CHAI is an ERC20 token that’s like DAI which earns interest from Maker’s Dai Savings Rate (DSR), currently 8% as of writing this. It’s a lot like how cDAI represents DAI supplied to Compound plus interest. Chai.sol, the token’s smart contact, deposits your DAI into the DSR and issues you CHAI tokens which can be stored, transferred, traded, and later redeemed for the underlying DAI plus any interest earned. As an added bonus, it’s also supports gas-less token transfers. The project, smart contract, and interface was created by Martin Lundfall, Lucas Vogelsang, and Lev Livnev. Also, Abbey Titcomb made the lovely mug pixel art. Deployed on December 1st, 2019, you can now pay friends, grow your savings, trade, etc. while still earning interest on your DAI.