sipa changed the topic of #bitcoin-wizards to: This channel is for discussing theoretical ideas with regard to cryptocurrencies, not about short-term Bitcoin development | http://bitcoin.ninja/ | This channel is logged. | For logs and more information, visit http://bitcoin.ninja
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<instagibbs>
kim___, #bitcoin please
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<igno_peverell>
curious about BIP152: what stops an attacker from messing with the compact block on relay and force receivers to lookup for nothing?
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<instagibbs>
igno_peverell, you mean the computation to check mempool and attempt assembly?
<igno_peverell>
instagibbs: correct, and request from peers when not found
<igno_peverell>
just checking if I'm missing something
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<instagibbs>
whatever list of missing transactions they give you, if they give it and it doesn't reconstruct, you ban. Simple withholding is already worse in legacy relay, and can be mitigated in other ways.
<instagibbs>
i.e., you give preference to peers that helped you complete blocks, you ask more than 1 peer to help finish CB sketches, etc
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<igno_peverell>
instagibbs: okay thanks!
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<gmaxwell>
instagibbs: also the actual reconstruction work alone is very fast, more so than many other things a peer already can ask us to do.
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