Yes, payment channels require 2-of-2 utxos, the simplest form of multi-sig. Other nodes cannot recognize these utxos, but will recognize the NRD kernels that can arise in channel closure.
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Couldn’t threshold Schnorr signing be used to expand the 2 of 2 to larger groups?
this is the way.. now if we could pop the kernel..
I saw on the news letter there is such a bounty for a messaging program. Why has this not been done yet?
Any reason not to just use MPC? It would allow multisig usage with no changes to the protocol.