splice: Add log messages

Add verbose log messages around the new TLV fields to help in interop efforts.

Author: ddustin

channeld/channeld.c

@@ -5394,14 +5394,45 @@ static void peer_reconnect(struct peer *peer,
 			send_tlvs->your_last_funding_locked_txid = &peer->channel->funding.txid;
 
 		send_tlvs->my_current_funding_locked_txid = &peer->channel->funding.txid;
+		status_debug("Setting send_tlvs->my_current_funding_locked_txid"
+			     " to %s",
+			     fmt_bitcoin_txid(tmpctx,
+			     		      &peer->channel->funding.txid));
 
 		for (size_t i = 0; i < tal_count(peer->splice_state->inflights); i++) {
 			struct inflight *inflight = peer->splice_state->inflights[i];
-			if (inflight->locked_scid)
+			if (inflight->locked_scid) {
 				send_tlvs->my_current_funding_locked_txid = &inflight->outpoint.txid;
+				status_debug("Overriding send_tlvs->my_current_"
+					     "funding_locked_txid to %s because"
+					     " inflight is locked to scid %s",
+					     fmt_bitcoin_txid(tmpctx,
+					     		      &inflight->outpoint.txid),
+					     fmt_short_channel_id(tmpctx,
+					     			  *inflight->locked_scid));
+			}
 		}
 	}
 
+	status_debug("Sending channel_reestablish with"
+		     " next_funding_tx_id: %s,"
+		     " your_last_funding_locked: %s,"
+		     " my_current_funding_locked: %s,"
+		     " next_local_commit_number: %"PRIu64",",
+		     send_tlvs && send_tlvs->next_funding
+		     	? fmt_bitcoin_txid(tmpctx,
+		     			   send_tlvs->next_funding)
+		     	: "NULL",
+		     send_tlvs && send_tlvs->your_last_funding_locked_txid
+		     	? fmt_bitcoin_txid(tmpctx,
+		     			   send_tlvs->your_last_funding_locked_txid)
+		     	: "NULL",
+		     send_tlvs && send_tlvs->my_current_funding_locked_txid
+		     	? fmt_bitcoin_txid(tmpctx,
+		     			   send_tlvs->my_current_funding_locked_txid)
+		     	: "NULL",
+		     send_next_commitment_number);
+
 	/* BOLT #2:
 	 *
 	 *   - upon reconnection: