TLDR: @Boundless_xyz has launched the mainnet beta version, with the core feature being "The Signal" The so-called 'The Signal', in plain language, refers to the implementation of cross chain interoperability of any chain based on Boundless zk technology. At present, cross chain communication between different chains often relies on trusted third parties (such as multi signature and lightweight clients) to ensure security. The Signal generates a proof for each final block and broadcasts it to other chains for use; For cross chain transactions, the target chain only needs to verify this proof from the source chain to determine that the cross chain transaction has actually occurred on the source chain; vice versa. The Signal will first be launched on Ethereum and will gradually expand to ecological chains such as @ base, @ LineaBuild, @ Optimism, @ build_on_bob, etc. The security and effectiveness of all cross chain transactions are guaranteed by 'The Signal' through zero knowledge proof. From point to surface, Boundless weaves an efficient and secure cross chain interoperability network for different ecological chains.