f explicit log on errors

Author: TheBlueMatt

lightning/src/chain/channelmonitor.rs

@@ -1803,6 +1803,8 @@ impl<Signer: Sign> ChannelMonitorImpl<Signer> {
 					log_trace!(logger, "Updating ChannelMonitor with latest holder commitment transaction info");
 					if self.lockdown_from_offchain { panic!(); }
 					if let Err(e) = self.provide_latest_holder_commitment_tx(commitment_tx.clone(), htlc_outputs.clone()) {
+						log_error!(logger, "Providing latest holder commitment transaction failed/was refused:");
+						log_error!(logger, "    {}", e.0);
 						ret = Err(e);
 					}
 				}
@@ -1817,6 +1819,8 @@ impl<Signer: Sign> ChannelMonitorImpl<Signer> {
 				ChannelMonitorUpdateStep::CommitmentSecret { idx, secret } => {
 					log_trace!(logger, "Updating ChannelMonitor with commitment secret");
 					if let Err(e) = self.provide_secret(*idx, *secret) {
+						log_error!(logger, "Providing latest counterparty commitment secret failed/was refused:");
+						log_error!(logger, "    {}", e.0);
 						ret = Err(e);
 					}
 				},