[bitcoin-dev] A Better MMR Definition

Bram Cohen bram at bittorrent.com
Fri Feb 24 03:02:36 UTC 2017


On Thu, Feb 23, 2017 at 6:58 PM, Peter Todd <pete at petertodd.org> wrote:

>
> So to be clear, do you agree or disagree with me that you *can* extract a
> compact proof from a MMR that a given output is unspent?
>

After wading through your logic on how updates are done, I agree that that
can be done, but apples to apples compact proofs can also be done in a utxo
commitment, and proofs of the validity of updates can be done in a utxo
commitment, so there isn't any performance advantage to all that extra
complexity.
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