signer> {
 		mut watch_outputs: Vec<TransactionOutputs>,
 		mut claimable_outpoints: Vec<PackageTemplate>,
 		broadcaster: &B,
-		fee_estimator: &F,
+		fee_estimator: &LowerBoundedFeeEstimator<F>,
 		logger: &L,
 	) -> Vec<TransactionOutputs>
 	where
@@ -2671,7 +2678,8 @@ impl<Signer: Sign> ChannelMonitorImpl<Signer> {
 		//- maturing spendable output has transaction paying us has been disconnected
 		self.onchain_events_awaiting_threshold_conf.retain(|ref entry| entry.height < height);
 
-		self.onchain_tx_handler.block_disconnected(height, broadcaster, fee_estimator, logger);
+		let bounded_fee_estimator = LowerBoundedFeeEstimator::new(fee_estimator);
+		self.onchain_tx_handler.block_disconnected(height, broadcaster, &bounded_fee_estimator, logger);
 
 		self.best_block = BestBlock::new(header.prev_blockhash, height - 1);
 	}
@@ -2680,7 +2688,7 @@ impl<Signer: Sign> ChannelMonitorImpl<Signer> {
 		&mut self,
 		txid: &Txid,
 		broadcaster: B,
-		fee_estimator: F,
+		fee_estimator: &LowerBoundedFeeEstimator<F>,
 		logger: L,
 	) where
 		B::Target: BroadcasterInterface,
@@ -3420,6 +3428,8 @@ mod tests {
 
 	use hex;
 
+	use crate::chain::chaininterface::LowerBoundedFeeEstimator;
+
 	use super::ChannelMonitorUpdateStep;
 	use ::{check_added_monitors, check_closed_broadcast, check_closed_event, check_spends, get_local_commitment_txn, get_monitor, get_route_and_payment_hash, unwrap_send_err};
 	use chain::{BestBlock, Confirm};
@@ -3541,7 +3551,7 @@ mod tests {
 		let secp_ctx = Secp256k1::new();
 		let logger = Arc::new(TestLogger::new());
 		let broadcaster = Arc::new(TestBroadcaster{txn_broadcasted: Mutex::new(Vec::new()), blocks: Arc::new(Mutex::new(Vec::new()))});
-		let fee_estimator = Arc::new(TestFeeEstimator { sat_per_kw: Mutex::new(253) });
+		let fee_estimator = TestFeeEstimator { sat_per_kw: Mutex::new(253) };
 
 		let dummy_key = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
 		let dummy_tx = Transaction { version: 0, lock_time: 0, input: Vec::new(), output: Vec::new() };
@@ -3640,7 +3650,8 @@ mod tests {
 		monitor.provide_latest_counterparty_commitment_tx(dummy_txid, preimages_slice_to_htlc_outputs!(preimages[17..20]), 281474976710653, dummy_key, &logger);
 		monitor.provide_latest_counterparty_commitment_tx(dummy_txid, preimages_slice_to_htlc_outputs!(preimages[18..20]), 281474976710652, dummy_key, &logger);
 		for &(ref preimage, ref hash) in preimages.iter() {
-			monitor.provide_payment_preimage(hash, preimage, &broadcaster, &fee_estimator, &logger);
+			let bounded_fee_estimator = LowerBoundedFeeEstimator::new(&fee_estimator);
+			monitor.provide_payment_preimage(hash, preimage, &broadcaster, &bounded_fee_estimator, &logger);
 		}
 
 		// Now provide a secret, pruning preimages 10-15

lightning/src/chain/onchaintx.rs

@@ -24,7 +24,7 @@ use bitcoin::secp256k1;
 use ln::msgs::DecodeError;
 use ln::PaymentPreimage;
 use ln::chan_utils::{ChannelTransactionParameters, HolderCommitmentTransaction};
-use chain::chaininterface::{FeeEstimator, BroadcasterInterface};
+use chain::chaininterface::{FeeEstimator, BroadcasterInterface, LowerBoundedFeeEstimator};
 use chain::channelmonitor::{ANTI_REORG_DELAY, CLTV_SHARED_CLAIM_BUFFER};
 use chain::keysinterface::{Sign, KeysInterface};
 use chain::package::PackageTemplate;
@@ -377,7 +377,7 @@ impl<ChannelSigner: Sign> OnchainTxHandler<ChannelSigner> {
 	/// (CSV or CLTV following cases). In case of high-fee spikes, claim tx may stuck in the mempool, so you need to bump its feerate quickly using Replace-By-Fee or Child-Pay-For-Parent.
 	/// Panics if there are signing errors, because signing operations in reaction to on-chain events
 	/// are not expected to fail, and if they do, we may lose funds.
-	fn generate_claim_tx<F: Deref, L: Deref>(&mut self, cur_height: u32, cached_request: &PackageTemplate, fee_estimator: &F, logger: &L) -> Option<(Option<u32>, u64, Transaction)>
+	fn generate_claim_tx<F: Deref, L: Deref>(&mut self, cur_height: u32, cached_request: &PackageTemplate, fee_estimator: &LowerBoundedFeeEstimator<F>, logger: &L) -> Option<(Option<u32>, u64, Transaction)>
 		where F::Target: FeeEstimator,
 					L::Target: Logger,
 	{
@@ -415,7 +415,7 @@ impl<ChannelSigner: Sign> OnchainTxHandler<ChannelSigner> {
 	/// `conf_height` represents the height at which the transactions in `txn_matched` were
 	/// confirmed. This does not need to equal the current blockchain tip height, which should be
 	/// provided via `cur_height`, however it must never be higher than `cur_height`.
-	pub(crate) fn update_claims_view<B: Deref, F: Deref, L: Deref>(&mut self, txn_matched: &[&Transaction], requests: Vec<PackageTemplate>, conf_height: u32, cur_height: u32, broadcaster: &B, fee_estimator: &F, logger: &L)
+	pub(crate) fn update_claims_view<B: Deref, F: Deref, L: Deref>(&mut self, txn_matched: &[&Transaction], requests: Vec<PackageTemplate>, conf_height: u32, cur_height: u32, broadcaster: &B, fee_estimator: &LowerBoundedFeeEstimator<F>, logger: &L)
 		where B::Target: BroadcasterInterface,
 		      F::Target: FeeEstimator,
 					L::Target: Logger,
@@ -617,7 +617,7 @@ impl<ChannelSigner: Sign> OnchainTxHandler<ChannelSigner> {
 		&mut self,
 		txid: &Txid,
 		broadcaster: B,
-		fee_estimator: F,
+		fee_estimator: &LowerBoundedFeeEstimator<F>,
 		logger: L,
 	) where
 		B::Target: BroadcasterInterface,
@@ -637,7 +637,7 @@ impl<ChannelSigner: Sign> OnchainTxHandler<ChannelSigner> {
 		}
 	}
 
-	pub(crate) fn block_disconnected<B: Deref, F: Deref, L: Deref>(&mut self, height: u32, broadcaster: B, fee_estimator: F, logger: L)
+	pub(crate) fn block_disconnected<B: Deref, F: Deref, L: Deref>(&mut self, height: u32, broadcaster: B, fee_estimator: &LowerBoundedFeeEstimator<F>, logger: L)
 		where B::Target: BroadcasterInterface,
 		      F::Target: FeeEstimator,
 					L::Target: Logger,
@@ -667,7 +667,7 @@ impl<ChannelSigner: Sign> OnchainTxHandler<ChannelSigner> {
 			}
 		}
 		for (_, request) in bump_candidates.iter_mut() {
-			if let Some((new_timer, new_feerate, bump_tx)) = self.generate_claim_tx(height, &request, &&*fee_estimator, &&*logger) {
+			if let Some((new_timer, new_feerate, bump_tx)) = self.generate_claim_tx(height, &request, &fee_estimator, &&*logger) {
 				request.set_timer(new_timer);
 				request.set_feerate(new_feerate);
 				log_info!(logger, "Broadcasting onchain {}", log_tx!(bump_tx));

lightning/src/chain/package.rs

@@ -38,6 +38,8 @@ use core::mem;
 use core::ops::Deref;
 use bitcoin::Witness;
 
+use super::chaininterface::LowerBoundedFeeEstimator;
+
 const MAX_ALLOC_SIZE: usize = 64*1024;
 
 
@@ -665,7 +667,7 @@ impl PackageTemplate {
 	/// Returns value in satoshis to be included as package outgoing output amount and feerate
 	/// which was used to generate the value. Will not return less than `dust_limit_sats` for the
 	/// value.
-	pub(crate) fn compute_package_output<F: Deref, L: Deref>(&self, predicted_weight: usize, dust_limit_sats: u64, fee_estimator: &F, logger: &L) -> Option<(u64, u64)>
+	pub(crate) fn compute_package_output<F: Deref, L: Deref>(&self, predicted_weight: usize, dust_limit_sats: u64, fee_estimator: &LowerBoundedFeeEstimator<F>, logger: &L) -> Option<(u64, u64)>
 		where F::Target: FeeEstimator,
 		      L::Target: Logger,
 	{
@@ -772,7 +774,7 @@ impl Readable for PackageTemplate {
 /// If the proposed fee is less than the available spent output's values, we return the proposed
 /// fee and the corresponding updated feerate. If the proposed fee is equal or more than the
 /// available spent output's values, we return nothing
-fn compute_fee_from_spent_amounts<F: Deref, L: Deref>(input_amounts: u64, predicted_weight: usize, fee_estimator: &F, logger: &L) -> Option<(u64, u64)>
+fn compute_fee_from_spent_amounts<F: Deref, L: Deref>(input_amounts: u64, predicted_weight: usize, fee_estimator: &LowerBoundedFeeEstimator<F>, logger: &L) -> Option<(u64, u64)>
 	where F::Target: FeeEstimator,
 	      L::Target: Logger,
 {
@@ -808,7 +810,7 @@ fn compute_fee_from_spent_amounts<F: Deref, L: Deref>(input_amounts: u64, predic
 /// attempt, use them. Otherwise, blindly bump the feerate by 25% of the previous feerate. We also
 /// verify that those bumping heuristics respect BIP125 rules 3) and 4) and if required adjust
 /// the new fee to meet the RBF policy requirement.
-fn feerate_bump<F: Deref, L: Deref>(predicted_weight: usize, input_amounts: u64, previous_feerate: u64, fee_estimator: &F, logger: &L) -> Option<(u64, u64)>
+fn feerate_bump<F: Deref, L: Deref>(predicted_weight: usize, input_amounts: u64, previous_feerate: u64, fee_estimator: &LowerBoundedFeeEstimator<F>, logger: &L) -> Option<(u64, u64)>
 	where F::Target: FeeEstimator,
 	      L::Target: Logger,
 {

lightning/src/ln/channel.rs

@@ -31,7 +31,7 @@ use ln::channelmanager::{CounterpartyForwardingInfo, PendingHTLCStatus, HTLCSour
 use ln::chan_utils::{CounterpartyCommitmentSecrets, TxCreationKeys, HTLCOutputInCommitment, htlc_success_tx_weight, htlc_timeout_tx_weight, make_funding_redeemscript, ChannelPublicKeys, CommitmentTransaction, HolderCommitmentTransaction, ChannelTransactionParameters, CounterpartyChannelTransactionParameters, MAX_HTLCS, get_commitment_transaction_number_obscure_factor, ClosingTransaction};
 use ln::chan_utils;
 use chain::BestBlock;
-use chain::chaininterface::{FeeEstimator,ConfirmationTarget};
+use chain::chaininterface::{FeeEstimator, ConfirmationTarget, LowerBoundedFeeEstimator};
 use chain::channelmonitor::{ChannelMonitor, ChannelMonitorUpdate, ChannelMonitorUpdateStep, LATENCY_GRACE_PERIOD_BLOCKS};
 use chain::transaction::{OutPoint, TransactionData};
 use chain::keysinterface::{Sign, KeysInterface};
@@ -917,7 +917,7 @@ impl<Signer: Sign> Channel<Signer> {
 			return Err(APIError::APIMisuseError { err: format!("Holder selected channel  reserve below implemention limit dust_limit_satoshis {}", holder_selected_channel_reserve_satoshis) });
 		}
 
-		let feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Normal);
+		let feerate = LowerBoundedFeeEstimator::new(fee_estimator).get_est_sat_per_1000_weight(ConfirmationTarget::Normal);
 
 		let value_to_self_msat = channel_value_satoshis * 1000 - push_msat;
 		let commitment_tx_fee = Self::commit_tx_fee_msat(feerate, MIN_AFFORDABLE_HTLC_COUNT, opt_anchors);
@@ -1056,7 +1056,7 @@ impl<Signer: Sign> Channel<Signer> {
 		})
 	}
 
-	fn check_remote_fee<F: Deref>(fee_estimator: &F, feerate_per_kw: u32) -> Result<(), ChannelError>
+	fn check_remote_fee<F: Deref>(fee_estimator: &LowerBoundedFeeEstimator<F>, feerate_per_kw: u32) -> Result<(), ChannelError>
 		where F::Target: FeeEstimator
 	{
 		// We only bound the fee updates on the upper side to prevent completely absurd feerates,
@@ -1160,7 +1160,7 @@ impl<Signer: Sign> Channel<Signer> {
 		if msg.htlc_minimum_msat >= full_channel_value_msat {
 			return Err(ChannelError::Close(format!("Minimum htlc value ({}) was larger than full channel value ({})", msg.htlc_minimum_msat, full_channel_value_msat)));
 		}
-		Channel::<Signer>::check_remote_fee(fee_estimator, msg.feerate_per_kw)?;
+		Channel::<Signer>::check_remote_fee(&LowerBoundedFeeEstimator::new(fee_estimator), msg.feerate_per_kw)?;
 
 		let max_counterparty_selected_contest_delay = u16::min(config.channel_handshake_limits.their_to_self_delay, MAX_LOCAL_BREAKDOWN_TIMEOUT);
 		if msg.to_self_delay > max_counterparty_selected_contest_delay {
@@ -3696,7 +3696,7 @@ impl<Signer: Sign> Channel<Signer> {
 		if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
 			return Err(ChannelError::Close("Peer sent update_fee when we needed a channel_reestablish".to_owned()));
 		}
-		Channel::<Signer>::check_remote_fee(fee_estimator, msg.feerate_per_kw)?;
+		Channel::<Signer>::check_remote_fee(&LowerBoundedFeeEstimator::new(fee_estimator), msg.feerate_per_kw)?;
 		let feerate_over_dust_buffer = msg.feerate_per_kw > self.get_dust_buffer_feerate(None);
 
 		self.pending_update_fee = Some((msg.feerate_per_kw, FeeUpdateState::RemoteAnnounced));
@@ -4013,7 +4013,8 @@ impl<Signer: Sign> Channel<Signer> {
 	/// Calculates and returns our minimum and maximum closing transaction fee amounts, in whole
 	/// satoshis. The amounts remain consistent unless a peer disconnects/reconnects or we restart,
 	/// at which point they will be recalculated.
-	fn calculate_closing_fee_limits<F: Deref>(&mut self, fee_estimator: &F) -> (u64, u64)
+	fn calculate_closing_fee_limits<F: Deref>(&mut self, fee_estimator: &LowerBoundedFeeEstimator<F>)
+		-> (u64, u64)
 		where F::Target: FeeEstimator
 	{
 		if let Some((min, max)) = self.closing_fee_limits { return (min, max); }
@@ -4097,12 +4098,13 @@ impl<Signer: Sign> Channel<Signer> {
 
 		if !self.is_outbound() {
 			if let Some(msg) = &self.pending_counterparty_closing_signed.take() {
-				return self.closing_signed(fee_estimator, &msg);
+				return self.closing_signed(&fee_estimator, &msg);
 			}
 			return Ok((None, None));
 		}
 
-		let (our_min_fee, our_max_fee) = self.calculate_closing_fee_limits(fee_estimator);
+		let bounded_fee_estimator = LowerBoundedFeeEstimator::new(fee_estimator);
+		let (our_min_fee, our_max_fee) = self.calculate_closing_fee_limits(&bounded_fee_estimator);
 
 		assert!(self.shutdown_scriptpubkey.is_some());
 		let (closing_tx, total_fee_satoshis) = self.build_closing_transaction(our_min_fee, false);
@@ -4300,7 +4302,8 @@ impl<Signer: Sign> Channel<Signer> {
 			}
 		}
 
-		let (our_min_fee, our_max_fee) = self.calculate_closing_fee_limits(fee_estimator);
+		let bounded_fee_estimator = LowerBoundedFeeEstimator::new(fee_estimator);
+		let (our_min_fee, our_max_fee) = self.calculate_closing_fee_limits(&bounded_fee_estimator);
 
 		macro_rules! propose_fee {
 			($new_fee: expr) => {
@@ -6572,7 +6575,7 @@ mod tests {
 	use ln::chan_utils;
 	use ln::chan_utils::{htlc_success_tx_weight, htlc_timeout_tx_weight};
 	use chain::BestBlock;
-	use chain::chaininterface::{FeeEstimator,ConfirmationTarget};
+	use chain::chaininterface::{FeeEstimator, LowerBoundedFeeEstimator, ConfirmationTarget};
 	use chain::keysinterface::{InMemorySigner, Recipient, KeyMaterial, KeysInterface};
 	use chain::transaction::OutPoint;
 	use util::config::UserConfig;
@@ -6611,7 +6614,9 @@ mod tests {
 	fn test_no_fee_check_overflow() {
 		// Previously, calling `check_remote_fee` with a fee of 0xffffffff would overflow in
 		// arithmetic, causing a panic with debug assertions enabled.
-		assert!(Channel::<InMemorySigner>::check_remote_fee(&&TestFeeEstimator { fee_est: 42 }, u32::max_value()).is_err());
+		let fee_est = TestFeeEstimator { fee_est: 42 };
+		let bounded_fee_estimator = LowerBoundedFeeEstimator::new(&fee_est);
+		assert!(Channel::<InMemorySigner>::check_remote_fee(&bounded_fee_estimator, u32::max_value()).is_err());
 	}
 
 	struct Keys {
@@ -6661,11 +6666,10 @@ mod tests {
 			returns: non_v0_segwit_shutdown_script.clone(),
 		});
 
-		let fee_estimator = TestFeeEstimator { fee_est: 253 };
 		let secp_ctx = Secp256k1::new();
 		let node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
 		let config = UserConfig::default();
-		match Channel::<EnforcingSigner>::new_outbound(&&fee_estimator, &&keys_provider, node_id, &features, 10000000, 100000, 42, &config, 0, 42) {
+		match Channel::<EnforcingSigner>::new_outbound(&&TestFeeEstimator { fee_est: 253 }, &&keys_provider, node_id, &features, 10000000, 100000, 42, &config, 0, 42) {
 			Err(APIError::IncompatibleShutdownScript { script }) => {
 				assert_eq!(script.into_inner(), non_v0_segwit_shutdown_script.into_inner());
 			},