Writing a Subscriber template

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I am trying to write a subscriber template that can be initialized using any type of message and with an assignable callback. Below is my code for this template, and as such it compiles, however attempting to instantiate any subscribers with it causes huge error messages which mainly have to do with template argument deduction failing as far as I can tell. Is this type of subscriber even possible? Any info would be greatly appreciated.

template <typename ROSMSG>
class MinimalSubscriber : public rclcpp::Node

{

public:
MinimalSubscriber(const std::string& topic, const std::function<void(const ROSMSG&)>& callback)
: Node("minimal_subscriber")
{
  bound_callback_func=std::bind(callback, std::placeholders::_1, topic);
  subscription_ = this->create_subscription<ROSMSG>(
  topic, 10, &MinimalSubscriber::bound_callback_func);
}
private:

std::function<void(const std::shared_ptr<ROSMSG>)> bound_callback_func = nullptr;
typename rclcpp::Subscription<ROSMSG>::SharedPtr subscription_;

};



template <typename ROSMSG>
class State {
public:
  State() = default;

  void init(const std::string& topic, const std::function<void(const ROSMSG&)> callback){
      node_=rclcpp::Node::make_shared<MinimalSubscriber<ROSMSG>(topic, callback)>;
      subscription_=node_->create_subscription<ROSMSG>(topic, 10, callback); //THIS LINE FAILS TO COMPILE
   }

  void set(ROSMSG value) {
    last_update_time = subscription_->now();
    holder_.set(value);
    }
  }

  ROSMSG get() { return holder_.get(); }

private:
  rclcpp::Node::SharedPtr node_; 
  std::function<void(const ROSMSG&)> callback_{nullptr}; 
  Holder<ROSMSG> holder_;
  typename iiwa_ros::MinimalSubscriber<ROSMSG>::SharedPtr subscription_=nullptr;
};