Layer 2 Networks

Architecture

Layer 2 networks represent a critical scaling solution for blockchain systems, functioning as a supplementary protocol built atop a base layer—typically a Layer 1 blockchain like Ethereum—to enhance transaction throughput and reduce associated costs. These systems offload transaction processing from the main chain, executing computations and finalizing state transitions independently before periodically submitting condensed transaction data or proofs back to the Layer 1 for security and settlement. Consequently, this architectural approach mitigates congestion on the primary blockchain, enabling faster and more economical interactions, particularly relevant for complex financial derivatives and high-frequency trading strategies. The design choices within Layer 2 architectures—such as rollups, state channels, and sidechains—directly influence their security assumptions, scalability limits, and compatibility with existing decentralized applications.