Slack Actions API not sending entire payload - slack

Question

I'm building a slack app using the slack Bolt API, and I want to open modals from my App's home page when a button on the home page is clicked.
Here's the relevant bit of the action listener that is connected to the button:
app.action("follow-users-button", async ({ ack, payload, client }) => {
await ack();
console.log("app_home opening keyusermodal");
// await block_actions.unfollowKeyuser(action);
console.log("payload = " + JSON.stringify(payload));
await client.views.open({
trigger_id: payload.trigger_id,
Here's what I get on my terminal when I click that button:
payload = {"action_id":"follow-users-button","block_id":"2JW","text":{"type":"plain_text","text":"Users","emoji":true},"value":"click_me_123","type":"button","action_ts":"1642280065.631917"}
[ERROR] bolt-app missing required field: trigger_id
The JSON there is the action payload.
However, according to the Slack docs, this payload should be much larger. Here's the sample payload from Slack's Block Kit Builder:
{
"type": "block_actions",
"user": {
"id": "U02NF0A8D9T",
"username": "person",
"name": "person",
"team_id": "T02NTJ0UDP3"
},
"api_app_id": "A02",
"token": "Shh_its_a_seekrit",
"container": {
"type": "message",
"text": "The contents of the original message where the action originated"
},
"trigger_id": "12466734323.1395872398",
"team": {
"id": "T02NTJ0UDK3",
"domain": "4most-r637660"
},
"enterprise": null,
"is_enterprise_install": false,
"state": {
"values": {}
},
"response_url": "https://www.postresponsestome.com/T123567/1509734234",
"actions": [
{
"type": "button",
"block_id": "QdL",
"action_id": "button-action",
"text": {
"type": "plain_text",
"text": "Click Me",
"emoji": true
},
"value": "click_me_123",
"action_ts": "1642279809.506518"
}
]
}
As you can see, I'm only receiving the actions element in my payload. Where's the rest of it? Why isn't it coming over? I need the trigger_id to open a modal (not having it causes the error), and getting things like user_id would be extremely helpful for my app.
Thanks in advance!

Answer 1

When working with the Bolt JS framework, the expected way to parse the action payload to get the trigger id is body.trigger_id.