Layer 2 Blockchain

Architecture

Layer 2 blockchain solutions represent a paradigm shift in scaling cryptocurrency networks, primarily Ethereum, by processing transactions off-chain while maintaining security guarantees derived from the underlying Layer 1. These architectures typically involve a parent chain (Layer 1) and one or more child chains (Layer 2), enabling increased throughput and reduced transaction costs. Common implementations include rollups (optimistic and zero-knowledge), state channels, and sidechains, each offering distinct trade-offs between security, scalability, and decentralization. The design inherently aims to alleviate congestion on the main chain, facilitating more complex financial instruments like perpetual swaps and options contracts.