Some circumstantial evidence supporting the claim of Antpool actively using ASICBOOST

edit:

is this the smoking gun and final proof?: https://www.reddit.com/r/Bitcoin/comments/63yo27/some_circumstantial_evidence_supporting_the_claim/dfy5o65/?utm_content=permalink&utm_medium=front&utm_source=reddit&utm_name=Bitcoin

can someone verify this?

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A short list of the evidence I was able to quickly put together:

  • Existence of ASICBOOST was just confirmed by Bitmain them self. "Our ASIC chips, like those of some other manufacturers, have a circuit design that supports ASICBOOST" – It's very costly to develop and even costlier to put it in every single ASIC. It makes no sense whatsoever if you're not intending to use it.

  • "Bitmain has tested ASICBOOST on the Testnet but has never used ASICBOOST on the mainnet" (Source) _ For what reason was it tested on testnet if not for actual use?

  • "Bitmain holds the ASICBOOST patent in China. We can legally use it in our own mining farms in China to profit from it and sell the cloud mining contracts to the public. This, however profitable, is not something we would do for the greater good of Bitcoin." _ Literally every single piece of evidence we have directly contradicts this. Words are cheap…

  • https://twitter.com/AaronvanW/status/850060132264407041 (Jihan indirectly confirms that they are using ASICBOOST on weibo)

  • https://twitter.com/CollinCrypto/status/849802945294217217 (Jihan indirectly confirms that they are using it on twitter, then deletes tweets)

  • Empty blocks indicate use of ASICBOOST. Antpool is mining lots of empty blocks

  • Weird transaction shuffling is necessary for ASICBOOST. Bitmain engages in weird transaction shuffling: https://twitter.com/ElectrumWallet/status/849974808259559425 https://twitter.com/ElectrumWallet/status/850195695302696960

  • someone actually found the stratum command used to activate ASICBOOST on antminers pointed to Antpool some 9 months ago: https://archive.fo/Ok3SJ

  • segwit (unintentionally) breaks the covert form of ASCIBOOST. Bitmain oposes segwit.

  • SegWit2MB, BU and Extension Blocks does not break covert ASICBOOST. Bitmain supports all of those proposals.

  • Greg's fix blocks only covert ASICBOOST – it does literally nothing else. ANY miner not using covert ASICBOOST profits from such a fix since it prevents the competition from secretly using it. Bitmain opposes the fix.

  • "We have tried to calculate the amount of money that the Chinese have invested in mining, we estimate it to be in the hundreds of millions of dollars. Even with free electricity we cannot see how they will ever get this money back. Either they don’t know what they are doing, but that is not very likely at this scale or they have some secret advantage that we don’t know about." – Sam Cole, KNC CEO

This is anything but exhaustive. Feel free to provide more.

ah, another piece of useful information:

https://twitter.com/GigaBitcoin/status/849860111635853312 https://twitter.com/ElectrumWallet/status/849864151748968448

(explanations why ASICBOOST is an attack and NOT an optimization)

submitted by /u/viajero_loco
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