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is it possible to send transactions back and forth between all 3 address types (legacy, segwit, native segwit-bech32)? Yes, of course. It's totally normal at protocol level. Just like what Murch had said: There are no restrictions on sending from any type of outputs to any address type in the Bitcoin protocol The ability to limit where the "unlocked&...


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There is the annex, leaf version, ext_flag, OP_SUCCESS, unknown pubkey types and you could probably include the existing witness version too. I believe that list is exhaustive. The ext_flag isn't so much an extension mechanism in itself; more a structure that permits safely reusing the sighashing code (as opposed to needing a new tag or other mechanism for ...


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