Cross-Layer Consensus refers to the process by which different layers of a blockchain network agree on the state of the network and the validity of transactions. This concept is particularly relevant in multi-layered systems where distinct layers handle specific roles, such as a base layer for security and a secondary layer for scalability or speed.In such systems, achieving consensus across layers ensures that all participants have a unified view of the network’s state. It helps to prevent issues like double-spending and ensures that transactions are accurately recorded across all layers.For instance, in a two-layer system, the base layer may manage the primary blockchain operations, while a secondary layer might handle off-chain transactions. Cross-Layer Consensus mechanisms allow these layers to communicate effectively, ensuring that updates in one layer are recognized and validated by the other. This synchronization can enhance performance without sacrificing security, making the system more efficient and user-friendly.