do we even need the old chain? Do they not include all the information and proof? Nobody has a calendar of when the week originally started no? We just all know it its monday because we always kept track and are confident monday is actually monday.
because a commitment-proof requires one to have and process the entire UTXO database. Which excludes thin clients from being used.
Ok but that isn't a reason against keeping a rolling proof of the chain instead of all the history, in theory?
it is, provided you think we should allow SPV wallets to exist that are not forced to just go on trust.
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