Websockets mode with custom receiver

Description

I was testing out socket mode with an existing bot but was met with dispatch_failed errors. Turns out this was because the bot was using a custom express receiver, which takes the place of SocketModeReceiver in the framework code. I don’t think I encountered any mention of this while I was reading about socket mode… Or if this is mentioned somewhere, I’d recommend calling this out somewhere a little more discoverable.

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.

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Bug Report

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Reproducible in:

package version: 3.0.0

node version: 14

OS version(s):

Steps to reproduce:

1. Go back in time and create a bolt app with a custom express receiver before websocket mode was released
2. migrate to Bolt v3
3. enable socket mode
4. confusion

Expected result:

It would be cool if the bolt framework could somehow tell you that the express receiver provided wasn’t a correct implementation of a websocket receiver if App is initialized with socketMode flipped on. Not sure of the feasibility of this though.

I had turned on developerMode at some point hoping to see some kind of error message but saw none. It wasn’t until I actually got socket mode working that I realized that I was supposed to get additional socket-related logs.

Actual result:

What actually happened

Attachments:

Logs, screenshots, screencast, sample project, funny gif, etc.

[smoneta]

In the bolt js documentation it mentions a code for SocketModeReceiver but does not provide an example for a custom route… any change to add one? . I tested the code there but it fails to start saying that :

const socket_mode = new SocketModeReceiver({
                    ^

TypeError: SocketModeReceiver is not a constructor

[seratch]

To track the progress in a single place, let us close this issue now. Please check #866 for this topic.