On March 13th, StarkNet will hold StarkCity in London, and the ZK-driven Bitcoin restaking project Chakra will announce a major collaboration plan.It is reported that Chakra is the world's first Bitcoin restaking protocol based on zero-knowledge proof (ZKP), aiming to enhance the utility of the Bitcoin network through ZKP and achieve universal restaking throughout the entire chain. As the first Madara use case to be launched, Chakra not only expands the application scenarios of the Starknet ecosystem, but also provides new channels for Bitcoin holders and users to enter the Starknet ecosystem.Chakra was introduced by Starknet officials at the StarkCity event at ETH Denver on February 28th.Francis from the Starknet Foundation stated that Bitcoin has a greater advantage in proof-of-stake security compared to Ethereum, with a more decentralized token distribution and globally distributed nodes. These characteristics make the services provided by the Bitcoin network more decentralized and secure.