Subject: Re: [bitcoin-dev] Timelocks and Lightning on MimbleWimble

From: John Tromp <[email-masked]>
Date: Thu, 19 Sep 2019 13:16:36 +0200

> However, I believe that Lightning and similar offchain protocols are **not possible** on MimbleWimble, at least if we want to retain its "magical shrinking blockchain" property.

MimbleWimble can easily incorporate relative lock heights, in addition
to absolute lock heights. Grin and Beam have included the latter since
launch.

Grin's proposal for relative lock heights is at [1] with discussion at [2].
Based on these, Grin also has a rough design for payment channels at [3].

Beam included relative lock heights in its recent HardFork [4] and has
a payment channel design at [5].

regards,
-John

[1] https://github.com/antiochp/grin-rfcs/blob/relative_lock_heights/text/0000-relative-kernels.md
[2] https://github.com/mimblewimble/grin-rfcs/pull/19
[3] https://gist.github.com/antiochp/e54fece52dc408d738bf434a14680988
[4] https://github.com/BeamMW/beam/releases/tag/beam-3.0.5654
[5] https://docs.beam.mw/laser_beam.pdf