How to destructure a Stripe object - stripe-payments

Question

I have written the following web hook to capture events coming from stripe after a user has amended a subscription:
export const stripeWebhookEvents = functions.https.onRequest( async ( request: any, response: any ) => {
// Retrieve the event by verifying the signature using the raw body and secret.
let event;
const signature = request.headers["stripe-signature"];
try {
event = stripe.webhooks.constructEvent(
request.rawBody,
signature,
STRIPE_WEBHOOK
);
} catch (err) {
console.log("⚠️ Webhook signature verification failed.", err);
return response.sendStatus(400);
}
// Extract the object from the event.
const eventType = event.type;
console.log(`Scripe event type: ${eventType}.`);
// Handle the event
switch (eventType) {
case "customer.subscription.created": {
// Occurs whenever a customer is signed up for a new plan.
console.log("customer.subscription.created");
try {
const session = event.data.object;
console.log("stripe customer: ", session.customer);
const userRecord = await getUserWithStripeCustomerID(session.customer);
console.log("userRecord: ", userRecord);
const data = {
"subscription_status": session.status,
};
await updateUser(userRecord, data);
} catch (error) {
console.log(error);
}
break;
}
case "customer.subscription.updated": {
// Occurs whenever a subscription changes (e.g., switching from one plan to another,
// or changing the status from trial to active).
break;
}
case "customer.subscription.deleted": {
// The subscription has been deleted so update the user document so that it shows
// that the subscription is inactive.
}
case "invoice.payment_failed": {
// The payment failed or the customer does not have a valid payment method.
// The subscription becomes past_due. Notify your customer and send them to the
// customer portal to update their payment information.
// update the user document so that it shows that the subscription is inactive.
break;
}
default: {
// Unexpected event type
console.log(`Unhandled event type ${eventType}.`);
}
}
response.sendStatus(200);
});
The subscription object that is received from stripe is:
{
"id": "sub_JhxDD458se1T1c",
"object": "subscription",
"application_fee_percent": null,
"automatic_tax": {
"enabled": false
},
"billing_cycle_anchor": 1624221102,
"billing_thresholds": null,
"cancel_at": null,
"cancel_at_period_end": false,
"canceled_at": null,
"collection_method": "charge_automatically",
"created": 1624221102,
"current_period_end": 1626813102,
"current_period_start": 1624221102,
"customer": "cus_FJ9HCZk3rCSlxD",
"days_until_due": null,
"default_payment_method": null,
"default_source": null,
"default_tax_rates": [],
"discount": null,
"ended_at": null,
"items": {
"object": "list",
"data": [
{
"id": "si_JhxDPLJExCLmnu",
"object": "subscription_item",
"billing_thresholds": null,
"created": 1624221103,
"metadata": {},
"price": {
"id": "price_1J3q2zHx6drz9dmy2bMdkXOs",
"object": "price",
"active": true,
"billing_scheme": "per_unit",
"created": 1624054821,
"currency": "gbp",
"livemode": false,
"lookup_key": null,
"metadata": {},
"nickname": null,
"product": "prod_JhEWBSIjTi2nlt",
"recurring": {
"aggregate_usage": null,
"interval": "month",
"interval_count": 1,
"usage_type": "licensed"
},
"tax_behavior": "unspecified",
"tiers_mode": null,
"transform_quantity": null,
"type": "recurring",
"unit_amount": 1299,
"unit_amount_decimal": "1299"
},
"quantity": 1,
"subscription": "sub_JhxDD458se1T1c",
"tax_rates": []
}
],
"has_more": false,
"url": "/v1/subscription_items?subscription=sub_JhxDD458se1T1c"
},
"latest_invoice": null,
"livemode": false,
"metadata": {},
"next_pending_invoice_item_invoice": null,
"pause_collection": null,
"pending_invoice_item_interval": null,
"pending_setup_intent": null,
"pending_update": null,
"schedule": null,
"start_date": 1624221102,
"status": "active",
"transfer_data": null,
"trial_end": null,
"trial_start": null
}
When the "customer.subscription.created" I want to update the price id ("price_1J3q2zHx6drz9dmy2bMdkXOs") but I am not sure how to retrieve it. I have tried:
session.items.data[price.id]
but it doesn't work. How do I access the price id?