coordinatorPayloadAdded.swift

    @IBAction func buyTapped(_ sender: Any) {
        coordinator?.buySubscription(payload: "payload here")
    }
    
    // -------------------------------
    
        func buySubscription(payload: String) {
        let vc = BuyViewController.instantiate()
        vc.payload = payload
        vc.coordinator = self
        navigationController.pushViewController(vc, animated: true)
    }
    
    // -------------------------------
    
    class BuyViewController: UIViewController, Storyboarded {
    
    weak var coordinator: MainCoordinator?
    
    var payload: String
}