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read again overtorment's article explaining how he did it.
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I can't find it. Where does it say that?
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Please read and pay attention to the whole article, there are some steps explained there.
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this are unconfirmed transactions!
šŸ‘€ #814155
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No, are confirmed. That explanation just reiterate the possibility of doing legit RBF on a confirmed tx (with less than 6 conf). That doesn't mean is always possible. It all depends of how fast the blocks are synced, but after 6 confirmations is impossible to do a RBF. You will end up in an intent of 51% attack. But that is another story.
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I'll have to look at this again, I'm still not convinced. Thanks anyway.
The sentence before what you quoted:
This is how it looks now on blockchain.info. New transaction has all chances to be included in block before the ancestor.
So this is about unconfirmed transactions
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