Improve EsploraSyncClient logging

We give some more information while reducing the log levels to make the
logging less spammy.

Author: tnull

lightning-transaction-sync/src/esplora.rs

@@ -2,7 +2,7 @@ use crate::error::{TxSyncError, InternalError};
 use crate::common::{SyncState, FilterQueue, ConfirmedTx};
 
 use lightning::util::logger::Logger;
-use lightning::{log_error, log_info, log_debug, log_trace};
+use lightning::{log_error, log_debug, log_trace};
 use lightning::chain::WatchedOutput;
 use lightning::chain::{Confirm, Filter};
 
@@ -14,6 +14,7 @@ use esplora_client::r#async::AsyncClient;
 #[cfg(not(feature = "async-interface"))]
 use esplora_client::blocking::BlockingClient;
 
+use std::time::Instant;
 use std::collections::HashSet;
 use core::ops::Deref;
 
@@ -89,7 +90,10 @@ where
 		#[cfg(feature = "async-interface")]
 		let mut sync_state = self.sync_state.lock().await;
 
-		log_info!(self.logger, "Starting transaction sync.");
+		log_trace!(self.logger, "Starting transaction sync.");
+		let start_time = Instant::now();
+		let mut num_confirmed = 0;
+		let mut num_unconfirmed = 0;
 
 		let mut tip_hash = maybe_await!(self.client.get_tip_hash())?;
 
@@ -115,7 +119,7 @@ where
 								tip_hash = check_tip_hash;
 								continue;
 							}
-
+							num_unconfirmed += unconfirmed_txs.len();
 							self.sync_unconfirmed_transactions(&mut sync_state, &confirmables, unconfirmed_txs);
 						},
 						Err(err) => {
@@ -152,6 +156,7 @@ where
 							continue;
 						}
 
+						num_confirmed += confirmed_txs.len();
 						self.sync_confirmed_transactions(
 							&mut sync_state,
 							&confirmables,
@@ -175,7 +180,8 @@ where
 				sync_state.pending_sync = false;
 			}
 		}
-		log_info!(self.logger, "Finished transaction sync.");
+		log_debug!(self.logger, "Finished transaction sync at tip {} in {}ms: {} confirmed, {} unconfirmed.",
+				tip_hash, start_time.elapsed().as_millis(), num_confirmed, num_unconfirmed);
 		Ok(())
 	}