The Facebook Business Extension, v1 is currently only available to whitelisted Partners. Please contact your Facebook representative for access.
The UI must have a button to open the Facebook Onboarding Flow popup.
The popup should be launched with window.open(...). The URL of the popup differs based on whether the user is a first-time user or not: For first-time users:
For return users, where the
merchant_settings_id should be the ID your plugin received from the set merchant settings message: