Good to know. How is it updated by radio or satellite?
Well satellite is just radio but it is broadcasted via satellite now but if shtf, it would be broadcasted over plain ham radio.
So let's say I wanted to buy a truck from a buddy using bitcoin after a catastrophic internet event and was using ham radio. how would I exchange with him?
If you exchanged with him a lot, you could first form a lightning channel so nothing even happened on main chain. That would be best. Then you could literally make transactions however, you liked. You could walk the transaction to his house if you wanted.
If you didn't you would have to broadcast that transaction over radio to other full nodes.
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