Jerome Powell 21iQ 40TPW's avatar
Jerome Powell 21iQ 40TPW 2 months ago
I can't find any reference to their blocks being orphaned, so perhaps I'm wrong. In any case, it wasn't effective since they were the only miner doing it. I highly doubt the Chinese miners would do it. Still not sure why it's important since it wasn't effective and isn't happening anymore.
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Replies (2)

Control-Plane Capital's avatar
Control-Plane Capital . 2 months ago
It being effective or not depends on their true intent, which we don't know for sure. I'm pretty sure F2Pool (China) was already caught censoring transactions multiple times. -
Bitcoin News
Bitcoin Mining Pool F2pool Acknowledges OFAC Transaction Censorship; Backpedals After Community Backlash
F2Pool, a Bitcoin mining pool, has admitted to filtering Bitcoin transactions coming from addresses flagged by OFAC.
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Atlas21
F2Pool accused of transaction censorship and vulnerability in Bitcoin Core
Last month, developer 0xB10C discovered that the US mining pool was filtering transactions linked to OFAC-sanctioned addresses. A bug was
 It is important to me because it's an attack vector and I like to know about these things. If it's not important to you, it's all good 🤝
Control-Plane Capital's avatar
Control-Plane Capital . 2 months ago
And by the way, you maybe got confused because in a separate event, much later, Marathon did mine an invalid block in Sept 2023 due to a transaction-ordering error — unrelated to OFAC filtering and years after they'd stopped the "clean block" trial.
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