Heat the butter in a saucepot over medium heat. Add the chiles, ginger and whites of the scallions and stir 2 minutes. Add the chicken stock, rice, coconut and lime zest. Bring to a boil, then reduce the heat to a simmer and cover. Cook 17 to 18 minutes. Add in the chickpeas in the last 5 minutes of cooking. Finish the rice by stirring in the lime juice, the greens of the scallions and cilantro.