square.onInvoicePublished subscribes to invoice.published for the selected seller. It requires INVOICES_READ.
Example
automations/square-on-invoice-published.automation.ts
Event
An invoice was published. This also applies to invoices that are published but scheduled to be processed at a later time. The signal resolves to the officialSquare.InvoicePublishedEvent payload with type narrowed to invoice.published.