export declare enum CallbackType {
    PG_ORDER_COMPLETED = 0,
    PG_ORDER_FAILED = 1,
    PG_TRANSACTION_ATTEMPT_FAILED = 2,
    PG_REFUND_COMPLETED = 3,
    PG_REFUND_FAILED = 4,
    PG_REFUND_ACCEPTED = 5,
    CHECKOUT_ORDER_COMPLETED = 6,
    CHECKOUT_ORDER_FAILED = 7,
    CHECKOUT_TRANSACTION_ATTEMPT_FAILED = 8
}