DoubleZero Foundation has raised $28 million in a token round to build a global fiber network for blockchains.The organization aims to provide a dedicated network infrastructure to improve the performance of decentralized systems like blockchains.The testnet has been launched in several cities globally, and the mainnet is scheduled for launch later this year.DoubleZero will use the funding to hire key positions and support the launch of the public mainnet in the future.