[perun.network member here] It would be possible using Bitcoin Virtual Channels as introduced here: https://eprint.iacr.org/2020/554 https://eprint.iacr.org/202

[perun.network member here] It would be possible using Bitcoin Virtual Channels as introduced here: https://eprint.iacr.org/2020/554 https://eprint.iacr.org/2020/554 But the implementation of this is hard.