The cart key (if not manually set), can be found via a few methods…
Categories: Developer (1) · Getting Started (1) · Questions (14) · Requesting support from us (9) · Snippets (7) · WP-CLI (1)
This feature is designed to transfer the cart over to the native version of your store. It allows the customer to continue shopping or checkout what they already have in the cart added via your decoupled store.
For more handling over CoCart for your store or a clients store, you will find that using the wp-config.php file is the best place to setup certain conditions.