flame/middleware/asyncWrapper.js

// const asyncWrapper = foo => (req, res, next) => {
//   return Promise
//     .resolve(foo(req, res, next))
//     .catch(next);
// }

// module.exports = asyncWrapper;

function asyncWrapper(foo) {
  return function (req, res, next) {
    return Promise
      .resolve(foo(req, res, next))
      .catch(next);
  }
}

module.exports = asyncWrapper;