Layer-1 is the base layer or foundation of a blockchain network. Think of it as the underlying infrastructure that supports everything built on top of it. It defines the core rules of the network, including how transactions are processed, how new blocks are added to the chain, and how security is maintained. Examples of Layer-1 blockchains include [[Bitcoin]], [[Ethereum]], and [[Solana]]. These networks are responsible for their own security and consensus mechanisms, ensuring the integrity of the entire system. See also [[Layer-2]]