How Is a “Sidechain” Different from the Main Blockchain?
A sidechain is a separate, independent blockchain that is connected to the main blockchain (parent chain) by a two-way peg. This peg allows assets, typically the parent chain's native currency, to be transferred back and forth between the two chains.
Sidechains are often used to test new features or provide greater scalability by offloading transaction processing from the main chain, without compromising the main chain's security.
Glossar
Main Blockchain
Architecture ⎊ The Main Blockchain refers to the primary, canonical distributed ledger network upon which a cryptocurrency, such as Bitcoin, is fundamentally secured and transacted.
Sidechain
Architecture ⎊ A Sidechain represents a distinct blockchain network that operates independently but is cryptographically linked to a main chain, typically through a two-way peg mechanism allowing assets to be transferred between the two ledgers.