Google Apps Script + EventSub

BarryCarlyon · March 25, 2021, 1:43pm

You didn’t echo out the challenge so.

Twitch either got a non 200 code when it POST-ed to you
Or when it POST-ed to you you didn’t echo back the challenge.

You can see in my NodeJS example here

BarryCarlyon/twitch_misc/blob/main/eventsub/handlers/nodejs/receive.js#L83-L90


if (req.headers['twitch-eventsub-message-type'] == 'webhook_callback_verification') {
    // it's a another check for if it's a challenge request
    if (req.body.hasOwnProperty('challenge')) {
    // we can validate the signature here so we'll do that
        if (req.twitch_hex == req.twitch_signature) {
            console.log('Got a challenge, return the challenge');
            res.send(encodeURIComponent(req.body.challenge));
            return;

I fetch the challenge from the incoming POST request and just echo it out.

You are getting webhook_callback_verification_failed as your callback is not echoing the vierification challenge correctly.

You can even use the twitch-cli to test your endpoint to see if it replies correctly to verification requests

github.com

twitchdev/twitch-cli/blob/main/docs/event.md#verify-subscription

# Events

- [Events](#events)
  - [Description](#description)
  - [Trigger](#trigger)
  - [Retrigger](#retrigger)
  - [Verify-Subscription](#verify-subscription)

## Description

The `event` product contains commands to trigger mock events for local webhook testing or migration.

## Trigger

Used to either create or send mock events for use with local webhooks testing.

**Args**

| Argument              | Description                                                                                                |
|-----------------------|------------------------------------------------------------------------------------------------------------|

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