Get Shopify checkout ID from Javascript React

[hieutherealest]

I use Shopify Javascript React to do custom Checkout UI for clients. i use checkoutShippingAddressUpdateV2 api to update the address at checkout, but i can't get the checkout ID, i use `window` but it doesn't work, is there any way guys?

[Digico]

Hello,

Shopify Flow doesn't have access to this data, it's not part of the default credentials of Flow.

This requires an app to have unauthenticated_write_checkouts access. Can you check this?

https://shopify.dev/docs/api/storefront/2022-04/mutations/checkoutshippingaddressupdatev2

Requires unauthenticated_write_checkouts access scope.