Problem connecting In-Game Purchases in the PlayGama Bridge add-on

Godot Version 4.6

I’m trying to connect In-Game Purchases. (for Yandex Games)

I don’t understand what needs to be written in the config file.
I only understand what “test_product” needs to be replaced with.

What should I write instead of “playgama”, “amount”, “playdeck”, “amount”, “description”?

 "payments": [
        {
            "id": "test_product",
            "playgama": {
                "amount": 1 // int price in Gam
            },
            "playdeck": {
                "amount": 1, // int price in Telegram Stars
                "description": "TEST PRODUCT"
            }
        }
    ]

(after exporting the project) when calling this function success always returns false and purchases returns only [ ]

func _ready():
    Bridge.payments.get_purchases(Callable(self, "_on_get_purchases_completed"))

func _on_get_purchases_completed(success, purchases):
    print(success)

What should I write in var options = { } or can I leave it empty?

func _ready():
    var id = "test_product" # id you specified in the config file
    var options = { } # optional
    Bridge.payments.purchase(id, options, Callable(self, "_on_purchase_completed"))

func _on_purchase_completed(success, purchase):
    print(success)
    print(purchase)