BinanceThrottle.ts

import * as PromiseThrottle from 'promise-throttle';

function makeThrottle(requestsPerSecond: number) {
  const promiseThrottle = new PromiseThrottle({ requestsPerSecond });

  return (weight: number = 1) => (target: any, key: string, descriptor: PropertyDescriptor) => {
    if (descriptor === undefined) {
      descriptor = Object.getOwnPropertyDescriptor(target, key);
    }

    const original = descriptor.value;

    descriptor.value = function(...args) {
      return promiseThrottle.add(() => original.apply(this, args), weight);
    };
  };
}

export default makeThrottle;