MVP python function handler

app.py

import logging
from slack_sdk import WebClient
from slack_bolt import App, Ack, Say, Complete, Fail, BoltContext
from slack_bolt.adapter.socket_mode import SocketModeHandler

logging.basicConfig(level=logging.DEBUG)

app = App()


@app.function("hello")
def handle_function_executed_events(
    ack: Ack,
    event: dict,
    inputs: dict,
    say: Say,
):
    ack()
    assert event["bot_access_token"] == say.client.token

    user_id = inputs["user_id"]
    say(
        channel=user_id,  # sending a DM to this user
        text="Click this! Let's go!",
        blocks=[
            {
                "type": "section",
                "text": {"type": "mrkdwn", "text": "Click this!"},
                "accessory": {
                    "type": "button",
                    "text": {"type": "plain_text", "text": "Let's go!"},
                    "action_id": "button_click",
                },
            }
        ],
    )


@app.action("button_click")
def handle_button_clicks(
    ack: Ack,
    body: dict,
    context: BoltContext,
    client: WebClient,
    complete: Complete,
    fail: Fail,
):
    ack()
    assert body["bot_access_token"] == client.token

    try:
        # Since the button no longer works, we should remove it
        client.chat_update(
            channel=context.channel_id,
            ts=body["message"]["ts"],
            text="Thank you!",
        )

        # Tell the automation platform that this remote function completed
        complete({"user_id": context.actor_user_id})
    except Exception as e:
        fail(f"Failed to handle a function request (error: {e})")


if __name__ == "__main__":
    # export SLACK_APP_TOKEN=xapp-1-...
    # export SLACK_BOT_TOKEN=xoxb-...
    # python app.py
    SocketModeHandler(app).start()

manifest.yml

display_information:
  name: manifest-test-app
features:
  bot_user:
    display_name: manifest-test-bot
    always_online: true
oauth_config:
  scopes:
    bot:
      - commands
      - chat:write
settings:
  interactivity:
    is_enabled: true
  org_deploy_enabled: true
  socket_mode_enabled: true
  token_rotation_enabled: false
  hermes_app_type: remote
  function_runtime: remote
functions:
  hello:
    title: Hello
    description: Hello world!
    input_parameters:
      user_id:
        type: slack#/types/user_id
        title: User
        description: Who to send it
        is_required: true
        hint: Select a user in the workspace
        name: user_id
    output_parameters:
      user_id:
        type: slack#/types/user_id
        title: User
        description: Who to send it
        is_required: true
        hint: Select a user in the workspace
        name: user_id