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Date: Wed, 01 Feb 2023 12:51:38 +0000
From: Peter Todd <pete@petertodd.org>
To: Kostas Karasavvas <kkarasavvas@gmail.com>,
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Subject: Re: [bitcoin-dev] Debate: 64 bytes in OP_RETURN VS taproot OP_FALSE
	OP_IF OP_PUSH
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On February 1, 2023 8:36:52 AM GMT, Kostas Karasavvas <kkarasavvas@gmail=
=2Ecom> wrote:
>With OP_RETURN you publish some data that are immediately visible in the
>blockchain=2E I would consider this better (more straightforward) for thi=
ngs
>like time-stamping=2E

You are incorrect=2E Time-stamps merely prove that data existed prior to s=
ome point in time=2E There is absolutely no need for anything to be publish=
ed in the blockchain to create a timestamp=2E Indeed, efficient timestamps =
don't actually publish any meaningful data: for efficiency you always combi=
ne many timestamps into a single merkle tree; a merkle tree tip digest is m=
eaningless data by itself=2E

OpenTimestamps does in fact use OpReturn rather than something more effici=
ent=2E But it does this only because the efficiency gain isn't significant =
enough for me to have gotten around to improving it=2E Reducing fee costs b=
y ~10% isn't a good use of my time=2E

>With Taproot you need to spend the utxo to make the script visible=2E Thi=
s
>seems better when you don't want the data public but you need to be able =
to
>reveal the data when the time comes=2E

If your concern is the data being public due to OpReturn vs Taproot, you a=
re confused and need to think more carefully about what exactly you are doi=
ng=2E