f only print success on success

Author: TheBlueMatt

lightning/src/chain/chainmonitor.rs

@@ -281,8 +281,9 @@ where C::Target: chain::Filter,
 		if let Err(e) = self.persister.persist_new_channel(funding_outpoint, &monitor) {
 			log_error!(self.logger, "Failed to persist new channel data");
 			return Err(e);
+		} else {
+			log_trace!(self.logger, "Finished persisting new Channel Monitor for channel {}", log_bytes!(funding_txo.0.to_channel_id()[..]));
 		}
-		log_trace!(self.logger, "Finished persisting new Channel Monitor for channel {}", log_bytes!(funding_txo.0.to_channel_id()[..]));
 		if let Some(ref chain_source) = self.chain_source {
 			monitor.load_outputs_to_watch(chain_source);
 		}
@@ -318,8 +319,9 @@ where C::Target: chain::Filter,
 				let persist_res = self.persister.update_persisted_channel(funding_txo, &update, monitor);
 				if let Err(ref e) = persist_res {
 					log_error!(self.logger, "Failed to persist channel monitor update: {:?}", e);
+				} else {
+					log_trace!(self.logger, "Finished persisting Channel Monitor Update for channel {}", log_funding_info!(monitor));
 				}
-				log_trace!(self.logger, "Finished persisting Channel Monitor Update for channel {}", log_funding_info!(monitor));
 				if update_res.is_err() {
 					Err(ChannelMonitorUpdateErr::PermanentFailure)
 				} else {