RDN is a ticker symbol for Raiden Network Token. As a general purpose, Decentralized cryptocurrency in Raiden Network which is a off-chain solution for increase scalability of Ethereum and other ERC-20 compatible tokens. Raiden Network is aiming for 100,000 transactions/second with low transaction fee. Raiden Network is an infrastructure layer on top of Ethereum blockchain that will allow developer to interface with a simple API and use to build a scalable D-App.
In Raiden Network, the individual private transfers don’t show up on the global shared ledger and allow micropayment with RDN via µRaiden. µRaiden is the simplified zero cost of Raiden Network but still need a gas fee to open and close Ethereum channels. Raiden Network also facilitate the atomic token swaps that allows instantly exchanging token at low cost.