Cardano is an open-source, smart-contract platform that aims to provide multiple features through layered design. Its modularization will eventually allow for network delegation, sidechains, and light client data structures. Cardano uses a version of Proof-of-Stake (PoS) called Ouroboros to secure the network and manage the block production process. The network features a native token called ADA that gives stakers a claim on new issuance in proportion to their holdings and allows users to pay for transactions.