A sidechain, although also a layer-2, is different from a rollup in that a sidechain derives its security from its own protocols, whereas a rollup derives its security from the base layer.
Sunday, April 24, 2022
Layer 1 Vs Layer 2
Layer 1 examples:
Ethereum, Bitcoin, Avalanche
Layer 2 examples:
Chainlink, Arbitron (a rollup that seeks to solve the scalability issue), Optimism (also a rollup that seeks to solve the scalability issue)
Bitcoin halving
The Bitcoin block reward being cut in half.
This is supposed to happen roughly every 4 years.
Transaction fee VS block reward
The node that solves the blockchain riddle first gets rewarded with these two portions.
The transaction fee is paid by the party executing the transaction.
The block reward comes from the blockchain itself.
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