@startuml nudges
skinparam sequence {
    ArrowColor DeepSkyBlue
    ActorBorderColor DeepSkyBlue
    LifeLineBorderColor blue
    LifeLineBackgroundColor #A9DCDF

    ParticipantBorderColor DeepSkyBlue
    ParticipantBackgroundColor DodgerBlue
}

title Fetching nudges
note left of SDK: T10
SDK -> Backend: GET /?dispatched_at=<T10>
Backend --> SDK: [NUDGE_T20, NUDGE_T30, NUDGE_T40]



note left of SDK: T20
SDK -> SDK: show NUDGE_T20

... user leaves the page and come back \n some minutes later ...

note left of SDK: T40
SDK -> Backend: GET /?dispatched_at=< <font color="red">¿¿T20 or T40??</font> >
Backend --> SDK: [<font color="red">?????</font>]

@enduml