The Dai Card application, a simple browser-hosted wallet, allows users to transact instantly, cheaply, and securely in Dai. Similar to a physical debit card, users “top up” their Dai Card balance by depositing Eth (or Dai) directly to their Dai Card address, which gets instantly swapped into Dai and represented as USD in-channel. Users can withdraw their funds directly into Eth without needing to pay gas, dramatically simplifying the “cash out” experience. Because the Dai Card runs on the Ethereum mainnet in payment channels, user funds are always self-custodied and can be exited regardless of the hub’s availability. Integrating Connext’s system into custom applications is also simple, requiring only a basic knowledge of Javascript.