Issues serving multiple Actions project using the same webhook

[j-a-h-i-r]

My current setup is like this. I have multiple actions project on Google Actions. They are all using the Actions SDK and using the same fulfillment webhook.

I am using account linking (with Google Sign In) on the actions projects. The guideline here initializes the actionssdk with a static clientId like this:

const app = actionssdk({
  // REPLACE THE PLACEHOLDER WITH THE CLIENT_ID OF YOUR ACTIONS PROJECT
  clientId: CLIENT_ID,
});

But for my use case, I have to dynamically set the clientId based the the projectId of the actions project. I can extract the projectId inside the actions.intent.MAIN intent and retrieve the stored clientId from DB there.

What is the best way to achieve this?

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What I have tried additionally:

I initialized the actionssdk with a dummy clientId like this:

const app = actionssdk({
    clientId: 'placeholder.apps.googleusercontent.com'
})

After that, inside actions.intent.MAIN intent, I've replaced it with an actual clientId

app.intent('actions.intent.MAIN', async conv => {
    app.auth.client.id = global.gConfig.GOOGLE_ACTION_CLIENT_ID;
})

This approach works initially for a single project. But is fails with Error: Wrong recipient, payload audience != requiredAudience as soon as nodemon reloads the express app.

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Some information regarding my setup:

• ExpressJS server
• actions-on-google client library