How do I set the type of the rejection of my promise? Let's say I do:

const start = (): Promise<string> => {

   return new Promise((resolve, reject) => {

      if (someCondition) {

         resolve('correct!');

      } else {

         reject(-1);

      }

   });

}

Let's say I want to reject with a number. But I cannot set the type; I can pass whatever I want to the reject here.

Moreover, when using this promise, I want to have compiling error if I use the rejection response type incorrectly.