peer_control: move open_command up to where channeld can get it,

also include a method for finding a pending/available open_command
for a channel

lightningd/peer_control.c

@@ -74,17 +74,6 @@ struct close_command {
 	bool force;
 };
 
-struct open_command {
-	/* Inside struct lightningd open_commands. */
-	struct list_node list;
-	/* Command structure. This is the parent of the open command. */
-	struct command *cmd;
-	/* Channel being opened. */
-	struct channel *channel;
-	/* PSBT in flight */
-	struct wally_psbt *psbt;
-};
-
 static void destroy_peer(struct peer *peer)
 {
 	list_del_from(&peer->ld->peers, &peer->list);
@@ -367,7 +356,7 @@ destroy_open_command(struct open_command *oc)
 }
 
 struct open_command *find_open_command(struct lightningd *ld,
-				       struct channel *channel)
+				       const struct channel *channel)
 {
 	struct open_command *oc, *n;
 

lightningd/peer_control.h

@@ -52,6 +52,15 @@ struct peer {
 #endif
 };
 
+struct open_command {
+	/* Inside struct lightningd open_commands. */
+	struct list_node list;
+	/* Command structure. This is the parent of the open command. */
+	struct command *cmd;
+	/* Channel being opened. */
+	struct channel *channel;
+};
+
 struct peer *find_peer_by_dbid(struct lightningd *ld, u64 dbid);
 
 struct peer *new_peer(struct lightningd *ld, u64 dbid,
@@ -92,7 +101,7 @@ struct amount_msat channel_amount_receivable(const struct channel *channel);
 
 /* Find the open command that was registered for this channel */
 struct open_command *find_open_command(struct lightningd *ld,
-				       struct channel *channel);
+				       const struct channel *channel);
 
 /* Save an `openchannel_signed` command */
 void register_open_command(struct lightningd *ld,