Which network is a smart layer?

Could you elaborate on what you mean by a "smart layer" in the context of cryptocurrency and finance? Are you referring to a specific technology or protocol that operates on top of an existing blockchain network, adding additional functionality or capabilities? Or perhaps you're referring to a decentralized application (dApp) that utilizes a blockchain network's smart contract capabilities? Clarifying this will help me provide a more accurate description of which network could be considered a "smart layer.