Layer 2 Smart Contracts
Layer 2 smart contracts are self-executing agreements deployed on secondary scaling solutions built atop base blockchains (Layer 1), such as Ethereum. They leverage technologies like rollups, sidechains, or state channels to process transactions off-chain, bundling them before settling on the main chain for security. This approach significantly reduces gas fees and increases transaction throughput while inheriting the underlying blockchain's decentralization and security guarantees.
Developers should learn and use Layer 2 smart contracts when building decentralized applications (dApps) that require high scalability and low transaction costs, such as DeFi protocols, NFT marketplaces, or gaming platforms on Ethereum. They are essential for overcoming the limitations of Layer 1 blockchains, like network congestion and high fees, enabling mass adoption by making dApps more efficient and user-friendly without sacrificing security.