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Sidechains

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A sidechain is a separate blockchain which runs in parallel to Ethereum mainnet and operates independently. It has its own consensus algorithm (e.g. Proof of Authority, Delegated proof-of-stake, Byzantine fault tolerance). It is connected to mainnet by a two-way bridge.

Prerequisites

You should have a good understanding of all the foundational topics and a high-level understanding of Ethereum scaling.

Pros and cons

ProsCons
Established technology.Less decentralized.
Supports general computation, EVM compatibility.Uses a separate consensus mechanism. Not secured by layer 1 (so technically it’s not layer 2).
A quorum of sidechain validators can commit fraud.

Use Sidechains

Multiple projects provide implementations of sidechains that you can integrate into your dapps:

Further reading

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