'use strict';
  
  const coreapi = require('komodo-sdk/coreapi');
  
  async function lookup(number) {
      if (!number) return;
  
      const [err, lookupResult] = await coreapi({
          path: '/prefixes/lookup',
          method: 'GET',
          qs: {
              number,
          }
      });
  
      if (err || !lookupResult || lookupResult.error) {
          return;
      }
  
      return lookupResult.prefix;
  }
  
  exports.lookup = lookup;