ZK-rollups are the hottest thing in Ethereum right now, having seemingly appeared out of nowhere in late 2018 to fundamentally reshape the Eth2 plan to scale via sharding alone.
Zero-knowledge, or validity proof rollups, essentially perform the computations for many thousands of transactions away from Ethereum and then write a tiny cryptographic proof back to the blockchain that verifies those transactions were performed correctly. Its much faster and cheaper than using the base layer and has the potential for virtually unlimited scaling.
To an outsider, it looked like the technology went from 0 to 100 in a couple of years, but from the perspective of Polygon Miden founder Bobbin Threadbare, it doesnt seem fast enough.
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