I thought we need changes to #bitcoin to make #eltoo work in #lightning, like SIGHASH_NOINPUT or similar? Also what is APO, Google doesn't help me. I guess it's the answer to my first question πŸ˜…

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APO = anyprevout which is an updated version of noinput https://bitcoinops.org/en/topics/sighash_anyprevout/

SIGHASH-NOINPUT got renamed to sighash-anyonecanpay or APO for short