Sunday, April 24, 2022

Sidechain Vs Rollup

 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.



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)





Current proof of stake chains

avalanche

solano

polygon 

polkadot

terra


Longest chain rule

Two types of blockchain attacks

1.  Sybil attack

2.  51% attack



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.