Cannot read property "token" of undefined when using new Bolt auth

Description

I am using the new standard Bolt auth process on bolt version "^2.1.1" to distribute my app, here is my code:

const app = new App({
  signingSecret: config.slack.signingSecret,
  clientId: config.slack.clientId,
  clientSecret: config.slack.clientSecret,
  stateSecret: "a-very-cool-secret",
  scopes: ["incoming-webhook", "commands"],
  installationStore: {
    storeInstallation: (installation) => {
      return db.collection("auth").doc(installation.team.id).set(installation);
    },
    fetchInstallation: (InstallQuery) => {
      return db.collection("auth").doc(InstallQuery.teamId);
    },
  },

but am getting the following error when trying to hit the app_home_opened event:

[WARN]  bolt-app Authorization of incoming event did not succeed. No listeners will be called.
{ Error: Cannot read property 'token' of undefined
    at new AuthorizationError (src/node_modules/@slack/oauth/dist/errors.js:70:28)
    at InstallProvider.<anonymous> (src/node_modules/@slack/oauth/dist/index.js:114:31)
    at step (src/node_modules/@slack/oauth/dist/index.js:33:23)
    at Object.next (src/node_modules/@slack/oauth/dist/index.js:14:53)
    at fulfilled (src/node_modules/@slack/oauth/dist/index.js:5:58)
    at process._tickCallback (internal/process/next_tick.js:68:7) code: 'slack_oauth_installer_authorization_error' }

This is on my dev workspace where I was previously passing in a token argument to my App constructor. I am getting a 404 when hitting the “Add App to Slack” button after passing it the /slack/oauth_redirect endpoint and I assume that is why.

I have two misunderstandings that might be creating this issue:

1. How do I generate/where do I get the stateSecret? It seems like it’s just a random string I can make up that is used in the hashing of secrets but I am not certain.
2. Shouldn’t the fetchInstallation be asynchronous? Any DB call would return a Promise, so should we actually return a Promise (as I’m doing here) or the actual document?

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

• bug
• enhancement (feature request)
• [x ] question
• documentation 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.

[rosgoo]

Thanks @stevengill! that’s helpful, I’ll make my two functions asynchronous. And sorry, should have specified. I’m using version "^2.1.1", updating the original post to reflect that. Let me try again with the newest version.

[rosgoo]

sounds good, thanks!