There was also talk of cashu-token backed lightning channels. I don't think it matters to the ln network how the channels are secured, it only matters to the first and last node in the ln route whether they get paid.
New blog post: https://petertodd.org/2025/fake-channels-and-rgb-lightning
tl;dr: the fact that you can route over fake channels on lightning, means implementing Lightning on top of client-side-validated tokens like RGB is much easier than you'd expect.
Probably not a new idea. But someone's gotta write it down...
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