Skip to main content

Layer-2 Protocol

Definition

A Layer-2 protocol is a secondary framework or technology built on top of an existing blockchain, known as Layer-1, to enhance its scalability and efficiency. These protocols process transactions off the main chain, then periodically settle the aggregated results back onto the Layer-1 blockchain. Examples include optimistic rollups, zero-knowledge rollups, and sidechains, all designed to alleviate congestion and reduce transaction costs. Layer-2 solutions enable decentralized applications to handle a greater volume of users and operations.