leancloud-realtime/src/signature-factory-runner.js

import d from 'debug';
import { tap } from './utils';

const debug = d('LC:SignatureFactoryRunner');

function _validateSignature(signatureResult = {}) {
  const { signature, timestamp, nonce } = signatureResult;
  if (
    typeof signature !== 'string' ||
    typeof timestamp !== 'number' ||
    typeof nonce !== 'string'
  ) {
    throw new Error('malformed signature');
  }
  return {
    signature,
    timestamp,
    nonce,
  };
}

export default (signatureFactory, params) =>
  Promise.resolve()
    .then(() => {
      debug('call signatureFactory with %O', params);
      return signatureFactory(...params);
    })
    .then(
      tap(signatureResult => debug('sign result %O', signatureResult)),
      error => {
        // eslint-disable-next-line no-param-reassign
        error.message = `sign error: ${error.message}`;
        debug(error);
        throw error;
      }
    )
    .then(_validateSignature);