layer 2 scaling
LAY-er TOO SKAYL-ing
ˈleɪər tuː ˈskeɪlɪŋListen
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Dictionary meaning
a category of blockchain scalability solutions that process transactions off the main blockchain (layer 1) while inheriting its security guarantees, enabling dramatically higher transaction throughput and lower fees than are possible on the congested base layer alone; layer 2 solutions include rollups (optimistic rollups and zero-knowledge rollups), which batch many transactions together and post compressed proofs to the main chain; state channels, which allow participants to conduct many transactions off-chain and settle only the final state on-chain; and sidechains, which are separate blockchains with their own consensus that periodically sync with the main chain; layer 2 scaling is considered essential for making blockchains like Ethereum capable of supporting mainstream adoption without sacrificing decentralisation or security
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