📅 Original date posted:2016-05-20
📝 Original message:On Thu, May 19, 2016 at 04:23:28PM -0600, Nick ODell wrote:
> What if two people create transactions from oupoints within the same MMR
> tree tip, at the same time?
>
> For example, I create transaction A plus an MMR proof that MMR tip X will
> become Y.
>
> On the other side of the planet, someone else creates transaction B, plus
> an MMR proof that tip X will become Z.
>
> Can a miner who receives A and B put both into a block, without access to
> the outputs that were pruned?
The MMR proofs provided by transactions aren't proofs of *how* the MMR should
be be changd; they're just proofs that the MMR is in a certain state right now.
You're situation is just an example of a double-spend, that miners have to
detect if they don't want to create invalid blocks. Specifically, if I
understand your example correctly, they'd be rejected by the STXO set.
--
https://petertodd.org 'peter'[:-1]@petertodd.org
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Peter Todd [ARCHIVE] /
npub1m2…a2np2
2023-06-07 17:50:49
in reply to nevent1q…xphs
Author Public Key
npub1m230cem2yh3mtdzkg32qhj73uytgkyg5ylxsu083n3tpjnajxx4qqa2np2Published at
2023-06-07 17:50:49Event JSON
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"content": "📅 Original date posted:2016-05-20\n📝 Original message:On Thu, May 19, 2016 at 04:23:28PM -0600, Nick ODell wrote:\n\u003e What if two people create transactions from oupoints within the same MMR\n\u003e tree tip, at the same time?\n\u003e \n\u003e For example, I create transaction A plus an MMR proof that MMR tip X will\n\u003e become Y.\n\u003e \n\u003e On the other side of the planet, someone else creates transaction B, plus\n\u003e an MMR proof that tip X will become Z.\n\u003e \n\u003e Can a miner who receives A and B put both into a block, without access to\n\u003e the outputs that were pruned?\n\nThe MMR proofs provided by transactions aren't proofs of *how* the MMR should\nbe be changd; they're just proofs that the MMR is in a certain state right now.\nYou're situation is just an example of a double-spend, that miners have to\ndetect if they don't want to create invalid blocks. Specifically, if I\nunderstand your example correctly, they'd be rejected by the STXO set.\n\n-- \nhttps://petertodd.org 'peter'[:-1]@petertodd.org\n-------------- next part --------------\nA non-text attachment was scrubbed...\nName: signature.asc\nType: application/pgp-signature\nSize: 455 bytes\nDesc: Digital signature\nURL: \u003chttp://lists.linuxfoundation.org/pipermail/bitcoin-dev/attachments/20160520/e23f355a/attachment.sig\u003e",
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