Bank is a sample application that uses the vanadium principal service to enable applications to obtain a user identity for authentication. The app currently only works on android and with go build support.
The customer obtains a user identity through the principal service and then talks to the bank to deposit/withdraw some money. The bank will only accept transactions from customers that have a user identity.
$MOJO_DIR/src/mojo/devtools/common/mojo_run mojo:customer --android