The first process that we will start is the running of a DA light client. Make sure to have the account funded as per the previous instructions. In this tutorial we will be using the DA network selected in the initialization section of the Roller or the default Celestia arabica testnet.
Running a DA light client enables a RollApp to publish data onchain and provide users of the RollApp with blockchain security. Once data is accepted by the DA network RollApp full nodes will be able to download the data from the namespace and confirm the resulting state root.
roller da-light-client start
💈 The data availability light node is running on your local machine!
💈 Light node endpoint: http://0.0.0.0:26659
Now that we have a DA light client running we can continue in a new terminal and start the Sequencer full node.