How can hashrate be calculated exactly? It doesn’t make sense to me because how can network know how much (local) computing power miner has?

Miners are locally trying to solve a puzzle and only when they solve it they propagate a hash that represents solution to the network, right? It doesn't make sense to propagate every hash that represents a try to find the right solution to the puzzle. But without that I don't see a way how to calculate it because, by definition, the hashrate is "the number of times per second that computers on the Bitcoin network are hashing data to verify a transaction and perform the encryption that secures the network".

My guess is that hashrate is actually never a precise measurement but rather an approximation of it. But even with that in mind I can't comprehend how it is done. I hope someone can help me with this I would be very grateful 🙂

submitted by /u/deritovac
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