message: Change error-handling to reject promise with error
diff: @@ -170,9 +170,8 @@ export default abstract class Layer2ChainWeb3Strategy
  return Promise.resolve(result.prepaidCardAddresses[0]);
  } catch (e) {
  - // FIXME what is to be done? in error cases
  console.log('prepaid card create error', e);
  - return Promise.resolve('NO');
  + return Promise.reject(e);
  }
  }
  