CKB has released the next generation of public lightning network Fiber Network, a next-generation public lightning network based on Nervos CKB and off-chain channels, which can provide fast, low-cost and decentralized multi-currency support and peer-to-peer transactions for RGB ++ assets. Similar to the Bitocin Lightning Network, Fiber Network acts as a two-layer payment channel extension to conduct transactions off-chain to increase transaction speed and reduce fees, while maintaining the security and decentralization of the blockchain. Fiber Network supports multiple types of assets. In addition to CKB native tokens, any RGB ++ asset can be paid on FiberNetwork. The overall architecture of Fiber Network includes core modules such as off-chain payment channels, on-chain contracts, multi-hop routing and monitoring services. At present, Fiber Network has completed prototype development, realizing the basic functions of creating, updating and closing channels between two nodes, and also verifying the function of cross-chain with Bitcoin Lightning Network.