`fetchInstallation` never called and bot doesn't react to messages?

Description

I am trying to set up a Slack Bolt app using the OAuth mechanism as described in https://slack.dev/bolt-js/concepts#authenticating-oauth but it seems like the authentication never finishes.

My implementation looks like this

export class SlackService {
  slackApp: App;

  constructor() {
    this.slackApp = new App({
      signingSecret: process.env.SLACK_SIGNING_SECRET,
      clientId: process.env.SLACK_CLIENT_ID,
      clientSecret: process.env.SLACK_CLIENT_SECRET,
      stateSecret: process.env.SLACK_STATE_SECRET,
      scopes: [
        'chat:write',
        'channels:read',
        'channels:history',
        'im:read',
        'im:write',
        'incoming-webhook',
      ],
      logLevel: LogLevel.DEBUG,
      installationStore: {
        storeInstallation: async (installation) => {
          console.log('store installation');
          return await database.set(installation.team.id, installation);
        },
        fetchInstallation: async (InstallQuery) => {
           console.log('fetch Installation');
           return await database.get(InstallQuery.teamId);
        },
      },
    });

    this.bootstrap();
  }

  async bootstrap() {
    await this.slackApp.start(process.env.SLACK_APP_PORT);
    this.slackApp.message(':wave:', async ({ message, say }) => {
      console.log('got message');
      await say(`Hello, <@${message.user}>`);
    });
    this.slackApp.client.chat.postMessage({...});
    console.log('⚡️ Slack app is running!');
  }
}

The part with storing the installation works, so store installation shows up in the console once I finish the installation. Also the data that I get in store installation seems valid, I tested the webhook url and it works fine when I just use it in my HTTP requests.

But what’s weird is that fetchInstallation never gets called, and my app never reacts to the :wave: message. The line this.slackApp.client.chat.postMessage({...}); throws an error:

(node:67243) UnhandledPromiseRejectionWarning: Error: An API error occurred: not_authed

Is there something I forgot to add? Unfortunately I can’t find any more information in the docs.

What type of issue is this? (place an x in one of the [ ])

• bug
• enhancement (feature request)
• question
• documentation related
• example code related
• testing related
• discussion

Requirements (place an x in each of the [ ])

• I’ve read and understood the Contributing guidelines and have done my best effort to follow them.
• I’ve read and agree to the Code of Conduct.
• I’ve searched for any related issues and avoided creating a duplicate issue.

[seratch]

@Evilweed This may be a bit confusing but the slackApp.client does not hold a token (even when you pass a bot token in App constructor). Thus, you need to pass token as an argument in the chat.postMessage method call this way:

await this.slackApp.client.chat.postMessage({
  token: process.env.SLACK_BOT_TOKEN,
  channel: "#random", // using a channel ID is better
  text: "Hi there!"
})

In the case of @zwenza’s app, installationStore does not work outside App’s event listeners. If the app needs to post a message when bootstrapping, picking one bot token up to post the message would be the way to go.

I think this comment answered both questions. Let me close this issue now. If you have any further questions, please feel free to write in here or create a new question type issue.

[TheJimFactor]

Just because it wasn’t immediatly obvious where fetchInstallation could be called from I wrote an example script that uses postMessage and fetchInstallation

app.command('/testcommand', async({ command, ack, respond }) =>{
  const installation = await app.receiver.installer.installationStore.fetchInstallation({teamId:command.team_id})
  await app.client.chat.postMessage({
    token:installation.bot.token,
    channel:'channelidhere',
    text:`<@${command.user_id}> used the /testcommand with text: ${command.text}!`
  })

}