Fix potential peer_state deadlocks in `finish_force_close_channel`#2597

Merged

TheBlueMatt merged 2 commits intolightningdevkit:mainfrom

TheBlueMatt:2023-09-finish-force-close-deadlocks

Sep 26, 2023

Commits on Sep 26, 2023

Fix potential peer_state deadlocks in `finish_force_close_channel`
TheBlueMatt
committed
Provide some test coverage of `shutdown` msgs for unfunded chans
TheBlueMatt
committed