shop.interact("Trade");
        new ConditionalSleep(Script.random(4000, 8000)) {
            @Override
            public boolean condition() {
                return store.isOpen();
            }
        };

 

the ConditionalSleep is supposed to wait 4 to 8 seconds or until store is opened, but neither of those are working 

 

shop.interact("Trade");
        new ConditionalSleep(Script.random(4000, 8000)) {
            @Override
            public boolean condition() {
                return store.isOpen();
            }
        }.sleep();

 

You're constructing a new ConditionalSleep, but never using it so ofcourse it isn't working!

You're going to need the call sleep method:

ConditionalSleep awaitShop = new ConditionalSleep(Script.random(4000, 8000)) {
  @Override
  public boolean condition() {
 	 return store.isOpen();
  }
};

if (shop.interact("Trade") && awaitShop.sleep()) {
  log("hi!");
}