imBack payload to resume waterfall - node.js

Question

I have a button on my chatbot which once being clicked,
it should resume the dialog to the next step of the waterfall dialog.
I cannot find a payload value that will do that, I tried action?resume and action?next.
[
(session, args, next) => {
let msg = new builder.Message().text('welcome')
.attachments([new builder.HeroCard(session)
.buttons([builder.CardAction.imBack(session, 'next', 'next')])])
session.send(msg);
}, (session, args, next) => {
//I'm here if button clicked - if not, handle somewhere else
}
]

Answer 1

I guess you want to use a hero card to prompt something, i.e. wait for the user to click some button on hero card. Here is the code sample
bot.dialog("/", function(session) {
session.beginDialog("test");
});
bot.dialog("test", [
function(session) {
// create a hero card
let msg = new builder.Message()
.text("welcome")
.attachments([
new builder.HeroCard(session).buttons([
builder.CardAction.imBack(session, "next", "next")
])
]);
// prompt user using hero card
builder.Prompts.text(session, msg);
},
function(session, result) {
// if user clicked some button, then do someting useful
if (result.response === "next") {
// do something, like calling another dialog
} else { // user didn't clicked button, so prompt the hero card again
session.send("please click a button");
session.replaceDialog("test");
}
}
]);