square.onGiftCardActivityUpdated subscribes to gift_card.activity.updated for the selected seller. It requires GIFTCARDS_READ.
Example
automations/square-on-gift-card-activity-updated.automation.ts
Event
A REDEEM or IMPORT gift card activity was updated. For REDEEM activities, this event is invoked when the status changes from PENDING to COMPLETED or CANCELED . This status change applies only when the gift card was redeemed using Square Point of Sale or the Square Dashboard. For IMPORT activities, this event is invoked when the balance of an imported third-party gift card is updated by Square. The signal resolves to the officialSquare.GiftCardActivityUpdatedEvent payload with type narrowed to gift_card.activity.updated.