Added clippy ignore rules for all errors and warnings

.github/workflows/build.yml

@@ -251,7 +251,95 @@ jobs:
           rustup component add clippy
       - name: Run default clippy linting
         run: |
-          cargo clippy -- -Aclippy::erasing_op -Aclippy::never_loop -Aclippy::if_same_then_else -Dclippy::try_err
+          RUSTFLAGS='-D warnings' cargo clippy -- \
+                `# Errors` \
+                -A clippy::erasing_op \
+                -A clippy::never_loop \
+                `# Warnings` \
+                -A renamed_and_removed_lints \
+                -A clippy::blocks_in_conditions \
+                -A clippy::borrow_deref_ref \
+                -A clippy::clone_on_copy \
+                -A clippy::collapsible_else_if \
+                -A clippy::collapsible_if \
+                -A clippy::collapsible_match \
+                -A clippy::comparison_chain \
+                -A clippy::doc_lazy_continuation \
+                -A clippy::drain_collect \
+                -A clippy::drop_non_drop \
+                -A clippy::enum_variant_names \
+                -A clippy::explicit_auto_deref \
+                -A clippy::extra_unused_lifetimes \
+                -A clippy::for_kv_map \
+                -A clippy::from_over_into \
+                -A clippy::get_first \
+                -A clippy::identity_op \
+                -A clippy::if_same_then_else \
+                -A clippy::inconsistent_digit_grouping \
+                -A clippy::iter_kv_map \
+                -A clippy::iter_skip_next \
+                -A clippy::large_enum_variant \
+                -A clippy::legacy_numeric_constants \
+                -A clippy::len_without_is_empty \
+                -A clippy::len_zero \
+                -A clippy::let_and_return \
+                -A clippy::manual_filter \
+                -A clippy::manual_map \
+                -A clippy::manual_memcpy \
+                -A clippy::manual_range_contains \
+                -A clippy::manual_range_patterns \
+                -A clippy::manual_saturating_arithmetic \
+                -A clippy::manual_strip \
+                -A clippy::map_clone \
+                -A clippy::map_flatten \
+                -A clippy::match_like_matches_macro \
+                -A clippy::match_ref_pats \
+                -A clippy::multiple_bound_locations \
+                -A clippy::mut_mutex_lock \
+                -A clippy::needless_bool \
+                -A clippy::needless_borrow \
+                -A clippy::needless_borrowed_reference \
+                -A clippy::needless_borrows_for_generic_args \
+                -A clippy::needless_lifetimes \
+                -A clippy::needless_question_mark \
+                -A clippy::needless_range_loop \
+                -A clippy::needless_return \
+                -A clippy::new_without_default \
+                -A clippy::non_minimal_cfg \
+                -A clippy::op_ref \
+                -A clippy::option_as_ref_deref \
+                -A clippy::option_map_or_none \
+                -A clippy::option_map_unit_fn \
+                -A clippy::precedence \
+                -A clippy::ptr_arg \
+                -A clippy::question_mark \
+                -A clippy::readonly_write_lock \
+                -A clippy::redundant_closure \
+                -A clippy::redundant_field_names \
+                -A clippy::redundant_guards \
+                -A clippy::redundant_pattern_matching \
+                -A clippy::redundant_slicing \
+                -A clippy::redundant_static_lifetimes \
+                -A clippy::result_large_err \
+                -A clippy::result_unit_err \
+                -A clippy::search_is_some \
+                -A clippy::single_char_pattern \
+                -A clippy::single_match \
+                -A clippy::slow_vector_initialization \
+                -A clippy::tabs_in_doc_comments \
+                -A clippy::to_string_in_format_args \
+                -A clippy::too_many_arguments \
+                -A clippy::toplevel_ref_arg \
+                -A clippy::type_complexity \
+                -A clippy::unnecessary_cast \
+                -A clippy::unnecessary_get_then_check \
+                -A clippy::unnecessary_lazy_evaluations \
+                -A clippy::unnecessary_mut_passed \
+                -A clippy::unnecessary_sort_by \
+                -A clippy::unnecessary_to_owned \
+                -A clippy::unnecessary_unwrap \
+                -A clippy::unused_unit \
+                -A clippy::useless_conversion
 
   rustfmt:
     runs-on: ubuntu-latest

lightning-rapid-gossip-sync/src/processing.rs

@@ -176,7 +176,7 @@ where
 						.and_then(|node| node.announcement_info.as_ref())
 						.map(|info| {
 							synthetic_node_announcement.features = info.features().clone();
-							synthetic_node_announcement.rgb = info.rgb().clone();
+							synthetic_node_announcement.rgb.clone_from(&info.rgb());
 							synthetic_node_announcement.alias = info.alias().clone();
 							synthetic_node_announcement.addresses = info.addresses().to_vec();
 						});

lightning/src/chain/onchaintx.rs

@@ -761,7 +761,7 @@ impl<ChannelSigner: EcdsaChannelSigner> OnchainTxHandler<ChannelSigner> {
 					for outpoint in req.outpoints() {
 						log_info!(logger, "  Outpoint {}", outpoint);
 					}
-					self.locktimed_packages.entry(package_locktime).or_insert(Vec::new()).push(req);
+					self.locktimed_packages.entry(package_locktime).or_default().push(req);
 					continue;
 				}
 

lightning/src/chain/package.rs

@@ -1033,8 +1033,7 @@ impl PackageTemplate {
 
 	pub (crate) fn build_package(txid: Txid, vout: u32, input_solving_data: PackageSolvingData, soonest_conf_deadline: u32, height_original: u32) -> Self {
 		let (malleability, aggregable) = PackageSolvingData::map_output_type_flags(&input_solving_data);
-		let mut inputs = Vec::with_capacity(1);
-		inputs.push((BitcoinOutPoint { txid, vout }, input_solving_data));
+		let inputs = vec![(BitcoinOutPoint { txid, vout }, input_solving_data)];
 		PackageTemplate {
 			inputs,
 			malleability,

lightning/src/crypto/chacha20.rs

@@ -176,7 +176,7 @@ mod real_chacha {
 		) {
 			let block = ChaCha20::get_single_block(key, nonce);
 			for i in 0..bytes.len() {
-				bytes[i] = block[i] ^ bytes[i];
+				bytes[i] ^= block[i];
 			}
 		}
 

lightning/src/crypto/chacha20poly1305rfc.rs

@@ -59,7 +59,7 @@ mod real_chachapoly {
 
 		pub fn encrypt(&mut self, input: &[u8], output: &mut [u8], out_tag: &mut [u8]) {
 			assert!(input.len() == output.len());
-			assert!(self.finished == false);
+			assert!(!self.finished);
 			self.cipher.process(input, output);
 			self.data_len += input.len();
 			self.mac.input(output);
@@ -78,7 +78,7 @@ mod real_chachapoly {
 		// Encrypt `input_output` in-place. To finish and calculate the tag, use `finish_and_get_tag`
 		// below.
 		pub(in super::super) fn encrypt_in_place(&mut self, input_output: &mut [u8]) {
-			debug_assert!(self.finished == false);
+			debug_assert!(!self.finished);
 			self.cipher.process_in_place(input_output);
 			self.data_len += input_output.len();
 			self.mac.input(input_output);
@@ -87,7 +87,7 @@ mod real_chachapoly {
 		// If we were previously encrypting with `encrypt_in_place`, this method can be used to finish
 		// encrypting and calculate the tag.
 		pub(in super::super) fn finish_and_get_tag(&mut self, out_tag: &mut [u8]) {
-			debug_assert!(self.finished == false);
+			debug_assert!(!self.finished);
 			ChaCha20Poly1305RFC::pad_mac_16(&mut self.mac, self.data_len);
 			self.finished = true;
 			self.mac.input(&self.aad_len.to_le_bytes());
@@ -100,7 +100,7 @@ mod real_chachapoly {
 		/// this decryption is *variable time*.
 		pub fn variable_time_decrypt(&mut self, input: &[u8], output: &mut [u8], tag: &[u8]) -> Result<(), ()> {
 			assert!(input.len() == output.len());
-			assert!(self.finished == false);
+			assert!(!self.finished);
 
 			self.finished = true;
 
@@ -131,7 +131,7 @@ mod real_chachapoly {
 		///
 		/// Should never be `pub` because the public API should always enforce tag checking.
 		pub(in super::super) fn decrypt_in_place(&mut self, input_output: &mut [u8]) {
-			debug_assert!(self.finished == false);
+			debug_assert!(!self.finished);
 			self.mac.input(input_output);
 			self.data_len += input_output.len();
 			self.cipher.process_in_place(input_output);
@@ -140,7 +140,7 @@ mod real_chachapoly {
 		/// If we were previously decrypting with `just_decrypt_in_place`, this method must be used
 		/// to check the tag. Returns whether or not the tag is valid.
 		pub(in super::super) fn finish_and_check_tag(&mut self, tag: &[u8]) -> bool {
-			debug_assert!(self.finished == false);
+			debug_assert!(!self.finished);
 			self.finished = true;
 			ChaCha20Poly1305RFC::pad_mac_16(&mut self.mac, self.data_len);
 			self.mac.input(&self.aad_len.to_le_bytes());

lightning/src/crypto/poly1305.rs

@@ -82,7 +82,7 @@ impl Poly1305 {
 		d2 += c as u64; c = (d2 >> 26) as u32; h2 = d2 as u32 & 0x3ffffff;
 		d3 += c as u64; c = (d3 >> 26) as u32; h3 = d3 as u32 & 0x3ffffff;
 		d4 += c as u64; c = (d4 >> 26) as u32; h4 = d4 as u32 & 0x3ffffff;
-		h0 += c * 5;    c = h0 >> 26; h0 = h0 & 0x3ffffff;
+		h0 += c * 5;    c = h0 >> 26; h0 &= 0x3ffffff;
 		h1 += c;
 
 		self.h[0] = h0;
@@ -111,11 +111,11 @@ impl Poly1305 {
 		let mut h4 = self.h[4];
 
 		let mut c : u32;
-		             c = h1 >> 26; h1 = h1 & 0x3ffffff;
-		h2 +=     c; c = h2 >> 26; h2 = h2 & 0x3ffffff;
-		h3 +=     c; c = h3 >> 26; h3 = h3 & 0x3ffffff;
-		h4 +=     c; c = h4 >> 26; h4 = h4 & 0x3ffffff;
-		h0 += c * 5; c = h0 >> 26; h0 = h0 & 0x3ffffff;
+		             c = h1 >> 26; h1 &= 0x3ffffff;
+		h2 +=     c; c = h2 >> 26; h2 &= 0x3ffffff;
+		h3 +=     c; c = h3 >> 26; h3 &= 0x3ffffff;
+		h4 +=     c; c = h4 >> 26; h4 &= 0x3ffffff;
+		h0 += c * 5; c = h0 >> 26; h0 &= 0x3ffffff;
 		h1 +=     c;
 
 		// compute h + -p

lightning/src/events/mod.rs

@@ -1271,6 +1271,7 @@ pub enum Event {
 		///
 		/// This field will be `None` for objects serialized prior to LDK 0.0.117.
 		channel_capacity_sats: Option<u64>,
+
 		/// The original channel funding TXO; this helps checking for the existence and confirmation
 		/// status of the closing tx.
 		/// Note that for instances serialized in v0.0.119 or prior this will be missing (None).
@@ -2049,7 +2050,7 @@ impl MaybeReadable for Event {
 						payment_hash,
 						purpose: _init_tlv_based_struct_field!(purpose, upgradable_required),
 						amount_msat,
-						htlcs: htlcs.unwrap_or(vec![]),
+						htlcs: htlcs.unwrap_or_default(),
 						sender_intended_total_msat,
 						onion_fields,
 					}))

lightning/src/ln/chan_utils.rs

@@ -221,13 +221,12 @@ pub fn build_commitment_secret(commitment_seed: &[u8; 32], idx: u64) -> [u8; 32]
 /// Build a closing transaction
 pub fn build_closing_transaction(to_holder_value_sat: Amount, to_counterparty_value_sat: Amount, to_holder_script: ScriptBuf, to_counterparty_script: ScriptBuf, funding_outpoint: OutPoint) -> Transaction {
 	let txins = {
-		let mut ins: Vec<TxIn> = Vec::new();
-		ins.push(TxIn {
+		let ins: Vec<TxIn> = vec![TxIn {
 			previous_output: funding_outpoint,
 			script_sig: ScriptBuf::new(),
 			sequence: Sequence::MAX,
 			witness: Witness::new(),
-		});
+		}];
 		ins
 	};
 
@@ -702,8 +701,7 @@ pub(crate) fn make_funding_redeemscript_from_slices(broadcaster_funding_key: &[u
 /// Panics if htlc.transaction_output_index.is_none() (as such HTLCs do not appear in the
 /// commitment transaction).
 pub fn build_htlc_transaction(commitment_txid: &Txid, feerate_per_kw: u32, contest_delay: u16, htlc: &HTLCOutputInCommitment, channel_type_features: &ChannelTypeFeatures, broadcaster_delayed_payment_key: &DelayedPaymentKey, revocation_key: &RevocationKey) -> Transaction {
-	let mut txins: Vec<TxIn> = Vec::new();
-	txins.push(build_htlc_input(commitment_txid, htlc, channel_type_features));
+	let txins= vec![build_htlc_input(commitment_txid, htlc, channel_type_features)];
 
 	let mut txouts: Vec<TxOut> = Vec::new();
 	txouts.push(build_htlc_output(
@@ -1590,14 +1588,13 @@ impl CommitmentTransaction {
 			commitment_transaction_number_obscure_factor ^ (INITIAL_COMMITMENT_NUMBER - commitment_number);
 
 		let txins = {
-			let mut ins: Vec<TxIn> = Vec::new();
-			ins.push(TxIn {
+			let ins: Vec<TxIn> = vec![TxIn {
 				previous_output: channel_parameters.funding_outpoint(),
 				script_sig: ScriptBuf::new(),
 				sequence: Sequence(((0x80 as u32) << 8 * 3)
 					| ((obscured_commitment_transaction_number >> 3 * 8) as u32)),
 				witness: Witness::new(),
-			});
+			}];
 			ins
 		};
 		(obscured_commitment_transaction_number, txins)

lightning/src/ln/channel.rs

@@ -610,7 +610,7 @@ impl ChannelState {
 		}
 	}
 
-	fn to_u32(&self) -> u32 {
+	fn to_u32(self) -> u32 {
 		match self {
 			ChannelState::NegotiatingFunding(flags) => flags.0,
 			ChannelState::FundingNegotiated => state_flags::FUNDING_NEGOTIATED,
@@ -9505,7 +9505,7 @@ impl<'a, 'b, 'c, ES: Deref, SP: Deref> ReadableArgs<(&'a ES, &'b SP, u32, &'c Ch
 				monitor_pending_forwards,
 				monitor_pending_failures,
 				monitor_pending_finalized_fulfills: monitor_pending_finalized_fulfills.unwrap(),
-				monitor_pending_update_adds: monitor_pending_update_adds.unwrap_or(Vec::new()),
+				monitor_pending_update_adds: monitor_pending_update_adds.unwrap_or_default(),
 
 				signer_pending_revoke_and_ack: false,
 				signer_pending_commitment_update: false,

lightning/src/ln/channelmanager.rs

@@ -5165,7 +5165,7 @@ where
 						failure_code: fail_malformed_htlc.failure_code,
 					},
 				};
-				self.forward_htlcs.lock().unwrap().entry(incoming_scid).or_insert(vec![]).push(failure);
+				self.forward_htlcs.lock().unwrap().entry(incoming_scid).or_default().push(failure);
 				self.pending_events.lock().unwrap().push_back((events::Event::HTLCHandlingFailed {
 					prev_channel_id: incoming_channel_id,
 					failed_next_destination: htlc_destination,
@@ -6770,7 +6770,7 @@ where
 
 				peer_state.actions_blocking_raa_monitor_updates
 					.entry(prev_hop.channel_id)
-					.or_insert_with(Vec::new)
+					.or_default()
 					.push(raa_blocker);
 			} else {
 				debug_assert!(false,

lightning/src/ln/peer_handler.rs

@@ -1431,7 +1431,7 @@ impl<Descriptor: SocketDescriptor, CM: Deref, RM: Deref, OM: Deref, L: Deref, CM
 					let peer = &mut *peer_lock;
 					let mut msg_to_handle = None;
 					if peer_node_id.is_none() {
-						peer_node_id = peer.their_node_id.clone();
+						peer_node_id.clone_from(&peer.their_node_id);
 					}
 
 					assert!(peer.pending_read_buffer.len() > 0);

lightning/src/offers/invoice.rs

@@ -1018,7 +1018,7 @@ impl InvoiceContents {
 		self.fields().fallbacks
 			.as_ref()
 			.map(|fallbacks| filter_fallbacks(self.chain(), fallbacks))
-			.unwrap_or_else(Vec::new)
+			.unwrap_or_default()
 	}
 
 	fn features(&self) -> &Bolt12InvoiceFeatures {

lightning/src/offers/offer.rs

@@ -1048,7 +1048,7 @@ pub enum Quantity {
 }
 
 impl Quantity {
-	fn to_tlv_record(&self) -> Option<u64> {
+	fn to_tlv_record(self) -> Option<u64> {
 		match self {
 			Quantity::Bounded(n) => Some(n.get()),
 			Quantity::Unbounded => Some(0),

lightning/src/offers/signer.rs

@@ -240,7 +240,7 @@ impl MetadataMaterial {
 		self.hmac.input(DERIVED_METADATA_HMAC_INPUT);
 		self.maybe_include_encrypted_payment_id();
 
-		let mut bytes = self.encrypted_payment_id.map(|id| id.to_vec()).unwrap_or(vec![]);
+		let mut bytes = self.encrypted_payment_id.map(|id| id.to_vec()).unwrap_or_default();
 		bytes.extend_from_slice(self.nonce.as_slice());
 		bytes.extend_from_slice(Hmac::from_engine(self.hmac).as_byte_array());
 		bytes
@@ -256,7 +256,7 @@ impl MetadataMaterial {
 		self.hmac.input(DERIVED_METADATA_AND_KEYS_HMAC_INPUT);
 		self.maybe_include_encrypted_payment_id();
 
-		let bytes = self.encrypted_payment_id.map(|id| id.to_vec()).unwrap_or(vec![]);
+		let bytes = self.encrypted_payment_id.map(|id| id.to_vec()).unwrap_or_default();
 
 		let hmac = Hmac::from_engine(self.hmac);
 		let privkey = SecretKey::from_slice(hmac.as_byte_array()).unwrap();

lightning/src/routing/gossip.rs

@@ -509,10 +509,10 @@ where U::Target: UtxoLookup, L::Target: Logger
 				let mut one_to_two_announcement: Option<msgs::ChannelUpdate> = None;
 				let mut two_to_one_announcement: Option<msgs::ChannelUpdate> = None;
 				if let Some(one_to_two) = chan.one_to_two.as_ref() {
-					one_to_two_announcement = one_to_two.last_update_message.clone();
+					one_to_two_announcement.clone_from(&one_to_two.last_update_message);
 				}
 				if let Some(two_to_one) = chan.two_to_one.as_ref() {
-					two_to_one_announcement = two_to_one.last_update_message.clone();
+					two_to_one_announcement.clone_from(&two_to_one.last_update_message);
 				}
 				return Some((chan_announcement, one_to_two_announcement, two_to_one_announcement));
 			} else {

lightning/src/routing/router.rs

@@ -1704,7 +1704,7 @@ where L::Target: Logger {
 						.filter(|(p, _)| p.blinded_hops().len() == 1)
 						.any(|(_, iter_info_opt)| iter_info_opt.is_some() && iter_info_opt != info_opt)
 				{
-					return Err(LightningError{err: format!("1-hop blinded paths must all have matching introduction node ids"), action: ErrorAction::IgnoreError});
+					return Err(LightningError{err: "1-hop blinded paths must all have matching introduction node ids".to_string(), action: ErrorAction::IgnoreError});
 				}
 			}
 		}

lightning/src/routing/scoring.rs

@@ -1587,7 +1587,7 @@ mod bucketed_history {
 	}
 
 	impl LegacyHistoricalBucketRangeTracker {
-		pub(crate) fn into_current(&self) -> HistoricalBucketRangeTracker {
+		pub(crate) fn into_current(self) -> HistoricalBucketRangeTracker {
 			let mut buckets = [0; 32];
 			for (idx, legacy_bucket) in self.buckets.iter().enumerate() {
 				let mut new_val = *legacy_bucket;

lightning/src/routing/utxo.rs

@@ -512,9 +512,9 @@ impl PendingChecks {
 								if let Some(msg) = full_msg { ChannelAnnouncement::Full(msg.clone()) }
 								else { ChannelAnnouncement::Unsigned(msg.clone()) });
 							pending_checks.nodes.entry(msg.node_id_1)
-								.or_insert(Vec::new()).push(Arc::downgrade(&future.state));
+								.or_default().push(Arc::downgrade(&future.state));
 							pending_checks.nodes.entry(msg.node_id_2)
-								.or_insert(Vec::new()).push(Arc::downgrade(&future.state));
+								.or_default().push(Arc::downgrade(&future.state));
 							Err(LightningError {
 								err: "Channel being checked async".to_owned(),
 								action: ErrorAction::IgnoreAndLog(Level::Gossip),