Block propagation delay, it looks like, is about 122 seconds in some cases. If another block is formed before the first block is completed, wouldn't this accidentally create a fork? How would this fork be resolved? Someone's transactions are bound to get lost. Example: Let's start with a block A. Say block B was just completed, and is now being propagated. If, during that delay, someone made a transaction and a new block C was created before block B reached them, wouldn't their blockchain become forked, with A->C and A->B? How does bitcoin prevent accidental forks like this?
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