Drop single-use macro from check_spend_holder_transaction

The wait_threshold_conf!() macro in check_spend_holder_transaction
was only used once, making it a good candidate for inlining at the
callsite. Further, it incorrectly always logged that we were
failing HTLCs from the "latest" commitment transaction, when it is
sometimes actually failing HTLCs from the previous commitment
transaction.

Author: TheBlueMatt

lightning/src/chain/channelmonitor.rs

@@ -1779,27 +1779,6 @@ impl<Signer: Sign> ChannelMonitorImpl<Signer> {
 		let mut claim_requests = Vec::new();
 		let mut watch_outputs = Vec::new();
 
-		macro_rules! wait_threshold_conf {
-			($source: expr, $commitment_tx: expr, $payment_hash: expr) => {
-				self.onchain_events_awaiting_threshold_conf.retain(|ref entry| {
-					if entry.height != height { return true; }
-					match entry.event {
-						OnchainEvent::HTLCUpdate { source: ref update_source, .. } => {
-							*update_source != $source
-						},
-						_ => true,
-					}
-				});
-				let entry = OnchainEventEntry {
-					txid: commitment_txid,
-					height,
-					event: OnchainEvent::HTLCUpdate { source: $source, payment_hash: $payment_hash },
-				};
-				log_trace!(logger, "Failing HTLC with payment_hash {} from {} holder commitment tx due to broadcast of transaction, waiting confirmation (at height{})", log_bytes!($payment_hash.0), $commitment_tx, entry.confirmation_threshold());
-				self.onchain_events_awaiting_threshold_conf.push(entry);
-			}
-		}
-
 		macro_rules! append_onchain_update {
 			($updates: expr, $to_watch: expr) => {
 				claim_requests = $updates.0;
@@ -1828,21 +1807,39 @@ impl<Signer: Sign> ChannelMonitorImpl<Signer> {
 		}
 
 		macro_rules! fail_dust_htlcs_after_threshold_conf {
-			($holder_tx: expr) => {
+			($holder_tx: expr, $commitment_tx: expr) => {
 				for &(ref htlc, _, ref source) in &$holder_tx.htlc_outputs {
 					if htlc.transaction_output_index.is_none() {
 						if let &Some(ref source) = source {
-							wait_threshold_conf!(source.clone(), "lastest", htlc.payment_hash.clone());
+							self.onchain_events_awaiting_threshold_conf.retain(|ref entry| {
+								if entry.height != height { return true; }
+								match entry.event {
+									OnchainEvent::HTLCUpdate { source: ref update_source, .. } => {
+										update_source != source
+									},
+									_ => true,
+								}
+							});
+							let entry = OnchainEventEntry {
+								txid: commitment_txid,
+								height,
+								event: OnchainEvent::HTLCUpdate {
+									source: source.clone(), payment_hash: htlc.payment_hash,
+								},
+							};
+							log_trace!(logger, "Failing HTLC with payment_hash {} from {} holder commitment tx due to broadcast of transaction, waiting confirmation (at height{})",
+								log_bytes!(htlc.payment_hash.0), $commitment_tx, entry.confirmation_threshold());
+							self.onchain_events_awaiting_threshold_conf.push(entry);
 						}
 					}
 				}
 			}
 		}
 
 		if is_holder_tx {
-			fail_dust_htlcs_after_threshold_conf!(self.current_holder_commitment_tx);
+			fail_dust_htlcs_after_threshold_conf!(self.current_holder_commitment_tx, "latest");
 			if let &Some(ref holder_tx) = &self.prev_holder_signed_commitment_tx {
-				fail_dust_htlcs_after_threshold_conf!(holder_tx);
+				fail_dust_htlcs_after_threshold_conf!(holder_tx, "previous");
 			}
 		}