Unable to post interactive messages using postMessage

[rahulserver]

Slack.chat.postMessage({token: "a valid private token",text: "test text",  attachments: [{
          "callback_id": "tender_button",
          "attachment_type": "default",
          "actions": [
            {
              "name": "press",
              "text": "Press",
              "type": "button",
              "value": "pressed"
            }
          ]
        }], channel: req.body.channel_id})

I am trying to post an interactive message with a button based on https://api.slack.com/interactive-messages
But all I get is a simple text message which says "test text".

I wonder why isn't the button attachment appearing in the message.

[Brian LeRoux]

think you have an invalid format. try a payload like this?

let token = 'xx'
let channel = 'xxx'
let text = 'descriptive text'

let attachments = [{
  text: "Choose a game to play",
  fallback: "You are unable to choose a game",
  callback_id: "wopr_game",
  attachment_type: "default",
  actions: [{
    name: "game",
    text: "Chess",
    type: "button",
    value: "chess"
  }]
}]

await slack.chat.postMessage({token, channel, text, attachments})