code: function getTransactionAndRespond(account, identifier, options, callback) {
    getTransaction(
      this,
      account,
      identifier,
      options,
      function(error, transaction) {
        if (error) {
          callback(error);
        } else {
          callback(null, {transaction: transaction});
        }
      }
    );
  }
docs: Wrapper around getTransaction function that is
  meant to be used directly as a client-facing function.
  Unlike getTransaction, it will call next with any errors
  and send a JSON response to the client on success.
  
  See getTransaction for parameter details