get: async (url: string, config?: AxiosRequestConfig) => {
    if (config) {
      config.url = url;
    }
    const fingerprint = JSON.stringify(config || url);
    const isNeedCache = !whitelist.length || whitelist.includes(url);
    const hashKey = hash
      .sha256()
      .update(fingerprint)
      .digest('hex');

    if (expiry !== 0) {
      const cached = sessionStorage.getItem(hashKey);
      const lastCachedTS: number = +sessionStorage.getItem(`${hashKey}:TS`);
      if (cached !== null && lastCachedTS !== null) {
        const age = (Date.now() - lastCachedTS) / 1000;
        if (age < expiry) {
          return JSON.parse(cached);
        }
        sessionStorage.removeItem(hashKey);
        sessionStorage.removeItem(`${hashKey}:TS`);
      }
    }

    const rsp = await instance.get(url, config);

    if (isNeedCache) {
      cacheRsp(rsp, hashKey);
    }
    return rsp;
  },

export function ripemd160(data: Arrayish): string {
    return '0x' + (hash.ripemd160().update(arrayify(data)).digest('hex'));
}