In Lightning the to_self_delay parameter is influenced by your peer. When a node opens a channel to yours, they promote the minimal they will settle for.

On Core-Lightning you’ll be able to set the minimal worth to request from friends with the watchtime-blocks choice. You’ll be able to be taught extra about this feature within the lightningd-config manpage or on the on-line documentation. By default this worth is about to 144 (1 day).

The worth of your personal to_self_delay will rely in your peer. The utmost worth a Core-Lightning node will settle for might be modified utilizing the max-locktime-blocks choice (identical manpage as above). By default this worth is about to 2016 (2 weeks).

Simply to emphasise: the default worth for the our_to_self_delay on Core-Lightning shouldn’t be 600. You have to have picked this from one in all your channels, the place your peer requested a minimal to_self_delay of 600. Since that is beneath the 2016 cap set by default, your Core-Lightning accepted to create a channel with this parameter.