Not return value from custom helper - node.js

Question

I have problem with my node.js helper. My helper send post request to payu API, API return access_token which i need. If receive access_token then i need return him.
My code:
module.exports = {
createPaymentToken: async () => {
const response = await request({
method: 'POST',
json: false,
url: payuAuthUrl,
form: {
'grant_type': 'client_credentials',
'client_id': payuMerchantID,
'client_secret': payuSecret,
}
},
function (error, response, body) {
if (response) {
const result = (JSON.parse(body));
const token = result.access_token;
return token;
}
}
);
},
When i add console.log(token) before return token, then i see my access_token. The problem is when I want to pass this token to the controller, i.e. it reaches me undefined.
My controller
testPayment: async (req, res) => {
var result = await payuHelper.createPaymentToken();
res.send({
result
});
},
I have no idea what I'm doing wrong.

Answer 1

Your return statement was placed inside callback, so the createPaymentToken function doesn't return anything, just fix your code like sample below:
module.exports = {
createPaymentToken: () => {
return new Promise((resolve, reject) => {
request({
method: 'POST',
json: false,
url: payuAuthUrl,
form: {
'grant_type': 'client_credentials',
'client_id': payuMerchantID,
'client_secret': payuSecret,
}
},
function (error, response, body) {
if (error) {
return reject(error)
}
if (response) {
const result = (JSON.parse(body));
const token = result.access_token;
return resolve(token);
}
}
);
})
},
}
Promise document