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Just curious - excuse my ignorance - wouldn't there be a high level of chance involved in that you might actually win, that would cause the cost to rocket way up for you to succeed in that double spend? Eg you'd have to keep trying before you got a hash that would cause you to need to actually spend a lot more.

This is for 1h of compute in the calculation so would you not actually need to run for a very long time, and also be spending in each and every one of those blocks?

Again sorry for my ignorance - hoping for some insight.




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