Kadena (KDA) is a digital currency used for compute payments on the Kadena public chain. It serves as the transaction fee and mining reward within the network. Kadena aims to unite public applications, private blockchains, and interoperable chains, providing a high-bandwidth computer infrastructure. Smart contracts on Kadena are written in Pact, a user-friendly and verifiable language. KDA is used for transactions, staking, and accessing services within the Kadena ecosystem. The project was created by blockchain and technology experts, Will Martino and Stuart Popejoy, to address scalability and security challenges in the industry.